[linux-2.6-block.git] / drivers / power / tosa_battery.c

/*
 * Battery and Power Management code for the Sharp SL-6000x
 *
 * Copyright (c) 2005 Dirk Opfer
 * Copyright (c) 2008 Dmitry Baryshkov
 *
 * 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/kernel.h>
#include <linux/module.h>
#include <linux/power_supply.h>
#include <linux/wm97xx.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>

#include <asm/mach-types.h>
#include <mach/tosa.h>

static DEFINE_MUTEX(bat_lock); /* protects gpio pins */
static struct work_struct bat_work;

struct tosa_bat {
	int status;
	struct power_supply *psy;
	int full_chrg;

	struct mutex work_lock; /* protects data */

	bool (*is_present)(struct tosa_bat *bat);
	int gpio_full;
	int gpio_charge_off;

	int technology;

	int gpio_bat;
	int adc_bat;
	int adc_bat_divider;
	int bat_max;
	int bat_min;

	int gpio_temp;
	int adc_temp;
	int adc_temp_divider;
};

static struct tosa_bat tosa_bat_main;
static struct tosa_bat tosa_bat_jacket;

static unsigned long tosa_read_bat(struct tosa_bat *bat)
{
	unsigned long value = 0;

	if (bat->gpio_bat < 0 || bat->adc_bat < 0)
		return 0;

	mutex_lock(&bat_lock);
	gpio_set_value(bat->gpio_bat, 1);
	msleep(5);
	value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent),
			bat->adc_bat);
	gpio_set_value(bat->gpio_bat, 0);
	mutex_unlock(&bat_lock);

	value = value * 1000000 / bat->adc_bat_divider;

	return value;
}

static unsigned long tosa_read_temp(struct tosa_bat *bat)
{
	unsigned long value = 0;

	if (bat->gpio_temp < 0 || bat->adc_temp < 0)
		return 0;

	mutex_lock(&bat_lock);
	gpio_set_value(bat->gpio_temp, 1);
	msleep(5);
	value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent),
			bat->adc_temp);
	gpio_set_value(bat->gpio_temp, 0);
	mutex_unlock(&bat_lock);

	value = value * 10000 / bat->adc_temp_divider;

	return value;
}

static int tosa_bat_get_property(struct power_supply *psy,
			    enum power_supply_property psp,
			    union power_supply_propval *val)
{
	int ret = 0;
	struct tosa_bat *bat = power_supply_get_drvdata(psy);

	if (bat->is_present && !bat->is_present(bat)
			&& psp != POWER_SUPPLY_PROP_PRESENT) {
		return -ENODEV;
	}

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = bat->status;
		break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
		val->intval = bat->technology;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		val->intval = tosa_read_bat(bat);
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
		if (bat->full_chrg == -1)
			val->intval = bat->bat_max;
		else
			val->intval = bat->full_chrg;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
		val->intval = bat->bat_max;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
		val->intval = bat->bat_min;
		break;
	case POWER_SUPPLY_PROP_TEMP:
		val->intval = tosa_read_temp(bat);
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		val->intval = bat->is_present ? bat->is_present(bat) : 1;
		break;
	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}

static bool tosa_jacket_bat_is_present(struct tosa_bat *bat)
{
	return gpio_get_value(TOSA_GPIO_JACKET_DETECT) == 0;
}

static void tosa_bat_external_power_changed(struct power_supply *psy)
{
	schedule_work(&bat_work);
}

static irqreturn_t tosa_bat_gpio_isr(int irq, void *data)
{
	pr_info("tosa_bat_gpio irq\n");
	schedule_work(&bat_work);
	return IRQ_HANDLED;
}

static void tosa_bat_update(struct tosa_bat *bat)
{
	int old;
	struct power_supply *psy = bat->psy;

	mutex_lock(&bat->work_lock);

	old = bat->status;

	if (bat->is_present && !bat->is_present(bat)) {
		printk(KERN_NOTICE "%s not present\n", psy->desc->name);
		bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
		bat->full_chrg = -1;
	} else if (power_supply_am_i_supplied(psy)) {
		if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) {
			gpio_set_value(bat->gpio_charge_off, 0);
			mdelay(15);
		}

		if (gpio_get_value(bat->gpio_full)) {
			if (old == POWER_SUPPLY_STATUS_CHARGING ||
					bat->full_chrg == -1)
				bat->full_chrg = tosa_read_bat(bat);

			gpio_set_value(bat->gpio_charge_off, 1);
			bat->status = POWER_SUPPLY_STATUS_FULL;
		} else {
			gpio_set_value(bat->gpio_charge_off, 0);
			bat->status = POWER_SUPPLY_STATUS_CHARGING;
		}
	} else {
		gpio_set_value(bat->gpio_charge_off, 1);
		bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
	}

	if (old != bat->status)
		power_supply_changed(psy);

	mutex_unlock(&bat->work_lock);
}

static void tosa_bat_work(struct work_struct *work)
{
	tosa_bat_update(&tosa_bat_main);
	tosa_bat_update(&tosa_bat_jacket);
}


static enum power_supply_property tosa_bat_main_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_MAX,
	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	POWER_SUPPLY_PROP_TEMP,
	POWER_SUPPLY_PROP_PRESENT,
};

static enum power_supply_property tosa_bat_bu_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	POWER_SUPPLY_PROP_PRESENT,
};

static const struct power_supply_desc tosa_bat_main_desc = {
	.name		= "main-battery",
	.type		= POWER_SUPPLY_TYPE_BATTERY,
	.properties	= tosa_bat_main_props,
	.num_properties	= ARRAY_SIZE(tosa_bat_main_props),
	.get_property	= tosa_bat_get_property,
	.external_power_changed = tosa_bat_external_power_changed,
	.use_for_apm	= 1,
};

static const struct power_supply_desc tosa_bat_jacket_desc = {
	.name		= "jacket-battery",
	.type		= POWER_SUPPLY_TYPE_BATTERY,
	.properties	= tosa_bat_main_props,
	.num_properties	= ARRAY_SIZE(tosa_bat_main_props),
	.get_property	= tosa_bat_get_property,
	.external_power_changed = tosa_bat_external_power_changed,
};

static const struct power_supply_desc tosa_bat_bu_desc = {
	.name		= "backup-battery",
	.type		= POWER_SUPPLY_TYPE_BATTERY,
	.properties	= tosa_bat_bu_props,
	.num_properties	= ARRAY_SIZE(tosa_bat_bu_props),
	.get_property	= tosa_bat_get_property,
	.external_power_changed = tosa_bat_external_power_changed,
};

static struct tosa_bat tosa_bat_main = {
	.status = POWER_SUPPLY_STATUS_DISCHARGING,
	.full_chrg = -1,
	.psy = NULL,

	.gpio_full = TOSA_GPIO_BAT0_CRG,
	.gpio_charge_off = TOSA_GPIO_CHARGE_OFF,

	.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,

	.gpio_bat = TOSA_GPIO_BAT0_V_ON,
	.adc_bat = WM97XX_AUX_ID3,
	.adc_bat_divider = 414,
	.bat_max = 4310000,
	.bat_min = 1551 * 1000000 / 414,

	.gpio_temp = TOSA_GPIO_BAT1_TH_ON,
	.adc_temp = WM97XX_AUX_ID2,
	.adc_temp_divider = 10000,
};

static struct tosa_bat tosa_bat_jacket = {
	.status = POWER_SUPPLY_STATUS_DISCHARGING,
	.full_chrg = -1,
	.psy = NULL,

	.is_present = tosa_jacket_bat_is_present,
	.gpio_full = TOSA_GPIO_BAT1_CRG,
	.gpio_charge_off = TOSA_GPIO_CHARGE_OFF_JC,

	.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,

	.gpio_bat = TOSA_GPIO_BAT1_V_ON,
	.adc_bat = WM97XX_AUX_ID3,
	.adc_bat_divider = 414,
	.bat_max = 4310000,
	.bat_min = 1551 * 1000000 / 414,

	.gpio_temp = TOSA_GPIO_BAT0_TH_ON,
	.adc_temp = WM97XX_AUX_ID2,
	.adc_temp_divider = 10000,
};

static struct tosa_bat tosa_bat_bu = {
	.status = POWER_SUPPLY_STATUS_UNKNOWN,
	.full_chrg = -1,
	.psy = NULL,

	.gpio_full = -1,
	.gpio_charge_off = -1,

	.technology = POWER_SUPPLY_TECHNOLOGY_LiMn,

	.gpio_bat = TOSA_GPIO_BU_CHRG_ON,
	.adc_bat = WM97XX_AUX_ID4,
	.adc_bat_divider = 1266,

	.gpio_temp = -1,
	.adc_temp = -1,
	.adc_temp_divider = -1,
};

static struct gpio tosa_bat_gpios[] = {
	{ TOSA_GPIO_CHARGE_OFF,	   GPIOF_OUT_INIT_HIGH, "main charge off" },
	{ TOSA_GPIO_CHARGE_OFF_JC, GPIOF_OUT_INIT_HIGH, "jacket charge off" },
	{ TOSA_GPIO_BAT_SW_ON,	   GPIOF_OUT_INIT_LOW,	"battery switch" },
	{ TOSA_GPIO_BAT0_V_ON,	   GPIOF_OUT_INIT_LOW,	"main battery" },
	{ TOSA_GPIO_BAT1_V_ON,	   GPIOF_OUT_INIT_LOW,	"jacket battery" },
	{ TOSA_GPIO_BAT1_TH_ON,	   GPIOF_OUT_INIT_LOW,	"main battery temp" },
	{ TOSA_GPIO_BAT0_TH_ON,	   GPIOF_OUT_INIT_LOW,	"jacket battery temp" },
	{ TOSA_GPIO_BU_CHRG_ON,	   GPIOF_OUT_INIT_LOW,	"backup battery" },
	{ TOSA_GPIO_BAT0_CRG,	   GPIOF_IN,		"main battery full" },
	{ TOSA_GPIO_BAT1_CRG,	   GPIOF_IN,		"jacket battery full" },
	{ TOSA_GPIO_BAT0_LOW,	   GPIOF_IN,		"main battery low" },
	{ TOSA_GPIO_BAT1_LOW,	   GPIOF_IN,		"jacket battery low" },
	{ TOSA_GPIO_JACKET_DETECT, GPIOF_IN,		"jacket detect" },
};

#ifdef CONFIG_PM
static int tosa_bat_suspend(struct platform_device *dev, pm_message_t state)
{
	/* flush all pending status updates */
	flush_work(&bat_work);
	return 0;
}

static int tosa_bat_resume(struct platform_device *dev)
{
	/* things may have changed while we were away */
	schedule_work(&bat_work);
	return 0;
}
#else
#define tosa_bat_suspend NULL
#define tosa_bat_resume NULL
#endif

static int tosa_bat_probe(struct platform_device *dev)
{
	int ret;
	struct power_supply_config main_psy_cfg = {},
				   jacket_psy_cfg = {},
				   bu_psy_cfg = {};

	if (!machine_is_tosa())
		return -ENODEV;

	ret = gpio_request_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
	if (ret)
		return ret;

	mutex_init(&tosa_bat_main.work_lock);
	mutex_init(&tosa_bat_jacket.work_lock);

	INIT_WORK(&bat_work, tosa_bat_work);

	main_psy_cfg.drv_data = &tosa_bat_main;
	tosa_bat_main.psy = power_supply_register(&dev->dev,
						  &tosa_bat_main_desc,
						  &main_psy_cfg);
	if (IS_ERR(tosa_bat_main.psy)) {
		ret = PTR_ERR(tosa_bat_main.psy);
		goto err_psy_reg_main;
	}

	jacket_psy_cfg.drv_data = &tosa_bat_jacket;
	tosa_bat_jacket.psy = power_supply_register(&dev->dev,
						    &tosa_bat_jacket_desc,
						    &jacket_psy_cfg);
	if (IS_ERR(tosa_bat_jacket.psy)) {
		ret = PTR_ERR(tosa_bat_jacket.psy);
		goto err_psy_reg_jacket;
	}

	bu_psy_cfg.drv_data = &tosa_bat_bu;
	tosa_bat_bu.psy = power_supply_register(&dev->dev, &tosa_bat_bu_desc,
						&bu_psy_cfg);
	if (IS_ERR(tosa_bat_bu.psy)) {
		ret = PTR_ERR(tosa_bat_bu.psy);
		goto err_psy_reg_bu;
	}

	ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG),
				tosa_bat_gpio_isr,
				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
				"main full", &tosa_bat_main);
	if (ret)
		goto err_req_main;

	ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG),
				tosa_bat_gpio_isr,
				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
				"jacket full", &tosa_bat_jacket);
	if (ret)
		goto err_req_jacket;

	ret = request_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT),
				tosa_bat_gpio_isr,
				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
				"jacket detect", &tosa_bat_jacket);
	if (!ret) {
		schedule_work(&bat_work);
		return 0;
	}

	free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket);
err_req_jacket:
	free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);
err_req_main:
	power_supply_unregister(tosa_bat_bu.psy);
err_psy_reg_bu:
	power_supply_unregister(tosa_bat_jacket.psy);
err_psy_reg_jacket:
	power_supply_unregister(tosa_bat_main.psy);
err_psy_reg_main:

	/* see comment in tosa_bat_remove */
	cancel_work_sync(&bat_work);

	gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
	return ret;
}

static int tosa_bat_remove(struct platform_device *dev)
{
	free_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), &tosa_bat_jacket);
	free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket);
	free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);

	power_supply_unregister(tosa_bat_bu.psy);
	power_supply_unregister(tosa_bat_jacket.psy);
	power_supply_unregister(tosa_bat_main.psy);

	/*
	 * Now cancel the bat_work.  We won't get any more schedules,
	 * since all sources (isr and external_power_changed) are
	 * unregistered now.
	 */
	cancel_work_sync(&bat_work);
	gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
	return 0;
}

static struct platform_driver tosa_bat_driver = {
	.driver.name	= "wm97xx-battery",
	.driver.owner	= THIS_MODULE,
	.probe		= tosa_bat_probe,
	.remove		= tosa_bat_remove,
	.suspend	= tosa_bat_suspend,
	.resume		= tosa_bat_resume,
};

module_platform_driver(tosa_bat_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Dmitry Baryshkov");
MODULE_DESCRIPTION("Tosa battery driver");
MODULE_ALIAS("platform:wm97xx-battery");
Commit	Line	Data
fece4184 DB	1	/*
	2	* Battery and Power Management code for the Sharp SL-6000x
	3	*
	4	* Copyright (c) 2005 Dirk Opfer
	5	* Copyright (c) 2008 Dmitry Baryshkov
	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	#include <linux/kernel.h>
	13	#include <linux/module.h>
	14	#include <linux/power_supply.h>
	15	#include <linux/wm97xx.h>
	16	#include <linux/delay.h>
	17	#include <linux/spinlock.h>
	18	#include <linux/interrupt.h>
	19	#include <linux/gpio.h>
	20
	21	#include <asm/mach-types.h>
a09e64fb	22	#include <mach/tosa.h>
fece4184 DB	23
	24	static DEFINE_MUTEX(bat_lock); /* protects gpio pins */
	25	static struct work_struct bat_work;
	26
	27	struct tosa_bat {
	28	int status;
297d716f	29	struct power_supply *psy;
fece4184 DB	30	int full_chrg;
	31
	32	struct mutex work_lock; /* protects data */
	33
	34	bool (is_present)(struct tosa_bat bat);
	35	int gpio_full;
	36	int gpio_charge_off;
	37
	38	int technology;
	39
	40	int gpio_bat;
	41	int adc_bat;
	42	int adc_bat_divider;
	43	int bat_max;
	44	int bat_min;
	45
	46	int gpio_temp;
	47	int adc_temp;
	48	int adc_temp_divider;
	49	};
	50
	51	static struct tosa_bat tosa_bat_main;
	52	static struct tosa_bat tosa_bat_jacket;
	53
	54	static unsigned long tosa_read_bat(struct tosa_bat *bat)
	55	{
	56	unsigned long value = 0;
	57
	58	if (bat->gpio_bat < 0 \|\| bat->adc_bat < 0)
	59	return 0;
	60
	61	mutex_lock(&bat_lock);
	62	gpio_set_value(bat->gpio_bat, 1);
	63	msleep(5);
297d716f	64	value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent),
fece4184 DB	65	bat->adc_bat);
	66	gpio_set_value(bat->gpio_bat, 0);
	67	mutex_unlock(&bat_lock);
	68
	69	value = value * 1000000 / bat->adc_bat_divider;
	70
	71	return value;
	72	}
	73
	74	static unsigned long tosa_read_temp(struct tosa_bat *bat)
	75	{
	76	unsigned long value = 0;
	77
	78	if (bat->gpio_temp < 0 \|\| bat->adc_temp < 0)
	79	return 0;
	80
	81	mutex_lock(&bat_lock);
	82	gpio_set_value(bat->gpio_temp, 1);
	83	msleep(5);
297d716f	84	value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent),
fece4184 DB	85	bat->adc_temp);
	86	gpio_set_value(bat->gpio_temp, 0);
	87	mutex_unlock(&bat_lock);
	88
	89	value = value * 10000 / bat->adc_temp_divider;
	90
	91	return value;
	92	}
	93
	94	static int tosa_bat_get_property(struct power_supply *psy,
	95	enum power_supply_property psp,
	96	union power_supply_propval *val)
	97	{
	98	int ret = 0;
297d716f	99	struct tosa_bat *bat = power_supply_get_drvdata(psy);
fece4184 DB	100
	101	if (bat->is_present && !bat->is_present(bat)
	102	&& psp != POWER_SUPPLY_PROP_PRESENT) {
	103	return -ENODEV;
	104	}
	105
	106	switch (psp) {
	107	case POWER_SUPPLY_PROP_STATUS:
	108	val->intval = bat->status;
	109	break;
	110	case POWER_SUPPLY_PROP_TECHNOLOGY:
	111	val->intval = bat->technology;
	112	break;
	113	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	114	val->intval = tosa_read_bat(bat);
	115	break;
	116	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
	117	if (bat->full_chrg == -1)
	118	val->intval = bat->bat_max;
	119	else
	120	val->intval = bat->full_chrg;
	121	break;
	122	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
	123	val->intval = bat->bat_max;
	124	break;
	125	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
	126	val->intval = bat->bat_min;
	127	break;
	128	case POWER_SUPPLY_PROP_TEMP:
	129	val->intval = tosa_read_temp(bat);
	130	break;
	131	case POWER_SUPPLY_PROP_PRESENT:
	132	val->intval = bat->is_present ? bat->is_present(bat) : 1;
	133	break;
	134	default:
	135	ret = -EINVAL;
	136	break;
	137	}
	138	return ret;
	139	}
	140
	141	static bool tosa_jacket_bat_is_present(struct tosa_bat *bat)
	142	{
	143	return gpio_get_value(TOSA_GPIO_JACKET_DETECT) == 0;
	144	}
	145
	146	static void tosa_bat_external_power_changed(struct power_supply *psy)
	147	{
	148	schedule_work(&bat_work);
	149	}
	150
	151	static irqreturn_t tosa_bat_gpio_isr(int irq, void *data)
	152	{
0e81ef58	153	pr_info("tosa_bat_gpio irq\n");
fece4184 DB	154	schedule_work(&bat_work);
	155	return IRQ_HANDLED;
	156	}
	157
	158	static void tosa_bat_update(struct tosa_bat *bat)
	159	{
	160	int old;
297d716f	161	struct power_supply *psy = bat->psy;
fece4184 DB	162
	163	mutex_lock(&bat->work_lock);
	164
	165	old = bat->status;
	166
	167	if (bat->is_present && !bat->is_present(bat)) {
297d716f	168	printk(KERN_NOTICE "%s not present\n", psy->desc->name);
fece4184 DB	169	bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
	170	bat->full_chrg = -1;
	171	} else if (power_supply_am_i_supplied(psy)) {
	172	if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) {
	173	gpio_set_value(bat->gpio_charge_off, 0);
	174	mdelay(15);
	175	}
	176
	177	if (gpio_get_value(bat->gpio_full)) {
	178	if (old == POWER_SUPPLY_STATUS_CHARGING \|\|
	179	bat->full_chrg == -1)
	180	bat->full_chrg = tosa_read_bat(bat);
	181
	182	gpio_set_value(bat->gpio_charge_off, 1);
	183	bat->status = POWER_SUPPLY_STATUS_FULL;
	184	} else {
	185	gpio_set_value(bat->gpio_charge_off, 0);
	186	bat->status = POWER_SUPPLY_STATUS_CHARGING;
	187	}
	188	} else {
	189	gpio_set_value(bat->gpio_charge_off, 1);
	190	bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
	191	}
	192
	193	if (old != bat->status)
	194	power_supply_changed(psy);
	195
	196	mutex_unlock(&bat->work_lock);
	197	}
	198
	199	static void tosa_bat_work(struct work_struct *work)
	200	{
	201	tosa_bat_update(&tosa_bat_main);
	202	tosa_bat_update(&tosa_bat_jacket);
	203	}
	204
	205
	206	static enum power_supply_property tosa_bat_main_props[] = {
	207	POWER_SUPPLY_PROP_STATUS,
	208	POWER_SUPPLY_PROP_TECHNOLOGY,
	209	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	210	POWER_SUPPLY_PROP_VOLTAGE_MAX,
	211	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	212	POWER_SUPPLY_PROP_TEMP,
	213	POWER_SUPPLY_PROP_PRESENT,
	214	};
	215
	216	static enum power_supply_property tosa_bat_bu_props[] = {
	217	POWER_SUPPLY_PROP_STATUS,
	218	POWER_SUPPLY_PROP_TECHNOLOGY,
	219	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	220	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	221	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	222	POWER_SUPPLY_PROP_PRESENT,
	223	};
	224
297d716f KK	225	static const struct power_supply_desc tosa_bat_main_desc = {
	226	.name = "main-battery",
	227	.type = POWER_SUPPLY_TYPE_BATTERY,
	228	.properties = tosa_bat_main_props,
	229	.num_properties = ARRAY_SIZE(tosa_bat_main_props),
	230	.get_property = tosa_bat_get_property,
	231	.external_power_changed = tosa_bat_external_power_changed,
	232	.use_for_apm = 1,
	233	};
	234
	235	static const struct power_supply_desc tosa_bat_jacket_desc = {
	236	.name = "jacket-battery",
	237	.type = POWER_SUPPLY_TYPE_BATTERY,
	238	.properties = tosa_bat_main_props,
	239	.num_properties = ARRAY_SIZE(tosa_bat_main_props),
	240	.get_property = tosa_bat_get_property,
	241	.external_power_changed = tosa_bat_external_power_changed,
	242	};
	243
	244	static const struct power_supply_desc tosa_bat_bu_desc = {
	245	.name = "backup-battery",
	246	.type = POWER_SUPPLY_TYPE_BATTERY,
	247	.properties = tosa_bat_bu_props,
	248	.num_properties = ARRAY_SIZE(tosa_bat_bu_props),
	249	.get_property = tosa_bat_get_property,
	250	.external_power_changed = tosa_bat_external_power_changed,
	251	};
	252
fece4184 DB	253	static struct tosa_bat tosa_bat_main = {
	254	.status = POWER_SUPPLY_STATUS_DISCHARGING,
	255	.full_chrg = -1,
297d716f	256	.psy = NULL,
fece4184 DB	257
	258	.gpio_full = TOSA_GPIO_BAT0_CRG,
	259	.gpio_charge_off = TOSA_GPIO_CHARGE_OFF,
	260
	261	.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
	262
	263	.gpio_bat = TOSA_GPIO_BAT0_V_ON,
	264	.adc_bat = WM97XX_AUX_ID3,
	265	.adc_bat_divider = 414,
	266	.bat_max = 4310000,
	267	.bat_min = 1551 * 1000000 / 414,
	268
	269	.gpio_temp = TOSA_GPIO_BAT1_TH_ON,
	270	.adc_temp = WM97XX_AUX_ID2,
	271	.adc_temp_divider = 10000,
	272	};
	273
	274	static struct tosa_bat tosa_bat_jacket = {
	275	.status = POWER_SUPPLY_STATUS_DISCHARGING,
	276	.full_chrg = -1,
297d716f	277	.psy = NULL,
fece4184 DB	278
	279	.is_present = tosa_jacket_bat_is_present,
	280	.gpio_full = TOSA_GPIO_BAT1_CRG,
	281	.gpio_charge_off = TOSA_GPIO_CHARGE_OFF_JC,
	282
	283	.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
	284
	285	.gpio_bat = TOSA_GPIO_BAT1_V_ON,
	286	.adc_bat = WM97XX_AUX_ID3,
	287	.adc_bat_divider = 414,
	288	.bat_max = 4310000,
	289	.bat_min = 1551 * 1000000 / 414,
	290
	291	.gpio_temp = TOSA_GPIO_BAT0_TH_ON,
	292	.adc_temp = WM97XX_AUX_ID2,
	293	.adc_temp_divider = 10000,
	294	};
	295
	296	static struct tosa_bat tosa_bat_bu = {
	297	.status = POWER_SUPPLY_STATUS_UNKNOWN,
	298	.full_chrg = -1,
297d716f	299	.psy = NULL,
fece4184 DB	300
	301	.gpio_full = -1,
	302	.gpio_charge_off = -1,
	303
	304	.technology = POWER_SUPPLY_TECHNOLOGY_LiMn,
	305
	306	.gpio_bat = TOSA_GPIO_BU_CHRG_ON,
	307	.adc_bat = WM97XX_AUX_ID4,
	308	.adc_bat_divider = 1266,
	309
	310	.gpio_temp = -1,
	311	.adc_temp = -1,
	312	.adc_temp_divider = -1,
	313	};
	314
019370d3 AL	315	static struct gpio tosa_bat_gpios[] = {
	316	{ TOSA_GPIO_CHARGE_OFF, GPIOF_OUT_INIT_HIGH, "main charge off" },
	317	{ TOSA_GPIO_CHARGE_OFF_JC, GPIOF_OUT_INIT_HIGH, "jacket charge off" },
	318	{ TOSA_GPIO_BAT_SW_ON, GPIOF_OUT_INIT_LOW, "battery switch" },
	319	{ TOSA_GPIO_BAT0_V_ON, GPIOF_OUT_INIT_LOW, "main battery" },
	320	{ TOSA_GPIO_BAT1_V_ON, GPIOF_OUT_INIT_LOW, "jacket battery" },
	321	{ TOSA_GPIO_BAT1_TH_ON, GPIOF_OUT_INIT_LOW, "main battery temp" },
	322	{ TOSA_GPIO_BAT0_TH_ON, GPIOF_OUT_INIT_LOW, "jacket battery temp" },
	323	{ TOSA_GPIO_BU_CHRG_ON, GPIOF_OUT_INIT_LOW, "backup battery" },
	324	{ TOSA_GPIO_BAT0_CRG, GPIOF_IN, "main battery full" },
	325	{ TOSA_GPIO_BAT1_CRG, GPIOF_IN, "jacket battery full" },
	326	{ TOSA_GPIO_BAT0_LOW, GPIOF_IN, "main battery low" },
	327	{ TOSA_GPIO_BAT1_LOW, GPIOF_IN, "jacket battery low" },
	328	{ TOSA_GPIO_JACKET_DETECT, GPIOF_IN, "jacket detect" },
fece4184 DB	329	};
	330
	331	#ifdef CONFIG_PM
	332	static int tosa_bat_suspend(struct platform_device *dev, pm_message_t state)
	333	{
	334	/* flush all pending status updates */
43829731	335	flush_work(&bat_work);
fece4184 DB	336	return 0;
	337	}
	338
	339	static int tosa_bat_resume(struct platform_device *dev)
	340	{
	341	/* things may have changed while we were away */
	342	schedule_work(&bat_work);
	343	return 0;
	344	}
	345	#else
	346	#define tosa_bat_suspend NULL
	347	#define tosa_bat_resume NULL
	348	#endif
	349
c8afa640	350	static int tosa_bat_probe(struct platform_device *dev)
fece4184 DB	351	{
fece4184 DB	352	int ret;
297d716f KK	353	struct power_supply_config main_psy_cfg = {},
	354	jacket_psy_cfg = {},
	355	bu_psy_cfg = {};
fece4184 DB	356
	357	if (!machine_is_tosa())
	358	return -ENODEV;
	359
019370d3 AL	360	ret = gpio_request_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
	361	if (ret)
	362	return ret;
fece4184 DB	363
	364	mutex_init(&tosa_bat_main.work_lock);
	365	mutex_init(&tosa_bat_jacket.work_lock);
	366
	367	INIT_WORK(&bat_work, tosa_bat_work);
	368
297d716f KK	369	main_psy_cfg.drv_data = &tosa_bat_main;
	370	tosa_bat_main.psy = power_supply_register(&dev->dev,
	371	&tosa_bat_main_desc,
	372	&main_psy_cfg);
	373	if (IS_ERR(tosa_bat_main.psy)) {
	374	ret = PTR_ERR(tosa_bat_main.psy);
fece4184	375	goto err_psy_reg_main;
297d716f KK	376	}
	377
	378	jacket_psy_cfg.drv_data = &tosa_bat_jacket;
	379	tosa_bat_jacket.psy = power_supply_register(&dev->dev,
	380	&tosa_bat_jacket_desc,
	381	&jacket_psy_cfg);
	382	if (IS_ERR(tosa_bat_jacket.psy)) {
	383	ret = PTR_ERR(tosa_bat_jacket.psy);
fece4184	384	goto err_psy_reg_jacket;
297d716f KK	385	}
	386
	387	bu_psy_cfg.drv_data = &tosa_bat_bu;
	388	tosa_bat_bu.psy = power_supply_register(&dev->dev, &tosa_bat_bu_desc,
	389	&bu_psy_cfg);
	390	if (IS_ERR(tosa_bat_bu.psy)) {
	391	ret = PTR_ERR(tosa_bat_bu.psy);
fece4184	392	goto err_psy_reg_bu;
297d716f	393	}
fece4184 DB	394
	395	ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG),
	396	tosa_bat_gpio_isr,
	397	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
	398	"main full", &tosa_bat_main);
	399	if (ret)
	400	goto err_req_main;
	401
	402	ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG),
	403	tosa_bat_gpio_isr,
	404	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
	405	"jacket full", &tosa_bat_jacket);
	406	if (ret)
	407	goto err_req_jacket;
	408
	409	ret = request_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT),
	410	tosa_bat_gpio_isr,
	411	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
	412	"jacket detect", &tosa_bat_jacket);
	413	if (!ret) {
	414	schedule_work(&bat_work);
	415	return 0;
	416	}
	417
	418	free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket);
	419	err_req_jacket:
	420	free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);
	421	err_req_main:
297d716f	422	power_supply_unregister(tosa_bat_bu.psy);
fece4184	423	err_psy_reg_bu:
297d716f	424	power_supply_unregister(tosa_bat_jacket.psy);
fece4184	425	err_psy_reg_jacket:
297d716f	426	power_supply_unregister(tosa_bat_main.psy);
fece4184 DB	427	err_psy_reg_main:
	428
	429	/* see comment in tosa_bat_remove */
bc51e7ff	430	cancel_work_sync(&bat_work);
fece4184	431
019370d3	432	gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
fece4184 DB	433	return ret;
	434	}
	435
415ec69f	436	static int tosa_bat_remove(struct platform_device *dev)
fece4184	437	{
fece4184 DB	438	free_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), &tosa_bat_jacket);
	439	free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket);
	440	free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);
	441
297d716f KK	442	power_supply_unregister(tosa_bat_bu.psy);
	443	power_supply_unregister(tosa_bat_jacket.psy);
	444	power_supply_unregister(tosa_bat_main.psy);
fece4184 DB	445
fece4184 DB	446	/*
bc51e7ff TH	447	* Now cancel the bat_work. We won't get any more schedules,
	448	* since all sources (isr and external_power_changed) are
	449	* unregistered now.
fece4184	450	*/
bc51e7ff	451	cancel_work_sync(&bat_work);
019370d3	452	gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
fece4184 DB	453	return 0;
	454	}
	455
	456	static struct platform_driver tosa_bat_driver = {
	457	.driver.name = "wm97xx-battery",
	458	.driver.owner = THIS_MODULE,
	459	.probe = tosa_bat_probe,
28ea73f4	460	.remove = tosa_bat_remove,
fece4184 DB	461	.suspend = tosa_bat_suspend,
	462	.resume = tosa_bat_resume,
	463	};
	464
300bac7f	465	module_platform_driver(tosa_bat_driver);
fece4184 DB	466
	467	MODULE_LICENSE("GPL");
	468	MODULE_AUTHOR("Dmitry Baryshkov");
	469	MODULE_DESCRIPTION("Tosa battery driver");
	470	MODULE_ALIAS("platform:wm97xx-battery");