[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)

/* 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_chg_stat {
	PRECHG,
	CC,
	CV,
	EOC,
};

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);
			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);
		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)
	58
	59	/* STATUS2 register */
	60	#define TEMP_STAT (3 << 5)
b1ad0796	61	#define TEMP_SHIFT 5
2165c8a4 WK	62
	63	enum lp8727_dev_id {
	64	ID_NONE,
	65	ID_TA,
	66	ID_DEDICATED_CHG,
	67	ID_USB_CHG,
	68	ID_USB_DS,
	69	ID_MAX,
	70	};
	71
	72	enum lp8727_chg_stat {
	73	PRECHG,
	74	CC,
	75	CV,
	76	EOC,
	77	};
	78
b1ad0796 KM	79	enum lp8727_die_temp {
	80	LP8788_TEMP_75C,
	81	LP8788_TEMP_95C,
	82	LP8788_TEMP_115C,
	83	LP8788_TEMP_135C,
	84	};
	85
2165c8a4 WK	86	struct lp8727_psy {
	87	struct power_supply ac;
	88	struct power_supply usb;
	89	struct power_supply batt;
	90	};
	91
	92	struct lp8727_chg {
	93	struct device *dev;
	94	struct i2c_client *client;
	95	struct mutex xfer_lock;
	96	struct delayed_work work;
2165c8a4 WK	97	struct lp8727_platform_data *pdata;
	98	struct lp8727_psy *psy;
	99	struct lp8727_chg_param *chg_parm;
	100	enum lp8727_dev_id devid;
60fd57e0	101	unsigned long debounce_jiffies;
d71fda01	102	int irq;
2165c8a4 WK	103	};
2165c8a4 WK	104
27aefa3b	105	static int lp8727_read_bytes(struct lp8727_chg pchg, u8 reg, u8 data, u8 len)
2165c8a4 WK	106	{
	107	s32 ret;
	108
	109	mutex_lock(&pchg->xfer_lock);
	110	ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data);
	111	mutex_unlock(&pchg->xfer_lock);
	112
	113	return (ret != len) ? -EIO : 0;
	114	}
	115
27aefa3b	116	static inline int lp8727_read_byte(struct lp8727_chg pchg, u8 reg, u8 data)
2165c8a4	117	{
27aefa3b KM	118	return lp8727_read_bytes(pchg, reg, data, 1);
	119	}
	120
	121	static int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data)
	122	{
	123	int ret;
2165c8a4 WK	124
2165c8a4 WK	125	mutex_lock(&pchg->xfer_lock);
27aefa3b	126	ret = i2c_smbus_write_byte_data(pchg->client, reg, data);
2165c8a4 WK	127	mutex_unlock(&pchg->xfer_lock);
	128
	129	return ret;
	130	}
	131
2165c8a4 WK	132	static int lp8727_is_charger_attached(const char *name, int id)
	133	{
	134	if (name) {
	135	if (!strcmp(name, "ac"))
	136	return (id == ID_TA \|\| id == ID_DEDICATED_CHG) ? 1 : 0;
	137	else if (!strcmp(name, "usb"))
	138	return (id == ID_USB_CHG) ? 1 : 0;
	139	}
	140
	141	return (id >= ID_TA && id <= ID_USB_CHG) ? 1 : 0;
	142	}
	143
7da6334e	144	static int lp8727_init_device(struct lp8727_chg *pchg)
2165c8a4 WK	145	{
2165c8a4 WK	146	u8 val;
7da6334e	147	int ret;
638555d2 KM	148	u8 intstat[LP8788_NUM_INTREGS];
	149
	150	/* clear interrupts */
	151	ret = lp8727_read_bytes(pchg, INT1, intstat, LP8788_NUM_INTREGS);
	152	if (ret)
	153	return ret;
	154
2165c8a4 WK	155
2165c8a4 WK	156	val = ID200_EN \| ADC_EN \| CP_EN;
27aefa3b	157	ret = lp8727_write_byte(pchg, CTRL1, val);
7da6334e KM	158	if (ret)
7da6334e KM	159	return ret;
2165c8a4 WK	160
2165c8a4 WK	161	val = INT_EN \| CHGDET_EN;
27aefa3b	162	ret = lp8727_write_byte(pchg, CTRL2, val);
7da6334e KM	163	if (ret)
	164	return ret;
	165
	166	return 0;
2165c8a4 WK	167	}
	168
	169	static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
	170	{
	171	u8 val;
27aefa3b	172	lp8727_read_byte(pchg, STATUS1, &val);
7336880e	173	return val & DCPORT;
2165c8a4 WK	174	}
	175
	176	static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
	177	{
	178	u8 val;
27aefa3b	179	lp8727_read_byte(pchg, STATUS1, &val);
7336880e	180	return val & CHPORT;
2165c8a4 WK	181	}
	182
	183	static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
	184	{
27aefa3b	185	lp8727_write_byte(pchg, SWCTRL, sw);
2165c8a4 WK	186	}
	187
	188	static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
	189	{
318cb389	190	struct lp8727_platform_data *pdata = pchg->pdata;
2165c8a4 WK	191	u8 devid = ID_NONE;
	192	u8 swctrl = SW_DM1_HiZ \| SW_DP2_HiZ;
	193
	194	switch (id) {
	195	case 0x5:
	196	devid = ID_TA;
318cb389	197	pchg->chg_parm = pdata ? pdata->ac : NULL;
2165c8a4 WK	198	break;
	199	case 0xB:
	200	if (lp8727_is_dedicated_charger(pchg)) {
318cb389	201	pchg->chg_parm = pdata ? pdata->ac : NULL;
2165c8a4 WK	202	devid = ID_DEDICATED_CHG;
2165c8a4 WK	203	} else if (lp8727_is_usb_charger(pchg)) {
318cb389	204	pchg->chg_parm = pdata ? pdata->usb : NULL;
2165c8a4 WK	205	devid = ID_USB_CHG;
	206	swctrl = SW_DM1_DM \| SW_DP2_DP;
	207	} else if (vbusin) {
	208	devid = ID_USB_DS;
	209	swctrl = SW_DM1_DM \| SW_DP2_DP;
	210	}
	211	break;
	212	default:
	213	devid = ID_NONE;
	214	pchg->chg_parm = NULL;
	215	break;
	216	}
	217
	218	pchg->devid = devid;
	219	lp8727_ctrl_switch(pchg, swctrl);
	220	}
	221
	222	static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
	223	{
	224	u8 val;
	225
27aefa3b	226	lp8727_read_byte(pchg, CTRL2, &val);
2165c8a4	227	val \|= CHGDET_EN;
27aefa3b	228	lp8727_write_byte(pchg, CTRL2, val);
2165c8a4 WK	229	}
	230
	231	static void lp8727_delayed_func(struct work_struct *_work)
	232	{
	233	u8 intstat[2], idno, vbus;
	234	struct lp8727_chg *pchg =
	235	container_of(_work, struct lp8727_chg, work.work);
	236
27aefa3b	237	if (lp8727_read_bytes(pchg, INT1, intstat, 2)) {
2165c8a4 WK	238	dev_err(pchg->dev, "can not read INT registers\n");
	239	return;
	240	}
	241
	242	idno = intstat[0] & IDNO;
	243	vbus = intstat[0] & VBUS;
	244
	245	lp8727_id_detection(pchg, idno, vbus);
	246	lp8727_enable_chgdet(pchg);
	247
	248	power_supply_changed(&pchg->psy->ac);
	249	power_supply_changed(&pchg->psy->usb);
	250	power_supply_changed(&pchg->psy->batt);
	251	}
	252
	253	static irqreturn_t lp8727_isr_func(int irq, void *ptr)
	254	{
	255	struct lp8727_chg *pchg = ptr;
2165c8a4	256
2a092582	257	schedule_delayed_work(&pchg->work, pchg->debounce_jiffies);
2165c8a4 WK	258	return IRQ_HANDLED;
	259	}
	260
d71fda01	261	static int lp8727_setup_irq(struct lp8727_chg *pchg)
2165c8a4	262	{
d71fda01 KM	263	int ret;
d71fda01 KM	264	int irq = pchg->client->irq;
60fd57e0 KM	265	unsigned delay_msec = pchg->pdata ? pchg->pdata->debounce_msec :
	266	DEFAULT_DEBOUNCE_MSEC;
	267
2165c8a4 WK	268	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);
2165c8a4 WK	269
d71fda01 KM	270	if (irq <= 0) {
	271	dev_warn(pchg->dev, "invalid irq number: %d\n", irq);
	272	return 0;
	273	}
60fd57e0	274
d71fda01	275	ret = request_threaded_irq(irq, NULL, lp8727_isr_func,
7c577c0d	276	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
d71fda01 KM	277	"lp8727_irq", pchg);
	278
	279	if (ret)
	280	return ret;
	281
	282	pchg->irq = irq;
	283	pchg->debounce_jiffies = msecs_to_jiffies(delay_msec);
	284
	285	return 0;
	286	}
	287
	288	static void lp8727_release_irq(struct lp8727_chg *pchg)
	289	{
	290	cancel_delayed_work_sync(&pchg->work);
	291
	292	if (pchg->irq)
	293	free_irq(pchg->irq, pchg);
2165c8a4 WK	294	}
	295
	296	static enum power_supply_property lp8727_charger_prop[] = {
	297	POWER_SUPPLY_PROP_ONLINE,
	298	};
	299
	300	static enum power_supply_property lp8727_battery_prop[] = {
	301	POWER_SUPPLY_PROP_STATUS,
	302	POWER_SUPPLY_PROP_HEALTH,
	303	POWER_SUPPLY_PROP_PRESENT,
	304	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	305	POWER_SUPPLY_PROP_CAPACITY,
	306	POWER_SUPPLY_PROP_TEMP,
	307	};
	308
	309	static char *battery_supplied_to[] = {
	310	"main_batt",
	311	};
	312
	313	static int lp8727_charger_get_property(struct power_supply *psy,
	314	enum power_supply_property psp,
	315	union power_supply_propval *val)
	316	{
	317	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	318
ce09affc	319	if (psp == POWER_SUPPLY_PROP_ONLINE)
2165c8a4 WK	320	val->intval = lp8727_is_charger_attached(psy->name,
2165c8a4 WK	321	pchg->devid);
2165c8a4 WK	322
	323	return 0;
	324	}
	325
b1ad0796 KM	326	static bool lp8727_is_high_temperature(enum lp8727_die_temp temp)
	327	{
	328	switch (temp) {
	329	case LP8788_TEMP_95C:
	330	case LP8788_TEMP_115C:
	331	case LP8788_TEMP_135C:
	332	return true;
	333	default:
	334	return false;
	335	}
	336	}
	337
2165c8a4 WK	338	static int lp8727_battery_get_property(struct power_supply *psy,
	339	enum power_supply_property psp,
	340	union power_supply_propval *val)
	341	{
	342	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
318cb389	343	struct lp8727_platform_data *pdata = pchg->pdata;
b1ad0796	344	enum lp8727_die_temp temp;
2165c8a4 WK	345	u8 read;
	346
	347	switch (psp) {
	348	case POWER_SUPPLY_PROP_STATUS:
	349	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
27aefa3b	350	lp8727_read_byte(pchg, STATUS1, &read);
2165c8a4 WK	351	if (((read & CHGSTAT) >> 4) == EOC)
	352	val->intval = POWER_SUPPLY_STATUS_FULL;
	353	else
	354	val->intval = POWER_SUPPLY_STATUS_CHARGING;
	355	} else {
	356	val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
	357	}
	358	break;
	359	case POWER_SUPPLY_PROP_HEALTH:
27aefa3b	360	lp8727_read_byte(pchg, STATUS2, &read);
b1ad0796 KM	361	temp = (read & TEMP_STAT) >> TEMP_SHIFT;
	362
	363	val->intval = lp8727_is_high_temperature(temp) ?
	364	POWER_SUPPLY_HEALTH_OVERHEAT :
	365	POWER_SUPPLY_HEALTH_GOOD;
2165c8a4 WK	366	break;
2165c8a4 WK	367	case POWER_SUPPLY_PROP_PRESENT:
318cb389 KM	368	if (!pdata)
	369	return -EINVAL;
	370
	371	if (pdata->get_batt_present)
2165c8a4 WK	372	val->intval = pchg->pdata->get_batt_present();
	373	break;
	374	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
318cb389 KM	375	if (!pdata)
	376	return -EINVAL;
	377
	378	if (pdata->get_batt_level)
2165c8a4 WK	379	val->intval = pchg->pdata->get_batt_level();
	380	break;
	381	case POWER_SUPPLY_PROP_CAPACITY:
318cb389 KM	382	if (!pdata)
	383	return -EINVAL;
	384
	385	if (pdata->get_batt_capacity)
2165c8a4 WK	386	val->intval = pchg->pdata->get_batt_capacity();
	387	break;
	388	case POWER_SUPPLY_PROP_TEMP:
318cb389 KM	389	if (!pdata)
	390	return -EINVAL;
	391
	392	if (pdata->get_batt_temp)
2165c8a4 WK	393	val->intval = pchg->pdata->get_batt_temp();
	394	break;
	395	default:
	396	break;
	397	}
	398
	399	return 0;
	400	}
	401
	402	static void lp8727_charger_changed(struct power_supply *psy)
	403	{
	404	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	405	u8 val;
	406	u8 eoc_level, ichg;
	407
	408	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
	409	if (pchg->chg_parm) {
	410	eoc_level = pchg->chg_parm->eoc_level;
	411	ichg = pchg->chg_parm->ichg;
	412	val = (ichg << 4) \| eoc_level;
27aefa3b	413	lp8727_write_byte(pchg, CHGCTRL2, val);
2165c8a4 WK	414	}
	415	}
	416	}
	417
	418	static int lp8727_register_psy(struct lp8727_chg *pchg)
	419	{
	420	struct lp8727_psy *psy;
	421
74727c57	422	psy = devm_kzalloc(pchg->dev, sizeof(*psy), GFP_KERNEL);
2165c8a4	423	if (!psy)
6297b5e5	424	return -ENOMEM;
2165c8a4 WK	425
	426	pchg->psy = psy;
	427
	428	psy->ac.name = "ac";
	429	psy->ac.type = POWER_SUPPLY_TYPE_MAINS;
	430	psy->ac.properties = lp8727_charger_prop;
	431	psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	432	psy->ac.get_property = lp8727_charger_get_property;
	433	psy->ac.supplied_to = battery_supplied_to;
	434	psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	435
	436	if (power_supply_register(pchg->dev, &psy->ac))
6297b5e5	437	goto err_psy_ac;
2165c8a4 WK	438
	439	psy->usb.name = "usb";
	440	psy->usb.type = POWER_SUPPLY_TYPE_USB;
	441	psy->usb.properties = lp8727_charger_prop;
	442	psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	443	psy->usb.get_property = lp8727_charger_get_property;
	444	psy->usb.supplied_to = battery_supplied_to;
	445	psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	446
	447	if (power_supply_register(pchg->dev, &psy->usb))
6297b5e5	448	goto err_psy_usb;
2165c8a4 WK	449
	450	psy->batt.name = "main_batt";
	451	psy->batt.type = POWER_SUPPLY_TYPE_BATTERY;
	452	psy->batt.properties = lp8727_battery_prop;
	453	psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop);
	454	psy->batt.get_property = lp8727_battery_get_property;
	455	psy->batt.external_power_changed = lp8727_charger_changed;
	456
	457	if (power_supply_register(pchg->dev, &psy->batt))
6297b5e5	458	goto err_psy_batt;
2165c8a4 WK	459
	460	return 0;
	461
6297b5e5 DN	462	err_psy_batt:
	463	power_supply_unregister(&psy->usb);
	464	err_psy_usb:
	465	power_supply_unregister(&psy->ac);
	466	err_psy_ac:
2165c8a4 WK	467	return -EPERM;
	468	}
	469
	470	static void lp8727_unregister_psy(struct lp8727_chg *pchg)
	471	{
	472	struct lp8727_psy *psy = pchg->psy;
	473
ce09affc KM	474	if (!psy)
	475	return;
	476
	477	power_supply_unregister(&psy->ac);
	478	power_supply_unregister(&psy->usb);
	479	power_supply_unregister(&psy->batt);
2165c8a4 WK	480	}
	481
	482	static int lp8727_probe(struct i2c_client cl, const struct i2c_device_id id)
	483	{
	484	struct lp8727_chg *pchg;
	485	int ret;
	486
998a8e7a KM	487	if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
	488	return -EIO;
	489
74727c57	490	pchg = devm_kzalloc(&cl->dev, sizeof(*pchg), GFP_KERNEL);
2165c8a4 WK	491	if (!pchg)
	492	return -ENOMEM;
	493
	494	pchg->client = cl;
	495	pchg->dev = &cl->dev;
	496	pchg->pdata = cl->dev.platform_data;
	497	i2c_set_clientdata(cl, pchg);
	498
	499	mutex_init(&pchg->xfer_lock);
	500
7da6334e KM	501	ret = lp8727_init_device(pchg);
	502	if (ret) {
	503	dev_err(pchg->dev, "i2c communication err: %d", ret);
fb9adc51	504	return ret;
7da6334e KM	505	}
7da6334e KM	506
fb9adc51	507	ret = lp8727_register_psy(pchg);
7da6334e	508	if (ret) {
fb9adc51 KM	509	dev_err(pchg->dev, "power supplies register err: %d", ret);
fb9adc51 KM	510	return ret;
7da6334e	511	}
2165c8a4	512
d71fda01	513	ret = lp8727_setup_irq(pchg);
7da6334e	514	if (ret) {
fb9adc51 KM	515	dev_err(pchg->dev, "irq handler err: %d", ret);
	516	lp8727_unregister_psy(pchg);
	517	return ret;
7da6334e	518	}
2165c8a4 WK	519
	520	return 0;
	521	}
	522
	523	static int __devexit lp8727_remove(struct i2c_client *cl)
	524	{
	525	struct lp8727_chg *pchg = i2c_get_clientdata(cl);
	526
d71fda01	527	lp8727_release_irq(pchg);
fb9adc51	528	lp8727_unregister_psy(pchg);
2165c8a4 WK	529	return 0;
	530	}
	531
	532	static const struct i2c_device_id lp8727_ids[] = {
	533	{"lp8727", 0},
455a0e2c	534	{ }
2165c8a4	535	};
e2c5f7db	536	MODULE_DEVICE_TABLE(i2c, lp8727_ids);
2165c8a4 WK	537
	538	static struct i2c_driver lp8727_driver = {
	539	.driver = {
	540	.name = "lp8727",
	541	},
	542	.probe = lp8727_probe,
	543	.remove = __devexit_p(lp8727_remove),
	544	.id_table = lp8727_ids,
	545	};
5ff92e7a	546	module_i2c_driver(lp8727_driver);
2165c8a4	547
e39b828f	548	MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
7336880e KM	549	MODULE_AUTHOR("Woogyom Kim <milo.kim@ti.com>, "
7336880e KM	550	"Daniel Jeong <daniel.jeong@ti.com>");
2165c8a4	551	MODULE_LICENSE("GPL");