[net-next-2.6.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 = container_of(psy, struct tosa_bat, 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: %d\n", gpio_get_value(irq_to_gpio(irq)));
	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->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 struct tosa_bat tosa_bat_main = {
	.status = POWER_SUPPLY_STATUS_DISCHARGING,
	.full_chrg = -1,
	.psy = {
		.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,
	},

	.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 = {
		.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,
	},

	.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 = {
		.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,
	},

	.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 {
	int gpio;
	char *name;
	bool output;
	int value;
} gpios[] = {
	{ TOSA_GPIO_CHARGE_OFF,		"main charge off",	1, 1 },
	{ TOSA_GPIO_CHARGE_OFF_JC,	"jacket charge off",	1, 1 },
	{ TOSA_GPIO_BAT_SW_ON,		"battery switch",	1, 0 },
	{ TOSA_GPIO_BAT0_V_ON,		"main battery",		1, 0 },
	{ TOSA_GPIO_BAT1_V_ON,		"jacket battery",	1, 0 },
	{ TOSA_GPIO_BAT1_TH_ON,		"main battery temp",	1, 0 },
	{ TOSA_GPIO_BAT0_TH_ON,		"jacket battery temp",	1, 0 },
	{ TOSA_GPIO_BU_CHRG_ON,		"backup battery",	1, 0 },
	{ TOSA_GPIO_BAT0_CRG,		"main battery full",	0, 0 },
	{ TOSA_GPIO_BAT1_CRG,		"jacket battery full",	0, 0 },
	{ TOSA_GPIO_BAT0_LOW,		"main battery low",	0, 0 },
	{ TOSA_GPIO_BAT1_LOW,		"jacket battery low",	0, 0 },
	{ TOSA_GPIO_JACKET_DETECT,	"jacket detect",	0, 0 },
};

#ifdef CONFIG_PM
static int tosa_bat_suspend(struct platform_device *dev, pm_message_t state)
{
	/* flush all pending status updates */
	flush_scheduled_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 __devinit tosa_bat_probe(struct platform_device *dev)
{
	int ret;
	int i;

	if (!machine_is_tosa())
		return -ENODEV;

	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
		ret = gpio_request(gpios[i].gpio, gpios[i].name);
		if (ret) {
			i--;
			goto err_gpio;
		}

		if (gpios[i].output)
			ret = gpio_direction_output(gpios[i].gpio,
					gpios[i].value);
		else
			ret = gpio_direction_input(gpios[i].gpio);

		if (ret)
			goto err_gpio;
	}

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

	INIT_WORK(&bat_work, tosa_bat_work);

	ret = power_supply_register(&dev->dev, &tosa_bat_main.psy);
	if (ret)
		goto err_psy_reg_main;
	ret = power_supply_register(&dev->dev, &tosa_bat_jacket.psy);
	if (ret)
		goto err_psy_reg_jacket;
	ret = power_supply_register(&dev->dev, &tosa_bat_bu.psy);
	if (ret)
		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 */
	flush_scheduled_work();

	i--;
err_gpio:
	for (; i >= 0; i--)
		gpio_free(gpios[i].gpio);

	return ret;
}

static int __devexit tosa_bat_remove(struct platform_device *dev)
{
	int i;

	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 flush all pending work.
	 * we won't get any more schedules, since all
	 * sources (isr and external_power_changed)
	 * are unregistered now.
	 */
	flush_scheduled_work();

	for (i = ARRAY_SIZE(gpios) - 1; i >= 0; i--)
		gpio_free(gpios[i].gpio);

	return 0;
}

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

static int __init tosa_bat_init(void)
{
	return platform_driver_register(&tosa_bat_driver);
}

static void __exit tosa_bat_exit(void)
{
	platform_driver_unregister(&tosa_bat_driver);
}

module_init(tosa_bat_init);
module_exit(tosa_bat_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Dmitry Baryshkov");
MODULE_DESCRIPTION("Tosa battery driver");
MODULE_ALIAS("platform:wm97xx-battery");
Commit	Line	Data
fece4184 DES	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 DES	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;
	29	struct power_supply psy;
	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);
06b9e650	64	value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy.dev->parent),
fece4184 DES	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);
06b9e650	84	value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy.dev->parent),
fece4184 DES	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;
	99	struct tosa_bat *bat = container_of(psy, struct tosa_bat, psy);
	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	{
153	pr_info("tosa_bat_gpio irq: %d\n", gpio_get_value(irq_to_gpio(irq)));
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;
161	struct power_supply *psy = &bat->psy;
162
163	mutex_lock(&bat->work_lock);
164
165	old = bat->status;
166
167	if (bat->is_present && !bat->is_present(bat)) {
168	printk(KERN_NOTICE "%s not present\n", psy->name);
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
225	static struct tosa_bat tosa_bat_main = {
226	.status = POWER_SUPPLY_STATUS_DISCHARGING,
227	.full_chrg = -1,
228	.psy = {
229	.name = "main-battery",
230	.type = POWER_SUPPLY_TYPE_BATTERY,
231	.properties = tosa_bat_main_props,
232	.num_properties = ARRAY_SIZE(tosa_bat_main_props),
233	.get_property = tosa_bat_get_property,
234	.external_power_changed = tosa_bat_external_power_changed,
235	.use_for_apm = 1,
236	},
237
238	.gpio_full = TOSA_GPIO_BAT0_CRG,
239	.gpio_charge_off = TOSA_GPIO_CHARGE_OFF,
240
241	.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
242
243	.gpio_bat = TOSA_GPIO_BAT0_V_ON,
244	.adc_bat = WM97XX_AUX_ID3,
245	.adc_bat_divider = 414,
246	.bat_max = 4310000,
247	.bat_min = 1551 * 1000000 / 414,
248
249	.gpio_temp = TOSA_GPIO_BAT1_TH_ON,
250	.adc_temp = WM97XX_AUX_ID2,
251	.adc_temp_divider = 10000,
252	};
253
254	static struct tosa_bat tosa_bat_jacket = {
255	.status = POWER_SUPPLY_STATUS_DISCHARGING,
256	.full_chrg = -1,
257	.psy = {
258	.name = "jacket-battery",
259	.type = POWER_SUPPLY_TYPE_BATTERY,
260	.properties = tosa_bat_main_props,
261	.num_properties = ARRAY_SIZE(tosa_bat_main_props),
262	.get_property = tosa_bat_get_property,
263	.external_power_changed = tosa_bat_external_power_changed,
264	},
265
266	.is_present = tosa_jacket_bat_is_present,
267	.gpio_full = TOSA_GPIO_BAT1_CRG,
268	.gpio_charge_off = TOSA_GPIO_CHARGE_OFF_JC,
269
270	.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
271
272	.gpio_bat = TOSA_GPIO_BAT1_V_ON,
273	.adc_bat = WM97XX_AUX_ID3,
274	.adc_bat_divider = 414,
275	.bat_max = 4310000,
276	.bat_min = 1551 * 1000000 / 414,
277
278	.gpio_temp = TOSA_GPIO_BAT0_TH_ON,
279	.adc_temp = WM97XX_AUX_ID2,
280	.adc_temp_divider = 10000,
281	};
282
283	static struct tosa_bat tosa_bat_bu = {
284	.status = POWER_SUPPLY_STATUS_UNKNOWN,
285	.full_chrg = -1,
286
287	.psy = {
288	.name = "backup-battery",
289	.type = POWER_SUPPLY_TYPE_BATTERY,
290	.properties = tosa_bat_bu_props,
291	.num_properties = ARRAY_SIZE(tosa_bat_bu_props),
292	.get_property = tosa_bat_get_property,
293	.external_power_changed = tosa_bat_external_power_changed,
294	},
295
296	.gpio_full = -1,
297	.gpio_charge_off = -1,
298
299	.technology = POWER_SUPPLY_TECHNOLOGY_LiMn,
300
301	.gpio_bat = TOSA_GPIO_BU_CHRG_ON,
302	.adc_bat = WM97XX_AUX_ID4,
303	.adc_bat_divider = 1266,
304
305	.gpio_temp = -1,
306	.adc_temp = -1,
307	.adc_temp_divider = -1,
308	};
309
310	static struct {
311	int gpio;
312	char *name;
313	bool output;
314	int value;
315	} gpios[] = {
316	{ TOSA_GPIO_CHARGE_OFF, "main charge off", 1, 1 },
317	{ TOSA_GPIO_CHARGE_OFF_JC, "jacket charge off", 1, 1 },
318	{ TOSA_GPIO_BAT_SW_ON, "battery switch", 1, 0 },
319	{ TOSA_GPIO_BAT0_V_ON, "main battery", 1, 0 },
320	{ TOSA_GPIO_BAT1_V_ON, "jacket battery", 1, 0 },
321	{ TOSA_GPIO_BAT1_TH_ON, "main battery temp", 1, 0 },
322	{ TOSA_GPIO_BAT0_TH_ON, "jacket battery temp", 1, 0 },
323	{ TOSA_GPIO_BU_CHRG_ON, "backup battery", 1, 0 },
324	{ TOSA_GPIO_BAT0_CRG, "main battery full", 0, 0 },
325	{ TOSA_GPIO_BAT1_CRG, "jacket battery full", 0, 0 },
326	{ TOSA_GPIO_BAT0_LOW, "main battery low", 0, 0 },
327	{ TOSA_GPIO_BAT1_LOW, "jacket battery low", 0, 0 },
328	{ TOSA_GPIO_JACKET_DETECT, "jacket detect", 0, 0 },
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 */
335	flush_scheduled_work();
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
350	static int __devinit tosa_bat_probe(struct platform_device *dev)
351	{
352	int ret;
353	int i;
354
355	if (!machine_is_tosa())
356	return -ENODEV;
357
358	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
359	ret = gpio_request(gpios[i].gpio, gpios[i].name);
360	if (ret) {
361	i--;
362	goto err_gpio;
363	}
364
365	if (gpios[i].output)
366	ret = gpio_direction_output(gpios[i].gpio,
367	gpios[i].value);
368	else
369	ret = gpio_direction_input(gpios[i].gpio);
370
371	if (ret)
372	goto err_gpio;
373	}
374
375	mutex_init(&tosa_bat_main.work_lock);
376	mutex_init(&tosa_bat_jacket.work_lock);
377
378	INIT_WORK(&bat_work, tosa_bat_work);
379
380	ret = power_supply_register(&dev->dev, &tosa_bat_main.psy);
381	if (ret)
382	goto err_psy_reg_main;
383	ret = power_supply_register(&dev->dev, &tosa_bat_jacket.psy);
384	if (ret)
385	goto err_psy_reg_jacket;
386	ret = power_supply_register(&dev->dev, &tosa_bat_bu.psy);
387	if (ret)
388	goto err_psy_reg_bu;
389
390	ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG),
391	tosa_bat_gpio_isr,
392	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
393	"main full", &tosa_bat_main);
394	if (ret)
395	goto err_req_main;
396
397	ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG),
398	tosa_bat_gpio_isr,
399	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
400	"jacket full", &tosa_bat_jacket);
401	if (ret)
402	goto err_req_jacket;
403
404	ret = request_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT),
405	tosa_bat_gpio_isr,
406	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
407	"jacket detect", &tosa_bat_jacket);
408	if (!ret) {
409	schedule_work(&bat_work);
410	return 0;
411	}
412
413	free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket);
414	err_req_jacket:
415	free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);
416	err_req_main:
417	power_supply_unregister(&tosa_bat_bu.psy);
418	err_psy_reg_bu:
419	power_supply_unregister(&tosa_bat_jacket.psy);
420	err_psy_reg_jacket:
421	power_supply_unregister(&tosa_bat_main.psy);
422	err_psy_reg_main:
423
424	/* see comment in tosa_bat_remove */
425	flush_scheduled_work();
426
427	i--;
428	err_gpio:
429	for (; i >= 0; i--)
430	gpio_free(gpios[i].gpio);
431
432	return ret;
433	}
434
435	static int __devexit tosa_bat_remove(struct platform_device *dev)
436	{
437	int i;
438
439	free_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), &tosa_bat_jacket);
440	free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket);
441	free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);
442
443	power_supply_unregister(&tosa_bat_bu.psy);
444	power_supply_unregister(&tosa_bat_jacket.psy);
445	power_supply_unregister(&tosa_bat_main.psy);
446
447	/*
448	* now flush all pending work.
449	* we won't get any more schedules, since all
450	* sources (isr and external_power_changed)
451	* are unregistered now.
452	*/
453	flush_scheduled_work();
454
455	for (i = ARRAY_SIZE(gpios) - 1; i >= 0; i--)
456	gpio_free(gpios[i].gpio);
457
458	return 0;
459	}
460
461	static struct platform_driver tosa_bat_driver = {
462	.driver.name = "wm97xx-battery",
463	.driver.owner = THIS_MODULE,
464	.probe = tosa_bat_probe,
465	.remove = __devexit_p(tosa_bat_remove),
466	.suspend = tosa_bat_suspend,
467	.resume = tosa_bat_resume,
468	};
469
470	static int __init tosa_bat_init(void)
471	{
472	return platform_driver_register(&tosa_bat_driver);
473	}
474
475	static void __exit tosa_bat_exit(void)
476	{
477	platform_driver_unregister(&tosa_bat_driver);
478	}
479
480	module_init(tosa_bat_init);
481	module_exit(tosa_bat_exit);
482
483	MODULE_LICENSE("GPL");
484	MODULE_AUTHOR("Dmitry Baryshkov");
485	MODULE_DESCRIPTION("Tosa battery driver");
486	MODULE_ALIAS("platform:wm97xx-battery");