[linux-2.6-block.git] / drivers / usb / phy / phy-twl6030-usb.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * twl6030_usb - TWL6030 USB transceiver, talking to OMAP OTG driver.
 *
 * Copyright (C) 2010 Texas Instruments Incorporated - https://www.ti.com
 *
 * Author: Hema HK <hemahk@ti.com>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/usb/musb.h>
#include <linux/usb/phy_companion.h>
#include <linux/phy/omap_usb.h>
#include <linux/mfd/twl.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/of.h>

/* usb register definitions */
#define USB_VENDOR_ID_LSB		0x00
#define USB_VENDOR_ID_MSB		0x01
#define USB_PRODUCT_ID_LSB		0x02
#define USB_PRODUCT_ID_MSB		0x03
#define USB_VBUS_CTRL_SET		0x04
#define USB_VBUS_CTRL_CLR		0x05
#define USB_ID_CTRL_SET			0x06
#define USB_ID_CTRL_CLR			0x07
#define USB_VBUS_INT_SRC		0x08
#define USB_VBUS_INT_LATCH_SET		0x09
#define USB_VBUS_INT_LATCH_CLR		0x0A
#define USB_VBUS_INT_EN_LO_SET		0x0B
#define USB_VBUS_INT_EN_LO_CLR		0x0C
#define USB_VBUS_INT_EN_HI_SET		0x0D
#define USB_VBUS_INT_EN_HI_CLR		0x0E
#define USB_ID_INT_SRC			0x0F
#define USB_ID_INT_LATCH_SET		0x10
#define USB_ID_INT_LATCH_CLR		0x11

#define USB_ID_INT_EN_LO_SET		0x12
#define USB_ID_INT_EN_LO_CLR		0x13
#define USB_ID_INT_EN_HI_SET		0x14
#define USB_ID_INT_EN_HI_CLR		0x15
#define USB_OTG_ADP_CTRL		0x16
#define USB_OTG_ADP_HIGH		0x17
#define USB_OTG_ADP_LOW			0x18
#define USB_OTG_ADP_RISE		0x19
#define USB_OTG_REVISION		0x1A

/* to be moved to LDO */
#define TWL6030_MISC2			0xE5
#define TWL6030_CFG_LDO_PD2		0xF5
#define TWL6030_BACKUP_REG		0xFA

#define STS_HW_CONDITIONS		0x21

/* In module TWL6030_MODULE_PM_MASTER */
#define STS_HW_CONDITIONS		0x21
#define STS_USB_ID			BIT(2)

/* In module TWL6030_MODULE_PM_RECEIVER */
#define VUSB_CFG_TRANS			0x71
#define VUSB_CFG_STATE			0x72
#define VUSB_CFG_VOLTAGE		0x73

/* in module TWL6030_MODULE_MAIN_CHARGE */

#define CHARGERUSB_CTRL1		0x8

#define CONTROLLER_STAT1		0x03
#define	VBUS_DET			BIT(2)

struct twl6030_usb {
	struct phy_companion	comparator;
	struct device		*dev;

	/* for vbus reporting with irqs disabled */
	spinlock_t		lock;

	struct regulator		*usb3v3;

	/* used to check initial cable status after probe */
	struct delayed_work	get_status_work;

	/* used to set vbus, in atomic path */
	struct work_struct	set_vbus_work;

	int			irq1;
	int			irq2;
	enum musb_vbus_id_status linkstat;
	u8			asleep;
	bool			vbus_enable;
};

#define	comparator_to_twl(x) container_of((x), struct twl6030_usb, comparator)

/*-------------------------------------------------------------------------*/

static inline int twl6030_writeb(struct twl6030_usb *twl, u8 module,
						u8 data, u8 address)
{
	int ret = 0;

	ret = twl_i2c_write_u8(module, data, address);
	if (ret < 0)
		dev_err(twl->dev,
			"Write[0x%x] Error %d\n", address, ret);
	return ret;
}

static inline u8 twl6030_readb(struct twl6030_usb *twl, u8 module, u8 address)
{
	u8 data;
	int ret;

	ret = twl_i2c_read_u8(module, &data, address);
	if (ret >= 0)
		ret = data;
	else
		dev_err(twl->dev,
			"readb[0x%x,0x%x] Error %d\n",
					module, address, ret);
	return ret;
}

static int twl6030_start_srp(struct phy_companion *comparator)
{
	struct twl6030_usb *twl = comparator_to_twl(comparator);

	twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET);
	twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET);

	mdelay(100);
	twl6030_writeb(twl, TWL_MODULE_USB, 0xa0, USB_VBUS_CTRL_CLR);

	return 0;
}

static int twl6030_usb_ldo_init(struct twl6030_usb *twl)
{
	/* Set to OTG_REV 1.3 and turn on the ID_WAKEUP_COMP */
	twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x1, TWL6030_BACKUP_REG);

	/* Program CFG_LDO_PD2 register and set VUSB bit */
	twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x1, TWL6030_CFG_LDO_PD2);

	/* Program MISC2 register and set bit VUSB_IN_VBAT */
	twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x10, TWL6030_MISC2);

	twl->usb3v3 = regulator_get(twl->dev, "usb");
	if (IS_ERR(twl->usb3v3))
		return -ENODEV;

	/* Program the USB_VBUS_CTRL_SET and set VBUS_ACT_COMP bit */
	twl6030_writeb(twl, TWL_MODULE_USB, 0x4, USB_VBUS_CTRL_SET);

	/*
	 * Program the USB_ID_CTRL_SET register to enable GND drive
	 * and the ID comparators
	 */
	twl6030_writeb(twl, TWL_MODULE_USB, 0x14, USB_ID_CTRL_SET);

	return 0;
}

static ssize_t vbus_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	struct twl6030_usb *twl = dev_get_drvdata(dev);
	unsigned long flags;
	int ret = -EINVAL;

	spin_lock_irqsave(&twl->lock, flags);

	switch (twl->linkstat) {
	case MUSB_VBUS_VALID:
	       ret = sysfs_emit(buf, "vbus\n");
	       break;
	case MUSB_ID_GROUND:
	       ret = sysfs_emit(buf, "id\n");
	       break;
	case MUSB_VBUS_OFF:
	       ret = sysfs_emit(buf, "none\n");
	       break;
	default:
	       ret = sysfs_emit(buf, "UNKNOWN\n");
	}
	spin_unlock_irqrestore(&twl->lock, flags);

	return ret;
}
static DEVICE_ATTR_RO(vbus);

static struct attribute *twl6030_attrs[] = {
	&dev_attr_vbus.attr,
	NULL,
};
ATTRIBUTE_GROUPS(twl6030);

static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
{
	struct twl6030_usb *twl = _twl;
	enum musb_vbus_id_status status = MUSB_UNKNOWN;
	u8 vbus_state, hw_state;
	int ret;

	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);

	vbus_state = twl6030_readb(twl, TWL_MODULE_MAIN_CHARGE,
						CONTROLLER_STAT1);
	if (!(hw_state & STS_USB_ID)) {
		if (vbus_state & VBUS_DET) {
			ret = regulator_enable(twl->usb3v3);
			if (ret)
				dev_err(twl->dev, "Failed to enable usb3v3\n");

			twl->asleep = 1;
			status = MUSB_VBUS_VALID;
			twl->linkstat = status;
			ret = musb_mailbox(status);
			if (ret)
				twl->linkstat = MUSB_UNKNOWN;
		} else {
			if (twl->linkstat != MUSB_UNKNOWN) {
				status = MUSB_VBUS_OFF;
				twl->linkstat = status;
				ret = musb_mailbox(status);
				if (ret)
					twl->linkstat = MUSB_UNKNOWN;
				if (twl->asleep) {
					regulator_disable(twl->usb3v3);
					twl->asleep = 0;
				}
			}
		}
	}
	sysfs_notify(&twl->dev->kobj, NULL, "vbus");

	return IRQ_HANDLED;
}

static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
{
	struct twl6030_usb *twl = _twl;
	enum musb_vbus_id_status status = MUSB_UNKNOWN;
	u8 hw_state;
	int ret;

	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);

	if (hw_state & STS_USB_ID) {
		ret = regulator_enable(twl->usb3v3);
		if (ret)
			dev_err(twl->dev, "Failed to enable usb3v3\n");

		twl->asleep = 1;
		twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_CLR);
		twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_SET);
		status = MUSB_ID_GROUND;
		twl->linkstat = status;
		ret = musb_mailbox(status);
		if (ret)
			twl->linkstat = MUSB_UNKNOWN;
	} else  {
		twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_CLR);
		twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
	}
	twl6030_writeb(twl, TWL_MODULE_USB, status, USB_ID_INT_LATCH_CLR);

	return IRQ_HANDLED;
}

static void twl6030_status_work(struct work_struct *work)
{
	struct twl6030_usb *twl = container_of(work, struct twl6030_usb,
					       get_status_work.work);

	twl6030_usb_irq(twl->irq2, twl);
	twl6030_usbotg_irq(twl->irq1, twl);
}

static int twl6030_enable_irq(struct twl6030_usb *twl)
{
	twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
	twl6030_interrupt_unmask(0x05, REG_INT_MSK_LINE_C);
	twl6030_interrupt_unmask(0x05, REG_INT_MSK_STS_C);

	twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
				REG_INT_MSK_LINE_C);
	twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
				REG_INT_MSK_STS_C);

	return 0;
}

static void otg_set_vbus_work(struct work_struct *data)
{
	struct twl6030_usb *twl = container_of(data, struct twl6030_usb,
								set_vbus_work);

	/*
	 * Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1
	 * register. This enables boost mode.
	 */

	if (twl->vbus_enable)
		twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE, 0x40,
							CHARGERUSB_CTRL1);
	else
		twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE, 0x00,
							CHARGERUSB_CTRL1);
}

static int twl6030_set_vbus(struct phy_companion *comparator, bool enabled)
{
	struct twl6030_usb *twl = comparator_to_twl(comparator);

	twl->vbus_enable = enabled;
	schedule_work(&twl->set_vbus_work);

	return 0;
}

static int twl6030_usb_probe(struct platform_device *pdev)
{
	u32 ret;
	struct twl6030_usb	*twl;
	int			status, err;
	struct device_node	*np = pdev->dev.of_node;
	struct device		*dev = &pdev->dev;

	if (!np) {
		dev_err(dev, "no DT info\n");
		return -EINVAL;
	}

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

	twl->dev		= &pdev->dev;
	twl->irq1		= platform_get_irq(pdev, 0);
	twl->irq2		= platform_get_irq(pdev, 1);
	twl->linkstat		= MUSB_UNKNOWN;

	if (twl->irq1 < 0)
		return twl->irq1;
	if (twl->irq2 < 0)
		return twl->irq2;

	twl->comparator.set_vbus	= twl6030_set_vbus;
	twl->comparator.start_srp	= twl6030_start_srp;

	ret = omap_usb2_set_comparator(&twl->comparator);
	if (ret == -ENODEV) {
		dev_info(&pdev->dev, "phy not ready, deferring probe");
		return -EPROBE_DEFER;
	}

	/* init spinlock for workqueue */
	spin_lock_init(&twl->lock);

	err = twl6030_usb_ldo_init(twl);
	if (err) {
		dev_err(&pdev->dev, "ldo init failed\n");
		return err;
	}

	platform_set_drvdata(pdev, twl);

	INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);
	INIT_DELAYED_WORK(&twl->get_status_work, twl6030_status_work);

	status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
			"twl6030_usb", twl);
	if (status < 0) {
		dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
			twl->irq1, status);
		goto err_put_regulator;
	}

	status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq,
			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
			"twl6030_usb", twl);
	if (status < 0) {
		dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
			twl->irq2, status);
		goto err_free_irq1;
	}

	twl->asleep = 0;
	twl6030_enable_irq(twl);
	schedule_delayed_work(&twl->get_status_work, HZ);
	dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");

	return 0;

err_free_irq1:
	free_irq(twl->irq1, twl);
err_put_regulator:
	regulator_put(twl->usb3v3);

	return status;
}

static void twl6030_usb_remove(struct platform_device *pdev)
{
	struct twl6030_usb *twl = platform_get_drvdata(pdev);

	cancel_delayed_work_sync(&twl->get_status_work);
	twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
		REG_INT_MSK_LINE_C);
	twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
			REG_INT_MSK_STS_C);
	free_irq(twl->irq1, twl);
	free_irq(twl->irq2, twl);
	regulator_put(twl->usb3v3);
	cancel_work_sync(&twl->set_vbus_work);
}

static const struct of_device_id twl6030_usb_id_table[] = {
	{ .compatible = "ti,twl6030-usb" },
	{}
};
MODULE_DEVICE_TABLE(of, twl6030_usb_id_table);

static struct platform_driver twl6030_usb_driver = {
	.probe		= twl6030_usb_probe,
	.remove_new	= twl6030_usb_remove,
	.driver		= {
		.name	= "twl6030_usb",
		.of_match_table = of_match_ptr(twl6030_usb_id_table),
		.dev_groups = twl6030_groups,
	},
};

static int __init twl6030_usb_init(void)
{
	return platform_driver_register(&twl6030_usb_driver);
}
subsys_initcall(twl6030_usb_init);

static void __exit twl6030_usb_exit(void)
{
	platform_driver_unregister(&twl6030_usb_driver);
}
module_exit(twl6030_usb_exit);

MODULE_ALIAS("platform:twl6030_usb");
MODULE_AUTHOR("Hema HK <hemahk@ti.com>");
MODULE_DESCRIPTION("TWL6030 USB transceiver driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0+
c33fad0c HH	2	/*
	3	* twl6030_usb - TWL6030 USB transceiver, talking to OMAP OTG driver.
	4	*
36774c5a	5	* Copyright (C) 2010 Texas Instruments Incorporated - https://www.ti.com
c33fad0c HH	6	*
c33fad0c HH	7	* Author: Hema HK <hemahk@ti.com>
c33fad0c HH	8	*/
	9
	10	#include <linux/module.h>
	11	#include <linux/init.h>
	12	#include <linux/interrupt.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/io.h>
8055555f	15	#include <linux/usb/musb.h>
0e98de67	16	#include <linux/usb/phy_companion.h>
6284be23	17	#include <linux/phy/omap_usb.h>
a2054256	18	#include <linux/mfd/twl.h>
c33fad0c HH	19	#include <linux/regulator/consumer.h>
c33fad0c HH	20	#include <linux/err.h>
c33fad0c	21	#include <linux/slab.h>
603ab524	22	#include <linux/delay.h>
80d7d8a7	23	#include <linux/of.h>
c33fad0c HH	24
	25	/* usb register definitions */
	26	#define USB_VENDOR_ID_LSB 0x00
	27	#define USB_VENDOR_ID_MSB 0x01
	28	#define USB_PRODUCT_ID_LSB 0x02
	29	#define USB_PRODUCT_ID_MSB 0x03
	30	#define USB_VBUS_CTRL_SET 0x04
	31	#define USB_VBUS_CTRL_CLR 0x05
	32	#define USB_ID_CTRL_SET 0x06
	33	#define USB_ID_CTRL_CLR 0x07
	34	#define USB_VBUS_INT_SRC 0x08
	35	#define USB_VBUS_INT_LATCH_SET 0x09
	36	#define USB_VBUS_INT_LATCH_CLR 0x0A
	37	#define USB_VBUS_INT_EN_LO_SET 0x0B
	38	#define USB_VBUS_INT_EN_LO_CLR 0x0C
	39	#define USB_VBUS_INT_EN_HI_SET 0x0D
	40	#define USB_VBUS_INT_EN_HI_CLR 0x0E
	41	#define USB_ID_INT_SRC 0x0F
	42	#define USB_ID_INT_LATCH_SET 0x10
	43	#define USB_ID_INT_LATCH_CLR 0x11
	44
	45	#define USB_ID_INT_EN_LO_SET 0x12
	46	#define USB_ID_INT_EN_LO_CLR 0x13
	47	#define USB_ID_INT_EN_HI_SET 0x14
	48	#define USB_ID_INT_EN_HI_CLR 0x15
	49	#define USB_OTG_ADP_CTRL 0x16
	50	#define USB_OTG_ADP_HIGH 0x17
	51	#define USB_OTG_ADP_LOW 0x18
	52	#define USB_OTG_ADP_RISE 0x19
	53	#define USB_OTG_REVISION 0x1A
	54
	55	/* to be moved to LDO */
	56	#define TWL6030_MISC2 0xE5
	57	#define TWL6030_CFG_LDO_PD2 0xF5
	58	#define TWL6030_BACKUP_REG 0xFA
	59
	60	#define STS_HW_CONDITIONS 0x21
	61
	62	/* In module TWL6030_MODULE_PM_MASTER */
	63	#define STS_HW_CONDITIONS 0x21
	64	#define STS_USB_ID BIT(2)
	65
	66	/* In module TWL6030_MODULE_PM_RECEIVER */
	67	#define VUSB_CFG_TRANS 0x71
	68	#define VUSB_CFG_STATE 0x72
	69	#define VUSB_CFG_VOLTAGE 0x73
	70
	71	/* in module TWL6030_MODULE_MAIN_CHARGE */
	72
	73	#define CHARGERUSB_CTRL1 0x8
	74
	75	#define CONTROLLER_STAT1 0x03
	76	#define VBUS_DET BIT(2)
	77
	78	struct twl6030_usb {
0e98de67	79	struct phy_companion comparator;
c33fad0c HH	80	struct device *dev;
	81
	82	/* for vbus reporting with irqs disabled */
	83	spinlock_t lock;
	84
	85	struct regulator *usb3v3;
	86
b6a619a8 TL	87	/* used to check initial cable status after probe */
	88	struct delayed_work get_status_work;
	89
5bf54506 MS	90	/* used to set vbus, in atomic path */
	91	struct work_struct set_vbus_work;
	92
c33fad0c HH	93	int irq1;
c33fad0c HH	94	int irq2;
8055555f	95	enum musb_vbus_id_status linkstat;
c33fad0c	96	u8 asleep;
5bf54506	97	bool vbus_enable;
c33fad0c HH	98	};
c33fad0c HH	99
0e98de67	100	#define comparator_to_twl(x) container_of((x), struct twl6030_usb, comparator)
c33fad0c HH	101
	102	/-------------------------------------------------------------------------/
	103
	104	static inline int twl6030_writeb(struct twl6030_usb *twl, u8 module,
	105	u8 data, u8 address)
	106	{
	107	int ret = 0;
	108
	109	ret = twl_i2c_write_u8(module, data, address);
	110	if (ret < 0)
	111	dev_err(twl->dev,
	112	"Write[0x%x] Error %d\n", address, ret);
	113	return ret;
	114	}
	115
	116	static inline u8 twl6030_readb(struct twl6030_usb *twl, u8 module, u8 address)
	117	{
0b551490 DC	118	u8 data;
0b551490 DC	119	int ret;
c33fad0c HH	120
	121	ret = twl_i2c_read_u8(module, &data, address);
	122	if (ret >= 0)
	123	ret = data;
	124	else
	125	dev_err(twl->dev,
	126	"readb[0x%x,0x%x] Error %d\n",
	127	module, address, ret);
	128	return ret;
	129	}
	130
0e98de67	131	static int twl6030_start_srp(struct phy_companion *comparator)
c33fad0c	132	{
0e98de67	133	struct twl6030_usb *twl = comparator_to_twl(comparator);
603ab524 HH	134
	135	twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET);
	136	twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET);
	137
	138	mdelay(100);
	139	twl6030_writeb(twl, TWL_MODULE_USB, 0xa0, USB_VBUS_CTRL_CLR);
	140
	141	return 0;
	142	}
	143
c33fad0c HH	144	static int twl6030_usb_ldo_init(struct twl6030_usb *twl)
c33fad0c HH	145	{
c33fad0c	146	/* Set to OTG_REV 1.3 and turn on the ID_WAKEUP_COMP */
13069bd9	147	twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x1, TWL6030_BACKUP_REG);
c33fad0c HH	148
c33fad0c HH	149	/* Program CFG_LDO_PD2 register and set VUSB bit */
13069bd9	150	twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x1, TWL6030_CFG_LDO_PD2);
c33fad0c HH	151
c33fad0c HH	152	/* Program MISC2 register and set bit VUSB_IN_VBAT */
13069bd9	153	twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x10, TWL6030_MISC2);
c33fad0c	154
1ad528db	155	twl->usb3v3 = regulator_get(twl->dev, "usb");
c33fad0c HH	156	if (IS_ERR(twl->usb3v3))
	157	return -ENODEV;
	158
c33fad0c HH	159	/* Program the USB_VBUS_CTRL_SET and set VBUS_ACT_COMP bit */
	160	twl6030_writeb(twl, TWL_MODULE_USB, 0x4, USB_VBUS_CTRL_SET);
	161
	162	/*
	163	* Program the USB_ID_CTRL_SET register to enable GND drive
	164	* and the ID comparators
	165	*/
	166	twl6030_writeb(twl, TWL_MODULE_USB, 0x14, USB_ID_CTRL_SET);
	167
	168	return 0;
	169	}
	170
7f26ee4b	171	static ssize_t vbus_show(struct device *dev,
c33fad0c HH	172	struct device_attribute attr, char buf)
	173	{
	174	struct twl6030_usb *twl = dev_get_drvdata(dev);
	175	unsigned long flags;
	176	int ret = -EINVAL;
	177
	178	spin_lock_irqsave(&twl->lock, flags);
	179
	180	switch (twl->linkstat) {
8055555f	181	case MUSB_VBUS_VALID:
e5892ea8	182	ret = sysfs_emit(buf, "vbus\n");
c33fad0c	183	break;
8055555f	184	case MUSB_ID_GROUND:
e5892ea8	185	ret = sysfs_emit(buf, "id\n");
c33fad0c	186	break;
8055555f	187	case MUSB_VBUS_OFF:
e5892ea8	188	ret = sysfs_emit(buf, "none\n");
c33fad0c HH	189	break;
c33fad0c HH	190	default:
e5892ea8	191	ret = sysfs_emit(buf, "UNKNOWN\n");
c33fad0c HH	192	}
	193	spin_unlock_irqrestore(&twl->lock, flags);
	194
	195	return ret;
	196	}
7f26ee4b	197	static DEVICE_ATTR_RO(vbus);
c33fad0c	198
891c1da6 GKH	199	static struct attribute *twl6030_attrs[] = {
	200	&dev_attr_vbus.attr,
	201	NULL,
	202	};
	203	ATTRIBUTE_GROUPS(twl6030);
	204
c33fad0c HH	205	static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
	206	{
	207	struct twl6030_usb *twl = _twl;
8055555f	208	enum musb_vbus_id_status status = MUSB_UNKNOWN;
c33fad0c	209	u8 vbus_state, hw_state;
bb54542c	210	int ret;
c33fad0c HH	211
	212	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
	213
	214	vbus_state = twl6030_readb(twl, TWL_MODULE_MAIN_CHARGE,
	215	CONTROLLER_STAT1);
	216	if (!(hw_state & STS_USB_ID)) {
	217	if (vbus_state & VBUS_DET) {
bb54542c FB	218	ret = regulator_enable(twl->usb3v3);
	219	if (ret)
	220	dev_err(twl->dev, "Failed to enable usb3v3\n");
	221
6dc2503b	222	twl->asleep = 1;
8055555f	223	status = MUSB_VBUS_VALID;
6dc2503b	224	twl->linkstat = status;
12b7db2b TL	225	ret = musb_mailbox(status);
	226	if (ret)
	227	twl->linkstat = MUSB_UNKNOWN;
c33fad0c	228	} else {
8055555f TL	229	if (twl->linkstat != MUSB_UNKNOWN) {
8055555f TL	230	status = MUSB_VBUS_OFF;
c9721438	231	twl->linkstat = status;
12b7db2b TL	232	ret = musb_mailbox(status);
	233	if (ret)
	234	twl->linkstat = MUSB_UNKNOWN;
c9721438 KVA	235	if (twl->asleep) {
	236	regulator_disable(twl->usb3v3);
	237	twl->asleep = 0;
	238	}
6dc2503b	239	}
c33fad0c HH	240	}
	241	}
	242	sysfs_notify(&twl->dev->kobj, NULL, "vbus");
	243
	244	return IRQ_HANDLED;
	245	}
	246
	247	static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
	248	{
	249	struct twl6030_usb *twl = _twl;
8055555f	250	enum musb_vbus_id_status status = MUSB_UNKNOWN;
c33fad0c	251	u8 hw_state;
bb54542c	252	int ret;
c33fad0c HH	253
	254	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
	255
	256	if (hw_state & STS_USB_ID) {
bb54542c FB	257	ret = regulator_enable(twl->usb3v3);
	258	if (ret)
	259	dev_err(twl->dev, "Failed to enable usb3v3\n");
c33fad0c	260
6dc2503b	261	twl->asleep = 1;
dc8738d9 MS	262	twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_CLR);
dc8738d9 MS	263	twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_SET);
8055555f	264	status = MUSB_ID_GROUND;
31e9992a	265	twl->linkstat = status;
12b7db2b TL	266	ret = musb_mailbox(status);
	267	if (ret)
	268	twl->linkstat = MUSB_UNKNOWN;
c33fad0c	269	} else {
dc8738d9 MS	270	twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_CLR);
dc8738d9 MS	271	twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
c33fad0c	272	}
dc8738d9	273	twl6030_writeb(twl, TWL_MODULE_USB, status, USB_ID_INT_LATCH_CLR);
c33fad0c HH	274
	275	return IRQ_HANDLED;
	276	}
	277
b6a619a8 TL	278	static void twl6030_status_work(struct work_struct *work)
	279	{
	280	struct twl6030_usb *twl = container_of(work, struct twl6030_usb,
	281	get_status_work.work);
	282
	283	twl6030_usb_irq(twl->irq2, twl);
	284	twl6030_usbotg_irq(twl->irq1, twl);
	285	}
	286
0e98de67	287	static int twl6030_enable_irq(struct twl6030_usb *twl)
c33fad0c	288	{
dc8738d9	289	twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
c33fad0c HH	290	twl6030_interrupt_unmask(0x05, REG_INT_MSK_LINE_C);
	291	twl6030_interrupt_unmask(0x05, REG_INT_MSK_STS_C);
	292
	293	twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
	294	REG_INT_MSK_LINE_C);
	295	twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
	296	REG_INT_MSK_STS_C);
c33fad0c HH	297
	298	return 0;
	299	}
	300
5bf54506	301	static void otg_set_vbus_work(struct work_struct *data)
c33fad0c	302	{
5bf54506 MS	303	struct twl6030_usb *twl = container_of(data, struct twl6030_usb,
5bf54506 MS	304	set_vbus_work);
c33fad0c HH	305
	306	/*
	307	* Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1
	308	* register. This enables boost mode.
	309	*/
5bf54506 MS	310
5bf54506 MS	311	if (twl->vbus_enable)
13069bd9	312	twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE, 0x40,
5bf54506 MS	313	CHARGERUSB_CTRL1);
5bf54506 MS	314	else
13069bd9	315	twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE, 0x00,
5bf54506 MS	316	CHARGERUSB_CTRL1);
	317	}
	318
0e98de67	319	static int twl6030_set_vbus(struct phy_companion *comparator, bool enabled)
5bf54506	320	{
0e98de67	321	struct twl6030_usb *twl = comparator_to_twl(comparator);
5bf54506 MS	322
	323	twl->vbus_enable = enabled;
	324	schedule_work(&twl->set_vbus_work);
	325
c33fad0c HH	326	return 0;
	327	}
	328
41ac7b3a	329	static int twl6030_usb_probe(struct platform_device *pdev)
c33fad0c	330	{
0e98de67	331	u32 ret;
c33fad0c HH	332	struct twl6030_usb *twl;
c33fad0c HH	333	int status, err;
ff0a1f39 KVA	334	struct device_node *np = pdev->dev.of_node;
ff0a1f39 KVA	335	struct device *dev = &pdev->dev;
1ad528db NR	336
	337	if (!np) {
	338	dev_err(dev, "no DT info\n");
	339	return -EINVAL;
	340	}
c33fad0c	341
2ee8ff30	342	twl = devm_kzalloc(dev, sizeof(*twl), GFP_KERNEL);
c33fad0c HH	343	if (!twl)
	344	return -ENOMEM;
	345
	346	twl->dev = &pdev->dev;
	347	twl->irq1 = platform_get_irq(pdev, 0);
	348	twl->irq2 = platform_get_irq(pdev, 1);
8055555f	349	twl->linkstat = MUSB_UNKNOWN;
46b8f6b0	350
0881e22c SS	351	if (twl->irq1 < 0)
	352	return twl->irq1;
	353	if (twl->irq2 < 0)
	354	return twl->irq2;
	355
0e98de67 KVA	356	twl->comparator.set_vbus = twl6030_set_vbus;
0e98de67 KVA	357	twl->comparator.start_srp = twl6030_start_srp;
46b8f6b0	358
0e98de67 KVA	359	ret = omap_usb2_set_comparator(&twl->comparator);
	360	if (ret == -ENODEV) {
	361	dev_info(&pdev->dev, "phy not ready, deferring probe");
	362	return -EPROBE_DEFER;
	363	}
c33fad0c HH	364
	365	/* init spinlock for workqueue */
	366	spin_lock_init(&twl->lock);
	367
	368	err = twl6030_usb_ldo_init(twl);
	369	if (err) {
	370	dev_err(&pdev->dev, "ldo init failed\n");
c33fad0c HH	371	return err;
c33fad0c HH	372	}
c33fad0c HH	373
c33fad0c HH	374	platform_set_drvdata(pdev, twl);
c33fad0c	375
5bf54506	376	INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);
b6a619a8	377	INIT_DELAYED_WORK(&twl->get_status_work, twl6030_status_work);
5bf54506	378
c33fad0c	379	status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
8f9d973a	380	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING \| IRQF_ONESHOT,
c33fad0c HH	381	"twl6030_usb", twl);
	382	if (status < 0) {
	383	dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
	384	twl->irq1, status);
f058764d	385	goto err_put_regulator;
c33fad0c HH	386	}
	387
	388	status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq,
8f9d973a	389	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING \| IRQF_ONESHOT,
c33fad0c HH	390	"twl6030_usb", twl);
	391	if (status < 0) {
	392	dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
	393	twl->irq2, status);
f058764d	394	goto err_free_irq1;
c33fad0c HH	395	}
c33fad0c HH	396
6dc2503b	397	twl->asleep = 0;
0e98de67	398	twl6030_enable_irq(twl);
b6a619a8	399	schedule_delayed_work(&twl->get_status_work, HZ);
c33fad0c HH	400	dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");
	401
	402	return 0;
f058764d CJ	403
	404	err_free_irq1:
	405	free_irq(twl->irq1, twl);
	406	err_put_regulator:
	407	regulator_put(twl->usb3v3);
	408
	409	return status;
c33fad0c HH	410	}
c33fad0c HH	411
17eb8190	412	static void twl6030_usb_remove(struct platform_device *pdev)
c33fad0c HH	413	{
	414	struct twl6030_usb *twl = platform_get_drvdata(pdev);
	415
5895d311	416	cancel_delayed_work_sync(&twl->get_status_work);
c33fad0c HH	417	twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
	418	REG_INT_MSK_LINE_C);
	419	twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
	420	REG_INT_MSK_STS_C);
	421	free_irq(twl->irq1, twl);
	422	free_irq(twl->irq2, twl);
	423	regulator_put(twl->usb3v3);
5bf54506	424	cancel_work_sync(&twl->set_vbus_work);
c33fad0c HH	425	}
c33fad0c HH	426
ff0a1f39 KVA	427	static const struct of_device_id twl6030_usb_id_table[] = {
	428	{ .compatible = "ti,twl6030-usb" },
	429	{}
	430	};
	431	MODULE_DEVICE_TABLE(of, twl6030_usb_id_table);
ff0a1f39	432
c33fad0c HH	433	static struct platform_driver twl6030_usb_driver = {
c33fad0c HH	434	.probe = twl6030_usb_probe,
17eb8190	435	.remove_new = twl6030_usb_remove,
c33fad0c HH	436	.driver = {
c33fad0c HH	437	.name = "twl6030_usb",
ff0a1f39	438	.of_match_table = of_match_ptr(twl6030_usb_id_table),
891c1da6	439	.dev_groups = twl6030_groups,
c33fad0c HH	440	},
	441	};
	442
	443	static int __init twl6030_usb_init(void)
	444	{
	445	return platform_driver_register(&twl6030_usb_driver);
	446	}
	447	subsys_initcall(twl6030_usb_init);
	448
	449	static void __exit twl6030_usb_exit(void)
	450	{
	451	platform_driver_unregister(&twl6030_usb_driver);
	452	}
	453	module_exit(twl6030_usb_exit);
	454
	455	MODULE_ALIAS("platform:twl6030_usb");
	456	MODULE_AUTHOR("Hema HK <hemahk@ti.com>");
	457	MODULE_DESCRIPTION("TWL6030 USB transceiver driver");
	458	MODULE_LICENSE("GPL");