Commit | Line | Data |
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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> |
d7380965 | 33 | |
fdcedbba | 34 | #ifdef CONFIG_ACPI_PROCFS_POWER |
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 | |
fdcedbba | 66 | #ifdef CONFIG_ACPI_PROCFS_POWER |
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; | |
0bde7eee AS |
128 | if (!strcasecmp("LI-ION", battery->type)) |
129 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
d7380965 AS |
130 | if (!strcasecmp("LiP", battery->type)) |
131 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
132 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
133 | } | |
134 | ||
9104476e | 135 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 136 | |
d7380965 AS |
137 | static int acpi_battery_get_property(struct power_supply *psy, |
138 | enum power_supply_property psp, | |
139 | union power_supply_propval *val) | |
140 | { | |
141 | struct acpi_battery *battery = to_acpi_battery(psy); | |
142 | ||
9104476e AS |
143 | if (acpi_battery_present(battery)) { |
144 | /* run battery update only if it is present */ | |
145 | acpi_battery_get_state(battery); | |
146 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
147 | return -ENODEV; |
148 | switch (psp) { | |
149 | case POWER_SUPPLY_PROP_STATUS: | |
150 | if (battery->state & 0x01) | |
151 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
152 | else if (battery->state & 0x02) | |
153 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
154 | else if (battery->state == 0) | |
155 | val->intval = POWER_SUPPLY_STATUS_FULL; | |
4c41d3ad RD |
156 | else |
157 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
158 | break; |
159 | case POWER_SUPPLY_PROP_PRESENT: | |
160 | val->intval = acpi_battery_present(battery); | |
161 | break; | |
162 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
163 | val->intval = acpi_battery_technology(battery); | |
164 | break; | |
165 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
166 | val->intval = battery->design_voltage * 1000; | |
167 | break; | |
168 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
169 | val->intval = battery->voltage_now * 1000; | |
170 | break; | |
171 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
172 | val->intval = battery->current_now * 1000; | |
173 | break; | |
174 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
175 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
176 | val->intval = battery->design_capacity * 1000; | |
177 | break; | |
178 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
179 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
180 | val->intval = battery->full_charge_capacity * 1000; | |
181 | break; | |
182 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
183 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
184 | val->intval = battery->capacity_now * 1000; | |
185 | break; | |
186 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
187 | val->strval = battery->model_number; | |
188 | break; | |
189 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
190 | val->strval = battery->oem_info; | |
191 | break; | |
192 | default: | |
193 | return -EINVAL; | |
194 | } | |
195 | return 0; | |
196 | } | |
197 | ||
198 | static enum power_supply_property charge_battery_props[] = { | |
199 | POWER_SUPPLY_PROP_STATUS, | |
200 | POWER_SUPPLY_PROP_PRESENT, | |
201 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
202 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
203 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
204 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
205 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
206 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
207 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
208 | POWER_SUPPLY_PROP_MODEL_NAME, | |
209 | POWER_SUPPLY_PROP_MANUFACTURER, | |
210 | }; | |
211 | ||
212 | static enum power_supply_property energy_battery_props[] = { | |
213 | POWER_SUPPLY_PROP_STATUS, | |
214 | POWER_SUPPLY_PROP_PRESENT, | |
215 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
216 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
217 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
218 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
219 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, | |
220 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
221 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
222 | POWER_SUPPLY_PROP_MODEL_NAME, | |
223 | POWER_SUPPLY_PROP_MANUFACTURER, | |
224 | }; | |
225 | ||
fdcedbba | 226 | #ifdef CONFIG_ACPI_PROCFS_POWER |
f1d4661a | 227 | inline char *acpi_battery_units(struct acpi_battery *battery) |
78490d82 | 228 | { |
f1d4661a | 229 | return (battery->power_unit)?"mA":"mW"; |
b6ce4083 | 230 | } |
d7380965 | 231 | #endif |
b6ce4083 | 232 | |
78490d82 AS |
233 | /* -------------------------------------------------------------------------- |
234 | Battery Management | |
235 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
236 | struct acpi_offsets { |
237 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
238 | u8 mode; /* int or string? */ | |
239 | }; | |
b6ce4083 | 240 | |
038fdea2 AS |
241 | static struct acpi_offsets state_offsets[] = { |
242 | {offsetof(struct acpi_battery, state), 0}, | |
d7380965 AS |
243 | {offsetof(struct acpi_battery, current_now), 0}, |
244 | {offsetof(struct acpi_battery, capacity_now), 0}, | |
245 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 246 | }; |
b6ce4083 | 247 | |
038fdea2 AS |
248 | static struct acpi_offsets info_offsets[] = { |
249 | {offsetof(struct acpi_battery, power_unit), 0}, | |
250 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 251 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
252 | {offsetof(struct acpi_battery, technology), 0}, |
253 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
254 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
255 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
256 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
257 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
258 | {offsetof(struct acpi_battery, model_number), 1}, | |
259 | {offsetof(struct acpi_battery, serial_number), 1}, | |
260 | {offsetof(struct acpi_battery, type), 1}, | |
261 | {offsetof(struct acpi_battery, oem_info), 1}, | |
262 | }; | |
b6ce4083 | 263 | |
038fdea2 AS |
264 | static int extract_package(struct acpi_battery *battery, |
265 | union acpi_object *package, | |
266 | struct acpi_offsets *offsets, int num) | |
267 | { | |
106449e8 | 268 | int i; |
038fdea2 AS |
269 | union acpi_object *element; |
270 | if (package->type != ACPI_TYPE_PACKAGE) | |
271 | return -EFAULT; | |
272 | for (i = 0; i < num; ++i) { | |
273 | if (package->package.count <= i) | |
274 | return -EFAULT; | |
275 | element = &package->package.elements[i]; | |
276 | if (offsets[i].mode) { | |
106449e8 AS |
277 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
278 | if (element->type == ACPI_TYPE_STRING || | |
279 | element->type == ACPI_TYPE_BUFFER) | |
280 | strncpy(ptr, element->string.pointer, 32); | |
281 | else if (element->type == ACPI_TYPE_INTEGER) { | |
282 | strncpy(ptr, (u8 *)&element->integer.value, | |
283 | sizeof(acpi_integer)); | |
284 | ptr[sizeof(acpi_integer)] = 0; | |
285 | } else return -EFAULT; | |
038fdea2 | 286 | } else { |
106449e8 AS |
287 | if (element->type == ACPI_TYPE_INTEGER) { |
288 | int *x = (int *)((u8 *)battery + | |
289 | offsets[i].offset); | |
290 | *x = element->integer.value; | |
291 | } else return -EFAULT; | |
038fdea2 | 292 | } |
b6ce4083 | 293 | } |
b6ce4083 VL |
294 | return 0; |
295 | } | |
296 | ||
297 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
298 | { | |
aa650bbd | 299 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
300 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
301 | return -ENODEV; | |
302 | } | |
aa650bbd | 303 | return 0; |
b6ce4083 VL |
304 | } |
305 | ||
306 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 307 | { |
aa650bbd | 308 | int result = -EFAULT; |
4be44fcd LB |
309 | acpi_status status = 0; |
310 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 311 | |
b6ce4083 VL |
312 | if (!acpi_battery_present(battery)) |
313 | return 0; | |
038fdea2 | 314 | mutex_lock(&battery->lock); |
f1d4661a | 315 | status = acpi_evaluate_object(battery->device->handle, "_BIF", |
038fdea2 AS |
316 | NULL, &buffer); |
317 | mutex_unlock(&battery->lock); | |
aa650bbd | 318 | |
1da177e4 | 319 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 320 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
d550d98d | 321 | return -ENODEV; |
1da177e4 | 322 | } |
aa650bbd | 323 | |
038fdea2 AS |
324 | result = extract_package(battery, buffer.pointer, |
325 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 326 | kfree(buffer.pointer); |
d550d98d | 327 | return result; |
1da177e4 LT |
328 | } |
329 | ||
b6ce4083 | 330 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 331 | { |
4be44fcd LB |
332 | int result = 0; |
333 | acpi_status status = 0; | |
334 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 335 | |
b6ce4083 VL |
336 | if (!acpi_battery_present(battery)) |
337 | return 0; | |
1da177e4 | 338 | |
f1d4661a AS |
339 | if (battery->update_time && |
340 | time_before(jiffies, battery->update_time + | |
341 | msecs_to_jiffies(cache_time))) | |
342 | return 0; | |
343 | ||
038fdea2 | 344 | mutex_lock(&battery->lock); |
f1d4661a | 345 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
346 | NULL, &buffer); |
347 | mutex_unlock(&battery->lock); | |
5b31d895 | 348 | |
1da177e4 | 349 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 350 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 351 | return -ENODEV; |
1da177e4 | 352 | } |
aa650bbd | 353 | |
038fdea2 AS |
354 | result = extract_package(battery, buffer.pointer, |
355 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 356 | battery->update_time = jiffies; |
78490d82 | 357 | kfree(buffer.pointer); |
b6ce4083 VL |
358 | return result; |
359 | } | |
1da177e4 | 360 | |
aa650bbd | 361 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 362 | { |
4be44fcd | 363 | acpi_status status = 0; |
aa650bbd | 364 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
4be44fcd | 365 | struct acpi_object_list arg_list = { 1, &arg0 }; |
1da177e4 | 366 | |
aa650bbd | 367 | if (!acpi_battery_present(battery)|| !battery->alarm_present) |
d550d98d | 368 | return -ENODEV; |
1da177e4 | 369 | |
aa650bbd | 370 | arg0.integer.value = battery->alarm; |
1da177e4 | 371 | |
038fdea2 | 372 | mutex_lock(&battery->lock); |
f1d4661a AS |
373 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
374 | &arg_list, NULL); | |
038fdea2 | 375 | mutex_unlock(&battery->lock); |
aa650bbd | 376 | |
1da177e4 | 377 | if (ACPI_FAILURE(status)) |
d550d98d | 378 | return -ENODEV; |
1da177e4 | 379 | |
aa650bbd | 380 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 381 | return 0; |
1da177e4 LT |
382 | } |
383 | ||
b6ce4083 | 384 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 385 | { |
4be44fcd LB |
386 | acpi_status status = AE_OK; |
387 | acpi_handle handle = NULL; | |
4be44fcd | 388 | |
b6ce4083 | 389 | /* See if alarms are supported, and if so, set default */ |
f1d4661a AS |
390 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
391 | if (ACPI_FAILURE(status)) { | |
038fdea2 | 392 | battery->alarm_present = 0; |
f1d4661a | 393 | return 0; |
b6ce4083 | 394 | } |
f1d4661a AS |
395 | battery->alarm_present = 1; |
396 | if (!battery->alarm) | |
397 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 398 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 399 | } |
1da177e4 | 400 | |
508df92d AB |
401 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
402 | struct device_attribute *attr, | |
403 | char *buf) | |
404 | { | |
405 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
406 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
407 | } | |
408 | ||
409 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
410 | struct device_attribute *attr, | |
411 | const char *buf, size_t count) | |
412 | { | |
413 | unsigned long x; | |
414 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
415 | if (sscanf(buf, "%ld\n", &x) == 1) | |
416 | battery->alarm = x/1000; | |
417 | if (acpi_battery_present(battery)) | |
418 | acpi_battery_set_alarm(battery); | |
419 | return count; | |
420 | } | |
421 | ||
422 | static struct device_attribute alarm_attr = { | |
423 | .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE}, | |
424 | .show = acpi_battery_alarm_show, | |
425 | .store = acpi_battery_alarm_store, | |
426 | }; | |
427 | ||
428 | static int sysfs_add_battery(struct acpi_battery *battery) | |
429 | { | |
430 | int result; | |
431 | ||
432 | battery->update_time = 0; | |
433 | result = acpi_battery_get_info(battery); | |
434 | acpi_battery_init_alarm(battery); | |
435 | if (result) | |
436 | return result; | |
437 | if (battery->power_unit) { | |
438 | battery->bat.properties = charge_battery_props; | |
439 | battery->bat.num_properties = | |
440 | ARRAY_SIZE(charge_battery_props); | |
441 | } else { | |
442 | battery->bat.properties = energy_battery_props; | |
443 | battery->bat.num_properties = | |
444 | ARRAY_SIZE(energy_battery_props); | |
445 | } | |
446 | ||
447 | battery->bat.name = acpi_device_bid(battery->device); | |
448 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
449 | battery->bat.get_property = acpi_battery_get_property; | |
450 | ||
451 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
452 | if (result) | |
453 | return result; | |
454 | return device_create_file(battery->bat.dev, &alarm_attr); | |
455 | } | |
456 | ||
457 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
458 | { | |
459 | if (!battery->bat.dev) | |
460 | return; | |
461 | device_remove_file(battery->bat.dev, &alarm_attr); | |
462 | power_supply_unregister(&battery->bat); | |
9104476e | 463 | battery->bat.dev = NULL; |
508df92d AB |
464 | } |
465 | ||
f1d4661a | 466 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 467 | { |
f1d4661a | 468 | int result = acpi_battery_get_status(battery); |
508df92d | 469 | if (result) |
b6ce4083 | 470 | return result; |
508df92d AB |
471 | if (!acpi_battery_present(battery)) { |
472 | sysfs_remove_battery(battery); | |
473 | return 0; | |
b6ce4083 | 474 | } |
508df92d AB |
475 | if (!battery->bat.dev) |
476 | sysfs_add_battery(battery); | |
f1d4661a | 477 | return acpi_battery_get_state(battery); |
4bd35cdb VL |
478 | } |
479 | ||
1da177e4 LT |
480 | /* -------------------------------------------------------------------------- |
481 | FS Interface (/proc) | |
482 | -------------------------------------------------------------------------- */ | |
483 | ||
fdcedbba | 484 | #ifdef CONFIG_ACPI_PROCFS_POWER |
4be44fcd | 485 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 486 | |
78490d82 | 487 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 488 | { |
50dd0969 | 489 | struct acpi_battery *battery = seq->private; |
1da177e4 | 490 | |
b6ce4083 | 491 | if (result) |
1da177e4 LT |
492 | goto end; |
493 | ||
aa650bbd AS |
494 | seq_printf(seq, "present: %s\n", |
495 | acpi_battery_present(battery)?"yes":"no"); | |
496 | if (!acpi_battery_present(battery)) | |
1da177e4 | 497 | goto end; |
038fdea2 | 498 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
499 | seq_printf(seq, "design capacity: unknown\n"); |
500 | else | |
501 | seq_printf(seq, "design capacity: %d %sh\n", | |
aa650bbd AS |
502 | battery->design_capacity, |
503 | acpi_battery_units(battery)); | |
1da177e4 | 504 | |
d7380965 | 505 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
506 | seq_printf(seq, "last full capacity: unknown\n"); |
507 | else | |
508 | seq_printf(seq, "last full capacity: %d %sh\n", | |
d7380965 | 509 | battery->full_charge_capacity, |
aa650bbd AS |
510 | acpi_battery_units(battery)); |
511 | ||
512 | seq_printf(seq, "battery technology: %srechargeable\n", | |
513 | (!battery->technology)?"non-":""); | |
1da177e4 | 514 | |
038fdea2 | 515 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
516 | seq_printf(seq, "design voltage: unknown\n"); |
517 | else | |
518 | seq_printf(seq, "design voltage: %d mV\n", | |
aa650bbd | 519 | battery->design_voltage); |
1da177e4 | 520 | seq_printf(seq, "design capacity warning: %d %sh\n", |
aa650bbd AS |
521 | battery->design_capacity_warning, |
522 | acpi_battery_units(battery)); | |
1da177e4 | 523 | seq_printf(seq, "design capacity low: %d %sh\n", |
aa650bbd AS |
524 | battery->design_capacity_low, |
525 | acpi_battery_units(battery)); | |
1da177e4 | 526 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
aa650bbd AS |
527 | battery->capacity_granularity_1, |
528 | acpi_battery_units(battery)); | |
1da177e4 | 529 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
aa650bbd AS |
530 | battery->capacity_granularity_2, |
531 | acpi_battery_units(battery)); | |
038fdea2 AS |
532 | seq_printf(seq, "model number: %s\n", battery->model_number); |
533 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
534 | seq_printf(seq, "battery type: %s\n", battery->type); | |
535 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
4be44fcd | 536 | end: |
b6ce4083 VL |
537 | if (result) |
538 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
b6ce4083 VL |
539 | return result; |
540 | } | |
541 | ||
78490d82 | 542 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
1da177e4 | 543 | { |
50dd0969 | 544 | struct acpi_battery *battery = seq->private; |
1da177e4 | 545 | |
b6ce4083 | 546 | if (result) |
1da177e4 LT |
547 | goto end; |
548 | ||
aa650bbd AS |
549 | seq_printf(seq, "present: %s\n", |
550 | acpi_battery_present(battery)?"yes":"no"); | |
551 | if (!acpi_battery_present(battery)) | |
1da177e4 | 552 | goto end; |
b6ce4083 | 553 | |
aa650bbd AS |
554 | seq_printf(seq, "capacity state: %s\n", |
555 | (battery->state & 0x04)?"critical":"ok"); | |
556 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
4be44fcd LB |
557 | seq_printf(seq, |
558 | "charging state: charging/discharging\n"); | |
aa650bbd | 559 | else if (battery->state & 0x01) |
1da177e4 | 560 | seq_printf(seq, "charging state: discharging\n"); |
038fdea2 | 561 | else if (battery->state & 0x02) |
1da177e4 | 562 | seq_printf(seq, "charging state: charging\n"); |
aa650bbd | 563 | else |
1da177e4 | 564 | seq_printf(seq, "charging state: charged\n"); |
1da177e4 | 565 | |
d7380965 | 566 | if (battery->current_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
567 | seq_printf(seq, "present rate: unknown\n"); |
568 | else | |
569 | seq_printf(seq, "present rate: %d %s\n", | |
d7380965 | 570 | battery->current_now, acpi_battery_units(battery)); |
1da177e4 | 571 | |
d7380965 | 572 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
573 | seq_printf(seq, "remaining capacity: unknown\n"); |
574 | else | |
575 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
d7380965 AS |
576 | battery->capacity_now, acpi_battery_units(battery)); |
577 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 LT |
578 | seq_printf(seq, "present voltage: unknown\n"); |
579 | else | |
580 | seq_printf(seq, "present voltage: %d mV\n", | |
d7380965 | 581 | battery->voltage_now); |
4be44fcd | 582 | end: |
aa650bbd | 583 | if (result) |
b6ce4083 | 584 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
b6ce4083 VL |
585 | |
586 | return result; | |
587 | } | |
588 | ||
78490d82 | 589 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 590 | { |
50dd0969 | 591 | struct acpi_battery *battery = seq->private; |
1da177e4 | 592 | |
b6ce4083 | 593 | if (result) |
1da177e4 LT |
594 | goto end; |
595 | ||
b6ce4083 | 596 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
597 | seq_printf(seq, "present: no\n"); |
598 | goto end; | |
599 | } | |
1da177e4 LT |
600 | seq_printf(seq, "alarm: "); |
601 | if (!battery->alarm) | |
602 | seq_printf(seq, "unsupported\n"); | |
603 | else | |
aa650bbd AS |
604 | seq_printf(seq, "%u %sh\n", battery->alarm, |
605 | acpi_battery_units(battery)); | |
4be44fcd | 606 | end: |
b6ce4083 VL |
607 | if (result) |
608 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
b6ce4083 VL |
609 | return result; |
610 | } | |
611 | ||
f1d4661a AS |
612 | static ssize_t acpi_battery_write_alarm(struct file *file, |
613 | const char __user * buffer, | |
614 | size_t count, loff_t * ppos) | |
1da177e4 | 615 | { |
4be44fcd LB |
616 | int result = 0; |
617 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
618 | struct seq_file *m = file->private_data; |
619 | struct acpi_battery *battery = m->private; | |
1da177e4 | 620 | |
1da177e4 | 621 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 622 | return -EINVAL; |
b6ce4083 VL |
623 | if (!acpi_battery_present(battery)) { |
624 | result = -ENODEV; | |
625 | goto end; | |
626 | } | |
b6ce4083 VL |
627 | if (copy_from_user(alarm_string, buffer, count)) { |
628 | result = -EFAULT; | |
629 | goto end; | |
630 | } | |
1da177e4 | 631 | alarm_string[count] = '\0'; |
f1d4661a | 632 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
aa650bbd | 633 | result = acpi_battery_set_alarm(battery); |
b6ce4083 | 634 | end: |
b6ce4083 | 635 | if (!result) |
f1d4661a | 636 | return count; |
78490d82 AS |
637 | return result; |
638 | } | |
639 | ||
640 | typedef int(*print_func)(struct seq_file *seq, int result); | |
aa650bbd AS |
641 | |
642 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
643 | acpi_battery_print_info, | |
644 | acpi_battery_print_state, | |
645 | acpi_battery_print_alarm, | |
78490d82 | 646 | }; |
b6ce4083 | 647 | |
78490d82 AS |
648 | static int acpi_battery_read(int fid, struct seq_file *seq) |
649 | { | |
650 | struct acpi_battery *battery = seq->private; | |
f1d4661a | 651 | int result = acpi_battery_update(battery); |
aa650bbd | 652 | return acpi_print_funcs[fid](seq, result); |
78490d82 AS |
653 | } |
654 | ||
aa650bbd AS |
655 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
656 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
657 | { \ | |
658 | return acpi_battery_read(_name##_tag, seq); \ | |
659 | } \ | |
660 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
661 | { \ | |
662 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ | |
78490d82 AS |
663 | } |
664 | ||
aa650bbd AS |
665 | DECLARE_FILE_FUNCTIONS(info); |
666 | DECLARE_FILE_FUNCTIONS(state); | |
667 | DECLARE_FILE_FUNCTIONS(alarm); | |
668 | ||
669 | #undef DECLARE_FILE_FUNCTIONS | |
670 | ||
671 | #define FILE_DESCRIPTION_RO(_name) \ | |
672 | { \ | |
673 | .name = __stringify(_name), \ | |
674 | .mode = S_IRUGO, \ | |
675 | .ops = { \ | |
676 | .open = acpi_battery_##_name##_open_fs, \ | |
677 | .read = seq_read, \ | |
678 | .llseek = seq_lseek, \ | |
679 | .release = single_release, \ | |
680 | .owner = THIS_MODULE, \ | |
681 | }, \ | |
682 | } | |
78490d82 | 683 | |
aa650bbd AS |
684 | #define FILE_DESCRIPTION_RW(_name) \ |
685 | { \ | |
686 | .name = __stringify(_name), \ | |
687 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
688 | .ops = { \ | |
689 | .open = acpi_battery_##_name##_open_fs, \ | |
690 | .read = seq_read, \ | |
691 | .llseek = seq_lseek, \ | |
692 | .write = acpi_battery_write_##_name, \ | |
693 | .release = single_release, \ | |
694 | .owner = THIS_MODULE, \ | |
695 | }, \ | |
696 | } | |
1da177e4 | 697 | |
78490d82 AS |
698 | static struct battery_file { |
699 | struct file_operations ops; | |
700 | mode_t mode; | |
701 | char *name; | |
702 | } acpi_battery_file[] = { | |
aa650bbd AS |
703 | FILE_DESCRIPTION_RO(info), |
704 | FILE_DESCRIPTION_RO(state), | |
705 | FILE_DESCRIPTION_RW(alarm), | |
1da177e4 LT |
706 | }; |
707 | ||
aa650bbd AS |
708 | #undef FILE_DESCRIPTION_RO |
709 | #undef FILE_DESCRIPTION_RW | |
710 | ||
4be44fcd | 711 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 712 | { |
4be44fcd | 713 | struct proc_dir_entry *entry = NULL; |
78490d82 | 714 | int i; |
1da177e4 | 715 | |
1da177e4 LT |
716 | if (!acpi_device_dir(device)) { |
717 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 718 | acpi_battery_dir); |
1da177e4 | 719 | if (!acpi_device_dir(device)) |
d550d98d | 720 | return -ENODEV; |
1da177e4 LT |
721 | acpi_device_dir(device)->owner = THIS_MODULE; |
722 | } | |
723 | ||
78490d82 AS |
724 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
725 | entry = create_proc_entry(acpi_battery_file[i].name, | |
726 | acpi_battery_file[i].mode, acpi_device_dir(device)); | |
727 | if (!entry) | |
728 | return -ENODEV; | |
729 | else { | |
730 | entry->proc_fops = &acpi_battery_file[i].ops; | |
731 | entry->data = acpi_driver_data(device); | |
732 | entry->owner = THIS_MODULE; | |
733 | } | |
1da177e4 | 734 | } |
d550d98d | 735 | return 0; |
1da177e4 LT |
736 | } |
737 | ||
aa650bbd | 738 | static void acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 739 | { |
78490d82 | 740 | int i; |
aa650bbd AS |
741 | if (!acpi_device_dir(device)) |
742 | return; | |
743 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
744 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 745 | acpi_device_dir(device)); |
1da177e4 | 746 | |
aa650bbd AS |
747 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
748 | acpi_device_dir(device) = NULL; | |
1da177e4 LT |
749 | } |
750 | ||
d7380965 | 751 | #endif |
3e58ea0d | 752 | |
1da177e4 LT |
753 | /* -------------------------------------------------------------------------- |
754 | Driver Interface | |
755 | -------------------------------------------------------------------------- */ | |
756 | ||
4be44fcd | 757 | static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 758 | { |
50dd0969 | 759 | struct acpi_battery *battery = data; |
f1d4661a | 760 | struct acpi_device *device; |
1da177e4 | 761 | if (!battery) |
d550d98d | 762 | return; |
145def84 | 763 | device = battery->device; |
f1d4661a AS |
764 | acpi_battery_update(battery); |
765 | acpi_bus_generate_proc_event(device, event, | |
766 | acpi_battery_present(battery)); | |
767 | acpi_bus_generate_netlink_event(device->pnp.device_class, | |
768 | device->dev.bus_id, event, | |
9ea7d575 | 769 | acpi_battery_present(battery)); |
508df92d AB |
770 | /* acpi_batter_update could remove power_supply object */ |
771 | if (battery->bat.dev) | |
772 | kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE); | |
1da177e4 LT |
773 | } |
774 | ||
4be44fcd | 775 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 776 | { |
4be44fcd LB |
777 | int result = 0; |
778 | acpi_status status = 0; | |
779 | struct acpi_battery *battery = NULL; | |
1da177e4 | 780 | if (!device) |
d550d98d | 781 | return -EINVAL; |
36bcbec7 | 782 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 783 | if (!battery) |
d550d98d | 784 | return -ENOMEM; |
145def84 | 785 | battery->device = device; |
1da177e4 LT |
786 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
787 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
788 | acpi_driver_data(device) = battery; | |
038fdea2 | 789 | mutex_init(&battery->lock); |
f1d4661a | 790 | acpi_battery_update(battery); |
fdcedbba | 791 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
792 | result = acpi_battery_add_fs(device); |
793 | if (result) | |
794 | goto end; | |
d7380965 | 795 | #endif |
3b073ec3 | 796 | status = acpi_install_notify_handler(device->handle, |
9fdae727 | 797 | ACPI_ALL_NOTIFY, |
4be44fcd | 798 | acpi_battery_notify, battery); |
1da177e4 | 799 | if (ACPI_FAILURE(status)) { |
b6ce4083 | 800 | ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler")); |
1da177e4 LT |
801 | result = -ENODEV; |
802 | goto end; | |
803 | } | |
1da177e4 | 804 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
4be44fcd LB |
805 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
806 | device->status.battery_present ? "present" : "absent"); | |
4be44fcd | 807 | end: |
1da177e4 | 808 | if (result) { |
fdcedbba | 809 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 810 | acpi_battery_remove_fs(device); |
d7380965 | 811 | #endif |
1da177e4 LT |
812 | kfree(battery); |
813 | } | |
d550d98d | 814 | return result; |
1da177e4 LT |
815 | } |
816 | ||
4be44fcd | 817 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 818 | { |
4be44fcd LB |
819 | acpi_status status = 0; |
820 | struct acpi_battery *battery = NULL; | |
1da177e4 | 821 | |
1da177e4 | 822 | if (!device || !acpi_driver_data(device)) |
d550d98d | 823 | return -EINVAL; |
50dd0969 | 824 | battery = acpi_driver_data(device); |
3b073ec3 | 825 | status = acpi_remove_notify_handler(device->handle, |
9fdae727 | 826 | ACPI_ALL_NOTIFY, |
4be44fcd | 827 | acpi_battery_notify); |
fdcedbba | 828 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 829 | acpi_battery_remove_fs(device); |
d7380965 | 830 | #endif |
508df92d | 831 | sysfs_remove_battery(battery); |
038fdea2 | 832 | mutex_destroy(&battery->lock); |
1da177e4 | 833 | kfree(battery); |
d550d98d | 834 | return 0; |
1da177e4 LT |
835 | } |
836 | ||
34c4415a | 837 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 838 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
839 | { |
840 | struct acpi_battery *battery; | |
34c4415a JK |
841 | if (!device) |
842 | return -EINVAL; | |
f1d4661a AS |
843 | battery = acpi_driver_data(device); |
844 | battery->update_time = 0; | |
508df92d | 845 | acpi_battery_update(battery); |
b6ce4083 | 846 | return 0; |
34c4415a JK |
847 | } |
848 | ||
aa650bbd AS |
849 | static struct acpi_driver acpi_battery_driver = { |
850 | .name = "battery", | |
851 | .class = ACPI_BATTERY_CLASS, | |
852 | .ids = battery_device_ids, | |
853 | .ops = { | |
854 | .add = acpi_battery_add, | |
855 | .resume = acpi_battery_resume, | |
856 | .remove = acpi_battery_remove, | |
857 | }, | |
858 | }; | |
859 | ||
4be44fcd | 860 | static int __init acpi_battery_init(void) |
1da177e4 | 861 | { |
4d8316d5 PM |
862 | if (acpi_disabled) |
863 | return -ENODEV; | |
fdcedbba | 864 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 865 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 866 | if (!acpi_battery_dir) |
d550d98d | 867 | return -ENODEV; |
d7380965 | 868 | #endif |
aa650bbd | 869 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
fdcedbba | 870 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 871 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 872 | #endif |
d550d98d | 873 | return -ENODEV; |
1da177e4 | 874 | } |
d550d98d | 875 | return 0; |
1da177e4 LT |
876 | } |
877 | ||
4be44fcd | 878 | static void __exit acpi_battery_exit(void) |
1da177e4 | 879 | { |
1da177e4 | 880 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fdcedbba | 881 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 882 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 883 | #endif |
1da177e4 LT |
884 | } |
885 | ||
1da177e4 LT |
886 | module_init(acpi_battery_init); |
887 | module_exit(acpi_battery_exit); |