585ae3c9c8ea98651e33f46de53876fac237f48d
[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 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 #ifdef CONFIG_ACPI_SYSFS_POWER
86         struct power_supply bat;
87 #endif
88         struct acpi_sbs *sbs;
89 #ifdef CONFIG_ACPI_PROCFS_POWER
90         struct proc_dir_entry *proc_entry;
91 #endif
92         unsigned long update_time;
93         char name[8];
94         char manufacturer_name[ACPI_SBS_BLOCK_MAX];
95         char device_name[ACPI_SBS_BLOCK_MAX];
96         char device_chemistry[ACPI_SBS_BLOCK_MAX];
97         u16 alarm_capacity;
98         u16 full_charge_capacity;
99         u16 design_capacity;
100         u16 design_voltage;
101         u16 serial_number;
102         u16 cycle_count;
103         u16 temp_now;
104         u16 voltage_now;
105         s16 current_now;
106         s16 current_avg;
107         u16 capacity_now;
108         u16 state_of_charge;
109         u16 state;
110         u16 mode;
111         u16 spec;
112         u8 id;
113         u8 present:1;
114         u8 have_sysfs_alarm:1;
115 };
116
117 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
118
119 struct acpi_sbs {
120 #ifdef CONFIG_ACPI_SYSFS_POWER
121         struct power_supply charger;
122 #endif
123         struct acpi_device *device;
124         struct acpi_smb_hc *hc;
125         struct mutex lock;
126 #ifdef CONFIG_ACPI_PROCFS_POWER
127         struct proc_dir_entry *charger_entry;
128 #endif
129         struct acpi_battery battery[MAX_SBS_BAT];
130         u8 batteries_supported:4;
131         u8 manager_present:1;
132         u8 charger_present:1;
133 };
134
135 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
136
137 static inline int battery_scale(int log)
138 {
139         int scale = 1;
140         while (log--)
141                 scale *= 10;
142         return scale;
143 }
144
145 static inline int acpi_battery_vscale(struct acpi_battery *battery)
146 {
147         return battery_scale((battery->spec & 0x0f00) >> 8);
148 }
149
150 static inline int acpi_battery_ipscale(struct acpi_battery *battery)
151 {
152         return battery_scale((battery->spec & 0xf000) >> 12);
153 }
154
155 static inline int acpi_battery_mode(struct acpi_battery *battery)
156 {
157         return (battery->mode & 0x8000);
158 }
159
160 static inline int acpi_battery_scale(struct acpi_battery *battery)
161 {
162         return (acpi_battery_mode(battery) ? 10 : 1) *
163             acpi_battery_ipscale(battery);
164 }
165
166 #ifdef CONFIG_ACPI_SYSFS_POWER
167 static int sbs_get_ac_property(struct power_supply *psy,
168                                enum power_supply_property psp,
169                                union power_supply_propval *val)
170 {
171         struct acpi_sbs *sbs = to_acpi_sbs(psy);
172         switch (psp) {
173         case POWER_SUPPLY_PROP_ONLINE:
174                 val->intval = sbs->charger_present;
175                 break;
176         default:
177                 return -EINVAL;
178         }
179         return 0;
180 }
181
182 static int acpi_battery_technology(struct acpi_battery *battery)
183 {
184         if (!strcasecmp("NiCd", battery->device_chemistry))
185                 return POWER_SUPPLY_TECHNOLOGY_NiCd;
186         if (!strcasecmp("NiMH", battery->device_chemistry))
187                 return POWER_SUPPLY_TECHNOLOGY_NiMH;
188         if (!strcasecmp("LION", battery->device_chemistry))
189                 return POWER_SUPPLY_TECHNOLOGY_LION;
190         if (!strcasecmp("LiP", battery->device_chemistry))
191                 return POWER_SUPPLY_TECHNOLOGY_LIPO;
192         return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
193 }
194
195 static int acpi_sbs_battery_get_property(struct power_supply *psy,
196                                          enum power_supply_property psp,
197                                          union power_supply_propval *val)
198 {
199         struct acpi_battery *battery = to_acpi_battery(psy);
200
201         if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
202                 return -ENODEV;
203         switch (psp) {
204         case POWER_SUPPLY_PROP_STATUS:
205                 if (battery->current_now < 0)
206                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
207                 else if (battery->current_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_VOLTAGE_MIN_DESIGN:
219                 val->intval = battery->design_voltage *
220                         acpi_battery_vscale(battery) * 1000;
221                 break;
222         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
223                 val->intval = battery->voltage_now *
224                                 acpi_battery_vscale(battery) * 1000;
225                 break;
226         case POWER_SUPPLY_PROP_CURRENT_NOW:
227                 val->intval = abs(battery->current_now) *
228                                 acpi_battery_ipscale(battery) * 1000;
229                 break;
230         case POWER_SUPPLY_PROP_CURRENT_AVG:
231                 val->intval = abs(battery->current_avg) *
232                                 acpi_battery_ipscale(battery) * 1000;
233                 break;
234         case POWER_SUPPLY_PROP_CAPACITY:
235                 val->intval = battery->state_of_charge;
236                 break;
237         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
238         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
239                 val->intval = battery->design_capacity *
240                         acpi_battery_scale(battery) * 1000;
241                 break;
242         case POWER_SUPPLY_PROP_CHARGE_FULL:
243         case POWER_SUPPLY_PROP_ENERGY_FULL:
244                 val->intval = battery->full_charge_capacity *
245                         acpi_battery_scale(battery) * 1000;
246                 break;
247         case POWER_SUPPLY_PROP_CHARGE_NOW:
248         case POWER_SUPPLY_PROP_ENERGY_NOW:
249                 val->intval = battery->capacity_now *
250                                 acpi_battery_scale(battery) * 1000;
251                 break;
252         case POWER_SUPPLY_PROP_TEMP:
253                 val->intval = battery->temp_now - 2730; // dK -> dC
254                 break;
255         case POWER_SUPPLY_PROP_MODEL_NAME:
256                 val->strval = battery->device_name;
257                 break;
258         case POWER_SUPPLY_PROP_MANUFACTURER:
259                 val->strval = battery->manufacturer_name;
260                 break;
261         default:
262                 return -EINVAL;
263         }
264         return 0;
265 }
266
267 static enum power_supply_property sbs_ac_props[] = {
268         POWER_SUPPLY_PROP_ONLINE,
269 };
270
271 static enum power_supply_property sbs_charge_battery_props[] = {
272         POWER_SUPPLY_PROP_STATUS,
273         POWER_SUPPLY_PROP_PRESENT,
274         POWER_SUPPLY_PROP_TECHNOLOGY,
275         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
276         POWER_SUPPLY_PROP_VOLTAGE_NOW,
277         POWER_SUPPLY_PROP_CURRENT_NOW,
278         POWER_SUPPLY_PROP_CURRENT_AVG,
279         POWER_SUPPLY_PROP_CAPACITY,
280         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
281         POWER_SUPPLY_PROP_CHARGE_FULL,
282         POWER_SUPPLY_PROP_CHARGE_NOW,
283         POWER_SUPPLY_PROP_TEMP,
284         POWER_SUPPLY_PROP_MODEL_NAME,
285         POWER_SUPPLY_PROP_MANUFACTURER,
286 };
287
288 static enum power_supply_property sbs_energy_battery_props[] = {
289         POWER_SUPPLY_PROP_STATUS,
290         POWER_SUPPLY_PROP_PRESENT,
291         POWER_SUPPLY_PROP_TECHNOLOGY,
292         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
293         POWER_SUPPLY_PROP_VOLTAGE_NOW,
294         POWER_SUPPLY_PROP_CURRENT_NOW,
295         POWER_SUPPLY_PROP_CURRENT_AVG,
296         POWER_SUPPLY_PROP_CAPACITY,
297         POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
298         POWER_SUPPLY_PROP_ENERGY_FULL,
299         POWER_SUPPLY_PROP_ENERGY_NOW,
300         POWER_SUPPLY_PROP_TEMP,
301         POWER_SUPPLY_PROP_MODEL_NAME,
302         POWER_SUPPLY_PROP_MANUFACTURER,
303 };
304 #endif
305
306 /* --------------------------------------------------------------------------
307                             Smart Battery System Management
308    -------------------------------------------------------------------------- */
309
310 struct acpi_battery_reader {
311         u8 command;             /* command for battery */
312         u8 mode;                /* word or block? */
313         size_t offset;          /* offset inside struct acpi_sbs_battery */
314 };
315
316 static struct acpi_battery_reader info_readers[] = {
317         {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
318         {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
319         {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
320         {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
321         {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
322         {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
323         {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
324         {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
325         {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
326         {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
327         {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
328 };
329
330 static struct acpi_battery_reader state_readers[] = {
331         {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
332         {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
333         {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_now)},
334         {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_avg)},
335         {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
336         {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
337         {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
338 };
339
340 static int acpi_manager_get_info(struct acpi_sbs *sbs)
341 {
342         int result = 0;
343         u16 battery_system_info;
344
345         result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
346                                  0x04, (u8 *)&battery_system_info);
347         if (!result)
348                 sbs->batteries_supported = battery_system_info & 0x000f;
349         return result;
350 }
351
352 static int acpi_battery_get_info(struct acpi_battery *battery)
353 {
354         int i, result = 0;
355
356         for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
357                 result = acpi_smbus_read(battery->sbs->hc,
358                                          info_readers[i].mode,
359                                          ACPI_SBS_BATTERY,
360                                          info_readers[i].command,
361                                          (u8 *) battery +
362                                                 info_readers[i].offset);
363                 if (result)
364                         break;
365         }
366         return result;
367 }
368
369 static int acpi_battery_get_state(struct acpi_battery *battery)
370 {
371         int i, result = 0;
372
373         if (battery->update_time &&
374             time_before(jiffies, battery->update_time +
375                                 msecs_to_jiffies(cache_time)))
376                 return 0;
377         for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
378                 result = acpi_smbus_read(battery->sbs->hc,
379                                          state_readers[i].mode,
380                                          ACPI_SBS_BATTERY,
381                                          state_readers[i].command,
382                                          (u8 *)battery +
383                                                 state_readers[i].offset);
384                 if (result)
385                         goto end;
386         }
387       end:
388         battery->update_time = jiffies;
389         return result;
390 }
391
392 static int acpi_battery_get_alarm(struct acpi_battery *battery)
393 {
394         return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
395                                  ACPI_SBS_BATTERY, 0x01,
396                                  (u8 *)&battery->alarm_capacity);
397 }
398
399 static int acpi_battery_set_alarm(struct acpi_battery *battery)
400 {
401         struct acpi_sbs *sbs = battery->sbs;
402         u16 value, sel = 1 << (battery->id + 12);
403
404         int ret;
405
406
407         if (sbs->manager_present) {
408                 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
409                                 0x01, (u8 *)&value);
410                 if (ret)
411                         goto end;
412                 if ((value & 0xf000) != sel) {
413                         value &= 0x0fff;
414                         value |= sel;
415                 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
416                                          ACPI_SBS_MANAGER,
417                                          0x01, (u8 *)&value, 2);
418                 if (ret)
419                         goto end;
420                 }
421         }
422         ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
423                                 0x01, (u8 *)&battery->alarm_capacity, 2);
424       end:
425         return ret;
426 }
427
428 static int acpi_ac_get_present(struct acpi_sbs *sbs)
429 {
430         int result;
431         u16 status;
432
433         result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
434                                  0x13, (u8 *) & status);
435         if (!result)
436                 sbs->charger_present = (status >> 15) & 0x1;
437         return result;
438 }
439
440 #ifdef CONFIG_ACPI_SYSFS_POWER
441 static ssize_t acpi_battery_alarm_show(struct device *dev,
442                                         struct device_attribute *attr,
443                                         char *buf)
444 {
445         struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
446         acpi_battery_get_alarm(battery);
447         return sprintf(buf, "%d\n", battery->alarm_capacity *
448                                 acpi_battery_scale(battery) * 1000);
449 }
450
451 static ssize_t acpi_battery_alarm_store(struct device *dev,
452                                         struct device_attribute *attr,
453                                         const char *buf, size_t count)
454 {
455         unsigned long x;
456         struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
457         if (sscanf(buf, "%ld\n", &x) == 1)
458                 battery->alarm_capacity = x /
459                         (1000 * acpi_battery_scale(battery));
460         if (battery->present)
461                 acpi_battery_set_alarm(battery);
462         return count;
463 }
464
465 static struct device_attribute alarm_attr = {
466         .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE},
467         .show = acpi_battery_alarm_show,
468         .store = acpi_battery_alarm_store,
469 };
470 #endif
471
472 /* --------------------------------------------------------------------------
473                               FS Interface (/proc/acpi)
474    -------------------------------------------------------------------------- */
475
476 #ifdef CONFIG_ACPI_PROCFS_POWER
477 /* Generic Routines */
478 static int
479 acpi_sbs_add_fs(struct proc_dir_entry **dir,
480                 struct proc_dir_entry *parent_dir,
481                 char *dir_name,
482                 struct file_operations *info_fops,
483                 struct file_operations *state_fops,
484                 struct file_operations *alarm_fops, void *data)
485 {
486         struct proc_dir_entry *entry = NULL;
487
488         if (!*dir) {
489                 *dir = proc_mkdir(dir_name, parent_dir);
490                 if (!*dir) {
491                         return -ENODEV;
492                 }
493                 (*dir)->owner = THIS_MODULE;
494         }
495
496         /* 'info' [R] */
497         if (info_fops) {
498                 entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
499                 if (entry) {
500                         entry->proc_fops = info_fops;
501                         entry->data = data;
502                         entry->owner = THIS_MODULE;
503                 }
504         }
505
506         /* 'state' [R] */
507         if (state_fops) {
508                 entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
509                 if (entry) {
510                         entry->proc_fops = state_fops;
511                         entry->data = data;
512                         entry->owner = THIS_MODULE;
513                 }
514         }
515
516         /* 'alarm' [R/W] */
517         if (alarm_fops) {
518                 entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
519                 if (entry) {
520                         entry->proc_fops = alarm_fops;
521                         entry->data = data;
522                         entry->owner = THIS_MODULE;
523                 }
524         }
525         return 0;
526 }
527
528 static void
529 acpi_sbs_remove_fs(struct proc_dir_entry **dir,
530                            struct proc_dir_entry *parent_dir)
531 {
532         if (*dir) {
533                 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
534                 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
535                 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
536                 remove_proc_entry((*dir)->name, parent_dir);
537                 *dir = NULL;
538         }
539 }
540
541 /* Smart Battery Interface */
542 static struct proc_dir_entry *acpi_battery_dir = NULL;
543
544 static inline char *acpi_battery_units(struct acpi_battery *battery)
545 {
546         return acpi_battery_mode(battery) ? " mW" : " mA";
547 }
548
549
550 static int acpi_battery_read_info(struct seq_file *seq, void *offset)
551 {
552         struct acpi_battery *battery = seq->private;
553         struct acpi_sbs *sbs = battery->sbs;
554         int result = 0;
555
556         mutex_lock(&sbs->lock);
557
558         seq_printf(seq, "present:                 %s\n",
559                    (battery->present) ? "yes" : "no");
560         if (!battery->present)
561                 goto end;
562
563         seq_printf(seq, "design capacity:         %i%sh\n",
564                    battery->design_capacity * acpi_battery_scale(battery),
565                    acpi_battery_units(battery));
566         seq_printf(seq, "last full capacity:      %i%sh\n",
567                    battery->full_charge_capacity * acpi_battery_scale(battery),
568                    acpi_battery_units(battery));
569         seq_printf(seq, "battery technology:      rechargeable\n");
570         seq_printf(seq, "design voltage:          %i mV\n",
571                    battery->design_voltage * acpi_battery_vscale(battery));
572         seq_printf(seq, "design capacity warning: unknown\n");
573         seq_printf(seq, "design capacity low:     unknown\n");
574         seq_printf(seq, "capacity granularity 1:  unknown\n");
575         seq_printf(seq, "capacity granularity 2:  unknown\n");
576         seq_printf(seq, "model number:            %s\n", battery->device_name);
577         seq_printf(seq, "serial number:           %i\n",
578                    battery->serial_number);
579         seq_printf(seq, "battery type:            %s\n",
580                    battery->device_chemistry);
581         seq_printf(seq, "OEM info:                %s\n",
582                    battery->manufacturer_name);
583       end:
584         mutex_unlock(&sbs->lock);
585         return result;
586 }
587
588 static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
589 {
590         return single_open(file, acpi_battery_read_info, PDE(inode)->data);
591 }
592
593 static int acpi_battery_read_state(struct seq_file *seq, void *offset)
594 {
595         struct acpi_battery *battery = seq->private;
596         struct acpi_sbs *sbs = battery->sbs;
597         int rate;
598
599         mutex_lock(&sbs->lock);
600         seq_printf(seq, "present:                 %s\n",
601                    (battery->present) ? "yes" : "no");
602         if (!battery->present)
603                 goto end;
604
605         acpi_battery_get_state(battery);
606         seq_printf(seq, "capacity state:          %s\n",
607                    (battery->state & 0x0010) ? "critical" : "ok");
608         seq_printf(seq, "charging state:          %s\n",
609                    (battery->current_now < 0) ? "discharging" :
610                    ((battery->current_now > 0) ? "charging" : "charged"));
611         rate = abs(battery->current_now) * acpi_battery_ipscale(battery);
612         rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
613                         acpi_battery_vscale(battery)/1000):1;
614         seq_printf(seq, "present rate:            %d%s\n", rate,
615                    acpi_battery_units(battery));
616         seq_printf(seq, "remaining capacity:      %i%sh\n",
617                    battery->capacity_now * acpi_battery_scale(battery),
618                    acpi_battery_units(battery));
619         seq_printf(seq, "present voltage:         %i mV\n",
620                    battery->voltage_now * acpi_battery_vscale(battery));
621
622       end:
623         mutex_unlock(&sbs->lock);
624         return 0;
625 }
626
627 static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
628 {
629         return single_open(file, acpi_battery_read_state, PDE(inode)->data);
630 }
631
632 static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
633 {
634         struct acpi_battery *battery = seq->private;
635         struct acpi_sbs *sbs = battery->sbs;
636         int result = 0;
637
638         mutex_lock(&sbs->lock);
639
640         if (!battery->present) {
641                 seq_printf(seq, "present:                 no\n");
642                 goto end;
643         }
644
645         acpi_battery_get_alarm(battery);
646         seq_printf(seq, "alarm:                   ");
647         if (battery->alarm_capacity)
648                 seq_printf(seq, "%i%sh\n",
649                            battery->alarm_capacity *
650                            acpi_battery_scale(battery),
651                            acpi_battery_units(battery));
652         else
653                 seq_printf(seq, "disabled\n");
654       end:
655         mutex_unlock(&sbs->lock);
656         return result;
657 }
658
659 static ssize_t
660 acpi_battery_write_alarm(struct file *file, const char __user * buffer,
661                          size_t count, loff_t * ppos)
662 {
663         struct seq_file *seq = file->private_data;
664         struct acpi_battery *battery = seq->private;
665         struct acpi_sbs *sbs = battery->sbs;
666         char alarm_string[12] = { '\0' };
667         int result = 0;
668         mutex_lock(&sbs->lock);
669         if (!battery->present) {
670                 result = -ENODEV;
671                 goto end;
672         }
673         if (count > sizeof(alarm_string) - 1) {
674                 result = -EINVAL;
675                 goto end;
676         }
677         if (copy_from_user(alarm_string, buffer, count)) {
678                 result = -EFAULT;
679                 goto end;
680         }
681         alarm_string[count] = 0;
682         battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
683                                         acpi_battery_scale(battery);
684         acpi_battery_set_alarm(battery);
685       end:
686         mutex_unlock(&sbs->lock);
687         if (result)
688                 return result;
689         return count;
690 }
691
692 static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
693 {
694         return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
695 }
696
697 static struct file_operations acpi_battery_info_fops = {
698         .open = acpi_battery_info_open_fs,
699         .read = seq_read,
700         .llseek = seq_lseek,
701         .release = single_release,
702         .owner = THIS_MODULE,
703 };
704
705 static struct file_operations acpi_battery_state_fops = {
706         .open = acpi_battery_state_open_fs,
707         .read = seq_read,
708         .llseek = seq_lseek,
709         .release = single_release,
710         .owner = THIS_MODULE,
711 };
712
713 static struct file_operations acpi_battery_alarm_fops = {
714         .open = acpi_battery_alarm_open_fs,
715         .read = seq_read,
716         .write = acpi_battery_write_alarm,
717         .llseek = seq_lseek,
718         .release = single_release,
719         .owner = THIS_MODULE,
720 };
721
722 /* Legacy AC Adapter Interface */
723
724 static struct proc_dir_entry *acpi_ac_dir = NULL;
725
726 static int acpi_ac_read_state(struct seq_file *seq, void *offset)
727 {
728
729         struct acpi_sbs *sbs = seq->private;
730
731         mutex_lock(&sbs->lock);
732
733         seq_printf(seq, "state:                   %s\n",
734                    sbs->charger_present ? "on-line" : "off-line");
735
736         mutex_unlock(&sbs->lock);
737         return 0;
738 }
739
740 static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
741 {
742         return single_open(file, acpi_ac_read_state, PDE(inode)->data);
743 }
744
745 static struct file_operations acpi_ac_state_fops = {
746         .open = acpi_ac_state_open_fs,
747         .read = seq_read,
748         .llseek = seq_lseek,
749         .release = single_release,
750         .owner = THIS_MODULE,
751 };
752
753 #endif
754
755 /* --------------------------------------------------------------------------
756                                  Driver Interface
757    -------------------------------------------------------------------------- */
758 static int acpi_battery_read(struct acpi_battery *battery)
759 {
760         int result = 0, saved_present = battery->present;
761         u16 state;
762
763         if (battery->sbs->manager_present) {
764                 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
765                                 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
766                 if (!result)
767                         battery->present = state & (1 << battery->id);
768                 state &= 0x0fff;
769                 state |= 1 << (battery->id + 12);
770                 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
771                                   ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
772         } else if (battery->id == 0)
773                 battery->present = 1;
774         if (result || !battery->present)
775                 return result;
776
777         if (saved_present != battery->present) {
778                 battery->update_time = 0;
779                 result = acpi_battery_get_info(battery);
780                 if (result)
781                         return result;
782         }
783         result = acpi_battery_get_state(battery);
784         return result;
785 }
786
787 /* Smart Battery */
788 static int acpi_battery_add(struct acpi_sbs *sbs, int id)
789 {
790         struct acpi_battery *battery = &sbs->battery[id];
791         int result;
792
793         battery->id = id;
794         battery->sbs = sbs;
795         result = acpi_battery_read(battery);
796         if (result)
797                 return result;
798
799         sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
800 #ifdef CONFIG_ACPI_PROCFS_POWER
801         acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
802                         battery->name, &acpi_battery_info_fops,
803                         &acpi_battery_state_fops, &acpi_battery_alarm_fops,
804                         battery);
805 #endif
806 #ifdef CONFIG_ACPI_SYSFS_POWER
807         battery->bat.name = battery->name;
808         battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
809         if (!acpi_battery_mode(battery)) {
810                 battery->bat.properties = sbs_charge_battery_props;
811                 battery->bat.num_properties =
812                     ARRAY_SIZE(sbs_charge_battery_props);
813         } else {
814                 battery->bat.properties = sbs_energy_battery_props;
815                 battery->bat.num_properties =
816                     ARRAY_SIZE(sbs_energy_battery_props);
817         }
818         battery->bat.get_property = acpi_sbs_battery_get_property;
819         result = power_supply_register(&sbs->device->dev, &battery->bat);
820         if (result)
821                 goto end;
822         result = device_create_file(battery->bat.dev, &alarm_attr);
823         if (result)
824                 goto end;
825         battery->have_sysfs_alarm = 1;
826       end:
827 #endif
828         printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
829                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
830                battery->name, battery->present ? "present" : "absent");
831         return result;
832 }
833
834 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
835 {
836         struct acpi_battery *battery = &sbs->battery[id];
837 #ifdef CONFIG_ACPI_SYSFS_POWER
838         if (battery->bat.dev) {
839                 if (battery->have_sysfs_alarm)
840                         device_remove_file(battery->bat.dev, &alarm_attr);
841                 power_supply_unregister(&battery->bat);
842         }
843 #endif
844 #ifdef CONFIG_ACPI_PROCFS_POWER
845         if (battery->proc_entry)
846                 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
847 #endif
848 }
849
850 static int acpi_charger_add(struct acpi_sbs *sbs)
851 {
852         int result;
853
854         result = acpi_ac_get_present(sbs);
855         if (result)
856                 goto end;
857 #ifdef CONFIG_ACPI_PROCFS_POWER
858         result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
859                                  ACPI_AC_DIR_NAME, NULL,
860                                  &acpi_ac_state_fops, NULL, sbs);
861         if (result)
862                 goto end;
863 #endif
864 #ifdef CONFIG_ACPI_SYSFS_POWER
865         sbs->charger.name = "sbs-charger";
866         sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
867         sbs->charger.properties = sbs_ac_props;
868         sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
869         sbs->charger.get_property = sbs_get_ac_property;
870         power_supply_register(&sbs->device->dev, &sbs->charger);
871 #endif
872         printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
873                ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
874                ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
875       end:
876         return result;
877 }
878
879 static void acpi_charger_remove(struct acpi_sbs *sbs)
880 {
881 #ifdef CONFIG_ACPI_SYSFS_POWER
882         if (sbs->charger.dev)
883                 power_supply_unregister(&sbs->charger);
884 #endif
885 #ifdef CONFIG_ACPI_PROCFS_POWER
886         if (sbs->charger_entry)
887                 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
888 #endif
889 }
890
891 static void acpi_sbs_callback(void *context)
892 {
893         int id;
894         struct acpi_sbs *sbs = context;
895         struct acpi_battery *bat;
896         u8 saved_charger_state = sbs->charger_present;
897         u8 saved_battery_state;
898         acpi_ac_get_present(sbs);
899         if (sbs->charger_present != saved_charger_state) {
900 #ifdef CONFIG_ACPI_PROC_EVENT
901                 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
902                                               ACPI_SBS_NOTIFY_STATUS,
903                                               sbs->charger_present);
904 #endif
905 #ifdef CONFIG_ACPI_SYSFS_POWER
906                 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
907 #endif
908         }
909         if (sbs->manager_present) {
910                 for (id = 0; id < MAX_SBS_BAT; ++id) {
911                         if (!(sbs->batteries_supported & (1 << id)))
912                                 continue;
913                         bat = &sbs->battery[id];
914                         saved_battery_state = bat->present;
915                         acpi_battery_read(bat);
916                         if (saved_battery_state == bat->present)
917                                 continue;
918 #ifdef CONFIG_ACPI_PROC_EVENT
919                         acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
920                                                       bat->name,
921                                                       ACPI_SBS_NOTIFY_STATUS,
922                                                       bat->present);
923 #endif
924 #ifdef CONFIG_ACPI_SYSFS_POWER
925                         kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
926 #endif
927                 }
928         }
929 }
930
931 static int acpi_sbs_remove(struct acpi_device *device, int type);
932
933 static int acpi_sbs_add(struct acpi_device *device)
934 {
935         struct acpi_sbs *sbs;
936         int result = 0;
937         int id;
938
939         sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
940         if (!sbs) {
941                 result = -ENOMEM;
942                 goto end;
943         }
944
945         mutex_init(&sbs->lock);
946
947         sbs->hc = acpi_driver_data(device->parent);
948         sbs->device = device;
949         strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
950         strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
951         acpi_driver_data(device) = sbs;
952
953         result = acpi_charger_add(sbs);
954         if (result)
955                 goto end;
956
957         result = acpi_manager_get_info(sbs);
958         if (!result) {
959                 sbs->manager_present = 1;
960                 for (id = 0; id < MAX_SBS_BAT; ++id)
961                         if ((sbs->batteries_supported & (1 << id)))
962                                 acpi_battery_add(sbs, id);
963         } else
964                 acpi_battery_add(sbs, 0);
965         acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
966       end:
967         if (result)
968                 acpi_sbs_remove(device, 0);
969         return result;
970 }
971
972 static int acpi_sbs_remove(struct acpi_device *device, int type)
973 {
974         struct acpi_sbs *sbs;
975         int id;
976
977         if (!device)
978                 return -EINVAL;
979         sbs = acpi_driver_data(device);
980         if (!sbs)
981                 return -EINVAL;
982         mutex_lock(&sbs->lock);
983         acpi_smbus_unregister_callback(sbs->hc);
984         for (id = 0; id < MAX_SBS_BAT; ++id)
985                 acpi_battery_remove(sbs, id);
986         acpi_charger_remove(sbs);
987         mutex_unlock(&sbs->lock);
988         mutex_destroy(&sbs->lock);
989         kfree(sbs);
990         return 0;
991 }
992
993 static void acpi_sbs_rmdirs(void)
994 {
995 #ifdef CONFIG_ACPI_PROCFS_POWER
996         if (acpi_ac_dir) {
997                 acpi_unlock_ac_dir(acpi_ac_dir);
998                 acpi_ac_dir = NULL;
999         }
1000         if (acpi_battery_dir) {
1001                 acpi_unlock_battery_dir(acpi_battery_dir);
1002                 acpi_battery_dir = NULL;
1003         }
1004 #endif
1005 }
1006
1007 static int acpi_sbs_resume(struct acpi_device *device)
1008 {
1009         struct acpi_sbs *sbs;
1010         if (!device)
1011                 return -EINVAL;
1012         sbs = device->driver_data;
1013         acpi_sbs_callback(sbs);
1014         return 0;
1015 }
1016
1017 static struct acpi_driver acpi_sbs_driver = {
1018         .name = "sbs",
1019         .class = ACPI_SBS_CLASS,
1020         .ids = sbs_device_ids,
1021         .ops = {
1022                 .add = acpi_sbs_add,
1023                 .remove = acpi_sbs_remove,
1024                 .resume = acpi_sbs_resume,
1025                 },
1026 };
1027
1028 static int __init acpi_sbs_init(void)
1029 {
1030         int result = 0;
1031
1032         if (acpi_disabled)
1033                 return -ENODEV;
1034 #ifdef CONFIG_ACPI_PROCFS_POWER
1035         acpi_ac_dir = acpi_lock_ac_dir();
1036         if (!acpi_ac_dir)
1037                 return -ENODEV;
1038         acpi_battery_dir = acpi_lock_battery_dir();
1039         if (!acpi_battery_dir) {
1040                 acpi_sbs_rmdirs();
1041                 return -ENODEV;
1042         }
1043 #endif
1044         result = acpi_bus_register_driver(&acpi_sbs_driver);
1045         if (result < 0) {
1046                 acpi_sbs_rmdirs();
1047                 return -ENODEV;
1048         }
1049         return 0;
1050 }
1051
1052 static void __exit acpi_sbs_exit(void)
1053 {
1054         acpi_bus_unregister_driver(&acpi_sbs_driver);
1055         acpi_sbs_rmdirs();
1056         return;
1057 }
1058
1059 module_init(acpi_sbs_init);
1060 module_exit(acpi_sbs_exit);