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 | ||
97749cd9 | 43 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d7380965 | 44 | #include <linux/power_supply.h> |
97749cd9 | 45 | #endif |
d7380965 | 46 | |
1da177e4 LT |
47 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
48 | ||
1da177e4 LT |
49 | #define ACPI_BATTERY_COMPONENT 0x00040000 |
50 | #define ACPI_BATTERY_CLASS "battery" | |
1da177e4 | 51 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 LT |
52 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
53 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
1da177e4 | 54 | |
1da177e4 | 55 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 56 | |
f52fd66d | 57 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 58 | |
f52fd66d | 59 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 60 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 61 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
62 | MODULE_LICENSE("GPL"); |
63 | ||
f1d4661a AS |
64 | static unsigned int cache_time = 1000; |
65 | module_param(cache_time, uint, 0644); | |
66 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 67 | |
fdcedbba | 68 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 RT |
69 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
70 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
71 | ||
d7380965 AS |
72 | enum acpi_battery_files { |
73 | info_tag = 0, | |
74 | state_tag, | |
75 | alarm_tag, | |
76 | ACPI_BATTERY_NUMFILES, | |
77 | }; | |
78 | ||
79 | #endif | |
80 | ||
1ba90e3a TR |
81 | static const struct acpi_device_id battery_device_ids[] = { |
82 | {"PNP0C0A", 0}, | |
83 | {"", 0}, | |
84 | }; | |
1ba90e3a | 85 | |
aa650bbd | 86 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 87 | |
78490d82 | 88 | |
1da177e4 | 89 | struct acpi_battery { |
038fdea2 | 90 | struct mutex lock; |
97749cd9 | 91 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d7380965 | 92 | struct power_supply bat; |
97749cd9 | 93 | #endif |
f1d4661a AS |
94 | struct acpi_device *device; |
95 | unsigned long update_time; | |
d7380965 AS |
96 | int current_now; |
97 | int capacity_now; | |
98 | int voltage_now; | |
038fdea2 | 99 | int design_capacity; |
d7380965 | 100 | int full_charge_capacity; |
038fdea2 AS |
101 | int technology; |
102 | int design_voltage; | |
103 | int design_capacity_warning; | |
104 | int design_capacity_low; | |
105 | int capacity_granularity_1; | |
106 | int capacity_granularity_2; | |
f1d4661a | 107 | int alarm; |
038fdea2 AS |
108 | char model_number[32]; |
109 | char serial_number[32]; | |
110 | char type[32]; | |
111 | char oem_info[32]; | |
f1d4661a AS |
112 | int state; |
113 | int power_unit; | |
038fdea2 | 114 | u8 alarm_present; |
1da177e4 LT |
115 | }; |
116 | ||
d7380965 AS |
117 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat); |
118 | ||
78490d82 | 119 | inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 120 | { |
78490d82 AS |
121 | return battery->device->status.battery_present; |
122 | } | |
038fdea2 | 123 | |
97749cd9 | 124 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d7380965 AS |
125 | static int acpi_battery_technology(struct acpi_battery *battery) |
126 | { | |
127 | if (!strcasecmp("NiCd", battery->type)) | |
128 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
129 | if (!strcasecmp("NiMH", battery->type)) | |
130 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
131 | if (!strcasecmp("LION", battery->type)) | |
132 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 133 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 134 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
135 | if (!strcasecmp("LiP", battery->type)) |
136 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
137 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
138 | } | |
139 | ||
9104476e | 140 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 141 | |
d7380965 AS |
142 | static int acpi_battery_get_property(struct power_supply *psy, |
143 | enum power_supply_property psp, | |
144 | union power_supply_propval *val) | |
145 | { | |
146 | struct acpi_battery *battery = to_acpi_battery(psy); | |
147 | ||
9104476e AS |
148 | if (acpi_battery_present(battery)) { |
149 | /* run battery update only if it is present */ | |
150 | acpi_battery_get_state(battery); | |
151 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
152 | return -ENODEV; |
153 | switch (psp) { | |
154 | case POWER_SUPPLY_PROP_STATUS: | |
155 | if (battery->state & 0x01) | |
156 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
157 | else if (battery->state & 0x02) | |
158 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
159 | else if (battery->state == 0) | |
160 | val->intval = POWER_SUPPLY_STATUS_FULL; | |
4c41d3ad RD |
161 | else |
162 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
163 | break; |
164 | case POWER_SUPPLY_PROP_PRESENT: | |
165 | val->intval = acpi_battery_present(battery); | |
166 | break; | |
167 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
168 | val->intval = acpi_battery_technology(battery); | |
169 | break; | |
170 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
171 | val->intval = battery->design_voltage * 1000; | |
172 | break; | |
173 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
174 | val->intval = battery->voltage_now * 1000; | |
175 | break; | |
176 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
177 | val->intval = battery->current_now * 1000; | |
178 | break; | |
179 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
180 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
181 | val->intval = battery->design_capacity * 1000; | |
182 | break; | |
183 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
184 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
185 | val->intval = battery->full_charge_capacity * 1000; | |
186 | break; | |
187 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
188 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
189 | val->intval = battery->capacity_now * 1000; | |
190 | break; | |
191 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
192 | val->strval = battery->model_number; | |
193 | break; | |
194 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
195 | val->strval = battery->oem_info; | |
196 | break; | |
197 | default: | |
198 | return -EINVAL; | |
199 | } | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static enum power_supply_property charge_battery_props[] = { | |
204 | POWER_SUPPLY_PROP_STATUS, | |
205 | POWER_SUPPLY_PROP_PRESENT, | |
206 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
207 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
208 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
209 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
210 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
211 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
212 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
213 | POWER_SUPPLY_PROP_MODEL_NAME, | |
214 | POWER_SUPPLY_PROP_MANUFACTURER, | |
215 | }; | |
216 | ||
217 | static enum power_supply_property energy_battery_props[] = { | |
218 | POWER_SUPPLY_PROP_STATUS, | |
219 | POWER_SUPPLY_PROP_PRESENT, | |
220 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
221 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
222 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
223 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
224 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, | |
225 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
226 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
227 | POWER_SUPPLY_PROP_MODEL_NAME, | |
228 | POWER_SUPPLY_PROP_MANUFACTURER, | |
229 | }; | |
97749cd9 | 230 | #endif |
d7380965 | 231 | |
fdcedbba | 232 | #ifdef CONFIG_ACPI_PROCFS_POWER |
f1d4661a | 233 | inline char *acpi_battery_units(struct acpi_battery *battery) |
78490d82 | 234 | { |
f1d4661a | 235 | return (battery->power_unit)?"mA":"mW"; |
b6ce4083 | 236 | } |
d7380965 | 237 | #endif |
b6ce4083 | 238 | |
78490d82 AS |
239 | /* -------------------------------------------------------------------------- |
240 | Battery Management | |
241 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
242 | struct acpi_offsets { |
243 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
244 | u8 mode; /* int or string? */ | |
245 | }; | |
b6ce4083 | 246 | |
038fdea2 AS |
247 | static struct acpi_offsets state_offsets[] = { |
248 | {offsetof(struct acpi_battery, state), 0}, | |
d7380965 AS |
249 | {offsetof(struct acpi_battery, current_now), 0}, |
250 | {offsetof(struct acpi_battery, capacity_now), 0}, | |
251 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 252 | }; |
b6ce4083 | 253 | |
038fdea2 AS |
254 | static struct acpi_offsets info_offsets[] = { |
255 | {offsetof(struct acpi_battery, power_unit), 0}, | |
256 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 257 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
258 | {offsetof(struct acpi_battery, technology), 0}, |
259 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
260 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
261 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
262 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
263 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
264 | {offsetof(struct acpi_battery, model_number), 1}, | |
265 | {offsetof(struct acpi_battery, serial_number), 1}, | |
266 | {offsetof(struct acpi_battery, type), 1}, | |
267 | {offsetof(struct acpi_battery, oem_info), 1}, | |
268 | }; | |
b6ce4083 | 269 | |
038fdea2 AS |
270 | static int extract_package(struct acpi_battery *battery, |
271 | union acpi_object *package, | |
272 | struct acpi_offsets *offsets, int num) | |
273 | { | |
106449e8 | 274 | int i; |
038fdea2 AS |
275 | union acpi_object *element; |
276 | if (package->type != ACPI_TYPE_PACKAGE) | |
277 | return -EFAULT; | |
278 | for (i = 0; i < num; ++i) { | |
279 | if (package->package.count <= i) | |
280 | return -EFAULT; | |
281 | element = &package->package.elements[i]; | |
282 | if (offsets[i].mode) { | |
106449e8 AS |
283 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
284 | if (element->type == ACPI_TYPE_STRING || | |
285 | element->type == ACPI_TYPE_BUFFER) | |
286 | strncpy(ptr, element->string.pointer, 32); | |
287 | else if (element->type == ACPI_TYPE_INTEGER) { | |
288 | strncpy(ptr, (u8 *)&element->integer.value, | |
289 | sizeof(acpi_integer)); | |
290 | ptr[sizeof(acpi_integer)] = 0; | |
291 | } else return -EFAULT; | |
038fdea2 | 292 | } else { |
106449e8 AS |
293 | if (element->type == ACPI_TYPE_INTEGER) { |
294 | int *x = (int *)((u8 *)battery + | |
295 | offsets[i].offset); | |
296 | *x = element->integer.value; | |
297 | } else return -EFAULT; | |
038fdea2 | 298 | } |
b6ce4083 | 299 | } |
b6ce4083 VL |
300 | return 0; |
301 | } | |
302 | ||
303 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
304 | { | |
aa650bbd | 305 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
306 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
307 | return -ENODEV; | |
308 | } | |
aa650bbd | 309 | return 0; |
b6ce4083 VL |
310 | } |
311 | ||
312 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 313 | { |
aa650bbd | 314 | int result = -EFAULT; |
4be44fcd LB |
315 | acpi_status status = 0; |
316 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 317 | |
b6ce4083 VL |
318 | if (!acpi_battery_present(battery)) |
319 | return 0; | |
038fdea2 | 320 | mutex_lock(&battery->lock); |
f1d4661a | 321 | status = acpi_evaluate_object(battery->device->handle, "_BIF", |
038fdea2 AS |
322 | NULL, &buffer); |
323 | mutex_unlock(&battery->lock); | |
aa650bbd | 324 | |
1da177e4 | 325 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 326 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
d550d98d | 327 | return -ENODEV; |
1da177e4 | 328 | } |
aa650bbd | 329 | |
038fdea2 AS |
330 | result = extract_package(battery, buffer.pointer, |
331 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 332 | kfree(buffer.pointer); |
d550d98d | 333 | return result; |
1da177e4 LT |
334 | } |
335 | ||
b6ce4083 | 336 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 337 | { |
4be44fcd LB |
338 | int result = 0; |
339 | acpi_status status = 0; | |
340 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 341 | |
b6ce4083 VL |
342 | if (!acpi_battery_present(battery)) |
343 | return 0; | |
1da177e4 | 344 | |
f1d4661a AS |
345 | if (battery->update_time && |
346 | time_before(jiffies, battery->update_time + | |
347 | msecs_to_jiffies(cache_time))) | |
348 | return 0; | |
349 | ||
038fdea2 | 350 | mutex_lock(&battery->lock); |
f1d4661a | 351 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
352 | NULL, &buffer); |
353 | mutex_unlock(&battery->lock); | |
5b31d895 | 354 | |
1da177e4 | 355 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 356 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 357 | return -ENODEV; |
1da177e4 | 358 | } |
aa650bbd | 359 | |
038fdea2 AS |
360 | result = extract_package(battery, buffer.pointer, |
361 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 362 | battery->update_time = jiffies; |
78490d82 | 363 | kfree(buffer.pointer); |
b6ce4083 VL |
364 | return result; |
365 | } | |
1da177e4 | 366 | |
aa650bbd | 367 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 368 | { |
4be44fcd | 369 | acpi_status status = 0; |
aa650bbd | 370 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
4be44fcd | 371 | struct acpi_object_list arg_list = { 1, &arg0 }; |
1da177e4 | 372 | |
aa650bbd | 373 | if (!acpi_battery_present(battery)|| !battery->alarm_present) |
d550d98d | 374 | return -ENODEV; |
1da177e4 | 375 | |
aa650bbd | 376 | arg0.integer.value = battery->alarm; |
1da177e4 | 377 | |
038fdea2 | 378 | mutex_lock(&battery->lock); |
f1d4661a AS |
379 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
380 | &arg_list, NULL); | |
038fdea2 | 381 | mutex_unlock(&battery->lock); |
aa650bbd | 382 | |
1da177e4 | 383 | if (ACPI_FAILURE(status)) |
d550d98d | 384 | return -ENODEV; |
1da177e4 | 385 | |
aa650bbd | 386 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 387 | return 0; |
1da177e4 LT |
388 | } |
389 | ||
b6ce4083 | 390 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 391 | { |
4be44fcd LB |
392 | acpi_status status = AE_OK; |
393 | acpi_handle handle = NULL; | |
4be44fcd | 394 | |
b6ce4083 | 395 | /* See if alarms are supported, and if so, set default */ |
f1d4661a AS |
396 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
397 | if (ACPI_FAILURE(status)) { | |
038fdea2 | 398 | battery->alarm_present = 0; |
f1d4661a | 399 | return 0; |
b6ce4083 | 400 | } |
f1d4661a AS |
401 | battery->alarm_present = 1; |
402 | if (!battery->alarm) | |
403 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 404 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 405 | } |
1da177e4 | 406 | |
97749cd9 | 407 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
408 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
409 | struct device_attribute *attr, | |
410 | char *buf) | |
411 | { | |
412 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
413 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
414 | } | |
415 | ||
416 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
417 | struct device_attribute *attr, | |
418 | const char *buf, size_t count) | |
419 | { | |
420 | unsigned long x; | |
421 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
422 | if (sscanf(buf, "%ld\n", &x) == 1) | |
423 | battery->alarm = x/1000; | |
424 | if (acpi_battery_present(battery)) | |
425 | acpi_battery_set_alarm(battery); | |
426 | return count; | |
427 | } | |
428 | ||
429 | static struct device_attribute alarm_attr = { | |
430 | .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE}, | |
431 | .show = acpi_battery_alarm_show, | |
432 | .store = acpi_battery_alarm_store, | |
433 | }; | |
434 | ||
435 | static int sysfs_add_battery(struct acpi_battery *battery) | |
436 | { | |
437 | int result; | |
438 | ||
508df92d AB |
439 | if (battery->power_unit) { |
440 | battery->bat.properties = charge_battery_props; | |
441 | battery->bat.num_properties = | |
442 | ARRAY_SIZE(charge_battery_props); | |
443 | } else { | |
444 | battery->bat.properties = energy_battery_props; | |
445 | battery->bat.num_properties = | |
446 | ARRAY_SIZE(energy_battery_props); | |
447 | } | |
448 | ||
449 | battery->bat.name = acpi_device_bid(battery->device); | |
450 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
451 | battery->bat.get_property = acpi_battery_get_property; | |
452 | ||
453 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
454 | if (result) | |
455 | return result; | |
456 | return device_create_file(battery->bat.dev, &alarm_attr); | |
457 | } | |
458 | ||
459 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
460 | { | |
461 | if (!battery->bat.dev) | |
462 | return; | |
463 | device_remove_file(battery->bat.dev, &alarm_attr); | |
464 | power_supply_unregister(&battery->bat); | |
9104476e | 465 | battery->bat.dev = NULL; |
508df92d | 466 | } |
97749cd9 | 467 | #endif |
508df92d | 468 | |
f1d4661a | 469 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 470 | { |
97749cd9 AS |
471 | int result; |
472 | result = acpi_battery_get_status(battery); | |
508df92d | 473 | if (result) |
b6ce4083 | 474 | return result; |
97749cd9 | 475 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
476 | if (!acpi_battery_present(battery)) { |
477 | sysfs_remove_battery(battery); | |
97749cd9 | 478 | battery->update_time = 0; |
508df92d | 479 | return 0; |
b6ce4083 | 480 | } |
97749cd9 AS |
481 | #endif |
482 | if (!battery->update_time) { | |
483 | result = acpi_battery_get_info(battery); | |
484 | if (result) | |
485 | return result; | |
486 | acpi_battery_init_alarm(battery); | |
487 | } | |
488 | #ifdef CONFIG_ACPI_SYSFS_POWER | |
508df92d AB |
489 | if (!battery->bat.dev) |
490 | sysfs_add_battery(battery); | |
97749cd9 | 491 | #endif |
f1d4661a | 492 | return acpi_battery_get_state(battery); |
4bd35cdb VL |
493 | } |
494 | ||
1da177e4 LT |
495 | /* -------------------------------------------------------------------------- |
496 | FS Interface (/proc) | |
497 | -------------------------------------------------------------------------- */ | |
498 | ||
fdcedbba | 499 | #ifdef CONFIG_ACPI_PROCFS_POWER |
4be44fcd | 500 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 501 | |
78490d82 | 502 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 503 | { |
50dd0969 | 504 | struct acpi_battery *battery = seq->private; |
1da177e4 | 505 | |
b6ce4083 | 506 | if (result) |
1da177e4 LT |
507 | goto end; |
508 | ||
aa650bbd AS |
509 | seq_printf(seq, "present: %s\n", |
510 | acpi_battery_present(battery)?"yes":"no"); | |
511 | if (!acpi_battery_present(battery)) | |
1da177e4 | 512 | goto end; |
038fdea2 | 513 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
514 | seq_printf(seq, "design capacity: unknown\n"); |
515 | else | |
516 | seq_printf(seq, "design capacity: %d %sh\n", | |
aa650bbd AS |
517 | battery->design_capacity, |
518 | acpi_battery_units(battery)); | |
1da177e4 | 519 | |
d7380965 | 520 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
521 | seq_printf(seq, "last full capacity: unknown\n"); |
522 | else | |
523 | seq_printf(seq, "last full capacity: %d %sh\n", | |
d7380965 | 524 | battery->full_charge_capacity, |
aa650bbd AS |
525 | acpi_battery_units(battery)); |
526 | ||
527 | seq_printf(seq, "battery technology: %srechargeable\n", | |
528 | (!battery->technology)?"non-":""); | |
1da177e4 | 529 | |
038fdea2 | 530 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
531 | seq_printf(seq, "design voltage: unknown\n"); |
532 | else | |
533 | seq_printf(seq, "design voltage: %d mV\n", | |
aa650bbd | 534 | battery->design_voltage); |
1da177e4 | 535 | seq_printf(seq, "design capacity warning: %d %sh\n", |
aa650bbd AS |
536 | battery->design_capacity_warning, |
537 | acpi_battery_units(battery)); | |
1da177e4 | 538 | seq_printf(seq, "design capacity low: %d %sh\n", |
aa650bbd AS |
539 | battery->design_capacity_low, |
540 | acpi_battery_units(battery)); | |
1da177e4 | 541 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
aa650bbd AS |
542 | battery->capacity_granularity_1, |
543 | acpi_battery_units(battery)); | |
1da177e4 | 544 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
aa650bbd AS |
545 | battery->capacity_granularity_2, |
546 | acpi_battery_units(battery)); | |
038fdea2 AS |
547 | seq_printf(seq, "model number: %s\n", battery->model_number); |
548 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
549 | seq_printf(seq, "battery type: %s\n", battery->type); | |
550 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
4be44fcd | 551 | end: |
b6ce4083 VL |
552 | if (result) |
553 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
b6ce4083 VL |
554 | return result; |
555 | } | |
556 | ||
78490d82 | 557 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
1da177e4 | 558 | { |
50dd0969 | 559 | struct acpi_battery *battery = seq->private; |
1da177e4 | 560 | |
b6ce4083 | 561 | if (result) |
1da177e4 LT |
562 | goto end; |
563 | ||
aa650bbd AS |
564 | seq_printf(seq, "present: %s\n", |
565 | acpi_battery_present(battery)?"yes":"no"); | |
566 | if (!acpi_battery_present(battery)) | |
1da177e4 | 567 | goto end; |
b6ce4083 | 568 | |
aa650bbd AS |
569 | seq_printf(seq, "capacity state: %s\n", |
570 | (battery->state & 0x04)?"critical":"ok"); | |
571 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
4be44fcd LB |
572 | seq_printf(seq, |
573 | "charging state: charging/discharging\n"); | |
aa650bbd | 574 | else if (battery->state & 0x01) |
1da177e4 | 575 | seq_printf(seq, "charging state: discharging\n"); |
038fdea2 | 576 | else if (battery->state & 0x02) |
1da177e4 | 577 | seq_printf(seq, "charging state: charging\n"); |
aa650bbd | 578 | else |
1da177e4 | 579 | seq_printf(seq, "charging state: charged\n"); |
1da177e4 | 580 | |
d7380965 | 581 | if (battery->current_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
582 | seq_printf(seq, "present rate: unknown\n"); |
583 | else | |
584 | seq_printf(seq, "present rate: %d %s\n", | |
d7380965 | 585 | battery->current_now, acpi_battery_units(battery)); |
1da177e4 | 586 | |
d7380965 | 587 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
588 | seq_printf(seq, "remaining capacity: unknown\n"); |
589 | else | |
590 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
d7380965 AS |
591 | battery->capacity_now, acpi_battery_units(battery)); |
592 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 LT |
593 | seq_printf(seq, "present voltage: unknown\n"); |
594 | else | |
595 | seq_printf(seq, "present voltage: %d mV\n", | |
d7380965 | 596 | battery->voltage_now); |
4be44fcd | 597 | end: |
aa650bbd | 598 | if (result) |
b6ce4083 | 599 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
b6ce4083 VL |
600 | |
601 | return result; | |
602 | } | |
603 | ||
78490d82 | 604 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 605 | { |
50dd0969 | 606 | struct acpi_battery *battery = seq->private; |
1da177e4 | 607 | |
b6ce4083 | 608 | if (result) |
1da177e4 LT |
609 | goto end; |
610 | ||
b6ce4083 | 611 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
612 | seq_printf(seq, "present: no\n"); |
613 | goto end; | |
614 | } | |
1da177e4 LT |
615 | seq_printf(seq, "alarm: "); |
616 | if (!battery->alarm) | |
617 | seq_printf(seq, "unsupported\n"); | |
618 | else | |
aa650bbd AS |
619 | seq_printf(seq, "%u %sh\n", battery->alarm, |
620 | acpi_battery_units(battery)); | |
4be44fcd | 621 | end: |
b6ce4083 VL |
622 | if (result) |
623 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
b6ce4083 VL |
624 | return result; |
625 | } | |
626 | ||
f1d4661a AS |
627 | static ssize_t acpi_battery_write_alarm(struct file *file, |
628 | const char __user * buffer, | |
629 | size_t count, loff_t * ppos) | |
1da177e4 | 630 | { |
4be44fcd LB |
631 | int result = 0; |
632 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
633 | struct seq_file *m = file->private_data; |
634 | struct acpi_battery *battery = m->private; | |
1da177e4 | 635 | |
1da177e4 | 636 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 637 | return -EINVAL; |
b6ce4083 VL |
638 | if (!acpi_battery_present(battery)) { |
639 | result = -ENODEV; | |
640 | goto end; | |
641 | } | |
b6ce4083 VL |
642 | if (copy_from_user(alarm_string, buffer, count)) { |
643 | result = -EFAULT; | |
644 | goto end; | |
645 | } | |
1da177e4 | 646 | alarm_string[count] = '\0'; |
f1d4661a | 647 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
aa650bbd | 648 | result = acpi_battery_set_alarm(battery); |
b6ce4083 | 649 | end: |
b6ce4083 | 650 | if (!result) |
f1d4661a | 651 | return count; |
78490d82 AS |
652 | return result; |
653 | } | |
654 | ||
655 | typedef int(*print_func)(struct seq_file *seq, int result); | |
aa650bbd AS |
656 | |
657 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
658 | acpi_battery_print_info, | |
659 | acpi_battery_print_state, | |
660 | acpi_battery_print_alarm, | |
78490d82 | 661 | }; |
b6ce4083 | 662 | |
78490d82 AS |
663 | static int acpi_battery_read(int fid, struct seq_file *seq) |
664 | { | |
665 | struct acpi_battery *battery = seq->private; | |
f1d4661a | 666 | int result = acpi_battery_update(battery); |
aa650bbd | 667 | return acpi_print_funcs[fid](seq, result); |
78490d82 AS |
668 | } |
669 | ||
aa650bbd AS |
670 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
671 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
672 | { \ | |
673 | return acpi_battery_read(_name##_tag, seq); \ | |
674 | } \ | |
675 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
676 | { \ | |
677 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ | |
78490d82 AS |
678 | } |
679 | ||
aa650bbd AS |
680 | DECLARE_FILE_FUNCTIONS(info); |
681 | DECLARE_FILE_FUNCTIONS(state); | |
682 | DECLARE_FILE_FUNCTIONS(alarm); | |
683 | ||
684 | #undef DECLARE_FILE_FUNCTIONS | |
685 | ||
686 | #define FILE_DESCRIPTION_RO(_name) \ | |
687 | { \ | |
688 | .name = __stringify(_name), \ | |
689 | .mode = S_IRUGO, \ | |
690 | .ops = { \ | |
691 | .open = acpi_battery_##_name##_open_fs, \ | |
692 | .read = seq_read, \ | |
693 | .llseek = seq_lseek, \ | |
694 | .release = single_release, \ | |
695 | .owner = THIS_MODULE, \ | |
696 | }, \ | |
697 | } | |
78490d82 | 698 | |
aa650bbd AS |
699 | #define FILE_DESCRIPTION_RW(_name) \ |
700 | { \ | |
701 | .name = __stringify(_name), \ | |
702 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
703 | .ops = { \ | |
704 | .open = acpi_battery_##_name##_open_fs, \ | |
705 | .read = seq_read, \ | |
706 | .llseek = seq_lseek, \ | |
707 | .write = acpi_battery_write_##_name, \ | |
708 | .release = single_release, \ | |
709 | .owner = THIS_MODULE, \ | |
710 | }, \ | |
711 | } | |
1da177e4 | 712 | |
78490d82 AS |
713 | static struct battery_file { |
714 | struct file_operations ops; | |
715 | mode_t mode; | |
716 | char *name; | |
717 | } acpi_battery_file[] = { | |
aa650bbd AS |
718 | FILE_DESCRIPTION_RO(info), |
719 | FILE_DESCRIPTION_RO(state), | |
720 | FILE_DESCRIPTION_RW(alarm), | |
1da177e4 LT |
721 | }; |
722 | ||
aa650bbd AS |
723 | #undef FILE_DESCRIPTION_RO |
724 | #undef FILE_DESCRIPTION_RW | |
725 | ||
4be44fcd | 726 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 727 | { |
4be44fcd | 728 | struct proc_dir_entry *entry = NULL; |
78490d82 | 729 | int i; |
1da177e4 | 730 | |
1da177e4 LT |
731 | if (!acpi_device_dir(device)) { |
732 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 733 | acpi_battery_dir); |
1da177e4 | 734 | if (!acpi_device_dir(device)) |
d550d98d | 735 | return -ENODEV; |
1da177e4 LT |
736 | acpi_device_dir(device)->owner = THIS_MODULE; |
737 | } | |
738 | ||
78490d82 AS |
739 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
740 | entry = create_proc_entry(acpi_battery_file[i].name, | |
741 | acpi_battery_file[i].mode, acpi_device_dir(device)); | |
742 | if (!entry) | |
743 | return -ENODEV; | |
744 | else { | |
745 | entry->proc_fops = &acpi_battery_file[i].ops; | |
746 | entry->data = acpi_driver_data(device); | |
747 | entry->owner = THIS_MODULE; | |
748 | } | |
1da177e4 | 749 | } |
d550d98d | 750 | return 0; |
1da177e4 LT |
751 | } |
752 | ||
aa650bbd | 753 | static void acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 754 | { |
78490d82 | 755 | int i; |
aa650bbd AS |
756 | if (!acpi_device_dir(device)) |
757 | return; | |
758 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
759 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 760 | acpi_device_dir(device)); |
1da177e4 | 761 | |
aa650bbd AS |
762 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
763 | acpi_device_dir(device) = NULL; | |
1da177e4 LT |
764 | } |
765 | ||
d7380965 | 766 | #endif |
3e58ea0d | 767 | |
1da177e4 LT |
768 | /* -------------------------------------------------------------------------- |
769 | Driver Interface | |
770 | -------------------------------------------------------------------------- */ | |
771 | ||
4be44fcd | 772 | static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 773 | { |
50dd0969 | 774 | struct acpi_battery *battery = data; |
f1d4661a | 775 | struct acpi_device *device; |
1da177e4 | 776 | if (!battery) |
d550d98d | 777 | return; |
145def84 | 778 | device = battery->device; |
f1d4661a AS |
779 | acpi_battery_update(battery); |
780 | acpi_bus_generate_proc_event(device, event, | |
781 | acpi_battery_present(battery)); | |
782 | acpi_bus_generate_netlink_event(device->pnp.device_class, | |
783 | device->dev.bus_id, event, | |
9ea7d575 | 784 | acpi_battery_present(battery)); |
97749cd9 | 785 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
786 | /* acpi_batter_update could remove power_supply object */ |
787 | if (battery->bat.dev) | |
788 | kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE); | |
97749cd9 | 789 | #endif |
1da177e4 LT |
790 | } |
791 | ||
4be44fcd | 792 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 793 | { |
4be44fcd LB |
794 | int result = 0; |
795 | acpi_status status = 0; | |
796 | struct acpi_battery *battery = NULL; | |
1da177e4 | 797 | if (!device) |
d550d98d | 798 | return -EINVAL; |
36bcbec7 | 799 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 800 | if (!battery) |
d550d98d | 801 | return -ENOMEM; |
145def84 | 802 | battery->device = device; |
1da177e4 LT |
803 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
804 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
805 | acpi_driver_data(device) = battery; | |
038fdea2 | 806 | mutex_init(&battery->lock); |
f1d4661a | 807 | acpi_battery_update(battery); |
fdcedbba | 808 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
809 | result = acpi_battery_add_fs(device); |
810 | if (result) | |
811 | goto end; | |
d7380965 | 812 | #endif |
3b073ec3 | 813 | status = acpi_install_notify_handler(device->handle, |
9fdae727 | 814 | ACPI_ALL_NOTIFY, |
4be44fcd | 815 | acpi_battery_notify, battery); |
1da177e4 | 816 | if (ACPI_FAILURE(status)) { |
b6ce4083 | 817 | ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler")); |
1da177e4 LT |
818 | result = -ENODEV; |
819 | goto end; | |
820 | } | |
1da177e4 | 821 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
4be44fcd LB |
822 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
823 | device->status.battery_present ? "present" : "absent"); | |
4be44fcd | 824 | end: |
1da177e4 | 825 | if (result) { |
fdcedbba | 826 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 827 | acpi_battery_remove_fs(device); |
d7380965 | 828 | #endif |
1da177e4 LT |
829 | kfree(battery); |
830 | } | |
d550d98d | 831 | return result; |
1da177e4 LT |
832 | } |
833 | ||
4be44fcd | 834 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 835 | { |
4be44fcd LB |
836 | acpi_status status = 0; |
837 | struct acpi_battery *battery = NULL; | |
1da177e4 | 838 | |
1da177e4 | 839 | if (!device || !acpi_driver_data(device)) |
d550d98d | 840 | return -EINVAL; |
50dd0969 | 841 | battery = acpi_driver_data(device); |
3b073ec3 | 842 | status = acpi_remove_notify_handler(device->handle, |
9fdae727 | 843 | ACPI_ALL_NOTIFY, |
4be44fcd | 844 | acpi_battery_notify); |
fdcedbba | 845 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 846 | acpi_battery_remove_fs(device); |
d7380965 | 847 | #endif |
97749cd9 | 848 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d | 849 | sysfs_remove_battery(battery); |
97749cd9 | 850 | #endif |
038fdea2 | 851 | mutex_destroy(&battery->lock); |
1da177e4 | 852 | kfree(battery); |
d550d98d | 853 | return 0; |
1da177e4 LT |
854 | } |
855 | ||
34c4415a | 856 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 857 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
858 | { |
859 | struct acpi_battery *battery; | |
34c4415a JK |
860 | if (!device) |
861 | return -EINVAL; | |
f1d4661a AS |
862 | battery = acpi_driver_data(device); |
863 | battery->update_time = 0; | |
508df92d | 864 | acpi_battery_update(battery); |
b6ce4083 | 865 | return 0; |
34c4415a JK |
866 | } |
867 | ||
aa650bbd AS |
868 | static struct acpi_driver acpi_battery_driver = { |
869 | .name = "battery", | |
870 | .class = ACPI_BATTERY_CLASS, | |
871 | .ids = battery_device_ids, | |
872 | .ops = { | |
873 | .add = acpi_battery_add, | |
874 | .resume = acpi_battery_resume, | |
875 | .remove = acpi_battery_remove, | |
876 | }, | |
877 | }; | |
878 | ||
4be44fcd | 879 | static int __init acpi_battery_init(void) |
1da177e4 | 880 | { |
4d8316d5 PM |
881 | if (acpi_disabled) |
882 | return -ENODEV; | |
fdcedbba | 883 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 884 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 885 | if (!acpi_battery_dir) |
d550d98d | 886 | return -ENODEV; |
d7380965 | 887 | #endif |
aa650bbd | 888 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
fdcedbba | 889 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 890 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 891 | #endif |
d550d98d | 892 | return -ENODEV; |
1da177e4 | 893 | } |
d550d98d | 894 | return 0; |
1da177e4 LT |
895 | } |
896 | ||
4be44fcd | 897 | static void __exit acpi_battery_exit(void) |
1da177e4 | 898 | { |
1da177e4 | 899 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fdcedbba | 900 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 901 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 902 | #endif |
1da177e4 LT |
903 | } |
904 | ||
1da177e4 LT |
905 | module_init(acpi_battery_init); |
906 | module_exit(acpi_battery_exit); |