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1 | /* | |
2 | * sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $) | |
3 | * | |
4 | * Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> | |
5 | * Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> | |
6 | * Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | */ | |
26 | ||
27 | #include <linux/init.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/moduleparam.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/proc_fs.h> | |
32 | #include <linux/seq_file.h> | |
33 | #include <asm/uaccess.h> | |
34 | #include <linux/acpi.h> | |
35 | #include <linux/timer.h> | |
36 | #include <linux/jiffies.h> | |
37 | #include <linux/delay.h> | |
38 | ||
39 | #include "sbshc.h" | |
40 | ||
41 | #define ACPI_SBS_COMPONENT 0x00080000 | |
42 | #define ACPI_SBS_CLASS "sbs" | |
43 | #define ACPI_AC_CLASS "ac_adapter" | |
44 | #define ACPI_BATTERY_CLASS "battery" | |
45 | #define ACPI_SBS_DEVICE_NAME "Smart Battery System" | |
46 | #define ACPI_SBS_FILE_INFO "info" | |
47 | #define ACPI_SBS_FILE_STATE "state" | |
48 | #define ACPI_SBS_FILE_ALARM "alarm" | |
49 | #define ACPI_BATTERY_DIR_NAME "BAT%i" | |
50 | #define ACPI_AC_DIR_NAME "AC0" | |
51 | ||
52 | enum acpi_sbs_device_addr { | |
53 | ACPI_SBS_CHARGER = 0x9, | |
54 | ACPI_SBS_MANAGER = 0xa, | |
55 | ACPI_SBS_BATTERY = 0xb, | |
56 | }; | |
57 | ||
58 | #define ACPI_SBS_NOTIFY_STATUS 0x80 | |
59 | #define ACPI_SBS_NOTIFY_INFO 0x81 | |
60 | ||
61 | ACPI_MODULE_NAME("sbs"); | |
62 | ||
63 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); | |
64 | MODULE_DESCRIPTION("Smart Battery System ACPI interface driver"); | |
65 | MODULE_LICENSE("GPL"); | |
66 | ||
67 | static unsigned int cache_time = 1000; | |
68 | module_param(cache_time, uint, 0644); | |
69 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
70 | ||
71 | extern struct proc_dir_entry *acpi_lock_ac_dir(void); | |
72 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); | |
73 | extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir); | |
74 | extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
75 | ||
76 | #define MAX_SBS_BAT 4 | |
77 | #define ACPI_SBS_BLOCK_MAX 32 | |
78 | ||
79 | static int acpi_sbs_add(struct acpi_device *device); | |
80 | static int acpi_sbs_remove(struct acpi_device *device, int type); | |
81 | static int acpi_sbs_resume(struct acpi_device *device); | |
82 | ||
83 | static const struct acpi_device_id sbs_device_ids[] = { | |
84 | {"ACPI0002", 0}, | |
85 | {"", 0}, | |
86 | }; | |
87 | MODULE_DEVICE_TABLE(acpi, sbs_device_ids); | |
88 | ||
89 | static struct acpi_driver acpi_sbs_driver = { | |
90 | .name = "sbs", | |
91 | .class = ACPI_SBS_CLASS, | |
92 | .ids = sbs_device_ids, | |
93 | .ops = { | |
94 | .add = acpi_sbs_add, | |
95 | .remove = acpi_sbs_remove, | |
96 | .resume = acpi_sbs_resume, | |
97 | }, | |
98 | }; | |
99 | ||
100 | struct acpi_battery { | |
101 | struct acpi_sbs *sbs; | |
102 | struct proc_dir_entry *proc_entry; | |
103 | unsigned long update_time; | |
104 | char name[8]; | |
105 | char manufacturer_name[ACPI_SBS_BLOCK_MAX]; | |
106 | char device_name[ACPI_SBS_BLOCK_MAX]; | |
107 | char device_chemistry[ACPI_SBS_BLOCK_MAX]; | |
108 | u32 alarm_capacity; | |
109 | u16 full_charge_capacity; | |
110 | u16 design_capacity; | |
111 | u16 design_voltage; | |
112 | u16 serial_number; | |
113 | u16 cycle_count; | |
114 | u16 temp_now; | |
115 | u16 voltage_now; | |
116 | s16 current_now; | |
117 | s16 current_avg; | |
118 | u16 capacity_now; | |
119 | u16 state_of_charge; | |
120 | u16 state; | |
121 | u16 mode; | |
122 | u16 spec; | |
123 | u8 id; | |
124 | u8 present:1; | |
125 | }; | |
126 | ||
127 | struct acpi_sbs { | |
128 | struct acpi_device *device; | |
129 | struct acpi_smb_hc *hc; | |
130 | struct mutex lock; | |
131 | struct proc_dir_entry *charger_entry; | |
132 | struct acpi_battery battery[MAX_SBS_BAT]; | |
133 | u8 batteries_supported:4; | |
134 | u8 manager_present:1; | |
135 | u8 charger_present:1; | |
136 | }; | |
137 | ||
138 | static inline int battery_scale(int log) | |
139 | { | |
140 | int scale = 1; | |
141 | while (log--) | |
142 | scale *= 10; | |
143 | return scale; | |
144 | } | |
145 | ||
146 | static inline int acpi_battery_vscale(struct acpi_battery *battery) | |
147 | { | |
148 | return battery_scale((battery->spec & 0x0f00) >> 8); | |
149 | } | |
150 | ||
151 | static inline int acpi_battery_ipscale(struct acpi_battery *battery) | |
152 | { | |
153 | return battery_scale((battery->spec & 0xf000) >> 12); | |
154 | } | |
155 | ||
156 | static inline int acpi_battery_mode(struct acpi_battery *battery) | |
157 | { | |
158 | return (battery->mode & 0x8000); | |
159 | } | |
160 | ||
161 | static inline int acpi_battery_scale(struct acpi_battery *battery) | |
162 | { | |
163 | return (acpi_battery_mode(battery) ? 10 : 1) * | |
164 | acpi_battery_ipscale(battery); | |
165 | } | |
166 | ||
167 | /* -------------------------------------------------------------------------- | |
168 | Smart Battery System Management | |
169 | -------------------------------------------------------------------------- */ | |
170 | ||
171 | struct acpi_battery_reader { | |
172 | u8 command; /* command for battery */ | |
173 | u8 mode; /* word or block? */ | |
174 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
175 | }; | |
176 | ||
177 | static struct acpi_battery_reader info_readers[] = { | |
178 | {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, | |
179 | {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, | |
180 | {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, | |
181 | {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, | |
182 | {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, | |
183 | {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, | |
184 | {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, | |
185 | {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, | |
186 | {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, | |
187 | {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, | |
188 | {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, | |
189 | }; | |
190 | ||
191 | static struct acpi_battery_reader state_readers[] = { | |
192 | {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, | |
193 | {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, | |
194 | {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_now)}, | |
195 | {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_avg)}, | |
196 | {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, | |
197 | {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, | |
198 | {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, | |
199 | }; | |
200 | ||
201 | static int acpi_manager_get_info(struct acpi_sbs *sbs) | |
202 | { | |
203 | int result = 0; | |
204 | u16 battery_system_info; | |
205 | ||
206 | result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, | |
207 | 0x04, (u8 *) & battery_system_info); | |
208 | if (!result) | |
209 | sbs->batteries_supported = battery_system_info & 0x000f; | |
210 | return result; | |
211 | } | |
212 | ||
213 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
214 | { | |
215 | int i, result = 0; | |
216 | ||
217 | for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { | |
218 | result = acpi_smbus_read(battery->sbs->hc, info_readers[i].mode, | |
219 | ACPI_SBS_BATTERY, info_readers[i].command, | |
220 | (u8 *) battery + info_readers[i].offset); | |
221 | if (result) | |
222 | break; | |
223 | } | |
224 | return result; | |
225 | } | |
226 | ||
227 | static int acpi_battery_get_state(struct acpi_battery *battery) | |
228 | { | |
229 | int i, result = 0; | |
230 | ||
231 | if (time_before(jiffies, battery->update_time + | |
232 | msecs_to_jiffies(cache_time))) | |
233 | return 0; | |
234 | for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { | |
235 | result = acpi_smbus_read(battery->sbs->hc, | |
236 | state_readers[i].mode, | |
237 | ACPI_SBS_BATTERY, | |
238 | state_readers[i].command, | |
239 | (u8 *)battery + | |
240 | state_readers[i].offset); | |
241 | if (result) | |
242 | goto end; | |
243 | } | |
244 | end: | |
245 | battery->update_time = jiffies; | |
246 | return result; | |
247 | } | |
248 | ||
249 | static int acpi_battery_get_alarm(struct acpi_battery *battery) | |
250 | { | |
251 | return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, | |
252 | ACPI_SBS_BATTERY, 0x01, | |
253 | (u8 *) & battery->alarm_capacity); | |
254 | } | |
255 | ||
256 | static int acpi_battery_set_alarm(struct acpi_battery *battery) | |
257 | { | |
258 | struct acpi_sbs *sbs = battery->sbs; | |
259 | u16 value; | |
260 | return 0; | |
261 | ||
262 | if (sbs->manager_present) { | |
263 | acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, | |
264 | 0x01, (u8 *)&value); | |
265 | value &= 0x0fff; | |
266 | value |= 1 << (battery->id + 12); | |
267 | acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_MANAGER, | |
268 | 0x01, (u8 *)&value, 2); | |
269 | } | |
270 | value = battery->alarm_capacity / (acpi_battery_mode(battery) ? 10 : 1); | |
271 | return acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY, | |
272 | 0x01, (u8 *)&value, 2); | |
273 | } | |
274 | ||
275 | static int acpi_ac_get_present(struct acpi_sbs *sbs) | |
276 | { | |
277 | int result; | |
278 | u16 status; | |
279 | ||
280 | result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER, | |
281 | 0x13, (u8 *) & status); | |
282 | if (!result) | |
283 | sbs->charger_present = (status >> 15) & 0x1; | |
284 | return result; | |
285 | } | |
286 | ||
287 | /* -------------------------------------------------------------------------- | |
288 | FS Interface (/proc/acpi) | |
289 | -------------------------------------------------------------------------- */ | |
290 | ||
291 | /* Generic Routines */ | |
292 | ||
293 | static int | |
294 | acpi_sbs_add_fs(struct proc_dir_entry **dir, | |
295 | struct proc_dir_entry *parent_dir, | |
296 | char *dir_name, | |
297 | struct file_operations *info_fops, | |
298 | struct file_operations *state_fops, | |
299 | struct file_operations *alarm_fops, void *data) | |
300 | { | |
301 | struct proc_dir_entry *entry = NULL; | |
302 | ||
303 | if (!*dir) { | |
304 | *dir = proc_mkdir(dir_name, parent_dir); | |
305 | if (!*dir) { | |
306 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, | |
307 | "proc_mkdir() failed")); | |
308 | return -ENODEV; | |
309 | } | |
310 | (*dir)->owner = THIS_MODULE; | |
311 | } | |
312 | ||
313 | /* 'info' [R] */ | |
314 | if (info_fops) { | |
315 | entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir); | |
316 | if (!entry) { | |
317 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, | |
318 | "create_proc_entry() failed")); | |
319 | } else { | |
320 | entry->proc_fops = info_fops; | |
321 | entry->data = data; | |
322 | entry->owner = THIS_MODULE; | |
323 | } | |
324 | } | |
325 | ||
326 | /* 'state' [R] */ | |
327 | if (state_fops) { | |
328 | entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir); | |
329 | if (!entry) { | |
330 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, | |
331 | "create_proc_entry() failed")); | |
332 | } else { | |
333 | entry->proc_fops = state_fops; | |
334 | entry->data = data; | |
335 | entry->owner = THIS_MODULE; | |
336 | } | |
337 | } | |
338 | ||
339 | /* 'alarm' [R/W] */ | |
340 | if (alarm_fops) { | |
341 | entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir); | |
342 | if (!entry) { | |
343 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, | |
344 | "create_proc_entry() failed")); | |
345 | } else { | |
346 | entry->proc_fops = alarm_fops; | |
347 | entry->data = data; | |
348 | entry->owner = THIS_MODULE; | |
349 | } | |
350 | } | |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
355 | static void | |
356 | acpi_sbs_remove_fs(struct proc_dir_entry **dir, | |
357 | struct proc_dir_entry *parent_dir) | |
358 | { | |
359 | ||
360 | if (*dir) { | |
361 | remove_proc_entry(ACPI_SBS_FILE_INFO, *dir); | |
362 | remove_proc_entry(ACPI_SBS_FILE_STATE, *dir); | |
363 | remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir); | |
364 | remove_proc_entry((*dir)->name, parent_dir); | |
365 | *dir = NULL; | |
366 | } | |
367 | ||
368 | } | |
369 | ||
370 | /* Smart Battery Interface */ | |
371 | ||
372 | static struct proc_dir_entry *acpi_battery_dir = NULL; | |
373 | ||
374 | static inline char *acpi_battery_units(struct acpi_battery *battery) | |
375 | { | |
376 | return acpi_battery_mode(battery) ? " mWh" : " mAh"; | |
377 | } | |
378 | ||
379 | ||
380 | static int acpi_battery_read_info(struct seq_file *seq, void *offset) | |
381 | { | |
382 | struct acpi_battery *battery = seq->private; | |
383 | struct acpi_sbs *sbs = battery->sbs; | |
384 | int result = 0; | |
385 | ||
386 | mutex_lock(&sbs->lock); | |
387 | ||
388 | seq_printf(seq, "present: %s\n", | |
389 | (battery->present) ? "yes" : "no"); | |
390 | if (!battery->present) | |
391 | goto end; | |
392 | ||
393 | seq_printf(seq, "design capacity: %i%s\n", | |
394 | battery->design_capacity * acpi_battery_scale(battery), | |
395 | acpi_battery_units(battery)); | |
396 | seq_printf(seq, "last full capacity: %i%s\n", | |
397 | battery->full_charge_capacity * acpi_battery_scale(battery), | |
398 | acpi_battery_units(battery)); | |
399 | seq_printf(seq, "battery technology: rechargeable\n"); | |
400 | seq_printf(seq, "design voltage: %i mV\n", | |
401 | battery->design_voltage * acpi_battery_vscale(battery)); | |
402 | seq_printf(seq, "design capacity warning: unknown\n"); | |
403 | seq_printf(seq, "design capacity low: unknown\n"); | |
404 | seq_printf(seq, "capacity granularity 1: unknown\n"); | |
405 | seq_printf(seq, "capacity granularity 2: unknown\n"); | |
406 | seq_printf(seq, "model number: %s\n", battery->device_name); | |
407 | seq_printf(seq, "serial number: %i\n", | |
408 | battery->serial_number); | |
409 | seq_printf(seq, "battery type: %s\n", | |
410 | battery->device_chemistry); | |
411 | seq_printf(seq, "OEM info: %s\n", | |
412 | battery->manufacturer_name); | |
413 | end: | |
414 | mutex_unlock(&sbs->lock); | |
415 | return result; | |
416 | } | |
417 | ||
418 | static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) | |
419 | { | |
420 | return single_open(file, acpi_battery_read_info, PDE(inode)->data); | |
421 | } | |
422 | ||
423 | static int acpi_battery_read_state(struct seq_file *seq, void *offset) | |
424 | { | |
425 | struct acpi_battery *battery = seq->private; | |
426 | struct acpi_sbs *sbs = battery->sbs; | |
427 | int result = 0; | |
428 | ||
429 | mutex_lock(&sbs->lock); | |
430 | seq_printf(seq, "present: %s\n", | |
431 | (battery->present) ? "yes" : "no"); | |
432 | if (!battery->present) | |
433 | goto end; | |
434 | ||
435 | acpi_battery_get_state(battery); | |
436 | seq_printf(seq, "capacity state: %s\n", | |
437 | (battery->state & 0x0010) ? "critical" : "ok"); | |
438 | seq_printf(seq, "charging state: %s\n", | |
439 | (battery->current_now < 0) ? "discharging" : | |
440 | ((battery->current_now > 0) ? "charging" : "charged")); | |
441 | seq_printf(seq, "present rate: %d mA\n", | |
442 | abs(battery->current_now) * acpi_battery_ipscale(battery)); | |
443 | seq_printf(seq, "remaining capacity: %i%s\n", | |
444 | battery->capacity_now * acpi_battery_scale(battery), | |
445 | acpi_battery_units(battery)); | |
446 | seq_printf(seq, "present voltage: %i mV\n", | |
447 | battery->voltage_now * acpi_battery_vscale(battery)); | |
448 | ||
449 | end: | |
450 | mutex_unlock(&sbs->lock); | |
451 | return result; | |
452 | } | |
453 | ||
454 | static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) | |
455 | { | |
456 | return single_open(file, acpi_battery_read_state, PDE(inode)->data); | |
457 | } | |
458 | ||
459 | static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) | |
460 | { | |
461 | struct acpi_battery *battery = seq->private; | |
462 | struct acpi_sbs *sbs = battery->sbs; | |
463 | int result = 0; | |
464 | ||
465 | mutex_lock(&sbs->lock); | |
466 | ||
467 | if (!battery->present) { | |
468 | seq_printf(seq, "present: no\n"); | |
469 | goto end; | |
470 | } | |
471 | ||
472 | acpi_battery_get_alarm(battery); | |
473 | seq_printf(seq, "alarm: "); | |
474 | if (battery->alarm_capacity) | |
475 | seq_printf(seq, "%i%s\n", | |
476 | battery->alarm_capacity * | |
477 | acpi_battery_scale(battery), | |
478 | acpi_battery_units(battery)); | |
479 | else | |
480 | seq_printf(seq, "disabled\n"); | |
481 | end: | |
482 | mutex_unlock(&sbs->lock); | |
483 | return result; | |
484 | } | |
485 | ||
486 | static ssize_t | |
487 | acpi_battery_write_alarm(struct file *file, const char __user * buffer, | |
488 | size_t count, loff_t * ppos) | |
489 | { | |
490 | struct seq_file *seq = file->private_data; | |
491 | struct acpi_battery *battery = seq->private; | |
492 | struct acpi_sbs *sbs = battery->sbs; | |
493 | char alarm_string[12] = { '\0' }; | |
494 | int result = 0; | |
495 | mutex_lock(&sbs->lock); | |
496 | if (!battery->present) { | |
497 | result = -ENODEV; | |
498 | goto end; | |
499 | } | |
500 | if (count > sizeof(alarm_string) - 1) { | |
501 | result = -EINVAL; | |
502 | goto end; | |
503 | } | |
504 | if (copy_from_user(alarm_string, buffer, count)) { | |
505 | result = -EFAULT; | |
506 | goto end; | |
507 | } | |
508 | alarm_string[count] = 0; | |
509 | battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0); | |
510 | acpi_battery_set_alarm(battery); | |
511 | end: | |
512 | mutex_unlock(&sbs->lock); | |
513 | if (result) | |
514 | return result; | |
515 | return count; | |
516 | } | |
517 | ||
518 | static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) | |
519 | { | |
520 | return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); | |
521 | } | |
522 | ||
523 | static struct file_operations acpi_battery_info_fops = { | |
524 | .open = acpi_battery_info_open_fs, | |
525 | .read = seq_read, | |
526 | .llseek = seq_lseek, | |
527 | .release = single_release, | |
528 | .owner = THIS_MODULE, | |
529 | }; | |
530 | ||
531 | static struct file_operations acpi_battery_state_fops = { | |
532 | .open = acpi_battery_state_open_fs, | |
533 | .read = seq_read, | |
534 | .llseek = seq_lseek, | |
535 | .release = single_release, | |
536 | .owner = THIS_MODULE, | |
537 | }; | |
538 | ||
539 | static struct file_operations acpi_battery_alarm_fops = { | |
540 | .open = acpi_battery_alarm_open_fs, | |
541 | .read = seq_read, | |
542 | .write = acpi_battery_write_alarm, | |
543 | .llseek = seq_lseek, | |
544 | .release = single_release, | |
545 | .owner = THIS_MODULE, | |
546 | }; | |
547 | ||
548 | /* Legacy AC Adapter Interface */ | |
549 | ||
550 | static struct proc_dir_entry *acpi_ac_dir = NULL; | |
551 | ||
552 | static int acpi_ac_read_state(struct seq_file *seq, void *offset) | |
553 | { | |
554 | ||
555 | struct acpi_sbs *sbs = seq->private; | |
556 | ||
557 | mutex_lock(&sbs->lock); | |
558 | ||
559 | seq_printf(seq, "state: %s\n", | |
560 | sbs->charger_present ? "on-line" : "off-line"); | |
561 | ||
562 | mutex_unlock(&sbs->lock); | |
563 | return 0; | |
564 | } | |
565 | ||
566 | static int acpi_ac_state_open_fs(struct inode *inode, struct file *file) | |
567 | { | |
568 | return single_open(file, acpi_ac_read_state, PDE(inode)->data); | |
569 | } | |
570 | ||
571 | static struct file_operations acpi_ac_state_fops = { | |
572 | .open = acpi_ac_state_open_fs, | |
573 | .read = seq_read, | |
574 | .llseek = seq_lseek, | |
575 | .release = single_release, | |
576 | .owner = THIS_MODULE, | |
577 | }; | |
578 | ||
579 | /* -------------------------------------------------------------------------- | |
580 | Driver Interface | |
581 | -------------------------------------------------------------------------- */ | |
582 | ||
583 | /* Smart Battery */ | |
584 | ||
585 | static int acpi_battery_read(struct acpi_battery *battery) | |
586 | { | |
587 | int result = 0, saved_present = battery->present; | |
588 | u16 state; | |
589 | ||
590 | if (battery->sbs->manager_present) { | |
591 | result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, | |
592 | ACPI_SBS_MANAGER, 0x01, (u8 *)&state); | |
593 | if (!result) | |
594 | battery->present = state & (1 << battery->id); | |
595 | state &= 0x0fff; | |
596 | state |= 1 << (battery->id + 12); | |
597 | acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, | |
598 | ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); | |
599 | } else if (battery->id == 0) | |
600 | battery->present = 1; | |
601 | if (result || !battery->present) | |
602 | return result; | |
603 | ||
604 | if (saved_present != battery->present) { | |
605 | battery->update_time = 0; | |
606 | result = acpi_battery_get_info(battery); | |
607 | if (result) | |
608 | return result; | |
609 | } | |
610 | result = acpi_battery_get_state(battery); | |
611 | return result; | |
612 | } | |
613 | ||
614 | static int acpi_battery_add(struct acpi_sbs *sbs, int id) | |
615 | { | |
616 | int result; | |
617 | struct acpi_battery *battery = &sbs->battery[id]; | |
618 | battery->id = id; | |
619 | battery->sbs = sbs; | |
620 | battery->update_time = 0; | |
621 | result = acpi_battery_read(battery); | |
622 | if (result) | |
623 | return result; | |
624 | ||
625 | sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); | |
626 | acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir, | |
627 | battery->name, &acpi_battery_info_fops, | |
628 | &acpi_battery_state_fops, &acpi_battery_alarm_fops, | |
629 | battery); | |
630 | printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", | |
631 | ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), | |
632 | battery->name, sbs->battery->present ? "present" : "absent"); | |
633 | return result; | |
634 | } | |
635 | ||
636 | static void acpi_battery_remove(struct acpi_sbs *sbs, int id) | |
637 | { | |
638 | ||
639 | if (sbs->battery[id].proc_entry) { | |
640 | acpi_sbs_remove_fs(&(sbs->battery[id].proc_entry), | |
641 | acpi_battery_dir); | |
642 | } | |
643 | } | |
644 | ||
645 | static int acpi_charger_add(struct acpi_sbs *sbs) | |
646 | { | |
647 | int result; | |
648 | ||
649 | result = acpi_ac_get_present(sbs); | |
650 | if (result) | |
651 | goto end; | |
652 | result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir, | |
653 | ACPI_AC_DIR_NAME, NULL, | |
654 | &acpi_ac_state_fops, NULL, sbs); | |
655 | if (result) | |
656 | goto end; | |
657 | printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n", | |
658 | ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), | |
659 | ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); | |
660 | end: | |
661 | return result; | |
662 | } | |
663 | ||
664 | static void acpi_charger_remove(struct acpi_sbs *sbs) | |
665 | { | |
666 | ||
667 | if (sbs->charger_entry) | |
668 | acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir); | |
669 | } | |
670 | ||
671 | void acpi_sbs_callback(void *context) | |
672 | { | |
673 | int id; | |
674 | struct acpi_sbs *sbs = context; | |
675 | struct acpi_battery *bat; | |
676 | u8 saved_charger_state = sbs->charger_present; | |
677 | u8 saved_battery_state; | |
678 | acpi_ac_get_present(sbs); | |
679 | if (sbs->charger_present != saved_charger_state) { | |
680 | acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME, | |
681 | ACPI_SBS_NOTIFY_STATUS, | |
682 | sbs->charger_present); | |
683 | } | |
684 | if (sbs->manager_present) { | |
685 | for (id = 0; id < MAX_SBS_BAT; ++id) { | |
686 | if (!(sbs->batteries_supported & (1 << id))) | |
687 | continue; | |
688 | bat = &sbs->battery[id]; | |
689 | saved_battery_state = bat->present; | |
690 | acpi_battery_read(bat); | |
691 | if (saved_battery_state == bat->present) | |
692 | continue; | |
693 | acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS, | |
694 | bat->name, | |
695 | ACPI_SBS_NOTIFY_STATUS, | |
696 | bat->present); | |
697 | } | |
698 | } | |
699 | } | |
700 | ||
701 | static int acpi_sbs_remove(struct acpi_device *device, int type); | |
702 | ||
703 | static int acpi_sbs_add(struct acpi_device *device) | |
704 | { | |
705 | struct acpi_sbs *sbs; | |
706 | int result = 0; | |
707 | int id; | |
708 | ||
709 | sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); | |
710 | if (!sbs) { | |
711 | result = -ENOMEM; | |
712 | goto end; | |
713 | } | |
714 | ||
715 | mutex_init(&sbs->lock); | |
716 | ||
717 | sbs->hc = acpi_driver_data(device->parent); | |
718 | sbs->device = device; | |
719 | strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); | |
720 | strcpy(acpi_device_class(device), ACPI_SBS_CLASS); | |
721 | acpi_driver_data(device) = sbs; | |
722 | ||
723 | result = acpi_charger_add(sbs); | |
724 | if (result) | |
725 | goto end; | |
726 | ||
727 | result = acpi_manager_get_info(sbs); | |
728 | if (!result) { | |
729 | sbs->manager_present = 1; | |
730 | for (id = 0; id < MAX_SBS_BAT; ++id) | |
731 | if ((sbs->batteries_supported & (1 << id))) | |
732 | acpi_battery_add(sbs, id); | |
733 | } else | |
734 | acpi_battery_add(sbs, 0); | |
735 | acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); | |
736 | end: | |
737 | if (result) | |
738 | acpi_sbs_remove(device, 0); | |
739 | return result; | |
740 | } | |
741 | ||
742 | static int acpi_sbs_remove(struct acpi_device *device, int type) | |
743 | { | |
744 | struct acpi_sbs *sbs; | |
745 | int id; | |
746 | ||
747 | if (!device) | |
748 | return -EINVAL; | |
749 | sbs = acpi_driver_data(device); | |
750 | if (!sbs) | |
751 | return -EINVAL; | |
752 | mutex_lock(&sbs->lock); | |
753 | acpi_smbus_unregister_callback(sbs->hc); | |
754 | for (id = 0; id < MAX_SBS_BAT; ++id) | |
755 | acpi_battery_remove(sbs, id); | |
756 | acpi_charger_remove(sbs); | |
757 | mutex_unlock(&sbs->lock); | |
758 | mutex_destroy(&sbs->lock); | |
759 | kfree(sbs); | |
760 | return 0; | |
761 | } | |
762 | ||
763 | static void acpi_sbs_rmdirs(void) | |
764 | { | |
765 | if (acpi_ac_dir) { | |
766 | acpi_unlock_ac_dir(acpi_ac_dir); | |
767 | acpi_ac_dir = NULL; | |
768 | } | |
769 | if (acpi_battery_dir) { | |
770 | acpi_unlock_battery_dir(acpi_battery_dir); | |
771 | acpi_battery_dir = NULL; | |
772 | } | |
773 | } | |
774 | ||
775 | static int acpi_sbs_resume(struct acpi_device *device) | |
776 | { | |
777 | struct acpi_sbs *sbs; | |
778 | if (!device) | |
779 | return -EINVAL; | |
780 | sbs = device->driver_data; | |
781 | acpi_sbs_callback(sbs); | |
782 | return 0; | |
783 | } | |
784 | ||
785 | static int __init acpi_sbs_init(void) | |
786 | { | |
787 | int result = 0; | |
788 | ||
789 | if (acpi_disabled) | |
790 | return -ENODEV; | |
791 | ||
792 | acpi_ac_dir = acpi_lock_ac_dir(); | |
793 | if (!acpi_ac_dir) { | |
794 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, | |
795 | "acpi_lock_ac_dir() failed")); | |
796 | return -ENODEV; | |
797 | } | |
798 | ||
799 | acpi_battery_dir = acpi_lock_battery_dir(); | |
800 | if (!acpi_battery_dir) { | |
801 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, | |
802 | "acpi_lock_battery_dir() failed")); | |
803 | acpi_sbs_rmdirs(); | |
804 | return -ENODEV; | |
805 | } | |
806 | ||
807 | result = acpi_bus_register_driver(&acpi_sbs_driver); | |
808 | if (result < 0) { | |
809 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, | |
810 | "acpi_bus_register_driver() failed")); | |
811 | acpi_sbs_rmdirs(); | |
812 | return -ENODEV; | |
813 | } | |
814 | ||
815 | return 0; | |
816 | } | |
817 | ||
818 | static void __exit acpi_sbs_exit(void) | |
819 | { | |
820 | acpi_bus_unregister_driver(&acpi_sbs_driver); | |
821 | ||
822 | acpi_sbs_rmdirs(); | |
823 | ||
824 | return; | |
825 | } | |
826 | ||
827 | module_init(acpi_sbs_init); | |
828 | module_exit(acpi_sbs_exit); |