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ASoC: TWL4030: Add functionalty to reset the registers
[deliverable/linux.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 PREFIX "ACPI: "
50
51 #define ACPI_SBS_CLASS "sbs"
52 #define ACPI_AC_CLASS "ac_adapter"
53 #define ACPI_BATTERY_CLASS "battery"
54 #define ACPI_SBS_DEVICE_NAME "Smart Battery System"
55 #define ACPI_SBS_FILE_INFO "info"
56 #define ACPI_SBS_FILE_STATE "state"
57 #define ACPI_SBS_FILE_ALARM "alarm"
58 #define ACPI_BATTERY_DIR_NAME "BAT%i"
59 #define ACPI_AC_DIR_NAME "AC0"
60
61 #define ACPI_SBS_NOTIFY_STATUS 0x80
62 #define ACPI_SBS_NOTIFY_INFO 0x81
63
64 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
65 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
66 MODULE_LICENSE("GPL");
67
68 static unsigned int cache_time = 1000;
69 module_param(cache_time, uint, 0644);
70 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
71
72 extern struct proc_dir_entry *acpi_lock_ac_dir(void);
73 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
74 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
75 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
76
77 #define MAX_SBS_BAT 4
78 #define ACPI_SBS_BLOCK_MAX 32
79
80 static const struct acpi_device_id sbs_device_ids[] = {
81 {"ACPI0002", 0},
82 {"", 0},
83 };
84 MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
85
86 struct acpi_battery {
87 #ifdef CONFIG_ACPI_SYSFS_POWER
88 struct power_supply bat;
89 #endif
90 struct acpi_sbs *sbs;
91 #ifdef CONFIG_ACPI_PROCFS_POWER
92 struct proc_dir_entry *proc_entry;
93 #endif
94 unsigned long update_time;
95 char name[8];
96 char manufacturer_name[ACPI_SBS_BLOCK_MAX];
97 char device_name[ACPI_SBS_BLOCK_MAX];
98 char device_chemistry[ACPI_SBS_BLOCK_MAX];
99 u16 alarm_capacity;
100 u16 full_charge_capacity;
101 u16 design_capacity;
102 u16 design_voltage;
103 u16 serial_number;
104 u16 cycle_count;
105 u16 temp_now;
106 u16 voltage_now;
107 s16 rate_now;
108 s16 rate_avg;
109 u16 capacity_now;
110 u16 state_of_charge;
111 u16 state;
112 u16 mode;
113 u16 spec;
114 u8 id;
115 u8 present:1;
116 u8 have_sysfs_alarm:1;
117 };
118
119 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
120
121 struct acpi_sbs {
122 #ifdef CONFIG_ACPI_SYSFS_POWER
123 struct power_supply charger;
124 #endif
125 struct acpi_device *device;
126 struct acpi_smb_hc *hc;
127 struct mutex lock;
128 #ifdef CONFIG_ACPI_PROCFS_POWER
129 struct proc_dir_entry *charger_entry;
130 #endif
131 struct acpi_battery battery[MAX_SBS_BAT];
132 u8 batteries_supported:4;
133 u8 manager_present:1;
134 u8 charger_present:1;
135 };
136
137 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
138
139 static inline int battery_scale(int log)
140 {
141 int scale = 1;
142 while (log--)
143 scale *= 10;
144 return scale;
145 }
146
147 static inline int acpi_battery_vscale(struct acpi_battery *battery)
148 {
149 return battery_scale((battery->spec & 0x0f00) >> 8);
150 }
151
152 static inline int acpi_battery_ipscale(struct acpi_battery *battery)
153 {
154 return battery_scale((battery->spec & 0xf000) >> 12);
155 }
156
157 static inline int acpi_battery_mode(struct acpi_battery *battery)
158 {
159 return (battery->mode & 0x8000);
160 }
161
162 static inline int acpi_battery_scale(struct acpi_battery *battery)
163 {
164 return (acpi_battery_mode(battery) ? 10 : 1) *
165 acpi_battery_ipscale(battery);
166 }
167
168 #ifdef CONFIG_ACPI_SYSFS_POWER
169 static int sbs_get_ac_property(struct power_supply *psy,
170 enum power_supply_property psp,
171 union power_supply_propval *val)
172 {
173 struct acpi_sbs *sbs = to_acpi_sbs(psy);
174 switch (psp) {
175 case POWER_SUPPLY_PROP_ONLINE:
176 val->intval = sbs->charger_present;
177 break;
178 default:
179 return -EINVAL;
180 }
181 return 0;
182 }
183
184 static int acpi_battery_technology(struct acpi_battery *battery)
185 {
186 if (!strcasecmp("NiCd", battery->device_chemistry))
187 return POWER_SUPPLY_TECHNOLOGY_NiCd;
188 if (!strcasecmp("NiMH", battery->device_chemistry))
189 return POWER_SUPPLY_TECHNOLOGY_NiMH;
190 if (!strcasecmp("LION", battery->device_chemistry))
191 return POWER_SUPPLY_TECHNOLOGY_LION;
192 if (!strcasecmp("LiP", battery->device_chemistry))
193 return POWER_SUPPLY_TECHNOLOGY_LIPO;
194 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
195 }
196
197 static int acpi_sbs_battery_get_property(struct power_supply *psy,
198 enum power_supply_property psp,
199 union power_supply_propval *val)
200 {
201 struct acpi_battery *battery = to_acpi_battery(psy);
202
203 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
204 return -ENODEV;
205 switch (psp) {
206 case POWER_SUPPLY_PROP_STATUS:
207 if (battery->rate_now < 0)
208 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
209 else if (battery->rate_now > 0)
210 val->intval = POWER_SUPPLY_STATUS_CHARGING;
211 else
212 val->intval = POWER_SUPPLY_STATUS_FULL;
213 break;
214 case POWER_SUPPLY_PROP_PRESENT:
215 val->intval = battery->present;
216 break;
217 case POWER_SUPPLY_PROP_TECHNOLOGY:
218 val->intval = acpi_battery_technology(battery);
219 break;
220 case POWER_SUPPLY_PROP_CYCLE_COUNT:
221 val->intval = battery->cycle_count;
222 break;
223 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
224 val->intval = battery->design_voltage *
225 acpi_battery_vscale(battery) * 1000;
226 break;
227 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
228 val->intval = battery->voltage_now *
229 acpi_battery_vscale(battery) * 1000;
230 break;
231 case POWER_SUPPLY_PROP_CURRENT_NOW:
232 case POWER_SUPPLY_PROP_POWER_NOW:
233 val->intval = abs(battery->rate_now) *
234 acpi_battery_ipscale(battery) * 1000;
235 break;
236 case POWER_SUPPLY_PROP_CURRENT_AVG:
237 case POWER_SUPPLY_PROP_POWER_AVG:
238 val->intval = abs(battery->rate_avg) *
239 acpi_battery_ipscale(battery) * 1000;
240 break;
241 case POWER_SUPPLY_PROP_CAPACITY:
242 val->intval = battery->state_of_charge;
243 break;
244 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
245 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
246 val->intval = battery->design_capacity *
247 acpi_battery_scale(battery) * 1000;
248 break;
249 case POWER_SUPPLY_PROP_CHARGE_FULL:
250 case POWER_SUPPLY_PROP_ENERGY_FULL:
251 val->intval = battery->full_charge_capacity *
252 acpi_battery_scale(battery) * 1000;
253 break;
254 case POWER_SUPPLY_PROP_CHARGE_NOW:
255 case POWER_SUPPLY_PROP_ENERGY_NOW:
256 val->intval = battery->capacity_now *
257 acpi_battery_scale(battery) * 1000;
258 break;
259 case POWER_SUPPLY_PROP_TEMP:
260 val->intval = battery->temp_now - 2730; // dK -> dC
261 break;
262 case POWER_SUPPLY_PROP_MODEL_NAME:
263 val->strval = battery->device_name;
264 break;
265 case POWER_SUPPLY_PROP_MANUFACTURER:
266 val->strval = battery->manufacturer_name;
267 break;
268 default:
269 return -EINVAL;
270 }
271 return 0;
272 }
273
274 static enum power_supply_property sbs_ac_props[] = {
275 POWER_SUPPLY_PROP_ONLINE,
276 };
277
278 static enum power_supply_property sbs_charge_battery_props[] = {
279 POWER_SUPPLY_PROP_STATUS,
280 POWER_SUPPLY_PROP_PRESENT,
281 POWER_SUPPLY_PROP_TECHNOLOGY,
282 POWER_SUPPLY_PROP_CYCLE_COUNT,
283 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
284 POWER_SUPPLY_PROP_VOLTAGE_NOW,
285 POWER_SUPPLY_PROP_CURRENT_NOW,
286 POWER_SUPPLY_PROP_CURRENT_AVG,
287 POWER_SUPPLY_PROP_CAPACITY,
288 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
289 POWER_SUPPLY_PROP_CHARGE_FULL,
290 POWER_SUPPLY_PROP_CHARGE_NOW,
291 POWER_SUPPLY_PROP_TEMP,
292 POWER_SUPPLY_PROP_MODEL_NAME,
293 POWER_SUPPLY_PROP_MANUFACTURER,
294 };
295
296 static enum power_supply_property sbs_energy_battery_props[] = {
297 POWER_SUPPLY_PROP_STATUS,
298 POWER_SUPPLY_PROP_PRESENT,
299 POWER_SUPPLY_PROP_TECHNOLOGY,
300 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
301 POWER_SUPPLY_PROP_VOLTAGE_NOW,
302 POWER_SUPPLY_PROP_CURRENT_NOW,
303 POWER_SUPPLY_PROP_CURRENT_AVG,
304 POWER_SUPPLY_PROP_POWER_NOW,
305 POWER_SUPPLY_PROP_POWER_AVG,
306 POWER_SUPPLY_PROP_CAPACITY,
307 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
308 POWER_SUPPLY_PROP_ENERGY_FULL,
309 POWER_SUPPLY_PROP_ENERGY_NOW,
310 POWER_SUPPLY_PROP_TEMP,
311 POWER_SUPPLY_PROP_MODEL_NAME,
312 POWER_SUPPLY_PROP_MANUFACTURER,
313 };
314
315 #endif
316
317 /* --------------------------------------------------------------------------
318 Smart Battery System Management
319 -------------------------------------------------------------------------- */
320
321 struct acpi_battery_reader {
322 u8 command; /* command for battery */
323 u8 mode; /* word or block? */
324 size_t offset; /* offset inside struct acpi_sbs_battery */
325 };
326
327 static struct acpi_battery_reader info_readers[] = {
328 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
329 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
330 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
331 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
332 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
333 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
334 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
335 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
336 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
337 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
338 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
339 };
340
341 static struct acpi_battery_reader state_readers[] = {
342 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
343 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
344 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
345 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
346 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
347 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
348 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
349 };
350
351 static int acpi_manager_get_info(struct acpi_sbs *sbs)
352 {
353 int result = 0;
354 u16 battery_system_info;
355
356 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
357 0x04, (u8 *)&battery_system_info);
358 if (!result)
359 sbs->batteries_supported = battery_system_info & 0x000f;
360 return result;
361 }
362
363 static int acpi_battery_get_info(struct acpi_battery *battery)
364 {
365 int i, result = 0;
366
367 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
368 result = acpi_smbus_read(battery->sbs->hc,
369 info_readers[i].mode,
370 ACPI_SBS_BATTERY,
371 info_readers[i].command,
372 (u8 *) battery +
373 info_readers[i].offset);
374 if (result)
375 break;
376 }
377 return result;
378 }
379
380 static int acpi_battery_get_state(struct acpi_battery *battery)
381 {
382 int i, result = 0;
383
384 if (battery->update_time &&
385 time_before(jiffies, battery->update_time +
386 msecs_to_jiffies(cache_time)))
387 return 0;
388 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
389 result = acpi_smbus_read(battery->sbs->hc,
390 state_readers[i].mode,
391 ACPI_SBS_BATTERY,
392 state_readers[i].command,
393 (u8 *)battery +
394 state_readers[i].offset);
395 if (result)
396 goto end;
397 }
398 end:
399 battery->update_time = jiffies;
400 return result;
401 }
402
403 static int acpi_battery_get_alarm(struct acpi_battery *battery)
404 {
405 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
406 ACPI_SBS_BATTERY, 0x01,
407 (u8 *)&battery->alarm_capacity);
408 }
409
410 static int acpi_battery_set_alarm(struct acpi_battery *battery)
411 {
412 struct acpi_sbs *sbs = battery->sbs;
413 u16 value, sel = 1 << (battery->id + 12);
414
415 int ret;
416
417
418 if (sbs->manager_present) {
419 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
420 0x01, (u8 *)&value);
421 if (ret)
422 goto end;
423 if ((value & 0xf000) != sel) {
424 value &= 0x0fff;
425 value |= sel;
426 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
427 ACPI_SBS_MANAGER,
428 0x01, (u8 *)&value, 2);
429 if (ret)
430 goto end;
431 }
432 }
433 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
434 0x01, (u8 *)&battery->alarm_capacity, 2);
435 end:
436 return ret;
437 }
438
439 static int acpi_ac_get_present(struct acpi_sbs *sbs)
440 {
441 int result;
442 u16 status;
443
444 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
445 0x13, (u8 *) & status);
446 if (!result)
447 sbs->charger_present = (status >> 15) & 0x1;
448 return result;
449 }
450
451 #ifdef CONFIG_ACPI_SYSFS_POWER
452 static ssize_t acpi_battery_alarm_show(struct device *dev,
453 struct device_attribute *attr,
454 char *buf)
455 {
456 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
457 acpi_battery_get_alarm(battery);
458 return sprintf(buf, "%d\n", battery->alarm_capacity *
459 acpi_battery_scale(battery) * 1000);
460 }
461
462 static ssize_t acpi_battery_alarm_store(struct device *dev,
463 struct device_attribute *attr,
464 const char *buf, size_t count)
465 {
466 unsigned long x;
467 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
468 if (sscanf(buf, "%ld\n", &x) == 1)
469 battery->alarm_capacity = x /
470 (1000 * acpi_battery_scale(battery));
471 if (battery->present)
472 acpi_battery_set_alarm(battery);
473 return count;
474 }
475
476 static struct device_attribute alarm_attr = {
477 .attr = {.name = "alarm", .mode = 0644},
478 .show = acpi_battery_alarm_show,
479 .store = acpi_battery_alarm_store,
480 };
481 #endif
482
483 /* --------------------------------------------------------------------------
484 FS Interface (/proc/acpi)
485 -------------------------------------------------------------------------- */
486
487 #ifdef CONFIG_ACPI_PROCFS_POWER
488 /* Generic Routines */
489 static int
490 acpi_sbs_add_fs(struct proc_dir_entry **dir,
491 struct proc_dir_entry *parent_dir,
492 char *dir_name,
493 const struct file_operations *info_fops,
494 const struct file_operations *state_fops,
495 const struct file_operations *alarm_fops, void *data)
496 {
497 if (!*dir) {
498 *dir = proc_mkdir(dir_name, parent_dir);
499 if (!*dir) {
500 return -ENODEV;
501 }
502 }
503
504 /* 'info' [R] */
505 if (info_fops)
506 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
507 info_fops, data);
508
509 /* 'state' [R] */
510 if (state_fops)
511 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
512 state_fops, data);
513
514 /* 'alarm' [R/W] */
515 if (alarm_fops)
516 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
517 alarm_fops, data);
518 return 0;
519 }
520
521 static void
522 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
523 struct proc_dir_entry *parent_dir)
524 {
525 if (*dir) {
526 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
527 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
528 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
529 remove_proc_entry((*dir)->name, parent_dir);
530 *dir = NULL;
531 }
532 }
533
534 /* Smart Battery Interface */
535 static struct proc_dir_entry *acpi_battery_dir = NULL;
536
537 static inline char *acpi_battery_units(struct acpi_battery *battery)
538 {
539 return acpi_battery_mode(battery) ? " mW" : " mA";
540 }
541
542
543 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
544 {
545 struct acpi_battery *battery = seq->private;
546 struct acpi_sbs *sbs = battery->sbs;
547 int result = 0;
548
549 mutex_lock(&sbs->lock);
550
551 seq_printf(seq, "present: %s\n",
552 (battery->present) ? "yes" : "no");
553 if (!battery->present)
554 goto end;
555
556 seq_printf(seq, "design capacity: %i%sh\n",
557 battery->design_capacity * acpi_battery_scale(battery),
558 acpi_battery_units(battery));
559 seq_printf(seq, "last full capacity: %i%sh\n",
560 battery->full_charge_capacity * acpi_battery_scale(battery),
561 acpi_battery_units(battery));
562 seq_printf(seq, "battery technology: rechargeable\n");
563 seq_printf(seq, "design voltage: %i mV\n",
564 battery->design_voltage * acpi_battery_vscale(battery));
565 seq_printf(seq, "design capacity warning: unknown\n");
566 seq_printf(seq, "design capacity low: unknown\n");
567 seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
568 seq_printf(seq, "capacity granularity 1: unknown\n");
569 seq_printf(seq, "capacity granularity 2: unknown\n");
570 seq_printf(seq, "model number: %s\n", battery->device_name);
571 seq_printf(seq, "serial number: %i\n",
572 battery->serial_number);
573 seq_printf(seq, "battery type: %s\n",
574 battery->device_chemistry);
575 seq_printf(seq, "OEM info: %s\n",
576 battery->manufacturer_name);
577 end:
578 mutex_unlock(&sbs->lock);
579 return result;
580 }
581
582 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
583 {
584 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
585 }
586
587 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
588 {
589 struct acpi_battery *battery = seq->private;
590 struct acpi_sbs *sbs = battery->sbs;
591 int rate;
592
593 mutex_lock(&sbs->lock);
594 seq_printf(seq, "present: %s\n",
595 (battery->present) ? "yes" : "no");
596 if (!battery->present)
597 goto end;
598
599 acpi_battery_get_state(battery);
600 seq_printf(seq, "capacity state: %s\n",
601 (battery->state & 0x0010) ? "critical" : "ok");
602 seq_printf(seq, "charging state: %s\n",
603 (battery->rate_now < 0) ? "discharging" :
604 ((battery->rate_now > 0) ? "charging" : "charged"));
605 rate = abs(battery->rate_now) * acpi_battery_ipscale(battery);
606 rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
607 acpi_battery_vscale(battery)/1000):1;
608 seq_printf(seq, "present rate: %d%s\n", rate,
609 acpi_battery_units(battery));
610 seq_printf(seq, "remaining capacity: %i%sh\n",
611 battery->capacity_now * acpi_battery_scale(battery),
612 acpi_battery_units(battery));
613 seq_printf(seq, "present voltage: %i mV\n",
614 battery->voltage_now * acpi_battery_vscale(battery));
615
616 end:
617 mutex_unlock(&sbs->lock);
618 return 0;
619 }
620
621 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
622 {
623 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
624 }
625
626 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
627 {
628 struct acpi_battery *battery = seq->private;
629 struct acpi_sbs *sbs = battery->sbs;
630 int result = 0;
631
632 mutex_lock(&sbs->lock);
633
634 if (!battery->present) {
635 seq_printf(seq, "present: no\n");
636 goto end;
637 }
638
639 acpi_battery_get_alarm(battery);
640 seq_printf(seq, "alarm: ");
641 if (battery->alarm_capacity)
642 seq_printf(seq, "%i%sh\n",
643 battery->alarm_capacity *
644 acpi_battery_scale(battery),
645 acpi_battery_units(battery));
646 else
647 seq_printf(seq, "disabled\n");
648 end:
649 mutex_unlock(&sbs->lock);
650 return result;
651 }
652
653 static ssize_t
654 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
655 size_t count, loff_t * ppos)
656 {
657 struct seq_file *seq = file->private_data;
658 struct acpi_battery *battery = seq->private;
659 struct acpi_sbs *sbs = battery->sbs;
660 char alarm_string[12] = { '\0' };
661 int result = 0;
662 mutex_lock(&sbs->lock);
663 if (!battery->present) {
664 result = -ENODEV;
665 goto end;
666 }
667 if (count > sizeof(alarm_string) - 1) {
668 result = -EINVAL;
669 goto end;
670 }
671 if (copy_from_user(alarm_string, buffer, count)) {
672 result = -EFAULT;
673 goto end;
674 }
675 alarm_string[count] = 0;
676 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
677 acpi_battery_scale(battery);
678 acpi_battery_set_alarm(battery);
679 end:
680 mutex_unlock(&sbs->lock);
681 if (result)
682 return result;
683 return count;
684 }
685
686 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
687 {
688 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
689 }
690
691 static const struct file_operations acpi_battery_info_fops = {
692 .open = acpi_battery_info_open_fs,
693 .read = seq_read,
694 .llseek = seq_lseek,
695 .release = single_release,
696 .owner = THIS_MODULE,
697 };
698
699 static const struct file_operations acpi_battery_state_fops = {
700 .open = acpi_battery_state_open_fs,
701 .read = seq_read,
702 .llseek = seq_lseek,
703 .release = single_release,
704 .owner = THIS_MODULE,
705 };
706
707 static const struct file_operations acpi_battery_alarm_fops = {
708 .open = acpi_battery_alarm_open_fs,
709 .read = seq_read,
710 .write = acpi_battery_write_alarm,
711 .llseek = seq_lseek,
712 .release = single_release,
713 .owner = THIS_MODULE,
714 };
715
716 /* Legacy AC Adapter Interface */
717
718 static struct proc_dir_entry *acpi_ac_dir = NULL;
719
720 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
721 {
722
723 struct acpi_sbs *sbs = seq->private;
724
725 mutex_lock(&sbs->lock);
726
727 seq_printf(seq, "state: %s\n",
728 sbs->charger_present ? "on-line" : "off-line");
729
730 mutex_unlock(&sbs->lock);
731 return 0;
732 }
733
734 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
735 {
736 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
737 }
738
739 static const struct file_operations acpi_ac_state_fops = {
740 .open = acpi_ac_state_open_fs,
741 .read = seq_read,
742 .llseek = seq_lseek,
743 .release = single_release,
744 .owner = THIS_MODULE,
745 };
746
747 #endif
748
749 /* --------------------------------------------------------------------------
750 Driver Interface
751 -------------------------------------------------------------------------- */
752 static int acpi_battery_read(struct acpi_battery *battery)
753 {
754 int result = 0, saved_present = battery->present;
755 u16 state;
756
757 if (battery->sbs->manager_present) {
758 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
759 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
760 if (!result)
761 battery->present = state & (1 << battery->id);
762 state &= 0x0fff;
763 state |= 1 << (battery->id + 12);
764 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
765 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
766 } else if (battery->id == 0)
767 battery->present = 1;
768 if (result || !battery->present)
769 return result;
770
771 if (saved_present != battery->present) {
772 battery->update_time = 0;
773 result = acpi_battery_get_info(battery);
774 if (result)
775 return result;
776 }
777 result = acpi_battery_get_state(battery);
778 return result;
779 }
780
781 /* Smart Battery */
782 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
783 {
784 struct acpi_battery *battery = &sbs->battery[id];
785 int result;
786
787 battery->id = id;
788 battery->sbs = sbs;
789 result = acpi_battery_read(battery);
790 if (result)
791 return result;
792
793 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
794 #ifdef CONFIG_ACPI_PROCFS_POWER
795 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
796 battery->name, &acpi_battery_info_fops,
797 &acpi_battery_state_fops, &acpi_battery_alarm_fops,
798 battery);
799 #endif
800 #ifdef CONFIG_ACPI_SYSFS_POWER
801 battery->bat.name = battery->name;
802 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
803 if (!acpi_battery_mode(battery)) {
804 battery->bat.properties = sbs_charge_battery_props;
805 battery->bat.num_properties =
806 ARRAY_SIZE(sbs_charge_battery_props);
807 } else {
808 battery->bat.properties = sbs_energy_battery_props;
809 battery->bat.num_properties =
810 ARRAY_SIZE(sbs_energy_battery_props);
811 }
812 battery->bat.get_property = acpi_sbs_battery_get_property;
813 result = power_supply_register(&sbs->device->dev, &battery->bat);
814 if (result)
815 goto end;
816 result = device_create_file(battery->bat.dev, &alarm_attr);
817 if (result)
818 goto end;
819 battery->have_sysfs_alarm = 1;
820 end:
821 #endif
822 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
823 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
824 battery->name, battery->present ? "present" : "absent");
825 return result;
826 }
827
828 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
829 {
830 #if defined(CONFIG_ACPI_SYSFS_POWER) || defined(CONFIG_ACPI_PROCFS_POWER)
831 struct acpi_battery *battery = &sbs->battery[id];
832 #endif
833
834 #ifdef CONFIG_ACPI_SYSFS_POWER
835 if (battery->bat.dev) {
836 if (battery->have_sysfs_alarm)
837 device_remove_file(battery->bat.dev, &alarm_attr);
838 power_supply_unregister(&battery->bat);
839 }
840 #endif
841 #ifdef CONFIG_ACPI_PROCFS_POWER
842 if (battery->proc_entry)
843 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
844 #endif
845 }
846
847 static int acpi_charger_add(struct acpi_sbs *sbs)
848 {
849 int result;
850
851 result = acpi_ac_get_present(sbs);
852 if (result)
853 goto end;
854 #ifdef CONFIG_ACPI_PROCFS_POWER
855 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
856 ACPI_AC_DIR_NAME, NULL,
857 &acpi_ac_state_fops, NULL, sbs);
858 if (result)
859 goto end;
860 #endif
861 #ifdef CONFIG_ACPI_SYSFS_POWER
862 sbs->charger.name = "sbs-charger";
863 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
864 sbs->charger.properties = sbs_ac_props;
865 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
866 sbs->charger.get_property = sbs_get_ac_property;
867 power_supply_register(&sbs->device->dev, &sbs->charger);
868 #endif
869 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
870 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
871 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
872 end:
873 return result;
874 }
875
876 static void acpi_charger_remove(struct acpi_sbs *sbs)
877 {
878 #ifdef CONFIG_ACPI_SYSFS_POWER
879 if (sbs->charger.dev)
880 power_supply_unregister(&sbs->charger);
881 #endif
882 #ifdef CONFIG_ACPI_PROCFS_POWER
883 if (sbs->charger_entry)
884 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
885 #endif
886 }
887
888 static void acpi_sbs_callback(void *context)
889 {
890 int id;
891 struct acpi_sbs *sbs = context;
892 struct acpi_battery *bat;
893 u8 saved_charger_state = sbs->charger_present;
894 u8 saved_battery_state;
895 acpi_ac_get_present(sbs);
896 if (sbs->charger_present != saved_charger_state) {
897 #ifdef CONFIG_ACPI_PROC_EVENT
898 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
899 ACPI_SBS_NOTIFY_STATUS,
900 sbs->charger_present);
901 #endif
902 #ifdef CONFIG_ACPI_SYSFS_POWER
903 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
904 #endif
905 }
906 if (sbs->manager_present) {
907 for (id = 0; id < MAX_SBS_BAT; ++id) {
908 if (!(sbs->batteries_supported & (1 << id)))
909 continue;
910 bat = &sbs->battery[id];
911 saved_battery_state = bat->present;
912 acpi_battery_read(bat);
913 if (saved_battery_state == bat->present)
914 continue;
915 #ifdef CONFIG_ACPI_PROC_EVENT
916 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
917 bat->name,
918 ACPI_SBS_NOTIFY_STATUS,
919 bat->present);
920 #endif
921 #ifdef CONFIG_ACPI_SYSFS_POWER
922 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
923 #endif
924 }
925 }
926 }
927
928 static int acpi_sbs_remove(struct acpi_device *device, int type);
929
930 static int acpi_sbs_add(struct acpi_device *device)
931 {
932 struct acpi_sbs *sbs;
933 int result = 0;
934 int id;
935
936 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
937 if (!sbs) {
938 result = -ENOMEM;
939 goto end;
940 }
941
942 mutex_init(&sbs->lock);
943
944 sbs->hc = acpi_driver_data(device->parent);
945 sbs->device = device;
946 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
947 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
948 device->driver_data = sbs;
949
950 result = acpi_charger_add(sbs);
951 if (result)
952 goto end;
953
954 result = acpi_manager_get_info(sbs);
955 if (!result) {
956 sbs->manager_present = 1;
957 for (id = 0; id < MAX_SBS_BAT; ++id)
958 if ((sbs->batteries_supported & (1 << id)))
959 acpi_battery_add(sbs, id);
960 } else
961 acpi_battery_add(sbs, 0);
962 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
963 end:
964 if (result)
965 acpi_sbs_remove(device, 0);
966 return result;
967 }
968
969 static int acpi_sbs_remove(struct acpi_device *device, int type)
970 {
971 struct acpi_sbs *sbs;
972 int id;
973
974 if (!device)
975 return -EINVAL;
976 sbs = acpi_driver_data(device);
977 if (!sbs)
978 return -EINVAL;
979 mutex_lock(&sbs->lock);
980 acpi_smbus_unregister_callback(sbs->hc);
981 for (id = 0; id < MAX_SBS_BAT; ++id)
982 acpi_battery_remove(sbs, id);
983 acpi_charger_remove(sbs);
984 mutex_unlock(&sbs->lock);
985 mutex_destroy(&sbs->lock);
986 kfree(sbs);
987 return 0;
988 }
989
990 static void acpi_sbs_rmdirs(void)
991 {
992 #ifdef CONFIG_ACPI_PROCFS_POWER
993 if (acpi_ac_dir) {
994 acpi_unlock_ac_dir(acpi_ac_dir);
995 acpi_ac_dir = NULL;
996 }
997 if (acpi_battery_dir) {
998 acpi_unlock_battery_dir(acpi_battery_dir);
999 acpi_battery_dir = NULL;
1000 }
1001 #endif
1002 }
1003
1004 static int acpi_sbs_resume(struct acpi_device *device)
1005 {
1006 struct acpi_sbs *sbs;
1007 if (!device)
1008 return -EINVAL;
1009 sbs = device->driver_data;
1010 acpi_sbs_callback(sbs);
1011 return 0;
1012 }
1013
1014 static struct acpi_driver acpi_sbs_driver = {
1015 .name = "sbs",
1016 .class = ACPI_SBS_CLASS,
1017 .ids = sbs_device_ids,
1018 .ops = {
1019 .add = acpi_sbs_add,
1020 .remove = acpi_sbs_remove,
1021 .resume = acpi_sbs_resume,
1022 },
1023 };
1024
1025 static int __init acpi_sbs_init(void)
1026 {
1027 int result = 0;
1028
1029 if (acpi_disabled)
1030 return -ENODEV;
1031 #ifdef CONFIG_ACPI_PROCFS_POWER
1032 acpi_ac_dir = acpi_lock_ac_dir();
1033 if (!acpi_ac_dir)
1034 return -ENODEV;
1035 acpi_battery_dir = acpi_lock_battery_dir();
1036 if (!acpi_battery_dir) {
1037 acpi_sbs_rmdirs();
1038 return -ENODEV;
1039 }
1040 #endif
1041 result = acpi_bus_register_driver(&acpi_sbs_driver);
1042 if (result < 0) {
1043 acpi_sbs_rmdirs();
1044 return -ENODEV;
1045 }
1046 return 0;
1047 }
1048
1049 static void __exit acpi_sbs_exit(void)
1050 {
1051 acpi_bus_unregister_driver(&acpi_sbs_driver);
1052 acpi_sbs_rmdirs();
1053 return;
1054 }
1055
1056 module_init(acpi_sbs_init);
1057 module_exit(acpi_sbs_exit);
Linux kernel - Deliverables
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