[linux-2.6-block.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>

/* 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 otg_transceiver	otg;
	struct device		*dev;

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

	struct regulator		*usb3v3;

	int			irq1;
	int			irq2;
	u8			linkstat;
	u8			asleep;
	bool			irq_enabled;
};

#define xceiv_to_twl(x)		container_of((x), struct twl6030_usb, otg);

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

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_set_phy_clk(struct otg_transceiver *x, int on)
{
	struct twl6030_usb *twl;
	struct device *dev;
	struct twl4030_usb_data *pdata;

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

	pdata->phy_set_clock(twl->dev, on);

	return 0;
}

static int twl6030_phy_init(struct otg_transceiver *x)
{
	u8 hw_state;
	struct twl6030_usb *twl;
	struct device *dev;
	struct twl4030_usb_data *pdata;

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

	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);

	if (hw_state & STS_USB_ID)
		pdata->phy_power(twl->dev, 1, 1);
	else
		pdata->phy_power(twl->dev, 0, 1);

	return 0;
}

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

	twl = xceiv_to_twl(x);
	dev  = twl->dev;
	pdata = dev->platform_data;
	pdata->phy_power(twl->dev, 0, 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, "vusb");
	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;
	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;
			twl->otg.default_a = false;
			twl->otg.state = OTG_STATE_B_IDLE;
			twl->linkstat = status;
			blocking_notifier_call_chain(&twl->otg.notifier,
						status, twl->otg.gadget);
		} else {
			status = USB_EVENT_NONE;
			twl->linkstat = status;
			blocking_notifier_call_chain(&twl->otg.notifier,
						status, twl->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;
	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, USB_ID_INT_EN_HI_CLR, 0x1);
		twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_SET,
								0x10);
		status = USB_EVENT_ID;
		twl->otg.default_a = true;
		twl->otg.state = OTG_STATE_A_IDLE;
		blocking_notifier_call_chain(&twl->otg.notifier, status,
							twl->otg.gadget);
	} else  {
		twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_CLR,
								0x10);
		twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_SET,
								0x1);
	}
	twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_LATCH_CLR, status);
	twl->linkstat = status;

	return IRQ_HANDLED;
}

static int twl6030_set_peripheral(struct otg_transceiver *x,
		struct usb_gadget *gadget)
{
	struct twl6030_usb *twl;

	if (!x)
		return -ENODEV;

	twl = xceiv_to_twl(x);
	twl->otg.gadget = gadget;
	if (!gadget)
		twl->otg.state = OTG_STATE_UNDEFINED;

	return 0;
}

static int twl6030_enable_irq(struct otg_transceiver *x)
{
	struct twl6030_usb *twl = xceiv_to_twl(x);

	twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_SET, 0x1);
	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 int twl6030_set_vbus(struct otg_transceiver *x, bool enabled)
{
	struct twl6030_usb *twl = xceiv_to_twl(x);

	/*
	 * Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1
	 * register. This enables boost mode.
	 */
	if (enabled)
		twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x40,
						CHARGERUSB_CTRL1);
	 else
		twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x00,
						CHARGERUSB_CTRL1);
	return 0;
}

static int twl6030_set_host(struct otg_transceiver *x, struct usb_bus *host)
{
	struct twl6030_usb *twl;

	if (!x)
		return -ENODEV;

	twl = xceiv_to_twl(x);
	twl->otg.host = host;
	if (!host)
		twl->otg.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 device *dev = &pdev->dev;
	pdata = dev->platform_data;

	twl = kzalloc(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->otg.dev		= twl->dev;
	twl->otg.label		= "twl6030";
	twl->otg.set_host	= twl6030_set_host;
	twl->otg.set_peripheral	= twl6030_set_peripheral;
	twl->otg.set_vbus	= twl6030_set_vbus;
	twl->otg.init		= twl6030_phy_init;
	twl->otg.shutdown	= twl6030_phy_shutdown;

	/* 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(twl);
		return err;
	}
	otg_set_transceiver(&twl->otg);

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

	BLOCKING_INIT_NOTIFIER_HEAD(&twl->otg.notifier);

	twl->irq_enabled = true;
	status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
			"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(twl);
		return status;
	}

	status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq,
			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
			"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(twl);
		return status;
	}

	twl->asleep = 0;
	pdata->phy_init(dev);
	twl6030_enable_irq(&twl->otg);
	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);
	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>
	34
	35	/* usb register definitions */
	36	#define USB_VENDOR_ID_LSB 0x00
	37	#define USB_VENDOR_ID_MSB 0x01
	38	#define USB_PRODUCT_ID_LSB 0x02
	39	#define USB_PRODUCT_ID_MSB 0x03
	40	#define USB_VBUS_CTRL_SET 0x04
	41	#define USB_VBUS_CTRL_CLR 0x05
	42	#define USB_ID_CTRL_SET 0x06
	43	#define USB_ID_CTRL_CLR 0x07
	44	#define USB_VBUS_INT_SRC 0x08
	45	#define USB_VBUS_INT_LATCH_SET 0x09
	46	#define USB_VBUS_INT_LATCH_CLR 0x0A
	47	#define USB_VBUS_INT_EN_LO_SET 0x0B
	48	#define USB_VBUS_INT_EN_LO_CLR 0x0C
	49	#define USB_VBUS_INT_EN_HI_SET 0x0D
	50	#define USB_VBUS_INT_EN_HI_CLR 0x0E
	51	#define USB_ID_INT_SRC 0x0F
	52	#define USB_ID_INT_LATCH_SET 0x10
	53	#define USB_ID_INT_LATCH_CLR 0x11
	54
	55	#define USB_ID_INT_EN_LO_SET 0x12
	56	#define USB_ID_INT_EN_LO_CLR 0x13
	57	#define USB_ID_INT_EN_HI_SET 0x14
	58	#define USB_ID_INT_EN_HI_CLR 0x15
	59	#define USB_OTG_ADP_CTRL 0x16
	60	#define USB_OTG_ADP_HIGH 0x17
	61	#define USB_OTG_ADP_LOW 0x18
	62	#define USB_OTG_ADP_RISE 0x19
	63	#define USB_OTG_REVISION 0x1A
	64
65	/* to be moved to LDO */
66	#define TWL6030_MISC2 0xE5
67	#define TWL6030_CFG_LDO_PD2 0xF5
68	#define TWL6030_BACKUP_REG 0xFA
69
70	#define STS_HW_CONDITIONS 0x21
71
72	/* In module TWL6030_MODULE_PM_MASTER */
73	#define STS_HW_CONDITIONS 0x21
74	#define STS_USB_ID BIT(2)
75
76	/* In module TWL6030_MODULE_PM_RECEIVER */
77	#define VUSB_CFG_TRANS 0x71
78	#define VUSB_CFG_STATE 0x72
79	#define VUSB_CFG_VOLTAGE 0x73
80
81	/* in module TWL6030_MODULE_MAIN_CHARGE */
82
83	#define CHARGERUSB_CTRL1 0x8
84
85	#define CONTROLLER_STAT1 0x03
86	#define VBUS_DET BIT(2)
87
88	struct twl6030_usb {
89	struct otg_transceiver otg;
90	struct device *dev;
91
92	/* for vbus reporting with irqs disabled */
93	spinlock_t lock;
94
95	struct regulator *usb3v3;
96
97	int irq1;
98	int irq2;
99	u8 linkstat;
100	u8 asleep;
101	bool irq_enabled;
102	};
103
104	#define xceiv_to_twl(x) container_of((x), struct twl6030_usb, otg);
105
106	/-------------------------------------------------------------------------/
107
108	static inline int twl6030_writeb(struct twl6030_usb *twl, u8 module,
109	u8 data, u8 address)
110	{
111	int ret = 0;
112
113	ret = twl_i2c_write_u8(module, data, address);
114	if (ret < 0)
115	dev_err(twl->dev,
116	"Write[0x%x] Error %d\n", address, ret);
117	return ret;
118	}
119
120	static inline u8 twl6030_readb(struct twl6030_usb *twl, u8 module, u8 address)
121	{
122	u8 data, ret = 0;
123
124	ret = twl_i2c_read_u8(module, &data, address);
125	if (ret >= 0)
126	ret = data;
127	else
128	dev_err(twl->dev,
129	"readb[0x%x,0x%x] Error %d\n",
130	module, address, ret);
131	return ret;
132	}
133
134	/-------------------------------------------------------------------------/
135	static int twl6030_set_phy_clk(struct otg_transceiver *x, int on)
136	{
137	struct twl6030_usb *twl;
138	struct device *dev;
139	struct twl4030_usb_data *pdata;
140
141	twl = xceiv_to_twl(x);
142	dev = twl->dev;
143	pdata = dev->platform_data;
144
145	pdata->phy_set_clock(twl->dev, on);
146
147	return 0;
148	}
149
150	static int twl6030_phy_init(struct otg_transceiver *x)
151	{
152	u8 hw_state;
153	struct twl6030_usb *twl;
154	struct device *dev;
155	struct twl4030_usb_data *pdata;
156
157	twl = xceiv_to_twl(x);
158	dev = twl->dev;
159	pdata = dev->platform_data;
160
c33fad0c HH	161	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
	162
	163	if (hw_state & STS_USB_ID)
	164	pdata->phy_power(twl->dev, 1, 1);
	165	else
	166	pdata->phy_power(twl->dev, 0, 1);
	167
	168	return 0;
	169	}
	170
	171	static void twl6030_phy_shutdown(struct otg_transceiver *x)
	172	{
	173	struct twl6030_usb *twl;
	174	struct device *dev;
	175	struct twl4030_usb_data *pdata;
	176
	177	twl = xceiv_to_twl(x);
	178	dev = twl->dev;
	179	pdata = dev->platform_data;
	180	pdata->phy_power(twl->dev, 0, 0);
c33fad0c HH	181	}
	182
	183	static int twl6030_usb_ldo_init(struct twl6030_usb *twl)
	184	{
	185
	186	/* Set to OTG_REV 1.3 and turn on the ID_WAKEUP_COMP */
	187	twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_BACKUP_REG);
	188
	189	/* Program CFG_LDO_PD2 register and set VUSB bit */
	190	twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_CFG_LDO_PD2);
	191
	192	/* Program MISC2 register and set bit VUSB_IN_VBAT */
	193	twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x10, TWL6030_MISC2);
	194
	195	twl->usb3v3 = regulator_get(twl->dev, "vusb");
	196	if (IS_ERR(twl->usb3v3))
	197	return -ENODEV;
	198
c33fad0c HH	199	/* Program the USB_VBUS_CTRL_SET and set VBUS_ACT_COMP bit */
	200	twl6030_writeb(twl, TWL_MODULE_USB, 0x4, USB_VBUS_CTRL_SET);
	201
	202	/*
	203	* Program the USB_ID_CTRL_SET register to enable GND drive
	204	* and the ID comparators
	205	*/
	206	twl6030_writeb(twl, TWL_MODULE_USB, 0x14, USB_ID_CTRL_SET);
	207
	208	return 0;
	209	}
	210
	211	static ssize_t twl6030_usb_vbus_show(struct device *dev,
	212	struct device_attribute attr, char buf)
	213	{
	214	struct twl6030_usb *twl = dev_get_drvdata(dev);
	215	unsigned long flags;
	216	int ret = -EINVAL;
	217
	218	spin_lock_irqsave(&twl->lock, flags);
	219
	220	switch (twl->linkstat) {
	221	case USB_EVENT_VBUS:
	222	ret = snprintf(buf, PAGE_SIZE, "vbus\n");
	223	break;
	224	case USB_EVENT_ID:
	225	ret = snprintf(buf, PAGE_SIZE, "id\n");
	226	break;
	227	case USB_EVENT_NONE:
	228	ret = snprintf(buf, PAGE_SIZE, "none\n");
	229	break;
	230	default:
	231	ret = snprintf(buf, PAGE_SIZE, "UNKNOWN\n");
	232	}
	233	spin_unlock_irqrestore(&twl->lock, flags);
	234
	235	return ret;
	236	}
	237	static DEVICE_ATTR(vbus, 0444, twl6030_usb_vbus_show, NULL);
	238
	239	static irqreturn_t twl6030_usb_irq(int irq, void *_twl)
	240	{
	241	struct twl6030_usb *twl = _twl;
	242	int status;
	243	u8 vbus_state, hw_state;
	244
	245	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
	246
	247	vbus_state = twl6030_readb(twl, TWL_MODULE_MAIN_CHARGE,
	248	CONTROLLER_STAT1);
	249	if (!(hw_state & STS_USB_ID)) {
	250	if (vbus_state & VBUS_DET) {
6dc2503b HH	251	regulator_enable(twl->usb3v3);
6dc2503b HH	252	twl->asleep = 1;
c33fad0c HH	253	status = USB_EVENT_VBUS;
	254	twl->otg.default_a = false;
	255	twl->otg.state = OTG_STATE_B_IDLE;
6dc2503b HH	256	twl->linkstat = status;
	257	blocking_notifier_call_chain(&twl->otg.notifier,
	258	status, twl->otg.gadget);
c33fad0c HH	259	} else {
c33fad0c HH	260	status = USB_EVENT_NONE;
c33fad0c HH	261	twl->linkstat = status;
	262	blocking_notifier_call_chain(&twl->otg.notifier,
	263	status, twl->otg.gadget);
6dc2503b HH	264	if (twl->asleep) {
	265	regulator_disable(twl->usb3v3);
	266	twl->asleep = 0;
	267	}
c33fad0c HH	268	}
	269	}
	270	sysfs_notify(&twl->dev->kobj, NULL, "vbus");
	271
	272	return IRQ_HANDLED;
	273	}
	274
	275	static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
	276	{
	277	struct twl6030_usb *twl = _twl;
	278	int status = USB_EVENT_NONE;
	279	u8 hw_state;
	280
	281	hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
	282
	283	if (hw_state & STS_USB_ID) {
	284
6dc2503b HH	285	regulator_enable(twl->usb3v3);
6dc2503b HH	286	twl->asleep = 1;
c33fad0c HH	287	twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_CLR, 0x1);
	288	twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_SET,
	289	0x10);
	290	status = USB_EVENT_ID;
	291	twl->otg.default_a = true;
	292	twl->otg.state = OTG_STATE_A_IDLE;
	293	blocking_notifier_call_chain(&twl->otg.notifier, status,
	294	twl->otg.gadget);
	295	} else {
	296	twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_CLR,
	297	0x10);
	298	twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_SET,
	299	0x1);
	300	}
	301	twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_LATCH_CLR, status);
	302	twl->linkstat = status;
	303
	304	return IRQ_HANDLED;
	305	}
	306
	307	static int twl6030_set_peripheral(struct otg_transceiver *x,
	308	struct usb_gadget *gadget)
	309	{
	310	struct twl6030_usb *twl;
	311
	312	if (!x)
	313	return -ENODEV;
	314
	315	twl = xceiv_to_twl(x);
	316	twl->otg.gadget = gadget;
	317	if (!gadget)
	318	twl->otg.state = OTG_STATE_UNDEFINED;
	319
	320	return 0;
	321	}
	322
	323	static int twl6030_enable_irq(struct otg_transceiver *x)
	324	{
	325	struct twl6030_usb *twl = xceiv_to_twl(x);
	326
	327	twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_SET, 0x1);
	328	twl6030_interrupt_unmask(0x05, REG_INT_MSK_LINE_C);
	329	twl6030_interrupt_unmask(0x05, REG_INT_MSK_STS_C);
	330
	331	twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
	332	REG_INT_MSK_LINE_C);
	333	twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK,
	334	REG_INT_MSK_STS_C);
	335	twl6030_usb_irq(twl->irq2, twl);
	336	twl6030_usbotg_irq(twl->irq1, twl);
	337
	338	return 0;
	339	}
	340
	341	static int twl6030_set_vbus(struct otg_transceiver *x, bool enabled)
	342	{
	343	struct twl6030_usb *twl = xceiv_to_twl(x);
	344
	345	/*
	346	* Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1
	347	* register. This enables boost mode.
	348	*/
	349	if (enabled)
	350	twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x40,
351	CHARGERUSB_CTRL1);
352	else
353	twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x00,
354	CHARGERUSB_CTRL1);
355	return 0;
356	}
357
358	static int twl6030_set_host(struct otg_transceiver x, struct usb_bus host)
359	{
360	struct twl6030_usb *twl;
361
362	if (!x)
363	return -ENODEV;
364
365	twl = xceiv_to_twl(x);
366	twl->otg.host = host;
367	if (!host)
368	twl->otg.state = OTG_STATE_UNDEFINED;
369	return 0;
370	}
371
372	static int __devinit twl6030_usb_probe(struct platform_device *pdev)
373	{
374	struct twl6030_usb *twl;
375	int status, err;
376	struct twl4030_usb_data *pdata;
377	struct device *dev = &pdev->dev;
378	pdata = dev->platform_data;
379
380	twl = kzalloc(sizeof *twl, GFP_KERNEL);
381	if (!twl)
382	return -ENOMEM;
383
384	twl->dev = &pdev->dev;
385	twl->irq1 = platform_get_irq(pdev, 0);
386	twl->irq2 = platform_get_irq(pdev, 1);
387	twl->otg.dev = twl->dev;
388	twl->otg.label = "twl6030";
389	twl->otg.set_host = twl6030_set_host;
390	twl->otg.set_peripheral = twl6030_set_peripheral;
391	twl->otg.set_vbus = twl6030_set_vbus;
392	twl->otg.init = twl6030_phy_init;
393	twl->otg.shutdown = twl6030_phy_shutdown;
394
395	/* init spinlock for workqueue */
396	spin_lock_init(&twl->lock);
397
398	err = twl6030_usb_ldo_init(twl);
399	if (err) {
400	dev_err(&pdev->dev, "ldo init failed\n");
401	kfree(twl);
402	return err;
403	}
404	otg_set_transceiver(&twl->otg);
405
406	platform_set_drvdata(pdev, twl);
407	if (device_create_file(&pdev->dev, &dev_attr_vbus))
408	dev_warn(&pdev->dev, "could not create sysfs file\n");
409
410	BLOCKING_INIT_NOTIFIER_HEAD(&twl->otg.notifier);
411
412	twl->irq_enabled = true;
413	status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
414	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING,
415	"twl6030_usb", twl);
416	if (status < 0) {
417	dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
418	twl->irq1, status);
419	device_remove_file(twl->dev, &dev_attr_vbus);
420	kfree(twl);
421	return status;
422	}
423
424	status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq,
425	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING,
426	"twl6030_usb", twl);
427	if (status < 0) {
428	dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
429	twl->irq2, status);
430	free_irq(twl->irq1, twl);
431	device_remove_file(twl->dev, &dev_attr_vbus);
432	kfree(twl);
433	return status;
434	}
435
6dc2503b	436	twl->asleep = 0;
c33fad0c HH	437	pdata->phy_init(dev);
	438	twl6030_enable_irq(&twl->otg);
	439	dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");
	440
	441	return 0;
	442	}
	443
	444	static int __exit twl6030_usb_remove(struct platform_device *pdev)
	445	{
	446	struct twl6030_usb *twl = platform_get_drvdata(pdev);
	447
	448	struct twl4030_usb_data *pdata;
	449	struct device *dev = &pdev->dev;
	450	pdata = dev->platform_data;
	451
	452	twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
	453	REG_INT_MSK_LINE_C);
	454	twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
	455	REG_INT_MSK_STS_C);
	456	free_irq(twl->irq1, twl);
	457	free_irq(twl->irq2, twl);
	458	regulator_put(twl->usb3v3);
	459	pdata->phy_exit(twl->dev);
	460	device_remove_file(twl->dev, &dev_attr_vbus);
	461	kfree(twl);
	462
	463	return 0;
	464	}
	465
	466	static struct platform_driver twl6030_usb_driver = {
	467	.probe = twl6030_usb_probe,
	468	.remove = __exit_p(twl6030_usb_remove),
	469	.driver = {
	470	.name = "twl6030_usb",
	471	.owner = THIS_MODULE,
	472	},
	473	};
	474
	475	static int __init twl6030_usb_init(void)
	476	{
	477	return platform_driver_register(&twl6030_usb_driver);
	478	}
	479	subsys_initcall(twl6030_usb_init);
	480
	481	static void __exit twl6030_usb_exit(void)
	482	{
	483	platform_driver_unregister(&twl6030_usb_driver);
	484	}
	485	module_exit(twl6030_usb_exit);
	486
	487	MODULE_ALIAS("platform:twl6030_usb");
	488	MODULE_AUTHOR("Hema HK <hemahk@ti.com>");
	489	MODULE_DESCRIPTION("TWL6030 USB transceiver driver");
	490	MODULE_LICENSE("GPL");