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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> | |
d7380965 AS |
45 | #include <linux/power_supply.h> |
46 | ||
a192a958 LB |
47 | #define PREFIX "ACPI: " |
48 | ||
1da177e4 LT |
49 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
50 | ||
1da177e4 | 51 | #define ACPI_BATTERY_CLASS "battery" |
1da177e4 | 52 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 LT |
53 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
54 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
c67fcd67 | 55 | #define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82 |
1da177e4 | 56 | |
1da177e4 | 57 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 58 | |
f52fd66d | 59 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 60 | |
f52fd66d | 61 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 62 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 63 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
64 | MODULE_LICENSE("GPL"); |
65 | ||
f1d4661a AS |
66 | static unsigned int cache_time = 1000; |
67 | module_param(cache_time, uint, 0644); | |
68 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 69 | |
fdcedbba | 70 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 RT |
71 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
72 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
73 | ||
d7380965 AS |
74 | enum acpi_battery_files { |
75 | info_tag = 0, | |
76 | state_tag, | |
77 | alarm_tag, | |
78 | ACPI_BATTERY_NUMFILES, | |
79 | }; | |
80 | ||
81 | #endif | |
82 | ||
1ba90e3a TR |
83 | static const struct acpi_device_id battery_device_ids[] = { |
84 | {"PNP0C0A", 0}, | |
85 | {"", 0}, | |
86 | }; | |
1ba90e3a | 87 | |
aa650bbd | 88 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 89 | |
7b3bcc4a AS |
90 | enum { |
91 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 AS |
92 | ACPI_BATTERY_XINFO_PRESENT, |
93 | /* For buggy DSDTs that report negative 16-bit values for either | |
94 | * charging or discharging current and/or report 0 as 65536 | |
95 | * due to bad math. | |
96 | */ | |
7b3bcc4a | 97 | ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, |
557d5868 | 98 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
7b3bcc4a | 99 | }; |
78490d82 | 100 | |
1da177e4 | 101 | struct acpi_battery { |
038fdea2 | 102 | struct mutex lock; |
d7380965 | 103 | struct power_supply bat; |
f1d4661a AS |
104 | struct acpi_device *device; |
105 | unsigned long update_time; | |
7faa144a | 106 | int rate_now; |
d7380965 AS |
107 | int capacity_now; |
108 | int voltage_now; | |
038fdea2 | 109 | int design_capacity; |
d7380965 | 110 | int full_charge_capacity; |
038fdea2 AS |
111 | int technology; |
112 | int design_voltage; | |
113 | int design_capacity_warning; | |
114 | int design_capacity_low; | |
c67fcd67 AS |
115 | int cycle_count; |
116 | int measurement_accuracy; | |
117 | int max_sampling_time; | |
118 | int min_sampling_time; | |
119 | int max_averaging_interval; | |
120 | int min_averaging_interval; | |
038fdea2 AS |
121 | int capacity_granularity_1; |
122 | int capacity_granularity_2; | |
f1d4661a | 123 | int alarm; |
038fdea2 AS |
124 | char model_number[32]; |
125 | char serial_number[32]; | |
126 | char type[32]; | |
127 | char oem_info[32]; | |
f1d4661a AS |
128 | int state; |
129 | int power_unit; | |
7b3bcc4a | 130 | unsigned long flags; |
1da177e4 LT |
131 | }; |
132 | ||
3138b32d ZR |
133 | static int acpi_battery_update(struct acpi_battery *battery); |
134 | ||
d7380965 AS |
135 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat); |
136 | ||
78490d82 | 137 | inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 138 | { |
78490d82 AS |
139 | return battery->device->status.battery_present; |
140 | } | |
038fdea2 | 141 | |
d7380965 AS |
142 | static int acpi_battery_technology(struct acpi_battery *battery) |
143 | { | |
144 | if (!strcasecmp("NiCd", battery->type)) | |
145 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
146 | if (!strcasecmp("NiMH", battery->type)) | |
147 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
148 | if (!strcasecmp("LION", battery->type)) | |
149 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 150 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 151 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
152 | if (!strcasecmp("LiP", battery->type)) |
153 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
154 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
155 | } | |
156 | ||
9104476e | 157 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 158 | |
56f382a0 RH |
159 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
160 | { | |
161 | /* either charging or discharging */ | |
162 | if (battery->state != 0) | |
163 | return 0; | |
164 | ||
165 | /* battery not reporting charge */ | |
166 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
167 | battery->capacity_now == 0) | |
168 | return 0; | |
169 | ||
170 | /* good batteries update full_charge as the batteries degrade */ | |
171 | if (battery->full_charge_capacity == battery->capacity_now) | |
172 | return 1; | |
173 | ||
174 | /* fallback to using design values for broken batteries */ | |
175 | if (battery->design_capacity == battery->capacity_now) | |
176 | return 1; | |
177 | ||
178 | /* we don't do any sort of metric based on percentages */ | |
179 | return 0; | |
180 | } | |
181 | ||
d7380965 AS |
182 | static int acpi_battery_get_property(struct power_supply *psy, |
183 | enum power_supply_property psp, | |
184 | union power_supply_propval *val) | |
185 | { | |
a1b4bd69 | 186 | int ret = 0; |
d7380965 AS |
187 | struct acpi_battery *battery = to_acpi_battery(psy); |
188 | ||
3138b32d ZR |
189 | if (acpi_battery_update(battery)) |
190 | return -ENODEV; | |
191 | ||
9104476e AS |
192 | if (acpi_battery_present(battery)) { |
193 | /* run battery update only if it is present */ | |
194 | acpi_battery_get_state(battery); | |
195 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
196 | return -ENODEV; |
197 | switch (psp) { | |
198 | case POWER_SUPPLY_PROP_STATUS: | |
199 | if (battery->state & 0x01) | |
200 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
201 | else if (battery->state & 0x02) | |
202 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
56f382a0 | 203 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 204 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
205 | else |
206 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
207 | break; |
208 | case POWER_SUPPLY_PROP_PRESENT: | |
209 | val->intval = acpi_battery_present(battery); | |
210 | break; | |
211 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
212 | val->intval = acpi_battery_technology(battery); | |
213 | break; | |
c67fcd67 AS |
214 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
215 | val->intval = battery->cycle_count; | |
216 | break; | |
d7380965 | 217 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
218 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
219 | ret = -ENODEV; | |
220 | else | |
221 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
222 | break; |
223 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
224 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
225 | ret = -ENODEV; | |
226 | else | |
227 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
228 | break; |
229 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 230 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
231 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
232 | ret = -ENODEV; | |
233 | else | |
234 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
235 | break; |
236 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
237 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
a1b4bd69 RW |
238 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
239 | ret = -ENODEV; | |
240 | else | |
241 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
242 | break; |
243 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
244 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
a1b4bd69 RW |
245 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
246 | ret = -ENODEV; | |
247 | else | |
248 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
249 | break; |
250 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
251 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
252 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
253 | ret = -ENODEV; | |
254 | else | |
255 | val->intval = battery->capacity_now * 1000; | |
d7380965 AS |
256 | break; |
257 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
258 | val->strval = battery->model_number; | |
259 | break; | |
260 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
261 | val->strval = battery->oem_info; | |
262 | break; | |
7c2670bb | 263 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
264 | val->strval = battery->serial_number; | |
265 | break; | |
d7380965 | 266 | default: |
a1b4bd69 | 267 | ret = -EINVAL; |
d7380965 | 268 | } |
a1b4bd69 | 269 | return ret; |
d7380965 AS |
270 | } |
271 | ||
272 | static enum power_supply_property charge_battery_props[] = { | |
273 | POWER_SUPPLY_PROP_STATUS, | |
274 | POWER_SUPPLY_PROP_PRESENT, | |
275 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 276 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
277 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
278 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
279 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
280 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
281 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
282 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
283 | POWER_SUPPLY_PROP_MODEL_NAME, | |
284 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 285 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
286 | }; |
287 | ||
288 | static enum power_supply_property energy_battery_props[] = { | |
289 | POWER_SUPPLY_PROP_STATUS, | |
290 | POWER_SUPPLY_PROP_PRESENT, | |
291 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 292 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
293 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
294 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 295 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
296 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
297 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
298 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
299 | POWER_SUPPLY_PROP_MODEL_NAME, | |
300 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 301 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
302 | }; |
303 | ||
fdcedbba | 304 | #ifdef CONFIG_ACPI_PROCFS_POWER |
f1d4661a | 305 | inline char *acpi_battery_units(struct acpi_battery *battery) |
78490d82 | 306 | { |
f1d4661a | 307 | return (battery->power_unit)?"mA":"mW"; |
b6ce4083 | 308 | } |
d7380965 | 309 | #endif |
b6ce4083 | 310 | |
78490d82 AS |
311 | /* -------------------------------------------------------------------------- |
312 | Battery Management | |
313 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
314 | struct acpi_offsets { |
315 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
316 | u8 mode; /* int or string? */ | |
317 | }; | |
b6ce4083 | 318 | |
038fdea2 AS |
319 | static struct acpi_offsets state_offsets[] = { |
320 | {offsetof(struct acpi_battery, state), 0}, | |
7faa144a | 321 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
322 | {offsetof(struct acpi_battery, capacity_now), 0}, |
323 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 324 | }; |
b6ce4083 | 325 | |
038fdea2 AS |
326 | static struct acpi_offsets info_offsets[] = { |
327 | {offsetof(struct acpi_battery, power_unit), 0}, | |
328 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 329 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
330 | {offsetof(struct acpi_battery, technology), 0}, |
331 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
332 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
333 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
334 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
335 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
336 | {offsetof(struct acpi_battery, model_number), 1}, | |
337 | {offsetof(struct acpi_battery, serial_number), 1}, | |
338 | {offsetof(struct acpi_battery, type), 1}, | |
339 | {offsetof(struct acpi_battery, oem_info), 1}, | |
340 | }; | |
b6ce4083 | 341 | |
c67fcd67 AS |
342 | static struct acpi_offsets extended_info_offsets[] = { |
343 | {offsetof(struct acpi_battery, power_unit), 0}, | |
344 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
345 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
346 | {offsetof(struct acpi_battery, technology), 0}, | |
347 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
348 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
349 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
350 | {offsetof(struct acpi_battery, cycle_count), 0}, | |
351 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
352 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
353 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
354 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
355 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
356 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
357 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
358 | {offsetof(struct acpi_battery, model_number), 1}, | |
359 | {offsetof(struct acpi_battery, serial_number), 1}, | |
360 | {offsetof(struct acpi_battery, type), 1}, | |
361 | {offsetof(struct acpi_battery, oem_info), 1}, | |
362 | }; | |
363 | ||
038fdea2 AS |
364 | static int extract_package(struct acpi_battery *battery, |
365 | union acpi_object *package, | |
366 | struct acpi_offsets *offsets, int num) | |
367 | { | |
106449e8 | 368 | int i; |
038fdea2 AS |
369 | union acpi_object *element; |
370 | if (package->type != ACPI_TYPE_PACKAGE) | |
371 | return -EFAULT; | |
372 | for (i = 0; i < num; ++i) { | |
373 | if (package->package.count <= i) | |
374 | return -EFAULT; | |
375 | element = &package->package.elements[i]; | |
376 | if (offsets[i].mode) { | |
106449e8 AS |
377 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
378 | if (element->type == ACPI_TYPE_STRING || | |
379 | element->type == ACPI_TYPE_BUFFER) | |
380 | strncpy(ptr, element->string.pointer, 32); | |
381 | else if (element->type == ACPI_TYPE_INTEGER) { | |
382 | strncpy(ptr, (u8 *)&element->integer.value, | |
439913ff LM |
383 | sizeof(u64)); |
384 | ptr[sizeof(u64)] = 0; | |
b8a1bdb1 AS |
385 | } else |
386 | *ptr = 0; /* don't have value */ | |
038fdea2 | 387 | } else { |
b8a1bdb1 AS |
388 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
389 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
390 | element->integer.value : -1; | |
038fdea2 | 391 | } |
b6ce4083 | 392 | } |
b6ce4083 VL |
393 | return 0; |
394 | } | |
395 | ||
396 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
397 | { | |
aa650bbd | 398 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
399 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
400 | return -ENODEV; | |
401 | } | |
aa650bbd | 402 | return 0; |
b6ce4083 VL |
403 | } |
404 | ||
405 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 406 | { |
aa650bbd | 407 | int result = -EFAULT; |
4be44fcd | 408 | acpi_status status = 0; |
c67fcd67 AS |
409 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)? |
410 | "_BIX" : "_BIF"; | |
411 | ||
4be44fcd | 412 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 413 | |
b6ce4083 VL |
414 | if (!acpi_battery_present(battery)) |
415 | return 0; | |
038fdea2 | 416 | mutex_lock(&battery->lock); |
c67fcd67 AS |
417 | status = acpi_evaluate_object(battery->device->handle, name, |
418 | NULL, &buffer); | |
038fdea2 | 419 | mutex_unlock(&battery->lock); |
aa650bbd | 420 | |
1da177e4 | 421 | if (ACPI_FAILURE(status)) { |
c67fcd67 | 422 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
d550d98d | 423 | return -ENODEV; |
1da177e4 | 424 | } |
c67fcd67 AS |
425 | if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) |
426 | result = extract_package(battery, buffer.pointer, | |
427 | extended_info_offsets, | |
428 | ARRAY_SIZE(extended_info_offsets)); | |
429 | else | |
430 | result = extract_package(battery, buffer.pointer, | |
431 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 432 | kfree(buffer.pointer); |
557d5868 ZR |
433 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
434 | battery->full_charge_capacity = battery->design_capacity; | |
d550d98d | 435 | return result; |
1da177e4 LT |
436 | } |
437 | ||
b6ce4083 | 438 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 439 | { |
4be44fcd LB |
440 | int result = 0; |
441 | acpi_status status = 0; | |
442 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 443 | |
b6ce4083 VL |
444 | if (!acpi_battery_present(battery)) |
445 | return 0; | |
1da177e4 | 446 | |
f1d4661a AS |
447 | if (battery->update_time && |
448 | time_before(jiffies, battery->update_time + | |
449 | msecs_to_jiffies(cache_time))) | |
450 | return 0; | |
451 | ||
038fdea2 | 452 | mutex_lock(&battery->lock); |
f1d4661a | 453 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
454 | NULL, &buffer); |
455 | mutex_unlock(&battery->lock); | |
5b31d895 | 456 | |
1da177e4 | 457 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 458 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 459 | return -ENODEV; |
1da177e4 | 460 | } |
aa650bbd | 461 | |
038fdea2 AS |
462 | result = extract_package(battery, buffer.pointer, |
463 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 464 | battery->update_time = jiffies; |
78490d82 | 465 | kfree(buffer.pointer); |
bc76f90b | 466 | |
7b3bcc4a | 467 | if (test_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags) && |
bc76f90b HM |
468 | battery->rate_now != -1) |
469 | battery->rate_now = abs((s16)battery->rate_now); | |
470 | ||
557d5868 ZR |
471 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
472 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
473 | battery->capacity_now = (battery->capacity_now * | |
474 | battery->full_charge_capacity) / 100; | |
b6ce4083 VL |
475 | return result; |
476 | } | |
1da177e4 | 477 | |
aa650bbd | 478 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 479 | { |
4be44fcd | 480 | acpi_status status = 0; |
aa650bbd | 481 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
4be44fcd | 482 | struct acpi_object_list arg_list = { 1, &arg0 }; |
1da177e4 | 483 | |
c67fcd67 | 484 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 485 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 486 | return -ENODEV; |
1da177e4 | 487 | |
aa650bbd | 488 | arg0.integer.value = battery->alarm; |
1da177e4 | 489 | |
038fdea2 | 490 | mutex_lock(&battery->lock); |
f1d4661a AS |
491 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
492 | &arg_list, NULL); | |
038fdea2 | 493 | mutex_unlock(&battery->lock); |
aa650bbd | 494 | |
1da177e4 | 495 | if (ACPI_FAILURE(status)) |
d550d98d | 496 | return -ENODEV; |
1da177e4 | 497 | |
aa650bbd | 498 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 499 | return 0; |
1da177e4 LT |
500 | } |
501 | ||
b6ce4083 | 502 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 503 | { |
4be44fcd LB |
504 | acpi_status status = AE_OK; |
505 | acpi_handle handle = NULL; | |
4be44fcd | 506 | |
b6ce4083 | 507 | /* See if alarms are supported, and if so, set default */ |
f1d4661a AS |
508 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
509 | if (ACPI_FAILURE(status)) { | |
7b3bcc4a | 510 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 511 | return 0; |
b6ce4083 | 512 | } |
7b3bcc4a | 513 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
514 | if (!battery->alarm) |
515 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 516 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 517 | } |
1da177e4 | 518 | |
508df92d AB |
519 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
520 | struct device_attribute *attr, | |
521 | char *buf) | |
522 | { | |
523 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
524 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
525 | } | |
526 | ||
527 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
528 | struct device_attribute *attr, | |
529 | const char *buf, size_t count) | |
530 | { | |
531 | unsigned long x; | |
532 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
533 | if (sscanf(buf, "%ld\n", &x) == 1) | |
534 | battery->alarm = x/1000; | |
535 | if (acpi_battery_present(battery)) | |
536 | acpi_battery_set_alarm(battery); | |
537 | return count; | |
538 | } | |
539 | ||
540 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 541 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
542 | .show = acpi_battery_alarm_show, |
543 | .store = acpi_battery_alarm_store, | |
544 | }; | |
545 | ||
546 | static int sysfs_add_battery(struct acpi_battery *battery) | |
547 | { | |
548 | int result; | |
549 | ||
508df92d AB |
550 | if (battery->power_unit) { |
551 | battery->bat.properties = charge_battery_props; | |
552 | battery->bat.num_properties = | |
553 | ARRAY_SIZE(charge_battery_props); | |
554 | } else { | |
555 | battery->bat.properties = energy_battery_props; | |
556 | battery->bat.num_properties = | |
557 | ARRAY_SIZE(energy_battery_props); | |
558 | } | |
559 | ||
560 | battery->bat.name = acpi_device_bid(battery->device); | |
561 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
562 | battery->bat.get_property = acpi_battery_get_property; | |
563 | ||
564 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
565 | if (result) | |
566 | return result; | |
567 | return device_create_file(battery->bat.dev, &alarm_attr); | |
568 | } | |
569 | ||
570 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
571 | { | |
572 | if (!battery->bat.dev) | |
573 | return; | |
574 | device_remove_file(battery->bat.dev, &alarm_attr); | |
575 | power_supply_unregister(&battery->bat); | |
9104476e | 576 | battery->bat.dev = NULL; |
508df92d AB |
577 | } |
578 | ||
bc76f90b HM |
579 | static void acpi_battery_quirks(struct acpi_battery *battery) |
580 | { | |
bc76f90b | 581 | if (dmi_name_in_vendors("Acer") && battery->power_unit) { |
7b3bcc4a | 582 | set_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags); |
bc76f90b HM |
583 | } |
584 | } | |
585 | ||
557d5868 ZR |
586 | /* |
587 | * According to the ACPI spec, some kinds of primary batteries can | |
588 | * report percentage battery remaining capacity directly to OS. | |
589 | * In this case, it reports the Last Full Charged Capacity == 100 | |
590 | * and BatteryPresentRate == 0xFFFFFFFF. | |
591 | * | |
592 | * Now we found some battery reports percentage remaining capacity | |
593 | * even if it's rechargeable. | |
594 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
595 | * | |
596 | * Handle this correctly so that they won't break userspace. | |
597 | */ | |
598 | static void acpi_battery_quirks2(struct acpi_battery *battery) | |
599 | { | |
600 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
601 | return ; | |
602 | ||
603 | if (battery->full_charge_capacity == 100 && | |
604 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
605 | battery->capacity_now >=0 && battery->capacity_now <= 100) { | |
606 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); | |
607 | battery->full_charge_capacity = battery->design_capacity; | |
608 | battery->capacity_now = (battery->capacity_now * | |
609 | battery->full_charge_capacity) / 100; | |
610 | } | |
611 | } | |
612 | ||
f1d4661a | 613 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 614 | { |
50b17851 | 615 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 616 | result = acpi_battery_get_status(battery); |
508df92d | 617 | if (result) |
b6ce4083 | 618 | return result; |
508df92d AB |
619 | if (!acpi_battery_present(battery)) { |
620 | sysfs_remove_battery(battery); | |
97749cd9 | 621 | battery->update_time = 0; |
508df92d | 622 | return 0; |
b6ce4083 | 623 | } |
50b17851 AS |
624 | if (!battery->update_time || |
625 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
626 | result = acpi_battery_get_info(battery); |
627 | if (result) | |
628 | return result; | |
bc76f90b | 629 | acpi_battery_quirks(battery); |
97749cd9 AS |
630 | acpi_battery_init_alarm(battery); |
631 | } | |
508df92d AB |
632 | if (!battery->bat.dev) |
633 | sysfs_add_battery(battery); | |
557d5868 ZR |
634 | result = acpi_battery_get_state(battery); |
635 | acpi_battery_quirks2(battery); | |
636 | return result; | |
4bd35cdb VL |
637 | } |
638 | ||
1da177e4 LT |
639 | /* -------------------------------------------------------------------------- |
640 | FS Interface (/proc) | |
641 | -------------------------------------------------------------------------- */ | |
642 | ||
fdcedbba | 643 | #ifdef CONFIG_ACPI_PROCFS_POWER |
4be44fcd | 644 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 645 | |
78490d82 | 646 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 647 | { |
50dd0969 | 648 | struct acpi_battery *battery = seq->private; |
1da177e4 | 649 | |
b6ce4083 | 650 | if (result) |
1da177e4 LT |
651 | goto end; |
652 | ||
aa650bbd AS |
653 | seq_printf(seq, "present: %s\n", |
654 | acpi_battery_present(battery)?"yes":"no"); | |
655 | if (!acpi_battery_present(battery)) | |
1da177e4 | 656 | goto end; |
038fdea2 | 657 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
658 | seq_printf(seq, "design capacity: unknown\n"); |
659 | else | |
660 | seq_printf(seq, "design capacity: %d %sh\n", | |
aa650bbd AS |
661 | battery->design_capacity, |
662 | acpi_battery_units(battery)); | |
1da177e4 | 663 | |
d7380965 | 664 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
665 | seq_printf(seq, "last full capacity: unknown\n"); |
666 | else | |
667 | seq_printf(seq, "last full capacity: %d %sh\n", | |
d7380965 | 668 | battery->full_charge_capacity, |
aa650bbd AS |
669 | acpi_battery_units(battery)); |
670 | ||
671 | seq_printf(seq, "battery technology: %srechargeable\n", | |
672 | (!battery->technology)?"non-":""); | |
1da177e4 | 673 | |
038fdea2 | 674 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
675 | seq_printf(seq, "design voltage: unknown\n"); |
676 | else | |
677 | seq_printf(seq, "design voltage: %d mV\n", | |
aa650bbd | 678 | battery->design_voltage); |
1da177e4 | 679 | seq_printf(seq, "design capacity warning: %d %sh\n", |
aa650bbd AS |
680 | battery->design_capacity_warning, |
681 | acpi_battery_units(battery)); | |
1da177e4 | 682 | seq_printf(seq, "design capacity low: %d %sh\n", |
aa650bbd AS |
683 | battery->design_capacity_low, |
684 | acpi_battery_units(battery)); | |
c67fcd67 | 685 | seq_printf(seq, "cycle count: %i\n", battery->cycle_count); |
1da177e4 | 686 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
aa650bbd AS |
687 | battery->capacity_granularity_1, |
688 | acpi_battery_units(battery)); | |
1da177e4 | 689 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
aa650bbd AS |
690 | battery->capacity_granularity_2, |
691 | acpi_battery_units(battery)); | |
038fdea2 AS |
692 | seq_printf(seq, "model number: %s\n", battery->model_number); |
693 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
694 | seq_printf(seq, "battery type: %s\n", battery->type); | |
695 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
4be44fcd | 696 | end: |
b6ce4083 VL |
697 | if (result) |
698 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
b6ce4083 VL |
699 | return result; |
700 | } | |
701 | ||
78490d82 | 702 | static int acpi_battery_print_state(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 | ||
aa650bbd AS |
709 | seq_printf(seq, "present: %s\n", |
710 | acpi_battery_present(battery)?"yes":"no"); | |
711 | if (!acpi_battery_present(battery)) | |
1da177e4 | 712 | goto end; |
b6ce4083 | 713 | |
aa650bbd AS |
714 | seq_printf(seq, "capacity state: %s\n", |
715 | (battery->state & 0x04)?"critical":"ok"); | |
716 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
4be44fcd LB |
717 | seq_printf(seq, |
718 | "charging state: charging/discharging\n"); | |
aa650bbd | 719 | else if (battery->state & 0x01) |
1da177e4 | 720 | seq_printf(seq, "charging state: discharging\n"); |
038fdea2 | 721 | else if (battery->state & 0x02) |
1da177e4 | 722 | seq_printf(seq, "charging state: charging\n"); |
aa650bbd | 723 | else |
1da177e4 | 724 | seq_printf(seq, "charging state: charged\n"); |
1da177e4 | 725 | |
7faa144a | 726 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
727 | seq_printf(seq, "present rate: unknown\n"); |
728 | else | |
729 | seq_printf(seq, "present rate: %d %s\n", | |
7faa144a | 730 | battery->rate_now, acpi_battery_units(battery)); |
1da177e4 | 731 | |
d7380965 | 732 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
733 | seq_printf(seq, "remaining capacity: unknown\n"); |
734 | else | |
735 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
d7380965 AS |
736 | battery->capacity_now, acpi_battery_units(battery)); |
737 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 LT |
738 | seq_printf(seq, "present voltage: unknown\n"); |
739 | else | |
740 | seq_printf(seq, "present voltage: %d mV\n", | |
d7380965 | 741 | battery->voltage_now); |
4be44fcd | 742 | end: |
aa650bbd | 743 | if (result) |
b6ce4083 | 744 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
b6ce4083 VL |
745 | |
746 | return result; | |
747 | } | |
748 | ||
78490d82 | 749 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 750 | { |
50dd0969 | 751 | struct acpi_battery *battery = seq->private; |
1da177e4 | 752 | |
b6ce4083 | 753 | if (result) |
1da177e4 LT |
754 | goto end; |
755 | ||
b6ce4083 | 756 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
757 | seq_printf(seq, "present: no\n"); |
758 | goto end; | |
759 | } | |
1da177e4 LT |
760 | seq_printf(seq, "alarm: "); |
761 | if (!battery->alarm) | |
762 | seq_printf(seq, "unsupported\n"); | |
763 | else | |
aa650bbd AS |
764 | seq_printf(seq, "%u %sh\n", battery->alarm, |
765 | acpi_battery_units(battery)); | |
4be44fcd | 766 | end: |
b6ce4083 VL |
767 | if (result) |
768 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
b6ce4083 VL |
769 | return result; |
770 | } | |
771 | ||
f1d4661a AS |
772 | static ssize_t acpi_battery_write_alarm(struct file *file, |
773 | const char __user * buffer, | |
774 | size_t count, loff_t * ppos) | |
1da177e4 | 775 | { |
4be44fcd LB |
776 | int result = 0; |
777 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
778 | struct seq_file *m = file->private_data; |
779 | struct acpi_battery *battery = m->private; | |
1da177e4 | 780 | |
1da177e4 | 781 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 782 | return -EINVAL; |
b6ce4083 VL |
783 | if (!acpi_battery_present(battery)) { |
784 | result = -ENODEV; | |
785 | goto end; | |
786 | } | |
b6ce4083 VL |
787 | if (copy_from_user(alarm_string, buffer, count)) { |
788 | result = -EFAULT; | |
789 | goto end; | |
790 | } | |
1da177e4 | 791 | alarm_string[count] = '\0'; |
f1d4661a | 792 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
aa650bbd | 793 | result = acpi_battery_set_alarm(battery); |
b6ce4083 | 794 | end: |
b6ce4083 | 795 | if (!result) |
f1d4661a | 796 | return count; |
78490d82 AS |
797 | return result; |
798 | } | |
799 | ||
800 | typedef int(*print_func)(struct seq_file *seq, int result); | |
aa650bbd AS |
801 | |
802 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
803 | acpi_battery_print_info, | |
804 | acpi_battery_print_state, | |
805 | acpi_battery_print_alarm, | |
78490d82 | 806 | }; |
b6ce4083 | 807 | |
78490d82 AS |
808 | static int acpi_battery_read(int fid, struct seq_file *seq) |
809 | { | |
810 | struct acpi_battery *battery = seq->private; | |
f1d4661a | 811 | int result = acpi_battery_update(battery); |
aa650bbd | 812 | return acpi_print_funcs[fid](seq, result); |
78490d82 AS |
813 | } |
814 | ||
aa650bbd AS |
815 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
816 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
817 | { \ | |
818 | return acpi_battery_read(_name##_tag, seq); \ | |
819 | } \ | |
820 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
821 | { \ | |
822 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ | |
78490d82 AS |
823 | } |
824 | ||
aa650bbd AS |
825 | DECLARE_FILE_FUNCTIONS(info); |
826 | DECLARE_FILE_FUNCTIONS(state); | |
827 | DECLARE_FILE_FUNCTIONS(alarm); | |
828 | ||
829 | #undef DECLARE_FILE_FUNCTIONS | |
830 | ||
831 | #define FILE_DESCRIPTION_RO(_name) \ | |
832 | { \ | |
833 | .name = __stringify(_name), \ | |
834 | .mode = S_IRUGO, \ | |
835 | .ops = { \ | |
836 | .open = acpi_battery_##_name##_open_fs, \ | |
837 | .read = seq_read, \ | |
838 | .llseek = seq_lseek, \ | |
839 | .release = single_release, \ | |
840 | .owner = THIS_MODULE, \ | |
841 | }, \ | |
842 | } | |
78490d82 | 843 | |
aa650bbd AS |
844 | #define FILE_DESCRIPTION_RW(_name) \ |
845 | { \ | |
846 | .name = __stringify(_name), \ | |
847 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
848 | .ops = { \ | |
849 | .open = acpi_battery_##_name##_open_fs, \ | |
850 | .read = seq_read, \ | |
851 | .llseek = seq_lseek, \ | |
852 | .write = acpi_battery_write_##_name, \ | |
853 | .release = single_release, \ | |
854 | .owner = THIS_MODULE, \ | |
855 | }, \ | |
856 | } | |
1da177e4 | 857 | |
78490d82 AS |
858 | static struct battery_file { |
859 | struct file_operations ops; | |
860 | mode_t mode; | |
070d8eb1 | 861 | const char *name; |
78490d82 | 862 | } acpi_battery_file[] = { |
aa650bbd AS |
863 | FILE_DESCRIPTION_RO(info), |
864 | FILE_DESCRIPTION_RO(state), | |
865 | FILE_DESCRIPTION_RW(alarm), | |
1da177e4 LT |
866 | }; |
867 | ||
aa650bbd AS |
868 | #undef FILE_DESCRIPTION_RO |
869 | #undef FILE_DESCRIPTION_RW | |
870 | ||
4be44fcd | 871 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 872 | { |
4be44fcd | 873 | struct proc_dir_entry *entry = NULL; |
78490d82 | 874 | int i; |
1da177e4 | 875 | |
1da177e4 LT |
876 | if (!acpi_device_dir(device)) { |
877 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 878 | acpi_battery_dir); |
1da177e4 | 879 | if (!acpi_device_dir(device)) |
d550d98d | 880 | return -ENODEV; |
1da177e4 LT |
881 | } |
882 | ||
78490d82 | 883 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
cf7acfab DL |
884 | entry = proc_create_data(acpi_battery_file[i].name, |
885 | acpi_battery_file[i].mode, | |
886 | acpi_device_dir(device), | |
887 | &acpi_battery_file[i].ops, | |
888 | acpi_driver_data(device)); | |
78490d82 AS |
889 | if (!entry) |
890 | return -ENODEV; | |
1da177e4 | 891 | } |
d550d98d | 892 | return 0; |
1da177e4 LT |
893 | } |
894 | ||
aa650bbd | 895 | static void acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 896 | { |
78490d82 | 897 | int i; |
aa650bbd AS |
898 | if (!acpi_device_dir(device)) |
899 | return; | |
900 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
901 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 902 | acpi_device_dir(device)); |
1da177e4 | 903 | |
aa650bbd AS |
904 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
905 | acpi_device_dir(device) = NULL; | |
1da177e4 LT |
906 | } |
907 | ||
d7380965 | 908 | #endif |
3e58ea0d | 909 | |
1da177e4 LT |
910 | /* -------------------------------------------------------------------------- |
911 | Driver Interface | |
912 | -------------------------------------------------------------------------- */ | |
913 | ||
d9406691 | 914 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 915 | { |
d9406691 | 916 | struct acpi_battery *battery = acpi_driver_data(device); |
153e500f | 917 | struct device *old; |
d9406691 | 918 | |
1da177e4 | 919 | if (!battery) |
d550d98d | 920 | return; |
153e500f | 921 | old = battery->bat.dev; |
f1d4661a AS |
922 | acpi_battery_update(battery); |
923 | acpi_bus_generate_proc_event(device, event, | |
924 | acpi_battery_present(battery)); | |
925 | acpi_bus_generate_netlink_event(device->pnp.device_class, | |
0794469d | 926 | dev_name(&device->dev), event, |
9ea7d575 | 927 | acpi_battery_present(battery)); |
2345baf4 | 928 | /* acpi_battery_update could remove power_supply object */ |
153e500f | 929 | if (old && battery->bat.dev) |
f79e1cec | 930 | power_supply_changed(&battery->bat); |
1da177e4 LT |
931 | } |
932 | ||
4be44fcd | 933 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 934 | { |
4be44fcd | 935 | int result = 0; |
4be44fcd | 936 | struct acpi_battery *battery = NULL; |
c67fcd67 | 937 | acpi_handle handle; |
1da177e4 | 938 | if (!device) |
d550d98d | 939 | return -EINVAL; |
36bcbec7 | 940 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 941 | if (!battery) |
d550d98d | 942 | return -ENOMEM; |
145def84 | 943 | battery->device = device; |
1da177e4 LT |
944 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
945 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 946 | device->driver_data = battery; |
038fdea2 | 947 | mutex_init(&battery->lock); |
c67fcd67 AS |
948 | if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle, |
949 | "_BIX", &handle))) | |
950 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); | |
f1d4661a | 951 | acpi_battery_update(battery); |
fdcedbba | 952 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 953 | result = acpi_battery_add_fs(device); |
d7380965 | 954 | #endif |
586caae3 LB |
955 | if (!result) { |
956 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", | |
957 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
958 | device->status.battery_present ? "present" : "absent"); | |
959 | } else { | |
fdcedbba | 960 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 961 | acpi_battery_remove_fs(device); |
d7380965 | 962 | #endif |
1da177e4 LT |
963 | kfree(battery); |
964 | } | |
d550d98d | 965 | return result; |
1da177e4 LT |
966 | } |
967 | ||
4be44fcd | 968 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 969 | { |
4be44fcd | 970 | struct acpi_battery *battery = NULL; |
1da177e4 | 971 | |
1da177e4 | 972 | if (!device || !acpi_driver_data(device)) |
d550d98d | 973 | return -EINVAL; |
50dd0969 | 974 | battery = acpi_driver_data(device); |
fdcedbba | 975 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 976 | acpi_battery_remove_fs(device); |
d7380965 | 977 | #endif |
508df92d | 978 | sysfs_remove_battery(battery); |
038fdea2 | 979 | mutex_destroy(&battery->lock); |
1da177e4 | 980 | kfree(battery); |
d550d98d | 981 | return 0; |
1da177e4 LT |
982 | } |
983 | ||
34c4415a | 984 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 985 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
986 | { |
987 | struct acpi_battery *battery; | |
34c4415a JK |
988 | if (!device) |
989 | return -EINVAL; | |
f1d4661a AS |
990 | battery = acpi_driver_data(device); |
991 | battery->update_time = 0; | |
508df92d | 992 | acpi_battery_update(battery); |
b6ce4083 | 993 | return 0; |
34c4415a JK |
994 | } |
995 | ||
aa650bbd AS |
996 | static struct acpi_driver acpi_battery_driver = { |
997 | .name = "battery", | |
998 | .class = ACPI_BATTERY_CLASS, | |
999 | .ids = battery_device_ids, | |
d9406691 | 1000 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
1001 | .ops = { |
1002 | .add = acpi_battery_add, | |
1003 | .resume = acpi_battery_resume, | |
1004 | .remove = acpi_battery_remove, | |
d9406691 | 1005 | .notify = acpi_battery_notify, |
aa650bbd AS |
1006 | }, |
1007 | }; | |
1008 | ||
b0cbc861 | 1009 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 1010 | { |
4d8316d5 | 1011 | if (acpi_disabled) |
0f66af53 | 1012 | return; |
fdcedbba | 1013 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 1014 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 1015 | if (!acpi_battery_dir) |
0f66af53 | 1016 | return; |
d7380965 | 1017 | #endif |
aa650bbd | 1018 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
fdcedbba | 1019 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 1020 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 1021 | #endif |
0f66af53 | 1022 | return; |
1da177e4 | 1023 | } |
0f66af53 AV |
1024 | return; |
1025 | } | |
1026 | ||
1027 | static int __init acpi_battery_init(void) | |
1028 | { | |
1029 | async_schedule(acpi_battery_init_async, NULL); | |
d550d98d | 1030 | return 0; |
1da177e4 LT |
1031 | } |
1032 | ||
4be44fcd | 1033 | static void __exit acpi_battery_exit(void) |
1da177e4 | 1034 | { |
1da177e4 | 1035 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fdcedbba | 1036 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 1037 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 1038 | #endif |
1da177e4 LT |
1039 | } |
1040 | ||
1da177e4 LT |
1041 | module_init(acpi_battery_init); |
1042 | module_exit(acpi_battery_exit); |