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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 | 62 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 63 | |
f52fd66d | 64 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 65 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 66 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
67 | MODULE_LICENSE("GPL"); |
68 | ||
f1d4661a AS |
69 | static unsigned int cache_time = 1000; |
70 | module_param(cache_time, uint, 0644); | |
71 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 72 | |
fdcedbba | 73 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 RT |
74 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
75 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
76 | ||
d7380965 AS |
77 | enum acpi_battery_files { |
78 | info_tag = 0, | |
79 | state_tag, | |
80 | alarm_tag, | |
81 | ACPI_BATTERY_NUMFILES, | |
82 | }; | |
83 | ||
84 | #endif | |
85 | ||
1ba90e3a TR |
86 | static const struct acpi_device_id battery_device_ids[] = { |
87 | {"PNP0C0A", 0}, | |
88 | {"", 0}, | |
89 | }; | |
1ba90e3a | 90 | |
aa650bbd | 91 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 92 | |
7b3bcc4a AS |
93 | enum { |
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 | 103 | struct 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 | 139 | inline 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 |
145 | static 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 | 160 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 161 | |
56f382a0 RH |
162 | static 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 |
185 | static 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 | ||
253 | static 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 | ||
269 | static 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 | 288 | inline 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 |
297 | struct acpi_offsets { |
298 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
299 | u8 mode; /* int or string? */ | |
300 | }; | |
b6ce4083 | 301 | |
038fdea2 AS |
302 | static 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 |
309 | static 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 |
325 | static 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 |
347 | static 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 | ||
379 | static 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 | ||
388 | static 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 | 419 | static 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 | 455 | static 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 | 479 | static 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 |
497 | static 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 | ||
505 | static 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 | ||
518 | static 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 | ||
524 | static 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 | ||
548 | static 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 |
558 | static 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 | 565 | static 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 | 598 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 599 | |
78490d82 | 600 | static 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 | 656 | static 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 | 703 | static 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 |
726 | static 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 | ||
754 | typedef int(*print_func)(struct seq_file *seq, int result); | |
aa650bbd AS |
755 | |
756 | static 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 |
762 | static 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) \ |
770 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
771 | { \ | |
772 | return acpi_battery_read(_name##_tag, seq); \ | |
773 | } \ | |
774 | static 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 |
779 | DECLARE_FILE_FUNCTIONS(info); |
780 | DECLARE_FILE_FUNCTIONS(state); | |
781 | DECLARE_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 |
812 | static 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 | 825 | static 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 | 849 | static 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 | 868 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 869 | { |
d9406691 BH |
870 | struct acpi_battery *battery = acpi_driver_data(device); |
871 | ||
1da177e4 | 872 | if (!battery) |
d550d98d | 873 | return; |
f1d4661a AS |
874 | acpi_battery_update(battery); |
875 | acpi_bus_generate_proc_event(device, event, | |
876 | acpi_battery_present(battery)); | |
877 | acpi_bus_generate_netlink_event(device->pnp.device_class, | |
0794469d | 878 | dev_name(&device->dev), event, |
9ea7d575 | 879 | acpi_battery_present(battery)); |
97749cd9 | 880 | #ifdef CONFIG_ACPI_SYSFS_POWER |
2345baf4 | 881 | /* acpi_battery_update could remove power_supply object */ |
508df92d | 882 | if (battery->bat.dev) |
f79e1cec | 883 | power_supply_changed(&battery->bat); |
97749cd9 | 884 | #endif |
1da177e4 LT |
885 | } |
886 | ||
4be44fcd | 887 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 888 | { |
4be44fcd | 889 | int result = 0; |
4be44fcd | 890 | struct acpi_battery *battery = NULL; |
c67fcd67 | 891 | acpi_handle handle; |
1da177e4 | 892 | if (!device) |
d550d98d | 893 | return -EINVAL; |
36bcbec7 | 894 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 895 | if (!battery) |
d550d98d | 896 | return -ENOMEM; |
145def84 | 897 | battery->device = device; |
1da177e4 LT |
898 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
899 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 900 | device->driver_data = battery; |
038fdea2 | 901 | mutex_init(&battery->lock); |
c67fcd67 AS |
902 | if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle, |
903 | "_BIX", &handle))) | |
904 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); | |
f1d4661a | 905 | acpi_battery_update(battery); |
fdcedbba | 906 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 907 | result = acpi_battery_add_fs(device); |
d7380965 | 908 | #endif |
586caae3 LB |
909 | if (!result) { |
910 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", | |
911 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
912 | device->status.battery_present ? "present" : "absent"); | |
913 | } else { | |
fdcedbba | 914 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 915 | acpi_battery_remove_fs(device); |
d7380965 | 916 | #endif |
1da177e4 LT |
917 | kfree(battery); |
918 | } | |
d550d98d | 919 | return result; |
1da177e4 LT |
920 | } |
921 | ||
4be44fcd | 922 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 923 | { |
4be44fcd | 924 | struct acpi_battery *battery = NULL; |
1da177e4 | 925 | |
1da177e4 | 926 | if (!device || !acpi_driver_data(device)) |
d550d98d | 927 | return -EINVAL; |
50dd0969 | 928 | battery = acpi_driver_data(device); |
fdcedbba | 929 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 930 | acpi_battery_remove_fs(device); |
d7380965 | 931 | #endif |
97749cd9 | 932 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d | 933 | sysfs_remove_battery(battery); |
97749cd9 | 934 | #endif |
038fdea2 | 935 | mutex_destroy(&battery->lock); |
1da177e4 | 936 | kfree(battery); |
d550d98d | 937 | return 0; |
1da177e4 LT |
938 | } |
939 | ||
34c4415a | 940 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 941 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
942 | { |
943 | struct acpi_battery *battery; | |
34c4415a JK |
944 | if (!device) |
945 | return -EINVAL; | |
f1d4661a AS |
946 | battery = acpi_driver_data(device); |
947 | battery->update_time = 0; | |
508df92d | 948 | acpi_battery_update(battery); |
b6ce4083 | 949 | return 0; |
34c4415a JK |
950 | } |
951 | ||
aa650bbd AS |
952 | static struct acpi_driver acpi_battery_driver = { |
953 | .name = "battery", | |
954 | .class = ACPI_BATTERY_CLASS, | |
955 | .ids = battery_device_ids, | |
d9406691 | 956 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
957 | .ops = { |
958 | .add = acpi_battery_add, | |
959 | .resume = acpi_battery_resume, | |
960 | .remove = acpi_battery_remove, | |
d9406691 | 961 | .notify = acpi_battery_notify, |
aa650bbd AS |
962 | }, |
963 | }; | |
964 | ||
b0cbc861 | 965 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 966 | { |
4d8316d5 | 967 | if (acpi_disabled) |
0f66af53 | 968 | return; |
fdcedbba | 969 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 970 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 971 | if (!acpi_battery_dir) |
0f66af53 | 972 | return; |
d7380965 | 973 | #endif |
aa650bbd | 974 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
fdcedbba | 975 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 976 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 977 | #endif |
0f66af53 | 978 | return; |
1da177e4 | 979 | } |
0f66af53 AV |
980 | return; |
981 | } | |
982 | ||
983 | static int __init acpi_battery_init(void) | |
984 | { | |
985 | async_schedule(acpi_battery_init_async, NULL); | |
d550d98d | 986 | return 0; |
1da177e4 LT |
987 | } |
988 | ||
4be44fcd | 989 | static void __exit acpi_battery_exit(void) |
1da177e4 | 990 | { |
1da177e4 | 991 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fdcedbba | 992 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 993 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 994 | #endif |
1da177e4 LT |
995 | } |
996 | ||
1da177e4 LT |
997 | module_init(acpi_battery_init); |
998 | module_exit(acpi_battery_exit); |