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Merge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[net-next-2.6.git] / drivers / acpi / battery.c
CommitLineData
1da177e4 1/*
aa650bbd 2 * battery.c - ACPI Battery Driver (Revision: 2.0)
1da177e4 3 *
aa650bbd
AS		 4 * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
5 * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
1da177e4
LT		 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>
f1d4661a 32#include <linux/jiffies.h>
0f66af53 33#include <linux/async.h>
bc76f90b 34#include <linux/dmi.h>
5a0e3ad6 35#include <linux/slab.h>
d7380965 36
fdcedbba 37#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4
LT		 38#include <linux/proc_fs.h>
39#include <linux/seq_file.h>
40#include <asm/uaccess.h>
d7380965 41#endif
1da177e4
LT		 42
43#include <acpi/acpi_bus.h>
44#include <acpi/acpi_drivers.h>
45
97749cd9 46#ifdef CONFIG_ACPI_SYSFS_POWER
d7380965 47#include <linux/power_supply.h>
97749cd9 48#endif
d7380965 49
a192a958
LB		 50#define PREFIX "ACPI: "
51
1da177e4
LT		 52#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
53
1da177e4 54#define ACPI_BATTERY_CLASS "battery"
1da177e4 55#define ACPI_BATTERY_DEVICE_NAME "Battery"
1da177e4
LT		 56#define ACPI_BATTERY_NOTIFY_STATUS 0x80
57#define ACPI_BATTERY_NOTIFY_INFO 0x81
c67fcd67 58#define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82
1da177e4 59
1da177e4 60#define _COMPONENT ACPI_BATTERY_COMPONENT
b6ce4083 61
f52fd66d 62ACPI_MODULE_NAME("battery");
1da177e4 63
f52fd66d 64MODULE_AUTHOR("Paul Diefenbaugh");
aa650bbd 65MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
7cda93e0 66MODULE_DESCRIPTION("ACPI Battery Driver");
1da177e4
LT		 67MODULE_LICENSE("GPL");
68
f1d4661a
AS		 69static unsigned int cache_time = 1000;
70module_param(cache_time, uint, 0644);
71MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
b6ce4083 72
fdcedbba 73#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832
RT		 74extern struct proc_dir_entry *acpi_lock_battery_dir(void);
75extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
76
d7380965
AS		 77enum acpi_battery_files {
78 info_tag = 0,
79 state_tag,
80 alarm_tag,
81 ACPI_BATTERY_NUMFILES,
82};
83
84#endif
85
1ba90e3a
TR		 86static const struct acpi_device_id battery_device_ids[] = {
87 {"PNP0C0A", 0},
88 {"", 0},
89};
1ba90e3a 90
aa650bbd 91MODULE_DEVICE_TABLE(acpi, battery_device_ids);
1da177e4 92
7b3bcc4a
AS		 93enum {
94 ACPI_BATTERY_ALARM_PRESENT,
c67fcd67
AS		 95 ACPI_BATTERY_XINFO_PRESENT,
96 /* For buggy DSDTs that report negative 16-bit values for either
97 * charging or discharging current and/or report 0 as 65536
98 * due to bad math.
99 */
7b3bcc4a
AS		 100 ACPI_BATTERY_QUIRK_SIGNED16_CURRENT,
101};
78490d82 102
1da177e4 103struct acpi_battery {
038fdea2 104 struct mutex lock;
97749cd9 105#ifdef CONFIG_ACPI_SYSFS_POWER
d7380965 106 struct power_supply bat;
97749cd9 107#endif
f1d4661a
AS		 108 struct acpi_device *device;
109 unsigned long update_time;
7faa144a 110 int rate_now;
d7380965
AS		 111 int capacity_now;
112 int voltage_now;
038fdea2 113 int design_capacity;
d7380965 114 int full_charge_capacity;
038fdea2
AS		 115 int technology;
116 int design_voltage;
117 int design_capacity_warning;
118 int design_capacity_low;
c67fcd67
AS		 119 int cycle_count;
120 int measurement_accuracy;
121 int max_sampling_time;
122 int min_sampling_time;
123 int max_averaging_interval;
124 int min_averaging_interval;
038fdea2
AS		 125 int capacity_granularity_1;
126 int capacity_granularity_2;
f1d4661a 127 int alarm;
038fdea2
AS		 128 char model_number[32];
129 char serial_number[32];
130 char type[32];
131 char oem_info[32];
f1d4661a
AS		 132 int state;
133 int power_unit;
7b3bcc4a 134 unsigned long flags;
1da177e4
LT		 135};
136
d7380965
AS		 137#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
138
78490d82 139inline int acpi_battery_present(struct acpi_battery *battery)
b6ce4083 140{
78490d82
AS		 141 return battery->device->status.battery_present;
142}
038fdea2 143
97749cd9 144#ifdef CONFIG_ACPI_SYSFS_POWER
d7380965
AS		 145static int acpi_battery_technology(struct acpi_battery *battery)
146{
147 if (!strcasecmp("NiCd", battery->type))
148 return POWER_SUPPLY_TECHNOLOGY_NiCd;
149 if (!strcasecmp("NiMH", battery->type))
150 return POWER_SUPPLY_TECHNOLOGY_NiMH;
151 if (!strcasecmp("LION", battery->type))
152 return POWER_SUPPLY_TECHNOLOGY_LION;
ad40e68b 153 if (!strncasecmp("LI-ION", battery->type, 6))
0bde7eee 154 return POWER_SUPPLY_TECHNOLOGY_LION;
d7380965
AS		 155 if (!strcasecmp("LiP", battery->type))
156 return POWER_SUPPLY_TECHNOLOGY_LIPO;
157 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
158}
159
9104476e 160static int acpi_battery_get_state(struct acpi_battery *battery);
b19073a0 161
56f382a0
RH		 162static int acpi_battery_is_charged(struct acpi_battery *battery)
163{
164 /* either charging or discharging */
165 if (battery->state != 0)
166 return 0;
167
168 /* battery not reporting charge */
169 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
170 battery->capacity_now == 0)
171 return 0;
172
173 /* good batteries update full_charge as the batteries degrade */
174 if (battery->full_charge_capacity == battery->capacity_now)
175 return 1;
176
177 /* fallback to using design values for broken batteries */
178 if (battery->design_capacity == battery->capacity_now)
179 return 1;
180
181 /* we don't do any sort of metric based on percentages */
182 return 0;
183}
184
d7380965
AS		 185static int acpi_battery_get_property(struct power_supply *psy,
186 enum power_supply_property psp,
187 union power_supply_propval *val)
188{
189 struct acpi_battery *battery = to_acpi_battery(psy);
190
9104476e
AS		 191 if (acpi_battery_present(battery)) {
192 /* run battery update only if it is present */
193 acpi_battery_get_state(battery);
194 } else if (psp != POWER_SUPPLY_PROP_PRESENT)
d7380965
AS		 195 return -ENODEV;
196 switch (psp) {
197 case POWER_SUPPLY_PROP_STATUS:
198 if (battery->state & 0x01)
199 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
200 else if (battery->state & 0x02)
201 val->intval = POWER_SUPPLY_STATUS_CHARGING;
56f382a0 202 else if (acpi_battery_is_charged(battery))
d7380965 203 val->intval = POWER_SUPPLY_STATUS_FULL;
4c41d3ad
RD		 204 else
205 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
d7380965
AS		 206 break;
207 case POWER_SUPPLY_PROP_PRESENT:
208 val->intval = acpi_battery_present(battery);
209 break;
210 case POWER_SUPPLY_PROP_TECHNOLOGY:
211 val->intval = acpi_battery_technology(battery);
212 break;
c67fcd67
AS		 213 case POWER_SUPPLY_PROP_CYCLE_COUNT:
214 val->intval = battery->cycle_count;
215 break;
d7380965
AS		 216 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
217 val->intval = battery->design_voltage * 1000;
218 break;
219 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
220 val->intval = battery->voltage_now * 1000;
221 break;
222 case POWER_SUPPLY_PROP_CURRENT_NOW:
7faa144a
AS		 223 case POWER_SUPPLY_PROP_POWER_NOW:
224 val->intval = battery->rate_now * 1000;
d7380965
AS		 225 break;
226 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
227 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
228 val->intval = battery->design_capacity * 1000;
229 break;
230 case POWER_SUPPLY_PROP_CHARGE_FULL:
231 case POWER_SUPPLY_PROP_ENERGY_FULL:
232 val->intval = battery->full_charge_capacity * 1000;
233 break;
234 case POWER_SUPPLY_PROP_CHARGE_NOW:
235 case POWER_SUPPLY_PROP_ENERGY_NOW:
236 val->intval = battery->capacity_now * 1000;
237 break;
238 case POWER_SUPPLY_PROP_MODEL_NAME:
239 val->strval = battery->model_number;
240 break;
241 case POWER_SUPPLY_PROP_MANUFACTURER:
242 val->strval = battery->oem_info;
243 break;
7c2670bb 244 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
245 val->strval = battery->serial_number;
246 break;
d7380965
AS		 247 default:
248 return -EINVAL;
249 }
250 return 0;
251}
252
253static enum power_supply_property charge_battery_props[] = {
254 POWER_SUPPLY_PROP_STATUS,
255 POWER_SUPPLY_PROP_PRESENT,
256 POWER_SUPPLY_PROP_TECHNOLOGY,
c67fcd67 257 POWER_SUPPLY_PROP_CYCLE_COUNT,
d7380965
AS		 258 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
259 POWER_SUPPLY_PROP_VOLTAGE_NOW,
260 POWER_SUPPLY_PROP_CURRENT_NOW,
261 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
262 POWER_SUPPLY_PROP_CHARGE_FULL,
263 POWER_SUPPLY_PROP_CHARGE_NOW,
264 POWER_SUPPLY_PROP_MODEL_NAME,
265 POWER_SUPPLY_PROP_MANUFACTURER,
7c2670bb 266 POWER_SUPPLY_PROP_SERIAL_NUMBER,
d7380965
AS		 267};
268
269static enum power_supply_property energy_battery_props[] = {
270 POWER_SUPPLY_PROP_STATUS,
271 POWER_SUPPLY_PROP_PRESENT,
272 POWER_SUPPLY_PROP_TECHNOLOGY,
c67fcd67 273 POWER_SUPPLY_PROP_CYCLE_COUNT,
d7380965
AS		 274 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
275 POWER_SUPPLY_PROP_VOLTAGE_NOW,
7faa144a 276 POWER_SUPPLY_PROP_POWER_NOW,
d7380965
AS		 277 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
278 POWER_SUPPLY_PROP_ENERGY_FULL,
279 POWER_SUPPLY_PROP_ENERGY_NOW,
280 POWER_SUPPLY_PROP_MODEL_NAME,
281 POWER_SUPPLY_PROP_MANUFACTURER,
7c2670bb 282 POWER_SUPPLY_PROP_SERIAL_NUMBER,
d7380965 283};
97749cd9 284#endif
d7380965 285
fdcedbba 286#ifdef CONFIG_ACPI_PROCFS_POWER
f1d4661a 287inline char *acpi_battery_units(struct acpi_battery *battery)
78490d82 288{
f1d4661a 289 return (battery->power_unit)?"mA":"mW";
b6ce4083 290}
d7380965 291#endif
b6ce4083 292
78490d82
AS		 293/* --------------------------------------------------------------------------
294 Battery Management
295 -------------------------------------------------------------------------- */
038fdea2
AS		 296struct acpi_offsets {
297 size_t offset; /* offset inside struct acpi_sbs_battery */
298 u8 mode; /* int or string? */
299};
b6ce4083 300
038fdea2
AS		 301static struct acpi_offsets state_offsets[] = {
302 {offsetof(struct acpi_battery, state), 0},
7faa144a 303 {offsetof(struct acpi_battery, rate_now), 0},
d7380965
AS		 304 {offsetof(struct acpi_battery, capacity_now), 0},
305 {offsetof(struct acpi_battery, voltage_now), 0},
038fdea2 306};
b6ce4083 307
038fdea2
AS		 308static struct acpi_offsets info_offsets[] = {
309 {offsetof(struct acpi_battery, power_unit), 0},
310 {offsetof(struct acpi_battery, design_capacity), 0},
d7380965 311 {offsetof(struct acpi_battery, full_charge_capacity), 0},
038fdea2
AS		 312 {offsetof(struct acpi_battery, technology), 0},
313 {offsetof(struct acpi_battery, design_voltage), 0},
314 {offsetof(struct acpi_battery, design_capacity_warning), 0},
315 {offsetof(struct acpi_battery, design_capacity_low), 0},
316 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
317 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
318 {offsetof(struct acpi_battery, model_number), 1},
319 {offsetof(struct acpi_battery, serial_number), 1},
320 {offsetof(struct acpi_battery, type), 1},
321 {offsetof(struct acpi_battery, oem_info), 1},
322};
b6ce4083 323
c67fcd67
AS		 324static struct acpi_offsets extended_info_offsets[] = {
325 {offsetof(struct acpi_battery, power_unit), 0},
326 {offsetof(struct acpi_battery, design_capacity), 0},
327 {offsetof(struct acpi_battery, full_charge_capacity), 0},
328 {offsetof(struct acpi_battery, technology), 0},
329 {offsetof(struct acpi_battery, design_voltage), 0},
330 {offsetof(struct acpi_battery, design_capacity_warning), 0},
331 {offsetof(struct acpi_battery, design_capacity_low), 0},
332 {offsetof(struct acpi_battery, cycle_count), 0},
333 {offsetof(struct acpi_battery, measurement_accuracy), 0},
334 {offsetof(struct acpi_battery, max_sampling_time), 0},
335 {offsetof(struct acpi_battery, min_sampling_time), 0},
336 {offsetof(struct acpi_battery, max_averaging_interval), 0},
337 {offsetof(struct acpi_battery, min_averaging_interval), 0},
338 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
339 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
340 {offsetof(struct acpi_battery, model_number), 1},
341 {offsetof(struct acpi_battery, serial_number), 1},
342 {offsetof(struct acpi_battery, type), 1},
343 {offsetof(struct acpi_battery, oem_info), 1},
344};
345
038fdea2
AS		 346static int extract_package(struct acpi_battery *battery,
347 union acpi_object *package,
348 struct acpi_offsets *offsets, int num)
349{
106449e8 350 int i;
038fdea2
AS		 351 union acpi_object *element;
352 if (package->type != ACPI_TYPE_PACKAGE)
353 return -EFAULT;
354 for (i = 0; i < num; ++i) {
355 if (package->package.count <= i)
356 return -EFAULT;
357 element = &package->package.elements[i];
358 if (offsets[i].mode) {
106449e8
AS		 359 u8 *ptr = (u8 *)battery + offsets[i].offset;
360 if (element->type == ACPI_TYPE_STRING ||
361 element->type == ACPI_TYPE_BUFFER)
362 strncpy(ptr, element->string.pointer, 32);
363 else if (element->type == ACPI_TYPE_INTEGER) {
364 strncpy(ptr, (u8 *)&element->integer.value,
439913ff
LM		 365 sizeof(u64));
366 ptr[sizeof(u64)] = 0;
b8a1bdb1
AS		 367 } else
368 *ptr = 0; /* don't have value */
038fdea2 369 } else {
b8a1bdb1
AS		 370 int *x = (int *)((u8 *)battery + offsets[i].offset);
371 *x = (element->type == ACPI_TYPE_INTEGER) ?
372 element->integer.value : -1;
038fdea2 373 }
b6ce4083 374 }
b6ce4083
VL		 375 return 0;
376}
377
378static int acpi_battery_get_status(struct acpi_battery *battery)
379{
aa650bbd 380 if (acpi_bus_get_status(battery->device)) {
b6ce4083
VL		 381 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
382 return -ENODEV;
383 }
aa650bbd 384 return 0;
b6ce4083
VL		 385}
386
387static int acpi_battery_get_info(struct acpi_battery *battery)
1da177e4 388{
aa650bbd 389 int result = -EFAULT;
4be44fcd 390 acpi_status status = 0;
c67fcd67
AS		 391 char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)?
392 "_BIX" : "_BIF";
393
4be44fcd 394 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4 395
b6ce4083
VL		 396 if (!acpi_battery_present(battery))
397 return 0;
038fdea2 398 mutex_lock(&battery->lock);
c67fcd67
AS		 399 status = acpi_evaluate_object(battery->device->handle, name,
400 NULL, &buffer);
038fdea2 401 mutex_unlock(&battery->lock);
aa650bbd 402
1da177e4 403 if (ACPI_FAILURE(status)) {
c67fcd67 404 ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name));
d550d98d 405 return -ENODEV;
1da177e4 406 }
c67fcd67
AS		 407 if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags))
408 result = extract_package(battery, buffer.pointer,
409 extended_info_offsets,
410 ARRAY_SIZE(extended_info_offsets));
411 else
412 result = extract_package(battery, buffer.pointer,
413 info_offsets, ARRAY_SIZE(info_offsets));
78490d82 414 kfree(buffer.pointer);
d550d98d 415 return result;
1da177e4
LT		 416}
417
b6ce4083 418static int acpi_battery_get_state(struct acpi_battery *battery)
1da177e4 419{
4be44fcd
LB		 420 int result = 0;
421 acpi_status status = 0;
422 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4 423
b6ce4083
VL		 424 if (!acpi_battery_present(battery))
425 return 0;
1da177e4 426
f1d4661a
AS		 427 if (battery->update_time &&
428 time_before(jiffies, battery->update_time +
429 msecs_to_jiffies(cache_time)))
430 return 0;
431
038fdea2 432 mutex_lock(&battery->lock);
f1d4661a 433 status = acpi_evaluate_object(battery->device->handle, "_BST",
038fdea2
AS		 434 NULL, &buffer);
435 mutex_unlock(&battery->lock);
5b31d895 436
1da177e4 437 if (ACPI_FAILURE(status)) {
a6fc6720 438 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
d550d98d 439 return -ENODEV;
1da177e4 440 }
aa650bbd 441
038fdea2
AS		 442 result = extract_package(battery, buffer.pointer,
443 state_offsets, ARRAY_SIZE(state_offsets));
f1d4661a 444 battery->update_time = jiffies;
78490d82 445 kfree(buffer.pointer);
bc76f90b 446
7b3bcc4a 447 if (test_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags) &&
bc76f90b
HM		 448 battery->rate_now != -1)
449 battery->rate_now = abs((s16)battery->rate_now);
450
b6ce4083
VL		 451 return result;
452}
1da177e4 453
aa650bbd 454static int acpi_battery_set_alarm(struct acpi_battery *battery)
1da177e4 455{
4be44fcd 456 acpi_status status = 0;
aa650bbd 457 union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER };
4be44fcd 458 struct acpi_object_list arg_list = { 1, &arg0 };
1da177e4 459
c67fcd67 460 if (!acpi_battery_present(battery) ||
7b3bcc4a 461 !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags))
d550d98d 462 return -ENODEV;
1da177e4 463
aa650bbd 464 arg0.integer.value = battery->alarm;
1da177e4 465
038fdea2 466 mutex_lock(&battery->lock);
f1d4661a
AS		 467 status = acpi_evaluate_object(battery->device->handle, "_BTP",
468 &arg_list, NULL);
038fdea2 469 mutex_unlock(&battery->lock);
aa650bbd 470
1da177e4 471 if (ACPI_FAILURE(status))
d550d98d 472 return -ENODEV;
1da177e4 473
aa650bbd 474 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
d550d98d 475 return 0;
1da177e4
LT		 476}
477
b6ce4083 478static int acpi_battery_init_alarm(struct acpi_battery *battery)
1da177e4 479{
4be44fcd
LB		 480 acpi_status status = AE_OK;
481 acpi_handle handle = NULL;
4be44fcd 482
b6ce4083 483 /* See if alarms are supported, and if so, set default */
f1d4661a
AS		 484 status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
485 if (ACPI_FAILURE(status)) {
7b3bcc4a 486 clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
f1d4661a 487 return 0;
b6ce4083 488 }
7b3bcc4a 489 set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
f1d4661a
AS		 490 if (!battery->alarm)
491 battery->alarm = battery->design_capacity_warning;
aa650bbd 492 return acpi_battery_set_alarm(battery);
b6ce4083 493}
1da177e4 494
97749cd9 495#ifdef CONFIG_ACPI_SYSFS_POWER
508df92d
AB		 496static ssize_t acpi_battery_alarm_show(struct device *dev,
497 struct device_attribute *attr,
498 char *buf)
499{
500 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
501 return sprintf(buf, "%d\n", battery->alarm * 1000);
502}
503
504static ssize_t acpi_battery_alarm_store(struct device *dev,
505 struct device_attribute *attr,
506 const char *buf, size_t count)
507{
508 unsigned long x;
509 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
510 if (sscanf(buf, "%ld\n", &x) == 1)
511 battery->alarm = x/1000;
512 if (acpi_battery_present(battery))
513 acpi_battery_set_alarm(battery);
514 return count;
515}
516
517static struct device_attribute alarm_attr = {
01e8ef11 518 .attr = {.name = "alarm", .mode = 0644},
508df92d
AB		 519 .show = acpi_battery_alarm_show,
520 .store = acpi_battery_alarm_store,
521};
522
523static int sysfs_add_battery(struct acpi_battery *battery)
524{
525 int result;
526
508df92d
AB		 527 if (battery->power_unit) {
528 battery->bat.properties = charge_battery_props;
529 battery->bat.num_properties =
530 ARRAY_SIZE(charge_battery_props);
531 } else {
532 battery->bat.properties = energy_battery_props;
533 battery->bat.num_properties =
534 ARRAY_SIZE(energy_battery_props);
535 }
536
537 battery->bat.name = acpi_device_bid(battery->device);
538 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
539 battery->bat.get_property = acpi_battery_get_property;
540
541 result = power_supply_register(&battery->device->dev, &battery->bat);
542 if (result)
543 return result;
544 return device_create_file(battery->bat.dev, &alarm_attr);
545}
546
547static void sysfs_remove_battery(struct acpi_battery *battery)
548{
549 if (!battery->bat.dev)
550 return;
551 device_remove_file(battery->bat.dev, &alarm_attr);
552 power_supply_unregister(&battery->bat);
9104476e 553 battery->bat.dev = NULL;
508df92d 554}
97749cd9 555#endif
508df92d 556
bc76f90b
HM		 557static void acpi_battery_quirks(struct acpi_battery *battery)
558{
bc76f90b 559 if (dmi_name_in_vendors("Acer") && battery->power_unit) {
7b3bcc4a 560 set_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags);
bc76f90b
HM		 561 }
562}
563
f1d4661a 564static int acpi_battery_update(struct acpi_battery *battery)
b6ce4083 565{
50b17851 566 int result, old_present = acpi_battery_present(battery);
97749cd9 567 result = acpi_battery_get_status(battery);
508df92d 568 if (result)
b6ce4083 569 return result;
508df92d 570 if (!acpi_battery_present(battery)) {
e363a755 571#ifdef CONFIG_ACPI_SYSFS_POWER
508df92d 572 sysfs_remove_battery(battery);
e363a755 573#endif
97749cd9 574 battery->update_time = 0;
508df92d 575 return 0;
b6ce4083 576 }
50b17851
AS		 577 if (!battery->update_time ||
578 old_present != acpi_battery_present(battery)) {
97749cd9
AS		 579 result = acpi_battery_get_info(battery);
580 if (result)
581 return result;
bc76f90b 582 acpi_battery_quirks(battery);
97749cd9
AS		 583 acpi_battery_init_alarm(battery);
584 }
585#ifdef CONFIG_ACPI_SYSFS_POWER
508df92d
AB		 586 if (!battery->bat.dev)
587 sysfs_add_battery(battery);
97749cd9 588#endif
f1d4661a 589 return acpi_battery_get_state(battery);
4bd35cdb
VL		 590}
591
1da177e4
LT		 592/* --------------------------------------------------------------------------
593 FS Interface (/proc)
594 -------------------------------------------------------------------------- */
595
fdcedbba 596#ifdef CONFIG_ACPI_PROCFS_POWER
4be44fcd 597static struct proc_dir_entry *acpi_battery_dir;
b6ce4083 598
78490d82 599static int acpi_battery_print_info(struct seq_file *seq, int result)
1da177e4 600{
50dd0969 601 struct acpi_battery *battery = seq->private;
1da177e4 602
b6ce4083 603 if (result)
1da177e4
LT		 604 goto end;
605
aa650bbd
AS		 606 seq_printf(seq, "present: %s\n",
607 acpi_battery_present(battery)?"yes":"no");
608 if (!acpi_battery_present(battery))
1da177e4 609 goto end;
038fdea2 610 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 611 seq_printf(seq, "design capacity: unknown\n");
612 else
613 seq_printf(seq, "design capacity: %d %sh\n",
aa650bbd
AS		 614 battery->design_capacity,
615 acpi_battery_units(battery));
1da177e4 616
d7380965 617 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 618 seq_printf(seq, "last full capacity: unknown\n");
619 else
620 seq_printf(seq, "last full capacity: %d %sh\n",
d7380965 621 battery->full_charge_capacity,
aa650bbd
AS		 622 acpi_battery_units(battery));
623
624 seq_printf(seq, "battery technology: %srechargeable\n",
625 (!battery->technology)?"non-":"");
1da177e4 626
038fdea2 627 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 628 seq_printf(seq, "design voltage: unknown\n");
629 else
630 seq_printf(seq, "design voltage: %d mV\n",
aa650bbd 631 battery->design_voltage);
1da177e4 632 seq_printf(seq, "design capacity warning: %d %sh\n",
aa650bbd
AS		 633 battery->design_capacity_warning,
634 acpi_battery_units(battery));
1da177e4 635 seq_printf(seq, "design capacity low: %d %sh\n",
aa650bbd
AS		 636 battery->design_capacity_low,
637 acpi_battery_units(battery));
c67fcd67 638 seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
1da177e4 639 seq_printf(seq, "capacity granularity 1: %d %sh\n",
aa650bbd
AS		 640 battery->capacity_granularity_1,
641 acpi_battery_units(battery));
1da177e4 642 seq_printf(seq, "capacity granularity 2: %d %sh\n",
aa650bbd
AS		 643 battery->capacity_granularity_2,
644 acpi_battery_units(battery));
038fdea2
AS		 645 seq_printf(seq, "model number: %s\n", battery->model_number);
646 seq_printf(seq, "serial number: %s\n", battery->serial_number);
647 seq_printf(seq, "battery type: %s\n", battery->type);
648 seq_printf(seq, "OEM info: %s\n", battery->oem_info);
4be44fcd 649 end:
b6ce4083
VL		 650 if (result)
651 seq_printf(seq, "ERROR: Unable to read battery info\n");
b6ce4083
VL		 652 return result;
653}
654
78490d82 655static int acpi_battery_print_state(struct seq_file *seq, int result)
1da177e4 656{
50dd0969 657 struct acpi_battery *battery = seq->private;
1da177e4 658
b6ce4083 659 if (result)
1da177e4
LT		 660 goto end;
661
aa650bbd
AS		 662 seq_printf(seq, "present: %s\n",
663 acpi_battery_present(battery)?"yes":"no");
664 if (!acpi_battery_present(battery))
1da177e4 665 goto end;
b6ce4083 666
aa650bbd
AS		 667 seq_printf(seq, "capacity state: %s\n",
668 (battery->state & 0x04)?"critical":"ok");
669 if ((battery->state & 0x01) && (battery->state & 0x02))
4be44fcd
LB		 670 seq_printf(seq,
671 "charging state: charging/discharging\n");
aa650bbd 672 else if (battery->state & 0x01)
1da177e4 673 seq_printf(seq, "charging state: discharging\n");
038fdea2 674 else if (battery->state & 0x02)
1da177e4 675 seq_printf(seq, "charging state: charging\n");
aa650bbd 676 else
1da177e4 677 seq_printf(seq, "charging state: charged\n");
1da177e4 678
7faa144a 679 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 680 seq_printf(seq, "present rate: unknown\n");
681 else
682 seq_printf(seq, "present rate: %d %s\n",
7faa144a 683 battery->rate_now, acpi_battery_units(battery));
1da177e4 684
d7380965 685 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 686 seq_printf(seq, "remaining capacity: unknown\n");
687 else
688 seq_printf(seq, "remaining capacity: %d %sh\n",
d7380965
AS		 689 battery->capacity_now, acpi_battery_units(battery));
690 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 691 seq_printf(seq, "present voltage: unknown\n");
692 else
693 seq_printf(seq, "present voltage: %d mV\n",
d7380965 694 battery->voltage_now);
4be44fcd 695 end:
aa650bbd 696 if (result)
b6ce4083 697 seq_printf(seq, "ERROR: Unable to read battery state\n");
b6ce4083
VL		 698
699 return result;
700}
701
78490d82 702static int acpi_battery_print_alarm(struct seq_file *seq, int result)
1da177e4 703{
50dd0969 704 struct acpi_battery *battery = seq->private;
1da177e4 705
b6ce4083 706 if (result)
1da177e4
LT		 707 goto end;
708
b6ce4083 709 if (!acpi_battery_present(battery)) {
1da177e4
LT		 710 seq_printf(seq, "present: no\n");
711 goto end;
712 }
1da177e4
LT		 713 seq_printf(seq, "alarm: ");
714 if (!battery->alarm)
715 seq_printf(seq, "unsupported\n");
716 else
aa650bbd
AS		 717 seq_printf(seq, "%u %sh\n", battery->alarm,
718 acpi_battery_units(battery));
4be44fcd 719 end:
b6ce4083
VL		 720 if (result)
721 seq_printf(seq, "ERROR: Unable to read battery alarm\n");
b6ce4083
VL		 722 return result;
723}
724
f1d4661a
AS		 725static ssize_t acpi_battery_write_alarm(struct file *file,
726 const char __user * buffer,
727 size_t count, loff_t * ppos)
1da177e4 728{
4be44fcd
LB		 729 int result = 0;
730 char alarm_string[12] = { '\0' };
50dd0969
JE		 731 struct seq_file *m = file->private_data;
732 struct acpi_battery *battery = m->private;
1da177e4 733
1da177e4 734 if (!battery || (count > sizeof(alarm_string) - 1))
d550d98d 735 return -EINVAL;
b6ce4083
VL		 736 if (!acpi_battery_present(battery)) {
737 result = -ENODEV;
738 goto end;
739 }
b6ce4083
VL		 740 if (copy_from_user(alarm_string, buffer, count)) {
741 result = -EFAULT;
742 goto end;
743 }
1da177e4 744 alarm_string[count] = '\0';
f1d4661a 745 battery->alarm = simple_strtol(alarm_string, NULL, 0);
aa650bbd 746 result = acpi_battery_set_alarm(battery);
b6ce4083 747 end:
b6ce4083 748 if (!result)
f1d4661a 749 return count;
78490d82
AS		 750 return result;
751}
752
753typedef int(*print_func)(struct seq_file *seq, int result);
aa650bbd
AS		 754
755static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
756 acpi_battery_print_info,
757 acpi_battery_print_state,
758 acpi_battery_print_alarm,
78490d82 759};
b6ce4083 760
78490d82
AS		 761static int acpi_battery_read(int fid, struct seq_file *seq)
762{
763 struct acpi_battery *battery = seq->private;
f1d4661a 764 int result = acpi_battery_update(battery);
aa650bbd 765 return acpi_print_funcs[fid](seq, result);
78490d82
AS		 766}
767
aa650bbd
AS		 768#define DECLARE_FILE_FUNCTIONS(_name) \
769static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
770{ \
771 return acpi_battery_read(_name##_tag, seq); \
772} \
773static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
774{ \
775 return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
78490d82
AS		 776}
777
aa650bbd
AS		 778DECLARE_FILE_FUNCTIONS(info);
779DECLARE_FILE_FUNCTIONS(state);
780DECLARE_FILE_FUNCTIONS(alarm);
781
782#undef DECLARE_FILE_FUNCTIONS
783
784#define FILE_DESCRIPTION_RO(_name) \
785 { \
786 .name = __stringify(_name), \
787 .mode = S_IRUGO, \
788 .ops = { \
789 .open = acpi_battery_##_name##_open_fs, \
790 .read = seq_read, \
791 .llseek = seq_lseek, \
792 .release = single_release, \
793 .owner = THIS_MODULE, \
794 }, \
795 }
78490d82 796
aa650bbd
AS		 797#define FILE_DESCRIPTION_RW(_name) \
798 { \
799 .name = __stringify(_name), \
800 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
801 .ops = { \
802 .open = acpi_battery_##_name##_open_fs, \
803 .read = seq_read, \
804 .llseek = seq_lseek, \
805 .write = acpi_battery_write_##_name, \
806 .release = single_release, \
807 .owner = THIS_MODULE, \
808 }, \
809 }
1da177e4 810
78490d82
AS		 811static struct battery_file {
812 struct file_operations ops;
813 mode_t mode;
070d8eb1 814 const char *name;
78490d82 815} acpi_battery_file[] = {
aa650bbd
AS		 816 FILE_DESCRIPTION_RO(info),
817 FILE_DESCRIPTION_RO(state),
818 FILE_DESCRIPTION_RW(alarm),
1da177e4
LT		 819};
820
aa650bbd
AS		 821#undef FILE_DESCRIPTION_RO
822#undef FILE_DESCRIPTION_RW
823
4be44fcd 824static int acpi_battery_add_fs(struct acpi_device *device)
1da177e4 825{
4be44fcd 826 struct proc_dir_entry *entry = NULL;
78490d82 827 int i;
1da177e4 828
1da177e4
LT		 829 if (!acpi_device_dir(device)) {
830 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd 831 acpi_battery_dir);
1da177e4 832 if (!acpi_device_dir(device))
d550d98d 833 return -ENODEV;
1da177e4
LT		 834 }
835
78490d82 836 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
cf7acfab
DL		 837 entry = proc_create_data(acpi_battery_file[i].name,
838 acpi_battery_file[i].mode,
839 acpi_device_dir(device),
840 &acpi_battery_file[i].ops,
841 acpi_driver_data(device));
78490d82
AS		 842 if (!entry)
843 return -ENODEV;
1da177e4 844 }
d550d98d 845 return 0;
1da177e4
LT		 846}
847
aa650bbd 848static void acpi_battery_remove_fs(struct acpi_device *device)
1da177e4 849{
78490d82 850 int i;
aa650bbd
AS		 851 if (!acpi_device_dir(device))
852 return;
853 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
854 remove_proc_entry(acpi_battery_file[i].name,
1da177e4 855 acpi_device_dir(device));
1da177e4 856
aa650bbd
AS		 857 remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
858 acpi_device_dir(device) = NULL;
1da177e4
LT		 859}
860
d7380965 861#endif
3e58ea0d 862
1da177e4
LT		 863/* --------------------------------------------------------------------------
864 Driver Interface
865 -------------------------------------------------------------------------- */
866
d9406691 867static void acpi_battery_notify(struct acpi_device *device, u32 event)
1da177e4 868{
d9406691 869 struct acpi_battery *battery = acpi_driver_data(device);
153e500f
ZR		 870#ifdef CONFIG_ACPI_SYSFS_POWER
871 struct device *old;
872#endif
d9406691 873
1da177e4 874 if (!battery)
d550d98d 875 return;
153e500f
ZR		 876#ifdef CONFIG_ACPI_SYSFS_POWER
877 old = battery->bat.dev;
878#endif
f1d4661a
AS		 879 acpi_battery_update(battery);
880 acpi_bus_generate_proc_event(device, event,
881 acpi_battery_present(battery));
882 acpi_bus_generate_netlink_event(device->pnp.device_class,
0794469d 883 dev_name(&device->dev), event,
9ea7d575 884 acpi_battery_present(battery));
97749cd9 885#ifdef CONFIG_ACPI_SYSFS_POWER
2345baf4 886 /* acpi_battery_update could remove power_supply object */
153e500f 887 if (old && battery->bat.dev)
f79e1cec 888 power_supply_changed(&battery->bat);
97749cd9 889#endif
1da177e4
LT		 890}
891
4be44fcd 892static int acpi_battery_add(struct acpi_device *device)
1da177e4 893{
4be44fcd 894 int result = 0;
4be44fcd 895 struct acpi_battery *battery = NULL;
c67fcd67 896 acpi_handle handle;
1da177e4 897 if (!device)
d550d98d 898 return -EINVAL;
36bcbec7 899 battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
1da177e4 900 if (!battery)
d550d98d 901 return -ENOMEM;
145def84 902 battery->device = device;
1da177e4
LT		 903 strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
904 strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
db89b4f0 905 device->driver_data = battery;
038fdea2 906 mutex_init(&battery->lock);
c67fcd67
AS		 907 if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle,
908 "_BIX", &handle)))
909 set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
f1d4661a 910 acpi_battery_update(battery);
fdcedbba 911#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 912 result = acpi_battery_add_fs(device);
d7380965 913#endif
586caae3
LB		 914 if (!result) {
915 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
916 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
917 device->status.battery_present ? "present" : "absent");
918 } else {
fdcedbba 919#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 920 acpi_battery_remove_fs(device);
d7380965 921#endif
1da177e4
LT		 922 kfree(battery);
923 }
d550d98d 924 return result;
1da177e4
LT		 925}
926
4be44fcd 927static int acpi_battery_remove(struct acpi_device *device, int type)
1da177e4 928{
4be44fcd 929 struct acpi_battery *battery = NULL;
1da177e4 930
1da177e4 931 if (!device || !acpi_driver_data(device))
d550d98d 932 return -EINVAL;
50dd0969 933 battery = acpi_driver_data(device);
fdcedbba 934#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 935 acpi_battery_remove_fs(device);
d7380965 936#endif
97749cd9 937#ifdef CONFIG_ACPI_SYSFS_POWER
508df92d 938 sysfs_remove_battery(battery);
97749cd9 939#endif
038fdea2 940 mutex_destroy(&battery->lock);
1da177e4 941 kfree(battery);
d550d98d 942 return 0;
1da177e4
LT		 943}
944
34c4415a 945/* this is needed to learn about changes made in suspended state */
5d9464a4 946static int acpi_battery_resume(struct acpi_device *device)
34c4415a
JK		 947{
948 struct acpi_battery *battery;
34c4415a
JK		 949 if (!device)
950 return -EINVAL;
f1d4661a
AS		 951 battery = acpi_driver_data(device);
952 battery->update_time = 0;
508df92d 953 acpi_battery_update(battery);
b6ce4083 954 return 0;
34c4415a
JK		 955}
956
aa650bbd
AS		 957static struct acpi_driver acpi_battery_driver = {
958 .name = "battery",
959 .class = ACPI_BATTERY_CLASS,
960 .ids = battery_device_ids,
d9406691 961 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
aa650bbd
AS		 962 .ops = {
963 .add = acpi_battery_add,
964 .resume = acpi_battery_resume,
965 .remove = acpi_battery_remove,
d9406691 966 .notify = acpi_battery_notify,
aa650bbd
AS		 967 },
968};
969
b0cbc861 970static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
1da177e4 971{
4d8316d5 972 if (acpi_disabled)
0f66af53 973 return;
fdcedbba 974#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 975 acpi_battery_dir = acpi_lock_battery_dir();
1da177e4 976 if (!acpi_battery_dir)
0f66af53 977 return;
d7380965 978#endif
aa650bbd 979 if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
fdcedbba 980#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 981 acpi_unlock_battery_dir(acpi_battery_dir);
d7380965 982#endif
0f66af53 983 return;
1da177e4 984 }
0f66af53
AV		 985 return;
986}
987
988static int __init acpi_battery_init(void)
989{
990 async_schedule(acpi_battery_init_async, NULL);
d550d98d 991 return 0;
1da177e4
LT		 992}
993
4be44fcd 994static void __exit acpi_battery_exit(void)
1da177e4 995{
1da177e4 996 acpi_bus_unregister_driver(&acpi_battery_driver);
fdcedbba 997#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 998 acpi_unlock_battery_dir(acpi_battery_dir);
d7380965 999#endif
1da177e4
LT		 1000}
1001
1da177e4
LT		 1002module_init(acpi_battery_init);
1003module_exit(acpi_battery_exit);
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