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