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ACPI: Split out control for /proc/acpi entries from battery, ac, and sbs.
[linux-2.6/mini2440.git] / drivers / acpi / sbs.c
blob278d20f9366a6227b92f741b518450a6be333a27
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 #include <linux/power_supply.h>
44
45 #include "sbshc.h"
46
47 #define ACPI_SBS_CLASS "sbs"
48 #define ACPI_AC_CLASS "ac_adapter"
49 #define ACPI_BATTERY_CLASS "battery"
50 #define ACPI_SBS_DEVICE_NAME "Smart Battery System"
51 #define ACPI_SBS_FILE_INFO "info"
52 #define ACPI_SBS_FILE_STATE "state"
53 #define ACPI_SBS_FILE_ALARM "alarm"
54 #define ACPI_BATTERY_DIR_NAME "BAT%i"
55 #define ACPI_AC_DIR_NAME "AC0"
56
57 enum acpi_sbs_device_addr {
58 ACPI_SBS_CHARGER = 0x9,
59 ACPI_SBS_MANAGER = 0xa,
60 ACPI_SBS_BATTERY = 0xb,
61 };
62
63 #define ACPI_SBS_NOTIFY_STATUS 0x80
64 #define ACPI_SBS_NOTIFY_INFO 0x81
65
66 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
67 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
68 MODULE_LICENSE("GPL");
69
70 static unsigned int cache_time = 1000;
71 module_param(cache_time, uint, 0644);
72 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
73
74 extern struct proc_dir_entry *acpi_lock_ac_dir(void);
75 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
76 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
77 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
78
79 #define MAX_SBS_BAT 4
80 #define ACPI_SBS_BLOCK_MAX 32
81
82 static const struct acpi_device_id sbs_device_ids[] = {
83 {"ACPI0002", 0},
84 {"", 0},
85 };
86 MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
87
88 struct acpi_battery {
89 struct power_supply bat;
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 current_now;
108 s16 current_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 };
117
118 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
119
120 struct acpi_sbs {
121 struct power_supply charger;
122 struct acpi_device *device;
123 struct acpi_smb_hc *hc;
124 struct mutex lock;
125 #ifdef CONFIG_ACPI_PROCFS_POWER
126 struct proc_dir_entry *charger_entry;
127 #endif
128 struct acpi_battery battery[MAX_SBS_BAT];
129 u8 batteries_supported:4;
130 u8 manager_present:1;
131 u8 charger_present:1;
132 };
133
134 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
135
136 static inline int battery_scale(int log)
137 {
138 int scale = 1;
139 while (log--)
140 scale *= 10;
141 return scale;
142 }
143
144 static inline int acpi_battery_vscale(struct acpi_battery *battery)
145 {
146 return battery_scale((battery->spec & 0x0f00) >> 8);
147 }
148
149 static inline int acpi_battery_ipscale(struct acpi_battery *battery)
150 {
151 return battery_scale((battery->spec & 0xf000) >> 12);
152 }
153
154 static inline int acpi_battery_mode(struct acpi_battery *battery)
155 {
156 return (battery->mode & 0x8000);
157 }
158
159 static inline int acpi_battery_scale(struct acpi_battery *battery)
160 {
161 return (acpi_battery_mode(battery) ? 10 : 1) *
162 acpi_battery_ipscale(battery);
163 }
164
165 static int sbs_get_ac_property(struct power_supply *psy,
166 enum power_supply_property psp,
167 union power_supply_propval *val)
168 {
169 struct acpi_sbs *sbs = to_acpi_sbs(psy);
170 switch (psp) {
171 case POWER_SUPPLY_PROP_ONLINE:
172 val->intval = sbs->charger_present;
173 break;
174 default:
175 return -EINVAL;
176 }
177 return 0;
178 }
179
180 static int acpi_battery_technology(struct acpi_battery *battery)
181 {
182 if (!strcasecmp("NiCd", battery->device_chemistry))
183 return POWER_SUPPLY_TECHNOLOGY_NiCd;
184 if (!strcasecmp("NiMH", battery->device_chemistry))
185 return POWER_SUPPLY_TECHNOLOGY_NiMH;
186 if (!strcasecmp("LION", battery->device_chemistry))
187 return POWER_SUPPLY_TECHNOLOGY_LION;
188 if (!strcasecmp("LiP", battery->device_chemistry))
189 return POWER_SUPPLY_TECHNOLOGY_LIPO;
190 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
191 }
192
193 static int acpi_sbs_battery_get_property(struct power_supply *psy,
194 enum power_supply_property psp,
195 union power_supply_propval *val)
196 {
197 struct acpi_battery *battery = to_acpi_battery(psy);
198
199 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
200 return -ENODEV;
201 switch (psp) {
202 case POWER_SUPPLY_PROP_STATUS:
203 if (battery->current_now < 0)
204 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
205 else if (battery->current_now > 0)
206 val->intval = POWER_SUPPLY_STATUS_CHARGING;
207 else
208 val->intval = POWER_SUPPLY_STATUS_FULL;
209 break;
210 case POWER_SUPPLY_PROP_PRESENT:
211 val->intval = battery->present;
212 break;
213 case POWER_SUPPLY_PROP_TECHNOLOGY:
214 val->intval = acpi_battery_technology(battery);
215 break;
216 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
217 val->intval = battery->design_voltage *
218 acpi_battery_vscale(battery) * 1000;
219 break;
220 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
221 val->intval = battery->voltage_now *
222 acpi_battery_vscale(battery) * 1000;
223 break;
224 case POWER_SUPPLY_PROP_CURRENT_NOW:
225 val->intval = abs(battery->current_now) *
226 acpi_battery_ipscale(battery) * 1000;
227 break;
228 case POWER_SUPPLY_PROP_CURRENT_AVG:
229 val->intval = abs(battery->current_avg) *
230 acpi_battery_ipscale(battery) * 1000;
231 break;
232 case POWER_SUPPLY_PROP_CAPACITY:
233 val->intval = battery->state_of_charge;
234 break;
235 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
236 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
237 val->intval = battery->design_capacity *
238 acpi_battery_scale(battery) * 1000;
239 break;
240 case POWER_SUPPLY_PROP_CHARGE_FULL:
241 case POWER_SUPPLY_PROP_ENERGY_FULL:
242 val->intval = battery->full_charge_capacity *
243 acpi_battery_scale(battery) * 1000;
244 break;
245 case POWER_SUPPLY_PROP_CHARGE_NOW:
246 case POWER_SUPPLY_PROP_ENERGY_NOW:
247 val->intval = battery->capacity_now *
248 acpi_battery_scale(battery) * 1000;
249 break;
250 case POWER_SUPPLY_PROP_TEMP:
251 val->intval = battery->temp_now - 2730; // dK -> dC
252 break;
253 case POWER_SUPPLY_PROP_MODEL_NAME:
254 val->strval = battery->device_name;
255 break;
256 case POWER_SUPPLY_PROP_MANUFACTURER:
257 val->strval = battery->manufacturer_name;
258 break;
259 default:
260 return -EINVAL;
261 }
262 return 0;
263 }
264
265 static enum power_supply_property sbs_ac_props[] = {
266 POWER_SUPPLY_PROP_ONLINE,
267 };
268
269 static enum power_supply_property sbs_charge_battery_props[] = {
270 POWER_SUPPLY_PROP_STATUS,
271 POWER_SUPPLY_PROP_PRESENT,
272 POWER_SUPPLY_PROP_TECHNOLOGY,
273 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
274 POWER_SUPPLY_PROP_VOLTAGE_NOW,
275 POWER_SUPPLY_PROP_CURRENT_NOW,
276 POWER_SUPPLY_PROP_CURRENT_AVG,
277 POWER_SUPPLY_PROP_CAPACITY,
278 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
279 POWER_SUPPLY_PROP_CHARGE_FULL,
280 POWER_SUPPLY_PROP_CHARGE_NOW,
281 POWER_SUPPLY_PROP_TEMP,
282 POWER_SUPPLY_PROP_MODEL_NAME,
283 POWER_SUPPLY_PROP_MANUFACTURER,
284 };
285
286 static enum power_supply_property sbs_energy_battery_props[] = {
287 POWER_SUPPLY_PROP_STATUS,
288 POWER_SUPPLY_PROP_PRESENT,
289 POWER_SUPPLY_PROP_TECHNOLOGY,
290 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
291 POWER_SUPPLY_PROP_VOLTAGE_NOW,
292 POWER_SUPPLY_PROP_CURRENT_NOW,
293 POWER_SUPPLY_PROP_CURRENT_AVG,
294 POWER_SUPPLY_PROP_CAPACITY,
295 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
296 POWER_SUPPLY_PROP_ENERGY_FULL,
297 POWER_SUPPLY_PROP_ENERGY_NOW,
298 POWER_SUPPLY_PROP_TEMP,
299 POWER_SUPPLY_PROP_MODEL_NAME,
300 POWER_SUPPLY_PROP_MANUFACTURER,
301 };
302
303 /* --------------------------------------------------------------------------
304 Smart Battery System Management
305 -------------------------------------------------------------------------- */
306
307 struct acpi_battery_reader {
308 u8 command; /* command for battery */
309 u8 mode; /* word or block? */
310 size_t offset; /* offset inside struct acpi_sbs_battery */
311 };
312
313 static struct acpi_battery_reader info_readers[] = {
314 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
315 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
316 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
317 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
318 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
319 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
320 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
321 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
322 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
323 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
324 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
325 };
326
327 static struct acpi_battery_reader state_readers[] = {
328 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
329 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
330 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_now)},
331 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_avg)},
332 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
333 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
334 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
335 };
336
337 static int acpi_manager_get_info(struct acpi_sbs *sbs)
338 {
339 int result = 0;
340 u16 battery_system_info;
341
342 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
343 0x04, (u8 *)&battery_system_info);
344 if (!result)
345 sbs->batteries_supported = battery_system_info & 0x000f;
346 return result;
347 }
348
349 static int acpi_battery_get_info(struct acpi_battery *battery)
350 {
351 int i, result = 0;
352
353 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
354 result = acpi_smbus_read(battery->sbs->hc,
355 info_readers[i].mode,
356 ACPI_SBS_BATTERY,
357 info_readers[i].command,
358 (u8 *) battery +
359 info_readers[i].offset);
360 if (result)
361 break;
362 }
363 return result;
364 }
365
366 static int acpi_battery_get_state(struct acpi_battery *battery)
367 {
368 int i, result = 0;
369
370 if (battery->update_time &&
371 time_before(jiffies, battery->update_time +
372 msecs_to_jiffies(cache_time)))
373 return 0;
374 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
375 result = acpi_smbus_read(battery->sbs->hc,
376 state_readers[i].mode,
377 ACPI_SBS_BATTERY,
378 state_readers[i].command,
379 (u8 *)battery +
380 state_readers[i].offset);
381 if (result)
382 goto end;
383 }
384 end:
385 battery->update_time = jiffies;
386 return result;
387 }
388
389 static int acpi_battery_get_alarm(struct acpi_battery *battery)
390 {
391 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
392 ACPI_SBS_BATTERY, 0x01,
393 (u8 *)&battery->alarm_capacity);
394 }
395
396 static int acpi_battery_set_alarm(struct acpi_battery *battery)
397 {
398 struct acpi_sbs *sbs = battery->sbs;
399 u16 value, sel = 1 << (battery->id + 12);
400
401 int ret;
402
403
404 if (sbs->manager_present) {
405 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
406 0x01, (u8 *)&value);
407 if (ret)
408 goto end;
409 if ((value & 0xf000) != sel) {
410 value &= 0x0fff;
411 value |= sel;
412 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
413 ACPI_SBS_MANAGER,
414 0x01, (u8 *)&value, 2);
415 if (ret)
416 goto end;
417 }
418 }
419 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
420 0x01, (u8 *)&battery->alarm_capacity, 2);
421 end:
422 return ret;
423 }
424
425 static int acpi_ac_get_present(struct acpi_sbs *sbs)
426 {
427 int result;
428 u16 status;
429
430 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
431 0x13, (u8 *) & status);
432 if (!result)
433 sbs->charger_present = (status >> 15) & 0x1;
434 return result;
435 }
436
437 static ssize_t acpi_battery_alarm_show(struct device *dev,
438 struct device_attribute *attr,
439 char *buf)
440 {
441 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
442 acpi_battery_get_alarm(battery);
443 return sprintf(buf, "%d\n", battery->alarm_capacity *
444 acpi_battery_scale(battery) * 1000);
445 }
446
447 static ssize_t acpi_battery_alarm_store(struct device *dev,
448 struct device_attribute *attr,
449 const char *buf, size_t count)
450 {
451 unsigned long x;
452 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
453 if (sscanf(buf, "%ld\n", &x) == 1)
454 battery->alarm_capacity = x /
455 (1000 * acpi_battery_scale(battery));
456 if (battery->present)
457 acpi_battery_set_alarm(battery);
458 return count;
459 }
460
461 static struct device_attribute alarm_attr = {
462 .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE},
463 .show = acpi_battery_alarm_show,
464 .store = acpi_battery_alarm_store,
465 };
466
467 /* --------------------------------------------------------------------------
468 FS Interface (/proc/acpi)
469 -------------------------------------------------------------------------- */
470
471 #ifdef CONFIG_ACPI_PROCFS_POWER
472 /* Generic Routines */
473 static int
474 acpi_sbs_add_fs(struct proc_dir_entry **dir,
475 struct proc_dir_entry *parent_dir,
476 char *dir_name,
477 struct file_operations *info_fops,
478 struct file_operations *state_fops,
479 struct file_operations *alarm_fops, void *data)
480 {
481 struct proc_dir_entry *entry = NULL;
482
483 if (!*dir) {
484 *dir = proc_mkdir(dir_name, parent_dir);
485 if (!*dir) {
486 return -ENODEV;
487 }
488 (*dir)->owner = THIS_MODULE;
489 }
490
491 /* 'info' [R] */
492 if (info_fops) {
493 entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
494 if (entry) {
495 entry->proc_fops = info_fops;
496 entry->data = data;
497 entry->owner = THIS_MODULE;
498 }
499 }
500
501 /* 'state' [R] */
502 if (state_fops) {
503 entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
504 if (entry) {
505 entry->proc_fops = state_fops;
506 entry->data = data;
507 entry->owner = THIS_MODULE;
508 }
509 }
510
511 /* 'alarm' [R/W] */
512 if (alarm_fops) {
513 entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
514 if (entry) {
515 entry->proc_fops = alarm_fops;
516 entry->data = data;
517 entry->owner = THIS_MODULE;
518 }
519 }
520 return 0;
521 }
522
523 static void
524 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
525 struct proc_dir_entry *parent_dir)
526 {
527 if (*dir) {
528 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
529 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
530 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
531 remove_proc_entry((*dir)->name, parent_dir);
532 *dir = NULL;
533 }
534 }
535
536 /* Smart Battery Interface */
537 static struct proc_dir_entry *acpi_battery_dir = NULL;
538
539 static inline char *acpi_battery_units(struct acpi_battery *battery)
540 {
541 return acpi_battery_mode(battery) ? " mWh" : " mAh";
542 }
543
544
545 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
546 {
547 struct acpi_battery *battery = seq->private;
548 struct acpi_sbs *sbs = battery->sbs;
549 int result = 0;
550
551 mutex_lock(&sbs->lock);
552
553 seq_printf(seq, "present: %s\n",
554 (battery->present) ? "yes" : "no");
555 if (!battery->present)
556 goto end;
557
558 seq_printf(seq, "design capacity: %i%s\n",
559 battery->design_capacity * acpi_battery_scale(battery),
560 acpi_battery_units(battery));
561 seq_printf(seq, "last full capacity: %i%s\n",
562 battery->full_charge_capacity * acpi_battery_scale(battery),
563 acpi_battery_units(battery));
564 seq_printf(seq, "battery technology: rechargeable\n");
565 seq_printf(seq, "design voltage: %i mV\n",
566 battery->design_voltage * acpi_battery_vscale(battery));
567 seq_printf(seq, "design capacity warning: unknown\n");
568 seq_printf(seq, "design capacity low: unknown\n");
569 seq_printf(seq, "capacity granularity 1: unknown\n");
570 seq_printf(seq, "capacity granularity 2: unknown\n");
571 seq_printf(seq, "model number: %s\n", battery->device_name);
572 seq_printf(seq, "serial number: %i\n",
573 battery->serial_number);
574 seq_printf(seq, "battery type: %s\n",
575 battery->device_chemistry);
576 seq_printf(seq, "OEM info: %s\n",
577 battery->manufacturer_name);
578 end:
579 mutex_unlock(&sbs->lock);
580 return result;
581 }
582
583 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
584 {
585 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
586 }
587
588 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
589 {
590 struct acpi_battery *battery = seq->private;
591 struct acpi_sbs *sbs = battery->sbs;
592 int result = 0;
593
594 mutex_lock(&sbs->lock);
595 seq_printf(seq, "present: %s\n",
596 (battery->present) ? "yes" : "no");
597 if (!battery->present)
598 goto end;
599
600 acpi_battery_get_state(battery);
601 seq_printf(seq, "capacity state: %s\n",
602 (battery->state & 0x0010) ? "critical" : "ok");
603 seq_printf(seq, "charging state: %s\n",
604 (battery->current_now < 0) ? "discharging" :
605 ((battery->current_now > 0) ? "charging" : "charged"));
606 seq_printf(seq, "present rate: %d mA\n",
607 abs(battery->current_now) * acpi_battery_ipscale(battery));
608 seq_printf(seq, "remaining capacity: %i%s\n",
609 battery->capacity_now * acpi_battery_scale(battery),
610 acpi_battery_units(battery));
611 seq_printf(seq, "present voltage: %i mV\n",
612 battery->voltage_now * acpi_battery_vscale(battery));
613
614 end:
615 mutex_unlock(&sbs->lock);
616 return result;
617 }
618
619 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
620 {
621 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
622 }
623
624 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
625 {
626 struct acpi_battery *battery = seq->private;
627 struct acpi_sbs *sbs = battery->sbs;
628 int result = 0;
629
630 mutex_lock(&sbs->lock);
631
632 if (!battery->present) {
633 seq_printf(seq, "present: no\n");
634 goto end;
635 }
636
637 acpi_battery_get_alarm(battery);
638 seq_printf(seq, "alarm: ");
639 if (battery->alarm_capacity)
640 seq_printf(seq, "%i%s\n",
641 battery->alarm_capacity *
642 acpi_battery_scale(battery),
643 acpi_battery_units(battery));
644 else
645 seq_printf(seq, "disabled\n");
646 end:
647 mutex_unlock(&sbs->lock);
648 return result;
649 }
650
651 static ssize_t
652 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
653 size_t count, loff_t * ppos)
654 {
655 struct seq_file *seq = file->private_data;
656 struct acpi_battery *battery = seq->private;
657 struct acpi_sbs *sbs = battery->sbs;
658 char alarm_string[12] = { '\0' };
659 int result = 0;
660 mutex_lock(&sbs->lock);
661 if (!battery->present) {
662 result = -ENODEV;
663 goto end;
664 }
665 if (count > sizeof(alarm_string) - 1) {
666 result = -EINVAL;
667 goto end;
668 }
669 if (copy_from_user(alarm_string, buffer, count)) {
670 result = -EFAULT;
671 goto end;
672 }
673 alarm_string[count] = 0;
674 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
675 acpi_battery_scale(battery);
676 acpi_battery_set_alarm(battery);
677 end:
678 mutex_unlock(&sbs->lock);
679 if (result)
680 return result;
681 return count;
682 }
683
684 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
685 {
686 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
687 }
688
689 static struct file_operations acpi_battery_info_fops = {
690 .open = acpi_battery_info_open_fs,
691 .read = seq_read,
692 .llseek = seq_lseek,
693 .release = single_release,
694 .owner = THIS_MODULE,
695 };
696
697 static struct file_operations acpi_battery_state_fops = {
698 .open = acpi_battery_state_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_alarm_fops = {
706 .open = acpi_battery_alarm_open_fs,
707 .read = seq_read,
708 .write = acpi_battery_write_alarm,
709 .llseek = seq_lseek,
710 .release = single_release,
711 .owner = THIS_MODULE,
712 };
713
714 /* Legacy AC Adapter Interface */
715
716 static struct proc_dir_entry *acpi_ac_dir = NULL;
717
718 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
719 {
720
721 struct acpi_sbs *sbs = seq->private;
722
723 mutex_lock(&sbs->lock);
724
725 seq_printf(seq, "state: %s\n",
726 sbs->charger_present ? "on-line" : "off-line");
727
728 mutex_unlock(&sbs->lock);
729 return 0;
730 }
731
732 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
733 {
734 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
735 }
736
737 static struct file_operations acpi_ac_state_fops = {
738 .open = acpi_ac_state_open_fs,
739 .read = seq_read,
740 .llseek = seq_lseek,
741 .release = single_release,
742 .owner = THIS_MODULE,
743 };
744
745 #endif
746
747 /* --------------------------------------------------------------------------
748 Driver Interface
749 -------------------------------------------------------------------------- */
750 static int acpi_battery_read(struct acpi_battery *battery)
751 {
752 int result = 0, saved_present = battery->present;
753 u16 state;
754
755 if (battery->sbs->manager_present) {
756 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
757 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
758 if (!result)
759 battery->present = state & (1 << battery->id);
760 state &= 0x0fff;
761 state |= 1 << (battery->id + 12);
762 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
763 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
764 } else if (battery->id == 0)
765 battery->present = 1;
766 if (result || !battery->present)
767 return result;
768
769 if (saved_present != battery->present) {
770 battery->update_time = 0;
771 result = acpi_battery_get_info(battery);
772 if (result)
773 return result;
774 }
775 result = acpi_battery_get_state(battery);
776 return result;
777 }
778
779 /* Smart Battery */
780 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
781 {
782 struct acpi_battery *battery = &sbs->battery[id];
783 int result;
784
785 battery->id = id;
786 battery->sbs = sbs;
787 result = acpi_battery_read(battery);
788 if (result)
789 return result;
790
791 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
792 #ifdef CONFIG_ACPI_PROCFS_POWER
793 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
794 battery->name, &acpi_battery_info_fops,
795 &acpi_battery_state_fops, &acpi_battery_alarm_fops,
796 battery);
797 #endif
798 battery->bat.name = battery->name;
799 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
800 if (!acpi_battery_mode(battery)) {
801 battery->bat.properties = sbs_charge_battery_props;
802 battery->bat.num_properties =
803 ARRAY_SIZE(sbs_charge_battery_props);
804 } else {
805 battery->bat.properties = sbs_energy_battery_props;
806 battery->bat.num_properties =
807 ARRAY_SIZE(sbs_energy_battery_props);
808 }
809 battery->bat.get_property = acpi_sbs_battery_get_property;
810 result = power_supply_register(&sbs->device->dev, &battery->bat);
811 device_create_file(battery->bat.dev, &alarm_attr);
812 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
813 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
814 battery->name, sbs->battery->present ? "present" : "absent");
815 return result;
816 }
817
818 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
819 {
820 if (sbs->battery[id].bat.dev)
821 device_remove_file(sbs->battery[id].bat.dev, &alarm_attr);
822 power_supply_unregister(&sbs->battery[id].bat);
823 #ifdef CONFIG_ACPI_PROCFS_POWER
824 if (sbs->battery[id].proc_entry) {
825 acpi_sbs_remove_fs(&(sbs->battery[id].proc_entry),
826 acpi_battery_dir);
827 }
828 #endif
829 }
830
831 static int acpi_charger_add(struct acpi_sbs *sbs)
832 {
833 int result;
834
835 result = acpi_ac_get_present(sbs);
836 if (result)
837 goto end;
838 #ifdef CONFIG_ACPI_PROCFS_POWER
839 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
840 ACPI_AC_DIR_NAME, NULL,
841 &acpi_ac_state_fops, NULL, sbs);
842 if (result)
843 goto end;
844 #endif
845 sbs->charger.name = "sbs-charger";
846 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
847 sbs->charger.properties = sbs_ac_props;
848 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
849 sbs->charger.get_property = sbs_get_ac_property;
850 power_supply_register(&sbs->device->dev, &sbs->charger);
851 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
852 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
853 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
854 end:
855 return result;
856 }
857
858 static void acpi_charger_remove(struct acpi_sbs *sbs)
859 {
860 if (sbs->charger.dev)
861 power_supply_unregister(&sbs->charger);
862 #ifdef CONFIG_ACPI_PROCFS_POWER
863 if (sbs->charger_entry)
864 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
865 #endif
866 }
867
868 void acpi_sbs_callback(void *context)
869 {
870 int id;
871 struct acpi_sbs *sbs = context;
872 struct acpi_battery *bat;
873 u8 saved_charger_state = sbs->charger_present;
874 u8 saved_battery_state;
875 acpi_ac_get_present(sbs);
876 if (sbs->charger_present != saved_charger_state) {
877 #ifdef CONFIG_ACPI_PROC_EVENT
878 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
879 ACPI_SBS_NOTIFY_STATUS,
880 sbs->charger_present);
881 #endif
882 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
883 }
884 if (sbs->manager_present) {
885 for (id = 0; id < MAX_SBS_BAT; ++id) {
886 if (!(sbs->batteries_supported & (1 << id)))
887 continue;
888 bat = &sbs->battery[id];
889 saved_battery_state = bat->present;
890 acpi_battery_read(bat);
891 if (saved_battery_state == bat->present)
892 continue;
893 #ifdef CONFIG_ACPI_PROC_EVENT
894 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
895 bat->name,
896 ACPI_SBS_NOTIFY_STATUS,
897 bat->present);
898 #endif
899 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
900 }
901 }
902 }
903
904 static int acpi_sbs_remove(struct acpi_device *device, int type);
905
906 static int acpi_sbs_add(struct acpi_device *device)
907 {
908 struct acpi_sbs *sbs;
909 int result = 0;
910 int id;
911
912 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
913 if (!sbs) {
914 result = -ENOMEM;
915 goto end;
916 }
917
918 mutex_init(&sbs->lock);
919
920 sbs->hc = acpi_driver_data(device->parent);
921 sbs->device = device;
922 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
923 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
924 acpi_driver_data(device) = sbs;
925
926 result = acpi_charger_add(sbs);
927 if (result)
928 goto end;
929
930 result = acpi_manager_get_info(sbs);
931 if (!result) {
932 sbs->manager_present = 1;
933 for (id = 0; id < MAX_SBS_BAT; ++id)
934 if ((sbs->batteries_supported & (1 << id)))
935 acpi_battery_add(sbs, id);
936 } else
937 acpi_battery_add(sbs, 0);
938 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
939 end:
940 if (result)
941 acpi_sbs_remove(device, 0);
942 return result;
943 }
944
945 static int acpi_sbs_remove(struct acpi_device *device, int type)
946 {
947 struct acpi_sbs *sbs;
948 int id;
949
950 if (!device)
951 return -EINVAL;
952 sbs = acpi_driver_data(device);
953 if (!sbs)
954 return -EINVAL;
955 mutex_lock(&sbs->lock);
956 acpi_smbus_unregister_callback(sbs->hc);
957 for (id = 0; id < MAX_SBS_BAT; ++id)
958 acpi_battery_remove(sbs, id);
959 acpi_charger_remove(sbs);
960 mutex_unlock(&sbs->lock);
961 mutex_destroy(&sbs->lock);
962 kfree(sbs);
963 return 0;
964 }
965
966 static void acpi_sbs_rmdirs(void)
967 {
968 #ifdef CONFIG_ACPI_PROCFS_POWER
969 if (acpi_ac_dir) {
970 acpi_unlock_ac_dir(acpi_ac_dir);
971 acpi_ac_dir = NULL;
972 }
973 if (acpi_battery_dir) {
974 acpi_unlock_battery_dir(acpi_battery_dir);
975 acpi_battery_dir = NULL;
976 }
977 #endif
978 }
979
980 static int acpi_sbs_resume(struct acpi_device *device)
981 {
982 struct acpi_sbs *sbs;
983 if (!device)
984 return -EINVAL;
985 sbs = device->driver_data;
986 acpi_sbs_callback(sbs);
987 return 0;
988 }
989
990 static struct acpi_driver acpi_sbs_driver = {
991 .name = "sbs",
992 .class = ACPI_SBS_CLASS,
993 .ids = sbs_device_ids,
994 .ops = {
995 .add = acpi_sbs_add,
996 .remove = acpi_sbs_remove,
997 .resume = acpi_sbs_resume,
998 },
999 };
1000
1001 static int __init acpi_sbs_init(void)
1002 {
1003 int result = 0;
1004
1005 if (acpi_disabled)
1006 return -ENODEV;
1007 #ifdef CONFIG_ACPI_PROCFS_POWER
1008 acpi_ac_dir = acpi_lock_ac_dir();
1009 if (!acpi_ac_dir)
1010 return -ENODEV;
1011 acpi_battery_dir = acpi_lock_battery_dir();
1012 if (!acpi_battery_dir) {
1013 acpi_sbs_rmdirs();
1014 return -ENODEV;
1015 }
1016 #endif
1017 result = acpi_bus_register_driver(&acpi_sbs_driver);
1018 if (result < 0) {
1019 acpi_sbs_rmdirs();
1020 return -ENODEV;
1021 }
1022 return 0;
1023 }
1024
1025 static void __exit acpi_sbs_exit(void)
1026 {
1027 acpi_bus_unregister_driver(&acpi_sbs_driver);
1028 acpi_sbs_rmdirs();
1029 return;
1030 }
1031
1032 module_init(acpi_sbs_init);
1033 module_exit(acpi_sbs_exit);
Support for the Chinese Samsung S3C2440 based development boards