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1da177e4 LT |
1 | /* |
2 | * acpi_battery.c - ACPI Battery Driver ($Revision: 37 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/proc_fs.h> | |
31 | #include <linux/seq_file.h> | |
32 | #include <asm/uaccess.h> | |
33 | ||
34 | #include <acpi/acpi_bus.h> | |
35 | #include <acpi/acpi_drivers.h> | |
36 | ||
1da177e4 LT |
37 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
38 | ||
39 | #define ACPI_BATTERY_FORMAT_BIF "NNNNNNNNNSSSS" | |
40 | #define ACPI_BATTERY_FORMAT_BST "NNNN" | |
41 | ||
42 | #define ACPI_BATTERY_COMPONENT 0x00040000 | |
43 | #define ACPI_BATTERY_CLASS "battery" | |
44 | #define ACPI_BATTERY_HID "PNP0C0A" | |
1da177e4 LT |
45 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
46 | #define ACPI_BATTERY_FILE_INFO "info" | |
a1f0eff2 | 47 | #define ACPI_BATTERY_FILE_STATE "state" |
1da177e4 LT |
48 | #define ACPI_BATTERY_FILE_ALARM "alarm" |
49 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 | |
50 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
51 | #define ACPI_BATTERY_UNITS_WATTS "mW" | |
52 | #define ACPI_BATTERY_UNITS_AMPS "mA" | |
53 | ||
1da177e4 | 54 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
f52fd66d | 55 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 56 | |
f52fd66d | 57 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 58 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
59 | MODULE_LICENSE("GPL"); |
60 | ||
3f86b832 RT |
61 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
62 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
63 | ||
4be44fcd LB |
64 | static int acpi_battery_add(struct acpi_device *device); |
65 | static int acpi_battery_remove(struct acpi_device *device, int type); | |
5d9464a4 | 66 | static int acpi_battery_resume(struct acpi_device *device); |
1da177e4 LT |
67 | |
68 | static struct acpi_driver acpi_battery_driver = { | |
c2b6705b | 69 | .name = "battery", |
4be44fcd LB |
70 | .class = ACPI_BATTERY_CLASS, |
71 | .ids = ACPI_BATTERY_HID, | |
72 | .ops = { | |
73 | .add = acpi_battery_add, | |
34c4415a | 74 | .resume = acpi_battery_resume, |
4be44fcd LB |
75 | .remove = acpi_battery_remove, |
76 | }, | |
1da177e4 LT |
77 | }; |
78 | ||
a1f0eff2 | 79 | struct acpi_battery_state { |
4be44fcd LB |
80 | acpi_integer state; |
81 | acpi_integer present_rate; | |
82 | acpi_integer remaining_capacity; | |
83 | acpi_integer present_voltage; | |
1da177e4 LT |
84 | }; |
85 | ||
86 | struct acpi_battery_info { | |
4be44fcd LB |
87 | acpi_integer power_unit; |
88 | acpi_integer design_capacity; | |
89 | acpi_integer last_full_capacity; | |
90 | acpi_integer battery_technology; | |
91 | acpi_integer design_voltage; | |
92 | acpi_integer design_capacity_warning; | |
93 | acpi_integer design_capacity_low; | |
94 | acpi_integer battery_capacity_granularity_1; | |
95 | acpi_integer battery_capacity_granularity_2; | |
96 | acpi_string model_number; | |
97 | acpi_string serial_number; | |
98 | acpi_string battery_type; | |
99 | acpi_string oem_info; | |
1da177e4 LT |
100 | }; |
101 | ||
102 | struct acpi_battery_flags { | |
4be44fcd LB |
103 | u8 present:1; /* Bay occupied? */ |
104 | u8 power_unit:1; /* 0=watts, 1=apms */ | |
105 | u8 alarm:1; /* _BTP present? */ | |
106 | u8 reserved:5; | |
1da177e4 LT |
107 | }; |
108 | ||
109 | struct acpi_battery_trips { | |
4be44fcd LB |
110 | unsigned long warning; |
111 | unsigned long low; | |
1da177e4 LT |
112 | }; |
113 | ||
114 | struct acpi_battery { | |
145def84 | 115 | struct acpi_device * device; |
1da177e4 LT |
116 | struct acpi_battery_flags flags; |
117 | struct acpi_battery_trips trips; | |
4be44fcd | 118 | unsigned long alarm; |
1da177e4 LT |
119 | struct acpi_battery_info *info; |
120 | }; | |
121 | ||
1da177e4 LT |
122 | /* -------------------------------------------------------------------------- |
123 | Battery Management | |
124 | -------------------------------------------------------------------------- */ | |
125 | ||
126 | static int | |
4be44fcd LB |
127 | acpi_battery_get_info(struct acpi_battery *battery, |
128 | struct acpi_battery_info **bif) | |
1da177e4 | 129 | { |
4be44fcd LB |
130 | int result = 0; |
131 | acpi_status status = 0; | |
132 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
133 | struct acpi_buffer format = { sizeof(ACPI_BATTERY_FORMAT_BIF), | |
134 | ACPI_BATTERY_FORMAT_BIF | |
135 | }; | |
136 | struct acpi_buffer data = { 0, NULL }; | |
137 | union acpi_object *package = NULL; | |
1da177e4 | 138 | |
1da177e4 LT |
139 | |
140 | if (!battery || !bif) | |
d550d98d | 141 | return -EINVAL; |
1da177e4 LT |
142 | |
143 | /* Evalute _BIF */ | |
144 | ||
3b073ec3 | 145 | status = acpi_evaluate_object(battery->device->handle, "_BIF", NULL, &buffer); |
1da177e4 | 146 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 147 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
d550d98d | 148 | return -ENODEV; |
1da177e4 LT |
149 | } |
150 | ||
50dd0969 | 151 | package = buffer.pointer; |
1da177e4 LT |
152 | |
153 | /* Extract Package Data */ | |
154 | ||
155 | status = acpi_extract_package(package, &format, &data); | |
156 | if (status != AE_BUFFER_OVERFLOW) { | |
a6fc6720 | 157 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _BIF")); |
1da177e4 LT |
158 | result = -ENODEV; |
159 | goto end; | |
160 | } | |
161 | ||
36bcbec7 | 162 | data.pointer = kzalloc(data.length, GFP_KERNEL); |
1da177e4 LT |
163 | if (!data.pointer) { |
164 | result = -ENOMEM; | |
165 | goto end; | |
166 | } | |
1da177e4 LT |
167 | |
168 | status = acpi_extract_package(package, &format, &data); | |
169 | if (ACPI_FAILURE(status)) { | |
a6fc6720 | 170 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _BIF")); |
1da177e4 LT |
171 | kfree(data.pointer); |
172 | result = -ENODEV; | |
173 | goto end; | |
174 | } | |
175 | ||
4be44fcd | 176 | end: |
02438d87 | 177 | kfree(buffer.pointer); |
1da177e4 LT |
178 | |
179 | if (!result) | |
50dd0969 | 180 | (*bif) = data.pointer; |
1da177e4 | 181 | |
d550d98d | 182 | return result; |
1da177e4 LT |
183 | } |
184 | ||
185 | static int | |
a1f0eff2 VL |
186 | acpi_battery_get_state(struct acpi_battery *battery, |
187 | struct acpi_battery_state **bst) | |
1da177e4 | 188 | { |
4be44fcd LB |
189 | int result = 0; |
190 | acpi_status status = 0; | |
191 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
192 | struct acpi_buffer format = { sizeof(ACPI_BATTERY_FORMAT_BST), | |
193 | ACPI_BATTERY_FORMAT_BST | |
194 | }; | |
195 | struct acpi_buffer data = { 0, NULL }; | |
196 | union acpi_object *package = NULL; | |
1da177e4 | 197 | |
1da177e4 LT |
198 | |
199 | if (!battery || !bst) | |
d550d98d | 200 | return -EINVAL; |
1da177e4 LT |
201 | |
202 | /* Evalute _BST */ | |
203 | ||
3b073ec3 | 204 | status = acpi_evaluate_object(battery->device->handle, "_BST", NULL, &buffer); |
1da177e4 | 205 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 206 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 207 | return -ENODEV; |
1da177e4 LT |
208 | } |
209 | ||
50dd0969 | 210 | package = buffer.pointer; |
1da177e4 LT |
211 | |
212 | /* Extract Package Data */ | |
213 | ||
214 | status = acpi_extract_package(package, &format, &data); | |
215 | if (status != AE_BUFFER_OVERFLOW) { | |
a6fc6720 | 216 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _BST")); |
1da177e4 LT |
217 | result = -ENODEV; |
218 | goto end; | |
219 | } | |
220 | ||
36bcbec7 | 221 | data.pointer = kzalloc(data.length, GFP_KERNEL); |
1da177e4 LT |
222 | if (!data.pointer) { |
223 | result = -ENOMEM; | |
224 | goto end; | |
225 | } | |
1da177e4 LT |
226 | |
227 | status = acpi_extract_package(package, &format, &data); | |
228 | if (ACPI_FAILURE(status)) { | |
a6fc6720 | 229 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _BST")); |
1da177e4 LT |
230 | kfree(data.pointer); |
231 | result = -ENODEV; | |
232 | goto end; | |
233 | } | |
234 | ||
4be44fcd | 235 | end: |
02438d87 | 236 | kfree(buffer.pointer); |
1da177e4 LT |
237 | |
238 | if (!result) | |
50dd0969 | 239 | (*bst) = data.pointer; |
1da177e4 | 240 | |
d550d98d | 241 | return result; |
1da177e4 LT |
242 | } |
243 | ||
1da177e4 | 244 | static int |
4be44fcd | 245 | acpi_battery_set_alarm(struct acpi_battery *battery, unsigned long alarm) |
1da177e4 | 246 | { |
4be44fcd LB |
247 | acpi_status status = 0; |
248 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
249 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
1da177e4 | 250 | |
1da177e4 LT |
251 | |
252 | if (!battery) | |
d550d98d | 253 | return -EINVAL; |
1da177e4 LT |
254 | |
255 | if (!battery->flags.alarm) | |
d550d98d | 256 | return -ENODEV; |
1da177e4 LT |
257 | |
258 | arg0.integer.value = alarm; | |
259 | ||
3b073ec3 | 260 | status = acpi_evaluate_object(battery->device->handle, "_BTP", &arg_list, NULL); |
1da177e4 | 261 | if (ACPI_FAILURE(status)) |
d550d98d | 262 | return -ENODEV; |
1da177e4 LT |
263 | |
264 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", (u32) alarm)); | |
265 | ||
266 | battery->alarm = alarm; | |
267 | ||
d550d98d | 268 | return 0; |
1da177e4 LT |
269 | } |
270 | ||
4be44fcd | 271 | static int acpi_battery_check(struct acpi_battery *battery) |
1da177e4 | 272 | { |
4be44fcd LB |
273 | int result = 0; |
274 | acpi_status status = AE_OK; | |
275 | acpi_handle handle = NULL; | |
276 | struct acpi_device *device = NULL; | |
1da177e4 LT |
277 | struct acpi_battery_info *bif = NULL; |
278 | ||
4be44fcd | 279 | |
1da177e4 | 280 | if (!battery) |
d550d98d | 281 | return -EINVAL; |
1da177e4 | 282 | |
145def84 | 283 | device = battery->device; |
1da177e4 LT |
284 | |
285 | result = acpi_bus_get_status(device); | |
286 | if (result) | |
d550d98d | 287 | return result; |
1da177e4 LT |
288 | |
289 | /* Insertion? */ | |
290 | ||
291 | if (!battery->flags.present && device->status.battery_present) { | |
292 | ||
293 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Battery inserted\n")); | |
294 | ||
295 | /* Evalute _BIF to get certain static information */ | |
296 | ||
297 | result = acpi_battery_get_info(battery, &bif); | |
298 | if (result) | |
d550d98d | 299 | return result; |
1da177e4 LT |
300 | |
301 | battery->flags.power_unit = bif->power_unit; | |
302 | battery->trips.warning = bif->design_capacity_warning; | |
303 | battery->trips.low = bif->design_capacity_low; | |
304 | kfree(bif); | |
305 | ||
306 | /* See if alarms are supported, and if so, set default */ | |
307 | ||
3b073ec3 | 308 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
1da177e4 LT |
309 | if (ACPI_SUCCESS(status)) { |
310 | battery->flags.alarm = 1; | |
311 | acpi_battery_set_alarm(battery, battery->trips.warning); | |
312 | } | |
313 | } | |
314 | ||
315 | /* Removal? */ | |
316 | ||
317 | else if (battery->flags.present && !device->status.battery_present) { | |
318 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Battery removed\n")); | |
319 | } | |
320 | ||
321 | battery->flags.present = device->status.battery_present; | |
322 | ||
d550d98d | 323 | return result; |
1da177e4 LT |
324 | } |
325 | ||
4bd35cdb VL |
326 | static void acpi_battery_check_present(struct acpi_battery *battery) |
327 | { | |
328 | if (!battery->flags.present) { | |
329 | acpi_battery_check(battery); | |
330 | } | |
331 | } | |
332 | ||
1da177e4 LT |
333 | /* -------------------------------------------------------------------------- |
334 | FS Interface (/proc) | |
335 | -------------------------------------------------------------------------- */ | |
336 | ||
4be44fcd | 337 | static struct proc_dir_entry *acpi_battery_dir; |
1da177e4 LT |
338 | static int acpi_battery_read_info(struct seq_file *seq, void *offset) |
339 | { | |
4be44fcd | 340 | int result = 0; |
50dd0969 | 341 | struct acpi_battery *battery = seq->private; |
1da177e4 | 342 | struct acpi_battery_info *bif = NULL; |
4be44fcd | 343 | char *units = "?"; |
1da177e4 | 344 | |
1da177e4 LT |
345 | |
346 | if (!battery) | |
347 | goto end; | |
348 | ||
4bd35cdb VL |
349 | acpi_battery_check_present(battery); |
350 | ||
1da177e4 LT |
351 | if (battery->flags.present) |
352 | seq_printf(seq, "present: yes\n"); | |
353 | else { | |
354 | seq_printf(seq, "present: no\n"); | |
355 | goto end; | |
356 | } | |
357 | ||
358 | /* Battery Info (_BIF) */ | |
359 | ||
360 | result = acpi_battery_get_info(battery, &bif); | |
361 | if (result || !bif) { | |
362 | seq_printf(seq, "ERROR: Unable to read battery information\n"); | |
363 | goto end; | |
364 | } | |
365 | ||
4be44fcd LB |
366 | units = |
367 | bif-> | |
368 | power_unit ? ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS; | |
369 | ||
1da177e4 LT |
370 | if (bif->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
371 | seq_printf(seq, "design capacity: unknown\n"); | |
372 | else | |
373 | seq_printf(seq, "design capacity: %d %sh\n", | |
4be44fcd | 374 | (u32) bif->design_capacity, units); |
1da177e4 LT |
375 | |
376 | if (bif->last_full_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
377 | seq_printf(seq, "last full capacity: unknown\n"); | |
378 | else | |
379 | seq_printf(seq, "last full capacity: %d %sh\n", | |
4be44fcd | 380 | (u32) bif->last_full_capacity, units); |
1da177e4 LT |
381 | |
382 | switch ((u32) bif->battery_technology) { | |
383 | case 0: | |
384 | seq_printf(seq, "battery technology: non-rechargeable\n"); | |
385 | break; | |
386 | case 1: | |
387 | seq_printf(seq, "battery technology: rechargeable\n"); | |
388 | break; | |
389 | default: | |
390 | seq_printf(seq, "battery technology: unknown\n"); | |
391 | break; | |
392 | } | |
393 | ||
394 | if (bif->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
395 | seq_printf(seq, "design voltage: unknown\n"); | |
396 | else | |
397 | seq_printf(seq, "design voltage: %d mV\n", | |
4be44fcd LB |
398 | (u32) bif->design_voltage); |
399 | ||
1da177e4 | 400 | seq_printf(seq, "design capacity warning: %d %sh\n", |
4be44fcd | 401 | (u32) bif->design_capacity_warning, units); |
1da177e4 | 402 | seq_printf(seq, "design capacity low: %d %sh\n", |
4be44fcd | 403 | (u32) bif->design_capacity_low, units); |
1da177e4 | 404 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
4be44fcd | 405 | (u32) bif->battery_capacity_granularity_1, units); |
1da177e4 | 406 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
4be44fcd LB |
407 | (u32) bif->battery_capacity_granularity_2, units); |
408 | seq_printf(seq, "model number: %s\n", bif->model_number); | |
409 | seq_printf(seq, "serial number: %s\n", bif->serial_number); | |
410 | seq_printf(seq, "battery type: %s\n", bif->battery_type); | |
411 | seq_printf(seq, "OEM info: %s\n", bif->oem_info); | |
412 | ||
413 | end: | |
1da177e4 LT |
414 | kfree(bif); |
415 | ||
d550d98d | 416 | return 0; |
1da177e4 LT |
417 | } |
418 | ||
419 | static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) | |
420 | { | |
421 | return single_open(file, acpi_battery_read_info, PDE(inode)->data); | |
422 | } | |
423 | ||
4be44fcd | 424 | static int acpi_battery_read_state(struct seq_file *seq, void *offset) |
1da177e4 | 425 | { |
4be44fcd | 426 | int result = 0; |
50dd0969 | 427 | struct acpi_battery *battery = seq->private; |
a1f0eff2 | 428 | struct acpi_battery_state *bst = NULL; |
4be44fcd | 429 | char *units = "?"; |
1da177e4 | 430 | |
1da177e4 LT |
431 | |
432 | if (!battery) | |
433 | goto end; | |
434 | ||
4bd35cdb VL |
435 | acpi_battery_check_present(battery); |
436 | ||
1da177e4 LT |
437 | if (battery->flags.present) |
438 | seq_printf(seq, "present: yes\n"); | |
439 | else { | |
440 | seq_printf(seq, "present: no\n"); | |
441 | goto end; | |
442 | } | |
443 | ||
444 | /* Battery Units */ | |
445 | ||
4be44fcd LB |
446 | units = |
447 | battery->flags. | |
448 | power_unit ? ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS; | |
1da177e4 LT |
449 | |
450 | /* Battery Status (_BST) */ | |
451 | ||
a1f0eff2 | 452 | result = acpi_battery_get_state(battery, &bst); |
1da177e4 | 453 | if (result || !bst) { |
a1f0eff2 | 454 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
1da177e4 LT |
455 | goto end; |
456 | } | |
457 | ||
458 | if (!(bst->state & 0x04)) | |
459 | seq_printf(seq, "capacity state: ok\n"); | |
460 | else | |
461 | seq_printf(seq, "capacity state: critical\n"); | |
462 | ||
4be44fcd LB |
463 | if ((bst->state & 0x01) && (bst->state & 0x02)) { |
464 | seq_printf(seq, | |
465 | "charging state: charging/discharging\n"); | |
4be44fcd | 466 | } else if (bst->state & 0x01) |
1da177e4 LT |
467 | seq_printf(seq, "charging state: discharging\n"); |
468 | else if (bst->state & 0x02) | |
469 | seq_printf(seq, "charging state: charging\n"); | |
470 | else { | |
471 | seq_printf(seq, "charging state: charged\n"); | |
472 | } | |
473 | ||
474 | if (bst->present_rate == ACPI_BATTERY_VALUE_UNKNOWN) | |
475 | seq_printf(seq, "present rate: unknown\n"); | |
476 | else | |
477 | seq_printf(seq, "present rate: %d %s\n", | |
4be44fcd | 478 | (u32) bst->present_rate, units); |
1da177e4 LT |
479 | |
480 | if (bst->remaining_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
481 | seq_printf(seq, "remaining capacity: unknown\n"); | |
482 | else | |
483 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
4be44fcd | 484 | (u32) bst->remaining_capacity, units); |
1da177e4 LT |
485 | |
486 | if (bst->present_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
487 | seq_printf(seq, "present voltage: unknown\n"); | |
488 | else | |
489 | seq_printf(seq, "present voltage: %d mV\n", | |
4be44fcd | 490 | (u32) bst->present_voltage); |
1da177e4 | 491 | |
4be44fcd | 492 | end: |
1da177e4 LT |
493 | kfree(bst); |
494 | ||
d550d98d | 495 | return 0; |
1da177e4 LT |
496 | } |
497 | ||
498 | static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) | |
499 | { | |
500 | return single_open(file, acpi_battery_read_state, PDE(inode)->data); | |
501 | } | |
502 | ||
4be44fcd | 503 | static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) |
1da177e4 | 504 | { |
50dd0969 | 505 | struct acpi_battery *battery = seq->private; |
4be44fcd | 506 | char *units = "?"; |
1da177e4 | 507 | |
1da177e4 LT |
508 | |
509 | if (!battery) | |
510 | goto end; | |
511 | ||
4bd35cdb VL |
512 | acpi_battery_check_present(battery); |
513 | ||
1da177e4 LT |
514 | if (!battery->flags.present) { |
515 | seq_printf(seq, "present: no\n"); | |
516 | goto end; | |
517 | } | |
518 | ||
519 | /* Battery Units */ | |
4be44fcd LB |
520 | |
521 | units = | |
522 | battery->flags. | |
523 | power_unit ? ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS; | |
1da177e4 LT |
524 | |
525 | /* Battery Alarm */ | |
526 | ||
527 | seq_printf(seq, "alarm: "); | |
528 | if (!battery->alarm) | |
529 | seq_printf(seq, "unsupported\n"); | |
530 | else | |
531 | seq_printf(seq, "%d %sh\n", (u32) battery->alarm, units); | |
532 | ||
4be44fcd | 533 | end: |
d550d98d | 534 | return 0; |
1da177e4 LT |
535 | } |
536 | ||
1da177e4 | 537 | static ssize_t |
4be44fcd LB |
538 | acpi_battery_write_alarm(struct file *file, |
539 | const char __user * buffer, | |
540 | size_t count, loff_t * ppos) | |
1da177e4 | 541 | { |
4be44fcd LB |
542 | int result = 0; |
543 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
544 | struct seq_file *m = file->private_data; |
545 | struct acpi_battery *battery = m->private; | |
1da177e4 | 546 | |
1da177e4 LT |
547 | |
548 | if (!battery || (count > sizeof(alarm_string) - 1)) | |
d550d98d | 549 | return -EINVAL; |
1da177e4 | 550 | |
4bd35cdb VL |
551 | acpi_battery_check_present(battery); |
552 | ||
1da177e4 | 553 | if (!battery->flags.present) |
d550d98d | 554 | return -ENODEV; |
1da177e4 LT |
555 | |
556 | if (copy_from_user(alarm_string, buffer, count)) | |
d550d98d | 557 | return -EFAULT; |
4be44fcd | 558 | |
1da177e4 LT |
559 | alarm_string[count] = '\0'; |
560 | ||
4be44fcd LB |
561 | result = acpi_battery_set_alarm(battery, |
562 | simple_strtoul(alarm_string, NULL, 0)); | |
1da177e4 | 563 | if (result) |
d550d98d | 564 | return result; |
1da177e4 | 565 | |
d550d98d | 566 | return count; |
1da177e4 LT |
567 | } |
568 | ||
569 | static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) | |
570 | { | |
571 | return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); | |
572 | } | |
573 | ||
d7508032 | 574 | static const struct file_operations acpi_battery_info_ops = { |
4be44fcd LB |
575 | .open = acpi_battery_info_open_fs, |
576 | .read = seq_read, | |
577 | .llseek = seq_lseek, | |
578 | .release = single_release, | |
1da177e4 LT |
579 | .owner = THIS_MODULE, |
580 | }; | |
581 | ||
d7508032 | 582 | static const struct file_operations acpi_battery_state_ops = { |
4be44fcd LB |
583 | .open = acpi_battery_state_open_fs, |
584 | .read = seq_read, | |
585 | .llseek = seq_lseek, | |
586 | .release = single_release, | |
1da177e4 LT |
587 | .owner = THIS_MODULE, |
588 | }; | |
589 | ||
d7508032 | 590 | static const struct file_operations acpi_battery_alarm_ops = { |
4be44fcd LB |
591 | .open = acpi_battery_alarm_open_fs, |
592 | .read = seq_read, | |
593 | .write = acpi_battery_write_alarm, | |
594 | .llseek = seq_lseek, | |
595 | .release = single_release, | |
1da177e4 LT |
596 | .owner = THIS_MODULE, |
597 | }; | |
598 | ||
4be44fcd | 599 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 600 | { |
4be44fcd | 601 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 602 | |
1da177e4 LT |
603 | |
604 | if (!acpi_device_dir(device)) { | |
605 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 606 | acpi_battery_dir); |
1da177e4 | 607 | if (!acpi_device_dir(device)) |
d550d98d | 608 | return -ENODEV; |
1da177e4 LT |
609 | acpi_device_dir(device)->owner = THIS_MODULE; |
610 | } | |
611 | ||
612 | /* 'info' [R] */ | |
613 | entry = create_proc_entry(ACPI_BATTERY_FILE_INFO, | |
4be44fcd | 614 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 615 | if (!entry) |
d550d98d | 616 | return -ENODEV; |
1da177e4 | 617 | else { |
4be44fcd | 618 | entry->proc_fops = &acpi_battery_info_ops; |
1da177e4 LT |
619 | entry->data = acpi_driver_data(device); |
620 | entry->owner = THIS_MODULE; | |
621 | } | |
622 | ||
623 | /* 'status' [R] */ | |
a1f0eff2 | 624 | entry = create_proc_entry(ACPI_BATTERY_FILE_STATE, |
4be44fcd | 625 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 626 | if (!entry) |
d550d98d | 627 | return -ENODEV; |
1da177e4 LT |
628 | else { |
629 | entry->proc_fops = &acpi_battery_state_ops; | |
630 | entry->data = acpi_driver_data(device); | |
631 | entry->owner = THIS_MODULE; | |
632 | } | |
633 | ||
634 | /* 'alarm' [R/W] */ | |
635 | entry = create_proc_entry(ACPI_BATTERY_FILE_ALARM, | |
4be44fcd LB |
636 | S_IFREG | S_IRUGO | S_IWUSR, |
637 | acpi_device_dir(device)); | |
1da177e4 | 638 | if (!entry) |
d550d98d | 639 | return -ENODEV; |
1da177e4 LT |
640 | else { |
641 | entry->proc_fops = &acpi_battery_alarm_ops; | |
642 | entry->data = acpi_driver_data(device); | |
643 | entry->owner = THIS_MODULE; | |
644 | } | |
645 | ||
d550d98d | 646 | return 0; |
1da177e4 LT |
647 | } |
648 | ||
4be44fcd | 649 | static int acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 650 | { |
1da177e4 LT |
651 | |
652 | if (acpi_device_dir(device)) { | |
653 | remove_proc_entry(ACPI_BATTERY_FILE_ALARM, | |
654 | acpi_device_dir(device)); | |
a1f0eff2 | 655 | remove_proc_entry(ACPI_BATTERY_FILE_STATE, |
1da177e4 LT |
656 | acpi_device_dir(device)); |
657 | remove_proc_entry(ACPI_BATTERY_FILE_INFO, | |
658 | acpi_device_dir(device)); | |
659 | ||
660 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); | |
661 | acpi_device_dir(device) = NULL; | |
662 | } | |
663 | ||
d550d98d | 664 | return 0; |
1da177e4 LT |
665 | } |
666 | ||
1da177e4 LT |
667 | /* -------------------------------------------------------------------------- |
668 | Driver Interface | |
669 | -------------------------------------------------------------------------- */ | |
670 | ||
4be44fcd | 671 | static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 672 | { |
50dd0969 | 673 | struct acpi_battery *battery = data; |
4be44fcd | 674 | struct acpi_device *device = NULL; |
1da177e4 | 675 | |
1da177e4 LT |
676 | |
677 | if (!battery) | |
d550d98d | 678 | return; |
1da177e4 | 679 | |
145def84 | 680 | device = battery->device; |
1da177e4 LT |
681 | |
682 | switch (event) { | |
683 | case ACPI_BATTERY_NOTIFY_STATUS: | |
684 | case ACPI_BATTERY_NOTIFY_INFO: | |
9fdae727 VL |
685 | case ACPI_NOTIFY_BUS_CHECK: |
686 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1da177e4 LT |
687 | acpi_battery_check(battery); |
688 | acpi_bus_generate_event(device, event, battery->flags.present); | |
689 | break; | |
690 | default: | |
691 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 692 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
693 | break; |
694 | } | |
695 | ||
d550d98d | 696 | return; |
1da177e4 LT |
697 | } |
698 | ||
4be44fcd | 699 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 700 | { |
4be44fcd LB |
701 | int result = 0; |
702 | acpi_status status = 0; | |
703 | struct acpi_battery *battery = NULL; | |
1da177e4 | 704 | |
4be44fcd | 705 | |
1da177e4 | 706 | if (!device) |
d550d98d | 707 | return -EINVAL; |
1da177e4 | 708 | |
36bcbec7 | 709 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 710 | if (!battery) |
d550d98d | 711 | return -ENOMEM; |
1da177e4 | 712 | |
145def84 | 713 | battery->device = device; |
1da177e4 LT |
714 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
715 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
716 | acpi_driver_data(device) = battery; | |
717 | ||
718 | result = acpi_battery_check(battery); | |
719 | if (result) | |
720 | goto end; | |
721 | ||
722 | result = acpi_battery_add_fs(device); | |
723 | if (result) | |
724 | goto end; | |
725 | ||
3b073ec3 | 726 | status = acpi_install_notify_handler(device->handle, |
9fdae727 | 727 | ACPI_ALL_NOTIFY, |
4be44fcd | 728 | acpi_battery_notify, battery); |
1da177e4 | 729 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
730 | result = -ENODEV; |
731 | goto end; | |
732 | } | |
733 | ||
734 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", | |
4be44fcd LB |
735 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
736 | device->status.battery_present ? "present" : "absent"); | |
737 | ||
738 | end: | |
1da177e4 LT |
739 | if (result) { |
740 | acpi_battery_remove_fs(device); | |
741 | kfree(battery); | |
742 | } | |
743 | ||
d550d98d | 744 | return result; |
1da177e4 LT |
745 | } |
746 | ||
4be44fcd | 747 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 748 | { |
4be44fcd LB |
749 | acpi_status status = 0; |
750 | struct acpi_battery *battery = NULL; | |
1da177e4 | 751 | |
1da177e4 LT |
752 | |
753 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 754 | return -EINVAL; |
1da177e4 | 755 | |
50dd0969 | 756 | battery = acpi_driver_data(device); |
1da177e4 | 757 | |
3b073ec3 | 758 | status = acpi_remove_notify_handler(device->handle, |
9fdae727 | 759 | ACPI_ALL_NOTIFY, |
4be44fcd | 760 | acpi_battery_notify); |
1da177e4 LT |
761 | |
762 | acpi_battery_remove_fs(device); | |
763 | ||
764 | kfree(battery); | |
765 | ||
d550d98d | 766 | return 0; |
1da177e4 LT |
767 | } |
768 | ||
34c4415a | 769 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 770 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
771 | { |
772 | struct acpi_battery *battery; | |
773 | ||
774 | if (!device) | |
775 | return -EINVAL; | |
776 | ||
777 | battery = device->driver_data; | |
778 | return acpi_battery_check(battery); | |
779 | } | |
780 | ||
4be44fcd | 781 | static int __init acpi_battery_init(void) |
1da177e4 | 782 | { |
3f86b832 | 783 | int result; |
1da177e4 | 784 | |
4d8316d5 PM |
785 | if (acpi_disabled) |
786 | return -ENODEV; | |
787 | ||
3f86b832 | 788 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 789 | if (!acpi_battery_dir) |
d550d98d | 790 | return -ENODEV; |
1da177e4 LT |
791 | |
792 | result = acpi_bus_register_driver(&acpi_battery_driver); | |
793 | if (result < 0) { | |
3f86b832 | 794 | acpi_unlock_battery_dir(acpi_battery_dir); |
d550d98d | 795 | return -ENODEV; |
1da177e4 LT |
796 | } |
797 | ||
d550d98d | 798 | return 0; |
1da177e4 LT |
799 | } |
800 | ||
4be44fcd | 801 | static void __exit acpi_battery_exit(void) |
1da177e4 | 802 | { |
1da177e4 LT |
803 | |
804 | acpi_bus_unregister_driver(&acpi_battery_driver); | |
805 | ||
3f86b832 | 806 | acpi_unlock_battery_dir(acpi_battery_dir); |
1da177e4 | 807 | |
d550d98d | 808 | return; |
1da177e4 LT |
809 | } |
810 | ||
1da177e4 LT |
811 | module_init(acpi_battery_init); |
812 | module_exit(acpi_battery_exit); |