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