[thirdparty/kernel/stable.git] / drivers / power / lp8727_charger.c

/*
 * Driver for LP8727 Micro/Mini USB IC with integrated charger
 *
 *			Copyright (C) 2011 Texas Instruments
 *			Copyright (C) 2011 National Semiconductor
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/power_supply.h>
#include <linux/platform_data/lp8727.h>

#define LP8788_NUM_INTREGS	2
#define DEFAULT_DEBOUNCE_MSEC	270

/* Registers */
#define CTRL1		0x1
#define CTRL2		0x2
#define	SWCTRL		0x3
#define INT1		0x4
#define INT2		0x5
#define STATUS1		0x6
#define STATUS2		0x7
#define CHGCTRL2	0x9

/* CTRL1 register */
#define CP_EN		(1 << 0)
#define ADC_EN		(1 << 1)
#define ID200_EN	(1 << 4)

/* CTRL2 register */
#define CHGDET_EN	(1 << 1)
#define INT_EN		(1 << 6)

/* SWCTRL register */
#define SW_DM1_DM	(0x0 << 0)
#define SW_DM1_U1	(0x1 << 0)
#define SW_DM1_HiZ	(0x7 << 0)
#define SW_DP2_DP	(0x0 << 3)
#define SW_DP2_U2	(0x1 << 3)
#define SW_DP2_HiZ	(0x7 << 3)

/* INT1 register */
#define IDNO		(0xF << 0)
#define VBUS		(1 << 4)

/* STATUS1 register */
#define CHGSTAT		(3 << 4)
#define CHPORT		(1 << 6)
#define DCPORT		(1 << 7)
#define LP8727_STAT_EOC			0x30

/* STATUS2 register */
#define TEMP_STAT	(3 << 5)
#define TEMP_SHIFT	5

enum lp8727_dev_id {
	ID_NONE,
	ID_TA,
	ID_DEDICATED_CHG,
	ID_USB_CHG,
	ID_USB_DS,
	ID_MAX,
};

enum lp8727_die_temp {
	LP8788_TEMP_75C,
	LP8788_TEMP_95C,
	LP8788_TEMP_115C,
	LP8788_TEMP_135C,
};

struct lp8727_psy {
	struct power_supply ac;
	struct power_supply usb;
	struct power_supply batt;
};

struct lp8727_chg {
	struct device *dev;
	struct i2c_client *client;
	struct mutex xfer_lock;
	struct delayed_work work;
	struct lp8727_platform_data *pdata;
	struct lp8727_psy *psy;
	struct lp8727_chg_param *chg_parm;
	enum lp8727_dev_id devid;
	unsigned long debounce_jiffies;
	int irq;
};

static int lp8727_read_bytes(struct lp8727_chg *pchg, u8 reg, u8 *data, u8 len)
{
	s32 ret;

	mutex_lock(&pchg->xfer_lock);
	ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data);
	mutex_unlock(&pchg->xfer_lock);

	return (ret != len) ? -EIO : 0;
}

static inline int lp8727_read_byte(struct lp8727_chg *pchg, u8 reg, u8 *data)
{
	return lp8727_read_bytes(pchg, reg, data, 1);
}

static int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data)
{
	int ret;

	mutex_lock(&pchg->xfer_lock);
	ret = i2c_smbus_write_byte_data(pchg->client, reg, data);
	mutex_unlock(&pchg->xfer_lock);

	return ret;
}

static int lp8727_is_charger_attached(const char *name, int id)
{
	if (name) {
		if (!strcmp(name, "ac"))
			return (id == ID_TA || id == ID_DEDICATED_CHG) ? 1 : 0;
		else if (!strcmp(name, "usb"))
			return (id == ID_USB_CHG) ? 1 : 0;
	}

	return (id >= ID_TA && id <= ID_USB_CHG) ? 1 : 0;
}

static int lp8727_init_device(struct lp8727_chg *pchg)
{
	u8 val;
	int ret;
	u8 intstat[LP8788_NUM_INTREGS];

	/* clear interrupts */
	ret = lp8727_read_bytes(pchg, INT1, intstat, LP8788_NUM_INTREGS);
	if (ret)
		return ret;


	val = ID200_EN | ADC_EN | CP_EN;
	ret = lp8727_write_byte(pchg, CTRL1, val);
	if (ret)
		return ret;

	val = INT_EN | CHGDET_EN;
	ret = lp8727_write_byte(pchg, CTRL2, val);
	if (ret)
		return ret;

	return 0;
}

static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
{
	u8 val;
	lp8727_read_byte(pchg, STATUS1, &val);
	return val & DCPORT;
}

static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
{
	u8 val;
	lp8727_read_byte(pchg, STATUS1, &val);
	return val & CHPORT;
}

static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
{
	lp8727_write_byte(pchg, SWCTRL, sw);
}

static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
{
	struct lp8727_platform_data *pdata = pchg->pdata;
	u8 devid = ID_NONE;
	u8 swctrl = SW_DM1_HiZ | SW_DP2_HiZ;

	switch (id) {
	case 0x5:
		devid = ID_TA;
		pchg->chg_parm = pdata ? pdata->ac : NULL;
		break;
	case 0xB:
		if (lp8727_is_dedicated_charger(pchg)) {
			pchg->chg_parm = pdata ? pdata->ac : NULL;
			devid = ID_DEDICATED_CHG;
		} else if (lp8727_is_usb_charger(pchg)) {
			pchg->chg_parm = pdata ? pdata->usb : NULL;
			devid = ID_USB_CHG;
			swctrl = SW_DM1_DM | SW_DP2_DP;
		} else if (vbusin) {
			devid = ID_USB_DS;
			swctrl = SW_DM1_DM | SW_DP2_DP;
		}
		break;
	default:
		devid = ID_NONE;
		pchg->chg_parm = NULL;
		break;
	}

	pchg->devid = devid;
	lp8727_ctrl_switch(pchg, swctrl);
}

static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
{
	u8 val;

	lp8727_read_byte(pchg, CTRL2, &val);
	val |= CHGDET_EN;
	lp8727_write_byte(pchg, CTRL2, val);
}

static void lp8727_delayed_func(struct work_struct *_work)
{
	u8 intstat[2], idno, vbus;
	struct lp8727_chg *pchg =
	    container_of(_work, struct lp8727_chg, work.work);

	if (lp8727_read_bytes(pchg, INT1, intstat, 2)) {
		dev_err(pchg->dev, "can not read INT registers\n");
		return;
	}

	idno = intstat[0] & IDNO;
	vbus = intstat[0] & VBUS;

	lp8727_id_detection(pchg, idno, vbus);
	lp8727_enable_chgdet(pchg);

	power_supply_changed(&pchg->psy->ac);
	power_supply_changed(&pchg->psy->usb);
	power_supply_changed(&pchg->psy->batt);
}

static irqreturn_t lp8727_isr_func(int irq, void *ptr)
{
	struct lp8727_chg *pchg = ptr;

	schedule_delayed_work(&pchg->work, pchg->debounce_jiffies);
	return IRQ_HANDLED;
}

static int lp8727_setup_irq(struct lp8727_chg *pchg)
{
	int ret;
	int irq = pchg->client->irq;
	unsigned delay_msec = pchg->pdata ? pchg->pdata->debounce_msec :
						DEFAULT_DEBOUNCE_MSEC;

	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);

	if (irq <= 0) {
		dev_warn(pchg->dev, "invalid irq number: %d\n", irq);
		return 0;
	}

	ret = request_threaded_irq(irq,	NULL, lp8727_isr_func,
				IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
				"lp8727_irq", pchg);

	if (ret)
		return ret;

	pchg->irq = irq;
	pchg->debounce_jiffies = msecs_to_jiffies(delay_msec);

	return 0;
}

static void lp8727_release_irq(struct lp8727_chg *pchg)
{
	cancel_delayed_work_sync(&pchg->work);

	if (pchg->irq)
		free_irq(pchg->irq, pchg);
}

static enum power_supply_property lp8727_charger_prop[] = {
	POWER_SUPPLY_PROP_ONLINE,
};

static enum power_supply_property lp8727_battery_prop[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_CAPACITY,
	POWER_SUPPLY_PROP_TEMP,
};

static char *battery_supplied_to[] = {
	"main_batt",
};

static int lp8727_charger_get_property(struct power_supply *psy,
				       enum power_supply_property psp,
				       union power_supply_propval *val)
{
	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);

	if (psp == POWER_SUPPLY_PROP_ONLINE)
		val->intval = lp8727_is_charger_attached(psy->name,
							 pchg->devid);

	return 0;
}

static bool lp8727_is_high_temperature(enum lp8727_die_temp temp)
{
	switch (temp) {
	case LP8788_TEMP_95C:
	case LP8788_TEMP_115C:
	case LP8788_TEMP_135C:
		return true;
	default:
		return false;
	}
}

static int lp8727_battery_get_property(struct power_supply *psy,
				       enum power_supply_property psp,
				       union power_supply_propval *val)
{
	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	struct lp8727_platform_data *pdata = pchg->pdata;
	enum lp8727_die_temp temp;
	u8 read;

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
			lp8727_read_byte(pchg, STATUS1, &read);

			val->intval = (read & CHGSTAT) == LP8727_STAT_EOC ?
				POWER_SUPPLY_STATUS_FULL :
				POWER_SUPPLY_STATUS_CHARGING;
		} else {
			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
		}
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		lp8727_read_byte(pchg, STATUS2, &read);
		temp = (read & TEMP_STAT) >> TEMP_SHIFT;

		val->intval = lp8727_is_high_temperature(temp) ?
			POWER_SUPPLY_HEALTH_OVERHEAT :
			POWER_SUPPLY_HEALTH_GOOD;
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		if (!pdata)
			return -EINVAL;

		if (pdata->get_batt_present)
			val->intval = pchg->pdata->get_batt_present();
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		if (!pdata)
			return -EINVAL;

		if (pdata->get_batt_level)
			val->intval = pchg->pdata->get_batt_level();
		break;
	case POWER_SUPPLY_PROP_CAPACITY:
		if (!pdata)
			return -EINVAL;

		if (pdata->get_batt_capacity)
			val->intval = pchg->pdata->get_batt_capacity();
		break;
	case POWER_SUPPLY_PROP_TEMP:
		if (!pdata)
			return -EINVAL;

		if (pdata->get_batt_temp)
			val->intval = pchg->pdata->get_batt_temp();
		break;
	default:
		break;
	}

	return 0;
}

static void lp8727_charger_changed(struct power_supply *psy)
{
	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	u8 val;
	u8 eoc_level, ichg;

	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
		if (pchg->chg_parm) {
			eoc_level = pchg->chg_parm->eoc_level;
			ichg = pchg->chg_parm->ichg;
			val = (ichg << 4) | eoc_level;
			lp8727_write_byte(pchg, CHGCTRL2, val);
		}
	}
}

static int lp8727_register_psy(struct lp8727_chg *pchg)
{
	struct lp8727_psy *psy;

	psy = devm_kzalloc(pchg->dev, sizeof(*psy), GFP_KERNEL);
	if (!psy)
		return -ENOMEM;

	pchg->psy = psy;

	psy->ac.name = "ac";
	psy->ac.type = POWER_SUPPLY_TYPE_MAINS;
	psy->ac.properties = lp8727_charger_prop;
	psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	psy->ac.get_property = lp8727_charger_get_property;
	psy->ac.supplied_to = battery_supplied_to;
	psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to);

	if (power_supply_register(pchg->dev, &psy->ac))
		goto err_psy_ac;

	psy->usb.name = "usb";
	psy->usb.type = POWER_SUPPLY_TYPE_USB;
	psy->usb.properties = lp8727_charger_prop;
	psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	psy->usb.get_property = lp8727_charger_get_property;
	psy->usb.supplied_to = battery_supplied_to;
	psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to);

	if (power_supply_register(pchg->dev, &psy->usb))
		goto err_psy_usb;

	psy->batt.name = "main_batt";
	psy->batt.type = POWER_SUPPLY_TYPE_BATTERY;
	psy->batt.properties = lp8727_battery_prop;
	psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop);
	psy->batt.get_property = lp8727_battery_get_property;
	psy->batt.external_power_changed = lp8727_charger_changed;

	if (power_supply_register(pchg->dev, &psy->batt))
		goto err_psy_batt;

	return 0;

err_psy_batt:
	power_supply_unregister(&psy->usb);
err_psy_usb:
	power_supply_unregister(&psy->ac);
err_psy_ac:
	return -EPERM;
}

static void lp8727_unregister_psy(struct lp8727_chg *pchg)
{
	struct lp8727_psy *psy = pchg->psy;

	if (!psy)
		return;

	power_supply_unregister(&psy->ac);
	power_supply_unregister(&psy->usb);
	power_supply_unregister(&psy->batt);
}

static int lp8727_probe(struct i2c_client *cl, const struct i2c_device_id *id)
{
	struct lp8727_chg *pchg;
	int ret;

	if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
		return -EIO;

	pchg = devm_kzalloc(&cl->dev, sizeof(*pchg), GFP_KERNEL);
	if (!pchg)
		return -ENOMEM;

	pchg->client = cl;
	pchg->dev = &cl->dev;
	pchg->pdata = cl->dev.platform_data;
	i2c_set_clientdata(cl, pchg);

	mutex_init(&pchg->xfer_lock);

	ret = lp8727_init_device(pchg);
	if (ret) {
		dev_err(pchg->dev, "i2c communication err: %d", ret);
		return ret;
	}

	ret = lp8727_register_psy(pchg);
	if (ret) {
		dev_err(pchg->dev, "power supplies register err: %d", ret);
		return ret;
	}

	ret = lp8727_setup_irq(pchg);
	if (ret) {
		dev_err(pchg->dev, "irq handler err: %d", ret);
		lp8727_unregister_psy(pchg);
		return ret;
	}

	return 0;
}

static int __devexit lp8727_remove(struct i2c_client *cl)
{
	struct lp8727_chg *pchg = i2c_get_clientdata(cl);

	lp8727_release_irq(pchg);
	lp8727_unregister_psy(pchg);
	return 0;
}

static const struct i2c_device_id lp8727_ids[] = {
	{"lp8727", 0},
	{ }
};
MODULE_DEVICE_TABLE(i2c, lp8727_ids);

static struct i2c_driver lp8727_driver = {
	.driver = {
		   .name = "lp8727",
		   },
	.probe = lp8727_probe,
	.remove = __devexit_p(lp8727_remove),
	.id_table = lp8727_ids,
};
module_i2c_driver(lp8727_driver);

MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
MODULE_AUTHOR("Woogyom Kim <milo.kim@ti.com>, "
	      "Daniel Jeong <daniel.jeong@ti.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
2165c8a4	1	/*
f7bae49a	2	* Driver for LP8727 Micro/Mini USB IC with integrated charger
2165c8a4	3	*
e39b828f	4	* Copyright (C) 2011 Texas Instruments
2165c8a4 WK	5	* Copyright (C) 2011 National Semiconductor
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/slab.h>
	15	#include <linux/interrupt.h>
	16	#include <linux/i2c.h>
	17	#include <linux/power_supply.h>
1aebb097	18	#include <linux/platform_data/lp8727.h>
2165c8a4	19
638555d2	20	#define LP8788_NUM_INTREGS 2
60fd57e0	21	#define DEFAULT_DEBOUNCE_MSEC 270
2165c8a4 WK	22
	23	/* Registers */
	24	#define CTRL1 0x1
	25	#define CTRL2 0x2
	26	#define SWCTRL 0x3
	27	#define INT1 0x4
	28	#define INT2 0x5
	29	#define STATUS1 0x6
7336880e	30	#define STATUS2 0x7
2165c8a4 WK	31	#define CHGCTRL2 0x9
	32
	33	/* CTRL1 register */
	34	#define CP_EN (1 << 0)
	35	#define ADC_EN (1 << 1)
	36	#define ID200_EN (1 << 4)
	37
	38	/* CTRL2 register */
	39	#define CHGDET_EN (1 << 1)
	40	#define INT_EN (1 << 6)
	41
	42	/* SWCTRL register */
	43	#define SW_DM1_DM (0x0 << 0)
	44	#define SW_DM1_U1 (0x1 << 0)
	45	#define SW_DM1_HiZ (0x7 << 0)
	46	#define SW_DP2_DP (0x0 << 3)
	47	#define SW_DP2_U2 (0x1 << 3)
	48	#define SW_DP2_HiZ (0x7 << 3)
	49
	50	/* INT1 register */
	51	#define IDNO (0xF << 0)
	52	#define VBUS (1 << 4)
	53
	54	/* STATUS1 register */
	55	#define CHGSTAT (3 << 4)
	56	#define CHPORT (1 << 6)
	57	#define DCPORT (1 << 7)
faaae9bb	58	#define LP8727_STAT_EOC 0x30
2165c8a4 WK	59
	60	/* STATUS2 register */
	61	#define TEMP_STAT (3 << 5)
b1ad0796	62	#define TEMP_SHIFT 5
2165c8a4 WK	63
	64	enum lp8727_dev_id {
	65	ID_NONE,
	66	ID_TA,
	67	ID_DEDICATED_CHG,
	68	ID_USB_CHG,
	69	ID_USB_DS,
	70	ID_MAX,
	71	};
	72
b1ad0796 KM	73	enum lp8727_die_temp {
	74	LP8788_TEMP_75C,
	75	LP8788_TEMP_95C,
	76	LP8788_TEMP_115C,
	77	LP8788_TEMP_135C,
	78	};
	79
2165c8a4 WK	80	struct lp8727_psy {
	81	struct power_supply ac;
	82	struct power_supply usb;
	83	struct power_supply batt;
	84	};
	85
	86	struct lp8727_chg {
	87	struct device *dev;
	88	struct i2c_client *client;
	89	struct mutex xfer_lock;
	90	struct delayed_work work;
2165c8a4 WK	91	struct lp8727_platform_data *pdata;
	92	struct lp8727_psy *psy;
	93	struct lp8727_chg_param *chg_parm;
	94	enum lp8727_dev_id devid;
60fd57e0	95	unsigned long debounce_jiffies;
d71fda01	96	int irq;
2165c8a4 WK	97	};
2165c8a4 WK	98
27aefa3b	99	static int lp8727_read_bytes(struct lp8727_chg pchg, u8 reg, u8 data, u8 len)
2165c8a4 WK	100	{
	101	s32 ret;
	102
	103	mutex_lock(&pchg->xfer_lock);
	104	ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data);
	105	mutex_unlock(&pchg->xfer_lock);
	106
	107	return (ret != len) ? -EIO : 0;
	108	}
	109
27aefa3b	110	static inline int lp8727_read_byte(struct lp8727_chg pchg, u8 reg, u8 data)
2165c8a4	111	{
27aefa3b KM	112	return lp8727_read_bytes(pchg, reg, data, 1);
	113	}
	114
	115	static int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data)
	116	{
	117	int ret;
2165c8a4 WK	118
2165c8a4 WK	119	mutex_lock(&pchg->xfer_lock);
27aefa3b	120	ret = i2c_smbus_write_byte_data(pchg->client, reg, data);
2165c8a4 WK	121	mutex_unlock(&pchg->xfer_lock);
	122
	123	return ret;
	124	}
	125
2165c8a4 WK	126	static int lp8727_is_charger_attached(const char *name, int id)
	127	{
	128	if (name) {
	129	if (!strcmp(name, "ac"))
	130	return (id == ID_TA \|\| id == ID_DEDICATED_CHG) ? 1 : 0;
	131	else if (!strcmp(name, "usb"))
	132	return (id == ID_USB_CHG) ? 1 : 0;
	133	}
	134
	135	return (id >= ID_TA && id <= ID_USB_CHG) ? 1 : 0;
	136	}
	137
7da6334e	138	static int lp8727_init_device(struct lp8727_chg *pchg)
2165c8a4 WK	139	{
2165c8a4 WK	140	u8 val;
7da6334e	141	int ret;
638555d2 KM	142	u8 intstat[LP8788_NUM_INTREGS];
	143
	144	/* clear interrupts */
	145	ret = lp8727_read_bytes(pchg, INT1, intstat, LP8788_NUM_INTREGS);
	146	if (ret)
	147	return ret;
	148
2165c8a4 WK	149
2165c8a4 WK	150	val = ID200_EN \| ADC_EN \| CP_EN;
27aefa3b	151	ret = lp8727_write_byte(pchg, CTRL1, val);
7da6334e KM	152	if (ret)
7da6334e KM	153	return ret;
2165c8a4 WK	154
2165c8a4 WK	155	val = INT_EN \| CHGDET_EN;
27aefa3b	156	ret = lp8727_write_byte(pchg, CTRL2, val);
7da6334e KM	157	if (ret)
	158	return ret;
	159
	160	return 0;
2165c8a4 WK	161	}
	162
	163	static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
	164	{
	165	u8 val;
27aefa3b	166	lp8727_read_byte(pchg, STATUS1, &val);
7336880e	167	return val & DCPORT;
2165c8a4 WK	168	}
	169
	170	static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
	171	{
	172	u8 val;
27aefa3b	173	lp8727_read_byte(pchg, STATUS1, &val);
7336880e	174	return val & CHPORT;
2165c8a4 WK	175	}
	176
	177	static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
	178	{
27aefa3b	179	lp8727_write_byte(pchg, SWCTRL, sw);
2165c8a4 WK	180	}
	181
	182	static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
	183	{
318cb389	184	struct lp8727_platform_data *pdata = pchg->pdata;
2165c8a4 WK	185	u8 devid = ID_NONE;
	186	u8 swctrl = SW_DM1_HiZ \| SW_DP2_HiZ;
	187
	188	switch (id) {
	189	case 0x5:
	190	devid = ID_TA;
318cb389	191	pchg->chg_parm = pdata ? pdata->ac : NULL;
2165c8a4 WK	192	break;
	193	case 0xB:
	194	if (lp8727_is_dedicated_charger(pchg)) {
318cb389	195	pchg->chg_parm = pdata ? pdata->ac : NULL;
2165c8a4 WK	196	devid = ID_DEDICATED_CHG;
2165c8a4 WK	197	} else if (lp8727_is_usb_charger(pchg)) {
318cb389	198	pchg->chg_parm = pdata ? pdata->usb : NULL;
2165c8a4 WK	199	devid = ID_USB_CHG;
	200	swctrl = SW_DM1_DM \| SW_DP2_DP;
	201	} else if (vbusin) {
	202	devid = ID_USB_DS;
	203	swctrl = SW_DM1_DM \| SW_DP2_DP;
	204	}
	205	break;
	206	default:
	207	devid = ID_NONE;
	208	pchg->chg_parm = NULL;
	209	break;
	210	}
	211
	212	pchg->devid = devid;
	213	lp8727_ctrl_switch(pchg, swctrl);
	214	}
	215
	216	static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
	217	{
	218	u8 val;
	219
27aefa3b	220	lp8727_read_byte(pchg, CTRL2, &val);
2165c8a4	221	val \|= CHGDET_EN;
27aefa3b	222	lp8727_write_byte(pchg, CTRL2, val);
2165c8a4 WK	223	}
	224
	225	static void lp8727_delayed_func(struct work_struct *_work)
	226	{
	227	u8 intstat[2], idno, vbus;
	228	struct lp8727_chg *pchg =
	229	container_of(_work, struct lp8727_chg, work.work);
	230
27aefa3b	231	if (lp8727_read_bytes(pchg, INT1, intstat, 2)) {
2165c8a4 WK	232	dev_err(pchg->dev, "can not read INT registers\n");
	233	return;
	234	}
	235
	236	idno = intstat[0] & IDNO;
	237	vbus = intstat[0] & VBUS;
	238
	239	lp8727_id_detection(pchg, idno, vbus);
	240	lp8727_enable_chgdet(pchg);
	241
	242	power_supply_changed(&pchg->psy->ac);
	243	power_supply_changed(&pchg->psy->usb);
	244	power_supply_changed(&pchg->psy->batt);
	245	}
	246
	247	static irqreturn_t lp8727_isr_func(int irq, void *ptr)
	248	{
	249	struct lp8727_chg *pchg = ptr;
2165c8a4	250
2a092582	251	schedule_delayed_work(&pchg->work, pchg->debounce_jiffies);
2165c8a4 WK	252	return IRQ_HANDLED;
	253	}
	254
d71fda01	255	static int lp8727_setup_irq(struct lp8727_chg *pchg)
2165c8a4	256	{
d71fda01 KM	257	int ret;
d71fda01 KM	258	int irq = pchg->client->irq;
60fd57e0 KM	259	unsigned delay_msec = pchg->pdata ? pchg->pdata->debounce_msec :
	260	DEFAULT_DEBOUNCE_MSEC;
	261
2165c8a4 WK	262	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);
2165c8a4 WK	263
d71fda01 KM	264	if (irq <= 0) {
	265	dev_warn(pchg->dev, "invalid irq number: %d\n", irq);
	266	return 0;
	267	}
60fd57e0	268
d71fda01	269	ret = request_threaded_irq(irq, NULL, lp8727_isr_func,
7c577c0d	270	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
d71fda01 KM	271	"lp8727_irq", pchg);
	272
	273	if (ret)
	274	return ret;
	275
	276	pchg->irq = irq;
	277	pchg->debounce_jiffies = msecs_to_jiffies(delay_msec);
	278
	279	return 0;
	280	}
	281
	282	static void lp8727_release_irq(struct lp8727_chg *pchg)
	283	{
	284	cancel_delayed_work_sync(&pchg->work);
	285
	286	if (pchg->irq)
	287	free_irq(pchg->irq, pchg);
2165c8a4 WK	288	}
	289
	290	static enum power_supply_property lp8727_charger_prop[] = {
	291	POWER_SUPPLY_PROP_ONLINE,
	292	};
	293
	294	static enum power_supply_property lp8727_battery_prop[] = {
	295	POWER_SUPPLY_PROP_STATUS,
	296	POWER_SUPPLY_PROP_HEALTH,
	297	POWER_SUPPLY_PROP_PRESENT,
	298	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	299	POWER_SUPPLY_PROP_CAPACITY,
	300	POWER_SUPPLY_PROP_TEMP,
	301	};
	302
	303	static char *battery_supplied_to[] = {
	304	"main_batt",
	305	};
	306
	307	static int lp8727_charger_get_property(struct power_supply *psy,
	308	enum power_supply_property psp,
	309	union power_supply_propval *val)
	310	{
	311	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	312
ce09affc	313	if (psp == POWER_SUPPLY_PROP_ONLINE)
2165c8a4 WK	314	val->intval = lp8727_is_charger_attached(psy->name,
2165c8a4 WK	315	pchg->devid);
2165c8a4 WK	316
	317	return 0;
	318	}
	319
b1ad0796 KM	320	static bool lp8727_is_high_temperature(enum lp8727_die_temp temp)
	321	{
	322	switch (temp) {
	323	case LP8788_TEMP_95C:
	324	case LP8788_TEMP_115C:
	325	case LP8788_TEMP_135C:
	326	return true;
	327	default:
	328	return false;
	329	}
	330	}
	331
2165c8a4 WK	332	static int lp8727_battery_get_property(struct power_supply *psy,
	333	enum power_supply_property psp,
	334	union power_supply_propval *val)
	335	{
	336	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
318cb389	337	struct lp8727_platform_data *pdata = pchg->pdata;
b1ad0796	338	enum lp8727_die_temp temp;
2165c8a4 WK	339	u8 read;
	340
	341	switch (psp) {
	342	case POWER_SUPPLY_PROP_STATUS:
	343	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
27aefa3b	344	lp8727_read_byte(pchg, STATUS1, &read);
faaae9bb KM	345
	346	val->intval = (read & CHGSTAT) == LP8727_STAT_EOC ?
	347	POWER_SUPPLY_STATUS_FULL :
	348	POWER_SUPPLY_STATUS_CHARGING;
2165c8a4 WK	349	} else {
	350	val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
	351	}
	352	break;
	353	case POWER_SUPPLY_PROP_HEALTH:
27aefa3b	354	lp8727_read_byte(pchg, STATUS2, &read);
b1ad0796 KM	355	temp = (read & TEMP_STAT) >> TEMP_SHIFT;
	356
	357	val->intval = lp8727_is_high_temperature(temp) ?
	358	POWER_SUPPLY_HEALTH_OVERHEAT :
	359	POWER_SUPPLY_HEALTH_GOOD;
2165c8a4 WK	360	break;
2165c8a4 WK	361	case POWER_SUPPLY_PROP_PRESENT:
318cb389 KM	362	if (!pdata)
	363	return -EINVAL;
	364
	365	if (pdata->get_batt_present)
2165c8a4 WK	366	val->intval = pchg->pdata->get_batt_present();
	367	break;
	368	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
318cb389 KM	369	if (!pdata)
	370	return -EINVAL;
	371
	372	if (pdata->get_batt_level)
2165c8a4 WK	373	val->intval = pchg->pdata->get_batt_level();
	374	break;
	375	case POWER_SUPPLY_PROP_CAPACITY:
318cb389 KM	376	if (!pdata)
	377	return -EINVAL;
	378
	379	if (pdata->get_batt_capacity)
2165c8a4 WK	380	val->intval = pchg->pdata->get_batt_capacity();
	381	break;
	382	case POWER_SUPPLY_PROP_TEMP:
318cb389 KM	383	if (!pdata)
	384	return -EINVAL;
	385
	386	if (pdata->get_batt_temp)
2165c8a4 WK	387	val->intval = pchg->pdata->get_batt_temp();
	388	break;
	389	default:
	390	break;
	391	}
	392
	393	return 0;
	394	}
	395
	396	static void lp8727_charger_changed(struct power_supply *psy)
	397	{
	398	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	399	u8 val;
	400	u8 eoc_level, ichg;
	401
	402	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
	403	if (pchg->chg_parm) {
	404	eoc_level = pchg->chg_parm->eoc_level;
	405	ichg = pchg->chg_parm->ichg;
	406	val = (ichg << 4) \| eoc_level;
27aefa3b	407	lp8727_write_byte(pchg, CHGCTRL2, val);
2165c8a4 WK	408	}
	409	}
	410	}
	411
	412	static int lp8727_register_psy(struct lp8727_chg *pchg)
	413	{
	414	struct lp8727_psy *psy;
	415
74727c57	416	psy = devm_kzalloc(pchg->dev, sizeof(*psy), GFP_KERNEL);
2165c8a4	417	if (!psy)
6297b5e5	418	return -ENOMEM;
2165c8a4 WK	419
	420	pchg->psy = psy;
	421
	422	psy->ac.name = "ac";
	423	psy->ac.type = POWER_SUPPLY_TYPE_MAINS;
	424	psy->ac.properties = lp8727_charger_prop;
	425	psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	426	psy->ac.get_property = lp8727_charger_get_property;
	427	psy->ac.supplied_to = battery_supplied_to;
	428	psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	429
	430	if (power_supply_register(pchg->dev, &psy->ac))
6297b5e5	431	goto err_psy_ac;
2165c8a4 WK	432
	433	psy->usb.name = "usb";
	434	psy->usb.type = POWER_SUPPLY_TYPE_USB;
	435	psy->usb.properties = lp8727_charger_prop;
	436	psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	437	psy->usb.get_property = lp8727_charger_get_property;
	438	psy->usb.supplied_to = battery_supplied_to;
	439	psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	440
	441	if (power_supply_register(pchg->dev, &psy->usb))
6297b5e5	442	goto err_psy_usb;
2165c8a4 WK	443
	444	psy->batt.name = "main_batt";
	445	psy->batt.type = POWER_SUPPLY_TYPE_BATTERY;
	446	psy->batt.properties = lp8727_battery_prop;
	447	psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop);
	448	psy->batt.get_property = lp8727_battery_get_property;
	449	psy->batt.external_power_changed = lp8727_charger_changed;
	450
	451	if (power_supply_register(pchg->dev, &psy->batt))
6297b5e5	452	goto err_psy_batt;
2165c8a4 WK	453
	454	return 0;
	455
6297b5e5 DN	456	err_psy_batt:
	457	power_supply_unregister(&psy->usb);
	458	err_psy_usb:
	459	power_supply_unregister(&psy->ac);
	460	err_psy_ac:
2165c8a4 WK	461	return -EPERM;
	462	}
	463
	464	static void lp8727_unregister_psy(struct lp8727_chg *pchg)
	465	{
	466	struct lp8727_psy *psy = pchg->psy;
	467
ce09affc KM	468	if (!psy)
	469	return;
	470
	471	power_supply_unregister(&psy->ac);
	472	power_supply_unregister(&psy->usb);
	473	power_supply_unregister(&psy->batt);
2165c8a4 WK	474	}
	475
	476	static int lp8727_probe(struct i2c_client cl, const struct i2c_device_id id)
	477	{
	478	struct lp8727_chg *pchg;
	479	int ret;
	480
998a8e7a KM	481	if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
	482	return -EIO;
	483
74727c57	484	pchg = devm_kzalloc(&cl->dev, sizeof(*pchg), GFP_KERNEL);
2165c8a4 WK	485	if (!pchg)
	486	return -ENOMEM;
	487
	488	pchg->client = cl;
	489	pchg->dev = &cl->dev;
	490	pchg->pdata = cl->dev.platform_data;
	491	i2c_set_clientdata(cl, pchg);
	492
	493	mutex_init(&pchg->xfer_lock);
	494
7da6334e KM	495	ret = lp8727_init_device(pchg);
	496	if (ret) {
	497	dev_err(pchg->dev, "i2c communication err: %d", ret);
fb9adc51	498	return ret;
7da6334e KM	499	}
7da6334e KM	500
fb9adc51	501	ret = lp8727_register_psy(pchg);
7da6334e	502	if (ret) {
fb9adc51 KM	503	dev_err(pchg->dev, "power supplies register err: %d", ret);
fb9adc51 KM	504	return ret;
7da6334e	505	}
2165c8a4	506
d71fda01	507	ret = lp8727_setup_irq(pchg);
7da6334e	508	if (ret) {
fb9adc51 KM	509	dev_err(pchg->dev, "irq handler err: %d", ret);
	510	lp8727_unregister_psy(pchg);
	511	return ret;
7da6334e	512	}
2165c8a4 WK	513
	514	return 0;
	515	}
	516
	517	static int __devexit lp8727_remove(struct i2c_client *cl)
	518	{
	519	struct lp8727_chg *pchg = i2c_get_clientdata(cl);
	520
d71fda01	521	lp8727_release_irq(pchg);
fb9adc51	522	lp8727_unregister_psy(pchg);
2165c8a4 WK	523	return 0;
	524	}
	525
	526	static const struct i2c_device_id lp8727_ids[] = {
	527	{"lp8727", 0},
455a0e2c	528	{ }
2165c8a4	529	};
e2c5f7db	530	MODULE_DEVICE_TABLE(i2c, lp8727_ids);
2165c8a4 WK	531
	532	static struct i2c_driver lp8727_driver = {
	533	.driver = {
	534	.name = "lp8727",
	535	},
	536	.probe = lp8727_probe,
	537	.remove = __devexit_p(lp8727_remove),
	538	.id_table = lp8727_ids,
	539	};
5ff92e7a	540	module_i2c_driver(lp8727_driver);
2165c8a4	541
e39b828f	542	MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
7336880e KM	543	MODULE_AUTHOR("Woogyom Kim <milo.kim@ti.com>, "
7336880e KM	544	"Daniel Jeong <daniel.jeong@ti.com>");
2165c8a4	545	MODULE_LICENSE("GPL");