[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 LP8727_CTRL1		0x1
#define LP8727_CTRL2		0x2
#define LP8727_SWCTRL		0x3
#define LP8727_INT1		0x4
#define LP8727_INT2		0x5
#define LP8727_STATUS1		0x6
#define LP8727_STATUS2		0x7
#define LP8727_CHGCTRL2		0x9

/* CTRL1 register */
#define LP8727_CP_EN		BIT(0)
#define LP8727_ADC_EN		BIT(1)
#define LP8727_ID200_EN		BIT(4)

/* CTRL2 register */
#define LP8727_CHGDET_EN	BIT(1)
#define LP8727_INT_EN		BIT(6)

/* SWCTRL register */
#define LP8727_SW_DM1_DM	(0x0 << 0)
#define LP8727_SW_DM1_HiZ	(0x7 << 0)
#define LP8727_SW_DP2_DP	(0x0 << 3)
#define LP8727_SW_DP2_HiZ	(0x7 << 3)

/* INT1 register */
#define LP8727_IDNO		(0xF << 0)
#define LP8727_VBUS		BIT(4)

/* STATUS1 register */
#define LP8727_CHGSTAT		(3 << 4)
#define LP8727_CHPORT		BIT(6)
#define LP8727_DCPORT		BIT(7)
#define LP8727_STAT_EOC		0x30

/* STATUS2 register */
#define LP8727_TEMP_STAT	(3 << 5)
#define LP8727_TEMP_SHIFT	5

/* CHGCTRL2 register */
#define LP8727_ICHG_SHIFT	4

enum lp8727_dev_id {
	LP8727_ID_NONE,
	LP8727_ID_TA,
	LP8727_ID_DEDICATED_CHG,
	LP8727_ID_USB_CHG,
	LP8727_ID_USB_DS,
	LP8727_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 bool lp8727_is_charger_attached(const char *name, int id)
{
	if (!strcmp(name, "ac"))
		return id == LP8727_ID_TA || id == LP8727_ID_DEDICATED_CHG;
	else if (!strcmp(name, "usb"))
		return id == LP8727_ID_USB_CHG;

	return id >= LP8727_ID_TA && id <= LP8727_ID_USB_CHG;
}

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, LP8727_INT1, intstat, LP8788_NUM_INTREGS);
	if (ret)
		return ret;


	val = LP8727_ID200_EN | LP8727_ADC_EN | LP8727_CP_EN;
	ret = lp8727_write_byte(pchg, LP8727_CTRL1, val);
	if (ret)
		return ret;

	val = LP8727_INT_EN | LP8727_CHGDET_EN;
	ret = lp8727_write_byte(pchg, LP8727_CTRL2, val);
	if (ret)
		return ret;

	return 0;
}

static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
{
	u8 val;
	lp8727_read_byte(pchg, LP8727_STATUS1, &val);
	return val & LP8727_DCPORT;
}

static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
{
	u8 val;
	lp8727_read_byte(pchg, LP8727_STATUS1, &val);
	return val & LP8727_CHPORT;
}

static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
{
	lp8727_write_byte(pchg, LP8727_SWCTRL, sw);
}

static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
{
	struct lp8727_platform_data *pdata = pchg->pdata;
	u8 devid = LP8727_ID_NONE;
	u8 swctrl = LP8727_SW_DM1_HiZ | LP8727_SW_DP2_HiZ;

	switch (id) {
	case 0x5:
		devid = LP8727_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 = LP8727_ID_DEDICATED_CHG;
		} else if (lp8727_is_usb_charger(pchg)) {
			pchg->chg_parm = pdata ? pdata->usb : NULL;
			devid = LP8727_ID_USB_CHG;
			swctrl = LP8727_SW_DM1_DM | LP8727_SW_DP2_DP;
		} else if (vbusin) {
			devid = LP8727_ID_USB_DS;
			swctrl = LP8727_SW_DM1_DM | LP8727_SW_DP2_DP;
		}
		break;
	default:
		devid = LP8727_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, LP8727_CTRL2, &val);
	val |= LP8727_CHGDET_EN;
	lp8727_write_byte(pchg, LP8727_CTRL2, val);
}

static void lp8727_delayed_func(struct work_struct *_work)
{
	u8 intstat[LP8788_NUM_INTREGS], idno, vbus;
	struct lp8727_chg *pchg =
	    container_of(_work, struct lp8727_chg, work.work);

	if (lp8727_read_bytes(pchg, LP8727_INT1, intstat, LP8788_NUM_INTREGS)) {
		dev_err(pchg->dev, "can not read INT registers\n");
		return;
	}

	idno = intstat[0] & LP8727_IDNO;
	vbus = intstat[0] & LP8727_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, LP8727_STATUS1, &read);

			val->intval = (read & LP8727_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, LP8727_STATUS2, &read);
		temp = (read & LP8727_TEMP_STAT) >> LP8727_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 << LP8727_ICHG_SHIFT) | eoc_level;
			lp8727_write_byte(pchg, LP8727_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
2165c8a4 WK	23	/* Registers */
6029719f KM	24	#define LP8727_CTRL1 0x1
	25	#define LP8727_CTRL2 0x2
	26	#define LP8727_SWCTRL 0x3
	27	#define LP8727_INT1 0x4
	28	#define LP8727_INT2 0x5
	29	#define LP8727_STATUS1 0x6
	30	#define LP8727_STATUS2 0x7
	31	#define LP8727_CHGCTRL2 0x9
2165c8a4 WK	32
2165c8a4 WK	33	/* CTRL1 register */
6029719f KM	34	#define LP8727_CP_EN BIT(0)
	35	#define LP8727_ADC_EN BIT(1)
	36	#define LP8727_ID200_EN BIT(4)
2165c8a4 WK	37
2165c8a4 WK	38	/* CTRL2 register */
6029719f KM	39	#define LP8727_CHGDET_EN BIT(1)
6029719f KM	40	#define LP8727_INT_EN BIT(6)
2165c8a4 WK	41
2165c8a4 WK	42	/* SWCTRL register */
6029719f KM	43	#define LP8727_SW_DM1_DM (0x0 << 0)
	44	#define LP8727_SW_DM1_HiZ (0x7 << 0)
	45	#define LP8727_SW_DP2_DP (0x0 << 3)
	46	#define LP8727_SW_DP2_HiZ (0x7 << 3)
2165c8a4 WK	47
2165c8a4 WK	48	/* INT1 register */
6029719f KM	49	#define LP8727_IDNO (0xF << 0)
6029719f KM	50	#define LP8727_VBUS BIT(4)
2165c8a4 WK	51
2165c8a4 WK	52	/* STATUS1 register */
6029719f KM	53	#define LP8727_CHGSTAT (3 << 4)
	54	#define LP8727_CHPORT BIT(6)
	55	#define LP8727_DCPORT BIT(7)
	56	#define LP8727_STAT_EOC 0x30
2165c8a4 WK	57
2165c8a4 WK	58	/* STATUS2 register */
6029719f KM	59	#define LP8727_TEMP_STAT (3 << 5)
6029719f KM	60	#define LP8727_TEMP_SHIFT 5
2165c8a4	61
18763a36 KM	62	/* CHGCTRL2 register */
	63	#define LP8727_ICHG_SHIFT 4
	64
2165c8a4	65	enum lp8727_dev_id {
6029719f KM	66	LP8727_ID_NONE,
	67	LP8727_ID_TA,
	68	LP8727_ID_DEDICATED_CHG,
	69	LP8727_ID_USB_CHG,
	70	LP8727_ID_USB_DS,
	71	LP8727_ID_MAX,
2165c8a4 WK	72	};
2165c8a4 WK	73
b1ad0796 KM	74	enum lp8727_die_temp {
	75	LP8788_TEMP_75C,
	76	LP8788_TEMP_95C,
	77	LP8788_TEMP_115C,
	78	LP8788_TEMP_135C,
	79	};
	80
2165c8a4 WK	81	struct lp8727_psy {
	82	struct power_supply ac;
	83	struct power_supply usb;
	84	struct power_supply batt;
	85	};
	86
	87	struct lp8727_chg {
	88	struct device *dev;
	89	struct i2c_client *client;
	90	struct mutex xfer_lock;
	91	struct delayed_work work;
2165c8a4 WK	92	struct lp8727_platform_data *pdata;
	93	struct lp8727_psy *psy;
	94	struct lp8727_chg_param *chg_parm;
	95	enum lp8727_dev_id devid;
60fd57e0	96	unsigned long debounce_jiffies;
d71fda01	97	int irq;
2165c8a4 WK	98	};
2165c8a4 WK	99
27aefa3b	100	static int lp8727_read_bytes(struct lp8727_chg pchg, u8 reg, u8 data, u8 len)
2165c8a4 WK	101	{
	102	s32 ret;
	103
	104	mutex_lock(&pchg->xfer_lock);
	105	ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data);
	106	mutex_unlock(&pchg->xfer_lock);
	107
	108	return (ret != len) ? -EIO : 0;
	109	}
	110
27aefa3b	111	static inline int lp8727_read_byte(struct lp8727_chg pchg, u8 reg, u8 data)
2165c8a4	112	{
27aefa3b KM	113	return lp8727_read_bytes(pchg, reg, data, 1);
	114	}
	115
	116	static int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data)
	117	{
	118	int ret;
2165c8a4 WK	119
2165c8a4 WK	120	mutex_lock(&pchg->xfer_lock);
27aefa3b	121	ret = i2c_smbus_write_byte_data(pchg->client, reg, data);
2165c8a4 WK	122	mutex_unlock(&pchg->xfer_lock);
	123
	124	return ret;
	125	}
	126
65272bac	127	static bool lp8727_is_charger_attached(const char *name, int id)
2165c8a4	128	{
65272bac KM	129	if (!strcmp(name, "ac"))
	130	return id == LP8727_ID_TA \|\| id == LP8727_ID_DEDICATED_CHG;
	131	else if (!strcmp(name, "usb"))
	132	return id == LP8727_ID_USB_CHG;
	133
	134	return id >= LP8727_ID_TA && id <= LP8727_ID_USB_CHG;
2165c8a4 WK	135	}
2165c8a4 WK	136
7da6334e	137	static int lp8727_init_device(struct lp8727_chg *pchg)
2165c8a4 WK	138	{
2165c8a4 WK	139	u8 val;
7da6334e	140	int ret;
638555d2 KM	141	u8 intstat[LP8788_NUM_INTREGS];
	142
	143	/* clear interrupts */
6029719f	144	ret = lp8727_read_bytes(pchg, LP8727_INT1, intstat, LP8788_NUM_INTREGS);
638555d2 KM	145	if (ret)
	146	return ret;
	147
2165c8a4	148
6029719f KM	149	val = LP8727_ID200_EN \| LP8727_ADC_EN \| LP8727_CP_EN;
6029719f KM	150	ret = lp8727_write_byte(pchg, LP8727_CTRL1, val);
7da6334e KM	151	if (ret)
7da6334e KM	152	return ret;
2165c8a4	153
6029719f KM	154	val = LP8727_INT_EN \| LP8727_CHGDET_EN;
6029719f KM	155	ret = lp8727_write_byte(pchg, LP8727_CTRL2, val);
7da6334e KM	156	if (ret)
	157	return ret;
	158
	159	return 0;
2165c8a4 WK	160	}
	161
	162	static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
	163	{
	164	u8 val;
6029719f KM	165	lp8727_read_byte(pchg, LP8727_STATUS1, &val);
6029719f KM	166	return val & LP8727_DCPORT;
2165c8a4 WK	167	}
	168
	169	static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
	170	{
	171	u8 val;
6029719f KM	172	lp8727_read_byte(pchg, LP8727_STATUS1, &val);
6029719f KM	173	return val & LP8727_CHPORT;
2165c8a4 WK	174	}
	175
	176	static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
	177	{
6029719f	178	lp8727_write_byte(pchg, LP8727_SWCTRL, sw);
2165c8a4 WK	179	}
	180
	181	static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
	182	{
318cb389	183	struct lp8727_platform_data *pdata = pchg->pdata;
6029719f KM	184	u8 devid = LP8727_ID_NONE;
6029719f KM	185	u8 swctrl = LP8727_SW_DM1_HiZ \| LP8727_SW_DP2_HiZ;
2165c8a4 WK	186
	187	switch (id) {
	188	case 0x5:
6029719f	189	devid = LP8727_ID_TA;
318cb389	190	pchg->chg_parm = pdata ? pdata->ac : NULL;
2165c8a4 WK	191	break;
	192	case 0xB:
	193	if (lp8727_is_dedicated_charger(pchg)) {
318cb389	194	pchg->chg_parm = pdata ? pdata->ac : NULL;
6029719f	195	devid = LP8727_ID_DEDICATED_CHG;
2165c8a4	196	} else if (lp8727_is_usb_charger(pchg)) {
318cb389	197	pchg->chg_parm = pdata ? pdata->usb : NULL;
6029719f KM	198	devid = LP8727_ID_USB_CHG;
6029719f KM	199	swctrl = LP8727_SW_DM1_DM \| LP8727_SW_DP2_DP;
2165c8a4	200	} else if (vbusin) {
6029719f KM	201	devid = LP8727_ID_USB_DS;
6029719f KM	202	swctrl = LP8727_SW_DM1_DM \| LP8727_SW_DP2_DP;
2165c8a4 WK	203	}
	204	break;
	205	default:
6029719f	206	devid = LP8727_ID_NONE;
2165c8a4 WK	207	pchg->chg_parm = NULL;
	208	break;
	209	}
	210
	211	pchg->devid = devid;
	212	lp8727_ctrl_switch(pchg, swctrl);
	213	}
	214
	215	static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
	216	{
	217	u8 val;
	218
6029719f KM	219	lp8727_read_byte(pchg, LP8727_CTRL2, &val);
	220	val \|= LP8727_CHGDET_EN;
	221	lp8727_write_byte(pchg, LP8727_CTRL2, val);
2165c8a4 WK	222	}
	223
	224	static void lp8727_delayed_func(struct work_struct *_work)
	225	{
18763a36	226	u8 intstat[LP8788_NUM_INTREGS], idno, vbus;
2165c8a4 WK	227	struct lp8727_chg *pchg =
	228	container_of(_work, struct lp8727_chg, work.work);
	229
18763a36	230	if (lp8727_read_bytes(pchg, LP8727_INT1, intstat, LP8788_NUM_INTREGS)) {
2165c8a4 WK	231	dev_err(pchg->dev, "can not read INT registers\n");
	232	return;
	233	}
	234
6029719f KM	235	idno = intstat[0] & LP8727_IDNO;
6029719f KM	236	vbus = intstat[0] & LP8727_VBUS;
2165c8a4 WK	237
	238	lp8727_id_detection(pchg, idno, vbus);
	239	lp8727_enable_chgdet(pchg);
	240
	241	power_supply_changed(&pchg->psy->ac);
	242	power_supply_changed(&pchg->psy->usb);
	243	power_supply_changed(&pchg->psy->batt);
	244	}
	245
	246	static irqreturn_t lp8727_isr_func(int irq, void *ptr)
	247	{
	248	struct lp8727_chg *pchg = ptr;
2165c8a4	249
2a092582	250	schedule_delayed_work(&pchg->work, pchg->debounce_jiffies);
2165c8a4 WK	251	return IRQ_HANDLED;
	252	}
	253
d71fda01	254	static int lp8727_setup_irq(struct lp8727_chg *pchg)
2165c8a4	255	{
d71fda01 KM	256	int ret;
d71fda01 KM	257	int irq = pchg->client->irq;
60fd57e0 KM	258	unsigned delay_msec = pchg->pdata ? pchg->pdata->debounce_msec :
	259	DEFAULT_DEBOUNCE_MSEC;
	260
2165c8a4 WK	261	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);
2165c8a4 WK	262
d71fda01 KM	263	if (irq <= 0) {
	264	dev_warn(pchg->dev, "invalid irq number: %d\n", irq);
	265	return 0;
	266	}
60fd57e0	267
d71fda01	268	ret = request_threaded_irq(irq, NULL, lp8727_isr_func,
7c577c0d	269	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
d71fda01 KM	270	"lp8727_irq", pchg);
	271
	272	if (ret)
	273	return ret;
	274
	275	pchg->irq = irq;
	276	pchg->debounce_jiffies = msecs_to_jiffies(delay_msec);
	277
	278	return 0;
	279	}
	280
	281	static void lp8727_release_irq(struct lp8727_chg *pchg)
	282	{
	283	cancel_delayed_work_sync(&pchg->work);
	284
	285	if (pchg->irq)
	286	free_irq(pchg->irq, pchg);
2165c8a4 WK	287	}
	288
	289	static enum power_supply_property lp8727_charger_prop[] = {
	290	POWER_SUPPLY_PROP_ONLINE,
	291	};
	292
	293	static enum power_supply_property lp8727_battery_prop[] = {
	294	POWER_SUPPLY_PROP_STATUS,
	295	POWER_SUPPLY_PROP_HEALTH,
	296	POWER_SUPPLY_PROP_PRESENT,
	297	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	298	POWER_SUPPLY_PROP_CAPACITY,
	299	POWER_SUPPLY_PROP_TEMP,
	300	};
	301
	302	static char *battery_supplied_to[] = {
	303	"main_batt",
	304	};
	305
	306	static int lp8727_charger_get_property(struct power_supply *psy,
	307	enum power_supply_property psp,
	308	union power_supply_propval *val)
	309	{
	310	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	311
ce09affc	312	if (psp == POWER_SUPPLY_PROP_ONLINE)
2165c8a4 WK	313	val->intval = lp8727_is_charger_attached(psy->name,
2165c8a4 WK	314	pchg->devid);
2165c8a4 WK	315
	316	return 0;
	317	}
	318
b1ad0796 KM	319	static bool lp8727_is_high_temperature(enum lp8727_die_temp temp)
	320	{
	321	switch (temp) {
	322	case LP8788_TEMP_95C:
	323	case LP8788_TEMP_115C:
	324	case LP8788_TEMP_135C:
	325	return true;
	326	default:
	327	return false;
	328	}
	329	}
	330
2165c8a4 WK	331	static int lp8727_battery_get_property(struct power_supply *psy,
	332	enum power_supply_property psp,
	333	union power_supply_propval *val)
	334	{
	335	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
318cb389	336	struct lp8727_platform_data *pdata = pchg->pdata;
b1ad0796	337	enum lp8727_die_temp temp;
2165c8a4 WK	338	u8 read;
	339
	340	switch (psp) {
	341	case POWER_SUPPLY_PROP_STATUS:
	342	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
6029719f	343	lp8727_read_byte(pchg, LP8727_STATUS1, &read);
faaae9bb	344
6029719f	345	val->intval = (read & LP8727_CHGSTAT) == LP8727_STAT_EOC ?
faaae9bb KM	346	POWER_SUPPLY_STATUS_FULL :
faaae9bb KM	347	POWER_SUPPLY_STATUS_CHARGING;
2165c8a4 WK	348	} else {
	349	val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
	350	}
	351	break;
	352	case POWER_SUPPLY_PROP_HEALTH:
6029719f KM	353	lp8727_read_byte(pchg, LP8727_STATUS2, &read);
6029719f KM	354	temp = (read & LP8727_TEMP_STAT) >> LP8727_TEMP_SHIFT;
b1ad0796 KM	355
	356	val->intval = lp8727_is_high_temperature(temp) ?
	357	POWER_SUPPLY_HEALTH_OVERHEAT :
	358	POWER_SUPPLY_HEALTH_GOOD;
2165c8a4 WK	359	break;
2165c8a4 WK	360	case POWER_SUPPLY_PROP_PRESENT:
318cb389 KM	361	if (!pdata)
	362	return -EINVAL;
	363
	364	if (pdata->get_batt_present)
2165c8a4 WK	365	val->intval = pchg->pdata->get_batt_present();
	366	break;
	367	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
318cb389 KM	368	if (!pdata)
	369	return -EINVAL;
	370
	371	if (pdata->get_batt_level)
2165c8a4 WK	372	val->intval = pchg->pdata->get_batt_level();
	373	break;
	374	case POWER_SUPPLY_PROP_CAPACITY:
318cb389 KM	375	if (!pdata)
	376	return -EINVAL;
	377
	378	if (pdata->get_batt_capacity)
2165c8a4 WK	379	val->intval = pchg->pdata->get_batt_capacity();
	380	break;
	381	case POWER_SUPPLY_PROP_TEMP:
318cb389 KM	382	if (!pdata)
	383	return -EINVAL;
	384
	385	if (pdata->get_batt_temp)
2165c8a4 WK	386	val->intval = pchg->pdata->get_batt_temp();
	387	break;
	388	default:
	389	break;
	390	}
	391
	392	return 0;
	393	}
	394
	395	static void lp8727_charger_changed(struct power_supply *psy)
	396	{
	397	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	398	u8 val;
	399	u8 eoc_level, ichg;
	400
	401	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
	402	if (pchg->chg_parm) {
	403	eoc_level = pchg->chg_parm->eoc_level;
	404	ichg = pchg->chg_parm->ichg;
18763a36	405	val = (ichg << LP8727_ICHG_SHIFT) \| eoc_level;
6029719f	406	lp8727_write_byte(pchg, LP8727_CHGCTRL2, val);
2165c8a4 WK	407	}
	408	}
	409	}
	410
	411	static int lp8727_register_psy(struct lp8727_chg *pchg)
	412	{
	413	struct lp8727_psy *psy;
	414
74727c57	415	psy = devm_kzalloc(pchg->dev, sizeof(*psy), GFP_KERNEL);
2165c8a4	416	if (!psy)
6297b5e5	417	return -ENOMEM;
2165c8a4 WK	418
	419	pchg->psy = psy;
	420
	421	psy->ac.name = "ac";
	422	psy->ac.type = POWER_SUPPLY_TYPE_MAINS;
	423	psy->ac.properties = lp8727_charger_prop;
	424	psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	425	psy->ac.get_property = lp8727_charger_get_property;
	426	psy->ac.supplied_to = battery_supplied_to;
	427	psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	428
	429	if (power_supply_register(pchg->dev, &psy->ac))
6297b5e5	430	goto err_psy_ac;
2165c8a4 WK	431
	432	psy->usb.name = "usb";
	433	psy->usb.type = POWER_SUPPLY_TYPE_USB;
	434	psy->usb.properties = lp8727_charger_prop;
	435	psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	436	psy->usb.get_property = lp8727_charger_get_property;
	437	psy->usb.supplied_to = battery_supplied_to;
	438	psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	439
	440	if (power_supply_register(pchg->dev, &psy->usb))
6297b5e5	441	goto err_psy_usb;
2165c8a4 WK	442
	443	psy->batt.name = "main_batt";
	444	psy->batt.type = POWER_SUPPLY_TYPE_BATTERY;
	445	psy->batt.properties = lp8727_battery_prop;
	446	psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop);
	447	psy->batt.get_property = lp8727_battery_get_property;
	448	psy->batt.external_power_changed = lp8727_charger_changed;
	449
	450	if (power_supply_register(pchg->dev, &psy->batt))
6297b5e5	451	goto err_psy_batt;
2165c8a4 WK	452
	453	return 0;
	454
6297b5e5 DN	455	err_psy_batt:
	456	power_supply_unregister(&psy->usb);
	457	err_psy_usb:
	458	power_supply_unregister(&psy->ac);
	459	err_psy_ac:
2165c8a4 WK	460	return -EPERM;
	461	}
	462
	463	static void lp8727_unregister_psy(struct lp8727_chg *pchg)
	464	{
	465	struct lp8727_psy *psy = pchg->psy;
	466
ce09affc KM	467	if (!psy)
	468	return;
	469
	470	power_supply_unregister(&psy->ac);
	471	power_supply_unregister(&psy->usb);
	472	power_supply_unregister(&psy->batt);
2165c8a4 WK	473	}
	474
	475	static int lp8727_probe(struct i2c_client cl, const struct i2c_device_id id)
	476	{
	477	struct lp8727_chg *pchg;
	478	int ret;
	479
998a8e7a KM	480	if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
	481	return -EIO;
	482
74727c57	483	pchg = devm_kzalloc(&cl->dev, sizeof(*pchg), GFP_KERNEL);
2165c8a4 WK	484	if (!pchg)
	485	return -ENOMEM;
	486
	487	pchg->client = cl;
	488	pchg->dev = &cl->dev;
	489	pchg->pdata = cl->dev.platform_data;
	490	i2c_set_clientdata(cl, pchg);
	491
	492	mutex_init(&pchg->xfer_lock);
	493
7da6334e KM	494	ret = lp8727_init_device(pchg);
	495	if (ret) {
	496	dev_err(pchg->dev, "i2c communication err: %d", ret);
fb9adc51	497	return ret;
7da6334e KM	498	}
7da6334e KM	499
fb9adc51	500	ret = lp8727_register_psy(pchg);
7da6334e	501	if (ret) {
fb9adc51 KM	502	dev_err(pchg->dev, "power supplies register err: %d", ret);
fb9adc51 KM	503	return ret;
7da6334e	504	}
2165c8a4	505
d71fda01	506	ret = lp8727_setup_irq(pchg);
7da6334e	507	if (ret) {
fb9adc51 KM	508	dev_err(pchg->dev, "irq handler err: %d", ret);
	509	lp8727_unregister_psy(pchg);
	510	return ret;
7da6334e	511	}
2165c8a4 WK	512
	513	return 0;
	514	}
	515
	516	static int __devexit lp8727_remove(struct i2c_client *cl)
	517	{
	518	struct lp8727_chg *pchg = i2c_get_clientdata(cl);
	519
d71fda01	520	lp8727_release_irq(pchg);
fb9adc51	521	lp8727_unregister_psy(pchg);
2165c8a4 WK	522	return 0;
	523	}
	524
	525	static const struct i2c_device_id lp8727_ids[] = {
	526	{"lp8727", 0},
455a0e2c	527	{ }
2165c8a4	528	};
e2c5f7db	529	MODULE_DEVICE_TABLE(i2c, lp8727_ids);
2165c8a4 WK	530
	531	static struct i2c_driver lp8727_driver = {
	532	.driver = {
	533	.name = "lp8727",
	534	},
	535	.probe = lp8727_probe,
	536	.remove = __devexit_p(lp8727_remove),
	537	.id_table = lp8727_ids,
	538	};
5ff92e7a	539	module_i2c_driver(lp8727_driver);
2165c8a4	540
e39b828f	541	MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
7336880e KM	542	MODULE_AUTHOR("Woogyom Kim <milo.kim@ti.com>, "
7336880e KM	543	"Daniel Jeong <daniel.jeong@ti.com>");
2165c8a4	544	MODULE_LICENSE("GPL");