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On Tue, Nov 06, 2007 at 02:33:53AM -0800, akpm@linux-foundation.org wrote:
[mmotm.git] / drivers / acpi / sbs.c
blob52b9db8afc20296ba11ec32ec7a10f5041f653dc
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_VOLTAGE_MIN_DESIGN:
221 val->intval = battery->design_voltage *
222 acpi_battery_vscale(battery) * 1000;
223 break;
224 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
225 val->intval = battery->voltage_now *
226 acpi_battery_vscale(battery) * 1000;
227 break;
228 case POWER_SUPPLY_PROP_CURRENT_NOW:
229 case POWER_SUPPLY_PROP_POWER_NOW:
230 val->intval = abs(battery->rate_now) *
231 acpi_battery_ipscale(battery) * 1000;
232 break;
233 case POWER_SUPPLY_PROP_CURRENT_AVG:
234 case POWER_SUPPLY_PROP_POWER_AVG:
235 val->intval = abs(battery->rate_avg) *
236 acpi_battery_ipscale(battery) * 1000;
237 break;
238 case POWER_SUPPLY_PROP_CAPACITY:
239 val->intval = battery->state_of_charge;
240 break;
241 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
242 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
243 val->intval = battery->design_capacity *
244 acpi_battery_scale(battery) * 1000;
245 break;
246 case POWER_SUPPLY_PROP_CHARGE_FULL:
247 case POWER_SUPPLY_PROP_ENERGY_FULL:
248 val->intval = battery->full_charge_capacity *
249 acpi_battery_scale(battery) * 1000;
250 break;
251 case POWER_SUPPLY_PROP_CHARGE_NOW:
252 case POWER_SUPPLY_PROP_ENERGY_NOW:
253 val->intval = battery->capacity_now *
254 acpi_battery_scale(battery) * 1000;
255 break;
256 case POWER_SUPPLY_PROP_TEMP:
257 val->intval = battery->temp_now - 2730; // dK -> dC
258 break;
259 case POWER_SUPPLY_PROP_MODEL_NAME:
260 val->strval = battery->device_name;
261 break;
262 case POWER_SUPPLY_PROP_MANUFACTURER:
263 val->strval = battery->manufacturer_name;
264 break;
265 default:
266 return -EINVAL;
267 }
268 return 0;
269 }
270
271 static enum power_supply_property sbs_ac_props[] = {
272 POWER_SUPPLY_PROP_ONLINE,
273 };
274
275 static enum power_supply_property sbs_charge_battery_props[] = {
276 POWER_SUPPLY_PROP_STATUS,
277 POWER_SUPPLY_PROP_PRESENT,
278 POWER_SUPPLY_PROP_TECHNOLOGY,
279 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
280 POWER_SUPPLY_PROP_VOLTAGE_NOW,
281 POWER_SUPPLY_PROP_CURRENT_NOW,
282 POWER_SUPPLY_PROP_CURRENT_AVG,
283 POWER_SUPPLY_PROP_CAPACITY,
284 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
285 POWER_SUPPLY_PROP_CHARGE_FULL,
286 POWER_SUPPLY_PROP_CHARGE_NOW,
287 POWER_SUPPLY_PROP_TEMP,
288 POWER_SUPPLY_PROP_MODEL_NAME,
289 POWER_SUPPLY_PROP_MANUFACTURER,
290 };
291
292 static enum power_supply_property sbs_energy_battery_props[] = {
293 POWER_SUPPLY_PROP_STATUS,
294 POWER_SUPPLY_PROP_PRESENT,
295 POWER_SUPPLY_PROP_TECHNOLOGY,
296 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
297 POWER_SUPPLY_PROP_VOLTAGE_NOW,
298 POWER_SUPPLY_PROP_CURRENT_NOW,
299 POWER_SUPPLY_PROP_CURRENT_AVG,
300 POWER_SUPPLY_PROP_POWER_NOW,
301 POWER_SUPPLY_PROP_POWER_AVG,
302 POWER_SUPPLY_PROP_CAPACITY,
303 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
304 POWER_SUPPLY_PROP_ENERGY_FULL,
305 POWER_SUPPLY_PROP_ENERGY_NOW,
306 POWER_SUPPLY_PROP_TEMP,
307 POWER_SUPPLY_PROP_MODEL_NAME,
308 POWER_SUPPLY_PROP_MANUFACTURER,
309 };
310
311 #endif
312
313 /* --------------------------------------------------------------------------
314 Smart Battery System Management
315 -------------------------------------------------------------------------- */
316
317 struct acpi_battery_reader {
318 u8 command; /* command for battery */
319 u8 mode; /* word or block? */
320 size_t offset; /* offset inside struct acpi_sbs_battery */
321 };
322
323 static struct acpi_battery_reader info_readers[] = {
324 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
325 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
326 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
327 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
328 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
329 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
330 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
331 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
332 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
333 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
334 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
335 };
336
337 static struct acpi_battery_reader state_readers[] = {
338 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
339 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
340 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
341 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
342 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
343 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
344 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
345 };
346
347 static int acpi_manager_get_info(struct acpi_sbs *sbs)
348 {
349 int result = 0;
350 u16 battery_system_info;
351
352 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
353 0x04, (u8 *)&battery_system_info);
354 if (!result)
355 sbs->batteries_supported = battery_system_info & 0x000f;
356 return result;
357 }
358
359 static int acpi_battery_get_info(struct acpi_battery *battery)
360 {
361 int i, result = 0;
362
363 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
364 result = acpi_smbus_read(battery->sbs->hc,
365 info_readers[i].mode,
366 ACPI_SBS_BATTERY,
367 info_readers[i].command,
368 (u8 *) battery +
369 info_readers[i].offset);
370 if (result)
371 break;
372 }
373 return result;
374 }
375
376 static int acpi_battery_get_state(struct acpi_battery *battery)
377 {
378 int i, result = 0;
379
380 if (battery->update_time &&
381 time_before(jiffies, battery->update_time +
382 msecs_to_jiffies(cache_time)))
383 return 0;
384 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
385 result = acpi_smbus_read(battery->sbs->hc,
386 state_readers[i].mode,
387 ACPI_SBS_BATTERY,
388 state_readers[i].command,
389 (u8 *)battery +
390 state_readers[i].offset);
391 if (result)
392 goto end;
393 }
394 end:
395 battery->update_time = jiffies;
396 return result;
397 }
398
399 static int acpi_battery_get_alarm(struct acpi_battery *battery)
400 {
401 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
402 ACPI_SBS_BATTERY, 0x01,
403 (u8 *)&battery->alarm_capacity);
404 }
405
406 static int acpi_battery_set_alarm(struct acpi_battery *battery)
407 {
408 struct acpi_sbs *sbs = battery->sbs;
409 u16 value, sel = 1 << (battery->id + 12);
410
411 int ret;
412
413
414 if (sbs->manager_present) {
415 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
416 0x01, (u8 *)&value);
417 if (ret)
418 goto end;
419 if ((value & 0xf000) != sel) {
420 value &= 0x0fff;
421 value |= sel;
422 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
423 ACPI_SBS_MANAGER,
424 0x01, (u8 *)&value, 2);
425 if (ret)
426 goto end;
427 }
428 }
429 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
430 0x01, (u8 *)&battery->alarm_capacity, 2);
431 end:
432 return ret;
433 }
434
435 static int acpi_ac_get_present(struct acpi_sbs *sbs)
436 {
437 int result;
438 u16 status;
439
440 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
441 0x13, (u8 *) & status);
442 if (!result)
443 sbs->charger_present = (status >> 15) & 0x1;
444 return result;
445 }
446
447 #ifdef CONFIG_ACPI_SYSFS_POWER
448 static ssize_t acpi_battery_alarm_show(struct device *dev,
449 struct device_attribute *attr,
450 char *buf)
451 {
452 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
453 acpi_battery_get_alarm(battery);
454 return sprintf(buf, "%d\n", battery->alarm_capacity *
455 acpi_battery_scale(battery) * 1000);
456 }
457
458 static ssize_t acpi_battery_alarm_store(struct device *dev,
459 struct device_attribute *attr,
460 const char *buf, size_t count)
461 {
462 unsigned long x;
463 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
464 if (sscanf(buf, "%ld\n", &x) == 1)
465 battery->alarm_capacity = x /
466 (1000 * acpi_battery_scale(battery));
467 if (battery->present)
468 acpi_battery_set_alarm(battery);
469 return count;
470 }
471
472 static struct device_attribute alarm_attr = {
473 .attr = {.name = "alarm", .mode = 0644},
474 .show = acpi_battery_alarm_show,
475 .store = acpi_battery_alarm_store,
476 };
477 #endif
478
479 /* --------------------------------------------------------------------------
480 FS Interface (/proc/acpi)
481 -------------------------------------------------------------------------- */
482
483 #ifdef CONFIG_ACPI_PROCFS_POWER
484 /* Generic Routines */
485 static int
486 acpi_sbs_add_fs(struct proc_dir_entry **dir,
487 struct proc_dir_entry *parent_dir,
488 char *dir_name,
489 const struct file_operations *info_fops,
490 const struct file_operations *state_fops,
491 const struct file_operations *alarm_fops, void *data)
492 {
493 if (!*dir) {
494 *dir = proc_mkdir(dir_name, parent_dir);
495 if (!*dir) {
496 return -ENODEV;
497 }
498 }
499
500 /* 'info' [R] */
501 if (info_fops)
502 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
503 info_fops, data);
504
505 /* 'state' [R] */
506 if (state_fops)
507 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
508 state_fops, data);
509
510 /* 'alarm' [R/W] */
511 if (alarm_fops)
512 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
513 alarm_fops, data);
514 return 0;
515 }
516
517 static void
518 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
519 struct proc_dir_entry *parent_dir)
520 {
521 if (*dir) {
522 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
523 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
524 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
525 remove_proc_entry((*dir)->name, parent_dir);
526 *dir = NULL;
527 }
528 }
529
530 /* Smart Battery Interface */
531 static struct proc_dir_entry *acpi_battery_dir = NULL;
532
533 static inline char *acpi_battery_units(struct acpi_battery *battery)
534 {
535 return acpi_battery_mode(battery) ? " mW" : " mA";
536 }
537
538
539 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
540 {
541 struct acpi_battery *battery = seq->private;
542 struct acpi_sbs *sbs = battery->sbs;
543 int result = 0;
544
545 mutex_lock(&sbs->lock);
546
547 seq_printf(seq, "present: %s\n",
548 (battery->present) ? "yes" : "no");
549 if (!battery->present)
550 goto end;
551
552 seq_printf(seq, "design capacity: %i%sh\n",
553 battery->design_capacity * acpi_battery_scale(battery),
554 acpi_battery_units(battery));
555 seq_printf(seq, "last full capacity: %i%sh\n",
556 battery->full_charge_capacity * acpi_battery_scale(battery),
557 acpi_battery_units(battery));
558 seq_printf(seq, "battery technology: rechargeable\n");
559 seq_printf(seq, "design voltage: %i mV\n",
560 battery->design_voltage * acpi_battery_vscale(battery));
561 seq_printf(seq, "design capacity warning: unknown\n");
562 seq_printf(seq, "design capacity low: unknown\n");
563 seq_printf(seq, "capacity granularity 1: unknown\n");
564 seq_printf(seq, "capacity granularity 2: unknown\n");
565 seq_printf(seq, "model number: %s\n", battery->device_name);
566 seq_printf(seq, "serial number: %i\n",
567 battery->serial_number);
568 seq_printf(seq, "battery type: %s\n",
569 battery->device_chemistry);
570 seq_printf(seq, "OEM info: %s\n",
571 battery->manufacturer_name);
572 end:
573 mutex_unlock(&sbs->lock);
574 return result;
575 }
576
577 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
578 {
579 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
580 }
581
582 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
583 {
584 struct acpi_battery *battery = seq->private;
585 struct acpi_sbs *sbs = battery->sbs;
586 int rate;
587
588 mutex_lock(&sbs->lock);
589 seq_printf(seq, "present: %s\n",
590 (battery->present) ? "yes" : "no");
591 if (!battery->present)
592 goto end;
593
594 acpi_battery_get_state(battery);
595 seq_printf(seq, "capacity state: %s\n",
596 (battery->state & 0x0010) ? "critical" : "ok");
597 seq_printf(seq, "charging state: %s\n",
598 (battery->rate_now < 0) ? "discharging" :
599 ((battery->rate_now > 0) ? "charging" : "charged"));
600 rate = abs(battery->rate_now) * acpi_battery_ipscale(battery);
601 rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
602 acpi_battery_vscale(battery)/1000):1;
603 seq_printf(seq, "present rate: %d%s\n", rate,
604 acpi_battery_units(battery));
605 seq_printf(seq, "remaining capacity: %i%sh\n",
606 battery->capacity_now * acpi_battery_scale(battery),
607 acpi_battery_units(battery));
608 seq_printf(seq, "present voltage: %i mV\n",
609 battery->voltage_now * acpi_battery_vscale(battery));
610
611 end:
612 mutex_unlock(&sbs->lock);
613 return 0;
614 }
615
616 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
617 {
618 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
619 }
620
621 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
622 {
623 struct acpi_battery *battery = seq->private;
624 struct acpi_sbs *sbs = battery->sbs;
625 int result = 0;
626
627 mutex_lock(&sbs->lock);
628
629 if (!battery->present) {
630 seq_printf(seq, "present: no\n");
631 goto end;
632 }
633
634 acpi_battery_get_alarm(battery);
635 seq_printf(seq, "alarm: ");
636 if (battery->alarm_capacity)
637 seq_printf(seq, "%i%sh\n",
638 battery->alarm_capacity *
639 acpi_battery_scale(battery),
640 acpi_battery_units(battery));
641 else
642 seq_printf(seq, "disabled\n");
643 end:
644 mutex_unlock(&sbs->lock);
645 return result;
646 }
647
648 static ssize_t
649 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
650 size_t count, loff_t * ppos)
651 {
652 struct seq_file *seq = file->private_data;
653 struct acpi_battery *battery = seq->private;
654 struct acpi_sbs *sbs = battery->sbs;
655 char alarm_string[12] = { '\0' };
656 int result = 0;
657 mutex_lock(&sbs->lock);
658 if (!battery->present) {
659 result = -ENODEV;
660 goto end;
661 }
662 if (count > sizeof(alarm_string) - 1) {
663 result = -EINVAL;
664 goto end;
665 }
666 if (copy_from_user(alarm_string, buffer, count)) {
667 result = -EFAULT;
668 goto end;
669 }
670 alarm_string[count] = 0;
671 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
672 acpi_battery_scale(battery);
673 acpi_battery_set_alarm(battery);
674 end:
675 mutex_unlock(&sbs->lock);
676 if (result)
677 return result;
678 return count;
679 }
680
681 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
682 {
683 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
684 }
685
686 static const struct file_operations acpi_battery_info_fops = {
687 .open = acpi_battery_info_open_fs,
688 .read = seq_read,
689 .llseek = seq_lseek,
690 .release = single_release,
691 .owner = THIS_MODULE,
692 };
693
694 static const struct file_operations acpi_battery_state_fops = {
695 .open = acpi_battery_state_open_fs,
696 .read = seq_read,
697 .llseek = seq_lseek,
698 .release = single_release,
699 .owner = THIS_MODULE,
700 };
701
702 static const struct file_operations acpi_battery_alarm_fops = {
703 .open = acpi_battery_alarm_open_fs,
704 .read = seq_read,
705 .write = acpi_battery_write_alarm,
706 .llseek = seq_lseek,
707 .release = single_release,
708 .owner = THIS_MODULE,
709 };
710
711 /* Legacy AC Adapter Interface */
712
713 static struct proc_dir_entry *acpi_ac_dir = NULL;
714
715 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
716 {
717
718 struct acpi_sbs *sbs = seq->private;
719
720 mutex_lock(&sbs->lock);
721
722 seq_printf(seq, "state: %s\n",
723 sbs->charger_present ? "on-line" : "off-line");
724
725 mutex_unlock(&sbs->lock);
726 return 0;
727 }
728
729 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
730 {
731 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
732 }
733
734 static const struct file_operations acpi_ac_state_fops = {
735 .open = acpi_ac_state_open_fs,
736 .read = seq_read,
737 .llseek = seq_lseek,
738 .release = single_release,
739 .owner = THIS_MODULE,
740 };
741
742 #endif
743
744 /* --------------------------------------------------------------------------
745 Driver Interface
746 -------------------------------------------------------------------------- */
747 static int acpi_battery_read(struct acpi_battery *battery)
748 {
749 int result = 0, saved_present = battery->present;
750 u16 state;
751
752 if (battery->sbs->manager_present) {
753 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
754 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
755 if (!result)
756 battery->present = state & (1 << battery->id);
757 state &= 0x0fff;
758 state |= 1 << (battery->id + 12);
759 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
760 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
761 } else if (battery->id == 0)
762 battery->present = 1;
763 if (result || !battery->present)
764 return result;
765
766 if (saved_present != battery->present) {
767 battery->update_time = 0;
768 result = acpi_battery_get_info(battery);
769 if (result)
770 return result;
771 }
772 result = acpi_battery_get_state(battery);
773 return result;
774 }
775
776 /* Smart Battery */
777 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
778 {
779 struct acpi_battery *battery = &sbs->battery[id];
780 int result;
781
782 battery->id = id;
783 battery->sbs = sbs;
784 result = acpi_battery_read(battery);
785 if (result)
786 return result;
787
788 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
789 #ifdef CONFIG_ACPI_PROCFS_POWER
790 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
791 battery->name, &acpi_battery_info_fops,
792 &acpi_battery_state_fops, &acpi_battery_alarm_fops,
793 battery);
794 #endif
795 #ifdef CONFIG_ACPI_SYSFS_POWER
796 battery->bat.name = battery->name;
797 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
798 if (!acpi_battery_mode(battery)) {
799 battery->bat.properties = sbs_charge_battery_props;
800 battery->bat.num_properties =
801 ARRAY_SIZE(sbs_charge_battery_props);
802 } else {
803 battery->bat.properties = sbs_energy_battery_props;
804 battery->bat.num_properties =
805 ARRAY_SIZE(sbs_energy_battery_props);
806 }
807 battery->bat.get_property = acpi_sbs_battery_get_property;
808 result = power_supply_register(&sbs->device->dev, &battery->bat);
809 if (result)
810 goto end;
811 result = device_create_file(battery->bat.dev, &alarm_attr);
812 if (result)
813 goto end;
814 battery->have_sysfs_alarm = 1;
815 end:
816 #endif
817 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
818 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
819 battery->name, battery->present ? "present" : "absent");
820 return result;
821 }
822
823 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
824 {
825 struct acpi_battery *battery = &sbs->battery[id];
826 #ifdef CONFIG_ACPI_SYSFS_POWER
827 if (battery->bat.dev) {
828 if (battery->have_sysfs_alarm)
829 device_remove_file(battery->bat.dev, &alarm_attr);
830 power_supply_unregister(&battery->bat);
831 }
832 #endif
833 #ifdef CONFIG_ACPI_PROCFS_POWER
834 if (battery->proc_entry)
835 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
836 #endif
837 }
838
839 static int acpi_charger_add(struct acpi_sbs *sbs)
840 {
841 int result;
842
843 result = acpi_ac_get_present(sbs);
844 if (result)
845 goto end;
846 #ifdef CONFIG_ACPI_PROCFS_POWER
847 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
848 ACPI_AC_DIR_NAME, NULL,
849 &acpi_ac_state_fops, NULL, sbs);
850 if (result)
851 goto end;
852 #endif
853 #ifdef CONFIG_ACPI_SYSFS_POWER
854 sbs->charger.name = "sbs-charger";
855 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
856 sbs->charger.properties = sbs_ac_props;
857 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
858 sbs->charger.get_property = sbs_get_ac_property;
859 power_supply_register(&sbs->device->dev, &sbs->charger);
860 #endif
861 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
862 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
863 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
864 end:
865 return result;
866 }
867
868 static void acpi_charger_remove(struct acpi_sbs *sbs)
869 {
870 #ifdef CONFIG_ACPI_SYSFS_POWER
871 if (sbs->charger.dev)
872 power_supply_unregister(&sbs->charger);
873 #endif
874 #ifdef CONFIG_ACPI_PROCFS_POWER
875 if (sbs->charger_entry)
876 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
877 #endif
878 }
879
880 static void acpi_sbs_callback(void *context)
881 {
882 int id;
883 struct acpi_sbs *sbs = context;
884 struct acpi_battery *bat;
885 u8 saved_charger_state = sbs->charger_present;
886 u8 saved_battery_state;
887 acpi_ac_get_present(sbs);
888 if (sbs->charger_present != saved_charger_state) {
889 #ifdef CONFIG_ACPI_PROC_EVENT
890 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
891 ACPI_SBS_NOTIFY_STATUS,
892 sbs->charger_present);
893 #endif
894 #ifdef CONFIG_ACPI_SYSFS_POWER
895 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
896 #endif
897 }
898 if (sbs->manager_present) {
899 for (id = 0; id < MAX_SBS_BAT; ++id) {
900 if (!(sbs->batteries_supported & (1 << id)))
901 continue;
902 bat = &sbs->battery[id];
903 saved_battery_state = bat->present;
904 acpi_battery_read(bat);
905 if (saved_battery_state == bat->present)
906 continue;
907 #ifdef CONFIG_ACPI_PROC_EVENT
908 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
909 bat->name,
910 ACPI_SBS_NOTIFY_STATUS,
911 bat->present);
912 #endif
913 #ifdef CONFIG_ACPI_SYSFS_POWER
914 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
915 #endif
916 }
917 }
918 }
919
920 static int acpi_sbs_remove(struct acpi_device *device, int type);
921
922 static int acpi_sbs_add(struct acpi_device *device)
923 {
924 struct acpi_sbs *sbs;
925 int result = 0;
926 int id;
927
928 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
929 if (!sbs) {
930 result = -ENOMEM;
931 goto end;
932 }
933
934 mutex_init(&sbs->lock);
935
936 sbs->hc = acpi_driver_data(device->parent);
937 sbs->device = device;
938 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
939 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
940 device->driver_data = sbs;
941
942 result = acpi_charger_add(sbs);
943 if (result)
944 goto end;
945
946 result = acpi_manager_get_info(sbs);
947 if (!result) {
948 sbs->manager_present = 1;
949 for (id = 0; id < MAX_SBS_BAT; ++id)
950 if ((sbs->batteries_supported & (1 << id)))
951 acpi_battery_add(sbs, id);
952 } else
953 acpi_battery_add(sbs, 0);
954 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
955 end:
956 if (result)
957 acpi_sbs_remove(device, 0);
958 return result;
959 }
960
961 static int acpi_sbs_remove(struct acpi_device *device, int type)
962 {
963 struct acpi_sbs *sbs;
964 int id;
965
966 if (!device)
967 return -EINVAL;
968 sbs = acpi_driver_data(device);
969 if (!sbs)
970 return -EINVAL;
971 mutex_lock(&sbs->lock);
972 acpi_smbus_unregister_callback(sbs->hc);
973 for (id = 0; id < MAX_SBS_BAT; ++id)
974 acpi_battery_remove(sbs, id);
975 acpi_charger_remove(sbs);
976 mutex_unlock(&sbs->lock);
977 mutex_destroy(&sbs->lock);
978 kfree(sbs);
979 return 0;
980 }
981
982 static void acpi_sbs_rmdirs(void)
983 {
984 #ifdef CONFIG_ACPI_PROCFS_POWER
985 if (acpi_ac_dir) {
986 acpi_unlock_ac_dir(acpi_ac_dir);
987 acpi_ac_dir = NULL;
988 }
989 if (acpi_battery_dir) {
990 acpi_unlock_battery_dir(acpi_battery_dir);
991 acpi_battery_dir = NULL;
992 }
993 #endif
994 }
995
996 static int acpi_sbs_resume(struct acpi_device *device)
997 {
998 struct acpi_sbs *sbs;
999 if (!device)
1000 return -EINVAL;
1001 sbs = device->driver_data;
1002 acpi_sbs_callback(sbs);
1003 return 0;
1004 }
1005
1006 static struct acpi_driver acpi_sbs_driver = {
1007 .name = "sbs",
1008 .class = ACPI_SBS_CLASS,
1009 .ids = sbs_device_ids,
1010 .ops = {
1011 .add = acpi_sbs_add,
1012 .remove = acpi_sbs_remove,
1013 .resume = acpi_sbs_resume,
1014 },
1015 };
1016
1017 static int __init acpi_sbs_init(void)
1018 {
1019 int result = 0;
1020
1021 if (acpi_disabled)
1022 return -ENODEV;
1023 #ifdef CONFIG_ACPI_PROCFS_POWER
1024 acpi_ac_dir = acpi_lock_ac_dir();
1025 if (!acpi_ac_dir)
1026 return -ENODEV;
1027 acpi_battery_dir = acpi_lock_battery_dir();
1028 if (!acpi_battery_dir) {
1029 acpi_sbs_rmdirs();
1030 return -ENODEV;
1031 }
1032 #endif
1033 result = acpi_bus_register_driver(&acpi_sbs_driver);
1034 if (result < 0) {
1035 acpi_sbs_rmdirs();
1036 return -ENODEV;
1037 }
1038 return 0;
1039 }
1040
1041 static void __exit acpi_sbs_exit(void)
1042 {
1043 acpi_bus_unregister_driver(&acpi_sbs_driver);
1044 acpi_sbs_rmdirs();
1045 return;
1046 }
1047
1048 module_init(acpi_sbs_init);
1049 module_exit(acpi_sbs_exit);
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