| 1 |
62 |
marcus.erl |
/*
|
| 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 |
|
|
|
| 16 |
|
|
#define PSY_PROP(psy, prop, val) psy->get_property(psy, \
|
| 17 |
|
|
POWER_SUPPLY_PROP_##prop, val)
|
| 18 |
|
|
|
| 19 |
|
|
#define _MPSY_PROP(prop, val) main_battery->get_property(main_battery, \
|
| 20 |
|
|
prop, val)
|
| 21 |
|
|
|
| 22 |
|
|
#define MPSY_PROP(prop, val) _MPSY_PROP(POWER_SUPPLY_PROP_##prop, val)
|
| 23 |
|
|
|
| 24 |
|
|
static struct power_supply *main_battery;
|
| 25 |
|
|
|
| 26 |
|
|
static void find_main_battery(void)
|
| 27 |
|
|
{
|
| 28 |
|
|
struct device *dev;
|
| 29 |
|
|
struct power_supply *bat = NULL;
|
| 30 |
|
|
struct power_supply *max_charge_bat = NULL;
|
| 31 |
|
|
struct power_supply *max_energy_bat = NULL;
|
| 32 |
|
|
union power_supply_propval full;
|
| 33 |
|
|
int max_charge = 0;
|
| 34 |
|
|
int max_energy = 0;
|
| 35 |
|
|
|
| 36 |
|
|
main_battery = NULL;
|
| 37 |
|
|
|
| 38 |
|
|
list_for_each_entry(dev, &power_supply_class->devices, node) {
|
| 39 |
|
|
bat = dev_get_drvdata(dev);
|
| 40 |
|
|
|
| 41 |
|
|
if (bat->use_for_apm) {
|
| 42 |
|
|
/* nice, we explicitly asked to report this battery. */
|
| 43 |
|
|
main_battery = bat;
|
| 44 |
|
|
return;
|
| 45 |
|
|
}
|
| 46 |
|
|
|
| 47 |
|
|
if (!PSY_PROP(bat, CHARGE_FULL_DESIGN, &full) ||
|
| 48 |
|
|
!PSY_PROP(bat, CHARGE_FULL, &full)) {
|
| 49 |
|
|
if (full.intval > max_charge) {
|
| 50 |
|
|
max_charge_bat = bat;
|
| 51 |
|
|
max_charge = full.intval;
|
| 52 |
|
|
}
|
| 53 |
|
|
} else if (!PSY_PROP(bat, ENERGY_FULL_DESIGN, &full) ||
|
| 54 |
|
|
!PSY_PROP(bat, ENERGY_FULL, &full)) {
|
| 55 |
|
|
if (full.intval > max_energy) {
|
| 56 |
|
|
max_energy_bat = bat;
|
| 57 |
|
|
max_energy = full.intval;
|
| 58 |
|
|
}
|
| 59 |
|
|
}
|
| 60 |
|
|
}
|
| 61 |
|
|
|
| 62 |
|
|
if ((max_energy_bat && max_charge_bat) &&
|
| 63 |
|
|
(max_energy_bat != max_charge_bat)) {
|
| 64 |
|
|
/* try guess battery with more capacity */
|
| 65 |
|
|
if (!PSY_PROP(max_charge_bat, VOLTAGE_MAX_DESIGN, &full)) {
|
| 66 |
|
|
if (max_energy > max_charge * full.intval)
|
| 67 |
|
|
main_battery = max_energy_bat;
|
| 68 |
|
|
else
|
| 69 |
|
|
main_battery = max_charge_bat;
|
| 70 |
|
|
} else if (!PSY_PROP(max_energy_bat, VOLTAGE_MAX_DESIGN,
|
| 71 |
|
|
&full)) {
|
| 72 |
|
|
if (max_charge > max_energy / full.intval)
|
| 73 |
|
|
main_battery = max_charge_bat;
|
| 74 |
|
|
else
|
| 75 |
|
|
main_battery = max_energy_bat;
|
| 76 |
|
|
} else {
|
| 77 |
|
|
/* give up, choice any */
|
| 78 |
|
|
main_battery = max_energy_bat;
|
| 79 |
|
|
}
|
| 80 |
|
|
} else if (max_charge_bat) {
|
| 81 |
|
|
main_battery = max_charge_bat;
|
| 82 |
|
|
} else if (max_energy_bat) {
|
| 83 |
|
|
main_battery = max_energy_bat;
|
| 84 |
|
|
} else {
|
| 85 |
|
|
/* give up, try the last if any */
|
| 86 |
|
|
main_battery = bat;
|
| 87 |
|
|
}
|
| 88 |
|
|
}
|
| 89 |
|
|
|
| 90 |
|
|
static int calculate_time(int status, int using_charge)
|
| 91 |
|
|
{
|
| 92 |
|
|
union power_supply_propval full;
|
| 93 |
|
|
union power_supply_propval empty;
|
| 94 |
|
|
union power_supply_propval cur;
|
| 95 |
|
|
union power_supply_propval I;
|
| 96 |
|
|
enum power_supply_property full_prop;
|
| 97 |
|
|
enum power_supply_property full_design_prop;
|
| 98 |
|
|
enum power_supply_property empty_prop;
|
| 99 |
|
|
enum power_supply_property empty_design_prop;
|
| 100 |
|
|
enum power_supply_property cur_avg_prop;
|
| 101 |
|
|
enum power_supply_property cur_now_prop;
|
| 102 |
|
|
|
| 103 |
|
|
if (MPSY_PROP(CURRENT_AVG, &I)) {
|
| 104 |
|
|
/* if battery can't report average value, use momentary */
|
| 105 |
|
|
if (MPSY_PROP(CURRENT_NOW, &I))
|
| 106 |
|
|
return -1;
|
| 107 |
|
|
}
|
| 108 |
|
|
|
| 109 |
|
|
if (using_charge) {
|
| 110 |
|
|
full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
|
| 111 |
|
|
full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
|
| 112 |
|
|
empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
|
| 113 |
|
|
empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
|
| 114 |
|
|
cur_avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
|
| 115 |
|
|
cur_now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
|
| 116 |
|
|
} else {
|
| 117 |
|
|
full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
|
| 118 |
|
|
full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
|
| 119 |
|
|
empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
|
| 120 |
|
|
empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
|
| 121 |
|
|
cur_avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
|
| 122 |
|
|
cur_now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
|
| 123 |
|
|
}
|
| 124 |
|
|
|
| 125 |
|
|
if (_MPSY_PROP(full_prop, &full)) {
|
| 126 |
|
|
/* if battery can't report this property, use design value */
|
| 127 |
|
|
if (_MPSY_PROP(full_design_prop, &full))
|
| 128 |
|
|
return -1;
|
| 129 |
|
|
}
|
| 130 |
|
|
|
| 131 |
|
|
if (_MPSY_PROP(empty_prop, &empty)) {
|
| 132 |
|
|
/* if battery can't report this property, use design value */
|
| 133 |
|
|
if (_MPSY_PROP(empty_design_prop, &empty))
|
| 134 |
|
|
empty.intval = 0;
|
| 135 |
|
|
}
|
| 136 |
|
|
|
| 137 |
|
|
if (_MPSY_PROP(cur_avg_prop, &cur)) {
|
| 138 |
|
|
/* if battery can't report average value, use momentary */
|
| 139 |
|
|
if (_MPSY_PROP(cur_now_prop, &cur))
|
| 140 |
|
|
return -1;
|
| 141 |
|
|
}
|
| 142 |
|
|
|
| 143 |
|
|
if (status == POWER_SUPPLY_STATUS_CHARGING)
|
| 144 |
|
|
return ((cur.intval - full.intval) * 60L) / I.intval;
|
| 145 |
|
|
else
|
| 146 |
|
|
return -((cur.intval - empty.intval) * 60L) / I.intval;
|
| 147 |
|
|
}
|
| 148 |
|
|
|
| 149 |
|
|
static int calculate_capacity(int using_charge)
|
| 150 |
|
|
{
|
| 151 |
|
|
enum power_supply_property full_prop, empty_prop;
|
| 152 |
|
|
enum power_supply_property full_design_prop, empty_design_prop;
|
| 153 |
|
|
enum power_supply_property now_prop, avg_prop;
|
| 154 |
|
|
union power_supply_propval empty, full, cur;
|
| 155 |
|
|
int ret;
|
| 156 |
|
|
|
| 157 |
|
|
if (using_charge) {
|
| 158 |
|
|
full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
|
| 159 |
|
|
empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
|
| 160 |
|
|
full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
|
| 161 |
|
|
empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN;
|
| 162 |
|
|
now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
|
| 163 |
|
|
avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
|
| 164 |
|
|
} else {
|
| 165 |
|
|
full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
|
| 166 |
|
|
empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
|
| 167 |
|
|
full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
|
| 168 |
|
|
empty_design_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN;
|
| 169 |
|
|
now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
|
| 170 |
|
|
avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
|
| 171 |
|
|
}
|
| 172 |
|
|
|
| 173 |
|
|
if (_MPSY_PROP(full_prop, &full)) {
|
| 174 |
|
|
/* if battery can't report this property, use design value */
|
| 175 |
|
|
if (_MPSY_PROP(full_design_prop, &full))
|
| 176 |
|
|
return -1;
|
| 177 |
|
|
}
|
| 178 |
|
|
|
| 179 |
|
|
if (_MPSY_PROP(avg_prop, &cur)) {
|
| 180 |
|
|
/* if battery can't report average value, use momentary */
|
| 181 |
|
|
if (_MPSY_PROP(now_prop, &cur))
|
| 182 |
|
|
return -1;
|
| 183 |
|
|
}
|
| 184 |
|
|
|
| 185 |
|
|
if (_MPSY_PROP(empty_prop, &empty)) {
|
| 186 |
|
|
/* if battery can't report this property, use design value */
|
| 187 |
|
|
if (_MPSY_PROP(empty_design_prop, &empty))
|
| 188 |
|
|
empty.intval = 0;
|
| 189 |
|
|
}
|
| 190 |
|
|
|
| 191 |
|
|
if (full.intval - empty.intval)
|
| 192 |
|
|
ret = ((cur.intval - empty.intval) * 100L) /
|
| 193 |
|
|
(full.intval - empty.intval);
|
| 194 |
|
|
else
|
| 195 |
|
|
return -1;
|
| 196 |
|
|
|
| 197 |
|
|
if (ret > 100)
|
| 198 |
|
|
return 100;
|
| 199 |
|
|
else if (ret < 0)
|
| 200 |
|
|
return 0;
|
| 201 |
|
|
|
| 202 |
|
|
return ret;
|
| 203 |
|
|
}
|
| 204 |
|
|
|
| 205 |
|
|
static void apm_battery_apm_get_power_status(struct apm_power_info *info)
|
| 206 |
|
|
{
|
| 207 |
|
|
union power_supply_propval status;
|
| 208 |
|
|
union power_supply_propval capacity, time_to_full, time_to_empty;
|
| 209 |
|
|
|
| 210 |
|
|
down(&power_supply_class->sem);
|
| 211 |
|
|
find_main_battery();
|
| 212 |
|
|
if (!main_battery) {
|
| 213 |
|
|
up(&power_supply_class->sem);
|
| 214 |
|
|
return;
|
| 215 |
|
|
}
|
| 216 |
|
|
|
| 217 |
|
|
/* status */
|
| 218 |
|
|
|
| 219 |
|
|
if (MPSY_PROP(STATUS, &status))
|
| 220 |
|
|
status.intval = POWER_SUPPLY_STATUS_UNKNOWN;
|
| 221 |
|
|
|
| 222 |
|
|
/* ac line status */
|
| 223 |
|
|
|
| 224 |
|
|
if ((status.intval == POWER_SUPPLY_STATUS_CHARGING) ||
|
| 225 |
|
|
(status.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) ||
|
| 226 |
|
|
(status.intval == POWER_SUPPLY_STATUS_FULL))
|
| 227 |
|
|
info->ac_line_status = APM_AC_ONLINE;
|
| 228 |
|
|
else
|
| 229 |
|
|
info->ac_line_status = APM_AC_OFFLINE;
|
| 230 |
|
|
|
| 231 |
|
|
/* battery life (i.e. capacity, in percents) */
|
| 232 |
|
|
|
| 233 |
|
|
if (MPSY_PROP(CAPACITY, &capacity) == 0) {
|
| 234 |
|
|
info->battery_life = capacity.intval;
|
| 235 |
|
|
} else {
|
| 236 |
|
|
/* try calculate using energy */
|
| 237 |
|
|
info->battery_life = calculate_capacity(0);
|
| 238 |
|
|
/* if failed try calculate using charge instead */
|
| 239 |
|
|
if (info->battery_life == -1)
|
| 240 |
|
|
info->battery_life = calculate_capacity(1);
|
| 241 |
|
|
}
|
| 242 |
|
|
|
| 243 |
|
|
/* charging status */
|
| 244 |
|
|
|
| 245 |
|
|
if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
|
| 246 |
|
|
info->battery_status = APM_BATTERY_STATUS_CHARGING;
|
| 247 |
|
|
} else {
|
| 248 |
|
|
if (info->battery_life > 50)
|
| 249 |
|
|
info->battery_status = APM_BATTERY_STATUS_HIGH;
|
| 250 |
|
|
else if (info->battery_life > 5)
|
| 251 |
|
|
info->battery_status = APM_BATTERY_STATUS_LOW;
|
| 252 |
|
|
else
|
| 253 |
|
|
info->battery_status = APM_BATTERY_STATUS_CRITICAL;
|
| 254 |
|
|
}
|
| 255 |
|
|
info->battery_flag = info->battery_status;
|
| 256 |
|
|
|
| 257 |
|
|
/* time */
|
| 258 |
|
|
|
| 259 |
|
|
info->units = APM_UNITS_MINS;
|
| 260 |
|
|
|
| 261 |
|
|
if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
|
| 262 |
|
|
if (!MPSY_PROP(TIME_TO_FULL_AVG, &time_to_full) ||
|
| 263 |
|
|
!MPSY_PROP(TIME_TO_FULL_NOW, &time_to_full)) {
|
| 264 |
|
|
info->time = time_to_full.intval / 60;
|
| 265 |
|
|
} else {
|
| 266 |
|
|
info->time = calculate_time(status.intval, 0);
|
| 267 |
|
|
if (info->time == -1)
|
| 268 |
|
|
info->time = calculate_time(status.intval, 1);
|
| 269 |
|
|
}
|
| 270 |
|
|
} else {
|
| 271 |
|
|
if (!MPSY_PROP(TIME_TO_EMPTY_AVG, &time_to_empty) ||
|
| 272 |
|
|
!MPSY_PROP(TIME_TO_EMPTY_NOW, &time_to_empty)) {
|
| 273 |
|
|
info->time = time_to_empty.intval / 60;
|
| 274 |
|
|
} else {
|
| 275 |
|
|
info->time = calculate_time(status.intval, 0);
|
| 276 |
|
|
if (info->time == -1)
|
| 277 |
|
|
info->time = calculate_time(status.intval, 1);
|
| 278 |
|
|
}
|
| 279 |
|
|
}
|
| 280 |
|
|
|
| 281 |
|
|
up(&power_supply_class->sem);
|
| 282 |
|
|
}
|
| 283 |
|
|
|
| 284 |
|
|
static int __init apm_battery_init(void)
|
| 285 |
|
|
{
|
| 286 |
|
|
printk(KERN_INFO "APM Battery Driver\n");
|
| 287 |
|
|
|
| 288 |
|
|
apm_get_power_status = apm_battery_apm_get_power_status;
|
| 289 |
|
|
return 0;
|
| 290 |
|
|
}
|
| 291 |
|
|
|
| 292 |
|
|
static void __exit apm_battery_exit(void)
|
| 293 |
|
|
{
|
| 294 |
|
|
apm_get_power_status = NULL;
|
| 295 |
|
|
}
|
| 296 |
|
|
|
| 297 |
|
|
module_init(apm_battery_init);
|
| 298 |
|
|
module_exit(apm_battery_exit);
|
| 299 |
|
|
|
| 300 |
|
|
MODULE_AUTHOR("Eugeny Boger <eugenyboger@dgap.mipt.ru>");
|
| 301 |
|
|
MODULE_DESCRIPTION("APM emulation driver for battery monitoring class");
|
| 302 |
|
|
MODULE_LICENSE("GPL");
|
