[linux-2.6-block.git] / drivers / usb / phy / phy-generic.c

/*
 * NOP USB transceiver for all USB transceiver which are either built-in
 * into USB IP or which are mostly autonomous.
 *
 * Copyright (C) 2009 Texas Instruments Inc
 * Author: Ajay Kumar Gupta <ajay.gupta@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.
 *
 * 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:
 *	This provides a "nop" transceiver for PHYs which are
 *	autonomous such as isp1504, isp1707, etc.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <linux/usb/usb_phy_generic.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/regulator/consumer.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/gpio.h>
#include <linux/delay.h>

#include "phy-generic.h"

#define VBUS_IRQ_FLAGS \
	(IRQF_SHARED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | \
		IRQF_ONESHOT)

struct platform_device *usb_phy_generic_register(void)
{
	return platform_device_register_simple("usb_phy_generic",
			PLATFORM_DEVID_AUTO, NULL, 0);
}
EXPORT_SYMBOL_GPL(usb_phy_generic_register);

void usb_phy_generic_unregister(struct platform_device *pdev)
{
	platform_device_unregister(pdev);
}
EXPORT_SYMBOL_GPL(usb_phy_generic_unregister);

static int nop_set_suspend(struct usb_phy *x, int suspend)
{
	struct usb_phy_generic *nop = dev_get_drvdata(x->dev);

	if (!IS_ERR(nop->clk)) {
		if (suspend)
			clk_disable_unprepare(nop->clk);
		else
			clk_prepare_enable(nop->clk);
	}

	return 0;
}

static void nop_reset(struct usb_phy_generic *nop)
{
	if (!nop->gpiod_reset)
		return;

	gpiod_set_value(nop->gpiod_reset, 1);
	usleep_range(10000, 20000);
	gpiod_set_value(nop->gpiod_reset, 0);
}

/* interface to regulator framework */
static void nop_set_vbus_draw(struct usb_phy_generic *nop, unsigned mA)
{
	struct regulator *vbus_draw = nop->vbus_draw;
	int enabled;
	int ret;

	if (!vbus_draw)
		return;

	enabled = nop->vbus_draw_enabled;
	if (mA) {
		regulator_set_current_limit(vbus_draw, 0, 1000 * mA);
		if (!enabled) {
			ret = regulator_enable(vbus_draw);
			if (ret < 0)
				return;
			nop->vbus_draw_enabled = 1;
		}
	} else {
		if (enabled) {
			ret = regulator_disable(vbus_draw);
			if (ret < 0)
				return;
			nop->vbus_draw_enabled = 0;
		}
	}
	nop->mA = mA;
}


static irqreturn_t nop_gpio_vbus_thread(int irq, void *data)
{
	struct usb_phy_generic *nop = data;
	struct usb_otg *otg = nop->phy.otg;
	int vbus, status;

	vbus = gpiod_get_value(nop->gpiod_vbus);
	if ((vbus ^ nop->vbus) == 0)
		return IRQ_HANDLED;
	nop->vbus = vbus;

	if (vbus) {
		status = USB_EVENT_VBUS;
		otg->state = OTG_STATE_B_PERIPHERAL;
		nop->phy.last_event = status;

		/* drawing a "unit load" is *always* OK, except for OTG */
		nop_set_vbus_draw(nop, 100);

		atomic_notifier_call_chain(&nop->phy.notifier, status,
					   otg->gadget);
	} else {
		nop_set_vbus_draw(nop, 0);

		status = USB_EVENT_NONE;
		otg->state = OTG_STATE_B_IDLE;
		nop->phy.last_event = status;

		atomic_notifier_call_chain(&nop->phy.notifier, status,
					   otg->gadget);
	}
	return IRQ_HANDLED;
}

int usb_gen_phy_init(struct usb_phy *phy)
{
	struct usb_phy_generic *nop = dev_get_drvdata(phy->dev);
	int ret;

	if (!IS_ERR(nop->vcc)) {
		if (regulator_enable(nop->vcc))
			dev_err(phy->dev, "Failed to enable power\n");
	}

	if (!IS_ERR(nop->clk)) {
		ret = clk_prepare_enable(nop->clk);
		if (ret)
			return ret;
	}

	nop_reset(nop);

	return 0;
}
EXPORT_SYMBOL_GPL(usb_gen_phy_init);

void usb_gen_phy_shutdown(struct usb_phy *phy)
{
	struct usb_phy_generic *nop = dev_get_drvdata(phy->dev);

	gpiod_set_value(nop->gpiod_reset, 1);

	if (!IS_ERR(nop->clk))
		clk_disable_unprepare(nop->clk);

	if (!IS_ERR(nop->vcc)) {
		if (regulator_disable(nop->vcc))
			dev_err(phy->dev, "Failed to disable power\n");
	}
}
EXPORT_SYMBOL_GPL(usb_gen_phy_shutdown);

static int nop_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
{
	if (!otg)
		return -ENODEV;

	if (!gadget) {
		otg->gadget = NULL;
		return -ENODEV;
	}

	otg->gadget = gadget;
	if (otg->state == OTG_STATE_B_PERIPHERAL)
		atomic_notifier_call_chain(&otg->usb_phy->notifier,
					   USB_EVENT_VBUS, otg->gadget);
	else
		otg->state = OTG_STATE_B_IDLE;
	return 0;
}

static int nop_set_host(struct usb_otg *otg, struct usb_bus *host)
{
	if (!otg)
		return -ENODEV;

	if (!host) {
		otg->host = NULL;
		return -ENODEV;
	}

	otg->host = host;
	return 0;
}

int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop,
		struct usb_phy_generic_platform_data *pdata)
{
	enum usb_phy_type type = USB_PHY_TYPE_USB2;
	int err = 0;

	u32 clk_rate = 0;
	bool needs_vcc = false;

	if (dev->of_node) {
		struct device_node *node = dev->of_node;

		if (of_property_read_u32(node, "clock-frequency", &clk_rate))
			clk_rate = 0;

		needs_vcc = of_property_read_bool(node, "vcc-supply");
		nop->gpiod_reset = devm_gpiod_get_optional(dev, "reset",
							   GPIOD_ASIS);
		err = PTR_ERR_OR_ZERO(nop->gpiod_reset);
		if (!err) {
			nop->gpiod_vbus = devm_gpiod_get_optional(dev,
							 "vbus-detect",
							 GPIOD_ASIS);
			err = PTR_ERR_OR_ZERO(nop->gpiod_vbus);
		}
	} else if (pdata) {
		type = pdata->type;
		clk_rate = pdata->clk_rate;
		needs_vcc = pdata->needs_vcc;
		if (gpio_is_valid(pdata->gpio_reset)) {
			err = devm_gpio_request_one(dev, pdata->gpio_reset,
						    GPIOF_ACTIVE_LOW,
						    dev_name(dev));
			if (!err)
				nop->gpiod_reset =
					gpio_to_desc(pdata->gpio_reset);
		}
		nop->gpiod_vbus = pdata->gpiod_vbus;
	}

	if (err == -EPROBE_DEFER)
		return -EPROBE_DEFER;
	if (err) {
		dev_err(dev, "Error requesting RESET or VBUS GPIO\n");
		return err;
	}
	if (nop->gpiod_reset)
		gpiod_direction_output(nop->gpiod_reset, 1);

	nop->phy.otg = devm_kzalloc(dev, sizeof(*nop->phy.otg),
			GFP_KERNEL);
	if (!nop->phy.otg)
		return -ENOMEM;

	nop->clk = devm_clk_get(dev, "main_clk");
	if (IS_ERR(nop->clk)) {
		dev_dbg(dev, "Can't get phy clock: %ld\n",
					PTR_ERR(nop->clk));
	}

	if (!IS_ERR(nop->clk) && clk_rate) {
		err = clk_set_rate(nop->clk, clk_rate);
		if (err) {
			dev_err(dev, "Error setting clock rate\n");
			return err;
		}
	}

	nop->vcc = devm_regulator_get(dev, "vcc");
	if (IS_ERR(nop->vcc)) {
		dev_dbg(dev, "Error getting vcc regulator: %ld\n",
					PTR_ERR(nop->vcc));
		if (needs_vcc)
			return -EPROBE_DEFER;
	}

	nop->dev		= dev;
	nop->phy.dev		= nop->dev;
	nop->phy.label		= "nop-xceiv";
	nop->phy.set_suspend	= nop_set_suspend;
	nop->phy.type		= type;

	nop->phy.otg->state		= OTG_STATE_UNDEFINED;
	nop->phy.otg->usb_phy		= &nop->phy;
	nop->phy.otg->set_host		= nop_set_host;
	nop->phy.otg->set_peripheral	= nop_set_peripheral;

	return 0;
}
EXPORT_SYMBOL_GPL(usb_phy_gen_create_phy);

static int usb_phy_generic_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct usb_phy_generic	*nop;
	int err;

	nop = devm_kzalloc(dev, sizeof(*nop), GFP_KERNEL);
	if (!nop)
		return -ENOMEM;

	err = usb_phy_gen_create_phy(dev, nop, dev_get_platdata(&pdev->dev));
	if (err)
		return err;
	if (nop->gpiod_vbus) {
		err = devm_request_threaded_irq(&pdev->dev,
						gpiod_to_irq(nop->gpiod_vbus),
						NULL, nop_gpio_vbus_thread,
						VBUS_IRQ_FLAGS, "vbus_detect",
						nop);
		if (err) {
			dev_err(&pdev->dev, "can't request irq %i, err: %d\n",
				gpiod_to_irq(nop->gpiod_vbus), err);
			return err;
		}
		nop->phy.otg->state = gpiod_get_value(nop->gpiod_vbus) ?
			OTG_STATE_B_PERIPHERAL : OTG_STATE_B_IDLE;
	}

	nop->phy.init		= usb_gen_phy_init;
	nop->phy.shutdown	= usb_gen_phy_shutdown;

	err = usb_add_phy_dev(&nop->phy);
	if (err) {
		dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
			err);
		return err;
	}

	platform_set_drvdata(pdev, nop);

	return 0;
}

static int usb_phy_generic_remove(struct platform_device *pdev)
{
	struct usb_phy_generic *nop = platform_get_drvdata(pdev);

	usb_remove_phy(&nop->phy);

	return 0;
}

static const struct of_device_id nop_xceiv_dt_ids[] = {
	{ .compatible = "usb-nop-xceiv" },
	{ }
};

MODULE_DEVICE_TABLE(of, nop_xceiv_dt_ids);

static struct platform_driver usb_phy_generic_driver = {
	.probe		= usb_phy_generic_probe,
	.remove		= usb_phy_generic_remove,
	.driver		= {
		.name	= "usb_phy_generic",
		.of_match_table = nop_xceiv_dt_ids,
	},
};

static int __init usb_phy_generic_init(void)
{
	return platform_driver_register(&usb_phy_generic_driver);
}
subsys_initcall(usb_phy_generic_init);

static void __exit usb_phy_generic_exit(void)
{
	platform_driver_unregister(&usb_phy_generic_driver);
}
module_exit(usb_phy_generic_exit);

MODULE_ALIAS("platform:usb_phy_generic");
MODULE_AUTHOR("Texas Instruments Inc");
MODULE_DESCRIPTION("NOP USB Transceiver driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
f6d92a05	1	/*
f6d92a05 AKG	2	* NOP USB transceiver for all USB transceiver which are either built-in
	3	* into USB IP or which are mostly autonomous.
	4	*
	5	* Copyright (C) 2009 Texas Instruments Inc
	6	* Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	21	*
	22	* Current status:
cc835e32 DB	23	* This provides a "nop" transceiver for PHYs which are
cc835e32 DB	24	* autonomous such as isp1504, isp1707, etc.
f6d92a05 AKG	25	*/
	26
	27	#include <linux/module.h>
	28	#include <linux/platform_device.h>
	29	#include <linux/dma-mapping.h>
7acc9973	30	#include <linux/usb/gadget.h>
f6d92a05	31	#include <linux/usb/otg.h>
d7078df6	32	#include <linux/usb/usb_phy_generic.h>
5a0e3ad6	33	#include <linux/slab.h>
2319fb88	34	#include <linux/clk.h>
58f735fe	35	#include <linux/regulator/consumer.h>
0eba3879	36	#include <linux/of.h>
bd27fa44 RQ	37	#include <linux/of_gpio.h>
	38	#include <linux/gpio.h>
	39	#include <linux/delay.h>
f6d92a05	40
53b6fc28	41	#include "phy-generic.h"
f6d92a05	42
7acc9973	43	#define VBUS_IRQ_FLAGS \
0f4ff5f1 RJ	44	(IRQF_SHARED \| IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING \| \
0f4ff5f1 RJ	45	IRQF_ONESHOT)
7acc9973	46
2f36ff69	47	struct platform_device *usb_phy_generic_register(void)
f6d92a05	48	{
2f36ff69 FB	49	return platform_device_register_simple("usb_phy_generic",
2f36ff69 FB	50	PLATFORM_DEVID_AUTO, NULL, 0);
f6d92a05	51	}
4525beeb	52	EXPORT_SYMBOL_GPL(usb_phy_generic_register);
f6d92a05	53
2f36ff69	54	void usb_phy_generic_unregister(struct platform_device *pdev)
f6d92a05	55	{
2f36ff69	56	platform_device_unregister(pdev);
f6d92a05	57	}
4525beeb	58	EXPORT_SYMBOL_GPL(usb_phy_generic_unregister);
f6d92a05	59
86753811	60	static int nop_set_suspend(struct usb_phy *x, int suspend)
f6d92a05	61	{
a0fe0415 PC	62	struct usb_phy_generic *nop = dev_get_drvdata(x->dev);
	63
	64	if (!IS_ERR(nop->clk)) {
	65	if (suspend)
	66	clk_disable_unprepare(nop->clk);
	67	else
	68	clk_prepare_enable(nop->clk);
	69	}
	70
f6d92a05 AKG	71	return 0;
	72	}
	73
168bdb88	74	static void nop_reset(struct usb_phy_generic *nop)
bd27fa44	75	{
74379991 FE	76	if (!nop->gpiod_reset)
74379991 FE	77	return;
bd27fa44	78
168bdb88	79	gpiod_set_value(nop->gpiod_reset, 1);
74379991	80	usleep_range(10000, 20000);
168bdb88	81	gpiod_set_value(nop->gpiod_reset, 0);
bd27fa44 RQ	82	}
bd27fa44 RQ	83
7acc9973 RJ	84	/* interface to regulator framework */
	85	static void nop_set_vbus_draw(struct usb_phy_generic *nop, unsigned mA)
	86	{
	87	struct regulator *vbus_draw = nop->vbus_draw;
	88	int enabled;
	89	int ret;
	90
	91	if (!vbus_draw)
	92	return;
	93
	94	enabled = nop->vbus_draw_enabled;
	95	if (mA) {
	96	regulator_set_current_limit(vbus_draw, 0, 1000 * mA);
	97	if (!enabled) {
	98	ret = regulator_enable(vbus_draw);
	99	if (ret < 0)
	100	return;
	101	nop->vbus_draw_enabled = 1;
	102	}
	103	} else {
	104	if (enabled) {
	105	ret = regulator_disable(vbus_draw);
	106	if (ret < 0)
	107	return;
	108	nop->vbus_draw_enabled = 0;
	109	}
	110	}
	111	nop->mA = mA;
	112	}
	113
	114
	115	static irqreturn_t nop_gpio_vbus_thread(int irq, void *data)
	116	{
	117	struct usb_phy_generic *nop = data;
	118	struct usb_otg *otg = nop->phy.otg;
	119	int vbus, status;
	120
	121	vbus = gpiod_get_value(nop->gpiod_vbus);
	122	if ((vbus ^ nop->vbus) == 0)
	123	return IRQ_HANDLED;
	124	nop->vbus = vbus;
	125
	126	if (vbus) {
	127	status = USB_EVENT_VBUS;
	128	otg->state = OTG_STATE_B_PERIPHERAL;
	129	nop->phy.last_event = status;
7acc9973 RJ	130
	131	/* drawing a "unit load" is always OK, except for OTG */
	132	nop_set_vbus_draw(nop, 100);
	133
	134	atomic_notifier_call_chain(&nop->phy.notifier, status,
	135	otg->gadget);
	136	} else {
	137	nop_set_vbus_draw(nop, 0);
	138
7acc9973 RJ	139	status = USB_EVENT_NONE;
	140	otg->state = OTG_STATE_B_IDLE;
	141	nop->phy.last_event = status;
	142
	143	atomic_notifier_call_chain(&nop->phy.notifier, status,
	144	otg->gadget);
	145	}
	146	return IRQ_HANDLED;
	147	}
	148
53b6fc28	149	int usb_gen_phy_init(struct usb_phy *phy)
2319fb88	150	{
4525beeb	151	struct usb_phy_generic *nop = dev_get_drvdata(phy->dev);
7c113f7d	152	int ret;
2319fb88	153
58f735fe RQ	154	if (!IS_ERR(nop->vcc)) {
	155	if (regulator_enable(nop->vcc))
	156	dev_err(phy->dev, "Failed to enable power\n");
	157	}
	158
7c113f7d FE	159	if (!IS_ERR(nop->clk)) {
	160	ret = clk_prepare_enable(nop->clk);
	161	if (ret)
	162	return ret;
	163	}
2319fb88	164
168bdb88	165	nop_reset(nop);
ad63ebfc	166
2319fb88 RQ	167	return 0;
2319fb88 RQ	168	}
53b6fc28	169	EXPORT_SYMBOL_GPL(usb_gen_phy_init);
2319fb88	170
53b6fc28	171	void usb_gen_phy_shutdown(struct usb_phy *phy)
2319fb88	172	{
4525beeb	173	struct usb_phy_generic *nop = dev_get_drvdata(phy->dev);
2319fb88	174
168bdb88	175	gpiod_set_value(nop->gpiod_reset, 1);
ad63ebfc	176
2319fb88	177	if (!IS_ERR(nop->clk))
4d175f34	178	clk_disable_unprepare(nop->clk);
58f735fe RQ	179
	180	if (!IS_ERR(nop->vcc)) {
	181	if (regulator_disable(nop->vcc))
	182	dev_err(phy->dev, "Failed to disable power\n");
	183	}
2319fb88	184	}
53b6fc28	185	EXPORT_SYMBOL_GPL(usb_gen_phy_shutdown);
2319fb88	186
41adf109	187	static int nop_set_peripheral(struct usb_otg otg, struct usb_gadget gadget)
f6d92a05	188	{
41adf109	189	if (!otg)
f6d92a05 AKG	190	return -ENODEV;
f6d92a05 AKG	191
f6d92a05	192	if (!gadget) {
41adf109	193	otg->gadget = NULL;
f6d92a05 AKG	194	return -ENODEV;
	195	}
	196
41adf109	197	otg->gadget = gadget;
2eafe93b	198	if (otg->state == OTG_STATE_B_PERIPHERAL)
77e012ac RJ	199	atomic_notifier_call_chain(&otg->usb_phy->notifier,
77e012ac RJ	200	USB_EVENT_VBUS, otg->gadget);
2eafe93b MH	201	else
2eafe93b MH	202	otg->state = OTG_STATE_B_IDLE;
f6d92a05 AKG	203	return 0;
	204	}
	205
41adf109	206	static int nop_set_host(struct usb_otg otg, struct usb_bus host)
f6d92a05	207	{
41adf109	208	if (!otg)
f6d92a05 AKG	209	return -ENODEV;
f6d92a05 AKG	210
f6d92a05	211	if (!host) {
41adf109	212	otg->host = NULL;
f6d92a05 AKG	213	return -ENODEV;
	214	}
	215
41adf109	216	otg->host = host;
f6d92a05 AKG	217	return 0;
	218	}
	219
4525beeb FB	220	int usb_phy_gen_create_phy(struct device dev, struct usb_phy_generic nop,
4525beeb FB	221	struct usb_phy_generic_platform_data *pdata)
f6d92a05	222	{
af9f51c5	223	enum usb_phy_type type = USB_PHY_TYPE_USB2;
e9f2cefb	224	int err = 0;
f6d92a05	225
af9f51c5 FB	226	u32 clk_rate = 0;
	227	bool needs_vcc = false;
	228
af9f51c5 FB	229	if (dev->of_node) {
af9f51c5 FB	230	struct device_node *node = dev->of_node;
af9f51c5 FB	231
	232	if (of_property_read_u32(node, "clock-frequency", &clk_rate))
	233	clk_rate = 0;
	234
	235	needs_vcc = of_property_read_bool(node, "vcc-supply");
88167fc0 UKK	236	nop->gpiod_reset = devm_gpiod_get_optional(dev, "reset",
88167fc0 UKK	237	GPIOD_ASIS);
9eb07977	238	err = PTR_ERR_OR_ZERO(nop->gpiod_reset);
7acc9973	239	if (!err) {
da89dba1	240	nop->gpiod_vbus = devm_gpiod_get_optional(dev,
88167fc0 UKK	241	"vbus-detect",
88167fc0 UKK	242	GPIOD_ASIS);
9eb07977	243	err = PTR_ERR_OR_ZERO(nop->gpiod_vbus);
7acc9973	244	}
af9f51c5 FB	245	} else if (pdata) {
	246	type = pdata->type;
	247	clk_rate = pdata->clk_rate;
	248	needs_vcc = pdata->needs_vcc;
7acc9973	249	if (gpio_is_valid(pdata->gpio_reset)) {
762982db RQ	250	err = devm_gpio_request_one(dev, pdata->gpio_reset,
762982db RQ	251	GPIOF_ACTIVE_LOW,
e9f2cefb RJ	252	dev_name(dev));
	253	if (!err)
	254	nop->gpiod_reset =
	255	gpio_to_desc(pdata->gpio_reset);
	256	}
7acc9973	257	nop->gpiod_vbus = pdata->gpiod_vbus;
e9f2cefb RJ	258	}
	259
	260	if (err == -EPROBE_DEFER)
	261	return -EPROBE_DEFER;
	262	if (err) {
9eb07977	263	dev_err(dev, "Error requesting RESET or VBUS GPIO\n");
e9f2cefb	264	return err;
af9f51c5	265	}
9eb07977 RJ	266	if (nop->gpiod_reset)
9eb07977 RJ	267	gpiod_direction_output(nop->gpiod_reset, 1);
af9f51c5	268
53b6fc28 SAS	269	nop->phy.otg = devm_kzalloc(dev, sizeof(*nop->phy.otg),
53b6fc28 SAS	270	GFP_KERNEL);
e4d7dc66	271	if (!nop->phy.otg)
41adf109	272	return -ENOMEM;
41adf109	273
53b6fc28	274	nop->clk = devm_clk_get(dev, "main_clk");
2319fb88	275	if (IS_ERR(nop->clk)) {
53b6fc28	276	dev_dbg(dev, "Can't get phy clock: %ld\n",
2319fb88 RQ	277	PTR_ERR(nop->clk));
	278	}
	279
0eba3879 RQ	280	if (!IS_ERR(nop->clk) && clk_rate) {
0eba3879 RQ	281	err = clk_set_rate(nop->clk, clk_rate);
2319fb88	282	if (err) {
53b6fc28	283	dev_err(dev, "Error setting clock rate\n");
2319fb88 RQ	284	return err;
	285	}
	286	}
	287
53b6fc28	288	nop->vcc = devm_regulator_get(dev, "vcc");
58f735fe	289	if (IS_ERR(nop->vcc)) {
53b6fc28	290	dev_dbg(dev, "Error getting vcc regulator: %ld\n",
58f735fe	291	PTR_ERR(nop->vcc));
b54b5f56 RQ	292	if (needs_vcc)
b54b5f56 RQ	293	return -EPROBE_DEFER;
58f735fe RQ	294	}
58f735fe RQ	295
53b6fc28	296	nop->dev = dev;
41adf109 HK	297	nop->phy.dev = nop->dev;
	298	nop->phy.label = "nop-xceiv";
	299	nop->phy.set_suspend = nop_set_suspend;
90f4232f	300	nop->phy.type = type;
41adf109	301
e47d9254	302	nop->phy.otg->state = OTG_STATE_UNDEFINED;
19c1eac2	303	nop->phy.otg->usb_phy = &nop->phy;
41adf109 HK	304	nop->phy.otg->set_host = nop_set_host;
	305	nop->phy.otg->set_peripheral = nop_set_peripheral;
	306
53b6fc28 SAS	307	return 0;
	308	}
	309	EXPORT_SYMBOL_GPL(usb_phy_gen_create_phy);
	310
4525beeb	311	static int usb_phy_generic_probe(struct platform_device *pdev)
53b6fc28 SAS	312	{
53b6fc28 SAS	313	struct device *dev = &pdev->dev;
4525beeb	314	struct usb_phy_generic *nop;
53b6fc28	315	int err;
bd27fa44 RQ	316
	317	nop = devm_kzalloc(dev, sizeof(*nop), GFP_KERNEL);
	318	if (!nop)
	319	return -ENOMEM;
	320
af9f51c5	321	err = usb_phy_gen_create_phy(dev, nop, dev_get_platdata(&pdev->dev));
53b6fc28 SAS	322	if (err)
53b6fc28 SAS	323	return err;
7acc9973 RJ	324	if (nop->gpiod_vbus) {
	325	err = devm_request_threaded_irq(&pdev->dev,
	326	gpiod_to_irq(nop->gpiod_vbus),
	327	NULL, nop_gpio_vbus_thread,
	328	VBUS_IRQ_FLAGS, "vbus_detect",
	329	nop);
	330	if (err) {
	331	dev_err(&pdev->dev, "can't request irq %i, err: %d\n",
	332	gpiod_to_irq(nop->gpiod_vbus), err);
	333	return err;
	334	}
9835a6ef RJ	335	nop->phy.otg->state = gpiod_get_value(nop->gpiod_vbus) ?
9835a6ef RJ	336	OTG_STATE_B_PERIPHERAL : OTG_STATE_B_IDLE;
7acc9973	337	}
53b6fc28 SAS	338
	339	nop->phy.init = usb_gen_phy_init;
	340	nop->phy.shutdown = usb_gen_phy_shutdown;
	341
90f4232f	342	err = usb_add_phy_dev(&nop->phy);
f6d92a05 AKG	343	if (err) {
	344	dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
	345	err);
4d175f34	346	return err;
f6d92a05 AKG	347	}
	348
	349	platform_set_drvdata(pdev, nop);
	350
	351	return 0;
f6d92a05 AKG	352	}
f6d92a05 AKG	353
4525beeb	354	static int usb_phy_generic_remove(struct platform_device *pdev)
f6d92a05	355	{
4525beeb	356	struct usb_phy_generic *nop = platform_get_drvdata(pdev);
f6d92a05	357
662dca54	358	usb_remove_phy(&nop->phy);
f6d92a05	359
f6d92a05 AKG	360	return 0;
	361	}
	362
0eba3879 RQ	363	static const struct of_device_id nop_xceiv_dt_ids[] = {
	364	{ .compatible = "usb-nop-xceiv" },
	365	{ }
	366	};
	367
	368	MODULE_DEVICE_TABLE(of, nop_xceiv_dt_ids);
	369
4525beeb FB	370	static struct platform_driver usb_phy_generic_driver = {
	371	.probe = usb_phy_generic_probe,
	372	.remove = usb_phy_generic_remove,
f6d92a05	373	.driver = {
4525beeb	374	.name = "usb_phy_generic",
5462b0db	375	.of_match_table = nop_xceiv_dt_ids,
f6d92a05 AKG	376	},
	377	};
	378
4525beeb	379	static int __init usb_phy_generic_init(void)
f6d92a05	380	{
4525beeb	381	return platform_driver_register(&usb_phy_generic_driver);
f6d92a05	382	}
4525beeb	383	subsys_initcall(usb_phy_generic_init);
f6d92a05	384
4525beeb	385	static void __exit usb_phy_generic_exit(void)
f6d92a05	386	{
4525beeb	387	platform_driver_unregister(&usb_phy_generic_driver);
f6d92a05	388	}
4525beeb	389	module_exit(usb_phy_generic_exit);
f6d92a05	390
4525beeb	391	MODULE_ALIAS("platform:usb_phy_generic");
f6d92a05 AKG	392	MODULE_AUTHOR("Texas Instruments Inc");
	393	MODULE_DESCRIPTION("NOP USB Transceiver driver");
	394	MODULE_LICENSE("GPL");