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

/*
 * twl6030_usb - TWL6030 USB transceiver, talking to OMAP OTG driver.
 *
 * Copyright (C) 2010 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: Hema HK <hemahk@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.
 *
 * 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.
 *
 */

#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/i2c/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 twl6030_usb_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 = snprintf(buf, PAGE_SIZE, "vbus\n");
	       break;
	case MUSB_ID_GROUND:
	       ret = snprintf(buf, PAGE_SIZE, "id\n");
	       break;
	case MUSB_VBUS_OFF:
	       ret = snprintf(buf, PAGE_SIZE, "none\n");
	       break;
	default:
	       ret = snprintf(buf, PAGE_SIZE, "UNKNOWN\n");
	}
	spin_unlock_irqrestore(&twl->lock, flags);

	return ret;
}
static DEVICE_ATTR(vbus, 0444, twl6030_usb_vbus_show, NULL);

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;

	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);
	if (device_create_file(&pdev->dev, &dev_attr_vbus))
		dev_warn(&pdev->dev, "could not create sysfs file\n");

	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);
		device_remove_file(twl->dev, &dev_attr_vbus);
		return status;
	}

	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);
		free_irq(twl->irq1, twl);
		device_remove_file(twl->dev, &dev_attr_vbus);
		return status;
	}

	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;
}

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

	cancel_delayed_work(&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);
	device_remove_file(twl->dev, &dev_attr_vbus);
	cancel_work_sync(&twl->set_vbus_work);

	return 0;
}

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		= twl6030_usb_remove,
	.driver		= {
		.name	= "twl6030_usb",
		.of_match_table = of_match_ptr(twl6030_usb_id_table),
	},
};

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
c33fad0c HH	1	/*
	2	* twl6030_usb - TWL6030 USB transceiver, talking to OMAP OTG driver.
	3	*
	4	* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* Author: Hema HK <hemahk@ti.com>
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*
	21	*/
	22
	23	#include <linux/module.h>
	24	#include <linux/init.h>
	25	#include <linux/interrupt.h>
	26	#include <linux/platform_device.h>
	27	#include <linux/io.h>
8055555f	28	#include <linux/usb/musb.h>
0e98de67	29	#include <linux/usb/phy_companion.h>
6284be23	30	#include <linux/phy/omap_usb.h>
c33fad0c HH	31	#include <linux/i2c/twl.h>
	32	#include <linux/regulator/consumer.h>
	33	#include <linux/err.h>
c33fad0c	34	#include <linux/slab.h>
603ab524	35	#include <linux/delay.h>
80d7d8a7	36	#include <linux/of.h>
c33fad0c HH	37
	38	/* usb register definitions */
	39	#define USB_VENDOR_ID_LSB 0x00
	40	#define USB_VENDOR_ID_MSB 0x01
	41	#define USB_PRODUCT_ID_LSB 0x02
	42	#define USB_PRODUCT_ID_MSB 0x03
	43	#define USB_VBUS_CTRL_SET 0x04
	44	#define USB_VBUS_CTRL_CLR 0x05
	45	#define USB_ID_CTRL_SET 0x06
	46	#define USB_ID_CTRL_CLR 0x07
	47	#define USB_VBUS_INT_SRC 0x08
	48	#define USB_VBUS_INT_LATCH_SET 0x09
	49	#define USB_VBUS_INT_LATCH_CLR 0x0A
	50	#define USB_VBUS_INT_EN_LO_SET 0x0B
	51	#define USB_VBUS_INT_EN_LO_CLR 0x0C
	52	#define USB_VBUS_INT_EN_HI_SET 0x0D
	53	#define USB_VBUS_INT_EN_HI_CLR 0x0E
	54	#define USB_ID_INT_SRC 0x0F
	55	#define USB_ID_INT_LATCH_SET 0x10
	56	#define USB_ID_INT_LATCH_CLR 0x11
	57
	58	#define USB_ID_INT_EN_LO_SET 0x12
	59	#define USB_ID_INT_EN_LO_CLR 0x13
	60	#define USB_ID_INT_EN_HI_SET 0x14
	61	#define USB_ID_INT_EN_HI_CLR 0x15
	62	#define USB_OTG_ADP_CTRL 0x16
	63	#define USB_OTG_ADP_HIGH 0x17
	64	#define USB_OTG_ADP_LOW 0x18
	65	#define USB_OTG_ADP_RISE 0x19
	66	#define USB_OTG_REVISION 0x1A
	67
	68	/* to be moved to LDO */
	69	#define TWL6030_MISC2 0xE5
	70	#define TWL6030_CFG_LDO_PD2 0xF5
	71	#define TWL6030_BACKUP_REG 0xFA
	72
	73	#define STS_HW_CONDITIONS 0x21
	74
	75	/* In module TWL6030_MODULE_PM_MASTER */
	76	#define STS_HW_CONDITIONS 0x21
	77	#define STS_USB_ID BIT(2)
	78
	79	/* In module TWL6030_MODULE_PM_RECEIVER */
	80	#define VUSB_CFG_TRANS 0x71
	81	#define VUSB_CFG_STATE 0x72
	82	#define VUSB_CFG_VOLTAGE 0x73
	83
	84	/* in module TWL6030_MODULE_MAIN_CHARGE */
	85
	86	#define CHARGERUSB_CTRL1 0x8
	87
	88	#define CONTROLLER_STAT1 0x03
	89	#define VBUS_DET BIT(2)
	90
	91	struct twl6030_usb {
0e98de67	92	struct phy_companion comparator;
c33fad0c HH	93	struct device *dev;
	94
	95	/* for vbus reporting with irqs disabled */
	96	spinlock_t lock;
	97
	98	struct regulator *usb3v3;
	99
b6a619a8 TL	100	/* used to check initial cable status after probe */
	101	struct delayed_work get_status_work;
	102
5bf54506 MS	103	/* used to set vbus, in atomic path */
	104	struct work_struct set_vbus_work;
	105
c33fad0c HH	106	int irq1;
c33fad0c HH	107	int irq2;
8055555f	108	enum musb_vbus_id_status linkstat;
c33fad0c	109	u8 asleep;
5bf54506	110	bool vbus_enable;
c33fad0c HH	111	};
c33fad0c HH	112
0e98de67	113	#define comparator_to_twl(x) container_of((x), struct twl6030_usb, comparator)
c33fad0c HH	114
	115	/-------------------------------------------------------------------------/
	116
	117	static inline int twl6030_writeb(struct twl6030_usb *twl, u8 module,
	118	u8 data, u8 address)
	119	{
	120	int ret = 0;
	121
	122	ret = twl_i2c_write_u8(module, data, address);
	123	if (ret < 0)
	124	dev_err(twl->dev,
	125	"Write[0x%x] Error %d\n", address, ret);
	126	return ret;
	127	}
	128
	129	static inline u8 twl6030_readb(struct twl6030_usb *twl, u8 module, u8 address)
	130	{
0b551490 DC	131	u8 data;
0b551490 DC	132	int ret;
c33fad0c HH	133
	134	ret = twl_i2c_read_u8(module, &data, address);
	135	if (ret >= 0)
	136	ret = data;
	137	else
	138	dev_err(twl->dev,
	139	"readb[0x%x,0x%x] Error %d\n",
	140	module, address, ret);
	141	return ret;
	142	}
	143
0e98de67	144	static int twl6030_start_srp(struct phy_companion *comparator)
c33fad0c	145	{
0e98de67	146	struct twl6030_usb *twl = comparator_to_twl(comparator);
603ab524 HH	147
	148	twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET);
	149	twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET);
	150
	151	mdelay(100);
	152	twl6030_writeb(twl, TWL_MODULE_USB, 0xa0, USB_VBUS_CTRL_CLR);
	153
	154	return 0;
	155	}
	156
c33fad0c HH	157	static int twl6030_usb_ldo_init(struct twl6030_usb *twl)
c33fad0c HH	158	{
c33fad0c	159	/* Set to OTG_REV 1.3 and turn on the ID_WAKEUP_COMP */
13069bd9	160	twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x1, TWL6030_BACKUP_REG);
c33fad0c HH	161
c33fad0c HH	162	/* Program CFG_LDO_PD2 register and set VUSB bit */
13069bd9	163	twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x1, TWL6030_CFG_LDO_PD2);
c33fad0c HH	164
c33fad0c HH	165	/* Program MISC2 register and set bit VUSB_IN_VBAT */
13069bd9	166	twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x10, TWL6030_MISC2);
c33fad0c	167
1ad528db	168	twl->usb3v3 = regulator_get(twl->dev, "usb");
c33fad0c HH	169	if (IS_ERR(twl->usb3v3))
	170	return -ENODEV;
	171
c33fad0c HH	172	/* Program the USB_VBUS_CTRL_SET and set VBUS_ACT_COMP bit */
	173	twl6030_writeb(twl, TWL_MODULE_USB, 0x4, USB_VBUS_CTRL_SET);
	174
	175	/*
	176	* Program the USB_ID_CTRL_SET register to enable GND drive
	177	* and the ID comparators
	178	*/
	179	twl6030_writeb(twl, TWL_MODULE_USB, 0x14, USB_ID_CTRL_SET);
	180
	181	return 0;
	182	}
	183
	184	static ssize_t twl6030_usb_vbus_show(struct device *dev,
	185	struct device_attribute attr, char buf)
	186	{
	187	struct twl6030_usb *twl = dev_get_drvdata(dev);
	188	unsigned long flags;
	189	int ret = -EINVAL;
	190
	191	spin_lock_irqsave(&twl->lock, flags);
	192
	193	switch (twl->linkstat) {
8055555f	194	case MUSB_VBUS_VALID:
c33fad0c HH	195	ret = snprintf(buf, PAGE_SIZE, "vbus\n");
c33fad0c HH	196	break;
8055555f	197	case MUSB_ID_GROUND:
c33fad0c HH	198	ret = snprintf(buf, PAGE_SIZE, "id\n");
c33fad0c HH	199	break;
8055555f	200	case MUSB_VBUS_OFF:
c33fad0c HH	201	ret = snprintf(buf, PAGE_SIZE, "none\n");
	202	break;
	203	default:
	204	ret = snprintf(buf, PAGE_SIZE, "UNKNOWN\n");
	205	}
	206	spin_unlock_irqrestore(&twl->lock, flags);
	207
	208	return ret;
	209	}
	210	static DEVICE_ATTR(vbus, 0444, twl6030_usb_vbus_show, NULL);
	211
	212	static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
	213	{
	214	struct twl6030_usb *twl = _twl;
8055555f	215	enum musb_vbus_id_status status = MUSB_UNKNOWN;
c33fad0c	216	u8 vbus_state, hw_state;
bb54542c	217	int ret;
c33fad0c HH	218
	219	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
	220
	221	vbus_state = twl6030_readb(twl, TWL_MODULE_MAIN_CHARGE,
	222	CONTROLLER_STAT1);
	223	if (!(hw_state & STS_USB_ID)) {
	224	if (vbus_state & VBUS_DET) {
bb54542c FB	225	ret = regulator_enable(twl->usb3v3);
	226	if (ret)
	227	dev_err(twl->dev, "Failed to enable usb3v3\n");
	228
6dc2503b	229	twl->asleep = 1;
8055555f	230	status = MUSB_VBUS_VALID;
6dc2503b	231	twl->linkstat = status;
12b7db2b TL	232	ret = musb_mailbox(status);
	233	if (ret)
	234	twl->linkstat = MUSB_UNKNOWN;
c33fad0c	235	} else {
8055555f TL	236	if (twl->linkstat != MUSB_UNKNOWN) {
8055555f TL	237	status = MUSB_VBUS_OFF;
c9721438	238	twl->linkstat = status;
12b7db2b TL	239	ret = musb_mailbox(status);
	240	if (ret)
	241	twl->linkstat = MUSB_UNKNOWN;
c9721438 KVA	242	if (twl->asleep) {
	243	regulator_disable(twl->usb3v3);
	244	twl->asleep = 0;
	245	}
6dc2503b	246	}
c33fad0c HH	247	}
	248	}
	249	sysfs_notify(&twl->dev->kobj, NULL, "vbus");
	250
	251	return IRQ_HANDLED;
	252	}
	253
	254	static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
	255	{
	256	struct twl6030_usb *twl = _twl;
8055555f	257	enum musb_vbus_id_status status = MUSB_UNKNOWN;
c33fad0c	258	u8 hw_state;
bb54542c	259	int ret;
c33fad0c HH	260
	261	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
	262
	263	if (hw_state & STS_USB_ID) {
bb54542c FB	264	ret = regulator_enable(twl->usb3v3);
	265	if (ret)
	266	dev_err(twl->dev, "Failed to enable usb3v3\n");
c33fad0c	267
6dc2503b	268	twl->asleep = 1;
dc8738d9 MS	269	twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_CLR);
dc8738d9 MS	270	twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_SET);
8055555f	271	status = MUSB_ID_GROUND;
31e9992a	272	twl->linkstat = status;
12b7db2b TL	273	ret = musb_mailbox(status);
	274	if (ret)
	275	twl->linkstat = MUSB_UNKNOWN;
c33fad0c	276	} else {
dc8738d9 MS	277	twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_CLR);
dc8738d9 MS	278	twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
c33fad0c	279	}
dc8738d9	280	twl6030_writeb(twl, TWL_MODULE_USB, status, USB_ID_INT_LATCH_CLR);
c33fad0c HH	281
	282	return IRQ_HANDLED;
	283	}
	284
b6a619a8 TL	285	static void twl6030_status_work(struct work_struct *work)
	286	{
	287	struct twl6030_usb *twl = container_of(work, struct twl6030_usb,
	288	get_status_work.work);
	289
	290	twl6030_usb_irq(twl->irq2, twl);
	291	twl6030_usbotg_irq(twl->irq1, twl);
	292	}
	293
0e98de67	294	static int twl6030_enable_irq(struct twl6030_usb *twl)
c33fad0c	295	{
dc8738d9	296	twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
c33fad0c HH	297	twl6030_interrupt_unmask(0x05, REG_INT_MSK_LINE_C);
	298	twl6030_interrupt_unmask(0x05, REG_INT_MSK_STS_C);
	299
	300	twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
	301	REG_INT_MSK_LINE_C);
	302	twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
	303	REG_INT_MSK_STS_C);
c33fad0c HH	304
	305	return 0;
	306	}
	307
5bf54506	308	static void otg_set_vbus_work(struct work_struct *data)
c33fad0c	309	{
5bf54506 MS	310	struct twl6030_usb *twl = container_of(data, struct twl6030_usb,
5bf54506 MS	311	set_vbus_work);
c33fad0c HH	312
	313	/*
	314	* Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1
	315	* register. This enables boost mode.
	316	*/
5bf54506 MS	317
5bf54506 MS	318	if (twl->vbus_enable)
13069bd9	319	twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE, 0x40,
5bf54506 MS	320	CHARGERUSB_CTRL1);
5bf54506 MS	321	else
13069bd9	322	twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE, 0x00,
5bf54506 MS	323	CHARGERUSB_CTRL1);
	324	}
	325
0e98de67	326	static int twl6030_set_vbus(struct phy_companion *comparator, bool enabled)
5bf54506	327	{
0e98de67	328	struct twl6030_usb *twl = comparator_to_twl(comparator);
5bf54506 MS	329
	330	twl->vbus_enable = enabled;
	331	schedule_work(&twl->set_vbus_work);
	332
c33fad0c HH	333	return 0;
	334	}
	335
41ac7b3a	336	static int twl6030_usb_probe(struct platform_device *pdev)
c33fad0c	337	{
0e98de67	338	u32 ret;
c33fad0c HH	339	struct twl6030_usb *twl;
c33fad0c HH	340	int status, err;
ff0a1f39 KVA	341	struct device_node *np = pdev->dev.of_node;
ff0a1f39 KVA	342	struct device *dev = &pdev->dev;
1ad528db NR	343
	344	if (!np) {
	345	dev_err(dev, "no DT info\n");
	346	return -EINVAL;
	347	}
c33fad0c	348
2ee8ff30	349	twl = devm_kzalloc(dev, sizeof(*twl), GFP_KERNEL);
c33fad0c HH	350	if (!twl)
	351	return -ENOMEM;
	352
	353	twl->dev = &pdev->dev;
	354	twl->irq1 = platform_get_irq(pdev, 0);
	355	twl->irq2 = platform_get_irq(pdev, 1);
8055555f	356	twl->linkstat = MUSB_UNKNOWN;
46b8f6b0	357
0e98de67 KVA	358	twl->comparator.set_vbus = twl6030_set_vbus;
0e98de67 KVA	359	twl->comparator.start_srp = twl6030_start_srp;
46b8f6b0	360
0e98de67 KVA	361	ret = omap_usb2_set_comparator(&twl->comparator);
	362	if (ret == -ENODEV) {
	363	dev_info(&pdev->dev, "phy not ready, deferring probe");
	364	return -EPROBE_DEFER;
	365	}
c33fad0c HH	366
	367	/* init spinlock for workqueue */
	368	spin_lock_init(&twl->lock);
	369
	370	err = twl6030_usb_ldo_init(twl);
	371	if (err) {
	372	dev_err(&pdev->dev, "ldo init failed\n");
c33fad0c HH	373	return err;
c33fad0c HH	374	}
c33fad0c HH	375
	376	platform_set_drvdata(pdev, twl);
	377	if (device_create_file(&pdev->dev, &dev_attr_vbus))
	378	dev_warn(&pdev->dev, "could not create sysfs file\n");
	379
5bf54506	380	INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);
b6a619a8	381	INIT_DELAYED_WORK(&twl->get_status_work, twl6030_status_work);
5bf54506	382
c33fad0c	383	status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
8f9d973a	384	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING \| IRQF_ONESHOT,
c33fad0c HH	385	"twl6030_usb", twl);
	386	if (status < 0) {
	387	dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
	388	twl->irq1, status);
	389	device_remove_file(twl->dev, &dev_attr_vbus);
c33fad0c HH	390	return status;
	391	}
	392
	393	status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq,
8f9d973a	394	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING \| IRQF_ONESHOT,
c33fad0c HH	395	"twl6030_usb", twl);
	396	if (status < 0) {
	397	dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
	398	twl->irq2, status);
	399	free_irq(twl->irq1, twl);
	400	device_remove_file(twl->dev, &dev_attr_vbus);
c33fad0c HH	401	return status;
	402	}
	403
6dc2503b	404	twl->asleep = 0;
0e98de67	405	twl6030_enable_irq(twl);
b6a619a8	406	schedule_delayed_work(&twl->get_status_work, HZ);
c33fad0c HH	407	dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");
	408
	409	return 0;
	410	}
	411
39d35681	412	static int twl6030_usb_remove(struct platform_device *pdev)
c33fad0c HH	413	{
	414	struct twl6030_usb *twl = platform_get_drvdata(pdev);
	415
b6a619a8	416	cancel_delayed_work(&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);
c33fad0c	424	device_remove_file(twl->dev, &dev_attr_vbus);
5bf54506	425	cancel_work_sync(&twl->set_vbus_work);
c33fad0c HH	426
	427	return 0;
	428	}
	429
ff0a1f39 KVA	430	static const struct of_device_id twl6030_usb_id_table[] = {
	431	{ .compatible = "ti,twl6030-usb" },
	432	{}
	433	};
	434	MODULE_DEVICE_TABLE(of, twl6030_usb_id_table);
ff0a1f39	435
c33fad0c HH	436	static struct platform_driver twl6030_usb_driver = {
c33fad0c HH	437	.probe = twl6030_usb_probe,
39d35681	438	.remove = twl6030_usb_remove,
c33fad0c HH	439	.driver = {
c33fad0c HH	440	.name = "twl6030_usb",
ff0a1f39	441	.of_match_table = of_match_ptr(twl6030_usb_id_table),
c33fad0c HH	442	},
	443	};
	444
	445	static int __init twl6030_usb_init(void)
	446	{
	447	return platform_driver_register(&twl6030_usb_driver);
	448	}
	449	subsys_initcall(twl6030_usb_init);
	450
	451	static void __exit twl6030_usb_exit(void)
	452	{
	453	platform_driver_unregister(&twl6030_usb_driver);
	454	}
	455	module_exit(twl6030_usb_exit);
	456
	457	MODULE_ALIAS("platform:twl6030_usb");
	458	MODULE_AUTHOR("Hema HK <hemahk@ti.com>");
	459	MODULE_DESCRIPTION("TWL6030 USB transceiver driver");
	460	MODULE_LICENSE("GPL");