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x86: fix bootup crash in native_read_tsc()
[wrt350n-kernel.git] / drivers / acpi / sbs.c
blobf136c7d3b3c234c0d5a5b4fabf19aa95df3733d1
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
32 #ifdef CONFIG_ACPI_PROCFS_POWER
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <asm/uaccess.h>
36 #endif
37
38 #include <linux/acpi.h>
39 #include <linux/timer.h>
40 #include <linux/jiffies.h>
41 #include <linux/delay.h>
42
43 #ifdef CONFIG_ACPI_SYSFS_POWER
44 #include <linux/power_supply.h>
45 #endif
46
47 #include "sbshc.h"
48
49 #define ACPI_SBS_CLASS "sbs"
50 #define ACPI_AC_CLASS "ac_adapter"
51 #define ACPI_BATTERY_CLASS "battery"
52 #define ACPI_SBS_DEVICE_NAME "Smart Battery System"
53 #define ACPI_SBS_FILE_INFO "info"
54 #define ACPI_SBS_FILE_STATE "state"
55 #define ACPI_SBS_FILE_ALARM "alarm"
56 #define ACPI_BATTERY_DIR_NAME "BAT%i"
57 #define ACPI_AC_DIR_NAME "AC0"
58
59 #define ACPI_SBS_NOTIFY_STATUS 0x80
60 #define ACPI_SBS_NOTIFY_INFO 0x81
61
62 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
63 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
64 MODULE_LICENSE("GPL");
65
66 static unsigned int cache_time = 1000;
67 module_param(cache_time, uint, 0644);
68 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
69
70 extern struct proc_dir_entry *acpi_lock_ac_dir(void);
71 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
72 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
73 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
74
75 #define MAX_SBS_BAT 4
76 #define ACPI_SBS_BLOCK_MAX 32
77
78 static const struct acpi_device_id sbs_device_ids[] = {
79 {"ACPI0002", 0},
80 {"", 0},
81 };
82 MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
83
84 struct acpi_battery {
85 #ifdef CONFIG_ACPI_SYSFS_POWER
86 struct power_supply bat;
87 #endif
88 struct acpi_sbs *sbs;
89 #ifdef CONFIG_ACPI_PROCFS_POWER
90 struct proc_dir_entry *proc_entry;
91 #endif
92 unsigned long update_time;
93 char name[8];
94 char manufacturer_name[ACPI_SBS_BLOCK_MAX];
95 char device_name[ACPI_SBS_BLOCK_MAX];
96 char device_chemistry[ACPI_SBS_BLOCK_MAX];
97 u16 alarm_capacity;
98 u16 full_charge_capacity;
99 u16 design_capacity;
100 u16 design_voltage;
101 u16 serial_number;
102 u16 cycle_count;
103 u16 temp_now;
104 u16 voltage_now;
105 s16 current_now;
106 s16 current_avg;
107 u16 capacity_now;
108 u16 state_of_charge;
109 u16 state;
110 u16 mode;
111 u16 spec;
112 u8 id;
113 u8 present:1;
114 u8 have_sysfs_alarm:1;
115 };
116
117 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
118
119 struct acpi_sbs {
120 #ifdef CONFIG_ACPI_SYSFS_POWER
121 struct power_supply charger;
122 #endif
123 struct acpi_device *device;
124 struct acpi_smb_hc *hc;
125 struct mutex lock;
126 #ifdef CONFIG_ACPI_PROCFS_POWER
127 struct proc_dir_entry *charger_entry;
128 #endif
129 struct acpi_battery battery[MAX_SBS_BAT];
130 u8 batteries_supported:4;
131 u8 manager_present:1;
132 u8 charger_present:1;
133 };
134
135 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
136
137 static inline int battery_scale(int log)
138 {
139 int scale = 1;
140 while (log--)
141 scale *= 10;
142 return scale;
143 }
144
145 static inline int acpi_battery_vscale(struct acpi_battery *battery)
146 {
147 return battery_scale((battery->spec & 0x0f00) >> 8);
148 }
149
150 static inline int acpi_battery_ipscale(struct acpi_battery *battery)
151 {
152 return battery_scale((battery->spec & 0xf000) >> 12);
153 }
154
155 static inline int acpi_battery_mode(struct acpi_battery *battery)
156 {
157 return (battery->mode & 0x8000);
158 }
159
160 static inline int acpi_battery_scale(struct acpi_battery *battery)
161 {
162 return (acpi_battery_mode(battery) ? 10 : 1) *
163 acpi_battery_ipscale(battery);
164 }
165
166 #ifdef CONFIG_ACPI_SYSFS_POWER
167 static int sbs_get_ac_property(struct power_supply *psy,
168 enum power_supply_property psp,
169 union power_supply_propval *val)
170 {
171 struct acpi_sbs *sbs = to_acpi_sbs(psy);
172 switch (psp) {
173 case POWER_SUPPLY_PROP_ONLINE:
174 val->intval = sbs->charger_present;
175 break;
176 default:
177 return -EINVAL;
178 }
179 return 0;
180 }
181
182 static int acpi_battery_technology(struct acpi_battery *battery)
183 {
184 if (!strcasecmp("NiCd", battery->device_chemistry))
185 return POWER_SUPPLY_TECHNOLOGY_NiCd;
186 if (!strcasecmp("NiMH", battery->device_chemistry))
187 return POWER_SUPPLY_TECHNOLOGY_NiMH;
188 if (!strcasecmp("LION", battery->device_chemistry))
189 return POWER_SUPPLY_TECHNOLOGY_LION;
190 if (!strcasecmp("LiP", battery->device_chemistry))
191 return POWER_SUPPLY_TECHNOLOGY_LIPO;
192 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
193 }
194
195 static int acpi_sbs_battery_get_property(struct power_supply *psy,
196 enum power_supply_property psp,
197 union power_supply_propval *val)
198 {
199 struct acpi_battery *battery = to_acpi_battery(psy);
200
201 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
202 return -ENODEV;
203 switch (psp) {
204 case POWER_SUPPLY_PROP_STATUS:
205 if (battery->current_now < 0)
206 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
207 else if (battery->current_now > 0)
208 val->intval = POWER_SUPPLY_STATUS_CHARGING;
209 else
210 val->intval = POWER_SUPPLY_STATUS_FULL;
211 break;
212 case POWER_SUPPLY_PROP_PRESENT:
213 val->intval = battery->present;
214 break;
215 case POWER_SUPPLY_PROP_TECHNOLOGY:
216 val->intval = acpi_battery_technology(battery);
217 break;
218 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
219 val->intval = battery->design_voltage *
220 acpi_battery_vscale(battery) * 1000;
221 break;
222 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
223 val->intval = battery->voltage_now *
224 acpi_battery_vscale(battery) * 1000;
225 break;
226 case POWER_SUPPLY_PROP_CURRENT_NOW:
227 val->intval = abs(battery->current_now) *
228 acpi_battery_ipscale(battery) * 1000;
229 break;
230 case POWER_SUPPLY_PROP_CURRENT_AVG:
231 val->intval = abs(battery->current_avg) *
232 acpi_battery_ipscale(battery) * 1000;
233 break;
234 case POWER_SUPPLY_PROP_CAPACITY:
235 val->intval = battery->state_of_charge;
236 break;
237 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
238 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
239 val->intval = battery->design_capacity *
240 acpi_battery_scale(battery) * 1000;
241 break;
242 case POWER_SUPPLY_PROP_CHARGE_FULL:
243 case POWER_SUPPLY_PROP_ENERGY_FULL:
244 val->intval = battery->full_charge_capacity *
245 acpi_battery_scale(battery) * 1000;
246 break;
247 case POWER_SUPPLY_PROP_CHARGE_NOW:
248 case POWER_SUPPLY_PROP_ENERGY_NOW:
249 val->intval = battery->capacity_now *
250 acpi_battery_scale(battery) * 1000;
251 break;
252 case POWER_SUPPLY_PROP_TEMP:
253 val->intval = battery->temp_now - 2730; // dK -> dC
254 break;
255 case POWER_SUPPLY_PROP_MODEL_NAME:
256 val->strval = battery->device_name;
257 break;
258 case POWER_SUPPLY_PROP_MANUFACTURER:
259 val->strval = battery->manufacturer_name;
260 break;
261 default:
262 return -EINVAL;
263 }
264 return 0;
265 }
266
267 static enum power_supply_property sbs_ac_props[] = {
268 POWER_SUPPLY_PROP_ONLINE,
269 };
270
271 static enum power_supply_property sbs_charge_battery_props[] = {
272 POWER_SUPPLY_PROP_STATUS,
273 POWER_SUPPLY_PROP_PRESENT,
274 POWER_SUPPLY_PROP_TECHNOLOGY,
275 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
276 POWER_SUPPLY_PROP_VOLTAGE_NOW,
277 POWER_SUPPLY_PROP_CURRENT_NOW,
278 POWER_SUPPLY_PROP_CURRENT_AVG,
279 POWER_SUPPLY_PROP_CAPACITY,
280 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
281 POWER_SUPPLY_PROP_CHARGE_FULL,
282 POWER_SUPPLY_PROP_CHARGE_NOW,
283 POWER_SUPPLY_PROP_TEMP,
284 POWER_SUPPLY_PROP_MODEL_NAME,
285 POWER_SUPPLY_PROP_MANUFACTURER,
286 };
287
288 static enum power_supply_property sbs_energy_battery_props[] = {
289 POWER_SUPPLY_PROP_STATUS,
290 POWER_SUPPLY_PROP_PRESENT,
291 POWER_SUPPLY_PROP_TECHNOLOGY,
292 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
293 POWER_SUPPLY_PROP_VOLTAGE_NOW,
294 POWER_SUPPLY_PROP_CURRENT_NOW,
295 POWER_SUPPLY_PROP_CURRENT_AVG,
296 POWER_SUPPLY_PROP_CAPACITY,
297 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
298 POWER_SUPPLY_PROP_ENERGY_FULL,
299 POWER_SUPPLY_PROP_ENERGY_NOW,
300 POWER_SUPPLY_PROP_TEMP,
301 POWER_SUPPLY_PROP_MODEL_NAME,
302 POWER_SUPPLY_PROP_MANUFACTURER,
303 };
304 #endif
305
306 /* --------------------------------------------------------------------------
307 Smart Battery System Management
308 -------------------------------------------------------------------------- */
309
310 struct acpi_battery_reader {
311 u8 command; /* command for battery */
312 u8 mode; /* word or block? */
313 size_t offset; /* offset inside struct acpi_sbs_battery */
314 };
315
316 static struct acpi_battery_reader info_readers[] = {
317 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
318 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
319 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
320 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
321 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
322 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
323 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
324 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
325 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
326 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
327 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
328 };
329
330 static struct acpi_battery_reader state_readers[] = {
331 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
332 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
333 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_now)},
334 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_avg)},
335 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
336 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
337 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
338 };
339
340 static int acpi_manager_get_info(struct acpi_sbs *sbs)
341 {
342 int result = 0;
343 u16 battery_system_info;
344
345 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
346 0x04, (u8 *)&battery_system_info);
347 if (!result)
348 sbs->batteries_supported = battery_system_info & 0x000f;
349 return result;
350 }
351
352 static int acpi_battery_get_info(struct acpi_battery *battery)
353 {
354 int i, result = 0;
355
356 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
357 result = acpi_smbus_read(battery->sbs->hc,
358 info_readers[i].mode,
359 ACPI_SBS_BATTERY,
360 info_readers[i].command,
361 (u8 *) battery +
362 info_readers[i].offset);
363 if (result)
364 break;
365 }
366 return result;
367 }
368
369 static int acpi_battery_get_state(struct acpi_battery *battery)
370 {
371 int i, result = 0;
372
373 if (battery->update_time &&
374 time_before(jiffies, battery->update_time +
375 msecs_to_jiffies(cache_time)))
376 return 0;
377 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
378 result = acpi_smbus_read(battery->sbs->hc,
379 state_readers[i].mode,
380 ACPI_SBS_BATTERY,
381 state_readers[i].command,
382 (u8 *)battery +
383 state_readers[i].offset);
384 if (result)
385 goto end;
386 }
387 end:
388 battery->update_time = jiffies;
389 return result;
390 }
391
392 static int acpi_battery_get_alarm(struct acpi_battery *battery)
393 {
394 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
395 ACPI_SBS_BATTERY, 0x01,
396 (u8 *)&battery->alarm_capacity);
397 }
398
399 static int acpi_battery_set_alarm(struct acpi_battery *battery)
400 {
401 struct acpi_sbs *sbs = battery->sbs;
402 u16 value, sel = 1 << (battery->id + 12);
403
404 int ret;
405
406
407 if (sbs->manager_present) {
408 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
409 0x01, (u8 *)&value);
410 if (ret)
411 goto end;
412 if ((value & 0xf000) != sel) {
413 value &= 0x0fff;
414 value |= sel;
415 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
416 ACPI_SBS_MANAGER,
417 0x01, (u8 *)&value, 2);
418 if (ret)
419 goto end;
420 }
421 }
422 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
423 0x01, (u8 *)&battery->alarm_capacity, 2);
424 end:
425 return ret;
426 }
427
428 static int acpi_ac_get_present(struct acpi_sbs *sbs)
429 {
430 int result;
431 u16 status;
432
433 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
434 0x13, (u8 *) & status);
435 if (!result)
436 sbs->charger_present = (status >> 15) & 0x1;
437 return result;
438 }
439
440 #ifdef CONFIG_ACPI_SYSFS_POWER
441 static ssize_t acpi_battery_alarm_show(struct device *dev,
442 struct device_attribute *attr,
443 char *buf)
444 {
445 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
446 acpi_battery_get_alarm(battery);
447 return sprintf(buf, "%d\n", battery->alarm_capacity *
448 acpi_battery_scale(battery) * 1000);
449 }
450
451 static ssize_t acpi_battery_alarm_store(struct device *dev,
452 struct device_attribute *attr,
453 const char *buf, size_t count)
454 {
455 unsigned long x;
456 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
457 if (sscanf(buf, "%ld\n", &x) == 1)
458 battery->alarm_capacity = x /
459 (1000 * acpi_battery_scale(battery));
460 if (battery->present)
461 acpi_battery_set_alarm(battery);
462 return count;
463 }
464
465 static struct device_attribute alarm_attr = {
466 .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE},
467 .show = acpi_battery_alarm_show,
468 .store = acpi_battery_alarm_store,
469 };
470 #endif
471
472 /* --------------------------------------------------------------------------
473 FS Interface (/proc/acpi)
474 -------------------------------------------------------------------------- */
475
476 #ifdef CONFIG_ACPI_PROCFS_POWER
477 /* Generic Routines */
478 static int
479 acpi_sbs_add_fs(struct proc_dir_entry **dir,
480 struct proc_dir_entry *parent_dir,
481 char *dir_name,
482 struct file_operations *info_fops,
483 struct file_operations *state_fops,
484 struct file_operations *alarm_fops, void *data)
485 {
486 struct proc_dir_entry *entry = NULL;
487
488 if (!*dir) {
489 *dir = proc_mkdir(dir_name, parent_dir);
490 if (!*dir) {
491 return -ENODEV;
492 }
493 (*dir)->owner = THIS_MODULE;
494 }
495
496 /* 'info' [R] */
497 if (info_fops) {
498 entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
499 if (entry) {
500 entry->proc_fops = info_fops;
501 entry->data = data;
502 entry->owner = THIS_MODULE;
503 }
504 }
505
506 /* 'state' [R] */
507 if (state_fops) {
508 entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
509 if (entry) {
510 entry->proc_fops = state_fops;
511 entry->data = data;
512 entry->owner = THIS_MODULE;
513 }
514 }
515
516 /* 'alarm' [R/W] */
517 if (alarm_fops) {
518 entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
519 if (entry) {
520 entry->proc_fops = alarm_fops;
521 entry->data = data;
522 entry->owner = THIS_MODULE;
523 }
524 }
525 return 0;
526 }
527
528 static void
529 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
530 struct proc_dir_entry *parent_dir)
531 {
532 if (*dir) {
533 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
534 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
535 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
536 remove_proc_entry((*dir)->name, parent_dir);
537 *dir = NULL;
538 }
539 }
540
541 /* Smart Battery Interface */
542 static struct proc_dir_entry *acpi_battery_dir = NULL;
543
544 static inline char *acpi_battery_units(struct acpi_battery *battery)
545 {
546 return acpi_battery_mode(battery) ? " mW" : " mA";
547 }
548
549
550 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
551 {
552 struct acpi_battery *battery = seq->private;
553 struct acpi_sbs *sbs = battery->sbs;
554 int result = 0;
555
556 mutex_lock(&sbs->lock);
557
558 seq_printf(seq, "present: %s\n",
559 (battery->present) ? "yes" : "no");
560 if (!battery->present)
561 goto end;
562
563 seq_printf(seq, "design capacity: %i%sh\n",
564 battery->design_capacity * acpi_battery_scale(battery),
565 acpi_battery_units(battery));
566 seq_printf(seq, "last full capacity: %i%sh\n",
567 battery->full_charge_capacity * acpi_battery_scale(battery),
568 acpi_battery_units(battery));
569 seq_printf(seq, "battery technology: rechargeable\n");
570 seq_printf(seq, "design voltage: %i mV\n",
571 battery->design_voltage * acpi_battery_vscale(battery));
572 seq_printf(seq, "design capacity warning: unknown\n");
573 seq_printf(seq, "design capacity low: unknown\n");
574 seq_printf(seq, "capacity granularity 1: unknown\n");
575 seq_printf(seq, "capacity granularity 2: unknown\n");
576 seq_printf(seq, "model number: %s\n", battery->device_name);
577 seq_printf(seq, "serial number: %i\n",
578 battery->serial_number);
579 seq_printf(seq, "battery type: %s\n",
580 battery->device_chemistry);
581 seq_printf(seq, "OEM info: %s\n",
582 battery->manufacturer_name);
583 end:
584 mutex_unlock(&sbs->lock);
585 return result;
586 }
587
588 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
589 {
590 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
591 }
592
593 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
594 {
595 struct acpi_battery *battery = seq->private;
596 struct acpi_sbs *sbs = battery->sbs;
597 int rate;
598
599 mutex_lock(&sbs->lock);
600 seq_printf(seq, "present: %s\n",
601 (battery->present) ? "yes" : "no");
602 if (!battery->present)
603 goto end;
604
605 acpi_battery_get_state(battery);
606 seq_printf(seq, "capacity state: %s\n",
607 (battery->state & 0x0010) ? "critical" : "ok");
608 seq_printf(seq, "charging state: %s\n",
609 (battery->current_now < 0) ? "discharging" :
610 ((battery->current_now > 0) ? "charging" : "charged"));
611 rate = abs(battery->current_now) * acpi_battery_ipscale(battery);
612 rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
613 acpi_battery_vscale(battery)/1000):1;
614 seq_printf(seq, "present rate: %d%s\n", rate,
615 acpi_battery_units(battery));
616 seq_printf(seq, "remaining capacity: %i%sh\n",
617 battery->capacity_now * acpi_battery_scale(battery),
618 acpi_battery_units(battery));
619 seq_printf(seq, "present voltage: %i mV\n",
620 battery->voltage_now * acpi_battery_vscale(battery));
621
622 end:
623 mutex_unlock(&sbs->lock);
624 return 0;
625 }
626
627 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
628 {
629 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
630 }
631
632 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
633 {
634 struct acpi_battery *battery = seq->private;
635 struct acpi_sbs *sbs = battery->sbs;
636 int result = 0;
637
638 mutex_lock(&sbs->lock);
639
640 if (!battery->present) {
641 seq_printf(seq, "present: no\n");
642 goto end;
643 }
644
645 acpi_battery_get_alarm(battery);
646 seq_printf(seq, "alarm: ");
647 if (battery->alarm_capacity)
648 seq_printf(seq, "%i%sh\n",
649 battery->alarm_capacity *
650 acpi_battery_scale(battery),
651 acpi_battery_units(battery));
652 else
653 seq_printf(seq, "disabled\n");
654 end:
655 mutex_unlock(&sbs->lock);
656 return result;
657 }
658
659 static ssize_t
660 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
661 size_t count, loff_t * ppos)
662 {
663 struct seq_file *seq = file->private_data;
664 struct acpi_battery *battery = seq->private;
665 struct acpi_sbs *sbs = battery->sbs;
666 char alarm_string[12] = { '\0' };
667 int result = 0;
668 mutex_lock(&sbs->lock);
669 if (!battery->present) {
670 result = -ENODEV;
671 goto end;
672 }
673 if (count > sizeof(alarm_string) - 1) {
674 result = -EINVAL;
675 goto end;
676 }
677 if (copy_from_user(alarm_string, buffer, count)) {
678 result = -EFAULT;
679 goto end;
680 }
681 alarm_string[count] = 0;
682 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
683 acpi_battery_scale(battery);
684 acpi_battery_set_alarm(battery);
685 end:
686 mutex_unlock(&sbs->lock);
687 if (result)
688 return result;
689 return count;
690 }
691
692 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
693 {
694 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
695 }
696
697 static struct file_operations acpi_battery_info_fops = {
698 .open = acpi_battery_info_open_fs,
699 .read = seq_read,
700 .llseek = seq_lseek,
701 .release = single_release,
702 .owner = THIS_MODULE,
703 };
704
705 static struct file_operations acpi_battery_state_fops = {
706 .open = acpi_battery_state_open_fs,
707 .read = seq_read,
708 .llseek = seq_lseek,
709 .release = single_release,
710 .owner = THIS_MODULE,
711 };
712
713 static struct file_operations acpi_battery_alarm_fops = {
714 .open = acpi_battery_alarm_open_fs,
715 .read = seq_read,
716 .write = acpi_battery_write_alarm,
717 .llseek = seq_lseek,
718 .release = single_release,
719 .owner = THIS_MODULE,
720 };
721
722 /* Legacy AC Adapter Interface */
723
724 static struct proc_dir_entry *acpi_ac_dir = NULL;
725
726 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
727 {
728
729 struct acpi_sbs *sbs = seq->private;
730
731 mutex_lock(&sbs->lock);
732
733 seq_printf(seq, "state: %s\n",
734 sbs->charger_present ? "on-line" : "off-line");
735
736 mutex_unlock(&sbs->lock);
737 return 0;
738 }
739
740 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
741 {
742 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
743 }
744
745 static struct file_operations acpi_ac_state_fops = {
746 .open = acpi_ac_state_open_fs,
747 .read = seq_read,
748 .llseek = seq_lseek,
749 .release = single_release,
750 .owner = THIS_MODULE,
751 };
752
753 #endif
754
755 /* --------------------------------------------------------------------------
756 Driver Interface
757 -------------------------------------------------------------------------- */
758 static int acpi_battery_read(struct acpi_battery *battery)
759 {
760 int result = 0, saved_present = battery->present;
761 u16 state;
762
763 if (battery->sbs->manager_present) {
764 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
765 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
766 if (!result)
767 battery->present = state & (1 << battery->id);
768 state &= 0x0fff;
769 state |= 1 << (battery->id + 12);
770 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
771 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
772 } else if (battery->id == 0)
773 battery->present = 1;
774 if (result || !battery->present)
775 return result;
776
777 if (saved_present != battery->present) {
778 battery->update_time = 0;
779 result = acpi_battery_get_info(battery);
780 if (result)
781 return result;
782 }
783 result = acpi_battery_get_state(battery);
784 return result;
785 }
786
787 /* Smart Battery */
788 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
789 {
790 struct acpi_battery *battery = &sbs->battery[id];
791 int result;
792
793 battery->id = id;
794 battery->sbs = sbs;
795 result = acpi_battery_read(battery);
796 if (result)
797 return result;
798
799 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
800 #ifdef CONFIG_ACPI_PROCFS_POWER
801 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
802 battery->name, &acpi_battery_info_fops,
803 &acpi_battery_state_fops, &acpi_battery_alarm_fops,
804 battery);
805 #endif
806 #ifdef CONFIG_ACPI_SYSFS_POWER
807 battery->bat.name = battery->name;
808 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
809 if (!acpi_battery_mode(battery)) {
810 battery->bat.properties = sbs_charge_battery_props;
811 battery->bat.num_properties =
812 ARRAY_SIZE(sbs_charge_battery_props);
813 } else {
814 battery->bat.properties = sbs_energy_battery_props;
815 battery->bat.num_properties =
816 ARRAY_SIZE(sbs_energy_battery_props);
817 }
818 battery->bat.get_property = acpi_sbs_battery_get_property;
819 result = power_supply_register(&sbs->device->dev, &battery->bat);
820 if (result)
821 goto end;
822 result = device_create_file(battery->bat.dev, &alarm_attr);
823 if (result)
824 goto end;
825 battery->have_sysfs_alarm = 1;
826 end:
827 #endif
828 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
829 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
830 battery->name, sbs->battery->present ? "present" : "absent");
831 return result;
832 }
833
834 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
835 {
836 struct acpi_battery *battery = &sbs->battery[id];
837 #ifdef CONFIG_ACPI_SYSFS_POWER
838 if (battery->bat.dev) {
839 if (battery->have_sysfs_alarm)
840 device_remove_file(battery->bat.dev, &alarm_attr);
841 power_supply_unregister(&battery->bat);
842 }
843 #endif
844 #ifdef CONFIG_ACPI_PROCFS_POWER
845 if (battery->proc_entry)
846 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
847 #endif
848 }
849
850 static int acpi_charger_add(struct acpi_sbs *sbs)
851 {
852 int result;
853
854 result = acpi_ac_get_present(sbs);
855 if (result)
856 goto end;
857 #ifdef CONFIG_ACPI_PROCFS_POWER
858 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
859 ACPI_AC_DIR_NAME, NULL,
860 &acpi_ac_state_fops, NULL, sbs);
861 if (result)
862 goto end;
863 #endif
864 #ifdef CONFIG_ACPI_SYSFS_POWER
865 sbs->charger.name = "sbs-charger";
866 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
867 sbs->charger.properties = sbs_ac_props;
868 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
869 sbs->charger.get_property = sbs_get_ac_property;
870 power_supply_register(&sbs->device->dev, &sbs->charger);
871 #endif
872 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
873 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
874 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
875 end:
876 return result;
877 }
878
879 static void acpi_charger_remove(struct acpi_sbs *sbs)
880 {
881 #ifdef CONFIG_ACPI_SYSFS_POWER
882 if (sbs->charger.dev)
883 power_supply_unregister(&sbs->charger);
884 #endif
885 #ifdef CONFIG_ACPI_PROCFS_POWER
886 if (sbs->charger_entry)
887 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
888 #endif
889 }
890
891 void acpi_sbs_callback(void *context)
892 {
893 int id;
894 struct acpi_sbs *sbs = context;
895 struct acpi_battery *bat;
896 u8 saved_charger_state = sbs->charger_present;
897 u8 saved_battery_state;
898 acpi_ac_get_present(sbs);
899 if (sbs->charger_present != saved_charger_state) {
900 #ifdef CONFIG_ACPI_PROC_EVENT
901 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
902 ACPI_SBS_NOTIFY_STATUS,
903 sbs->charger_present);
904 #endif
905 #ifdef CONFIG_ACPI_SYSFS_POWER
906 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
907 #endif
908 }
909 if (sbs->manager_present) {
910 for (id = 0; id < MAX_SBS_BAT; ++id) {
911 if (!(sbs->batteries_supported & (1 << id)))
912 continue;
913 bat = &sbs->battery[id];
914 saved_battery_state = bat->present;
915 acpi_battery_read(bat);
916 if (saved_battery_state == bat->present)
917 continue;
918 #ifdef CONFIG_ACPI_PROC_EVENT
919 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
920 bat->name,
921 ACPI_SBS_NOTIFY_STATUS,
922 bat->present);
923 #endif
924 #ifdef CONFIG_ACPI_SYSFS_POWER
925 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
926 #endif
927 }
928 }
929 }
930
931 static int acpi_sbs_remove(struct acpi_device *device, int type);
932
933 static int acpi_sbs_add(struct acpi_device *device)
934 {
935 struct acpi_sbs *sbs;
936 int result = 0;
937 int id;
938
939 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
940 if (!sbs) {
941 result = -ENOMEM;
942 goto end;
943 }
944
945 mutex_init(&sbs->lock);
946
947 sbs->hc = acpi_driver_data(device->parent);
948 sbs->device = device;
949 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
950 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
951 acpi_driver_data(device) = sbs;
952
953 result = acpi_charger_add(sbs);
954 if (result)
955 goto end;
956
957 result = acpi_manager_get_info(sbs);
958 if (!result) {
959 sbs->manager_present = 1;
960 for (id = 0; id < MAX_SBS_BAT; ++id)
961 if ((sbs->batteries_supported & (1 << id)))
962 acpi_battery_add(sbs, id);
963 } else
964 acpi_battery_add(sbs, 0);
965 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
966 end:
967 if (result)
968 acpi_sbs_remove(device, 0);
969 return result;
970 }
971
972 static int acpi_sbs_remove(struct acpi_device *device, int type)
973 {
974 struct acpi_sbs *sbs;
975 int id;
976
977 if (!device)
978 return -EINVAL;
979 sbs = acpi_driver_data(device);
980 if (!sbs)
981 return -EINVAL;
982 mutex_lock(&sbs->lock);
983 acpi_smbus_unregister_callback(sbs->hc);
984 for (id = 0; id < MAX_SBS_BAT; ++id)
985 acpi_battery_remove(sbs, id);
986 acpi_charger_remove(sbs);
987 mutex_unlock(&sbs->lock);
988 mutex_destroy(&sbs->lock);
989 kfree(sbs);
990 return 0;
991 }
992
993 static void acpi_sbs_rmdirs(void)
994 {
995 #ifdef CONFIG_ACPI_PROCFS_POWER
996 if (acpi_ac_dir) {
997 acpi_unlock_ac_dir(acpi_ac_dir);
998 acpi_ac_dir = NULL;
999 }
1000 if (acpi_battery_dir) {
1001 acpi_unlock_battery_dir(acpi_battery_dir);
1002 acpi_battery_dir = NULL;
1003 }
1004 #endif
1005 }
1006
1007 static int acpi_sbs_resume(struct acpi_device *device)
1008 {
1009 struct acpi_sbs *sbs;
1010 if (!device)
1011 return -EINVAL;
1012 sbs = device->driver_data;
1013 acpi_sbs_callback(sbs);
1014 return 0;
1015 }
1016
1017 static struct acpi_driver acpi_sbs_driver = {
1018 .name = "sbs",
1019 .class = ACPI_SBS_CLASS,
1020 .ids = sbs_device_ids,
1021 .ops = {
1022 .add = acpi_sbs_add,
1023 .remove = acpi_sbs_remove,
1024 .resume = acpi_sbs_resume,
1025 },
1026 };
1027
1028 static int __init acpi_sbs_init(void)
1029 {
1030 int result = 0;
1031
1032 if (acpi_disabled)
1033 return -ENODEV;
1034 #ifdef CONFIG_ACPI_PROCFS_POWER
1035 acpi_ac_dir = acpi_lock_ac_dir();
1036 if (!acpi_ac_dir)
1037 return -ENODEV;
1038 acpi_battery_dir = acpi_lock_battery_dir();
1039 if (!acpi_battery_dir) {
1040 acpi_sbs_rmdirs();
1041 return -ENODEV;
1042 }
1043 #endif
1044 result = acpi_bus_register_driver(&acpi_sbs_driver);
1045 if (result < 0) {
1046 acpi_sbs_rmdirs();
1047 return -ENODEV;
1048 }
1049 return 0;
1050 }
1051
1052 static void __exit acpi_sbs_exit(void)
1053 {
1054 acpi_bus_unregister_driver(&acpi_sbs_driver);
1055 acpi_sbs_rmdirs();
1056 return;
1057 }
1058
1059 module_init(acpi_sbs_init);
1060 module_exit(acpi_sbs_exit);
WRT350N Kernel Patches