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Merge branch 'acer' into release
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / sbs.c
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 rate_now;
106 s16 rate_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->rate_now < 0)
206 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
207 else if (battery->rate_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 case POWER_SUPPLY_PROP_POWER_NOW:
228 val->intval = abs(battery->rate_now) *
229 acpi_battery_ipscale(battery) * 1000;
230 break;
231 case POWER_SUPPLY_PROP_CURRENT_AVG:
232 case POWER_SUPPLY_PROP_POWER_AVG:
233 val->intval = abs(battery->rate_avg) *
234 acpi_battery_ipscale(battery) * 1000;
235 break;
236 case POWER_SUPPLY_PROP_CAPACITY:
237 val->intval = battery->state_of_charge;
238 break;
239 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
240 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
241 val->intval = battery->design_capacity *
242 acpi_battery_scale(battery) * 1000;
243 break;
244 case POWER_SUPPLY_PROP_CHARGE_FULL:
245 case POWER_SUPPLY_PROP_ENERGY_FULL:
246 val->intval = battery->full_charge_capacity *
247 acpi_battery_scale(battery) * 1000;
248 break;
249 case POWER_SUPPLY_PROP_CHARGE_NOW:
250 case POWER_SUPPLY_PROP_ENERGY_NOW:
251 val->intval = battery->capacity_now *
252 acpi_battery_scale(battery) * 1000;
253 break;
254 case POWER_SUPPLY_PROP_TEMP:
255 val->intval = battery->temp_now - 2730; // dK -> dC
256 break;
257 case POWER_SUPPLY_PROP_MODEL_NAME:
258 val->strval = battery->device_name;
259 break;
260 case POWER_SUPPLY_PROP_MANUFACTURER:
261 val->strval = battery->manufacturer_name;
262 break;
263 default:
264 return -EINVAL;
265 }
266 return 0;
267 }
268
269 static enum power_supply_property sbs_ac_props[] = {
270 POWER_SUPPLY_PROP_ONLINE,
271 };
272
273 static enum power_supply_property sbs_charge_battery_props[] = {
274 POWER_SUPPLY_PROP_STATUS,
275 POWER_SUPPLY_PROP_PRESENT,
276 POWER_SUPPLY_PROP_TECHNOLOGY,
277 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
278 POWER_SUPPLY_PROP_VOLTAGE_NOW,
279 POWER_SUPPLY_PROP_CURRENT_NOW,
280 POWER_SUPPLY_PROP_CURRENT_AVG,
281 POWER_SUPPLY_PROP_CAPACITY,
282 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
283 POWER_SUPPLY_PROP_CHARGE_FULL,
284 POWER_SUPPLY_PROP_CHARGE_NOW,
285 POWER_SUPPLY_PROP_TEMP,
286 POWER_SUPPLY_PROP_MODEL_NAME,
287 POWER_SUPPLY_PROP_MANUFACTURER,
288 };
289
290 static enum power_supply_property sbs_energy_battery_props[] = {
291 POWER_SUPPLY_PROP_STATUS,
292 POWER_SUPPLY_PROP_PRESENT,
293 POWER_SUPPLY_PROP_TECHNOLOGY,
294 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
295 POWER_SUPPLY_PROP_VOLTAGE_NOW,
296 POWER_SUPPLY_PROP_CURRENT_NOW,
297 POWER_SUPPLY_PROP_CURRENT_AVG,
298 POWER_SUPPLY_PROP_POWER_NOW,
299 POWER_SUPPLY_PROP_POWER_AVG,
300 POWER_SUPPLY_PROP_CAPACITY,
301 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
302 POWER_SUPPLY_PROP_ENERGY_FULL,
303 POWER_SUPPLY_PROP_ENERGY_NOW,
304 POWER_SUPPLY_PROP_TEMP,
305 POWER_SUPPLY_PROP_MODEL_NAME,
306 POWER_SUPPLY_PROP_MANUFACTURER,
307 };
308
309 #endif
310
311 /* --------------------------------------------------------------------------
312 Smart Battery System Management
313 -------------------------------------------------------------------------- */
314
315 struct acpi_battery_reader {
316 u8 command; /* command for battery */
317 u8 mode; /* word or block? */
318 size_t offset; /* offset inside struct acpi_sbs_battery */
319 };
320
321 static struct acpi_battery_reader info_readers[] = {
322 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
323 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
324 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
325 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
326 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
327 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
328 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
329 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
330 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
331 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
332 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
333 };
334
335 static struct acpi_battery_reader state_readers[] = {
336 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
337 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
338 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
339 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
340 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
341 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
342 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
343 };
344
345 static int acpi_manager_get_info(struct acpi_sbs *sbs)
346 {
347 int result = 0;
348 u16 battery_system_info;
349
350 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
351 0x04, (u8 *)&battery_system_info);
352 if (!result)
353 sbs->batteries_supported = battery_system_info & 0x000f;
354 return result;
355 }
356
357 static int acpi_battery_get_info(struct acpi_battery *battery)
358 {
359 int i, result = 0;
360
361 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
362 result = acpi_smbus_read(battery->sbs->hc,
363 info_readers[i].mode,
364 ACPI_SBS_BATTERY,
365 info_readers[i].command,
366 (u8 *) battery +
367 info_readers[i].offset);
368 if (result)
369 break;
370 }
371 return result;
372 }
373
374 static int acpi_battery_get_state(struct acpi_battery *battery)
375 {
376 int i, result = 0;
377
378 if (battery->update_time &&
379 time_before(jiffies, battery->update_time +
380 msecs_to_jiffies(cache_time)))
381 return 0;
382 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
383 result = acpi_smbus_read(battery->sbs->hc,
384 state_readers[i].mode,
385 ACPI_SBS_BATTERY,
386 state_readers[i].command,
387 (u8 *)battery +
388 state_readers[i].offset);
389 if (result)
390 goto end;
391 }
392 end:
393 battery->update_time = jiffies;
394 return result;
395 }
396
397 static int acpi_battery_get_alarm(struct acpi_battery *battery)
398 {
399 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
400 ACPI_SBS_BATTERY, 0x01,
401 (u8 *)&battery->alarm_capacity);
402 }
403
404 static int acpi_battery_set_alarm(struct acpi_battery *battery)
405 {
406 struct acpi_sbs *sbs = battery->sbs;
407 u16 value, sel = 1 << (battery->id + 12);
408
409 int ret;
410
411
412 if (sbs->manager_present) {
413 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
414 0x01, (u8 *)&value);
415 if (ret)
416 goto end;
417 if ((value & 0xf000) != sel) {
418 value &= 0x0fff;
419 value |= sel;
420 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
421 ACPI_SBS_MANAGER,
422 0x01, (u8 *)&value, 2);
423 if (ret)
424 goto end;
425 }
426 }
427 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
428 0x01, (u8 *)&battery->alarm_capacity, 2);
429 end:
430 return ret;
431 }
432
433 static int acpi_ac_get_present(struct acpi_sbs *sbs)
434 {
435 int result;
436 u16 status;
437
438 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
439 0x13, (u8 *) & status);
440 if (!result)
441 sbs->charger_present = (status >> 15) & 0x1;
442 return result;
443 }
444
445 #ifdef CONFIG_ACPI_SYSFS_POWER
446 static ssize_t acpi_battery_alarm_show(struct device *dev,
447 struct device_attribute *attr,
448 char *buf)
449 {
450 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
451 acpi_battery_get_alarm(battery);
452 return sprintf(buf, "%d\n", battery->alarm_capacity *
453 acpi_battery_scale(battery) * 1000);
454 }
455
456 static ssize_t acpi_battery_alarm_store(struct device *dev,
457 struct device_attribute *attr,
458 const char *buf, size_t count)
459 {
460 unsigned long x;
461 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
462 if (sscanf(buf, "%ld\n", &x) == 1)
463 battery->alarm_capacity = x /
464 (1000 * acpi_battery_scale(battery));
465 if (battery->present)
466 acpi_battery_set_alarm(battery);
467 return count;
468 }
469
470 static struct device_attribute alarm_attr = {
471 .attr = {.name = "alarm", .mode = 0644},
472 .show = acpi_battery_alarm_show,
473 .store = acpi_battery_alarm_store,
474 };
475 #endif
476
477 /* --------------------------------------------------------------------------
478 FS Interface (/proc/acpi)
479 -------------------------------------------------------------------------- */
480
481 #ifdef CONFIG_ACPI_PROCFS_POWER
482 /* Generic Routines */
483 static int
484 acpi_sbs_add_fs(struct proc_dir_entry **dir,
485 struct proc_dir_entry *parent_dir,
486 char *dir_name,
487 struct file_operations *info_fops,
488 struct file_operations *state_fops,
489 struct file_operations *alarm_fops, void *data)
490 {
491 if (!*dir) {
492 *dir = proc_mkdir(dir_name, parent_dir);
493 if (!*dir) {
494 return -ENODEV;
495 }
496 (*dir)->owner = THIS_MODULE;
497 }
498
499 /* 'info' [R] */
500 if (info_fops)
501 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
502 info_fops, data);
503
504 /* 'state' [R] */
505 if (state_fops)
506 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
507 state_fops, data);
508
509 /* 'alarm' [R/W] */
510 if (alarm_fops)
511 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
512 alarm_fops, data);
513 return 0;
514 }
515
516 static void
517 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
518 struct proc_dir_entry *parent_dir)
519 {
520 if (*dir) {
521 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
522 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
523 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
524 remove_proc_entry((*dir)->name, parent_dir);
525 *dir = NULL;
526 }
527 }
528
529 /* Smart Battery Interface */
530 static struct proc_dir_entry *acpi_battery_dir = NULL;
531
532 static inline char *acpi_battery_units(struct acpi_battery *battery)
533 {
534 return acpi_battery_mode(battery) ? " mW" : " mA";
535 }
536
537
538 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
539 {
540 struct acpi_battery *battery = seq->private;
541 struct acpi_sbs *sbs = battery->sbs;
542 int result = 0;
543
544 mutex_lock(&sbs->lock);
545
546 seq_printf(seq, "present: %s\n",
547 (battery->present) ? "yes" : "no");
548 if (!battery->present)
549 goto end;
550
551 seq_printf(seq, "design capacity: %i%sh\n",
552 battery->design_capacity * acpi_battery_scale(battery),
553 acpi_battery_units(battery));
554 seq_printf(seq, "last full capacity: %i%sh\n",
555 battery->full_charge_capacity * acpi_battery_scale(battery),
556 acpi_battery_units(battery));
557 seq_printf(seq, "battery technology: rechargeable\n");
558 seq_printf(seq, "design voltage: %i mV\n",
559 battery->design_voltage * acpi_battery_vscale(battery));
560 seq_printf(seq, "design capacity warning: unknown\n");
561 seq_printf(seq, "design capacity low: unknown\n");
562 seq_printf(seq, "capacity granularity 1: unknown\n");
563 seq_printf(seq, "capacity granularity 2: unknown\n");
564 seq_printf(seq, "model number: %s\n", battery->device_name);
565 seq_printf(seq, "serial number: %i\n",
566 battery->serial_number);
567 seq_printf(seq, "battery type: %s\n",
568 battery->device_chemistry);
569 seq_printf(seq, "OEM info: %s\n",
570 battery->manufacturer_name);
571 end:
572 mutex_unlock(&sbs->lock);
573 return result;
574 }
575
576 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
577 {
578 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
579 }
580
581 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
582 {
583 struct acpi_battery *battery = seq->private;
584 struct acpi_sbs *sbs = battery->sbs;
585 int rate;
586
587 mutex_lock(&sbs->lock);
588 seq_printf(seq, "present: %s\n",
589 (battery->present) ? "yes" : "no");
590 if (!battery->present)
591 goto end;
592
593 acpi_battery_get_state(battery);
594 seq_printf(seq, "capacity state: %s\n",
595 (battery->state & 0x0010) ? "critical" : "ok");
596 seq_printf(seq, "charging state: %s\n",
597 (battery->rate_now < 0) ? "discharging" :
598 ((battery->rate_now > 0) ? "charging" : "charged"));
599 rate = abs(battery->rate_now) * acpi_battery_ipscale(battery);
600 rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
601 acpi_battery_vscale(battery)/1000):1;
602 seq_printf(seq, "present rate: %d%s\n", rate,
603 acpi_battery_units(battery));
604 seq_printf(seq, "remaining capacity: %i%sh\n",
605 battery->capacity_now * acpi_battery_scale(battery),
606 acpi_battery_units(battery));
607 seq_printf(seq, "present voltage: %i mV\n",
608 battery->voltage_now * acpi_battery_vscale(battery));
609
610 end:
611 mutex_unlock(&sbs->lock);
612 return 0;
613 }
614
615 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
616 {
617 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
618 }
619
620 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
621 {
622 struct acpi_battery *battery = seq->private;
623 struct acpi_sbs *sbs = battery->sbs;
624 int result = 0;
625
626 mutex_lock(&sbs->lock);
627
628 if (!battery->present) {
629 seq_printf(seq, "present: no\n");
630 goto end;
631 }
632
633 acpi_battery_get_alarm(battery);
634 seq_printf(seq, "alarm: ");
635 if (battery->alarm_capacity)
636 seq_printf(seq, "%i%sh\n",
637 battery->alarm_capacity *
638 acpi_battery_scale(battery),
639 acpi_battery_units(battery));
640 else
641 seq_printf(seq, "disabled\n");
642 end:
643 mutex_unlock(&sbs->lock);
644 return result;
645 }
646
647 static ssize_t
648 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
649 size_t count, loff_t * ppos)
650 {
651 struct seq_file *seq = file->private_data;
652 struct acpi_battery *battery = seq->private;
653 struct acpi_sbs *sbs = battery->sbs;
654 char alarm_string[12] = { '\0' };
655 int result = 0;
656 mutex_lock(&sbs->lock);
657 if (!battery->present) {
658 result = -ENODEV;
659 goto end;
660 }
661 if (count > sizeof(alarm_string) - 1) {
662 result = -EINVAL;
663 goto end;
664 }
665 if (copy_from_user(alarm_string, buffer, count)) {
666 result = -EFAULT;
667 goto end;
668 }
669 alarm_string[count] = 0;
670 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
671 acpi_battery_scale(battery);
672 acpi_battery_set_alarm(battery);
673 end:
674 mutex_unlock(&sbs->lock);
675 if (result)
676 return result;
677 return count;
678 }
679
680 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
681 {
682 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
683 }
684
685 static struct file_operations acpi_battery_info_fops = {
686 .open = acpi_battery_info_open_fs,
687 .read = seq_read,
688 .llseek = seq_lseek,
689 .release = single_release,
690 .owner = THIS_MODULE,
691 };
692
693 static struct file_operations acpi_battery_state_fops = {
694 .open = acpi_battery_state_open_fs,
695 .read = seq_read,
696 .llseek = seq_lseek,
697 .release = single_release,
698 .owner = THIS_MODULE,
699 };
700
701 static struct file_operations acpi_battery_alarm_fops = {
702 .open = acpi_battery_alarm_open_fs,
703 .read = seq_read,
704 .write = acpi_battery_write_alarm,
705 .llseek = seq_lseek,
706 .release = single_release,
707 .owner = THIS_MODULE,
708 };
709
710 /* Legacy AC Adapter Interface */
711
712 static struct proc_dir_entry *acpi_ac_dir = NULL;
713
714 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
715 {
716
717 struct acpi_sbs *sbs = seq->private;
718
719 mutex_lock(&sbs->lock);
720
721 seq_printf(seq, "state: %s\n",
722 sbs->charger_present ? "on-line" : "off-line");
723
724 mutex_unlock(&sbs->lock);
725 return 0;
726 }
727
728 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
729 {
730 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
731 }
732
733 static struct file_operations acpi_ac_state_fops = {
734 .open = acpi_ac_state_open_fs,
735 .read = seq_read,
736 .llseek = seq_lseek,
737 .release = single_release,
738 .owner = THIS_MODULE,
739 };
740
741 #endif
742
743 /* --------------------------------------------------------------------------
744 Driver Interface
745 -------------------------------------------------------------------------- */
746 static int acpi_battery_read(struct acpi_battery *battery)
747 {
748 int result = 0, saved_present = battery->present;
749 u16 state;
750
751 if (battery->sbs->manager_present) {
752 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
753 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
754 if (!result)
755 battery->present = state & (1 << battery->id);
756 state &= 0x0fff;
757 state |= 1 << (battery->id + 12);
758 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
759 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
760 } else if (battery->id == 0)
761 battery->present = 1;
762 if (result || !battery->present)
763 return result;
764
765 if (saved_present != battery->present) {
766 battery->update_time = 0;
767 result = acpi_battery_get_info(battery);
768 if (result)
769 return result;
770 }
771 result = acpi_battery_get_state(battery);
772 return result;
773 }
774
775 /* Smart Battery */
776 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
777 {
778 struct acpi_battery *battery = &sbs->battery[id];
779 int result;
780
781 battery->id = id;
782 battery->sbs = sbs;
783 result = acpi_battery_read(battery);
784 if (result)
785 return result;
786
787 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
788 #ifdef CONFIG_ACPI_PROCFS_POWER
789 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
790 battery->name, &acpi_battery_info_fops,
791 &acpi_battery_state_fops, &acpi_battery_alarm_fops,
792 battery);
793 #endif
794 #ifdef CONFIG_ACPI_SYSFS_POWER
795 battery->bat.name = battery->name;
796 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
797 if (!acpi_battery_mode(battery)) {
798 battery->bat.properties = sbs_charge_battery_props;
799 battery->bat.num_properties =
800 ARRAY_SIZE(sbs_charge_battery_props);
801 } else {
802 battery->bat.properties = sbs_energy_battery_props;
803 battery->bat.num_properties =
804 ARRAY_SIZE(sbs_energy_battery_props);
805 }
806 battery->bat.get_property = acpi_sbs_battery_get_property;
807 result = power_supply_register(&sbs->device->dev, &battery->bat);
808 if (result)
809 goto end;
810 result = device_create_file(battery->bat.dev, &alarm_attr);
811 if (result)
812 goto end;
813 battery->have_sysfs_alarm = 1;
814 end:
815 #endif
816 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
817 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
818 battery->name, battery->present ? "present" : "absent");
819 return result;
820 }
821
822 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
823 {
824 struct acpi_battery *battery = &sbs->battery[id];
825 #ifdef CONFIG_ACPI_SYSFS_POWER
826 if (battery->bat.dev) {
827 if (battery->have_sysfs_alarm)
828 device_remove_file(battery->bat.dev, &alarm_attr);
829 power_supply_unregister(&battery->bat);
830 }
831 #endif
832 #ifdef CONFIG_ACPI_PROCFS_POWER
833 if (battery->proc_entry)
834 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
835 #endif
836 }
837
838 static int acpi_charger_add(struct acpi_sbs *sbs)
839 {
840 int result;
841
842 result = acpi_ac_get_present(sbs);
843 if (result)
844 goto end;
845 #ifdef CONFIG_ACPI_PROCFS_POWER
846 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
847 ACPI_AC_DIR_NAME, NULL,
848 &acpi_ac_state_fops, NULL, sbs);
849 if (result)
850 goto end;
851 #endif
852 #ifdef CONFIG_ACPI_SYSFS_POWER
853 sbs->charger.name = "sbs-charger";
854 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
855 sbs->charger.properties = sbs_ac_props;
856 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
857 sbs->charger.get_property = sbs_get_ac_property;
858 power_supply_register(&sbs->device->dev, &sbs->charger);
859 #endif
860 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
861 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
862 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
863 end:
864 return result;
865 }
866
867 static void acpi_charger_remove(struct acpi_sbs *sbs)
868 {
869 #ifdef CONFIG_ACPI_SYSFS_POWER
870 if (sbs->charger.dev)
871 power_supply_unregister(&sbs->charger);
872 #endif
873 #ifdef CONFIG_ACPI_PROCFS_POWER
874 if (sbs->charger_entry)
875 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
876 #endif
877 }
878
879 static void acpi_sbs_callback(void *context)
880 {
881 int id;
882 struct acpi_sbs *sbs = context;
883 struct acpi_battery *bat;
884 u8 saved_charger_state = sbs->charger_present;
885 u8 saved_battery_state;
886 acpi_ac_get_present(sbs);
887 if (sbs->charger_present != saved_charger_state) {
888 #ifdef CONFIG_ACPI_PROC_EVENT
889 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
890 ACPI_SBS_NOTIFY_STATUS,
891 sbs->charger_present);
892 #endif
893 #ifdef CONFIG_ACPI_SYSFS_POWER
894 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
895 #endif
896 }
897 if (sbs->manager_present) {
898 for (id = 0; id < MAX_SBS_BAT; ++id) {
899 if (!(sbs->batteries_supported & (1 << id)))
900 continue;
901 bat = &sbs->battery[id];
902 saved_battery_state = bat->present;
903 acpi_battery_read(bat);
904 if (saved_battery_state == bat->present)
905 continue;
906 #ifdef CONFIG_ACPI_PROC_EVENT
907 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
908 bat->name,
909 ACPI_SBS_NOTIFY_STATUS,
910 bat->present);
911 #endif
912 #ifdef CONFIG_ACPI_SYSFS_POWER
913 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
914 #endif
915 }
916 }
917 }
918
919 static int acpi_sbs_remove(struct acpi_device *device, int type);
920
921 static int acpi_sbs_add(struct acpi_device *device)
922 {
923 struct acpi_sbs *sbs;
924 int result = 0;
925 int id;
926
927 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
928 if (!sbs) {
929 result = -ENOMEM;
930 goto end;
931 }
932
933 mutex_init(&sbs->lock);
934
935 sbs->hc = acpi_driver_data(device->parent);
936 sbs->device = device;
937 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
938 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
939 device->driver_data = sbs;
940
941 result = acpi_charger_add(sbs);
942 if (result)
943 goto end;
944
945 result = acpi_manager_get_info(sbs);
946 if (!result) {
947 sbs->manager_present = 1;
948 for (id = 0; id < MAX_SBS_BAT; ++id)
949 if ((sbs->batteries_supported & (1 << id)))
950 acpi_battery_add(sbs, id);
951 } else
952 acpi_battery_add(sbs, 0);
953 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
954 end:
955 if (result)
956 acpi_sbs_remove(device, 0);
957 return result;
958 }
959
960 static int acpi_sbs_remove(struct acpi_device *device, int type)
961 {
962 struct acpi_sbs *sbs;
963 int id;
964
965 if (!device)
966 return -EINVAL;
967 sbs = acpi_driver_data(device);
968 if (!sbs)
969 return -EINVAL;
970 mutex_lock(&sbs->lock);
971 acpi_smbus_unregister_callback(sbs->hc);
972 for (id = 0; id < MAX_SBS_BAT; ++id)
973 acpi_battery_remove(sbs, id);
974 acpi_charger_remove(sbs);
975 mutex_unlock(&sbs->lock);
976 mutex_destroy(&sbs->lock);
977 kfree(sbs);
978 return 0;
979 }
980
981 static void acpi_sbs_rmdirs(void)
982 {
983 #ifdef CONFIG_ACPI_PROCFS_POWER
984 if (acpi_ac_dir) {
985 acpi_unlock_ac_dir(acpi_ac_dir);
986 acpi_ac_dir = NULL;
987 }
988 if (acpi_battery_dir) {
989 acpi_unlock_battery_dir(acpi_battery_dir);
990 acpi_battery_dir = NULL;
991 }
992 #endif
993 }
994
995 static int acpi_sbs_resume(struct acpi_device *device)
996 {
997 struct acpi_sbs *sbs;
998 if (!device)
999 return -EINVAL;
1000 sbs = device->driver_data;
1001 acpi_sbs_callback(sbs);
1002 return 0;
1003 }
1004
1005 static struct acpi_driver acpi_sbs_driver = {
1006 .name = "sbs",
1007 .class = ACPI_SBS_CLASS,
1008 .ids = sbs_device_ids,
1009 .ops = {
1010 .add = acpi_sbs_add,
1011 .remove = acpi_sbs_remove,
1012 .resume = acpi_sbs_resume,
1013 },
1014 };
1015
1016 static int __init acpi_sbs_init(void)
1017 {
1018 int result = 0;
1019
1020 if (acpi_disabled)
1021 return -ENODEV;
1022 #ifdef CONFIG_ACPI_PROCFS_POWER
1023 acpi_ac_dir = acpi_lock_ac_dir();
1024 if (!acpi_ac_dir)
1025 return -ENODEV;
1026 acpi_battery_dir = acpi_lock_battery_dir();
1027 if (!acpi_battery_dir) {
1028 acpi_sbs_rmdirs();
1029 return -ENODEV;
1030 }
1031 #endif
1032 result = acpi_bus_register_driver(&acpi_sbs_driver);
1033 if (result < 0) {
1034 acpi_sbs_rmdirs();
1035 return -ENODEV;
1036 }
1037 return 0;
1038 }
1039
1040 static void __exit acpi_sbs_exit(void)
1041 {
1042 acpi_bus_unregister_driver(&acpi_sbs_driver);
1043 acpi_sbs_rmdirs();
1044 return;
1045 }
1046
1047 module_init(acpi_sbs_init);
1048 module_exit(acpi_sbs_exit);
kernel source for telekom puls (alcatel/mediatek)