| 1 | /* |
| 2 | * battery.c - ACPI Battery Driver (Revision: 2.0) |
| 3 | * |
| 4 | * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> |
| 5 | * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> |
| 6 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 7 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 8 | * |
| 9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or (at |
| 14 | * your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, but |
| 17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 19 | * General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License along |
| 22 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 23 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 24 | * |
| 25 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 26 | */ |
| 27 | |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/types.h> |
| 32 | #include <linux/jiffies.h> |
| 33 | #include <linux/async.h> |
| 34 | #include <linux/dmi.h> |
| 35 | #include <linux/slab.h> |
| 36 | |
| 37 | #ifdef CONFIG_ACPI_PROCFS_POWER |
| 38 | #include <linux/proc_fs.h> |
| 39 | #include <linux/seq_file.h> |
| 40 | #include <asm/uaccess.h> |
| 41 | #endif |
| 42 | |
| 43 | #include <acpi/acpi_bus.h> |
| 44 | #include <acpi/acpi_drivers.h> |
| 45 | #include <linux/power_supply.h> |
| 46 | |
| 47 | #define PREFIX "ACPI: " |
| 48 | |
| 49 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
| 50 | |
| 51 | #define ACPI_BATTERY_CLASS "battery" |
| 52 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
| 53 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
| 54 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 |
| 55 | #define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82 |
| 56 | |
| 57 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
| 58 | |
| 59 | ACPI_MODULE_NAME("battery"); |
| 60 | |
| 61 | MODULE_AUTHOR("Paul Diefenbaugh"); |
| 62 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
| 63 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
| 64 | MODULE_LICENSE("GPL"); |
| 65 | |
| 66 | static unsigned int cache_time = 1000; |
| 67 | module_param(cache_time, uint, 0644); |
| 68 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); |
| 69 | |
| 70 | #ifdef CONFIG_ACPI_PROCFS_POWER |
| 71 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
| 72 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); |
| 73 | |
| 74 | enum acpi_battery_files { |
| 75 | info_tag = 0, |
| 76 | state_tag, |
| 77 | alarm_tag, |
| 78 | ACPI_BATTERY_NUMFILES, |
| 79 | }; |
| 80 | |
| 81 | #endif |
| 82 | |
| 83 | static const struct acpi_device_id battery_device_ids[] = { |
| 84 | {"PNP0C0A", 0}, |
| 85 | {"", 0}, |
| 86 | }; |
| 87 | |
| 88 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
| 89 | |
| 90 | enum { |
| 91 | ACPI_BATTERY_ALARM_PRESENT, |
| 92 | ACPI_BATTERY_XINFO_PRESENT, |
| 93 | /* For buggy DSDTs that report negative 16-bit values for either |
| 94 | * charging or discharging current and/or report 0 as 65536 |
| 95 | * due to bad math. |
| 96 | */ |
| 97 | ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, |
| 98 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
| 99 | }; |
| 100 | |
| 101 | struct acpi_battery { |
| 102 | struct mutex lock; |
| 103 | struct power_supply bat; |
| 104 | struct acpi_device *device; |
| 105 | unsigned long update_time; |
| 106 | int rate_now; |
| 107 | int capacity_now; |
| 108 | int voltage_now; |
| 109 | int design_capacity; |
| 110 | int full_charge_capacity; |
| 111 | int technology; |
| 112 | int design_voltage; |
| 113 | int design_capacity_warning; |
| 114 | int design_capacity_low; |
| 115 | int cycle_count; |
| 116 | int measurement_accuracy; |
| 117 | int max_sampling_time; |
| 118 | int min_sampling_time; |
| 119 | int max_averaging_interval; |
| 120 | int min_averaging_interval; |
| 121 | int capacity_granularity_1; |
| 122 | int capacity_granularity_2; |
| 123 | int alarm; |
| 124 | char model_number[32]; |
| 125 | char serial_number[32]; |
| 126 | char type[32]; |
| 127 | char oem_info[32]; |
| 128 | int state; |
| 129 | int power_unit; |
| 130 | unsigned long flags; |
| 131 | }; |
| 132 | |
| 133 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat); |
| 134 | |
| 135 | inline int acpi_battery_present(struct acpi_battery *battery) |
| 136 | { |
| 137 | return battery->device->status.battery_present; |
| 138 | } |
| 139 | |
| 140 | static int acpi_battery_technology(struct acpi_battery *battery) |
| 141 | { |
| 142 | if (!strcasecmp("NiCd", battery->type)) |
| 143 | return POWER_SUPPLY_TECHNOLOGY_NiCd; |
| 144 | if (!strcasecmp("NiMH", battery->type)) |
| 145 | return POWER_SUPPLY_TECHNOLOGY_NiMH; |
| 146 | if (!strcasecmp("LION", battery->type)) |
| 147 | return POWER_SUPPLY_TECHNOLOGY_LION; |
| 148 | if (!strncasecmp("LI-ION", battery->type, 6)) |
| 149 | return POWER_SUPPLY_TECHNOLOGY_LION; |
| 150 | if (!strcasecmp("LiP", battery->type)) |
| 151 | return POWER_SUPPLY_TECHNOLOGY_LIPO; |
| 152 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; |
| 153 | } |
| 154 | |
| 155 | static int acpi_battery_get_state(struct acpi_battery *battery); |
| 156 | |
| 157 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
| 158 | { |
| 159 | /* either charging or discharging */ |
| 160 | if (battery->state != 0) |
| 161 | return 0; |
| 162 | |
| 163 | /* battery not reporting charge */ |
| 164 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || |
| 165 | battery->capacity_now == 0) |
| 166 | return 0; |
| 167 | |
| 168 | /* good batteries update full_charge as the batteries degrade */ |
| 169 | if (battery->full_charge_capacity == battery->capacity_now) |
| 170 | return 1; |
| 171 | |
| 172 | /* fallback to using design values for broken batteries */ |
| 173 | if (battery->design_capacity == battery->capacity_now) |
| 174 | return 1; |
| 175 | |
| 176 | /* we don't do any sort of metric based on percentages */ |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | static int acpi_battery_get_property(struct power_supply *psy, |
| 181 | enum power_supply_property psp, |
| 182 | union power_supply_propval *val) |
| 183 | { |
| 184 | int ret = 0; |
| 185 | struct acpi_battery *battery = to_acpi_battery(psy); |
| 186 | |
| 187 | if (acpi_battery_present(battery)) { |
| 188 | /* run battery update only if it is present */ |
| 189 | acpi_battery_get_state(battery); |
| 190 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) |
| 191 | return -ENODEV; |
| 192 | switch (psp) { |
| 193 | case POWER_SUPPLY_PROP_STATUS: |
| 194 | if (battery->state & 0x01) |
| 195 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
| 196 | else if (battery->state & 0x02) |
| 197 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
| 198 | else if (acpi_battery_is_charged(battery)) |
| 199 | val->intval = POWER_SUPPLY_STATUS_FULL; |
| 200 | else |
| 201 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |
| 202 | break; |
| 203 | case POWER_SUPPLY_PROP_PRESENT: |
| 204 | val->intval = acpi_battery_present(battery); |
| 205 | break; |
| 206 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
| 207 | val->intval = acpi_battery_technology(battery); |
| 208 | break; |
| 209 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
| 210 | val->intval = battery->cycle_count; |
| 211 | break; |
| 212 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
| 213 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
| 214 | ret = -ENODEV; |
| 215 | else |
| 216 | val->intval = battery->design_voltage * 1000; |
| 217 | break; |
| 218 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| 219 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
| 220 | ret = -ENODEV; |
| 221 | else |
| 222 | val->intval = battery->voltage_now * 1000; |
| 223 | break; |
| 224 | case POWER_SUPPLY_PROP_CURRENT_NOW: |
| 225 | case POWER_SUPPLY_PROP_POWER_NOW: |
| 226 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
| 227 | ret = -ENODEV; |
| 228 | else |
| 229 | val->intval = battery->rate_now * 1000; |
| 230 | break; |
| 231 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
| 232 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
| 233 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
| 234 | ret = -ENODEV; |
| 235 | else |
| 236 | val->intval = battery->design_capacity * 1000; |
| 237 | break; |
| 238 | case POWER_SUPPLY_PROP_CHARGE_FULL: |
| 239 | case POWER_SUPPLY_PROP_ENERGY_FULL: |
| 240 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
| 241 | ret = -ENODEV; |
| 242 | else |
| 243 | val->intval = battery->full_charge_capacity * 1000; |
| 244 | break; |
| 245 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
| 246 | case POWER_SUPPLY_PROP_ENERGY_NOW: |
| 247 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
| 248 | ret = -ENODEV; |
| 249 | else |
| 250 | val->intval = battery->capacity_now * 1000; |
| 251 | break; |
| 252 | case POWER_SUPPLY_PROP_MODEL_NAME: |
| 253 | val->strval = battery->model_number; |
| 254 | break; |
| 255 | case POWER_SUPPLY_PROP_MANUFACTURER: |
| 256 | val->strval = battery->oem_info; |
| 257 | break; |
| 258 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
| 259 | val->strval = battery->serial_number; |
| 260 | break; |
| 261 | default: |
| 262 | ret = -EINVAL; |
| 263 | } |
| 264 | return ret; |
| 265 | } |
| 266 | |
| 267 | static enum power_supply_property charge_battery_props[] = { |
| 268 | POWER_SUPPLY_PROP_STATUS, |
| 269 | POWER_SUPPLY_PROP_PRESENT, |
| 270 | POWER_SUPPLY_PROP_TECHNOLOGY, |
| 271 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
| 272 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
| 273 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| 274 | POWER_SUPPLY_PROP_CURRENT_NOW, |
| 275 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
| 276 | POWER_SUPPLY_PROP_CHARGE_FULL, |
| 277 | POWER_SUPPLY_PROP_CHARGE_NOW, |
| 278 | POWER_SUPPLY_PROP_MODEL_NAME, |
| 279 | POWER_SUPPLY_PROP_MANUFACTURER, |
| 280 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
| 281 | }; |
| 282 | |
| 283 | static enum power_supply_property energy_battery_props[] = { |
| 284 | POWER_SUPPLY_PROP_STATUS, |
| 285 | POWER_SUPPLY_PROP_PRESENT, |
| 286 | POWER_SUPPLY_PROP_TECHNOLOGY, |
| 287 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
| 288 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
| 289 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| 290 | POWER_SUPPLY_PROP_POWER_NOW, |
| 291 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
| 292 | POWER_SUPPLY_PROP_ENERGY_FULL, |
| 293 | POWER_SUPPLY_PROP_ENERGY_NOW, |
| 294 | POWER_SUPPLY_PROP_MODEL_NAME, |
| 295 | POWER_SUPPLY_PROP_MANUFACTURER, |
| 296 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
| 297 | }; |
| 298 | |
| 299 | #ifdef CONFIG_ACPI_PROCFS_POWER |
| 300 | inline char *acpi_battery_units(struct acpi_battery *battery) |
| 301 | { |
| 302 | return (battery->power_unit)?"mA":"mW"; |
| 303 | } |
| 304 | #endif |
| 305 | |
| 306 | /* -------------------------------------------------------------------------- |
| 307 | Battery Management |
| 308 | -------------------------------------------------------------------------- */ |
| 309 | struct acpi_offsets { |
| 310 | size_t offset; /* offset inside struct acpi_sbs_battery */ |
| 311 | u8 mode; /* int or string? */ |
| 312 | }; |
| 313 | |
| 314 | static struct acpi_offsets state_offsets[] = { |
| 315 | {offsetof(struct acpi_battery, state), 0}, |
| 316 | {offsetof(struct acpi_battery, rate_now), 0}, |
| 317 | {offsetof(struct acpi_battery, capacity_now), 0}, |
| 318 | {offsetof(struct acpi_battery, voltage_now), 0}, |
| 319 | }; |
| 320 | |
| 321 | static struct acpi_offsets info_offsets[] = { |
| 322 | {offsetof(struct acpi_battery, power_unit), 0}, |
| 323 | {offsetof(struct acpi_battery, design_capacity), 0}, |
| 324 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
| 325 | {offsetof(struct acpi_battery, technology), 0}, |
| 326 | {offsetof(struct acpi_battery, design_voltage), 0}, |
| 327 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, |
| 328 | {offsetof(struct acpi_battery, design_capacity_low), 0}, |
| 329 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, |
| 330 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, |
| 331 | {offsetof(struct acpi_battery, model_number), 1}, |
| 332 | {offsetof(struct acpi_battery, serial_number), 1}, |
| 333 | {offsetof(struct acpi_battery, type), 1}, |
| 334 | {offsetof(struct acpi_battery, oem_info), 1}, |
| 335 | }; |
| 336 | |
| 337 | static struct acpi_offsets extended_info_offsets[] = { |
| 338 | {offsetof(struct acpi_battery, power_unit), 0}, |
| 339 | {offsetof(struct acpi_battery, design_capacity), 0}, |
| 340 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
| 341 | {offsetof(struct acpi_battery, technology), 0}, |
| 342 | {offsetof(struct acpi_battery, design_voltage), 0}, |
| 343 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, |
| 344 | {offsetof(struct acpi_battery, design_capacity_low), 0}, |
| 345 | {offsetof(struct acpi_battery, cycle_count), 0}, |
| 346 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, |
| 347 | {offsetof(struct acpi_battery, max_sampling_time), 0}, |
| 348 | {offsetof(struct acpi_battery, min_sampling_time), 0}, |
| 349 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, |
| 350 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, |
| 351 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, |
| 352 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, |
| 353 | {offsetof(struct acpi_battery, model_number), 1}, |
| 354 | {offsetof(struct acpi_battery, serial_number), 1}, |
| 355 | {offsetof(struct acpi_battery, type), 1}, |
| 356 | {offsetof(struct acpi_battery, oem_info), 1}, |
| 357 | }; |
| 358 | |
| 359 | static int extract_package(struct acpi_battery *battery, |
| 360 | union acpi_object *package, |
| 361 | struct acpi_offsets *offsets, int num) |
| 362 | { |
| 363 | int i; |
| 364 | union acpi_object *element; |
| 365 | if (package->type != ACPI_TYPE_PACKAGE) |
| 366 | return -EFAULT; |
| 367 | for (i = 0; i < num; ++i) { |
| 368 | if (package->package.count <= i) |
| 369 | return -EFAULT; |
| 370 | element = &package->package.elements[i]; |
| 371 | if (offsets[i].mode) { |
| 372 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
| 373 | if (element->type == ACPI_TYPE_STRING || |
| 374 | element->type == ACPI_TYPE_BUFFER) |
| 375 | strncpy(ptr, element->string.pointer, 32); |
| 376 | else if (element->type == ACPI_TYPE_INTEGER) { |
| 377 | strncpy(ptr, (u8 *)&element->integer.value, |
| 378 | sizeof(u64)); |
| 379 | ptr[sizeof(u64)] = 0; |
| 380 | } else |
| 381 | *ptr = 0; /* don't have value */ |
| 382 | } else { |
| 383 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
| 384 | *x = (element->type == ACPI_TYPE_INTEGER) ? |
| 385 | element->integer.value : -1; |
| 386 | } |
| 387 | } |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | static int acpi_battery_get_status(struct acpi_battery *battery) |
| 392 | { |
| 393 | if (acpi_bus_get_status(battery->device)) { |
| 394 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
| 395 | return -ENODEV; |
| 396 | } |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | static int acpi_battery_get_info(struct acpi_battery *battery) |
| 401 | { |
| 402 | int result = -EFAULT; |
| 403 | acpi_status status = 0; |
| 404 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)? |
| 405 | "_BIX" : "_BIF"; |
| 406 | |
| 407 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 408 | |
| 409 | if (!acpi_battery_present(battery)) |
| 410 | return 0; |
| 411 | mutex_lock(&battery->lock); |
| 412 | status = acpi_evaluate_object(battery->device->handle, name, |
| 413 | NULL, &buffer); |
| 414 | mutex_unlock(&battery->lock); |
| 415 | |
| 416 | if (ACPI_FAILURE(status)) { |
| 417 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
| 418 | return -ENODEV; |
| 419 | } |
| 420 | if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) |
| 421 | result = extract_package(battery, buffer.pointer, |
| 422 | extended_info_offsets, |
| 423 | ARRAY_SIZE(extended_info_offsets)); |
| 424 | else |
| 425 | result = extract_package(battery, buffer.pointer, |
| 426 | info_offsets, ARRAY_SIZE(info_offsets)); |
| 427 | kfree(buffer.pointer); |
| 428 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
| 429 | battery->full_charge_capacity = battery->design_capacity; |
| 430 | return result; |
| 431 | } |
| 432 | |
| 433 | static int acpi_battery_get_state(struct acpi_battery *battery) |
| 434 | { |
| 435 | int result = 0; |
| 436 | acpi_status status = 0; |
| 437 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 438 | |
| 439 | if (!acpi_battery_present(battery)) |
| 440 | return 0; |
| 441 | |
| 442 | if (battery->update_time && |
| 443 | time_before(jiffies, battery->update_time + |
| 444 | msecs_to_jiffies(cache_time))) |
| 445 | return 0; |
| 446 | |
| 447 | mutex_lock(&battery->lock); |
| 448 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
| 449 | NULL, &buffer); |
| 450 | mutex_unlock(&battery->lock); |
| 451 | |
| 452 | if (ACPI_FAILURE(status)) { |
| 453 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
| 454 | return -ENODEV; |
| 455 | } |
| 456 | |
| 457 | result = extract_package(battery, buffer.pointer, |
| 458 | state_offsets, ARRAY_SIZE(state_offsets)); |
| 459 | battery->update_time = jiffies; |
| 460 | kfree(buffer.pointer); |
| 461 | |
| 462 | if (test_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags) && |
| 463 | battery->rate_now != -1) |
| 464 | battery->rate_now = abs((s16)battery->rate_now); |
| 465 | |
| 466 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
| 467 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) |
| 468 | battery->capacity_now = (battery->capacity_now * |
| 469 | battery->full_charge_capacity) / 100; |
| 470 | return result; |
| 471 | } |
| 472 | |
| 473 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
| 474 | { |
| 475 | acpi_status status = 0; |
| 476 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
| 477 | struct acpi_object_list arg_list = { 1, &arg0 }; |
| 478 | |
| 479 | if (!acpi_battery_present(battery) || |
| 480 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
| 481 | return -ENODEV; |
| 482 | |
| 483 | arg0.integer.value = battery->alarm; |
| 484 | |
| 485 | mutex_lock(&battery->lock); |
| 486 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
| 487 | &arg_list, NULL); |
| 488 | mutex_unlock(&battery->lock); |
| 489 | |
| 490 | if (ACPI_FAILURE(status)) |
| 491 | return -ENODEV; |
| 492 | |
| 493 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
| 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
| 498 | { |
| 499 | acpi_status status = AE_OK; |
| 500 | acpi_handle handle = NULL; |
| 501 | |
| 502 | /* See if alarms are supported, and if so, set default */ |
| 503 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
| 504 | if (ACPI_FAILURE(status)) { |
| 505 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
| 506 | return 0; |
| 507 | } |
| 508 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
| 509 | if (!battery->alarm) |
| 510 | battery->alarm = battery->design_capacity_warning; |
| 511 | return acpi_battery_set_alarm(battery); |
| 512 | } |
| 513 | |
| 514 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
| 515 | struct device_attribute *attr, |
| 516 | char *buf) |
| 517 | { |
| 518 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
| 519 | return sprintf(buf, "%d\n", battery->alarm * 1000); |
| 520 | } |
| 521 | |
| 522 | static ssize_t acpi_battery_alarm_store(struct device *dev, |
| 523 | struct device_attribute *attr, |
| 524 | const char *buf, size_t count) |
| 525 | { |
| 526 | unsigned long x; |
| 527 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
| 528 | if (sscanf(buf, "%ld\n", &x) == 1) |
| 529 | battery->alarm = x/1000; |
| 530 | if (acpi_battery_present(battery)) |
| 531 | acpi_battery_set_alarm(battery); |
| 532 | return count; |
| 533 | } |
| 534 | |
| 535 | static struct device_attribute alarm_attr = { |
| 536 | .attr = {.name = "alarm", .mode = 0644}, |
| 537 | .show = acpi_battery_alarm_show, |
| 538 | .store = acpi_battery_alarm_store, |
| 539 | }; |
| 540 | |
| 541 | static int sysfs_add_battery(struct acpi_battery *battery) |
| 542 | { |
| 543 | int result; |
| 544 | |
| 545 | if (battery->power_unit) { |
| 546 | battery->bat.properties = charge_battery_props; |
| 547 | battery->bat.num_properties = |
| 548 | ARRAY_SIZE(charge_battery_props); |
| 549 | } else { |
| 550 | battery->bat.properties = energy_battery_props; |
| 551 | battery->bat.num_properties = |
| 552 | ARRAY_SIZE(energy_battery_props); |
| 553 | } |
| 554 | |
| 555 | battery->bat.name = acpi_device_bid(battery->device); |
| 556 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; |
| 557 | battery->bat.get_property = acpi_battery_get_property; |
| 558 | |
| 559 | result = power_supply_register(&battery->device->dev, &battery->bat); |
| 560 | if (result) |
| 561 | return result; |
| 562 | return device_create_file(battery->bat.dev, &alarm_attr); |
| 563 | } |
| 564 | |
| 565 | static void sysfs_remove_battery(struct acpi_battery *battery) |
| 566 | { |
| 567 | if (!battery->bat.dev) |
| 568 | return; |
| 569 | device_remove_file(battery->bat.dev, &alarm_attr); |
| 570 | power_supply_unregister(&battery->bat); |
| 571 | battery->bat.dev = NULL; |
| 572 | } |
| 573 | |
| 574 | static void acpi_battery_quirks(struct acpi_battery *battery) |
| 575 | { |
| 576 | if (dmi_name_in_vendors("Acer") && battery->power_unit) { |
| 577 | set_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags); |
| 578 | } |
| 579 | } |
| 580 | |
| 581 | /* |
| 582 | * According to the ACPI spec, some kinds of primary batteries can |
| 583 | * report percentage battery remaining capacity directly to OS. |
| 584 | * In this case, it reports the Last Full Charged Capacity == 100 |
| 585 | * and BatteryPresentRate == 0xFFFFFFFF. |
| 586 | * |
| 587 | * Now we found some battery reports percentage remaining capacity |
| 588 | * even if it's rechargeable. |
| 589 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 |
| 590 | * |
| 591 | * Handle this correctly so that they won't break userspace. |
| 592 | */ |
| 593 | static void acpi_battery_quirks2(struct acpi_battery *battery) |
| 594 | { |
| 595 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
| 596 | return ; |
| 597 | |
| 598 | if (battery->full_charge_capacity == 100 && |
| 599 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && |
| 600 | battery->capacity_now >=0 && battery->capacity_now <= 100) { |
| 601 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
| 602 | battery->full_charge_capacity = battery->design_capacity; |
| 603 | battery->capacity_now = (battery->capacity_now * |
| 604 | battery->full_charge_capacity) / 100; |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | static int acpi_battery_update(struct acpi_battery *battery) |
| 609 | { |
| 610 | int result, old_present = acpi_battery_present(battery); |
| 611 | result = acpi_battery_get_status(battery); |
| 612 | if (result) |
| 613 | return result; |
| 614 | if (!acpi_battery_present(battery)) { |
| 615 | sysfs_remove_battery(battery); |
| 616 | battery->update_time = 0; |
| 617 | return 0; |
| 618 | } |
| 619 | if (!battery->update_time || |
| 620 | old_present != acpi_battery_present(battery)) { |
| 621 | result = acpi_battery_get_info(battery); |
| 622 | if (result) |
| 623 | return result; |
| 624 | acpi_battery_quirks(battery); |
| 625 | acpi_battery_init_alarm(battery); |
| 626 | } |
| 627 | if (!battery->bat.dev) |
| 628 | sysfs_add_battery(battery); |
| 629 | result = acpi_battery_get_state(battery); |
| 630 | acpi_battery_quirks2(battery); |
| 631 | return result; |
| 632 | } |
| 633 | |
| 634 | /* -------------------------------------------------------------------------- |
| 635 | FS Interface (/proc) |
| 636 | -------------------------------------------------------------------------- */ |
| 637 | |
| 638 | #ifdef CONFIG_ACPI_PROCFS_POWER |
| 639 | static struct proc_dir_entry *acpi_battery_dir; |
| 640 | |
| 641 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
| 642 | { |
| 643 | struct acpi_battery *battery = seq->private; |
| 644 | |
| 645 | if (result) |
| 646 | goto end; |
| 647 | |
| 648 | seq_printf(seq, "present: %s\n", |
| 649 | acpi_battery_present(battery)?"yes":"no"); |
| 650 | if (!acpi_battery_present(battery)) |
| 651 | goto end; |
| 652 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
| 653 | seq_printf(seq, "design capacity: unknown\n"); |
| 654 | else |
| 655 | seq_printf(seq, "design capacity: %d %sh\n", |
| 656 | battery->design_capacity, |
| 657 | acpi_battery_units(battery)); |
| 658 | |
| 659 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
| 660 | seq_printf(seq, "last full capacity: unknown\n"); |
| 661 | else |
| 662 | seq_printf(seq, "last full capacity: %d %sh\n", |
| 663 | battery->full_charge_capacity, |
| 664 | acpi_battery_units(battery)); |
| 665 | |
| 666 | seq_printf(seq, "battery technology: %srechargeable\n", |
| 667 | (!battery->technology)?"non-":""); |
| 668 | |
| 669 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
| 670 | seq_printf(seq, "design voltage: unknown\n"); |
| 671 | else |
| 672 | seq_printf(seq, "design voltage: %d mV\n", |
| 673 | battery->design_voltage); |
| 674 | seq_printf(seq, "design capacity warning: %d %sh\n", |
| 675 | battery->design_capacity_warning, |
| 676 | acpi_battery_units(battery)); |
| 677 | seq_printf(seq, "design capacity low: %d %sh\n", |
| 678 | battery->design_capacity_low, |
| 679 | acpi_battery_units(battery)); |
| 680 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); |
| 681 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
| 682 | battery->capacity_granularity_1, |
| 683 | acpi_battery_units(battery)); |
| 684 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
| 685 | battery->capacity_granularity_2, |
| 686 | acpi_battery_units(battery)); |
| 687 | seq_printf(seq, "model number: %s\n", battery->model_number); |
| 688 | seq_printf(seq, "serial number: %s\n", battery->serial_number); |
| 689 | seq_printf(seq, "battery type: %s\n", battery->type); |
| 690 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); |
| 691 | end: |
| 692 | if (result) |
| 693 | seq_printf(seq, "ERROR: Unable to read battery info\n"); |
| 694 | return result; |
| 695 | } |
| 696 | |
| 697 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
| 698 | { |
| 699 | struct acpi_battery *battery = seq->private; |
| 700 | |
| 701 | if (result) |
| 702 | goto end; |
| 703 | |
| 704 | seq_printf(seq, "present: %s\n", |
| 705 | acpi_battery_present(battery)?"yes":"no"); |
| 706 | if (!acpi_battery_present(battery)) |
| 707 | goto end; |
| 708 | |
| 709 | seq_printf(seq, "capacity state: %s\n", |
| 710 | (battery->state & 0x04)?"critical":"ok"); |
| 711 | if ((battery->state & 0x01) && (battery->state & 0x02)) |
| 712 | seq_printf(seq, |
| 713 | "charging state: charging/discharging\n"); |
| 714 | else if (battery->state & 0x01) |
| 715 | seq_printf(seq, "charging state: discharging\n"); |
| 716 | else if (battery->state & 0x02) |
| 717 | seq_printf(seq, "charging state: charging\n"); |
| 718 | else |
| 719 | seq_printf(seq, "charging state: charged\n"); |
| 720 | |
| 721 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
| 722 | seq_printf(seq, "present rate: unknown\n"); |
| 723 | else |
| 724 | seq_printf(seq, "present rate: %d %s\n", |
| 725 | battery->rate_now, acpi_battery_units(battery)); |
| 726 | |
| 727 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
| 728 | seq_printf(seq, "remaining capacity: unknown\n"); |
| 729 | else |
| 730 | seq_printf(seq, "remaining capacity: %d %sh\n", |
| 731 | battery->capacity_now, acpi_battery_units(battery)); |
| 732 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
| 733 | seq_printf(seq, "present voltage: unknown\n"); |
| 734 | else |
| 735 | seq_printf(seq, "present voltage: %d mV\n", |
| 736 | battery->voltage_now); |
| 737 | end: |
| 738 | if (result) |
| 739 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
| 740 | |
| 741 | return result; |
| 742 | } |
| 743 | |
| 744 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
| 745 | { |
| 746 | struct acpi_battery *battery = seq->private; |
| 747 | |
| 748 | if (result) |
| 749 | goto end; |
| 750 | |
| 751 | if (!acpi_battery_present(battery)) { |
| 752 | seq_printf(seq, "present: no\n"); |
| 753 | goto end; |
| 754 | } |
| 755 | seq_printf(seq, "alarm: "); |
| 756 | if (!battery->alarm) |
| 757 | seq_printf(seq, "unsupported\n"); |
| 758 | else |
| 759 | seq_printf(seq, "%u %sh\n", battery->alarm, |
| 760 | acpi_battery_units(battery)); |
| 761 | end: |
| 762 | if (result) |
| 763 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); |
| 764 | return result; |
| 765 | } |
| 766 | |
| 767 | static ssize_t acpi_battery_write_alarm(struct file *file, |
| 768 | const char __user * buffer, |
| 769 | size_t count, loff_t * ppos) |
| 770 | { |
| 771 | int result = 0; |
| 772 | char alarm_string[12] = { '\0' }; |
| 773 | struct seq_file *m = file->private_data; |
| 774 | struct acpi_battery *battery = m->private; |
| 775 | |
| 776 | if (!battery || (count > sizeof(alarm_string) - 1)) |
| 777 | return -EINVAL; |
| 778 | if (!acpi_battery_present(battery)) { |
| 779 | result = -ENODEV; |
| 780 | goto end; |
| 781 | } |
| 782 | if (copy_from_user(alarm_string, buffer, count)) { |
| 783 | result = -EFAULT; |
| 784 | goto end; |
| 785 | } |
| 786 | alarm_string[count] = '\0'; |
| 787 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
| 788 | result = acpi_battery_set_alarm(battery); |
| 789 | end: |
| 790 | if (!result) |
| 791 | return count; |
| 792 | return result; |
| 793 | } |
| 794 | |
| 795 | typedef int(*print_func)(struct seq_file *seq, int result); |
| 796 | |
| 797 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { |
| 798 | acpi_battery_print_info, |
| 799 | acpi_battery_print_state, |
| 800 | acpi_battery_print_alarm, |
| 801 | }; |
| 802 | |
| 803 | static int acpi_battery_read(int fid, struct seq_file *seq) |
| 804 | { |
| 805 | struct acpi_battery *battery = seq->private; |
| 806 | int result = acpi_battery_update(battery); |
| 807 | return acpi_print_funcs[fid](seq, result); |
| 808 | } |
| 809 | |
| 810 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
| 811 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ |
| 812 | { \ |
| 813 | return acpi_battery_read(_name##_tag, seq); \ |
| 814 | } \ |
| 815 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ |
| 816 | { \ |
| 817 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ |
| 818 | } |
| 819 | |
| 820 | DECLARE_FILE_FUNCTIONS(info); |
| 821 | DECLARE_FILE_FUNCTIONS(state); |
| 822 | DECLARE_FILE_FUNCTIONS(alarm); |
| 823 | |
| 824 | #undef DECLARE_FILE_FUNCTIONS |
| 825 | |
| 826 | #define FILE_DESCRIPTION_RO(_name) \ |
| 827 | { \ |
| 828 | .name = __stringify(_name), \ |
| 829 | .mode = S_IRUGO, \ |
| 830 | .ops = { \ |
| 831 | .open = acpi_battery_##_name##_open_fs, \ |
| 832 | .read = seq_read, \ |
| 833 | .llseek = seq_lseek, \ |
| 834 | .release = single_release, \ |
| 835 | .owner = THIS_MODULE, \ |
| 836 | }, \ |
| 837 | } |
| 838 | |
| 839 | #define FILE_DESCRIPTION_RW(_name) \ |
| 840 | { \ |
| 841 | .name = __stringify(_name), \ |
| 842 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ |
| 843 | .ops = { \ |
| 844 | .open = acpi_battery_##_name##_open_fs, \ |
| 845 | .read = seq_read, \ |
| 846 | .llseek = seq_lseek, \ |
| 847 | .write = acpi_battery_write_##_name, \ |
| 848 | .release = single_release, \ |
| 849 | .owner = THIS_MODULE, \ |
| 850 | }, \ |
| 851 | } |
| 852 | |
| 853 | static struct battery_file { |
| 854 | struct file_operations ops; |
| 855 | mode_t mode; |
| 856 | const char *name; |
| 857 | } acpi_battery_file[] = { |
| 858 | FILE_DESCRIPTION_RO(info), |
| 859 | FILE_DESCRIPTION_RO(state), |
| 860 | FILE_DESCRIPTION_RW(alarm), |
| 861 | }; |
| 862 | |
| 863 | #undef FILE_DESCRIPTION_RO |
| 864 | #undef FILE_DESCRIPTION_RW |
| 865 | |
| 866 | static int acpi_battery_add_fs(struct acpi_device *device) |
| 867 | { |
| 868 | struct proc_dir_entry *entry = NULL; |
| 869 | int i; |
| 870 | |
| 871 | if (!acpi_device_dir(device)) { |
| 872 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
| 873 | acpi_battery_dir); |
| 874 | if (!acpi_device_dir(device)) |
| 875 | return -ENODEV; |
| 876 | } |
| 877 | |
| 878 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
| 879 | entry = proc_create_data(acpi_battery_file[i].name, |
| 880 | acpi_battery_file[i].mode, |
| 881 | acpi_device_dir(device), |
| 882 | &acpi_battery_file[i].ops, |
| 883 | acpi_driver_data(device)); |
| 884 | if (!entry) |
| 885 | return -ENODEV; |
| 886 | } |
| 887 | return 0; |
| 888 | } |
| 889 | |
| 890 | static void acpi_battery_remove_fs(struct acpi_device *device) |
| 891 | { |
| 892 | int i; |
| 893 | if (!acpi_device_dir(device)) |
| 894 | return; |
| 895 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) |
| 896 | remove_proc_entry(acpi_battery_file[i].name, |
| 897 | acpi_device_dir(device)); |
| 898 | |
| 899 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
| 900 | acpi_device_dir(device) = NULL; |
| 901 | } |
| 902 | |
| 903 | #endif |
| 904 | |
| 905 | /* -------------------------------------------------------------------------- |
| 906 | Driver Interface |
| 907 | -------------------------------------------------------------------------- */ |
| 908 | |
| 909 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
| 910 | { |
| 911 | struct acpi_battery *battery = acpi_driver_data(device); |
| 912 | struct device *old; |
| 913 | |
| 914 | if (!battery) |
| 915 | return; |
| 916 | old = battery->bat.dev; |
| 917 | acpi_battery_update(battery); |
| 918 | acpi_bus_generate_proc_event(device, event, |
| 919 | acpi_battery_present(battery)); |
| 920 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
| 921 | dev_name(&device->dev), event, |
| 922 | acpi_battery_present(battery)); |
| 923 | /* acpi_battery_update could remove power_supply object */ |
| 924 | if (old && battery->bat.dev) |
| 925 | power_supply_changed(&battery->bat); |
| 926 | } |
| 927 | |
| 928 | static int acpi_battery_add(struct acpi_device *device) |
| 929 | { |
| 930 | int result = 0; |
| 931 | struct acpi_battery *battery = NULL; |
| 932 | acpi_handle handle; |
| 933 | if (!device) |
| 934 | return -EINVAL; |
| 935 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
| 936 | if (!battery) |
| 937 | return -ENOMEM; |
| 938 | battery->device = device; |
| 939 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
| 940 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); |
| 941 | device->driver_data = battery; |
| 942 | mutex_init(&battery->lock); |
| 943 | if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle, |
| 944 | "_BIX", &handle))) |
| 945 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
| 946 | acpi_battery_update(battery); |
| 947 | #ifdef CONFIG_ACPI_PROCFS_POWER |
| 948 | result = acpi_battery_add_fs(device); |
| 949 | #endif |
| 950 | if (!result) { |
| 951 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
| 952 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
| 953 | device->status.battery_present ? "present" : "absent"); |
| 954 | } else { |
| 955 | #ifdef CONFIG_ACPI_PROCFS_POWER |
| 956 | acpi_battery_remove_fs(device); |
| 957 | #endif |
| 958 | kfree(battery); |
| 959 | } |
| 960 | return result; |
| 961 | } |
| 962 | |
| 963 | static int acpi_battery_remove(struct acpi_device *device, int type) |
| 964 | { |
| 965 | struct acpi_battery *battery = NULL; |
| 966 | |
| 967 | if (!device || !acpi_driver_data(device)) |
| 968 | return -EINVAL; |
| 969 | battery = acpi_driver_data(device); |
| 970 | #ifdef CONFIG_ACPI_PROCFS_POWER |
| 971 | acpi_battery_remove_fs(device); |
| 972 | #endif |
| 973 | sysfs_remove_battery(battery); |
| 974 | mutex_destroy(&battery->lock); |
| 975 | kfree(battery); |
| 976 | return 0; |
| 977 | } |
| 978 | |
| 979 | /* this is needed to learn about changes made in suspended state */ |
| 980 | static int acpi_battery_resume(struct acpi_device *device) |
| 981 | { |
| 982 | struct acpi_battery *battery; |
| 983 | if (!device) |
| 984 | return -EINVAL; |
| 985 | battery = acpi_driver_data(device); |
| 986 | battery->update_time = 0; |
| 987 | acpi_battery_update(battery); |
| 988 | return 0; |
| 989 | } |
| 990 | |
| 991 | static struct acpi_driver acpi_battery_driver = { |
| 992 | .name = "battery", |
| 993 | .class = ACPI_BATTERY_CLASS, |
| 994 | .ids = battery_device_ids, |
| 995 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
| 996 | .ops = { |
| 997 | .add = acpi_battery_add, |
| 998 | .resume = acpi_battery_resume, |
| 999 | .remove = acpi_battery_remove, |
| 1000 | .notify = acpi_battery_notify, |
| 1001 | }, |
| 1002 | }; |
| 1003 | |
| 1004 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
| 1005 | { |
| 1006 | if (acpi_disabled) |
| 1007 | return; |
| 1008 | #ifdef CONFIG_ACPI_PROCFS_POWER |
| 1009 | acpi_battery_dir = acpi_lock_battery_dir(); |
| 1010 | if (!acpi_battery_dir) |
| 1011 | return; |
| 1012 | #endif |
| 1013 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
| 1014 | #ifdef CONFIG_ACPI_PROCFS_POWER |
| 1015 | acpi_unlock_battery_dir(acpi_battery_dir); |
| 1016 | #endif |
| 1017 | return; |
| 1018 | } |
| 1019 | return; |
| 1020 | } |
| 1021 | |
| 1022 | static int __init acpi_battery_init(void) |
| 1023 | { |
| 1024 | async_schedule(acpi_battery_init_async, NULL); |
| 1025 | return 0; |
| 1026 | } |
| 1027 | |
| 1028 | static void __exit acpi_battery_exit(void) |
| 1029 | { |
| 1030 | acpi_bus_unregister_driver(&acpi_battery_driver); |
| 1031 | #ifdef CONFIG_ACPI_PROCFS_POWER |
| 1032 | acpi_unlock_battery_dir(acpi_battery_dir); |
| 1033 | #endif |
| 1034 | } |
| 1035 | |
| 1036 | module_init(acpi_battery_init); |
| 1037 | module_exit(acpi_battery_exit); |