[deliverable/linux.git] / drivers / usb / otg / 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/otg.h>
#include <linux/i2c/twl.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#include <linux/notifier.h>
#include <linux/slab.h>
#include <linux/delay.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 usb_phy		phy;
	struct device		*dev;

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

	struct regulator		*usb3v3;

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

	int			irq1;
	int			irq2;
	u8			linkstat;
	u8			asleep;
	bool			irq_enabled;
	bool			vbus_enable;
	unsigned long		features;
};

#define phy_to_twl(x)		container_of((x), struct twl6030_usb, phy)

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

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, ret = 0;

	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_phy_init(struct usb_phy *x)
{
	struct twl6030_usb *twl;
	struct device *dev;
	struct twl4030_usb_data *pdata;

	twl = phy_to_twl(x);
	dev  = twl->dev;
	pdata = dev->platform_data;

	if (twl->linkstat == USB_EVENT_ID)
		pdata->phy_power(twl->dev, 1, 1);
	else
		pdata->phy_power(twl->dev, 0, 1);

	return 0;
}

static void twl6030_phy_shutdown(struct usb_phy *x)
{
	struct twl6030_usb *twl;
	struct device *dev;
	struct twl4030_usb_data *pdata;

	twl = phy_to_twl(x);
	dev  = twl->dev;
	pdata = dev->platform_data;
	pdata->phy_power(twl->dev, 0, 0);
}

static int twl6030_phy_suspend(struct usb_phy *x, int suspend)
{
	struct twl6030_usb *twl = phy_to_twl(x);
	struct device *dev = twl->dev;
	struct twl4030_usb_data *pdata = dev->platform_data;

	pdata->phy_suspend(dev, suspend);

	return 0;
}

static int twl6030_start_srp(struct usb_otg *otg)
{
	struct twl6030_usb *twl = phy_to_twl(otg->phy);

	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)
{
	char *regulator_name;

	if (twl->features & TWL6025_SUBCLASS)
		regulator_name = "ldousb";
	else
		regulator_name = "vusb";

	/* 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, regulator_name);
	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 USB_EVENT_VBUS:
	       ret = snprintf(buf, PAGE_SIZE, "vbus\n");
	       break;
	case USB_EVENT_ID:
	       ret = snprintf(buf, PAGE_SIZE, "id\n");
	       break;
	case USB_EVENT_NONE:
	       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;
	struct usb_otg *otg = twl->phy.otg;
	int status;
	u8 vbus_state, hw_state;

	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) {
			regulator_enable(twl->usb3v3);
			twl->asleep = 1;
			status = USB_EVENT_VBUS;
			otg->default_a = false;
			twl->phy.state = OTG_STATE_B_IDLE;
			twl->linkstat = status;
			twl->phy.last_event = status;
			atomic_notifier_call_chain(&twl->phy.notifier,
						status, otg->gadget);
		} else {
			status = USB_EVENT_NONE;
			twl->linkstat = status;
			twl->phy.last_event = status;
			atomic_notifier_call_chain(&twl->phy.notifier,
						status, otg->gadget);
			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;
	struct usb_otg *otg = twl->phy.otg;
	int status = USB_EVENT_NONE;
	u8 hw_state;

	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);

	if (hw_state & STS_USB_ID) {

		regulator_enable(twl->usb3v3);
		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 = USB_EVENT_ID;
		otg->default_a = true;
		twl->phy.state = OTG_STATE_A_IDLE;
		twl->linkstat = status;
		twl->phy.last_event = status;
		atomic_notifier_call_chain(&twl->phy.notifier, status,
							otg->gadget);
	} 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 int twl6030_set_peripheral(struct usb_otg *otg,
		struct usb_gadget *gadget)
{
	if (!otg)
		return -ENODEV;

	otg->gadget = gadget;
	if (!gadget)
		otg->phy->state = OTG_STATE_UNDEFINED;

	return 0;
}

static int twl6030_enable_irq(struct usb_phy *x)
{
	struct twl6030_usb *twl = phy_to_twl(x);

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

	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 usb_otg *otg, bool enabled)
{
	struct twl6030_usb *twl = phy_to_twl(otg->phy);

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

	return 0;
}

static int twl6030_set_host(struct usb_otg *otg, struct usb_bus *host)
{
	if (!otg)
		return -ENODEV;

	otg->host = host;
	if (!host)
		otg->phy->state = OTG_STATE_UNDEFINED;
	return 0;
}

static int __devinit twl6030_usb_probe(struct platform_device *pdev)
{
	struct twl6030_usb	*twl;
	int			status, err;
	struct twl4030_usb_data *pdata;
	struct usb_otg		*otg;
	struct device *dev = &pdev->dev;
	pdata = dev->platform_data;

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

	otg = kzalloc(sizeof *otg, GFP_KERNEL);
	if (!otg) {
		kfree(twl);
		return -ENOMEM;
	}

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

	twl->phy.dev		= twl->dev;
	twl->phy.label		= "twl6030";
	twl->phy.otg		= otg;
	twl->phy.init		= twl6030_phy_init;
	twl->phy.shutdown	= twl6030_phy_shutdown;
	twl->phy.set_suspend	= twl6030_phy_suspend;

	otg->phy		= &twl->phy;
	otg->set_host		= twl6030_set_host;
	otg->set_peripheral	= twl6030_set_peripheral;
	otg->set_vbus		= twl6030_set_vbus;
	otg->start_srp		= twl6030_start_srp;

	/* 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");
		kfree(otg);
		kfree(twl);
		return err;
	}
	usb_set_transceiver(&twl->phy);

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

	ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier);

	INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);

	twl->irq_enabled = true;
	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);
		kfree(otg);
		kfree(twl);
		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);
		kfree(otg);
		kfree(twl);
		return status;
	}

	twl->asleep = 0;
	pdata->phy_init(dev);
	twl6030_phy_suspend(&twl->phy, 0);
	twl6030_enable_irq(&twl->phy);
	dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");

	return 0;
}

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

	struct twl4030_usb_data *pdata;
	struct device *dev = &pdev->dev;
	pdata = dev->platform_data;

	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);
	pdata->phy_exit(twl->dev);
	device_remove_file(twl->dev, &dev_attr_vbus);
	cancel_work_sync(&twl->set_vbus_work);
	kfree(twl->phy.otg);
	kfree(twl);

	return 0;
}

static struct platform_driver twl6030_usb_driver = {
	.probe		= twl6030_usb_probe,
	.remove		= __exit_p(twl6030_usb_remove),
	.driver		= {
		.name	= "twl6030_usb",
		.owner	= THIS_MODULE,
	},
};

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>
	28	#include <linux/usb/otg.h>
	29	#include <linux/i2c/twl.h>
	30	#include <linux/regulator/consumer.h>
	31	#include <linux/err.h>
	32	#include <linux/notifier.h>
	33	#include <linux/slab.h>
603ab524	34	#include <linux/delay.h>
c33fad0c HH	35
	36	/* usb register definitions */
	37	#define USB_VENDOR_ID_LSB 0x00
	38	#define USB_VENDOR_ID_MSB 0x01
	39	#define USB_PRODUCT_ID_LSB 0x02
	40	#define USB_PRODUCT_ID_MSB 0x03
	41	#define USB_VBUS_CTRL_SET 0x04
	42	#define USB_VBUS_CTRL_CLR 0x05
	43	#define USB_ID_CTRL_SET 0x06
	44	#define USB_ID_CTRL_CLR 0x07
	45	#define USB_VBUS_INT_SRC 0x08
	46	#define USB_VBUS_INT_LATCH_SET 0x09
	47	#define USB_VBUS_INT_LATCH_CLR 0x0A
	48	#define USB_VBUS_INT_EN_LO_SET 0x0B
	49	#define USB_VBUS_INT_EN_LO_CLR 0x0C
	50	#define USB_VBUS_INT_EN_HI_SET 0x0D
	51	#define USB_VBUS_INT_EN_HI_CLR 0x0E
	52	#define USB_ID_INT_SRC 0x0F
	53	#define USB_ID_INT_LATCH_SET 0x10
	54	#define USB_ID_INT_LATCH_CLR 0x11
	55
	56	#define USB_ID_INT_EN_LO_SET 0x12
	57	#define USB_ID_INT_EN_LO_CLR 0x13
	58	#define USB_ID_INT_EN_HI_SET 0x14
	59	#define USB_ID_INT_EN_HI_CLR 0x15
	60	#define USB_OTG_ADP_CTRL 0x16
	61	#define USB_OTG_ADP_HIGH 0x17
	62	#define USB_OTG_ADP_LOW 0x18
	63	#define USB_OTG_ADP_RISE 0x19
	64	#define USB_OTG_REVISION 0x1A
	65
	66	/* to be moved to LDO */
	67	#define TWL6030_MISC2 0xE5
	68	#define TWL6030_CFG_LDO_PD2 0xF5
	69	#define TWL6030_BACKUP_REG 0xFA
	70
	71	#define STS_HW_CONDITIONS 0x21
	72
	73	/* In module TWL6030_MODULE_PM_MASTER */
	74	#define STS_HW_CONDITIONS 0x21
	75	#define STS_USB_ID BIT(2)
	76
	77	/* In module TWL6030_MODULE_PM_RECEIVER */
	78	#define VUSB_CFG_TRANS 0x71
	79	#define VUSB_CFG_STATE 0x72
	80	#define VUSB_CFG_VOLTAGE 0x73
	81
	82	/* in module TWL6030_MODULE_MAIN_CHARGE */
	83
	84	#define CHARGERUSB_CTRL1 0x8
	85
	86	#define CONTROLLER_STAT1 0x03
	87	#define VBUS_DET BIT(2)
	88
	89	struct twl6030_usb {
46b8f6b0	90	struct usb_phy phy;
c33fad0c HH	91	struct device *dev;
	92
	93	/* for vbus reporting with irqs disabled */
	94	spinlock_t lock;
	95
	96	struct regulator *usb3v3;
	97
5bf54506 MS	98	/* used to set vbus, in atomic path */
	99	struct work_struct set_vbus_work;
	100
c33fad0c HH	101	int irq1;
	102	int irq2;
	103	u8 linkstat;
	104	u8 asleep;
	105	bool irq_enabled;
5bf54506	106	bool vbus_enable;
5ccee4ae	107	unsigned long features;
c33fad0c HH	108	};
c33fad0c HH	109
46b8f6b0	110	#define phy_to_twl(x) container_of((x), struct twl6030_usb, phy)
c33fad0c HH	111
	112	/-------------------------------------------------------------------------/
	113
	114	static inline int twl6030_writeb(struct twl6030_usb *twl, u8 module,
	115	u8 data, u8 address)
	116	{
	117	int ret = 0;
	118
	119	ret = twl_i2c_write_u8(module, data, address);
	120	if (ret < 0)
	121	dev_err(twl->dev,
	122	"Write[0x%x] Error %d\n", address, ret);
	123	return ret;
	124	}
	125
	126	static inline u8 twl6030_readb(struct twl6030_usb *twl, u8 module, u8 address)
	127	{
	128	u8 data, ret = 0;
	129
	130	ret = twl_i2c_read_u8(module, &data, address);
	131	if (ret >= 0)
	132	ret = data;
	133	else
	134	dev_err(twl->dev,
	135	"readb[0x%x,0x%x] Error %d\n",
	136	module, address, ret);
	137	return ret;
	138	}
	139
86753811	140	static int twl6030_phy_init(struct usb_phy *x)
c33fad0c	141	{
c33fad0c HH	142	struct twl6030_usb *twl;
	143	struct device *dev;
	144	struct twl4030_usb_data *pdata;
	145
46b8f6b0	146	twl = phy_to_twl(x);
c33fad0c HH	147	dev = twl->dev;
	148	pdata = dev->platform_data;
	149
31e9992a	150	if (twl->linkstat == USB_EVENT_ID)
c33fad0c HH	151	pdata->phy_power(twl->dev, 1, 1);
	152	else
	153	pdata->phy_power(twl->dev, 0, 1);
	154
	155	return 0;
	156	}
	157
86753811	158	static void twl6030_phy_shutdown(struct usb_phy *x)
c33fad0c HH	159	{
	160	struct twl6030_usb *twl;
	161	struct device *dev;
	162	struct twl4030_usb_data *pdata;
	163
46b8f6b0	164	twl = phy_to_twl(x);
c33fad0c HH	165	dev = twl->dev;
	166	pdata = dev->platform_data;
	167	pdata->phy_power(twl->dev, 0, 0);
c33fad0c HH	168	}
c33fad0c HH	169
86753811	170	static int twl6030_phy_suspend(struct usb_phy *x, int suspend)
070b8ed9	171	{
46b8f6b0	172	struct twl6030_usb *twl = phy_to_twl(x);
070b8ed9 HH	173	struct device *dev = twl->dev;
	174	struct twl4030_usb_data *pdata = dev->platform_data;
	175
	176	pdata->phy_suspend(dev, suspend);
	177
	178	return 0;
	179	}
	180
46b8f6b0	181	static int twl6030_start_srp(struct usb_otg *otg)
603ab524	182	{
46b8f6b0	183	struct twl6030_usb *twl = phy_to_twl(otg->phy);
603ab524 HH	184
	185	twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET);
	186	twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET);
	187
	188	mdelay(100);
	189	twl6030_writeb(twl, TWL_MODULE_USB, 0xa0, USB_VBUS_CTRL_CLR);
	190
	191	return 0;
	192	}
	193
c33fad0c HH	194	static int twl6030_usb_ldo_init(struct twl6030_usb *twl)
c33fad0c HH	195	{
5ccee4ae GG	196	char *regulator_name;
	197
	198	if (twl->features & TWL6025_SUBCLASS)
	199	regulator_name = "ldousb";
	200	else
	201	regulator_name = "vusb";
c33fad0c HH	202
	203	/* Set to OTG_REV 1.3 and turn on the ID_WAKEUP_COMP */
	204	twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_BACKUP_REG);
	205
	206	/* Program CFG_LDO_PD2 register and set VUSB bit */
	207	twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_CFG_LDO_PD2);
	208
	209	/* Program MISC2 register and set bit VUSB_IN_VBAT */
	210	twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x10, TWL6030_MISC2);
	211
5ccee4ae	212	twl->usb3v3 = regulator_get(twl->dev, regulator_name);
c33fad0c HH	213	if (IS_ERR(twl->usb3v3))
	214	return -ENODEV;
	215
c33fad0c HH	216	/* Program the USB_VBUS_CTRL_SET and set VBUS_ACT_COMP bit */
	217	twl6030_writeb(twl, TWL_MODULE_USB, 0x4, USB_VBUS_CTRL_SET);
	218
	219	/*
	220	* Program the USB_ID_CTRL_SET register to enable GND drive
	221	* and the ID comparators
	222	*/
	223	twl6030_writeb(twl, TWL_MODULE_USB, 0x14, USB_ID_CTRL_SET);
	224
	225	return 0;
	226	}
	227
	228	static ssize_t twl6030_usb_vbus_show(struct device *dev,
	229	struct device_attribute attr, char buf)
	230	{
	231	struct twl6030_usb *twl = dev_get_drvdata(dev);
	232	unsigned long flags;
	233	int ret = -EINVAL;
	234
	235	spin_lock_irqsave(&twl->lock, flags);
	236
	237	switch (twl->linkstat) {
	238	case USB_EVENT_VBUS:
	239	ret = snprintf(buf, PAGE_SIZE, "vbus\n");
	240	break;
	241	case USB_EVENT_ID:
	242	ret = snprintf(buf, PAGE_SIZE, "id\n");
	243	break;
	244	case USB_EVENT_NONE:
	245	ret = snprintf(buf, PAGE_SIZE, "none\n");
	246	break;
	247	default:
	248	ret = snprintf(buf, PAGE_SIZE, "UNKNOWN\n");
	249	}
	250	spin_unlock_irqrestore(&twl->lock, flags);
	251
	252	return ret;
	253	}
	254	static DEVICE_ATTR(vbus, 0444, twl6030_usb_vbus_show, NULL);
	255
	256	static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
	257	{
	258	struct twl6030_usb *twl = _twl;
46b8f6b0	259	struct usb_otg *otg = twl->phy.otg;
c33fad0c HH	260	int status;
	261	u8 vbus_state, hw_state;
	262
	263	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
	264
	265	vbus_state = twl6030_readb(twl, TWL_MODULE_MAIN_CHARGE,
	266	CONTROLLER_STAT1);
	267	if (!(hw_state & STS_USB_ID)) {
	268	if (vbus_state & VBUS_DET) {
6dc2503b HH	269	regulator_enable(twl->usb3v3);
6dc2503b HH	270	twl->asleep = 1;
c33fad0c	271	status = USB_EVENT_VBUS;
46b8f6b0 HK	272	otg->default_a = false;
46b8f6b0 HK	273	twl->phy.state = OTG_STATE_B_IDLE;
6dc2503b	274	twl->linkstat = status;
46b8f6b0 HK	275	twl->phy.last_event = status;
	276	atomic_notifier_call_chain(&twl->phy.notifier,
	277	status, otg->gadget);
c33fad0c HH	278	} else {
c33fad0c HH	279	status = USB_EVENT_NONE;
c33fad0c	280	twl->linkstat = status;
46b8f6b0 HK	281	twl->phy.last_event = status;
	282	atomic_notifier_call_chain(&twl->phy.notifier,
	283	status, otg->gadget);
6dc2503b HH	284	if (twl->asleep) {
	285	regulator_disable(twl->usb3v3);
	286	twl->asleep = 0;
	287	}
c33fad0c HH	288	}
	289	}
	290	sysfs_notify(&twl->dev->kobj, NULL, "vbus");
	291
	292	return IRQ_HANDLED;
	293	}
	294
	295	static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
	296	{
	297	struct twl6030_usb *twl = _twl;
46b8f6b0	298	struct usb_otg *otg = twl->phy.otg;
c33fad0c HH	299	int status = USB_EVENT_NONE;
	300	u8 hw_state;
	301
	302	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
	303
	304	if (hw_state & STS_USB_ID) {
	305
6dc2503b HH	306	regulator_enable(twl->usb3v3);
6dc2503b HH	307	twl->asleep = 1;
dc8738d9 MS	308	twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_CLR);
dc8738d9 MS	309	twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_SET);
c33fad0c	310	status = USB_EVENT_ID;
46b8f6b0 HK	311	otg->default_a = true;
46b8f6b0 HK	312	twl->phy.state = OTG_STATE_A_IDLE;
31e9992a	313	twl->linkstat = status;
46b8f6b0 HK	314	twl->phy.last_event = status;
	315	atomic_notifier_call_chain(&twl->phy.notifier, status,
	316	otg->gadget);
c33fad0c	317	} else {
dc8738d9 MS	318	twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_CLR);
dc8738d9 MS	319	twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
c33fad0c	320	}
dc8738d9	321	twl6030_writeb(twl, TWL_MODULE_USB, status, USB_ID_INT_LATCH_CLR);
c33fad0c HH	322
	323	return IRQ_HANDLED;
	324	}
	325
46b8f6b0	326	static int twl6030_set_peripheral(struct usb_otg *otg,
c33fad0c HH	327	struct usb_gadget *gadget)
c33fad0c HH	328	{
46b8f6b0	329	if (!otg)
c33fad0c HH	330	return -ENODEV;
c33fad0c HH	331
46b8f6b0	332	otg->gadget = gadget;
c33fad0c	333	if (!gadget)
46b8f6b0	334	otg->phy->state = OTG_STATE_UNDEFINED;
c33fad0c HH	335
	336	return 0;
	337	}
	338
86753811	339	static int twl6030_enable_irq(struct usb_phy *x)
c33fad0c	340	{
46b8f6b0	341	struct twl6030_usb *twl = phy_to_twl(x);
c33fad0c	342
dc8738d9	343	twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
c33fad0c HH	344	twl6030_interrupt_unmask(0x05, REG_INT_MSK_LINE_C);
	345	twl6030_interrupt_unmask(0x05, REG_INT_MSK_STS_C);
	346
	347	twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
	348	REG_INT_MSK_LINE_C);
	349	twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
	350	REG_INT_MSK_STS_C);
	351	twl6030_usb_irq(twl->irq2, twl);
	352	twl6030_usbotg_irq(twl->irq1, twl);
	353
	354	return 0;
	355	}
	356
5bf54506	357	static void otg_set_vbus_work(struct work_struct *data)
c33fad0c	358	{
5bf54506 MS	359	struct twl6030_usb *twl = container_of(data, struct twl6030_usb,
5bf54506 MS	360	set_vbus_work);
c33fad0c HH	361
	362	/*
	363	* Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1
	364	* register. This enables boost mode.
	365	*/
5bf54506 MS	366
5bf54506 MS	367	if (twl->vbus_enable)
c33fad0c	368	twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x40,
5bf54506 MS	369	CHARGERUSB_CTRL1);
5bf54506 MS	370	else
c33fad0c	371	twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x00,
5bf54506 MS	372	CHARGERUSB_CTRL1);
	373	}
	374
46b8f6b0	375	static int twl6030_set_vbus(struct usb_otg *otg, bool enabled)
5bf54506	376	{
46b8f6b0	377	struct twl6030_usb *twl = phy_to_twl(otg->phy);
5bf54506 MS	378
	379	twl->vbus_enable = enabled;
	380	schedule_work(&twl->set_vbus_work);
	381
c33fad0c HH	382	return 0;
	383	}
	384
46b8f6b0	385	static int twl6030_set_host(struct usb_otg otg, struct usb_bus host)
c33fad0c	386	{
46b8f6b0	387	if (!otg)
c33fad0c HH	388	return -ENODEV;
c33fad0c HH	389
46b8f6b0	390	otg->host = host;
c33fad0c	391	if (!host)
46b8f6b0	392	otg->phy->state = OTG_STATE_UNDEFINED;
c33fad0c HH	393	return 0;
	394	}
	395
	396	static int __devinit twl6030_usb_probe(struct platform_device *pdev)
	397	{
	398	struct twl6030_usb *twl;
	399	int status, err;
	400	struct twl4030_usb_data *pdata;
46b8f6b0	401	struct usb_otg *otg;
c33fad0c HH	402	struct device *dev = &pdev->dev;
	403	pdata = dev->platform_data;
	404
	405	twl = kzalloc(sizeof *twl, GFP_KERNEL);
	406	if (!twl)
	407	return -ENOMEM;
	408
46b8f6b0 HK	409	otg = kzalloc(sizeof *otg, GFP_KERNEL);
	410	if (!otg) {
	411	kfree(twl);
	412	return -ENOMEM;
	413	}
	414
c33fad0c HH	415	twl->dev = &pdev->dev;
	416	twl->irq1 = platform_get_irq(pdev, 0);
	417	twl->irq2 = platform_get_irq(pdev, 1);
5ccee4ae	418	twl->features = pdata->features;
46b8f6b0 HK	419
	420	twl->phy.dev = twl->dev;
	421	twl->phy.label = "twl6030";
	422	twl->phy.otg = otg;
	423	twl->phy.init = twl6030_phy_init;
	424	twl->phy.shutdown = twl6030_phy_shutdown;
	425	twl->phy.set_suspend = twl6030_phy_suspend;
	426
	427	otg->phy = &twl->phy;
	428	otg->set_host = twl6030_set_host;
	429	otg->set_peripheral = twl6030_set_peripheral;
	430	otg->set_vbus = twl6030_set_vbus;
	431	otg->start_srp = twl6030_start_srp;
c33fad0c HH	432
	433	/* init spinlock for workqueue */
	434	spin_lock_init(&twl->lock);
	435
	436	err = twl6030_usb_ldo_init(twl);
	437	if (err) {
	438	dev_err(&pdev->dev, "ldo init failed\n");
46b8f6b0	439	kfree(otg);
c33fad0c HH	440	kfree(twl);
	441	return err;
	442	}
46b8f6b0	443	usb_set_transceiver(&twl->phy);
c33fad0c HH	444
	445	platform_set_drvdata(pdev, twl);
	446	if (device_create_file(&pdev->dev, &dev_attr_vbus))
	447	dev_warn(&pdev->dev, "could not create sysfs file\n");
	448
46b8f6b0	449	ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier);
c33fad0c	450
5bf54506 MS	451	INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);
5bf54506 MS	452
c33fad0c HH	453	twl->irq_enabled = true;
c33fad0c HH	454	status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
8f9d973a	455	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING \| IRQF_ONESHOT,
c33fad0c HH	456	"twl6030_usb", twl);
	457	if (status < 0) {
	458	dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
	459	twl->irq1, status);
	460	device_remove_file(twl->dev, &dev_attr_vbus);
46b8f6b0	461	kfree(otg);
c33fad0c HH	462	kfree(twl);
	463	return status;
	464	}
	465
	466	status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq,
8f9d973a	467	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING \| IRQF_ONESHOT,
c33fad0c HH	468	"twl6030_usb", twl);
	469	if (status < 0) {
	470	dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
	471	twl->irq2, status);
	472	free_irq(twl->irq1, twl);
	473	device_remove_file(twl->dev, &dev_attr_vbus);
46b8f6b0	474	kfree(otg);
c33fad0c HH	475	kfree(twl);
	476	return status;
	477	}
	478
6dc2503b	479	twl->asleep = 0;
c33fad0c	480	pdata->phy_init(dev);
46b8f6b0 HK	481	twl6030_phy_suspend(&twl->phy, 0);
46b8f6b0 HK	482	twl6030_enable_irq(&twl->phy);
c33fad0c HH	483	dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");
	484
	485	return 0;
	486	}
	487
	488	static int __exit twl6030_usb_remove(struct platform_device *pdev)
	489	{
	490	struct twl6030_usb *twl = platform_get_drvdata(pdev);
	491
	492	struct twl4030_usb_data *pdata;
	493	struct device *dev = &pdev->dev;
	494	pdata = dev->platform_data;
	495
	496	twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
	497	REG_INT_MSK_LINE_C);
	498	twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
	499	REG_INT_MSK_STS_C);
	500	free_irq(twl->irq1, twl);
	501	free_irq(twl->irq2, twl);
	502	regulator_put(twl->usb3v3);
	503	pdata->phy_exit(twl->dev);
	504	device_remove_file(twl->dev, &dev_attr_vbus);
5bf54506	505	cancel_work_sync(&twl->set_vbus_work);
46b8f6b0	506	kfree(twl->phy.otg);
c33fad0c HH	507	kfree(twl);
	508
	509	return 0;
	510	}
	511
	512	static struct platform_driver twl6030_usb_driver = {
	513	.probe = twl6030_usb_probe,
	514	.remove = __exit_p(twl6030_usb_remove),
	515	.driver = {
	516	.name = "twl6030_usb",
	517	.owner = THIS_MODULE,
	518	},
	519	};
	520
	521	static int __init twl6030_usb_init(void)
	522	{
	523	return platform_driver_register(&twl6030_usb_driver);
	524	}
	525	subsys_initcall(twl6030_usb_init);
	526
	527	static void __exit twl6030_usb_exit(void)
	528	{
	529	platform_driver_unregister(&twl6030_usb_driver);
	530	}
	531	module_exit(twl6030_usb_exit);
	532
	533	MODULE_ALIAS("platform:twl6030_usb");
	534	MODULE_AUTHOR("Hema HK <hemahk@ti.com>");
	535	MODULE_DESCRIPTION("TWL6030 USB transceiver driver");
	536	MODULE_LICENSE("GPL");