Revert "ARM: tegra: tegratab: dummy change"
[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/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 int acpi_sbs_remove(struct acpi_device *device, int type);
134 static int acpi_battery_get_state(struct acpi_battery *battery);
135
136 static inline int battery_scale(int log)
137 {
138         int scale = 1;
139         while (log--)
140                 scale *= 10;
141         return scale;
142 }
143
144 static inline int acpi_battery_vscale(struct acpi_battery *battery)
145 {
146         return battery_scale((battery->spec & 0x0f00) >> 8);
147 }
148
149 static inline int acpi_battery_ipscale(struct acpi_battery *battery)
150 {
151         return battery_scale((battery->spec & 0xf000) >> 12);
152 }
153
154 static inline int acpi_battery_mode(struct acpi_battery *battery)
155 {
156         return (battery->mode & 0x8000);
157 }
158
159 static inline int acpi_battery_scale(struct acpi_battery *battery)
160 {
161         return (acpi_battery_mode(battery) ? 10 : 1) *
162             acpi_battery_ipscale(battery);
163 }
164
165 static int sbs_get_ac_property(struct power_supply *psy,
166                                enum power_supply_property psp,
167                                union power_supply_propval *val)
168 {
169         struct acpi_sbs *sbs = to_acpi_sbs(psy);
170         switch (psp) {
171         case POWER_SUPPLY_PROP_ONLINE:
172                 val->intval = sbs->charger_present;
173                 break;
174         default:
175                 return -EINVAL;
176         }
177         return 0;
178 }
179
180 static int acpi_battery_technology(struct acpi_battery *battery)
181 {
182         if (!strcasecmp("NiCd", battery->device_chemistry))
183                 return POWER_SUPPLY_TECHNOLOGY_NiCd;
184         if (!strcasecmp("NiMH", battery->device_chemistry))
185                 return POWER_SUPPLY_TECHNOLOGY_NiMH;
186         if (!strcasecmp("LION", battery->device_chemistry))
187                 return POWER_SUPPLY_TECHNOLOGY_LION;
188         if (!strcasecmp("LiP", battery->device_chemistry))
189                 return POWER_SUPPLY_TECHNOLOGY_LIPO;
190         return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
191 }
192
193 static int acpi_sbs_battery_get_property(struct power_supply *psy,
194                                          enum power_supply_property psp,
195                                          union power_supply_propval *val)
196 {
197         struct acpi_battery *battery = to_acpi_battery(psy);
198
199         if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
200                 return -ENODEV;
201
202         acpi_battery_get_state(battery);
203         switch (psp) {
204         case POWER_SUPPLY_PROP_STATUS:
205                 if (battery->rate_now < 0)
206                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
207                 else if (battery->rate_now > 0)
208                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
209                 else
210                         val->intval = POWER_SUPPLY_STATUS_FULL;
211                 break;
212         case POWER_SUPPLY_PROP_PRESENT:
213                 val->intval = battery->present;
214                 break;
215         case POWER_SUPPLY_PROP_TECHNOLOGY:
216                 val->intval = acpi_battery_technology(battery);
217                 break;
218         case POWER_SUPPLY_PROP_CYCLE_COUNT:
219                 val->intval = battery->cycle_count;
220                 break;
221         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
222                 val->intval = battery->design_voltage *
223                         acpi_battery_vscale(battery) * 1000;
224                 break;
225         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
226                 val->intval = battery->voltage_now *
227                                 acpi_battery_vscale(battery) * 1000;
228                 break;
229         case POWER_SUPPLY_PROP_CURRENT_NOW:
230         case POWER_SUPPLY_PROP_POWER_NOW:
231                 val->intval = abs(battery->rate_now) *
232                                 acpi_battery_ipscale(battery) * 1000;
233                 val->intval *= (acpi_battery_mode(battery)) ?
234                                 (battery->voltage_now *
235                                 acpi_battery_vscale(battery) / 1000) : 1;
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                 val->intval *= (acpi_battery_mode(battery)) ?
242                                 (battery->voltage_now *
243                                 acpi_battery_vscale(battery) / 1000) : 1;
244                 break;
245         case POWER_SUPPLY_PROP_CAPACITY:
246                 val->intval = battery->state_of_charge;
247                 break;
248         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
249         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
250                 val->intval = battery->design_capacity *
251                         acpi_battery_scale(battery) * 1000;
252                 break;
253         case POWER_SUPPLY_PROP_CHARGE_FULL:
254         case POWER_SUPPLY_PROP_ENERGY_FULL:
255                 val->intval = battery->full_charge_capacity *
256                         acpi_battery_scale(battery) * 1000;
257                 break;
258         case POWER_SUPPLY_PROP_CHARGE_NOW:
259         case POWER_SUPPLY_PROP_ENERGY_NOW:
260                 val->intval = battery->capacity_now *
261                                 acpi_battery_scale(battery) * 1000;
262                 break;
263         case POWER_SUPPLY_PROP_TEMP:
264                 val->intval = battery->temp_now - 2730; // dK -> dC
265                 break;
266         case POWER_SUPPLY_PROP_MODEL_NAME:
267                 val->strval = battery->device_name;
268                 break;
269         case POWER_SUPPLY_PROP_MANUFACTURER:
270                 val->strval = battery->manufacturer_name;
271                 break;
272         default:
273                 return -EINVAL;
274         }
275         return 0;
276 }
277
278 static enum power_supply_property sbs_ac_props[] = {
279         POWER_SUPPLY_PROP_ONLINE,
280 };
281
282 static enum power_supply_property sbs_charge_battery_props[] = {
283         POWER_SUPPLY_PROP_STATUS,
284         POWER_SUPPLY_PROP_PRESENT,
285         POWER_SUPPLY_PROP_TECHNOLOGY,
286         POWER_SUPPLY_PROP_CYCLE_COUNT,
287         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
288         POWER_SUPPLY_PROP_VOLTAGE_NOW,
289         POWER_SUPPLY_PROP_CURRENT_NOW,
290         POWER_SUPPLY_PROP_CURRENT_AVG,
291         POWER_SUPPLY_PROP_CAPACITY,
292         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
293         POWER_SUPPLY_PROP_CHARGE_FULL,
294         POWER_SUPPLY_PROP_CHARGE_NOW,
295         POWER_SUPPLY_PROP_TEMP,
296         POWER_SUPPLY_PROP_MODEL_NAME,
297         POWER_SUPPLY_PROP_MANUFACTURER,
298 };
299
300 static enum power_supply_property sbs_energy_battery_props[] = {
301         POWER_SUPPLY_PROP_STATUS,
302         POWER_SUPPLY_PROP_PRESENT,
303         POWER_SUPPLY_PROP_TECHNOLOGY,
304         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
305         POWER_SUPPLY_PROP_VOLTAGE_NOW,
306         POWER_SUPPLY_PROP_CURRENT_NOW,
307         POWER_SUPPLY_PROP_CURRENT_AVG,
308         POWER_SUPPLY_PROP_POWER_NOW,
309         POWER_SUPPLY_PROP_POWER_AVG,
310         POWER_SUPPLY_PROP_CAPACITY,
311         POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
312         POWER_SUPPLY_PROP_ENERGY_FULL,
313         POWER_SUPPLY_PROP_ENERGY_NOW,
314         POWER_SUPPLY_PROP_TEMP,
315         POWER_SUPPLY_PROP_MODEL_NAME,
316         POWER_SUPPLY_PROP_MANUFACTURER,
317 };
318
319
320 /* --------------------------------------------------------------------------
321                             Smart Battery System Management
322    -------------------------------------------------------------------------- */
323
324 struct acpi_battery_reader {
325         u8 command;             /* command for battery */
326         u8 mode;                /* word or block? */
327         size_t offset;          /* offset inside struct acpi_sbs_battery */
328 };
329
330 static struct acpi_battery_reader info_readers[] = {
331         {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
332         {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
333         {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
334         {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
335         {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
336         {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
337         {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
338         {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
339         {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
340         {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
341         {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
342 };
343
344 static struct acpi_battery_reader state_readers[] = {
345         {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
346         {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
347         {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
348         {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
349         {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
350         {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
351         {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
352 };
353
354 static int acpi_manager_get_info(struct acpi_sbs *sbs)
355 {
356         int result = 0;
357         u16 battery_system_info;
358
359         result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
360                                  0x04, (u8 *)&battery_system_info);
361         if (!result)
362                 sbs->batteries_supported = battery_system_info & 0x000f;
363         return result;
364 }
365
366 static int acpi_battery_get_info(struct acpi_battery *battery)
367 {
368         int i, result = 0;
369
370         for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
371                 result = acpi_smbus_read(battery->sbs->hc,
372                                          info_readers[i].mode,
373                                          ACPI_SBS_BATTERY,
374                                          info_readers[i].command,
375                                          (u8 *) battery +
376                                                 info_readers[i].offset);
377                 if (result)
378                         break;
379         }
380         return result;
381 }
382
383 static int acpi_battery_get_state(struct acpi_battery *battery)
384 {
385         int i, result = 0;
386
387         if (battery->update_time &&
388             time_before(jiffies, battery->update_time +
389                                 msecs_to_jiffies(cache_time)))
390                 return 0;
391         for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
392                 result = acpi_smbus_read(battery->sbs->hc,
393                                          state_readers[i].mode,
394                                          ACPI_SBS_BATTERY,
395                                          state_readers[i].command,
396                                          (u8 *)battery +
397                                                 state_readers[i].offset);
398                 if (result)
399                         goto end;
400         }
401       end:
402         battery->update_time = jiffies;
403         return result;
404 }
405
406 static int acpi_battery_get_alarm(struct acpi_battery *battery)
407 {
408         return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
409                                  ACPI_SBS_BATTERY, 0x01,
410                                  (u8 *)&battery->alarm_capacity);
411 }
412
413 static int acpi_battery_set_alarm(struct acpi_battery *battery)
414 {
415         struct acpi_sbs *sbs = battery->sbs;
416         u16 value, sel = 1 << (battery->id + 12);
417
418         int ret;
419
420
421         if (sbs->manager_present) {
422                 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
423                                 0x01, (u8 *)&value);
424                 if (ret)
425                         goto end;
426                 if ((value & 0xf000) != sel) {
427                         value &= 0x0fff;
428                         value |= sel;
429                 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
430                                          ACPI_SBS_MANAGER,
431                                          0x01, (u8 *)&value, 2);
432                 if (ret)
433                         goto end;
434                 }
435         }
436         ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
437                                 0x01, (u8 *)&battery->alarm_capacity, 2);
438       end:
439         return ret;
440 }
441
442 static int acpi_ac_get_present(struct acpi_sbs *sbs)
443 {
444         int result;
445         u16 status;
446
447         result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
448                                  0x13, (u8 *) & status);
449         if (!result)
450                 sbs->charger_present = (status >> 15) & 0x1;
451         return result;
452 }
453
454 static ssize_t acpi_battery_alarm_show(struct device *dev,
455                                         struct device_attribute *attr,
456                                         char *buf)
457 {
458         struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
459         acpi_battery_get_alarm(battery);
460         return sprintf(buf, "%d\n", battery->alarm_capacity *
461                                 acpi_battery_scale(battery) * 1000);
462 }
463
464 static ssize_t acpi_battery_alarm_store(struct device *dev,
465                                         struct device_attribute *attr,
466                                         const char *buf, size_t count)
467 {
468         unsigned long x;
469         struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
470         if (sscanf(buf, "%ld\n", &x) == 1)
471                 battery->alarm_capacity = x /
472                         (1000 * acpi_battery_scale(battery));
473         if (battery->present)
474                 acpi_battery_set_alarm(battery);
475         return count;
476 }
477
478 static struct device_attribute alarm_attr = {
479         .attr = {.name = "alarm", .mode = 0644},
480         .show = acpi_battery_alarm_show,
481         .store = acpi_battery_alarm_store,
482 };
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         printk(KERN_WARNING PREFIX "Deprecated procfs I/F for SBS is loaded,"
499                         " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
500         if (!*dir) {
501                 *dir = proc_mkdir(dir_name, parent_dir);
502                 if (!*dir) {
503                         return -ENODEV;
504                 }
505         }
506
507         /* 'info' [R] */
508         if (info_fops)
509                 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
510                                  info_fops, data);
511
512         /* 'state' [R] */
513         if (state_fops)
514                 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
515                                  state_fops, data);
516
517         /* 'alarm' [R/W] */
518         if (alarm_fops)
519                 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
520                                  alarm_fops, data);
521         return 0;
522 }
523
524 static void
525 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
526                            struct proc_dir_entry *parent_dir)
527 {
528         if (*dir) {
529                 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
530                 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
531                 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
532                 remove_proc_entry((*dir)->name, parent_dir);
533                 *dir = NULL;
534         }
535 }
536
537 /* Smart Battery Interface */
538 static struct proc_dir_entry *acpi_battery_dir = NULL;
539
540 static inline char *acpi_battery_units(struct acpi_battery *battery)
541 {
542         return acpi_battery_mode(battery) ? " mW" : " mA";
543 }
544
545
546 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
547 {
548         struct acpi_battery *battery = seq->private;
549         struct acpi_sbs *sbs = battery->sbs;
550         int result = 0;
551
552         mutex_lock(&sbs->lock);
553
554         seq_printf(seq, "present:                 %s\n",
555                    (battery->present) ? "yes" : "no");
556         if (!battery->present)
557                 goto end;
558
559         seq_printf(seq, "design capacity:         %i%sh\n",
560                    battery->design_capacity * acpi_battery_scale(battery),
561                    acpi_battery_units(battery));
562         seq_printf(seq, "last full capacity:      %i%sh\n",
563                    battery->full_charge_capacity * acpi_battery_scale(battery),
564                    acpi_battery_units(battery));
565         seq_printf(seq, "battery technology:      rechargeable\n");
566         seq_printf(seq, "design voltage:          %i mV\n",
567                    battery->design_voltage * acpi_battery_vscale(battery));
568         seq_printf(seq, "design capacity warning: unknown\n");
569         seq_printf(seq, "design capacity low:     unknown\n");
570         seq_printf(seq, "cycle count:             %i\n", battery->cycle_count);
571         seq_printf(seq, "capacity granularity 1:  unknown\n");
572         seq_printf(seq, "capacity granularity 2:  unknown\n");
573         seq_printf(seq, "model number:            %s\n", battery->device_name);
574         seq_printf(seq, "serial number:           %i\n",
575                    battery->serial_number);
576         seq_printf(seq, "battery type:            %s\n",
577                    battery->device_chemistry);
578         seq_printf(seq, "OEM info:                %s\n",
579                    battery->manufacturer_name);
580       end:
581         mutex_unlock(&sbs->lock);
582         return result;
583 }
584
585 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
586 {
587         return single_open(file, acpi_battery_read_info, PDE(inode)->data);
588 }
589
590 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
591 {
592         struct acpi_battery *battery = seq->private;
593         struct acpi_sbs *sbs = battery->sbs;
594         int rate;
595
596         mutex_lock(&sbs->lock);
597         seq_printf(seq, "present:                 %s\n",
598                    (battery->present) ? "yes" : "no");
599         if (!battery->present)
600                 goto end;
601
602         acpi_battery_get_state(battery);
603         seq_printf(seq, "capacity state:          %s\n",
604                    (battery->state & 0x0010) ? "critical" : "ok");
605         seq_printf(seq, "charging state:          %s\n",
606                    (battery->rate_now < 0) ? "discharging" :
607                    ((battery->rate_now > 0) ? "charging" : "charged"));
608         rate = abs(battery->rate_now) * acpi_battery_ipscale(battery);
609         rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
610                         acpi_battery_vscale(battery)/1000):1;
611         seq_printf(seq, "present rate:            %d%s\n", rate,
612                    acpi_battery_units(battery));
613         seq_printf(seq, "remaining capacity:      %i%sh\n",
614                    battery->capacity_now * acpi_battery_scale(battery),
615                    acpi_battery_units(battery));
616         seq_printf(seq, "present voltage:         %i mV\n",
617                    battery->voltage_now * acpi_battery_vscale(battery));
618
619       end:
620         mutex_unlock(&sbs->lock);
621         return 0;
622 }
623
624 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
625 {
626         return single_open(file, acpi_battery_read_state, PDE(inode)->data);
627 }
628
629 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
630 {
631         struct acpi_battery *battery = seq->private;
632         struct acpi_sbs *sbs = battery->sbs;
633         int result = 0;
634
635         mutex_lock(&sbs->lock);
636
637         if (!battery->present) {
638                 seq_printf(seq, "present:                 no\n");
639                 goto end;
640         }
641
642         acpi_battery_get_alarm(battery);
643         seq_printf(seq, "alarm:                   ");
644         if (battery->alarm_capacity)
645                 seq_printf(seq, "%i%sh\n",
646                            battery->alarm_capacity *
647                            acpi_battery_scale(battery),
648                            acpi_battery_units(battery));
649         else
650                 seq_printf(seq, "disabled\n");
651       end:
652         mutex_unlock(&sbs->lock);
653         return result;
654 }
655
656 static ssize_t
657 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
658                          size_t count, loff_t * ppos)
659 {
660         struct seq_file *seq = file->private_data;
661         struct acpi_battery *battery = seq->private;
662         struct acpi_sbs *sbs = battery->sbs;
663         char alarm_string[12] = { '\0' };
664         int result = 0;
665         mutex_lock(&sbs->lock);
666         if (!battery->present) {
667                 result = -ENODEV;
668                 goto end;
669         }
670         if (count > sizeof(alarm_string) - 1) {
671                 result = -EINVAL;
672                 goto end;
673         }
674         if (copy_from_user(alarm_string, buffer, count)) {
675                 result = -EFAULT;
676                 goto end;
677         }
678         alarm_string[count] = 0;
679         battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
680                                         acpi_battery_scale(battery);
681         acpi_battery_set_alarm(battery);
682       end:
683         mutex_unlock(&sbs->lock);
684         if (result)
685                 return result;
686         return count;
687 }
688
689 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
690 {
691         return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
692 }
693
694 static const struct file_operations acpi_battery_info_fops = {
695         .open = acpi_battery_info_open_fs,
696         .read = seq_read,
697         .llseek = seq_lseek,
698         .release = single_release,
699         .owner = THIS_MODULE,
700 };
701
702 static const struct file_operations acpi_battery_state_fops = {
703         .open = acpi_battery_state_open_fs,
704         .read = seq_read,
705         .llseek = seq_lseek,
706         .release = single_release,
707         .owner = THIS_MODULE,
708 };
709
710 static const struct file_operations acpi_battery_alarm_fops = {
711         .open = acpi_battery_alarm_open_fs,
712         .read = seq_read,
713         .write = acpi_battery_write_alarm,
714         .llseek = seq_lseek,
715         .release = single_release,
716         .owner = THIS_MODULE,
717 };
718
719 /* Legacy AC Adapter Interface */
720
721 static struct proc_dir_entry *acpi_ac_dir = NULL;
722
723 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
724 {
725
726         struct acpi_sbs *sbs = seq->private;
727
728         mutex_lock(&sbs->lock);
729
730         seq_printf(seq, "state:                   %s\n",
731                    sbs->charger_present ? "on-line" : "off-line");
732
733         mutex_unlock(&sbs->lock);
734         return 0;
735 }
736
737 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
738 {
739         return single_open(file, acpi_ac_read_state, PDE(inode)->data);
740 }
741
742 static const struct file_operations acpi_ac_state_fops = {
743         .open = acpi_ac_state_open_fs,
744         .read = seq_read,
745         .llseek = seq_lseek,
746         .release = single_release,
747         .owner = THIS_MODULE,
748 };
749
750 #endif
751
752 /* --------------------------------------------------------------------------
753                                  Driver Interface
754    -------------------------------------------------------------------------- */
755 static int acpi_battery_read(struct acpi_battery *battery)
756 {
757         int result = 0, saved_present = battery->present;
758         u16 state;
759
760         if (battery->sbs->manager_present) {
761                 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
762                                 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
763                 if (!result)
764                         battery->present = state & (1 << battery->id);
765                 state &= 0x0fff;
766                 state |= 1 << (battery->id + 12);
767                 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
768                                   ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
769         } else if (battery->id == 0)
770                 battery->present = 1;
771         if (result || !battery->present)
772                 return result;
773
774         if (saved_present != battery->present) {
775                 battery->update_time = 0;
776                 result = acpi_battery_get_info(battery);
777                 if (result)
778                         return result;
779         }
780         result = acpi_battery_get_state(battery);
781         return result;
782 }
783
784 /* Smart Battery */
785 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
786 {
787         struct acpi_battery *battery = &sbs->battery[id];
788         int result;
789
790         battery->id = id;
791         battery->sbs = sbs;
792         result = acpi_battery_read(battery);
793         if (result)
794                 return result;
795
796         sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
797 #ifdef CONFIG_ACPI_PROCFS_POWER
798         acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
799                         battery->name, &acpi_battery_info_fops,
800                         &acpi_battery_state_fops, &acpi_battery_alarm_fops,
801                         battery);
802 #endif
803         battery->bat.name = battery->name;
804         battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
805         if (!acpi_battery_mode(battery)) {
806                 battery->bat.properties = sbs_charge_battery_props;
807                 battery->bat.num_properties =
808                     ARRAY_SIZE(sbs_charge_battery_props);
809         } else {
810                 battery->bat.properties = sbs_energy_battery_props;
811                 battery->bat.num_properties =
812                     ARRAY_SIZE(sbs_energy_battery_props);
813         }
814         battery->bat.get_property = acpi_sbs_battery_get_property;
815         result = power_supply_register(&sbs->device->dev, &battery->bat);
816         if (result)
817                 goto end;
818         result = device_create_file(battery->bat.dev, &alarm_attr);
819         if (result)
820                 goto end;
821         battery->have_sysfs_alarm = 1;
822       end:
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         struct acpi_battery *battery = &sbs->battery[id];
832
833         if (battery->bat.dev) {
834                 if (battery->have_sysfs_alarm)
835                         device_remove_file(battery->bat.dev, &alarm_attr);
836                 power_supply_unregister(&battery->bat);
837         }
838 #ifdef CONFIG_ACPI_PROCFS_POWER
839         if (battery->proc_entry)
840                 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
841 #endif
842 }
843
844 static int acpi_charger_add(struct acpi_sbs *sbs)
845 {
846         int result;
847
848         result = acpi_ac_get_present(sbs);
849         if (result)
850                 goto end;
851 #ifdef CONFIG_ACPI_PROCFS_POWER
852         result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
853                                  ACPI_AC_DIR_NAME, NULL,
854                                  &acpi_ac_state_fops, NULL, sbs);
855         if (result)
856                 goto end;
857 #endif
858         sbs->charger.name = "sbs-charger";
859         sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
860         sbs->charger.properties = sbs_ac_props;
861         sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
862         sbs->charger.get_property = sbs_get_ac_property;
863         power_supply_register(&sbs->device->dev, &sbs->charger);
864         printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
865                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
866                ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
867       end:
868         return result;
869 }
870
871 static void acpi_charger_remove(struct acpi_sbs *sbs)
872 {
873         if (sbs->charger.dev)
874                 power_supply_unregister(&sbs->charger);
875 #ifdef CONFIG_ACPI_PROCFS_POWER
876         if (sbs->charger_entry)
877                 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
878 #endif
879 }
880
881 static void acpi_sbs_callback(void *context)
882 {
883         int id;
884         struct acpi_sbs *sbs = context;
885         struct acpi_battery *bat;
886         u8 saved_charger_state = sbs->charger_present;
887         u8 saved_battery_state;
888         acpi_ac_get_present(sbs);
889         if (sbs->charger_present != saved_charger_state) {
890 #ifdef CONFIG_ACPI_PROC_EVENT
891                 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
892                                               ACPI_SBS_NOTIFY_STATUS,
893                                               sbs->charger_present);
894 #endif
895                 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
896         }
897         if (sbs->manager_present) {
898                 for (id = 0; id < MAX_SBS_BAT; ++id) {
899                         if (!(sbs->batteries_supported & (1 << id)))
900                                 continue;
901                         bat = &sbs->battery[id];
902                         saved_battery_state = bat->present;
903                         acpi_battery_read(bat);
904                         if (saved_battery_state == bat->present)
905                                 continue;
906 #ifdef CONFIG_ACPI_PROC_EVENT
907                         acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
908                                                       bat->name,
909                                                       ACPI_SBS_NOTIFY_STATUS,
910                                                       bat->present);
911 #endif
912                         kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
913                 }
914         }
915 }
916
917 static int acpi_sbs_add(struct acpi_device *device)
918 {
919         struct acpi_sbs *sbs;
920         int result = 0;
921         int id;
922
923         sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
924         if (!sbs) {
925                 result = -ENOMEM;
926                 goto end;
927         }
928
929         mutex_init(&sbs->lock);
930
931         sbs->hc = acpi_driver_data(device->parent);
932         sbs->device = device;
933         strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
934         strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
935         device->driver_data = sbs;
936
937         result = acpi_charger_add(sbs);
938         if (result)
939                 goto end;
940
941         result = acpi_manager_get_info(sbs);
942         if (!result) {
943                 sbs->manager_present = 1;
944                 for (id = 0; id < MAX_SBS_BAT; ++id)
945                         if ((sbs->batteries_supported & (1 << id)))
946                                 acpi_battery_add(sbs, id);
947         } else
948                 acpi_battery_add(sbs, 0);
949         acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
950       end:
951         if (result)
952                 acpi_sbs_remove(device, 0);
953         return result;
954 }
955
956 static int acpi_sbs_remove(struct acpi_device *device, int type)
957 {
958         struct acpi_sbs *sbs;
959         int id;
960
961         if (!device)
962                 return -EINVAL;
963         sbs = acpi_driver_data(device);
964         if (!sbs)
965                 return -EINVAL;
966         mutex_lock(&sbs->lock);
967         acpi_smbus_unregister_callback(sbs->hc);
968         for (id = 0; id < MAX_SBS_BAT; ++id)
969                 acpi_battery_remove(sbs, id);
970         acpi_charger_remove(sbs);
971         mutex_unlock(&sbs->lock);
972         mutex_destroy(&sbs->lock);
973         kfree(sbs);
974         return 0;
975 }
976
977 static void acpi_sbs_rmdirs(void)
978 {
979 #ifdef CONFIG_ACPI_PROCFS_POWER
980         if (acpi_ac_dir) {
981                 acpi_unlock_ac_dir(acpi_ac_dir);
982                 acpi_ac_dir = NULL;
983         }
984         if (acpi_battery_dir) {
985                 acpi_unlock_battery_dir(acpi_battery_dir);
986                 acpi_battery_dir = NULL;
987         }
988 #endif
989 }
990
991 static int acpi_sbs_resume(struct acpi_device *device)
992 {
993         struct acpi_sbs *sbs;
994         if (!device)
995                 return -EINVAL;
996         sbs = device->driver_data;
997         acpi_sbs_callback(sbs);
998         return 0;
999 }
1000
1001 static struct acpi_driver acpi_sbs_driver = {
1002         .name = "sbs",
1003         .class = ACPI_SBS_CLASS,
1004         .ids = sbs_device_ids,
1005         .ops = {
1006                 .add = acpi_sbs_add,
1007                 .remove = acpi_sbs_remove,
1008                 .resume = acpi_sbs_resume,
1009                 },
1010 };
1011
1012 static int __init acpi_sbs_init(void)
1013 {
1014         int result = 0;
1015
1016         if (acpi_disabled)
1017                 return -ENODEV;
1018 #ifdef CONFIG_ACPI_PROCFS_POWER
1019         acpi_ac_dir = acpi_lock_ac_dir();
1020         if (!acpi_ac_dir)
1021                 return -ENODEV;
1022         acpi_battery_dir = acpi_lock_battery_dir();
1023         if (!acpi_battery_dir) {
1024                 acpi_sbs_rmdirs();
1025                 return -ENODEV;
1026         }
1027 #endif
1028         result = acpi_bus_register_driver(&acpi_sbs_driver);
1029         if (result < 0) {
1030                 acpi_sbs_rmdirs();
1031                 return -ENODEV;
1032         }
1033         return 0;
1034 }
1035
1036 static void __exit acpi_sbs_exit(void)
1037 {
1038         acpi_bus_unregister_driver(&acpi_sbs_driver);
1039         acpi_sbs_rmdirs();
1040         return;
1041 }
1042
1043 module_init(acpi_sbs_init);
1044 module_exit(acpi_sbs_exit);