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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 | ||
37 | ||
38 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF | |
39 | ||
40 | #define ACPI_BATTERY_FORMAT_BIF "NNNNNNNNNSSSS" | |
41 | #define ACPI_BATTERY_FORMAT_BST "NNNN" | |
42 | ||
43 | #define ACPI_BATTERY_COMPONENT 0x00040000 | |
44 | #define ACPI_BATTERY_CLASS "battery" | |
45 | #define ACPI_BATTERY_HID "PNP0C0A" | |
46 | #define ACPI_BATTERY_DRIVER_NAME "ACPI Battery Driver" | |
47 | #define ACPI_BATTERY_DEVICE_NAME "Battery" | |
48 | #define ACPI_BATTERY_FILE_INFO "info" | |
49 | #define ACPI_BATTERY_FILE_STATUS "state" | |
50 | #define ACPI_BATTERY_FILE_ALARM "alarm" | |
51 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 | |
52 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
53 | #define ACPI_BATTERY_UNITS_WATTS "mW" | |
54 | #define ACPI_BATTERY_UNITS_AMPS "mA" | |
55 | ||
56 | ||
57 | #define _COMPONENT ACPI_BATTERY_COMPONENT | |
58 | ACPI_MODULE_NAME ("acpi_battery") | |
59 | ||
60 | MODULE_AUTHOR("Paul Diefenbaugh"); | |
61 | MODULE_DESCRIPTION(ACPI_BATTERY_DRIVER_NAME); | |
62 | MODULE_LICENSE("GPL"); | |
63 | ||
64 | static int acpi_battery_add (struct acpi_device *device); | |
65 | static int acpi_battery_remove (struct acpi_device *device, int type); | |
66 | ||
67 | static struct acpi_driver acpi_battery_driver = { | |
68 | .name = ACPI_BATTERY_DRIVER_NAME, | |
69 | .class = ACPI_BATTERY_CLASS, | |
70 | .ids = ACPI_BATTERY_HID, | |
71 | .ops = { | |
72 | .add = acpi_battery_add, | |
73 | .remove = acpi_battery_remove, | |
74 | }, | |
75 | }; | |
76 | ||
77 | struct acpi_battery_status { | |
78 | acpi_integer state; | |
79 | acpi_integer present_rate; | |
80 | acpi_integer remaining_capacity; | |
81 | acpi_integer present_voltage; | |
82 | }; | |
83 | ||
84 | struct acpi_battery_info { | |
85 | acpi_integer power_unit; | |
86 | acpi_integer design_capacity; | |
87 | acpi_integer last_full_capacity; | |
88 | acpi_integer battery_technology; | |
89 | acpi_integer design_voltage; | |
90 | acpi_integer design_capacity_warning; | |
91 | acpi_integer design_capacity_low; | |
92 | acpi_integer battery_capacity_granularity_1; | |
93 | acpi_integer battery_capacity_granularity_2; | |
94 | acpi_string model_number; | |
95 | acpi_string serial_number; | |
96 | acpi_string battery_type; | |
97 | acpi_string oem_info; | |
98 | }; | |
99 | ||
100 | struct acpi_battery_flags { | |
101 | u8 present:1; /* Bay occupied? */ | |
102 | u8 power_unit:1; /* 0=watts, 1=apms */ | |
103 | u8 alarm:1; /* _BTP present? */ | |
104 | u8 reserved:5; | |
105 | }; | |
106 | ||
107 | struct acpi_battery_trips { | |
108 | unsigned long warning; | |
109 | unsigned long low; | |
110 | }; | |
111 | ||
112 | struct acpi_battery { | |
113 | acpi_handle handle; | |
114 | struct acpi_battery_flags flags; | |
115 | struct acpi_battery_trips trips; | |
116 | unsigned long alarm; | |
117 | struct acpi_battery_info *info; | |
118 | }; | |
119 | ||
120 | ||
121 | /* -------------------------------------------------------------------------- | |
122 | Battery Management | |
123 | -------------------------------------------------------------------------- */ | |
124 | ||
125 | static int | |
126 | acpi_battery_get_info ( | |
127 | struct acpi_battery *battery, | |
128 | struct acpi_battery_info **bif) | |
129 | { | |
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 | struct acpi_buffer data = {0, NULL}; | |
136 | union acpi_object *package = NULL; | |
137 | ||
138 | ACPI_FUNCTION_TRACE("acpi_battery_get_info"); | |
139 | ||
140 | if (!battery || !bif) | |
141 | return_VALUE(-EINVAL); | |
142 | ||
143 | /* Evalute _BIF */ | |
144 | ||
145 | status = acpi_evaluate_object(battery->handle, "_BIF", NULL, &buffer); | |
146 | if (ACPI_FAILURE(status)) { | |
147 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _BIF\n")); | |
148 | return_VALUE(-ENODEV); | |
149 | } | |
150 | ||
151 | package = (union acpi_object *) buffer.pointer; | |
152 | ||
153 | /* Extract Package Data */ | |
154 | ||
155 | status = acpi_extract_package(package, &format, &data); | |
156 | if (status != AE_BUFFER_OVERFLOW) { | |
157 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error extracting _BIF\n")); | |
158 | result = -ENODEV; | |
159 | goto end; | |
160 | } | |
161 | ||
162 | data.pointer = kmalloc(data.length, GFP_KERNEL); | |
163 | if (!data.pointer) { | |
164 | result = -ENOMEM; | |
165 | goto end; | |
166 | } | |
167 | memset(data.pointer, 0, data.length); | |
168 | ||
169 | status = acpi_extract_package(package, &format, &data); | |
170 | if (ACPI_FAILURE(status)) { | |
171 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error extracting _BIF\n")); | |
172 | kfree(data.pointer); | |
173 | result = -ENODEV; | |
174 | goto end; | |
175 | } | |
176 | ||
177 | end: | |
178 | acpi_os_free(buffer.pointer); | |
179 | ||
180 | if (!result) | |
181 | (*bif) = (struct acpi_battery_info *) data.pointer; | |
182 | ||
183 | return_VALUE(result); | |
184 | } | |
185 | ||
186 | static int | |
187 | acpi_battery_get_status ( | |
188 | struct acpi_battery *battery, | |
189 | struct acpi_battery_status **bst) | |
190 | { | |
191 | int result = 0; | |
192 | acpi_status status = 0; | |
193 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
194 | struct acpi_buffer format = {sizeof(ACPI_BATTERY_FORMAT_BST), | |
195 | ACPI_BATTERY_FORMAT_BST}; | |
196 | struct acpi_buffer data = {0, NULL}; | |
197 | union acpi_object *package = NULL; | |
198 | ||
199 | ACPI_FUNCTION_TRACE("acpi_battery_get_status"); | |
200 | ||
201 | if (!battery || !bst) | |
202 | return_VALUE(-EINVAL); | |
203 | ||
204 | /* Evalute _BST */ | |
205 | ||
206 | status = acpi_evaluate_object(battery->handle, "_BST", NULL, &buffer); | |
207 | if (ACPI_FAILURE(status)) { | |
208 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _BST\n")); | |
209 | return_VALUE(-ENODEV); | |
210 | } | |
211 | ||
212 | package = (union acpi_object *) buffer.pointer; | |
213 | ||
214 | /* Extract Package Data */ | |
215 | ||
216 | status = acpi_extract_package(package, &format, &data); | |
217 | if (status != AE_BUFFER_OVERFLOW) { | |
218 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error extracting _BST\n")); | |
219 | result = -ENODEV; | |
220 | goto end; | |
221 | } | |
222 | ||
223 | data.pointer = kmalloc(data.length, GFP_KERNEL); | |
224 | if (!data.pointer) { | |
225 | result = -ENOMEM; | |
226 | goto end; | |
227 | } | |
228 | memset(data.pointer, 0, data.length); | |
229 | ||
230 | status = acpi_extract_package(package, &format, &data); | |
231 | if (ACPI_FAILURE(status)) { | |
232 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error extracting _BST\n")); | |
233 | kfree(data.pointer); | |
234 | result = -ENODEV; | |
235 | goto end; | |
236 | } | |
237 | ||
238 | end: | |
239 | acpi_os_free(buffer.pointer); | |
240 | ||
241 | if (!result) | |
242 | (*bst) = (struct acpi_battery_status *) data.pointer; | |
243 | ||
244 | return_VALUE(result); | |
245 | } | |
246 | ||
247 | ||
248 | static int | |
249 | acpi_battery_set_alarm ( | |
250 | struct acpi_battery *battery, | |
251 | unsigned long alarm) | |
252 | { | |
253 | acpi_status status = 0; | |
254 | union acpi_object arg0 = {ACPI_TYPE_INTEGER}; | |
255 | struct acpi_object_list arg_list = {1, &arg0}; | |
256 | ||
257 | ACPI_FUNCTION_TRACE("acpi_battery_set_alarm"); | |
258 | ||
259 | if (!battery) | |
260 | return_VALUE(-EINVAL); | |
261 | ||
262 | if (!battery->flags.alarm) | |
263 | return_VALUE(-ENODEV); | |
264 | ||
265 | arg0.integer.value = alarm; | |
266 | ||
267 | status = acpi_evaluate_object(battery->handle, "_BTP", &arg_list, NULL); | |
268 | if (ACPI_FAILURE(status)) | |
269 | return_VALUE(-ENODEV); | |
270 | ||
271 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", (u32) alarm)); | |
272 | ||
273 | battery->alarm = alarm; | |
274 | ||
275 | return_VALUE(0); | |
276 | } | |
277 | ||
278 | ||
279 | static int | |
280 | acpi_battery_check ( | |
281 | struct acpi_battery *battery) | |
282 | { | |
283 | int result = 0; | |
284 | acpi_status status = AE_OK; | |
285 | acpi_handle handle = NULL; | |
286 | struct acpi_device *device = NULL; | |
287 | struct acpi_battery_info *bif = NULL; | |
288 | ||
289 | ACPI_FUNCTION_TRACE("acpi_battery_check"); | |
290 | ||
291 | if (!battery) | |
292 | return_VALUE(-EINVAL); | |
293 | ||
294 | result = acpi_bus_get_device(battery->handle, &device); | |
295 | if (result) | |
296 | return_VALUE(result); | |
297 | ||
298 | result = acpi_bus_get_status(device); | |
299 | if (result) | |
300 | return_VALUE(result); | |
301 | ||
302 | /* Insertion? */ | |
303 | ||
304 | if (!battery->flags.present && device->status.battery_present) { | |
305 | ||
306 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Battery inserted\n")); | |
307 | ||
308 | /* Evalute _BIF to get certain static information */ | |
309 | ||
310 | result = acpi_battery_get_info(battery, &bif); | |
311 | if (result) | |
312 | return_VALUE(result); | |
313 | ||
314 | battery->flags.power_unit = bif->power_unit; | |
315 | battery->trips.warning = bif->design_capacity_warning; | |
316 | battery->trips.low = bif->design_capacity_low; | |
317 | kfree(bif); | |
318 | ||
319 | /* See if alarms are supported, and if so, set default */ | |
320 | ||
321 | status = acpi_get_handle(battery->handle, "_BTP", &handle); | |
322 | if (ACPI_SUCCESS(status)) { | |
323 | battery->flags.alarm = 1; | |
324 | acpi_battery_set_alarm(battery, battery->trips.warning); | |
325 | } | |
326 | } | |
327 | ||
328 | /* Removal? */ | |
329 | ||
330 | else if (battery->flags.present && !device->status.battery_present) { | |
331 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Battery removed\n")); | |
332 | } | |
333 | ||
334 | battery->flags.present = device->status.battery_present; | |
335 | ||
336 | return_VALUE(result); | |
337 | } | |
338 | ||
339 | ||
340 | /* -------------------------------------------------------------------------- | |
341 | FS Interface (/proc) | |
342 | -------------------------------------------------------------------------- */ | |
343 | ||
344 | static struct proc_dir_entry *acpi_battery_dir; | |
345 | static int acpi_battery_read_info(struct seq_file *seq, void *offset) | |
346 | { | |
347 | int result = 0; | |
348 | struct acpi_battery *battery = (struct acpi_battery *) seq->private; | |
349 | struct acpi_battery_info *bif = NULL; | |
350 | char *units = "?"; | |
351 | ||
352 | ACPI_FUNCTION_TRACE("acpi_battery_read_info"); | |
353 | ||
354 | if (!battery) | |
355 | goto end; | |
356 | ||
357 | if (battery->flags.present) | |
358 | seq_printf(seq, "present: yes\n"); | |
359 | else { | |
360 | seq_printf(seq, "present: no\n"); | |
361 | goto end; | |
362 | } | |
363 | ||
364 | /* Battery Info (_BIF) */ | |
365 | ||
366 | result = acpi_battery_get_info(battery, &bif); | |
367 | if (result || !bif) { | |
368 | seq_printf(seq, "ERROR: Unable to read battery information\n"); | |
369 | goto end; | |
370 | } | |
371 | ||
372 | units = bif->power_unit ? ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS; | |
373 | ||
374 | if (bif->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
375 | seq_printf(seq, "design capacity: unknown\n"); | |
376 | else | |
377 | seq_printf(seq, "design capacity: %d %sh\n", | |
378 | (u32) bif->design_capacity, units); | |
379 | ||
380 | if (bif->last_full_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
381 | seq_printf(seq, "last full capacity: unknown\n"); | |
382 | else | |
383 | seq_printf(seq, "last full capacity: %d %sh\n", | |
384 | (u32) bif->last_full_capacity, units); | |
385 | ||
386 | switch ((u32) bif->battery_technology) { | |
387 | case 0: | |
388 | seq_printf(seq, "battery technology: non-rechargeable\n"); | |
389 | break; | |
390 | case 1: | |
391 | seq_printf(seq, "battery technology: rechargeable\n"); | |
392 | break; | |
393 | default: | |
394 | seq_printf(seq, "battery technology: unknown\n"); | |
395 | break; | |
396 | } | |
397 | ||
398 | if (bif->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
399 | seq_printf(seq, "design voltage: unknown\n"); | |
400 | else | |
401 | seq_printf(seq, "design voltage: %d mV\n", | |
402 | (u32) bif->design_voltage); | |
403 | ||
404 | seq_printf(seq, "design capacity warning: %d %sh\n", | |
405 | (u32) bif->design_capacity_warning, units); | |
406 | seq_printf(seq, "design capacity low: %d %sh\n", | |
407 | (u32) bif->design_capacity_low, units); | |
408 | seq_printf(seq, "capacity granularity 1: %d %sh\n", | |
409 | (u32) bif->battery_capacity_granularity_1, units); | |
410 | seq_printf(seq, "capacity granularity 2: %d %sh\n", | |
411 | (u32) bif->battery_capacity_granularity_2, units); | |
412 | seq_printf(seq, "model number: %s\n", | |
413 | bif->model_number); | |
414 | seq_printf(seq, "serial number: %s\n", | |
415 | bif->serial_number); | |
416 | seq_printf(seq, "battery type: %s\n", | |
417 | bif->battery_type); | |
418 | seq_printf(seq, "OEM info: %s\n", | |
419 | bif->oem_info); | |
420 | ||
421 | end: | |
422 | kfree(bif); | |
423 | ||
424 | return_VALUE(0); | |
425 | } | |
426 | ||
427 | static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) | |
428 | { | |
429 | return single_open(file, acpi_battery_read_info, PDE(inode)->data); | |
430 | } | |
431 | ||
432 | ||
433 | static int | |
434 | acpi_battery_read_state (struct seq_file *seq, void *offset) | |
435 | { | |
436 | int result = 0; | |
437 | struct acpi_battery *battery = (struct acpi_battery *) seq->private; | |
438 | struct acpi_battery_status *bst = NULL; | |
439 | char *units = "?"; | |
440 | ||
441 | ACPI_FUNCTION_TRACE("acpi_battery_read_state"); | |
442 | ||
443 | if (!battery) | |
444 | goto end; | |
445 | ||
446 | if (battery->flags.present) | |
447 | seq_printf(seq, "present: yes\n"); | |
448 | else { | |
449 | seq_printf(seq, "present: no\n"); | |
450 | goto end; | |
451 | } | |
452 | ||
453 | /* Battery Units */ | |
454 | ||
455 | units = battery->flags.power_unit ? ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS; | |
456 | ||
457 | /* Battery Status (_BST) */ | |
458 | ||
459 | result = acpi_battery_get_status(battery, &bst); | |
460 | if (result || !bst) { | |
461 | seq_printf(seq, "ERROR: Unable to read battery status\n"); | |
462 | goto end; | |
463 | } | |
464 | ||
465 | if (!(bst->state & 0x04)) | |
466 | seq_printf(seq, "capacity state: ok\n"); | |
467 | else | |
468 | seq_printf(seq, "capacity state: critical\n"); | |
469 | ||
470 | if ((bst->state & 0x01) && (bst->state & 0x02)){ | |
471 | seq_printf(seq, "charging state: charging/discharging\n"); | |
472 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, | |
473 | "Battery Charging and Discharging?\n")); | |
474 | } | |
475 | else if (bst->state & 0x01) | |
476 | seq_printf(seq, "charging state: discharging\n"); | |
477 | else if (bst->state & 0x02) | |
478 | seq_printf(seq, "charging state: charging\n"); | |
479 | else { | |
480 | seq_printf(seq, "charging state: charged\n"); | |
481 | } | |
482 | ||
483 | if (bst->present_rate == ACPI_BATTERY_VALUE_UNKNOWN) | |
484 | seq_printf(seq, "present rate: unknown\n"); | |
485 | else | |
486 | seq_printf(seq, "present rate: %d %s\n", | |
487 | (u32) bst->present_rate, units); | |
488 | ||
489 | if (bst->remaining_capacity == ACPI_BATTERY_VALUE_UNKNOWN) | |
490 | seq_printf(seq, "remaining capacity: unknown\n"); | |
491 | else | |
492 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
493 | (u32) bst->remaining_capacity, units); | |
494 | ||
495 | if (bst->present_voltage == ACPI_BATTERY_VALUE_UNKNOWN) | |
496 | seq_printf(seq, "present voltage: unknown\n"); | |
497 | else | |
498 | seq_printf(seq, "present voltage: %d mV\n", | |
499 | (u32) bst->present_voltage); | |
500 | ||
501 | end: | |
502 | kfree(bst); | |
503 | ||
504 | return_VALUE(0); | |
505 | } | |
506 | ||
507 | static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) | |
508 | { | |
509 | return single_open(file, acpi_battery_read_state, PDE(inode)->data); | |
510 | } | |
511 | ||
512 | ||
513 | static int | |
514 | acpi_battery_read_alarm (struct seq_file *seq, void *offset) | |
515 | { | |
516 | struct acpi_battery *battery = (struct acpi_battery *) seq->private; | |
517 | char *units = "?"; | |
518 | ||
519 | ACPI_FUNCTION_TRACE("acpi_battery_read_alarm"); | |
520 | ||
521 | if (!battery) | |
522 | goto end; | |
523 | ||
524 | if (!battery->flags.present) { | |
525 | seq_printf(seq, "present: no\n"); | |
526 | goto end; | |
527 | } | |
528 | ||
529 | /* Battery Units */ | |
530 | ||
531 | units = battery->flags.power_unit ? ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS; | |
532 | ||
533 | /* Battery Alarm */ | |
534 | ||
535 | seq_printf(seq, "alarm: "); | |
536 | if (!battery->alarm) | |
537 | seq_printf(seq, "unsupported\n"); | |
538 | else | |
539 | seq_printf(seq, "%d %sh\n", (u32) battery->alarm, units); | |
540 | ||
541 | end: | |
542 | return_VALUE(0); | |
543 | } | |
544 | ||
545 | ||
546 | static ssize_t | |
547 | acpi_battery_write_alarm ( | |
548 | struct file *file, | |
549 | const char __user *buffer, | |
550 | size_t count, | |
551 | loff_t *ppos) | |
552 | { | |
553 | int result = 0; | |
554 | char alarm_string[12] = {'\0'}; | |
555 | struct seq_file *m = (struct seq_file *)file->private_data; | |
556 | struct acpi_battery *battery = (struct acpi_battery *)m->private; | |
557 | ||
558 | ACPI_FUNCTION_TRACE("acpi_battery_write_alarm"); | |
559 | ||
560 | if (!battery || (count > sizeof(alarm_string) - 1)) | |
561 | return_VALUE(-EINVAL); | |
562 | ||
563 | if (!battery->flags.present) | |
564 | return_VALUE(-ENODEV); | |
565 | ||
566 | if (copy_from_user(alarm_string, buffer, count)) | |
567 | return_VALUE(-EFAULT); | |
568 | ||
569 | alarm_string[count] = '\0'; | |
570 | ||
571 | result = acpi_battery_set_alarm(battery, | |
572 | simple_strtoul(alarm_string, NULL, 0)); | |
573 | if (result) | |
574 | return_VALUE(result); | |
575 | ||
576 | return_VALUE(count); | |
577 | } | |
578 | ||
579 | static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) | |
580 | { | |
581 | return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); | |
582 | } | |
583 | ||
584 | static struct file_operations acpi_battery_info_ops = { | |
585 | .open = acpi_battery_info_open_fs, | |
586 | .read = seq_read, | |
587 | .llseek = seq_lseek, | |
588 | .release = single_release, | |
589 | .owner = THIS_MODULE, | |
590 | }; | |
591 | ||
592 | static struct file_operations acpi_battery_state_ops = { | |
593 | .open = acpi_battery_state_open_fs, | |
594 | .read = seq_read, | |
595 | .llseek = seq_lseek, | |
596 | .release = single_release, | |
597 | .owner = THIS_MODULE, | |
598 | }; | |
599 | ||
600 | static struct file_operations acpi_battery_alarm_ops = { | |
601 | .open = acpi_battery_alarm_open_fs, | |
602 | .read = seq_read, | |
603 | .write = acpi_battery_write_alarm, | |
604 | .llseek = seq_lseek, | |
605 | .release = single_release, | |
606 | .owner = THIS_MODULE, | |
607 | }; | |
608 | ||
609 | static int | |
610 | acpi_battery_add_fs ( | |
611 | struct acpi_device *device) | |
612 | { | |
613 | struct proc_dir_entry *entry = NULL; | |
614 | ||
615 | ACPI_FUNCTION_TRACE("acpi_battery_add_fs"); | |
616 | ||
617 | if (!acpi_device_dir(device)) { | |
618 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
619 | acpi_battery_dir); | |
620 | if (!acpi_device_dir(device)) | |
621 | return_VALUE(-ENODEV); | |
622 | acpi_device_dir(device)->owner = THIS_MODULE; | |
623 | } | |
624 | ||
625 | /* 'info' [R] */ | |
626 | entry = create_proc_entry(ACPI_BATTERY_FILE_INFO, | |
627 | S_IRUGO, acpi_device_dir(device)); | |
628 | if (!entry) | |
629 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
630 | "Unable to create '%s' fs entry\n", | |
631 | ACPI_BATTERY_FILE_INFO)); | |
632 | else { | |
633 | entry->proc_fops = &acpi_battery_info_ops; | |
634 | entry->data = acpi_driver_data(device); | |
635 | entry->owner = THIS_MODULE; | |
636 | } | |
637 | ||
638 | /* 'status' [R] */ | |
639 | entry = create_proc_entry(ACPI_BATTERY_FILE_STATUS, | |
640 | S_IRUGO, acpi_device_dir(device)); | |
641 | if (!entry) | |
642 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
643 | "Unable to create '%s' fs entry\n", | |
644 | ACPI_BATTERY_FILE_STATUS)); | |
645 | else { | |
646 | entry->proc_fops = &acpi_battery_state_ops; | |
647 | entry->data = acpi_driver_data(device); | |
648 | entry->owner = THIS_MODULE; | |
649 | } | |
650 | ||
651 | /* 'alarm' [R/W] */ | |
652 | entry = create_proc_entry(ACPI_BATTERY_FILE_ALARM, | |
653 | S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device)); | |
654 | if (!entry) | |
655 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
656 | "Unable to create '%s' fs entry\n", | |
657 | ACPI_BATTERY_FILE_ALARM)); | |
658 | else { | |
659 | entry->proc_fops = &acpi_battery_alarm_ops; | |
660 | entry->data = acpi_driver_data(device); | |
661 | entry->owner = THIS_MODULE; | |
662 | } | |
663 | ||
664 | return_VALUE(0); | |
665 | } | |
666 | ||
667 | ||
668 | static int | |
669 | acpi_battery_remove_fs ( | |
670 | struct acpi_device *device) | |
671 | { | |
672 | ACPI_FUNCTION_TRACE("acpi_battery_remove_fs"); | |
673 | ||
674 | if (acpi_device_dir(device)) { | |
675 | remove_proc_entry(ACPI_BATTERY_FILE_ALARM, | |
676 | acpi_device_dir(device)); | |
677 | remove_proc_entry(ACPI_BATTERY_FILE_STATUS, | |
678 | acpi_device_dir(device)); | |
679 | remove_proc_entry(ACPI_BATTERY_FILE_INFO, | |
680 | acpi_device_dir(device)); | |
681 | ||
682 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); | |
683 | acpi_device_dir(device) = NULL; | |
684 | } | |
685 | ||
686 | return_VALUE(0); | |
687 | } | |
688 | ||
689 | ||
690 | /* -------------------------------------------------------------------------- | |
691 | Driver Interface | |
692 | -------------------------------------------------------------------------- */ | |
693 | ||
694 | static void | |
695 | acpi_battery_notify ( | |
696 | acpi_handle handle, | |
697 | u32 event, | |
698 | void *data) | |
699 | { | |
700 | struct acpi_battery *battery = (struct acpi_battery *) data; | |
701 | struct acpi_device *device = NULL; | |
702 | ||
703 | ACPI_FUNCTION_TRACE("acpi_battery_notify"); | |
704 | ||
705 | if (!battery) | |
706 | return_VOID; | |
707 | ||
708 | if (acpi_bus_get_device(handle, &device)) | |
709 | return_VOID; | |
710 | ||
711 | switch (event) { | |
712 | case ACPI_BATTERY_NOTIFY_STATUS: | |
713 | case ACPI_BATTERY_NOTIFY_INFO: | |
714 | acpi_battery_check(battery); | |
715 | acpi_bus_generate_event(device, event, battery->flags.present); | |
716 | break; | |
717 | default: | |
718 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
719 | "Unsupported event [0x%x]\n", event)); | |
720 | break; | |
721 | } | |
722 | ||
723 | return_VOID; | |
724 | } | |
725 | ||
726 | ||
727 | static int | |
728 | acpi_battery_add ( | |
729 | struct acpi_device *device) | |
730 | { | |
731 | int result = 0; | |
732 | acpi_status status = 0; | |
733 | struct acpi_battery *battery = NULL; | |
734 | ||
735 | ACPI_FUNCTION_TRACE("acpi_battery_add"); | |
736 | ||
737 | if (!device) | |
738 | return_VALUE(-EINVAL); | |
739 | ||
740 | battery = kmalloc(sizeof(struct acpi_battery), GFP_KERNEL); | |
741 | if (!battery) | |
742 | return_VALUE(-ENOMEM); | |
743 | memset(battery, 0, sizeof(struct acpi_battery)); | |
744 | ||
745 | battery->handle = device->handle; | |
746 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); | |
747 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
748 | acpi_driver_data(device) = battery; | |
749 | ||
750 | result = acpi_battery_check(battery); | |
751 | if (result) | |
752 | goto end; | |
753 | ||
754 | result = acpi_battery_add_fs(device); | |
755 | if (result) | |
756 | goto end; | |
757 | ||
758 | status = acpi_install_notify_handler(battery->handle, | |
759 | ACPI_DEVICE_NOTIFY, acpi_battery_notify, battery); | |
760 | if (ACPI_FAILURE(status)) { | |
761 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
762 | "Error installing notify handler\n")); | |
763 | result = -ENODEV; | |
764 | goto end; | |
765 | } | |
766 | ||
767 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", | |
768 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
769 | device->status.battery_present?"present":"absent"); | |
770 | ||
771 | end: | |
772 | if (result) { | |
773 | acpi_battery_remove_fs(device); | |
774 | kfree(battery); | |
775 | } | |
776 | ||
777 | return_VALUE(result); | |
778 | } | |
779 | ||
780 | ||
781 | static int | |
782 | acpi_battery_remove ( | |
783 | struct acpi_device *device, | |
784 | int type) | |
785 | { | |
786 | acpi_status status = 0; | |
787 | struct acpi_battery *battery = NULL; | |
788 | ||
789 | ACPI_FUNCTION_TRACE("acpi_battery_remove"); | |
790 | ||
791 | if (!device || !acpi_driver_data(device)) | |
792 | return_VALUE(-EINVAL); | |
793 | ||
794 | battery = (struct acpi_battery *) acpi_driver_data(device); | |
795 | ||
796 | status = acpi_remove_notify_handler(battery->handle, | |
797 | ACPI_DEVICE_NOTIFY, acpi_battery_notify); | |
798 | if (ACPI_FAILURE(status)) | |
799 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
800 | "Error removing notify handler\n")); | |
801 | ||
802 | acpi_battery_remove_fs(device); | |
803 | ||
804 | kfree(battery); | |
805 | ||
806 | return_VALUE(0); | |
807 | } | |
808 | ||
809 | ||
810 | static int __init | |
811 | acpi_battery_init (void) | |
812 | { | |
813 | int result = 0; | |
814 | ||
815 | ACPI_FUNCTION_TRACE("acpi_battery_init"); | |
816 | ||
817 | acpi_battery_dir = proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir); | |
818 | if (!acpi_battery_dir) | |
819 | return_VALUE(-ENODEV); | |
820 | acpi_battery_dir->owner = THIS_MODULE; | |
821 | ||
822 | result = acpi_bus_register_driver(&acpi_battery_driver); | |
823 | if (result < 0) { | |
824 | remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir); | |
825 | return_VALUE(-ENODEV); | |
826 | } | |
827 | ||
828 | return_VALUE(0); | |
829 | } | |
830 | ||
831 | ||
832 | static void __exit | |
833 | acpi_battery_exit (void) | |
834 | { | |
835 | ACPI_FUNCTION_TRACE("acpi_battery_exit"); | |
836 | ||
837 | acpi_bus_unregister_driver(&acpi_battery_driver); | |
838 | ||
839 | remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir); | |
840 | ||
841 | return_VOID; | |
842 | } | |
843 | ||
844 | ||
845 | module_init(acpi_battery_init); | |
846 | module_exit(acpi_battery_exit); |