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

/*
 * Copyright © 2007 Anton Vorontsov <[email protected]>
 * Copyright © 2007 Eugeny Boger <[email protected]>
 *
 * Author: Eugeny Boger <[email protected]>
 *
 * 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/device.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, NULL, &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;
	}

	if (!I.intval)
		return 0;

	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;
		break;
	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 <[email protected]>");
MODULE_DESCRIPTION("APM emulation driver for battery monitoring class");
MODULE_LICENSE("GPL");
Commit	Line	Data
3788ec93 AV	1	/*
	2	* Copyright © 2007 Anton Vorontsov <[email protected]>
	3	* Copyright © 2007 Eugeny Boger <[email protected]>
	4	*
	5	* Author: Eugeny Boger <[email protected]>
	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>
51990e82	13	#include <linux/device.h>
3788ec93 AV	14	#include <linux/power_supply.h>
	15	#include <linux/apm-emulation.h>
	16
dffd28a1	17
c84cad3d KB	18	#define PSY_PROP(psy, prop, val) (psy->get_property(psy, \
c84cad3d KB	19	POWER_SUPPLY_PROP_##prop, val))
3788ec93	20
c84cad3d KB	21	#define _MPSY_PROP(prop, val) (main_battery->get_property(main_battery, \
c84cad3d KB	22	prop, val))
3788ec93 AV	23
	24	#define MPSY_PROP(prop, val) _MPSY_PROP(POWER_SUPPLY_PROP_##prop, val)
	25
dffd28a1	26	static DEFINE_MUTEX(apm_mutex);
3788ec93 AV	27	static struct power_supply *main_battery;
3788ec93 AV	28
dffd28a1 DB	29	enum apm_source {
	30	SOURCE_ENERGY,
	31	SOURCE_CHARGE,
	32	SOURCE_VOLTAGE,
	33	};
	34
443cad92 DY	35	struct find_bat_param {
	36	struct power_supply *main;
	37	struct power_supply *bat;
	38	struct power_supply *max_charge_bat;
	39	struct power_supply *max_energy_bat;
3788ec93	40	union power_supply_propval full;
443cad92 DY	41	int max_charge;
	42	int max_energy;
	43	};
3788ec93	44
443cad92 DY	45	static int __find_main_battery(struct device dev, void data)
	46	{
	47	struct find_bat_param bp = (struct find_bat_param )data;
d385376f	48
443cad92	49	bp->bat = dev_get_drvdata(dev);
d385376f	50
443cad92 DY	51	if (bp->bat->use_for_apm) {
	52	/* nice, we explicitly asked to report this battery. */
	53	bp->main = bp->bat;
	54	return 1;
	55	}
d385376f	56
443cad92 DY	57	if (!PSY_PROP(bp->bat, CHARGE_FULL_DESIGN, &bp->full) \|\|
	58	!PSY_PROP(bp->bat, CHARGE_FULL, &bp->full)) {
	59	if (bp->full.intval > bp->max_charge) {
	60	bp->max_charge_bat = bp->bat;
	61	bp->max_charge = bp->full.intval;
	62	}
	63	} else if (!PSY_PROP(bp->bat, ENERGY_FULL_DESIGN, &bp->full) \|\|
	64	!PSY_PROP(bp->bat, ENERGY_FULL, &bp->full)) {
	65	if (bp->full.intval > bp->max_energy) {
	66	bp->max_energy_bat = bp->bat;
	67	bp->max_energy = bp->full.intval;
3788ec93	68	}
d385376f	69	}
443cad92 DY	70	return 0;
	71	}
	72
	73	static void find_main_battery(void)
	74	{
	75	struct find_bat_param bp;
	76	int error;
	77
	78	memset(&bp, 0, sizeof(struct find_bat_param));
	79	main_battery = NULL;
	80	bp.main = main_battery;
	81
93562b53	82	error = class_for_each_device(power_supply_class, NULL, &bp,
443cad92 DY	83	__find_main_battery);
	84	if (error) {
	85	main_battery = bp.main;
	86	return;
	87	}
3788ec93	88
443cad92 DY	89	if ((bp.max_energy_bat && bp.max_charge_bat) &&
443cad92 DY	90	(bp.max_energy_bat != bp.max_charge_bat)) {
d385376f	91	/* try guess battery with more capacity */
443cad92 DY	92	if (!PSY_PROP(bp.max_charge_bat, VOLTAGE_MAX_DESIGN,
	93	&bp.full)) {
	94	if (bp.max_energy > bp.max_charge * bp.full.intval)
	95	main_battery = bp.max_energy_bat;
d385376f	96	else
443cad92 DY	97	main_battery = bp.max_charge_bat;
	98	} else if (!PSY_PROP(bp.max_energy_bat, VOLTAGE_MAX_DESIGN,
	99	&bp.full)) {
	100	if (bp.max_charge > bp.max_energy / bp.full.intval)
	101	main_battery = bp.max_charge_bat;
d385376f	102	else
443cad92	103	main_battery = bp.max_energy_bat;
d385376f AV	104	} else {
d385376f AV	105	/* give up, choice any */
443cad92	106	main_battery = bp.max_energy_bat;
d385376f	107	}
443cad92 DY	108	} else if (bp.max_charge_bat) {
	109	main_battery = bp.max_charge_bat;
	110	} else if (bp.max_energy_bat) {
	111	main_battery = bp.max_energy_bat;
d385376f AV	112	} else {
d385376f AV	113	/* give up, try the last if any */
443cad92	114	main_battery = bp.bat;
3788ec93	115	}
3788ec93 AV	116	}
3788ec93 AV	117
dffd28a1	118	static int do_calculate_time(int status, enum apm_source source)
3788ec93	119	{
2a721dfc AV	120	union power_supply_propval full;
	121	union power_supply_propval empty;
	122	union power_supply_propval cur;
	123	union power_supply_propval I;
	124	enum power_supply_property full_prop;
	125	enum power_supply_property full_design_prop;
	126	enum power_supply_property empty_prop;
	127	enum power_supply_property empty_design_prop;
	128	enum power_supply_property cur_avg_prop;
	129	enum power_supply_property cur_now_prop;
3788ec93	130
2a721dfc AV	131	if (MPSY_PROP(CURRENT_AVG, &I)) {
	132	/* if battery can't report average value, use momentary */
	133	if (MPSY_PROP(CURRENT_NOW, &I))
3788ec93 AV	134	return -1;
	135	}
	136
e91926e9 AV	137	if (!I.intval)
	138	return 0;
	139
dffd28a1 DB	140	switch (source) {
dffd28a1 DB	141	case SOURCE_CHARGE:
2a721dfc AV	142	full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
	143	full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
	144	empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
	145	empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
	146	cur_avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
	147	cur_now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
dffd28a1 DB	148	break;
dffd28a1 DB	149	case SOURCE_ENERGY:
2a721dfc AV	150	full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
	151	full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
	152	empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
	153	empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
	154	cur_avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
	155	cur_now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
dffd28a1 DB	156	break;
	157	case SOURCE_VOLTAGE:
	158	full_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX;
	159	full_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN;
	160	empty_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN;
	161	empty_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN;
	162	cur_avg_prop = POWER_SUPPLY_PROP_VOLTAGE_AVG;
	163	cur_now_prop = POWER_SUPPLY_PROP_VOLTAGE_NOW;
	164	break;
	165	default:
	166	printk(KERN_ERR "Unsupported source: %d\n", source);
	167	return -1;
3788ec93 AV	168	}
3788ec93 AV	169
2a721dfc AV	170	if (_MPSY_PROP(full_prop, &full)) {
	171	/* if battery can't report this property, use design value */
	172	if (_MPSY_PROP(full_design_prop, &full))
3788ec93 AV	173	return -1;
	174	}
	175
2a721dfc AV	176	if (_MPSY_PROP(empty_prop, &empty)) {
	177	/* if battery can't report this property, use design value */
	178	if (_MPSY_PROP(empty_design_prop, &empty))
	179	empty.intval = 0;
	180	}
	181
	182	if (_MPSY_PROP(cur_avg_prop, &cur)) {
3788ec93	183	/* if battery can't report average value, use momentary */
2a721dfc	184	if (_MPSY_PROP(cur_now_prop, &cur))
3788ec93 AV	185	return -1;
	186	}
	187
	188	if (status == POWER_SUPPLY_STATUS_CHARGING)
2a721dfc	189	return ((cur.intval - full.intval) * 60L) / I.intval;
3788ec93	190	else
2a721dfc	191	return -((cur.intval - empty.intval) * 60L) / I.intval;
3788ec93 AV	192	}
3788ec93 AV	193
dffd28a1 DB	194	static int calculate_time(int status)
	195	{
	196	int time;
	197
	198	time = do_calculate_time(status, SOURCE_ENERGY);
	199	if (time != -1)
	200	return time;
	201
	202	time = do_calculate_time(status, SOURCE_CHARGE);
	203	if (time != -1)
	204	return time;
	205
	206	time = do_calculate_time(status, SOURCE_VOLTAGE);
	207	if (time != -1)
	208	return time;
	209
	210	return -1;
	211	}
	212
	213	static int calculate_capacity(enum apm_source source)
3788ec93 AV	214	{
	215	enum power_supply_property full_prop, empty_prop;
	216	enum power_supply_property full_design_prop, empty_design_prop;
	217	enum power_supply_property now_prop, avg_prop;
	218	union power_supply_propval empty, full, cur;
	219	int ret;
	220
dffd28a1 DB	221	switch (source) {
dffd28a1 DB	222	case SOURCE_CHARGE:
3788ec93 AV	223	full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
	224	empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
	225	full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
	226	empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN;
	227	now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
	228	avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
dffd28a1 DB	229	break;
dffd28a1 DB	230	case SOURCE_ENERGY:
3788ec93 AV	231	full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
	232	empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
	233	full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
	234	empty_design_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN;
	235	now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
	236	avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
1d220334	237	break;
dffd28a1 DB	238	case SOURCE_VOLTAGE:
	239	full_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX;
	240	empty_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN;
	241	full_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN;
	242	empty_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN;
	243	now_prop = POWER_SUPPLY_PROP_VOLTAGE_NOW;
	244	avg_prop = POWER_SUPPLY_PROP_VOLTAGE_AVG;
	245	break;
	246	default:
	247	printk(KERN_ERR "Unsupported source: %d\n", source);
	248	return -1;
3788ec93 AV	249	}
	250
	251	if (_MPSY_PROP(full_prop, &full)) {
	252	/* if battery can't report this property, use design value */
	253	if (_MPSY_PROP(full_design_prop, &full))
	254	return -1;
	255	}
	256
	257	if (_MPSY_PROP(avg_prop, &cur)) {
	258	/* if battery can't report average value, use momentary */
	259	if (_MPSY_PROP(now_prop, &cur))
	260	return -1;
	261	}
	262
	263	if (_MPSY_PROP(empty_prop, &empty)) {
	264	/* if battery can't report this property, use design value */
	265	if (_MPSY_PROP(empty_design_prop, &empty))
	266	empty.intval = 0;
	267	}
	268
	269	if (full.intval - empty.intval)
	270	ret = ((cur.intval - empty.intval) * 100L) /
	271	(full.intval - empty.intval);
	272	else
	273	return -1;
	274
	275	if (ret > 100)
	276	return 100;
	277	else if (ret < 0)
	278	return 0;
	279
	280	return ret;
	281	}
	282
	283	static void apm_battery_apm_get_power_status(struct apm_power_info *info)
	284	{
	285	union power_supply_propval status;
	286	union power_supply_propval capacity, time_to_full, time_to_empty;
	287
443cad92	288	mutex_lock(&apm_mutex);
3788ec93 AV	289	find_main_battery();
3788ec93 AV	290	if (!main_battery) {
443cad92	291	mutex_unlock(&apm_mutex);
3788ec93 AV	292	return;
	293	}
	294
	295	/* status */
	296
	297	if (MPSY_PROP(STATUS, &status))
	298	status.intval = POWER_SUPPLY_STATUS_UNKNOWN;
	299
	300	/* ac line status */
	301
	302	if ((status.intval == POWER_SUPPLY_STATUS_CHARGING) \|\|
	303	(status.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) \|\|
	304	(status.intval == POWER_SUPPLY_STATUS_FULL))
	305	info->ac_line_status = APM_AC_ONLINE;
	306	else
	307	info->ac_line_status = APM_AC_OFFLINE;
	308
	309	/* battery life (i.e. capacity, in percents) */
	310
	311	if (MPSY_PROP(CAPACITY, &capacity) == 0) {
	312	info->battery_life = capacity.intval;
	313	} else {
	314	/* try calculate using energy */
dffd28a1	315	info->battery_life = calculate_capacity(SOURCE_ENERGY);
3788ec93 AV	316	/* if failed try calculate using charge instead */
3788ec93 AV	317	if (info->battery_life == -1)
dffd28a1 DB	318	info->battery_life = calculate_capacity(SOURCE_CHARGE);
	319	if (info->battery_life == -1)
	320	info->battery_life = calculate_capacity(SOURCE_VOLTAGE);
3788ec93 AV	321	}
	322
	323	/* charging status */
	324
	325	if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
	326	info->battery_status = APM_BATTERY_STATUS_CHARGING;
	327	} else {
	328	if (info->battery_life > 50)
	329	info->battery_status = APM_BATTERY_STATUS_HIGH;
	330	else if (info->battery_life > 5)
	331	info->battery_status = APM_BATTERY_STATUS_LOW;
	332	else
	333	info->battery_status = APM_BATTERY_STATUS_CRITICAL;
	334	}
	335	info->battery_flag = info->battery_status;
	336
	337	/* time */
	338
	339	info->units = APM_UNITS_MINS;
	340
	341	if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
cd1ebcc0	342	if (!MPSY_PROP(TIME_TO_FULL_AVG, &time_to_full) \|\|
dffd28a1	343	!MPSY_PROP(TIME_TO_FULL_NOW, &time_to_full))
cd1ebcc0	344	info->time = time_to_full.intval / 60;
dffd28a1 DB	345	else
dffd28a1 DB	346	info->time = calculate_time(status.intval);
3788ec93	347	} else {
cd1ebcc0	348	if (!MPSY_PROP(TIME_TO_EMPTY_AVG, &time_to_empty) \|\|
dffd28a1	349	!MPSY_PROP(TIME_TO_EMPTY_NOW, &time_to_empty))
cd1ebcc0	350	info->time = time_to_empty.intval / 60;
dffd28a1 DB	351	else
dffd28a1 DB	352	info->time = calculate_time(status.intval);
3788ec93 AV	353	}
3788ec93 AV	354
443cad92	355	mutex_unlock(&apm_mutex);
3788ec93 AV	356	}
	357
	358	static int __init apm_battery_init(void)
	359	{
	360	printk(KERN_INFO "APM Battery Driver\n");
	361
	362	apm_get_power_status = apm_battery_apm_get_power_status;
	363	return 0;
	364	}
	365
	366	static void __exit apm_battery_exit(void)
	367	{
	368	apm_get_power_status = NULL;
3788ec93 AV	369	}
	370
	371	module_init(apm_battery_init);
	372	module_exit(apm_battery_exit);
	373
	374	MODULE_AUTHOR("Eugeny Boger <[email protected]>");
	375	MODULE_DESCRIPTION("APM emulation driver for battery monitoring class");
	376	MODULE_LICENSE("GPL");