include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-3.10.git] / drivers / acpi / sbs.c
1 /*
2  *  sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $)
3  *
4  *  Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
5  *  Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
6  *  Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu>
7  *
8  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9  *
10  *  This program is free software; you can redistribute it and/or modify
11  *  it under the terms of the GNU General Public License as published by
12  *  the Free Software Foundation; either version 2 of the License, or (at
13  *  your option) any later version.
14  *
15  *  This program is distributed in the hope that it will be useful, but
16  *  WITHOUT ANY WARRANTY; without even the implied warranty of
17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  *  General Public License for more details.
19  *
20  *  You should have received a copy of the GNU General Public License along
21  *  with this program; if not, write to the Free Software Foundation, Inc.,
22  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23  *
24  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25  */
26
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/module.h>
30 #include <linux/moduleparam.h>
31 #include <linux/kernel.h>
32
33 #ifdef CONFIG_ACPI_PROCFS_POWER
34 #include <linux/proc_fs.h>
35 #include <linux/seq_file.h>
36 #include <asm/uaccess.h>
37 #endif
38
39 #include <linux/acpi.h>
40 #include <linux/timer.h>
41 #include <linux/jiffies.h>
42 #include <linux/delay.h>
43
44 #ifdef CONFIG_ACPI_SYSFS_POWER
45 #include <linux/power_supply.h>
46 #endif
47
48 #include "sbshc.h"
49
50 #define PREFIX "ACPI: "
51
52 #define ACPI_SBS_CLASS                  "sbs"
53 #define ACPI_AC_CLASS                   "ac_adapter"
54 #define ACPI_BATTERY_CLASS              "battery"
55 #define ACPI_SBS_DEVICE_NAME            "Smart Battery System"
56 #define ACPI_SBS_FILE_INFO              "info"
57 #define ACPI_SBS_FILE_STATE             "state"
58 #define ACPI_SBS_FILE_ALARM             "alarm"
59 #define ACPI_BATTERY_DIR_NAME           "BAT%i"
60 #define ACPI_AC_DIR_NAME                "AC0"
61
62 #define ACPI_SBS_NOTIFY_STATUS          0x80
63 #define ACPI_SBS_NOTIFY_INFO            0x81
64
65 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
66 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
67 MODULE_LICENSE("GPL");
68
69 static unsigned int cache_time = 1000;
70 module_param(cache_time, uint, 0644);
71 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
72
73 extern struct proc_dir_entry *acpi_lock_ac_dir(void);
74 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
75 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
76 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
77
78 #define MAX_SBS_BAT                     4
79 #define ACPI_SBS_BLOCK_MAX              32
80
81 static const struct acpi_device_id sbs_device_ids[] = {
82         {"ACPI0002", 0},
83         {"", 0},
84 };
85 MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
86
87 struct acpi_battery {
88 #ifdef CONFIG_ACPI_SYSFS_POWER
89         struct power_supply bat;
90 #endif
91         struct acpi_sbs *sbs;
92 #ifdef CONFIG_ACPI_PROCFS_POWER
93         struct proc_dir_entry *proc_entry;
94 #endif
95         unsigned long update_time;
96         char name[8];
97         char manufacturer_name[ACPI_SBS_BLOCK_MAX];
98         char device_name[ACPI_SBS_BLOCK_MAX];
99         char device_chemistry[ACPI_SBS_BLOCK_MAX];
100         u16 alarm_capacity;
101         u16 full_charge_capacity;
102         u16 design_capacity;
103         u16 design_voltage;
104         u16 serial_number;
105         u16 cycle_count;
106         u16 temp_now;
107         u16 voltage_now;
108         s16 rate_now;
109         s16 rate_avg;
110         u16 capacity_now;
111         u16 state_of_charge;
112         u16 state;
113         u16 mode;
114         u16 spec;
115         u8 id;
116         u8 present:1;
117         u8 have_sysfs_alarm:1;
118 };
119
120 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
121
122 struct acpi_sbs {
123 #ifdef CONFIG_ACPI_SYSFS_POWER
124         struct power_supply charger;
125 #endif
126         struct acpi_device *device;
127         struct acpi_smb_hc *hc;
128         struct mutex lock;
129 #ifdef CONFIG_ACPI_PROCFS_POWER
130         struct proc_dir_entry *charger_entry;
131 #endif
132         struct acpi_battery battery[MAX_SBS_BAT];
133         u8 batteries_supported:4;
134         u8 manager_present:1;
135         u8 charger_present:1;
136 };
137
138 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
139
140 static inline int battery_scale(int log)
141 {
142         int scale = 1;
143         while (log--)
144                 scale *= 10;
145         return scale;
146 }
147
148 static inline int acpi_battery_vscale(struct acpi_battery *battery)
149 {
150         return battery_scale((battery->spec & 0x0f00) >> 8);
151 }
152
153 static inline int acpi_battery_ipscale(struct acpi_battery *battery)
154 {
155         return battery_scale((battery->spec & 0xf000) >> 12);
156 }
157
158 static inline int acpi_battery_mode(struct acpi_battery *battery)
159 {
160         return (battery->mode & 0x8000);
161 }
162
163 static inline int acpi_battery_scale(struct acpi_battery *battery)
164 {
165         return (acpi_battery_mode(battery) ? 10 : 1) *
166             acpi_battery_ipscale(battery);
167 }
168
169 #ifdef CONFIG_ACPI_SYSFS_POWER
170 static int sbs_get_ac_property(struct power_supply *psy,
171                                enum power_supply_property psp,
172                                union power_supply_propval *val)
173 {
174         struct acpi_sbs *sbs = to_acpi_sbs(psy);
175         switch (psp) {
176         case POWER_SUPPLY_PROP_ONLINE:
177                 val->intval = sbs->charger_present;
178                 break;
179         default:
180                 return -EINVAL;
181         }
182         return 0;
183 }
184
185 static int acpi_battery_technology(struct acpi_battery *battery)
186 {
187         if (!strcasecmp("NiCd", battery->device_chemistry))
188                 return POWER_SUPPLY_TECHNOLOGY_NiCd;
189         if (!strcasecmp("NiMH", battery->device_chemistry))
190                 return POWER_SUPPLY_TECHNOLOGY_NiMH;
191         if (!strcasecmp("LION", battery->device_chemistry))
192                 return POWER_SUPPLY_TECHNOLOGY_LION;
193         if (!strcasecmp("LiP", battery->device_chemistry))
194                 return POWER_SUPPLY_TECHNOLOGY_LIPO;
195         return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
196 }
197
198 static int acpi_sbs_battery_get_property(struct power_supply *psy,
199                                          enum power_supply_property psp,
200                                          union power_supply_propval *val)
201 {
202         struct acpi_battery *battery = to_acpi_battery(psy);
203
204         if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
205                 return -ENODEV;
206         switch (psp) {
207         case POWER_SUPPLY_PROP_STATUS:
208                 if (battery->rate_now < 0)
209                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
210                 else if (battery->rate_now > 0)
211                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
212                 else
213                         val->intval = POWER_SUPPLY_STATUS_FULL;
214                 break;
215         case POWER_SUPPLY_PROP_PRESENT:
216                 val->intval = battery->present;
217                 break;
218         case POWER_SUPPLY_PROP_TECHNOLOGY:
219                 val->intval = acpi_battery_technology(battery);
220                 break;
221         case POWER_SUPPLY_PROP_CYCLE_COUNT:
222                 val->intval = battery->cycle_count;
223                 break;
224         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
225                 val->intval = battery->design_voltage *
226                         acpi_battery_vscale(battery) * 1000;
227                 break;
228         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
229                 val->intval = battery->voltage_now *
230                                 acpi_battery_vscale(battery) * 1000;
231                 break;
232         case POWER_SUPPLY_PROP_CURRENT_NOW:
233         case POWER_SUPPLY_PROP_POWER_NOW:
234                 val->intval = abs(battery->rate_now) *
235                                 acpi_battery_ipscale(battery) * 1000;
236                 break;
237         case POWER_SUPPLY_PROP_CURRENT_AVG:
238         case POWER_SUPPLY_PROP_POWER_AVG:
239                 val->intval = abs(battery->rate_avg) *
240                                 acpi_battery_ipscale(battery) * 1000;
241                 break;
242         case POWER_SUPPLY_PROP_CAPACITY:
243                 val->intval = battery->state_of_charge;
244                 break;
245         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
246         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
247                 val->intval = battery->design_capacity *
248                         acpi_battery_scale(battery) * 1000;
249                 break;
250         case POWER_SUPPLY_PROP_CHARGE_FULL:
251         case POWER_SUPPLY_PROP_ENERGY_FULL:
252                 val->intval = battery->full_charge_capacity *
253                         acpi_battery_scale(battery) * 1000;
254                 break;
255         case POWER_SUPPLY_PROP_CHARGE_NOW:
256         case POWER_SUPPLY_PROP_ENERGY_NOW:
257                 val->intval = battery->capacity_now *
258                                 acpi_battery_scale(battery) * 1000;
259                 break;
260         case POWER_SUPPLY_PROP_TEMP:
261                 val->intval = battery->temp_now - 2730; // dK -> dC
262                 break;
263         case POWER_SUPPLY_PROP_MODEL_NAME:
264                 val->strval = battery->device_name;
265                 break;
266         case POWER_SUPPLY_PROP_MANUFACTURER:
267                 val->strval = battery->manufacturer_name;
268                 break;
269         default:
270                 return -EINVAL;
271         }
272         return 0;
273 }
274
275 static enum power_supply_property sbs_ac_props[] = {
276         POWER_SUPPLY_PROP_ONLINE,
277 };
278
279 static enum power_supply_property sbs_charge_battery_props[] = {
280         POWER_SUPPLY_PROP_STATUS,
281         POWER_SUPPLY_PROP_PRESENT,
282         POWER_SUPPLY_PROP_TECHNOLOGY,
283         POWER_SUPPLY_PROP_CYCLE_COUNT,
284         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
285         POWER_SUPPLY_PROP_VOLTAGE_NOW,
286         POWER_SUPPLY_PROP_CURRENT_NOW,
287         POWER_SUPPLY_PROP_CURRENT_AVG,
288         POWER_SUPPLY_PROP_CAPACITY,
289         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
290         POWER_SUPPLY_PROP_CHARGE_FULL,
291         POWER_SUPPLY_PROP_CHARGE_NOW,
292         POWER_SUPPLY_PROP_TEMP,
293         POWER_SUPPLY_PROP_MODEL_NAME,
294         POWER_SUPPLY_PROP_MANUFACTURER,
295 };
296
297 static enum power_supply_property sbs_energy_battery_props[] = {
298         POWER_SUPPLY_PROP_STATUS,
299         POWER_SUPPLY_PROP_PRESENT,
300         POWER_SUPPLY_PROP_TECHNOLOGY,
301         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
302         POWER_SUPPLY_PROP_VOLTAGE_NOW,
303         POWER_SUPPLY_PROP_CURRENT_NOW,
304         POWER_SUPPLY_PROP_CURRENT_AVG,
305         POWER_SUPPLY_PROP_POWER_NOW,
306         POWER_SUPPLY_PROP_POWER_AVG,
307         POWER_SUPPLY_PROP_CAPACITY,
308         POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
309         POWER_SUPPLY_PROP_ENERGY_FULL,
310         POWER_SUPPLY_PROP_ENERGY_NOW,
311         POWER_SUPPLY_PROP_TEMP,
312         POWER_SUPPLY_PROP_MODEL_NAME,
313         POWER_SUPPLY_PROP_MANUFACTURER,
314 };
315
316 #endif
317
318 /* --------------------------------------------------------------------------
319                             Smart Battery System Management
320    -------------------------------------------------------------------------- */
321
322 struct acpi_battery_reader {
323         u8 command;             /* command for battery */
324         u8 mode;                /* word or block? */
325         size_t offset;          /* offset inside struct acpi_sbs_battery */
326 };
327
328 static struct acpi_battery_reader info_readers[] = {
329         {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
330         {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
331         {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
332         {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
333         {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
334         {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
335         {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
336         {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
337         {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
338         {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
339         {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
340 };
341
342 static struct acpi_battery_reader state_readers[] = {
343         {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
344         {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
345         {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
346         {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
347         {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
348         {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
349         {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
350 };
351
352 static int acpi_manager_get_info(struct acpi_sbs *sbs)
353 {
354         int result = 0;
355         u16 battery_system_info;
356
357         result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
358                                  0x04, (u8 *)&battery_system_info);
359         if (!result)
360                 sbs->batteries_supported = battery_system_info & 0x000f;
361         return result;
362 }
363
364 static int acpi_battery_get_info(struct acpi_battery *battery)
365 {
366         int i, result = 0;
367
368         for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
369                 result = acpi_smbus_read(battery->sbs->hc,
370                                          info_readers[i].mode,
371                                          ACPI_SBS_BATTERY,
372                                          info_readers[i].command,
373                                          (u8 *) battery +
374                                                 info_readers[i].offset);
375                 if (result)
376                         break;
377         }
378         return result;
379 }
380
381 static int acpi_battery_get_state(struct acpi_battery *battery)
382 {
383         int i, result = 0;
384
385         if (battery->update_time &&
386             time_before(jiffies, battery->update_time +
387                                 msecs_to_jiffies(cache_time)))
388                 return 0;
389         for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
390                 result = acpi_smbus_read(battery->sbs->hc,
391                                          state_readers[i].mode,
392                                          ACPI_SBS_BATTERY,
393                                          state_readers[i].command,
394                                          (u8 *)battery +
395                                                 state_readers[i].offset);
396                 if (result)
397                         goto end;
398         }
399       end:
400         battery->update_time = jiffies;
401         return result;
402 }
403
404 static int acpi_battery_get_alarm(struct acpi_battery *battery)
405 {
406         return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
407                                  ACPI_SBS_BATTERY, 0x01,
408                                  (u8 *)&battery->alarm_capacity);
409 }
410
411 static int acpi_battery_set_alarm(struct acpi_battery *battery)
412 {
413         struct acpi_sbs *sbs = battery->sbs;
414         u16 value, sel = 1 << (battery->id + 12);
415
416         int ret;
417
418
419         if (sbs->manager_present) {
420                 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
421                                 0x01, (u8 *)&value);
422                 if (ret)
423                         goto end;
424                 if ((value & 0xf000) != sel) {
425                         value &= 0x0fff;
426                         value |= sel;
427                 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
428                                          ACPI_SBS_MANAGER,
429                                          0x01, (u8 *)&value, 2);
430                 if (ret)
431                         goto end;
432                 }
433         }
434         ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
435                                 0x01, (u8 *)&battery->alarm_capacity, 2);
436       end:
437         return ret;
438 }
439
440 static int acpi_ac_get_present(struct acpi_sbs *sbs)
441 {
442         int result;
443         u16 status;
444
445         result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
446                                  0x13, (u8 *) & status);
447         if (!result)
448                 sbs->charger_present = (status >> 15) & 0x1;
449         return result;
450 }
451
452 #ifdef CONFIG_ACPI_SYSFS_POWER
453 static ssize_t acpi_battery_alarm_show(struct device *dev,
454                                         struct device_attribute *attr,
455                                         char *buf)
456 {
457         struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
458         acpi_battery_get_alarm(battery);
459         return sprintf(buf, "%d\n", battery->alarm_capacity *
460                                 acpi_battery_scale(battery) * 1000);
461 }
462
463 static ssize_t acpi_battery_alarm_store(struct device *dev,
464                                         struct device_attribute *attr,
465                                         const char *buf, size_t count)
466 {
467         unsigned long x;
468         struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
469         if (sscanf(buf, "%ld\n", &x) == 1)
470                 battery->alarm_capacity = x /
471                         (1000 * acpi_battery_scale(battery));
472         if (battery->present)
473                 acpi_battery_set_alarm(battery);
474         return count;
475 }
476
477 static struct device_attribute alarm_attr = {
478         .attr = {.name = "alarm", .mode = 0644},
479         .show = acpi_battery_alarm_show,
480         .store = acpi_battery_alarm_store,
481 };
482 #endif
483
484 /* --------------------------------------------------------------------------
485                               FS Interface (/proc/acpi)
486    -------------------------------------------------------------------------- */
487
488 #ifdef CONFIG_ACPI_PROCFS_POWER
489 /* Generic Routines */
490 static int
491 acpi_sbs_add_fs(struct proc_dir_entry **dir,
492                 struct proc_dir_entry *parent_dir,
493                 char *dir_name,
494                 const struct file_operations *info_fops,
495                 const struct file_operations *state_fops,
496                 const struct file_operations *alarm_fops, void *data)
497 {
498         if (!*dir) {
499                 *dir = proc_mkdir(dir_name, parent_dir);
500                 if (!*dir) {
501                         return -ENODEV;
502                 }
503         }
504
505         /* 'info' [R] */
506         if (info_fops)
507                 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
508                                  info_fops, data);
509
510         /* 'state' [R] */
511         if (state_fops)
512                 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
513                                  state_fops, data);
514
515         /* 'alarm' [R/W] */
516         if (alarm_fops)
517                 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
518                                  alarm_fops, data);
519         return 0;
520 }
521
522 static void
523 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
524                            struct proc_dir_entry *parent_dir)
525 {
526         if (*dir) {
527                 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
528                 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
529                 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
530                 remove_proc_entry((*dir)->name, parent_dir);
531                 *dir = NULL;
532         }
533 }
534
535 /* Smart Battery Interface */
536 static struct proc_dir_entry *acpi_battery_dir = NULL;
537
538 static inline char *acpi_battery_units(struct acpi_battery *battery)
539 {
540         return acpi_battery_mode(battery) ? " mW" : " mA";
541 }
542
543
544 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
545 {
546         struct acpi_battery *battery = seq->private;
547         struct acpi_sbs *sbs = battery->sbs;
548         int result = 0;
549
550         mutex_lock(&sbs->lock);
551
552         seq_printf(seq, "present:                 %s\n",
553                    (battery->present) ? "yes" : "no");
554         if (!battery->present)
555                 goto end;
556
557         seq_printf(seq, "design capacity:         %i%sh\n",
558                    battery->design_capacity * acpi_battery_scale(battery),
559                    acpi_battery_units(battery));
560         seq_printf(seq, "last full capacity:      %i%sh\n",
561                    battery->full_charge_capacity * acpi_battery_scale(battery),
562                    acpi_battery_units(battery));
563         seq_printf(seq, "battery technology:      rechargeable\n");
564         seq_printf(seq, "design voltage:          %i mV\n",
565                    battery->design_voltage * acpi_battery_vscale(battery));
566         seq_printf(seq, "design capacity warning: unknown\n");
567         seq_printf(seq, "design capacity low:     unknown\n");
568         seq_printf(seq, "cycle count:             %i\n", battery->cycle_count);
569         seq_printf(seq, "capacity granularity 1:  unknown\n");
570         seq_printf(seq, "capacity granularity 2:  unknown\n");
571         seq_printf(seq, "model number:            %s\n", battery->device_name);
572         seq_printf(seq, "serial number:           %i\n",
573                    battery->serial_number);
574         seq_printf(seq, "battery type:            %s\n",
575                    battery->device_chemistry);
576         seq_printf(seq, "OEM info:                %s\n",
577                    battery->manufacturer_name);
578       end:
579         mutex_unlock(&sbs->lock);
580         return result;
581 }
582
583 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
584 {
585         return single_open(file, acpi_battery_read_info, PDE(inode)->data);
586 }
587
588 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
589 {
590         struct acpi_battery *battery = seq->private;
591         struct acpi_sbs *sbs = battery->sbs;
592         int rate;
593
594         mutex_lock(&sbs->lock);
595         seq_printf(seq, "present:                 %s\n",
596                    (battery->present) ? "yes" : "no");
597         if (!battery->present)
598                 goto end;
599
600         acpi_battery_get_state(battery);
601         seq_printf(seq, "capacity state:          %s\n",
602                    (battery->state & 0x0010) ? "critical" : "ok");
603         seq_printf(seq, "charging state:          %s\n",
604                    (battery->rate_now < 0) ? "discharging" :
605                    ((battery->rate_now > 0) ? "charging" : "charged"));
606         rate = abs(battery->rate_now) * acpi_battery_ipscale(battery);
607         rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
608                         acpi_battery_vscale(battery)/1000):1;
609         seq_printf(seq, "present rate:            %d%s\n", rate,
610                    acpi_battery_units(battery));
611         seq_printf(seq, "remaining capacity:      %i%sh\n",
612                    battery->capacity_now * acpi_battery_scale(battery),
613                    acpi_battery_units(battery));
614         seq_printf(seq, "present voltage:         %i mV\n",
615                    battery->voltage_now * acpi_battery_vscale(battery));
616
617       end:
618         mutex_unlock(&sbs->lock);
619         return 0;
620 }
621
622 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
623 {
624         return single_open(file, acpi_battery_read_state, PDE(inode)->data);
625 }
626
627 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
628 {
629         struct acpi_battery *battery = seq->private;
630         struct acpi_sbs *sbs = battery->sbs;
631         int result = 0;
632
633         mutex_lock(&sbs->lock);
634
635         if (!battery->present) {
636                 seq_printf(seq, "present:                 no\n");
637                 goto end;
638         }
639
640         acpi_battery_get_alarm(battery);
641         seq_printf(seq, "alarm:                   ");
642         if (battery->alarm_capacity)
643                 seq_printf(seq, "%i%sh\n",
644                            battery->alarm_capacity *
645                            acpi_battery_scale(battery),
646                            acpi_battery_units(battery));
647         else
648                 seq_printf(seq, "disabled\n");
649       end:
650         mutex_unlock(&sbs->lock);
651         return result;
652 }
653
654 static ssize_t
655 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
656                          size_t count, loff_t * ppos)
657 {
658         struct seq_file *seq = file->private_data;
659         struct acpi_battery *battery = seq->private;
660         struct acpi_sbs *sbs = battery->sbs;
661         char alarm_string[12] = { '\0' };
662         int result = 0;
663         mutex_lock(&sbs->lock);
664         if (!battery->present) {
665                 result = -ENODEV;
666                 goto end;
667         }
668         if (count > sizeof(alarm_string) - 1) {
669                 result = -EINVAL;
670                 goto end;
671         }
672         if (copy_from_user(alarm_string, buffer, count)) {
673                 result = -EFAULT;
674                 goto end;
675         }
676         alarm_string[count] = 0;
677         battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
678                                         acpi_battery_scale(battery);
679         acpi_battery_set_alarm(battery);
680       end:
681         mutex_unlock(&sbs->lock);
682         if (result)
683                 return result;
684         return count;
685 }
686
687 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
688 {
689         return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
690 }
691
692 static const struct file_operations acpi_battery_info_fops = {
693         .open = acpi_battery_info_open_fs,
694         .read = seq_read,
695         .llseek = seq_lseek,
696         .release = single_release,
697         .owner = THIS_MODULE,
698 };
699
700 static const struct file_operations acpi_battery_state_fops = {
701         .open = acpi_battery_state_open_fs,
702         .read = seq_read,
703         .llseek = seq_lseek,
704         .release = single_release,
705         .owner = THIS_MODULE,
706 };
707
708 static const struct file_operations acpi_battery_alarm_fops = {
709         .open = acpi_battery_alarm_open_fs,
710         .read = seq_read,
711         .write = acpi_battery_write_alarm,
712         .llseek = seq_lseek,
713         .release = single_release,
714         .owner = THIS_MODULE,
715 };
716
717 /* Legacy AC Adapter Interface */
718
719 static struct proc_dir_entry *acpi_ac_dir = NULL;
720
721 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
722 {
723
724         struct acpi_sbs *sbs = seq->private;
725
726         mutex_lock(&sbs->lock);
727
728         seq_printf(seq, "state:                   %s\n",
729                    sbs->charger_present ? "on-line" : "off-line");
730
731         mutex_unlock(&sbs->lock);
732         return 0;
733 }
734
735 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
736 {
737         return single_open(file, acpi_ac_read_state, PDE(inode)->data);
738 }
739
740 static const struct file_operations acpi_ac_state_fops = {
741         .open = acpi_ac_state_open_fs,
742         .read = seq_read,
743         .llseek = seq_lseek,
744         .release = single_release,
745         .owner = THIS_MODULE,
746 };
747
748 #endif
749
750 /* --------------------------------------------------------------------------
751                                  Driver Interface
752    -------------------------------------------------------------------------- */
753 static int acpi_battery_read(struct acpi_battery *battery)
754 {
755         int result = 0, saved_present = battery->present;
756         u16 state;
757
758         if (battery->sbs->manager_present) {
759                 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
760                                 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
761                 if (!result)
762                         battery->present = state & (1 << battery->id);
763                 state &= 0x0fff;
764                 state |= 1 << (battery->id + 12);
765                 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
766                                   ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
767         } else if (battery->id == 0)
768                 battery->present = 1;
769         if (result || !battery->present)
770                 return result;
771
772         if (saved_present != battery->present) {
773                 battery->update_time = 0;
774                 result = acpi_battery_get_info(battery);
775                 if (result)
776                         return result;
777         }
778         result = acpi_battery_get_state(battery);
779         return result;
780 }
781
782 /* Smart Battery */
783 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
784 {
785         struct acpi_battery *battery = &sbs->battery[id];
786         int result;
787
788         battery->id = id;
789         battery->sbs = sbs;
790         result = acpi_battery_read(battery);
791         if (result)
792                 return result;
793
794         sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
795 #ifdef CONFIG_ACPI_PROCFS_POWER
796         acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
797                         battery->name, &acpi_battery_info_fops,
798                         &acpi_battery_state_fops, &acpi_battery_alarm_fops,
799                         battery);
800 #endif
801 #ifdef CONFIG_ACPI_SYSFS_POWER
802         battery->bat.name = battery->name;
803         battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
804         if (!acpi_battery_mode(battery)) {
805                 battery->bat.properties = sbs_charge_battery_props;
806                 battery->bat.num_properties =
807                     ARRAY_SIZE(sbs_charge_battery_props);
808         } else {
809                 battery->bat.properties = sbs_energy_battery_props;
810                 battery->bat.num_properties =
811                     ARRAY_SIZE(sbs_energy_battery_props);
812         }
813         battery->bat.get_property = acpi_sbs_battery_get_property;
814         result = power_supply_register(&sbs->device->dev, &battery->bat);
815         if (result)
816                 goto end;
817         result = device_create_file(battery->bat.dev, &alarm_attr);
818         if (result)
819                 goto end;
820         battery->have_sysfs_alarm = 1;
821       end:
822 #endif
823         printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
824                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
825                battery->name, battery->present ? "present" : "absent");
826         return result;
827 }
828
829 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
830 {
831 #if defined(CONFIG_ACPI_SYSFS_POWER) || defined(CONFIG_ACPI_PROCFS_POWER)
832         struct acpi_battery *battery = &sbs->battery[id];
833 #endif
834
835 #ifdef CONFIG_ACPI_SYSFS_POWER
836         if (battery->bat.dev) {
837                 if (battery->have_sysfs_alarm)
838                         device_remove_file(battery->bat.dev, &alarm_attr);
839                 power_supply_unregister(&battery->bat);
840         }
841 #endif
842 #ifdef CONFIG_ACPI_PROCFS_POWER
843         if (battery->proc_entry)
844                 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
845 #endif
846 }
847
848 static int acpi_charger_add(struct acpi_sbs *sbs)
849 {
850         int result;
851
852         result = acpi_ac_get_present(sbs);
853         if (result)
854                 goto end;
855 #ifdef CONFIG_ACPI_PROCFS_POWER
856         result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
857                                  ACPI_AC_DIR_NAME, NULL,
858                                  &acpi_ac_state_fops, NULL, sbs);
859         if (result)
860                 goto end;
861 #endif
862 #ifdef CONFIG_ACPI_SYSFS_POWER
863         sbs->charger.name = "sbs-charger";
864         sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
865         sbs->charger.properties = sbs_ac_props;
866         sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
867         sbs->charger.get_property = sbs_get_ac_property;
868         power_supply_register(&sbs->device->dev, &sbs->charger);
869 #endif
870         printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
871                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
872                ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
873       end:
874         return result;
875 }
876
877 static void acpi_charger_remove(struct acpi_sbs *sbs)
878 {
879 #ifdef CONFIG_ACPI_SYSFS_POWER
880         if (sbs->charger.dev)
881                 power_supply_unregister(&sbs->charger);
882 #endif
883 #ifdef CONFIG_ACPI_PROCFS_POWER
884         if (sbs->charger_entry)
885                 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
886 #endif
887 }
888
889 static void acpi_sbs_callback(void *context)
890 {
891         int id;
892         struct acpi_sbs *sbs = context;
893         struct acpi_battery *bat;
894         u8 saved_charger_state = sbs->charger_present;
895         u8 saved_battery_state;
896         acpi_ac_get_present(sbs);
897         if (sbs->charger_present != saved_charger_state) {
898 #ifdef CONFIG_ACPI_PROC_EVENT
899                 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
900                                               ACPI_SBS_NOTIFY_STATUS,
901                                               sbs->charger_present);
902 #endif
903 #ifdef CONFIG_ACPI_SYSFS_POWER
904                 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
905 #endif
906         }
907         if (sbs->manager_present) {
908                 for (id = 0; id < MAX_SBS_BAT; ++id) {
909                         if (!(sbs->batteries_supported & (1 << id)))
910                                 continue;
911                         bat = &sbs->battery[id];
912                         saved_battery_state = bat->present;
913                         acpi_battery_read(bat);
914                         if (saved_battery_state == bat->present)
915                                 continue;
916 #ifdef CONFIG_ACPI_PROC_EVENT
917                         acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
918                                                       bat->name,
919                                                       ACPI_SBS_NOTIFY_STATUS,
920                                                       bat->present);
921 #endif
922 #ifdef CONFIG_ACPI_SYSFS_POWER
923                         kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
924 #endif
925                 }
926         }
927 }
928
929 static int acpi_sbs_remove(struct acpi_device *device, int type);
930
931 static int acpi_sbs_add(struct acpi_device *device)
932 {
933         struct acpi_sbs *sbs;
934         int result = 0;
935         int id;
936
937         sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
938         if (!sbs) {
939                 result = -ENOMEM;
940                 goto end;
941         }
942
943         mutex_init(&sbs->lock);
944
945         sbs->hc = acpi_driver_data(device->parent);
946         sbs->device = device;
947         strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
948         strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
949         device->driver_data = sbs;
950
951         result = acpi_charger_add(sbs);
952         if (result)
953                 goto end;
954
955         result = acpi_manager_get_info(sbs);
956         if (!result) {
957                 sbs->manager_present = 1;
958                 for (id = 0; id < MAX_SBS_BAT; ++id)
959                         if ((sbs->batteries_supported & (1 << id)))
960                                 acpi_battery_add(sbs, id);
961         } else
962                 acpi_battery_add(sbs, 0);
963         acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
964       end:
965         if (result)
966                 acpi_sbs_remove(device, 0);
967         return result;
968 }
969
970 static int acpi_sbs_remove(struct acpi_device *device, int type)
971 {
972         struct acpi_sbs *sbs;
973         int id;
974
975         if (!device)
976                 return -EINVAL;
977         sbs = acpi_driver_data(device);
978         if (!sbs)
979                 return -EINVAL;
980         mutex_lock(&sbs->lock);
981         acpi_smbus_unregister_callback(sbs->hc);
982         for (id = 0; id < MAX_SBS_BAT; ++id)
983                 acpi_battery_remove(sbs, id);
984         acpi_charger_remove(sbs);
985         mutex_unlock(&sbs->lock);
986         mutex_destroy(&sbs->lock);
987         kfree(sbs);
988         return 0;
989 }
990
991 static void acpi_sbs_rmdirs(void)
992 {
993 #ifdef CONFIG_ACPI_PROCFS_POWER
994         if (acpi_ac_dir) {
995                 acpi_unlock_ac_dir(acpi_ac_dir);
996                 acpi_ac_dir = NULL;
997         }
998         if (acpi_battery_dir) {
999                 acpi_unlock_battery_dir(acpi_battery_dir);
1000                 acpi_battery_dir = NULL;
1001         }
1002 #endif
1003 }
1004
1005 static int acpi_sbs_resume(struct acpi_device *device)
1006 {
1007         struct acpi_sbs *sbs;
1008         if (!device)
1009                 return -EINVAL;
1010         sbs = device->driver_data;
1011         acpi_sbs_callback(sbs);
1012         return 0;
1013 }
1014
1015 static struct acpi_driver acpi_sbs_driver = {
1016         .name = "sbs",
1017         .class = ACPI_SBS_CLASS,
1018         .ids = sbs_device_ids,
1019         .ops = {
1020                 .add = acpi_sbs_add,
1021                 .remove = acpi_sbs_remove,
1022                 .resume = acpi_sbs_resume,
1023                 },
1024 };
1025
1026 static int __init acpi_sbs_init(void)
1027 {
1028         int result = 0;
1029
1030         if (acpi_disabled)
1031                 return -ENODEV;
1032 #ifdef CONFIG_ACPI_PROCFS_POWER
1033         acpi_ac_dir = acpi_lock_ac_dir();
1034         if (!acpi_ac_dir)
1035                 return -ENODEV;
1036         acpi_battery_dir = acpi_lock_battery_dir();
1037         if (!acpi_battery_dir) {
1038                 acpi_sbs_rmdirs();
1039                 return -ENODEV;
1040         }
1041 #endif
1042         result = acpi_bus_register_driver(&acpi_sbs_driver);
1043         if (result < 0) {
1044                 acpi_sbs_rmdirs();
1045                 return -ENODEV;
1046         }
1047         return 0;
1048 }
1049
1050 static void __exit acpi_sbs_exit(void)
1051 {
1052         acpi_bus_unregister_driver(&acpi_sbs_driver);
1053         acpi_sbs_rmdirs();
1054         return;
1055 }
1056
1057 module_init(acpi_sbs_init);
1058 module_exit(acpi_sbs_exit);