[linux-2.6-block.git] / drivers / power / s3c_adc_battery.c

/*
 *	iPAQ h1930/h1940/rx1950 battery controller driver
 *	Copyright (c) Vasily Khoruzhick
 *	Based on h1940_battery.c by Arnaud Patard
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive for
 * more details.
 *
 */

#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/leds.h>
#include <linux/gpio.h>
#include <linux/err.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
#include <linux/s3c_adc_battery.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/module.h>

#include <plat/adc.h>

#define BAT_POLL_INTERVAL		10000 /* ms */
#define JITTER_DELAY			500 /* ms */

struct s3c_adc_bat {
	struct power_supply		*psy;
	struct s3c_adc_client		*client;
	struct s3c_adc_bat_pdata	*pdata;
	int				volt_value;
	int				cur_value;
	unsigned int			timestamp;
	int				level;
	int				status;
	int				cable_plugged:1;
};

static struct delayed_work bat_work;

static void s3c_adc_bat_ext_power_changed(struct power_supply *psy)
{
	schedule_delayed_work(&bat_work,
		msecs_to_jiffies(JITTER_DELAY));
}

static int gather_samples(struct s3c_adc_client *client, int num, int channel)
{
	int value, i;

	/* default to 1 if nothing is set */
	if (num < 1)
		num = 1;

	value = 0;
	for (i = 0; i < num; i++)
		value += s3c_adc_read(client, channel);
	value /= num;

	return value;
}

static enum power_supply_property s3c_adc_backup_bat_props[] = {
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_MIN,
	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
};

static int s3c_adc_backup_bat_get_property(struct power_supply *psy,
				enum power_supply_property psp,
				union power_supply_propval *val)
{
	struct s3c_adc_bat *bat = power_supply_get_drvdata(psy);

	if (!bat) {
		dev_err(&psy->dev, "%s: no battery infos ?!\n", __func__);
		return -EINVAL;
	}

	if (bat->volt_value < 0 ||
		jiffies_to_msecs(jiffies - bat->timestamp) >
			BAT_POLL_INTERVAL) {
		bat->volt_value = gather_samples(bat->client,
			bat->pdata->backup_volt_samples,
			bat->pdata->backup_volt_channel);
		bat->volt_value *= bat->pdata->backup_volt_mult;
		bat->timestamp = jiffies;
	}

	switch (psp) {
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		val->intval = bat->volt_value;
		return 0;
	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
		val->intval = bat->pdata->backup_volt_min;
		return 0;
	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
		val->intval = bat->pdata->backup_volt_max;
		return 0;
	default:
		return -EINVAL;
	}
}

static const struct power_supply_desc backup_bat_desc = {
	.name		= "backup-battery",
	.type		= POWER_SUPPLY_TYPE_BATTERY,
	.properties	= s3c_adc_backup_bat_props,
	.num_properties = ARRAY_SIZE(s3c_adc_backup_bat_props),
	.get_property	= s3c_adc_backup_bat_get_property,
	.use_for_apm	= 1,
};

static struct s3c_adc_bat backup_bat;

static enum power_supply_property s3c_adc_main_bat_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
	POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
	POWER_SUPPLY_PROP_CHARGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_CURRENT_NOW,
};

static int calc_full_volt(int volt_val, int cur_val, int impedance)
{
	return volt_val + cur_val * impedance / 1000;
}

static int charge_finished(struct s3c_adc_bat *bat)
{
	return bat->pdata->gpio_inverted ?
		!gpio_get_value(bat->pdata->gpio_charge_finished) :
		gpio_get_value(bat->pdata->gpio_charge_finished);
}

static int s3c_adc_bat_get_property(struct power_supply *psy,
				    enum power_supply_property psp,
				    union power_supply_propval *val)
{
	struct s3c_adc_bat *bat = power_supply_get_drvdata(psy);

	int new_level;
	int full_volt;
	const struct s3c_adc_bat_thresh *lut;
	unsigned int lut_size;

	if (!bat) {
		dev_err(&psy->dev, "no battery infos ?!\n");
		return -EINVAL;
	}

	lut = bat->pdata->lut_noac;
	lut_size = bat->pdata->lut_noac_cnt;

	if (bat->volt_value < 0 || bat->cur_value < 0 ||
		jiffies_to_msecs(jiffies - bat->timestamp) >
			BAT_POLL_INTERVAL) {
		bat->volt_value = gather_samples(bat->client,
			bat->pdata->volt_samples,
			bat->pdata->volt_channel) * bat->pdata->volt_mult;
		bat->cur_value = gather_samples(bat->client,
			bat->pdata->current_samples,
			bat->pdata->current_channel) * bat->pdata->current_mult;
		bat->timestamp = jiffies;
	}

	if (bat->cable_plugged &&
		((bat->pdata->gpio_charge_finished < 0) ||
		!charge_finished(bat))) {
		lut = bat->pdata->lut_acin;
		lut_size = bat->pdata->lut_acin_cnt;
	}

	new_level = 100000;
	full_volt = calc_full_volt((bat->volt_value / 1000),
		(bat->cur_value / 1000), bat->pdata->internal_impedance);

	if (full_volt < calc_full_volt(lut->volt, lut->cur,
		bat->pdata->internal_impedance)) {
		lut_size--;
		while (lut_size--) {
			int lut_volt1;
			int lut_volt2;

			lut_volt1 = calc_full_volt(lut[0].volt, lut[0].cur,
				bat->pdata->internal_impedance);
			lut_volt2 = calc_full_volt(lut[1].volt, lut[1].cur,
				bat->pdata->internal_impedance);
			if (full_volt < lut_volt1 && full_volt >= lut_volt2) {
				new_level = (lut[1].level +
					(lut[0].level - lut[1].level) *
					(full_volt - lut_volt2) /
					(lut_volt1 - lut_volt2)) * 1000;
				break;
			}
			new_level = lut[1].level * 1000;
			lut++;
		}
	}

	bat->level = new_level;

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		if (bat->pdata->gpio_charge_finished < 0)
			val->intval = bat->level == 100000 ?
				POWER_SUPPLY_STATUS_FULL : bat->status;
		else
			val->intval = bat->status;
		return 0;
	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
		val->intval = 100000;
		return 0;
	case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
		val->intval = 0;
		return 0;
	case POWER_SUPPLY_PROP_CHARGE_NOW:
		val->intval = bat->level;
		return 0;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		val->intval = bat->volt_value;
		return 0;
	case POWER_SUPPLY_PROP_CURRENT_NOW:
		val->intval = bat->cur_value;
		return 0;
	default:
		return -EINVAL;
	}
}

static const struct power_supply_desc main_bat_desc = {
	.name			= "main-battery",
	.type			= POWER_SUPPLY_TYPE_BATTERY,
	.properties		= s3c_adc_main_bat_props,
	.num_properties		= ARRAY_SIZE(s3c_adc_main_bat_props),
	.get_property		= s3c_adc_bat_get_property,
	.external_power_changed = s3c_adc_bat_ext_power_changed,
	.use_for_apm		= 1,
};

static struct s3c_adc_bat main_bat;

static void s3c_adc_bat_work(struct work_struct *work)
{
	struct s3c_adc_bat *bat = &main_bat;
	int is_charged;
	int is_plugged;
	static int was_plugged;

	is_plugged = power_supply_am_i_supplied(bat->psy);
	bat->cable_plugged = is_plugged;
	if (is_plugged != was_plugged) {
		was_plugged = is_plugged;
		if (is_plugged) {
			if (bat->pdata->enable_charger)
				bat->pdata->enable_charger();
			bat->status = POWER_SUPPLY_STATUS_CHARGING;
		} else {
			if (bat->pdata->disable_charger)
				bat->pdata->disable_charger();
			bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
		}
	} else {
		if ((bat->pdata->gpio_charge_finished >= 0) && is_plugged) {
			is_charged = charge_finished(&main_bat);
			if (is_charged) {
				if (bat->pdata->disable_charger)
					bat->pdata->disable_charger();
				bat->status = POWER_SUPPLY_STATUS_FULL;
			} else {
				if (bat->pdata->enable_charger)
					bat->pdata->enable_charger();
				bat->status = POWER_SUPPLY_STATUS_CHARGING;
			}
		}
	}

	power_supply_changed(bat->psy);
}

static irqreturn_t s3c_adc_bat_charged(int irq, void *dev_id)
{
	schedule_delayed_work(&bat_work,
		msecs_to_jiffies(JITTER_DELAY));
	return IRQ_HANDLED;
}

static int s3c_adc_bat_probe(struct platform_device *pdev)
{
	struct s3c_adc_client	*client;
	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
	int ret;

	client = s3c_adc_register(pdev, NULL, NULL, 0);
	if (IS_ERR(client)) {
		dev_err(&pdev->dev, "cannot register adc\n");
		return PTR_ERR(client);
	}

	platform_set_drvdata(pdev, client);

	main_bat.client = client;
	main_bat.pdata = pdata;
	main_bat.volt_value = -1;
	main_bat.cur_value = -1;
	main_bat.cable_plugged = 0;
	main_bat.status = POWER_SUPPLY_STATUS_DISCHARGING;

	main_bat.psy = power_supply_register(&pdev->dev, &main_bat_desc, NULL);
	if (IS_ERR(main_bat.psy)) {
		ret = PTR_ERR(main_bat.psy);
		goto err_reg_main;
	}
	if (pdata->backup_volt_mult) {
		const struct power_supply_config psy_cfg
						= { .drv_data = &backup_bat, };

		backup_bat.client = client;
		backup_bat.pdata = pdev->dev.platform_data;
		backup_bat.volt_value = -1;
		backup_bat.psy = power_supply_register(&pdev->dev,
						       &backup_bat_desc,
						       &psy_cfg);
		if (IS_ERR(backup_bat.psy)) {
			ret = PTR_ERR(backup_bat.psy);
			goto err_reg_backup;
		}
	}

	INIT_DELAYED_WORK(&bat_work, s3c_adc_bat_work);

	if (pdata->gpio_charge_finished >= 0) {
		ret = gpio_request(pdata->gpio_charge_finished, "charged");
		if (ret)
			goto err_gpio;

		ret = request_irq(gpio_to_irq(pdata->gpio_charge_finished),
				s3c_adc_bat_charged,
				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
				"battery charged", NULL);
		if (ret)
			goto err_irq;
	}

	if (pdata->init) {
		ret = pdata->init();
		if (ret)
			goto err_platform;
	}

	dev_info(&pdev->dev, "successfully loaded\n");
	device_init_wakeup(&pdev->dev, 1);

	/* Schedule timer to check current status */
	schedule_delayed_work(&bat_work,
		msecs_to_jiffies(JITTER_DELAY));

	return 0;

err_platform:
	if (pdata->gpio_charge_finished >= 0)
		free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
err_irq:
	if (pdata->gpio_charge_finished >= 0)
		gpio_free(pdata->gpio_charge_finished);
err_gpio:
	if (pdata->backup_volt_mult)
		power_supply_unregister(backup_bat.psy);
err_reg_backup:
	power_supply_unregister(main_bat.psy);
err_reg_main:
	return ret;
}

static int s3c_adc_bat_remove(struct platform_device *pdev)
{
	struct s3c_adc_client *client = platform_get_drvdata(pdev);
	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;

	power_supply_unregister(main_bat.psy);
	if (pdata->backup_volt_mult)
		power_supply_unregister(backup_bat.psy);

	s3c_adc_release(client);

	if (pdata->gpio_charge_finished >= 0) {
		free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
		gpio_free(pdata->gpio_charge_finished);
	}

	cancel_delayed_work(&bat_work);

	if (pdata->exit)
		pdata->exit();

	return 0;
}

#ifdef CONFIG_PM
static int s3c_adc_bat_suspend(struct platform_device *pdev,
	pm_message_t state)
{
	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;

	if (pdata->gpio_charge_finished >= 0) {
		if (device_may_wakeup(&pdev->dev))
			enable_irq_wake(
				gpio_to_irq(pdata->gpio_charge_finished));
		else {
			disable_irq(gpio_to_irq(pdata->gpio_charge_finished));
			main_bat.pdata->disable_charger();
		}
	}

	return 0;
}

static int s3c_adc_bat_resume(struct platform_device *pdev)
{
	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;

	if (pdata->gpio_charge_finished >= 0) {
		if (device_may_wakeup(&pdev->dev))
			disable_irq_wake(
				gpio_to_irq(pdata->gpio_charge_finished));
		else
			enable_irq(gpio_to_irq(pdata->gpio_charge_finished));
	}

	/* Schedule timer to check current status */
	schedule_delayed_work(&bat_work,
		msecs_to_jiffies(JITTER_DELAY));

	return 0;
}
#else
#define s3c_adc_bat_suspend NULL
#define s3c_adc_bat_resume NULL
#endif

static struct platform_driver s3c_adc_bat_driver = {
	.driver		= {
		.name	= "s3c-adc-battery",
	},
	.probe		= s3c_adc_bat_probe,
	.remove		= s3c_adc_bat_remove,
	.suspend	= s3c_adc_bat_suspend,
	.resume		= s3c_adc_bat_resume,
};

module_platform_driver(s3c_adc_bat_driver);

MODULE_AUTHOR("Vasily Khoruzhick <anarsoul@gmail.com>");
MODULE_DESCRIPTION("iPAQ H1930/H1940/RX1950 battery controller driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
808be4b2	1	/*
b595076a	2	* iPAQ h1930/h1940/rx1950 battery controller driver
808be4b2 VK	3	* Copyright (c) Vasily Khoruzhick
	4	* Based on h1940_battery.c by Arnaud Patard
	5	*
	6	* This file is subject to the terms and conditions of the GNU General Public
	7	* License. See the file COPYING in the main directory of this archive for
	8	* more details.
	9	*
	10	*/
	11
	12	#include <linux/interrupt.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/power_supply.h>
	15	#include <linux/leds.h>
	16	#include <linux/gpio.h>
	17	#include <linux/err.h>
	18	#include <linux/timer.h>
	19	#include <linux/jiffies.h>
	20	#include <linux/s3c_adc_battery.h>
	21	#include <linux/errno.h>
	22	#include <linux/init.h>
815efa1e	23	#include <linux/module.h>
808be4b2 VK	24
	25	#include <plat/adc.h>
	26
	27	#define BAT_POLL_INTERVAL 10000 /* ms */
	28	#define JITTER_DELAY 500 /* ms */
	29
	30	struct s3c_adc_bat {
297d716f	31	struct power_supply *psy;
808be4b2 VK	32	struct s3c_adc_client *client;
	33	struct s3c_adc_bat_pdata *pdata;
	34	int volt_value;
	35	int cur_value;
	36	unsigned int timestamp;
	37	int level;
	38	int status;
	39	int cable_plugged:1;
	40	};
	41
	42	static struct delayed_work bat_work;
	43
	44	static void s3c_adc_bat_ext_power_changed(struct power_supply *psy)
	45	{
	46	schedule_delayed_work(&bat_work,
	47	msecs_to_jiffies(JITTER_DELAY));
	48	}
	49
34aed73d HS	50	static int gather_samples(struct s3c_adc_client *client, int num, int channel)
	51	{
	52	int value, i;
	53
	54	/* default to 1 if nothing is set */
	55	if (num < 1)
	56	num = 1;
	57
	58	value = 0;
	59	for (i = 0; i < num; i++)
	60	value += s3c_adc_read(client, channel);
	61	value /= num;
	62
	63	return value;
	64	}
	65
808be4b2 VK	66	static enum power_supply_property s3c_adc_backup_bat_props[] = {
	67	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	68	POWER_SUPPLY_PROP_VOLTAGE_MIN,
	69	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	70	};
	71
	72	static int s3c_adc_backup_bat_get_property(struct power_supply *psy,
	73	enum power_supply_property psp,
	74	union power_supply_propval *val)
	75	{
297d716f	76	struct s3c_adc_bat *bat = power_supply_get_drvdata(psy);
808be4b2 VK	77
808be4b2 VK	78	if (!bat) {
297d716f	79	dev_err(&psy->dev, "%s: no battery infos ?!\n", __func__);
808be4b2 VK	80	return -EINVAL;
	81	}
	82
	83	if (bat->volt_value < 0 \|\|
	84	jiffies_to_msecs(jiffies - bat->timestamp) >
	85	BAT_POLL_INTERVAL) {
34aed73d HS	86	bat->volt_value = gather_samples(bat->client,
34aed73d HS	87	bat->pdata->backup_volt_samples,
808be4b2 VK	88	bat->pdata->backup_volt_channel);
	89	bat->volt_value *= bat->pdata->backup_volt_mult;
	90	bat->timestamp = jiffies;
	91	}
	92
	93	switch (psp) {
	94	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	95	val->intval = bat->volt_value;
	96	return 0;
	97	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
	98	val->intval = bat->pdata->backup_volt_min;
	99	return 0;
	100	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
	101	val->intval = bat->pdata->backup_volt_max;
	102	return 0;
	103	default:
	104	return -EINVAL;
	105	}
	106	}
	107
297d716f KK	108	static const struct power_supply_desc backup_bat_desc = {
	109	.name = "backup-battery",
	110	.type = POWER_SUPPLY_TYPE_BATTERY,
	111	.properties = s3c_adc_backup_bat_props,
	112	.num_properties = ARRAY_SIZE(s3c_adc_backup_bat_props),
	113	.get_property = s3c_adc_backup_bat_get_property,
	114	.use_for_apm = 1,
808be4b2 VK	115	};
808be4b2 VK	116
297d716f KK	117	static struct s3c_adc_bat backup_bat;
297d716f KK	118
808be4b2 VK	119	static enum power_supply_property s3c_adc_main_bat_props[] = {
	120	POWER_SUPPLY_PROP_STATUS,
	121	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
	122	POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
	123	POWER_SUPPLY_PROP_CHARGE_NOW,
	124	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	125	POWER_SUPPLY_PROP_CURRENT_NOW,
	126	};
	127
	128	static int calc_full_volt(int volt_val, int cur_val, int impedance)
	129	{
	130	return volt_val + cur_val * impedance / 1000;
	131	}
	132
c66ae9bb VK	133	static int charge_finished(struct s3c_adc_bat *bat)
	134	{
	135	return bat->pdata->gpio_inverted ?
	136	!gpio_get_value(bat->pdata->gpio_charge_finished) :
	137	gpio_get_value(bat->pdata->gpio_charge_finished);
	138	}
	139
808be4b2 VK	140	static int s3c_adc_bat_get_property(struct power_supply *psy,
	141	enum power_supply_property psp,
	142	union power_supply_propval *val)
	143	{
297d716f	144	struct s3c_adc_bat *bat = power_supply_get_drvdata(psy);
808be4b2 VK	145
	146	int new_level;
	147	int full_volt;
c6cc9fc9 SS	148	const struct s3c_adc_bat_thresh *lut;
c6cc9fc9 SS	149	unsigned int lut_size;
808be4b2 VK	150
808be4b2 VK	151	if (!bat) {
297d716f	152	dev_err(&psy->dev, "no battery infos ?!\n");
808be4b2 VK	153	return -EINVAL;
	154	}
	155
c6cc9fc9 SS	156	lut = bat->pdata->lut_noac;
	157	lut_size = bat->pdata->lut_noac_cnt;
	158
808be4b2 VK	159	if (bat->volt_value < 0 \|\| bat->cur_value < 0 \|\|
	160	jiffies_to_msecs(jiffies - bat->timestamp) >
	161	BAT_POLL_INTERVAL) {
34aed73d HS	162	bat->volt_value = gather_samples(bat->client,
34aed73d HS	163	bat->pdata->volt_samples,
808be4b2	164	bat->pdata->volt_channel) * bat->pdata->volt_mult;
34aed73d HS	165	bat->cur_value = gather_samples(bat->client,
34aed73d HS	166	bat->pdata->current_samples,
808be4b2 VK	167	bat->pdata->current_channel) * bat->pdata->current_mult;
	168	bat->timestamp = jiffies;
	169	}
	170
	171	if (bat->cable_plugged &&
	172	((bat->pdata->gpio_charge_finished < 0) \|\|
c66ae9bb	173	!charge_finished(bat))) {
808be4b2 VK	174	lut = bat->pdata->lut_acin;
	175	lut_size = bat->pdata->lut_acin_cnt;
	176	}
	177
	178	new_level = 100000;
	179	full_volt = calc_full_volt((bat->volt_value / 1000),
	180	(bat->cur_value / 1000), bat->pdata->internal_impedance);
	181
	182	if (full_volt < calc_full_volt(lut->volt, lut->cur,
	183	bat->pdata->internal_impedance)) {
	184	lut_size--;
	185	while (lut_size--) {
	186	int lut_volt1;
	187	int lut_volt2;
	188
	189	lut_volt1 = calc_full_volt(lut[0].volt, lut[0].cur,
	190	bat->pdata->internal_impedance);
	191	lut_volt2 = calc_full_volt(lut[1].volt, lut[1].cur,
	192	bat->pdata->internal_impedance);
	193	if (full_volt < lut_volt1 && full_volt >= lut_volt2) {
	194	new_level = (lut[1].level +
	195	(lut[0].level - lut[1].level) *
	196	(full_volt - lut_volt2) /
	197	(lut_volt1 - lut_volt2)) * 1000;
	198	break;
	199	}
	200	new_level = lut[1].level * 1000;
	201	lut++;
	202	}
	203	}
	204
	205	bat->level = new_level;
	206
	207	switch (psp) {
	208	case POWER_SUPPLY_PROP_STATUS:
	209	if (bat->pdata->gpio_charge_finished < 0)
	210	val->intval = bat->level == 100000 ?
	211	POWER_SUPPLY_STATUS_FULL : bat->status;
	212	else
	213	val->intval = bat->status;
	214	return 0;
	215	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
	216	val->intval = 100000;
	217	return 0;
	218	case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
	219	val->intval = 0;
	220	return 0;
	221	case POWER_SUPPLY_PROP_CHARGE_NOW:
	222	val->intval = bat->level;
	223	return 0;
	224	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	225	val->intval = bat->volt_value;
	226	return 0;
	227	case POWER_SUPPLY_PROP_CURRENT_NOW:
	228	val->intval = bat->cur_value;
	229	return 0;
	230	default:
	231	return -EINVAL;
	232	}
	233	}
	234
297d716f KK	235	static const struct power_supply_desc main_bat_desc = {
	236	.name = "main-battery",
	237	.type = POWER_SUPPLY_TYPE_BATTERY,
	238	.properties = s3c_adc_main_bat_props,
	239	.num_properties = ARRAY_SIZE(s3c_adc_main_bat_props),
	240	.get_property = s3c_adc_bat_get_property,
	241	.external_power_changed = s3c_adc_bat_ext_power_changed,
	242	.use_for_apm = 1,
808be4b2 VK	243	};
808be4b2 VK	244
297d716f KK	245	static struct s3c_adc_bat main_bat;
297d716f KK	246
808be4b2 VK	247	static void s3c_adc_bat_work(struct work_struct *work)
	248	{
	249	struct s3c_adc_bat *bat = &main_bat;
	250	int is_charged;
	251	int is_plugged;
	252	static int was_plugged;
	253
297d716f	254	is_plugged = power_supply_am_i_supplied(bat->psy);
808be4b2 VK	255	bat->cable_plugged = is_plugged;
	256	if (is_plugged != was_plugged) {
	257	was_plugged = is_plugged;
	258	if (is_plugged) {
	259	if (bat->pdata->enable_charger)
	260	bat->pdata->enable_charger();
	261	bat->status = POWER_SUPPLY_STATUS_CHARGING;
	262	} else {
	263	if (bat->pdata->disable_charger)
	264	bat->pdata->disable_charger();
	265	bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
	266	}
	267	} else {
	268	if ((bat->pdata->gpio_charge_finished >= 0) && is_plugged) {
c66ae9bb	269	is_charged = charge_finished(&main_bat);
808be4b2 VK	270	if (is_charged) {
	271	if (bat->pdata->disable_charger)
	272	bat->pdata->disable_charger();
	273	bat->status = POWER_SUPPLY_STATUS_FULL;
	274	} else {
	275	if (bat->pdata->enable_charger)
	276	bat->pdata->enable_charger();
	277	bat->status = POWER_SUPPLY_STATUS_CHARGING;
	278	}
	279	}
	280	}
	281
297d716f	282	power_supply_changed(bat->psy);
808be4b2 VK	283	}
	284
	285	static irqreturn_t s3c_adc_bat_charged(int irq, void *dev_id)
	286	{
	287	schedule_delayed_work(&bat_work,
	288	msecs_to_jiffies(JITTER_DELAY));
	289	return IRQ_HANDLED;
	290	}
	291
c8afa640	292	static int s3c_adc_bat_probe(struct platform_device *pdev)
808be4b2 VK	293	{
	294	struct s3c_adc_client *client;
	295	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
	296	int ret;
	297
	298	client = s3c_adc_register(pdev, NULL, NULL, 0);
	299	if (IS_ERR(client)) {
	300	dev_err(&pdev->dev, "cannot register adc\n");
	301	return PTR_ERR(client);
	302	}
	303
	304	platform_set_drvdata(pdev, client);
	305
	306	main_bat.client = client;
	307	main_bat.pdata = pdata;
	308	main_bat.volt_value = -1;
	309	main_bat.cur_value = -1;
	310	main_bat.cable_plugged = 0;
	311	main_bat.status = POWER_SUPPLY_STATUS_DISCHARGING;
	312
297d716f KK	313	main_bat.psy = power_supply_register(&pdev->dev, &main_bat_desc, NULL);
	314	if (IS_ERR(main_bat.psy)) {
	315	ret = PTR_ERR(main_bat.psy);
808be4b2	316	goto err_reg_main;
297d716f	317	}
808be4b2	318	if (pdata->backup_volt_mult) {
297d716f KK	319	const struct power_supply_config psy_cfg
	320	= { .drv_data = &backup_bat, };
	321
808be4b2 VK	322	backup_bat.client = client;
	323	backup_bat.pdata = pdev->dev.platform_data;
	324	backup_bat.volt_value = -1;
297d716f KK	325	backup_bat.psy = power_supply_register(&pdev->dev,
	326	&backup_bat_desc,
	327	&psy_cfg);
	328	if (IS_ERR(backup_bat.psy)) {
	329	ret = PTR_ERR(backup_bat.psy);
808be4b2	330	goto err_reg_backup;
297d716f	331	}
808be4b2 VK	332	}
	333
	334	INIT_DELAYED_WORK(&bat_work, s3c_adc_bat_work);
	335
	336	if (pdata->gpio_charge_finished >= 0) {
	337	ret = gpio_request(pdata->gpio_charge_finished, "charged");
	338	if (ret)
	339	goto err_gpio;
	340
	341	ret = request_irq(gpio_to_irq(pdata->gpio_charge_finished),
	342	s3c_adc_bat_charged,
	343	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
	344	"battery charged", NULL);
	345	if (ret)
	346	goto err_irq;
	347	}
	348
	349	if (pdata->init) {
	350	ret = pdata->init();
	351	if (ret)
	352	goto err_platform;
	353	}
	354
	355	dev_info(&pdev->dev, "successfully loaded\n");
	356	device_init_wakeup(&pdev->dev, 1);
	357
	358	/* Schedule timer to check current status */
	359	schedule_delayed_work(&bat_work,
	360	msecs_to_jiffies(JITTER_DELAY));
	361
	362	return 0;
	363
	364	err_platform:
	365	if (pdata->gpio_charge_finished >= 0)
	366	free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
	367	err_irq:
	368	if (pdata->gpio_charge_finished >= 0)
	369	gpio_free(pdata->gpio_charge_finished);
	370	err_gpio:
	371	if (pdata->backup_volt_mult)
297d716f	372	power_supply_unregister(backup_bat.psy);
808be4b2	373	err_reg_backup:
297d716f	374	power_supply_unregister(main_bat.psy);
808be4b2 VK	375	err_reg_main:
	376	return ret;
	377	}
	378
	379	static int s3c_adc_bat_remove(struct platform_device *pdev)
	380	{
	381	struct s3c_adc_client *client = platform_get_drvdata(pdev);
	382	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
	383
297d716f	384	power_supply_unregister(main_bat.psy);
808be4b2	385	if (pdata->backup_volt_mult)
297d716f	386	power_supply_unregister(backup_bat.psy);
808be4b2 VK	387
	388	s3c_adc_release(client);
	389
	390	if (pdata->gpio_charge_finished >= 0) {
	391	free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
	392	gpio_free(pdata->gpio_charge_finished);
	393	}
	394
	395	cancel_delayed_work(&bat_work);
	396
	397	if (pdata->exit)
	398	pdata->exit();
	399
	400	return 0;
	401	}
	402
	403	#ifdef CONFIG_PM
	404	static int s3c_adc_bat_suspend(struct platform_device *pdev,
	405	pm_message_t state)
	406	{
	407	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
	408
	409	if (pdata->gpio_charge_finished >= 0) {
	410	if (device_may_wakeup(&pdev->dev))
	411	enable_irq_wake(
	412	gpio_to_irq(pdata->gpio_charge_finished));
	413	else {
	414	disable_irq(gpio_to_irq(pdata->gpio_charge_finished));
	415	main_bat.pdata->disable_charger();
	416	}
	417	}
	418
	419	return 0;
	420	}
	421
	422	static int s3c_adc_bat_resume(struct platform_device *pdev)
	423	{
	424	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
	425
	426	if (pdata->gpio_charge_finished >= 0) {
	427	if (device_may_wakeup(&pdev->dev))
	428	disable_irq_wake(
	429	gpio_to_irq(pdata->gpio_charge_finished));
	430	else
	431	enable_irq(gpio_to_irq(pdata->gpio_charge_finished));
	432	}
	433
	434	/* Schedule timer to check current status */
	435	schedule_delayed_work(&bat_work,
	436	msecs_to_jiffies(JITTER_DELAY));
	437
	438	return 0;
	439	}
	440	#else
f8d878dd HS	441	#define s3c_adc_bat_suspend NULL
f8d878dd HS	442	#define s3c_adc_bat_resume NULL
808be4b2 VK	443	#endif
	444
	445	static struct platform_driver s3c_adc_bat_driver = {
	446	.driver = {
	447	.name = "s3c-adc-battery",
	448	},
	449	.probe = s3c_adc_bat_probe,
	450	.remove = s3c_adc_bat_remove,
	451	.suspend = s3c_adc_bat_suspend,
	452	.resume = s3c_adc_bat_resume,
	453	};
	454
300bac7f	455	module_platform_driver(s3c_adc_bat_driver);
808be4b2 VK	456
808be4b2 VK	457	MODULE_AUTHOR("Vasily Khoruzhick <anarsoul@gmail.com>");
b595076a	458	MODULE_DESCRIPTION("iPAQ H1930/H1940/RX1950 battery controller driver");
808be4b2	459	MODULE_LICENSE("GPL");