[deliverable/linux.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)
{
	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 AKG	61	{
	62	return 0;
	63	}
	64
168bdb88	65	static void nop_reset(struct usb_phy_generic *nop)
bd27fa44	66	{
74379991 FE	67	if (!nop->gpiod_reset)
74379991 FE	68	return;
bd27fa44	69
168bdb88	70	gpiod_set_value(nop->gpiod_reset, 1);
74379991	71	usleep_range(10000, 20000);
168bdb88	72	gpiod_set_value(nop->gpiod_reset, 0);
bd27fa44 RQ	73	}
bd27fa44 RQ	74
7acc9973 RJ	75	/* interface to regulator framework */
	76	static void nop_set_vbus_draw(struct usb_phy_generic *nop, unsigned mA)
	77	{
	78	struct regulator *vbus_draw = nop->vbus_draw;
	79	int enabled;
	80	int ret;
	81
	82	if (!vbus_draw)
	83	return;
	84
	85	enabled = nop->vbus_draw_enabled;
	86	if (mA) {
	87	regulator_set_current_limit(vbus_draw, 0, 1000 * mA);
	88	if (!enabled) {
	89	ret = regulator_enable(vbus_draw);
	90	if (ret < 0)
	91	return;
	92	nop->vbus_draw_enabled = 1;
	93	}
	94	} else {
	95	if (enabled) {
	96	ret = regulator_disable(vbus_draw);
	97	if (ret < 0)
	98	return;
	99	nop->vbus_draw_enabled = 0;
	100	}
	101	}
	102	nop->mA = mA;
	103	}
	104
	105
	106	static irqreturn_t nop_gpio_vbus_thread(int irq, void *data)
	107	{
	108	struct usb_phy_generic *nop = data;
	109	struct usb_otg *otg = nop->phy.otg;
	110	int vbus, status;
	111
	112	vbus = gpiod_get_value(nop->gpiod_vbus);
	113	if ((vbus ^ nop->vbus) == 0)
	114	return IRQ_HANDLED;
	115	nop->vbus = vbus;
	116
	117	if (vbus) {
	118	status = USB_EVENT_VBUS;
	119	otg->state = OTG_STATE_B_PERIPHERAL;
	120	nop->phy.last_event = status;
7acc9973 RJ	121
	122	/* drawing a "unit load" is always OK, except for OTG */
	123	nop_set_vbus_draw(nop, 100);
	124
	125	atomic_notifier_call_chain(&nop->phy.notifier, status,
	126	otg->gadget);
	127	} else {
	128	nop_set_vbus_draw(nop, 0);
	129
7acc9973 RJ	130	status = USB_EVENT_NONE;
	131	otg->state = OTG_STATE_B_IDLE;
	132	nop->phy.last_event = status;
	133
	134	atomic_notifier_call_chain(&nop->phy.notifier, status,
	135	otg->gadget);
	136	}
	137	return IRQ_HANDLED;
	138	}
	139
53b6fc28	140	int usb_gen_phy_init(struct usb_phy *phy)
2319fb88	141	{
4525beeb	142	struct usb_phy_generic *nop = dev_get_drvdata(phy->dev);
7c113f7d	143	int ret;
2319fb88	144
58f735fe RQ	145	if (!IS_ERR(nop->vcc)) {
	146	if (regulator_enable(nop->vcc))
	147	dev_err(phy->dev, "Failed to enable power\n");
	148	}
	149
7c113f7d FE	150	if (!IS_ERR(nop->clk)) {
	151	ret = clk_prepare_enable(nop->clk);
	152	if (ret)
	153	return ret;
	154	}
2319fb88	155
168bdb88	156	nop_reset(nop);
ad63ebfc	157
2319fb88 RQ	158	return 0;
2319fb88 RQ	159	}
53b6fc28	160	EXPORT_SYMBOL_GPL(usb_gen_phy_init);
2319fb88	161
53b6fc28	162	void usb_gen_phy_shutdown(struct usb_phy *phy)
2319fb88	163	{
4525beeb	164	struct usb_phy_generic *nop = dev_get_drvdata(phy->dev);
2319fb88	165
168bdb88	166	gpiod_set_value(nop->gpiod_reset, 1);
ad63ebfc	167
2319fb88	168	if (!IS_ERR(nop->clk))
4d175f34	169	clk_disable_unprepare(nop->clk);
58f735fe RQ	170
	171	if (!IS_ERR(nop->vcc)) {
	172	if (regulator_disable(nop->vcc))
	173	dev_err(phy->dev, "Failed to disable power\n");
	174	}
2319fb88	175	}
53b6fc28	176	EXPORT_SYMBOL_GPL(usb_gen_phy_shutdown);
2319fb88	177
41adf109	178	static int nop_set_peripheral(struct usb_otg otg, struct usb_gadget gadget)
f6d92a05	179	{
41adf109	180	if (!otg)
f6d92a05 AKG	181	return -ENODEV;
f6d92a05 AKG	182
f6d92a05	183	if (!gadget) {
41adf109	184	otg->gadget = NULL;
f6d92a05 AKG	185	return -ENODEV;
	186	}
	187
41adf109	188	otg->gadget = gadget;
2eafe93b	189	if (otg->state == OTG_STATE_B_PERIPHERAL)
77e012ac RJ	190	atomic_notifier_call_chain(&otg->usb_phy->notifier,
77e012ac RJ	191	USB_EVENT_VBUS, otg->gadget);
2eafe93b MH	192	else
2eafe93b MH	193	otg->state = OTG_STATE_B_IDLE;
f6d92a05 AKG	194	return 0;
	195	}
	196
41adf109	197	static int nop_set_host(struct usb_otg otg, struct usb_bus host)
f6d92a05	198	{
41adf109	199	if (!otg)
f6d92a05 AKG	200	return -ENODEV;
f6d92a05 AKG	201
f6d92a05	202	if (!host) {
41adf109	203	otg->host = NULL;
f6d92a05 AKG	204	return -ENODEV;
	205	}
	206
41adf109	207	otg->host = host;
f6d92a05 AKG	208	return 0;
	209	}
	210
4525beeb FB	211	int usb_phy_gen_create_phy(struct device dev, struct usb_phy_generic nop,
4525beeb FB	212	struct usb_phy_generic_platform_data *pdata)
f6d92a05	213	{
af9f51c5	214	enum usb_phy_type type = USB_PHY_TYPE_USB2;
e9f2cefb	215	int err = 0;
f6d92a05	216
af9f51c5 FB	217	u32 clk_rate = 0;
	218	bool needs_vcc = false;
	219
af9f51c5 FB	220	if (dev->of_node) {
af9f51c5 FB	221	struct device_node *node = dev->of_node;
af9f51c5 FB	222
	223	if (of_property_read_u32(node, "clock-frequency", &clk_rate))
	224	clk_rate = 0;
	225
	226	needs_vcc = of_property_read_bool(node, "vcc-supply");
88167fc0 UKK	227	nop->gpiod_reset = devm_gpiod_get_optional(dev, "reset",
88167fc0 UKK	228	GPIOD_ASIS);
9eb07977	229	err = PTR_ERR_OR_ZERO(nop->gpiod_reset);
7acc9973	230	if (!err) {
da89dba1	231	nop->gpiod_vbus = devm_gpiod_get_optional(dev,
88167fc0 UKK	232	"vbus-detect",
88167fc0 UKK	233	GPIOD_ASIS);
9eb07977	234	err = PTR_ERR_OR_ZERO(nop->gpiod_vbus);
7acc9973	235	}
af9f51c5 FB	236	} else if (pdata) {
	237	type = pdata->type;
	238	clk_rate = pdata->clk_rate;
	239	needs_vcc = pdata->needs_vcc;
7acc9973	240	if (gpio_is_valid(pdata->gpio_reset)) {
762982db RQ	241	err = devm_gpio_request_one(dev, pdata->gpio_reset,
762982db RQ	242	GPIOF_ACTIVE_LOW,
e9f2cefb RJ	243	dev_name(dev));
	244	if (!err)
	245	nop->gpiod_reset =
	246	gpio_to_desc(pdata->gpio_reset);
	247	}
7acc9973	248	nop->gpiod_vbus = pdata->gpiod_vbus;
e9f2cefb RJ	249	}
	250
	251	if (err == -EPROBE_DEFER)
	252	return -EPROBE_DEFER;
	253	if (err) {
9eb07977	254	dev_err(dev, "Error requesting RESET or VBUS GPIO\n");
e9f2cefb	255	return err;
af9f51c5	256	}
9eb07977 RJ	257	if (nop->gpiod_reset)
9eb07977 RJ	258	gpiod_direction_output(nop->gpiod_reset, 1);
af9f51c5	259
53b6fc28 SAS	260	nop->phy.otg = devm_kzalloc(dev, sizeof(*nop->phy.otg),
53b6fc28 SAS	261	GFP_KERNEL);
e4d7dc66	262	if (!nop->phy.otg)
41adf109	263	return -ENOMEM;
41adf109	264
53b6fc28	265	nop->clk = devm_clk_get(dev, "main_clk");
2319fb88	266	if (IS_ERR(nop->clk)) {
53b6fc28	267	dev_dbg(dev, "Can't get phy clock: %ld\n",
2319fb88 RQ	268	PTR_ERR(nop->clk));
	269	}
	270
0eba3879 RQ	271	if (!IS_ERR(nop->clk) && clk_rate) {
0eba3879 RQ	272	err = clk_set_rate(nop->clk, clk_rate);
2319fb88	273	if (err) {
53b6fc28	274	dev_err(dev, "Error setting clock rate\n");
2319fb88 RQ	275	return err;
	276	}
	277	}
	278
53b6fc28	279	nop->vcc = devm_regulator_get(dev, "vcc");
58f735fe	280	if (IS_ERR(nop->vcc)) {
53b6fc28	281	dev_dbg(dev, "Error getting vcc regulator: %ld\n",
58f735fe	282	PTR_ERR(nop->vcc));
b54b5f56 RQ	283	if (needs_vcc)
b54b5f56 RQ	284	return -EPROBE_DEFER;
58f735fe RQ	285	}
58f735fe RQ	286
53b6fc28	287	nop->dev = dev;
41adf109 HK	288	nop->phy.dev = nop->dev;
	289	nop->phy.label = "nop-xceiv";
	290	nop->phy.set_suspend = nop_set_suspend;
90f4232f	291	nop->phy.type = type;
41adf109	292
e47d9254	293	nop->phy.otg->state = OTG_STATE_UNDEFINED;
19c1eac2	294	nop->phy.otg->usb_phy = &nop->phy;
41adf109 HK	295	nop->phy.otg->set_host = nop_set_host;
	296	nop->phy.otg->set_peripheral = nop_set_peripheral;
	297
53b6fc28 SAS	298	return 0;
	299	}
	300	EXPORT_SYMBOL_GPL(usb_phy_gen_create_phy);
	301
4525beeb	302	static int usb_phy_generic_probe(struct platform_device *pdev)
53b6fc28 SAS	303	{
53b6fc28 SAS	304	struct device *dev = &pdev->dev;
4525beeb	305	struct usb_phy_generic *nop;
53b6fc28	306	int err;
bd27fa44 RQ	307
	308	nop = devm_kzalloc(dev, sizeof(*nop), GFP_KERNEL);
	309	if (!nop)
	310	return -ENOMEM;
	311
af9f51c5	312	err = usb_phy_gen_create_phy(dev, nop, dev_get_platdata(&pdev->dev));
53b6fc28 SAS	313	if (err)
53b6fc28 SAS	314	return err;
7acc9973 RJ	315	if (nop->gpiod_vbus) {
	316	err = devm_request_threaded_irq(&pdev->dev,
	317	gpiod_to_irq(nop->gpiod_vbus),
	318	NULL, nop_gpio_vbus_thread,
	319	VBUS_IRQ_FLAGS, "vbus_detect",
	320	nop);
	321	if (err) {
	322	dev_err(&pdev->dev, "can't request irq %i, err: %d\n",
	323	gpiod_to_irq(nop->gpiod_vbus), err);
	324	return err;
	325	}
9835a6ef RJ	326	nop->phy.otg->state = gpiod_get_value(nop->gpiod_vbus) ?
9835a6ef RJ	327	OTG_STATE_B_PERIPHERAL : OTG_STATE_B_IDLE;
7acc9973	328	}
53b6fc28 SAS	329
	330	nop->phy.init = usb_gen_phy_init;
	331	nop->phy.shutdown = usb_gen_phy_shutdown;
	332
90f4232f	333	err = usb_add_phy_dev(&nop->phy);
f6d92a05 AKG	334	if (err) {
	335	dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
	336	err);
4d175f34	337	return err;
f6d92a05 AKG	338	}
	339
	340	platform_set_drvdata(pdev, nop);
	341
	342	return 0;
f6d92a05 AKG	343	}
f6d92a05 AKG	344
4525beeb	345	static int usb_phy_generic_remove(struct platform_device *pdev)
f6d92a05	346	{
4525beeb	347	struct usb_phy_generic *nop = platform_get_drvdata(pdev);
f6d92a05	348
662dca54	349	usb_remove_phy(&nop->phy);
f6d92a05	350
f6d92a05 AKG	351	return 0;
	352	}
	353
0eba3879 RQ	354	static const struct of_device_id nop_xceiv_dt_ids[] = {
	355	{ .compatible = "usb-nop-xceiv" },
	356	{ }
	357	};
	358
	359	MODULE_DEVICE_TABLE(of, nop_xceiv_dt_ids);
	360
4525beeb FB	361	static struct platform_driver usb_phy_generic_driver = {
	362	.probe = usb_phy_generic_probe,
	363	.remove = usb_phy_generic_remove,
f6d92a05	364	.driver = {
4525beeb	365	.name = "usb_phy_generic",
5462b0db	366	.of_match_table = nop_xceiv_dt_ids,
f6d92a05 AKG	367	},
	368	};
	369
4525beeb	370	static int __init usb_phy_generic_init(void)
f6d92a05	371	{
4525beeb	372	return platform_driver_register(&usb_phy_generic_driver);
f6d92a05	373	}
4525beeb	374	subsys_initcall(usb_phy_generic_init);
f6d92a05	375
4525beeb	376	static void __exit usb_phy_generic_exit(void)
f6d92a05	377	{
4525beeb	378	platform_driver_unregister(&usb_phy_generic_driver);
f6d92a05	379	}
4525beeb	380	module_exit(usb_phy_generic_exit);
f6d92a05	381
4525beeb	382	MODULE_ALIAS("platform:usb_phy_generic");
f6d92a05 AKG	383	MODULE_AUTHOR("Texas Instruments Inc");
	384	MODULE_DESCRIPTION("NOP USB Transceiver driver");
	385	MODULE_LICENSE("GPL");