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Diffstat (limited to 'drivers/hid/hid-maltron.c')
-rw-r--r--drivers/hid/hid-maltron.c165
1 files changed, 165 insertions, 0 deletions
diff --git a/drivers/hid/hid-maltron.c b/drivers/hid/hid-maltron.c
new file mode 100644
index 000000000000..dcd6db6a646e
--- /dev/null
+++ b/drivers/hid/hid-maltron.c
@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * HID driver for Maltron L90
+ *
+ * Copyright (c) 1999 Andreas Gal
+ * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
+ * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
+ * Copyright (c) 2008 Jiri Slaby
+ * Copyright (c) 2012 David Dillow <dave@thedillows.org>
+ * Copyright (c) 2006-2013 Jiri Kosina
+ * Copyright (c) 2013 Colin Leitner <colin.leitner@gmail.com>
+ * Copyright (c) 2014-2016 Frank Praznik <frank.praznik@gmail.com>
+ * Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
+ * Copyright (c) 2016 Yuxuan Shui <yshuiv7@gmail.com>
+ * Copyright (c) 2018 William Whistler <wtbw@wtbw.co.uk>
+ */
+
+#include <linux/device.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+/* The original buggy USB descriptor */
+static u8 maltron_rdesc_o[] = {
+ 0x05, 0x01, /* Usage Page (Generic Desktop Ctrls) */
+ 0x09, 0x80, /* Usage (Sys Control) */
+ 0xA1, 0x01, /* Collection (Application) */
+ 0x85, 0x02, /* Report ID (2) */
+ 0x75, 0x01, /* Report Size (1) */
+ 0x95, 0x01, /* Report Count (1) */
+ 0x15, 0x00, /* Logical Minimum (0) */
+ 0x25, 0x01, /* Logical Maximum (1) */
+ 0x09, 0x82, /* Usage (Sys Sleep) */
+ 0x81, 0x06, /* Input (Data,Var,Rel) */
+ 0x09, 0x82, /* Usage (Sys Sleep) */
+ 0x81, 0x06, /* Input (Data,Var,Rel) */
+ 0x09, 0x83, /* Usage (Sys Wake Up) */
+ 0x81, 0x06, /* Input (Data,Var,Rel) */
+ 0x75, 0x05, /* Report Size (5) */
+ 0x81, 0x01, /* Input (Const,Array,Abs) */
+ 0xC0, /* End Collection */
+ 0x05, 0x0C, /* Usage Page (Consumer) */
+ 0x09, 0x01, /* Usage (Consumer Control) */
+ 0xA1, 0x01, /* Collection (Application) */
+ 0x85, 0x03, /* Report ID (3) */
+ 0x95, 0x01, /* Report Count (1) */
+ 0x75, 0x10, /* Report Size (16) */
+ 0x19, 0x00, /* Usage Minimum (Unassigned) */
+ 0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */
+ 0x81, 0x00, /* Input (Data,Array,Abs) */
+ 0xC0, /* End Collection */
+ 0x06, 0x7F, 0xFF, /* Usage Page (Vendor Defined 0xFF7F) */
+ 0x09, 0x01, /* Usage (0x01) */
+ 0xA1, 0x01, /* Collection (Application) */
+ 0x85, 0x04, /* Report ID (4) */
+ 0x95, 0x01, /* Report Count (1) */
+ 0x75, 0x10, /* Report Size (16) */
+ 0x19, 0x00, /* Usage Minimum (0x00) */
+ 0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */
+ 0x81, 0x00, /* Input (Data,Array,Abs) */
+ 0x75, 0x02, /* Report Size (2) */
+ 0x25, 0x02, /* Logical Maximum (2) */
+ 0x09, 0x90, /* Usage (0x90) */
+ 0xB1, 0x02, /* Feature (Data,Var,Abs) */
+ 0x75, 0x06, /* Report Size (6) */
+ 0xB1, 0x01, /* Feature (Const,Array,Abs) */
+ 0x75, 0x01, /* Report Size (1) */
+ 0x25, 0x01, /* Logical Maximum (1) */
+ 0x05, 0x08, /* Usage Page (LEDs) */
+ 0x09, 0x2A, /* Usage (On-Line) */
+ 0x91, 0x02, /* Output (Data,Var,Abs) */
+ 0x09, 0x4B, /* Usage (Generic Indicator) */
+ 0x91, 0x02, /* Output (Data,Var,Abs) */
+ 0x75, 0x06, /* Report Size (6) */
+ 0x95, 0x01, /* Report Count (1) */
+ 0x91, 0x01, /* Output (Const,Array,Abs) */
+ 0xC0 /* End Collection */
+};
+
+/* The patched descriptor, allowing media key events to be accepted as valid */
+static u8 maltron_rdesc[] = {
+ 0x05, 0x01, /* Usage Page (Generic Desktop Ctrls) */
+ 0x09, 0x80, /* Usage (Sys Control) */
+ 0xA1, 0x01, /* Collection (Application) */
+ 0x85, 0x02, /* Report ID (2) */
+ 0x75, 0x01, /* Report Size (1) */
+ 0x95, 0x01, /* Report Count (1) */
+ 0x15, 0x00, /* Logical Minimum (0) */
+ 0x25, 0x01, /* Logical Maximum (1) */
+ 0x09, 0x82, /* Usage (Sys Sleep) */
+ 0x81, 0x06, /* Input (Data,Var,Rel) */
+ 0x09, 0x82, /* Usage (Sys Sleep) */
+ 0x81, 0x06, /* Input (Data,Var,Rel) */
+ 0x09, 0x83, /* Usage (Sys Wake Up) */
+ 0x81, 0x06, /* Input (Data,Var,Rel) */
+ 0x75, 0x05, /* Report Size (5) */
+ 0x81, 0x01, /* Input (Const,Array,Abs) */
+ 0xC0, /* End Collection */
+ 0x05, 0x0C, /* Usage Page (Consumer) */
+ 0x09, 0x01, /* Usage (Consumer Control) */
+ 0xA1, 0x01, /* Collection (Application) */
+ 0x85, 0x03, /* Report ID (3) */
+ 0x15, 0x00, /* Logical Minimum (0) - changed */
+ 0x26, 0xFF, 0x7F, /* Logical Maximum (32767) - changed */
+ 0x95, 0x01, /* Report Count (1) */
+ 0x75, 0x10, /* Report Size (16) */
+ 0x19, 0x00, /* Usage Minimum (Unassigned) */
+ 0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */
+ 0x81, 0x00, /* Input (Data,Array,Abs) */
+ 0xC0, /* End Collection */
+ 0x06, 0x7F, 0xFF, /* Usage Page (Vendor Defined 0xFF7F) */
+ 0x09, 0x01, /* Usage (0x01) */
+ 0xA1, 0x01, /* Collection (Application) */
+ 0x85, 0x04, /* Report ID (4) */
+ 0x95, 0x01, /* Report Count (1) */
+ 0x75, 0x10, /* Report Size (16) */
+ 0x19, 0x00, /* Usage Minimum (0x00) */
+ 0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */
+ 0x81, 0x00, /* Input (Data,Array,Abs) */
+ 0x75, 0x02, /* Report Size (2) */
+ 0x25, 0x02, /* Logical Maximum (2) */
+ 0x09, 0x90, /* Usage (0x90) */
+ 0xB1, 0x02, /* Feature (Data,Var,Abs) */
+ 0x75, 0x06, /* Report Size (6) */
+ 0xB1, 0x01, /* Feature (Const,Array,Abs) */
+ 0x75, 0x01, /* Report Size (1) */
+ 0x25, 0x01, /* Logical Maximum (1) */
+ 0x05, 0x08, /* Usage Page (LEDs) */
+ 0x09, 0x2A, /* Usage (On-Line) */
+ 0x91, 0x02, /* Output (Data,Var,Abs) */
+ 0x09, 0x4B, /* Usage (Generic Indicator) */
+ 0x91, 0x02, /* Output (Data,Var,Abs) */
+ 0x75, 0x06, /* Report Size (6) */
+ 0x95, 0x01, /* Report Count (1) */
+ 0x91, 0x01, /* Output (Const,Array,Abs) */
+ 0xC0 /* End Collection */
+};
+
+static __u8 *maltron_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int *rsize)
+{
+ if (*rsize == sizeof(maltron_rdesc_o) &&
+ !memcmp(maltron_rdesc_o, rdesc, sizeof(maltron_rdesc_o))) {
+ hid_info(hdev, "Replacing Maltron L90 keyboard report descriptor\n");
+ *rsize = sizeof(maltron_rdesc);
+ return maltron_rdesc;
+ }
+ return rdesc;
+}
+
+static const struct hid_device_id maltron_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_MALTRON_KB)},
+ { }
+};
+MODULE_DEVICE_TABLE(hid, maltron_devices);
+
+static struct hid_driver maltron_driver = {
+ .name = "maltron",
+ .id_table = maltron_devices,
+ .report_fixup = maltron_report_fixup
+};
+module_hid_driver(maltron_driver);
+
+MODULE_LICENSE("GPL");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.