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code style scripts/checkpatch.pl formatting round #4 (2.6.34.14)
[linux-2.6.34.14-moxart.git] / drivers / acpi / sbs.c
blob4ff76e8174ebf716db53b1d5f2d3bbecd82ad332
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/slab.h>
29 #include <linux/module.h>
30 #include <linux/moduleparam.h>
31 #include <linux/kernel.h>
32
33 #ifdef CONFIG_ACPI_PROCFS_POWER
34 #include <linux/proc_fs.h>
35 #include <linux/seq_file.h>
36 #include <asm/uaccess.h>
37 #endif
38
39 #include <linux/acpi.h>
40 #include <linux/timer.h>
41 #include <linux/jiffies.h>
42 #include <linux/delay.h>
43
44 #ifdef CONFIG_ACPI_SYSFS_POWER
45 #include <linux/power_supply.h>
46 #endif
47
48 #include "sbshc.h"
49
50 #define PREFIX "ACPI: "
51
52 #define ACPI_SBS_CLASS "sbs"
53 #define ACPI_AC_CLASS "ac_adapter"
54 #define ACPI_BATTERY_CLASS "battery"
55 #define ACPI_SBS_DEVICE_NAME "Smart Battery System"
56 #define ACPI_SBS_FILE_INFO "info"
57 #define ACPI_SBS_FILE_STATE "state"
58 #define ACPI_SBS_FILE_ALARM "alarm"
59 #define ACPI_BATTERY_DIR_NAME "BAT%i"
60 #define ACPI_AC_DIR_NAME "AC0"
61
62 #define ACPI_SBS_NOTIFY_STATUS 0x80
63 #define ACPI_SBS_NOTIFY_INFO 0x81
64
65 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
66 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
67 MODULE_LICENSE("GPL");
68
69 static unsigned int cache_time = 1000;
70 module_param(cache_time, uint, 0644);
71 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
72
73 extern struct proc_dir_entry *acpi_lock_ac_dir(void);
74 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
75 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
76 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
77
78 #define MAX_SBS_BAT 4
79 #define ACPI_SBS_BLOCK_MAX 32
80
81 static const struct acpi_device_id sbs_device_ids[] = {
82 {"ACPI0002", 0},
83 {"", 0},
84 };
85 MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
86
87 struct acpi_battery {
88 #ifdef CONFIG_ACPI_SYSFS_POWER
89 struct power_supply bat;
90 #endif
91 struct acpi_sbs *sbs;
92 #ifdef CONFIG_ACPI_PROCFS_POWER
93 struct proc_dir_entry *proc_entry;
94 #endif
95 unsigned long update_time;
96 char name[8];
97 char manufacturer_name[ACPI_SBS_BLOCK_MAX];
98 char device_name[ACPI_SBS_BLOCK_MAX];
99 char device_chemistry[ACPI_SBS_BLOCK_MAX];
100 u16 alarm_capacity;
101 u16 full_charge_capacity;
102 u16 design_capacity;
103 u16 design_voltage;
104 u16 serial_number;
105 u16 cycle_count;
106 u16 temp_now;
107 u16 voltage_now;
108 s16 rate_now;
109 s16 rate_avg;
110 u16 capacity_now;
111 u16 state_of_charge;
112 u16 state;
113 u16 mode;
114 u16 spec;
115 u8 id;
116 u8 present:1;
117 u8 have_sysfs_alarm:1;
118 };
119
120 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
121
122 struct acpi_sbs {
123 #ifdef CONFIG_ACPI_SYSFS_POWER
124 struct power_supply charger;
125 #endif
126 struct acpi_device *device;
127 struct acpi_smb_hc *hc;
128 struct mutex lock;
129 #ifdef CONFIG_ACPI_PROCFS_POWER
130 struct proc_dir_entry *charger_entry;
131 #endif
132 struct acpi_battery battery[MAX_SBS_BAT];
133 u8 batteries_supported:4;
134 u8 manager_present:1;
135 u8 charger_present:1;
136 };
137
138 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
139
140 static inline int battery_scale(int log)
141 {
142 int scale = 1;
143 while (log--)
144 scale *= 10;
145 return scale;
146 }
147
148 static inline int acpi_battery_vscale(struct acpi_battery *battery)
149 {
150 return battery_scale((battery->spec & 0x0f00) >> 8);
151 }
152
153 static inline int acpi_battery_ipscale(struct acpi_battery *battery)
154 {
155 return battery_scale((battery->spec & 0xf000) >> 12);
156 }
157
158 static inline int acpi_battery_mode(struct acpi_battery *battery)
159 {
160 return (battery->mode & 0x8000);
161 }
162
163 static inline int acpi_battery_scale(struct acpi_battery *battery)
164 {
165 return (acpi_battery_mode(battery) ? 10 : 1) *
166 acpi_battery_ipscale(battery);
167 }
168
169 #ifdef CONFIG_ACPI_SYSFS_POWER
170 static int sbs_get_ac_property(struct power_supply *psy,
171 enum power_supply_property psp,
172 union power_supply_propval *val)
173 {
174 struct acpi_sbs *sbs = to_acpi_sbs(psy);
175 switch (psp) {
176 case POWER_SUPPLY_PROP_ONLINE:
177 val->intval = sbs->charger_present;
178 break;
179 default:
180 return -EINVAL;
181 }
182 return 0;
183 }
184
185 static int acpi_battery_technology(struct acpi_battery *battery)
186 {
187 if (!strcasecmp("NiCd", battery->device_chemistry))
188 return POWER_SUPPLY_TECHNOLOGY_NiCd;
189 if (!strcasecmp("NiMH", battery->device_chemistry))
190 return POWER_SUPPLY_TECHNOLOGY_NiMH;
191 if (!strcasecmp("LION", battery->device_chemistry))
192 return POWER_SUPPLY_TECHNOLOGY_LION;
193 if (!strcasecmp("LiP", battery->device_chemistry))
194 return POWER_SUPPLY_TECHNOLOGY_LIPO;
195 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
196 }
197
198 static int acpi_sbs_battery_get_property(struct power_supply *psy,
199 enum power_supply_property psp,
200 union power_supply_propval *val)
201 {
202 struct acpi_battery *battery = to_acpi_battery(psy);
203
204 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
205 return -ENODEV;
206 switch (psp) {
207 case POWER_SUPPLY_PROP_STATUS:
208 if (battery->rate_now < 0)
209 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
210 else if (battery->rate_now > 0)
211 val->intval = POWER_SUPPLY_STATUS_CHARGING;
212 else
213 val->intval = POWER_SUPPLY_STATUS_FULL;
214 break;
215 case POWER_SUPPLY_PROP_PRESENT:
216 val->intval = battery->present;
217 break;
218 case POWER_SUPPLY_PROP_TECHNOLOGY:
219 val->intval = acpi_battery_technology(battery);
220 break;
221 case POWER_SUPPLY_PROP_CYCLE_COUNT:
222 val->intval = battery->cycle_count;
223 break;
224 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
225 val->intval = battery->design_voltage *
226 acpi_battery_vscale(battery) * 1000;
227 break;
228 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
229 val->intval = battery->voltage_now *
230 acpi_battery_vscale(battery) * 1000;
231 break;
232 case POWER_SUPPLY_PROP_CURRENT_NOW:
233 case POWER_SUPPLY_PROP_POWER_NOW:
234 val->intval = abs(battery->rate_now) *
235 acpi_battery_ipscale(battery) * 1000;
236 break;
237 case POWER_SUPPLY_PROP_CURRENT_AVG:
238 case POWER_SUPPLY_PROP_POWER_AVG:
239 val->intval = abs(battery->rate_avg) *
240 acpi_battery_ipscale(battery) * 1000;
241 break;
242 case POWER_SUPPLY_PROP_CAPACITY:
243 val->intval = battery->state_of_charge;
244 break;
245 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
246 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
247 val->intval = battery->design_capacity *
248 acpi_battery_scale(battery) * 1000;
249 break;
250 case POWER_SUPPLY_PROP_CHARGE_FULL:
251 case POWER_SUPPLY_PROP_ENERGY_FULL:
252 val->intval = battery->full_charge_capacity *
253 acpi_battery_scale(battery) * 1000;
254 break;
255 case POWER_SUPPLY_PROP_CHARGE_NOW:
256 case POWER_SUPPLY_PROP_ENERGY_NOW:
257 val->intval = battery->capacity_now *
258 acpi_battery_scale(battery) * 1000;
259 break;
260 case POWER_SUPPLY_PROP_TEMP:
261 val->intval = battery->temp_now - 2730; // dK -> dC
262 break;
263 case POWER_SUPPLY_PROP_MODEL_NAME:
264 val->strval = battery->device_name;
265 break;
266 case POWER_SUPPLY_PROP_MANUFACTURER:
267 val->strval = battery->manufacturer_name;
268 break;
269 default:
270 return -EINVAL;
271 }
272 return 0;
273 }
274
275 static enum power_supply_property sbs_ac_props[] = {
276 POWER_SUPPLY_PROP_ONLINE,
277 };
278
279 static enum power_supply_property sbs_charge_battery_props[] = {
280 POWER_SUPPLY_PROP_STATUS,
281 POWER_SUPPLY_PROP_PRESENT,
282 POWER_SUPPLY_PROP_TECHNOLOGY,
283 POWER_SUPPLY_PROP_CYCLE_COUNT,
284 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
285 POWER_SUPPLY_PROP_VOLTAGE_NOW,
286 POWER_SUPPLY_PROP_CURRENT_NOW,
287 POWER_SUPPLY_PROP_CURRENT_AVG,
288 POWER_SUPPLY_PROP_CAPACITY,
289 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
290 POWER_SUPPLY_PROP_CHARGE_FULL,
291 POWER_SUPPLY_PROP_CHARGE_NOW,
292 POWER_SUPPLY_PROP_TEMP,
293 POWER_SUPPLY_PROP_MODEL_NAME,
294 POWER_SUPPLY_PROP_MANUFACTURER,
295 };
296
297 static enum power_supply_property sbs_energy_battery_props[] = {
298 POWER_SUPPLY_PROP_STATUS,
299 POWER_SUPPLY_PROP_PRESENT,
300 POWER_SUPPLY_PROP_TECHNOLOGY,
301 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
302 POWER_SUPPLY_PROP_VOLTAGE_NOW,
303 POWER_SUPPLY_PROP_CURRENT_NOW,
304 POWER_SUPPLY_PROP_CURRENT_AVG,
305 POWER_SUPPLY_PROP_POWER_NOW,
306 POWER_SUPPLY_PROP_POWER_AVG,
307 POWER_SUPPLY_PROP_CAPACITY,
308 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
309 POWER_SUPPLY_PROP_ENERGY_FULL,
310 POWER_SUPPLY_PROP_ENERGY_NOW,
311 POWER_SUPPLY_PROP_TEMP,
312 POWER_SUPPLY_PROP_MODEL_NAME,
313 POWER_SUPPLY_PROP_MANUFACTURER,
314 };
315
316 #endif
317
318 /* --------------------------------------------------------------------------
319 Smart Battery System Management
320 -------------------------------------------------------------------------- */
321
322 struct acpi_battery_reader {
323 u8 command; /* command for battery */
324 u8 mode; /* word or block? */
325 size_t offset; /* offset inside struct acpi_sbs_battery */
326 };
327
328 static struct acpi_battery_reader info_readers[] = {
329 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
330 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
331 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
332 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
333 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
334 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
335 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
336 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
337 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
338 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
339 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
340 };
341
342 static struct acpi_battery_reader state_readers[] = {
343 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
344 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
345 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
346 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
347 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
348 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
349 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
350 };
351
352 static int acpi_manager_get_info(struct acpi_sbs *sbs)
353 {
354 int result = 0;
355 u16 battery_system_info;
356
357 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
358 0x04, (u8 *)&battery_system_info);
359 if (!result)
360 sbs->batteries_supported = battery_system_info & 0x000f;
361 return result;
362 }
363
364 static int acpi_battery_get_info(struct acpi_battery *battery)
365 {
366 int i, result = 0;
367
368 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
369 result = acpi_smbus_read(battery->sbs->hc,
370 info_readers[i].mode,
371 ACPI_SBS_BATTERY,
372 info_readers[i].command,
373 (u8 *) battery +
374 info_readers[i].offset);
375 if (result)
376 break;
377 }
378 return result;
379 }
380
381 static int acpi_battery_get_state(struct acpi_battery *battery)
382 {
383 int i, result = 0;
384
385 if (battery->update_time &&
386 time_before(jiffies, battery->update_time +
387 msecs_to_jiffies(cache_time)))
388 return 0;
389 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
390 result = acpi_smbus_read(battery->sbs->hc,
391 state_readers[i].mode,
392 ACPI_SBS_BATTERY,
393 state_readers[i].command,
394 (u8 *)battery +
395 state_readers[i].offset);
396 if (result)
397 goto end;
398 }
399 end:
400 battery->update_time = jiffies;
401 return result;
402 }
403
404 static int acpi_battery_get_alarm(struct acpi_battery *battery)
405 {
406 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
407 ACPI_SBS_BATTERY, 0x01,
408 (u8 *)&battery->alarm_capacity);
409 }
410
411 static int acpi_battery_set_alarm(struct acpi_battery *battery)
412 {
413 struct acpi_sbs *sbs = battery->sbs;
414 u16 value, sel = 1 << (battery->id + 12);
415
416 int ret;
417
418
419 if (sbs->manager_present) {
420 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
421 0x01, (u8 *)&value);
422 if (ret)
423 goto end;
424 if ((value & 0xf000) != sel) {
425 value &= 0x0fff;
426 value |= sel;
427 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
428 ACPI_SBS_MANAGER,
429 0x01, (u8 *)&value, 2);
430 if (ret)
431 goto end;
432 }
433 }
434 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
435 0x01, (u8 *)&battery->alarm_capacity, 2);
436 end:
437 return ret;
438 }
439
440 static int acpi_ac_get_present(struct acpi_sbs *sbs)
441 {
442 int result;
443 u16 status;
444
445 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
446 0x13, (u8 *) & status);
447 if (!result)
448 sbs->charger_present = (status >> 15) & 0x1;
449 return result;
450 }
451
452 #ifdef CONFIG_ACPI_SYSFS_POWER
453 static ssize_t acpi_battery_alarm_show(struct device *dev,
454 struct device_attribute *attr,
455 char *buf)
456 {
457 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
458 acpi_battery_get_alarm(battery);
459 return sprintf(buf, "%d\n", battery->alarm_capacity *
460 acpi_battery_scale(battery) * 1000);
461 }
462
463 static ssize_t acpi_battery_alarm_store(struct device *dev,
464 struct device_attribute *attr,
465 const char *buf, size_t count)
466 {
467 unsigned long x;
468 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
469 if (sscanf(buf, "%ld\n", &x) == 1)
470 battery->alarm_capacity = x /
471 (1000 * acpi_battery_scale(battery));
472 if (battery->present)
473 acpi_battery_set_alarm(battery);
474 return count;
475 }
476
477 static struct device_attribute alarm_attr = {
478 .attr = {.name = "alarm", .mode = 0644},
479 .show = acpi_battery_alarm_show,
480 .store = acpi_battery_alarm_store,
481 };
482 #endif
483
484 /* --------------------------------------------------------------------------
485 FS Interface (/proc/acpi)
486 -------------------------------------------------------------------------- */
487
488 #ifdef CONFIG_ACPI_PROCFS_POWER
489 /* Generic Routines */
490 static int
491 acpi_sbs_add_fs(struct proc_dir_entry **dir,
492 struct proc_dir_entry *parent_dir,
493 char *dir_name,
494 const struct file_operations *info_fops,
495 const struct file_operations *state_fops,
496 const struct file_operations *alarm_fops, void *data)
497 {
498 if (!*dir) {
499 *dir = proc_mkdir(dir_name, parent_dir);
500 if (!*dir) {
501 return -ENODEV;
502 }
503 }
504
505 /* 'info' [R] */
506 if (info_fops)
507 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
508 info_fops, data);
509
510 /* 'state' [R] */
511 if (state_fops)
512 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
513 state_fops, data);
514
515 /* 'alarm' [R/W] */
516 if (alarm_fops)
517 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
518 alarm_fops, data);
519 return 0;
520 }
521
522 static void
523 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
524 struct proc_dir_entry *parent_dir)
525 {
526 if (*dir) {
527 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
528 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
529 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
530 remove_proc_entry((*dir)->name, parent_dir);
531 *dir = NULL;
532 }
533 }
534
535 /* Smart Battery Interface */
536 static struct proc_dir_entry *acpi_battery_dir = NULL;
537
538 static inline char *acpi_battery_units(struct acpi_battery *battery)
539 {
540 return acpi_battery_mode(battery) ? " mW" : " mA";
541 }
542
543
544 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
545 {
546 struct acpi_battery *battery = seq->private;
547 struct acpi_sbs *sbs = battery->sbs;
548 int result = 0;
549
550 mutex_lock(&sbs->lock);
551
552 seq_printf(seq, "present: %s\n",
553 (battery->present) ? "yes" : "no");
554 if (!battery->present)
555 goto end;
556
557 seq_printf(seq, "design capacity: %i%sh\n",
558 battery->design_capacity * acpi_battery_scale(battery),
559 acpi_battery_units(battery));
560 seq_printf(seq, "last full capacity: %i%sh\n",
561 battery->full_charge_capacity * acpi_battery_scale(battery),
562 acpi_battery_units(battery));
563 seq_printf(seq, "battery technology: rechargeable\n");
564 seq_printf(seq, "design voltage: %i mV\n",
565 battery->design_voltage * acpi_battery_vscale(battery));
566 seq_printf(seq, "design capacity warning: unknown\n");
567 seq_printf(seq, "design capacity low: unknown\n");
568 seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
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 rate;
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->rate_now < 0) ? "discharging" :
605 ((battery->rate_now > 0) ? "charging" : "charged"));
606 rate = abs(battery->rate_now) * acpi_battery_ipscale(battery);
607 rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
608 acpi_battery_vscale(battery)/1000):1;
609 seq_printf(seq, "present rate: %d%s\n", rate,
610 acpi_battery_units(battery));
611 seq_printf(seq, "remaining capacity: %i%sh\n",
612 battery->capacity_now * acpi_battery_scale(battery),
613 acpi_battery_units(battery));
614 seq_printf(seq, "present voltage: %i mV\n",
615 battery->voltage_now * acpi_battery_vscale(battery));
616
617 end:
618 mutex_unlock(&sbs->lock);
619 return 0;
620 }
621
622 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
623 {
624 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
625 }
626
627 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
628 {
629 struct acpi_battery *battery = seq->private;
630 struct acpi_sbs *sbs = battery->sbs;
631 int result = 0;
632
633 mutex_lock(&sbs->lock);
634
635 if (!battery->present) {
636 seq_printf(seq, "present: no\n");
637 goto end;
638 }
639
640 acpi_battery_get_alarm(battery);
641 seq_printf(seq, "alarm: ");
642 if (battery->alarm_capacity)
643 seq_printf(seq, "%i%sh\n",
644 battery->alarm_capacity *
645 acpi_battery_scale(battery),
646 acpi_battery_units(battery));
647 else
648 seq_printf(seq, "disabled\n");
649 end:
650 mutex_unlock(&sbs->lock);
651 return result;
652 }
653
654 static ssize_t
655 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
656 size_t count, loff_t * ppos)
657 {
658 struct seq_file *seq = file->private_data;
659 struct acpi_battery *battery = seq->private;
660 struct acpi_sbs *sbs = battery->sbs;
661 char alarm_string[12] = { '\0' };
662 int result = 0;
663 mutex_lock(&sbs->lock);
664 if (!battery->present) {
665 result = -ENODEV;
666 goto end;
667 }
668 if (count > sizeof(alarm_string) - 1) {
669 result = -EINVAL;
670 goto end;
671 }
672 if (copy_from_user(alarm_string, buffer, count)) {
673 result = -EFAULT;
674 goto end;
675 }
676 alarm_string[count] = 0;
677 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
678 acpi_battery_scale(battery);
679 acpi_battery_set_alarm(battery);
680 end:
681 mutex_unlock(&sbs->lock);
682 if (result)
683 return result;
684 return count;
685 }
686
687 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
688 {
689 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
690 }
691
692 static const struct file_operations acpi_battery_info_fops = {
693 .open = acpi_battery_info_open_fs,
694 .read = seq_read,
695 .llseek = seq_lseek,
696 .release = single_release,
697 .owner = THIS_MODULE,
698 };
699
700 static const struct file_operations acpi_battery_state_fops = {
701 .open = acpi_battery_state_open_fs,
702 .read = seq_read,
703 .llseek = seq_lseek,
704 .release = single_release,
705 .owner = THIS_MODULE,
706 };
707
708 static const struct file_operations acpi_battery_alarm_fops = {
709 .open = acpi_battery_alarm_open_fs,
710 .read = seq_read,
711 .write = acpi_battery_write_alarm,
712 .llseek = seq_lseek,
713 .release = single_release,
714 .owner = THIS_MODULE,
715 };
716
717 /* Legacy AC Adapter Interface */
718
719 static struct proc_dir_entry *acpi_ac_dir = NULL;
720
721 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
722 {
723
724 struct acpi_sbs *sbs = seq->private;
725
726 mutex_lock(&sbs->lock);
727
728 seq_printf(seq, "state: %s\n",
729 sbs->charger_present ? "on-line" : "off-line");
730
731 mutex_unlock(&sbs->lock);
732 return 0;
733 }
734
735 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
736 {
737 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
738 }
739
740 static const struct file_operations acpi_ac_state_fops = {
741 .open = acpi_ac_state_open_fs,
742 .read = seq_read,
743 .llseek = seq_lseek,
744 .release = single_release,
745 .owner = THIS_MODULE,
746 };
747
748 #endif
749
750 /* --------------------------------------------------------------------------
751 Driver Interface
752 -------------------------------------------------------------------------- */
753 static int acpi_battery_read(struct acpi_battery *battery)
754 {
755 int result = 0, saved_present = battery->present;
756 u16 state;
757
758 if (battery->sbs->manager_present) {
759 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
760 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
761 if (!result)
762 battery->present = state & (1 << battery->id);
763 state &= 0x0fff;
764 state |= 1 << (battery->id + 12);
765 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
766 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
767 } else if (battery->id == 0)
768 battery->present = 1;
769 if (result || !battery->present)
770 return result;
771
772 if (saved_present != battery->present) {
773 battery->update_time = 0;
774 result = acpi_battery_get_info(battery);
775 if (result)
776 return result;
777 }
778 result = acpi_battery_get_state(battery);
779 return result;
780 }
781
782 /* Smart Battery */
783 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
784 {
785 struct acpi_battery *battery = &sbs->battery[id];
786 int result;
787
788 battery->id = id;
789 battery->sbs = sbs;
790 result = acpi_battery_read(battery);
791 if (result)
792 return result;
793
794 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
795 #ifdef CONFIG_ACPI_PROCFS_POWER
796 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
797 battery->name, &acpi_battery_info_fops,
798 &acpi_battery_state_fops, &acpi_battery_alarm_fops,
799 battery);
800 #endif
801 #ifdef CONFIG_ACPI_SYSFS_POWER
802 battery->bat.name = battery->name;
803 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
804 if (!acpi_battery_mode(battery)) {
805 battery->bat.properties = sbs_charge_battery_props;
806 battery->bat.num_properties =
807 ARRAY_SIZE(sbs_charge_battery_props);
808 } else {
809 battery->bat.properties = sbs_energy_battery_props;
810 battery->bat.num_properties =
811 ARRAY_SIZE(sbs_energy_battery_props);
812 }
813 battery->bat.get_property = acpi_sbs_battery_get_property;
814 result = power_supply_register(&sbs->device->dev, &battery->bat);
815 if (result)
816 goto end;
817 result = device_create_file(battery->bat.dev, &alarm_attr);
818 if (result)
819 goto end;
820 battery->have_sysfs_alarm = 1;
821 end:
822 #endif
823 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
824 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
825 battery->name, battery->present ? "present" : "absent");
826 return result;
827 }
828
829 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
830 {
831 #if defined(CONFIG_ACPI_SYSFS_POWER) || defined(CONFIG_ACPI_PROCFS_POWER)
832 struct acpi_battery *battery = &sbs->battery[id];
833 #endif
834
835 #ifdef CONFIG_ACPI_SYSFS_POWER
836 if (battery->bat.dev) {
837 if (battery->have_sysfs_alarm)
838 device_remove_file(battery->bat.dev, &alarm_attr);
839 power_supply_unregister(&battery->bat);
840 }
841 #endif
842 #ifdef CONFIG_ACPI_PROCFS_POWER
843 if (battery->proc_entry)
844 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
845 #endif
846 }
847
848 static int acpi_charger_add(struct acpi_sbs *sbs)
849 {
850 int result;
851
852 result = acpi_ac_get_present(sbs);
853 if (result)
854 goto end;
855 #ifdef CONFIG_ACPI_PROCFS_POWER
856 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
857 ACPI_AC_DIR_NAME, NULL,
858 &acpi_ac_state_fops, NULL, sbs);
859 if (result)
860 goto end;
861 #endif
862 #ifdef CONFIG_ACPI_SYSFS_POWER
863 sbs->charger.name = "sbs-charger";
864 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
865 sbs->charger.properties = sbs_ac_props;
866 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
867 sbs->charger.get_property = sbs_get_ac_property;
868 power_supply_register(&sbs->device->dev, &sbs->charger);
869 #endif
870 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
871 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
872 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
873 end:
874 return result;
875 }
876
877 static void acpi_charger_remove(struct acpi_sbs *sbs)
878 {
879 #ifdef CONFIG_ACPI_SYSFS_POWER
880 if (sbs->charger.dev)
881 power_supply_unregister(&sbs->charger);
882 #endif
883 #ifdef CONFIG_ACPI_PROCFS_POWER
884 if (sbs->charger_entry)
885 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
886 #endif
887 }
888
889 static void acpi_sbs_callback(void *context)
890 {
891 int id;
892 struct acpi_sbs *sbs = context;
893 struct acpi_battery *bat;
894 u8 saved_charger_state = sbs->charger_present;
895 u8 saved_battery_state;
896 acpi_ac_get_present(sbs);
897 if (sbs->charger_present != saved_charger_state) {
898 #ifdef CONFIG_ACPI_PROC_EVENT
899 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
900 ACPI_SBS_NOTIFY_STATUS,
901 sbs->charger_present);
902 #endif
903 #ifdef CONFIG_ACPI_SYSFS_POWER
904 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
905 #endif
906 }
907 if (sbs->manager_present) {
908 for (id = 0; id < MAX_SBS_BAT; ++id) {
909 if (!(sbs->batteries_supported & (1 << id)))
910 continue;
911 bat = &sbs->battery[id];
912 saved_battery_state = bat->present;
913 acpi_battery_read(bat);
914 if (saved_battery_state == bat->present)
915 continue;
916 #ifdef CONFIG_ACPI_PROC_EVENT
917 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
918 bat->name,
919 ACPI_SBS_NOTIFY_STATUS,
920 bat->present);
921 #endif
922 #ifdef CONFIG_ACPI_SYSFS_POWER
923 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
924 #endif
925 }
926 }
927 }
928
929 static int acpi_sbs_remove(struct acpi_device *device, int type);
930
931 static int acpi_sbs_add(struct acpi_device *device)
932 {
933 struct acpi_sbs *sbs;
934 int result = 0;
935 int id;
936
937 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
938 if (!sbs) {
939 result = -ENOMEM;
940 goto end;
941 }
942
943 mutex_init(&sbs->lock);
944
945 sbs->hc = acpi_driver_data(device->parent);
946 sbs->device = device;
947 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
948 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
949 device->driver_data = sbs;
950
951 result = acpi_charger_add(sbs);
952 if (result)
953 goto end;
954
955 result = acpi_manager_get_info(sbs);
956 if (!result) {
957 sbs->manager_present = 1;
958 for (id = 0; id < MAX_SBS_BAT; ++id)
959 if ((sbs->batteries_supported & (1 << id)))
960 acpi_battery_add(sbs, id);
961 } else
962 acpi_battery_add(sbs, 0);
963 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
964 end:
965 if (result)
966 acpi_sbs_remove(device, 0);
967 return result;
968 }
969
970 static int acpi_sbs_remove(struct acpi_device *device, int type)
971 {
972 struct acpi_sbs *sbs;
973 int id;
974
975 if (!device)
976 return -EINVAL;
977 sbs = acpi_driver_data(device);
978 if (!sbs)
979 return -EINVAL;
980 mutex_lock(&sbs->lock);
981 acpi_smbus_unregister_callback(sbs->hc);
982 for (id = 0; id < MAX_SBS_BAT; ++id)
983 acpi_battery_remove(sbs, id);
984 acpi_charger_remove(sbs);
985 mutex_unlock(&sbs->lock);
986 mutex_destroy(&sbs->lock);
987 kfree(sbs);
988 return 0;
989 }
990
991 static void acpi_sbs_rmdirs(void)
992 {
993 #ifdef CONFIG_ACPI_PROCFS_POWER
994 if (acpi_ac_dir) {
995 acpi_unlock_ac_dir(acpi_ac_dir);
996 acpi_ac_dir = NULL;
997 }
998 if (acpi_battery_dir) {
999 acpi_unlock_battery_dir(acpi_battery_dir);
1000 acpi_battery_dir = NULL;
1001 }
1002 #endif
1003 }
1004
1005 static int acpi_sbs_resume(struct acpi_device *device)
1006 {
1007 struct acpi_sbs *sbs;
1008 if (!device)
1009 return -EINVAL;
1010 sbs = device->driver_data;
1011 acpi_sbs_callback(sbs);
1012 return 0;
1013 }
1014
1015 static struct acpi_driver acpi_sbs_driver = {
1016 .name = "sbs",
1017 .class = ACPI_SBS_CLASS,
1018 .ids = sbs_device_ids,
1019 .ops = {
1020 .add = acpi_sbs_add,
1021 .remove = acpi_sbs_remove,
1022 .resume = acpi_sbs_resume,
1023 },
1024 };
1025
1026 static int __init acpi_sbs_init(void)
1027 {
1028 int result = 0;
1029
1030 if (acpi_disabled)
1031 return -ENODEV;
1032 #ifdef CONFIG_ACPI_PROCFS_POWER
1033 acpi_ac_dir = acpi_lock_ac_dir();
1034 if (!acpi_ac_dir)
1035 return -ENODEV;
1036 acpi_battery_dir = acpi_lock_battery_dir();
1037 if (!acpi_battery_dir) {
1038 acpi_sbs_rmdirs();
1039 return -ENODEV;
1040 }
1041 #endif
1042 result = acpi_bus_register_driver(&acpi_sbs_driver);
1043 if (result < 0) {
1044 acpi_sbs_rmdirs();
1045 return -ENODEV;
1046 }
1047 return 0;
1048 }
1049
1050 static void __exit acpi_sbs_exit(void)
1051 {
1052 acpi_bus_unregister_driver(&acpi_sbs_driver);
1053 acpi_sbs_rmdirs();
1054 return;
1055 }
1056
1057 module_init(acpi_sbs_init);
1058 module_exit(acpi_sbs_exit);
Linux ARM platform port for MOXA ART SoC