Merge tag 'v5.2' into next

Sync up with mainline to resolve conflicts in iforce driver.

163 files changed, 3698 insertions, 1725 deletions

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 4ca0cdfa6b33..3872e03d9a59 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # HID driver configuration
 #
@@ -231,6 +232,16 @@ config HID_COUGAR
 	Supported devices:
 	- Cougar 500k Gaming Keyboard
 
+config HID_MACALLY
+	tristate "Macally devices"
+	depends on HID
+	help
+	Support for Macally devices that are not fully compliant with the
+	HID standard.
+
+	supported devices:
+	- Macally ikey keyboard
+
 config HID_PRODIKEYS
 	tristate "Prodikeys PC-MIDI Keyboard support"
 	depends on HID && SND
@@ -511,6 +522,7 @@ config HID_LOGITECH
 
 config HID_LOGITECH_DJ
 	tristate "Logitech Unifying receivers full support"
+	depends on USB_HID
 	depends on HIDRAW
 	depends on HID_LOGITECH
 	select HID_LOGITECH_HIDPP
@@ -1003,6 +1015,22 @@ config HID_UDRAW_PS3
 	  Say Y here if you want to use the THQ uDraw gaming tablet for
 	  the PS3.
 
+config HID_U2FZERO
+	tristate "U2F Zero LED and RNG support"
+	depends on USB_HID
+	depends on LEDS_CLASS
+	depends on HW_RANDOM
+	help
+	  Support for the LED of the U2F Zero device.
+
+	  U2F Zero supports custom commands for blinking the LED
+	  and getting data from the internal hardware RNG.
+	  The internal hardware can be used to feed the enthropy pool.
+
+	  U2F Zero only supports blinking its LED, so this driver doesn't
+	  allow setting the brightness to anything but 1, which will
+	  trigger a single blink and immediately reset to back 0.
+
 config HID_WACOM
 	tristate "Wacom Intuos/Graphire tablet support (USB)"
 	depends on USB_HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 170163b41303..cc5d827c9164 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -65,6 +65,7 @@ obj-$(CONFIG_HID_LENOVO)	+= hid-lenovo.o
 obj-$(CONFIG_HID_LOGITECH)	+= hid-logitech.o
 obj-$(CONFIG_HID_LOGITECH_DJ)	+= hid-logitech-dj.o
 obj-$(CONFIG_HID_LOGITECH_HIDPP)	+= hid-logitech-hidpp.o
+obj-$(CONFIG_HID_MACALLY)	+= hid-macally.o
 obj-$(CONFIG_HID_MAGICMOUSE)	+= hid-magicmouse.o
 obj-$(CONFIG_HID_MALTRON)	+= hid-maltron.o
 obj-$(CONFIG_HID_MAYFLASH)	+= hid-mf.o
@@ -109,6 +110,7 @@ obj-$(CONFIG_HID_THRUSTMASTER)	+= hid-tmff.o
 obj-$(CONFIG_HID_TIVO)		+= hid-tivo.o
 obj-$(CONFIG_HID_TOPSEED)	+= hid-topseed.o
 obj-$(CONFIG_HID_TWINHAN)	+= hid-twinhan.o
+obj-$(CONFIG_HID_U2FZERO)	+= hid-u2fzero.o
 hid-uclogic-objs		:= hid-uclogic-core.o \
 				   hid-uclogic-rdesc.o \
 				   hid-uclogic-params.o
@@ -134,3 +136,4 @@ obj-$(CONFIG_USB_KBD)		+= usbhid/
 obj-$(CONFIG_I2C_HID)		+= i2c-hid/
 
 obj-$(CONFIG_INTEL_ISH_HID)	+= intel-ish-hid/
+obj-$(INTEL_ISH_FIRMWARE_DOWNLOADER)	+= intel-ish-hid/
diff --git a/drivers/hid/hid-a4tech.c b/drivers/hid/hid-a4tech.c
index 9428ea7cdf8a..98bf694626f7 100644
--- a/drivers/hid/hid-a4tech.c
+++ b/drivers/hid/hid-a4tech.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some a4tech "special" devices
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
@@ -38,8 +35,10 @@ static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 {
 	struct a4tech_sc *a4 = hid_get_drvdata(hdev);
 
-	if (usage->type == EV_REL && usage->code == REL_WHEEL)
+	if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) {
 		set_bit(REL_HWHEEL, *bit);
+		set_bit(REL_HWHEEL_HI_RES, *bit);
+	}
 
 	if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007)
 		return -1;
@@ -60,7 +59,7 @@ static int a4_event(struct hid_device *hdev, struct hid_field *field,
 	input = field->hidinput->input;
 
 	if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) {
-		if (usage->type == EV_REL && usage->code == REL_WHEEL) {
+		if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) {
 			a4->delayed_value = value;
 			return 1;
 		}
@@ -68,6 +67,8 @@ static int a4_event(struct hid_device *hdev, struct hid_field *field,
 		if (usage->hid == 0x000100b8) {
 			input_event(input, EV_REL, value ? REL_HWHEEL :
 					REL_WHEEL, a4->delayed_value);
+			input_event(input, EV_REL, value ? REL_HWHEEL_HI_RES :
+					REL_WHEEL_HI_RES, a4->delayed_value * 120);
 			return 1;
 		}
 	}
@@ -77,8 +78,9 @@ static int a4_event(struct hid_device *hdev, struct hid_field *field,
 		return 1;
 	}
 
-	if (usage->code == REL_WHEEL && a4->hw_wheel) {
+	if (usage->code == REL_WHEEL_HI_RES && a4->hw_wheel) {
 		input_event(input, usage->type, REL_HWHEEL, value);
+		input_event(input, usage->type, REL_HWHEEL_HI_RES, value * 120);
 		return 1;
 	}
 
diff --git a/drivers/hid/hid-accutouch.c b/drivers/hid/hid-accutouch.c
index 4e287160c50a..bb6c997e9efd 100644
--- a/drivers/hid/hid-accutouch.c
+++ b/drivers/hid/hid-accutouch.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * HID driver for Elo Accutouch touchscreens
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-alps.c b/drivers/hid/hid-alps.c
index 3cd7229b6e54..ae79a7c66737 100644
--- a/drivers/hid/hid-alps.c
+++ b/drivers/hid/hid-alps.c
@@ -1,10 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/hid/hid-apple.c b/drivers/hid/hid-apple.c
index 1cb41992aaa1..81df62f48c4c 100644
--- a/drivers/hid/hid-apple.c
+++ b/drivers/hid/hid-apple.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  USB HID quirks support for Linux
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/hid/hid-appleir.c b/drivers/hid/hid-appleir.c
index eae7d52cf1a8..bf8d4afe0d6a 100644
--- a/drivers/hid/hid-appleir.c
+++ b/drivers/hid/hid-appleir.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * HID driver for the apple ir device
  *
@@ -12,15 +13,6 @@
  * Copyright (C) 2010, 2012 Bastien Nocera <hadess@hadess.net>
  * Copyright (C) 2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
  * Copyright (C) 2013 Red Hat Inc. All Rights Reserved
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index 336aeaed1159..5b37c570f611 100644
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Asus notebook built-in keyboard.
  *  Fixes small logical maximum to match usage maximum.
@@ -20,10 +21,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/dmi.h>
diff --git a/drivers/hid/hid-aureal.c b/drivers/hid/hid-aureal.c
index 3280aff28e90..ac8946f80e22 100644
--- a/drivers/hid/hid-aureal.c
+++ b/drivers/hid/hid-aureal.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  HID driver for Aureal Cy se W-01RN USB_V3.1 devices
  *
diff --git a/drivers/hid/hid-axff.c b/drivers/hid/hid-axff.c
index a594e478a1e2..6654c1550e2e 100644
--- a/drivers/hid/hid-axff.c
+++ b/drivers/hid/hid-axff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Force feedback support for ACRUX game controllers
  *
@@ -12,19 +13,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/input.h>
diff --git a/drivers/hid/hid-belkin.c b/drivers/hid/hid-belkin.c
index cc4cf138bef5..fc0b3bb383cc 100644
--- a/drivers/hid/hid-belkin.c
+++ b/drivers/hid/hid-belkin.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some belkin "special" devices
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-betopff.c b/drivers/hid/hid-betopff.c
index 69cfc8dc6af1..0790fbd3fc9a 100644
--- a/drivers/hid/hid-betopff.c
+++ b/drivers/hid/hid-betopff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Force feedback support for Betop based devices
  *
@@ -19,10 +20,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 
diff --git a/drivers/hid/hid-cherry.c b/drivers/hid/hid-cherry.c
index f745d2c1325e..6a71187b5cf6 100644
--- a/drivers/hid/hid-cherry.c
+++ b/drivers/hid/hid-cherry.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some cherry "special" devices
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-chicony.c b/drivers/hid/hid-chicony.c
index 397a789a41be..3f0ed6a95223 100644
--- a/drivers/hid/hid-chicony.c
+++ b/drivers/hid/hid-chicony.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some chicony "special" devices
  *
@@ -10,10 +11,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-cmedia.c b/drivers/hid/hid-cmedia.c
index 7230f8513681..3296c5050264 100644
--- a/drivers/hid/hid-cmedia.c
+++ b/drivers/hid/hid-cmedia.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * HID driver for CMedia CM6533 audio jack controls
  *
  * Copyright (C) 2015 Ben Chen <ben_chen@bizlinktech.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 860e21ec6a49..210b81a56e1a 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID support for Linux
  *
@@ -8,10 +9,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -218,13 +215,14 @@ static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)
  * Add a usage to the temporary parser table.
  */
 
-static int hid_add_usage(struct hid_parser *parser, unsigned usage)
+static int hid_add_usage(struct hid_parser *parser, unsigned usage, u8 size)
 {
 	if (parser->local.usage_index >= HID_MAX_USAGES) {
 		hid_err(parser->device, "usage index exceeded\n");
 		return -1;
 	}
 	parser->local.usage[parser->local.usage_index] = usage;
+	parser->local.usage_size[parser->local.usage_index] = size;
 	parser->local.collection_index[parser->local.usage_index] =
 		parser->collection_stack_ptr ?
 		parser->collection_stack[parser->collection_stack_ptr - 1] : 0;
@@ -486,10 +484,7 @@ static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
 			return 0;
 		}
 
-		if (item->size <= 2)
-			data = (parser->global.usage_page << 16) + data;
-
-		return hid_add_usage(parser, data);
+		return hid_add_usage(parser, data, item->size);
 
 	case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
 
@@ -498,9 +493,6 @@ static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
 			return 0;
 		}
 
-		if (item->size <= 2)
-			data = (parser->global.usage_page << 16) + data;
-
 		parser->local.usage_minimum = data;
 		return 0;
 
@@ -511,9 +503,6 @@ static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
 			return 0;
 		}
 
-		if (item->size <= 2)
-			data = (parser->global.usage_page << 16) + data;
-
 		count = data - parser->local.usage_minimum;
 		if (count + parser->local.usage_index >= HID_MAX_USAGES) {
 			/*
@@ -533,7 +522,7 @@ static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
 		}
 
 		for (n = parser->local.usage_minimum; n <= data; n++)
-			if (hid_add_usage(parser, n)) {
+			if (hid_add_usage(parser, n, item->size)) {
 				dbg_hid("hid_add_usage failed\n");
 				return -1;
 			}
@@ -548,6 +537,22 @@ static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
 }
 
 /*
+ * Concatenate Usage Pages into Usages where relevant:
+ * As per specification, 6.2.2.8: "When the parser encounters a main item it
+ * concatenates the last declared Usage Page with a Usage to form a complete
+ * usage value."
+ */
+
+static void hid_concatenate_usage_page(struct hid_parser *parser)
+{
+	int i;
+
+	for (i = 0; i < parser->local.usage_index; i++)
+		if (parser->local.usage_size[i] <= 2)
+			parser->local.usage[i] += parser->global.usage_page << 16;
+}
+
+/*
  * Process a main item.
  */
 
@@ -556,6 +561,8 @@ static int hid_parser_main(struct hid_parser *parser, struct hid_item *item)
 	__u32 data;
 	int ret;
 
+	hid_concatenate_usage_page(parser);
+
 	data = item_udata(item);
 
 	switch (item->tag) {
@@ -765,6 +772,8 @@ static int hid_scan_main(struct hid_parser *parser, struct hid_item *item)
 	__u32 data;
 	int i;
 
+	hid_concatenate_usage_page(parser);
+
 	data = item_udata(item);
 
 	switch (item->tag) {
@@ -1301,10 +1310,10 @@ static u32 __extract(u8 *report, unsigned offset, int n)
 u32 hid_field_extract(const struct hid_device *hid, u8 *report,
 			unsigned offset, unsigned n)
 {
-	if (n > 256) {
-		hid_warn(hid, "hid_field_extract() called with n (%d) > 256! (%s)\n",
+	if (n > 32) {
+		hid_warn(hid, "hid_field_extract() called with n (%d) > 32! (%s)\n",
 			 n, current->comm);
-		n = 256;
+		n = 32;
 	}
 
 	return __extract(report, offset, n);
@@ -1624,7 +1633,7 @@ static struct hid_report *hid_get_report(struct hid_report_enum *report_enum,
  * Implement a generic .request() callback, using .raw_request()
  * DO NOT USE in hid drivers directly, but through hid_hw_request instead.
  */
-void __hid_request(struct hid_device *hid, struct hid_report *report,
+int __hid_request(struct hid_device *hid, struct hid_report *report,
 		int reqtype)
 {
 	char *buf;
@@ -1633,7 +1642,7 @@ void __hid_request(struct hid_device *hid, struct hid_report *report,
 
 	buf = hid_alloc_report_buf(report, GFP_KERNEL);
 	if (!buf)
-		return;
+		return -ENOMEM;
 
 	len = hid_report_len(report);
 
@@ -1650,8 +1659,11 @@ void __hid_request(struct hid_device *hid, struct hid_report *report,
 	if (reqtype == HID_REQ_GET_REPORT)
 		hid_input_report(hid, report->type, buf, ret, 0);
 
+	ret = 0;
+
 out:
 	kfree(buf);
+	return ret;
 }
 EXPORT_SYMBOL_GPL(__hid_request);
 
diff --git a/drivers/hid/hid-corsair.c b/drivers/hid/hid-corsair.c
index ec9e060ec46c..902a60e249ed 100644
--- a/drivers/hid/hid-corsair.c
+++ b/drivers/hid/hid-corsair.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * HID driver for Corsair devices
  *
@@ -13,10 +14,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-cp2112.c b/drivers/hid/hid-cp2112.c
index 47f65857408d..8bbe3d0cbe5d 100644
--- a/drivers/hid/hid-cp2112.c
+++ b/drivers/hid/hid-cp2112.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * hid-cp2112.c - Silicon Labs HID USB to SMBus master bridge
  * Copyright (c) 2013,2014 Uplogix, Inc.
  * David Barksdale <dbarksdale@uplogix.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
  */
 
 /*
diff --git a/drivers/hid/hid-cypress.c b/drivers/hid/hid-cypress.c
index 1689568b597d..a50ba4a4a1d7 100644
--- a/drivers/hid/hid-cypress.c
+++ b/drivers/hid/hid-cypress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some cypress "special" devices
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-debug.c b/drivers/hid/hid-debug.c
index 1384e57182af..9453147d020d 100644
--- a/drivers/hid/hid-debug.c
+++ b/drivers/hid/hid-debug.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  (c) 1999 Andreas Gal		<gal@cs.uni-magdeburg.de>
  *  (c) 2000-2001 Vojtech Pavlik	<vojtech@ucw.cz>
@@ -7,19 +8,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  * Should you need to contact me, the author, you can do so either by
  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
diff --git a/drivers/hid/hid-dr.c b/drivers/hid/hid-dr.c
index 818ea7d93533..17e17f9a597b 100644
--- a/drivers/hid/hid-dr.c
+++ b/drivers/hid/hid-dr.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Force feedback support for DragonRise Inc. game controllers
  *
@@ -12,19 +13,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/input.h>
diff --git a/drivers/hid/hid-elan.c b/drivers/hid/hid-elan.c
index 1c62095cee99..45c4f888b7c4 100644
--- a/drivers/hid/hid-elan.c
+++ b/drivers/hid/hid-elan.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * HID Driver for ELAN Touchpad
  *
  * Currently only supports touchpad found on HP Pavilion X2 10
  *
  * Copyright (c) 2016 Alexandrov Stanislav <neko@nya.ai>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-elecom.c b/drivers/hid/hid-elecom.c
index ae8e9413c79d..8c712d4bc075 100644
--- a/drivers/hid/hid-elecom.c
+++ b/drivers/hid/hid-elecom.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for ELECOM devices:
  *  - BM084 Bluetooth Mouse
@@ -13,10 +14,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-elo.c b/drivers/hid/hid-elo.c
index 5eea6fe0d7bd..0d22713a3874 100644
--- a/drivers/hid/hid-elo.c
+++ b/drivers/hid/hid-elo.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * HID driver for ELO usb touchscreen 4000/4500
  *
  * Copyright (c) 2013 Jiri Slaby
  *
  * Data parsing taken from elousb driver by Vojtech Pavlik.
- *
- * This driver is licensed under the terms of GPLv2.
  */
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-emsff.c b/drivers/hid/hid-emsff.c
index d82d75bb11f7..7cd5651872d3 100644
--- a/drivers/hid/hid-emsff.c
+++ b/drivers/hid/hid-emsff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Force feedback support for EMS Trio Linker Plus II
  *
@@ -5,19 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 
diff --git a/drivers/hid/hid-ezkey.c b/drivers/hid/hid-ezkey.c
index 212ac6be2451..d14f91d78c96 100644
--- a/drivers/hid/hid-ezkey.c
+++ b/drivers/hid/hid-ezkey.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some ezkey "special" devices
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-gaff.c b/drivers/hid/hid-gaff.c
index 2d8cead3adca..0f95c96b70f8 100644
--- a/drivers/hid/hid-gaff.c
+++ b/drivers/hid/hid-gaff.c
@@ -1,10 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Force feedback support for GreenAsia (Product ID 0x12) based devices
  *
  *  The devices are distributed under various names and the same USB device ID
  *  can be used in many game controllers.
  *
- *
  *  0e8f:0012 "GreenAsia Inc.    USB Joystick     "
  *   - tested with MANTA Warior MM816 and SpeedLink Strike2 SL-6635.
  *
@@ -12,19 +12,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/input.h>
diff --git a/drivers/hid/hid-gembird.c b/drivers/hid/hid-gembird.c
index e55e519f311e..c42593fe7116 100644
--- a/drivers/hid/hid-gembird.c
+++ b/drivers/hid/hid-gembird.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Gembird Joypad, "PC Game Controller"
  *
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-generic.c b/drivers/hid/hid-generic.c
index 3b6eccbc2519..f9db991d3c5a 100644
--- a/drivers/hid/hid-generic.c
+++ b/drivers/hid/hid-generic.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID support for Linux
  *
@@ -10,10 +11,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/module.h>
diff --git a/drivers/hid/hid-gfrm.c b/drivers/hid/hid-gfrm.c
index cf477f8c8f4c..86c317320bf2 100644
--- a/drivers/hid/hid-gfrm.c
+++ b/drivers/hid/hid-gfrm.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * HID driver for Google Fiber TV Box remote controls
  *
  * Copyright (c) 2014-2015 Google Inc.
  *
  * Author: Petri Gynther <pgynther@google.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 #include <linux/device.h>
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-gt683r.c b/drivers/hid/hid-gt683r.c
index a298fbd8db6b..898871c8c768 100644
--- a/drivers/hid/hid-gt683r.c
+++ b/drivers/hid/hid-gt683r.c
@@ -1,18 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * MSI GT683R led driver
  *
  * Copyright (c) 2014 Janne Kanniainen <janne.kanniainen@gmail.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-gyration.c b/drivers/hid/hid-gyration.c
index 288d61c9748e..b99a611479b3 100644
--- a/drivers/hid/hid-gyration.c
+++ b/drivers/hid/hid-gyration.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some gyration "special" devices
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-holtek-kbd.c b/drivers/hid/hid-holtek-kbd.c
index 6e1a4a4fc0c1..b3d502421b79 100644
--- a/drivers/hid/hid-holtek-kbd.c
+++ b/drivers/hid/hid-holtek-kbd.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * HID driver for Holtek keyboard
  * Copyright (c) 2012 Tom Harwood
 */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-holtek-mouse.c b/drivers/hid/hid-holtek-mouse.c
index 78b3a0c76775..195b735b001d 100644
--- a/drivers/hid/hid-holtek-mouse.c
+++ b/drivers/hid/hid-holtek-mouse.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * HID driver for Holtek gaming mice
  * Copyright (c) 2013 Christian Ohm
@@ -6,10 +7,6 @@
 */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-holtekff.c b/drivers/hid/hid-holtekff.c
index edc0f64bb584..10a720558830 100644
--- a/drivers/hid/hid-holtekff.c
+++ b/drivers/hid/hid-holtekff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Force feedback support for Holtek On Line Grip based gamepads
  *
@@ -8,19 +9,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-hyperv.c b/drivers/hid/hid-hyperv.c
index 704049e62d58..7795831d37c2 100644
--- a/drivers/hid/hid-hyperv.c
+++ b/drivers/hid/hid-hyperv.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  Copyright (c) 2009, Citrix Systems, Inc.
  *  Copyright (c) 2010, Microsoft Corporation.
  *  Copyright (c) 2011, Novell Inc.
- *
- *  This program is free software; you can redistribute it and/or modify it
- *  under the terms and conditions of the GNU General Public License,
- *  version 2, as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope it will be useful, but WITHOUT
- *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- *  more details.
  */
 #include <linux/init.h>
 #include <linux/module.h>
@@ -614,5 +606,7 @@ static void __exit mousevsc_exit(void)
 }
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic HID Driver");
+
 module_init(mousevsc_init);
 module_exit(mousevsc_exit);
diff --git a/drivers/hid/hid-icade.c b/drivers/hid/hid-icade.c
index 76b5a7570780..f3716cfaca1f 100644
--- a/drivers/hid/hid-icade.c
+++ b/drivers/hid/hid-icade.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  ION iCade input driver
  *
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index adce58f24f76..b032d3899fa3 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *  USB HID quirks support for Linux
  *
@@ -8,10 +9,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #ifndef HID_IDS_H_FILE
@@ -83,6 +80,7 @@
 #define HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP	0x1220
 #define HID_DEVICE_ID_ALPS_U1		0x1215
 #define HID_DEVICE_ID_ALPS_T4_BTNLESS	0x120C
+#define HID_DEVICE_ID_ALPS_1222		0x1222
 
 
 #define USB_VENDOR_ID_AMI		0x046b
@@ -272,6 +270,7 @@
 #define USB_DEVICE_ID_CHICONY_MULTI_TOUCH	0xb19d
 #define USB_DEVICE_ID_CHICONY_WIRELESS	0x0618
 #define USB_DEVICE_ID_CHICONY_PIXART_USB_OPTICAL_MOUSE	0x1053
+#define USB_DEVICE_ID_CHICONY_PIXART_USB_OPTICAL_MOUSE2	0x0939
 #define USB_DEVICE_ID_CHICONY_WIRELESS2	0x1123
 #define USB_DEVICE_ID_ASUS_AK1D		0x1125
 #define USB_DEVICE_ID_CHICONY_TOSHIBA_WT10A	0x1408
@@ -323,6 +322,7 @@
 #define USB_DEVICE_ID_CYGNAL_RADIO_SI470X	0x818a
 #define USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH	0x81b9
 #define USB_DEVICE_ID_CYGNAL_CP2112	0xea90
+#define USB_DEVICE_ID_U2F_ZERO		0x8acf
 
 #define USB_DEVICE_ID_CYGNAL_RADIO_SI4713       0x8244
 
@@ -571,6 +571,7 @@
 
 #define USB_VENDOR_ID_HUION		0x256c
 #define USB_DEVICE_ID_HUION_TABLET	0x006e
+#define USB_DEVICE_ID_HUION_HS64	0x006d
 
 #define USB_VENDOR_ID_IBM					0x04b3
 #define USB_DEVICE_ID_IBM_SCROLLPOINT_III			0x3100
@@ -762,8 +763,12 @@
 #define USB_DEVICE_ID_S510_RECEIVER_2	0xc517
 #define USB_DEVICE_ID_LOGITECH_CORDLESS_DESKTOP_LX500	0xc512
 #define USB_DEVICE_ID_MX3000_RECEIVER	0xc513
+#define USB_DEVICE_ID_LOGITECH_27MHZ_MOUSE_RECEIVER	0xc51b
 #define USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER	0xc52b
+#define USB_DEVICE_ID_LOGITECH_NANO_RECEIVER		0xc52f
 #define USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2	0xc532
+#define USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_2		0xc534
+#define USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_GAMING	0xc539
 #define USB_DEVICE_ID_SPACETRAVELLER	0xc623
 #define USB_DEVICE_ID_SPACENAVIGATOR	0xc626
 #define USB_DEVICE_ID_DINOVO_DESKTOP	0xc704
@@ -1034,6 +1039,7 @@
 #define USB_DEVICE_ID_SINO_LITE_CONTROLLER	0x3008
 
 #define USB_VENDOR_ID_SOLID_YEAR			0x060b
+#define USB_DEVICE_ID_MACALLY_IKEY_KEYBOARD		0x0001
 #define USB_DEVICE_ID_COUGAR_500K_GAMING_KEYBOARD	0x500a
 #define USB_DEVICE_ID_COUGAR_700K_GAMING_KEYBOARD	0x700a
 
@@ -1083,7 +1089,7 @@
 #define USB_DEVICE_ID_SYNAPTICS_HD	0x0ac3
 #define USB_DEVICE_ID_SYNAPTICS_QUAD_HD	0x1ac3
 #define USB_DEVICE_ID_SYNAPTICS_TP_V103	0x5710
-#define I2C_DEVICE_ID_SYNAPTICS_7E7E	0x7e7e
+#define USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5	0x81a7
 
 #define USB_VENDOR_ID_TEXAS_INSTRUMENTS	0x2047
 #define USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA	0x0855
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 0579b8d3f912..63855f275a38 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright (c) 2000-2001 Vojtech Pavlik
  *  Copyright (c) 2006-2010 Jiri Kosina
@@ -6,19 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  * Should you need to contact me, the author, you can do so either by
  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
@@ -1559,52 +1547,71 @@ static void hidinput_close(struct input_dev *dev)
 	hid_hw_close(hid);
 }
 
-static void hidinput_change_resolution_multipliers(struct hid_device *hid)
+static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
+		struct hid_report *report, bool use_logical_max)
 {
-	struct hid_report_enum *rep_enum;
-	struct hid_report *rep;
 	struct hid_usage *usage;
+	bool update_needed = false;
 	int i, j;
 
-	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
-	list_for_each_entry(rep, &rep_enum->report_list, list) {
-		bool update_needed = false;
+	if (report->maxfield == 0)
+		return false;
 
-		if (rep->maxfield == 0)
-			continue;
+	/*
+	 * If we have more than one feature within this report we
+	 * need to fill in the bits from the others before we can
+	 * overwrite the ones for the Resolution Multiplier.
+	 */
+	if (report->maxfield > 1) {
+		hid_hw_request(hid, report, HID_REQ_GET_REPORT);
+		hid_hw_wait(hid);
+	}
 
-		/*
-		 * If we have more than one feature within this report we
-		 * need to fill in the bits from the others before we can
-		 * overwrite the ones for the Resolution Multiplier.
+	for (i = 0; i < report->maxfield; i++) {
+		__s32 value = use_logical_max ?
+			      report->field[i]->logical_maximum :
+			      report->field[i]->logical_minimum;
+
+		/* There is no good reason for a Resolution
+		 * Multiplier to have a count other than 1.
+		 * Ignore that case.
 		 */
-		if (rep->maxfield > 1) {
-			hid_hw_request(hid, rep, HID_REQ_GET_REPORT);
-			hid_hw_wait(hid);
-		}
+		if (report->field[i]->report_count != 1)
+			continue;
 
-		for (i = 0; i < rep->maxfield; i++) {
-			__s32 logical_max = rep->field[i]->logical_maximum;
+		for (j = 0; j < report->field[i]->maxusage; j++) {
+			usage = &report->field[i]->usage[j];
 
-			/* There is no good reason for a Resolution
-			 * Multiplier to have a count other than 1.
-			 * Ignore that case.
-			 */
-			if (rep->field[i]->report_count != 1)
+			if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
 				continue;
 
-			for (j = 0; j < rep->field[i]->maxusage; j++) {
-				usage = &rep->field[i]->usage[j];
+			report->field[i]->value[j] = value;
+			update_needed = true;
+		}
+	}
 
-				if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
-					continue;
+	return update_needed;
+}
 
-				*rep->field[i]->value = logical_max;
-				update_needed = true;
+static void hidinput_change_resolution_multipliers(struct hid_device *hid)
+{
+	struct hid_report_enum *rep_enum;
+	struct hid_report *rep;
+	int ret;
+
+	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
+	list_for_each_entry(rep, &rep_enum->report_list, list) {
+		bool update_needed = __hidinput_change_resolution_multipliers(hid,
+								     rep, true);
+
+		if (update_needed) {
+			ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
+			if (ret) {
+				__hidinput_change_resolution_multipliers(hid,
+								    rep, false);
+				return;
 			}
 		}
-		if (update_needed)
-			hid_hw_request(hid, rep, HID_REQ_SET_REPORT);
 	}
 
 	/* refresh our structs */
diff --git a/drivers/hid/hid-ite.c b/drivers/hid/hid-ite.c
index 98b059d79bc8..a45f2352618d 100644
--- a/drivers/hid/hid-ite.c
+++ b/drivers/hid/hid-ite.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * HID driver for some ITE "special" devices
  * Copyright (c) 2017 Hans de Goede <hdegoede@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-jabra.c b/drivers/hid/hid-jabra.c
index 1f52daf14426..41dc30fe2d16 100644
--- a/drivers/hid/hid-jabra.c
+++ b/drivers/hid/hid-jabra.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Jabra USB HID Driver
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-kensington.c b/drivers/hid/hid-kensington.c
index fe9a99dd8d08..b31f7f431a3f 100644
--- a/drivers/hid/hid-kensington.c
+++ b/drivers/hid/hid-kensington.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Kensigton Slimblade Trackball
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-keytouch.c b/drivers/hid/hid-keytouch.c
index 3074671b7d6a..73bf8642dfe3 100644
--- a/drivers/hid/hid-keytouch.c
+++ b/drivers/hid/hid-keytouch.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Keytouch devices not fully compliant with HID standard
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-kye.c b/drivers/hid/hid-kye.c
index 679d422b885a..c8b40c07eca6 100644
--- a/drivers/hid/hid-kye.c
+++ b/drivers/hid/hid-kye.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Kye/Genius devices not fully compliant with HID standard
  *
@@ -7,10 +8,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-lcpower.c b/drivers/hid/hid-lcpower.c
index 6424cfdb7737..8acd3ee5ada5 100644
--- a/drivers/hid/hid-lcpower.c
+++ b/drivers/hid/hid-lcpower.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for LC Power Model RC1000MCE
  *
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-led.c b/drivers/hid/hid-led.c
index d3e1ab162f7c..c2c66ceca132 100644
--- a/drivers/hid/hid-led.c
+++ b/drivers/hid/hid-led.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Simple USB RGB LED driver
  *
  * Copyright 2016 Heiner Kallweit <hkallweit1@gmail.com>
  * Based on drivers/hid/hid-thingm.c and
  * drivers/usb/misc/usbled.c
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2.
  */
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index eacc76d2ab96..364bc7f11d9d 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Lenovo:
  *  - ThinkPad USB Keyboard with TrackPoint (tpkbd)
@@ -20,10 +21,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/module.h>
diff --git a/drivers/hid/hid-lg.c b/drivers/hid/hid-lg.c
index 5d419a95b6c2..c8c6d0436ac9 100644
--- a/drivers/hid/hid-lg.c
+++ b/drivers/hid/hid-lg.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some logitech "special" devices
  *
@@ -10,10 +11,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
@@ -876,8 +873,6 @@ static const struct hid_device_id lg_devices[] = {
 		.driver_data = LG_RDESC | LG_WIRELESS },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER),
 		.driver_data = LG_RDESC | LG_WIRELESS },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2),
-		.driver_data = LG_RDESC | LG_WIRELESS },
 
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RECEIVER),
 		.driver_data = LG_BAD_RELATIVE_KEYS },
diff --git a/drivers/hid/hid-lg2ff.c b/drivers/hid/hid-lg2ff.c
index 0e3fb1a7e421..dd1a6c3a7de6 100644
--- a/drivers/hid/hid-lg2ff.c
+++ b/drivers/hid/hid-lg2ff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Force feedback support for Logitech RumblePad and Rumblepad 2
  *
@@ -5,19 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 
diff --git a/drivers/hid/hid-lg3ff.c b/drivers/hid/hid-lg3ff.c
index 8c2da183d3bc..9ecb6fd06203 100644
--- a/drivers/hid/hid-lg3ff.c
+++ b/drivers/hid/hid-lg3ff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Force feedback support for Logitech Flight System G940
  *
@@ -5,19 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index a299c9d1605f..cefba038520c 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Force feedback support for Logitech Gaming Wheels
  *
@@ -8,19 +9,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 
diff --git a/drivers/hid/hid-lgff.c b/drivers/hid/hid-lgff.c
index e1394af0ae7b..c79a6ec43745 100644
--- a/drivers/hid/hid-lgff.c
+++ b/drivers/hid/hid-lgff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Force feedback support for hid-compliant for some of the devices from
  * Logitech, namely:
@@ -9,19 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  * Should you need to contact me, the author, you can do so by
  * e-mail - mail your message to <johann.deneux@it.uu.se>
diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c
index 826fa1e1c8d9..bfcf2ee58d14 100644
--- a/drivers/hid/hid-logitech-dj.c
+++ b/drivers/hid/hid-logitech-dj.c
@@ -1,37 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  HID driver for Logitech Unifying receivers
  *
  *  Copyright (c) 2011 Logitech
  */
 
-/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
 
 
 #include <linux/device.h>
 #include <linux/hid.h>
 #include <linux/module.h>
-#include <linux/usb.h>
 #include <linux/kfifo.h>
+#include <linux/delay.h>
+#include <linux/usb.h> /* For to_usb_interface for kvm extra intf check */
 #include <asm/unaligned.h>
 #include "hid-ids.h"
 
 #define DJ_MAX_PAIRED_DEVICES			6
-#define DJ_MAX_NUMBER_NOTIFICATIONS		8
+#define DJ_MAX_NUMBER_NOTIFS			8
 #define DJ_RECEIVER_INDEX			0
 #define DJ_DEVICE_INDEX_MIN			1
 #define DJ_DEVICE_INDEX_MAX			6
@@ -44,6 +30,7 @@
 
 #define REPORT_ID_HIDPP_SHORT			0x10
 #define REPORT_ID_HIDPP_LONG			0x11
+#define REPORT_ID_HIDPP_VERY_LONG		0x12
 
 #define HIDPP_REPORT_SHORT_LENGTH		7
 #define HIDPP_REPORT_LONG_LENGTH		20
@@ -74,7 +61,6 @@
 /* Device Un-Paired Notification */
 #define REPORT_TYPE_NOTIF_DEVICE_UNPAIRED	0x40
 
-
 /* Connection Status Notification */
 #define REPORT_TYPE_NOTIF_CONNECTION_STATUS	0x42
 #define CONNECTION_STATUS_PARAM_STATUS		0x00
@@ -94,12 +80,44 @@
 #define REPORT_TYPE_LEDS			0x0E
 
 /* RF Report types bitfield */
-#define STD_KEYBOARD				0x00000002
-#define STD_MOUSE				0x00000004
-#define MULTIMEDIA				0x00000008
-#define POWER_KEYS				0x00000010
-#define MEDIA_CENTER				0x00000100
-#define KBD_LEDS				0x00004000
+#define STD_KEYBOARD				BIT(1)
+#define STD_MOUSE				BIT(2)
+#define MULTIMEDIA				BIT(3)
+#define POWER_KEYS				BIT(4)
+#define MEDIA_CENTER				BIT(8)
+#define KBD_LEDS				BIT(14)
+/* Fake (bitnr > NUMBER_OF_HID_REPORTS) bit to track HID++ capability */
+#define HIDPP					BIT_ULL(63)
+
+/* HID++ Device Connected Notification */
+#define REPORT_TYPE_NOTIF_DEVICE_CONNECTED	0x41
+#define HIDPP_PARAM_PROTO_TYPE			0x00
+#define HIDPP_PARAM_DEVICE_INFO			0x01
+#define HIDPP_PARAM_EQUAD_LSB			0x02
+#define HIDPP_PARAM_EQUAD_MSB			0x03
+#define HIDPP_PARAM_27MHZ_DEVID			0x03
+#define HIDPP_DEVICE_TYPE_MASK			GENMASK(3, 0)
+#define HIDPP_LINK_STATUS_MASK			BIT(6)
+#define HIDPP_MANUFACTURER_MASK			BIT(7)
+
+#define HIDPP_DEVICE_TYPE_KEYBOARD		1
+#define HIDPP_DEVICE_TYPE_MOUSE			2
+
+#define HIDPP_SET_REGISTER			0x80
+#define HIDPP_GET_LONG_REGISTER			0x83
+#define HIDPP_REG_CONNECTION_STATE		0x02
+#define HIDPP_REG_PAIRING_INFORMATION		0xB5
+#define HIDPP_PAIRING_INFORMATION		0x20
+#define HIDPP_FAKE_DEVICE_ARRIVAL		0x02
+
+enum recvr_type {
+	recvr_type_dj,
+	recvr_type_hidpp,
+	recvr_type_gaming_hidpp,
+	recvr_type_mouse_only,
+	recvr_type_27mhz,
+	recvr_type_bluetooth,
+};
 
 struct dj_report {
 	u8 report_id;
@@ -108,23 +126,51 @@ struct dj_report {
 	u8 report_params[DJREPORT_SHORT_LENGTH - 3];
 };
 
+struct hidpp_event {
+	u8 report_id;
+	u8 device_index;
+	u8 sub_id;
+	u8 params[HIDPP_REPORT_LONG_LENGTH - 3U];
+} __packed;
+
 struct dj_receiver_dev {
-	struct hid_device *hdev;
+	struct hid_device *mouse;
+	struct hid_device *keyboard;
+	struct hid_device *hidpp;
 	struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES +
 					    DJ_DEVICE_INDEX_MIN];
+	struct list_head list;
+	struct kref kref;
 	struct work_struct work;
 	struct kfifo notif_fifo;
+	unsigned long last_query; /* in jiffies */
+	bool ready;
+	enum recvr_type type;
+	unsigned int unnumbered_application;
 	spinlock_t lock;
-	bool querying_devices;
 };
 
 struct dj_device {
 	struct hid_device *hdev;
 	struct dj_receiver_dev *dj_receiver_dev;
-	u32 reports_supported;
+	u64 reports_supported;
 	u8 device_index;
 };
 
+#define WORKITEM_TYPE_EMPTY	0
+#define WORKITEM_TYPE_PAIRED	1
+#define WORKITEM_TYPE_UNPAIRED	2
+#define WORKITEM_TYPE_UNKNOWN	255
+
+struct dj_workitem {
+	u8 type;		/* WORKITEM_TYPE_* */
+	u8 device_index;
+	u8 device_type;
+	u8 quad_id_msb;
+	u8 quad_id_lsb;
+	u64 reports_supported;
+};
+
 /* Keyboard descriptor (1) */
 static const char kbd_descriptor[] = {
 	0x05, 0x01,		/* USAGE_PAGE (generic Desktop)     */
@@ -200,6 +246,131 @@ static const char mse_descriptor[] = {
 	0xC0,			/*  END_COLLECTION                      */
 };
 
+/* Mouse descriptor (2) for 27 MHz receiver, only 8 buttons */
+static const char mse_27mhz_descriptor[] = {
+	0x05, 0x01,		/*  USAGE_PAGE (Generic Desktop)        */
+	0x09, 0x02,		/*  USAGE (Mouse)                       */
+	0xA1, 0x01,		/*  COLLECTION (Application)            */
+	0x85, 0x02,		/*    REPORT_ID = 2                     */
+	0x09, 0x01,		/*    USAGE (pointer)                   */
+	0xA1, 0x00,		/*    COLLECTION (physical)             */
+	0x05, 0x09,		/*      USAGE_PAGE (buttons)            */
+	0x19, 0x01,		/*      USAGE_MIN (1)                   */
+	0x29, 0x08,		/*      USAGE_MAX (8)                   */
+	0x15, 0x00,		/*      LOGICAL_MIN (0)                 */
+	0x25, 0x01,		/*      LOGICAL_MAX (1)                 */
+	0x95, 0x08,		/*      REPORT_COUNT (8)                */
+	0x75, 0x01,		/*      REPORT_SIZE (1)                 */
+	0x81, 0x02,		/*      INPUT (data var abs)            */
+	0x05, 0x01,		/*      USAGE_PAGE (generic desktop)    */
+	0x16, 0x01, 0xF8,	/*      LOGICAL_MIN (-2047)             */
+	0x26, 0xFF, 0x07,	/*      LOGICAL_MAX (2047)              */
+	0x75, 0x0C,		/*      REPORT_SIZE (12)                */
+	0x95, 0x02,		/*      REPORT_COUNT (2)                */
+	0x09, 0x30,		/*      USAGE (X)                       */
+	0x09, 0x31,		/*      USAGE (Y)                       */
+	0x81, 0x06,		/*      INPUT                           */
+	0x15, 0x81,		/*      LOGICAL_MIN (-127)              */
+	0x25, 0x7F,		/*      LOGICAL_MAX (127)               */
+	0x75, 0x08,		/*      REPORT_SIZE (8)                 */
+	0x95, 0x01,		/*      REPORT_COUNT (1)                */
+	0x09, 0x38,		/*      USAGE (wheel)                   */
+	0x81, 0x06,		/*      INPUT                           */
+	0x05, 0x0C,		/*      USAGE_PAGE(consumer)            */
+	0x0A, 0x38, 0x02,	/*      USAGE(AC Pan)                   */
+	0x95, 0x01,		/*      REPORT_COUNT (1)                */
+	0x81, 0x06,		/*      INPUT                           */
+	0xC0,			/*    END_COLLECTION                    */
+	0xC0,			/*  END_COLLECTION                      */
+};
+
+/* Mouse descriptor (2) for Bluetooth receiver, low-res hwheel, 12 buttons */
+static const char mse_bluetooth_descriptor[] = {
+	0x05, 0x01,		/*  USAGE_PAGE (Generic Desktop)        */
+	0x09, 0x02,		/*  USAGE (Mouse)                       */
+	0xA1, 0x01,		/*  COLLECTION (Application)            */
+	0x85, 0x02,		/*    REPORT_ID = 2                     */
+	0x09, 0x01,		/*    USAGE (pointer)                   */
+	0xA1, 0x00,		/*    COLLECTION (physical)             */
+	0x05, 0x09,		/*      USAGE_PAGE (buttons)            */
+	0x19, 0x01,		/*      USAGE_MIN (1)                   */
+	0x29, 0x08,		/*      USAGE_MAX (8)                   */
+	0x15, 0x00,		/*      LOGICAL_MIN (0)                 */
+	0x25, 0x01,		/*      LOGICAL_MAX (1)                 */
+	0x95, 0x08,		/*      REPORT_COUNT (8)                */
+	0x75, 0x01,		/*      REPORT_SIZE (1)                 */
+	0x81, 0x02,		/*      INPUT (data var abs)            */
+	0x05, 0x01,		/*      USAGE_PAGE (generic desktop)    */
+	0x16, 0x01, 0xF8,	/*      LOGICAL_MIN (-2047)             */
+	0x26, 0xFF, 0x07,	/*      LOGICAL_MAX (2047)              */
+	0x75, 0x0C,		/*      REPORT_SIZE (12)                */
+	0x95, 0x02,		/*      REPORT_COUNT (2)                */
+	0x09, 0x30,		/*      USAGE (X)                       */
+	0x09, 0x31,		/*      USAGE (Y)                       */
+	0x81, 0x06,		/*      INPUT                           */
+	0x15, 0x81,		/*      LOGICAL_MIN (-127)              */
+	0x25, 0x7F,		/*      LOGICAL_MAX (127)               */
+	0x75, 0x08,		/*      REPORT_SIZE (8)                 */
+	0x95, 0x01,		/*      REPORT_COUNT (1)                */
+	0x09, 0x38,		/*      USAGE (wheel)                   */
+	0x81, 0x06,		/*      INPUT                           */
+	0x05, 0x0C,		/*      USAGE_PAGE(consumer)            */
+	0x0A, 0x38, 0x02,	/*      USAGE(AC Pan)                   */
+	0x15, 0xF9,		/*      LOGICAL_MIN (-7)                */
+	0x25, 0x07,		/*      LOGICAL_MAX (7)                 */
+	0x75, 0x04,		/*      REPORT_SIZE (4)                 */
+	0x95, 0x01,		/*      REPORT_COUNT (1)                */
+	0x81, 0x06,		/*      INPUT                           */
+	0x05, 0x09,		/*      USAGE_PAGE (buttons)            */
+	0x19, 0x09,		/*      USAGE_MIN (9)                   */
+	0x29, 0x0C,		/*      USAGE_MAX (12)                  */
+	0x15, 0x00,		/*      LOGICAL_MIN (0)                 */
+	0x25, 0x01,		/*      LOGICAL_MAX (1)                 */
+	0x75, 0x01,		/*      REPORT_SIZE (1)                 */
+	0x95, 0x04,		/*      REPORT_COUNT (4)                */
+	0x81, 0x06,		/*      INPUT                           */
+	0xC0,			/*    END_COLLECTION                    */
+	0xC0,			/*  END_COLLECTION                      */
+};
+
+/* Gaming Mouse descriptor (2) */
+static const char mse_high_res_descriptor[] = {
+	0x05, 0x01,		/*  USAGE_PAGE (Generic Desktop)        */
+	0x09, 0x02,		/*  USAGE (Mouse)                       */
+	0xA1, 0x01,		/*  COLLECTION (Application)            */
+	0x85, 0x02,		/*    REPORT_ID = 2                     */
+	0x09, 0x01,		/*    USAGE (pointer)                   */
+	0xA1, 0x00,		/*    COLLECTION (physical)             */
+	0x05, 0x09,		/*      USAGE_PAGE (buttons)            */
+	0x19, 0x01,		/*      USAGE_MIN (1)                   */
+	0x29, 0x10,		/*      USAGE_MAX (16)                  */
+	0x15, 0x00,		/*      LOGICAL_MIN (0)                 */
+	0x25, 0x01,		/*      LOGICAL_MAX (1)                 */
+	0x95, 0x10,		/*      REPORT_COUNT (16)               */
+	0x75, 0x01,		/*      REPORT_SIZE (1)                 */
+	0x81, 0x02,		/*      INPUT (data var abs)            */
+	0x05, 0x01,		/*      USAGE_PAGE (generic desktop)    */
+	0x16, 0x01, 0x80,	/*      LOGICAL_MIN (-32767)            */
+	0x26, 0xFF, 0x7F,	/*      LOGICAL_MAX (32767)             */
+	0x75, 0x10,		/*      REPORT_SIZE (16)                */
+	0x95, 0x02,		/*      REPORT_COUNT (2)                */
+	0x09, 0x30,		/*      USAGE (X)                       */
+	0x09, 0x31,		/*      USAGE (Y)                       */
+	0x81, 0x06,		/*      INPUT                           */
+	0x15, 0x81,		/*      LOGICAL_MIN (-127)              */
+	0x25, 0x7F,		/*      LOGICAL_MAX (127)               */
+	0x75, 0x08,		/*      REPORT_SIZE (8)                 */
+	0x95, 0x01,		/*      REPORT_COUNT (1)                */
+	0x09, 0x38,		/*      USAGE (wheel)                   */
+	0x81, 0x06,		/*      INPUT                           */
+	0x05, 0x0C,		/*      USAGE_PAGE(consumer)            */
+	0x0A, 0x38, 0x02,	/*      USAGE(AC Pan)                   */
+	0x95, 0x01,		/*      REPORT_COUNT (1)                */
+	0x81, 0x06,		/*      INPUT                           */
+	0xC0,			/*    END_COLLECTION                    */
+	0xC0,			/*  END_COLLECTION                      */
+};
+
 /* Consumer Control descriptor (3) */
 static const char consumer_descriptor[] = {
 	0x05, 0x0C,		/* USAGE_PAGE (Consumer Devices)       */
@@ -308,7 +479,7 @@ static const char hidpp_descriptor[] = {
 /* Make sure all descriptors are present here */
 #define MAX_RDESC_SIZE				\
 	(sizeof(kbd_descriptor) +		\
-	 sizeof(mse_descriptor) +		\
+	 sizeof(mse_bluetooth_descriptor) +	\
 	 sizeof(consumer_descriptor) +		\
 	 sizeof(syscontrol_descriptor) +	\
 	 sizeof(media_descriptor) +	\
@@ -341,51 +512,160 @@ static const u8 hid_reportid_size_map[NUMBER_OF_HID_REPORTS] = {
 static struct hid_ll_driver logi_dj_ll_driver;
 
 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev);
+static void delayedwork_callback(struct work_struct *work);
+
+static LIST_HEAD(dj_hdev_list);
+static DEFINE_MUTEX(dj_hdev_list_lock);
+
+/*
+ * dj/HID++ receivers are really a single logical entity, but for BIOS/Windows
+ * compatibility they have multiple USB interfaces. On HID++ receivers we need
+ * to listen for input reports on both interfaces. The functions below are used
+ * to create a single struct dj_receiver_dev for all interfaces belonging to
+ * a single USB-device / receiver.
+ */
+static struct dj_receiver_dev *dj_find_receiver_dev(struct hid_device *hdev,
+						    enum recvr_type type)
+{
+	struct dj_receiver_dev *djrcv_dev;
+	char sep;
+
+	/*
+	 * The bluetooth receiver contains a built-in hub and has separate
+	 * USB-devices for the keyboard and mouse interfaces.
+	 */
+	sep = (type == recvr_type_bluetooth) ? '.' : '/';
+
+	/* Try to find an already-probed interface from the same device */
+	list_for_each_entry(djrcv_dev, &dj_hdev_list, list) {
+		if (djrcv_dev->mouse &&
+		    hid_compare_device_paths(hdev, djrcv_dev->mouse, sep)) {
+			kref_get(&djrcv_dev->kref);
+			return djrcv_dev;
+		}
+		if (djrcv_dev->keyboard &&
+		    hid_compare_device_paths(hdev, djrcv_dev->keyboard, sep)) {
+			kref_get(&djrcv_dev->kref);
+			return djrcv_dev;
+		}
+		if (djrcv_dev->hidpp &&
+		    hid_compare_device_paths(hdev, djrcv_dev->hidpp, sep)) {
+			kref_get(&djrcv_dev->kref);
+			return djrcv_dev;
+		}
+	}
+
+	return NULL;
+}
+
+static void dj_release_receiver_dev(struct kref *kref)
+{
+	struct dj_receiver_dev *djrcv_dev = container_of(kref, struct dj_receiver_dev, kref);
+
+	list_del(&djrcv_dev->list);
+	kfifo_free(&djrcv_dev->notif_fifo);
+	kfree(djrcv_dev);
+}
+
+static void dj_put_receiver_dev(struct hid_device *hdev)
+{
+	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
+
+	mutex_lock(&dj_hdev_list_lock);
+
+	if (djrcv_dev->mouse == hdev)
+		djrcv_dev->mouse = NULL;
+	if (djrcv_dev->keyboard == hdev)
+		djrcv_dev->keyboard = NULL;
+	if (djrcv_dev->hidpp == hdev)
+		djrcv_dev->hidpp = NULL;
+
+	kref_put(&djrcv_dev->kref, dj_release_receiver_dev);
+
+	mutex_unlock(&dj_hdev_list_lock);
+}
+
+static struct dj_receiver_dev *dj_get_receiver_dev(struct hid_device *hdev,
+						   enum recvr_type type,
+						   unsigned int application,
+						   bool is_hidpp)
+{
+	struct dj_receiver_dev *djrcv_dev;
+
+	mutex_lock(&dj_hdev_list_lock);
+
+	djrcv_dev = dj_find_receiver_dev(hdev, type);
+	if (!djrcv_dev) {
+		djrcv_dev = kzalloc(sizeof(*djrcv_dev), GFP_KERNEL);
+		if (!djrcv_dev)
+			goto out;
+
+		INIT_WORK(&djrcv_dev->work, delayedwork_callback);
+		spin_lock_init(&djrcv_dev->lock);
+		if (kfifo_alloc(&djrcv_dev->notif_fifo,
+			    DJ_MAX_NUMBER_NOTIFS * sizeof(struct dj_workitem),
+			    GFP_KERNEL)) {
+			kfree(djrcv_dev);
+			djrcv_dev = NULL;
+			goto out;
+		}
+		kref_init(&djrcv_dev->kref);
+		list_add_tail(&djrcv_dev->list, &dj_hdev_list);
+		djrcv_dev->last_query = jiffies;
+		djrcv_dev->type = type;
+	}
+
+	if (application == HID_GD_KEYBOARD)
+		djrcv_dev->keyboard = hdev;
+	if (application == HID_GD_MOUSE)
+		djrcv_dev->mouse = hdev;
+	if (is_hidpp)
+		djrcv_dev->hidpp = hdev;
+
+	hid_set_drvdata(hdev, djrcv_dev);
+out:
+	mutex_unlock(&dj_hdev_list_lock);
+	return djrcv_dev;
+}
 
 static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev *djrcv_dev,
-						struct dj_report *dj_report)
+					      struct dj_workitem *workitem)
 {
 	/* Called in delayed work context */
 	struct dj_device *dj_dev;
 	unsigned long flags;
 
 	spin_lock_irqsave(&djrcv_dev->lock, flags);
-	dj_dev = djrcv_dev->paired_dj_devices[dj_report->device_index];
-	djrcv_dev->paired_dj_devices[dj_report->device_index] = NULL;
+	dj_dev = djrcv_dev->paired_dj_devices[workitem->device_index];
+	djrcv_dev->paired_dj_devices[workitem->device_index] = NULL;
 	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
 
 	if (dj_dev != NULL) {
 		hid_destroy_device(dj_dev->hdev);
 		kfree(dj_dev);
 	} else {
-		dev_err(&djrcv_dev->hdev->dev, "%s: can't destroy a NULL device\n",
+		hid_err(djrcv_dev->hidpp, "%s: can't destroy a NULL device\n",
 			__func__);
 	}
 }
 
 static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
-					  struct dj_report *dj_report)
+					  struct dj_workitem *workitem)
 {
 	/* Called in delayed work context */
-	struct hid_device *djrcv_hdev = djrcv_dev->hdev;
-	struct usb_interface *intf = to_usb_interface(djrcv_hdev->dev.parent);
-	struct usb_device *usbdev = interface_to_usbdev(intf);
+	struct hid_device *djrcv_hdev = djrcv_dev->hidpp;
 	struct hid_device *dj_hiddev;
 	struct dj_device *dj_dev;
+	u8 device_index = workitem->device_index;
+	unsigned long flags;
 
 	/* Device index goes from 1 to 6, we need 3 bytes to store the
 	 * semicolon, the index, and a null terminator
 	 */
 	unsigned char tmpstr[3];
 
-	if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] &
-	    SPFUNCTION_DEVICE_LIST_EMPTY) {
-		dbg_hid("%s: device list is empty\n", __func__);
-		djrcv_dev->querying_devices = false;
-		return;
-	}
-
-	if (djrcv_dev->paired_dj_devices[dj_report->device_index]) {
+	/* We are the only one ever adding a device, no need to lock */
+	if (djrcv_dev->paired_dj_devices[device_index]) {
 		/* The device is already known. No need to reallocate it. */
 		dbg_hid("%s: device is already known\n", __func__);
 		return;
@@ -393,8 +673,7 @@ static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
 
 	dj_hiddev = hid_allocate_device();
 	if (IS_ERR(dj_hiddev)) {
-		dev_err(&djrcv_hdev->dev, "%s: hid_allocate_device failed\n",
-			__func__);
+		hid_err(djrcv_hdev, "%s: hid_allocate_dev failed\n", __func__);
 		return;
 	}
 
@@ -402,48 +681,67 @@ static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
 
 	dj_hiddev->dev.parent = &djrcv_hdev->dev;
 	dj_hiddev->bus = BUS_USB;
-	dj_hiddev->vendor = le16_to_cpu(usbdev->descriptor.idVendor);
-	dj_hiddev->product =
-		(dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB]
-									<< 8) |
-		dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB];
-	snprintf(dj_hiddev->name, sizeof(dj_hiddev->name),
-		"Logitech Unifying Device. Wireless PID:%04x",
-		dj_hiddev->product);
-
-	dj_hiddev->group = HID_GROUP_LOGITECH_DJ_DEVICE;
-
-	usb_make_path(usbdev, dj_hiddev->phys, sizeof(dj_hiddev->phys));
-	snprintf(tmpstr, sizeof(tmpstr), ":%d", dj_report->device_index);
+	dj_hiddev->vendor = djrcv_hdev->vendor;
+	dj_hiddev->product = (workitem->quad_id_msb << 8) |
+			      workitem->quad_id_lsb;
+	if (workitem->device_type) {
+		const char *type_str = "Device";
+
+		switch (workitem->device_type) {
+		case 0x01: type_str = "Keyboard";	break;
+		case 0x02: type_str = "Mouse";		break;
+		case 0x03: type_str = "Numpad";		break;
+		case 0x04: type_str = "Presenter";	break;
+		case 0x07: type_str = "Remote Control";	break;
+		case 0x08: type_str = "Trackball";	break;
+		case 0x09: type_str = "Touchpad";	break;
+		}
+		snprintf(dj_hiddev->name, sizeof(dj_hiddev->name),
+			"Logitech Wireless %s PID:%04x",
+			type_str, dj_hiddev->product);
+	} else {
+		snprintf(dj_hiddev->name, sizeof(dj_hiddev->name),
+			"Logitech Unifying Device. Wireless PID:%04x",
+			dj_hiddev->product);
+	}
+
+	if (djrcv_dev->type == recvr_type_27mhz)
+		dj_hiddev->group = HID_GROUP_LOGITECH_27MHZ_DEVICE;
+	else
+		dj_hiddev->group = HID_GROUP_LOGITECH_DJ_DEVICE;
+
+	memcpy(dj_hiddev->phys, djrcv_hdev->phys, sizeof(djrcv_hdev->phys));
+	snprintf(tmpstr, sizeof(tmpstr), ":%d", device_index);
 	strlcat(dj_hiddev->phys, tmpstr, sizeof(dj_hiddev->phys));
 
 	dj_dev = kzalloc(sizeof(struct dj_device), GFP_KERNEL);
 
 	if (!dj_dev) {
-		dev_err(&djrcv_hdev->dev, "%s: failed allocating dj_device\n",
-			__func__);
+		hid_err(djrcv_hdev, "%s: failed allocating dj_dev\n", __func__);
 		goto dj_device_allocate_fail;
 	}
 
-	dj_dev->reports_supported = get_unaligned_le32(
-		dj_report->report_params + DEVICE_PAIRED_RF_REPORT_TYPE);
+	dj_dev->reports_supported = workitem->reports_supported;
 	dj_dev->hdev = dj_hiddev;
 	dj_dev->dj_receiver_dev = djrcv_dev;
-	dj_dev->device_index = dj_report->device_index;
+	dj_dev->device_index = device_index;
 	dj_hiddev->driver_data = dj_dev;
 
-	djrcv_dev->paired_dj_devices[dj_report->device_index] = dj_dev;
+	spin_lock_irqsave(&djrcv_dev->lock, flags);
+	djrcv_dev->paired_dj_devices[device_index] = dj_dev;
+	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
 
 	if (hid_add_device(dj_hiddev)) {
-		dev_err(&djrcv_hdev->dev, "%s: failed adding dj_device\n",
-			__func__);
+		hid_err(djrcv_hdev, "%s: failed adding dj_device\n", __func__);
 		goto hid_add_device_fail;
 	}
 
 	return;
 
 hid_add_device_fail:
-	djrcv_dev->paired_dj_devices[dj_report->device_index] = NULL;
+	spin_lock_irqsave(&djrcv_dev->lock, flags);
+	djrcv_dev->paired_dj_devices[device_index] = NULL;
+	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
 	kfree(dj_dev);
 dj_device_allocate_fail:
 	hid_destroy_device(dj_hiddev);
@@ -454,7 +752,7 @@ static void delayedwork_callback(struct work_struct *work)
 	struct dj_receiver_dev *djrcv_dev =
 		container_of(work, struct dj_receiver_dev, work);
 
-	struct dj_report dj_report;
+	struct dj_workitem workitem;
 	unsigned long flags;
 	int count;
 	int retval;
@@ -463,67 +761,234 @@ static void delayedwork_callback(struct work_struct *work)
 
 	spin_lock_irqsave(&djrcv_dev->lock, flags);
 
-	count = kfifo_out(&djrcv_dev->notif_fifo, &dj_report,
-				sizeof(struct dj_report));
-
-	if (count != sizeof(struct dj_report)) {
-		dev_err(&djrcv_dev->hdev->dev, "%s: workitem triggered without "
-			"notifications available\n", __func__);
+	/*
+	 * Since we attach to multiple interfaces, we may get scheduled before
+	 * we are bound to the HID++ interface, catch this.
+	 */
+	if (!djrcv_dev->ready) {
+		pr_warn("%s: delayedwork queued before hidpp interface was enumerated\n",
+			__func__);
 		spin_unlock_irqrestore(&djrcv_dev->lock, flags);
 		return;
 	}
 
-	if (!kfifo_is_empty(&djrcv_dev->notif_fifo)) {
-		if (schedule_work(&djrcv_dev->work) == 0) {
-			dbg_hid("%s: did not schedule the work item, was "
-				"already queued\n", __func__);
-		}
+	count = kfifo_out(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
+
+	if (count != sizeof(workitem)) {
+		spin_unlock_irqrestore(&djrcv_dev->lock, flags);
+		return;
 	}
 
+	if (!kfifo_is_empty(&djrcv_dev->notif_fifo))
+		schedule_work(&djrcv_dev->work);
+
 	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
 
-	switch (dj_report.report_type) {
-	case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
-		logi_dj_recv_add_djhid_device(djrcv_dev, &dj_report);
+	switch (workitem.type) {
+	case WORKITEM_TYPE_PAIRED:
+		logi_dj_recv_add_djhid_device(djrcv_dev, &workitem);
 		break;
-	case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
-		logi_dj_recv_destroy_djhid_device(djrcv_dev, &dj_report);
+	case WORKITEM_TYPE_UNPAIRED:
+		logi_dj_recv_destroy_djhid_device(djrcv_dev, &workitem);
 		break;
-	default:
-	/* A normal report (i. e. not belonging to a pair/unpair notification)
-	 * arriving here, means that the report arrived but we did not have a
-	 * paired dj_device associated to the report's device_index, this
-	 * means that the original "device paired" notification corresponding
-	 * to this dj_device never arrived to this driver. The reason is that
-	 * hid-core discards all packets coming from a device while probe() is
-	 * executing. */
-	if (!djrcv_dev->paired_dj_devices[dj_report.device_index]) {
-		/* ok, we don't know the device, just re-ask the
-		 * receiver for the list of connected devices. */
+	case WORKITEM_TYPE_UNKNOWN:
 		retval = logi_dj_recv_query_paired_devices(djrcv_dev);
-		if (!retval) {
-			/* everything went fine, so just leave */
-			break;
-		}
-		dev_err(&djrcv_dev->hdev->dev,
-			"%s:logi_dj_recv_query_paired_devices "
-			"error:%d\n", __func__, retval);
+		if (retval) {
+			hid_err(djrcv_dev->hidpp, "%s: logi_dj_recv_query_paired_devices error: %d\n",
+				__func__, retval);
 		}
-		dbg_hid("%s: unexpected report type\n", __func__);
+		break;
+	case WORKITEM_TYPE_EMPTY:
+		dbg_hid("%s: device list is empty\n", __func__);
+		break;
 	}
 }
 
+/*
+ * Sometimes we receive reports for which we do not have a paired dj_device
+ * associated with the device_index or report-type to forward the report to.
+ * This means that the original "device paired" notification corresponding
+ * to the dj_device never arrived to this driver. Possible reasons for this are:
+ * 1) hid-core discards all packets coming from a device during probe().
+ * 2) if the receiver is plugged into a KVM switch then the pairing reports
+ * are only forwarded to it if the focus is on this PC.
+ * This function deals with this by re-asking the receiver for the list of
+ * connected devices in the delayed work callback.
+ * This function MUST be called with djrcv->lock held.
+ */
+static void logi_dj_recv_queue_unknown_work(struct dj_receiver_dev *djrcv_dev)
+{
+	struct dj_workitem workitem = { .type = WORKITEM_TYPE_UNKNOWN };
+
+	/* Rate limit queries done because of unhandeled reports to 2/sec */
+	if (time_before(jiffies, djrcv_dev->last_query + HZ / 2))
+		return;
+
+	kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
+	schedule_work(&djrcv_dev->work);
+}
+
 static void logi_dj_recv_queue_notification(struct dj_receiver_dev *djrcv_dev,
 					   struct dj_report *dj_report)
 {
 	/* We are called from atomic context (tasklet && djrcv->lock held) */
+	struct dj_workitem workitem = {
+		.device_index = dj_report->device_index,
+	};
+
+	switch (dj_report->report_type) {
+	case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
+		workitem.type = WORKITEM_TYPE_PAIRED;
+		if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] &
+		    SPFUNCTION_DEVICE_LIST_EMPTY) {
+			workitem.type = WORKITEM_TYPE_EMPTY;
+			break;
+		}
+		/* fall-through */
+	case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
+		workitem.quad_id_msb =
+			dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB];
+		workitem.quad_id_lsb =
+			dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB];
+		workitem.reports_supported = get_unaligned_le32(
+						dj_report->report_params +
+						DEVICE_PAIRED_RF_REPORT_TYPE);
+		workitem.reports_supported |= HIDPP;
+		if (dj_report->report_type == REPORT_TYPE_NOTIF_DEVICE_UNPAIRED)
+			workitem.type = WORKITEM_TYPE_UNPAIRED;
+		break;
+	default:
+		logi_dj_recv_queue_unknown_work(djrcv_dev);
+		return;
+	}
 
-	kfifo_in(&djrcv_dev->notif_fifo, dj_report, sizeof(struct dj_report));
+	kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
+	schedule_work(&djrcv_dev->work);
+}
+
+static void logi_hidpp_dev_conn_notif_equad(struct hid_device *hdev,
+					    struct hidpp_event *hidpp_report,
+					    struct dj_workitem *workitem)
+{
+	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
+
+	workitem->type = WORKITEM_TYPE_PAIRED;
+	workitem->device_type = hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] &
+				HIDPP_DEVICE_TYPE_MASK;
+	workitem->quad_id_msb = hidpp_report->params[HIDPP_PARAM_EQUAD_MSB];
+	workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_EQUAD_LSB];
+	switch (workitem->device_type) {
+	case REPORT_TYPE_KEYBOARD:
+		workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA |
+					       POWER_KEYS | MEDIA_CENTER |
+					       HIDPP;
+		break;
+	case REPORT_TYPE_MOUSE:
+		workitem->reports_supported |= STD_MOUSE | HIDPP;
+		if (djrcv_dev->type == recvr_type_mouse_only)
+			workitem->reports_supported |= MULTIMEDIA;
+		break;
+	}
+}
+
+static void logi_hidpp_dev_conn_notif_27mhz(struct hid_device *hdev,
+					    struct hidpp_event *hidpp_report,
+					    struct dj_workitem *workitem)
+{
+	workitem->type = WORKITEM_TYPE_PAIRED;
+	workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID];
+	switch (hidpp_report->device_index) {
+	case 1: /* Index 1 is always a mouse */
+	case 2: /* Index 2 is always a mouse */
+		workitem->device_type = HIDPP_DEVICE_TYPE_MOUSE;
+		workitem->reports_supported |= STD_MOUSE | HIDPP;
+		break;
+	case 3: /* Index 3 is always the keyboard */
+	case 4: /* Index 4 is used for an optional separate numpad */
+		workitem->device_type = HIDPP_DEVICE_TYPE_KEYBOARD;
+		workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA |
+					       POWER_KEYS | HIDPP;
+		break;
+	default:
+		hid_warn(hdev, "%s: unexpected device-index %d", __func__,
+			 hidpp_report->device_index);
+	}
+}
+
+static void logi_hidpp_recv_queue_notif(struct hid_device *hdev,
+					struct hidpp_event *hidpp_report)
+{
+	/* We are called from atomic context (tasklet && djrcv->lock held) */
+	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
+	const char *device_type = "UNKNOWN";
+	struct dj_workitem workitem = {
+		.type = WORKITEM_TYPE_EMPTY,
+		.device_index = hidpp_report->device_index,
+	};
+
+	switch (hidpp_report->params[HIDPP_PARAM_PROTO_TYPE]) {
+	case 0x01:
+		device_type = "Bluetooth";
+		/* Bluetooth connect packet contents is the same as (e)QUAD */
+		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
+		if (!(hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] &
+						HIDPP_MANUFACTURER_MASK)) {
+			hid_info(hdev, "Non Logitech device connected on slot %d\n",
+				 hidpp_report->device_index);
+			workitem.reports_supported &= ~HIDPP;
+		}
+		break;
+	case 0x02:
+		device_type = "27 Mhz";
+		logi_hidpp_dev_conn_notif_27mhz(hdev, hidpp_report, &workitem);
+		break;
+	case 0x03:
+		device_type = "QUAD or eQUAD";
+		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
+		break;
+	case 0x04:
+		device_type = "eQUAD step 4 DJ";
+		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
+		break;
+	case 0x05:
+		device_type = "DFU Lite";
+		break;
+	case 0x06:
+		device_type = "eQUAD step 4 Lite";
+		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
+		break;
+	case 0x07:
+		device_type = "eQUAD step 4 Gaming";
+		break;
+	case 0x08:
+		device_type = "eQUAD step 4 for gamepads";
+		break;
+	case 0x0a:
+		device_type = "eQUAD nano Lite";
+		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
+		break;
+	case 0x0c:
+		device_type = "eQUAD Lightspeed";
+		logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem);
+		workitem.reports_supported |= STD_KEYBOARD;
+		break;
+	}
 
-	if (schedule_work(&djrcv_dev->work) == 0) {
-		dbg_hid("%s: did not schedule the work item, was already "
-			"queued\n", __func__);
+	if (workitem.type == WORKITEM_TYPE_EMPTY) {
+		hid_warn(hdev,
+			 "unusable device of type %s (0x%02x) connected on slot %d",
+			 device_type,
+			 hidpp_report->params[HIDPP_PARAM_PROTO_TYPE],
+			 hidpp_report->device_index);
+		return;
 	}
+
+	hid_info(hdev, "device of type %s (0x%02x) connected on slot %d",
+		 device_type, hidpp_report->params[HIDPP_PARAM_PROTO_TYPE],
+		 hidpp_report->device_index);
+
+	kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
+	schedule_work(&djrcv_dev->work);
 }
 
 static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev,
@@ -552,8 +1017,8 @@ static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev,
 	}
 }
 
-static void logi_dj_recv_forward_report(struct dj_receiver_dev *djrcv_dev,
-					struct dj_report *dj_report)
+static void logi_dj_recv_forward_dj(struct dj_receiver_dev *djrcv_dev,
+				    struct dj_report *dj_report)
 {
 	/* We are called from atomic context (tasklet && djrcv->lock held) */
 	struct dj_device *dj_device;
@@ -573,18 +1038,48 @@ static void logi_dj_recv_forward_report(struct dj_receiver_dev *djrcv_dev,
 	}
 }
 
-static void logi_dj_recv_forward_hidpp(struct dj_device *dj_dev, u8 *data,
-				       int size)
+static void logi_dj_recv_forward_report(struct dj_device *dj_dev, u8 *data,
+					int size)
 {
 	/* We are called from atomic context (tasklet && djrcv->lock held) */
 	if (hid_input_report(dj_dev->hdev, HID_INPUT_REPORT, data, size, 1))
 		dbg_hid("hid_input_report error\n");
 }
 
+static void logi_dj_recv_forward_input_report(struct hid_device *hdev,
+					      u8 *data, int size)
+{
+	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
+	struct dj_device *dj_dev;
+	unsigned long flags;
+	u8 report = data[0];
+	int i;
+
+	if (report > REPORT_TYPE_RFREPORT_LAST) {
+		hid_err(hdev, "Unexpected input report number %d\n", report);
+		return;
+	}
+
+	spin_lock_irqsave(&djrcv_dev->lock, flags);
+	for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) {
+		dj_dev = djrcv_dev->paired_dj_devices[i];
+		if (dj_dev && (dj_dev->reports_supported & BIT(report))) {
+			logi_dj_recv_forward_report(dj_dev, data, size);
+			spin_unlock_irqrestore(&djrcv_dev->lock, flags);
+			return;
+		}
+	}
+
+	logi_dj_recv_queue_unknown_work(djrcv_dev);
+	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
+
+	dbg_hid("No dj-devs handling input report number %d\n", report);
+}
+
 static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev,
 				    struct dj_report *dj_report)
 {
-	struct hid_device *hdev = djrcv_dev->hdev;
+	struct hid_device *hdev = djrcv_dev->hidpp;
 	struct hid_report *report;
 	struct hid_report_enum *output_report_enum;
 	u8 *data = (u8 *)(&dj_report->device_index);
@@ -594,7 +1089,7 @@ static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev,
 	report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT];
 
 	if (!report) {
-		dev_err(&hdev->dev, "%s: unable to find dj report\n", __func__);
+		hid_err(hdev, "%s: unable to find dj report\n", __func__);
 		return -ENODEV;
 	}
 
@@ -606,14 +1101,40 @@ static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev,
 	return 0;
 }
 
+static int logi_dj_recv_query_hidpp_devices(struct dj_receiver_dev *djrcv_dev)
+{
+	const u8 template[] = {REPORT_ID_HIDPP_SHORT,
+			       HIDPP_RECEIVER_INDEX,
+			       HIDPP_SET_REGISTER,
+			       HIDPP_REG_CONNECTION_STATE,
+			       HIDPP_FAKE_DEVICE_ARRIVAL,
+			       0x00, 0x00};
+	u8 *hidpp_report;
+	int retval;
+
+	hidpp_report = kmemdup(template, sizeof(template), GFP_KERNEL);
+	if (!hidpp_report)
+		return -ENOMEM;
+
+	retval = hid_hw_raw_request(djrcv_dev->hidpp,
+				    REPORT_ID_HIDPP_SHORT,
+				    hidpp_report, sizeof(template),
+				    HID_OUTPUT_REPORT,
+				    HID_REQ_SET_REPORT);
+
+	kfree(hidpp_report);
+	return 0;
+}
+
 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev)
 {
 	struct dj_report *dj_report;
 	int retval;
 
-	/* no need to protect djrcv_dev->querying_devices */
-	if (djrcv_dev->querying_devices)
-		return 0;
+	djrcv_dev->last_query = jiffies;
+
+	if (djrcv_dev->type != recvr_type_dj)
+		return logi_dj_recv_query_hidpp_devices(djrcv_dev);
 
 	dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
 	if (!dj_report)
@@ -630,27 +1151,33 @@ static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev)
 static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev,
 					  unsigned timeout)
 {
-	struct hid_device *hdev = djrcv_dev->hdev;
+	struct hid_device *hdev = djrcv_dev->hidpp;
 	struct dj_report *dj_report;
 	u8 *buf;
-	int retval;
+	int retval = 0;
 
 	dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
 	if (!dj_report)
 		return -ENOMEM;
-	dj_report->report_id = REPORT_ID_DJ_SHORT;
-	dj_report->device_index = 0xFF;
-	dj_report->report_type = REPORT_TYPE_CMD_SWITCH;
-	dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F;
-	dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] = (u8)timeout;
-	retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
 
-	/*
-	 * Ugly sleep to work around a USB 3.0 bug when the receiver is still
-	 * processing the "switch-to-dj" command while we send an other command.
-	 * 50 msec should gives enough time to the receiver to be ready.
-	 */
-	msleep(50);
+	if (djrcv_dev->type == recvr_type_dj) {
+		dj_report->report_id = REPORT_ID_DJ_SHORT;
+		dj_report->device_index = 0xFF;
+		dj_report->report_type = REPORT_TYPE_CMD_SWITCH;
+		dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F;
+		dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] =
+								(u8)timeout;
+
+		retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
+
+		/*
+		 * Ugly sleep to work around a USB 3.0 bug when the receiver is
+		 * still processing the "switch-to-dj" command while we send an
+		 * other command.
+		 * 50 msec should gives enough time to the receiver to be ready.
+		 */
+		msleep(50);
+	}
 
 	/*
 	 * Magical bits to set up hidpp notifications when the dj devices
@@ -682,22 +1209,28 @@ static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev,
 
 static int logi_dj_ll_open(struct hid_device *hid)
 {
-	dbg_hid("%s:%s\n", __func__, hid->phys);
+	dbg_hid("%s: %s\n", __func__, hid->phys);
 	return 0;
 
 }
 
 static void logi_dj_ll_close(struct hid_device *hid)
 {
-	dbg_hid("%s:%s\n", __func__, hid->phys);
+	dbg_hid("%s: %s\n", __func__, hid->phys);
 }
 
 /*
  * Register 0xB5 is "pairing information". It is solely intended for the
  * receiver, so do not overwrite the device index.
  */
-static u8 unifying_pairing_query[]  = {0x10, 0xff, 0x83, 0xb5};
-static u8 unifying_pairing_answer[] = {0x11, 0xff, 0x83, 0xb5};
+static u8 unifying_pairing_query[]  = { REPORT_ID_HIDPP_SHORT,
+					HIDPP_RECEIVER_INDEX,
+					HIDPP_GET_LONG_REGISTER,
+					HIDPP_REG_PAIRING_INFORMATION };
+static u8 unifying_pairing_answer[] = { REPORT_ID_HIDPP_LONG,
+					HIDPP_RECEIVER_INDEX,
+					HIDPP_GET_LONG_REGISTER,
+					HIDPP_REG_PAIRING_INFORMATION };
 
 static int logi_dj_ll_raw_request(struct hid_device *hid,
 				  unsigned char reportnum, __u8 *buf,
@@ -710,7 +1243,8 @@ static int logi_dj_ll_raw_request(struct hid_device *hid,
 	int ret;
 
 	if ((buf[0] == REPORT_ID_HIDPP_SHORT) ||
-	    (buf[0] == REPORT_ID_HIDPP_LONG)) {
+	    (buf[0] == REPORT_ID_HIDPP_LONG) ||
+	    (buf[0] == REPORT_ID_HIDPP_VERY_LONG)) {
 		if (count < 2)
 			return -EINVAL;
 
@@ -721,13 +1255,23 @@ static int logi_dj_ll_raw_request(struct hid_device *hid,
 			buf[4] = (buf[4] & 0xf0) | (djdev->device_index - 1);
 		else
 			buf[1] = djdev->device_index;
-		return hid_hw_raw_request(djrcv_dev->hdev, reportnum, buf,
+		return hid_hw_raw_request(djrcv_dev->hidpp, reportnum, buf,
 				count, report_type, reqtype);
 	}
 
 	if (buf[0] != REPORT_TYPE_LEDS)
 		return -EINVAL;
 
+	if (djrcv_dev->type != recvr_type_dj && count >= 2) {
+		if (!djrcv_dev->keyboard) {
+			hid_warn(hid, "Received REPORT_TYPE_LEDS request before the keyboard interface was enumerated\n");
+			return 0;
+		}
+		/* usbhid overrides the report ID and ignores the first byte */
+		return hid_hw_raw_request(djrcv_dev->keyboard, 0, buf, count,
+					  report_type, reqtype);
+	}
+
 	out_buf = kzalloc(DJREPORT_SHORT_LENGTH, GFP_ATOMIC);
 	if (!out_buf)
 		return -ENOMEM;
@@ -739,7 +1283,7 @@ static int logi_dj_ll_raw_request(struct hid_device *hid,
 	out_buf[1] = djdev->device_index;
 	memcpy(out_buf + 2, buf, count);
 
-	ret = hid_hw_raw_request(djrcv_dev->hdev, out_buf[0], out_buf,
+	ret = hid_hw_raw_request(djrcv_dev->hidpp, out_buf[0], out_buf,
 		DJREPORT_SHORT_LENGTH, report_type, reqtype);
 
 	kfree(out_buf);
@@ -769,41 +1313,56 @@ static int logi_dj_ll_parse(struct hid_device *hid)
 		return -ENOMEM;
 
 	if (djdev->reports_supported & STD_KEYBOARD) {
-		dbg_hid("%s: sending a kbd descriptor, reports_supported: %x\n",
+		dbg_hid("%s: sending a kbd descriptor, reports_supported: %llx\n",
 			__func__, djdev->reports_supported);
 		rdcat(rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor));
 	}
 
 	if (djdev->reports_supported & STD_MOUSE) {
-		dbg_hid("%s: sending a mouse descriptor, reports_supported: "
-			"%x\n", __func__, djdev->reports_supported);
-		rdcat(rdesc, &rsize, mse_descriptor, sizeof(mse_descriptor));
+		dbg_hid("%s: sending a mouse descriptor, reports_supported: %llx\n",
+			__func__, djdev->reports_supported);
+		if (djdev->dj_receiver_dev->type == recvr_type_gaming_hidpp ||
+		    djdev->dj_receiver_dev->type == recvr_type_mouse_only)
+			rdcat(rdesc, &rsize, mse_high_res_descriptor,
+			      sizeof(mse_high_res_descriptor));
+		else if (djdev->dj_receiver_dev->type == recvr_type_27mhz)
+			rdcat(rdesc, &rsize, mse_27mhz_descriptor,
+			      sizeof(mse_27mhz_descriptor));
+		else if (djdev->dj_receiver_dev->type == recvr_type_bluetooth)
+			rdcat(rdesc, &rsize, mse_bluetooth_descriptor,
+			      sizeof(mse_bluetooth_descriptor));
+		else
+			rdcat(rdesc, &rsize, mse_descriptor,
+			      sizeof(mse_descriptor));
 	}
 
 	if (djdev->reports_supported & MULTIMEDIA) {
-		dbg_hid("%s: sending a multimedia report descriptor: %x\n",
+		dbg_hid("%s: sending a multimedia report descriptor: %llx\n",
 			__func__, djdev->reports_supported);
 		rdcat(rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor));
 	}
 
 	if (djdev->reports_supported & POWER_KEYS) {
-		dbg_hid("%s: sending a power keys report descriptor: %x\n",
+		dbg_hid("%s: sending a power keys report descriptor: %llx\n",
 			__func__, djdev->reports_supported);
 		rdcat(rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor));
 	}
 
 	if (djdev->reports_supported & MEDIA_CENTER) {
-		dbg_hid("%s: sending a media center report descriptor: %x\n",
+		dbg_hid("%s: sending a media center report descriptor: %llx\n",
 			__func__, djdev->reports_supported);
 		rdcat(rdesc, &rsize, media_descriptor, sizeof(media_descriptor));
 	}
 
 	if (djdev->reports_supported & KBD_LEDS) {
-		dbg_hid("%s: need to send kbd leds report descriptor: %x\n",
+		dbg_hid("%s: need to send kbd leds report descriptor: %llx\n",
 			__func__, djdev->reports_supported);
 	}
 
-	rdcat(rdesc, &rsize, hidpp_descriptor, sizeof(hidpp_descriptor));
+	if (djdev->reports_supported & HIDPP) {
+		rdcat(rdesc, &rsize, hidpp_descriptor,
+		      sizeof(hidpp_descriptor));
+	}
 
 	retval = hid_parse_report(hid, rdesc, rsize);
 	kfree(rdesc);
@@ -866,7 +1425,7 @@ static int logi_dj_dj_event(struct hid_device *hdev,
 		 * so ignore those reports too.
 		 */
 		if (dj_report->device_index != DJ_RECEIVER_INDEX)
-			dev_err(&hdev->dev, "%s: invalid device index:%d\n",
+			hid_err(hdev, "%s: invalid device index:%d\n",
 				__func__, dj_report->device_index);
 		return false;
 	}
@@ -893,7 +1452,7 @@ static int logi_dj_dj_event(struct hid_device *hdev,
 		}
 		break;
 	default:
-		logi_dj_recv_forward_report(djrcv_dev, dj_report);
+		logi_dj_recv_forward_dj(djrcv_dev, dj_report);
 	}
 
 out:
@@ -907,9 +1466,10 @@ static int logi_dj_hidpp_event(struct hid_device *hdev,
 			     int size)
 {
 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
-	struct dj_report *dj_report = (struct dj_report *) data;
+	struct hidpp_event *hidpp_report = (struct hidpp_event *) data;
+	struct dj_device *dj_dev;
 	unsigned long flags;
-	u8 device_index = dj_report->device_index;
+	u8 device_index = hidpp_report->device_index;
 
 	if (device_index == HIDPP_RECEIVER_INDEX) {
 		/* special case were the device wants to know its unifying
@@ -937,21 +1497,42 @@ static int logi_dj_hidpp_event(struct hid_device *hdev,
 		 * This driver can ignore safely the receiver notifications,
 		 * so ignore those reports too.
 		 */
-		dev_err(&hdev->dev, "%s: invalid device index:%d\n",
-				__func__, dj_report->device_index);
+		hid_err(hdev, "%s: invalid device index:%d\n", __func__,
+			hidpp_report->device_index);
 		return false;
 	}
 
 	spin_lock_irqsave(&djrcv_dev->lock, flags);
 
-	if (!djrcv_dev->paired_dj_devices[device_index])
-		/* received an event for an unknown device, bail out */
-		goto out;
+	dj_dev = djrcv_dev->paired_dj_devices[device_index];
+
+	/*
+	 * With 27 MHz receivers, we do not get an explicit unpair event,
+	 * remove the old device if the user has paired a *different* device.
+	 */
+	if (djrcv_dev->type == recvr_type_27mhz && dj_dev &&
+	    hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED &&
+	    hidpp_report->params[HIDPP_PARAM_PROTO_TYPE] == 0x02 &&
+	    hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID] !=
+						dj_dev->hdev->product) {
+		struct dj_workitem workitem = {
+			.device_index = hidpp_report->device_index,
+			.type = WORKITEM_TYPE_UNPAIRED,
+		};
+		kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem));
+		/* logi_hidpp_recv_queue_notif will queue the work */
+		dj_dev = NULL;
+	}
 
-	logi_dj_recv_forward_hidpp(djrcv_dev->paired_dj_devices[device_index],
-				   data, size);
+	if (dj_dev) {
+		logi_dj_recv_forward_report(dj_dev, data, size);
+	} else {
+		if (hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED)
+			logi_hidpp_recv_queue_notif(hdev, hidpp_report);
+		else
+			logi_dj_recv_queue_unknown_work(djrcv_dev);
+	}
 
-out:
 	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
 
 	return false;
@@ -961,112 +1542,181 @@ static int logi_dj_raw_event(struct hid_device *hdev,
 			     struct hid_report *report, u8 *data,
 			     int size)
 {
+	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
 	dbg_hid("%s, size:%d\n", __func__, size);
 
+	if (!djrcv_dev)
+		return 0;
+
+	if (!hdev->report_enum[HID_INPUT_REPORT].numbered) {
+
+		if (djrcv_dev->unnumbered_application == HID_GD_KEYBOARD) {
+			/*
+			 * For the keyboard, we can reuse the same report by
+			 * using the second byte which is constant in the USB
+			 * HID report descriptor.
+			 */
+			data[1] = data[0];
+			data[0] = REPORT_TYPE_KEYBOARD;
+
+			logi_dj_recv_forward_input_report(hdev, data, size);
+
+			/* restore previous state */
+			data[0] = data[1];
+			data[1] = 0;
+		}
+		/*
+		 * Mouse-only receivers send unnumbered mouse data. The 27 MHz
+		 * receiver uses 6 byte packets, the nano receiver 8 bytes.
+		 */
+		if (djrcv_dev->unnumbered_application == HID_GD_MOUSE &&
+		    size <= 8) {
+			u8 mouse_report[9];
+
+			/* Prepend report id */
+			mouse_report[0] = REPORT_TYPE_MOUSE;
+			memcpy(mouse_report + 1, data, size);
+			logi_dj_recv_forward_input_report(hdev, mouse_report,
+							  size + 1);
+		}
+
+		return false;
+	}
+
 	switch (data[0]) {
 	case REPORT_ID_DJ_SHORT:
 		if (size != DJREPORT_SHORT_LENGTH) {
-			dev_err(&hdev->dev, "DJ report of bad size (%d)", size);
+			hid_err(hdev, "Short DJ report bad size (%d)", size);
+			return false;
+		}
+		return logi_dj_dj_event(hdev, report, data, size);
+	case REPORT_ID_DJ_LONG:
+		if (size != DJREPORT_LONG_LENGTH) {
+			hid_err(hdev, "Long DJ report bad size (%d)", size);
 			return false;
 		}
 		return logi_dj_dj_event(hdev, report, data, size);
 	case REPORT_ID_HIDPP_SHORT:
 		if (size != HIDPP_REPORT_SHORT_LENGTH) {
-			dev_err(&hdev->dev,
-				"Short HID++ report of bad size (%d)", size);
+			hid_err(hdev, "Short HID++ report bad size (%d)", size);
 			return false;
 		}
 		return logi_dj_hidpp_event(hdev, report, data, size);
 	case REPORT_ID_HIDPP_LONG:
 		if (size != HIDPP_REPORT_LONG_LENGTH) {
-			dev_err(&hdev->dev,
-				"Long HID++ report of bad size (%d)", size);
+			hid_err(hdev, "Long HID++ report bad size (%d)", size);
 			return false;
 		}
 		return logi_dj_hidpp_event(hdev, report, data, size);
 	}
 
+	logi_dj_recv_forward_input_report(hdev, data, size);
+
 	return false;
 }
 
 static int logi_dj_probe(struct hid_device *hdev,
 			 const struct hid_device_id *id)
 {
-	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
+	struct hid_report_enum *rep_enum;
+	struct hid_report *rep;
 	struct dj_receiver_dev *djrcv_dev;
+	struct usb_interface *intf;
+	unsigned int no_dj_interfaces = 0;
+	bool has_hidpp = false;
+	unsigned long flags;
 	int retval;
 
-	dbg_hid("%s called for ifnum %d\n", __func__,
-		intf->cur_altsetting->desc.bInterfaceNumber);
+	/*
+	 * Call to usbhid to fetch the HID descriptors of the current
+	 * interface subsequently call to the hid/hid-core to parse the
+	 * fetched descriptors.
+	 */
+	retval = hid_parse(hdev);
+	if (retval) {
+		hid_err(hdev, "%s: parse failed\n", __func__);
+		return retval;
+	}
 
-	/* Ignore interfaces 0 and 1, they will not carry any data, dont create
-	 * any hid_device for them */
-	if (intf->cur_altsetting->desc.bInterfaceNumber !=
-	    LOGITECH_DJ_INTERFACE_NUMBER) {
-		dbg_hid("%s: ignoring ifnum %d\n", __func__,
-			intf->cur_altsetting->desc.bInterfaceNumber);
+	/*
+	 * Some KVMs add an extra interface for e.g. mouse emulation. If we
+	 * treat these as logitech-dj interfaces then this causes input events
+	 * reported through this extra interface to not be reported correctly.
+	 * To avoid this, we treat these as generic-hid devices.
+	 */
+	switch (id->driver_data) {
+	case recvr_type_dj:		no_dj_interfaces = 3; break;
+	case recvr_type_hidpp:		no_dj_interfaces = 2; break;
+	case recvr_type_gaming_hidpp:	no_dj_interfaces = 3; break;
+	case recvr_type_mouse_only:	no_dj_interfaces = 2; break;
+	case recvr_type_27mhz:		no_dj_interfaces = 2; break;
+	case recvr_type_bluetooth:	no_dj_interfaces = 2; break;
+	}
+	if (hid_is_using_ll_driver(hdev, &usb_hid_driver)) {
+		intf = to_usb_interface(hdev->dev.parent);
+		if (intf && intf->altsetting->desc.bInterfaceNumber >=
+							no_dj_interfaces) {
+			hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
+			return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+		}
+	}
+
+	rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
+
+	/* no input reports, bail out */
+	if (list_empty(&rep_enum->report_list))
 		return -ENODEV;
+
+	/*
+	 * Check for the HID++ application.
+	 * Note: we should theoretically check for HID++ and DJ
+	 * collections, but this will do.
+	 */
+	list_for_each_entry(rep, &rep_enum->report_list, list) {
+		if (rep->application == 0xff000001)
+			has_hidpp = true;
 	}
 
-	/* Treat interface 2 */
+	/*
+	 * Ignore interfaces without DJ/HID++ collection, they will not carry
+	 * any data, dont create any hid_device for them.
+	 */
+	if (!has_hidpp && id->driver_data == recvr_type_dj)
+		return -ENODEV;
 
-	djrcv_dev = kzalloc(sizeof(struct dj_receiver_dev), GFP_KERNEL);
+	/* get the current application attached to the node */
+	rep = list_first_entry(&rep_enum->report_list, struct hid_report, list);
+	djrcv_dev = dj_get_receiver_dev(hdev, id->driver_data,
+					rep->application, has_hidpp);
 	if (!djrcv_dev) {
-		dev_err(&hdev->dev,
-			"%s:failed allocating dj_receiver_dev\n", __func__);
-		return -ENOMEM;
-	}
-	djrcv_dev->hdev = hdev;
-	INIT_WORK(&djrcv_dev->work, delayedwork_callback);
-	spin_lock_init(&djrcv_dev->lock);
-	if (kfifo_alloc(&djrcv_dev->notif_fifo,
-			DJ_MAX_NUMBER_NOTIFICATIONS * sizeof(struct dj_report),
-			GFP_KERNEL)) {
-		dev_err(&hdev->dev,
-			"%s:failed allocating notif_fifo\n", __func__);
-		kfree(djrcv_dev);
+		hid_err(hdev, "%s: dj_get_receiver_dev failed\n", __func__);
 		return -ENOMEM;
 	}
-	hid_set_drvdata(hdev, djrcv_dev);
-
-	/* Call  to usbhid to fetch the HID descriptors of interface 2 and
-	 * subsequently call to the hid/hid-core to parse the fetched
-	 * descriptors, this will in turn create the hidraw and hiddev nodes
-	 * for interface 2 of the receiver */
-	retval = hid_parse(hdev);
-	if (retval) {
-		dev_err(&hdev->dev,
-			"%s:parse of interface 2 failed\n", __func__);
-		goto hid_parse_fail;
-	}
 
-	if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, REPORT_ID_DJ_SHORT,
-				 0, DJREPORT_SHORT_LENGTH - 1)) {
-		retval = -ENODEV;
-		goto hid_parse_fail;
-	}
+	if (!rep_enum->numbered)
+		djrcv_dev->unnumbered_application = rep->application;
 
 	/* Starts the usb device and connects to upper interfaces hiddev and
 	 * hidraw */
-	retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+	retval = hid_hw_start(hdev, HID_CONNECT_HIDRAW|HID_CONNECT_HIDDEV);
 	if (retval) {
-		dev_err(&hdev->dev,
-			"%s:hid_hw_start returned error\n", __func__);
+		hid_err(hdev, "%s: hid_hw_start returned error\n", __func__);
 		goto hid_hw_start_fail;
 	}
 
-	retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0);
-	if (retval < 0) {
-		dev_err(&hdev->dev,
-			"%s:logi_dj_recv_switch_to_dj_mode returned error:%d\n",
-			__func__, retval);
-		goto switch_to_dj_mode_fail;
+	if (has_hidpp) {
+		retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0);
+		if (retval < 0) {
+			hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n",
+				__func__, retval);
+			goto switch_to_dj_mode_fail;
+		}
 	}
 
 	/* This is enabling the polling urb on the IN endpoint */
 	retval = hid_hw_open(hdev);
 	if (retval < 0) {
-		dev_err(&hdev->dev, "%s:hid_hw_open returned error:%d\n",
+		hid_err(hdev, "%s: hid_hw_open returned error:%d\n",
 			__func__, retval);
 		goto llopen_failed;
 	}
@@ -1074,11 +1724,16 @@ static int logi_dj_probe(struct hid_device *hdev,
 	/* Allow incoming packets to arrive: */
 	hid_device_io_start(hdev);
 
-	retval = logi_dj_recv_query_paired_devices(djrcv_dev);
-	if (retval < 0) {
-		dev_err(&hdev->dev, "%s:logi_dj_recv_query_paired_devices "
-			"error:%d\n", __func__, retval);
-		goto logi_dj_recv_query_paired_devices_failed;
+	if (has_hidpp) {
+		spin_lock_irqsave(&djrcv_dev->lock, flags);
+		djrcv_dev->ready = true;
+		spin_unlock_irqrestore(&djrcv_dev->lock, flags);
+		retval = logi_dj_recv_query_paired_devices(djrcv_dev);
+		if (retval < 0) {
+			hid_err(hdev, "%s: logi_dj_recv_query_paired_devices error:%d\n",
+				__func__, retval);
+			goto logi_dj_recv_query_paired_devices_failed;
+		}
 	}
 
 	return retval;
@@ -1091,12 +1746,8 @@ switch_to_dj_mode_fail:
 	hid_hw_stop(hdev);
 
 hid_hw_start_fail:
-hid_parse_fail:
-	kfifo_free(&djrcv_dev->notif_fifo);
-	kfree(djrcv_dev);
-	hid_set_drvdata(hdev, NULL);
+	dj_put_receiver_dev(hdev);
 	return retval;
-
 }
 
 #ifdef CONFIG_PM
@@ -1105,10 +1756,12 @@ static int logi_dj_reset_resume(struct hid_device *hdev)
 	int retval;
 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
 
+	if (!djrcv_dev || djrcv_dev->hidpp != hdev)
+		return 0;
+
 	retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0);
 	if (retval < 0) {
-		dev_err(&hdev->dev,
-			"%s:logi_dj_recv_switch_to_dj_mode returned error:%d\n",
+		hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n",
 			__func__, retval);
 	}
 
@@ -1120,39 +1773,91 @@ static void logi_dj_remove(struct hid_device *hdev)
 {
 	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
 	struct dj_device *dj_dev;
+	unsigned long flags;
 	int i;
 
 	dbg_hid("%s\n", __func__);
 
+	if (!djrcv_dev)
+		return hid_hw_stop(hdev);
+
+	/*
+	 * This ensures that if the work gets requeued from another
+	 * interface of the same receiver it will be a no-op.
+	 */
+	spin_lock_irqsave(&djrcv_dev->lock, flags);
+	djrcv_dev->ready = false;
+	spin_unlock_irqrestore(&djrcv_dev->lock, flags);
+
 	cancel_work_sync(&djrcv_dev->work);
 
 	hid_hw_close(hdev);
 	hid_hw_stop(hdev);
 
-	/* I suppose that at this point the only context that can access
-	 * the djrecv_data is this thread as the work item is guaranteed to
-	 * have finished and no more raw_event callbacks should arrive after
-	 * the remove callback was triggered so no locks are put around the
-	 * code below */
+	/*
+	 * For proper operation we need access to all interfaces, so we destroy
+	 * the paired devices when we're unbound from any interface.
+	 *
+	 * Note we may still be bound to other interfaces, sharing the same
+	 * djrcv_dev, so we need locking here.
+	 */
 	for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) {
+		spin_lock_irqsave(&djrcv_dev->lock, flags);
 		dj_dev = djrcv_dev->paired_dj_devices[i];
+		djrcv_dev->paired_dj_devices[i] = NULL;
+		spin_unlock_irqrestore(&djrcv_dev->lock, flags);
 		if (dj_dev != NULL) {
 			hid_destroy_device(dj_dev->hdev);
 			kfree(dj_dev);
-			djrcv_dev->paired_dj_devices[i] = NULL;
 		}
 	}
 
-	kfifo_free(&djrcv_dev->notif_fifo);
-	kfree(djrcv_dev);
-	hid_set_drvdata(hdev, NULL);
+	dj_put_receiver_dev(hdev);
 }
 
 static const struct hid_device_id logi_dj_receivers[] = {
 	{HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
-		USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER)},
+		USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER),
+	 .driver_data = recvr_type_dj},
 	{HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
-		USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2)},
+		USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2),
+	 .driver_data = recvr_type_dj},
+	{ /* Logitech Nano mouse only receiver */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+			 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER),
+	 .driver_data = recvr_type_mouse_only},
+	{ /* Logitech Nano (non DJ) receiver */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+			 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_2),
+	 .driver_data = recvr_type_hidpp},
+	{ /* Logitech gaming receiver (0xc539) */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+		USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_GAMING),
+	 .driver_data = recvr_type_gaming_hidpp},
+	{ /* Logitech 27 MHz HID++ 1.0 receiver (0xc517) */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+		USB_DEVICE_ID_S510_RECEIVER_2),
+	 .driver_data = recvr_type_27mhz},
+	{ /* Logitech 27 MHz HID++ 1.0 mouse-only receiver (0xc51b) */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+		USB_DEVICE_ID_LOGITECH_27MHZ_MOUSE_RECEIVER),
+	 .driver_data = recvr_type_27mhz},
+	{ /* Logitech MX5000 HID++ / bluetooth receiver keyboard intf. */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+		0xc70e),
+	 .driver_data = recvr_type_bluetooth},
+	{ /* Logitech MX5000 HID++ / bluetooth receiver mouse intf. */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+		0xc70a),
+	 .driver_data = recvr_type_bluetooth},
+	{ /* Logitech MX5500 HID++ / bluetooth receiver keyboard intf. */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+		0xc71b),
+	 .driver_data = recvr_type_bluetooth},
+	{ /* Logitech MX5500 HID++ / bluetooth receiver mouse intf. */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+		0xc71c),
+	 .driver_data = recvr_type_bluetooth},
 	{}
 };
 
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 199cc256e9d9..cf05816a601f 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  HIDPP protocol for Logitech Unifying receivers
  *
@@ -6,11 +7,6 @@
  *  Copyright (c) 2013-2014 Red Hat Inc.
  */
 
-/*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; version 2 of the License.
- */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
@@ -51,7 +47,11 @@ MODULE_PARM_DESC(disable_tap_to_click,
 
 #define HIDPP_REPORT_SHORT_LENGTH		7
 #define HIDPP_REPORT_LONG_LENGTH		20
-#define HIDPP_REPORT_VERY_LONG_LENGTH		64
+#define HIDPP_REPORT_VERY_LONG_MAX_LENGTH	64
+
+#define HIDPP_SUB_ID_CONSUMER_VENDOR_KEYS	0x03
+#define HIDPP_SUB_ID_ROLLER			0x05
+#define HIDPP_SUB_ID_MOUSE_EXTRA_BTNS		0x06
 
 #define HIDPP_QUIRK_CLASS_WTP			BIT(0)
 #define HIDPP_QUIRK_CLASS_M560			BIT(1)
@@ -68,6 +68,13 @@ MODULE_PARM_DESC(disable_tap_to_click,
 #define HIDPP_QUIRK_HI_RES_SCROLL_1P0		BIT(26)
 #define HIDPP_QUIRK_HI_RES_SCROLL_X2120		BIT(27)
 #define HIDPP_QUIRK_HI_RES_SCROLL_X2121		BIT(28)
+#define HIDPP_QUIRK_HIDPP_WHEELS		BIT(29)
+#define HIDPP_QUIRK_HIDPP_EXTRA_MOUSE_BTNS	BIT(30)
+#define HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS	BIT(31)
+
+/* These are just aliases for now */
+#define HIDPP_QUIRK_KBD_SCROLL_WHEEL HIDPP_QUIRK_HIDPP_WHEELS
+#define HIDPP_QUIRK_KBD_ZOOM_WHEEL   HIDPP_QUIRK_HIDPP_WHEELS
 
 /* Convenience constant to check for any high-res support. */
 #define HIDPP_QUIRK_HI_RES_SCROLL	(HIDPP_QUIRK_HI_RES_SCROLL_1P0 | \
@@ -106,13 +113,13 @@ MODULE_PARM_DESC(disable_tap_to_click,
 struct fap {
 	u8 feature_index;
 	u8 funcindex_clientid;
-	u8 params[HIDPP_REPORT_VERY_LONG_LENGTH - 4U];
+	u8 params[HIDPP_REPORT_VERY_LONG_MAX_LENGTH - 4U];
 };
 
 struct rap {
 	u8 sub_id;
 	u8 reg_address;
-	u8 params[HIDPP_REPORT_VERY_LONG_LENGTH - 4U];
+	u8 params[HIDPP_REPORT_VERY_LONG_MAX_LENGTH - 4U];
 };
 
 struct hidpp_report {
@@ -149,7 +156,6 @@ struct hidpp_battery {
  * @last_time: last event time, used to reset remainder after inactivity
  */
 struct hidpp_scroll_counter {
-	struct input_dev *dev;
 	int wheel_multiplier;
 	int remainder;
 	int direction;
@@ -158,10 +164,12 @@ struct hidpp_scroll_counter {
 
 struct hidpp_device {
 	struct hid_device *hid_dev;
+	struct input_dev *input;
 	struct mutex send_mutex;
 	void *send_receive_buf;
 	char *name;		/* will never be NULL and should not be freed */
 	wait_queue_head_t wait;
+	int very_long_report_length;
 	bool answer_available;
 	u8 protocol_major;
 	u8 protocol_minor;
@@ -206,8 +214,6 @@ static int __hidpp_send_report(struct hid_device *hdev,
 	struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 	int fields_count, ret;
 
-	hidpp = hid_get_drvdata(hdev);
-
 	switch (hidpp_report->report_id) {
 	case REPORT_ID_HIDPP_SHORT:
 		fields_count = HIDPP_REPORT_SHORT_LENGTH;
@@ -216,7 +222,7 @@ static int __hidpp_send_report(struct hid_device *hdev,
 		fields_count = HIDPP_REPORT_LONG_LENGTH;
 		break;
 	case REPORT_ID_HIDPP_VERY_LONG:
-		fields_count = HIDPP_REPORT_VERY_LONG_LENGTH;
+		fields_count = hidpp->very_long_report_length;
 		break;
 	default:
 		return -ENODEV;
@@ -342,7 +348,7 @@ static int hidpp_send_rap_command_sync(struct hidpp_device *hidpp_dev,
 		max_count = HIDPP_REPORT_LONG_LENGTH - 4;
 		break;
 	case REPORT_ID_HIDPP_VERY_LONG:
-		max_count = HIDPP_REPORT_VERY_LONG_LENGTH - 4;
+		max_count = hidpp_dev->very_long_report_length - 4;
 		break;
 	default:
 		return -EINVAL;
@@ -434,14 +440,15 @@ static void hidpp_prefix_name(char **name, int name_length)
  * emit low-resolution scroll events when appropriate for
  * backwards-compatibility with userspace input libraries.
  */
-static void hidpp_scroll_counter_handle_scroll(struct hidpp_scroll_counter *counter,
+static void hidpp_scroll_counter_handle_scroll(struct input_dev *input_dev,
+					       struct hidpp_scroll_counter *counter,
 					       int hi_res_value)
 {
 	int low_res_value, remainder, direction;
 	unsigned long long now, previous;
 
 	hi_res_value = hi_res_value * 120/counter->wheel_multiplier;
-	input_report_rel(counter->dev, REL_WHEEL_HI_RES, hi_res_value);
+	input_report_rel(input_dev, REL_WHEEL_HI_RES, hi_res_value);
 
 	remainder = counter->remainder;
 	direction = hi_res_value > 0 ? 1 : -1;
@@ -475,7 +482,7 @@ static void hidpp_scroll_counter_handle_scroll(struct hidpp_scroll_counter *coun
 		low_res_value = remainder / 120;
 		if (low_res_value == 0)
 			low_res_value = (hi_res_value > 0 ? 1 : -1);
-		input_report_rel(counter->dev, REL_WHEEL, low_res_value);
+		input_report_rel(input_dev, REL_WHEEL, low_res_value);
 		remainder -= low_res_value * 120;
 	}
 	counter->remainder = remainder;
@@ -491,14 +498,16 @@ static void hidpp_scroll_counter_handle_scroll(struct hidpp_scroll_counter *coun
 #define HIDPP_GET_LONG_REGISTER				0x83
 
 /**
- * hidpp10_set_register_bit() - Sets a single bit in a HID++ 1.0 register.
+ * hidpp10_set_register - Modify a HID++ 1.0 register.
  * @hidpp_dev: the device to set the register on.
  * @register_address: the address of the register to modify.
  * @byte: the byte of the register to modify. Should be less than 3.
+ * @mask: mask of the bits to modify
+ * @value: new values for the bits in mask
  * Return: 0 if successful, otherwise a negative error code.
  */
-static int hidpp10_set_register_bit(struct hidpp_device *hidpp_dev,
-	u8 register_address, u8 byte, u8 bit)
+static int hidpp10_set_register(struct hidpp_device *hidpp_dev,
+	u8 register_address, u8 byte, u8 mask, u8 value)
 {
 	struct hidpp_report response;
 	int ret;
@@ -514,7 +523,8 @@ static int hidpp10_set_register_bit(struct hidpp_device *hidpp_dev,
 
 	memcpy(params, response.rap.params, 3);
 
-	params[byte] |= BIT(bit);
+	params[byte] &= ~mask;
+	params[byte] |= value & mask;
 
 	return hidpp_send_rap_command_sync(hidpp_dev,
 					   REPORT_ID_HIDPP_SHORT,
@@ -523,20 +533,28 @@ static int hidpp10_set_register_bit(struct hidpp_device *hidpp_dev,
 					   params, 3, &response);
 }
 
-
-#define HIDPP_REG_GENERAL				0x00
+#define HIDPP_REG_ENABLE_REPORTS			0x00
+#define HIDPP_ENABLE_CONSUMER_REPORT			BIT(0)
+#define HIDPP_ENABLE_WHEEL_REPORT			BIT(2)
+#define HIDPP_ENABLE_MOUSE_EXTRA_BTN_REPORT		BIT(3)
+#define HIDPP_ENABLE_BAT_REPORT				BIT(4)
+#define HIDPP_ENABLE_HWHEEL_REPORT			BIT(5)
 
 static int hidpp10_enable_battery_reporting(struct hidpp_device *hidpp_dev)
 {
-	return hidpp10_set_register_bit(hidpp_dev, HIDPP_REG_GENERAL, 0, 4);
+	return hidpp10_set_register(hidpp_dev, HIDPP_REG_ENABLE_REPORTS, 0,
+			  HIDPP_ENABLE_BAT_REPORT, HIDPP_ENABLE_BAT_REPORT);
 }
 
 #define HIDPP_REG_FEATURES				0x01
+#define HIDPP_ENABLE_SPECIAL_BUTTON_FUNC		BIT(1)
+#define HIDPP_ENABLE_FAST_SCROLL			BIT(6)
 
 /* On HID++ 1.0 devices, high-res scroll was called "scrolling acceleration". */
 static int hidpp10_enable_scrolling_acceleration(struct hidpp_device *hidpp_dev)
 {
-	return hidpp10_set_register_bit(hidpp_dev, HIDPP_REG_FEATURES, 0, 6);
+	return hidpp10_set_register(hidpp_dev, HIDPP_REG_FEATURES, 0,
+			  HIDPP_ENABLE_FAST_SCROLL, HIDPP_ENABLE_FAST_SCROLL);
 }
 
 #define HIDPP_REG_BATTERY_STATUS			0x07
@@ -741,6 +759,9 @@ static char *hidpp_unifying_get_name(struct hidpp_device *hidpp_dev)
 	if (2 + len > sizeof(response.rap.params))
 		return NULL;
 
+	if (len < 4) /* logitech devices are usually at least Xddd */
+		return NULL;
+
 	name = kzalloc(len + 1, GFP_KERNEL);
 	if (!name)
 		return NULL;
@@ -836,18 +857,21 @@ static int hidpp_root_get_feature(struct hidpp_device *hidpp, u16 feature,
 
 static int hidpp_root_get_protocol_version(struct hidpp_device *hidpp)
 {
+	const u8 ping_byte = 0x5a;
+	u8 ping_data[3] = { 0, 0, ping_byte };
 	struct hidpp_report response;
 	int ret;
 
-	ret = hidpp_send_fap_command_sync(hidpp,
+	ret = hidpp_send_rap_command_sync(hidpp,
+			REPORT_ID_HIDPP_SHORT,
 			HIDPP_PAGE_ROOT_IDX,
 			CMD_ROOT_GET_PROTOCOL_VERSION,
-			NULL, 0, &response);
+			ping_data, sizeof(ping_data), &response);
 
 	if (ret == HIDPP_ERROR_INVALID_SUBID) {
 		hidpp->protocol_major = 1;
 		hidpp->protocol_minor = 0;
-		return 0;
+		goto print_version;
 	}
 
 	/* the device might not be connected */
@@ -862,21 +886,19 @@ static int hidpp_root_get_protocol_version(struct hidpp_device *hidpp)
 	if (ret)
 		return ret;
 
-	hidpp->protocol_major = response.fap.params[0];
-	hidpp->protocol_minor = response.fap.params[1];
-
-	return ret;
-}
+	if (response.rap.params[2] != ping_byte) {
+		hid_err(hidpp->hid_dev, "%s: ping mismatch 0x%02x != 0x%02x\n",
+			__func__, response.rap.params[2], ping_byte);
+		return -EPROTO;
+	}
 
-static bool hidpp_is_connected(struct hidpp_device *hidpp)
-{
-	int ret;
+	hidpp->protocol_major = response.rap.params[0];
+	hidpp->protocol_minor = response.rap.params[1];
 
-	ret = hidpp_root_get_protocol_version(hidpp);
-	if (!ret)
-		hid_dbg(hidpp->hid_dev, "HID++ %u.%u device connected.\n",
-			hidpp->protocol_major, hidpp->protocol_minor);
-	return ret == 0;
+print_version:
+	hid_info(hidpp->hid_dev, "HID++ %u.%u device connected.\n",
+		 hidpp->protocol_major, hidpp->protocol_minor);
+	return 0;
 }
 
 /* -------------------------------------------------------------------------- */
@@ -932,7 +954,7 @@ static int hidpp_devicenametype_get_device_name(struct hidpp_device *hidpp,
 
 	switch (response.report_id) {
 	case REPORT_ID_HIDPP_VERY_LONG:
-		count = HIDPP_REPORT_VERY_LONG_LENGTH - 4;
+		count = hidpp->very_long_report_length - 4;
 		break;
 	case REPORT_ID_HIDPP_LONG:
 		count = HIDPP_REPORT_LONG_LENGTH - 4;
@@ -1012,7 +1034,11 @@ static int hidpp_map_battery_level(int capacity)
 {
 	if (capacity < 11)
 		return POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
-	else if (capacity < 31)
+	/*
+	 * The spec says this should be < 31 but some devices report 30
+	 * with brand new batteries and Windows reports 30 as "Good".
+	 */
+	else if (capacity < 30)
 		return POWER_SUPPLY_CAPACITY_LEVEL_LOW;
 	else if (capacity < 81)
 		return POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
@@ -2211,7 +2237,6 @@ static int hidpp_ff_deinit(struct hid_device *hid)
 #define WTP_MANUAL_RESOLUTION				39
 
 struct wtp_data {
-	struct input_dev *input;
 	u16 x_size, y_size;
 	u8 finger_count;
 	u8 mt_feature_index;
@@ -2229,7 +2254,7 @@ static int wtp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 }
 
 static void wtp_populate_input(struct hidpp_device *hidpp,
-		struct input_dev *input_dev, bool origin_is_hid_core)
+			       struct input_dev *input_dev)
 {
 	struct wtp_data *wd = hidpp->private_data;
 
@@ -2255,31 +2280,30 @@ static void wtp_populate_input(struct hidpp_device *hidpp,
 
 	input_mt_init_slots(input_dev, wd->maxcontacts, INPUT_MT_POINTER |
 		INPUT_MT_DROP_UNUSED);
-
-	wd->input = input_dev;
 }
 
-static void wtp_touch_event(struct wtp_data *wd,
+static void wtp_touch_event(struct hidpp_device *hidpp,
 	struct hidpp_touchpad_raw_xy_finger *touch_report)
 {
+	struct wtp_data *wd = hidpp->private_data;
 	int slot;
 
 	if (!touch_report->finger_id || touch_report->contact_type)
 		/* no actual data */
 		return;
 
-	slot = input_mt_get_slot_by_key(wd->input, touch_report->finger_id);
+	slot = input_mt_get_slot_by_key(hidpp->input, touch_report->finger_id);
 
-	input_mt_slot(wd->input, slot);
-	input_mt_report_slot_state(wd->input, MT_TOOL_FINGER,
+	input_mt_slot(hidpp->input, slot);
+	input_mt_report_slot_state(hidpp->input, MT_TOOL_FINGER,
 					touch_report->contact_status);
 	if (touch_report->contact_status) {
-		input_event(wd->input, EV_ABS, ABS_MT_POSITION_X,
+		input_event(hidpp->input, EV_ABS, ABS_MT_POSITION_X,
 				touch_report->x);
-		input_event(wd->input, EV_ABS, ABS_MT_POSITION_Y,
+		input_event(hidpp->input, EV_ABS, ABS_MT_POSITION_Y,
 				wd->flip_y ? wd->y_size - touch_report->y :
 					     touch_report->y);
-		input_event(wd->input, EV_ABS, ABS_MT_PRESSURE,
+		input_event(hidpp->input, EV_ABS, ABS_MT_PRESSURE,
 				touch_report->area);
 	}
 }
@@ -2287,19 +2311,18 @@ static void wtp_touch_event(struct wtp_data *wd,
 static void wtp_send_raw_xy_event(struct hidpp_device *hidpp,
 		struct hidpp_touchpad_raw_xy *raw)
 {
-	struct wtp_data *wd = hidpp->private_data;
 	int i;
 
 	for (i = 0; i < 2; i++)
-		wtp_touch_event(wd, &(raw->fingers[i]));
+		wtp_touch_event(hidpp, &(raw->fingers[i]));
 
 	if (raw->end_of_frame &&
 	    !(hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS))
-		input_event(wd->input, EV_KEY, BTN_LEFT, raw->button);
+		input_event(hidpp->input, EV_KEY, BTN_LEFT, raw->button);
 
 	if (raw->end_of_frame || raw->finger_count <= 2) {
-		input_mt_sync_frame(wd->input);
-		input_sync(wd->input);
+		input_mt_sync_frame(hidpp->input);
+		input_sync(hidpp->input);
 	}
 }
 
@@ -2349,7 +2372,7 @@ static int wtp_raw_event(struct hid_device *hdev, u8 *data, int size)
 	struct hidpp_report *report = (struct hidpp_report *)data;
 	struct hidpp_touchpad_raw_xy raw;
 
-	if (!wd || !wd->input)
+	if (!wd || !hidpp->input)
 		return 1;
 
 	switch (data[0]) {
@@ -2360,11 +2383,11 @@ static int wtp_raw_event(struct hid_device *hdev, u8 *data, int size)
 			return 1;
 		}
 		if (hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS) {
-			input_event(wd->input, EV_KEY, BTN_LEFT,
+			input_event(hidpp->input, EV_KEY, BTN_LEFT,
 					!!(data[1] & 0x01));
-			input_event(wd->input, EV_KEY, BTN_RIGHT,
+			input_event(hidpp->input, EV_KEY, BTN_RIGHT,
 					!!(data[1] & 0x02));
-			input_sync(wd->input);
+			input_sync(hidpp->input);
 			return 0;
 		} else {
 			if (size < 21)
@@ -2482,10 +2505,6 @@ static int wtp_connect(struct hid_device *hdev, bool connected)
 
 static const u8 m560_config_parameter[] = {0x00, 0xaf, 0x03};
 
-struct m560_private_data {
-	struct input_dev *input;
-};
-
 /* how buttons are mapped in the report */
 #define M560_MOUSE_BTN_LEFT		0x01
 #define M560_MOUSE_BTN_RIGHT		0x02
@@ -2513,28 +2532,12 @@ static int m560_send_config_command(struct hid_device *hdev, bool connected)
 	);
 }
 
-static int m560_allocate(struct hid_device *hdev)
-{
-	struct hidpp_device *hidpp = hid_get_drvdata(hdev);
-	struct m560_private_data *d;
-
-	d = devm_kzalloc(&hdev->dev, sizeof(struct m560_private_data),
-			GFP_KERNEL);
-	if (!d)
-		return -ENOMEM;
-
-	hidpp->private_data = d;
-
-	return 0;
-};
-
 static int m560_raw_event(struct hid_device *hdev, u8 *data, int size)
 {
 	struct hidpp_device *hidpp = hid_get_drvdata(hdev);
-	struct m560_private_data *mydata = hidpp->private_data;
 
 	/* sanity check */
-	if (!mydata || !mydata->input) {
+	if (!hidpp->input) {
 		hid_err(hdev, "error in parameter\n");
 		return -EINVAL;
 	}
@@ -2561,24 +2564,24 @@ static int m560_raw_event(struct hid_device *hdev, u8 *data, int size)
 
 		switch (data[5]) {
 		case 0xaf:
-			input_report_key(mydata->input, BTN_MIDDLE, 1);
+			input_report_key(hidpp->input, BTN_MIDDLE, 1);
 			break;
 		case 0xb0:
-			input_report_key(mydata->input, BTN_FORWARD, 1);
+			input_report_key(hidpp->input, BTN_FORWARD, 1);
 			break;
 		case 0xae:
-			input_report_key(mydata->input, BTN_BACK, 1);
+			input_report_key(hidpp->input, BTN_BACK, 1);
 			break;
 		case 0x00:
-			input_report_key(mydata->input, BTN_BACK, 0);
-			input_report_key(mydata->input, BTN_FORWARD, 0);
-			input_report_key(mydata->input, BTN_MIDDLE, 0);
+			input_report_key(hidpp->input, BTN_BACK, 0);
+			input_report_key(hidpp->input, BTN_FORWARD, 0);
+			input_report_key(hidpp->input, BTN_MIDDLE, 0);
 			break;
 		default:
 			hid_err(hdev, "error in report\n");
 			return 0;
 		}
-		input_sync(mydata->input);
+		input_sync(hidpp->input);
 
 	} else if (data[0] == 0x02) {
 		/*
@@ -2592,59 +2595,55 @@ static int m560_raw_event(struct hid_device *hdev, u8 *data, int size)
 
 		int v;
 
-		input_report_key(mydata->input, BTN_LEFT,
+		input_report_key(hidpp->input, BTN_LEFT,
 			!!(data[1] & M560_MOUSE_BTN_LEFT));
-		input_report_key(mydata->input, BTN_RIGHT,
+		input_report_key(hidpp->input, BTN_RIGHT,
 			!!(data[1] & M560_MOUSE_BTN_RIGHT));
 
 		if (data[1] & M560_MOUSE_BTN_WHEEL_LEFT) {
-			input_report_rel(mydata->input, REL_HWHEEL, -1);
-			input_report_rel(mydata->input, REL_HWHEEL_HI_RES,
+			input_report_rel(hidpp->input, REL_HWHEEL, -1);
+			input_report_rel(hidpp->input, REL_HWHEEL_HI_RES,
 					 -120);
 		} else if (data[1] & M560_MOUSE_BTN_WHEEL_RIGHT) {
-			input_report_rel(mydata->input, REL_HWHEEL, 1);
-			input_report_rel(mydata->input, REL_HWHEEL_HI_RES,
+			input_report_rel(hidpp->input, REL_HWHEEL, 1);
+			input_report_rel(hidpp->input, REL_HWHEEL_HI_RES,
 					 120);
 		}
 
 		v = hid_snto32(hid_field_extract(hdev, data+3, 0, 12), 12);
-		input_report_rel(mydata->input, REL_X, v);
+		input_report_rel(hidpp->input, REL_X, v);
 
 		v = hid_snto32(hid_field_extract(hdev, data+3, 12, 12), 12);
-		input_report_rel(mydata->input, REL_Y, v);
+		input_report_rel(hidpp->input, REL_Y, v);
 
 		v = hid_snto32(data[6], 8);
 		if (v != 0)
-			hidpp_scroll_counter_handle_scroll(
+			hidpp_scroll_counter_handle_scroll(hidpp->input,
 					&hidpp->vertical_wheel_counter, v);
 
-		input_sync(mydata->input);
+		input_sync(hidpp->input);
 	}
 
 	return 1;
 }
 
 static void m560_populate_input(struct hidpp_device *hidpp,
-		struct input_dev *input_dev, bool origin_is_hid_core)
+				struct input_dev *input_dev)
 {
-	struct m560_private_data *mydata = hidpp->private_data;
-
-	mydata->input = input_dev;
-
-	__set_bit(EV_KEY, mydata->input->evbit);
-	__set_bit(BTN_MIDDLE, mydata->input->keybit);
-	__set_bit(BTN_RIGHT, mydata->input->keybit);
-	__set_bit(BTN_LEFT, mydata->input->keybit);
-	__set_bit(BTN_BACK, mydata->input->keybit);
-	__set_bit(BTN_FORWARD, mydata->input->keybit);
+	__set_bit(EV_KEY, input_dev->evbit);
+	__set_bit(BTN_MIDDLE, input_dev->keybit);
+	__set_bit(BTN_RIGHT, input_dev->keybit);
+	__set_bit(BTN_LEFT, input_dev->keybit);
+	__set_bit(BTN_BACK, input_dev->keybit);
+	__set_bit(BTN_FORWARD, input_dev->keybit);
 
-	__set_bit(EV_REL, mydata->input->evbit);
-	__set_bit(REL_X, mydata->input->relbit);
-	__set_bit(REL_Y, mydata->input->relbit);
-	__set_bit(REL_WHEEL, mydata->input->relbit);
-	__set_bit(REL_HWHEEL, mydata->input->relbit);
-	__set_bit(REL_WHEEL_HI_RES, mydata->input->relbit);
-	__set_bit(REL_HWHEEL_HI_RES, mydata->input->relbit);
+	__set_bit(EV_REL, input_dev->evbit);
+	__set_bit(REL_X, input_dev->relbit);
+	__set_bit(REL_Y, input_dev->relbit);
+	__set_bit(REL_WHEEL, input_dev->relbit);
+	__set_bit(REL_HWHEEL, input_dev->relbit);
+	__set_bit(REL_WHEEL_HI_RES, input_dev->relbit);
+	__set_bit(REL_HWHEEL_HI_RES, input_dev->relbit);
 }
 
 static int m560_input_mapping(struct hid_device *hdev, struct hid_input *hi,
@@ -2747,6 +2746,175 @@ static int g920_get_config(struct hidpp_device *hidpp)
 }
 
 /* -------------------------------------------------------------------------- */
+/* HID++1.0 devices which use HID++ reports for their wheels                  */
+/* -------------------------------------------------------------------------- */
+static int hidpp10_wheel_connect(struct hidpp_device *hidpp)
+{
+	return hidpp10_set_register(hidpp, HIDPP_REG_ENABLE_REPORTS, 0,
+			HIDPP_ENABLE_WHEEL_REPORT | HIDPP_ENABLE_HWHEEL_REPORT,
+			HIDPP_ENABLE_WHEEL_REPORT | HIDPP_ENABLE_HWHEEL_REPORT);
+}
+
+static int hidpp10_wheel_raw_event(struct hidpp_device *hidpp,
+				   u8 *data, int size)
+{
+	s8 value, hvalue;
+
+	if (!hidpp->input)
+		return -EINVAL;
+
+	if (size < 7)
+		return 0;
+
+	if (data[0] != REPORT_ID_HIDPP_SHORT || data[2] != HIDPP_SUB_ID_ROLLER)
+		return 0;
+
+	value = data[3];
+	hvalue = data[4];
+
+	input_report_rel(hidpp->input, REL_WHEEL, value);
+	input_report_rel(hidpp->input, REL_WHEEL_HI_RES, value * 120);
+	input_report_rel(hidpp->input, REL_HWHEEL, hvalue);
+	input_report_rel(hidpp->input, REL_HWHEEL_HI_RES, hvalue * 120);
+	input_sync(hidpp->input);
+
+	return 1;
+}
+
+static void hidpp10_wheel_populate_input(struct hidpp_device *hidpp,
+					 struct input_dev *input_dev)
+{
+	__set_bit(EV_REL, input_dev->evbit);
+	__set_bit(REL_WHEEL, input_dev->relbit);
+	__set_bit(REL_WHEEL_HI_RES, input_dev->relbit);
+	__set_bit(REL_HWHEEL, input_dev->relbit);
+	__set_bit(REL_HWHEEL_HI_RES, input_dev->relbit);
+}
+
+/* -------------------------------------------------------------------------- */
+/* HID++1.0 mice which use HID++ reports for extra mouse buttons              */
+/* -------------------------------------------------------------------------- */
+static int hidpp10_extra_mouse_buttons_connect(struct hidpp_device *hidpp)
+{
+	return hidpp10_set_register(hidpp, HIDPP_REG_ENABLE_REPORTS, 0,
+				    HIDPP_ENABLE_MOUSE_EXTRA_BTN_REPORT,
+				    HIDPP_ENABLE_MOUSE_EXTRA_BTN_REPORT);
+}
+
+static int hidpp10_extra_mouse_buttons_raw_event(struct hidpp_device *hidpp,
+				    u8 *data, int size)
+{
+	int i;
+
+	if (!hidpp->input)
+		return -EINVAL;
+
+	if (size < 7)
+		return 0;
+
+	if (data[0] != REPORT_ID_HIDPP_SHORT ||
+	    data[2] != HIDPP_SUB_ID_MOUSE_EXTRA_BTNS)
+		return 0;
+
+	/*
+	 * Buttons are either delivered through the regular mouse report *or*
+	 * through the extra buttons report. At least for button 6 how it is
+	 * delivered differs per receiver firmware version. Even receivers with
+	 * the same usb-id show different behavior, so we handle both cases.
+	 */
+	for (i = 0; i < 8; i++)
+		input_report_key(hidpp->input, BTN_MOUSE + i,
+				 (data[3] & (1 << i)));
+
+	/* Some mice report events on button 9+, use BTN_MISC */
+	for (i = 0; i < 8; i++)
+		input_report_key(hidpp->input, BTN_MISC + i,
+				 (data[4] & (1 << i)));
+
+	input_sync(hidpp->input);
+	return 1;
+}
+
+static void hidpp10_extra_mouse_buttons_populate_input(
+			struct hidpp_device *hidpp, struct input_dev *input_dev)
+{
+	/* BTN_MOUSE - BTN_MOUSE+7 are set already by the descriptor */
+	__set_bit(BTN_0, input_dev->keybit);
+	__set_bit(BTN_1, input_dev->keybit);
+	__set_bit(BTN_2, input_dev->keybit);
+	__set_bit(BTN_3, input_dev->keybit);
+	__set_bit(BTN_4, input_dev->keybit);
+	__set_bit(BTN_5, input_dev->keybit);
+	__set_bit(BTN_6, input_dev->keybit);
+	__set_bit(BTN_7, input_dev->keybit);
+}
+
+/* -------------------------------------------------------------------------- */
+/* HID++1.0 kbds which only report 0x10xx consumer usages through sub-id 0x03 */
+/* -------------------------------------------------------------------------- */
+
+/* Find the consumer-page input report desc and change Maximums to 0x107f */
+static u8 *hidpp10_consumer_keys_report_fixup(struct hidpp_device *hidpp,
+					      u8 *_rdesc, unsigned int *rsize)
+{
+	/* Note 0 terminated so we can use strnstr to search for this. */
+	const char consumer_rdesc_start[] = {
+		0x05, 0x0C,	/* USAGE_PAGE (Consumer Devices)       */
+		0x09, 0x01,	/* USAGE (Consumer Control)            */
+		0xA1, 0x01,	/* COLLECTION (Application)            */
+		0x85, 0x03,	/* REPORT_ID = 3                       */
+		0x75, 0x10,	/* REPORT_SIZE (16)                    */
+		0x95, 0x02,	/* REPORT_COUNT (2)                    */
+		0x15, 0x01,	/* LOGICAL_MIN (1)                     */
+		0x26, 0x00	/* LOGICAL_MAX (...                    */
+	};
+	char *consumer_rdesc, *rdesc = (char *)_rdesc;
+	unsigned int size;
+
+	consumer_rdesc = strnstr(rdesc, consumer_rdesc_start, *rsize);
+	size = *rsize - (consumer_rdesc - rdesc);
+	if (consumer_rdesc && size >= 25) {
+		consumer_rdesc[15] = 0x7f;
+		consumer_rdesc[16] = 0x10;
+		consumer_rdesc[20] = 0x7f;
+		consumer_rdesc[21] = 0x10;
+	}
+	return _rdesc;
+}
+
+static int hidpp10_consumer_keys_connect(struct hidpp_device *hidpp)
+{
+	return hidpp10_set_register(hidpp, HIDPP_REG_ENABLE_REPORTS, 0,
+				    HIDPP_ENABLE_CONSUMER_REPORT,
+				    HIDPP_ENABLE_CONSUMER_REPORT);
+}
+
+static int hidpp10_consumer_keys_raw_event(struct hidpp_device *hidpp,
+					   u8 *data, int size)
+{
+	u8 consumer_report[5];
+
+	if (size < 7)
+		return 0;
+
+	if (data[0] != REPORT_ID_HIDPP_SHORT ||
+	    data[2] != HIDPP_SUB_ID_CONSUMER_VENDOR_KEYS)
+		return 0;
+
+	/*
+	 * Build a normal consumer report (3) out of the data, this detour
+	 * is necessary to get some keyboards to report their 0x10xx usages.
+	 */
+	consumer_report[0] = 0x03;
+	memcpy(&consumer_report[1], &data[3], 4);
+	/* We are called from atomic context */
+	hid_report_raw_event(hidpp->hid_dev, HID_INPUT_REPORT,
+			     consumer_report, 5, 1);
+
+	return 1;
+}
+
+/* -------------------------------------------------------------------------- */
 /* High-resolution scroll wheels                                              */
 /* -------------------------------------------------------------------------- */
 
@@ -2781,12 +2949,31 @@ static int hi_res_scroll_enable(struct hidpp_device *hidpp)
 /* Generic HID++ devices                                                      */
 /* -------------------------------------------------------------------------- */
 
+static u8 *hidpp_report_fixup(struct hid_device *hdev, u8 *rdesc,
+			      unsigned int *rsize)
+{
+	struct hidpp_device *hidpp = hid_get_drvdata(hdev);
+
+	if (!hidpp)
+		return rdesc;
+
+	/* For 27 MHz keyboards the quirk gets set after hid_parse. */
+	if (hdev->group == HID_GROUP_LOGITECH_27MHZ_DEVICE ||
+	    (hidpp->quirks & HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS))
+		rdesc = hidpp10_consumer_keys_report_fixup(hidpp, rdesc, rsize);
+
+	return rdesc;
+}
+
 static int hidpp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 		struct hid_field *field, struct hid_usage *usage,
 		unsigned long **bit, int *max)
 {
 	struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 
+	if (!hidpp)
+		return 0;
+
 	if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
 		return wtp_input_mapping(hdev, hi, field, usage, bit, max);
 	else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560 &&
@@ -2802,6 +2989,9 @@ static int hidpp_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 {
 	struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 
+	if (!hidpp)
+		return 0;
+
 	/* Ensure that Logitech G920 is not given a default fuzz/flat value */
 	if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
 		if (usage->type == EV_ABS && (usage->code == ABS_X ||
@@ -2816,15 +3006,20 @@ static int hidpp_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 
 
 static void hidpp_populate_input(struct hidpp_device *hidpp,
-		struct input_dev *input, bool origin_is_hid_core)
+				 struct input_dev *input)
 {
+	hidpp->input = input;
+
 	if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
-		wtp_populate_input(hidpp, input, origin_is_hid_core);
+		wtp_populate_input(hidpp, input);
 	else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560)
-		m560_populate_input(hidpp, input, origin_is_hid_core);
+		m560_populate_input(hidpp, input);
 
-	if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL)
-		hidpp->vertical_wheel_counter.dev = input;
+	if (hidpp->quirks & HIDPP_QUIRK_HIDPP_WHEELS)
+		hidpp10_wheel_populate_input(hidpp, input);
+
+	if (hidpp->quirks & HIDPP_QUIRK_HIDPP_EXTRA_MOUSE_BTNS)
+		hidpp10_extra_mouse_buttons_populate_input(hidpp, input);
 }
 
 static int hidpp_input_configured(struct hid_device *hdev,
@@ -2833,7 +3028,10 @@ static int hidpp_input_configured(struct hid_device *hdev,
 	struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 	struct input_dev *input = hidinput->input;
 
-	hidpp_populate_input(hidpp, input, true);
+	if (!hidpp)
+		return 0;
+
+	hidpp_populate_input(hidpp, input);
 
 	return 0;
 }
@@ -2893,6 +3091,24 @@ static int hidpp_raw_hidpp_event(struct hidpp_device *hidpp, u8 *data,
 			return ret;
 	}
 
+	if (hidpp->quirks & HIDPP_QUIRK_HIDPP_WHEELS) {
+		ret = hidpp10_wheel_raw_event(hidpp, data, size);
+		if (ret != 0)
+			return ret;
+	}
+
+	if (hidpp->quirks & HIDPP_QUIRK_HIDPP_EXTRA_MOUSE_BTNS) {
+		ret = hidpp10_extra_mouse_buttons_raw_event(hidpp, data, size);
+		if (ret != 0)
+			return ret;
+	}
+
+	if (hidpp->quirks & HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS) {
+		ret = hidpp10_consumer_keys_raw_event(hidpp, data, size);
+		if (ret != 0)
+			return ret;
+	}
+
 	return 0;
 }
 
@@ -2902,10 +3118,13 @@ static int hidpp_raw_event(struct hid_device *hdev, struct hid_report *report,
 	struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 	int ret = 0;
 
+	if (!hidpp)
+		return 0;
+
 	/* Generic HID++ processing. */
 	switch (data[0]) {
 	case REPORT_ID_HIDPP_VERY_LONG:
-		if (size != HIDPP_REPORT_VERY_LONG_LENGTH) {
+		if (size != hidpp->very_long_report_length) {
 			hid_err(hdev, "received hid++ report of bad size (%d)",
 				size);
 			return 1;
@@ -2950,17 +3169,22 @@ static int hidpp_event(struct hid_device *hdev, struct hid_field *field,
 	 * restriction imposed in hidpp_usages.
 	 */
 	struct hidpp_device *hidpp = hid_get_drvdata(hdev);
-	struct hidpp_scroll_counter *counter = &hidpp->vertical_wheel_counter;
+	struct hidpp_scroll_counter *counter;
+
+	if (!hidpp)
+		return 0;
+
+	counter = &hidpp->vertical_wheel_counter;
 	/* A scroll event may occur before the multiplier has been retrieved or
 	 * the input device set, or high-res scroll enabling may fail. In such
 	 * cases we must return early (falling back to default behaviour) to
 	 * avoid a crash in hidpp_scroll_counter_handle_scroll.
 	 */
 	if (!(hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL) || value == 0
-	    || counter->dev == NULL || counter->wheel_multiplier == 0)
+	    || hidpp->input == NULL || counter->wheel_multiplier == 0)
 		return 0;
 
-	hidpp_scroll_counter_handle_scroll(counter, value);
+	hidpp_scroll_counter_handle_scroll(hidpp->input, counter, value);
 	return 1;
 }
 
@@ -3132,32 +3356,45 @@ static void hidpp_connect_event(struct hidpp_device *hidpp)
 			return;
 	}
 
+	if (hidpp->quirks & HIDPP_QUIRK_HIDPP_WHEELS) {
+		ret = hidpp10_wheel_connect(hidpp);
+		if (ret)
+			return;
+	}
+
+	if (hidpp->quirks & HIDPP_QUIRK_HIDPP_EXTRA_MOUSE_BTNS) {
+		ret = hidpp10_extra_mouse_buttons_connect(hidpp);
+		if (ret)
+			return;
+	}
+
+	if (hidpp->quirks & HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS) {
+		ret = hidpp10_consumer_keys_connect(hidpp);
+		if (ret)
+			return;
+	}
+
 	/* the device is already connected, we can ask for its name and
 	 * protocol */
 	if (!hidpp->protocol_major) {
-		ret = !hidpp_is_connected(hidpp);
+		ret = hidpp_root_get_protocol_version(hidpp);
 		if (ret) {
 			hid_err(hdev, "Can not get the protocol version.\n");
 			return;
 		}
-		hid_info(hdev, "HID++ %u.%u device connected.\n",
-			 hidpp->protocol_major, hidpp->protocol_minor);
 	}
 
 	if (hidpp->name == hdev->name && hidpp->protocol_major >= 2) {
 		name = hidpp_get_device_name(hidpp);
-		if (!name) {
-			hid_err(hdev,
-				"unable to retrieve the name of the device");
-			return;
-		}
-
-		devm_name = devm_kasprintf(&hdev->dev, GFP_KERNEL, "%s", name);
-		kfree(name);
-		if (!devm_name)
-			return;
+		if (name) {
+			devm_name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
+						   "%s", name);
+			kfree(name);
+			if (!devm_name)
+				return;
 
-		hidpp->name = devm_name;
+			hidpp->name = devm_name;
+		}
 	}
 
 	hidpp_initialize_battery(hidpp);
@@ -3188,7 +3425,7 @@ static void hidpp_connect_event(struct hidpp_device *hidpp)
 		return;
 	}
 
-	hidpp_populate_input(hidpp, input, false);
+	hidpp_populate_input(hidpp, input);
 
 	ret = input_register_device(input);
 	if (ret)
@@ -3208,6 +3445,60 @@ static const struct attribute_group ps_attribute_group = {
 	.attrs = sysfs_attrs
 };
 
+static int hidpp_get_report_length(struct hid_device *hdev, int id)
+{
+	struct hid_report_enum *re;
+	struct hid_report *report;
+
+	re = &(hdev->report_enum[HID_OUTPUT_REPORT]);
+	report = re->report_id_hash[id];
+	if (!report)
+		return 0;
+
+	return report->field[0]->report_count + 1;
+}
+
+static bool hidpp_validate_report(struct hid_device *hdev, int id,
+				  int expected_length, bool optional)
+{
+	int report_length;
+
+	if (id >= HID_MAX_IDS || id < 0) {
+		hid_err(hdev, "invalid HID report id %u\n", id);
+		return false;
+	}
+
+	report_length = hidpp_get_report_length(hdev, id);
+	if (!report_length)
+		return optional;
+
+	if (report_length < expected_length) {
+		hid_warn(hdev, "not enough values in hidpp report %d\n", id);
+		return false;
+	}
+
+	return true;
+}
+
+static bool hidpp_validate_device(struct hid_device *hdev)
+{
+	return hidpp_validate_report(hdev, REPORT_ID_HIDPP_SHORT,
+				     HIDPP_REPORT_SHORT_LENGTH, false) &&
+	       hidpp_validate_report(hdev, REPORT_ID_HIDPP_LONG,
+				     HIDPP_REPORT_LONG_LENGTH, true);
+}
+
+static bool hidpp_application_equals(struct hid_device *hdev,
+				     unsigned int application)
+{
+	struct list_head *report_list;
+	struct hid_report *report;
+
+	report_list = &hdev->report_enum[HID_INPUT_REPORT].report_list;
+	report = list_first_entry_or_null(report_list, struct hid_report, list);
+	return report && report->application == application;
+}
+
 static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
 	struct hidpp_device *hidpp;
@@ -3215,20 +3506,48 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	bool connected;
 	unsigned int connect_mask = HID_CONNECT_DEFAULT;
 
-	hidpp = devm_kzalloc(&hdev->dev, sizeof(struct hidpp_device),
-			GFP_KERNEL);
+	/* report_fixup needs drvdata to be set before we call hid_parse */
+	hidpp = devm_kzalloc(&hdev->dev, sizeof(*hidpp), GFP_KERNEL);
 	if (!hidpp)
 		return -ENOMEM;
 
 	hidpp->hid_dev = hdev;
 	hidpp->name = hdev->name;
+	hidpp->quirks = id->driver_data;
 	hid_set_drvdata(hdev, hidpp);
 
-	hidpp->quirks = id->driver_data;
+	ret = hid_parse(hdev);
+	if (ret) {
+		hid_err(hdev, "%s:parse failed\n", __func__);
+		return ret;
+	}
+
+	/*
+	 * Make sure the device is HID++ capable, otherwise treat as generic HID
+	 */
+	if (!hidpp_validate_device(hdev)) {
+		hid_set_drvdata(hdev, NULL);
+		devm_kfree(&hdev->dev, hidpp);
+		return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+	}
+
+	hidpp->very_long_report_length =
+		hidpp_get_report_length(hdev, REPORT_ID_HIDPP_VERY_LONG);
+	if (hidpp->very_long_report_length > HIDPP_REPORT_VERY_LONG_MAX_LENGTH)
+		hidpp->very_long_report_length = HIDPP_REPORT_VERY_LONG_MAX_LENGTH;
 
 	if (id->group == HID_GROUP_LOGITECH_DJ_DEVICE)
 		hidpp->quirks |= HIDPP_QUIRK_UNIFYING;
 
+	if (id->group == HID_GROUP_LOGITECH_27MHZ_DEVICE &&
+	    hidpp_application_equals(hdev, HID_GD_MOUSE))
+		hidpp->quirks |= HIDPP_QUIRK_HIDPP_WHEELS |
+				 HIDPP_QUIRK_HIDPP_EXTRA_MOUSE_BTNS;
+
+	if (id->group == HID_GROUP_LOGITECH_27MHZ_DEVICE &&
+	    hidpp_application_equals(hdev, HID_GD_KEYBOARD))
+		hidpp->quirks |= HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS;
+
 	if (disable_raw_mode) {
 		hidpp->quirks &= ~HIDPP_QUIRK_CLASS_WTP;
 		hidpp->quirks &= ~HIDPP_QUIRK_NO_HIDINPUT;
@@ -3237,15 +3556,11 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP) {
 		ret = wtp_allocate(hdev, id);
 		if (ret)
-			goto allocate_fail;
-	} else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560) {
-		ret = m560_allocate(hdev);
-		if (ret)
-			goto allocate_fail;
+			return ret;
 	} else if (hidpp->quirks & HIDPP_QUIRK_CLASS_K400) {
 		ret = k400_allocate(hdev);
 		if (ret)
-			goto allocate_fail;
+			return ret;
 	}
 
 	INIT_WORK(&hidpp->work, delayed_work_cb);
@@ -3258,93 +3573,79 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
 		hid_warn(hdev, "Cannot allocate sysfs group for %s\n",
 			 hdev->name);
 
-	ret = hid_parse(hdev);
+	/*
+	 * Plain USB connections need to actually call start and open
+	 * on the transport driver to allow incoming data.
+	 */
+	ret = hid_hw_start(hdev, 0);
 	if (ret) {
-		hid_err(hdev, "%s:parse failed\n", __func__);
-		goto hid_parse_fail;
+		hid_err(hdev, "hw start failed\n");
+		goto hid_hw_start_fail;
 	}
 
-	if (hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT)
-		connect_mask &= ~HID_CONNECT_HIDINPUT;
-
-	if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
-		ret = hid_hw_start(hdev, connect_mask);
-		if (ret) {
-			hid_err(hdev, "hw start failed\n");
-			goto hid_hw_start_fail;
-		}
-		ret = hid_hw_open(hdev);
-		if (ret < 0) {
-			dev_err(&hdev->dev, "%s:hid_hw_open returned error:%d\n",
-				__func__, ret);
-			hid_hw_stop(hdev);
-			goto hid_hw_start_fail;
-		}
+	ret = hid_hw_open(hdev);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "%s:hid_hw_open returned error:%d\n",
+			__func__, ret);
+		hid_hw_stop(hdev);
+		goto hid_hw_open_fail;
 	}
 
-
 	/* Allow incoming packets */
 	hid_device_io_start(hdev);
 
 	if (hidpp->quirks & HIDPP_QUIRK_UNIFYING)
 		hidpp_unifying_init(hidpp);
 
-	connected = hidpp_is_connected(hidpp);
+	connected = hidpp_root_get_protocol_version(hidpp) == 0;
 	atomic_set(&hidpp->connected, connected);
 	if (!(hidpp->quirks & HIDPP_QUIRK_UNIFYING)) {
 		if (!connected) {
 			ret = -ENODEV;
 			hid_err(hdev, "Device not connected");
-			goto hid_hw_open_failed;
+			goto hid_hw_init_fail;
 		}
 
-		hid_info(hdev, "HID++ %u.%u device connected.\n",
-			 hidpp->protocol_major, hidpp->protocol_minor);
-
 		hidpp_overwrite_name(hdev);
 	}
 
 	if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)) {
 		ret = wtp_get_config(hidpp);
 		if (ret)
-			goto hid_hw_open_failed;
+			goto hid_hw_init_fail;
 	} else if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_G920)) {
 		ret = g920_get_config(hidpp);
 		if (ret)
-			goto hid_hw_open_failed;
+			goto hid_hw_init_fail;
 	}
 
-	/* Block incoming packets */
-	hid_device_io_stop(hdev);
+	hidpp_connect_event(hidpp);
 
-	if (!(hidpp->quirks & HIDPP_QUIRK_CLASS_G920)) {
-		ret = hid_hw_start(hdev, connect_mask);
-		if (ret) {
-			hid_err(hdev, "%s:hid_hw_start returned error\n", __func__);
-			goto hid_hw_start_fail;
-		}
-	}
+	/* Reset the HID node state */
+	hid_device_io_stop(hdev);
+	hid_hw_close(hdev);
+	hid_hw_stop(hdev);
 
-	/* Allow incoming packets */
-	hid_device_io_start(hdev);
+	if (hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT)
+		connect_mask &= ~HID_CONNECT_HIDINPUT;
 
-	hidpp_connect_event(hidpp);
+	/* Now export the actual inputs and hidraw nodes to the world */
+	ret = hid_hw_start(hdev, connect_mask);
+	if (ret) {
+		hid_err(hdev, "%s:hid_hw_start returned error\n", __func__);
+		goto hid_hw_start_fail;
+	}
 
 	return ret;
 
-hid_hw_open_failed:
-	hid_device_io_stop(hdev);
-	if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
-		hid_hw_close(hdev);
-		hid_hw_stop(hdev);
-	}
+hid_hw_init_fail:
+	hid_hw_close(hdev);
+hid_hw_open_fail:
+	hid_hw_stop(hdev);
 hid_hw_start_fail:
-hid_parse_fail:
 	sysfs_remove_group(&hdev->dev.kobj, &ps_attribute_group);
 	cancel_work_sync(&hidpp->work);
 	mutex_destroy(&hidpp->send_mutex);
-allocate_fail:
-	hid_set_drvdata(hdev, NULL);
 	return ret;
 }
 
@@ -3352,12 +3653,14 @@ static void hidpp_remove(struct hid_device *hdev)
 {
 	struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 
+	if (!hidpp)
+		return hid_hw_stop(hdev);
+
 	sysfs_remove_group(&hdev->dev.kobj, &ps_attribute_group);
 
-	if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
+	if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920)
 		hidpp_ff_deinit(hdev);
-		hid_hw_close(hdev);
-	}
+
 	hid_hw_stop(hdev);
 	cancel_work_sync(&hidpp->work);
 	mutex_destroy(&hidpp->send_mutex);
@@ -3367,6 +3670,10 @@ static void hidpp_remove(struct hid_device *hdev)
 	HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE, \
 		   USB_VENDOR_ID_LOGITECH, (product))
 
+#define L27MHZ_DEVICE(product) \
+	HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_27MHZ_DEVICE, \
+		   USB_VENDOR_ID_LOGITECH, (product))
+
 static const struct hid_device_id hidpp_devices[] = {
 	{ /* wireless touchpad */
 	  LDJ_DEVICE(0x4011),
@@ -3418,11 +3725,46 @@ static const struct hid_device_id hidpp_devices[] = {
 	{ /* Solar Keyboard Logitech K750 */
 	  LDJ_DEVICE(0x4002),
 	  .driver_data = HIDPP_QUIRK_CLASS_K750 },
+	{ /* Keyboard MX5000 (Bluetooth-receiver in HID proxy mode) */
+	  LDJ_DEVICE(0xb305),
+	  .driver_data = HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS },
+	{ /* Keyboard MX5500 (Bluetooth-receiver in HID proxy mode) */
+	  LDJ_DEVICE(0xb30b),
+	  .driver_data = HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS },
 
 	{ LDJ_DEVICE(HID_ANY_ID) },
 
-	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G920_WHEEL),
+	{ /* Keyboard LX501 (Y-RR53) */
+	  L27MHZ_DEVICE(0x0049),
+	  .driver_data = HIDPP_QUIRK_KBD_ZOOM_WHEEL },
+	{ /* Keyboard MX3000 (Y-RAM74) */
+	  L27MHZ_DEVICE(0x0057),
+	  .driver_data = HIDPP_QUIRK_KBD_SCROLL_WHEEL },
+	{ /* Keyboard MX3200 (Y-RAV80) */
+	  L27MHZ_DEVICE(0x005c),
+	  .driver_data = HIDPP_QUIRK_KBD_ZOOM_WHEEL },
+	{ /* S510 Media Remote */
+	  L27MHZ_DEVICE(0x00fe),
+	  .driver_data = HIDPP_QUIRK_KBD_SCROLL_WHEEL },
+
+	{ L27MHZ_DEVICE(HID_ANY_ID) },
+
+	{ /* Logitech G403 Gaming Mouse over USB */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 0xC082) },
+	{ /* Logitech G700 Gaming Mouse over USB */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 0xC06B) },
+	{ /* Logitech G900 Gaming Mouse over USB */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 0xC081) },
+	{ /* Logitech G920 Wheel over USB */
+	  HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G920_WHEEL),
 		.driver_data = HIDPP_QUIRK_CLASS_G920 | HIDPP_QUIRK_FORCE_OUTPUT_REPORTS},
+
+	{ /* MX5000 keyboard over Bluetooth */
+	  HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb305),
+	  .driver_data = HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS },
+	{ /* MX5500 keyboard over Bluetooth */
+	  HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb30b),
+	  .driver_data = HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS },
 	{}
 };
 
@@ -3436,6 +3778,7 @@ static const struct hid_usage_id hidpp_usages[] = {
 static struct hid_driver hidpp_driver = {
 	.name = "logitech-hidpp-device",
 	.id_table = hidpp_devices,
+	.report_fixup = hidpp_report_fixup,
 	.probe = hidpp_probe,
 	.remove = hidpp_remove,
 	.raw_event = hidpp_raw_event,
diff --git a/drivers/hid/hid-macally.c b/drivers/hid/hid-macally.c
new file mode 100644
index 000000000000..9a4fc7dffb14
--- /dev/null
+++ b/drivers/hid/hid-macally.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  HID driver for quirky Macally devices
+ *
+ *  Copyright (c) 2019 Alex Henrie <alexhenrie24@gmail.com>
+ */
+
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+MODULE_AUTHOR("Alex Henrie <alexhenrie24@gmail.com>");
+MODULE_DESCRIPTION("Macally devices");
+MODULE_LICENSE("GPL");
+
+/*
+ * The Macally ikey keyboard says that its logical and usage maximums are both
+ * 101, but the power key is 102 and the equals key is 103
+ */
+static __u8 *macally_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+				 unsigned int *rsize)
+{
+	if (*rsize >= 60 && rdesc[53] == 0x65 && rdesc[59] == 0x65) {
+		hid_info(hdev,
+			"fixing up Macally ikey keyboard report descriptor\n");
+		rdesc[53] = rdesc[59] = 0x67;
+	}
+	return rdesc;
+}
+
+static struct hid_device_id macally_id_table[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SOLID_YEAR,
+			 USB_DEVICE_ID_MACALLY_IKEY_KEYBOARD) },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, macally_id_table);
+
+static struct hid_driver macally_driver = {
+	.name			= "macally",
+	.id_table		= macally_id_table,
+	.report_fixup		= macally_report_fixup,
+};
+
+module_hid_driver(macally_driver);
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index 1d5ea678d268..34138667f8af 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Apple "Magic" Wireless Mouse driver
  *
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/hid/hid-mf.c b/drivers/hid/hid-mf.c
index 03f10516131d..fc75f30f537c 100644
--- a/drivers/hid/hid-mf.c
+++ b/drivers/hid/hid-mf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Force feedback support for Mayflash game controller adapters.
  *
@@ -17,15 +18,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/input.h>
diff --git a/drivers/hid/hid-microsoft.c b/drivers/hid/hid-microsoft.c
index 330cb073cb66..8b3a922bdad3 100644
--- a/drivers/hid/hid-microsoft.c
+++ b/drivers/hid/hid-microsoft.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some microsoft "special" devices
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-monterey.c b/drivers/hid/hid-monterey.c
index 25daf28b26bd..c63f9f1e61b8 100644
--- a/drivers/hid/hid-monterey.c
+++ b/drivers/hid/hid-monterey.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some monterey "special" devices
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index c02d4cad1893..b603c14d043b 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for multitouch panels
  *
@@ -17,14 +18,9 @@
  *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
  *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
  *  Copyright (c) 2010      Canonical, Ltd.
- *
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
@@ -641,6 +637,13 @@ static void mt_store_field(struct hid_device *hdev,
 	if (*target != DEFAULT_TRUE &&
 	    *target != DEFAULT_FALSE &&
 	    *target != DEFAULT_ZERO) {
+		if (usage->contactid == DEFAULT_ZERO ||
+		    usage->x == DEFAULT_ZERO ||
+		    usage->y == DEFAULT_ZERO) {
+			hid_dbg(hdev,
+				"ignoring duplicate usage on incomplete");
+			return;
+		}
 		usage = mt_allocate_usage(hdev, application);
 		if (!usage)
 			return;
@@ -1773,6 +1776,10 @@ static const struct hid_device_id mt_devices[] = {
 		HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
 			USB_VENDOR_ID_ALPS_JP,
 			HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
+	{ .driver_data = MT_CLS_WIN_8_DUAL,
+		HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
+			USB_VENDOR_ID_ALPS_JP,
+			HID_DEVICE_ID_ALPS_1222) },
 
 	/* Lenovo X1 TAB Gen 2 */
 	{ .driver_data = MT_CLS_WIN_8_DUAL,
diff --git a/drivers/hid/hid-nti.c b/drivers/hid/hid-nti.c
index 5bb827b223ba..1952e9ca5f45 100644
--- a/drivers/hid/hid-nti.c
+++ b/drivers/hid/hid-nti.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  USB HID quirks support for Network Technologies, Inc. "USB-SUN" USB
  *  adapter for pre-USB Sun keyboards
@@ -13,10 +14,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c
index 9bc6f4867cb3..b5d26f03fe6b 100644
--- a/drivers/hid/hid-ntrig.c
+++ b/drivers/hid/hid-ntrig.c
@@ -1,16 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for N-Trig touchscreens
  *
  *  Copyright (c) 2008-2010 Rafi Rubin
  *  Copyright (c) 2009-2010 Stephane Chatty
- *
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-ortek.c b/drivers/hid/hid-ortek.c
index 8783a064cdcf..9a4770d79c64 100644
--- a/drivers/hid/hid-ortek.c
+++ b/drivers/hid/hid-ortek.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for various devices which are apparently based on the same chipset
  *  from certain vendor which produces chips that contain wrong LogicalMaximum
@@ -13,10 +14,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-penmount.c b/drivers/hid/hid-penmount.c
index d90383f788e2..b9edc8e758fd 100644
--- a/drivers/hid/hid-penmount.c
+++ b/drivers/hid/hid-penmount.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for PenMount touchscreens
  *
@@ -8,10 +9,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/module.h>
diff --git a/drivers/hid/hid-petalynx.c b/drivers/hid/hid-petalynx.c
index 6aca4f2554bf..ea0af9f7ad90 100644
--- a/drivers/hid/hid-petalynx.c
+++ b/drivers/hid/hid-petalynx.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some petalynx "special" devices
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-picolcd.h b/drivers/hid/hid-picolcd.h
index e56d847b2ef1..57c9d0a6757c 100644
--- a/drivers/hid/hid-picolcd.h
+++ b/drivers/hid/hid-picolcd.h
@@ -1,20 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /***************************************************************************
  *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
  *                                                                         *
  *   Based on Logitech G13 driver (v0.4)                                   *
  *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
  *                                                                         *
- *   This program is free software: you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation, version 2 of the License.               *
- *                                                                         *
- *   This driver is distributed in the hope that it will be useful, but    *
- *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
- *   General Public License for more details.                              *
- *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
  ***************************************************************************/
 
 #define PICOLCD_NAME "PicoLCD (graphic)"
diff --git a/drivers/hid/hid-picolcd_backlight.c b/drivers/hid/hid-picolcd_backlight.c
index 808807ad388f..5bd2a8c4bbd6 100644
--- a/drivers/hid/hid-picolcd_backlight.c
+++ b/drivers/hid/hid-picolcd_backlight.c
@@ -1,20 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /***************************************************************************
  *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
  *                                                                         *
  *   Based on Logitech G13 driver (v0.4)                                   *
  *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
  *                                                                         *
- *   This program is free software: you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation, version 2 of the License.               *
- *                                                                         *
- *   This driver is distributed in the hope that it will be useful, but    *
- *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
- *   General Public License for more details.                              *
- *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
  ***************************************************************************/
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-picolcd_cir.c b/drivers/hid/hid-picolcd_cir.c
index bf6f29ca3315..34da38d5b0cd 100644
--- a/drivers/hid/hid-picolcd_cir.c
+++ b/drivers/hid/hid-picolcd_cir.c
@@ -1,20 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /***************************************************************************
  *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
  *                                                                         *
  *   Based on Logitech G13 driver (v0.4)                                   *
  *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
  *                                                                         *
- *   This program is free software: you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation, version 2 of the License.               *
- *                                                                         *
- *   This driver is distributed in the hope that it will be useful, but    *
- *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
- *   General Public License for more details.                              *
- *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
  ***************************************************************************/
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c
index c1b29a9eb41a..5f7a39a5d4af 100644
--- a/drivers/hid/hid-picolcd_core.c
+++ b/drivers/hid/hid-picolcd_core.c
@@ -1,20 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /***************************************************************************
  *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
  *                                                                         *
  *   Based on Logitech G13 driver (v0.4)                                   *
  *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
  *                                                                         *
- *   This program is free software: you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation, version 2 of the License.               *
- *                                                                         *
- *   This driver is distributed in the hope that it will be useful, but    *
- *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
- *   General Public License for more details.                              *
- *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
  ***************************************************************************/
 
 #include <linux/hid.h>
@@ -28,6 +18,7 @@
 #include <linux/completion.h>
 #include <linux/uaccess.h>
 #include <linux/module.h>
+#include <linux/string.h>
 
 #include "hid-picolcd.h"
 
@@ -275,27 +266,20 @@ static ssize_t picolcd_operation_mode_store(struct device *dev,
 {
 	struct picolcd_data *data = dev_get_drvdata(dev);
 	struct hid_report *report = NULL;
-	size_t cnt = count;
 	int timeout = data->opmode_delay;
 	unsigned long flags;
 
-	if (cnt >= 3 && strncmp("lcd", buf, 3) == 0) {
+	if (sysfs_streq(buf, "lcd")) {
 		if (data->status & PICOLCD_BOOTLOADER)
 			report = picolcd_out_report(REPORT_EXIT_FLASHER, data->hdev);
-		buf += 3;
-		cnt -= 3;
-	} else if (cnt >= 10 && strncmp("bootloader", buf, 10) == 0) {
+	} else if (sysfs_streq(buf, "bootloader")) {
 		if (!(data->status & PICOLCD_BOOTLOADER))
 			report = picolcd_out_report(REPORT_EXIT_KEYBOARD, data->hdev);
-		buf += 10;
-		cnt -= 10;
-	}
-	if (!report || report->maxfield != 1)
+	} else {
 		return -EINVAL;
+	}
 
-	while (cnt > 0 && (buf[cnt-1] == '\n' || buf[cnt-1] == '\r'))
-		cnt--;
-	if (cnt != 0)
+	if (!report || report->maxfield != 1)
 		return -EINVAL;
 
 	spin_lock_irqsave(&data->lock, flags);
diff --git a/drivers/hid/hid-picolcd_debugfs.c b/drivers/hid/hid-picolcd_debugfs.c
index 3e0feb4bb538..d01176da8896 100644
--- a/drivers/hid/hid-picolcd_debugfs.c
+++ b/drivers/hid/hid-picolcd_debugfs.c
@@ -1,20 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /***************************************************************************
  *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
  *                                                                         *
  *   Based on Logitech G13 driver (v0.4)                                   *
  *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
  *                                                                         *
- *   This program is free software: you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation, version 2 of the License.               *
- *                                                                         *
- *   This driver is distributed in the hope that it will be useful, but    *
- *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
- *   General Public License for more details.                              *
- *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
  ***************************************************************************/
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-picolcd_fb.c b/drivers/hid/hid-picolcd_fb.c
index 864a084b6cba..6897e14e7cb7 100644
--- a/drivers/hid/hid-picolcd_fb.c
+++ b/drivers/hid/hid-picolcd_fb.c
@@ -1,20 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /***************************************************************************
  *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
  *                                                                         *
  *   Based on Logitech G13 driver (v0.4)                                   *
  *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
  *                                                                         *
- *   This program is free software: you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation, version 2 of the License.               *
- *                                                                         *
- *   This driver is distributed in the hope that it will be useful, but    *
- *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
- *   General Public License for more details.                              *
- *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
  ***************************************************************************/
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-picolcd_lcd.c b/drivers/hid/hid-picolcd_lcd.c
index 22dcbe13da89..0c4b76de8ae5 100644
--- a/drivers/hid/hid-picolcd_lcd.c
+++ b/drivers/hid/hid-picolcd_lcd.c
@@ -1,20 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /***************************************************************************
  *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
  *                                                                         *
  *   Based on Logitech G13 driver (v0.4)                                   *
  *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
  *                                                                         *
- *   This program is free software: you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation, version 2 of the License.               *
- *                                                                         *
- *   This driver is distributed in the hope that it will be useful, but    *
- *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
- *   General Public License for more details.                              *
- *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
  ***************************************************************************/
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-picolcd_leds.c b/drivers/hid/hid-picolcd_leds.c
index a802b4f49c7b..6b505a753511 100644
--- a/drivers/hid/hid-picolcd_leds.c
+++ b/drivers/hid/hid-picolcd_leds.c
@@ -1,20 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /***************************************************************************
  *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
  *                                                                         *
  *   Based on Logitech G13 driver (v0.4)                                   *
  *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
  *                                                                         *
- *   This program is free software: you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation, version 2 of the License.               *
- *                                                                         *
- *   This driver is distributed in the hope that it will be useful, but    *
- *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
- *   General Public License for more details.                              *
- *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
  ***************************************************************************/
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-pl.c b/drivers/hid/hid-pl.c
index 2dcd7d98dbd6..93fb07ec3180 100644
--- a/drivers/hid/hid-pl.c
+++ b/drivers/hid/hid-pl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Force feedback support for PantherLord/GreenAsia based devices
  *
@@ -20,19 +21,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 
diff --git a/drivers/hid/hid-plantronics.c b/drivers/hid/hid-plantronics.c
index 584b10d3fc3d..85b685efc12f 100644
--- a/drivers/hid/hid-plantronics.c
+++ b/drivers/hid/hid-plantronics.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Plantronics USB HID Driver
  *
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include "hid-ids.h"
diff --git a/drivers/hid/hid-primax.c b/drivers/hid/hid-primax.c
index 3a1c3c4c50dc..1e6413d07cae 100644
--- a/drivers/hid/hid-primax.c
+++ b/drivers/hid/hid-primax.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * HID driver for primax and similar keyboards with in-band modifiers
  *
@@ -5,15 +6,6 @@
  *
  * Author:
  *	Terry Lambert <tlambert@google.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-prodikeys.c b/drivers/hid/hid-prodikeys.c
index 87eda34ea2f8..21544ebff855 100644
--- a/drivers/hid/hid-prodikeys.c
+++ b/drivers/hid/hid-prodikeys.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for the Prodikeys PC-MIDI Keyboard
  *  providing midi & extra multimedia keys functionality
@@ -6,14 +7,9 @@
  *
  *  Controls for Octave Shift Up/Down, Channel, and
  *  Sustain Duration available via sysfs.
- *
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index 3afb8fa5a1ac..9aa3a92a3ba9 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID quirks support for Linux
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/hid.h>
@@ -46,6 +43,7 @@ static const struct hid_device_id hid_quirks[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_UC100KM), HID_QUIRK_NOGET },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_MULTI_TOUCH), HID_QUIRK_MULTI_INPUT },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_PIXART_USB_OPTICAL_MOUSE), HID_QUIRK_ALWAYS_POLL },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_PIXART_USB_OPTICAL_MOUSE2), HID_QUIRK_ALWAYS_POLL },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS), HID_QUIRK_MULTI_INPUT },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHIC, USB_DEVICE_ID_CHIC_GAMEPAD), HID_QUIRK_BADPAD },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_3AXIS_5BUTTON_STICK), HID_QUIRK_NOGET },
@@ -433,7 +431,6 @@ static const struct hid_device_id hid_have_special_driver[] = {
 #if IS_ENABLED(CONFIG_HID_LOGITECH)
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RECEIVER) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_DESKTOP) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_EDGE) },
@@ -465,13 +462,8 @@ static const struct hid_device_id hid_have_special_driver[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACENAVIGATOR) },
 #endif
 #if IS_ENABLED(CONFIG_HID_LOGITECH_HIDPP)
-	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_T651) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G920_WHEEL) },
 #endif
-#if IS_ENABLED(CONFIG_HID_LOGITECH_DJ)
-	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2) },
-#endif
 #if IS_ENABLED(CONFIG_HID_MAGICMOUSE)
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICMOUSE) },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICTRACKPAD) },
diff --git a/drivers/hid/hid-retrode.c b/drivers/hid/hid-retrode.c
index 30cc7ebb4d75..6a08e25aa296 100644
--- a/drivers/hid/hid-retrode.c
+++ b/drivers/hid/hid-retrode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Retrode 2 controller adapter and plug-in extensions
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/input.h>
diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
index 9e33165250a3..7c6abd7e0979 100644
--- a/drivers/hid/hid-rmi.c
+++ b/drivers/hid/hid-rmi.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright (c) 2013 Andrew Duggan <aduggan@synaptics.com>
  *  Copyright (c) 2013 Synaptics Incorporated
  *  Copyright (c) 2014 Benjamin Tissoires <benjamin.tissoires@gmail.com>
  *  Copyright (c) 2014 Red Hat, Inc
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/kernel.h>
@@ -39,6 +35,7 @@
 /* device flags */
 #define RMI_DEVICE			BIT(0)
 #define RMI_DEVICE_HAS_PHYS_BUTTONS	BIT(1)
+#define RMI_DEVICE_OUTPUT_SET_REPORT	BIT(2)
 
 /*
  * retrieve the ctrl registers
@@ -167,9 +164,19 @@ static int rmi_set_mode(struct hid_device *hdev, u8 mode)
 
 static int rmi_write_report(struct hid_device *hdev, u8 *report, int len)
 {
+	struct rmi_data *data = hid_get_drvdata(hdev);
 	int ret;
 
-	ret = hid_hw_output_report(hdev, (void *)report, len);
+	if (data->device_flags & RMI_DEVICE_OUTPUT_SET_REPORT) {
+		/*
+		 * Talk to device by using SET_REPORT requests instead.
+		 */
+		ret = hid_hw_raw_request(hdev, report[0], report,
+				len, HID_OUTPUT_REPORT, HID_REQ_SET_REPORT);
+	} else {
+		ret = hid_hw_output_report(hdev, (void *)report, len);
+	}
+
 	if (ret < 0) {
 		dev_err(&hdev->dev, "failed to write hid report (%d)\n", ret);
 		return ret;
@@ -751,6 +758,8 @@ static const struct hid_device_id rmi_id[] = {
 		.driver_data = RMI_DEVICE_HAS_PHYS_BUTTONS },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X1_COVER) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_REZEL) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5),
+		.driver_data = RMI_DEVICE_OUTPUT_SET_REPORT },
 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID) },
 	{ }
 };
diff --git a/drivers/hid/hid-roccat-arvo.c b/drivers/hid/hid-roccat-arvo.c
index 329c5d1270f9..ffcd444ae2ba 100644
--- a/drivers/hid/hid-roccat-arvo.c
+++ b/drivers/hid/hid-roccat-arvo.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat Arvo driver for Linux
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
diff --git a/drivers/hid/hid-roccat-arvo.h b/drivers/hid/hid-roccat-arvo.h
index ce8415e4f009..052562fa9027 100644
--- a/drivers/hid/hid-roccat-arvo.h
+++ b/drivers/hid/hid-roccat-arvo.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __HID_ROCCAT_ARVO_H
 #define __HID_ROCCAT_ARVO_H
 
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/types.h>
diff --git a/drivers/hid/hid-roccat-common.c b/drivers/hid/hid-roccat-common.c
index 8155ac5fede2..4465ef95d32a 100644
--- a/drivers/hid/hid-roccat-common.c
+++ b/drivers/hid/hid-roccat-common.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat common functions for device specific drivers
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-roccat-common.h b/drivers/hid/hid-roccat-common.h
index eaa56eb7d5d1..839ddfd931f0 100644
--- a/drivers/hid/hid-roccat-common.h
+++ b/drivers/hid/hid-roccat-common.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __HID_ROCCAT_COMMON_H
 #define __HID_ROCCAT_COMMON_H
 
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/usb.h>
diff --git a/drivers/hid/hid-roccat-isku.c b/drivers/hid/hid-roccat-isku.c
index 02db537f8f3e..ce5f22519956 100644
--- a/drivers/hid/hid-roccat-isku.c
+++ b/drivers/hid/hid-roccat-isku.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat Isku driver for Linux
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
diff --git a/drivers/hid/hid-roccat-isku.h b/drivers/hid/hid-roccat-isku.h
index 53056860d4d8..0779d72e4e2f 100644
--- a/drivers/hid/hid-roccat-isku.h
+++ b/drivers/hid/hid-roccat-isku.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __HID_ROCCAT_ISKU_H
 #define __HID_ROCCAT_ISKU_H
 
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/types.h>
diff --git a/drivers/hid/hid-roccat-kone.c b/drivers/hid/hid-roccat-kone.c
index c4dd6162c1d6..1a6e600197d0 100644
--- a/drivers/hid/hid-roccat-kone.c
+++ b/drivers/hid/hid-roccat-kone.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat Kone driver for Linux
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
diff --git a/drivers/hid/hid-roccat-kone.h b/drivers/hid/hid-roccat-kone.h
index 52c6167d023e..4a1a9cb76b08 100644
--- a/drivers/hid/hid-roccat-kone.h
+++ b/drivers/hid/hid-roccat-kone.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __HID_ROCCAT_KONE_H
 #define __HID_ROCCAT_KONE_H
 
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/types.h>
diff --git a/drivers/hid/hid-roccat-koneplus.c b/drivers/hid/hid-roccat-koneplus.c
index 09e8fc72aa1d..0316edf8c5bb 100644
--- a/drivers/hid/hid-roccat-koneplus.c
+++ b/drivers/hid/hid-roccat-koneplus.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat Kone[+] driver for Linux
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
diff --git a/drivers/hid/hid-roccat-koneplus.h b/drivers/hid/hid-roccat-koneplus.h
index af7f57e8cf3b..8ce7bb7df7f1 100644
--- a/drivers/hid/hid-roccat-koneplus.h
+++ b/drivers/hid/hid-roccat-koneplus.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __HID_ROCCAT_KONEPLUS_H
 #define __HID_ROCCAT_KONEPLUS_H
 
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/types.h>
diff --git a/drivers/hid/hid-roccat-konepure.c b/drivers/hid/hid-roccat-konepure.c
index 07de2f9014c6..5248b3c7cf78 100644
--- a/drivers/hid/hid-roccat-konepure.c
+++ b/drivers/hid/hid-roccat-konepure.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat KonePure driver for Linux
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
diff --git a/drivers/hid/hid-roccat-kovaplus.c b/drivers/hid/hid-roccat-kovaplus.c
index 317c9c2c0a7c..960012881570 100644
--- a/drivers/hid/hid-roccat-kovaplus.c
+++ b/drivers/hid/hid-roccat-kovaplus.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat Kova[+] driver for Linux
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
diff --git a/drivers/hid/hid-roccat-kovaplus.h b/drivers/hid/hid-roccat-kovaplus.h
index fbb7a16a7e54..5eccae69e668 100644
--- a/drivers/hid/hid-roccat-kovaplus.h
+++ b/drivers/hid/hid-roccat-kovaplus.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __HID_ROCCAT_KOVAPLUS_H
 #define __HID_ROCCAT_KOVAPLUS_H
 
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/types.h>
diff --git a/drivers/hid/hid-roccat-lua.c b/drivers/hid/hid-roccat-lua.c
index ac1a7313e259..4a88a76d5c62 100644
--- a/drivers/hid/hid-roccat-lua.c
+++ b/drivers/hid/hid-roccat-lua.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat Lua driver for Linux
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
diff --git a/drivers/hid/hid-roccat-lua.h b/drivers/hid/hid-roccat-lua.h
index 547d77a375d1..1495e535e86a 100644
--- a/drivers/hid/hid-roccat-lua.h
+++ b/drivers/hid/hid-roccat-lua.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __HID_ROCCAT_LUA_H
 #define __HID_ROCCAT_LUA_H
 
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/types.h>
diff --git a/drivers/hid/hid-roccat-pyra.c b/drivers/hid/hid-roccat-pyra.c
index b30aa7b82bf8..989927defe8d 100644
--- a/drivers/hid/hid-roccat-pyra.c
+++ b/drivers/hid/hid-roccat-pyra.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat Pyra driver for Linux
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
diff --git a/drivers/hid/hid-roccat-pyra.h b/drivers/hid/hid-roccat-pyra.h
index beedcf001ceb..7fc61006e8b0 100644
--- a/drivers/hid/hid-roccat-pyra.h
+++ b/drivers/hid/hid-roccat-pyra.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __HID_ROCCAT_PYRA_H
 #define __HID_ROCCAT_PYRA_H
 
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/types.h>
diff --git a/drivers/hid/hid-roccat-ryos.c b/drivers/hid/hid-roccat-ryos.c
index 47cc8f30ff6d..3956a6c9c521 100644
--- a/drivers/hid/hid-roccat-ryos.c
+++ b/drivers/hid/hid-roccat-ryos.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat Ryos driver for Linux
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/types.h>
diff --git a/drivers/hid/hid-roccat-savu.c b/drivers/hid/hid-roccat-savu.c
index 6dbf6e04dce7..818701f7a028 100644
--- a/drivers/hid/hid-roccat-savu.c
+++ b/drivers/hid/hid-roccat-savu.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat Savu driver for Linux
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /* Roccat Savu is a gamer mouse with macro keys that can be configured in
diff --git a/drivers/hid/hid-roccat-savu.h b/drivers/hid/hid-roccat-savu.h
index d23217bd2b86..c83423dc56fe 100644
--- a/drivers/hid/hid-roccat-savu.h
+++ b/drivers/hid/hid-roccat-savu.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __HID_ROCCAT_SAVU_H
 #define __HID_ROCCAT_SAVU_H
 
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/types.h>
diff --git a/drivers/hid/hid-roccat.c b/drivers/hid/hid-roccat.c
index 5be8de70c651..26373b82fe81 100644
--- a/drivers/hid/hid-roccat.c
+++ b/drivers/hid/hid-roccat.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Roccat driver for Linux
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
diff --git a/drivers/hid/hid-saitek.c b/drivers/hid/hid-saitek.c
index 683861f324e3..c7bf14c01960 100644
--- a/drivers/hid/hid-saitek.c
+++ b/drivers/hid/hid-saitek.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Saitek devices.
  *
@@ -11,14 +12,9 @@
  *  Fixes the mode button which cycles through three constantly pressed
  *  buttons. All three press events are mapped to one button and the
  *  missing release event is generated immediately.
- *
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-samsung.c b/drivers/hid/hid-samsung.c
index 7cbb067d4a9e..2e1c31156eca 100644
--- a/drivers/hid/hid-samsung.c
+++ b/drivers/hid/hid-samsung.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some samsung "special" devices
  *
@@ -8,7 +9,6 @@
  *  Copyright (c) 2008 Jiri Slaby
  *  Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk>
  *
- *
  *  This driver supports several HID devices:
  *
  *  [0419:0001] Samsung IrDA remote controller (reports as Cypress USB Mouse).
@@ -17,14 +17,9 @@
  *  [0419:0600] Creative Desktop Wireless 6000 keyboard/mouse combo
  *	several key mappings used from the consumer usage page
  *	deviate from the USB HUT 1.12 standard.
- *
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c
index bb012bc032e0..c60f82673cf2 100644
--- a/drivers/hid/hid-sensor-custom.c
+++ b/drivers/hid/hid-sensor-custom.c
@@ -1,15 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * hid-sensor-custom.c
  * Copyright (c) 2015, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
  */
 
 #include <linux/kernel.h>
@@ -157,8 +149,7 @@ static int usage_id_cmp(const void *p1, const void *p2)
 static ssize_t enable_sensor_show(struct device *dev,
 				  struct device_attribute *attr, char *buf)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct hid_sensor_custom *sensor_inst = platform_get_drvdata(pdev);
+	struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
 
 	return sprintf(buf, "%d\n", sensor_inst->enable);
 }
@@ -237,8 +228,7 @@ static ssize_t enable_sensor_store(struct device *dev,
 				   struct device_attribute *attr,
 				   const char *buf, size_t count)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct hid_sensor_custom *sensor_inst = platform_get_drvdata(pdev);
+	struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
 	int value;
 	int ret = -EINVAL;
 
@@ -283,8 +273,7 @@ static const struct attribute_group enable_sensor_attr_group = {
 static ssize_t show_value(struct device *dev, struct device_attribute *attr,
 			  char *buf)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct hid_sensor_custom *sensor_inst = platform_get_drvdata(pdev);
+	struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
 	struct hid_sensor_hub_attribute_info *attribute;
 	int index, usage, field_index;
 	char name[HID_CUSTOM_NAME_LENGTH];
@@ -392,8 +381,7 @@ static ssize_t show_value(struct device *dev, struct device_attribute *attr,
 static ssize_t store_value(struct device *dev, struct device_attribute *attr,
 			   const char *buf, size_t count)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct hid_sensor_custom *sensor_inst = platform_get_drvdata(pdev);
+	struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
 	int index, field_index, usage;
 	char name[HID_CUSTOM_NAME_LENGTH];
 	int value;
diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c
index 4256fdc5cd6d..be92a6f79687 100644
--- a/drivers/hid/hid-sensor-hub.c
+++ b/drivers/hid/hid-sensor-hub.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * HID Sensors Driver
  * Copyright (c) 2012, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-sjoy.c b/drivers/hid/hid-sjoy.c
index 36b6470af947..49971be7c3ff 100644
--- a/drivers/hid/hid-sjoy.c
+++ b/drivers/hid/hid-sjoy.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Force feedback support for SmartJoy PLUS PS2->USB adapter
  *
@@ -9,19 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 /* #define DEBUG */
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 26fae90b931a..93942063b51b 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Sony / PS2 / PS3 / PS4 BD devices.
  *
@@ -13,10 +14,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
diff --git a/drivers/hid/hid-speedlink.c b/drivers/hid/hid-speedlink.c
index 7112f3e832ee..9e75f1aae0ca 100644
--- a/drivers/hid/hid-speedlink.c
+++ b/drivers/hid/hid-speedlink.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Speedlink Vicious and Divine Cezanne (USB mouse).
  *  Fixes "jumpy" cursor and removes nonexistent keyboard LEDS from
@@ -7,10 +8,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-steelseries.c b/drivers/hid/hid-steelseries.c
index ec18768b124a..37353c41cba7 100644
--- a/drivers/hid/hid-steelseries.c
+++ b/drivers/hid/hid-steelseries.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Steelseries SRW-S1
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-sunplus.c b/drivers/hid/hid-sunplus.c
index 91072fa54663..aa2855c2ed4e 100644
--- a/drivers/hid/hid-sunplus.c
+++ b/drivers/hid/hid-sunplus.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for some sunplus "special" devices
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-tivo.c b/drivers/hid/hid-tivo.c
index d98696927453..68eb08b63945 100644
--- a/drivers/hid/hid-tivo.c
+++ b/drivers/hid/hid-tivo.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for TiVo Slide Bluetooth remote
  *
@@ -6,10 +7,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-tmff.c b/drivers/hid/hid-tmff.c
index bea8def64f43..e12f2588ddeb 100644
--- a/drivers/hid/hid-tmff.c
+++ b/drivers/hid/hid-tmff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Force feedback support for various HID compliant devices by ThrustMaster:
  *    ThrustMaster FireStorm Dual Power 2
@@ -12,19 +13,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/hid.h>
diff --git a/drivers/hid/hid-topseed.c b/drivers/hid/hid-topseed.c
index e9cdde840362..2125327b8de1 100644
--- a/drivers/hid/hid-topseed.c
+++ b/drivers/hid/hid-topseed.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for TopSeed Cyberlink remote
  *
@@ -12,10 +13,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-twinhan.c b/drivers/hid/hid-twinhan.c
index c08c36443f83..14af794146c0 100644
--- a/drivers/hid/hid-twinhan.c
+++ b/drivers/hid/hid-twinhan.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * HID driver for TwinHan IR remote control
  *
@@ -7,9 +8,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-u2fzero.c b/drivers/hid/hid-u2fzero.c
new file mode 100644
index 000000000000..95e0807878c7
--- /dev/null
+++ b/drivers/hid/hid-u2fzero.c
@@ -0,0 +1,374 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * U2F Zero LED and RNG driver
+ *
+ * Copyright 2018 Andrej Shadura <andrew@shadura.me>
+ * Loosely based on drivers/hid/hid-led.c
+ *              and drivers/usb/misc/chaoskey.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2.
+ */
+
+#include <linux/hid.h>
+#include <linux/hidraw.h>
+#include <linux/hw_random.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/usb.h>
+
+#include "usbhid/usbhid.h"
+#include "hid-ids.h"
+
+#define DRIVER_SHORT		"u2fzero"
+
+#define HID_REPORT_SIZE		64
+
+/* We only use broadcast (CID-less) messages */
+#define CID_BROADCAST		0xffffffff
+
+struct u2f_hid_msg {
+	u32 cid;
+	union {
+		struct {
+			u8 cmd;
+			u8 bcnth;
+			u8 bcntl;
+			u8 data[HID_REPORT_SIZE - 7];
+		} init;
+		struct {
+			u8 seq;
+			u8 data[HID_REPORT_SIZE - 5];
+		} cont;
+	};
+} __packed;
+
+struct u2f_hid_report {
+	u8 report_type;
+	struct u2f_hid_msg msg;
+} __packed;
+
+#define U2F_HID_MSG_LEN(f)	(size_t)(((f).init.bcnth << 8) + (f).init.bcntl)
+
+/* Custom extensions to the U2FHID protocol */
+#define U2F_CUSTOM_GET_RNG	0x21
+#define U2F_CUSTOM_WINK		0x24
+
+struct u2fzero_device {
+	struct hid_device	*hdev;
+	struct urb		*urb;	    /* URB for the RNG data */
+	struct led_classdev	ldev;	    /* Embedded struct for led */
+	struct hwrng		hwrng;	    /* Embedded struct for hwrng */
+	char			*led_name;
+	char			*rng_name;
+	u8			*buf_out;
+	u8			*buf_in;
+	struct mutex		lock;
+	bool			present;
+};
+
+static int u2fzero_send(struct u2fzero_device *dev, struct u2f_hid_report *req)
+{
+	int ret;
+
+	mutex_lock(&dev->lock);
+
+	memcpy(dev->buf_out, req, sizeof(struct u2f_hid_report));
+
+	ret = hid_hw_output_report(dev->hdev, dev->buf_out,
+				   sizeof(struct u2f_hid_msg));
+
+	mutex_unlock(&dev->lock);
+
+	if (ret < 0)
+		return ret;
+
+	return ret == sizeof(struct u2f_hid_msg) ? 0 : -EMSGSIZE;
+}
+
+struct u2fzero_transfer_context {
+	struct completion done;
+	int status;
+};
+
+static void u2fzero_read_callback(struct urb *urb)
+{
+	struct u2fzero_transfer_context *ctx = urb->context;
+
+	ctx->status = urb->status;
+	complete(&ctx->done);
+}
+
+static int u2fzero_recv(struct u2fzero_device *dev,
+			struct u2f_hid_report *req,
+			struct u2f_hid_msg *resp)
+{
+	int ret;
+	struct hid_device *hdev = dev->hdev;
+	struct u2fzero_transfer_context ctx;
+
+	mutex_lock(&dev->lock);
+
+	memcpy(dev->buf_out, req, sizeof(struct u2f_hid_report));
+
+	dev->urb->context = &ctx;
+	init_completion(&ctx.done);
+
+	ret = usb_submit_urb(dev->urb, GFP_NOIO);
+	if (unlikely(ret)) {
+		hid_err(hdev, "usb_submit_urb failed: %d", ret);
+		goto err;
+	}
+
+	ret = hid_hw_output_report(dev->hdev, dev->buf_out,
+				   sizeof(struct u2f_hid_msg));
+
+	if (ret < 0) {
+		hid_err(hdev, "hid_hw_output_report failed: %d", ret);
+		goto err;
+	}
+
+	ret = (wait_for_completion_timeout(
+		&ctx.done, msecs_to_jiffies(USB_CTRL_SET_TIMEOUT)));
+	if (ret < 0) {
+		usb_kill_urb(dev->urb);
+		hid_err(hdev, "urb submission timed out");
+	} else {
+		ret = dev->urb->actual_length;
+		memcpy(resp, dev->buf_in, ret);
+	}
+
+err:
+	mutex_unlock(&dev->lock);
+
+	return ret;
+}
+
+static int u2fzero_blink(struct led_classdev *ldev)
+{
+	struct u2fzero_device *dev = container_of(ldev,
+		struct u2fzero_device, ldev);
+	struct u2f_hid_report req = {
+		.report_type = 0,
+		.msg.cid = CID_BROADCAST,
+		.msg.init = {
+			.cmd = U2F_CUSTOM_WINK,
+			.bcnth = 0,
+			.bcntl = 0,
+			.data  = {0},
+		}
+	};
+	return u2fzero_send(dev, &req);
+}
+
+static int u2fzero_brightness_set(struct led_classdev *ldev,
+				  enum led_brightness brightness)
+{
+	ldev->brightness = LED_OFF;
+	if (brightness)
+		return u2fzero_blink(ldev);
+	else
+		return 0;
+}
+
+static int u2fzero_rng_read(struct hwrng *rng, void *data,
+			    size_t max, bool wait)
+{
+	struct u2fzero_device *dev = container_of(rng,
+		struct u2fzero_device, hwrng);
+	struct u2f_hid_report req = {
+		.report_type = 0,
+		.msg.cid = CID_BROADCAST,
+		.msg.init = {
+			.cmd = U2F_CUSTOM_GET_RNG,
+			.bcnth = 0,
+			.bcntl = 0,
+			.data  = {0},
+		}
+	};
+	struct u2f_hid_msg resp;
+	int ret;
+	size_t actual_length;
+
+	if (!dev->present) {
+		hid_dbg(dev->hdev, "device not present");
+		return 0;
+	}
+
+	ret = u2fzero_recv(dev, &req, &resp);
+	if (ret < 0)
+		return 0;
+
+	/* only take the minimum amount of data it is safe to take */
+	actual_length = min3((size_t)ret - offsetof(struct u2f_hid_msg,
+		init.data), U2F_HID_MSG_LEN(resp), max);
+
+	memcpy(data, resp.init.data, actual_length);
+
+	return actual_length;
+}
+
+static int u2fzero_init_led(struct u2fzero_device *dev,
+			    unsigned int minor)
+{
+	dev->led_name = devm_kasprintf(&dev->hdev->dev, GFP_KERNEL,
+		"%s%u", DRIVER_SHORT, minor);
+	if (dev->led_name == NULL)
+		return -ENOMEM;
+
+	dev->ldev.name = dev->led_name;
+	dev->ldev.max_brightness = LED_ON;
+	dev->ldev.flags = LED_HW_PLUGGABLE;
+	dev->ldev.brightness_set_blocking = u2fzero_brightness_set;
+
+	return devm_led_classdev_register(&dev->hdev->dev, &dev->ldev);
+}
+
+static int u2fzero_init_hwrng(struct u2fzero_device *dev,
+			      unsigned int minor)
+{
+	dev->rng_name = devm_kasprintf(&dev->hdev->dev, GFP_KERNEL,
+		"%s-rng%u", DRIVER_SHORT, minor);
+	if (dev->rng_name == NULL)
+		return -ENOMEM;
+
+	dev->hwrng.name = dev->rng_name;
+	dev->hwrng.read = u2fzero_rng_read;
+	dev->hwrng.quality = 1;
+
+	return devm_hwrng_register(&dev->hdev->dev, &dev->hwrng);
+}
+
+static int u2fzero_fill_in_urb(struct u2fzero_device *dev)
+{
+	struct hid_device *hdev = dev->hdev;
+	struct usb_device *udev;
+	struct usbhid_device *usbhid = hdev->driver_data;
+	unsigned int pipe_in;
+	struct usb_host_endpoint *ep;
+
+	if (dev->hdev->bus != BUS_USB)
+		return -EINVAL;
+
+	udev = hid_to_usb_dev(hdev);
+
+	if (!usbhid->urbout || !usbhid->urbin)
+		return -ENODEV;
+
+	ep = usb_pipe_endpoint(udev, usbhid->urbin->pipe);
+	if (!ep)
+		return -ENODEV;
+
+	dev->urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!dev->urb)
+		return -ENOMEM;
+
+	pipe_in = (usbhid->urbin->pipe & ~(3 << 30)) | (PIPE_INTERRUPT << 30);
+
+	usb_fill_int_urb(dev->urb,
+		udev,
+		pipe_in,
+		dev->buf_in,
+		HID_REPORT_SIZE,
+		u2fzero_read_callback,
+		NULL,
+		ep->desc.bInterval);
+
+	return 0;
+}
+
+static int u2fzero_probe(struct hid_device *hdev,
+			 const struct hid_device_id *id)
+{
+	struct u2fzero_device *dev;
+	unsigned int minor;
+	int ret;
+
+	if (!hid_is_using_ll_driver(hdev, &usb_hid_driver))
+		return -EINVAL;
+
+	dev = devm_kzalloc(&hdev->dev, sizeof(*dev), GFP_KERNEL);
+	if (dev == NULL)
+		return -ENOMEM;
+
+	dev->buf_out = devm_kmalloc(&hdev->dev,
+		sizeof(struct u2f_hid_report), GFP_KERNEL);
+	if (dev->buf_out == NULL)
+		return -ENOMEM;
+
+	dev->buf_in = devm_kmalloc(&hdev->dev,
+		sizeof(struct u2f_hid_msg), GFP_KERNEL);
+	if (dev->buf_in == NULL)
+		return -ENOMEM;
+
+	ret = hid_parse(hdev);
+	if (ret)
+		return ret;
+
+	dev->hdev = hdev;
+	hid_set_drvdata(hdev, dev);
+	mutex_init(&dev->lock);
+
+	ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
+	if (ret)
+		return ret;
+
+	u2fzero_fill_in_urb(dev);
+
+	dev->present = true;
+
+	minor = ((struct hidraw *) hdev->hidraw)->minor;
+
+	ret = u2fzero_init_led(dev, minor);
+	if (ret) {
+		hid_hw_stop(hdev);
+		return ret;
+	}
+
+	hid_info(hdev, "U2F Zero LED initialised\n");
+
+	ret = u2fzero_init_hwrng(dev, minor);
+	if (ret) {
+		hid_hw_stop(hdev);
+		return ret;
+	}
+
+	hid_info(hdev, "U2F Zero RNG initialised\n");
+
+	return 0;
+}
+
+static void u2fzero_remove(struct hid_device *hdev)
+{
+	struct u2fzero_device *dev = hid_get_drvdata(hdev);
+
+	mutex_lock(&dev->lock);
+	dev->present = false;
+	mutex_unlock(&dev->lock);
+
+	hid_hw_stop(hdev);
+	usb_poison_urb(dev->urb);
+	usb_free_urb(dev->urb);
+}
+
+static const struct hid_device_id u2fzero_table[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
+	  USB_DEVICE_ID_U2F_ZERO) },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, u2fzero_table);
+
+static struct hid_driver u2fzero_driver = {
+	.name = "hid-" DRIVER_SHORT,
+	.probe = u2fzero_probe,
+	.remove = u2fzero_remove,
+	.id_table = u2fzero_table,
+};
+
+module_hid_driver(u2fzero_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Andrej Shadura <andrew@shadura.me>");
+MODULE_DESCRIPTION("U2F Zero LED and RNG driver");
diff --git a/drivers/hid/hid-uclogic-core.c b/drivers/hid/hid-uclogic-core.c
index 8fe02d81265d..914fb527ae7a 100644
--- a/drivers/hid/hid-uclogic-core.c
+++ b/drivers/hid/hid-uclogic-core.c
@@ -369,6 +369,8 @@ static const struct hid_device_id uclogic_devices[] = {
 				USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_HUION,
 				USB_DEVICE_ID_HUION_TABLET) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_HUION,
+				USB_DEVICE_ID_HUION_HS64) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
 				USB_DEVICE_ID_HUION_TABLET) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
diff --git a/drivers/hid/hid-uclogic-params.c b/drivers/hid/hid-uclogic-params.c
index 0187c9f8fc22..273d784fff66 100644
--- a/drivers/hid/hid-uclogic-params.c
+++ b/drivers/hid/hid-uclogic-params.c
@@ -977,6 +977,8 @@ int uclogic_params_init(struct uclogic_params *params,
 		/* FALL THROUGH */
 	case VID_PID(USB_VENDOR_ID_HUION,
 		     USB_DEVICE_ID_HUION_TABLET):
+	case VID_PID(USB_VENDOR_ID_HUION,
+		     USB_DEVICE_ID_HUION_HS64):
 	case VID_PID(USB_VENDOR_ID_UCLOGIC,
 		     USB_DEVICE_ID_HUION_TABLET):
 	case VID_PID(USB_VENDOR_ID_UCLOGIC,
diff --git a/drivers/hid/hid-udraw-ps3.c b/drivers/hid/hid-udraw-ps3.c
index 88ea390c10ad..b0fbd11aa0fc 100644
--- a/drivers/hid/hid-udraw-ps3.c
+++ b/drivers/hid/hid-udraw-ps3.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * HID driver for THQ PS3 uDraw tablet
  *
  * Copyright (C) 2016 Red Hat Inc. All Rights Reserved
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-waltop.c b/drivers/hid/hid-waltop.c
index a91aabe4a70a..bc355b1a5b30 100644
--- a/drivers/hid/hid-waltop.c
+++ b/drivers/hid/hid-waltop.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Waltop devices not fully compliant with HID standard
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-wiimote-core.c b/drivers/hid/hid-wiimote-core.c
index 7780da4fe897..92874dbe4d4a 100644
--- a/drivers/hid/hid-wiimote-core.c
+++ b/drivers/hid/hid-wiimote-core.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * HID driver for Nintendo Wii / Wii U peripherals
  * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/completion.h>
diff --git a/drivers/hid/hid-wiimote-debug.c b/drivers/hid/hid-wiimote-debug.c
index c13fb5bd79e8..a99dcca2e099 100644
--- a/drivers/hid/hid-wiimote-debug.c
+++ b/drivers/hid/hid-wiimote-debug.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Debug support for HID Nintendo Wii / Wii U peripherals
  * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/debugfs.h>
diff --git a/drivers/hid/hid-wiimote-modules.c b/drivers/hid/hid-wiimote-modules.c
index aa72eb9a8e2f..2c3925357857 100644
--- a/drivers/hid/hid-wiimote-modules.c
+++ b/drivers/hid/hid-wiimote-modules.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Device Modules for Nintendo Wii / Wii U HID Driver
  * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 /*
diff --git a/drivers/hid/hid-wiimote.h b/drivers/hid/hid-wiimote.h
index 3bf3d3cc1c38..b2a26a0a8f12 100644
--- a/drivers/hid/hid-wiimote.h
+++ b/drivers/hid/hid-wiimote.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __HID_WIIMOTE_H
 #define __HID_WIIMOTE_H
 
@@ -7,10 +8,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/completion.h>
diff --git a/drivers/hid/hid-xinmo.c b/drivers/hid/hid-xinmo.c
index 9ad7731d2e10..5c2860a9d8c9 100644
--- a/drivers/hid/hid-xinmo.c
+++ b/drivers/hid/hid-xinmo.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  HID driver for Xin-Mo devices, currently only the Dual Arcade controller.
  *  Fixes the negative axis event values (the devices sends -2) to match the
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hid-zpff.c b/drivers/hid/hid-zpff.c
index a29756c6ca02..f90959e94028 100644
--- a/drivers/hid/hid-zpff.c
+++ b/drivers/hid/hid-zpff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Force feedback support for Zeroplus based devices
  *
@@ -5,19 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 
diff --git a/drivers/hid/hid-zydacron.c b/drivers/hid/hid-zydacron.c
index 1a660bd97ab2..0d003caee113 100644
--- a/drivers/hid/hid-zydacron.c
+++ b/drivers/hid/hid-zydacron.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
 *  HID driver for zydacron remote control
 *
@@ -5,10 +6,6 @@
 */
 
 /*
-* This program is free software; you can redistribute it and/or modify it
-* under the terms of the GNU General Public License as published by the Free
-* Software Foundation; either version 2 of the License, or (at your option)
-* any later version.
 */
 
 #include <linux/device.h>
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index 9fc51eff1079..006bd6f4f653 100644
--- a/drivers/hid/hidraw.c
+++ b/drivers/hid/hidraw.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * HID raw devices, giving access to raw HID events.
  *
@@ -9,15 +10,6 @@
  *  Copyright (c) 2007-2014 Jiri Kosina
  */
 
-/*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
diff --git a/drivers/hid/i2c-hid/Kconfig b/drivers/hid/i2c-hid/Kconfig
index b66617a020bd..0e2ae47f38a7 100644
--- a/drivers/hid/i2c-hid/Kconfig
+++ b/drivers/hid/i2c-hid/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 menu "I2C HID support"
 	depends on I2C
 
diff --git a/drivers/hid/i2c-hid/Makefile b/drivers/hid/i2c-hid/Makefile
index 099e1ce2f234..681b3896898e 100644
--- a/drivers/hid/i2c-hid/Makefile
+++ b/drivers/hid/i2c-hid/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the I2C input drivers
 #
diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index 4d1f24ee249c..90164fed08d3 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -184,8 +184,6 @@ static const struct i2c_hid_quirks {
 		I2C_HID_QUIRK_NO_RUNTIME_PM },
 	{ USB_VENDOR_ID_ELAN, HID_ANY_ID,
 		 I2C_HID_QUIRK_BOGUS_IRQ },
-	{ USB_VENDOR_ID_SYNAPTICS, I2C_DEVICE_ID_SYNAPTICS_7E7E,
-		I2C_HID_QUIRK_NO_RUNTIME_PM },
 	{ 0, 0 }
 };
 
diff --git a/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c b/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c
index fd1b6eea6d2f..75078c83be1a 100644
--- a/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c
+++ b/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c
@@ -354,6 +354,14 @@ static const struct dmi_system_id i2c_hid_dmi_desc_override_table[] = {
 		},
 		.driver_data = (void *)&sipodev_desc
 	},
+	{
+		.ident = "iBall Aer3",
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "iBall"),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Aer3"),
+		},
+		.driver_data = (void *)&sipodev_desc
+	},
 	{ }	/* Terminate list */
 };
 
diff --git a/drivers/hid/intel-ish-hid/Kconfig b/drivers/hid/intel-ish-hid/Kconfig
index 519e4c8b53c4..c6c9cfe2475e 100644
--- a/drivers/hid/intel-ish-hid/Kconfig
+++ b/drivers/hid/intel-ish-hid/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 menu "Intel ISH HID support"
 	depends on (X86_64 || COMPILE_TEST) && PCI
 
@@ -14,4 +15,19 @@ config INTEL_ISH_HID
 	  Broxton and Kaby Lake.
 
 	  Say Y here if you want to support Intel ISH. If unsure, say N.
+
+config INTEL_ISH_FIRMWARE_DOWNLOADER
+	tristate "Host Firmware Load feature for Intel ISH"
+	depends on INTEL_ISH_HID
+	depends on X86
+	help
+	  The Integrated Sensor Hub (ISH) enables the kernel to offload
+	  sensor polling and algorithm processing to a dedicated low power
+	  processor in the chipset.
+
+	  The Host Firmware Load feature adds support to load the ISH
+	  firmware from host file system at boot.
+
+	  Say M here if you want to support Host Firmware Loading feature
+	  for Intel ISH. If unsure, say N.
 endmenu
diff --git a/drivers/hid/intel-ish-hid/Makefile b/drivers/hid/intel-ish-hid/Makefile
index 825b70af672f..f0a82b1c7cb9 100644
--- a/drivers/hid/intel-ish-hid/Makefile
+++ b/drivers/hid/intel-ish-hid/Makefile
@@ -20,4 +20,7 @@ obj-$(CONFIG_INTEL_ISH_HID) += intel-ishtp-hid.o
 intel-ishtp-hid-objs := ishtp-hid.o
 intel-ishtp-hid-objs += ishtp-hid-client.o
 
-ccflags-y += -Idrivers/hid/intel-ish-hid/ishtp
+obj-$(CONFIG_INTEL_ISH_FIRMWARE_DOWNLOADER) += intel-ishtp-loader.o
+intel-ishtp-loader-objs += ishtp-fw-loader.o
+
+ccflags-y += -I $(srctree)/$(src)/ishtp
diff --git a/drivers/hid/intel-ish-hid/ipc/hw-ish-regs.h b/drivers/hid/intel-ish-hid/ipc/hw-ish-regs.h
index a5897b9c0956..4db01bbeffe0 100644
--- a/drivers/hid/intel-ish-hid/ipc/hw-ish-regs.h
+++ b/drivers/hid/intel-ish-hid/ipc/hw-ish-regs.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * ISH registers definitions
  *
  * Copyright (c) 2012-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 
 #ifndef _ISHTP_ISH_REGS_H_
diff --git a/drivers/hid/intel-ish-hid/ipc/hw-ish.h b/drivers/hid/intel-ish-hid/ipc/hw-ish.h
index 08a8327dfd22..1065692f90e2 100644
--- a/drivers/hid/intel-ish-hid/ipc/hw-ish.h
+++ b/drivers/hid/intel-ish-hid/ipc/hw-ish.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * H/W layer of ISHTP provider device (ISH)
  *
  * Copyright (c) 2014-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 
 #ifndef _ISHTP_HW_ISH_H_
@@ -31,6 +23,7 @@
 #define CNL_H_DEVICE_ID		0xA37C
 #define ICL_MOBILE_DEVICE_ID	0x34FC
 #define SPT_H_DEVICE_ID		0xA135
+#define CML_LP_DEVICE_ID	0x02FC
 
 #define	REVISION_ID_CHT_A0	0x6
 #define	REVISION_ID_CHT_Ax_SI	0x0
diff --git a/drivers/hid/intel-ish-hid/ipc/ipc.c b/drivers/hid/intel-ish-hid/ipc/ipc.c
index 96e869118db3..18fe8af89aad 100644
--- a/drivers/hid/intel-ish-hid/ipc/ipc.c
+++ b/drivers/hid/intel-ish-hid/ipc/ipc.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * H/W layer of ISHTP provider device (ISH)
  *
  * Copyright (c) 2014-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 
 #include <linux/sched.h>
diff --git a/drivers/hid/intel-ish-hid/ipc/pci-ish.c b/drivers/hid/intel-ish-hid/ipc/pci-ish.c
index a6e1ee744f4d..17ae49fba920 100644
--- a/drivers/hid/intel-ish-hid/ipc/pci-ish.c
+++ b/drivers/hid/intel-ish-hid/ipc/pci-ish.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * PCI glue for ISHTP provider device (ISH) driver
  *
  * Copyright (c) 2014-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 
 #include <linux/module.h>
@@ -40,6 +32,7 @@ static const struct pci_device_id ish_pci_tbl[] = {
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, CNL_H_DEVICE_ID)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, ICL_MOBILE_DEVICE_ID)},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, SPT_H_DEVICE_ID)},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, CML_LP_DEVICE_ID)},
 	{0, }
 };
 MODULE_DEVICE_TABLE(pci, ish_pci_tbl);
diff --git a/drivers/hid/intel-ish-hid/ishtp-fw-loader.c b/drivers/hid/intel-ish-hid/ishtp-fw-loader.c
new file mode 100644
index 000000000000..aa2dbed30fc3
--- /dev/null
+++ b/drivers/hid/intel-ish-hid/ishtp-fw-loader.c
@@ -0,0 +1,1085 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ISH-TP client driver for ISH firmware loading
+ *
+ * Copyright (c) 2019, Intel Corporation.
+ */
+
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/intel-ish-client-if.h>
+#include <linux/property.h>
+#include <asm/cacheflush.h>
+
+/* Number of times we attempt to load the firmware before giving up */
+#define MAX_LOAD_ATTEMPTS			3
+
+/* ISH TX/RX ring buffer pool size */
+#define LOADER_CL_RX_RING_SIZE			1
+#define LOADER_CL_TX_RING_SIZE			1
+
+/*
+ * ISH Shim firmware loader reserves 4 Kb buffer in SRAM. The buffer is
+ * used to temporarily hold the data transferred from host to Shim
+ * firmware loader. Reason for the odd size of 3968 bytes? Each IPC
+ * transfer is 128 bytes (= 4 bytes header + 124 bytes payload). So the
+ * 4 Kb buffer can hold maximum of 32 IPC transfers, which means we can
+ * have a max payload of 3968 bytes (= 32 x 124 payload).
+ */
+#define LOADER_SHIM_IPC_BUF_SIZE		3968
+
+/**
+ * enum ish_loader_commands -	ISH loader host commands.
+ * LOADER_CMD_XFER_QUERY	Query the Shim firmware loader for
+ *				capabilities
+ * LOADER_CMD_XFER_FRAGMENT	Transfer one firmware image fragment at a
+ *				time. The command may be executed
+ *				multiple times until the entire firmware
+ *				image is downloaded to SRAM.
+ * LOADER_CMD_START		Start executing the main firmware.
+ */
+enum ish_loader_commands {
+	LOADER_CMD_XFER_QUERY = 0,
+	LOADER_CMD_XFER_FRAGMENT,
+	LOADER_CMD_START,
+};
+
+/* Command bit mask */
+#define	CMD_MASK				GENMASK(6, 0)
+#define	IS_RESPONSE				BIT(7)
+
+/*
+ * ISH firmware max delay for one transmit failure is 1 Hz,
+ * and firmware will retry 2 times, so 3 Hz is used for timeout.
+ */
+#define ISHTP_SEND_TIMEOUT			(3 * HZ)
+
+/*
+ * Loader transfer modes:
+ *
+ * LOADER_XFER_MODE_ISHTP mode uses the existing ISH-TP mechanism to
+ * transfer data. This may use IPC or DMA if supported in firmware.
+ * The buffer size is limited to 4 Kb by the IPC/ISH-TP protocol for
+ * both IPC & DMA (legacy).
+ *
+ * LOADER_XFER_MODE_DIRECT_DMA - firmware loading is a bit different
+ * from the sensor data streaming. Here we download a large (300+ Kb)
+ * image directly to ISH SRAM memory. There is limited benefit of
+ * DMA'ing 300 Kb image in 4 Kb chucks limit. Hence, we introduce
+ * this "direct dma" mode, where we do not use ISH-TP for DMA, but
+ * instead manage the DMA directly in kernel driver and Shim firmware
+ * loader (allocate buffer, break in chucks and transfer). This allows
+ * to overcome 4 Kb limit, and optimize the data flow path in firmware.
+ */
+#define LOADER_XFER_MODE_DIRECT_DMA		BIT(0)
+#define LOADER_XFER_MODE_ISHTP			BIT(1)
+
+/* ISH Transport Loader client unique GUID */
+static const guid_t loader_ishtp_guid =
+	GUID_INIT(0xc804d06a, 0x55bd, 0x4ea7,
+		  0xad, 0xed, 0x1e, 0x31, 0x22, 0x8c, 0x76, 0xdc);
+
+#define FILENAME_SIZE				256
+
+/*
+ * The firmware loading latency will be minimum if we can DMA the
+ * entire ISH firmware image in one go. This requires that we allocate
+ * a large DMA buffer in kernel, which could be problematic on some
+ * platforms. So here we limit the DMA buffer size via a module_param.
+ * We default to 4 pages, but a customer can set it to higher limit if
+ * deemed appropriate for his platform.
+ */
+static int dma_buf_size_limit = 4 * PAGE_SIZE;
+
+/**
+ * struct loader_msg_hdr - Header for ISH Loader commands.
+ * @command:		LOADER_CMD* commands. Bit 7 is the response.
+ * @status:		Command response status. Non 0, is error
+ *			condition.
+ *
+ * This structure is used as header for every command/data sent/received
+ * between Host driver and ISH Shim firmware loader.
+ */
+struct loader_msg_hdr {
+	u8 command;
+	u8 reserved[2];
+	u8 status;
+} __packed;
+
+struct loader_xfer_query {
+	struct loader_msg_hdr hdr;
+	u32 image_size;
+} __packed;
+
+struct ish_fw_version {
+	u16 major;
+	u16 minor;
+	u16 hotfix;
+	u16 build;
+} __packed;
+
+union loader_version {
+	u32 value;
+	struct {
+		u8 major;
+		u8 minor;
+		u8 hotfix;
+		u8 build;
+	};
+} __packed;
+
+struct loader_capability {
+	u32 max_fw_image_size;
+	u32 xfer_mode;
+	u32 max_dma_buf_size; /* only for dma mode, multiples of cacheline */
+} __packed;
+
+struct shim_fw_info {
+	struct ish_fw_version ish_fw_version;
+	u32 protocol_version;
+	union loader_version ldr_version;
+	struct loader_capability ldr_capability;
+} __packed;
+
+struct loader_xfer_query_response {
+	struct loader_msg_hdr hdr;
+	struct shim_fw_info fw_info;
+} __packed;
+
+struct loader_xfer_fragment {
+	struct loader_msg_hdr hdr;
+	u32 xfer_mode;
+	u32 offset;
+	u32 size;
+	u32 is_last;
+} __packed;
+
+struct loader_xfer_ipc_fragment {
+	struct loader_xfer_fragment fragment;
+	u8 data[] ____cacheline_aligned; /* variable length payload here */
+} __packed;
+
+struct loader_xfer_dma_fragment {
+	struct loader_xfer_fragment fragment;
+	u64 ddr_phys_addr;
+} __packed;
+
+struct loader_start {
+	struct loader_msg_hdr hdr;
+} __packed;
+
+/**
+ * struct response_info - Encapsulate firmware response related
+ *			information for passing between function
+ *			loader_cl_send() and process_recv() callback.
+ * @data		Copy the data received from firmware here.
+ * @max_size		Max size allocated for the @data buffer. If the
+ *			received data exceeds this value, we log an
+ *			error.
+ * @size		Actual size of data received from firmware.
+ * @error		Returns 0 for success, negative error code for a
+ *			failure in function process_recv().
+ * @received		Set to true on receiving a valid firmware
+ *			response to host command
+ * @wait_queue		Wait queue for Host firmware loading where the
+ *			client sends message to ISH firmware and waits
+ *			for response
+ */
+struct response_info {
+	void *data;
+	size_t max_size;
+	size_t size;
+	int error;
+	bool received;
+	wait_queue_head_t wait_queue;
+};
+
+/**
+ * struct ishtp_cl_data - Encapsulate per ISH-TP Client Data.
+ * @work_ishtp_reset:	Work queue for reset handling.
+ * @work_fw_load:	Work queue for host firmware loading.
+ * @flag_retry		Flag for indicating host firmware loading should
+ *			be retried.
+ * @retry_count		Count the number of retries.
+ *
+ * This structure is used to store data per client.
+ */
+struct ishtp_cl_data {
+	struct ishtp_cl *loader_ishtp_cl;
+	struct ishtp_cl_device *cl_device;
+
+	/*
+	 * Used for passing firmware response information between
+	 * loader_cl_send() and process_recv() callback.
+	 */
+	struct response_info response;
+
+	struct work_struct work_ishtp_reset;
+	struct work_struct work_fw_load;
+
+	/*
+	 * In certain failure scenrios, it makes sense to reset the ISH
+	 * subsystem and retry Host firmware loading (e.g. bad message
+	 * packet, ENOMEM, etc.). On the other hand, failures due to
+	 * protocol mismatch, etc., are not recoverable. We do not
+	 * retry them.
+	 *
+	 * If set, the flag indicates that we should re-try the
+	 * particular failure.
+	 */
+	bool flag_retry;
+	int retry_count;
+};
+
+#define IPC_FRAGMENT_DATA_PREAMBLE				\
+	offsetof(struct loader_xfer_ipc_fragment, data)
+
+#define cl_data_to_dev(client_data) ishtp_device((client_data)->cl_device)
+
+/**
+ * get_firmware_variant() - Gets the filename of firmware image to be
+ *			loaded based on platform variant.
+ * @client_data		Client data instance.
+ * @filename		Returns firmware filename.
+ *
+ * Queries the firmware-name device property string.
+ *
+ * Return: 0 for success, negative error code for failure.
+ */
+static int get_firmware_variant(struct ishtp_cl_data *client_data,
+				char *filename)
+{
+	int rv;
+	const char *val;
+	struct device *devc = ishtp_get_pci_device(client_data->cl_device);
+
+	rv = device_property_read_string(devc, "firmware-name", &val);
+	if (rv < 0) {
+		dev_err(devc,
+			"Error: ISH firmware-name device property required\n");
+		return rv;
+	}
+	return snprintf(filename, FILENAME_SIZE, "intel/%s", val);
+}
+
+/**
+ * loader_cl_send()	Send message from host to firmware
+ * @client_data:	Client data instance
+ * @out_msg		Message buffer to be sent to firmware
+ * @out_size		Size of out going message
+ * @in_msg		Message buffer where the incoming data copied.
+ *			This buffer is allocated by calling
+ * @in_size		Max size of incoming message
+ *
+ * Return: Number of bytes copied in the in_msg on success, negative
+ * error code on failure.
+ */
+static int loader_cl_send(struct ishtp_cl_data *client_data,
+			  u8 *out_msg, size_t out_size,
+			  u8 *in_msg, size_t in_size)
+{
+	int rv;
+	struct loader_msg_hdr *out_hdr = (struct loader_msg_hdr *)out_msg;
+	struct ishtp_cl *loader_ishtp_cl = client_data->loader_ishtp_cl;
+
+	dev_dbg(cl_data_to_dev(client_data),
+		"%s: command=%02lx is_response=%u status=%02x\n",
+		__func__,
+		out_hdr->command & CMD_MASK,
+		out_hdr->command & IS_RESPONSE ? 1 : 0,
+		out_hdr->status);
+
+	/* Setup in coming buffer & size */
+	client_data->response.data = in_msg;
+	client_data->response.max_size = in_size;
+	client_data->response.error = 0;
+	client_data->response.received = false;
+
+	rv = ishtp_cl_send(loader_ishtp_cl, out_msg, out_size);
+	if (rv < 0) {
+		dev_err(cl_data_to_dev(client_data),
+			"ishtp_cl_send error %d\n", rv);
+		return rv;
+	}
+
+	wait_event_interruptible_timeout(client_data->response.wait_queue,
+					 client_data->response.received,
+					 ISHTP_SEND_TIMEOUT);
+	if (!client_data->response.received) {
+		dev_err(cl_data_to_dev(client_data),
+			"Timed out for response to command=%02lx",
+			out_hdr->command & CMD_MASK);
+		return -ETIMEDOUT;
+	}
+
+	if (client_data->response.error < 0)
+		return client_data->response.error;
+
+	return client_data->response.size;
+}
+
+/**
+ * process_recv() -	Receive and parse incoming packet
+ * @loader_ishtp_cl:	Client instance to get stats
+ * @rb_in_proc:		ISH received message buffer
+ *
+ * Parse the incoming packet. If it is a response packet then it will
+ * update received and wake up the caller waiting to for the response.
+ */
+static void process_recv(struct ishtp_cl *loader_ishtp_cl,
+			 struct ishtp_cl_rb *rb_in_proc)
+{
+	struct loader_msg_hdr *hdr;
+	size_t data_len = rb_in_proc->buf_idx;
+	struct ishtp_cl_data *client_data =
+		ishtp_get_client_data(loader_ishtp_cl);
+
+	/* Sanity check */
+	if (!client_data->response.data) {
+		dev_err(cl_data_to_dev(client_data),
+			"Receiving buffer is null. Should be allocated by calling function\n");
+		client_data->response.error = -EINVAL;
+		goto end;
+	}
+
+	if (client_data->response.received) {
+		dev_err(cl_data_to_dev(client_data),
+			"Previous firmware message not yet processed\n");
+		client_data->response.error = -EINVAL;
+		goto end;
+	}
+	/*
+	 * All firmware messages have a header. Check buffer size
+	 * before accessing elements inside.
+	 */
+	if (!rb_in_proc->buffer.data) {
+		dev_warn(cl_data_to_dev(client_data),
+			 "rb_in_proc->buffer.data returned null");
+		client_data->response.error = -EBADMSG;
+		goto end;
+	}
+
+	if (data_len < sizeof(struct loader_msg_hdr)) {
+		dev_err(cl_data_to_dev(client_data),
+			"data size %zu is less than header %zu\n",
+			data_len, sizeof(struct loader_msg_hdr));
+		client_data->response.error = -EMSGSIZE;
+		goto end;
+	}
+
+	hdr = (struct loader_msg_hdr *)rb_in_proc->buffer.data;
+
+	dev_dbg(cl_data_to_dev(client_data),
+		"%s: command=%02lx is_response=%u status=%02x\n",
+		__func__,
+		hdr->command & CMD_MASK,
+		hdr->command & IS_RESPONSE ? 1 : 0,
+		hdr->status);
+
+	if (((hdr->command & CMD_MASK) != LOADER_CMD_XFER_QUERY) &&
+	    ((hdr->command & CMD_MASK) != LOADER_CMD_XFER_FRAGMENT) &&
+	    ((hdr->command & CMD_MASK) != LOADER_CMD_START)) {
+		dev_err(cl_data_to_dev(client_data),
+			"Invalid command=%02lx\n",
+			hdr->command & CMD_MASK);
+		client_data->response.error = -EPROTO;
+		goto end;
+	}
+
+	if (data_len > client_data->response.max_size) {
+		dev_err(cl_data_to_dev(client_data),
+			"Received buffer size %zu is larger than allocated buffer %zu\n",
+			data_len, client_data->response.max_size);
+		client_data->response.error = -EMSGSIZE;
+		goto end;
+	}
+
+	/* We expect only "response" messages from firmware */
+	if (!(hdr->command & IS_RESPONSE)) {
+		dev_err(cl_data_to_dev(client_data),
+			"Invalid response to command\n");
+		client_data->response.error = -EIO;
+		goto end;
+	}
+
+	if (hdr->status) {
+		dev_err(cl_data_to_dev(client_data),
+			"Loader returned status %d\n",
+			hdr->status);
+		client_data->response.error = -EIO;
+		goto end;
+	}
+
+	/* Update the actual received buffer size */
+	client_data->response.size = data_len;
+
+	/*
+	 * Copy the buffer received in firmware response for the
+	 * calling thread.
+	 */
+	memcpy(client_data->response.data,
+	       rb_in_proc->buffer.data, data_len);
+
+	/* Set flag before waking up the caller */
+	client_data->response.received = true;
+
+end:
+	/* Free the buffer */
+	ishtp_cl_io_rb_recycle(rb_in_proc);
+	rb_in_proc = NULL;
+
+	/* Wake the calling thread */
+	wake_up_interruptible(&client_data->response.wait_queue);
+}
+
+/**
+ * loader_cl_event_cb() - bus driver callback for incoming message
+ * @device:		Pointer to the ishtp client device for which this
+ *			message is targeted
+ *
+ * Remove the packet from the list and process the message by calling
+ * process_recv
+ */
+static void loader_cl_event_cb(struct ishtp_cl_device *cl_device)
+{
+	struct ishtp_cl_rb *rb_in_proc;
+	struct ishtp_cl	*loader_ishtp_cl = ishtp_get_drvdata(cl_device);
+
+	while ((rb_in_proc = ishtp_cl_rx_get_rb(loader_ishtp_cl)) != NULL) {
+		/* Process the data packet from firmware */
+		process_recv(loader_ishtp_cl, rb_in_proc);
+	}
+}
+
+/**
+ * ish_query_loader_prop() -  Query ISH Shim firmware loader
+ * @client_data:	Client data instance
+ * @fw:			Poiner to firmware data struct in host memory
+ * @fw_info:		Loader firmware properties
+ *
+ * This function queries the ISH Shim firmware loader for capabilities.
+ *
+ * Return: 0 for success, negative error code for failure.
+ */
+static int ish_query_loader_prop(struct ishtp_cl_data *client_data,
+				 const struct firmware *fw,
+				 struct shim_fw_info *fw_info)
+{
+	int rv;
+	struct loader_xfer_query ldr_xfer_query;
+	struct loader_xfer_query_response ldr_xfer_query_resp;
+
+	memset(&ldr_xfer_query, 0, sizeof(ldr_xfer_query));
+	ldr_xfer_query.hdr.command = LOADER_CMD_XFER_QUERY;
+	ldr_xfer_query.image_size = fw->size;
+	rv = loader_cl_send(client_data,
+			    (u8 *)&ldr_xfer_query,
+			    sizeof(ldr_xfer_query),
+			    (u8 *)&ldr_xfer_query_resp,
+			    sizeof(ldr_xfer_query_resp));
+	if (rv < 0) {
+		client_data->flag_retry = true;
+		return rv;
+	}
+
+	/* On success, the return value is the received buffer size */
+	if (rv != sizeof(struct loader_xfer_query_response)) {
+		dev_err(cl_data_to_dev(client_data),
+			"data size %d is not equal to size of loader_xfer_query_response %zu\n",
+			rv, sizeof(struct loader_xfer_query_response));
+		client_data->flag_retry = true;
+		return -EMSGSIZE;
+	}
+
+	/* Save fw_info for use outside this function */
+	*fw_info = ldr_xfer_query_resp.fw_info;
+
+	/* Loader firmware properties */
+	dev_dbg(cl_data_to_dev(client_data),
+		"ish_fw_version: major=%d minor=%d hotfix=%d build=%d protocol_version=0x%x loader_version=%d\n",
+		fw_info->ish_fw_version.major,
+		fw_info->ish_fw_version.minor,
+		fw_info->ish_fw_version.hotfix,
+		fw_info->ish_fw_version.build,
+		fw_info->protocol_version,
+		fw_info->ldr_version.value);
+
+	dev_dbg(cl_data_to_dev(client_data),
+		"loader_capability: max_fw_image_size=0x%x xfer_mode=%d max_dma_buf_size=0x%x dma_buf_size_limit=0x%x\n",
+		fw_info->ldr_capability.max_fw_image_size,
+		fw_info->ldr_capability.xfer_mode,
+		fw_info->ldr_capability.max_dma_buf_size,
+		dma_buf_size_limit);
+
+	/* Sanity checks */
+	if (fw_info->ldr_capability.max_fw_image_size < fw->size) {
+		dev_err(cl_data_to_dev(client_data),
+			"ISH firmware size %zu is greater than Shim firmware loader max supported %d\n",
+			fw->size,
+			fw_info->ldr_capability.max_fw_image_size);
+		return -ENOSPC;
+	}
+
+	/* For DMA the buffer size should be multiple of cacheline size */
+	if ((fw_info->ldr_capability.xfer_mode & LOADER_XFER_MODE_DIRECT_DMA) &&
+	    (fw_info->ldr_capability.max_dma_buf_size % L1_CACHE_BYTES)) {
+		dev_err(cl_data_to_dev(client_data),
+			"Shim firmware loader buffer size %d should be multiple of cacheline\n",
+			fw_info->ldr_capability.max_dma_buf_size);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/**
+ * ish_fw_xfer_ishtp()	Loads ISH firmware using ishtp interface
+ * @client_data:	Client data instance
+ * @fw:			Pointer to firmware data struct in host memory
+ *
+ * This function uses ISH-TP to transfer ISH firmware from host to
+ * ISH SRAM. Lower layers may use IPC or DMA depending on firmware
+ * support.
+ *
+ * Return: 0 for success, negative error code for failure.
+ */
+static int ish_fw_xfer_ishtp(struct ishtp_cl_data *client_data,
+			     const struct firmware *fw)
+{
+	int rv;
+	u32 fragment_offset, fragment_size, payload_max_size;
+	struct loader_xfer_ipc_fragment *ldr_xfer_ipc_frag;
+	struct loader_msg_hdr ldr_xfer_ipc_ack;
+
+	payload_max_size =
+		LOADER_SHIM_IPC_BUF_SIZE - IPC_FRAGMENT_DATA_PREAMBLE;
+
+	ldr_xfer_ipc_frag = kzalloc(LOADER_SHIM_IPC_BUF_SIZE, GFP_KERNEL);
+	if (!ldr_xfer_ipc_frag) {
+		client_data->flag_retry = true;
+		return -ENOMEM;
+	}
+
+	ldr_xfer_ipc_frag->fragment.hdr.command = LOADER_CMD_XFER_FRAGMENT;
+	ldr_xfer_ipc_frag->fragment.xfer_mode = LOADER_XFER_MODE_ISHTP;
+
+	/* Break the firmware image into fragments and send as ISH-TP payload */
+	fragment_offset = 0;
+	while (fragment_offset < fw->size) {
+		if (fragment_offset + payload_max_size < fw->size) {
+			fragment_size = payload_max_size;
+			ldr_xfer_ipc_frag->fragment.is_last = 0;
+		} else {
+			fragment_size = fw->size - fragment_offset;
+			ldr_xfer_ipc_frag->fragment.is_last = 1;
+		}
+
+		ldr_xfer_ipc_frag->fragment.offset = fragment_offset;
+		ldr_xfer_ipc_frag->fragment.size = fragment_size;
+		memcpy(ldr_xfer_ipc_frag->data,
+		       &fw->data[fragment_offset],
+		       fragment_size);
+
+		dev_dbg(cl_data_to_dev(client_data),
+			"xfer_mode=ipc offset=0x%08x size=0x%08x is_last=%d\n",
+			ldr_xfer_ipc_frag->fragment.offset,
+			ldr_xfer_ipc_frag->fragment.size,
+			ldr_xfer_ipc_frag->fragment.is_last);
+
+		rv = loader_cl_send(client_data,
+				    (u8 *)ldr_xfer_ipc_frag,
+				    IPC_FRAGMENT_DATA_PREAMBLE + fragment_size,
+				    (u8 *)&ldr_xfer_ipc_ack,
+				    sizeof(ldr_xfer_ipc_ack));
+		if (rv < 0) {
+			client_data->flag_retry = true;
+			goto end_err_resp_buf_release;
+		}
+
+		fragment_offset += fragment_size;
+	}
+
+	kfree(ldr_xfer_ipc_frag);
+	return 0;
+
+end_err_resp_buf_release:
+	/* Free ISH buffer if not done already, in error case */
+	kfree(ldr_xfer_ipc_frag);
+	return rv;
+}
+
+/**
+ * ish_fw_xfer_direct_dma() - Loads ISH firmware using direct dma
+ * @client_data:	Client data instance
+ * @fw:			Pointer to firmware data struct in host memory
+ * @fw_info:		Loader firmware properties
+ *
+ * Host firmware load is a unique case where we need to download
+ * a large firmware image (200+ Kb). This function implements
+ * direct DMA transfer in kernel and ISH firmware. This allows
+ * us to overcome the ISH-TP 4 Kb limit, and allows us to DMA
+ * directly to ISH UMA at location of choice.
+ * Function depends on corresponding support in ISH firmware.
+ *
+ * Return: 0 for success, negative error code for failure.
+ */
+static int ish_fw_xfer_direct_dma(struct ishtp_cl_data *client_data,
+				  const struct firmware *fw,
+				  const struct shim_fw_info fw_info)
+{
+	int rv;
+	void *dma_buf;
+	dma_addr_t dma_buf_phy;
+	u32 fragment_offset, fragment_size, payload_max_size;
+	struct loader_msg_hdr ldr_xfer_dma_frag_ack;
+	struct loader_xfer_dma_fragment ldr_xfer_dma_frag;
+	struct device *devc = ishtp_get_pci_device(client_data->cl_device);
+	u32 shim_fw_buf_size =
+		fw_info.ldr_capability.max_dma_buf_size;
+
+	/*
+	 * payload_max_size should be set to minimum of
+	 *  (1) Size of firmware to be loaded,
+	 *  (2) Max DMA buffer size supported by Shim firmware,
+	 *  (3) DMA buffer size limit set by boot_param dma_buf_size_limit.
+	 */
+	payload_max_size = min3(fw->size,
+				(size_t)shim_fw_buf_size,
+				(size_t)dma_buf_size_limit);
+
+	/*
+	 * Buffer size should be multiple of cacheline size
+	 * if it's not, select the previous cacheline boundary.
+	 */
+	payload_max_size &= ~(L1_CACHE_BYTES - 1);
+
+	dma_buf = kmalloc(payload_max_size, GFP_KERNEL | GFP_DMA32);
+	if (!dma_buf) {
+		client_data->flag_retry = true;
+		return -ENOMEM;
+	}
+
+	dma_buf_phy = dma_map_single(devc, dma_buf, payload_max_size,
+				     DMA_TO_DEVICE);
+	if (dma_mapping_error(devc, dma_buf_phy)) {
+		dev_err(cl_data_to_dev(client_data), "DMA map failed\n");
+		client_data->flag_retry = true;
+		rv = -ENOMEM;
+		goto end_err_dma_buf_release;
+	}
+
+	ldr_xfer_dma_frag.fragment.hdr.command = LOADER_CMD_XFER_FRAGMENT;
+	ldr_xfer_dma_frag.fragment.xfer_mode = LOADER_XFER_MODE_DIRECT_DMA;
+	ldr_xfer_dma_frag.ddr_phys_addr = (u64)dma_buf_phy;
+
+	/* Send the firmware image in chucks of payload_max_size */
+	fragment_offset = 0;
+	while (fragment_offset < fw->size) {
+		if (fragment_offset + payload_max_size < fw->size) {
+			fragment_size = payload_max_size;
+			ldr_xfer_dma_frag.fragment.is_last = 0;
+		} else {
+			fragment_size = fw->size - fragment_offset;
+			ldr_xfer_dma_frag.fragment.is_last = 1;
+		}
+
+		ldr_xfer_dma_frag.fragment.offset = fragment_offset;
+		ldr_xfer_dma_frag.fragment.size = fragment_size;
+		memcpy(dma_buf, &fw->data[fragment_offset], fragment_size);
+
+		dma_sync_single_for_device(devc, dma_buf_phy,
+					   payload_max_size,
+					   DMA_TO_DEVICE);
+
+		/*
+		 * Flush cache here because the dma_sync_single_for_device()
+		 * does not do for x86.
+		 */
+		clflush_cache_range(dma_buf, payload_max_size);
+
+		dev_dbg(cl_data_to_dev(client_data),
+			"xfer_mode=dma offset=0x%08x size=0x%x is_last=%d ddr_phys_addr=0x%016llx\n",
+			ldr_xfer_dma_frag.fragment.offset,
+			ldr_xfer_dma_frag.fragment.size,
+			ldr_xfer_dma_frag.fragment.is_last,
+			ldr_xfer_dma_frag.ddr_phys_addr);
+
+		rv = loader_cl_send(client_data,
+				    (u8 *)&ldr_xfer_dma_frag,
+				    sizeof(ldr_xfer_dma_frag),
+				    (u8 *)&ldr_xfer_dma_frag_ack,
+				    sizeof(ldr_xfer_dma_frag_ack));
+		if (rv < 0) {
+			client_data->flag_retry = true;
+			goto end_err_resp_buf_release;
+		}
+
+		fragment_offset += fragment_size;
+	}
+
+	dma_unmap_single(devc, dma_buf_phy, payload_max_size, DMA_TO_DEVICE);
+	kfree(dma_buf);
+	return 0;
+
+end_err_resp_buf_release:
+	/* Free ISH buffer if not done already, in error case */
+	dma_unmap_single(devc, dma_buf_phy, payload_max_size, DMA_TO_DEVICE);
+end_err_dma_buf_release:
+	kfree(dma_buf);
+	return rv;
+}
+
+/**
+ * ish_fw_start()	Start executing ISH main firmware
+ * @client_data:	client data instance
+ *
+ * This function sends message to Shim firmware loader to start
+ * the execution of ISH main firmware.
+ *
+ * Return: 0 for success, negative error code for failure.
+ */
+static int ish_fw_start(struct ishtp_cl_data *client_data)
+{
+	struct loader_start ldr_start;
+	struct loader_msg_hdr ldr_start_ack;
+
+	memset(&ldr_start, 0, sizeof(ldr_start));
+	ldr_start.hdr.command = LOADER_CMD_START;
+	return loader_cl_send(client_data,
+			    (u8 *)&ldr_start,
+			    sizeof(ldr_start),
+			    (u8 *)&ldr_start_ack,
+			    sizeof(ldr_start_ack));
+}
+
+/**
+ * load_fw_from_host()	Loads ISH firmware from host
+ * @client_data:	Client data instance
+ *
+ * This function loads the ISH firmware to ISH SRAM and starts execution
+ *
+ * Return: 0 for success, negative error code for failure.
+ */
+static int load_fw_from_host(struct ishtp_cl_data *client_data)
+{
+	int rv;
+	u32 xfer_mode;
+	char *filename;
+	const struct firmware *fw;
+	struct shim_fw_info fw_info;
+	struct ishtp_cl *loader_ishtp_cl = client_data->loader_ishtp_cl;
+
+	client_data->flag_retry = false;
+
+	filename = kzalloc(FILENAME_SIZE, GFP_KERNEL);
+	if (!filename) {
+		client_data->flag_retry = true;
+		rv = -ENOMEM;
+		goto end_error;
+	}
+
+	/* Get filename of the ISH firmware to be loaded */
+	rv = get_firmware_variant(client_data, filename);
+	if (rv < 0)
+		goto end_err_filename_buf_release;
+
+	rv = request_firmware(&fw, filename, cl_data_to_dev(client_data));
+	if (rv < 0)
+		goto end_err_filename_buf_release;
+
+	/* Step 1: Query Shim firmware loader properties */
+
+	rv = ish_query_loader_prop(client_data, fw, &fw_info);
+	if (rv < 0)
+		goto end_err_fw_release;
+
+	/* Step 2: Send the main firmware image to be loaded, to ISH SRAM */
+
+	xfer_mode = fw_info.ldr_capability.xfer_mode;
+	if (xfer_mode & LOADER_XFER_MODE_DIRECT_DMA) {
+		rv = ish_fw_xfer_direct_dma(client_data, fw, fw_info);
+	} else if (xfer_mode & LOADER_XFER_MODE_ISHTP) {
+		rv = ish_fw_xfer_ishtp(client_data, fw);
+	} else {
+		dev_err(cl_data_to_dev(client_data),
+			"No transfer mode selected in firmware\n");
+		rv = -EINVAL;
+	}
+	if (rv < 0)
+		goto end_err_fw_release;
+
+	/* Step 3: Start ISH main firmware exeuction */
+
+	rv = ish_fw_start(client_data);
+	if (rv < 0)
+		goto end_err_fw_release;
+
+	release_firmware(fw);
+	dev_info(cl_data_to_dev(client_data), "ISH firmware %s loaded\n",
+		 filename);
+	kfree(filename);
+	return 0;
+
+end_err_fw_release:
+	release_firmware(fw);
+end_err_filename_buf_release:
+	kfree(filename);
+end_error:
+	/* Keep a count of retries, and give up after 3 attempts */
+	if (client_data->flag_retry &&
+	    client_data->retry_count++ < MAX_LOAD_ATTEMPTS) {
+		dev_warn(cl_data_to_dev(client_data),
+			 "ISH host firmware load failed %d. Resetting ISH, and trying again..\n",
+			 rv);
+		ish_hw_reset(ishtp_get_ishtp_device(loader_ishtp_cl));
+	} else {
+		dev_err(cl_data_to_dev(client_data),
+			"ISH host firmware load failed %d\n", rv);
+	}
+	return rv;
+}
+
+static void load_fw_from_host_handler(struct work_struct *work)
+{
+	struct ishtp_cl_data *client_data;
+
+	client_data = container_of(work, struct ishtp_cl_data,
+				   work_fw_load);
+	load_fw_from_host(client_data);
+}
+
+/**
+ * loader_init() -	Init function for ISH-TP client
+ * @loader_ishtp_cl:	ISH-TP client instance
+ * @reset:		true if called for init after reset
+ *
+ * Return: 0 for success, negative error code for failure
+ */
+static int loader_init(struct ishtp_cl *loader_ishtp_cl, int reset)
+{
+	int rv;
+	struct ishtp_fw_client *fw_client;
+	struct ishtp_cl_data *client_data =
+		ishtp_get_client_data(loader_ishtp_cl);
+
+	dev_dbg(cl_data_to_dev(client_data), "reset flag: %d\n", reset);
+
+	rv = ishtp_cl_link(loader_ishtp_cl);
+	if (rv < 0) {
+		dev_err(cl_data_to_dev(client_data), "ishtp_cl_link failed\n");
+		return rv;
+	}
+
+	/* Connect to firmware client */
+	ishtp_set_tx_ring_size(loader_ishtp_cl, LOADER_CL_TX_RING_SIZE);
+	ishtp_set_rx_ring_size(loader_ishtp_cl, LOADER_CL_RX_RING_SIZE);
+
+	fw_client =
+		ishtp_fw_cl_get_client(ishtp_get_ishtp_device(loader_ishtp_cl),
+				       &loader_ishtp_guid);
+	if (!fw_client) {
+		dev_err(cl_data_to_dev(client_data),
+			"ISH client uuid not found\n");
+		rv = -ENOENT;
+		goto err_cl_unlink;
+	}
+
+	ishtp_cl_set_fw_client_id(loader_ishtp_cl,
+				  ishtp_get_fw_client_id(fw_client));
+	ishtp_set_connection_state(loader_ishtp_cl, ISHTP_CL_CONNECTING);
+
+	rv = ishtp_cl_connect(loader_ishtp_cl);
+	if (rv < 0) {
+		dev_err(cl_data_to_dev(client_data), "Client connect fail\n");
+		goto err_cl_unlink;
+	}
+
+	dev_dbg(cl_data_to_dev(client_data), "Client connected\n");
+
+	ishtp_register_event_cb(client_data->cl_device, loader_cl_event_cb);
+
+	return 0;
+
+err_cl_unlink:
+	ishtp_cl_unlink(loader_ishtp_cl);
+	return rv;
+}
+
+static void loader_deinit(struct ishtp_cl *loader_ishtp_cl)
+{
+	ishtp_set_connection_state(loader_ishtp_cl, ISHTP_CL_DISCONNECTING);
+	ishtp_cl_disconnect(loader_ishtp_cl);
+	ishtp_cl_unlink(loader_ishtp_cl);
+	ishtp_cl_flush_queues(loader_ishtp_cl);
+
+	/* Disband and free all Tx and Rx client-level rings */
+	ishtp_cl_free(loader_ishtp_cl);
+}
+
+static void reset_handler(struct work_struct *work)
+{
+	int rv;
+	struct ishtp_cl_data *client_data;
+	struct ishtp_cl *loader_ishtp_cl;
+	struct ishtp_cl_device *cl_device;
+
+	client_data = container_of(work, struct ishtp_cl_data,
+				   work_ishtp_reset);
+
+	loader_ishtp_cl = client_data->loader_ishtp_cl;
+	cl_device = client_data->cl_device;
+
+	/* Unlink, flush queues & start again */
+	ishtp_cl_unlink(loader_ishtp_cl);
+	ishtp_cl_flush_queues(loader_ishtp_cl);
+	ishtp_cl_free(loader_ishtp_cl);
+
+	loader_ishtp_cl = ishtp_cl_allocate(cl_device);
+	if (!loader_ishtp_cl)
+		return;
+
+	ishtp_set_drvdata(cl_device, loader_ishtp_cl);
+	ishtp_set_client_data(loader_ishtp_cl, client_data);
+	client_data->loader_ishtp_cl = loader_ishtp_cl;
+	client_data->cl_device = cl_device;
+
+	rv = loader_init(loader_ishtp_cl, 1);
+	if (rv < 0) {
+		dev_err(ishtp_device(cl_device), "Reset Failed\n");
+		return;
+	}
+
+	/* ISH firmware loading from host */
+	load_fw_from_host(client_data);
+}
+
+/**
+ * loader_ishtp_cl_probe() - ISH-TP client driver probe
+ * @cl_device:		ISH-TP client device instance
+ *
+ * This function gets called on device create on ISH-TP bus
+ *
+ * Return: 0 for success, negative error code for failure
+ */
+static int loader_ishtp_cl_probe(struct ishtp_cl_device *cl_device)
+{
+	struct ishtp_cl *loader_ishtp_cl;
+	struct ishtp_cl_data *client_data;
+	int rv;
+
+	client_data = devm_kzalloc(ishtp_device(cl_device),
+				   sizeof(*client_data),
+				   GFP_KERNEL);
+	if (!client_data)
+		return -ENOMEM;
+
+	loader_ishtp_cl = ishtp_cl_allocate(cl_device);
+	if (!loader_ishtp_cl)
+		return -ENOMEM;
+
+	ishtp_set_drvdata(cl_device, loader_ishtp_cl);
+	ishtp_set_client_data(loader_ishtp_cl, client_data);
+	client_data->loader_ishtp_cl = loader_ishtp_cl;
+	client_data->cl_device = cl_device;
+
+	init_waitqueue_head(&client_data->response.wait_queue);
+
+	INIT_WORK(&client_data->work_ishtp_reset,
+		  reset_handler);
+	INIT_WORK(&client_data->work_fw_load,
+		  load_fw_from_host_handler);
+
+	rv = loader_init(loader_ishtp_cl, 0);
+	if (rv < 0) {
+		ishtp_cl_free(loader_ishtp_cl);
+		return rv;
+	}
+	ishtp_get_device(cl_device);
+
+	client_data->retry_count = 0;
+
+	/* ISH firmware loading from host */
+	schedule_work(&client_data->work_fw_load);
+
+	return 0;
+}
+
+/**
+ * loader_ishtp_cl_remove() - ISH-TP client driver remove
+ * @cl_device:		ISH-TP client device instance
+ *
+ * This function gets called on device remove on ISH-TP bus
+ *
+ * Return: 0
+ */
+static int loader_ishtp_cl_remove(struct ishtp_cl_device *cl_device)
+{
+	struct ishtp_cl_data *client_data;
+	struct ishtp_cl	*loader_ishtp_cl = ishtp_get_drvdata(cl_device);
+
+	client_data = ishtp_get_client_data(loader_ishtp_cl);
+
+	/*
+	 * The sequence of the following two cancel_work_sync() is
+	 * important. The work_fw_load can in turn schedue
+	 * work_ishtp_reset, so first cancel work_fw_load then
+	 * cancel work_ishtp_reset.
+	 */
+	cancel_work_sync(&client_data->work_fw_load);
+	cancel_work_sync(&client_data->work_ishtp_reset);
+	loader_deinit(loader_ishtp_cl);
+	ishtp_put_device(cl_device);
+
+	return 0;
+}
+
+/**
+ * loader_ishtp_cl_reset() - ISH-TP client driver reset
+ * @cl_device:		ISH-TP client device instance
+ *
+ * This function gets called on device reset on ISH-TP bus
+ *
+ * Return: 0
+ */
+static int loader_ishtp_cl_reset(struct ishtp_cl_device *cl_device)
+{
+	struct ishtp_cl_data *client_data;
+	struct ishtp_cl	*loader_ishtp_cl = ishtp_get_drvdata(cl_device);
+
+	client_data = ishtp_get_client_data(loader_ishtp_cl);
+
+	schedule_work(&client_data->work_ishtp_reset);
+
+	return 0;
+}
+
+static struct ishtp_cl_driver	loader_ishtp_cl_driver = {
+	.name = "ish-loader",
+	.guid = &loader_ishtp_guid,
+	.probe = loader_ishtp_cl_probe,
+	.remove = loader_ishtp_cl_remove,
+	.reset = loader_ishtp_cl_reset,
+};
+
+static int __init ish_loader_init(void)
+{
+	return ishtp_cl_driver_register(&loader_ishtp_cl_driver, THIS_MODULE);
+}
+
+static void __exit ish_loader_exit(void)
+{
+	ishtp_cl_driver_unregister(&loader_ishtp_cl_driver);
+}
+
+late_initcall(ish_loader_init);
+module_exit(ish_loader_exit);
+
+module_param(dma_buf_size_limit, int, 0644);
+MODULE_PARM_DESC(dma_buf_size_limit, "Limit the DMA buf size to this value in bytes");
+
+MODULE_DESCRIPTION("ISH ISH-TP Host firmware Loader Client Driver");
+MODULE_AUTHOR("Rushikesh S Kadam <rushikesh.s.kadam@intel.com>");
+
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("ishtp:*");
diff --git a/drivers/hid/intel-ish-hid/ishtp-hid-client.c b/drivers/hid/intel-ish-hid/ishtp-hid-client.c
index 30fe0c5e6fad..6ba944b40fdb 100644
--- a/drivers/hid/intel-ish-hid/ishtp-hid-client.c
+++ b/drivers/hid/intel-ish-hid/ishtp-hid-client.c
@@ -1,29 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * ISHTP client driver for HID (ISH)
  *
  * Copyright (c) 2014-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 
 #include <linux/module.h>
 #include <linux/hid.h>
+#include <linux/intel-ish-client-if.h>
 #include <linux/sched.h>
-#include "ishtp/ishtp-dev.h"
-#include "ishtp/client.h"
 #include "ishtp-hid.h"
 
 /* Rx ring buffer pool size */
 #define HID_CL_RX_RING_SIZE	32
 #define HID_CL_TX_RING_SIZE	16
 
+#define cl_data_to_dev(client_data) ishtp_device(client_data->cl_device)
+
 /**
  * report_bad_packets() - Report bad packets
  * @hid_ishtp_cl:	Client instance to get stats
@@ -37,9 +30,9 @@ static void report_bad_packet(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
 			      size_t cur_pos,  size_t payload_len)
 {
 	struct hostif_msg *recv_msg = recv_buf;
-	struct ishtp_cl_data *client_data = hid_ishtp_cl->client_data;
+	struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
 
-	dev_err(&client_data->cl_device->dev, "[hid-ish]: BAD packet %02X\n"
+	dev_err(cl_data_to_dev(client_data), "[hid-ish]: BAD packet %02X\n"
 		"total_bad=%u cur_pos=%u\n"
 		"[%02X %02X %02X %02X]\n"
 		"payload_len=%u\n"
@@ -69,13 +62,15 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
 	unsigned char *payload;
 	struct device_info *dev_info;
 	int i, j;
-	size_t	payload_len, total_len, cur_pos;
+	size_t	payload_len, total_len, cur_pos, raw_len;
 	int report_type;
 	struct report_list *reports_list;
 	char *reports;
 	size_t report_len;
-	struct ishtp_cl_data *client_data = hid_ishtp_cl->client_data;
+	struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
 	int curr_hid_dev = client_data->cur_hid_dev;
+	struct ishtp_hid_data *hid_data = NULL;
+	struct hid_device *hid = NULL;
 
 	payload = recv_buf + sizeof(struct hostif_msg_hdr);
 	total_len = data_len;
@@ -83,12 +78,12 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
 
 	do {
 		if (cur_pos + sizeof(struct hostif_msg) > total_len) {
-			dev_err(&client_data->cl_device->dev,
+			dev_err(cl_data_to_dev(client_data),
 				"[hid-ish]: error, received %u which is less than data header %u\n",
 				(unsigned int)data_len,
 				(unsigned int)sizeof(struct hostif_msg_hdr));
 			++client_data->bad_recv_cnt;
-			ish_hw_reset(hid_ishtp_cl->dev);
+			ish_hw_reset(ishtp_get_ishtp_device(hid_ishtp_cl));
 			break;
 		}
 
@@ -101,7 +96,7 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
 			++client_data->bad_recv_cnt;
 			report_bad_packet(hid_ishtp_cl, recv_msg, cur_pos,
 					  payload_len);
-			ish_hw_reset(hid_ishtp_cl->dev);
+			ish_hw_reset(ishtp_get_ishtp_device(hid_ishtp_cl));
 			break;
 		}
 
@@ -116,18 +111,18 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
 				report_bad_packet(hid_ishtp_cl, recv_msg,
 						  cur_pos,
 						  payload_len);
-				ish_hw_reset(hid_ishtp_cl->dev);
+				ish_hw_reset(ishtp_get_ishtp_device(hid_ishtp_cl));
 				break;
 			}
 			client_data->hid_dev_count = (unsigned int)*payload;
 			if (!client_data->hid_devices)
 				client_data->hid_devices = devm_kcalloc(
-						&client_data->cl_device->dev,
+						cl_data_to_dev(client_data),
 						client_data->hid_dev_count,
 						sizeof(struct device_info),
 						GFP_KERNEL);
 			if (!client_data->hid_devices) {
-				dev_err(&client_data->cl_device->dev,
+				dev_err(cl_data_to_dev(client_data),
 				"Mem alloc failed for hid device info\n");
 				wake_up_interruptible(&client_data->init_wait);
 				break;
@@ -135,7 +130,7 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
 			for (i = 0; i < client_data->hid_dev_count; ++i) {
 				if (1 + sizeof(struct device_info) * i >=
 						payload_len) {
-					dev_err(&client_data->cl_device->dev,
+					dev_err(cl_data_to_dev(client_data),
 						"[hid-ish]: [ENUM_DEVICES]: content size %zu is bigger than payload_len %zu\n",
 						1 + sizeof(struct device_info)
 						* i, payload_len);
@@ -165,12 +160,12 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
 				report_bad_packet(hid_ishtp_cl, recv_msg,
 						  cur_pos,
 						  payload_len);
-				ish_hw_reset(hid_ishtp_cl->dev);
+				ish_hw_reset(ishtp_get_ishtp_device(hid_ishtp_cl));
 				break;
 			}
 			if (!client_data->hid_descr[curr_hid_dev])
 				client_data->hid_descr[curr_hid_dev] =
-				devm_kmalloc(&client_data->cl_device->dev,
+				devm_kmalloc(cl_data_to_dev(client_data),
 					     payload_len, GFP_KERNEL);
 			if (client_data->hid_descr[curr_hid_dev]) {
 				memcpy(client_data->hid_descr[curr_hid_dev],
@@ -190,12 +185,12 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
 				report_bad_packet(hid_ishtp_cl, recv_msg,
 						  cur_pos,
 						  payload_len);
-				ish_hw_reset(hid_ishtp_cl->dev);
+				ish_hw_reset(ishtp_get_ishtp_device(hid_ishtp_cl));
 				break;
 			}
 			if (!client_data->report_descr[curr_hid_dev])
 				client_data->report_descr[curr_hid_dev] =
-				devm_kmalloc(&client_data->cl_device->dev,
+				devm_kmalloc(cl_data_to_dev(client_data),
 					     payload_len, GFP_KERNEL);
 			if (client_data->report_descr[curr_hid_dev])  {
 				memcpy(client_data->report_descr[curr_hid_dev],
@@ -219,18 +214,31 @@ do_get_report:
 			/* Get index of device that matches this id */
 			for (i = 0; i < client_data->num_hid_devices; ++i) {
 				if (recv_msg->hdr.device_id ==
-					client_data->hid_devices[i].dev_id)
-					if (client_data->hid_sensor_hubs[i]) {
-						hid_input_report(
-						client_data->hid_sensor_hubs[
-									i],
-						report_type, payload,
-						payload_len, 0);
-						ishtp_hid_wakeup(
-						client_data->hid_sensor_hubs[
-							i]);
+					  client_data->hid_devices[i].dev_id) {
+					hid = client_data->hid_sensor_hubs[i];
+					if (!hid)
 						break;
+
+					hid_data = hid->driver_data;
+					if (hid_data->raw_get_req) {
+						raw_len =
+						  (hid_data->raw_buf_size <
+								payload_len) ?
+						  hid_data->raw_buf_size :
+						  payload_len;
+
+						memcpy(hid_data->raw_buf,
+						       payload, raw_len);
+					} else {
+						hid_input_report
+							(hid, report_type,
+							 payload, payload_len,
+							 0);
 					}
+
+					ishtp_hid_wakeup(hid);
+					break;
+				}
 			}
 			break;
 
@@ -295,7 +303,7 @@ do_get_report:
 			++client_data->bad_recv_cnt;
 			report_bad_packet(hid_ishtp_cl, recv_msg, cur_pos,
 					  payload_len);
-			ish_hw_reset(hid_ishtp_cl->dev);
+			ish_hw_reset(ishtp_get_ishtp_device(hid_ishtp_cl));
 			break;
 
 		}
@@ -475,7 +483,7 @@ int ishtp_hid_link_ready_wait(struct ishtp_cl_data *client_data)
 static int ishtp_enum_enum_devices(struct ishtp_cl *hid_ishtp_cl)
 {
 	struct hostif_msg msg;
-	struct ishtp_cl_data *client_data = hid_ishtp_cl->client_data;
+	struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
 	int retry_count;
 	int rv;
 
@@ -501,18 +509,18 @@ static int ishtp_enum_enum_devices(struct ishtp_cl *hid_ishtp_cl)
 					   sizeof(struct hostif_msg));
 	}
 	if (!client_data->enum_devices_done) {
-		dev_err(&client_data->cl_device->dev,
+		dev_err(cl_data_to_dev(client_data),
 			"[hid-ish]: timed out waiting for enum_devices\n");
 		return -ETIMEDOUT;
 	}
 	if (!client_data->hid_devices) {
-		dev_err(&client_data->cl_device->dev,
+		dev_err(cl_data_to_dev(client_data),
 			"[hid-ish]: failed to allocate HID dev structures\n");
 		return -ENOMEM;
 	}
 
 	client_data->num_hid_devices = client_data->hid_dev_count;
-	dev_info(&hid_ishtp_cl->device->dev,
+	dev_info(ishtp_device(client_data->cl_device),
 		"[hid-ish]: enum_devices_done OK, num_hid_devices=%d\n",
 		client_data->num_hid_devices);
 
@@ -531,7 +539,7 @@ static int ishtp_enum_enum_devices(struct ishtp_cl *hid_ishtp_cl)
 static int ishtp_get_hid_descriptor(struct ishtp_cl *hid_ishtp_cl, int index)
 {
 	struct hostif_msg msg;
-	struct ishtp_cl_data *client_data = hid_ishtp_cl->client_data;
+	struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
 	int rv;
 
 	/* Get HID descriptor */
@@ -549,13 +557,13 @@ static int ishtp_get_hid_descriptor(struct ishtp_cl *hid_ishtp_cl, int index)
 						 client_data->hid_descr_done,
 						 3 * HZ);
 		if (!client_data->hid_descr_done) {
-			dev_err(&client_data->cl_device->dev,
+			dev_err(cl_data_to_dev(client_data),
 				"[hid-ish]: timed out for hid_descr_done\n");
 			return -EIO;
 		}
 
 		if (!client_data->hid_descr[index]) {
-			dev_err(&client_data->cl_device->dev,
+			dev_err(cl_data_to_dev(client_data),
 				"[hid-ish]: allocation HID desc fail\n");
 			return -ENOMEM;
 		}
@@ -578,7 +586,7 @@ static int ishtp_get_report_descriptor(struct ishtp_cl *hid_ishtp_cl,
 				       int index)
 {
 	struct hostif_msg msg;
-	struct ishtp_cl_data *client_data = hid_ishtp_cl->client_data;
+	struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
 	int rv;
 
 	/* Get report descriptor */
@@ -596,12 +604,12 @@ static int ishtp_get_report_descriptor(struct ishtp_cl *hid_ishtp_cl,
 					 client_data->report_descr_done,
 					 3 * HZ);
 	if (!client_data->report_descr_done) {
-		dev_err(&client_data->cl_device->dev,
+		dev_err(cl_data_to_dev(client_data),
 				"[hid-ish]: timed out for report descr\n");
 		return -EIO;
 	}
 	if (!client_data->report_descr[index]) {
-		dev_err(&client_data->cl_device->dev,
+		dev_err(cl_data_to_dev(client_data),
 			"[hid-ish]: failed to alloc report descr\n");
 		return -ENOMEM;
 	}
@@ -626,42 +634,42 @@ static int ishtp_get_report_descriptor(struct ishtp_cl *hid_ishtp_cl,
 static int hid_ishtp_cl_init(struct ishtp_cl *hid_ishtp_cl, int reset)
 {
 	struct ishtp_device *dev;
-	struct ishtp_cl_data *client_data = hid_ishtp_cl->client_data;
+	struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
 	struct ishtp_fw_client *fw_client;
 	int i;
 	int rv;
 
-	dev_dbg(&client_data->cl_device->dev, "%s\n", __func__);
+	dev_dbg(cl_data_to_dev(client_data), "%s\n", __func__);
 	hid_ishtp_trace(client_data,  "%s reset flag: %d\n", __func__, reset);
 
-	rv = ishtp_cl_link(hid_ishtp_cl, ISHTP_HOST_CLIENT_ID_ANY);
+	rv = ishtp_cl_link(hid_ishtp_cl);
 	if (rv) {
-		dev_err(&client_data->cl_device->dev,
+		dev_err(cl_data_to_dev(client_data),
 			"ishtp_cl_link failed\n");
 		return	-ENOMEM;
 	}
 
 	client_data->init_done = 0;
 
-	dev = hid_ishtp_cl->dev;
+	dev = ishtp_get_ishtp_device(hid_ishtp_cl);
 
 	/* Connect to FW client */
-	hid_ishtp_cl->rx_ring_size = HID_CL_RX_RING_SIZE;
-	hid_ishtp_cl->tx_ring_size = HID_CL_TX_RING_SIZE;
+	ishtp_set_tx_ring_size(hid_ishtp_cl, HID_CL_TX_RING_SIZE);
+	ishtp_set_rx_ring_size(hid_ishtp_cl, HID_CL_RX_RING_SIZE);
 
 	fw_client = ishtp_fw_cl_get_client(dev, &hid_ishtp_guid);
 	if (!fw_client) {
-		dev_err(&client_data->cl_device->dev,
+		dev_err(cl_data_to_dev(client_data),
 			"ish client uuid not found\n");
 		return -ENOENT;
 	}
-
-	hid_ishtp_cl->fw_client_id = fw_client->client_id;
-	hid_ishtp_cl->state = ISHTP_CL_CONNECTING;
+	ishtp_cl_set_fw_client_id(hid_ishtp_cl,
+				  ishtp_get_fw_client_id(fw_client));
+	ishtp_set_connection_state(hid_ishtp_cl, ISHTP_CL_CONNECTING);
 
 	rv = ishtp_cl_connect(hid_ishtp_cl);
 	if (rv) {
-		dev_err(&client_data->cl_device->dev,
+		dev_err(cl_data_to_dev(client_data),
 			"client connect fail\n");
 		goto err_cl_unlink;
 	}
@@ -669,7 +677,7 @@ static int hid_ishtp_cl_init(struct ishtp_cl *hid_ishtp_cl, int reset)
 	hid_ishtp_trace(client_data,  "%s client connected\n", __func__);
 
 	/* Register read callback */
-	ishtp_register_event_cb(hid_ishtp_cl->device, ish_cl_event_cb);
+	ishtp_register_event_cb(client_data->cl_device, ish_cl_event_cb);
 
 	rv = ishtp_enum_enum_devices(hid_ishtp_cl);
 	if (rv)
@@ -692,7 +700,7 @@ static int hid_ishtp_cl_init(struct ishtp_cl *hid_ishtp_cl, int reset)
 		if (!reset) {
 			rv = ishtp_hid_probe(i, client_data);
 			if (rv) {
-				dev_err(&client_data->cl_device->dev,
+				dev_err(cl_data_to_dev(client_data),
 				"[hid-ish]: HID probe for #%u failed: %d\n",
 				i, rv);
 				goto err_cl_disconnect;
@@ -707,7 +715,7 @@ static int hid_ishtp_cl_init(struct ishtp_cl *hid_ishtp_cl, int reset)
 	return 0;
 
 err_cl_disconnect:
-	hid_ishtp_cl->state = ISHTP_CL_DISCONNECTING;
+	ishtp_set_connection_state(hid_ishtp_cl, ISHTP_CL_DISCONNECTING);
 	ishtp_cl_disconnect(hid_ishtp_cl);
 err_cl_unlink:
 	ishtp_cl_unlink(hid_ishtp_cl);
@@ -744,16 +752,16 @@ static void hid_ishtp_cl_reset_handler(struct work_struct *work)
 
 	hid_ishtp_trace(client_data, "%s hid_ishtp_cl %p\n", __func__,
 			hid_ishtp_cl);
-	dev_dbg(&cl_device->dev, "%s\n", __func__);
+	dev_dbg(ishtp_device(client_data->cl_device), "%s\n", __func__);
 
 	hid_ishtp_cl_deinit(hid_ishtp_cl);
 
-	hid_ishtp_cl = ishtp_cl_allocate(cl_device->ishtp_dev);
+	hid_ishtp_cl = ishtp_cl_allocate(cl_device);
 	if (!hid_ishtp_cl)
 		return;
 
 	ishtp_set_drvdata(cl_device, hid_ishtp_cl);
-	hid_ishtp_cl->client_data = client_data;
+	ishtp_set_client_data(hid_ishtp_cl, client_data);
 	client_data->hid_ishtp_cl = hid_ishtp_cl;
 
 	client_data->num_hid_devices = 0;
@@ -762,15 +770,17 @@ static void hid_ishtp_cl_reset_handler(struct work_struct *work)
 		rv = hid_ishtp_cl_init(hid_ishtp_cl, 1);
 		if (!rv)
 			break;
-		dev_err(&client_data->cl_device->dev, "Retry reset init\n");
+		dev_err(cl_data_to_dev(client_data), "Retry reset init\n");
 	}
 	if (rv) {
-		dev_err(&client_data->cl_device->dev, "Reset Failed\n");
+		dev_err(cl_data_to_dev(client_data), "Reset Failed\n");
 		hid_ishtp_trace(client_data, "%s Failed hid_ishtp_cl %p\n",
 				__func__, hid_ishtp_cl);
 	}
 }
 
+void (*hid_print_trace)(void *unused, const char *format, ...);
+
 /**
  * hid_ishtp_cl_probe() - ISHTP client driver probe
  * @cl_device:		ISHTP client device instance
@@ -788,21 +798,18 @@ static int hid_ishtp_cl_probe(struct ishtp_cl_device *cl_device)
 	if (!cl_device)
 		return	-ENODEV;
 
-	if (!guid_equal(&hid_ishtp_guid,
-			&cl_device->fw_client->props.protocol_name))
-		return	-ENODEV;
-
-	client_data = devm_kzalloc(&cl_device->dev, sizeof(*client_data),
+	client_data = devm_kzalloc(ishtp_device(cl_device),
+				   sizeof(*client_data),
 				   GFP_KERNEL);
 	if (!client_data)
 		return -ENOMEM;
 
-	hid_ishtp_cl = ishtp_cl_allocate(cl_device->ishtp_dev);
+	hid_ishtp_cl = ishtp_cl_allocate(cl_device);
 	if (!hid_ishtp_cl)
 		return -ENOMEM;
 
 	ishtp_set_drvdata(cl_device, hid_ishtp_cl);
-	hid_ishtp_cl->client_data = client_data;
+	ishtp_set_client_data(hid_ishtp_cl, client_data);
 	client_data->hid_ishtp_cl = hid_ishtp_cl;
 	client_data->cl_device = cl_device;
 
@@ -811,6 +818,8 @@ static int hid_ishtp_cl_probe(struct ishtp_cl_device *cl_device)
 
 	INIT_WORK(&client_data->work, hid_ishtp_cl_reset_handler);
 
+	hid_print_trace = ishtp_trace_callback(cl_device);
+
 	rv = hid_ishtp_cl_init(hid_ishtp_cl, 0);
 	if (rv) {
 		ishtp_cl_free(hid_ishtp_cl);
@@ -832,13 +841,13 @@ static int hid_ishtp_cl_probe(struct ishtp_cl_device *cl_device)
 static int hid_ishtp_cl_remove(struct ishtp_cl_device *cl_device)
 {
 	struct ishtp_cl *hid_ishtp_cl = ishtp_get_drvdata(cl_device);
-	struct ishtp_cl_data *client_data = hid_ishtp_cl->client_data;
+	struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
 
 	hid_ishtp_trace(client_data, "%s hid_ishtp_cl %p\n", __func__,
 			hid_ishtp_cl);
 
-	dev_dbg(&cl_device->dev, "%s\n", __func__);
-	hid_ishtp_cl->state = ISHTP_CL_DISCONNECTING;
+	dev_dbg(ishtp_device(cl_device), "%s\n", __func__);
+	ishtp_set_connection_state(hid_ishtp_cl, ISHTP_CL_DISCONNECTING);
 	ishtp_cl_disconnect(hid_ishtp_cl);
 	ishtp_put_device(cl_device);
 	ishtp_hid_remove(client_data);
@@ -862,7 +871,7 @@ static int hid_ishtp_cl_remove(struct ishtp_cl_device *cl_device)
 static int hid_ishtp_cl_reset(struct ishtp_cl_device *cl_device)
 {
 	struct ishtp_cl *hid_ishtp_cl = ishtp_get_drvdata(cl_device);
-	struct ishtp_cl_data *client_data = hid_ishtp_cl->client_data;
+	struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
 
 	hid_ishtp_trace(client_data, "%s hid_ishtp_cl %p\n", __func__,
 			hid_ishtp_cl);
@@ -872,8 +881,6 @@ static int hid_ishtp_cl_reset(struct ishtp_cl_device *cl_device)
 	return 0;
 }
 
-#define to_ishtp_cl_device(d) container_of(d, struct ishtp_cl_device, dev)
-
 /**
  * hid_ishtp_cl_suspend() - ISHTP client driver suspend
  * @device:	device instance
@@ -884,9 +891,9 @@ static int hid_ishtp_cl_reset(struct ishtp_cl_device *cl_device)
  */
 static int hid_ishtp_cl_suspend(struct device *device)
 {
-	struct ishtp_cl_device *cl_device = to_ishtp_cl_device(device);
+	struct ishtp_cl_device *cl_device = ishtp_dev_to_cl_device(device);
 	struct ishtp_cl *hid_ishtp_cl = ishtp_get_drvdata(cl_device);
-	struct ishtp_cl_data *client_data = hid_ishtp_cl->client_data;
+	struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
 
 	hid_ishtp_trace(client_data, "%s hid_ishtp_cl %p\n", __func__,
 			hid_ishtp_cl);
@@ -905,9 +912,9 @@ static int hid_ishtp_cl_suspend(struct device *device)
  */
 static int hid_ishtp_cl_resume(struct device *device)
 {
-	struct ishtp_cl_device *cl_device = to_ishtp_cl_device(device);
+	struct ishtp_cl_device *cl_device = ishtp_dev_to_cl_device(device);
 	struct ishtp_cl *hid_ishtp_cl = ishtp_get_drvdata(cl_device);
-	struct ishtp_cl_data *client_data = hid_ishtp_cl->client_data;
+	struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
 
 	hid_ishtp_trace(client_data, "%s hid_ishtp_cl %p\n", __func__,
 			hid_ishtp_cl);
@@ -922,6 +929,7 @@ static const struct dev_pm_ops hid_ishtp_pm_ops = {
 
 static struct ishtp_cl_driver	hid_ishtp_cl_driver = {
 	.name = "ish-hid",
+	.guid = &hid_ishtp_guid,
 	.probe = hid_ishtp_cl_probe,
 	.remove = hid_ishtp_cl_remove,
 	.reset = hid_ishtp_cl_reset,
@@ -933,7 +941,7 @@ static int __init ish_hid_init(void)
 	int	rv;
 
 	/* Register ISHTP client device driver with ISHTP Bus */
-	rv = ishtp_cl_driver_register(&hid_ishtp_cl_driver);
+	rv = ishtp_cl_driver_register(&hid_ishtp_cl_driver, THIS_MODULE);
 
 	return rv;
 
diff --git a/drivers/hid/intel-ish-hid/ishtp-hid.c b/drivers/hid/intel-ish-hid/ishtp-hid.c
index bc4c536f3c0d..b8aae69ad15d 100644
--- a/drivers/hid/intel-ish-hid/ishtp-hid.c
+++ b/drivers/hid/intel-ish-hid/ishtp-hid.c
@@ -1,21 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * ISHTP-HID glue driver.
  *
  * Copyright (c) 2012-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 
 #include <linux/hid.h>
+#include <linux/intel-ish-client-if.h>
 #include <uapi/linux/input.h>
-#include "ishtp/client.h"
 #include "ishtp-hid.h"
 
 /**
@@ -59,10 +51,46 @@ static void ishtp_hid_close(struct hid_device *hid)
 {
 }
 
-static int ishtp_raw_request(struct hid_device *hdev, unsigned char reportnum,
-	__u8 *buf, size_t len, unsigned char rtype, int reqtype)
+static int ishtp_raw_request(struct hid_device *hid, unsigned char reportnum,
+			     __u8 *buf, size_t len, unsigned char rtype,
+			     int reqtype)
 {
-	return 0;
+	struct ishtp_hid_data *hid_data =  hid->driver_data;
+	char *ishtp_buf = NULL;
+	size_t ishtp_buf_len;
+	unsigned int header_size = sizeof(struct hostif_msg);
+
+	if (rtype == HID_OUTPUT_REPORT)
+		return -EINVAL;
+
+	hid_data->request_done = false;
+	switch (reqtype) {
+	case HID_REQ_GET_REPORT:
+		hid_data->raw_buf = buf;
+		hid_data->raw_buf_size = len;
+		hid_data->raw_get_req = true;
+
+		hid_ishtp_get_report(hid, reportnum, rtype);
+		break;
+	case HID_REQ_SET_REPORT:
+		/*
+		 * Spare 7 bytes for 64b accesses through
+		 * get/put_unaligned_le64()
+		 */
+		ishtp_buf_len = len + header_size;
+		ishtp_buf = kzalloc(ishtp_buf_len + 7, GFP_KERNEL);
+		if (!ishtp_buf)
+			return -ENOMEM;
+
+		memcpy(ishtp_buf + header_size, buf, len);
+		hid_ishtp_set_feature(hid, ishtp_buf, ishtp_buf_len, reportnum);
+		kfree(ishtp_buf);
+		break;
+	}
+
+	hid_hw_wait(hid);
+
+	return len;
 }
 
 /**
@@ -87,6 +115,7 @@ static void ishtp_hid_request(struct hid_device *hid, struct hid_report *rep,
 	hid_data->request_done = false;
 	switch (reqtype) {
 	case HID_REQ_GET_REPORT:
+		hid_data->raw_get_req = false;
 		hid_ishtp_get_report(hid, rep->id, rep->type);
 		break;
 	case HID_REQ_SET_REPORT:
@@ -116,7 +145,6 @@ static void ishtp_hid_request(struct hid_device *hid, struct hid_report *rep,
 static int ishtp_wait_for_response(struct hid_device *hid)
 {
 	struct ishtp_hid_data *hid_data =  hid->driver_data;
-	struct ishtp_cl_data *client_data = hid_data->client_data;
 	int rv;
 
 	hid_ishtp_trace(client_data,  "%s hid %p\n", __func__, hid);
@@ -204,7 +232,8 @@ int ishtp_hid_probe(unsigned int cur_hid_dev,
 
 	hid->ll_driver = &ishtp_hid_ll_driver;
 	hid->bus = BUS_INTEL_ISHTP;
-	hid->dev.parent = &client_data->cl_device->dev;
+	hid->dev.parent = ishtp_device(client_data->cl_device);
+
 	hid->version = le16_to_cpu(ISH_HID_VERSION);
 	hid->vendor = le16_to_cpu(client_data->hid_devices[cur_hid_dev].vid);
 	hid->product = le16_to_cpu(client_data->hid_devices[cur_hid_dev].pid);
diff --git a/drivers/hid/intel-ish-hid/ishtp-hid.h b/drivers/hid/intel-ish-hid/ishtp-hid.h
index 1cd07a441cd4..5ffd0da3cf1f 100644
--- a/drivers/hid/intel-ish-hid/ishtp-hid.h
+++ b/drivers/hid/intel-ish-hid/ishtp-hid.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * ISHTP-HID glue driver's definitions.
  *
  * Copyright (c) 2014-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 #ifndef ISHTP_HID__H
 #define	ISHTP_HID__H
@@ -24,9 +16,9 @@
 #define	IS_RESPONSE	0x80
 
 /* Used to dump to Linux trace buffer, if enabled */
-#define hid_ishtp_trace(client, ...)	\
-	client->cl_device->ishtp_dev->print_log(\
-		client->cl_device->ishtp_dev, __VA_ARGS__)
+extern void (*hid_print_trace)(void *unused, const char *format, ...);
+#define hid_ishtp_trace(client, ...) \
+		(hid_print_trace)(NULL, __VA_ARGS__)
 
 /* ISH Transport protocol (ISHTP in short) GUID */
 static const guid_t hid_ishtp_guid =
@@ -159,6 +151,9 @@ struct ishtp_cl_data {
  * @client_data:	Link to the client instance
  * @hid_wait:		Completion waitq
  *
+ * @raw_get_req:	Flag indicating raw get request ongoing
+ * @raw_buf:		raw request buffer filled on receiving get report
+ * @raw_buf_size:	raw request buffer size
  * Used to tie hid hid->driver data to driver client instance
  */
 struct ishtp_hid_data {
@@ -166,6 +161,11 @@ struct ishtp_hid_data {
 	bool request_done;
 	struct ishtp_cl_data *client_data;
 	wait_queue_head_t hid_wait;
+
+	/* raw request */
+	bool raw_get_req;
+	u8 *raw_buf;
+	size_t raw_buf_size;
 };
 
 /* Interface functions between HID LL driver and ISH TP client */
diff --git a/drivers/hid/intel-ish-hid/ishtp/bus.c b/drivers/hid/intel-ish-hid/ishtp/bus.c
index d5f4b6438d86..c47c3328a0f4 100644
--- a/drivers/hid/intel-ish-hid/ishtp/bus.c
+++ b/drivers/hid/intel-ish-hid/ishtp/bus.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * ISHTP bus driver
  *
  * Copyright (c) 2012-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 
 #include <linux/module.h>
@@ -171,6 +163,19 @@ struct ishtp_fw_client *ishtp_fw_cl_get_client(struct ishtp_device *dev,
 EXPORT_SYMBOL(ishtp_fw_cl_get_client);
 
 /**
+ * ishtp_get_fw_client_id() - Get fw client id
+ *
+ * This interface is used to reset HW get FW client id.
+ *
+ * Return: firmware client id.
+ */
+int ishtp_get_fw_client_id(struct ishtp_fw_client *fw_client)
+{
+	return fw_client->client_id;
+}
+EXPORT_SYMBOL(ishtp_get_fw_client_id);
+
+/**
  * ishtp_fw_cl_by_id() - return index to fw_clients for client_id
  * @dev: the ishtp device structure
  * @client_id: fw client id to search
@@ -220,6 +225,26 @@ static int ishtp_cl_device_probe(struct device *dev)
 }
 
 /**
+ * ishtp_cl_bus_match() - Bus match() callback
+ * @dev: the device structure
+ * @drv: the driver structure
+ *
+ * This is a bus match callback, called when a new ishtp_cl_device is
+ * registered during ishtp bus client enumeration. Use the guid_t in
+ * drv and dev to decide whether they match or not.
+ *
+ * Return: 1 if dev & drv matches, 0 otherwise.
+ */
+static int ishtp_cl_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct ishtp_cl_device *device = to_ishtp_cl_device(dev);
+	struct ishtp_cl_driver *driver = to_ishtp_cl_driver(drv);
+
+	return guid_equal(driver->guid,
+			  &device->fw_client->props.protocol_name);
+}
+
+/**
  * ishtp_cl_device_remove() - Bus remove() callback
  * @dev: the device structure
  *
@@ -372,6 +397,7 @@ static struct bus_type ishtp_cl_bus_type = {
 	.name		= "ishtp",
 	.dev_groups	= ishtp_cl_dev_groups,
 	.probe		= ishtp_cl_device_probe,
+	.match		= ishtp_cl_bus_match,
 	.remove		= ishtp_cl_device_remove,
 	.pm		= &ishtp_cl_bus_dev_pm_ops,
 	.uevent		= ishtp_cl_uevent,
@@ -464,7 +490,7 @@ static void ishtp_bus_remove_device(struct ishtp_cl_device *device)
 }
 
 /**
- * __ishtp_cl_driver_register() - Client driver register
+ * ishtp_cl_driver_register() - Client driver register
  * @driver:	the client driver instance
  * @owner:	Owner of this driver module
  *
@@ -473,8 +499,8 @@ static void ishtp_bus_remove_device(struct ishtp_cl_device *device)
  *
  * Return: Return value of driver_register or -ENODEV if not ready
  */
-int __ishtp_cl_driver_register(struct ishtp_cl_driver *driver,
-			       struct module *owner)
+int ishtp_cl_driver_register(struct ishtp_cl_driver *driver,
+			     struct module *owner)
 {
 	int err;
 
@@ -491,7 +517,7 @@ int __ishtp_cl_driver_register(struct ishtp_cl_driver *driver,
 
 	return 0;
 }
-EXPORT_SYMBOL(__ishtp_cl_driver_register);
+EXPORT_SYMBOL(ishtp_cl_driver_register);
 
 /**
  * ishtp_cl_driver_unregister() - Client driver unregister
@@ -613,6 +639,20 @@ void *ishtp_get_drvdata(struct ishtp_cl_device *cl_device)
 EXPORT_SYMBOL(ishtp_get_drvdata);
 
 /**
+ * ishtp_dev_to_cl_device() - get ishtp_cl_device instance from device instance
+ * @device: device instance
+ *
+ * Get ish_cl_device instance which embeds device instance in it.
+ *
+ * Return: pointer to ishtp_cl_device instance
+ */
+struct ishtp_cl_device *ishtp_dev_to_cl_device(struct device *device)
+{
+	return to_ishtp_cl_device(device);
+}
+EXPORT_SYMBOL(ishtp_dev_to_cl_device);
+
+/**
  * ishtp_bus_new_client() - Create a new client
  * @dev:	ISHTP device instance
  *
@@ -807,6 +847,59 @@ int ishtp_use_dma_transfer(void)
 }
 
 /**
+ * ishtp_device() - Return device pointer
+ *
+ * This interface is used to return device pointer from ishtp_cl_device
+ * instance.
+ *
+ * Return: device *.
+ */
+struct device *ishtp_device(struct ishtp_cl_device *device)
+{
+	return &device->dev;
+}
+EXPORT_SYMBOL(ishtp_device);
+
+/**
+ * ishtp_get_pci_device() - Return PCI device dev pointer
+ * This interface is used to return PCI device pointer
+ * from ishtp_cl_device instance.
+ *
+ * Return: device *.
+ */
+struct device *ishtp_get_pci_device(struct ishtp_cl_device *device)
+{
+	return device->ishtp_dev->devc;
+}
+EXPORT_SYMBOL(ishtp_get_pci_device);
+
+/**
+ * ishtp_trace_callback() - Return trace callback
+ *
+ * This interface is used to return trace callback function pointer.
+ *
+ * Return: void *.
+ */
+void *ishtp_trace_callback(struct ishtp_cl_device *cl_device)
+{
+	return cl_device->ishtp_dev->print_log;
+}
+EXPORT_SYMBOL(ishtp_trace_callback);
+
+/**
+ * ish_hw_reset() - Call HW reset IPC callback
+ *
+ * This interface is used to reset HW in case of error.
+ *
+ * Return: value from IPC hw_reset callback
+ */
+int ish_hw_reset(struct ishtp_device *dev)
+{
+	return dev->ops->hw_reset(dev);
+}
+EXPORT_SYMBOL(ish_hw_reset);
+
+/**
  * ishtp_bus_register() - Function to register bus
  *
  * This register ishtp bus
diff --git a/drivers/hid/intel-ish-hid/ishtp/bus.h b/drivers/hid/intel-ish-hid/ishtp/bus.h
index 4cf7ad586c37..5bb85c932e4c 100644
--- a/drivers/hid/intel-ish-hid/ishtp/bus.h
+++ b/drivers/hid/intel-ish-hid/ishtp/bus.h
@@ -1,22 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * ISHTP bus definitions
  *
  * Copyright (c) 2014-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 #ifndef _LINUX_ISHTP_CL_BUS_H
 #define _LINUX_ISHTP_CL_BUS_H
 
 #include <linux/device.h>
 #include <linux/mod_devicetable.h>
+#include <linux/intel-ish-client-if.h>
 
 struct ishtp_cl;
 struct ishtp_cl_device;
@@ -52,25 +45,6 @@ struct ishtp_cl_device {
 	void (*event_cb)(struct ishtp_cl_device *device);
 };
 
-/**
- * struct ishtp_cl_device - ISHTP device handle
- * @driver:	driver instance on a bus
- * @name:	Name of the device for probe
- * @probe:	driver callback for device probe
- * @remove:	driver callback on device removal
- *
- * Client drivers defines to get probed/removed for ISHTP client device.
- */
-struct ishtp_cl_driver {
-	struct device_driver driver;
-	const char *name;
-	int (*probe)(struct ishtp_cl_device *dev);
-	int (*remove)(struct ishtp_cl_device *dev);
-	int (*reset)(struct ishtp_cl_device *dev);
-	const struct dev_pm_ops *pm;
-};
-
-
 int	ishtp_bus_new_client(struct ishtp_device *dev);
 void	ishtp_remove_all_clients(struct ishtp_device *dev);
 int	ishtp_cl_device_bind(struct ishtp_cl *cl);
@@ -98,22 +72,5 @@ void	ishtp_recv(struct ishtp_device *dev);
 void	ishtp_reset_handler(struct ishtp_device *dev);
 void	ishtp_reset_compl_handler(struct ishtp_device *dev);
 
-void	ishtp_put_device(struct ishtp_cl_device *);
-void	ishtp_get_device(struct ishtp_cl_device *);
-
-void	ishtp_set_drvdata(struct ishtp_cl_device *cl_device, void *data);
-void	*ishtp_get_drvdata(struct ishtp_cl_device *cl_device);
-
-int	__ishtp_cl_driver_register(struct ishtp_cl_driver *driver,
-				   struct module *owner);
-#define ishtp_cl_driver_register(driver)		\
-	__ishtp_cl_driver_register(driver, THIS_MODULE)
-void	ishtp_cl_driver_unregister(struct ishtp_cl_driver *driver);
-
-int	ishtp_register_event_cb(struct ishtp_cl_device *device,
-				void (*read_cb)(struct ishtp_cl_device *));
 int	ishtp_fw_cl_by_uuid(struct ishtp_device *dev, const guid_t *cuuid);
-struct	ishtp_fw_client *ishtp_fw_cl_get_client(struct ishtp_device *dev,
-						const guid_t *uuid);
-
 #endif /* _LINUX_ISHTP_CL_BUS_H */
diff --git a/drivers/hid/intel-ish-hid/ishtp/client-buffers.c b/drivers/hid/intel-ish-hid/ishtp/client-buffers.c
index 248651c35497..1b0a0cc605e7 100644
--- a/drivers/hid/intel-ish-hid/ishtp/client-buffers.c
+++ b/drivers/hid/intel-ish-hid/ishtp/client-buffers.c
@@ -1,17 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * ISHTP Ring Buffers
  *
  * Copyright (c) 2003-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
  */
 
 #include <linux/slab.h>
diff --git a/drivers/hid/intel-ish-hid/ishtp/client.c b/drivers/hid/intel-ish-hid/ishtp/client.c
index faeccdb1475b..1cc157126fce 100644
--- a/drivers/hid/intel-ish-hid/ishtp/client.c
+++ b/drivers/hid/intel-ish-hid/ishtp/client.c
@@ -1,17 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * ISHTP client logic
  *
  * Copyright (c) 2003-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
  */
 
 #include <linux/slab.h>
@@ -126,7 +117,7 @@ static void ishtp_cl_init(struct ishtp_cl *cl, struct ishtp_device *dev)
  *
  * Return: The allocated client instance or NULL on failure
  */
-struct ishtp_cl *ishtp_cl_allocate(struct ishtp_device *dev)
+struct ishtp_cl *ishtp_cl_allocate(struct ishtp_cl_device *cl_device)
 {
 	struct ishtp_cl *cl;
 
@@ -134,7 +125,7 @@ struct ishtp_cl *ishtp_cl_allocate(struct ishtp_device *dev)
 	if (!cl)
 		return NULL;
 
-	ishtp_cl_init(cl, dev);
+	ishtp_cl_init(cl, cl_device->ishtp_dev);
 	return cl;
 }
 EXPORT_SYMBOL(ishtp_cl_allocate);
@@ -168,9 +159,6 @@ EXPORT_SYMBOL(ishtp_cl_free);
 /**
  * ishtp_cl_link() - Reserve a host id and link the client instance
  * @cl: client device instance
- * @id: host client id to use. It can be ISHTP_HOST_CLIENT_ID_ANY if any
- *	id from the available can be used
- *
  *
  * This allocates a single bit in the hostmap. This function will make sure
  * that not many client sessions are opened at the same time. Once allocated
@@ -179,11 +167,11 @@ EXPORT_SYMBOL(ishtp_cl_free);
  *
  * Return: 0 or error code on failure
  */
-int ishtp_cl_link(struct ishtp_cl *cl, int id)
+int ishtp_cl_link(struct ishtp_cl *cl)
 {
 	struct ishtp_device *dev;
-	unsigned long	flags, flags_cl;
-	int	ret = 0;
+	unsigned long flags, flags_cl;
+	int id, ret = 0;
 
 	if (WARN_ON(!cl || !cl->dev))
 		return -EINVAL;
@@ -197,10 +185,7 @@ int ishtp_cl_link(struct ishtp_cl *cl, int id)
 		goto unlock_dev;
 	}
 
-	/* If Id is not assigned get one*/
-	if (id == ISHTP_HOST_CLIENT_ID_ANY)
-		id = find_first_zero_bit(dev->host_clients_map,
-			ISHTP_CLIENTS_MAX);
+	id = find_first_zero_bit(dev->host_clients_map, ISHTP_CLIENTS_MAX);
 
 	if (id >= ISHTP_CLIENTS_MAX) {
 		spin_unlock_irqrestore(&dev->device_lock, flags);
@@ -1069,3 +1054,45 @@ void recv_ishtp_cl_msg_dma(struct ishtp_device *dev, void *msg,
 eoi:
 	return;
 }
+
+void *ishtp_get_client_data(struct ishtp_cl *cl)
+{
+	return cl->client_data;
+}
+EXPORT_SYMBOL(ishtp_get_client_data);
+
+void ishtp_set_client_data(struct ishtp_cl *cl, void *data)
+{
+	cl->client_data = data;
+}
+EXPORT_SYMBOL(ishtp_set_client_data);
+
+struct ishtp_device *ishtp_get_ishtp_device(struct ishtp_cl *cl)
+{
+	return cl->dev;
+}
+EXPORT_SYMBOL(ishtp_get_ishtp_device);
+
+void ishtp_set_tx_ring_size(struct ishtp_cl *cl, int size)
+{
+	cl->tx_ring_size = size;
+}
+EXPORT_SYMBOL(ishtp_set_tx_ring_size);
+
+void ishtp_set_rx_ring_size(struct ishtp_cl *cl, int size)
+{
+	cl->rx_ring_size = size;
+}
+EXPORT_SYMBOL(ishtp_set_rx_ring_size);
+
+void ishtp_set_connection_state(struct ishtp_cl *cl, int state)
+{
+	cl->state = state;
+}
+EXPORT_SYMBOL(ishtp_set_connection_state);
+
+void ishtp_cl_set_fw_client_id(struct ishtp_cl *cl, int fw_client_id)
+{
+	cl->fw_client_id = fw_client_id;
+}
+EXPORT_SYMBOL(ishtp_cl_set_fw_client_id);
diff --git a/drivers/hid/intel-ish-hid/ishtp/client.h b/drivers/hid/intel-ish-hid/ishtp/client.h
index e0df3eb611e6..fc62dd1495da 100644
--- a/drivers/hid/intel-ish-hid/ishtp/client.h
+++ b/drivers/hid/intel-ish-hid/ishtp/client.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * ISHTP client logic
  *
  * Copyright (c) 2003-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
  */
 
 #ifndef _ISHTP_CLIENT_H_
@@ -19,15 +11,6 @@
 #include <linux/types.h>
 #include "ishtp-dev.h"
 
-/* Client state */
-enum cl_state {
-	ISHTP_CL_INITIALIZING = 0,
-	ISHTP_CL_CONNECTING,
-	ISHTP_CL_CONNECTED,
-	ISHTP_CL_DISCONNECTING,
-	ISHTP_CL_DISCONNECTED
-};
-
 /* Tx and Rx ring size */
 #define	CL_DEF_RX_RING_SIZE	2
 #define	CL_DEF_TX_RING_SIZE	2
@@ -169,19 +152,4 @@ static inline bool ishtp_cl_cmp_id(const struct ishtp_cl *cl1,
 		(cl1->fw_client_id == cl2->fw_client_id);
 }
 
-/* exported functions from ISHTP under client management scope */
-struct ishtp_cl	*ishtp_cl_allocate(struct ishtp_device *dev);
-void ishtp_cl_free(struct ishtp_cl *cl);
-int ishtp_cl_link(struct ishtp_cl *cl, int id);
-void ishtp_cl_unlink(struct ishtp_cl *cl);
-int ishtp_cl_disconnect(struct ishtp_cl *cl);
-int ishtp_cl_connect(struct ishtp_cl *cl);
-int ishtp_cl_send(struct ishtp_cl *cl, uint8_t *buf, size_t length);
-int ishtp_cl_flush_queues(struct ishtp_cl *cl);
-
-/* exported functions from ISHTP client buffer management scope */
-int ishtp_cl_io_rb_recycle(struct ishtp_cl_rb *rb);
-bool ishtp_cl_tx_empty(struct ishtp_cl *cl);
-struct ishtp_cl_rb *ishtp_cl_rx_get_rb(struct ishtp_cl *cl);
-
 #endif /* _ISHTP_CLIENT_H_ */
diff --git a/drivers/hid/intel-ish-hid/ishtp/dma-if.c b/drivers/hid/intel-ish-hid/ishtp/dma-if.c
index 2783f3666114..40554c8daca0 100644
--- a/drivers/hid/intel-ish-hid/ishtp/dma-if.c
+++ b/drivers/hid/intel-ish-hid/ishtp/dma-if.c
@@ -1,17 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * ISHTP DMA I/F functions
  *
  * Copyright (c) 2003-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
  */
 
 #include <linux/slab.h>
diff --git a/drivers/hid/intel-ish-hid/ishtp/hbm.c b/drivers/hid/intel-ish-hid/ishtp/hbm.c
index d0b847c86935..c6c9ac09dac3 100644
--- a/drivers/hid/intel-ish-hid/ishtp/hbm.c
+++ b/drivers/hid/intel-ish-hid/ishtp/hbm.c
@@ -1,17 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * ISHTP bus layer messages handling
  *
  * Copyright (c) 2003-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
  */
 
 #include <linux/export.h>
diff --git a/drivers/hid/intel-ish-hid/ishtp/hbm.h b/drivers/hid/intel-ish-hid/ishtp/hbm.h
index 7286e3600140..bb85985b1620 100644
--- a/drivers/hid/intel-ish-hid/ishtp/hbm.h
+++ b/drivers/hid/intel-ish-hid/ishtp/hbm.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * ISHTP bus layer messages handling
  *
  * Copyright (c) 2003-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 
 #ifndef _ISHTP_HBM_H_
diff --git a/drivers/hid/intel-ish-hid/ishtp/init.c b/drivers/hid/intel-ish-hid/ishtp/init.c
index d27e03526acd..02a00cc2dd11 100644
--- a/drivers/hid/intel-ish-hid/ishtp/init.c
+++ b/drivers/hid/intel-ish-hid/ishtp/init.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Initialization protocol for ISHTP driver
  *
  * Copyright (c) 2003-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 
 #include <linux/export.h>
diff --git a/drivers/hid/intel-ish-hid/ishtp/ishtp-dev.h b/drivers/hid/intel-ish-hid/ishtp/ishtp-dev.h
index e54ce1ef27dd..39e0e6c73adf 100644
--- a/drivers/hid/intel-ish-hid/ishtp/ishtp-dev.h
+++ b/drivers/hid/intel-ish-hid/ishtp/ishtp-dev.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Most ISHTP provider device and ISHTP logic declarations
  *
  * Copyright (c) 2003-2016, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
  */
 
 #ifndef _ISHTP_DEV_H_
@@ -79,32 +71,6 @@ struct ishtp_fw_client {
 	uint8_t client_id;
 };
 
-/**
- * struct ishtp_msg_data - ISHTP message data struct
- * @size:	Size of data in the *data
- * @data:	Pointer to data
- */
-struct ishtp_msg_data {
-	uint32_t size;
-	unsigned char *data;
-};
-
-/*
- * struct ishtp_cl_rb - request block structure
- * @list:	Link to list members
- * @cl:		ISHTP client instance
- * @buffer:	message header
- * @buf_idx:	Index into buffer
- * @read_time:	 unused at this time
- */
-struct ishtp_cl_rb {
-	struct list_head list;
-	struct ishtp_cl *cl;
-	struct ishtp_msg_data buffer;
-	unsigned long buf_idx;
-	unsigned long read_time;
-};
-
 /*
  * Control info for IPC messages ISHTP/IPC sending FIFO -
  * list with inline data buffer
@@ -264,11 +230,6 @@ static inline int ish_ipc_reset(struct ishtp_device *dev)
 	return dev->ops->ipc_reset(dev);
 }
 
-static inline int ish_hw_reset(struct ishtp_device *dev)
-{
-	return dev->ops->hw_reset(dev);
-}
-
 /* Exported function */
 void	ishtp_device_init(struct ishtp_device *dev);
 int	ishtp_start(struct ishtp_device *dev);
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index 840634e0f1e3..fa0cc0899827 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * User-space I/O driver support for HID subsystem
  * Copyright (c) 2012 David Herrmann
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/atomic.h>
@@ -632,7 +629,7 @@ static int uhid_char_open(struct inode *inode, struct file *file)
 	INIT_WORK(&uhid->worker, uhid_device_add_worker);
 
 	file->private_data = uhid;
-	nonseekable_open(inode, file);
+	stream_open(inode, file);
 
 	return 0;
 }
diff --git a/drivers/hid/usbhid/Kconfig b/drivers/hid/usbhid/Kconfig
index e50d8fe4d36c..b5f3a3c4149e 100644
--- a/drivers/hid/usbhid/Kconfig
+++ b/drivers/hid/usbhid/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 menu "USB HID support"
 	depends on USB
 
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 11103efebbaa..c7bc9db5b192 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  USB HID support for Linux
  *
@@ -9,10 +10,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
  */
 
 #include <linux/module.h>
diff --git a/drivers/hid/usbhid/hid-pidff.c b/drivers/hid/usbhid/hid-pidff.c
index 08174d341f4a..fddac7c72f64 100644
--- a/drivers/hid/usbhid/hid-pidff.c
+++ b/drivers/hid/usbhid/hid-pidff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Force feedback driver for USB HID PID compliant devices
  *
@@ -5,19 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 /* #define DEBUG */
diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index a746017fac17..55b72573066b 100644
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -1,25 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright (c) 2001 Paul Stewart
  *  Copyright (c) 2001 Vojtech Pavlik
  *
  *  HID char devices, giving access to raw HID device events.
- *
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  * Should you need to contact me, the author, you can do so either by
  * e-mail - mail your message to Paul Stewart <stewart@wetlogic.net>
diff --git a/drivers/hid/usbhid/usbhid.h b/drivers/hid/usbhid/usbhid.h
index da9c61d54be6..8620408bd7af 100644
--- a/drivers/hid/usbhid/usbhid.h
+++ b/drivers/hid/usbhid/usbhid.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __USBHID_H
 #define __USBHID_H
 
@@ -8,20 +9,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
  */
 
 #include <linux/types.h>
diff --git a/drivers/hid/usbhid/usbkbd.c b/drivers/hid/usbhid/usbkbd.c
index ed01dc425d29..d5b7a696a68c 100644
--- a/drivers/hid/usbhid/usbkbd.c
+++ b/drivers/hid/usbhid/usbkbd.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright (c) 1999-2001 Vojtech Pavlik
  *
@@ -5,19 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  * Should you need to contact me, the author, you can do so either by
  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
diff --git a/drivers/hid/usbhid/usbmouse.c b/drivers/hid/usbhid/usbmouse.c
index 589ad7c15a58..073127e65ac1 100644
--- a/drivers/hid/usbhid/usbmouse.c
+++ b/drivers/hid/usbhid/usbmouse.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright (c) 1999-2001 Vojtech Pavlik
  *
@@ -5,19 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  * Should you need to contact me, the author, you can do so either by
  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
diff --git a/drivers/hid/wacom.h b/drivers/hid/wacom.h
index 3c37c3cbf6f1..4a7f8d363220 100644
--- a/drivers/hid/wacom.h
+++ b/drivers/hid/wacom.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * drivers/input/tablet/wacom.h
  *
@@ -78,10 +79,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 #ifndef WACOM_H
 #define WACOM_H
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index a8633b1437b2..83dd3a2a7316 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * drivers/input/tablet/wacom_sys.c
  *
@@ -5,10 +6,6 @@
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include "wacom_wac.h"
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index 747730d32ab6..43f6da357165 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -1,15 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * drivers/input/tablet/wacom_wac.c
  *
  *  USB Wacom tablet support - Wacom specific code
- *
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include "wacom_wac.h"
@@ -1236,13 +1232,13 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
 		/* Add back in missing bits of ID for non-USI pens */
 		wacom->id[0] |= (wacom->serial[0] >> 32) & 0xFFFFF;
 	}
-	wacom->tool[0]   = wacom_intuos_get_tool_type(wacom_intuos_id_mangle(wacom->id[0]));
 
 	for (i = 0; i < pen_frames; i++) {
 		unsigned char *frame = &data[i*pen_frame_len + 1];
 		bool valid = frame[0] & 0x80;
 		bool prox = frame[0] & 0x40;
 		bool range = frame[0] & 0x20;
+		bool invert = frame[0] & 0x10;
 
 		if (!valid)
 			continue;
@@ -1251,9 +1247,24 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
 			wacom->shared->stylus_in_proximity = false;
 			wacom_exit_report(wacom);
 			input_sync(pen_input);
+
+			wacom->tool[0] = 0;
+			wacom->id[0] = 0;
+			wacom->serial[0] = 0;
 			return;
 		}
+
 		if (range) {
+			if (!wacom->tool[0]) { /* first in range */
+				/* Going into range select tool */
+				if (invert)
+					wacom->tool[0] = BTN_TOOL_RUBBER;
+				else if (wacom->id[0])
+					wacom->tool[0] = wacom_intuos_get_tool_type(wacom->id[0]);
+				else
+					wacom->tool[0] = BTN_TOOL_PEN;
+			}
+
 			input_report_abs(pen_input, ABS_X, get_unaligned_le16(&frame[1]));
 			input_report_abs(pen_input, ABS_Y, get_unaligned_le16(&frame[3]));
 
@@ -1275,23 +1286,26 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
 						 get_unaligned_le16(&frame[11]));
 			}
 		}
-		input_report_abs(pen_input, ABS_PRESSURE, get_unaligned_le16(&frame[5]));
-		if (wacom->features.type == INTUOSP2_BT) {
-			input_report_abs(pen_input, ABS_DISTANCE,
-					 range ? frame[13] : wacom->features.distance_max);
-		} else {
-			input_report_abs(pen_input, ABS_DISTANCE,
-					 range ? frame[7] : wacom->features.distance_max);
-		}
 
-		input_report_key(pen_input, BTN_TOUCH, frame[0] & 0x01);
-		input_report_key(pen_input, BTN_STYLUS, frame[0] & 0x02);
-		input_report_key(pen_input, BTN_STYLUS2, frame[0] & 0x04);
+		if (wacom->tool[0]) {
+			input_report_abs(pen_input, ABS_PRESSURE, get_unaligned_le16(&frame[5]));
+			if (wacom->features.type == INTUOSP2_BT) {
+				input_report_abs(pen_input, ABS_DISTANCE,
+						 range ? frame[13] : wacom->features.distance_max);
+			} else {
+				input_report_abs(pen_input, ABS_DISTANCE,
+						 range ? frame[7] : wacom->features.distance_max);
+			}
+
+			input_report_key(pen_input, BTN_TOUCH, frame[0] & 0x09);
+			input_report_key(pen_input, BTN_STYLUS, frame[0] & 0x02);
+			input_report_key(pen_input, BTN_STYLUS2, frame[0] & 0x04);
 
-		input_report_key(pen_input, wacom->tool[0], prox);
-		input_event(pen_input, EV_MSC, MSC_SERIAL, wacom->serial[0]);
-		input_report_abs(pen_input, ABS_MISC,
-				 wacom_intuos_id_mangle(wacom->id[0])); /* report tool id */
+			input_report_key(pen_input, wacom->tool[0], prox);
+			input_event(pen_input, EV_MSC, MSC_SERIAL, wacom->serial[0]);
+			input_report_abs(pen_input, ABS_MISC,
+					 wacom_intuos_id_mangle(wacom->id[0])); /* report tool id */
+		}
 
 		wacom->shared->stylus_in_proximity = prox;
 
@@ -1353,11 +1367,17 @@ static void wacom_intuos_pro2_bt_touch(struct wacom_wac *wacom)
 		if (wacom->num_contacts_left <= 0) {
 			wacom->num_contacts_left = 0;
 			wacom->shared->touch_down = wacom_wac_finger_count_touches(wacom);
+			input_sync(touch_input);
 		}
 	}
 
-	input_report_switch(touch_input, SW_MUTE_DEVICE, !(data[281] >> 7));
-	input_sync(touch_input);
+	if (wacom->num_contacts_left == 0) {
+		// Be careful that we don't accidentally call input_sync with
+		// only a partial set of fingers of processed
+		input_report_switch(touch_input, SW_MUTE_DEVICE, !(data[281] >> 7));
+		input_sync(touch_input);
+	}
+
 }
 
 static void wacom_intuos_pro2_bt_pad(struct wacom_wac *wacom)
@@ -1365,7 +1385,7 @@ static void wacom_intuos_pro2_bt_pad(struct wacom_wac *wacom)
 	struct input_dev *pad_input = wacom->pad_input;
 	unsigned char *data = wacom->data;
 
-	int buttons = (data[282] << 1) | ((data[281] >> 6) & 0x01);
+	int buttons = data[282] | ((data[281] & 0x40) << 2);
 	int ring = data[285] & 0x7F;
 	bool ringstatus = data[285] & 0x80;
 	bool prox = buttons || ringstatus;
@@ -3814,7 +3834,7 @@ static void wacom_24hd_update_leds(struct wacom *wacom, int mask, int group)
 static bool wacom_is_led_toggled(struct wacom *wacom, int button_count,
 				 int mask, int group)
 {
-	int button_per_group;
+	int group_button;
 
 	/*
 	 * 21UX2 has LED group 1 to the left and LED group 0
@@ -3824,9 +3844,12 @@ static bool wacom_is_led_toggled(struct wacom *wacom, int button_count,
 	if (wacom->wacom_wac.features.type == WACOM_21UX2)
 		group = 1 - group;
 
-	button_per_group = button_count/wacom->led.count;
+	group_button = group * (button_count/wacom->led.count);
+
+	if (wacom->wacom_wac.features.type == INTUOSP2_BT)
+		group_button = 8;
 
-	return mask & (1 << (group * button_per_group));
+	return mask & (1 << group_button);
 }
 
 static void wacom_update_led(struct wacom *wacom, int button_count, int mask,
diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h
index 295fd3718caa..cac68d1c20c5 100644
--- a/drivers/hid/wacom_wac.h
+++ b/drivers/hid/wacom_wac.h
@@ -1,10 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * drivers/input/tablet/wacom_wac.h
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 #ifndef WACOM_WAC_H
 #define WACOM_WAC_H