Merge branches 'battery-2.6.34', 'bugzilla-10805', 'bugzilla-14668', 'bugzilla-531916...
[linux-2.6.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/module.h>
29 #include <linux/moduleparam.h>
30 #include <linux/kernel.h>
31
32 #ifdef CONFIG_ACPI_PROCFS_POWER
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <asm/uaccess.h>
36 #endif
37
38 #include <linux/acpi.h>
39 #include <linux/timer.h>
40 #include <linux/jiffies.h>
41 #include <linux/delay.h>
42
43 #ifdef CONFIG_ACPI_SYSFS_POWER
44 #include <linux/power_supply.h>
45 #endif
46
47 #include "sbshc.h"
48
49 #define PREFIX "ACPI: "
50
51 #define ACPI_SBS_CLASS                  "sbs"
52 #define ACPI_AC_CLASS                   "ac_adapter"
53 #define ACPI_BATTERY_CLASS              "battery"
54 #define ACPI_SBS_DEVICE_NAME            "Smart Battery System"
55 #define ACPI_SBS_FILE_INFO              "info"
56 #define ACPI_SBS_FILE_STATE             "state"
57 #define ACPI_SBS_FILE_ALARM             "alarm"
58 #define ACPI_BATTERY_DIR_NAME           "BAT%i"
59 #define ACPI_AC_DIR_NAME                "AC0"
60
61 #define ACPI_SBS_NOTIFY_STATUS          0x80
62 #define ACPI_SBS_NOTIFY_INFO            0x81
63
64 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
65 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
66 MODULE_LICENSE("GPL");
67
68 static unsigned int cache_time = 1000;
69 module_param(cache_time, uint, 0644);
70 MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
71
72 extern struct proc_dir_entry *acpi_lock_ac_dir(void);
73 extern struct proc_dir_entry *acpi_lock_battery_dir(void);
74 extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
75 extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
76
77 #define MAX_SBS_BAT                     4
78 #define ACPI_SBS_BLOCK_MAX              32
79
80 static const struct acpi_device_id sbs_device_ids[] = {
81         {"ACPI0002", 0},
82         {"", 0},
83 };
84 MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
85
86 struct acpi_battery {
87 #ifdef CONFIG_ACPI_SYSFS_POWER
88         struct power_supply bat;
89 #endif
90         struct acpi_sbs *sbs;
91 #ifdef CONFIG_ACPI_PROCFS_POWER
92         struct proc_dir_entry *proc_entry;
93 #endif
94         unsigned long update_time;
95         char name[8];
96         char manufacturer_name[ACPI_SBS_BLOCK_MAX];
97         char device_name[ACPI_SBS_BLOCK_MAX];
98         char device_chemistry[ACPI_SBS_BLOCK_MAX];
99         u16 alarm_capacity;
100         u16 full_charge_capacity;
101         u16 design_capacity;
102         u16 design_voltage;
103         u16 serial_number;
104         u16 cycle_count;
105         u16 temp_now;
106         u16 voltage_now;
107         s16 rate_now;
108         s16 rate_avg;
109         u16 capacity_now;
110         u16 state_of_charge;
111         u16 state;
112         u16 mode;
113         u16 spec;
114         u8 id;
115         u8 present:1;
116         u8 have_sysfs_alarm:1;
117 };
118
119 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
120
121 struct acpi_sbs {
122 #ifdef CONFIG_ACPI_SYSFS_POWER
123         struct power_supply charger;
124 #endif
125         struct acpi_device *device;
126         struct acpi_smb_hc *hc;
127         struct mutex lock;
128 #ifdef CONFIG_ACPI_PROCFS_POWER
129         struct proc_dir_entry *charger_entry;
130 #endif
131         struct acpi_battery battery[MAX_SBS_BAT];
132         u8 batteries_supported:4;
133         u8 manager_present:1;
134         u8 charger_present:1;
135 };
136
137 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
138
139 static inline int battery_scale(int log)
140 {
141         int scale = 1;
142         while (log--)
143                 scale *= 10;
144         return scale;
145 }
146
147 static inline int acpi_battery_vscale(struct acpi_battery *battery)
148 {
149         return battery_scale((battery->spec & 0x0f00) >> 8);
150 }
151
152 static inline int acpi_battery_ipscale(struct acpi_battery *battery)
153 {
154         return battery_scale((battery->spec & 0xf000) >> 12);
155 }
156
157 static inline int acpi_battery_mode(struct acpi_battery *battery)
158 {
159         return (battery->mode & 0x8000);
160 }
161
162 static inline int acpi_battery_scale(struct acpi_battery *battery)
163 {
164         return (acpi_battery_mode(battery) ? 10 : 1) *
165             acpi_battery_ipscale(battery);
166 }
167
168 #ifdef CONFIG_ACPI_SYSFS_POWER
169 static int sbs_get_ac_property(struct power_supply *psy,
170                                enum power_supply_property psp,
171                                union power_supply_propval *val)
172 {
173         struct acpi_sbs *sbs = to_acpi_sbs(psy);
174         switch (psp) {
175         case POWER_SUPPLY_PROP_ONLINE:
176                 val->intval = sbs->charger_present;
177                 break;
178         default:
179                 return -EINVAL;
180         }
181         return 0;
182 }
183
184 static int acpi_battery_technology(struct acpi_battery *battery)
185 {
186         if (!strcasecmp("NiCd", battery->device_chemistry))
187                 return POWER_SUPPLY_TECHNOLOGY_NiCd;
188         if (!strcasecmp("NiMH", battery->device_chemistry))
189                 return POWER_SUPPLY_TECHNOLOGY_NiMH;
190         if (!strcasecmp("LION", battery->device_chemistry))
191                 return POWER_SUPPLY_TECHNOLOGY_LION;
192         if (!strcasecmp("LiP", battery->device_chemistry))
193                 return POWER_SUPPLY_TECHNOLOGY_LIPO;
194         return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
195 }
196
197 static int acpi_sbs_battery_get_property(struct power_supply *psy,
198                                          enum power_supply_property psp,
199                                          union power_supply_propval *val)
200 {
201         struct acpi_battery *battery = to_acpi_battery(psy);
202
203         if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
204                 return -ENODEV;
205         switch (psp) {
206         case POWER_SUPPLY_PROP_STATUS:
207                 if (battery->rate_now < 0)
208                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
209                 else if (battery->rate_now > 0)
210                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
211                 else
212                         val->intval = POWER_SUPPLY_STATUS_FULL;
213                 break;
214         case POWER_SUPPLY_PROP_PRESENT:
215                 val->intval = battery->present;
216                 break;
217         case POWER_SUPPLY_PROP_TECHNOLOGY:
218                 val->intval = acpi_battery_technology(battery);
219                 break;
220         case POWER_SUPPLY_PROP_CYCLE_COUNT:
221                 val->intval = battery->cycle_count;
222                 break;
223         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
224                 val->intval = battery->design_voltage *
225                         acpi_battery_vscale(battery) * 1000;
226                 break;
227         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
228                 val->intval = battery->voltage_now *
229                                 acpi_battery_vscale(battery) * 1000;
230                 break;
231         case POWER_SUPPLY_PROP_CURRENT_NOW:
232         case POWER_SUPPLY_PROP_POWER_NOW:
233                 val->intval = abs(battery->rate_now) *
234                                 acpi_battery_ipscale(battery) * 1000;
235                 break;
236         case POWER_SUPPLY_PROP_CURRENT_AVG:
237         case POWER_SUPPLY_PROP_POWER_AVG:
238                 val->intval = abs(battery->rate_avg) *
239                                 acpi_battery_ipscale(battery) * 1000;
240                 break;
241         case POWER_SUPPLY_PROP_CAPACITY:
242                 val->intval = battery->state_of_charge;
243                 break;
244         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
245         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
246                 val->intval = battery->design_capacity *
247                         acpi_battery_scale(battery) * 1000;
248                 break;
249         case POWER_SUPPLY_PROP_CHARGE_FULL:
250         case POWER_SUPPLY_PROP_ENERGY_FULL:
251                 val->intval = battery->full_charge_capacity *
252                         acpi_battery_scale(battery) * 1000;
253                 break;
254         case POWER_SUPPLY_PROP_CHARGE_NOW:
255         case POWER_SUPPLY_PROP_ENERGY_NOW:
256                 val->intval = battery->capacity_now *
257                                 acpi_battery_scale(battery) * 1000;
258                 break;
259         case POWER_SUPPLY_PROP_TEMP:
260                 val->intval = battery->temp_now - 2730; // dK -> dC
261                 break;
262         case POWER_SUPPLY_PROP_MODEL_NAME:
263                 val->strval = battery->device_name;
264                 break;
265         case POWER_SUPPLY_PROP_MANUFACTURER:
266                 val->strval = battery->manufacturer_name;
267                 break;
268         default:
269                 return -EINVAL;
270         }
271         return 0;
272 }
273
274 static enum power_supply_property sbs_ac_props[] = {
275         POWER_SUPPLY_PROP_ONLINE,
276 };
277
278 static enum power_supply_property sbs_charge_battery_props[] = {
279         POWER_SUPPLY_PROP_STATUS,
280         POWER_SUPPLY_PROP_PRESENT,
281         POWER_SUPPLY_PROP_TECHNOLOGY,
282         POWER_SUPPLY_PROP_CYCLE_COUNT,
283         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
284         POWER_SUPPLY_PROP_VOLTAGE_NOW,
285         POWER_SUPPLY_PROP_CURRENT_NOW,
286         POWER_SUPPLY_PROP_CURRENT_AVG,
287         POWER_SUPPLY_PROP_CAPACITY,
288         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
289         POWER_SUPPLY_PROP_CHARGE_FULL,
290         POWER_SUPPLY_PROP_CHARGE_NOW,
291         POWER_SUPPLY_PROP_TEMP,
292         POWER_SUPPLY_PROP_MODEL_NAME,
293         POWER_SUPPLY_PROP_MANUFACTURER,
294 };
295
296 static enum power_supply_property sbs_energy_battery_props[] = {
297         POWER_SUPPLY_PROP_STATUS,
298         POWER_SUPPLY_PROP_PRESENT,
299         POWER_SUPPLY_PROP_TECHNOLOGY,
300         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
301         POWER_SUPPLY_PROP_VOLTAGE_NOW,
302         POWER_SUPPLY_PROP_CURRENT_NOW,
303         POWER_SUPPLY_PROP_CURRENT_AVG,
304         POWER_SUPPLY_PROP_POWER_NOW,
305         POWER_SUPPLY_PROP_POWER_AVG,
306         POWER_SUPPLY_PROP_CAPACITY,
307         POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
308         POWER_SUPPLY_PROP_ENERGY_FULL,
309         POWER_SUPPLY_PROP_ENERGY_NOW,
310         POWER_SUPPLY_PROP_TEMP,
311         POWER_SUPPLY_PROP_MODEL_NAME,
312         POWER_SUPPLY_PROP_MANUFACTURER,
313 };
314
315 #endif
316
317 /* --------------------------------------------------------------------------
318                             Smart Battery System Management
319    -------------------------------------------------------------------------- */
320
321 struct acpi_battery_reader {
322         u8 command;             /* command for battery */
323         u8 mode;                /* word or block? */
324         size_t offset;          /* offset inside struct acpi_sbs_battery */
325 };
326
327 static struct acpi_battery_reader info_readers[] = {
328         {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
329         {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
330         {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
331         {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
332         {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
333         {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
334         {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
335         {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
336         {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
337         {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
338         {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
339 };
340
341 static struct acpi_battery_reader state_readers[] = {
342         {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
343         {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
344         {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
345         {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
346         {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
347         {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
348         {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
349 };
350
351 static int acpi_manager_get_info(struct acpi_sbs *sbs)
352 {
353         int result = 0;
354         u16 battery_system_info;
355
356         result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
357                                  0x04, (u8 *)&battery_system_info);
358         if (!result)
359                 sbs->batteries_supported = battery_system_info & 0x000f;
360         return result;
361 }
362
363 static int acpi_battery_get_info(struct acpi_battery *battery)
364 {
365         int i, result = 0;
366
367         for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
368                 result = acpi_smbus_read(battery->sbs->hc,
369                                          info_readers[i].mode,
370                                          ACPI_SBS_BATTERY,
371                                          info_readers[i].command,
372                                          (u8 *) battery +
373                                                 info_readers[i].offset);
374                 if (result)
375                         break;
376         }
377         return result;
378 }
379
380 static int acpi_battery_get_state(struct acpi_battery *battery)
381 {
382         int i, result = 0;
383
384         if (battery->update_time &&
385             time_before(jiffies, battery->update_time +
386                                 msecs_to_jiffies(cache_time)))
387                 return 0;
388         for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
389                 result = acpi_smbus_read(battery->sbs->hc,
390                                          state_readers[i].mode,
391                                          ACPI_SBS_BATTERY,
392                                          state_readers[i].command,
393                                          (u8 *)battery +
394                                                 state_readers[i].offset);
395                 if (result)
396                         goto end;
397         }
398       end:
399         battery->update_time = jiffies;
400         return result;
401 }
402
403 static int acpi_battery_get_alarm(struct acpi_battery *battery)
404 {
405         return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
406                                  ACPI_SBS_BATTERY, 0x01,
407                                  (u8 *)&battery->alarm_capacity);
408 }
409
410 static int acpi_battery_set_alarm(struct acpi_battery *battery)
411 {
412         struct acpi_sbs *sbs = battery->sbs;
413         u16 value, sel = 1 << (battery->id + 12);
414
415         int ret;
416
417
418         if (sbs->manager_present) {
419                 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
420                                 0x01, (u8 *)&value);
421                 if (ret)
422                         goto end;
423                 if ((value & 0xf000) != sel) {
424                         value &= 0x0fff;
425                         value |= sel;
426                 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
427                                          ACPI_SBS_MANAGER,
428                                          0x01, (u8 *)&value, 2);
429                 if (ret)
430                         goto end;
431                 }
432         }
433         ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
434                                 0x01, (u8 *)&battery->alarm_capacity, 2);
435       end:
436         return ret;
437 }
438
439 static int acpi_ac_get_present(struct acpi_sbs *sbs)
440 {
441         int result;
442         u16 status;
443
444         result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
445                                  0x13, (u8 *) & status);
446         if (!result)
447                 sbs->charger_present = (status >> 15) & 0x1;
448         return result;
449 }
450
451 #ifdef CONFIG_ACPI_SYSFS_POWER
452 static ssize_t acpi_battery_alarm_show(struct device *dev,
453                                         struct device_attribute *attr,
454                                         char *buf)
455 {
456         struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
457         acpi_battery_get_alarm(battery);
458         return sprintf(buf, "%d\n", battery->alarm_capacity *
459                                 acpi_battery_scale(battery) * 1000);
460 }
461
462 static ssize_t acpi_battery_alarm_store(struct device *dev,
463                                         struct device_attribute *attr,
464                                         const char *buf, size_t count)
465 {
466         unsigned long x;
467         struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
468         if (sscanf(buf, "%ld\n", &x) == 1)
469                 battery->alarm_capacity = x /
470                         (1000 * acpi_battery_scale(battery));
471         if (battery->present)
472                 acpi_battery_set_alarm(battery);
473         return count;
474 }
475
476 static struct device_attribute alarm_attr = {
477         .attr = {.name = "alarm", .mode = 0644},
478         .show = acpi_battery_alarm_show,
479         .store = acpi_battery_alarm_store,
480 };
481 #endif
482
483 /* --------------------------------------------------------------------------
484                               FS Interface (/proc/acpi)
485    -------------------------------------------------------------------------- */
486
487 #ifdef CONFIG_ACPI_PROCFS_POWER
488 /* Generic Routines */
489 static int
490 acpi_sbs_add_fs(struct proc_dir_entry **dir,
491                 struct proc_dir_entry *parent_dir,
492                 char *dir_name,
493                 const struct file_operations *info_fops,
494                 const struct file_operations *state_fops,
495                 const struct file_operations *alarm_fops, void *data)
496 {
497         if (!*dir) {
498                 *dir = proc_mkdir(dir_name, parent_dir);
499                 if (!*dir) {
500                         return -ENODEV;
501                 }
502         }
503
504         /* 'info' [R] */
505         if (info_fops)
506                 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
507                                  info_fops, data);
508
509         /* 'state' [R] */
510         if (state_fops)
511                 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
512                                  state_fops, data);
513
514         /* 'alarm' [R/W] */
515         if (alarm_fops)
516                 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
517                                  alarm_fops, data);
518         return 0;
519 }
520
521 static void
522 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
523                            struct proc_dir_entry *parent_dir)
524 {
525         if (*dir) {
526                 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
527                 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
528                 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
529                 remove_proc_entry((*dir)->name, parent_dir);
530                 *dir = NULL;
531         }
532 }
533
534 /* Smart Battery Interface */
535 static struct proc_dir_entry *acpi_battery_dir = NULL;
536
537 static inline char *acpi_battery_units(struct acpi_battery *battery)
538 {
539         return acpi_battery_mode(battery) ? " mW" : " mA";
540 }
541
542
543 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
544 {
545         struct acpi_battery *battery = seq->private;
546         struct acpi_sbs *sbs = battery->sbs;
547         int result = 0;
548
549         mutex_lock(&sbs->lock);
550
551         seq_printf(seq, "present:                 %s\n",
552                    (battery->present) ? "yes" : "no");
553         if (!battery->present)
554                 goto end;
555
556         seq_printf(seq, "design capacity:         %i%sh\n",
557                    battery->design_capacity * acpi_battery_scale(battery),
558                    acpi_battery_units(battery));
559         seq_printf(seq, "last full capacity:      %i%sh\n",
560                    battery->full_charge_capacity * acpi_battery_scale(battery),
561                    acpi_battery_units(battery));
562         seq_printf(seq, "battery technology:      rechargeable\n");
563         seq_printf(seq, "design voltage:          %i mV\n",
564                    battery->design_voltage * acpi_battery_vscale(battery));
565         seq_printf(seq, "design capacity warning: unknown\n");
566         seq_printf(seq, "design capacity low:     unknown\n");
567         seq_printf(seq, "cycle count:             %i\n", battery->cycle_count);
568         seq_printf(seq, "capacity granularity 1:  unknown\n");
569         seq_printf(seq, "capacity granularity 2:  unknown\n");
570         seq_printf(seq, "model number:            %s\n", battery->device_name);
571         seq_printf(seq, "serial number:           %i\n",
572                    battery->serial_number);
573         seq_printf(seq, "battery type:            %s\n",
574                    battery->device_chemistry);
575         seq_printf(seq, "OEM info:                %s\n",
576                    battery->manufacturer_name);
577       end:
578         mutex_unlock(&sbs->lock);
579         return result;
580 }
581
582 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
583 {
584         return single_open(file, acpi_battery_read_info, PDE(inode)->data);
585 }
586
587 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
588 {
589         struct acpi_battery *battery = seq->private;
590         struct acpi_sbs *sbs = battery->sbs;
591         int rate;
592
593         mutex_lock(&sbs->lock);
594         seq_printf(seq, "present:                 %s\n",
595                    (battery->present) ? "yes" : "no");
596         if (!battery->present)
597                 goto end;
598
599         acpi_battery_get_state(battery);
600         seq_printf(seq, "capacity state:          %s\n",
601                    (battery->state & 0x0010) ? "critical" : "ok");
602         seq_printf(seq, "charging state:          %s\n",
603                    (battery->rate_now < 0) ? "discharging" :
604                    ((battery->rate_now > 0) ? "charging" : "charged"));
605         rate = abs(battery->rate_now) * acpi_battery_ipscale(battery);
606         rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
607                         acpi_battery_vscale(battery)/1000):1;
608         seq_printf(seq, "present rate:            %d%s\n", rate,
609                    acpi_battery_units(battery));
610         seq_printf(seq, "remaining capacity:      %i%sh\n",
611                    battery->capacity_now * acpi_battery_scale(battery),
612                    acpi_battery_units(battery));
613         seq_printf(seq, "present voltage:         %i mV\n",
614                    battery->voltage_now * acpi_battery_vscale(battery));
615
616       end:
617         mutex_unlock(&sbs->lock);
618         return 0;
619 }
620
621 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
622 {
623         return single_open(file, acpi_battery_read_state, PDE(inode)->data);
624 }
625
626 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
627 {
628         struct acpi_battery *battery = seq->private;
629         struct acpi_sbs *sbs = battery->sbs;
630         int result = 0;
631
632         mutex_lock(&sbs->lock);
633
634         if (!battery->present) {
635                 seq_printf(seq, "present:                 no\n");
636                 goto end;
637         }
638
639         acpi_battery_get_alarm(battery);
640         seq_printf(seq, "alarm:                   ");
641         if (battery->alarm_capacity)
642                 seq_printf(seq, "%i%sh\n",
643                            battery->alarm_capacity *
644                            acpi_battery_scale(battery),
645                            acpi_battery_units(battery));
646         else
647                 seq_printf(seq, "disabled\n");
648       end:
649         mutex_unlock(&sbs->lock);
650         return result;
651 }
652
653 static ssize_t
654 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
655                          size_t count, loff_t * ppos)
656 {
657         struct seq_file *seq = file->private_data;
658         struct acpi_battery *battery = seq->private;
659         struct acpi_sbs *sbs = battery->sbs;
660         char alarm_string[12] = { '\0' };
661         int result = 0;
662         mutex_lock(&sbs->lock);
663         if (!battery->present) {
664                 result = -ENODEV;
665                 goto end;
666         }
667         if (count > sizeof(alarm_string) - 1) {
668                 result = -EINVAL;
669                 goto end;
670         }
671         if (copy_from_user(alarm_string, buffer, count)) {
672                 result = -EFAULT;
673                 goto end;
674         }
675         alarm_string[count] = 0;
676         battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
677                                         acpi_battery_scale(battery);
678         acpi_battery_set_alarm(battery);
679       end:
680         mutex_unlock(&sbs->lock);
681         if (result)
682                 return result;
683         return count;
684 }
685
686 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
687 {
688         return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
689 }
690
691 static const struct file_operations acpi_battery_info_fops = {
692         .open = acpi_battery_info_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_state_fops = {
700         .open = acpi_battery_state_open_fs,
701         .read = seq_read,
702         .llseek = seq_lseek,
703         .release = single_release,
704         .owner = THIS_MODULE,
705 };
706
707 static const struct file_operations acpi_battery_alarm_fops = {
708         .open = acpi_battery_alarm_open_fs,
709         .read = seq_read,
710         .write = acpi_battery_write_alarm,
711         .llseek = seq_lseek,
712         .release = single_release,
713         .owner = THIS_MODULE,
714 };
715
716 /* Legacy AC Adapter Interface */
717
718 static struct proc_dir_entry *acpi_ac_dir = NULL;
719
720 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
721 {
722
723         struct acpi_sbs *sbs = seq->private;
724
725         mutex_lock(&sbs->lock);
726
727         seq_printf(seq, "state:                   %s\n",
728                    sbs->charger_present ? "on-line" : "off-line");
729
730         mutex_unlock(&sbs->lock);
731         return 0;
732 }
733
734 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
735 {
736         return single_open(file, acpi_ac_read_state, PDE(inode)->data);
737 }
738
739 static const struct file_operations acpi_ac_state_fops = {
740         .open = acpi_ac_state_open_fs,
741         .read = seq_read,
742         .llseek = seq_lseek,
743         .release = single_release,
744         .owner = THIS_MODULE,
745 };
746
747 #endif
748
749 /* --------------------------------------------------------------------------
750                                  Driver Interface
751    -------------------------------------------------------------------------- */
752 static int acpi_battery_read(struct acpi_battery *battery)
753 {
754         int result = 0, saved_present = battery->present;
755         u16 state;
756
757         if (battery->sbs->manager_present) {
758                 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
759                                 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
760                 if (!result)
761                         battery->present = state & (1 << battery->id);
762                 state &= 0x0fff;
763                 state |= 1 << (battery->id + 12);
764                 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
765                                   ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
766         } else if (battery->id == 0)
767                 battery->present = 1;
768         if (result || !battery->present)
769                 return result;
770
771         if (saved_present != battery->present) {
772                 battery->update_time = 0;
773                 result = acpi_battery_get_info(battery);
774                 if (result)
775                         return result;
776         }
777         result = acpi_battery_get_state(battery);
778         return result;
779 }
780
781 /* Smart Battery */
782 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
783 {
784         struct acpi_battery *battery = &sbs->battery[id];
785         int result;
786
787         battery->id = id;
788         battery->sbs = sbs;
789         result = acpi_battery_read(battery);
790         if (result)
791                 return result;
792
793         sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
794 #ifdef CONFIG_ACPI_PROCFS_POWER
795         acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
796                         battery->name, &acpi_battery_info_fops,
797                         &acpi_battery_state_fops, &acpi_battery_alarm_fops,
798                         battery);
799 #endif
800 #ifdef CONFIG_ACPI_SYSFS_POWER
801         battery->bat.name = battery->name;
802         battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
803         if (!acpi_battery_mode(battery)) {
804                 battery->bat.properties = sbs_charge_battery_props;
805                 battery->bat.num_properties =
806                     ARRAY_SIZE(sbs_charge_battery_props);
807         } else {
808                 battery->bat.properties = sbs_energy_battery_props;
809                 battery->bat.num_properties =
810                     ARRAY_SIZE(sbs_energy_battery_props);
811         }
812         battery->bat.get_property = acpi_sbs_battery_get_property;
813         result = power_supply_register(&sbs->device->dev, &battery->bat);
814         if (result)
815                 goto end;
816         result = device_create_file(battery->bat.dev, &alarm_attr);
817         if (result)
818                 goto end;
819         battery->have_sysfs_alarm = 1;
820       end:
821 #endif
822         printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
823                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
824                battery->name, battery->present ? "present" : "absent");
825         return result;
826 }
827
828 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
829 {
830 #if defined(CONFIG_ACPI_SYSFS_POWER) || defined(CONFIG_ACPI_PROCFS_POWER)
831         struct acpi_battery *battery = &sbs->battery[id];
832 #endif
833
834 #ifdef CONFIG_ACPI_SYSFS_POWER
835         if (battery->bat.dev) {
836                 if (battery->have_sysfs_alarm)
837                         device_remove_file(battery->bat.dev, &alarm_attr);
838                 power_supply_unregister(&battery->bat);
839         }
840 #endif
841 #ifdef CONFIG_ACPI_PROCFS_POWER
842         if (battery->proc_entry)
843                 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
844 #endif
845 }
846
847 static int acpi_charger_add(struct acpi_sbs *sbs)
848 {
849         int result;
850
851         result = acpi_ac_get_present(sbs);
852         if (result)
853                 goto end;
854 #ifdef CONFIG_ACPI_PROCFS_POWER
855         result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
856                                  ACPI_AC_DIR_NAME, NULL,
857                                  &acpi_ac_state_fops, NULL, sbs);
858         if (result)
859                 goto end;
860 #endif
861 #ifdef CONFIG_ACPI_SYSFS_POWER
862         sbs->charger.name = "sbs-charger";
863         sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
864         sbs->charger.properties = sbs_ac_props;
865         sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
866         sbs->charger.get_property = sbs_get_ac_property;
867         power_supply_register(&sbs->device->dev, &sbs->charger);
868 #endif
869         printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
870                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
871                ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
872       end:
873         return result;
874 }
875
876 static void acpi_charger_remove(struct acpi_sbs *sbs)
877 {
878 #ifdef CONFIG_ACPI_SYSFS_POWER
879         if (sbs->charger.dev)
880                 power_supply_unregister(&sbs->charger);
881 #endif
882 #ifdef CONFIG_ACPI_PROCFS_POWER
883         if (sbs->charger_entry)
884                 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
885 #endif
886 }
887
888 static void acpi_sbs_callback(void *context)
889 {
890         int id;
891         struct acpi_sbs *sbs = context;
892         struct acpi_battery *bat;
893         u8 saved_charger_state = sbs->charger_present;
894         u8 saved_battery_state;
895         acpi_ac_get_present(sbs);
896         if (sbs->charger_present != saved_charger_state) {
897 #ifdef CONFIG_ACPI_PROC_EVENT
898                 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
899                                               ACPI_SBS_NOTIFY_STATUS,
900                                               sbs->charger_present);
901 #endif
902 #ifdef CONFIG_ACPI_SYSFS_POWER
903                 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
904 #endif
905         }
906         if (sbs->manager_present) {
907                 for (id = 0; id < MAX_SBS_BAT; ++id) {
908                         if (!(sbs->batteries_supported & (1 << id)))
909                                 continue;
910                         bat = &sbs->battery[id];
911                         saved_battery_state = bat->present;
912                         acpi_battery_read(bat);
913                         if (saved_battery_state == bat->present)
914                                 continue;
915 #ifdef CONFIG_ACPI_PROC_EVENT
916                         acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
917                                                       bat->name,
918                                                       ACPI_SBS_NOTIFY_STATUS,
919                                                       bat->present);
920 #endif
921 #ifdef CONFIG_ACPI_SYSFS_POWER
922                         kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
923 #endif
924                 }
925         }
926 }
927
928 static int acpi_sbs_remove(struct acpi_device *device, int type);
929
930 static int acpi_sbs_add(struct acpi_device *device)
931 {
932         struct acpi_sbs *sbs;
933         int result = 0;
934         int id;
935
936         sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
937         if (!sbs) {
938                 result = -ENOMEM;
939                 goto end;
940         }
941
942         mutex_init(&sbs->lock);
943
944         sbs->hc = acpi_driver_data(device->parent);
945         sbs->device = device;
946         strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
947         strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
948         device->driver_data = sbs;
949
950         result = acpi_charger_add(sbs);
951         if (result)
952                 goto end;
953
954         result = acpi_manager_get_info(sbs);
955         if (!result) {
956                 sbs->manager_present = 1;
957                 for (id = 0; id < MAX_SBS_BAT; ++id)
958                         if ((sbs->batteries_supported & (1 << id)))
959                                 acpi_battery_add(sbs, id);
960         } else
961                 acpi_battery_add(sbs, 0);
962         acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
963       end:
964         if (result)
965                 acpi_sbs_remove(device, 0);
966         return result;
967 }
968
969 static int acpi_sbs_remove(struct acpi_device *device, int type)
970 {
971         struct acpi_sbs *sbs;
972         int id;
973
974         if (!device)
975                 return -EINVAL;
976         sbs = acpi_driver_data(device);
977         if (!sbs)
978                 return -EINVAL;
979         mutex_lock(&sbs->lock);
980         acpi_smbus_unregister_callback(sbs->hc);
981         for (id = 0; id < MAX_SBS_BAT; ++id)
982                 acpi_battery_remove(sbs, id);
983         acpi_charger_remove(sbs);
984         mutex_unlock(&sbs->lock);
985         mutex_destroy(&sbs->lock);
986         kfree(sbs);
987         return 0;
988 }
989
990 static void acpi_sbs_rmdirs(void)
991 {
992 #ifdef CONFIG_ACPI_PROCFS_POWER
993         if (acpi_ac_dir) {
994                 acpi_unlock_ac_dir(acpi_ac_dir);
995                 acpi_ac_dir = NULL;
996         }
997         if (acpi_battery_dir) {
998                 acpi_unlock_battery_dir(acpi_battery_dir);
999                 acpi_battery_dir = NULL;
1000         }
1001 #endif
1002 }
1003
1004 static int acpi_sbs_resume(struct acpi_device *device)
1005 {
1006         struct acpi_sbs *sbs;
1007         if (!device)
1008                 return -EINVAL;
1009         sbs = device->driver_data;
1010         acpi_sbs_callback(sbs);
1011         return 0;
1012 }
1013
1014 static struct acpi_driver acpi_sbs_driver = {
1015         .name = "sbs",
1016         .class = ACPI_SBS_CLASS,
1017         .ids = sbs_device_ids,
1018         .ops = {
1019                 .add = acpi_sbs_add,
1020                 .remove = acpi_sbs_remove,
1021                 .resume = acpi_sbs_resume,
1022                 },
1023 };
1024
1025 static int __init acpi_sbs_init(void)
1026 {
1027         int result = 0;
1028
1029         if (acpi_disabled)
1030                 return -ENODEV;
1031 #ifdef CONFIG_ACPI_PROCFS_POWER
1032         acpi_ac_dir = acpi_lock_ac_dir();
1033         if (!acpi_ac_dir)
1034                 return -ENODEV;
1035         acpi_battery_dir = acpi_lock_battery_dir();
1036         if (!acpi_battery_dir) {
1037                 acpi_sbs_rmdirs();
1038                 return -ENODEV;
1039         }
1040 #endif
1041         result = acpi_bus_register_driver(&acpi_sbs_driver);
1042         if (result < 0) {
1043                 acpi_sbs_rmdirs();
1044                 return -ENODEV;
1045         }
1046         return 0;
1047 }
1048
1049 static void __exit acpi_sbs_exit(void)
1050 {
1051         acpi_bus_unregister_driver(&acpi_sbs_driver);
1052         acpi_sbs_rmdirs();
1053         return;
1054 }
1055
1056 module_init(acpi_sbs_init);
1057 module_exit(acpi_sbs_exit);