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