[deliverable/linux.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 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;

	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
60fd57e0	20	#define DEFAULT_DEBOUNCE_MSEC 270
2165c8a4 WK	21
	22	/* Registers */
	23	#define CTRL1 0x1
	24	#define CTRL2 0x2
	25	#define SWCTRL 0x3
	26	#define INT1 0x4
	27	#define INT2 0x5
	28	#define STATUS1 0x6
7336880e	29	#define STATUS2 0x7
2165c8a4 WK	30	#define CHGCTRL2 0x9
	31
	32	/* CTRL1 register */
	33	#define CP_EN (1 << 0)
	34	#define ADC_EN (1 << 1)
	35	#define ID200_EN (1 << 4)
	36
	37	/* CTRL2 register */
	38	#define CHGDET_EN (1 << 1)
	39	#define INT_EN (1 << 6)
	40
	41	/* SWCTRL register */
	42	#define SW_DM1_DM (0x0 << 0)
	43	#define SW_DM1_U1 (0x1 << 0)
	44	#define SW_DM1_HiZ (0x7 << 0)
	45	#define SW_DP2_DP (0x0 << 3)
	46	#define SW_DP2_U2 (0x1 << 3)
	47	#define SW_DP2_HiZ (0x7 << 3)
	48
	49	/* INT1 register */
	50	#define IDNO (0xF << 0)
	51	#define VBUS (1 << 4)
	52
	53	/* STATUS1 register */
	54	#define CHGSTAT (3 << 4)
	55	#define CHPORT (1 << 6)
	56	#define DCPORT (1 << 7)
	57
	58	/* STATUS2 register */
	59	#define TEMP_STAT (3 << 5)
	60
	61	enum lp8727_dev_id {
	62	ID_NONE,
	63	ID_TA,
	64	ID_DEDICATED_CHG,
	65	ID_USB_CHG,
	66	ID_USB_DS,
	67	ID_MAX,
	68	};
	69
	70	enum lp8727_chg_stat {
	71	PRECHG,
	72	CC,
	73	CV,
	74	EOC,
	75	};
	76
	77	struct lp8727_psy {
	78	struct power_supply ac;
	79	struct power_supply usb;
	80	struct power_supply batt;
	81	};
	82
	83	struct lp8727_chg {
	84	struct device *dev;
	85	struct i2c_client *client;
	86	struct mutex xfer_lock;
	87	struct delayed_work work;
2165c8a4 WK	88	struct lp8727_platform_data *pdata;
	89	struct lp8727_psy *psy;
	90	struct lp8727_chg_param *chg_parm;
	91	enum lp8727_dev_id devid;
60fd57e0	92	unsigned long debounce_jiffies;
d71fda01	93	int irq;
2165c8a4 WK	94	};
2165c8a4 WK	95
27aefa3b	96	static int lp8727_read_bytes(struct lp8727_chg pchg, u8 reg, u8 data, u8 len)
2165c8a4 WK	97	{
	98	s32 ret;
	99
	100	mutex_lock(&pchg->xfer_lock);
	101	ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data);
	102	mutex_unlock(&pchg->xfer_lock);
	103
	104	return (ret != len) ? -EIO : 0;
	105	}
	106
27aefa3b	107	static inline int lp8727_read_byte(struct lp8727_chg pchg, u8 reg, u8 data)
2165c8a4	108	{
27aefa3b KM	109	return lp8727_read_bytes(pchg, reg, data, 1);
	110	}
	111
	112	static int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data)
	113	{
	114	int ret;
2165c8a4 WK	115
2165c8a4 WK	116	mutex_lock(&pchg->xfer_lock);
27aefa3b	117	ret = i2c_smbus_write_byte_data(pchg->client, reg, data);
2165c8a4 WK	118	mutex_unlock(&pchg->xfer_lock);
	119
	120	return ret;
	121	}
	122
2165c8a4 WK	123	static int lp8727_is_charger_attached(const char *name, int id)
	124	{
	125	if (name) {
	126	if (!strcmp(name, "ac"))
	127	return (id == ID_TA \|\| id == ID_DEDICATED_CHG) ? 1 : 0;
	128	else if (!strcmp(name, "usb"))
	129	return (id == ID_USB_CHG) ? 1 : 0;
	130	}
	131
	132	return (id >= ID_TA && id <= ID_USB_CHG) ? 1 : 0;
	133	}
	134
7da6334e	135	static int lp8727_init_device(struct lp8727_chg *pchg)
2165c8a4 WK	136	{
2165c8a4 WK	137	u8 val;
7da6334e	138	int ret;
2165c8a4 WK	139
2165c8a4 WK	140	val = ID200_EN \| ADC_EN \| CP_EN;
27aefa3b	141	ret = lp8727_write_byte(pchg, CTRL1, val);
7da6334e KM	142	if (ret)
7da6334e KM	143	return ret;
2165c8a4 WK	144
2165c8a4 WK	145	val = INT_EN \| CHGDET_EN;
27aefa3b	146	ret = lp8727_write_byte(pchg, CTRL2, val);
7da6334e KM	147	if (ret)
	148	return ret;
	149
	150	return 0;
2165c8a4 WK	151	}
	152
	153	static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
	154	{
	155	u8 val;
27aefa3b	156	lp8727_read_byte(pchg, STATUS1, &val);
7336880e	157	return val & DCPORT;
2165c8a4 WK	158	}
	159
	160	static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
	161	{
	162	u8 val;
27aefa3b	163	lp8727_read_byte(pchg, STATUS1, &val);
7336880e	164	return val & CHPORT;
2165c8a4 WK	165	}
	166
	167	static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
	168	{
27aefa3b	169	lp8727_write_byte(pchg, SWCTRL, sw);
2165c8a4 WK	170	}
	171
	172	static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
	173	{
318cb389	174	struct lp8727_platform_data *pdata = pchg->pdata;
2165c8a4 WK	175	u8 devid = ID_NONE;
	176	u8 swctrl = SW_DM1_HiZ \| SW_DP2_HiZ;
	177
	178	switch (id) {
	179	case 0x5:
	180	devid = ID_TA;
318cb389	181	pchg->chg_parm = pdata ? pdata->ac : NULL;
2165c8a4 WK	182	break;
	183	case 0xB:
	184	if (lp8727_is_dedicated_charger(pchg)) {
318cb389	185	pchg->chg_parm = pdata ? pdata->ac : NULL;
2165c8a4 WK	186	devid = ID_DEDICATED_CHG;
2165c8a4 WK	187	} else if (lp8727_is_usb_charger(pchg)) {
318cb389	188	pchg->chg_parm = pdata ? pdata->usb : NULL;
2165c8a4 WK	189	devid = ID_USB_CHG;
	190	swctrl = SW_DM1_DM \| SW_DP2_DP;
	191	} else if (vbusin) {
	192	devid = ID_USB_DS;
	193	swctrl = SW_DM1_DM \| SW_DP2_DP;
	194	}
	195	break;
	196	default:
	197	devid = ID_NONE;
	198	pchg->chg_parm = NULL;
	199	break;
	200	}
	201
	202	pchg->devid = devid;
	203	lp8727_ctrl_switch(pchg, swctrl);
	204	}
	205
	206	static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
	207	{
	208	u8 val;
	209
27aefa3b	210	lp8727_read_byte(pchg, CTRL2, &val);
2165c8a4	211	val \|= CHGDET_EN;
27aefa3b	212	lp8727_write_byte(pchg, CTRL2, val);
2165c8a4 WK	213	}
	214
	215	static void lp8727_delayed_func(struct work_struct *_work)
	216	{
	217	u8 intstat[2], idno, vbus;
	218	struct lp8727_chg *pchg =
	219	container_of(_work, struct lp8727_chg, work.work);
	220
27aefa3b	221	if (lp8727_read_bytes(pchg, INT1, intstat, 2)) {
2165c8a4 WK	222	dev_err(pchg->dev, "can not read INT registers\n");
	223	return;
	224	}
	225
	226	idno = intstat[0] & IDNO;
	227	vbus = intstat[0] & VBUS;
	228
	229	lp8727_id_detection(pchg, idno, vbus);
	230	lp8727_enable_chgdet(pchg);
	231
	232	power_supply_changed(&pchg->psy->ac);
	233	power_supply_changed(&pchg->psy->usb);
	234	power_supply_changed(&pchg->psy->batt);
	235	}
	236
	237	static irqreturn_t lp8727_isr_func(int irq, void *ptr)
	238	{
	239	struct lp8727_chg *pchg = ptr;
2165c8a4	240
2a092582	241	schedule_delayed_work(&pchg->work, pchg->debounce_jiffies);
2165c8a4 WK	242	return IRQ_HANDLED;
	243	}
	244
d71fda01	245	static int lp8727_setup_irq(struct lp8727_chg *pchg)
2165c8a4	246	{
d71fda01 KM	247	int ret;
d71fda01 KM	248	int irq = pchg->client->irq;
60fd57e0 KM	249	unsigned delay_msec = pchg->pdata ? pchg->pdata->debounce_msec :
	250	DEFAULT_DEBOUNCE_MSEC;
	251
2165c8a4 WK	252	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);
2165c8a4 WK	253
d71fda01 KM	254	if (irq <= 0) {
	255	dev_warn(pchg->dev, "invalid irq number: %d\n", irq);
	256	return 0;
	257	}
60fd57e0	258
d71fda01	259	ret = request_threaded_irq(irq, NULL, lp8727_isr_func,
7c577c0d	260	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
d71fda01 KM	261	"lp8727_irq", pchg);
	262
	263	if (ret)
	264	return ret;
	265
	266	pchg->irq = irq;
	267	pchg->debounce_jiffies = msecs_to_jiffies(delay_msec);
	268
	269	return 0;
	270	}
	271
	272	static void lp8727_release_irq(struct lp8727_chg *pchg)
	273	{
	274	cancel_delayed_work_sync(&pchg->work);
	275
	276	if (pchg->irq)
	277	free_irq(pchg->irq, pchg);
2165c8a4 WK	278	}
	279
	280	static enum power_supply_property lp8727_charger_prop[] = {
	281	POWER_SUPPLY_PROP_ONLINE,
	282	};
	283
	284	static enum power_supply_property lp8727_battery_prop[] = {
	285	POWER_SUPPLY_PROP_STATUS,
	286	POWER_SUPPLY_PROP_HEALTH,
	287	POWER_SUPPLY_PROP_PRESENT,
	288	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	289	POWER_SUPPLY_PROP_CAPACITY,
	290	POWER_SUPPLY_PROP_TEMP,
	291	};
	292
	293	static char *battery_supplied_to[] = {
	294	"main_batt",
	295	};
	296
	297	static int lp8727_charger_get_property(struct power_supply *psy,
	298	enum power_supply_property psp,
	299	union power_supply_propval *val)
	300	{
	301	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	302
ce09affc	303	if (psp == POWER_SUPPLY_PROP_ONLINE)
2165c8a4 WK	304	val->intval = lp8727_is_charger_attached(psy->name,
2165c8a4 WK	305	pchg->devid);
2165c8a4 WK	306
	307	return 0;
	308	}
	309
	310	static int lp8727_battery_get_property(struct power_supply *psy,
	311	enum power_supply_property psp,
	312	union power_supply_propval *val)
	313	{
	314	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
318cb389	315	struct lp8727_platform_data *pdata = pchg->pdata;
2165c8a4 WK	316	u8 read;
	317
	318	switch (psp) {
	319	case POWER_SUPPLY_PROP_STATUS:
	320	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
27aefa3b	321	lp8727_read_byte(pchg, STATUS1, &read);
2165c8a4 WK	322	if (((read & CHGSTAT) >> 4) == EOC)
	323	val->intval = POWER_SUPPLY_STATUS_FULL;
	324	else
	325	val->intval = POWER_SUPPLY_STATUS_CHARGING;
	326	} else {
	327	val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
	328	}
	329	break;
	330	case POWER_SUPPLY_PROP_HEALTH:
27aefa3b	331	lp8727_read_byte(pchg, STATUS2, &read);
2165c8a4 WK	332	read = (read & TEMP_STAT) >> 5;
	333	if (read >= 0x1 && read <= 0x3)
	334	val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
	335	else
	336	val->intval = POWER_SUPPLY_HEALTH_GOOD;
	337	break;
	338	case POWER_SUPPLY_PROP_PRESENT:
318cb389 KM	339	if (!pdata)
	340	return -EINVAL;
	341
	342	if (pdata->get_batt_present)
2165c8a4 WK	343	val->intval = pchg->pdata->get_batt_present();
	344	break;
	345	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
318cb389 KM	346	if (!pdata)
	347	return -EINVAL;
	348
	349	if (pdata->get_batt_level)
2165c8a4 WK	350	val->intval = pchg->pdata->get_batt_level();
	351	break;
	352	case POWER_SUPPLY_PROP_CAPACITY:
318cb389 KM	353	if (!pdata)
	354	return -EINVAL;
	355
	356	if (pdata->get_batt_capacity)
2165c8a4 WK	357	val->intval = pchg->pdata->get_batt_capacity();
	358	break;
	359	case POWER_SUPPLY_PROP_TEMP:
318cb389 KM	360	if (!pdata)
	361	return -EINVAL;
	362
	363	if (pdata->get_batt_temp)
2165c8a4 WK	364	val->intval = pchg->pdata->get_batt_temp();
	365	break;
	366	default:
	367	break;
	368	}
	369
	370	return 0;
	371	}
	372
	373	static void lp8727_charger_changed(struct power_supply *psy)
	374	{
	375	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	376	u8 val;
	377	u8 eoc_level, ichg;
	378
	379	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
	380	if (pchg->chg_parm) {
	381	eoc_level = pchg->chg_parm->eoc_level;
	382	ichg = pchg->chg_parm->ichg;
	383	val = (ichg << 4) \| eoc_level;
27aefa3b	384	lp8727_write_byte(pchg, CHGCTRL2, val);
2165c8a4 WK	385	}
	386	}
	387	}
	388
	389	static int lp8727_register_psy(struct lp8727_chg *pchg)
	390	{
	391	struct lp8727_psy *psy;
	392
74727c57	393	psy = devm_kzalloc(pchg->dev, sizeof(*psy), GFP_KERNEL);
2165c8a4	394	if (!psy)
6297b5e5	395	return -ENOMEM;
2165c8a4 WK	396
	397	pchg->psy = psy;
	398
	399	psy->ac.name = "ac";
	400	psy->ac.type = POWER_SUPPLY_TYPE_MAINS;
	401	psy->ac.properties = lp8727_charger_prop;
	402	psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	403	psy->ac.get_property = lp8727_charger_get_property;
	404	psy->ac.supplied_to = battery_supplied_to;
	405	psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	406
	407	if (power_supply_register(pchg->dev, &psy->ac))
6297b5e5	408	goto err_psy_ac;
2165c8a4 WK	409
	410	psy->usb.name = "usb";
	411	psy->usb.type = POWER_SUPPLY_TYPE_USB;
	412	psy->usb.properties = lp8727_charger_prop;
	413	psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	414	psy->usb.get_property = lp8727_charger_get_property;
	415	psy->usb.supplied_to = battery_supplied_to;
	416	psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	417
	418	if (power_supply_register(pchg->dev, &psy->usb))
6297b5e5	419	goto err_psy_usb;
2165c8a4 WK	420
	421	psy->batt.name = "main_batt";
	422	psy->batt.type = POWER_SUPPLY_TYPE_BATTERY;
	423	psy->batt.properties = lp8727_battery_prop;
	424	psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop);
	425	psy->batt.get_property = lp8727_battery_get_property;
	426	psy->batt.external_power_changed = lp8727_charger_changed;
	427
	428	if (power_supply_register(pchg->dev, &psy->batt))
6297b5e5	429	goto err_psy_batt;
2165c8a4 WK	430
	431	return 0;
	432
6297b5e5 DN	433	err_psy_batt:
	434	power_supply_unregister(&psy->usb);
	435	err_psy_usb:
	436	power_supply_unregister(&psy->ac);
	437	err_psy_ac:
2165c8a4 WK	438	return -EPERM;
	439	}
	440
	441	static void lp8727_unregister_psy(struct lp8727_chg *pchg)
	442	{
	443	struct lp8727_psy *psy = pchg->psy;
	444
ce09affc KM	445	if (!psy)
	446	return;
	447
	448	power_supply_unregister(&psy->ac);
	449	power_supply_unregister(&psy->usb);
	450	power_supply_unregister(&psy->batt);
2165c8a4 WK	451	}
	452
	453	static int lp8727_probe(struct i2c_client cl, const struct i2c_device_id id)
	454	{
	455	struct lp8727_chg *pchg;
	456	int ret;
	457
998a8e7a KM	458	if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
	459	return -EIO;
	460
74727c57	461	pchg = devm_kzalloc(&cl->dev, sizeof(*pchg), GFP_KERNEL);
2165c8a4 WK	462	if (!pchg)
	463	return -ENOMEM;
	464
	465	pchg->client = cl;
	466	pchg->dev = &cl->dev;
	467	pchg->pdata = cl->dev.platform_data;
	468	i2c_set_clientdata(cl, pchg);
	469
	470	mutex_init(&pchg->xfer_lock);
	471
7da6334e KM	472	ret = lp8727_init_device(pchg);
	473	if (ret) {
	474	dev_err(pchg->dev, "i2c communication err: %d", ret);
fb9adc51	475	return ret;
7da6334e KM	476	}
7da6334e KM	477
fb9adc51	478	ret = lp8727_register_psy(pchg);
7da6334e	479	if (ret) {
fb9adc51 KM	480	dev_err(pchg->dev, "power supplies register err: %d", ret);
fb9adc51 KM	481	return ret;
7da6334e	482	}
2165c8a4	483
d71fda01	484	ret = lp8727_setup_irq(pchg);
7da6334e	485	if (ret) {
fb9adc51 KM	486	dev_err(pchg->dev, "irq handler err: %d", ret);
	487	lp8727_unregister_psy(pchg);
	488	return ret;
7da6334e	489	}
2165c8a4 WK	490
	491	return 0;
	492	}
	493
	494	static int __devexit lp8727_remove(struct i2c_client *cl)
	495	{
	496	struct lp8727_chg *pchg = i2c_get_clientdata(cl);
	497
d71fda01	498	lp8727_release_irq(pchg);
fb9adc51	499	lp8727_unregister_psy(pchg);
2165c8a4 WK	500	return 0;
	501	}
	502
	503	static const struct i2c_device_id lp8727_ids[] = {
	504	{"lp8727", 0},
455a0e2c	505	{ }
2165c8a4	506	};
e2c5f7db	507	MODULE_DEVICE_TABLE(i2c, lp8727_ids);
2165c8a4 WK	508
	509	static struct i2c_driver lp8727_driver = {
	510	.driver = {
	511	.name = "lp8727",
	512	},
	513	.probe = lp8727_probe,
	514	.remove = __devexit_p(lp8727_remove),
	515	.id_table = lp8727_ids,
	516	};
5ff92e7a	517	module_i2c_driver(lp8727_driver);
2165c8a4	518
e39b828f	519	MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
7336880e KM	520	MODULE_AUTHOR("Woogyom Kim <milo.kim@ti.com>, "
7336880e KM	521	"Daniel Jeong <daniel.jeong@ti.com>");
2165c8a4	522	MODULE_LICENSE("GPL");