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be2net: account for skb allocation failures
[linux-2.6.git] / drivers / acpi / sbs.c
blob51ae3794ec7f895f16cb2cf4545f6f146860909f
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 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for SBS is loaded,"
488 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
489 if (!*dir) {
490 *dir = proc_mkdir(dir_name, parent_dir);
491 if (!*dir) {
492 return -ENODEV;
493 }
494 }
495
496 /* 'info' [R] */
497 if (info_fops)
498 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
499 info_fops, data);
500
501 /* 'state' [R] */
502 if (state_fops)
503 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
504 state_fops, data);
505
506 /* 'alarm' [R/W] */
507 if (alarm_fops)
508 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
509 alarm_fops, data);
510 return 0;
511 }
512
513 static void
514 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
515 struct proc_dir_entry *parent_dir)
516 {
517 if (*dir) {
518 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
519 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
520 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
521 remove_proc_entry((*dir)->name, parent_dir);
522 *dir = NULL;
523 }
524 }
525
526 /* Smart Battery Interface */
527 static struct proc_dir_entry *acpi_battery_dir = NULL;
528
529 static inline char *acpi_battery_units(struct acpi_battery *battery)
530 {
531 return acpi_battery_mode(battery) ? " mW" : " mA";
532 }
533
534
535 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
536 {
537 struct acpi_battery *battery = seq->private;
538 struct acpi_sbs *sbs = battery->sbs;
539 int result = 0;
540
541 mutex_lock(&sbs->lock);
542
543 seq_printf(seq, "present: %s\n",
544 (battery->present) ? "yes" : "no");
545 if (!battery->present)
546 goto end;
547
548 seq_printf(seq, "design capacity: %i%sh\n",
549 battery->design_capacity * acpi_battery_scale(battery),
550 acpi_battery_units(battery));
551 seq_printf(seq, "last full capacity: %i%sh\n",
552 battery->full_charge_capacity * acpi_battery_scale(battery),
553 acpi_battery_units(battery));
554 seq_printf(seq, "battery technology: rechargeable\n");
555 seq_printf(seq, "design voltage: %i mV\n",
556 battery->design_voltage * acpi_battery_vscale(battery));
557 seq_printf(seq, "design capacity warning: unknown\n");
558 seq_printf(seq, "design capacity low: unknown\n");
559 seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
560 seq_printf(seq, "capacity granularity 1: unknown\n");
561 seq_printf(seq, "capacity granularity 2: unknown\n");
562 seq_printf(seq, "model number: %s\n", battery->device_name);
563 seq_printf(seq, "serial number: %i\n",
564 battery->serial_number);
565 seq_printf(seq, "battery type: %s\n",
566 battery->device_chemistry);
567 seq_printf(seq, "OEM info: %s\n",
568 battery->manufacturer_name);
569 end:
570 mutex_unlock(&sbs->lock);
571 return result;
572 }
573
574 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
575 {
576 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
577 }
578
579 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
580 {
581 struct acpi_battery *battery = seq->private;
582 struct acpi_sbs *sbs = battery->sbs;
583 int rate;
584
585 mutex_lock(&sbs->lock);
586 seq_printf(seq, "present: %s\n",
587 (battery->present) ? "yes" : "no");
588 if (!battery->present)
589 goto end;
590
591 acpi_battery_get_state(battery);
592 seq_printf(seq, "capacity state: %s\n",
593 (battery->state & 0x0010) ? "critical" : "ok");
594 seq_printf(seq, "charging state: %s\n",
595 (battery->rate_now < 0) ? "discharging" :
596 ((battery->rate_now > 0) ? "charging" : "charged"));
597 rate = abs(battery->rate_now) * acpi_battery_ipscale(battery);
598 rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
599 acpi_battery_vscale(battery)/1000):1;
600 seq_printf(seq, "present rate: %d%s\n", rate,
601 acpi_battery_units(battery));
602 seq_printf(seq, "remaining capacity: %i%sh\n",
603 battery->capacity_now * acpi_battery_scale(battery),
604 acpi_battery_units(battery));
605 seq_printf(seq, "present voltage: %i mV\n",
606 battery->voltage_now * acpi_battery_vscale(battery));
607
608 end:
609 mutex_unlock(&sbs->lock);
610 return 0;
611 }
612
613 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
614 {
615 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
616 }
617
618 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
619 {
620 struct acpi_battery *battery = seq->private;
621 struct acpi_sbs *sbs = battery->sbs;
622 int result = 0;
623
624 mutex_lock(&sbs->lock);
625
626 if (!battery->present) {
627 seq_printf(seq, "present: no\n");
628 goto end;
629 }
630
631 acpi_battery_get_alarm(battery);
632 seq_printf(seq, "alarm: ");
633 if (battery->alarm_capacity)
634 seq_printf(seq, "%i%sh\n",
635 battery->alarm_capacity *
636 acpi_battery_scale(battery),
637 acpi_battery_units(battery));
638 else
639 seq_printf(seq, "disabled\n");
640 end:
641 mutex_unlock(&sbs->lock);
642 return result;
643 }
644
645 static ssize_t
646 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
647 size_t count, loff_t * ppos)
648 {
649 struct seq_file *seq = file->private_data;
650 struct acpi_battery *battery = seq->private;
651 struct acpi_sbs *sbs = battery->sbs;
652 char alarm_string[12] = { '\0' };
653 int result = 0;
654 mutex_lock(&sbs->lock);
655 if (!battery->present) {
656 result = -ENODEV;
657 goto end;
658 }
659 if (count > sizeof(alarm_string) - 1) {
660 result = -EINVAL;
661 goto end;
662 }
663 if (copy_from_user(alarm_string, buffer, count)) {
664 result = -EFAULT;
665 goto end;
666 }
667 alarm_string[count] = 0;
668 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
669 acpi_battery_scale(battery);
670 acpi_battery_set_alarm(battery);
671 end:
672 mutex_unlock(&sbs->lock);
673 if (result)
674 return result;
675 return count;
676 }
677
678 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
679 {
680 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
681 }
682
683 static const struct file_operations acpi_battery_info_fops = {
684 .open = acpi_battery_info_open_fs,
685 .read = seq_read,
686 .llseek = seq_lseek,
687 .release = single_release,
688 .owner = THIS_MODULE,
689 };
690
691 static const struct file_operations acpi_battery_state_fops = {
692 .open = acpi_battery_state_open_fs,
693 .read = seq_read,
694 .llseek = seq_lseek,
695 .release = single_release,
696 .owner = THIS_MODULE,
697 };
698
699 static const struct file_operations acpi_battery_alarm_fops = {
700 .open = acpi_battery_alarm_open_fs,
701 .read = seq_read,
702 .write = acpi_battery_write_alarm,
703 .llseek = seq_lseek,
704 .release = single_release,
705 .owner = THIS_MODULE,
706 };
707
708 /* Legacy AC Adapter Interface */
709
710 static struct proc_dir_entry *acpi_ac_dir = NULL;
711
712 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
713 {
714
715 struct acpi_sbs *sbs = seq->private;
716
717 mutex_lock(&sbs->lock);
718
719 seq_printf(seq, "state: %s\n",
720 sbs->charger_present ? "on-line" : "off-line");
721
722 mutex_unlock(&sbs->lock);
723 return 0;
724 }
725
726 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
727 {
728 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
729 }
730
731 static const struct file_operations acpi_ac_state_fops = {
732 .open = acpi_ac_state_open_fs,
733 .read = seq_read,
734 .llseek = seq_lseek,
735 .release = single_release,
736 .owner = THIS_MODULE,
737 };
738
739 #endif
740
741 /* --------------------------------------------------------------------------
742 Driver Interface
743 -------------------------------------------------------------------------- */
744 static int acpi_battery_read(struct acpi_battery *battery)
745 {
746 int result = 0, saved_present = battery->present;
747 u16 state;
748
749 if (battery->sbs->manager_present) {
750 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
751 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
752 if (!result)
753 battery->present = state & (1 << battery->id);
754 state &= 0x0fff;
755 state |= 1 << (battery->id + 12);
756 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
757 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
758 } else if (battery->id == 0)
759 battery->present = 1;
760 if (result || !battery->present)
761 return result;
762
763 if (saved_present != battery->present) {
764 battery->update_time = 0;
765 result = acpi_battery_get_info(battery);
766 if (result)
767 return result;
768 }
769 result = acpi_battery_get_state(battery);
770 return result;
771 }
772
773 /* Smart Battery */
774 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
775 {
776 struct acpi_battery *battery = &sbs->battery[id];
777 int result;
778
779 battery->id = id;
780 battery->sbs = sbs;
781 result = acpi_battery_read(battery);
782 if (result)
783 return result;
784
785 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
786 #ifdef CONFIG_ACPI_PROCFS_POWER
787 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
788 battery->name, &acpi_battery_info_fops,
789 &acpi_battery_state_fops, &acpi_battery_alarm_fops,
790 battery);
791 #endif
792 battery->bat.name = battery->name;
793 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
794 if (!acpi_battery_mode(battery)) {
795 battery->bat.properties = sbs_charge_battery_props;
796 battery->bat.num_properties =
797 ARRAY_SIZE(sbs_charge_battery_props);
798 } else {
799 battery->bat.properties = sbs_energy_battery_props;
800 battery->bat.num_properties =
801 ARRAY_SIZE(sbs_energy_battery_props);
802 }
803 battery->bat.get_property = acpi_sbs_battery_get_property;
804 result = power_supply_register(&sbs->device->dev, &battery->bat);
805 if (result)
806 goto end;
807 result = device_create_file(battery->bat.dev, &alarm_attr);
808 if (result)
809 goto end;
810 battery->have_sysfs_alarm = 1;
811 end:
812 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
813 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
814 battery->name, battery->present ? "present" : "absent");
815 return result;
816 }
817
818 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
819 {
820 struct acpi_battery *battery = &sbs->battery[id];
821
822 if (battery->bat.dev) {
823 if (battery->have_sysfs_alarm)
824 device_remove_file(battery->bat.dev, &alarm_attr);
825 power_supply_unregister(&battery->bat);
826 }
827 #ifdef CONFIG_ACPI_PROCFS_POWER
828 if (battery->proc_entry)
829 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
830 #endif
831 }
832
833 static int acpi_charger_add(struct acpi_sbs *sbs)
834 {
835 int result;
836
837 result = acpi_ac_get_present(sbs);
838 if (result)
839 goto end;
840 #ifdef CONFIG_ACPI_PROCFS_POWER
841 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
842 ACPI_AC_DIR_NAME, NULL,
843 &acpi_ac_state_fops, NULL, sbs);
844 if (result)
845 goto end;
846 #endif
847 sbs->charger.name = "sbs-charger";
848 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
849 sbs->charger.properties = sbs_ac_props;
850 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
851 sbs->charger.get_property = sbs_get_ac_property;
852 power_supply_register(&sbs->device->dev, &sbs->charger);
853 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
854 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
855 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
856 end:
857 return result;
858 }
859
860 static void acpi_charger_remove(struct acpi_sbs *sbs)
861 {
862 if (sbs->charger.dev)
863 power_supply_unregister(&sbs->charger);
864 #ifdef CONFIG_ACPI_PROCFS_POWER
865 if (sbs->charger_entry)
866 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
867 #endif
868 }
869
870 static void acpi_sbs_callback(void *context)
871 {
872 int id;
873 struct acpi_sbs *sbs = context;
874 struct acpi_battery *bat;
875 u8 saved_charger_state = sbs->charger_present;
876 u8 saved_battery_state;
877 acpi_ac_get_present(sbs);
878 if (sbs->charger_present != saved_charger_state) {
879 #ifdef CONFIG_ACPI_PROC_EVENT
880 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
881 ACPI_SBS_NOTIFY_STATUS,
882 sbs->charger_present);
883 #endif
884 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
885 }
886 if (sbs->manager_present) {
887 for (id = 0; id < MAX_SBS_BAT; ++id) {
888 if (!(sbs->batteries_supported & (1 << id)))
889 continue;
890 bat = &sbs->battery[id];
891 saved_battery_state = bat->present;
892 acpi_battery_read(bat);
893 if (saved_battery_state == bat->present)
894 continue;
895 #ifdef CONFIG_ACPI_PROC_EVENT
896 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
897 bat->name,
898 ACPI_SBS_NOTIFY_STATUS,
899 bat->present);
900 #endif
901 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
902 }
903 }
904 }
905
906 static int acpi_sbs_remove(struct acpi_device *device, int type);
907
908 static int acpi_sbs_add(struct acpi_device *device)
909 {
910 struct acpi_sbs *sbs;
911 int result = 0;
912 int id;
913
914 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
915 if (!sbs) {
916 result = -ENOMEM;
917 goto end;
918 }
919
920 mutex_init(&sbs->lock);
921
922 sbs->hc = acpi_driver_data(device->parent);
923 sbs->device = device;
924 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
925 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
926 device->driver_data = sbs;
927
928 result = acpi_charger_add(sbs);
929 if (result)
930 goto end;
931
932 result = acpi_manager_get_info(sbs);
933 if (!result) {
934 sbs->manager_present = 1;
935 for (id = 0; id < MAX_SBS_BAT; ++id)
936 if ((sbs->batteries_supported & (1 << id)))
937 acpi_battery_add(sbs, id);
938 } else
939 acpi_battery_add(sbs, 0);
940 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
941 end:
942 if (result)
943 acpi_sbs_remove(device, 0);
944 return result;
945 }
946
947 static int acpi_sbs_remove(struct acpi_device *device, int type)
948 {
949 struct acpi_sbs *sbs;
950 int id;
951
952 if (!device)
953 return -EINVAL;
954 sbs = acpi_driver_data(device);
955 if (!sbs)
956 return -EINVAL;
957 mutex_lock(&sbs->lock);
958 acpi_smbus_unregister_callback(sbs->hc);
959 for (id = 0; id < MAX_SBS_BAT; ++id)
960 acpi_battery_remove(sbs, id);
961 acpi_charger_remove(sbs);
962 mutex_unlock(&sbs->lock);
963 mutex_destroy(&sbs->lock);
964 kfree(sbs);
965 return 0;
966 }
967
968 static void acpi_sbs_rmdirs(void)
969 {
970 #ifdef CONFIG_ACPI_PROCFS_POWER
971 if (acpi_ac_dir) {
972 acpi_unlock_ac_dir(acpi_ac_dir);
973 acpi_ac_dir = NULL;
974 }
975 if (acpi_battery_dir) {
976 acpi_unlock_battery_dir(acpi_battery_dir);
977 acpi_battery_dir = NULL;
978 }
979 #endif
980 }
981
982 static int acpi_sbs_resume(struct acpi_device *device)
983 {
984 struct acpi_sbs *sbs;
985 if (!device)
986 return -EINVAL;
987 sbs = device->driver_data;
988 acpi_sbs_callback(sbs);
989 return 0;
990 }
991
992 static struct acpi_driver acpi_sbs_driver = {
993 .name = "sbs",
994 .class = ACPI_SBS_CLASS,
995 .ids = sbs_device_ids,
996 .ops = {
997 .add = acpi_sbs_add,
998 .remove = acpi_sbs_remove,
999 .resume = acpi_sbs_resume,
1000 },
1001 };
1002
1003 static int __init acpi_sbs_init(void)
1004 {
1005 int result = 0;
1006
1007 if (acpi_disabled)
1008 return -ENODEV;
1009 #ifdef CONFIG_ACPI_PROCFS_POWER
1010 acpi_ac_dir = acpi_lock_ac_dir();
1011 if (!acpi_ac_dir)
1012 return -ENODEV;
1013 acpi_battery_dir = acpi_lock_battery_dir();
1014 if (!acpi_battery_dir) {
1015 acpi_sbs_rmdirs();
1016 return -ENODEV;
1017 }
1018 #endif
1019 result = acpi_bus_register_driver(&acpi_sbs_driver);
1020 if (result < 0) {
1021 acpi_sbs_rmdirs();
1022 return -ENODEV;
1023 }
1024 return 0;
1025 }
1026
1027 static void __exit acpi_sbs_exit(void)
1028 {
1029 acpi_bus_unregister_driver(&acpi_sbs_driver);
1030 acpi_sbs_rmdirs();
1031 return;
1032 }
1033
1034 module_init(acpi_sbs_init);
1035 module_exit(acpi_sbs_exit);
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