[linux-2.6-block.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)

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

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

enum lp8727_chg_stat {
	PRECHG,
	CC,
	CV,
	EOC,
};

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 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;
	u8 read;

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
			lp8727_read_byte(pchg, STATUS1, &read);
			if (((read & CHGSTAT) >> 4) == EOC)
				val->intval = POWER_SUPPLY_STATUS_FULL;
			else
				val->intval = POWER_SUPPLY_STATUS_CHARGING;
		} else {
			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
		}
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		lp8727_read_byte(pchg, STATUS2, &read);
		read = (read & TEMP_STAT) >> 5;
		if (read >= 0x1 && read <= 0x3)
			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
		else
			val->intval = 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)
	58
	59	/* STATUS2 register */
	60	#define TEMP_STAT (3 << 5)
	61
	62	enum lp8727_dev_id {
	63	ID_NONE,
	64	ID_TA,
	65	ID_DEDICATED_CHG,
	66	ID_USB_CHG,
	67	ID_USB_DS,
	68	ID_MAX,
	69	};
	70
	71	enum lp8727_chg_stat {
	72	PRECHG,
	73	CC,
	74	CV,
	75	EOC,
	76	};
	77
	78	struct lp8727_psy {
	79	struct power_supply ac;
	80	struct power_supply usb;
	81	struct power_supply batt;
	82	};
	83
	84	struct lp8727_chg {
	85	struct device *dev;
	86	struct i2c_client *client;
	87	struct mutex xfer_lock;
	88	struct delayed_work work;
2165c8a4 WK	89	struct lp8727_platform_data *pdata;
	90	struct lp8727_psy *psy;
	91	struct lp8727_chg_param *chg_parm;
	92	enum lp8727_dev_id devid;
60fd57e0	93	unsigned long debounce_jiffies;
d71fda01	94	int irq;
2165c8a4 WK	95	};
2165c8a4 WK	96
27aefa3b	97	static int lp8727_read_bytes(struct lp8727_chg pchg, u8 reg, u8 data, u8 len)
2165c8a4 WK	98	{
	99	s32 ret;
	100
	101	mutex_lock(&pchg->xfer_lock);
	102	ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data);
	103	mutex_unlock(&pchg->xfer_lock);
	104
	105	return (ret != len) ? -EIO : 0;
	106	}
	107
27aefa3b	108	static inline int lp8727_read_byte(struct lp8727_chg pchg, u8 reg, u8 data)
2165c8a4	109	{
27aefa3b KM	110	return lp8727_read_bytes(pchg, reg, data, 1);
	111	}
	112
	113	static int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data)
	114	{
	115	int ret;
2165c8a4 WK	116
2165c8a4 WK	117	mutex_lock(&pchg->xfer_lock);
27aefa3b	118	ret = i2c_smbus_write_byte_data(pchg->client, reg, data);
2165c8a4 WK	119	mutex_unlock(&pchg->xfer_lock);
	120
	121	return ret;
	122	}
	123
2165c8a4 WK	124	static int lp8727_is_charger_attached(const char *name, int id)
	125	{
	126	if (name) {
	127	if (!strcmp(name, "ac"))
	128	return (id == ID_TA \|\| id == ID_DEDICATED_CHG) ? 1 : 0;
	129	else if (!strcmp(name, "usb"))
	130	return (id == ID_USB_CHG) ? 1 : 0;
	131	}
	132
	133	return (id >= ID_TA && id <= ID_USB_CHG) ? 1 : 0;
	134	}
	135
7da6334e	136	static int lp8727_init_device(struct lp8727_chg *pchg)
2165c8a4 WK	137	{
2165c8a4 WK	138	u8 val;
7da6334e	139	int ret;
638555d2 KM	140	u8 intstat[LP8788_NUM_INTREGS];
	141
	142	/* clear interrupts */
	143	ret = lp8727_read_bytes(pchg, INT1, intstat, LP8788_NUM_INTREGS);
	144	if (ret)
	145	return ret;
	146
2165c8a4 WK	147
2165c8a4 WK	148	val = ID200_EN \| ADC_EN \| CP_EN;
27aefa3b	149	ret = lp8727_write_byte(pchg, CTRL1, val);
7da6334e KM	150	if (ret)
7da6334e KM	151	return ret;
2165c8a4 WK	152
2165c8a4 WK	153	val = INT_EN \| CHGDET_EN;
27aefa3b	154	ret = lp8727_write_byte(pchg, CTRL2, val);
7da6334e KM	155	if (ret)
	156	return ret;
	157
	158	return 0;
2165c8a4 WK	159	}
	160
	161	static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
	162	{
	163	u8 val;
27aefa3b	164	lp8727_read_byte(pchg, STATUS1, &val);
7336880e	165	return val & DCPORT;
2165c8a4 WK	166	}
	167
	168	static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
	169	{
	170	u8 val;
27aefa3b	171	lp8727_read_byte(pchg, STATUS1, &val);
7336880e	172	return val & CHPORT;
2165c8a4 WK	173	}
	174
	175	static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
	176	{
27aefa3b	177	lp8727_write_byte(pchg, SWCTRL, sw);
2165c8a4 WK	178	}
	179
	180	static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
	181	{
318cb389	182	struct lp8727_platform_data *pdata = pchg->pdata;
2165c8a4 WK	183	u8 devid = ID_NONE;
	184	u8 swctrl = SW_DM1_HiZ \| SW_DP2_HiZ;
	185
	186	switch (id) {
	187	case 0x5:
	188	devid = ID_TA;
318cb389	189	pchg->chg_parm = pdata ? pdata->ac : NULL;
2165c8a4 WK	190	break;
	191	case 0xB:
	192	if (lp8727_is_dedicated_charger(pchg)) {
318cb389	193	pchg->chg_parm = pdata ? pdata->ac : NULL;
2165c8a4 WK	194	devid = ID_DEDICATED_CHG;
2165c8a4 WK	195	} else if (lp8727_is_usb_charger(pchg)) {
318cb389	196	pchg->chg_parm = pdata ? pdata->usb : NULL;
2165c8a4 WK	197	devid = ID_USB_CHG;
	198	swctrl = SW_DM1_DM \| SW_DP2_DP;
	199	} else if (vbusin) {
	200	devid = ID_USB_DS;
	201	swctrl = SW_DM1_DM \| SW_DP2_DP;
	202	}
	203	break;
	204	default:
	205	devid = ID_NONE;
	206	pchg->chg_parm = NULL;
	207	break;
	208	}
	209
	210	pchg->devid = devid;
	211	lp8727_ctrl_switch(pchg, swctrl);
	212	}
	213
	214	static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
	215	{
	216	u8 val;
	217
27aefa3b	218	lp8727_read_byte(pchg, CTRL2, &val);
2165c8a4	219	val \|= CHGDET_EN;
27aefa3b	220	lp8727_write_byte(pchg, CTRL2, val);
2165c8a4 WK	221	}
	222
	223	static void lp8727_delayed_func(struct work_struct *_work)
	224	{
	225	u8 intstat[2], idno, vbus;
	226	struct lp8727_chg *pchg =
	227	container_of(_work, struct lp8727_chg, work.work);
	228
27aefa3b	229	if (lp8727_read_bytes(pchg, INT1, intstat, 2)) {
2165c8a4 WK	230	dev_err(pchg->dev, "can not read INT registers\n");
	231	return;
	232	}
	233
	234	idno = intstat[0] & IDNO;
	235	vbus = intstat[0] & VBUS;
	236
	237	lp8727_id_detection(pchg, idno, vbus);
	238	lp8727_enable_chgdet(pchg);
	239
	240	power_supply_changed(&pchg->psy->ac);
	241	power_supply_changed(&pchg->psy->usb);
	242	power_supply_changed(&pchg->psy->batt);
	243	}
	244
	245	static irqreturn_t lp8727_isr_func(int irq, void *ptr)
	246	{
	247	struct lp8727_chg *pchg = ptr;
2165c8a4	248
2a092582	249	schedule_delayed_work(&pchg->work, pchg->debounce_jiffies);
2165c8a4 WK	250	return IRQ_HANDLED;
	251	}
	252
d71fda01	253	static int lp8727_setup_irq(struct lp8727_chg *pchg)
2165c8a4	254	{
d71fda01 KM	255	int ret;
d71fda01 KM	256	int irq = pchg->client->irq;
60fd57e0 KM	257	unsigned delay_msec = pchg->pdata ? pchg->pdata->debounce_msec :
	258	DEFAULT_DEBOUNCE_MSEC;
	259
2165c8a4 WK	260	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);
2165c8a4 WK	261
d71fda01 KM	262	if (irq <= 0) {
	263	dev_warn(pchg->dev, "invalid irq number: %d\n", irq);
	264	return 0;
	265	}
60fd57e0	266
d71fda01	267	ret = request_threaded_irq(irq, NULL, lp8727_isr_func,
7c577c0d	268	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
d71fda01 KM	269	"lp8727_irq", pchg);
	270
	271	if (ret)
	272	return ret;
	273
	274	pchg->irq = irq;
	275	pchg->debounce_jiffies = msecs_to_jiffies(delay_msec);
	276
	277	return 0;
	278	}
	279
	280	static void lp8727_release_irq(struct lp8727_chg *pchg)
	281	{
	282	cancel_delayed_work_sync(&pchg->work);
	283
	284	if (pchg->irq)
	285	free_irq(pchg->irq, pchg);
2165c8a4 WK	286	}
	287
	288	static enum power_supply_property lp8727_charger_prop[] = {
	289	POWER_SUPPLY_PROP_ONLINE,
	290	};
	291
	292	static enum power_supply_property lp8727_battery_prop[] = {
	293	POWER_SUPPLY_PROP_STATUS,
	294	POWER_SUPPLY_PROP_HEALTH,
	295	POWER_SUPPLY_PROP_PRESENT,
	296	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	297	POWER_SUPPLY_PROP_CAPACITY,
	298	POWER_SUPPLY_PROP_TEMP,
	299	};
	300
	301	static char *battery_supplied_to[] = {
	302	"main_batt",
	303	};
	304
	305	static int lp8727_charger_get_property(struct power_supply *psy,
	306	enum power_supply_property psp,
	307	union power_supply_propval *val)
	308	{
	309	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	310
ce09affc	311	if (psp == POWER_SUPPLY_PROP_ONLINE)
2165c8a4 WK	312	val->intval = lp8727_is_charger_attached(psy->name,
2165c8a4 WK	313	pchg->devid);
2165c8a4 WK	314
	315	return 0;
	316	}
	317
	318	static int lp8727_battery_get_property(struct power_supply *psy,
	319	enum power_supply_property psp,
	320	union power_supply_propval *val)
	321	{
	322	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
318cb389	323	struct lp8727_platform_data *pdata = pchg->pdata;
2165c8a4 WK	324	u8 read;
	325
	326	switch (psp) {
	327	case POWER_SUPPLY_PROP_STATUS:
	328	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
27aefa3b	329	lp8727_read_byte(pchg, STATUS1, &read);
2165c8a4 WK	330	if (((read & CHGSTAT) >> 4) == EOC)
	331	val->intval = POWER_SUPPLY_STATUS_FULL;
	332	else
	333	val->intval = POWER_SUPPLY_STATUS_CHARGING;
	334	} else {
	335	val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
	336	}
	337	break;
	338	case POWER_SUPPLY_PROP_HEALTH:
27aefa3b	339	lp8727_read_byte(pchg, STATUS2, &read);
2165c8a4 WK	340	read = (read & TEMP_STAT) >> 5;
	341	if (read >= 0x1 && read <= 0x3)
	342	val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
	343	else
	344	val->intval = POWER_SUPPLY_HEALTH_GOOD;
	345	break;
	346	case POWER_SUPPLY_PROP_PRESENT:
318cb389 KM	347	if (!pdata)
	348	return -EINVAL;
	349
	350	if (pdata->get_batt_present)
2165c8a4 WK	351	val->intval = pchg->pdata->get_batt_present();
	352	break;
	353	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
318cb389 KM	354	if (!pdata)
	355	return -EINVAL;
	356
	357	if (pdata->get_batt_level)
2165c8a4 WK	358	val->intval = pchg->pdata->get_batt_level();
	359	break;
	360	case POWER_SUPPLY_PROP_CAPACITY:
318cb389 KM	361	if (!pdata)
	362	return -EINVAL;
	363
	364	if (pdata->get_batt_capacity)
2165c8a4 WK	365	val->intval = pchg->pdata->get_batt_capacity();
	366	break;
	367	case POWER_SUPPLY_PROP_TEMP:
318cb389 KM	368	if (!pdata)
	369	return -EINVAL;
	370
	371	if (pdata->get_batt_temp)
2165c8a4 WK	372	val->intval = pchg->pdata->get_batt_temp();
	373	break;
	374	default:
	375	break;
	376	}
	377
	378	return 0;
	379	}
	380
	381	static void lp8727_charger_changed(struct power_supply *psy)
	382	{
	383	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	384	u8 val;
	385	u8 eoc_level, ichg;
	386
	387	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
	388	if (pchg->chg_parm) {
	389	eoc_level = pchg->chg_parm->eoc_level;
	390	ichg = pchg->chg_parm->ichg;
	391	val = (ichg << 4) \| eoc_level;
27aefa3b	392	lp8727_write_byte(pchg, CHGCTRL2, val);
2165c8a4 WK	393	}
	394	}
	395	}
	396
	397	static int lp8727_register_psy(struct lp8727_chg *pchg)
	398	{
	399	struct lp8727_psy *psy;
	400
74727c57	401	psy = devm_kzalloc(pchg->dev, sizeof(*psy), GFP_KERNEL);
2165c8a4	402	if (!psy)
6297b5e5	403	return -ENOMEM;
2165c8a4 WK	404
	405	pchg->psy = psy;
	406
	407	psy->ac.name = "ac";
	408	psy->ac.type = POWER_SUPPLY_TYPE_MAINS;
	409	psy->ac.properties = lp8727_charger_prop;
	410	psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	411	psy->ac.get_property = lp8727_charger_get_property;
	412	psy->ac.supplied_to = battery_supplied_to;
	413	psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	414
	415	if (power_supply_register(pchg->dev, &psy->ac))
6297b5e5	416	goto err_psy_ac;
2165c8a4 WK	417
	418	psy->usb.name = "usb";
	419	psy->usb.type = POWER_SUPPLY_TYPE_USB;
	420	psy->usb.properties = lp8727_charger_prop;
	421	psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	422	psy->usb.get_property = lp8727_charger_get_property;
	423	psy->usb.supplied_to = battery_supplied_to;
	424	psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	425
	426	if (power_supply_register(pchg->dev, &psy->usb))
6297b5e5	427	goto err_psy_usb;
2165c8a4 WK	428
	429	psy->batt.name = "main_batt";
	430	psy->batt.type = POWER_SUPPLY_TYPE_BATTERY;
	431	psy->batt.properties = lp8727_battery_prop;
	432	psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop);
	433	psy->batt.get_property = lp8727_battery_get_property;
	434	psy->batt.external_power_changed = lp8727_charger_changed;
	435
	436	if (power_supply_register(pchg->dev, &psy->batt))
6297b5e5	437	goto err_psy_batt;
2165c8a4 WK	438
	439	return 0;
	440
6297b5e5 DN	441	err_psy_batt:
	442	power_supply_unregister(&psy->usb);
	443	err_psy_usb:
	444	power_supply_unregister(&psy->ac);
	445	err_psy_ac:
2165c8a4 WK	446	return -EPERM;
	447	}
	448
	449	static void lp8727_unregister_psy(struct lp8727_chg *pchg)
	450	{
	451	struct lp8727_psy *psy = pchg->psy;
	452
ce09affc KM	453	if (!psy)
	454	return;
	455
	456	power_supply_unregister(&psy->ac);
	457	power_supply_unregister(&psy->usb);
	458	power_supply_unregister(&psy->batt);
2165c8a4 WK	459	}
	460
	461	static int lp8727_probe(struct i2c_client cl, const struct i2c_device_id id)
	462	{
	463	struct lp8727_chg *pchg;
	464	int ret;
	465
998a8e7a KM	466	if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
	467	return -EIO;
	468
74727c57	469	pchg = devm_kzalloc(&cl->dev, sizeof(*pchg), GFP_KERNEL);
2165c8a4 WK	470	if (!pchg)
	471	return -ENOMEM;
	472
	473	pchg->client = cl;
	474	pchg->dev = &cl->dev;
	475	pchg->pdata = cl->dev.platform_data;
	476	i2c_set_clientdata(cl, pchg);
	477
	478	mutex_init(&pchg->xfer_lock);
	479
7da6334e KM	480	ret = lp8727_init_device(pchg);
	481	if (ret) {
	482	dev_err(pchg->dev, "i2c communication err: %d", ret);
fb9adc51	483	return ret;
7da6334e KM	484	}
7da6334e KM	485
fb9adc51	486	ret = lp8727_register_psy(pchg);
7da6334e	487	if (ret) {
fb9adc51 KM	488	dev_err(pchg->dev, "power supplies register err: %d", ret);
fb9adc51 KM	489	return ret;
7da6334e	490	}
2165c8a4	491
d71fda01	492	ret = lp8727_setup_irq(pchg);
7da6334e	493	if (ret) {
fb9adc51 KM	494	dev_err(pchg->dev, "irq handler err: %d", ret);
	495	lp8727_unregister_psy(pchg);
	496	return ret;
7da6334e	497	}
2165c8a4 WK	498
	499	return 0;
	500	}
	501
	502	static int __devexit lp8727_remove(struct i2c_client *cl)
	503	{
	504	struct lp8727_chg *pchg = i2c_get_clientdata(cl);
	505
d71fda01	506	lp8727_release_irq(pchg);
fb9adc51	507	lp8727_unregister_psy(pchg);
2165c8a4 WK	508	return 0;
	509	}
	510
	511	static const struct i2c_device_id lp8727_ids[] = {
	512	{"lp8727", 0},
455a0e2c	513	{ }
2165c8a4	514	};
e2c5f7db	515	MODULE_DEVICE_TABLE(i2c, lp8727_ids);
2165c8a4 WK	516
	517	static struct i2c_driver lp8727_driver = {
	518	.driver = {
	519	.name = "lp8727",
	520	},
	521	.probe = lp8727_probe,
	522	.remove = __devexit_p(lp8727_remove),
	523	.id_table = lp8727_ids,
	524	};
5ff92e7a	525	module_i2c_driver(lp8727_driver);
2165c8a4	526
e39b828f	527	MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
7336880e KM	528	MODULE_AUTHOR("Woogyom Kim <milo.kim@ti.com>, "
7336880e KM	529	"Daniel Jeong <daniel.jeong@ti.com>");
2165c8a4	530	MODULE_LICENSE("GPL");