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-rw-r--r--drivers/phy/Kconfig54
-rw-r--r--drivers/phy/Makefile9
-rw-r--r--drivers/phy/phy-core.c698
-rw-r--r--drivers/phy/phy-exynos-dp-video.c111
-rw-r--r--drivers/phy/phy-exynos-mipi-video.c176
-rw-r--r--drivers/phy/phy-omap-usb2.c324
-rw-r--r--drivers/phy/phy-twl4030-usb.c815
7 files changed, 2187 insertions, 0 deletions
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
new file mode 100644
index 000000000000..a344f3d52361
--- /dev/null
+++ b/drivers/phy/Kconfig
@@ -0,0 +1,54 @@
+#
+# PHY
+#
+
+menu "PHY Subsystem"
+
+config GENERIC_PHY
+ tristate "PHY Core"
+ help
+ Generic PHY support.
+
+ This framework is designed to provide a generic interface for PHY
+ devices present in the kernel. This layer will have the generic
+ API by which phy drivers can create PHY using the phy framework and
+ phy users can obtain reference to the PHY. All the users of this
+ framework should select this config.
+
+config PHY_EXYNOS_MIPI_VIDEO
+ tristate "S5P/EXYNOS SoC series MIPI CSI-2/DSI PHY driver"
+ help
+ Support for MIPI CSI-2 and MIPI DSI DPHY found on Samsung S5P
+ and EXYNOS SoCs.
+
+config OMAP_USB2
+ tristate "OMAP USB2 PHY Driver"
+ depends on ARCH_OMAP2PLUS
+ select GENERIC_PHY
+ select USB_PHY
+ select OMAP_CONTROL_USB
+ help
+ Enable this to support the transceiver that is part of SOC. This
+ driver takes care of all the PHY functionality apart from comparator.
+ The USB OTG controller communicates with the comparator using this
+ driver.
+
+config TWL4030_USB
+ tristate "TWL4030 USB Transceiver Driver"
+ depends on TWL4030_CORE && REGULATOR_TWL4030 && USB_MUSB_OMAP2PLUS
+ select GENERIC_PHY
+ select USB_PHY
+ help
+ Enable this to support the USB OTG transceiver on TWL4030
+ family chips (including the TWL5030 and TPS659x0 devices).
+ This transceiver supports high and full speed devices plus,
+ in host mode, low speed.
+
+config PHY_EXYNOS_DP_VIDEO
+ tristate "EXYNOS SoC series Display Port PHY driver"
+ depends on OF
+ select GENERIC_PHY
+ help
+ Support for Display Port PHY found on Samsung EXYNOS SoCs.
+
+endmenu
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
new file mode 100644
index 000000000000..d0caae9cfb83
--- /dev/null
+++ b/drivers/phy/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for the phy drivers.
+#
+
+obj-$(CONFIG_GENERIC_PHY) += phy-core.o
+obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o
+obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o
+obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
+obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
new file mode 100644
index 000000000000..03cf8fb81554
--- /dev/null
+++ b/drivers/phy/phy-core.c
@@ -0,0 +1,698 @@
+/*
+ * phy-core.c -- Generic Phy framework.
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: Kishon Vijay Abraham I <kishon@ti.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>
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/idr.h>
+#include <linux/pm_runtime.h>
+
+static struct class *phy_class;
+static DEFINE_MUTEX(phy_provider_mutex);
+static LIST_HEAD(phy_provider_list);
+static DEFINE_IDA(phy_ida);
+
+static void devm_phy_release(struct device *dev, void *res)
+{
+ struct phy *phy = *(struct phy **)res;
+
+ phy_put(phy);
+}
+
+static void devm_phy_provider_release(struct device *dev, void *res)
+{
+ struct phy_provider *phy_provider = *(struct phy_provider **)res;
+
+ of_phy_provider_unregister(phy_provider);
+}
+
+static void devm_phy_consume(struct device *dev, void *res)
+{
+ struct phy *phy = *(struct phy **)res;
+
+ phy_destroy(phy);
+}
+
+static int devm_phy_match(struct device *dev, void *res, void *match_data)
+{
+ return res == match_data;
+}
+
+static struct phy *phy_lookup(struct device *device, const char *port)
+{
+ unsigned int count;
+ struct phy *phy;
+ struct device *dev;
+ struct phy_consumer *consumers;
+ struct class_dev_iter iter;
+
+ class_dev_iter_init(&iter, phy_class, NULL, NULL);
+ while ((dev = class_dev_iter_next(&iter))) {
+ phy = to_phy(dev);
+ count = phy->init_data->num_consumers;
+ consumers = phy->init_data->consumers;
+ while (count--) {
+ if (!strcmp(consumers->dev_name, dev_name(device)) &&
+ !strcmp(consumers->port, port)) {
+ class_dev_iter_exit(&iter);
+ return phy;
+ }
+ consumers++;
+ }
+ }
+
+ class_dev_iter_exit(&iter);
+ return ERR_PTR(-ENODEV);
+}
+
+static struct phy_provider *of_phy_provider_lookup(struct device_node *node)
+{
+ struct phy_provider *phy_provider;
+
+ list_for_each_entry(phy_provider, &phy_provider_list, list) {
+ if (phy_provider->dev->of_node == node)
+ return phy_provider;
+ }
+
+ return ERR_PTR(-EPROBE_DEFER);
+}
+
+int phy_pm_runtime_get(struct phy *phy)
+{
+ if (!pm_runtime_enabled(&phy->dev))
+ return -ENOTSUPP;
+
+ return pm_runtime_get(&phy->dev);
+}
+EXPORT_SYMBOL_GPL(phy_pm_runtime_get);
+
+int phy_pm_runtime_get_sync(struct phy *phy)
+{
+ if (!pm_runtime_enabled(&phy->dev))
+ return -ENOTSUPP;
+
+ return pm_runtime_get_sync(&phy->dev);
+}
+EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync);
+
+int phy_pm_runtime_put(struct phy *phy)
+{
+ if (!pm_runtime_enabled(&phy->dev))
+ return -ENOTSUPP;
+
+ return pm_runtime_put(&phy->dev);
+}
+EXPORT_SYMBOL_GPL(phy_pm_runtime_put);
+
+int phy_pm_runtime_put_sync(struct phy *phy)
+{
+ if (!pm_runtime_enabled(&phy->dev))
+ return -ENOTSUPP;
+
+ return pm_runtime_put_sync(&phy->dev);
+}
+EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync);
+
+void phy_pm_runtime_allow(struct phy *phy)
+{
+ if (!pm_runtime_enabled(&phy->dev))
+ return;
+
+ pm_runtime_allow(&phy->dev);
+}
+EXPORT_SYMBOL_GPL(phy_pm_runtime_allow);
+
+void phy_pm_runtime_forbid(struct phy *phy)
+{
+ if (!pm_runtime_enabled(&phy->dev))
+ return;
+
+ pm_runtime_forbid(&phy->dev);
+}
+EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid);
+
+int phy_init(struct phy *phy)
+{
+ int ret;
+
+ ret = phy_pm_runtime_get_sync(phy);
+ if (ret < 0 && ret != -ENOTSUPP)
+ return ret;
+
+ mutex_lock(&phy->mutex);
+ if (phy->init_count++ == 0 && phy->ops->init) {
+ ret = phy->ops->init(phy);
+ if (ret < 0) {
+ dev_err(&phy->dev, "phy init failed --> %d\n", ret);
+ goto out;
+ }
+ }
+
+out:
+ mutex_unlock(&phy->mutex);
+ phy_pm_runtime_put(phy);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_init);
+
+int phy_exit(struct phy *phy)
+{
+ int ret;
+
+ ret = phy_pm_runtime_get_sync(phy);
+ if (ret < 0 && ret != -ENOTSUPP)
+ return ret;
+
+ mutex_lock(&phy->mutex);
+ if (--phy->init_count == 0 && phy->ops->exit) {
+ ret = phy->ops->exit(phy);
+ if (ret < 0) {
+ dev_err(&phy->dev, "phy exit failed --> %d\n", ret);
+ goto out;
+ }
+ }
+
+out:
+ mutex_unlock(&phy->mutex);
+ phy_pm_runtime_put(phy);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_exit);
+
+int phy_power_on(struct phy *phy)
+{
+ int ret = -ENOTSUPP;
+
+ ret = phy_pm_runtime_get_sync(phy);
+ if (ret < 0 && ret != -ENOTSUPP)
+ return ret;
+
+ mutex_lock(&phy->mutex);
+ if (phy->power_count++ == 0 && phy->ops->power_on) {
+ ret = phy->ops->power_on(phy);
+ if (ret < 0) {
+ dev_err(&phy->dev, "phy poweron failed --> %d\n", ret);
+ goto out;
+ }
+ }
+
+out:
+ mutex_unlock(&phy->mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_power_on);
+
+int phy_power_off(struct phy *phy)
+{
+ int ret = -ENOTSUPP;
+
+ mutex_lock(&phy->mutex);
+ if (--phy->power_count == 0 && phy->ops->power_off) {
+ ret = phy->ops->power_off(phy);
+ if (ret < 0) {
+ dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret);
+ goto out;
+ }
+ }
+
+out:
+ mutex_unlock(&phy->mutex);
+ phy_pm_runtime_put(phy);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_power_off);
+
+/**
+ * of_phy_get() - lookup and obtain a reference to a phy by phandle
+ * @dev: device that requests this phy
+ * @index: the index of the phy
+ *
+ * Returns the phy associated with the given phandle value,
+ * after getting a refcount to it or -ENODEV if there is no such phy or
+ * -EPROBE_DEFER if there is a phandle to the phy, but the device is
+ * not yet loaded. This function uses of_xlate call back function provided
+ * while registering the phy_provider to find the phy instance.
+ */
+static struct phy *of_phy_get(struct device *dev, int index)
+{
+ int ret;
+ struct phy_provider *phy_provider;
+ struct phy *phy = NULL;
+ struct of_phandle_args args;
+
+ ret = of_parse_phandle_with_args(dev->of_node, "phys", "#phy-cells",
+ index, &args);
+ if (ret) {
+ dev_dbg(dev, "failed to get phy in %s node\n",
+ dev->of_node->full_name);
+ return ERR_PTR(-ENODEV);
+ }
+
+ mutex_lock(&phy_provider_mutex);
+ phy_provider = of_phy_provider_lookup(args.np);
+ if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) {
+ phy = ERR_PTR(-EPROBE_DEFER);
+ goto err0;
+ }
+
+ phy = phy_provider->of_xlate(phy_provider->dev, &args);
+ module_put(phy_provider->owner);
+
+err0:
+ mutex_unlock(&phy_provider_mutex);
+ of_node_put(args.np);
+
+ return phy;
+}
+
+/**
+ * phy_put() - release the PHY
+ * @phy: the phy returned by phy_get()
+ *
+ * Releases a refcount the caller received from phy_get().
+ */
+void phy_put(struct phy *phy)
+{
+ if (IS_ERR(phy))
+ return;
+
+ module_put(phy->ops->owner);
+ put_device(&phy->dev);
+}
+EXPORT_SYMBOL_GPL(phy_put);
+
+/**
+ * devm_phy_put() - release the PHY
+ * @dev: device that wants to release this phy
+ * @phy: the phy returned by devm_phy_get()
+ *
+ * destroys the devres associated with this phy and invokes phy_put
+ * to release the phy.
+ */
+void devm_phy_put(struct device *dev, struct phy *phy)
+{
+ int r;
+
+ r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy);
+ dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
+}
+EXPORT_SYMBOL_GPL(devm_phy_put);
+
+/**
+ * of_phy_simple_xlate() - returns the phy instance from phy provider
+ * @dev: the PHY provider device
+ * @args: of_phandle_args (not used here)
+ *
+ * Intended to be used by phy provider for the common case where #phy-cells is
+ * 0. For other cases where #phy-cells is greater than '0', the phy provider
+ * should provide a custom of_xlate function that reads the *args* and returns
+ * the appropriate phy.
+ */
+struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args
+ *args)
+{
+ struct phy *phy;
+ struct class_dev_iter iter;
+ struct device_node *node = dev->of_node;
+
+ class_dev_iter_init(&iter, phy_class, NULL, NULL);
+ while ((dev = class_dev_iter_next(&iter))) {
+ phy = to_phy(dev);
+ if (node != phy->dev.of_node)
+ continue;
+
+ class_dev_iter_exit(&iter);
+ return phy;
+ }
+
+ class_dev_iter_exit(&iter);
+ return ERR_PTR(-ENODEV);
+}
+EXPORT_SYMBOL_GPL(of_phy_simple_xlate);
+
+/**
+ * phy_get() - lookup and obtain a reference to a phy.
+ * @dev: device that requests this phy
+ * @string: the phy name as given in the dt data or the name of the controller
+ * port for non-dt case
+ *
+ * Returns the phy driver, after getting a refcount to it; or
+ * -ENODEV if there is no such phy. The caller is responsible for
+ * calling phy_put() to release that count.
+ */
+struct phy *phy_get(struct device *dev, const char *string)
+{
+ int index = 0;
+ struct phy *phy = NULL;
+
+ if (string == NULL) {
+ dev_WARN(dev, "missing string\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (dev->of_node) {
+ index = of_property_match_string(dev->of_node, "phy-names",
+ string);
+ phy = of_phy_get(dev, index);
+ if (IS_ERR(phy)) {
+ dev_err(dev, "unable to find phy\n");
+ return phy;
+ }
+ } else {
+ phy = phy_lookup(dev, string);
+ if (IS_ERR(phy)) {
+ dev_err(dev, "unable to find phy\n");
+ return phy;
+ }
+ }
+
+ if (!try_module_get(phy->ops->owner))
+ return ERR_PTR(-EPROBE_DEFER);
+
+ get_device(&phy->dev);
+
+ return phy;
+}
+EXPORT_SYMBOL_GPL(phy_get);
+
+/**
+ * devm_phy_get() - lookup and obtain a reference to a phy.
+ * @dev: device that requests this phy
+ * @string: the phy name as given in the dt data or phy device name
+ * for non-dt case
+ *
+ * Gets the phy using phy_get(), and associates a device with it using
+ * devres. On driver detach, release function is invoked on the devres data,
+ * then, devres data is freed.
+ */
+struct phy *devm_phy_get(struct device *dev, const char *string)
+{
+ struct phy **ptr, *phy;
+
+ ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ phy = phy_get(dev, string);
+ if (!IS_ERR(phy)) {
+ *ptr = phy;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return phy;
+}
+EXPORT_SYMBOL_GPL(devm_phy_get);
+
+/**
+ * phy_create() - create a new phy
+ * @dev: device that is creating the new phy
+ * @ops: function pointers for performing phy operations
+ * @init_data: contains the list of PHY consumers or NULL
+ *
+ * Called to create a phy using phy framework.
+ */
+struct phy *phy_create(struct device *dev, const struct phy_ops *ops,
+ struct phy_init_data *init_data)
+{
+ int ret;
+ int id;
+ struct phy *phy;
+
+ if (!dev) {
+ dev_WARN(dev, "no device provided for PHY\n");
+ ret = -EINVAL;
+ goto err0;
+ }
+
+ phy = kzalloc(sizeof(*phy), GFP_KERNEL);
+ if (!phy) {
+ ret = -ENOMEM;
+ goto err0;
+ }
+
+ id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL);
+ if (id < 0) {
+ dev_err(dev, "unable to get id\n");
+ ret = id;
+ goto err0;
+ }
+
+ device_initialize(&phy->dev);
+ mutex_init(&phy->mutex);
+
+ phy->dev.class = phy_class;
+ phy->dev.parent = dev;
+ phy->dev.of_node = dev->of_node;
+ phy->id = id;
+ phy->ops = ops;
+ phy->init_data = init_data;
+
+ ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id);
+ if (ret)
+ goto err1;
+
+ ret = device_add(&phy->dev);
+ if (ret)
+ goto err1;
+
+ if (pm_runtime_enabled(dev)) {
+ pm_runtime_enable(&phy->dev);
+ pm_runtime_no_callbacks(&phy->dev);
+ }
+
+ return phy;
+
+err1:
+ ida_remove(&phy_ida, phy->id);
+ put_device(&phy->dev);
+ kfree(phy);
+
+err0:
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(phy_create);
+
+/**
+ * devm_phy_create() - create a new phy
+ * @dev: device that is creating the new phy
+ * @ops: function pointers for performing phy operations
+ * @init_data: contains the list of PHY consumers or NULL
+ *
+ * Creates a new PHY device adding it to the PHY class.
+ * While at that, it also associates the device with the phy using devres.
+ * On driver detach, release function is invoked on the devres data,
+ * then, devres data is freed.
+ */
+struct phy *devm_phy_create(struct device *dev, const struct phy_ops *ops,
+ struct phy_init_data *init_data)
+{
+ struct phy **ptr, *phy;
+
+ ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ phy = phy_create(dev, ops, init_data);
+ if (!IS_ERR(phy)) {
+ *ptr = phy;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return phy;
+}
+EXPORT_SYMBOL_GPL(devm_phy_create);
+
+/**
+ * phy_destroy() - destroy the phy
+ * @phy: the phy to be destroyed
+ *
+ * Called to destroy the phy.
+ */
+void phy_destroy(struct phy *phy)
+{
+ pm_runtime_disable(&phy->dev);
+ device_unregister(&phy->dev);
+}
+EXPORT_SYMBOL_GPL(phy_destroy);
+
+/**
+ * devm_phy_destroy() - destroy the PHY
+ * @dev: device that wants to release this phy
+ * @phy: the phy returned by devm_phy_get()
+ *
+ * destroys the devres associated with this phy and invokes phy_destroy
+ * to destroy the phy.
+ */
+void devm_phy_destroy(struct device *dev, struct phy *phy)
+{
+ int r;
+
+ r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy);
+ dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
+}
+EXPORT_SYMBOL_GPL(devm_phy_destroy);
+
+/**
+ * __of_phy_provider_register() - create/register phy provider with the framework
+ * @dev: struct device of the phy provider
+ * @owner: the module owner containing of_xlate
+ * @of_xlate: function pointer to obtain phy instance from phy provider
+ *
+ * Creates struct phy_provider from dev and of_xlate function pointer.
+ * This is used in the case of dt boot for finding the phy instance from
+ * phy provider.
+ */
+struct phy_provider *__of_phy_provider_register(struct device *dev,
+ struct module *owner, struct phy * (*of_xlate)(struct device *dev,
+ struct of_phandle_args *args))
+{
+ struct phy_provider *phy_provider;
+
+ phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL);
+ if (!phy_provider)
+ return ERR_PTR(-ENOMEM);
+
+ phy_provider->dev = dev;
+ phy_provider->owner = owner;
+ phy_provider->of_xlate = of_xlate;
+
+ mutex_lock(&phy_provider_mutex);
+ list_add_tail(&phy_provider->list, &phy_provider_list);
+ mutex_unlock(&phy_provider_mutex);
+
+ return phy_provider;
+}
+EXPORT_SYMBOL_GPL(__of_phy_provider_register);
+
+/**
+ * __devm_of_phy_provider_register() - create/register phy provider with the
+ * framework
+ * @dev: struct device of the phy provider
+ * @owner: the module owner containing of_xlate
+ * @of_xlate: function pointer to obtain phy instance from phy provider
+ *
+ * Creates struct phy_provider from dev and of_xlate function pointer.
+ * This is used in the case of dt boot for finding the phy instance from
+ * phy provider. While at that, it also associates the device with the
+ * phy provider using devres. On driver detach, release function is invoked
+ * on the devres data, then, devres data is freed.
+ */
+struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
+ struct module *owner, struct phy * (*of_xlate)(struct device *dev,
+ struct of_phandle_args *args))
+{
+ struct phy_provider **ptr, *phy_provider;
+
+ ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ phy_provider = __of_phy_provider_register(dev, owner, of_xlate);
+ if (!IS_ERR(phy_provider)) {
+ *ptr = phy_provider;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return phy_provider;
+}
+EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register);
+
+/**
+ * of_phy_provider_unregister() - unregister phy provider from the framework
+ * @phy_provider: phy provider returned by of_phy_provider_register()
+ *
+ * Removes the phy_provider created using of_phy_provider_register().
+ */
+void of_phy_provider_unregister(struct phy_provider *phy_provider)
+{
+ if (IS_ERR(phy_provider))
+ return;
+
+ mutex_lock(&phy_provider_mutex);
+ list_del(&phy_provider->list);
+ kfree(phy_provider);
+ mutex_unlock(&phy_provider_mutex);
+}
+EXPORT_SYMBOL_GPL(of_phy_provider_unregister);
+
+/**
+ * devm_of_phy_provider_unregister() - remove phy provider from the framework
+ * @dev: struct device of the phy provider
+ *
+ * destroys the devres associated with this phy provider and invokes
+ * of_phy_provider_unregister to unregister the phy provider.
+ */
+void devm_of_phy_provider_unregister(struct device *dev,
+ struct phy_provider *phy_provider) {
+ int r;
+
+ r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match,
+ phy_provider);
+ dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n");
+}
+EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister);
+
+/**
+ * phy_release() - release the phy
+ * @dev: the dev member within phy
+ *
+ * When the last reference to the device is removed, it is called
+ * from the embedded kobject as release method.
+ */
+static void phy_release(struct device *dev)
+{
+ struct phy *phy;
+
+ phy = to_phy(dev);
+ dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
+ ida_remove(&phy_ida, phy->id);
+ kfree(phy);
+}
+
+static int __init phy_core_init(void)
+{
+ phy_class = class_create(THIS_MODULE, "phy");
+ if (IS_ERR(phy_class)) {
+ pr_err("failed to create phy class --> %ld\n",
+ PTR_ERR(phy_class));
+ return PTR_ERR(phy_class);
+ }
+
+ phy_class->dev_release = phy_release;
+
+ return 0;
+}
+module_init(phy_core_init);
+
+static void __exit phy_core_exit(void)
+{
+ class_destroy(phy_class);
+}
+module_exit(phy_core_exit);
+
+MODULE_DESCRIPTION("Generic PHY Framework");
+MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/phy/phy-exynos-dp-video.c b/drivers/phy/phy-exynos-dp-video.c
new file mode 100644
index 000000000000..1dbe6ce7b2ce
--- /dev/null
+++ b/drivers/phy/phy-exynos-dp-video.c
@@ -0,0 +1,111 @@
+/*
+ * Samsung EXYNOS SoC series Display Port PHY driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Jingoo Han <jg1.han@samsung.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/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+/* DPTX_PHY_CONTROL register */
+#define EXYNOS_DPTX_PHY_ENABLE (1 << 0)
+
+struct exynos_dp_video_phy {
+ void __iomem *regs;
+};
+
+static int __set_phy_state(struct exynos_dp_video_phy *state, unsigned int on)
+{
+ u32 reg;
+
+ reg = readl(state->regs);
+ if (on)
+ reg |= EXYNOS_DPTX_PHY_ENABLE;
+ else
+ reg &= ~EXYNOS_DPTX_PHY_ENABLE;
+ writel(reg, state->regs);
+
+ return 0;
+}
+
+static int exynos_dp_video_phy_power_on(struct phy *phy)
+{
+ struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
+
+ return __set_phy_state(state, 1);
+}
+
+static int exynos_dp_video_phy_power_off(struct phy *phy)
+{
+ struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
+
+ return __set_phy_state(state, 0);
+}
+
+static struct phy_ops exynos_dp_video_phy_ops = {
+ .power_on = exynos_dp_video_phy_power_on,
+ .power_off = exynos_dp_video_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static int exynos_dp_video_phy_probe(struct platform_device *pdev)
+{
+ struct exynos_dp_video_phy *state;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ struct phy_provider *phy_provider;
+ struct phy *phy;
+
+ state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ state->regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(state->regs))
+ return PTR_ERR(state->regs);
+
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
+ phy = devm_phy_create(dev, &exynos_dp_video_phy_ops, NULL);
+ if (IS_ERR(phy)) {
+ dev_err(dev, "failed to create Display Port PHY\n");
+ return PTR_ERR(phy);
+ }
+ phy_set_drvdata(phy, state);
+
+ return 0;
+}
+
+static const struct of_device_id exynos_dp_video_phy_of_match[] = {
+ { .compatible = "samsung,exynos5250-dp-video-phy" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match);
+
+static struct platform_driver exynos_dp_video_phy_driver = {
+ .probe = exynos_dp_video_phy_probe,
+ .driver = {
+ .name = "exynos-dp-video-phy",
+ .owner = THIS_MODULE,
+ .of_match_table = exynos_dp_video_phy_of_match,
+ }
+};
+module_platform_driver(exynos_dp_video_phy_driver);
+
+MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
+MODULE_DESCRIPTION("Samsung EXYNOS SoC DP PHY driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/phy/phy-exynos-mipi-video.c b/drivers/phy/phy-exynos-mipi-video.c
new file mode 100644
index 000000000000..0c5efab11af1
--- /dev/null
+++ b/drivers/phy/phy-exynos-mipi-video.c
@@ -0,0 +1,176 @@
+/*
+ * Samsung S5P/EXYNOS SoC series MIPI CSIS/DSIM DPHY driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Sylwester Nawrocki <s.nawrocki@samsung.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/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+
+/* MIPI_PHYn_CONTROL register offset: n = 0..1 */
+#define EXYNOS_MIPI_PHY_CONTROL(n) ((n) * 4)
+#define EXYNOS_MIPI_PHY_ENABLE (1 << 0)
+#define EXYNOS_MIPI_PHY_SRESETN (1 << 1)
+#define EXYNOS_MIPI_PHY_MRESETN (1 << 2)
+#define EXYNOS_MIPI_PHY_RESET_MASK (3 << 1)
+
+enum exynos_mipi_phy_id {
+ EXYNOS_MIPI_PHY_ID_CSIS0,
+ EXYNOS_MIPI_PHY_ID_DSIM0,
+ EXYNOS_MIPI_PHY_ID_CSIS1,
+ EXYNOS_MIPI_PHY_ID_DSIM1,
+ EXYNOS_MIPI_PHYS_NUM
+};
+
+#define is_mipi_dsim_phy_id(id) \
+ ((id) == EXYNOS_MIPI_PHY_ID_DSIM0 || (id) == EXYNOS_MIPI_PHY_ID_DSIM1)
+
+struct exynos_mipi_video_phy {
+ spinlock_t slock;
+ struct video_phy_desc {
+ struct phy *phy;
+ unsigned int index;
+ } phys[EXYNOS_MIPI_PHYS_NUM];
+ void __iomem *regs;
+};
+
+static int __set_phy_state(struct exynos_mipi_video_phy *state,
+ enum exynos_mipi_phy_id id, unsigned int on)
+{
+ void __iomem *addr;
+ u32 reg, reset;
+
+ addr = state->regs + EXYNOS_MIPI_PHY_CONTROL(id / 2);
+
+ if (is_mipi_dsim_phy_id(id))
+ reset = EXYNOS_MIPI_PHY_MRESETN;
+ else
+ reset = EXYNOS_MIPI_PHY_SRESETN;
+
+ spin_lock(&state->slock);
+ reg = readl(addr);
+ if (on)
+ reg |= reset;
+ else
+ reg &= ~reset;
+ writel(reg, addr);
+
+ /* Clear ENABLE bit only if MRESETN, SRESETN bits are not set. */
+ if (on)
+ reg |= EXYNOS_MIPI_PHY_ENABLE;
+ else if (!(reg & EXYNOS_MIPI_PHY_RESET_MASK))
+ reg &= ~EXYNOS_MIPI_PHY_ENABLE;
+
+ writel(reg, addr);
+ spin_unlock(&state->slock);
+ return 0;
+}
+
+#define to_mipi_video_phy(desc) \
+ container_of((desc), struct exynos_mipi_video_phy, phys[(desc)->index]);
+
+static int exynos_mipi_video_phy_power_on(struct phy *phy)
+{
+ struct video_phy_desc *phy_desc = phy_get_drvdata(phy);
+ struct exynos_mipi_video_phy *state = to_mipi_video_phy(phy_desc);
+
+ return __set_phy_state(state, phy_desc->index, 1);
+}
+
+static int exynos_mipi_video_phy_power_off(struct phy *phy)
+{
+ struct video_phy_desc *phy_desc = phy_get_drvdata(phy);
+ struct exynos_mipi_video_phy *state = to_mipi_video_phy(phy_desc);
+
+ return __set_phy_state(state, phy_desc->index, 0);
+}
+
+static struct phy *exynos_mipi_video_phy_xlate(struct device *dev,
+ struct of_phandle_args *args)
+{
+ struct exynos_mipi_video_phy *state = dev_get_drvdata(dev);
+
+ if (WARN_ON(args->args[0] > EXYNOS_MIPI_PHYS_NUM))
+ return ERR_PTR(-ENODEV);
+
+ return state->phys[args->args[0]].phy;
+}
+
+static struct phy_ops exynos_mipi_video_phy_ops = {
+ .power_on = exynos_mipi_video_phy_power_on,
+ .power_off = exynos_mipi_video_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static int exynos_mipi_video_phy_probe(struct platform_device *pdev)
+{
+ struct exynos_mipi_video_phy *state;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ struct phy_provider *phy_provider;
+ unsigned int i;
+
+ state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ state->regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(state->regs))
+ return PTR_ERR(state->regs);
+
+ dev_set_drvdata(dev, state);
+ spin_lock_init(&state->slock);
+
+ phy_provider = devm_of_phy_provider_register(dev,
+ exynos_mipi_video_phy_xlate);
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
+ for (i = 0; i < EXYNOS_MIPI_PHYS_NUM; i++) {
+ struct phy *phy = devm_phy_create(dev,
+ &exynos_mipi_video_phy_ops, NULL);
+ if (IS_ERR(phy)) {
+ dev_err(dev, "failed to create PHY %d\n", i);
+ return PTR_ERR(phy);
+ }
+
+ state->phys[i].phy = phy;
+ state->phys[i].index = i;
+ phy_set_drvdata(phy, &state->phys[i]);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id exynos_mipi_video_phy_of_match[] = {
+ { .compatible = "samsung,s5pv210-mipi-video-phy" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, exynos_mipi_video_phy_of_match);
+
+static struct platform_driver exynos_mipi_video_phy_driver = {
+ .probe = exynos_mipi_video_phy_probe,
+ .driver = {
+ .of_match_table = exynos_mipi_video_phy_of_match,
+ .name = "exynos-mipi-video-phy",
+ .owner = THIS_MODULE,
+ }
+};
+module_platform_driver(exynos_mipi_video_phy_driver);
+
+MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC MIPI CSI-2/DSI PHY driver");
+MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/phy/phy-omap-usb2.c b/drivers/phy/phy-omap-usb2.c
new file mode 100644
index 000000000000..bfc5c337f99a
--- /dev/null
+++ b/drivers/phy/phy-omap-usb2.c
@@ -0,0 +1,324 @@
+/*
+ * omap-usb2.c - USB PHY, talking to musb controller in OMAP.
+ *
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.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.
+ *
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * 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/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/io.h>
+#include <linux/usb/omap_usb.h>
+#include <linux/usb/phy_companion.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/pm_runtime.h>
+#include <linux/delay.h>
+#include <linux/usb/omap_control_usb.h>
+#include <linux/phy/phy.h>
+#include <linux/of_platform.h>
+
+/**
+ * omap_usb2_set_comparator - links the comparator present in the sytem with
+ * this phy
+ * @comparator - the companion phy(comparator) for this phy
+ *
+ * The phy companion driver should call this API passing the phy_companion
+ * filled with set_vbus and start_srp to be used by usb phy.
+ *
+ * For use by phy companion driver
+ */
+int omap_usb2_set_comparator(struct phy_companion *comparator)
+{
+ struct omap_usb *phy;
+ struct usb_phy *x = usb_get_phy(USB_PHY_TYPE_USB2);
+
+ if (IS_ERR(x))
+ return -ENODEV;
+
+ phy = phy_to_omapusb(x);
+ phy->comparator = comparator;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_usb2_set_comparator);
+
+static int omap_usb_set_vbus(struct usb_otg *otg, bool enabled)
+{
+ struct omap_usb *phy = phy_to_omapusb(otg->phy);
+
+ if (!phy->comparator)
+ return -ENODEV;
+
+ return phy->comparator->set_vbus(phy->comparator, enabled);
+}
+
+static int omap_usb_start_srp(struct usb_otg *otg)
+{
+ struct omap_usb *phy = phy_to_omapusb(otg->phy);
+
+ if (!phy->comparator)
+ return -ENODEV;
+
+ return phy->comparator->start_srp(phy->comparator);
+}
+
+static int omap_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ struct usb_phy *phy = otg->phy;
+
+ otg->host = host;
+ if (!host)
+ phy->state = OTG_STATE_UNDEFINED;
+
+ return 0;
+}
+
+static int omap_usb_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ struct usb_phy *phy = otg->phy;
+
+ otg->gadget = gadget;
+ if (!gadget)
+ phy->state = OTG_STATE_UNDEFINED;
+
+ return 0;
+}
+
+static int omap_usb2_suspend(struct usb_phy *x, int suspend)
+{
+ struct omap_usb *phy = phy_to_omapusb(x);
+ int ret;
+
+ if (suspend && !phy->is_suspended) {
+ omap_control_usb_phy_power(phy->control_dev, 0);
+ pm_runtime_put_sync(phy->dev);
+ phy->is_suspended = 1;
+ } else if (!suspend && phy->is_suspended) {
+ ret = pm_runtime_get_sync(phy->dev);
+ if (ret < 0) {
+ dev_err(phy->dev, "get_sync failed with err %d\n", ret);
+ return ret;
+ }
+ omap_control_usb_phy_power(phy->control_dev, 1);
+ phy->is_suspended = 0;
+ }
+
+ return 0;
+}
+
+static int omap_usb_power_off(struct phy *x)
+{
+ struct omap_usb *phy = phy_get_drvdata(x);
+
+ omap_control_usb_phy_power(phy->control_dev, 0);
+
+ return 0;
+}
+
+static int omap_usb_power_on(struct phy *x)
+{
+ struct omap_usb *phy = phy_get_drvdata(x);
+
+ omap_control_usb_phy_power(phy->control_dev, 1);
+
+ return 0;
+}
+
+static struct phy_ops ops = {
+ .power_on = omap_usb_power_on,
+ .power_off = omap_usb_power_off,
+ .owner = THIS_MODULE,
+};
+
+static int omap_usb2_probe(struct platform_device *pdev)
+{
+ struct omap_usb *phy;
+ struct phy *generic_phy;
+ struct phy_provider *phy_provider;
+ struct usb_otg *otg;
+ struct device_node *node = pdev->dev.of_node;
+ struct device_node *control_node;
+ struct platform_device *control_pdev;
+
+ if (!node)
+ return -EINVAL;
+
+ phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
+ if (!phy) {
+ dev_err(&pdev->dev, "unable to allocate memory for USB2 PHY\n");
+ return -ENOMEM;
+ }
+
+ otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
+ if (!otg) {
+ dev_err(&pdev->dev, "unable to allocate memory for USB OTG\n");
+ return -ENOMEM;
+ }
+
+ phy->dev = &pdev->dev;
+
+ phy->phy.dev = phy->dev;
+ phy->phy.label = "omap-usb2";
+ phy->phy.set_suspend = omap_usb2_suspend;
+ phy->phy.otg = otg;
+ phy->phy.type = USB_PHY_TYPE_USB2;
+
+ phy_provider = devm_of_phy_provider_register(phy->dev,
+ of_phy_simple_xlate);
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
+ control_node = of_parse_phandle(node, "ctrl-module", 0);
+ if (!control_node) {
+ dev_err(&pdev->dev, "Failed to get control device phandle\n");
+ return -EINVAL;
+ }
+
+ control_pdev = of_find_device_by_node(control_node);
+ if (!control_pdev) {
+ dev_err(&pdev->dev, "Failed to get control device\n");
+ return -EINVAL;
+ }
+
+ phy->control_dev = &control_pdev->dev;
+
+ phy->is_suspended = 1;
+ omap_control_usb_phy_power(phy->control_dev, 0);
+
+ otg->set_host = omap_usb_set_host;
+ otg->set_peripheral = omap_usb_set_peripheral;
+ otg->set_vbus = omap_usb_set_vbus;
+ otg->start_srp = omap_usb_start_srp;
+ otg->phy = &phy->phy;
+
+ platform_set_drvdata(pdev, phy);
+ pm_runtime_enable(phy->dev);
+
+ generic_phy = devm_phy_create(phy->dev, &ops, NULL);
+ if (IS_ERR(generic_phy))
+ return PTR_ERR(generic_phy);
+
+ phy_set_drvdata(generic_phy, phy);
+
+ phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
+ if (IS_ERR(phy->wkupclk)) {
+ dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
+ return PTR_ERR(phy->wkupclk);
+ }
+ clk_prepare(phy->wkupclk);
+
+ phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
+ if (IS_ERR(phy->optclk))
+ dev_vdbg(&pdev->dev, "unable to get refclk960m\n");
+ else
+ clk_prepare(phy->optclk);
+
+ usb_add_phy_dev(&phy->phy);
+
+ return 0;
+}
+
+static int omap_usb2_remove(struct platform_device *pdev)
+{
+ struct omap_usb *phy = platform_get_drvdata(pdev);
+
+ clk_unprepare(phy->wkupclk);
+ if (!IS_ERR(phy->optclk))
+ clk_unprepare(phy->optclk);
+ usb_remove_phy(&phy->phy);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+
+static int omap_usb2_runtime_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct omap_usb *phy = platform_get_drvdata(pdev);
+
+ clk_disable(phy->wkupclk);
+ if (!IS_ERR(phy->optclk))
+ clk_disable(phy->optclk);
+
+ return 0;
+}
+
+static int omap_usb2_runtime_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct omap_usb *phy = platform_get_drvdata(pdev);
+ int ret;
+
+ ret = clk_enable(phy->wkupclk);
+ if (ret < 0) {
+ dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
+ goto err0;
+ }
+
+ if (!IS_ERR(phy->optclk)) {
+ ret = clk_enable(phy->optclk);
+ if (ret < 0) {
+ dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
+ goto err1;
+ }
+ }
+
+ return 0;
+
+err1:
+ clk_disable(phy->wkupclk);
+
+err0:
+ return ret;
+}
+
+static const struct dev_pm_ops omap_usb2_pm_ops = {
+ SET_RUNTIME_PM_OPS(omap_usb2_runtime_suspend, omap_usb2_runtime_resume,
+ NULL)
+};
+
+#define DEV_PM_OPS (&omap_usb2_pm_ops)
+#else
+#define DEV_PM_OPS NULL
+#endif
+
+#ifdef CONFIG_OF
+static const struct of_device_id omap_usb2_id_table[] = {
+ { .compatible = "ti,omap-usb2" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, omap_usb2_id_table);
+#endif
+
+static struct platform_driver omap_usb2_driver = {
+ .probe = omap_usb2_probe,
+ .remove = omap_usb2_remove,
+ .driver = {
+ .name = "omap-usb2",
+ .owner = THIS_MODULE,
+ .pm = DEV_PM_OPS,
+ .of_match_table = of_match_ptr(omap_usb2_id_table),
+ },
+};
+
+module_platform_driver(omap_usb2_driver);
+
+MODULE_ALIAS("platform: omap_usb2");
+MODULE_AUTHOR("Texas Instruments Inc.");
+MODULE_DESCRIPTION("OMAP USB2 phy driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/phy/phy-twl4030-usb.c b/drivers/phy/phy-twl4030-usb.c
new file mode 100644
index 000000000000..daf65e68aaab
--- /dev/null
+++ b/drivers/phy/phy-twl4030-usb.c
@@ -0,0 +1,815 @@
+/*
+ * twl4030_usb - TWL4030 USB transceiver, talking to OMAP OTG controller
+ *
+ * Copyright (C) 2004-2007 Texas Instruments
+ * Copyright (C) 2008 Nokia Corporation
+ * Contact: Felipe Balbi <felipe.balbi@nokia.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.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Current status:
+ * - HS USB ULPI mode works.
+ * - 3-pin mode support may be added in future.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/usb/otg.h>
+#include <linux/phy/phy.h>
+#include <linux/usb/musb-omap.h>
+#include <linux/usb/ulpi.h>
+#include <linux/i2c/twl.h>
+#include <linux/regulator/consumer.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+
+/* Register defines */
+
+#define MCPC_CTRL 0x30
+#define MCPC_CTRL_RTSOL (1 << 7)
+#define MCPC_CTRL_EXTSWR (1 << 6)
+#define MCPC_CTRL_EXTSWC (1 << 5)
+#define MCPC_CTRL_VOICESW (1 << 4)
+#define MCPC_CTRL_OUT64K (1 << 3)
+#define MCPC_CTRL_RTSCTSSW (1 << 2)
+#define MCPC_CTRL_HS_UART (1 << 0)
+
+#define MCPC_IO_CTRL 0x33
+#define MCPC_IO_CTRL_MICBIASEN (1 << 5)
+#define MCPC_IO_CTRL_CTS_NPU (1 << 4)
+#define MCPC_IO_CTRL_RXD_PU (1 << 3)
+#define MCPC_IO_CTRL_TXDTYP (1 << 2)
+#define MCPC_IO_CTRL_CTSTYP (1 << 1)
+#define MCPC_IO_CTRL_RTSTYP (1 << 0)
+
+#define MCPC_CTRL2 0x36
+#define MCPC_CTRL2_MCPC_CK_EN (1 << 0)
+
+#define OTHER_FUNC_CTRL 0x80
+#define OTHER_FUNC_CTRL_BDIS_ACON_EN (1 << 4)
+#define OTHER_FUNC_CTRL_FIVEWIRE_MODE (1 << 2)
+
+#define OTHER_IFC_CTRL 0x83
+#define OTHER_IFC_CTRL_OE_INT_EN (1 << 6)
+#define OTHER_IFC_CTRL_CEA2011_MODE (1 << 5)
+#define OTHER_IFC_CTRL_FSLSSERIALMODE_4PIN (1 << 4)
+#define OTHER_IFC_CTRL_HIZ_ULPI_60MHZ_OUT (1 << 3)
+#define OTHER_IFC_CTRL_HIZ_ULPI (1 << 2)
+#define OTHER_IFC_CTRL_ALT_INT_REROUTE (1 << 0)
+
+#define OTHER_INT_EN_RISE 0x86
+#define OTHER_INT_EN_FALL 0x89
+#define OTHER_INT_STS 0x8C
+#define OTHER_INT_LATCH 0x8D
+#define OTHER_INT_VB_SESS_VLD (1 << 7)
+#define OTHER_INT_DM_HI (1 << 6) /* not valid for "latch" reg */
+#define OTHER_INT_DP_HI (1 << 5) /* not valid for "latch" reg */
+#define OTHER_INT_BDIS_ACON (1 << 3) /* not valid for "fall" regs */
+#define OTHER_INT_MANU (1 << 1)
+#define OTHER_INT_ABNORMAL_STRESS (1 << 0)
+
+#define ID_STATUS 0x96
+#define ID_RES_FLOAT (1 << 4)
+#define ID_RES_440K (1 << 3)
+#define ID_RES_200K (1 << 2)
+#define ID_RES_102K (1 << 1)
+#define ID_RES_GND (1 << 0)
+
+#define POWER_CTRL 0xAC
+#define POWER_CTRL_OTG_ENAB (1 << 5)
+
+#define OTHER_IFC_CTRL2 0xAF
+#define OTHER_IFC_CTRL2_ULPI_STP_LOW (1 << 4)
+#define OTHER_IFC_CTRL2_ULPI_TXEN_POL (1 << 3)
+#define OTHER_IFC_CTRL2_ULPI_4PIN_2430 (1 << 2)
+#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_MASK (3 << 0) /* bits 0 and 1 */
+#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT1N (0 << 0)
+#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT2N (1 << 0)
+
+#define REG_CTRL_EN 0xB2
+#define REG_CTRL_ERROR 0xB5
+#define ULPI_I2C_CONFLICT_INTEN (1 << 0)
+
+#define OTHER_FUNC_CTRL2 0xB8
+#define OTHER_FUNC_CTRL2_VBAT_TIMER_EN (1 << 0)
+
+/* following registers do not have separate _clr and _set registers */
+#define VBUS_DEBOUNCE 0xC0
+#define ID_DEBOUNCE 0xC1
+#define VBAT_TIMER 0xD3
+#define PHY_PWR_CTRL 0xFD
+#define PHY_PWR_PHYPWD (1 << 0)
+#define PHY_CLK_CTRL 0xFE
+#define PHY_CLK_CTRL_CLOCKGATING_EN (1 << 2)
+#define PHY_CLK_CTRL_CLK32K_EN (1 << 1)
+#define REQ_PHY_DPLL_CLK (1 << 0)
+#define PHY_CLK_CTRL_STS 0xFF
+#define PHY_DPLL_CLK (1 << 0)
+
+/* In module TWL_MODULE_PM_MASTER */
+#define STS_HW_CONDITIONS 0x0F
+
+/* In module TWL_MODULE_PM_RECEIVER */
+#define VUSB_DEDICATED1 0x7D
+#define VUSB_DEDICATED2 0x7E
+#define VUSB1V5_DEV_GRP 0x71
+#define VUSB1V5_TYPE 0x72
+#define VUSB1V5_REMAP 0x73
+#define VUSB1V8_DEV_GRP 0x74
+#define VUSB1V8_TYPE 0x75
+#define VUSB1V8_REMAP 0x76
+#define VUSB3V1_DEV_GRP 0x77
+#define VUSB3V1_TYPE 0x78
+#define VUSB3V1_REMAP 0x79
+
+/* In module TWL4030_MODULE_INTBR */
+#define PMBR1 0x0D
+#define GPIO_USB_4PIN_ULPI_2430C (3 << 0)
+
+struct twl4030_usb {
+ struct usb_phy phy;
+ struct device *dev;
+
+ /* TWL4030 internal USB regulator supplies */
+ struct regulator *usb1v5;
+ struct regulator *usb1v8;
+ struct regulator *usb3v1;
+
+ /* for vbus reporting with irqs disabled */
+ spinlock_t lock;
+
+ /* pin configuration */
+ enum twl4030_usb_mode usb_mode;
+
+ int irq;
+ enum omap_musb_vbus_id_status linkstat;
+ bool vbus_supplied;
+ u8 asleep;
+ bool irq_enabled;
+
+ struct delayed_work id_workaround_work;
+};
+
+/* internal define on top of container_of */
+#define phy_to_twl(x) container_of((x), struct twl4030_usb, phy)
+
+/*-------------------------------------------------------------------------*/
+
+static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl,
+ u8 module, u8 data, u8 address)
+{
+ u8 check;
+
+ if ((twl_i2c_write_u8(module, data, address) >= 0) &&
+ (twl_i2c_read_u8(module, &check, address) >= 0) &&
+ (check == data))
+ return 0;
+ dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
+ 1, module, address, check, data);
+
+ /* Failed once: Try again */
+ if ((twl_i2c_write_u8(module, data, address) >= 0) &&
+ (twl_i2c_read_u8(module, &check, address) >= 0) &&
+ (check == data))
+ return 0;
+ dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
+ 2, module, address, check, data);
+
+ /* Failed again: Return error */
+ return -EBUSY;
+}
+
+#define twl4030_usb_write_verify(twl, address, data) \
+ twl4030_i2c_write_u8_verify(twl, TWL_MODULE_USB, (data), (address))
+
+static inline int twl4030_usb_write(struct twl4030_usb *twl,
+ u8 address, u8 data)
+{
+ int ret = 0;
+
+ ret = twl_i2c_write_u8(TWL_MODULE_USB, data, address);
+ if (ret < 0)
+ dev_dbg(twl->dev,
+ "TWL4030:USB:Write[0x%x] Error %d\n", address, ret);
+ return ret;
+}
+
+static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address)
+{
+ u8 data;
+ int ret = 0;
+
+ ret = twl_i2c_read_u8(module, &data, address);
+ if (ret >= 0)
+ ret = data;
+ else
+ dev_dbg(twl->dev,
+ "TWL4030:readb[0x%x,0x%x] Error %d\n",
+ module, address, ret);
+
+ return ret;
+}
+
+static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address)
+{
+ return twl4030_readb(twl, TWL_MODULE_USB, address);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static inline int
+twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
+{
+ return twl4030_usb_write(twl, ULPI_SET(reg), bits);
+}
+
+static inline int
+twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
+{
+ return twl4030_usb_write(twl, ULPI_CLR(reg), bits);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static bool twl4030_is_driving_vbus(struct twl4030_usb *twl)
+{
+ int ret;
+
+ ret = twl4030_usb_read(twl, PHY_CLK_CTRL_STS);
+ if (ret < 0 || !(ret & PHY_DPLL_CLK))
+ /*
+ * if clocks are off, registers are not updated,
+ * but we can assume we don't drive VBUS in this case
+ */
+ return false;
+
+ ret = twl4030_usb_read(twl, ULPI_OTG_CTRL);
+ if (ret < 0)
+ return false;
+
+ return (ret & (ULPI_OTG_DRVVBUS | ULPI_OTG_CHRGVBUS)) ? true : false;
+}
+
+static enum omap_musb_vbus_id_status
+ twl4030_usb_linkstat(struct twl4030_usb *twl)
+{
+ int status;
+ enum omap_musb_vbus_id_status linkstat = OMAP_MUSB_UNKNOWN;
+
+ twl->vbus_supplied = false;
+
+ /*
+ * For ID/VBUS sensing, see manual section 15.4.8 ...
+ * except when using only battery backup power, two
+ * comparators produce VBUS_PRES and ID_PRES signals,
+ * which don't match docs elsewhere. But ... BIT(7)
+ * and BIT(2) of STS_HW_CONDITIONS, respectively, do
+ * seem to match up. If either is true the USB_PRES
+ * signal is active, the OTG module is activated, and
+ * its interrupt may be raised (may wake the system).
+ */
+ status = twl4030_readb(twl, TWL_MODULE_PM_MASTER, STS_HW_CONDITIONS);
+ if (status < 0)
+ dev_err(twl->dev, "USB link status err %d\n", status);
+ else if (status & (BIT(7) | BIT(2))) {
+ if (status & BIT(7)) {
+ if (twl4030_is_driving_vbus(twl))
+ status &= ~BIT(7);
+ else
+ twl->vbus_supplied = true;
+ }
+
+ if (status & BIT(2))
+ linkstat = OMAP_MUSB_ID_GROUND;
+ else if (status & BIT(7))
+ linkstat = OMAP_MUSB_VBUS_VALID;
+ else
+ linkstat = OMAP_MUSB_VBUS_OFF;
+ } else {
+ if (twl->linkstat != OMAP_MUSB_UNKNOWN)
+ linkstat = OMAP_MUSB_VBUS_OFF;
+ }
+
+ dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
+ status, status, linkstat);
+
+ /* REVISIT this assumes host and peripheral controllers
+ * are registered, and that both are active...
+ */
+
+ return linkstat;
+}
+
+static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode)
+{
+ twl->usb_mode = mode;
+
+ switch (mode) {
+ case T2_USB_MODE_ULPI:
+ twl4030_usb_clear_bits(twl, ULPI_IFC_CTRL,
+ ULPI_IFC_CTRL_CARKITMODE);
+ twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
+ twl4030_usb_clear_bits(twl, ULPI_FUNC_CTRL,
+ ULPI_FUNC_CTRL_XCVRSEL_MASK |
+ ULPI_FUNC_CTRL_OPMODE_MASK);
+ break;
+ case -1:
+ /* FIXME: power on defaults */
+ break;
+ default:
+ dev_err(twl->dev, "unsupported T2 transceiver mode %d\n",
+ mode);
+ break;
+ };
+}
+
+static void twl4030_i2c_access(struct twl4030_usb *twl, int on)
+{
+ unsigned long timeout;
+ int val = twl4030_usb_read(twl, PHY_CLK_CTRL);
+
+ if (val >= 0) {
+ if (on) {
+ /* enable DPLL to access PHY registers over I2C */
+ val |= REQ_PHY_DPLL_CLK;
+ WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
+ (u8)val) < 0);
+
+ timeout = jiffies + HZ;
+ while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
+ PHY_DPLL_CLK)
+ && time_before(jiffies, timeout))
+ udelay(10);
+ if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
+ PHY_DPLL_CLK))
+ dev_err(twl->dev, "Timeout setting T2 HSUSB "
+ "PHY DPLL clock\n");
+ } else {
+ /* let ULPI control the DPLL clock */
+ val &= ~REQ_PHY_DPLL_CLK;
+ WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
+ (u8)val) < 0);
+ }
+ }
+}
+
+static void __twl4030_phy_power(struct twl4030_usb *twl, int on)
+{
+ u8 pwr = twl4030_usb_read(twl, PHY_PWR_CTRL);
+
+ if (on)
+ pwr &= ~PHY_PWR_PHYPWD;
+ else
+ pwr |= PHY_PWR_PHYPWD;
+
+ WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
+}
+
+static void twl4030_phy_power(struct twl4030_usb *twl, int on)
+{
+ int ret;
+
+ if (on) {
+ ret = regulator_enable(twl->usb3v1);
+ if (ret)
+ dev_err(twl->dev, "Failed to enable usb3v1\n");
+
+ ret = regulator_enable(twl->usb1v8);
+ if (ret)
+ dev_err(twl->dev, "Failed to enable usb1v8\n");
+
+ /*
+ * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP
+ * in twl4030) resets the VUSB_DEDICATED2 register. This reset
+ * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to
+ * SLEEP. We work around this by clearing the bit after usv3v1
+ * is re-activated. This ensures that VUSB3V1 is really active.
+ */
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);
+
+ ret = regulator_enable(twl->usb1v5);
+ if (ret)
+ dev_err(twl->dev, "Failed to enable usb1v5\n");
+
+ __twl4030_phy_power(twl, 1);
+ twl4030_usb_write(twl, PHY_CLK_CTRL,
+ twl4030_usb_read(twl, PHY_CLK_CTRL) |
+ (PHY_CLK_CTRL_CLOCKGATING_EN |
+ PHY_CLK_CTRL_CLK32K_EN));
+ } else {
+ __twl4030_phy_power(twl, 0);
+ regulator_disable(twl->usb1v5);
+ regulator_disable(twl->usb1v8);
+ regulator_disable(twl->usb3v1);
+ }
+}
+
+static int twl4030_phy_power_off(struct phy *phy)
+{
+ struct twl4030_usb *twl = phy_get_drvdata(phy);
+
+ if (twl->asleep)
+ return 0;
+
+ twl4030_phy_power(twl, 0);
+ twl->asleep = 1;
+ dev_dbg(twl->dev, "%s\n", __func__);
+ return 0;
+}
+
+static void __twl4030_phy_power_on(struct twl4030_usb *twl)
+{
+ twl4030_phy_power(twl, 1);
+ twl4030_i2c_access(twl, 1);
+ twl4030_usb_set_mode(twl, twl->usb_mode);
+ if (twl->usb_mode == T2_USB_MODE_ULPI)
+ twl4030_i2c_access(twl, 0);
+}
+
+static int twl4030_phy_power_on(struct phy *phy)
+{
+ struct twl4030_usb *twl = phy_get_drvdata(phy);
+
+ if (!twl->asleep)
+ return 0;
+ __twl4030_phy_power_on(twl);
+ twl->asleep = 0;
+ dev_dbg(twl->dev, "%s\n", __func__);
+
+ /*
+ * XXX When VBUS gets driven after musb goes to A mode,
+ * ID_PRES related interrupts no longer arrive, why?
+ * Register itself is updated fine though, so we must poll.
+ */
+ if (twl->linkstat == OMAP_MUSB_ID_GROUND) {
+ cancel_delayed_work(&twl->id_workaround_work);
+ schedule_delayed_work(&twl->id_workaround_work, HZ);
+ }
+ return 0;
+}
+
+static int twl4030_usb_ldo_init(struct twl4030_usb *twl)
+{
+ /* Enable writing to power configuration registers */
+ twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
+ TWL4030_PM_MASTER_PROTECT_KEY);
+
+ twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
+ TWL4030_PM_MASTER_PROTECT_KEY);
+
+ /* Keep VUSB3V1 LDO in sleep state until VBUS/ID change detected*/
+ /*twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);*/
+
+ /* input to VUSB3V1 LDO is from VBAT, not VBUS */
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1);
+
+ /* Initialize 3.1V regulator */
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP);
+
+ twl->usb3v1 = devm_regulator_get(twl->dev, "usb3v1");
+ if (IS_ERR(twl->usb3v1))
+ return -ENODEV;
+
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE);
+
+ /* Initialize 1.5V regulator */
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP);
+
+ twl->usb1v5 = devm_regulator_get(twl->dev, "usb1v5");
+ if (IS_ERR(twl->usb1v5))
+ return -ENODEV;
+
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE);
+
+ /* Initialize 1.8V regulator */
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP);
+
+ twl->usb1v8 = devm_regulator_get(twl->dev, "usb1v8");
+ if (IS_ERR(twl->usb1v8))
+ return -ENODEV;
+
+ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
+
+ /* disable access to power configuration registers */
+ twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
+ TWL4030_PM_MASTER_PROTECT_KEY);
+
+ return 0;
+}
+
+static ssize_t twl4030_usb_vbus_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct twl4030_usb *twl = dev_get_drvdata(dev);
+ unsigned long flags;
+ int ret = -EINVAL;
+
+ spin_lock_irqsave(&twl->lock, flags);
+ ret = sprintf(buf, "%s\n",
+ twl->vbus_supplied ? "on" : "off");
+ spin_unlock_irqrestore(&twl->lock, flags);
+
+ return ret;
+}
+static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL);
+
+static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
+{
+ struct twl4030_usb *twl = _twl;
+ enum omap_musb_vbus_id_status status;
+ bool status_changed = false;
+
+ status = twl4030_usb_linkstat(twl);
+
+ spin_lock_irq(&twl->lock);
+ if (status >= 0 && status != twl->linkstat) {
+ twl->linkstat = status;
+ status_changed = true;
+ }
+ spin_unlock_irq(&twl->lock);
+
+ if (status_changed) {
+ /* FIXME add a set_power() method so that B-devices can
+ * configure the charger appropriately. It's not always
+ * correct to consume VBUS power, and how much current to
+ * consume is a function of the USB configuration chosen
+ * by the host.
+ *
+ * REVISIT usb_gadget_vbus_connect(...) as needed, ditto
+ * its disconnect() sibling, when changing to/from the
+ * USB_LINK_VBUS state. musb_hdrc won't care until it
+ * starts to handle softconnect right.
+ */
+ omap_musb_mailbox(status);
+ }
+ sysfs_notify(&twl->dev->kobj, NULL, "vbus");
+
+ return IRQ_HANDLED;
+}
+
+static void twl4030_id_workaround_work(struct work_struct *work)
+{
+ struct twl4030_usb *twl = container_of(work, struct twl4030_usb,
+ id_workaround_work.work);
+ enum omap_musb_vbus_id_status status;
+ bool status_changed = false;
+
+ status = twl4030_usb_linkstat(twl);
+
+ spin_lock_irq(&twl->lock);
+ if (status >= 0 && status != twl->linkstat) {
+ twl->linkstat = status;
+ status_changed = true;
+ }
+ spin_unlock_irq(&twl->lock);
+
+ if (status_changed) {
+ dev_dbg(twl->dev, "handle missing status change to %d\n",
+ status);
+ omap_musb_mailbox(status);
+ }
+
+ /* don't schedule during sleep - irq works right then */
+ if (status == OMAP_MUSB_ID_GROUND && !twl->asleep) {
+ cancel_delayed_work(&twl->id_workaround_work);
+ schedule_delayed_work(&twl->id_workaround_work, HZ);
+ }
+}
+
+static int twl4030_phy_init(struct phy *phy)
+{
+ struct twl4030_usb *twl = phy_get_drvdata(phy);
+ enum omap_musb_vbus_id_status status;
+
+ /*
+ * Start in sleep state, we'll get called through set_suspend()
+ * callback when musb is runtime resumed and it's time to start.
+ */
+ __twl4030_phy_power(twl, 0);
+ twl->asleep = 1;
+
+ status = twl4030_usb_linkstat(twl);
+ twl->linkstat = status;
+
+ if (status == OMAP_MUSB_ID_GROUND || status == OMAP_MUSB_VBUS_VALID) {
+ omap_musb_mailbox(twl->linkstat);
+ twl4030_phy_power_on(phy);
+ }
+
+ sysfs_notify(&twl->dev->kobj, NULL, "vbus");
+ return 0;
+}
+
+static int twl4030_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ if (!otg)
+ return -ENODEV;
+
+ otg->gadget = gadget;
+ if (!gadget)
+ otg->phy->state = OTG_STATE_UNDEFINED;
+
+ return 0;
+}
+
+static int twl4030_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ if (!otg)
+ return -ENODEV;
+
+ otg->host = host;
+ if (!host)
+ otg->phy->state = OTG_STATE_UNDEFINED;
+
+ return 0;
+}
+
+static const struct phy_ops ops = {
+ .init = twl4030_phy_init,
+ .power_on = twl4030_phy_power_on,
+ .power_off = twl4030_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static int twl4030_usb_probe(struct platform_device *pdev)
+{
+ struct twl4030_usb_data *pdata = dev_get_platdata(&pdev->dev);
+ struct twl4030_usb *twl;
+ struct phy *phy;
+ int status, err;
+ struct usb_otg *otg;
+ struct device_node *np = pdev->dev.of_node;
+ struct phy_provider *phy_provider;
+ struct phy_init_data *init_data = NULL;
+
+ twl = devm_kzalloc(&pdev->dev, sizeof *twl, GFP_KERNEL);
+ if (!twl)
+ return -ENOMEM;
+
+ if (np)
+ of_property_read_u32(np, "usb_mode",
+ (enum twl4030_usb_mode *)&twl->usb_mode);
+ else if (pdata) {
+ twl->usb_mode = pdata->usb_mode;
+ init_data = pdata->init_data;
+ } else {
+ dev_err(&pdev->dev, "twl4030 initialized without pdata\n");
+ return -EINVAL;
+ }
+
+ otg = devm_kzalloc(&pdev->dev, sizeof *otg, GFP_KERNEL);
+ if (!otg)
+ return -ENOMEM;
+
+ twl->dev = &pdev->dev;
+ twl->irq = platform_get_irq(pdev, 0);
+ twl->vbus_supplied = false;
+ twl->asleep = 1;
+ twl->linkstat = OMAP_MUSB_UNKNOWN;
+
+ twl->phy.dev = twl->dev;
+ twl->phy.label = "twl4030";
+ twl->phy.otg = otg;
+ twl->phy.type = USB_PHY_TYPE_USB2;
+
+ otg->phy = &twl->phy;
+ otg->set_host = twl4030_set_host;
+ otg->set_peripheral = twl4030_set_peripheral;
+
+ phy_provider = devm_of_phy_provider_register(twl->dev,
+ of_phy_simple_xlate);
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
+ phy = devm_phy_create(twl->dev, &ops, init_data);
+ if (IS_ERR(phy)) {
+ dev_dbg(&pdev->dev, "Failed to create PHY\n");
+ return PTR_ERR(phy);
+ }
+
+ phy_set_drvdata(phy, twl);
+
+ /* init spinlock for workqueue */
+ spin_lock_init(&twl->lock);
+
+ INIT_DELAYED_WORK(&twl->id_workaround_work, twl4030_id_workaround_work);
+
+ err = twl4030_usb_ldo_init(twl);
+ if (err) {
+ dev_err(&pdev->dev, "ldo init failed\n");
+ return err;
+ }
+ usb_add_phy_dev(&twl->phy);
+
+ platform_set_drvdata(pdev, twl);
+ if (device_create_file(&pdev->dev, &dev_attr_vbus))
+ dev_warn(&pdev->dev, "could not create sysfs file\n");
+
+ ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier);
+
+ /* Our job is to use irqs and status from the power module
+ * to keep the transceiver disabled when nothing's connected.
+ *
+ * FIXME we actually shouldn't start enabling it until the
+ * USB controller drivers have said they're ready, by calling
+ * set_host() and/or set_peripheral() ... OTG_capable boards
+ * need both handles, otherwise just one suffices.
+ */
+ twl->irq_enabled = true;
+ status = devm_request_threaded_irq(twl->dev, twl->irq, NULL,
+ twl4030_usb_irq, IRQF_TRIGGER_FALLING |
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT, "twl4030_usb", twl);
+ if (status < 0) {
+ dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n",
+ twl->irq, status);
+ return status;
+ }
+
+ dev_info(&pdev->dev, "Initialized TWL4030 USB module\n");
+ return 0;
+}
+
+static int twl4030_usb_remove(struct platform_device *pdev)
+{
+ struct twl4030_usb *twl = platform_get_drvdata(pdev);
+ int val;
+
+ cancel_delayed_work(&twl->id_workaround_work);
+ device_remove_file(twl->dev, &dev_attr_vbus);
+
+ /* set transceiver mode to power on defaults */
+ twl4030_usb_set_mode(twl, -1);
+
+ /* autogate 60MHz ULPI clock,
+ * clear dpll clock request for i2c access,
+ * disable 32KHz
+ */
+ val = twl4030_usb_read(twl, PHY_CLK_CTRL);
+ if (val >= 0) {
+ val |= PHY_CLK_CTRL_CLOCKGATING_EN;
+ val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK);
+ twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val);
+ }
+
+ /* disable complete OTG block */
+ twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
+
+ if (!twl->asleep)
+ twl4030_phy_power(twl, 0);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id twl4030_usb_id_table[] = {
+ { .compatible = "ti,twl4030-usb" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, twl4030_usb_id_table);
+#endif
+
+static struct platform_driver twl4030_usb_driver = {
+ .probe = twl4030_usb_probe,
+ .remove = twl4030_usb_remove,
+ .driver = {
+ .name = "twl4030_usb",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(twl4030_usb_id_table),
+ },
+};
+
+static int __init twl4030_usb_init(void)
+{
+ return platform_driver_register(&twl4030_usb_driver);
+}
+subsys_initcall(twl4030_usb_init);
+
+static void __exit twl4030_usb_exit(void)
+{
+ platform_driver_unregister(&twl4030_usb_driver);
+}
+module_exit(twl4030_usb_exit);
+
+MODULE_ALIAS("platform:twl4030_usb");
+MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation");
+MODULE_DESCRIPTION("TWL4030 USB transceiver driver");
+MODULE_LICENSE("GPL");