Merge tag 'usb-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB/PHY updates from Greg KH:
 "Here is the big set of USB and PHY driver updates for 4.15-rc1.

  There is the usual amount of gadget and xhci driver updates, along
  with phy and chipidea enhancements. There's also a lot of SPDX tags
  and license boilerplate cleanups as well, which provide some churn in
  the diffstat.

  Other major thing is the typec code that moved out of staging and into
  the "real" part of the drivers/usb/ tree, which was nice to see
  happen.

  All of these have been in linux-next with no reported issues for a
  while"

* tag 'usb-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (263 commits)
  usb: gadget: f_fs: Fix use-after-free in ffs_free_inst
  USB: usbfs: compute urb->actual_length for isochronous
  usb: core: message: remember to reset 'ret' to 0 when necessary
  USB: typec: Remove remaining redundant license text
  USB: typec: add SPDX identifiers to some files
  USB: renesas_usbhs: rcar?.h: add SPDX tags
  USB: chipidea: ci_hdrc_tegra.c: add SPDX line
  USB: host: xhci-debugfs: add SPDX lines
  USB: add SPDX identifiers to all remaining Makefiles
  usb: host: isp1362-hcd: remove a couple of redundant assignments
  USB: adutux: remove redundant variable minor
  usb: core: add a new usb_get_ptm_status() helper
  usb: core: add a 'type' parameter to usb_get_status()
  usb: core: introduce a new usb_get_std_status() helper
  usb: core: rename usb_get_status() 'type' argument to 'recip'
  usb: core: add Status Type definitions
  USB: gadget: Remove redundant license text
  USB: gadget: function: Remove redundant license text
  USB: gadget: udc: Remove redundant license text
  USB: gadget: legacy: Remove redundant license text
  ...

1 files changed, 459 insertions, 0 deletions

diff --git a/drivers/phy/broadcom/phy-brcm-usb.c b/drivers/phy/broadcom/phy-brcm-usb.c
new file mode 100644
index 000000000000..195b98139e5f
--- /dev/null
+++ b/drivers/phy/broadcom/phy-brcm-usb.c
@@ -0,0 +1,459 @@
+/*
+ * phy-brcm-usb.c - Broadcom USB Phy Driver
+ *
+ * Copyright (C) 2015-2017 Broadcom
+ *
+ * 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/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/soc/brcmstb/brcmstb.h>
+#include <dt-bindings/phy/phy.h>
+
+#include "phy-brcm-usb-init.h"
+
+static DEFINE_MUTEX(sysfs_lock);
+
+enum brcm_usb_phy_id {
+	BRCM_USB_PHY_2_0 = 0,
+	BRCM_USB_PHY_3_0,
+	BRCM_USB_PHY_ID_MAX
+};
+
+struct value_to_name_map {
+	int value;
+	const char *name;
+};
+
+static struct value_to_name_map brcm_dr_mode_to_name[] = {
+	{ USB_CTLR_MODE_HOST, "host" },
+	{ USB_CTLR_MODE_DEVICE, "peripheral" },
+	{ USB_CTLR_MODE_DRD, "drd" },
+	{ USB_CTLR_MODE_TYPEC_PD, "typec-pd" }
+};
+
+static struct value_to_name_map brcm_dual_mode_to_name[] = {
+	{ 0, "host" },
+	{ 1, "device" },
+	{ 2, "auto" },
+};
+
+struct brcm_usb_phy {
+	struct phy *phy;
+	unsigned int id;
+	bool inited;
+};
+
+struct brcm_usb_phy_data {
+	struct  brcm_usb_init_params ini;
+	bool			has_eohci;
+	bool			has_xhci;
+	struct clk		*usb_20_clk;
+	struct clk		*usb_30_clk;
+	struct mutex		mutex;	/* serialize phy init */
+	int			init_count;
+	struct brcm_usb_phy	phys[BRCM_USB_PHY_ID_MAX];
+};
+
+static int brcm_usb_phy_init(struct phy *gphy)
+{
+	struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
+	struct brcm_usb_phy_data *priv =
+		container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);
+
+	/*
+	 * Use a lock to make sure a second caller waits until
+	 * the base phy is inited before using it.
+	 */
+	mutex_lock(&priv->mutex);
+	if (priv->init_count++ == 0) {
+		clk_enable(priv->usb_20_clk);
+		clk_enable(priv->usb_30_clk);
+		brcm_usb_init_common(&priv->ini);
+	}
+	mutex_unlock(&priv->mutex);
+	if (phy->id == BRCM_USB_PHY_2_0)
+		brcm_usb_init_eohci(&priv->ini);
+	else if (phy->id == BRCM_USB_PHY_3_0)
+		brcm_usb_init_xhci(&priv->ini);
+	phy->inited = true;
+	dev_dbg(&gphy->dev, "INIT, id: %d, total: %d\n", phy->id,
+		priv->init_count);
+
+	return 0;
+}
+
+static int brcm_usb_phy_exit(struct phy *gphy)
+{
+	struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
+	struct brcm_usb_phy_data *priv =
+		container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);
+
+	dev_dbg(&gphy->dev, "EXIT\n");
+	if (phy->id == BRCM_USB_PHY_2_0)
+		brcm_usb_uninit_eohci(&priv->ini);
+	if (phy->id == BRCM_USB_PHY_3_0)
+		brcm_usb_uninit_xhci(&priv->ini);
+
+	/* If both xhci and eohci are gone, reset everything else */
+	mutex_lock(&priv->mutex);
+	if (--priv->init_count == 0) {
+		brcm_usb_uninit_common(&priv->ini);
+		clk_disable(priv->usb_20_clk);
+		clk_disable(priv->usb_30_clk);
+	}
+	mutex_unlock(&priv->mutex);
+	phy->inited = false;
+	return 0;
+}
+
+static struct phy_ops brcm_usb_phy_ops = {
+	.init		= brcm_usb_phy_init,
+	.exit		= brcm_usb_phy_exit,
+	.owner		= THIS_MODULE,
+};
+
+static struct phy *brcm_usb_phy_xlate(struct device *dev,
+				      struct of_phandle_args *args)
+{
+	struct brcm_usb_phy_data *data = dev_get_drvdata(dev);
+
+	/*
+	 * values 0 and 1 are for backward compatibility with
+	 * device tree nodes from older bootloaders.
+	 */
+	switch (args->args[0]) {
+	case 0:
+	case PHY_TYPE_USB2:
+		if (data->phys[BRCM_USB_PHY_2_0].phy)
+			return data->phys[BRCM_USB_PHY_2_0].phy;
+		dev_warn(dev, "Error, 2.0 Phy not found\n");
+		break;
+	case 1:
+	case PHY_TYPE_USB3:
+		if (data->phys[BRCM_USB_PHY_3_0].phy)
+			return data->phys[BRCM_USB_PHY_3_0].phy;
+		dev_warn(dev, "Error, 3.0 Phy not found\n");
+		break;
+	}
+	return ERR_PTR(-ENODEV);
+}
+
+static int name_to_value(struct value_to_name_map *table, int count,
+			 const char *name, int *value)
+{
+	int x;
+
+	*value = 0;
+	for (x = 0; x < count; x++) {
+		if (sysfs_streq(name, table[x].name)) {
+			*value = x;
+			return 0;
+		}
+	}
+	return -EINVAL;
+}
+
+static const char *value_to_name(struct value_to_name_map *table, int count,
+				 int value)
+{
+	if (value >= count)
+		return "unknown";
+	return table[value].name;
+}
+
+static ssize_t dr_mode_show(struct device *dev,
+			    struct device_attribute *attr,
+			    char *buf)
+{
+	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%s\n",
+		value_to_name(&brcm_dr_mode_to_name[0],
+			      ARRAY_SIZE(brcm_dr_mode_to_name),
+			      priv->ini.mode));
+}
+static DEVICE_ATTR_RO(dr_mode);
+
+static ssize_t dual_select_store(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf, size_t len)
+{
+	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
+	int value;
+	int res;
+
+	mutex_lock(&sysfs_lock);
+	res = name_to_value(&brcm_dual_mode_to_name[0],
+			    ARRAY_SIZE(brcm_dual_mode_to_name), buf, &value);
+	if (!res) {
+		brcm_usb_init_set_dual_select(&priv->ini, value);
+		res = len;
+	}
+	mutex_unlock(&sysfs_lock);
+	return res;
+}
+
+static ssize_t dual_select_show(struct device *dev,
+				struct device_attribute *attr,
+				char *buf)
+{
+	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
+	int value;
+
+	mutex_lock(&sysfs_lock);
+	value = brcm_usb_init_get_dual_select(&priv->ini);
+	mutex_unlock(&sysfs_lock);
+	return sprintf(buf, "%s\n",
+		value_to_name(&brcm_dual_mode_to_name[0],
+			      ARRAY_SIZE(brcm_dual_mode_to_name),
+			      value));
+}
+static DEVICE_ATTR_RW(dual_select);
+
+static struct attribute *brcm_usb_phy_attrs[] = {
+	&dev_attr_dr_mode.attr,
+	&dev_attr_dual_select.attr,
+	NULL
+};
+
+static const struct attribute_group brcm_usb_phy_group = {
+	.attrs = brcm_usb_phy_attrs,
+};
+
+static int brcm_usb_phy_dvr_init(struct device *dev,
+				 struct brcm_usb_phy_data *priv,
+				 struct device_node *dn)
+{
+	struct phy *gphy;
+	int err;
+
+	priv->usb_20_clk = of_clk_get_by_name(dn, "sw_usb");
+	if (IS_ERR(priv->usb_20_clk)) {
+		dev_info(dev, "Clock not found in Device Tree\n");
+		priv->usb_20_clk = NULL;
+	}
+	err = clk_prepare_enable(priv->usb_20_clk);
+	if (err)
+		return err;
+
+	if (priv->has_eohci) {
+		gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
+		if (IS_ERR(gphy)) {
+			dev_err(dev, "failed to create EHCI/OHCI PHY\n");
+			return PTR_ERR(gphy);
+		}
+		priv->phys[BRCM_USB_PHY_2_0].phy = gphy;
+		priv->phys[BRCM_USB_PHY_2_0].id = BRCM_USB_PHY_2_0;
+		phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_2_0]);
+	}
+
+	if (priv->has_xhci) {
+		gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
+		if (IS_ERR(gphy)) {
+			dev_err(dev, "failed to create XHCI PHY\n");
+			return PTR_ERR(gphy);
+		}
+		priv->phys[BRCM_USB_PHY_3_0].phy = gphy;
+		priv->phys[BRCM_USB_PHY_3_0].id = BRCM_USB_PHY_3_0;
+		phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_3_0]);
+
+		priv->usb_30_clk = of_clk_get_by_name(dn, "sw_usb3");
+		if (IS_ERR(priv->usb_30_clk)) {
+			dev_info(dev,
+				 "USB3.0 clock not found in Device Tree\n");
+			priv->usb_30_clk = NULL;
+		}
+		err = clk_prepare_enable(priv->usb_30_clk);
+		if (err)
+			return err;
+	}
+	return 0;
+}
+
+static int brcm_usb_phy_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct device *dev = &pdev->dev;
+	struct brcm_usb_phy_data *priv;
+	struct phy_provider *phy_provider;
+	struct device_node *dn = pdev->dev.of_node;
+	int err;
+	const char *mode;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, priv);
+
+	priv->ini.family_id = brcmstb_get_family_id();
+	priv->ini.product_id = brcmstb_get_product_id();
+	brcm_usb_set_family_map(&priv->ini);
+	dev_dbg(dev, "Best mapping table is for %s\n",
+		priv->ini.family_name);
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(dev, "can't get USB_CTRL base address\n");
+		return -EINVAL;
+	}
+	priv->ini.ctrl_regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(priv->ini.ctrl_regs)) {
+		dev_err(dev, "can't map CTRL register space\n");
+		return -EINVAL;
+	}
+
+	/* The XHCI EC registers are optional */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		priv->ini.xhci_ec_regs =
+			devm_ioremap_resource(dev, res);
+		if (IS_ERR(priv->ini.xhci_ec_regs)) {
+			dev_err(dev, "can't map XHCI EC register space\n");
+			return -EINVAL;
+		}
+	}
+
+	of_property_read_u32(dn, "brcm,ipp", &priv->ini.ipp);
+	of_property_read_u32(dn, "brcm,ioc", &priv->ini.ioc);
+
+	priv->ini.mode = USB_CTLR_MODE_HOST;
+	err = of_property_read_string(dn, "dr_mode", &mode);
+	if (err == 0) {
+		name_to_value(&brcm_dr_mode_to_name[0],
+			      ARRAY_SIZE(brcm_dr_mode_to_name),
+			mode, &priv->ini.mode);
+	}
+	if (of_property_read_bool(dn, "brcm,has_xhci"))
+		priv->has_xhci = true;
+	if (of_property_read_bool(dn, "brcm,has_eohci"))
+		priv->has_eohci = true;
+
+	err = brcm_usb_phy_dvr_init(dev, priv, dn);
+	if (err)
+		return err;
+
+	mutex_init(&priv->mutex);
+
+	/* make sure invert settings are correct */
+	brcm_usb_init_ipp(&priv->ini);
+
+	/*
+	 * Create sysfs entries for mode.
+	 * Remove "dual_select" attribute if not in dual mode
+	 */
+	if (priv->ini.mode != USB_CTLR_MODE_DRD)
+		brcm_usb_phy_attrs[1] = NULL;
+	err = sysfs_create_group(&dev->kobj, &brcm_usb_phy_group);
+	if (err)
+		dev_warn(dev, "Error creating sysfs attributes\n");
+
+	/* start with everything off */
+	if (priv->has_xhci)
+		brcm_usb_uninit_xhci(&priv->ini);
+	if (priv->has_eohci)
+		brcm_usb_uninit_eohci(&priv->ini);
+	brcm_usb_uninit_common(&priv->ini);
+	clk_disable(priv->usb_20_clk);
+	clk_disable(priv->usb_30_clk);
+
+	phy_provider = devm_of_phy_provider_register(dev, brcm_usb_phy_xlate);
+	if (IS_ERR(phy_provider))
+		return PTR_ERR(phy_provider);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int brcm_usb_phy_suspend(struct device *dev)
+{
+	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
+
+	if (priv->init_count) {
+		clk_disable(priv->usb_20_clk);
+		clk_disable(priv->usb_30_clk);
+	}
+	return 0;
+}
+
+static int brcm_usb_phy_resume(struct device *dev)
+{
+	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
+
+	clk_enable(priv->usb_20_clk);
+	clk_enable(priv->usb_30_clk);
+	brcm_usb_init_ipp(&priv->ini);
+
+	/*
+	 * Initialize anything that was previously initialized.
+	 * Uninitialize anything that wasn't previously initialized.
+	 */
+	if (priv->init_count) {
+		brcm_usb_init_common(&priv->ini);
+		if (priv->phys[BRCM_USB_PHY_2_0].inited) {
+			brcm_usb_init_eohci(&priv->ini);
+		} else if (priv->has_eohci) {
+			brcm_usb_uninit_eohci(&priv->ini);
+			clk_disable(priv->usb_20_clk);
+		}
+		if (priv->phys[BRCM_USB_PHY_3_0].inited) {
+			brcm_usb_init_xhci(&priv->ini);
+		} else if (priv->has_xhci) {
+			brcm_usb_uninit_xhci(&priv->ini);
+			clk_disable(priv->usb_30_clk);
+		}
+	} else {
+		if (priv->has_xhci)
+			brcm_usb_uninit_xhci(&priv->ini);
+		if (priv->has_eohci)
+			brcm_usb_uninit_eohci(&priv->ini);
+		brcm_usb_uninit_common(&priv->ini);
+		clk_disable(priv->usb_20_clk);
+		clk_disable(priv->usb_30_clk);
+	}
+
+	return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops brcm_usb_phy_pm_ops = {
+	SET_LATE_SYSTEM_SLEEP_PM_OPS(brcm_usb_phy_suspend, brcm_usb_phy_resume)
+};
+
+static const struct of_device_id brcm_usb_dt_ids[] = {
+	{ .compatible = "brcm,brcmstb-usb-phy" },
+	{ /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, brcm_usb_dt_ids);
+
+static struct platform_driver brcm_usb_driver = {
+	.probe		= brcm_usb_phy_probe,
+	.driver		= {
+		.name	= "brcmstb-usb-phy",
+		.owner	= THIS_MODULE,
+		.pm = &brcm_usb_phy_pm_ops,
+		.of_match_table = brcm_usb_dt_ids,
+	},
+};
+
+module_platform_driver(brcm_usb_driver);
+
+MODULE_ALIAS("platform:brcmstb-usb-phy");
+MODULE_AUTHOR("Al Cooper <acooper@broadcom.com>");
+MODULE_DESCRIPTION("BRCM USB PHY driver");
+MODULE_LICENSE("GPL v2");