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ptrace: annotate lock context change on exit_ptrace()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / acpi / sbs.c
blobe5dbedb16bbfdde815170acbea225b69c65224fd
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 #include <linux/power_supply.h>
44
45 #include "sbshc.h"
46
47 #define PREFIX "ACPI: "
48
49 #define ACPI_SBS_CLASS "sbs"
50 #define ACPI_AC_CLASS "ac_adapter"
51 #define ACPI_BATTERY_CLASS "battery"
52 #define ACPI_SBS_DEVICE_NAME "Smart Battery System"
53 #define ACPI_SBS_FILE_INFO "info"
54 #define ACPI_SBS_FILE_STATE "state"
55 #define ACPI_SBS_FILE_ALARM "alarm"
56 #define ACPI_BATTERY_DIR_NAME "BAT%i"
57 #define ACPI_AC_DIR_NAME "AC0"
58
59 #define ACPI_SBS_NOTIFY_STATUS 0x80
60 #define ACPI_SBS_NOTIFY_INFO 0x81
61
62 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
63 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
64 MODULE_LICENSE("GPL");
65
66 static unsigned int cache_time = 1000;
67 module_param(cache_time, uint, 0644);
68 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
69
70 extern struct proc_dir_entry *acpi_lock_ac_dir(void);
71 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
72 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
73 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
74
75 #define MAX_SBS_BAT 4
76 #define ACPI_SBS_BLOCK_MAX 32
77
78 static const struct acpi_device_id sbs_device_ids[] = {
79 {"ACPI0002", 0},
80 {"", 0},
81 };
82 MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
83
84 struct acpi_battery {
85 struct power_supply bat;
86 struct acpi_sbs *sbs;
87 #ifdef CONFIG_ACPI_PROCFS_POWER
88 struct proc_dir_entry *proc_entry;
89 #endif
90 unsigned long update_time;
91 char name[8];
92 char manufacturer_name[ACPI_SBS_BLOCK_MAX];
93 char device_name[ACPI_SBS_BLOCK_MAX];
94 char device_chemistry[ACPI_SBS_BLOCK_MAX];
95 u16 alarm_capacity;
96 u16 full_charge_capacity;
97 u16 design_capacity;
98 u16 design_voltage;
99 u16 serial_number;
100 u16 cycle_count;
101 u16 temp_now;
102 u16 voltage_now;
103 s16 rate_now;
104 s16 rate_avg;
105 u16 capacity_now;
106 u16 state_of_charge;
107 u16 state;
108 u16 mode;
109 u16 spec;
110 u8 id;
111 u8 present:1;
112 u8 have_sysfs_alarm:1;
113 };
114
115 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
116
117 struct acpi_sbs {
118 struct power_supply charger;
119 struct acpi_device *device;
120 struct acpi_smb_hc *hc;
121 struct mutex lock;
122 #ifdef CONFIG_ACPI_PROCFS_POWER
123 struct proc_dir_entry *charger_entry;
124 #endif
125 struct acpi_battery battery[MAX_SBS_BAT];
126 u8 batteries_supported:4;
127 u8 manager_present:1;
128 u8 charger_present:1;
129 };
130
131 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
132
133 static inline int battery_scale(int log)
134 {
135 int scale = 1;
136 while (log--)
137 scale *= 10;
138 return scale;
139 }
140
141 static inline int acpi_battery_vscale(struct acpi_battery *battery)
142 {
143 return battery_scale((battery->spec & 0x0f00) >> 8);
144 }
145
146 static inline int acpi_battery_ipscale(struct acpi_battery *battery)
147 {
148 return battery_scale((battery->spec & 0xf000) >> 12);
149 }
150
151 static inline int acpi_battery_mode(struct acpi_battery *battery)
152 {
153 return (battery->mode & 0x8000);
154 }
155
156 static inline int acpi_battery_scale(struct acpi_battery *battery)
157 {
158 return (acpi_battery_mode(battery) ? 10 : 1) *
159 acpi_battery_ipscale(battery);
160 }
161
162 static int sbs_get_ac_property(struct power_supply *psy,
163 enum power_supply_property psp,
164 union power_supply_propval *val)
165 {
166 struct acpi_sbs *sbs = to_acpi_sbs(psy);
167 switch (psp) {
168 case POWER_SUPPLY_PROP_ONLINE:
169 val->intval = sbs->charger_present;
170 break;
171 default:
172 return -EINVAL;
173 }
174 return 0;
175 }
176
177 static int acpi_battery_technology(struct acpi_battery *battery)
178 {
179 if (!strcasecmp("NiCd", battery->device_chemistry))
180 return POWER_SUPPLY_TECHNOLOGY_NiCd;
181 if (!strcasecmp("NiMH", battery->device_chemistry))
182 return POWER_SUPPLY_TECHNOLOGY_NiMH;
183 if (!strcasecmp("LION", battery->device_chemistry))
184 return POWER_SUPPLY_TECHNOLOGY_LION;
185 if (!strcasecmp("LiP", battery->device_chemistry))
186 return POWER_SUPPLY_TECHNOLOGY_LIPO;
187 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
188 }
189
190 static int acpi_sbs_battery_get_property(struct power_supply *psy,
191 enum power_supply_property psp,
192 union power_supply_propval *val)
193 {
194 struct acpi_battery *battery = to_acpi_battery(psy);
195
196 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
197 return -ENODEV;
198 switch (psp) {
199 case POWER_SUPPLY_PROP_STATUS:
200 if (battery->rate_now < 0)
201 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
202 else if (battery->rate_now > 0)
203 val->intval = POWER_SUPPLY_STATUS_CHARGING;
204 else
205 val->intval = POWER_SUPPLY_STATUS_FULL;
206 break;
207 case POWER_SUPPLY_PROP_PRESENT:
208 val->intval = battery->present;
209 break;
210 case POWER_SUPPLY_PROP_TECHNOLOGY:
211 val->intval = acpi_battery_technology(battery);
212 break;
213 case POWER_SUPPLY_PROP_CYCLE_COUNT:
214 val->intval = battery->cycle_count;
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 case POWER_SUPPLY_PROP_POWER_NOW:
226 val->intval = abs(battery->rate_now) *
227 acpi_battery_ipscale(battery) * 1000;
228 break;
229 case POWER_SUPPLY_PROP_CURRENT_AVG:
230 case POWER_SUPPLY_PROP_POWER_AVG:
231 val->intval = abs(battery->rate_avg) *
232 acpi_battery_ipscale(battery) * 1000;
233 break;
234 case POWER_SUPPLY_PROP_CAPACITY:
235 val->intval = battery->state_of_charge;
236 break;
237 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
238 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
239 val->intval = battery->design_capacity *
240 acpi_battery_scale(battery) * 1000;
241 break;
242 case POWER_SUPPLY_PROP_CHARGE_FULL:
243 case POWER_SUPPLY_PROP_ENERGY_FULL:
244 val->intval = battery->full_charge_capacity *
245 acpi_battery_scale(battery) * 1000;
246 break;
247 case POWER_SUPPLY_PROP_CHARGE_NOW:
248 case POWER_SUPPLY_PROP_ENERGY_NOW:
249 val->intval = battery->capacity_now *
250 acpi_battery_scale(battery) * 1000;
251 break;
252 case POWER_SUPPLY_PROP_TEMP:
253 val->intval = battery->temp_now - 2730; // dK -> dC
254 break;
255 case POWER_SUPPLY_PROP_MODEL_NAME:
256 val->strval = battery->device_name;
257 break;
258 case POWER_SUPPLY_PROP_MANUFACTURER:
259 val->strval = battery->manufacturer_name;
260 break;
261 default:
262 return -EINVAL;
263 }
264 return 0;
265 }
266
267 static enum power_supply_property sbs_ac_props[] = {
268 POWER_SUPPLY_PROP_ONLINE,
269 };
270
271 static enum power_supply_property sbs_charge_battery_props[] = {
272 POWER_SUPPLY_PROP_STATUS,
273 POWER_SUPPLY_PROP_PRESENT,
274 POWER_SUPPLY_PROP_TECHNOLOGY,
275 POWER_SUPPLY_PROP_CYCLE_COUNT,
276 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
277 POWER_SUPPLY_PROP_VOLTAGE_NOW,
278 POWER_SUPPLY_PROP_CURRENT_NOW,
279 POWER_SUPPLY_PROP_CURRENT_AVG,
280 POWER_SUPPLY_PROP_CAPACITY,
281 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
282 POWER_SUPPLY_PROP_CHARGE_FULL,
283 POWER_SUPPLY_PROP_CHARGE_NOW,
284 POWER_SUPPLY_PROP_TEMP,
285 POWER_SUPPLY_PROP_MODEL_NAME,
286 POWER_SUPPLY_PROP_MANUFACTURER,
287 };
288
289 static enum power_supply_property sbs_energy_battery_props[] = {
290 POWER_SUPPLY_PROP_STATUS,
291 POWER_SUPPLY_PROP_PRESENT,
292 POWER_SUPPLY_PROP_TECHNOLOGY,
293 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
294 POWER_SUPPLY_PROP_VOLTAGE_NOW,
295 POWER_SUPPLY_PROP_CURRENT_NOW,
296 POWER_SUPPLY_PROP_CURRENT_AVG,
297 POWER_SUPPLY_PROP_POWER_NOW,
298 POWER_SUPPLY_PROP_POWER_AVG,
299 POWER_SUPPLY_PROP_CAPACITY,
300 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
301 POWER_SUPPLY_PROP_ENERGY_FULL,
302 POWER_SUPPLY_PROP_ENERGY_NOW,
303 POWER_SUPPLY_PROP_TEMP,
304 POWER_SUPPLY_PROP_MODEL_NAME,
305 POWER_SUPPLY_PROP_MANUFACTURER,
306 };
307
308
309 /* --------------------------------------------------------------------------
310 Smart Battery System Management
311 -------------------------------------------------------------------------- */
312
313 struct acpi_battery_reader {
314 u8 command; /* command for battery */
315 u8 mode; /* word or block? */
316 size_t offset; /* offset inside struct acpi_sbs_battery */
317 };
318
319 static struct acpi_battery_reader info_readers[] = {
320 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
321 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
322 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
323 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
324 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
325 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
326 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
327 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
328 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
329 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
330 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
331 };
332
333 static struct acpi_battery_reader state_readers[] = {
334 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
335 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
336 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
337 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
338 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
339 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
340 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
341 };
342
343 static int acpi_manager_get_info(struct acpi_sbs *sbs)
344 {
345 int result = 0;
346 u16 battery_system_info;
347
348 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
349 0x04, (u8 *)&battery_system_info);
350 if (!result)
351 sbs->batteries_supported = battery_system_info & 0x000f;
352 return result;
353 }
354
355 static int acpi_battery_get_info(struct acpi_battery *battery)
356 {
357 int i, result = 0;
358
359 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
360 result = acpi_smbus_read(battery->sbs->hc,
361 info_readers[i].mode,
362 ACPI_SBS_BATTERY,
363 info_readers[i].command,
364 (u8 *) battery +
365 info_readers[i].offset);
366 if (result)
367 break;
368 }
369 return result;
370 }
371
372 static int acpi_battery_get_state(struct acpi_battery *battery)
373 {
374 int i, result = 0;
375
376 if (battery->update_time &&
377 time_before(jiffies, battery->update_time +
378 msecs_to_jiffies(cache_time)))
379 return 0;
380 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
381 result = acpi_smbus_read(battery->sbs->hc,
382 state_readers[i].mode,
383 ACPI_SBS_BATTERY,
384 state_readers[i].command,
385 (u8 *)battery +
386 state_readers[i].offset);
387 if (result)
388 goto end;
389 }
390 end:
391 battery->update_time = jiffies;
392 return result;
393 }
394
395 static int acpi_battery_get_alarm(struct acpi_battery *battery)
396 {
397 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
398 ACPI_SBS_BATTERY, 0x01,
399 (u8 *)&battery->alarm_capacity);
400 }
401
402 static int acpi_battery_set_alarm(struct acpi_battery *battery)
403 {
404 struct acpi_sbs *sbs = battery->sbs;
405 u16 value, sel = 1 << (battery->id + 12);
406
407 int ret;
408
409
410 if (sbs->manager_present) {
411 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
412 0x01, (u8 *)&value);
413 if (ret)
414 goto end;
415 if ((value & 0xf000) != sel) {
416 value &= 0x0fff;
417 value |= sel;
418 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
419 ACPI_SBS_MANAGER,
420 0x01, (u8 *)&value, 2);
421 if (ret)
422 goto end;
423 }
424 }
425 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
426 0x01, (u8 *)&battery->alarm_capacity, 2);
427 end:
428 return ret;
429 }
430
431 static int acpi_ac_get_present(struct acpi_sbs *sbs)
432 {
433 int result;
434 u16 status;
435
436 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
437 0x13, (u8 *) & status);
438 if (!result)
439 sbs->charger_present = (status >> 15) & 0x1;
440 return result;
441 }
442
443 static ssize_t acpi_battery_alarm_show(struct device *dev,
444 struct device_attribute *attr,
445 char *buf)
446 {
447 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
448 acpi_battery_get_alarm(battery);
449 return sprintf(buf, "%d\n", battery->alarm_capacity *
450 acpi_battery_scale(battery) * 1000);
451 }
452
453 static ssize_t acpi_battery_alarm_store(struct device *dev,
454 struct device_attribute *attr,
455 const char *buf, size_t count)
456 {
457 unsigned long x;
458 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
459 if (sscanf(buf, "%ld\n", &x) == 1)
460 battery->alarm_capacity = x /
461 (1000 * acpi_battery_scale(battery));
462 if (battery->present)
463 acpi_battery_set_alarm(battery);
464 return count;
465 }
466
467 static struct device_attribute alarm_attr = {
468 .attr = {.name = "alarm", .mode = 0644},
469 .show = acpi_battery_alarm_show,
470 .store = acpi_battery_alarm_store,
471 };
472
473 /* --------------------------------------------------------------------------
474 FS Interface (/proc/acpi)
475 -------------------------------------------------------------------------- */
476
477 #ifdef CONFIG_ACPI_PROCFS_POWER
478 /* Generic Routines */
479 static int
480 acpi_sbs_add_fs(struct proc_dir_entry **dir,
481 struct proc_dir_entry *parent_dir,
482 char *dir_name,
483 const struct file_operations *info_fops,
484 const struct file_operations *state_fops,
485 const struct file_operations *alarm_fops, void *data)
486 {
487 if (!*dir) {
488 *dir = proc_mkdir(dir_name, parent_dir);
489 if (!*dir) {
490 return -ENODEV;
491 }
492 }
493
494 /* 'info' [R] */
495 if (info_fops)
496 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
497 info_fops, data);
498
499 /* 'state' [R] */
500 if (state_fops)
501 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
502 state_fops, data);
503
504 /* 'alarm' [R/W] */
505 if (alarm_fops)
506 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
507 alarm_fops, data);
508 return 0;
509 }
510
511 static void
512 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
513 struct proc_dir_entry *parent_dir)
514 {
515 if (*dir) {
516 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
517 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
518 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
519 remove_proc_entry((*dir)->name, parent_dir);
520 *dir = NULL;
521 }
522 }
523
524 /* Smart Battery Interface */
525 static struct proc_dir_entry *acpi_battery_dir = NULL;
526
527 static inline char *acpi_battery_units(struct acpi_battery *battery)
528 {
529 return acpi_battery_mode(battery) ? " mW" : " mA";
530 }
531
532
533 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
534 {
535 struct acpi_battery *battery = seq->private;
536 struct acpi_sbs *sbs = battery->sbs;
537 int result = 0;
538
539 mutex_lock(&sbs->lock);
540
541 seq_printf(seq, "present: %s\n",
542 (battery->present) ? "yes" : "no");
543 if (!battery->present)
544 goto end;
545
546 seq_printf(seq, "design capacity: %i%sh\n",
547 battery->design_capacity * acpi_battery_scale(battery),
548 acpi_battery_units(battery));
549 seq_printf(seq, "last full capacity: %i%sh\n",
550 battery->full_charge_capacity * acpi_battery_scale(battery),
551 acpi_battery_units(battery));
552 seq_printf(seq, "battery technology: rechargeable\n");
553 seq_printf(seq, "design voltage: %i mV\n",
554 battery->design_voltage * acpi_battery_vscale(battery));
555 seq_printf(seq, "design capacity warning: unknown\n");
556 seq_printf(seq, "design capacity low: unknown\n");
557 seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
558 seq_printf(seq, "capacity granularity 1: unknown\n");
559 seq_printf(seq, "capacity granularity 2: unknown\n");
560 seq_printf(seq, "model number: %s\n", battery->device_name);
561 seq_printf(seq, "serial number: %i\n",
562 battery->serial_number);
563 seq_printf(seq, "battery type: %s\n",
564 battery->device_chemistry);
565 seq_printf(seq, "OEM info: %s\n",
566 battery->manufacturer_name);
567 end:
568 mutex_unlock(&sbs->lock);
569 return result;
570 }
571
572 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
573 {
574 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
575 }
576
577 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
578 {
579 struct acpi_battery *battery = seq->private;
580 struct acpi_sbs *sbs = battery->sbs;
581 int rate;
582
583 mutex_lock(&sbs->lock);
584 seq_printf(seq, "present: %s\n",
585 (battery->present) ? "yes" : "no");
586 if (!battery->present)
587 goto end;
588
589 acpi_battery_get_state(battery);
590 seq_printf(seq, "capacity state: %s\n",
591 (battery->state & 0x0010) ? "critical" : "ok");
592 seq_printf(seq, "charging state: %s\n",
593 (battery->rate_now < 0) ? "discharging" :
594 ((battery->rate_now > 0) ? "charging" : "charged"));
595 rate = abs(battery->rate_now) * acpi_battery_ipscale(battery);
596 rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
597 acpi_battery_vscale(battery)/1000):1;
598 seq_printf(seq, "present rate: %d%s\n", rate,
599 acpi_battery_units(battery));
600 seq_printf(seq, "remaining capacity: %i%sh\n",
601 battery->capacity_now * acpi_battery_scale(battery),
602 acpi_battery_units(battery));
603 seq_printf(seq, "present voltage: %i mV\n",
604 battery->voltage_now * acpi_battery_vscale(battery));
605
606 end:
607 mutex_unlock(&sbs->lock);
608 return 0;
609 }
610
611 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
612 {
613 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
614 }
615
616 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
617 {
618 struct acpi_battery *battery = seq->private;
619 struct acpi_sbs *sbs = battery->sbs;
620 int result = 0;
621
622 mutex_lock(&sbs->lock);
623
624 if (!battery->present) {
625 seq_printf(seq, "present: no\n");
626 goto end;
627 }
628
629 acpi_battery_get_alarm(battery);
630 seq_printf(seq, "alarm: ");
631 if (battery->alarm_capacity)
632 seq_printf(seq, "%i%sh\n",
633 battery->alarm_capacity *
634 acpi_battery_scale(battery),
635 acpi_battery_units(battery));
636 else
637 seq_printf(seq, "disabled\n");
638 end:
639 mutex_unlock(&sbs->lock);
640 return result;
641 }
642
643 static ssize_t
644 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
645 size_t count, loff_t * ppos)
646 {
647 struct seq_file *seq = file->private_data;
648 struct acpi_battery *battery = seq->private;
649 struct acpi_sbs *sbs = battery->sbs;
650 char alarm_string[12] = { '\0' };
651 int result = 0;
652 mutex_lock(&sbs->lock);
653 if (!battery->present) {
654 result = -ENODEV;
655 goto end;
656 }
657 if (count > sizeof(alarm_string) - 1) {
658 result = -EINVAL;
659 goto end;
660 }
661 if (copy_from_user(alarm_string, buffer, count)) {
662 result = -EFAULT;
663 goto end;
664 }
665 alarm_string[count] = 0;
666 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
667 acpi_battery_scale(battery);
668 acpi_battery_set_alarm(battery);
669 end:
670 mutex_unlock(&sbs->lock);
671 if (result)
672 return result;
673 return count;
674 }
675
676 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
677 {
678 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
679 }
680
681 static const struct file_operations acpi_battery_info_fops = {
682 .open = acpi_battery_info_open_fs,
683 .read = seq_read,
684 .llseek = seq_lseek,
685 .release = single_release,
686 .owner = THIS_MODULE,
687 };
688
689 static const struct file_operations acpi_battery_state_fops = {
690 .open = acpi_battery_state_open_fs,
691 .read = seq_read,
692 .llseek = seq_lseek,
693 .release = single_release,
694 .owner = THIS_MODULE,
695 };
696
697 static const struct file_operations acpi_battery_alarm_fops = {
698 .open = acpi_battery_alarm_open_fs,
699 .read = seq_read,
700 .write = acpi_battery_write_alarm,
701 .llseek = seq_lseek,
702 .release = single_release,
703 .owner = THIS_MODULE,
704 };
705
706 /* Legacy AC Adapter Interface */
707
708 static struct proc_dir_entry *acpi_ac_dir = NULL;
709
710 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
711 {
712
713 struct acpi_sbs *sbs = seq->private;
714
715 mutex_lock(&sbs->lock);
716
717 seq_printf(seq, "state: %s\n",
718 sbs->charger_present ? "on-line" : "off-line");
719
720 mutex_unlock(&sbs->lock);
721 return 0;
722 }
723
724 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
725 {
726 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
727 }
728
729 static const struct file_operations acpi_ac_state_fops = {
730 .open = acpi_ac_state_open_fs,
731 .read = seq_read,
732 .llseek = seq_lseek,
733 .release = single_release,
734 .owner = THIS_MODULE,
735 };
736
737 #endif
738
739 /* --------------------------------------------------------------------------
740 Driver Interface
741 -------------------------------------------------------------------------- */
742 static int acpi_battery_read(struct acpi_battery *battery)
743 {
744 int result = 0, saved_present = battery->present;
745 u16 state;
746
747 if (battery->sbs->manager_present) {
748 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
749 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
750 if (!result)
751 battery->present = state & (1 << battery->id);
752 state &= 0x0fff;
753 state |= 1 << (battery->id + 12);
754 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
755 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
756 } else if (battery->id == 0)
757 battery->present = 1;
758 if (result || !battery->present)
759 return result;
760
761 if (saved_present != battery->present) {
762 battery->update_time = 0;
763 result = acpi_battery_get_info(battery);
764 if (result)
765 return result;
766 }
767 result = acpi_battery_get_state(battery);
768 return result;
769 }
770
771 /* Smart Battery */
772 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
773 {
774 struct acpi_battery *battery = &sbs->battery[id];
775 int result;
776
777 battery->id = id;
778 battery->sbs = sbs;
779 result = acpi_battery_read(battery);
780 if (result)
781 return result;
782
783 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
784 #ifdef CONFIG_ACPI_PROCFS_POWER
785 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
786 battery->name, &acpi_battery_info_fops,
787 &acpi_battery_state_fops, &acpi_battery_alarm_fops,
788 battery);
789 #endif
790 battery->bat.name = battery->name;
791 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
792 if (!acpi_battery_mode(battery)) {
793 battery->bat.properties = sbs_charge_battery_props;
794 battery->bat.num_properties =
795 ARRAY_SIZE(sbs_charge_battery_props);
796 } else {
797 battery->bat.properties = sbs_energy_battery_props;
798 battery->bat.num_properties =
799 ARRAY_SIZE(sbs_energy_battery_props);
800 }
801 battery->bat.get_property = acpi_sbs_battery_get_property;
802 result = power_supply_register(&sbs->device->dev, &battery->bat);
803 if (result)
804 goto end;
805 result = device_create_file(battery->bat.dev, &alarm_attr);
806 if (result)
807 goto end;
808 battery->have_sysfs_alarm = 1;
809 end:
810 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
811 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
812 battery->name, battery->present ? "present" : "absent");
813 return result;
814 }
815
816 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
817 {
818 struct acpi_battery *battery = &sbs->battery[id];
819
820 if (battery->bat.dev) {
821 if (battery->have_sysfs_alarm)
822 device_remove_file(battery->bat.dev, &alarm_attr);
823 power_supply_unregister(&battery->bat);
824 }
825 #ifdef CONFIG_ACPI_PROCFS_POWER
826 if (battery->proc_entry)
827 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
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 static 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 device->driver_data = 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);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree