[deliverable/linux.git] / drivers / power / apm_power.c

/*
 * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
 * Copyright © 2007 Eugeny Boger <eugenyboger@dgap.mipt.ru>
 *
 * Author: Eugeny Boger <eugenyboger@dgap.mipt.ru>
 *
 * Use consistent with the GNU GPL is permitted,
 * provided that this copyright notice is
 * preserved in its entirety in all copies and derived works.
 */

#include <linux/module.h>
#include <linux/power_supply.h>
#include <linux/apm-emulation.h>


#define PSY_PROP(psy, prop, val) psy->get_property(psy, \
			 POWER_SUPPLY_PROP_##prop, val)

#define _MPSY_PROP(prop, val) main_battery->get_property(main_battery, \
							 prop, val)

#define MPSY_PROP(prop, val) _MPSY_PROP(POWER_SUPPLY_PROP_##prop, val)

static DEFINE_MUTEX(apm_mutex);
static struct power_supply *main_battery;

enum apm_source {
	SOURCE_ENERGY,
	SOURCE_CHARGE,
	SOURCE_VOLTAGE,
};

struct find_bat_param {
	struct power_supply *main;
	struct power_supply *bat;
	struct power_supply *max_charge_bat;
	struct power_supply *max_energy_bat;
	union power_supply_propval full;
	int max_charge;
	int max_energy;
};

static int __find_main_battery(struct device *dev, void *data)
{
	struct find_bat_param *bp = (struct find_bat_param *)data;

	bp->bat = dev_get_drvdata(dev);

	if (bp->bat->use_for_apm) {
		/* nice, we explicitly asked to report this battery. */
		bp->main = bp->bat;
		return 1;
	}

	if (!PSY_PROP(bp->bat, CHARGE_FULL_DESIGN, &bp->full) ||
			!PSY_PROP(bp->bat, CHARGE_FULL, &bp->full)) {
		if (bp->full.intval > bp->max_charge) {
			bp->max_charge_bat = bp->bat;
			bp->max_charge = bp->full.intval;
		}
	} else if (!PSY_PROP(bp->bat, ENERGY_FULL_DESIGN, &bp->full) ||
			!PSY_PROP(bp->bat, ENERGY_FULL, &bp->full)) {
		if (bp->full.intval > bp->max_energy) {
			bp->max_energy_bat = bp->bat;
			bp->max_energy = bp->full.intval;
		}
	}
	return 0;
}

static void find_main_battery(void)
{
	struct find_bat_param bp;
	int error;

	memset(&bp, 0, sizeof(struct find_bat_param));
	main_battery = NULL;
	bp.main = main_battery;

	error = class_for_each_device(power_supply_class, &bp,
				      __find_main_battery);
	if (error) {
		main_battery = bp.main;
		return;
	}

	if ((bp.max_energy_bat && bp.max_charge_bat) &&
			(bp.max_energy_bat != bp.max_charge_bat)) {
		/* try guess battery with more capacity */
		if (!PSY_PROP(bp.max_charge_bat, VOLTAGE_MAX_DESIGN,
			      &bp.full)) {
			if (bp.max_energy > bp.max_charge * bp.full.intval)
				main_battery = bp.max_energy_bat;
			else
				main_battery = bp.max_charge_bat;
		} else if (!PSY_PROP(bp.max_energy_bat, VOLTAGE_MAX_DESIGN,
								  &bp.full)) {
			if (bp.max_charge > bp.max_energy / bp.full.intval)
				main_battery = bp.max_charge_bat;
			else
				main_battery = bp.max_energy_bat;
		} else {
			/* give up, choice any */
			main_battery = bp.max_energy_bat;
		}
	} else if (bp.max_charge_bat) {
		main_battery = bp.max_charge_bat;
	} else if (bp.max_energy_bat) {
		main_battery = bp.max_energy_bat;
	} else {
		/* give up, try the last if any */
		main_battery = bp.bat;
	}
}

static int do_calculate_time(int status, enum apm_source source)
{
	union power_supply_propval full;
	union power_supply_propval empty;
	union power_supply_propval cur;
	union power_supply_propval I;
	enum power_supply_property full_prop;
	enum power_supply_property full_design_prop;
	enum power_supply_property empty_prop;
	enum power_supply_property empty_design_prop;
	enum power_supply_property cur_avg_prop;
	enum power_supply_property cur_now_prop;

	if (MPSY_PROP(CURRENT_AVG, &I)) {
		/* if battery can't report average value, use momentary */
		if (MPSY_PROP(CURRENT_NOW, &I))
			return -1;
	}

	switch (source) {
	case SOURCE_CHARGE:
		full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
		full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
		empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
		empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
		cur_avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
		cur_now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
		break;
	case SOURCE_ENERGY:
		full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
		full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
		empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
		empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
		cur_avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
		cur_now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
		break;
	case SOURCE_VOLTAGE:
		full_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX;
		full_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN;
		empty_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN;
		empty_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN;
		cur_avg_prop = POWER_SUPPLY_PROP_VOLTAGE_AVG;
		cur_now_prop = POWER_SUPPLY_PROP_VOLTAGE_NOW;
		break;
	default:
		printk(KERN_ERR "Unsupported source: %d\n", source);
		return -1;
	}

	if (_MPSY_PROP(full_prop, &full)) {
		/* if battery can't report this property, use design value */
		if (_MPSY_PROP(full_design_prop, &full))
			return -1;
	}

	if (_MPSY_PROP(empty_prop, &empty)) {
		/* if battery can't report this property, use design value */
		if (_MPSY_PROP(empty_design_prop, &empty))
			empty.intval = 0;
	}

	if (_MPSY_PROP(cur_avg_prop, &cur)) {
		/* if battery can't report average value, use momentary */
		if (_MPSY_PROP(cur_now_prop, &cur))
			return -1;
	}

	if (status == POWER_SUPPLY_STATUS_CHARGING)
		return ((cur.intval - full.intval) * 60L) / I.intval;
	else
		return -((cur.intval - empty.intval) * 60L) / I.intval;
}

static int calculate_time(int status)
{
	int time;

	time = do_calculate_time(status, SOURCE_ENERGY);
	if (time != -1)
		return time;

	time = do_calculate_time(status, SOURCE_CHARGE);
	if (time != -1)
		return time;

	time = do_calculate_time(status, SOURCE_VOLTAGE);
	if (time != -1)
		return time;

	return -1;
}

static int calculate_capacity(enum apm_source source)
{
	enum power_supply_property full_prop, empty_prop;
	enum power_supply_property full_design_prop, empty_design_prop;
	enum power_supply_property now_prop, avg_prop;
	union power_supply_propval empty, full, cur;
	int ret;

	switch (source) {
	case SOURCE_CHARGE:
		full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
		empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
		full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
		empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN;
		now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
		avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
		break;
	case SOURCE_ENERGY:
		full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
		empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
		full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
		empty_design_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN;
		now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
		avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
	case SOURCE_VOLTAGE:
		full_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX;
		empty_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN;
		full_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN;
		empty_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN;
		now_prop = POWER_SUPPLY_PROP_VOLTAGE_NOW;
		avg_prop = POWER_SUPPLY_PROP_VOLTAGE_AVG;
		break;
	default:
		printk(KERN_ERR "Unsupported source: %d\n", source);
		return -1;
	}

	if (_MPSY_PROP(full_prop, &full)) {
		/* if battery can't report this property, use design value */
		if (_MPSY_PROP(full_design_prop, &full))
			return -1;
	}

	if (_MPSY_PROP(avg_prop, &cur)) {
		/* if battery can't report average value, use momentary */
		if (_MPSY_PROP(now_prop, &cur))
			return -1;
	}

	if (_MPSY_PROP(empty_prop, &empty)) {
		/* if battery can't report this property, use design value */
		if (_MPSY_PROP(empty_design_prop, &empty))
			empty.intval = 0;
	}

	if (full.intval - empty.intval)
		ret =  ((cur.intval - empty.intval) * 100L) /
		       (full.intval - empty.intval);
	else
		return -1;

	if (ret > 100)
		return 100;
	else if (ret < 0)
		return 0;

	return ret;
}

static void apm_battery_apm_get_power_status(struct apm_power_info *info)
{
	union power_supply_propval status;
	union power_supply_propval capacity, time_to_full, time_to_empty;

	mutex_lock(&apm_mutex);
	find_main_battery();
	if (!main_battery) {
		mutex_unlock(&apm_mutex);
		return;
	}

	/* status */

	if (MPSY_PROP(STATUS, &status))
		status.intval = POWER_SUPPLY_STATUS_UNKNOWN;

	/* ac line status */

	if ((status.intval == POWER_SUPPLY_STATUS_CHARGING) ||
	    (status.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) ||
	    (status.intval == POWER_SUPPLY_STATUS_FULL))
		info->ac_line_status = APM_AC_ONLINE;
	else
		info->ac_line_status = APM_AC_OFFLINE;

	/* battery life (i.e. capacity, in percents) */

	if (MPSY_PROP(CAPACITY, &capacity) == 0) {
		info->battery_life = capacity.intval;
	} else {
		/* try calculate using energy */
		info->battery_life = calculate_capacity(SOURCE_ENERGY);
		/* if failed try calculate using charge instead */
		if (info->battery_life == -1)
			info->battery_life = calculate_capacity(SOURCE_CHARGE);
		if (info->battery_life == -1)
			info->battery_life = calculate_capacity(SOURCE_VOLTAGE);
	}

	/* charging status */

	if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
		info->battery_status = APM_BATTERY_STATUS_CHARGING;
	} else {
		if (info->battery_life > 50)
			info->battery_status = APM_BATTERY_STATUS_HIGH;
		else if (info->battery_life > 5)
			info->battery_status = APM_BATTERY_STATUS_LOW;
		else
			info->battery_status = APM_BATTERY_STATUS_CRITICAL;
	}
	info->battery_flag = info->battery_status;

	/* time */

	info->units = APM_UNITS_MINS;

	if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
		if (!MPSY_PROP(TIME_TO_FULL_AVG, &time_to_full) ||
				!MPSY_PROP(TIME_TO_FULL_NOW, &time_to_full))
			info->time = time_to_full.intval / 60;
		else
			info->time = calculate_time(status.intval);
	} else {
		if (!MPSY_PROP(TIME_TO_EMPTY_AVG, &time_to_empty) ||
			      !MPSY_PROP(TIME_TO_EMPTY_NOW, &time_to_empty))
			info->time = time_to_empty.intval / 60;
		else
			info->time = calculate_time(status.intval);
	}

	mutex_unlock(&apm_mutex);
}

static int __init apm_battery_init(void)
{
	printk(KERN_INFO "APM Battery Driver\n");

	apm_get_power_status = apm_battery_apm_get_power_status;
	return 0;
}

static void __exit apm_battery_exit(void)
{
	apm_get_power_status = NULL;
}

module_init(apm_battery_init);
module_exit(apm_battery_exit);

MODULE_AUTHOR("Eugeny Boger <eugenyboger@dgap.mipt.ru>");
MODULE_DESCRIPTION("APM emulation driver for battery monitoring class");
MODULE_LICENSE("GPL");
Commit	Line	Data
3788ec93 AV	1	/*
	2	* Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
	3	* Copyright © 2007 Eugeny Boger <eugenyboger@dgap.mipt.ru>
	4	*
	5	* Author: Eugeny Boger <eugenyboger@dgap.mipt.ru>
	6	*
	7	* Use consistent with the GNU GPL is permitted,
	8	* provided that this copyright notice is
	9	* preserved in its entirety in all copies and derived works.
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/power_supply.h>
	14	#include <linux/apm-emulation.h>
	15
dffd28a1	16
3788ec93 AV	17	#define PSY_PROP(psy, prop, val) psy->get_property(psy, \
	18	POWER_SUPPLY_PROP_##prop, val)
	19
	20	#define _MPSY_PROP(prop, val) main_battery->get_property(main_battery, \
	21	prop, val)
	22
	23	#define MPSY_PROP(prop, val) _MPSY_PROP(POWER_SUPPLY_PROP_##prop, val)
	24
dffd28a1	25	static DEFINE_MUTEX(apm_mutex);
3788ec93 AV	26	static struct power_supply *main_battery;
3788ec93 AV	27
dffd28a1 DB	28	enum apm_source {
	29	SOURCE_ENERGY,
	30	SOURCE_CHARGE,
	31	SOURCE_VOLTAGE,
	32	};
	33
443cad92 DY	34	struct find_bat_param {
	35	struct power_supply *main;
	36	struct power_supply *bat;
	37	struct power_supply *max_charge_bat;
	38	struct power_supply *max_energy_bat;
3788ec93	39	union power_supply_propval full;
443cad92 DY	40	int max_charge;
	41	int max_energy;
	42	};
3788ec93	43
443cad92 DY	44	static int __find_main_battery(struct device dev, void data)
	45	{
	46	struct find_bat_param bp = (struct find_bat_param )data;
d385376f	47
443cad92	48	bp->bat = dev_get_drvdata(dev);
d385376f	49
443cad92 DY	50	if (bp->bat->use_for_apm) {
	51	/* nice, we explicitly asked to report this battery. */
	52	bp->main = bp->bat;
	53	return 1;
	54	}
d385376f	55
443cad92 DY	56	if (!PSY_PROP(bp->bat, CHARGE_FULL_DESIGN, &bp->full) \|\|
	57	!PSY_PROP(bp->bat, CHARGE_FULL, &bp->full)) {
	58	if (bp->full.intval > bp->max_charge) {
	59	bp->max_charge_bat = bp->bat;
	60	bp->max_charge = bp->full.intval;
	61	}
	62	} else if (!PSY_PROP(bp->bat, ENERGY_FULL_DESIGN, &bp->full) \|\|
	63	!PSY_PROP(bp->bat, ENERGY_FULL, &bp->full)) {
	64	if (bp->full.intval > bp->max_energy) {
	65	bp->max_energy_bat = bp->bat;
	66	bp->max_energy = bp->full.intval;
3788ec93	67	}
d385376f	68	}
443cad92 DY	69	return 0;
	70	}
	71
	72	static void find_main_battery(void)
	73	{
	74	struct find_bat_param bp;
	75	int error;
	76
	77	memset(&bp, 0, sizeof(struct find_bat_param));
	78	main_battery = NULL;
	79	bp.main = main_battery;
	80
	81	error = class_for_each_device(power_supply_class, &bp,
	82	__find_main_battery);
	83	if (error) {
	84	main_battery = bp.main;
	85	return;
	86	}
3788ec93	87
443cad92 DY	88	if ((bp.max_energy_bat && bp.max_charge_bat) &&
443cad92 DY	89	(bp.max_energy_bat != bp.max_charge_bat)) {
d385376f	90	/* try guess battery with more capacity */
443cad92 DY	91	if (!PSY_PROP(bp.max_charge_bat, VOLTAGE_MAX_DESIGN,
	92	&bp.full)) {
	93	if (bp.max_energy > bp.max_charge * bp.full.intval)
	94	main_battery = bp.max_energy_bat;
d385376f	95	else
443cad92 DY	96	main_battery = bp.max_charge_bat;
	97	} else if (!PSY_PROP(bp.max_energy_bat, VOLTAGE_MAX_DESIGN,
	98	&bp.full)) {
	99	if (bp.max_charge > bp.max_energy / bp.full.intval)
	100	main_battery = bp.max_charge_bat;
d385376f	101	else
443cad92	102	main_battery = bp.max_energy_bat;
d385376f AV	103	} else {
d385376f AV	104	/* give up, choice any */
443cad92	105	main_battery = bp.max_energy_bat;
d385376f	106	}
443cad92 DY	107	} else if (bp.max_charge_bat) {
	108	main_battery = bp.max_charge_bat;
	109	} else if (bp.max_energy_bat) {
	110	main_battery = bp.max_energy_bat;
d385376f AV	111	} else {
d385376f AV	112	/* give up, try the last if any */
443cad92	113	main_battery = bp.bat;
3788ec93	114	}
3788ec93 AV	115	}
3788ec93 AV	116
dffd28a1	117	static int do_calculate_time(int status, enum apm_source source)
3788ec93	118	{
2a721dfc AV	119	union power_supply_propval full;
	120	union power_supply_propval empty;
	121	union power_supply_propval cur;
	122	union power_supply_propval I;
	123	enum power_supply_property full_prop;
	124	enum power_supply_property full_design_prop;
	125	enum power_supply_property empty_prop;
	126	enum power_supply_property empty_design_prop;
	127	enum power_supply_property cur_avg_prop;
	128	enum power_supply_property cur_now_prop;
3788ec93	129
2a721dfc AV	130	if (MPSY_PROP(CURRENT_AVG, &I)) {
	131	/* if battery can't report average value, use momentary */
	132	if (MPSY_PROP(CURRENT_NOW, &I))
3788ec93 AV	133	return -1;
	134	}
	135
dffd28a1 DB	136	switch (source) {
dffd28a1 DB	137	case SOURCE_CHARGE:
2a721dfc AV	138	full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
	139	full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
	140	empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
	141	empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
	142	cur_avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
	143	cur_now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
dffd28a1 DB	144	break;
dffd28a1 DB	145	case SOURCE_ENERGY:
2a721dfc AV	146	full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
	147	full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
	148	empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
	149	empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
	150	cur_avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
	151	cur_now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
dffd28a1 DB	152	break;
	153	case SOURCE_VOLTAGE:
	154	full_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX;
	155	full_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN;
	156	empty_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN;
	157	empty_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN;
	158	cur_avg_prop = POWER_SUPPLY_PROP_VOLTAGE_AVG;
	159	cur_now_prop = POWER_SUPPLY_PROP_VOLTAGE_NOW;
	160	break;
	161	default:
	162	printk(KERN_ERR "Unsupported source: %d\n", source);
	163	return -1;
3788ec93 AV	164	}
3788ec93 AV	165
2a721dfc AV	166	if (_MPSY_PROP(full_prop, &full)) {
	167	/* if battery can't report this property, use design value */
	168	if (_MPSY_PROP(full_design_prop, &full))
3788ec93 AV	169	return -1;
	170	}
	171
2a721dfc AV	172	if (_MPSY_PROP(empty_prop, &empty)) {
	173	/* if battery can't report this property, use design value */
	174	if (_MPSY_PROP(empty_design_prop, &empty))
	175	empty.intval = 0;
	176	}
	177
	178	if (_MPSY_PROP(cur_avg_prop, &cur)) {
3788ec93	179	/* if battery can't report average value, use momentary */
2a721dfc	180	if (_MPSY_PROP(cur_now_prop, &cur))
3788ec93 AV	181	return -1;
	182	}
	183
	184	if (status == POWER_SUPPLY_STATUS_CHARGING)
2a721dfc	185	return ((cur.intval - full.intval) * 60L) / I.intval;
3788ec93	186	else
2a721dfc	187	return -((cur.intval - empty.intval) * 60L) / I.intval;
3788ec93 AV	188	}
3788ec93 AV	189
dffd28a1 DB	190	static int calculate_time(int status)
	191	{
	192	int time;
	193
	194	time = do_calculate_time(status, SOURCE_ENERGY);
	195	if (time != -1)
	196	return time;
	197
	198	time = do_calculate_time(status, SOURCE_CHARGE);
	199	if (time != -1)
	200	return time;
	201
	202	time = do_calculate_time(status, SOURCE_VOLTAGE);
	203	if (time != -1)
	204	return time;
	205
	206	return -1;
	207	}
	208
	209	static int calculate_capacity(enum apm_source source)
3788ec93 AV	210	{
	211	enum power_supply_property full_prop, empty_prop;
	212	enum power_supply_property full_design_prop, empty_design_prop;
	213	enum power_supply_property now_prop, avg_prop;
	214	union power_supply_propval empty, full, cur;
	215	int ret;
	216
dffd28a1 DB	217	switch (source) {
dffd28a1 DB	218	case SOURCE_CHARGE:
3788ec93 AV	219	full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
	220	empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
	221	full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
	222	empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN;
	223	now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
	224	avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
dffd28a1 DB	225	break;
dffd28a1 DB	226	case SOURCE_ENERGY:
3788ec93 AV	227	full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
	228	empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
	229	full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
	230	empty_design_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN;
	231	now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
	232	avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
dffd28a1 DB	233	case SOURCE_VOLTAGE:
	234	full_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX;
	235	empty_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN;
	236	full_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN;
	237	empty_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN;
	238	now_prop = POWER_SUPPLY_PROP_VOLTAGE_NOW;
	239	avg_prop = POWER_SUPPLY_PROP_VOLTAGE_AVG;
	240	break;
	241	default:
	242	printk(KERN_ERR "Unsupported source: %d\n", source);
	243	return -1;
3788ec93 AV	244	}
	245
	246	if (_MPSY_PROP(full_prop, &full)) {
	247	/* if battery can't report this property, use design value */
	248	if (_MPSY_PROP(full_design_prop, &full))
	249	return -1;
	250	}
	251
	252	if (_MPSY_PROP(avg_prop, &cur)) {
	253	/* if battery can't report average value, use momentary */
	254	if (_MPSY_PROP(now_prop, &cur))
	255	return -1;
	256	}
	257
	258	if (_MPSY_PROP(empty_prop, &empty)) {
	259	/* if battery can't report this property, use design value */
	260	if (_MPSY_PROP(empty_design_prop, &empty))
	261	empty.intval = 0;
	262	}
	263
	264	if (full.intval - empty.intval)
	265	ret = ((cur.intval - empty.intval) * 100L) /
	266	(full.intval - empty.intval);
	267	else
	268	return -1;
	269
	270	if (ret > 100)
	271	return 100;
	272	else if (ret < 0)
	273	return 0;
	274
	275	return ret;
	276	}
	277
	278	static void apm_battery_apm_get_power_status(struct apm_power_info *info)
	279	{
	280	union power_supply_propval status;
	281	union power_supply_propval capacity, time_to_full, time_to_empty;
	282
443cad92	283	mutex_lock(&apm_mutex);
3788ec93 AV	284	find_main_battery();
3788ec93 AV	285	if (!main_battery) {
443cad92	286	mutex_unlock(&apm_mutex);
3788ec93 AV	287	return;
	288	}
	289
	290	/* status */
	291
	292	if (MPSY_PROP(STATUS, &status))
	293	status.intval = POWER_SUPPLY_STATUS_UNKNOWN;
	294
	295	/* ac line status */
	296
	297	if ((status.intval == POWER_SUPPLY_STATUS_CHARGING) \|\|
	298	(status.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) \|\|
	299	(status.intval == POWER_SUPPLY_STATUS_FULL))
	300	info->ac_line_status = APM_AC_ONLINE;
	301	else
	302	info->ac_line_status = APM_AC_OFFLINE;
	303
	304	/* battery life (i.e. capacity, in percents) */
	305
	306	if (MPSY_PROP(CAPACITY, &capacity) == 0) {
	307	info->battery_life = capacity.intval;
	308	} else {
	309	/* try calculate using energy */
dffd28a1	310	info->battery_life = calculate_capacity(SOURCE_ENERGY);
3788ec93 AV	311	/* if failed try calculate using charge instead */
3788ec93 AV	312	if (info->battery_life == -1)
dffd28a1 DB	313	info->battery_life = calculate_capacity(SOURCE_CHARGE);
	314	if (info->battery_life == -1)
	315	info->battery_life = calculate_capacity(SOURCE_VOLTAGE);
3788ec93 AV	316	}
	317
	318	/* charging status */
	319
	320	if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
	321	info->battery_status = APM_BATTERY_STATUS_CHARGING;
	322	} else {
	323	if (info->battery_life > 50)
	324	info->battery_status = APM_BATTERY_STATUS_HIGH;
	325	else if (info->battery_life > 5)
	326	info->battery_status = APM_BATTERY_STATUS_LOW;
	327	else
	328	info->battery_status = APM_BATTERY_STATUS_CRITICAL;
	329	}
	330	info->battery_flag = info->battery_status;
	331
	332	/* time */
	333
	334	info->units = APM_UNITS_MINS;
	335
	336	if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
cd1ebcc0	337	if (!MPSY_PROP(TIME_TO_FULL_AVG, &time_to_full) \|\|
dffd28a1	338	!MPSY_PROP(TIME_TO_FULL_NOW, &time_to_full))
cd1ebcc0	339	info->time = time_to_full.intval / 60;
dffd28a1 DB	340	else
dffd28a1 DB	341	info->time = calculate_time(status.intval);
3788ec93	342	} else {
cd1ebcc0	343	if (!MPSY_PROP(TIME_TO_EMPTY_AVG, &time_to_empty) \|\|
dffd28a1	344	!MPSY_PROP(TIME_TO_EMPTY_NOW, &time_to_empty))
cd1ebcc0	345	info->time = time_to_empty.intval / 60;
dffd28a1 DB	346	else
dffd28a1 DB	347	info->time = calculate_time(status.intval);
3788ec93 AV	348	}
3788ec93 AV	349
443cad92	350	mutex_unlock(&apm_mutex);
3788ec93 AV	351	}
	352
	353	static int __init apm_battery_init(void)
	354	{
	355	printk(KERN_INFO "APM Battery Driver\n");
	356
	357	apm_get_power_status = apm_battery_apm_get_power_status;
	358	return 0;
	359	}
	360
	361	static void __exit apm_battery_exit(void)
	362	{
	363	apm_get_power_status = NULL;
3788ec93 AV	364	}
	365
	366	module_init(apm_battery_init);
	367	module_exit(apm_battery_exit);
	368
	369	MODULE_AUTHOR("Eugeny Boger <eugenyboger@dgap.mipt.ru>");
	370	MODULE_DESCRIPTION("APM emulation driver for battery monitoring class");
	371	MODULE_LICENSE("GPL");