]>
Commit | Line | Data |
---|---|---|
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> |
d7380965 AS |
33 | |
34 | #ifdef CONFIG_ACPI_PROCFS | |
1da177e4 LT |
35 | #include <linux/proc_fs.h> |
36 | #include <linux/seq_file.h> | |
37 | #include <asm/uaccess.h> | |
d7380965 | 38 | #endif |
1da177e4 LT |
39 | |
40 | #include <acpi/acpi_bus.h> | |
41 | #include <acpi/acpi_drivers.h> | |
42 | ||
d7380965 AS |
43 | #include <linux/power_supply.h> |
44 | ||
1da177e4 LT |
45 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
46 | ||
1da177e4 LT |
47 | #define ACPI_BATTERY_COMPONENT 0x00040000 |
48 | #define ACPI_BATTERY_CLASS "battery" | |
1da177e4 | 49 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 LT |
50 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
51 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
1da177e4 | 52 | |
1da177e4 | 53 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 54 | |
f52fd66d | 55 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 56 | |
f52fd66d | 57 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 58 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 59 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
60 | MODULE_LICENSE("GPL"); |
61 | ||
f1d4661a AS |
62 | static unsigned int cache_time = 1000; |
63 | module_param(cache_time, uint, 0644); | |
64 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 65 | |
d7380965 | 66 | #ifdef CONFIG_ACPI_PROCFS |
3f86b832 RT |
67 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
68 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
69 | ||
d7380965 AS |
70 | enum acpi_battery_files { |
71 | info_tag = 0, | |
72 | state_tag, | |
73 | alarm_tag, | |
74 | ACPI_BATTERY_NUMFILES, | |
75 | }; | |
76 | ||
77 | #endif | |
78 | ||
1ba90e3a TR |
79 | static const struct acpi_device_id battery_device_ids[] = { |
80 | {"PNP0C0A", 0}, | |
81 | {"", 0}, | |
82 | }; | |
1ba90e3a | 83 | |
aa650bbd | 84 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 85 | |
78490d82 | 86 | |
1da177e4 | 87 | struct acpi_battery { |
038fdea2 | 88 | struct mutex lock; |
d7380965 | 89 | struct power_supply bat; |
f1d4661a AS |
90 | struct acpi_device *device; |
91 | unsigned long update_time; | |
d7380965 AS |
92 | int current_now; |
93 | int capacity_now; | |
94 | int voltage_now; | |
038fdea2 | 95 | int design_capacity; |
d7380965 | 96 | int full_charge_capacity; |
038fdea2 AS |
97 | int technology; |
98 | int design_voltage; | |
99 | int design_capacity_warning; | |
100 | int design_capacity_low; | |
101 | int capacity_granularity_1; | |
102 | int capacity_granularity_2; | |
f1d4661a | 103 | int alarm; |
038fdea2 AS |
104 | char model_number[32]; |
105 | char serial_number[32]; | |
106 | char type[32]; | |
107 | char oem_info[32]; | |
f1d4661a AS |
108 | int state; |
109 | int power_unit; | |
038fdea2 | 110 | u8 alarm_present; |
1da177e4 LT |
111 | }; |
112 | ||
d7380965 AS |
113 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat); |
114 | ||
78490d82 | 115 | inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 116 | { |
78490d82 AS |
117 | return battery->device->status.battery_present; |
118 | } | |
038fdea2 | 119 | |
d7380965 AS |
120 | static int acpi_battery_technology(struct acpi_battery *battery) |
121 | { | |
122 | if (!strcasecmp("NiCd", battery->type)) | |
123 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
124 | if (!strcasecmp("NiMH", battery->type)) | |
125 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
126 | if (!strcasecmp("LION", battery->type)) | |
127 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
128 | if (!strcasecmp("LiP", battery->type)) | |
129 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
130 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
131 | } | |
132 | ||
133 | static int acpi_battery_get_property(struct power_supply *psy, | |
134 | enum power_supply_property psp, | |
135 | union power_supply_propval *val) | |
136 | { | |
137 | struct acpi_battery *battery = to_acpi_battery(psy); | |
138 | ||
139 | if ((!acpi_battery_present(battery)) && | |
140 | psp != POWER_SUPPLY_PROP_PRESENT) | |
141 | return -ENODEV; | |
142 | switch (psp) { | |
143 | case POWER_SUPPLY_PROP_STATUS: | |
144 | if (battery->state & 0x01) | |
145 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
146 | else if (battery->state & 0x02) | |
147 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
148 | else if (battery->state == 0) | |
149 | val->intval = POWER_SUPPLY_STATUS_FULL; | |
150 | break; | |
151 | case POWER_SUPPLY_PROP_PRESENT: | |
152 | val->intval = acpi_battery_present(battery); | |
153 | break; | |
154 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
155 | val->intval = acpi_battery_technology(battery); | |
156 | break; | |
157 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
158 | val->intval = battery->design_voltage * 1000; | |
159 | break; | |
160 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
161 | val->intval = battery->voltage_now * 1000; | |
162 | break; | |
163 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
164 | val->intval = battery->current_now * 1000; | |
165 | break; | |
166 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
167 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
168 | val->intval = battery->design_capacity * 1000; | |
169 | break; | |
170 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
171 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
172 | val->intval = battery->full_charge_capacity * 1000; | |
173 | break; | |
174 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
175 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
176 | val->intval = battery->capacity_now * 1000; | |
177 | break; | |
178 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
179 | val->strval = battery->model_number; | |
180 | break; | |
181 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
182 | val->strval = battery->oem_info; | |
183 | break; | |
184 | default: | |
185 | return -EINVAL; | |
186 | } | |
187 | return 0; | |
188 | } | |
189 | ||
190 | static enum power_supply_property charge_battery_props[] = { | |
191 | POWER_SUPPLY_PROP_STATUS, | |
192 | POWER_SUPPLY_PROP_PRESENT, | |
193 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
194 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
195 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
196 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
197 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
198 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
199 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
200 | POWER_SUPPLY_PROP_MODEL_NAME, | |
201 | POWER_SUPPLY_PROP_MANUFACTURER, | |
202 | }; | |
203 | ||
204 | static enum power_supply_property energy_battery_props[] = { | |
205 | POWER_SUPPLY_PROP_STATUS, | |
206 | POWER_SUPPLY_PROP_PRESENT, | |
207 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
208 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
209 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
210 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
211 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, | |
212 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
213 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
214 | POWER_SUPPLY_PROP_MODEL_NAME, | |
215 | POWER_SUPPLY_PROP_MANUFACTURER, | |
216 | }; | |
217 | ||
218 | #ifdef CONFIG_ACPI_PROCFS | |
f1d4661a | 219 | inline char *acpi_battery_units(struct acpi_battery *battery) |
78490d82 | 220 | { |
f1d4661a | 221 | return (battery->power_unit)?"mA":"mW"; |
b6ce4083 | 222 | } |
d7380965 | 223 | #endif |
b6ce4083 | 224 | |
78490d82 AS |
225 | /* -------------------------------------------------------------------------- |
226 | Battery Management | |
227 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
228 | struct acpi_offsets { |
229 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
230 | u8 mode; /* int or string? */ | |
231 | }; | |
b6ce4083 | 232 | |
038fdea2 AS |
233 | static struct acpi_offsets state_offsets[] = { |
234 | {offsetof(struct acpi_battery, state), 0}, | |
d7380965 AS |
235 | {offsetof(struct acpi_battery, current_now), 0}, |
236 | {offsetof(struct acpi_battery, capacity_now), 0}, | |
237 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 238 | }; |
b6ce4083 | 239 | |
038fdea2 AS |
240 | static struct acpi_offsets info_offsets[] = { |
241 | {offsetof(struct acpi_battery, power_unit), 0}, | |
242 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 243 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
244 | {offsetof(struct acpi_battery, technology), 0}, |
245 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
246 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
247 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
248 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
249 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
250 | {offsetof(struct acpi_battery, model_number), 1}, | |
251 | {offsetof(struct acpi_battery, serial_number), 1}, | |
252 | {offsetof(struct acpi_battery, type), 1}, | |
253 | {offsetof(struct acpi_battery, oem_info), 1}, | |
254 | }; | |
b6ce4083 | 255 | |
038fdea2 AS |
256 | static int extract_package(struct acpi_battery *battery, |
257 | union acpi_object *package, | |
258 | struct acpi_offsets *offsets, int num) | |
259 | { | |
260 | int i, *x; | |
261 | union acpi_object *element; | |
262 | if (package->type != ACPI_TYPE_PACKAGE) | |
263 | return -EFAULT; | |
264 | for (i = 0; i < num; ++i) { | |
265 | if (package->package.count <= i) | |
266 | return -EFAULT; | |
267 | element = &package->package.elements[i]; | |
268 | if (offsets[i].mode) { | |
269 | if (element->type != ACPI_TYPE_STRING && | |
270 | element->type != ACPI_TYPE_BUFFER) | |
271 | return -EFAULT; | |
272 | strncpy((u8 *)battery + offsets[i].offset, | |
273 | element->string.pointer, 32); | |
274 | } else { | |
275 | if (element->type != ACPI_TYPE_INTEGER) | |
276 | return -EFAULT; | |
277 | x = (int *)((u8 *)battery + offsets[i].offset); | |
278 | *x = element->integer.value; | |
279 | } | |
b6ce4083 | 280 | } |
b6ce4083 VL |
281 | return 0; |
282 | } | |
283 | ||
284 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
285 | { | |
aa650bbd | 286 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
287 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
288 | return -ENODEV; | |
289 | } | |
aa650bbd | 290 | return 0; |
b6ce4083 VL |
291 | } |
292 | ||
293 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 294 | { |
aa650bbd | 295 | int result = -EFAULT; |
4be44fcd LB |
296 | acpi_status status = 0; |
297 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 298 | |
b6ce4083 VL |
299 | if (!acpi_battery_present(battery)) |
300 | return 0; | |
038fdea2 | 301 | mutex_lock(&battery->lock); |
f1d4661a | 302 | status = acpi_evaluate_object(battery->device->handle, "_BIF", |
038fdea2 AS |
303 | NULL, &buffer); |
304 | mutex_unlock(&battery->lock); | |
aa650bbd | 305 | |
1da177e4 | 306 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 307 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
d550d98d | 308 | return -ENODEV; |
1da177e4 | 309 | } |
aa650bbd | 310 | |
038fdea2 AS |
311 | result = extract_package(battery, buffer.pointer, |
312 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 313 | kfree(buffer.pointer); |
d550d98d | 314 | return result; |
1da177e4 LT |
315 | } |
316 | ||
b6ce4083 | 317 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 318 | { |
4be44fcd LB |
319 | int result = 0; |
320 | acpi_status status = 0; | |
321 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 322 | |
b6ce4083 VL |
323 | if (!acpi_battery_present(battery)) |
324 | return 0; | |
1da177e4 | 325 | |
f1d4661a AS |
326 | if (battery->update_time && |
327 | time_before(jiffies, battery->update_time + | |
328 | msecs_to_jiffies(cache_time))) | |
329 | return 0; | |
330 | ||
038fdea2 | 331 | mutex_lock(&battery->lock); |
f1d4661a | 332 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
333 | NULL, &buffer); |
334 | mutex_unlock(&battery->lock); | |
5b31d895 | 335 | |
1da177e4 | 336 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 337 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 338 | return -ENODEV; |
1da177e4 | 339 | } |
aa650bbd | 340 | |
038fdea2 AS |
341 | result = extract_package(battery, buffer.pointer, |
342 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 343 | battery->update_time = jiffies; |
78490d82 | 344 | kfree(buffer.pointer); |
b6ce4083 VL |
345 | return result; |
346 | } | |
1da177e4 | 347 | |
aa650bbd | 348 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 349 | { |
4be44fcd | 350 | acpi_status status = 0; |
aa650bbd | 351 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
4be44fcd | 352 | struct acpi_object_list arg_list = { 1, &arg0 }; |
1da177e4 | 353 | |
aa650bbd | 354 | if (!acpi_battery_present(battery)|| !battery->alarm_present) |
d550d98d | 355 | return -ENODEV; |
1da177e4 | 356 | |
aa650bbd | 357 | arg0.integer.value = battery->alarm; |
1da177e4 | 358 | |
038fdea2 | 359 | mutex_lock(&battery->lock); |
f1d4661a AS |
360 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
361 | &arg_list, NULL); | |
038fdea2 | 362 | mutex_unlock(&battery->lock); |
aa650bbd | 363 | |
1da177e4 | 364 | if (ACPI_FAILURE(status)) |
d550d98d | 365 | return -ENODEV; |
1da177e4 | 366 | |
aa650bbd | 367 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 368 | return 0; |
1da177e4 LT |
369 | } |
370 | ||
b6ce4083 | 371 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 372 | { |
4be44fcd LB |
373 | acpi_status status = AE_OK; |
374 | acpi_handle handle = NULL; | |
4be44fcd | 375 | |
b6ce4083 | 376 | /* See if alarms are supported, and if so, set default */ |
f1d4661a AS |
377 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
378 | if (ACPI_FAILURE(status)) { | |
038fdea2 | 379 | battery->alarm_present = 0; |
f1d4661a | 380 | return 0; |
b6ce4083 | 381 | } |
f1d4661a AS |
382 | battery->alarm_present = 1; |
383 | if (!battery->alarm) | |
384 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 385 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 386 | } |
1da177e4 | 387 | |
f1d4661a | 388 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 389 | { |
f1d4661a AS |
390 | int saved_present = acpi_battery_present(battery); |
391 | int result = acpi_battery_get_status(battery); | |
392 | if (result || !acpi_battery_present(battery)) | |
b6ce4083 | 393 | return result; |
f1d4661a AS |
394 | if (saved_present != acpi_battery_present(battery) || |
395 | !battery->update_time) { | |
396 | battery->update_time = 0; | |
b6ce4083 VL |
397 | result = acpi_battery_get_info(battery); |
398 | if (result) | |
399 | return result; | |
d7380965 AS |
400 | if (battery->power_unit) { |
401 | battery->bat.properties = charge_battery_props; | |
402 | battery->bat.num_properties = | |
403 | ARRAY_SIZE(charge_battery_props); | |
404 | } else { | |
405 | battery->bat.properties = energy_battery_props; | |
406 | battery->bat.num_properties = | |
407 | ARRAY_SIZE(energy_battery_props); | |
408 | } | |
b6ce4083 VL |
409 | acpi_battery_init_alarm(battery); |
410 | } | |
f1d4661a | 411 | return acpi_battery_get_state(battery); |
4bd35cdb VL |
412 | } |
413 | ||
1da177e4 LT |
414 | /* -------------------------------------------------------------------------- |
415 | FS Interface (/proc) | |
416 | -------------------------------------------------------------------------- */ | |
417 | ||
d7380965 | 418 | #ifdef CONFIG_ACPI_PROCFS |
4be44fcd | 419 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 420 | |
78490d82 | 421 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 422 | { |
50dd0969 | 423 | struct acpi_battery *battery = seq->private; |
1da177e4 | 424 | |
b6ce4083 | 425 | if (result) |
1da177e4 LT |
426 | goto end; |
427 | ||
aa650bbd AS |
428 | seq_printf(seq, "present: %s\n", |
429 | acpi_battery_present(battery)?"yes":"no"); | |
430 | if (!acpi_battery_present(battery)) | |
1da177e4 | 431 | goto end; |
038fdea2 | 432 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
433 | seq_printf(seq, "design capacity: unknown\n"); |
434 | else | |
435 | seq_printf(seq, "design capacity: %d %sh\n", | |
aa650bbd AS |
436 | battery->design_capacity, |
437 | acpi_battery_units(battery)); | |
1da177e4 | 438 | |
d7380965 | 439 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
440 | seq_printf(seq, "last full capacity: unknown\n"); |
441 | else | |
442 | seq_printf(seq, "last full capacity: %d %sh\n", | |
d7380965 | 443 | battery->full_charge_capacity, |
aa650bbd AS |
444 | acpi_battery_units(battery)); |
445 | ||
446 | seq_printf(seq, "battery technology: %srechargeable\n", | |
447 | (!battery->technology)?"non-":""); | |
1da177e4 | 448 | |
038fdea2 | 449 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
450 | seq_printf(seq, "design voltage: unknown\n"); |
451 | else | |
452 | seq_printf(seq, "design voltage: %d mV\n", | |
aa650bbd | 453 | battery->design_voltage); |
1da177e4 | 454 | seq_printf(seq, "design capacity warning: %d %sh\n", |
aa650bbd AS |
455 | battery->design_capacity_warning, |
456 | acpi_battery_units(battery)); | |
1da177e4 | 457 | seq_printf(seq, "design capacity low: %d %sh\n", |
aa650bbd AS |
458 | battery->design_capacity_low, |
459 | acpi_battery_units(battery)); | |
1da177e4 | 460 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
aa650bbd AS |
461 | battery->capacity_granularity_1, |
462 | acpi_battery_units(battery)); | |
1da177e4 | 463 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
aa650bbd AS |
464 | battery->capacity_granularity_2, |
465 | acpi_battery_units(battery)); | |
038fdea2 AS |
466 | seq_printf(seq, "model number: %s\n", battery->model_number); |
467 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
468 | seq_printf(seq, "battery type: %s\n", battery->type); | |
469 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
4be44fcd | 470 | end: |
b6ce4083 VL |
471 | if (result) |
472 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
b6ce4083 VL |
473 | return result; |
474 | } | |
475 | ||
78490d82 | 476 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
1da177e4 | 477 | { |
50dd0969 | 478 | struct acpi_battery *battery = seq->private; |
1da177e4 | 479 | |
b6ce4083 | 480 | if (result) |
1da177e4 LT |
481 | goto end; |
482 | ||
aa650bbd AS |
483 | seq_printf(seq, "present: %s\n", |
484 | acpi_battery_present(battery)?"yes":"no"); | |
485 | if (!acpi_battery_present(battery)) | |
1da177e4 | 486 | goto end; |
b6ce4083 | 487 | |
aa650bbd AS |
488 | seq_printf(seq, "capacity state: %s\n", |
489 | (battery->state & 0x04)?"critical":"ok"); | |
490 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
4be44fcd LB |
491 | seq_printf(seq, |
492 | "charging state: charging/discharging\n"); | |
aa650bbd | 493 | else if (battery->state & 0x01) |
1da177e4 | 494 | seq_printf(seq, "charging state: discharging\n"); |
038fdea2 | 495 | else if (battery->state & 0x02) |
1da177e4 | 496 | seq_printf(seq, "charging state: charging\n"); |
aa650bbd | 497 | else |
1da177e4 | 498 | seq_printf(seq, "charging state: charged\n"); |
1da177e4 | 499 | |
d7380965 | 500 | if (battery->current_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
501 | seq_printf(seq, "present rate: unknown\n"); |
502 | else | |
503 | seq_printf(seq, "present rate: %d %s\n", | |
d7380965 | 504 | battery->current_now, acpi_battery_units(battery)); |
1da177e4 | 505 | |
d7380965 | 506 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
507 | seq_printf(seq, "remaining capacity: unknown\n"); |
508 | else | |
509 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
d7380965 AS |
510 | battery->capacity_now, acpi_battery_units(battery)); |
511 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 LT |
512 | seq_printf(seq, "present voltage: unknown\n"); |
513 | else | |
514 | seq_printf(seq, "present voltage: %d mV\n", | |
d7380965 | 515 | battery->voltage_now); |
4be44fcd | 516 | end: |
aa650bbd | 517 | if (result) |
b6ce4083 | 518 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
b6ce4083 VL |
519 | |
520 | return result; | |
521 | } | |
522 | ||
78490d82 | 523 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 524 | { |
50dd0969 | 525 | struct acpi_battery *battery = seq->private; |
1da177e4 | 526 | |
b6ce4083 | 527 | if (result) |
1da177e4 LT |
528 | goto end; |
529 | ||
b6ce4083 | 530 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
531 | seq_printf(seq, "present: no\n"); |
532 | goto end; | |
533 | } | |
1da177e4 LT |
534 | seq_printf(seq, "alarm: "); |
535 | if (!battery->alarm) | |
536 | seq_printf(seq, "unsupported\n"); | |
537 | else | |
aa650bbd AS |
538 | seq_printf(seq, "%u %sh\n", battery->alarm, |
539 | acpi_battery_units(battery)); | |
4be44fcd | 540 | end: |
b6ce4083 VL |
541 | if (result) |
542 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
b6ce4083 VL |
543 | return result; |
544 | } | |
545 | ||
f1d4661a AS |
546 | static ssize_t acpi_battery_write_alarm(struct file *file, |
547 | const char __user * buffer, | |
548 | size_t count, loff_t * ppos) | |
1da177e4 | 549 | { |
4be44fcd LB |
550 | int result = 0; |
551 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
552 | struct seq_file *m = file->private_data; |
553 | struct acpi_battery *battery = m->private; | |
1da177e4 | 554 | |
1da177e4 | 555 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 556 | return -EINVAL; |
b6ce4083 VL |
557 | if (result) { |
558 | result = -ENODEV; | |
559 | goto end; | |
560 | } | |
b6ce4083 VL |
561 | if (!acpi_battery_present(battery)) { |
562 | result = -ENODEV; | |
563 | goto end; | |
564 | } | |
b6ce4083 VL |
565 | if (copy_from_user(alarm_string, buffer, count)) { |
566 | result = -EFAULT; | |
567 | goto end; | |
568 | } | |
1da177e4 | 569 | alarm_string[count] = '\0'; |
f1d4661a | 570 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
aa650bbd | 571 | result = acpi_battery_set_alarm(battery); |
b6ce4083 | 572 | end: |
b6ce4083 | 573 | if (!result) |
f1d4661a | 574 | return count; |
78490d82 AS |
575 | return result; |
576 | } | |
577 | ||
578 | typedef int(*print_func)(struct seq_file *seq, int result); | |
aa650bbd AS |
579 | |
580 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
581 | acpi_battery_print_info, | |
582 | acpi_battery_print_state, | |
583 | acpi_battery_print_alarm, | |
78490d82 | 584 | }; |
b6ce4083 | 585 | |
78490d82 AS |
586 | static int acpi_battery_read(int fid, struct seq_file *seq) |
587 | { | |
588 | struct acpi_battery *battery = seq->private; | |
f1d4661a | 589 | int result = acpi_battery_update(battery); |
aa650bbd | 590 | return acpi_print_funcs[fid](seq, result); |
78490d82 AS |
591 | } |
592 | ||
aa650bbd AS |
593 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
594 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
595 | { \ | |
596 | return acpi_battery_read(_name##_tag, seq); \ | |
597 | } \ | |
598 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
599 | { \ | |
600 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ | |
78490d82 AS |
601 | } |
602 | ||
aa650bbd AS |
603 | DECLARE_FILE_FUNCTIONS(info); |
604 | DECLARE_FILE_FUNCTIONS(state); | |
605 | DECLARE_FILE_FUNCTIONS(alarm); | |
606 | ||
607 | #undef DECLARE_FILE_FUNCTIONS | |
608 | ||
609 | #define FILE_DESCRIPTION_RO(_name) \ | |
610 | { \ | |
611 | .name = __stringify(_name), \ | |
612 | .mode = S_IRUGO, \ | |
613 | .ops = { \ | |
614 | .open = acpi_battery_##_name##_open_fs, \ | |
615 | .read = seq_read, \ | |
616 | .llseek = seq_lseek, \ | |
617 | .release = single_release, \ | |
618 | .owner = THIS_MODULE, \ | |
619 | }, \ | |
620 | } | |
78490d82 | 621 | |
aa650bbd AS |
622 | #define FILE_DESCRIPTION_RW(_name) \ |
623 | { \ | |
624 | .name = __stringify(_name), \ | |
625 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
626 | .ops = { \ | |
627 | .open = acpi_battery_##_name##_open_fs, \ | |
628 | .read = seq_read, \ | |
629 | .llseek = seq_lseek, \ | |
630 | .write = acpi_battery_write_##_name, \ | |
631 | .release = single_release, \ | |
632 | .owner = THIS_MODULE, \ | |
633 | }, \ | |
634 | } | |
1da177e4 | 635 | |
78490d82 AS |
636 | static struct battery_file { |
637 | struct file_operations ops; | |
638 | mode_t mode; | |
639 | char *name; | |
640 | } acpi_battery_file[] = { | |
aa650bbd AS |
641 | FILE_DESCRIPTION_RO(info), |
642 | FILE_DESCRIPTION_RO(state), | |
643 | FILE_DESCRIPTION_RW(alarm), | |
1da177e4 LT |
644 | }; |
645 | ||
aa650bbd AS |
646 | #undef FILE_DESCRIPTION_RO |
647 | #undef FILE_DESCRIPTION_RW | |
648 | ||
4be44fcd | 649 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 650 | { |
4be44fcd | 651 | struct proc_dir_entry *entry = NULL; |
78490d82 | 652 | int i; |
1da177e4 | 653 | |
1da177e4 LT |
654 | if (!acpi_device_dir(device)) { |
655 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 656 | acpi_battery_dir); |
1da177e4 | 657 | if (!acpi_device_dir(device)) |
d550d98d | 658 | return -ENODEV; |
1da177e4 LT |
659 | acpi_device_dir(device)->owner = THIS_MODULE; |
660 | } | |
661 | ||
78490d82 AS |
662 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
663 | entry = create_proc_entry(acpi_battery_file[i].name, | |
664 | acpi_battery_file[i].mode, acpi_device_dir(device)); | |
665 | if (!entry) | |
666 | return -ENODEV; | |
667 | else { | |
668 | entry->proc_fops = &acpi_battery_file[i].ops; | |
669 | entry->data = acpi_driver_data(device); | |
670 | entry->owner = THIS_MODULE; | |
671 | } | |
1da177e4 | 672 | } |
d550d98d | 673 | return 0; |
1da177e4 LT |
674 | } |
675 | ||
aa650bbd | 676 | static void acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 677 | { |
78490d82 | 678 | int i; |
aa650bbd AS |
679 | if (!acpi_device_dir(device)) |
680 | return; | |
681 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
682 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 683 | acpi_device_dir(device)); |
1da177e4 | 684 | |
aa650bbd AS |
685 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
686 | acpi_device_dir(device) = NULL; | |
1da177e4 LT |
687 | } |
688 | ||
d7380965 | 689 | #endif |
1da177e4 LT |
690 | /* -------------------------------------------------------------------------- |
691 | Driver Interface | |
692 | -------------------------------------------------------------------------- */ | |
693 | ||
4be44fcd | 694 | static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 695 | { |
50dd0969 | 696 | struct acpi_battery *battery = data; |
f1d4661a | 697 | struct acpi_device *device; |
1da177e4 | 698 | if (!battery) |
d550d98d | 699 | return; |
145def84 | 700 | device = battery->device; |
f1d4661a AS |
701 | acpi_battery_update(battery); |
702 | acpi_bus_generate_proc_event(device, event, | |
703 | acpi_battery_present(battery)); | |
704 | acpi_bus_generate_netlink_event(device->pnp.device_class, | |
705 | device->dev.bus_id, event, | |
9ea7d575 | 706 | acpi_battery_present(battery)); |
d7380965 | 707 | kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE); |
1da177e4 LT |
708 | } |
709 | ||
4be44fcd | 710 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 711 | { |
4be44fcd LB |
712 | int result = 0; |
713 | acpi_status status = 0; | |
714 | struct acpi_battery *battery = NULL; | |
1da177e4 | 715 | if (!device) |
d550d98d | 716 | return -EINVAL; |
36bcbec7 | 717 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 718 | if (!battery) |
d550d98d | 719 | return -ENOMEM; |
145def84 | 720 | battery->device = device; |
1da177e4 LT |
721 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
722 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
723 | acpi_driver_data(device) = battery; | |
038fdea2 | 724 | mutex_init(&battery->lock); |
f1d4661a | 725 | acpi_battery_update(battery); |
d7380965 | 726 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 LT |
727 | result = acpi_battery_add_fs(device); |
728 | if (result) | |
729 | goto end; | |
d7380965 AS |
730 | #endif |
731 | battery->bat.name = acpi_device_bid(device); | |
732 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
733 | battery->bat.get_property = acpi_battery_get_property; | |
734 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
3b073ec3 | 735 | status = acpi_install_notify_handler(device->handle, |
9fdae727 | 736 | ACPI_ALL_NOTIFY, |
4be44fcd | 737 | acpi_battery_notify, battery); |
1da177e4 | 738 | if (ACPI_FAILURE(status)) { |
b6ce4083 | 739 | ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler")); |
1da177e4 LT |
740 | result = -ENODEV; |
741 | goto end; | |
742 | } | |
1da177e4 | 743 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
4be44fcd LB |
744 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
745 | device->status.battery_present ? "present" : "absent"); | |
4be44fcd | 746 | end: |
1da177e4 | 747 | if (result) { |
d7380965 | 748 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 | 749 | acpi_battery_remove_fs(device); |
d7380965 | 750 | #endif |
1da177e4 LT |
751 | kfree(battery); |
752 | } | |
d550d98d | 753 | return result; |
1da177e4 LT |
754 | } |
755 | ||
4be44fcd | 756 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 757 | { |
4be44fcd LB |
758 | acpi_status status = 0; |
759 | struct acpi_battery *battery = NULL; | |
1da177e4 | 760 | |
1da177e4 | 761 | if (!device || !acpi_driver_data(device)) |
d550d98d | 762 | return -EINVAL; |
50dd0969 | 763 | battery = acpi_driver_data(device); |
3b073ec3 | 764 | status = acpi_remove_notify_handler(device->handle, |
9fdae727 | 765 | ACPI_ALL_NOTIFY, |
4be44fcd | 766 | acpi_battery_notify); |
d7380965 | 767 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 | 768 | acpi_battery_remove_fs(device); |
d7380965 AS |
769 | #endif |
770 | if (battery->bat.dev) | |
771 | power_supply_unregister(&battery->bat); | |
038fdea2 | 772 | mutex_destroy(&battery->lock); |
1da177e4 | 773 | kfree(battery); |
d550d98d | 774 | return 0; |
1da177e4 LT |
775 | } |
776 | ||
34c4415a | 777 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 778 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
779 | { |
780 | struct acpi_battery *battery; | |
34c4415a JK |
781 | if (!device) |
782 | return -EINVAL; | |
f1d4661a AS |
783 | battery = acpi_driver_data(device); |
784 | battery->update_time = 0; | |
b6ce4083 | 785 | return 0; |
34c4415a JK |
786 | } |
787 | ||
aa650bbd AS |
788 | static struct acpi_driver acpi_battery_driver = { |
789 | .name = "battery", | |
790 | .class = ACPI_BATTERY_CLASS, | |
791 | .ids = battery_device_ids, | |
792 | .ops = { | |
793 | .add = acpi_battery_add, | |
794 | .resume = acpi_battery_resume, | |
795 | .remove = acpi_battery_remove, | |
796 | }, | |
797 | }; | |
798 | ||
4be44fcd | 799 | static int __init acpi_battery_init(void) |
1da177e4 | 800 | { |
4d8316d5 PM |
801 | if (acpi_disabled) |
802 | return -ENODEV; | |
d7380965 | 803 | #ifdef CONFIG_ACPI_PROCFS |
3f86b832 | 804 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 805 | if (!acpi_battery_dir) |
d550d98d | 806 | return -ENODEV; |
d7380965 | 807 | #endif |
aa650bbd | 808 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
d7380965 | 809 | #ifdef CONFIG_ACPI_PROCFS |
3f86b832 | 810 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 811 | #endif |
d550d98d | 812 | return -ENODEV; |
1da177e4 | 813 | } |
d550d98d | 814 | return 0; |
1da177e4 LT |
815 | } |
816 | ||
4be44fcd | 817 | static void __exit acpi_battery_exit(void) |
1da177e4 | 818 | { |
1da177e4 | 819 | acpi_bus_unregister_driver(&acpi_battery_driver); |
d7380965 | 820 | #ifdef CONFIG_ACPI_PROCFS |
3f86b832 | 821 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 822 | #endif |
1da177e4 LT |
823 | } |
824 | ||
1da177e4 LT |
825 | module_init(acpi_battery_init); |
826 | module_exit(acpi_battery_exit); |