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ACPI battery: don't invoke power_supply_changed twice when battery is hot-added
[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,
276 POWER_SUPPLY_PROP_CURRENT_NOW,
7faa144a 277 POWER_SUPPLY_PROP_POWER_NOW,
d7380965
AS		 278 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
279 POWER_SUPPLY_PROP_ENERGY_FULL,
280 POWER_SUPPLY_PROP_ENERGY_NOW,
281 POWER_SUPPLY_PROP_MODEL_NAME,
282 POWER_SUPPLY_PROP_MANUFACTURER,
7c2670bb 283 POWER_SUPPLY_PROP_SERIAL_NUMBER,
d7380965 284};
97749cd9 285#endif
d7380965 286
fdcedbba 287#ifdef CONFIG_ACPI_PROCFS_POWER
f1d4661a 288inline char *acpi_battery_units(struct acpi_battery *battery)
78490d82 289{
f1d4661a 290 return (battery->power_unit)?"mA":"mW";
b6ce4083 291}
d7380965 292#endif
b6ce4083 293
78490d82
AS		 294/* --------------------------------------------------------------------------
295 Battery Management
296 -------------------------------------------------------------------------- */
038fdea2
AS		 297struct acpi_offsets {
298 size_t offset; /* offset inside struct acpi_sbs_battery */
299 u8 mode; /* int or string? */
300};
b6ce4083 301
038fdea2
AS		 302static struct acpi_offsets state_offsets[] = {
303 {offsetof(struct acpi_battery, state), 0},
7faa144a 304 {offsetof(struct acpi_battery, rate_now), 0},
d7380965
AS		 305 {offsetof(struct acpi_battery, capacity_now), 0},
306 {offsetof(struct acpi_battery, voltage_now), 0},
038fdea2 307};
b6ce4083 308
038fdea2
AS		 309static struct acpi_offsets info_offsets[] = {
310 {offsetof(struct acpi_battery, power_unit), 0},
311 {offsetof(struct acpi_battery, design_capacity), 0},
d7380965 312 {offsetof(struct acpi_battery, full_charge_capacity), 0},
038fdea2
AS		 313 {offsetof(struct acpi_battery, technology), 0},
314 {offsetof(struct acpi_battery, design_voltage), 0},
315 {offsetof(struct acpi_battery, design_capacity_warning), 0},
316 {offsetof(struct acpi_battery, design_capacity_low), 0},
317 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
318 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
319 {offsetof(struct acpi_battery, model_number), 1},
320 {offsetof(struct acpi_battery, serial_number), 1},
321 {offsetof(struct acpi_battery, type), 1},
322 {offsetof(struct acpi_battery, oem_info), 1},
323};
b6ce4083 324
c67fcd67
AS		 325static struct acpi_offsets extended_info_offsets[] = {
326 {offsetof(struct acpi_battery, power_unit), 0},
327 {offsetof(struct acpi_battery, design_capacity), 0},
328 {offsetof(struct acpi_battery, full_charge_capacity), 0},
329 {offsetof(struct acpi_battery, technology), 0},
330 {offsetof(struct acpi_battery, design_voltage), 0},
331 {offsetof(struct acpi_battery, design_capacity_warning), 0},
332 {offsetof(struct acpi_battery, design_capacity_low), 0},
333 {offsetof(struct acpi_battery, cycle_count), 0},
334 {offsetof(struct acpi_battery, measurement_accuracy), 0},
335 {offsetof(struct acpi_battery, max_sampling_time), 0},
336 {offsetof(struct acpi_battery, min_sampling_time), 0},
337 {offsetof(struct acpi_battery, max_averaging_interval), 0},
338 {offsetof(struct acpi_battery, min_averaging_interval), 0},
339 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
340 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
341 {offsetof(struct acpi_battery, model_number), 1},
342 {offsetof(struct acpi_battery, serial_number), 1},
343 {offsetof(struct acpi_battery, type), 1},
344 {offsetof(struct acpi_battery, oem_info), 1},
345};
346
038fdea2
AS		 347static int extract_package(struct acpi_battery *battery,
348 union acpi_object *package,
349 struct acpi_offsets *offsets, int num)
350{
106449e8 351 int i;
038fdea2
AS		 352 union acpi_object *element;
353 if (package->type != ACPI_TYPE_PACKAGE)
354 return -EFAULT;
355 for (i = 0; i < num; ++i) {
356 if (package->package.count <= i)
357 return -EFAULT;
358 element = &package->package.elements[i];
359 if (offsets[i].mode) {
106449e8
AS		 360 u8 *ptr = (u8 *)battery + offsets[i].offset;
361 if (element->type == ACPI_TYPE_STRING ||
362 element->type == ACPI_TYPE_BUFFER)
363 strncpy(ptr, element->string.pointer, 32);
364 else if (element->type == ACPI_TYPE_INTEGER) {
365 strncpy(ptr, (u8 *)&element->integer.value,
439913ff
LM		 366 sizeof(u64));
367 ptr[sizeof(u64)] = 0;
b8a1bdb1
AS		 368 } else
369 *ptr = 0; /* don't have value */
038fdea2 370 } else {
b8a1bdb1
AS		 371 int *x = (int *)((u8 *)battery + offsets[i].offset);
372 *x = (element->type == ACPI_TYPE_INTEGER) ?
373 element->integer.value : -1;
038fdea2 374 }
b6ce4083 375 }
b6ce4083
VL		 376 return 0;
377}
378
379static int acpi_battery_get_status(struct acpi_battery *battery)
380{
aa650bbd 381 if (acpi_bus_get_status(battery->device)) {
b6ce4083
VL		 382 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
383 return -ENODEV;
384 }
aa650bbd 385 return 0;
b6ce4083
VL		 386}
387
388static int acpi_battery_get_info(struct acpi_battery *battery)
1da177e4 389{
aa650bbd 390 int result = -EFAULT;
4be44fcd 391 acpi_status status = 0;
c67fcd67
AS		 392 char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)?
393 "_BIX" : "_BIF";
394
4be44fcd 395 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4 396
b6ce4083
VL		 397 if (!acpi_battery_present(battery))
398 return 0;
038fdea2 399 mutex_lock(&battery->lock);
c67fcd67
AS		 400 status = acpi_evaluate_object(battery->device->handle, name,
401 NULL, &buffer);
038fdea2 402 mutex_unlock(&battery->lock);
aa650bbd 403
1da177e4 404 if (ACPI_FAILURE(status)) {
c67fcd67 405 ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name));
d550d98d 406 return -ENODEV;
1da177e4 407 }
c67fcd67
AS		 408 if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags))
409 result = extract_package(battery, buffer.pointer,
410 extended_info_offsets,
411 ARRAY_SIZE(extended_info_offsets));
412 else
413 result = extract_package(battery, buffer.pointer,
414 info_offsets, ARRAY_SIZE(info_offsets));
78490d82 415 kfree(buffer.pointer);
d550d98d 416 return result;
1da177e4
LT		 417}
418
b6ce4083 419static int acpi_battery_get_state(struct acpi_battery *battery)
1da177e4 420{
4be44fcd
LB		 421 int result = 0;
422 acpi_status status = 0;
423 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4 424
b6ce4083
VL		 425 if (!acpi_battery_present(battery))
426 return 0;
1da177e4 427
f1d4661a
AS		 428 if (battery->update_time &&
429 time_before(jiffies, battery->update_time +
430 msecs_to_jiffies(cache_time)))
431 return 0;
432
038fdea2 433 mutex_lock(&battery->lock);
f1d4661a 434 status = acpi_evaluate_object(battery->device->handle, "_BST",
038fdea2
AS		 435 NULL, &buffer);
436 mutex_unlock(&battery->lock);
5b31d895 437
1da177e4 438 if (ACPI_FAILURE(status)) {
a6fc6720 439 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
d550d98d 440 return -ENODEV;
1da177e4 441 }
aa650bbd 442
038fdea2
AS		 443 result = extract_package(battery, buffer.pointer,
444 state_offsets, ARRAY_SIZE(state_offsets));
f1d4661a 445 battery->update_time = jiffies;
78490d82 446 kfree(buffer.pointer);
bc76f90b 447
7b3bcc4a 448 if (test_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags) &&
bc76f90b
HM		 449 battery->rate_now != -1)
450 battery->rate_now = abs((s16)battery->rate_now);
451
b6ce4083
VL		 452 return result;
453}
1da177e4 454
aa650bbd 455static int acpi_battery_set_alarm(struct acpi_battery *battery)
1da177e4 456{
4be44fcd 457 acpi_status status = 0;
aa650bbd 458 union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER };
4be44fcd 459 struct acpi_object_list arg_list = { 1, &arg0 };
1da177e4 460
c67fcd67 461 if (!acpi_battery_present(battery) ||
7b3bcc4a 462 !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags))
d550d98d 463 return -ENODEV;
1da177e4 464
aa650bbd 465 arg0.integer.value = battery->alarm;
1da177e4 466
038fdea2 467 mutex_lock(&battery->lock);
f1d4661a
AS		 468 status = acpi_evaluate_object(battery->device->handle, "_BTP",
469 &arg_list, NULL);
038fdea2 470 mutex_unlock(&battery->lock);
aa650bbd 471
1da177e4 472 if (ACPI_FAILURE(status))
d550d98d 473 return -ENODEV;
1da177e4 474
aa650bbd 475 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
d550d98d 476 return 0;
1da177e4
LT		 477}
478
b6ce4083 479static int acpi_battery_init_alarm(struct acpi_battery *battery)
1da177e4 480{
4be44fcd
LB		 481 acpi_status status = AE_OK;
482 acpi_handle handle = NULL;
4be44fcd 483
b6ce4083 484 /* See if alarms are supported, and if so, set default */
f1d4661a
AS		 485 status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
486 if (ACPI_FAILURE(status)) {
7b3bcc4a 487 clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
f1d4661a 488 return 0;
b6ce4083 489 }
7b3bcc4a 490 set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
f1d4661a
AS		 491 if (!battery->alarm)
492 battery->alarm = battery->design_capacity_warning;
aa650bbd 493 return acpi_battery_set_alarm(battery);
b6ce4083 494}
1da177e4 495
97749cd9 496#ifdef CONFIG_ACPI_SYSFS_POWER
508df92d
AB		 497static ssize_t acpi_battery_alarm_show(struct device *dev,
498 struct device_attribute *attr,
499 char *buf)
500{
501 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
502 return sprintf(buf, "%d\n", battery->alarm * 1000);
503}
504
505static ssize_t acpi_battery_alarm_store(struct device *dev,
506 struct device_attribute *attr,
507 const char *buf, size_t count)
508{
509 unsigned long x;
510 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
511 if (sscanf(buf, "%ld\n", &x) == 1)
512 battery->alarm = x/1000;
513 if (acpi_battery_present(battery))
514 acpi_battery_set_alarm(battery);
515 return count;
516}
517
518static struct device_attribute alarm_attr = {
01e8ef11 519 .attr = {.name = "alarm", .mode = 0644},
508df92d
AB		 520 .show = acpi_battery_alarm_show,
521 .store = acpi_battery_alarm_store,
522};
523
524static int sysfs_add_battery(struct acpi_battery *battery)
525{
526 int result;
527
508df92d
AB		 528 if (battery->power_unit) {
529 battery->bat.properties = charge_battery_props;
530 battery->bat.num_properties =
531 ARRAY_SIZE(charge_battery_props);
532 } else {
533 battery->bat.properties = energy_battery_props;
534 battery->bat.num_properties =
535 ARRAY_SIZE(energy_battery_props);
536 }
537
538 battery->bat.name = acpi_device_bid(battery->device);
539 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
540 battery->bat.get_property = acpi_battery_get_property;
541
542 result = power_supply_register(&battery->device->dev, &battery->bat);
543 if (result)
544 return result;
545 return device_create_file(battery->bat.dev, &alarm_attr);
546}
547
548static void sysfs_remove_battery(struct acpi_battery *battery)
549{
550 if (!battery->bat.dev)
551 return;
552 device_remove_file(battery->bat.dev, &alarm_attr);
553 power_supply_unregister(&battery->bat);
9104476e 554 battery->bat.dev = NULL;
508df92d 555}
97749cd9 556#endif
508df92d 557
bc76f90b
HM		 558static void acpi_battery_quirks(struct acpi_battery *battery)
559{
bc76f90b 560 if (dmi_name_in_vendors("Acer") && battery->power_unit) {
7b3bcc4a 561 set_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags);
bc76f90b
HM		 562 }
563}
564
f1d4661a 565static int acpi_battery_update(struct acpi_battery *battery)
b6ce4083 566{
50b17851 567 int result, old_present = acpi_battery_present(battery);
97749cd9 568 result = acpi_battery_get_status(battery);
508df92d 569 if (result)
b6ce4083 570 return result;
508df92d 571 if (!acpi_battery_present(battery)) {
e363a755 572#ifdef CONFIG_ACPI_SYSFS_POWER
508df92d 573 sysfs_remove_battery(battery);
e363a755 574#endif
97749cd9 575 battery->update_time = 0;
508df92d 576 return 0;
b6ce4083 577 }
50b17851
AS		 578 if (!battery->update_time ||
579 old_present != acpi_battery_present(battery)) {
97749cd9
AS		 580 result = acpi_battery_get_info(battery);
581 if (result)
582 return result;
bc76f90b 583 acpi_battery_quirks(battery);
97749cd9
AS		 584 acpi_battery_init_alarm(battery);
585 }
586#ifdef CONFIG_ACPI_SYSFS_POWER
508df92d
AB		 587 if (!battery->bat.dev)
588 sysfs_add_battery(battery);
97749cd9 589#endif
f1d4661a 590 return acpi_battery_get_state(battery);
4bd35cdb
VL		 591}
592
1da177e4
LT		 593/* --------------------------------------------------------------------------
594 FS Interface (/proc)
595 -------------------------------------------------------------------------- */
596
fdcedbba 597#ifdef CONFIG_ACPI_PROCFS_POWER
4be44fcd 598static struct proc_dir_entry *acpi_battery_dir;
b6ce4083 599
78490d82 600static int acpi_battery_print_info(struct seq_file *seq, int result)
1da177e4 601{
50dd0969 602 struct acpi_battery *battery = seq->private;
1da177e4 603
b6ce4083 604 if (result)
1da177e4
LT		 605 goto end;
606
aa650bbd
AS		 607 seq_printf(seq, "present: %s\n",
608 acpi_battery_present(battery)?"yes":"no");
609 if (!acpi_battery_present(battery))
1da177e4 610 goto end;
038fdea2 611 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 612 seq_printf(seq, "design capacity: unknown\n");
613 else
614 seq_printf(seq, "design capacity: %d %sh\n",
aa650bbd
AS		 615 battery->design_capacity,
616 acpi_battery_units(battery));
1da177e4 617
d7380965 618 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 619 seq_printf(seq, "last full capacity: unknown\n");
620 else
621 seq_printf(seq, "last full capacity: %d %sh\n",
d7380965 622 battery->full_charge_capacity,
aa650bbd
AS		 623 acpi_battery_units(battery));
624
625 seq_printf(seq, "battery technology: %srechargeable\n",
626 (!battery->technology)?"non-":"");
1da177e4 627
038fdea2 628 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 629 seq_printf(seq, "design voltage: unknown\n");
630 else
631 seq_printf(seq, "design voltage: %d mV\n",
aa650bbd 632 battery->design_voltage);
1da177e4 633 seq_printf(seq, "design capacity warning: %d %sh\n",
aa650bbd
AS		 634 battery->design_capacity_warning,
635 acpi_battery_units(battery));
1da177e4 636 seq_printf(seq, "design capacity low: %d %sh\n",
aa650bbd
AS		 637 battery->design_capacity_low,
638 acpi_battery_units(battery));
c67fcd67 639 seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
1da177e4 640 seq_printf(seq, "capacity granularity 1: %d %sh\n",
aa650bbd
AS		 641 battery->capacity_granularity_1,
642 acpi_battery_units(battery));
1da177e4 643 seq_printf(seq, "capacity granularity 2: %d %sh\n",
aa650bbd
AS		 644 battery->capacity_granularity_2,
645 acpi_battery_units(battery));
038fdea2
AS		 646 seq_printf(seq, "model number: %s\n", battery->model_number);
647 seq_printf(seq, "serial number: %s\n", battery->serial_number);
648 seq_printf(seq, "battery type: %s\n", battery->type);
649 seq_printf(seq, "OEM info: %s\n", battery->oem_info);
4be44fcd 650 end:
b6ce4083
VL		 651 if (result)
652 seq_printf(seq, "ERROR: Unable to read battery info\n");
b6ce4083
VL		 653 return result;
654}
655
78490d82 656static int acpi_battery_print_state(struct seq_file *seq, int result)
1da177e4 657{
50dd0969 658 struct acpi_battery *battery = seq->private;
1da177e4 659
b6ce4083 660 if (result)
1da177e4
LT		 661 goto end;
662
aa650bbd
AS		 663 seq_printf(seq, "present: %s\n",
664 acpi_battery_present(battery)?"yes":"no");
665 if (!acpi_battery_present(battery))
1da177e4 666 goto end;
b6ce4083 667
aa650bbd
AS		 668 seq_printf(seq, "capacity state: %s\n",
669 (battery->state & 0x04)?"critical":"ok");
670 if ((battery->state & 0x01) && (battery->state & 0x02))
4be44fcd
LB		 671 seq_printf(seq,
672 "charging state: charging/discharging\n");
aa650bbd 673 else if (battery->state & 0x01)
1da177e4 674 seq_printf(seq, "charging state: discharging\n");
038fdea2 675 else if (battery->state & 0x02)
1da177e4 676 seq_printf(seq, "charging state: charging\n");
aa650bbd 677 else
1da177e4 678 seq_printf(seq, "charging state: charged\n");
1da177e4 679
7faa144a 680 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 681 seq_printf(seq, "present rate: unknown\n");
682 else
683 seq_printf(seq, "present rate: %d %s\n",
7faa144a 684 battery->rate_now, acpi_battery_units(battery));
1da177e4 685
d7380965 686 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 687 seq_printf(seq, "remaining capacity: unknown\n");
688 else
689 seq_printf(seq, "remaining capacity: %d %sh\n",
d7380965
AS		 690 battery->capacity_now, acpi_battery_units(battery));
691 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 692 seq_printf(seq, "present voltage: unknown\n");
693 else
694 seq_printf(seq, "present voltage: %d mV\n",
d7380965 695 battery->voltage_now);
4be44fcd 696 end:
aa650bbd 697 if (result)
b6ce4083 698 seq_printf(seq, "ERROR: Unable to read battery state\n");
b6ce4083
VL		 699
700 return result;
701}
702
78490d82 703static int acpi_battery_print_alarm(struct seq_file *seq, int result)
1da177e4 704{
50dd0969 705 struct acpi_battery *battery = seq->private;
1da177e4 706
b6ce4083 707 if (result)
1da177e4
LT		 708 goto end;
709
b6ce4083 710 if (!acpi_battery_present(battery)) {
1da177e4
LT		 711 seq_printf(seq, "present: no\n");
712 goto end;
713 }
1da177e4
LT		 714 seq_printf(seq, "alarm: ");
715 if (!battery->alarm)
716 seq_printf(seq, "unsupported\n");
717 else
aa650bbd
AS		 718 seq_printf(seq, "%u %sh\n", battery->alarm,
719 acpi_battery_units(battery));
4be44fcd 720 end:
b6ce4083
VL		 721 if (result)
722 seq_printf(seq, "ERROR: Unable to read battery alarm\n");
b6ce4083
VL		 723 return result;
724}
725
f1d4661a
AS		 726static ssize_t acpi_battery_write_alarm(struct file *file,
727 const char __user * buffer,
728 size_t count, loff_t * ppos)
1da177e4 729{
4be44fcd
LB		 730 int result = 0;
731 char alarm_string[12] = { '\0' };
50dd0969
JE		 732 struct seq_file *m = file->private_data;
733 struct acpi_battery *battery = m->private;
1da177e4 734
1da177e4 735 if (!battery || (count > sizeof(alarm_string) - 1))
d550d98d 736 return -EINVAL;
b6ce4083
VL		 737 if (!acpi_battery_present(battery)) {
738 result = -ENODEV;
739 goto end;
740 }
b6ce4083
VL		 741 if (copy_from_user(alarm_string, buffer, count)) {
742 result = -EFAULT;
743 goto end;
744 }
1da177e4 745 alarm_string[count] = '\0';
f1d4661a 746 battery->alarm = simple_strtol(alarm_string, NULL, 0);
aa650bbd 747 result = acpi_battery_set_alarm(battery);
b6ce4083 748 end:
b6ce4083 749 if (!result)
f1d4661a 750 return count;
78490d82
AS		 751 return result;
752}
753
754typedef int(*print_func)(struct seq_file *seq, int result);
aa650bbd
AS		 755
756static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
757 acpi_battery_print_info,
758 acpi_battery_print_state,
759 acpi_battery_print_alarm,
78490d82 760};
b6ce4083 761
78490d82
AS		 762static int acpi_battery_read(int fid, struct seq_file *seq)
763{
764 struct acpi_battery *battery = seq->private;
f1d4661a 765 int result = acpi_battery_update(battery);
aa650bbd 766 return acpi_print_funcs[fid](seq, result);
78490d82
AS		 767}
768
aa650bbd
AS		 769#define DECLARE_FILE_FUNCTIONS(_name) \
770static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
771{ \
772 return acpi_battery_read(_name##_tag, seq); \
773} \
774static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
775{ \
776 return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
78490d82
AS		 777}
778
aa650bbd
AS		 779DECLARE_FILE_FUNCTIONS(info);
780DECLARE_FILE_FUNCTIONS(state);
781DECLARE_FILE_FUNCTIONS(alarm);
782
783#undef DECLARE_FILE_FUNCTIONS
784
785#define FILE_DESCRIPTION_RO(_name) \
786 { \
787 .name = __stringify(_name), \
788 .mode = S_IRUGO, \
789 .ops = { \
790 .open = acpi_battery_##_name##_open_fs, \
791 .read = seq_read, \
792 .llseek = seq_lseek, \
793 .release = single_release, \
794 .owner = THIS_MODULE, \
795 }, \
796 }
78490d82 797
aa650bbd
AS		 798#define FILE_DESCRIPTION_RW(_name) \
799 { \
800 .name = __stringify(_name), \
801 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
802 .ops = { \
803 .open = acpi_battery_##_name##_open_fs, \
804 .read = seq_read, \
805 .llseek = seq_lseek, \
806 .write = acpi_battery_write_##_name, \
807 .release = single_release, \
808 .owner = THIS_MODULE, \
809 }, \
810 }
1da177e4 811
78490d82
AS		 812static struct battery_file {
813 struct file_operations ops;
814 mode_t mode;
070d8eb1 815 const char *name;
78490d82 816} acpi_battery_file[] = {
aa650bbd
AS		 817 FILE_DESCRIPTION_RO(info),
818 FILE_DESCRIPTION_RO(state),
819 FILE_DESCRIPTION_RW(alarm),
1da177e4
LT		 820};
821
aa650bbd
AS		 822#undef FILE_DESCRIPTION_RO
823#undef FILE_DESCRIPTION_RW
824
4be44fcd 825static int acpi_battery_add_fs(struct acpi_device *device)
1da177e4 826{
4be44fcd 827 struct proc_dir_entry *entry = NULL;
78490d82 828 int i;
1da177e4 829
1da177e4
LT		 830 if (!acpi_device_dir(device)) {
831 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd 832 acpi_battery_dir);
1da177e4 833 if (!acpi_device_dir(device))
d550d98d 834 return -ENODEV;
1da177e4
LT		 835 }
836
78490d82 837 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
cf7acfab
DL		 838 entry = proc_create_data(acpi_battery_file[i].name,
839 acpi_battery_file[i].mode,
840 acpi_device_dir(device),
841 &acpi_battery_file[i].ops,
842 acpi_driver_data(device));
78490d82
AS		 843 if (!entry)
844 return -ENODEV;
1da177e4 845 }
d550d98d 846 return 0;
1da177e4
LT		 847}
848
aa650bbd 849static void acpi_battery_remove_fs(struct acpi_device *device)
1da177e4 850{
78490d82 851 int i;
aa650bbd
AS		 852 if (!acpi_device_dir(device))
853 return;
854 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
855 remove_proc_entry(acpi_battery_file[i].name,
1da177e4 856 acpi_device_dir(device));
1da177e4 857
aa650bbd
AS		 858 remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
859 acpi_device_dir(device) = NULL;
1da177e4
LT		 860}
861
d7380965 862#endif
3e58ea0d 863
1da177e4
LT		 864/* --------------------------------------------------------------------------
865 Driver Interface
866 -------------------------------------------------------------------------- */
867
d9406691 868static void acpi_battery_notify(struct acpi_device *device, u32 event)
1da177e4 869{
d9406691 870 struct acpi_battery *battery = acpi_driver_data(device);
153e500f
ZR		 871#ifdef CONFIG_ACPI_SYSFS_POWER
872 struct device *old;
873#endif
d9406691 874
1da177e4 875 if (!battery)
d550d98d 876 return;
153e500f
ZR		 877#ifdef CONFIG_ACPI_SYSFS_POWER
878 old = battery->bat.dev;
879#endif
f1d4661a
AS		 880 acpi_battery_update(battery);
881 acpi_bus_generate_proc_event(device, event,
882 acpi_battery_present(battery));
883 acpi_bus_generate_netlink_event(device->pnp.device_class,
0794469d 884 dev_name(&device->dev), event,
9ea7d575 885 acpi_battery_present(battery));
97749cd9 886#ifdef CONFIG_ACPI_SYSFS_POWER
2345baf4 887 /* acpi_battery_update could remove power_supply object */
153e500f 888 if (old && battery->bat.dev)
f79e1cec 889 power_supply_changed(&battery->bat);
97749cd9 890#endif
1da177e4
LT		 891}
892
4be44fcd 893static int acpi_battery_add(struct acpi_device *device)
1da177e4 894{
4be44fcd 895 int result = 0;
4be44fcd 896 struct acpi_battery *battery = NULL;
c67fcd67 897 acpi_handle handle;
1da177e4 898 if (!device)
d550d98d 899 return -EINVAL;
36bcbec7 900 battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
1da177e4 901 if (!battery)
d550d98d 902 return -ENOMEM;
145def84 903 battery->device = device;
1da177e4
LT		 904 strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
905 strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
db89b4f0 906 device->driver_data = battery;
038fdea2 907 mutex_init(&battery->lock);
c67fcd67
AS		 908 if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle,
909 "_BIX", &handle)))
910 set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
f1d4661a 911 acpi_battery_update(battery);
fdcedbba 912#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 913 result = acpi_battery_add_fs(device);
d7380965 914#endif
586caae3
LB		 915 if (!result) {
916 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
917 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
918 device->status.battery_present ? "present" : "absent");
919 } else {
fdcedbba 920#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 921 acpi_battery_remove_fs(device);
d7380965 922#endif
1da177e4
LT		 923 kfree(battery);
924 }
d550d98d 925 return result;
1da177e4
LT		 926}
927
4be44fcd 928static int acpi_battery_remove(struct acpi_device *device, int type)
1da177e4 929{
4be44fcd 930 struct acpi_battery *battery = NULL;
1da177e4 931
1da177e4 932 if (!device || !acpi_driver_data(device))
d550d98d 933 return -EINVAL;
50dd0969 934 battery = acpi_driver_data(device);
fdcedbba 935#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 936 acpi_battery_remove_fs(device);
d7380965 937#endif
97749cd9 938#ifdef CONFIG_ACPI_SYSFS_POWER
508df92d 939 sysfs_remove_battery(battery);
97749cd9 940#endif
038fdea2 941 mutex_destroy(&battery->lock);
1da177e4 942 kfree(battery);
d550d98d 943 return 0;
1da177e4
LT		 944}
945
34c4415a 946/* this is needed to learn about changes made in suspended state */
5d9464a4 947static int acpi_battery_resume(struct acpi_device *device)
34c4415a
JK		 948{
949 struct acpi_battery *battery;
34c4415a
JK		 950 if (!device)
951 return -EINVAL;
f1d4661a
AS		 952 battery = acpi_driver_data(device);
953 battery->update_time = 0;
508df92d 954 acpi_battery_update(battery);
b6ce4083 955 return 0;
34c4415a
JK		 956}
957
aa650bbd
AS		 958static struct acpi_driver acpi_battery_driver = {
959 .name = "battery",
960 .class = ACPI_BATTERY_CLASS,
961 .ids = battery_device_ids,
d9406691 962 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
aa650bbd
AS		 963 .ops = {
964 .add = acpi_battery_add,
965 .resume = acpi_battery_resume,
966 .remove = acpi_battery_remove,
d9406691 967 .notify = acpi_battery_notify,
aa650bbd
AS		 968 },
969};
970
b0cbc861 971static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
1da177e4 972{
4d8316d5 973 if (acpi_disabled)
0f66af53 974 return;
fdcedbba 975#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 976 acpi_battery_dir = acpi_lock_battery_dir();
1da177e4 977 if (!acpi_battery_dir)
0f66af53 978 return;
d7380965 979#endif
aa650bbd 980 if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
fdcedbba 981#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 982 acpi_unlock_battery_dir(acpi_battery_dir);
d7380965 983#endif
0f66af53 984 return;
1da177e4 985 }
0f66af53
AV		 986 return;
987}
988
989static int __init acpi_battery_init(void)
990{
991 async_schedule(acpi_battery_init_async, NULL);
d550d98d 992 return 0;
1da177e4
LT		 993}
994
4be44fcd 995static void __exit acpi_battery_exit(void)
1da177e4 996{
1da177e4 997 acpi_bus_unregister_driver(&acpi_battery_driver);
fdcedbba 998#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 999 acpi_unlock_battery_dir(acpi_battery_dir);
d7380965 1000#endif
1da177e4
LT		 1001}
1002
1da177e4
LT		 1003module_init(acpi_battery_init);
1004module_exit(acpi_battery_exit);
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