[deliverable/linux.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 <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 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 = container_of(psy, struct s3c_adc_bat, 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 = s3c_adc_read(bat->client,
			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 struct s3c_adc_bat backup_bat = {
	.psy = {
		.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 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 = container_of(psy, struct s3c_adc_bat, psy);

	int new_level;
	int full_volt;
	const struct s3c_adc_bat_thresh *lut = bat->pdata->lut_noac;
	unsigned int lut_size = bat->pdata->lut_noac_cnt;

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

	if (bat->volt_value < 0 || bat->cur_value < 0 ||
		jiffies_to_msecs(jiffies - bat->timestamp) >
			BAT_POLL_INTERVAL) {
		bat->volt_value = s3c_adc_read(bat->client,
			bat->pdata->volt_channel) * bat->pdata->volt_mult;
		bat->cur_value = s3c_adc_read(bat->client,
			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 struct s3c_adc_bat main_bat = {
	.psy = {
		.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 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 __init 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;

	ret = power_supply_register(&pdev->dev, &main_bat.psy);
	if (ret)
		goto err_reg_main;
	if (pdata->backup_volt_mult) {
		backup_bat.client = client;
		backup_bat.pdata = pdev->dev.platform_data;
		backup_bat.volt_value = -1;
		ret = power_supply_register(&pdev->dev, &backup_bat.psy);
		if (ret)
			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_battery_suspend NULL
#define s3c_adc_battery_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,
};

static int __init s3c_adc_bat_init(void)
{
	return platform_driver_register(&s3c_adc_bat_driver);
}
module_init(s3c_adc_bat_init);

static void __exit s3c_adc_bat_exit(void)
{
	platform_driver_unregister(&s3c_adc_bat_driver);
}
module_exit(s3c_adc_bat_exit);

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>
	23
	24	#include <plat/adc.h>
	25
	26	#define BAT_POLL_INTERVAL 10000 /* ms */
	27	#define JITTER_DELAY 500 /* ms */
	28
	29	struct s3c_adc_bat {
	30	struct power_supply psy;
	31	struct s3c_adc_client *client;
	32	struct s3c_adc_bat_pdata *pdata;
	33	int volt_value;
	34	int cur_value;
	35	unsigned int timestamp;
	36	int level;
	37	int status;
	38	int cable_plugged:1;
	39	};
	40
	41	static struct delayed_work bat_work;
	42
	43	static void s3c_adc_bat_ext_power_changed(struct power_supply *psy)
	44	{
	45	schedule_delayed_work(&bat_work,
	46	msecs_to_jiffies(JITTER_DELAY));
	47	}
	48
	49	static enum power_supply_property s3c_adc_backup_bat_props[] = {
	50	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	51	POWER_SUPPLY_PROP_VOLTAGE_MIN,
	52	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	53	};
	54
	55	static int s3c_adc_backup_bat_get_property(struct power_supply *psy,
	56	enum power_supply_property psp,
	57	union power_supply_propval *val)
	58	{
	59	struct s3c_adc_bat *bat = container_of(psy, struct s3c_adc_bat, psy);
	60
	61	if (!bat) {
	62	dev_err(psy->dev, "%s: no battery infos ?!\n", __func__);
	63	return -EINVAL;
	64	}
	65
	66	if (bat->volt_value < 0 \|\|
67	jiffies_to_msecs(jiffies - bat->timestamp) >
68	BAT_POLL_INTERVAL) {
69	bat->volt_value = s3c_adc_read(bat->client,
70	bat->pdata->backup_volt_channel);
71	bat->volt_value *= bat->pdata->backup_volt_mult;
72	bat->timestamp = jiffies;
73	}
74
75	switch (psp) {
76	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
77	val->intval = bat->volt_value;
78	return 0;
79	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
80	val->intval = bat->pdata->backup_volt_min;
81	return 0;
82	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
83	val->intval = bat->pdata->backup_volt_max;
84	return 0;
85	default:
86	return -EINVAL;
87	}
88	}
89
90	static struct s3c_adc_bat backup_bat = {
91	.psy = {
92	.name = "backup-battery",
93	.type = POWER_SUPPLY_TYPE_BATTERY,
94	.properties = s3c_adc_backup_bat_props,
95	.num_properties = ARRAY_SIZE(s3c_adc_backup_bat_props),
96	.get_property = s3c_adc_backup_bat_get_property,
97	.use_for_apm = 1,
98	},
99	};
100
101	static enum power_supply_property s3c_adc_main_bat_props[] = {
102	POWER_SUPPLY_PROP_STATUS,
103	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
104	POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
105	POWER_SUPPLY_PROP_CHARGE_NOW,
106	POWER_SUPPLY_PROP_VOLTAGE_NOW,
107	POWER_SUPPLY_PROP_CURRENT_NOW,
108	};
109
110	static int calc_full_volt(int volt_val, int cur_val, int impedance)
111	{
112	return volt_val + cur_val * impedance / 1000;
113	}
114
c66ae9bb VK	115	static int charge_finished(struct s3c_adc_bat *bat)
	116	{
	117	return bat->pdata->gpio_inverted ?
	118	!gpio_get_value(bat->pdata->gpio_charge_finished) :
	119	gpio_get_value(bat->pdata->gpio_charge_finished);
	120	}
	121
808be4b2 VK	122	static int s3c_adc_bat_get_property(struct power_supply *psy,
	123	enum power_supply_property psp,
	124	union power_supply_propval *val)
	125	{
	126	struct s3c_adc_bat *bat = container_of(psy, struct s3c_adc_bat, psy);
	127
	128	int new_level;
	129	int full_volt;
	130	const struct s3c_adc_bat_thresh *lut = bat->pdata->lut_noac;
	131	unsigned int lut_size = bat->pdata->lut_noac_cnt;
	132
	133	if (!bat) {
	134	dev_err(psy->dev, "no battery infos ?!\n");
	135	return -EINVAL;
	136	}
	137
	138	if (bat->volt_value < 0 \|\| bat->cur_value < 0 \|\|
	139	jiffies_to_msecs(jiffies - bat->timestamp) >
	140	BAT_POLL_INTERVAL) {
	141	bat->volt_value = s3c_adc_read(bat->client,
	142	bat->pdata->volt_channel) * bat->pdata->volt_mult;
	143	bat->cur_value = s3c_adc_read(bat->client,
	144	bat->pdata->current_channel) * bat->pdata->current_mult;
	145	bat->timestamp = jiffies;
	146	}
	147
	148	if (bat->cable_plugged &&
	149	((bat->pdata->gpio_charge_finished < 0) \|\|
c66ae9bb	150	!charge_finished(bat))) {
808be4b2 VK	151	lut = bat->pdata->lut_acin;
	152	lut_size = bat->pdata->lut_acin_cnt;
	153	}
	154
	155	new_level = 100000;
	156	full_volt = calc_full_volt((bat->volt_value / 1000),
	157	(bat->cur_value / 1000), bat->pdata->internal_impedance);
	158
	159	if (full_volt < calc_full_volt(lut->volt, lut->cur,
	160	bat->pdata->internal_impedance)) {
	161	lut_size--;
	162	while (lut_size--) {
	163	int lut_volt1;
	164	int lut_volt2;
	165
	166	lut_volt1 = calc_full_volt(lut[0].volt, lut[0].cur,
	167	bat->pdata->internal_impedance);
	168	lut_volt2 = calc_full_volt(lut[1].volt, lut[1].cur,
	169	bat->pdata->internal_impedance);
	170	if (full_volt < lut_volt1 && full_volt >= lut_volt2) {
	171	new_level = (lut[1].level +
	172	(lut[0].level - lut[1].level) *
	173	(full_volt - lut_volt2) /
	174	(lut_volt1 - lut_volt2)) * 1000;
	175	break;
	176	}
	177	new_level = lut[1].level * 1000;
	178	lut++;
	179	}
	180	}
	181
	182	bat->level = new_level;
	183
	184	switch (psp) {
	185	case POWER_SUPPLY_PROP_STATUS:
	186	if (bat->pdata->gpio_charge_finished < 0)
	187	val->intval = bat->level == 100000 ?
	188	POWER_SUPPLY_STATUS_FULL : bat->status;
	189	else
	190	val->intval = bat->status;
	191	return 0;
	192	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
	193	val->intval = 100000;
	194	return 0;
	195	case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
	196	val->intval = 0;
	197	return 0;
	198	case POWER_SUPPLY_PROP_CHARGE_NOW:
	199	val->intval = bat->level;
	200	return 0;
	201	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	202	val->intval = bat->volt_value;
	203	return 0;
	204	case POWER_SUPPLY_PROP_CURRENT_NOW:
	205	val->intval = bat->cur_value;
	206	return 0;
	207	default:
	208	return -EINVAL;
	209	}
	210	}
	211
	212	static struct s3c_adc_bat main_bat = {
	213	.psy = {
	214	.name = "main-battery",
215	.type = POWER_SUPPLY_TYPE_BATTERY,
216	.properties = s3c_adc_main_bat_props,
217	.num_properties = ARRAY_SIZE(s3c_adc_main_bat_props),
218	.get_property = s3c_adc_bat_get_property,
219	.external_power_changed = s3c_adc_bat_ext_power_changed,
220	.use_for_apm = 1,
221	},
222	};
223
224	static void s3c_adc_bat_work(struct work_struct *work)
225	{
226	struct s3c_adc_bat *bat = &main_bat;
227	int is_charged;
228	int is_plugged;
229	static int was_plugged;
230
231	is_plugged = power_supply_am_i_supplied(&bat->psy);
232	bat->cable_plugged = is_plugged;
233	if (is_plugged != was_plugged) {
234	was_plugged = is_plugged;
235	if (is_plugged) {
236	if (bat->pdata->enable_charger)
237	bat->pdata->enable_charger();
238	bat->status = POWER_SUPPLY_STATUS_CHARGING;
239	} else {
240	if (bat->pdata->disable_charger)
241	bat->pdata->disable_charger();
242	bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
243	}
244	} else {
245	if ((bat->pdata->gpio_charge_finished >= 0) && is_plugged) {
c66ae9bb	246	is_charged = charge_finished(&main_bat);
808be4b2 VK	247	if (is_charged) {
	248	if (bat->pdata->disable_charger)
	249	bat->pdata->disable_charger();
	250	bat->status = POWER_SUPPLY_STATUS_FULL;
	251	} else {
	252	if (bat->pdata->enable_charger)
	253	bat->pdata->enable_charger();
	254	bat->status = POWER_SUPPLY_STATUS_CHARGING;
	255	}
	256	}
	257	}
	258
	259	power_supply_changed(&bat->psy);
	260	}
	261
	262	static irqreturn_t s3c_adc_bat_charged(int irq, void *dev_id)
	263	{
	264	schedule_delayed_work(&bat_work,
	265	msecs_to_jiffies(JITTER_DELAY));
	266	return IRQ_HANDLED;
	267	}
	268
	269	static int __init s3c_adc_bat_probe(struct platform_device *pdev)
	270	{
	271	struct s3c_adc_client *client;
	272	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
	273	int ret;
	274
	275	client = s3c_adc_register(pdev, NULL, NULL, 0);
	276	if (IS_ERR(client)) {
	277	dev_err(&pdev->dev, "cannot register adc\n");
	278	return PTR_ERR(client);
	279	}
	280
	281	platform_set_drvdata(pdev, client);
	282
	283	main_bat.client = client;
	284	main_bat.pdata = pdata;
	285	main_bat.volt_value = -1;
	286	main_bat.cur_value = -1;
	287	main_bat.cable_plugged = 0;
	288	main_bat.status = POWER_SUPPLY_STATUS_DISCHARGING;
	289
	290	ret = power_supply_register(&pdev->dev, &main_bat.psy);
	291	if (ret)
	292	goto err_reg_main;
	293	if (pdata->backup_volt_mult) {
	294	backup_bat.client = client;
	295	backup_bat.pdata = pdev->dev.platform_data;
	296	backup_bat.volt_value = -1;
	297	ret = power_supply_register(&pdev->dev, &backup_bat.psy);
	298	if (ret)
	299	goto err_reg_backup;
	300	}
	301
	302	INIT_DELAYED_WORK(&bat_work, s3c_adc_bat_work);
	303
	304	if (pdata->gpio_charge_finished >= 0) {
	305	ret = gpio_request(pdata->gpio_charge_finished, "charged");
	306	if (ret)
	307	goto err_gpio;
	308
	309	ret = request_irq(gpio_to_irq(pdata->gpio_charge_finished),
	310	s3c_adc_bat_charged,
311	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
312	"battery charged", NULL);
313	if (ret)
314	goto err_irq;
315	}
316
317	if (pdata->init) {
318	ret = pdata->init();
319	if (ret)
320	goto err_platform;
321	}
322
323	dev_info(&pdev->dev, "successfully loaded\n");
324	device_init_wakeup(&pdev->dev, 1);
325
326	/* Schedule timer to check current status */
327	schedule_delayed_work(&bat_work,
328	msecs_to_jiffies(JITTER_DELAY));
329
330	return 0;
331
332	err_platform:
333	if (pdata->gpio_charge_finished >= 0)
334	free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
335	err_irq:
336	if (pdata->gpio_charge_finished >= 0)
337	gpio_free(pdata->gpio_charge_finished);
338	err_gpio:
339	if (pdata->backup_volt_mult)
340	power_supply_unregister(&backup_bat.psy);
341	err_reg_backup:
342	power_supply_unregister(&main_bat.psy);
343	err_reg_main:
344	return ret;
345	}
346
347	static int s3c_adc_bat_remove(struct platform_device *pdev)
348	{
349	struct s3c_adc_client *client = platform_get_drvdata(pdev);
350	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
351
352	power_supply_unregister(&main_bat.psy);
353	if (pdata->backup_volt_mult)
354	power_supply_unregister(&backup_bat.psy);
355
356	s3c_adc_release(client);
357
358	if (pdata->gpio_charge_finished >= 0) {
359	free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
360	gpio_free(pdata->gpio_charge_finished);
361	}
362
363	cancel_delayed_work(&bat_work);
364
365	if (pdata->exit)
366	pdata->exit();
367
368	return 0;
369	}
370
371	#ifdef CONFIG_PM
372	static int s3c_adc_bat_suspend(struct platform_device *pdev,
373	pm_message_t state)
374	{
375	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
376
377	if (pdata->gpio_charge_finished >= 0) {
378	if (device_may_wakeup(&pdev->dev))
379	enable_irq_wake(
380	gpio_to_irq(pdata->gpio_charge_finished));
381	else {
382	disable_irq(gpio_to_irq(pdata->gpio_charge_finished));
383	main_bat.pdata->disable_charger();
384	}
385	}
386
387	return 0;
388	}
389
390	static int s3c_adc_bat_resume(struct platform_device *pdev)
391	{
392	struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
393
394	if (pdata->gpio_charge_finished >= 0) {
395	if (device_may_wakeup(&pdev->dev))
396	disable_irq_wake(
397	gpio_to_irq(pdata->gpio_charge_finished));
398	else
399	enable_irq(gpio_to_irq(pdata->gpio_charge_finished));
400	}
401
402	/* Schedule timer to check current status */
403	schedule_delayed_work(&bat_work,
404	msecs_to_jiffies(JITTER_DELAY));
405
406	return 0;
407	}
408	#else
409	#define s3c_adc_battery_suspend NULL
410	#define s3c_adc_battery_resume NULL
411	#endif
412
413	static struct platform_driver s3c_adc_bat_driver = {
414	.driver = {
415	.name = "s3c-adc-battery",
416	},
417	.probe = s3c_adc_bat_probe,
418	.remove = s3c_adc_bat_remove,
419	.suspend = s3c_adc_bat_suspend,
420	.resume = s3c_adc_bat_resume,
421	};
422
423	static int __init s3c_adc_bat_init(void)
424	{
425	return platform_driver_register(&s3c_adc_bat_driver);
426	}
427	module_init(s3c_adc_bat_init);
428
429	static void __exit s3c_adc_bat_exit(void)
430	{
431	platform_driver_unregister(&s3c_adc_bat_driver);
432	}
433	module_exit(s3c_adc_bat_exit);
434
435	MODULE_AUTHOR("Vasily Khoruzhick <anarsoul@gmail.com>");
b595076a	436	MODULE_DESCRIPTION("iPAQ H1930/H1940/RX1950 battery controller driver");
808be4b2	437	MODULE_LICENSE("GPL");