tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
62MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
63MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
64MODULE_LICENSE("GPL");
65
66static unsigned int cache_time = 1000;
67module_param(cache_time, uint, 0644);
68MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
69
70extern struct proc_dir_entry *acpi_lock_ac_dir(void);
71extern struct proc_dir_entry *acpi_lock_battery_dir(void);
72extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
73extern 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
78static const struct acpi_device_id sbs_device_ids[] = {
79 {"ACPI0002", 0},
80 {"", 0},
81};
82MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
83
84struct 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
119struct 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
137static inline int battery_scale(int log)
138{
139 int scale = 1;
140 while (log--)
141 scale *= 10;
142 return scale;
143}
144
145static inline int acpi_battery_vscale(struct acpi_battery *battery)
146{
147 return battery_scale((battery->spec & 0x0f00) >> 8);
148}
149
150static inline int acpi_battery_ipscale(struct acpi_battery *battery)
151{
152 return battery_scale((battery->spec & 0xf000) >> 12);
153}
154
155static inline int acpi_battery_mode(struct acpi_battery *battery)
156{
157 return (battery->mode & 0x8000);
158}
159
160static 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
167static 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
182static 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
195static 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
267static enum power_supply_property sbs_ac_props[] = {
268 POWER_SUPPLY_PROP_ONLINE,
269};
270
271static 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
288static 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
310struct 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
316static 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
330static 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
340static 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
352static 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
369static 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
392static 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
399static 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
428static 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
441static 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
451static 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
465static struct device_attribute alarm_attr = {
466 .attr = {.name = "alarm", .mode = 0644},
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 */
478static int
479acpi_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 if (!*dir) {
487 *dir = proc_mkdir(dir_name, parent_dir);
488 if (!*dir) {
489 return -ENODEV;
490 }
491 (*dir)->owner = THIS_MODULE;
492 }
493
494 /* 'info' [R] */
495 if (info_fops)
496 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
497 info_fops, data);
498
499 /* 'state' [R] */
500 if (state_fops)
501 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
502 state_fops, data);
503
504 /* 'alarm' [R/W] */
505 if (alarm_fops)
506 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
507 alarm_fops, data);
508 return 0;
509}
510
511static void
512acpi_sbs_remove_fs(struct proc_dir_entry **dir,
513 struct proc_dir_entry *parent_dir)
514{
515 if (*dir) {
516 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
517 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
518 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
519 remove_proc_entry((*dir)->name, parent_dir);
520 *dir = NULL;
521 }
522}
523
524/* Smart Battery Interface */
525static struct proc_dir_entry *acpi_battery_dir = NULL;
526
527static inline char *acpi_battery_units(struct acpi_battery *battery)
528{
529 return acpi_battery_mode(battery) ? " mW" : " mA";
530}
531
532
533static int acpi_battery_read_info(struct seq_file *seq, void *offset)
534{
535 struct acpi_battery *battery = seq->private;
536 struct acpi_sbs *sbs = battery->sbs;
537 int result = 0;
538
539 mutex_lock(&sbs->lock);
540
541 seq_printf(seq, "present: %s\n",
542 (battery->present) ? "yes" : "no");
543 if (!battery->present)
544 goto end;
545
546 seq_printf(seq, "design capacity: %i%sh\n",
547 battery->design_capacity * acpi_battery_scale(battery),
548 acpi_battery_units(battery));
549 seq_printf(seq, "last full capacity: %i%sh\n",
550 battery->full_charge_capacity * acpi_battery_scale(battery),
551 acpi_battery_units(battery));
552 seq_printf(seq, "battery technology: rechargeable\n");
553 seq_printf(seq, "design voltage: %i mV\n",
554 battery->design_voltage * acpi_battery_vscale(battery));
555 seq_printf(seq, "design capacity warning: unknown\n");
556 seq_printf(seq, "design capacity low: unknown\n");
557 seq_printf(seq, "capacity granularity 1: unknown\n");
558 seq_printf(seq, "capacity granularity 2: unknown\n");
559 seq_printf(seq, "model number: %s\n", battery->device_name);
560 seq_printf(seq, "serial number: %i\n",
561 battery->serial_number);
562 seq_printf(seq, "battery type: %s\n",
563 battery->device_chemistry);
564 seq_printf(seq, "OEM info: %s\n",
565 battery->manufacturer_name);
566 end:
567 mutex_unlock(&sbs->lock);
568 return result;
569}
570
571static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
572{
573 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
574}
575
576static int acpi_battery_read_state(struct seq_file *seq, void *offset)
577{
578 struct acpi_battery *battery = seq->private;
579 struct acpi_sbs *sbs = battery->sbs;
580 int rate;
581
582 mutex_lock(&sbs->lock);
583 seq_printf(seq, "present: %s\n",
584 (battery->present) ? "yes" : "no");
585 if (!battery->present)
586 goto end;
587
588 acpi_battery_get_state(battery);
589 seq_printf(seq, "capacity state: %s\n",
590 (battery->state & 0x0010) ? "critical" : "ok");
591 seq_printf(seq, "charging state: %s\n",
592 (battery->current_now < 0) ? "discharging" :
593 ((battery->current_now > 0) ? "charging" : "charged"));
594 rate = abs(battery->current_now) * acpi_battery_ipscale(battery);
595 rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
596 acpi_battery_vscale(battery)/1000):1;
597 seq_printf(seq, "present rate: %d%s\n", rate,
598 acpi_battery_units(battery));
599 seq_printf(seq, "remaining capacity: %i%sh\n",
600 battery->capacity_now * acpi_battery_scale(battery),
601 acpi_battery_units(battery));
602 seq_printf(seq, "present voltage: %i mV\n",
603 battery->voltage_now * acpi_battery_vscale(battery));
604
605 end:
606 mutex_unlock(&sbs->lock);
607 return 0;
608}
609
610static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
611{
612 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
613}
614
615static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
616{
617 struct acpi_battery *battery = seq->private;
618 struct acpi_sbs *sbs = battery->sbs;
619 int result = 0;
620
621 mutex_lock(&sbs->lock);
622
623 if (!battery->present) {
624 seq_printf(seq, "present: no\n");
625 goto end;
626 }
627
628 acpi_battery_get_alarm(battery);
629 seq_printf(seq, "alarm: ");
630 if (battery->alarm_capacity)
631 seq_printf(seq, "%i%sh\n",
632 battery->alarm_capacity *
633 acpi_battery_scale(battery),
634 acpi_battery_units(battery));
635 else
636 seq_printf(seq, "disabled\n");
637 end:
638 mutex_unlock(&sbs->lock);
639 return result;
640}
641
642static ssize_t
643acpi_battery_write_alarm(struct file *file, const char __user * buffer,
644 size_t count, loff_t * ppos)
645{
646 struct seq_file *seq = file->private_data;
647 struct acpi_battery *battery = seq->private;
648 struct acpi_sbs *sbs = battery->sbs;
649 char alarm_string[12] = { '\0' };
650 int result = 0;
651 mutex_lock(&sbs->lock);
652 if (!battery->present) {
653 result = -ENODEV;
654 goto end;
655 }
656 if (count > sizeof(alarm_string) - 1) {
657 result = -EINVAL;
658 goto end;
659 }
660 if (copy_from_user(alarm_string, buffer, count)) {
661 result = -EFAULT;
662 goto end;
663 }
664 alarm_string[count] = 0;
665 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
666 acpi_battery_scale(battery);
667 acpi_battery_set_alarm(battery);
668 end:
669 mutex_unlock(&sbs->lock);
670 if (result)
671 return result;
672 return count;
673}
674
675static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
676{
677 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
678}
679
680static struct file_operations acpi_battery_info_fops = {
681 .open = acpi_battery_info_open_fs,
682 .read = seq_read,
683 .llseek = seq_lseek,
684 .release = single_release,
685 .owner = THIS_MODULE,
686};
687
688static struct file_operations acpi_battery_state_fops = {
689 .open = acpi_battery_state_open_fs,
690 .read = seq_read,
691 .llseek = seq_lseek,
692 .release = single_release,
693 .owner = THIS_MODULE,
694};
695
696static struct file_operations acpi_battery_alarm_fops = {
697 .open = acpi_battery_alarm_open_fs,
698 .read = seq_read,
699 .write = acpi_battery_write_alarm,
700 .llseek = seq_lseek,
701 .release = single_release,
702 .owner = THIS_MODULE,
703};
704
705/* Legacy AC Adapter Interface */
706
707static struct proc_dir_entry *acpi_ac_dir = NULL;
708
709static int acpi_ac_read_state(struct seq_file *seq, void *offset)
710{
711
712 struct acpi_sbs *sbs = seq->private;
713
714 mutex_lock(&sbs->lock);
715
716 seq_printf(seq, "state: %s\n",
717 sbs->charger_present ? "on-line" : "off-line");
718
719 mutex_unlock(&sbs->lock);
720 return 0;
721}
722
723static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
724{
725 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
726}
727
728static struct file_operations acpi_ac_state_fops = {
729 .open = acpi_ac_state_open_fs,
730 .read = seq_read,
731 .llseek = seq_lseek,
732 .release = single_release,
733 .owner = THIS_MODULE,
734};
735
736#endif
737
738/* --------------------------------------------------------------------------
739 Driver Interface
740 -------------------------------------------------------------------------- */
741static int acpi_battery_read(struct acpi_battery *battery)
742{
743 int result = 0, saved_present = battery->present;
744 u16 state;
745
746 if (battery->sbs->manager_present) {
747 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
748 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
749 if (!result)
750 battery->present = state & (1 << battery->id);
751 state &= 0x0fff;
752 state |= 1 << (battery->id + 12);
753 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
754 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
755 } else if (battery->id == 0)
756 battery->present = 1;
757 if (result || !battery->present)
758 return result;
759
760 if (saved_present != battery->present) {
761 battery->update_time = 0;
762 result = acpi_battery_get_info(battery);
763 if (result)
764 return result;
765 }
766 result = acpi_battery_get_state(battery);
767 return result;
768}
769
770/* Smart Battery */
771static int acpi_battery_add(struct acpi_sbs *sbs, int id)
772{
773 struct acpi_battery *battery = &sbs->battery[id];
774 int result;
775
776 battery->id = id;
777 battery->sbs = sbs;
778 result = acpi_battery_read(battery);
779 if (result)
780 return result;
781
782 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
783#ifdef CONFIG_ACPI_PROCFS_POWER
784 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
785 battery->name, &acpi_battery_info_fops,
786 &acpi_battery_state_fops, &acpi_battery_alarm_fops,
787 battery);
788#endif
789#ifdef CONFIG_ACPI_SYSFS_POWER
790 battery->bat.name = battery->name;
791 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
792 if (!acpi_battery_mode(battery)) {
793 battery->bat.properties = sbs_charge_battery_props;
794 battery->bat.num_properties =
795 ARRAY_SIZE(sbs_charge_battery_props);
796 } else {
797 battery->bat.properties = sbs_energy_battery_props;
798 battery->bat.num_properties =
799 ARRAY_SIZE(sbs_energy_battery_props);
800 }
801 battery->bat.get_property = acpi_sbs_battery_get_property;
802 result = power_supply_register(&sbs->device->dev, &battery->bat);
803 if (result)
804 goto end;
805 result = device_create_file(battery->bat.dev, &alarm_attr);
806 if (result)
807 goto end;
808 battery->have_sysfs_alarm = 1;
809 end:
810#endif
811 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
812 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
813 battery->name, battery->present ? "present" : "absent");
814 return result;
815}
816
817static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
818{
819 struct acpi_battery *battery = &sbs->battery[id];
820#ifdef CONFIG_ACPI_SYSFS_POWER
821 if (battery->bat.dev) {
822 if (battery->have_sysfs_alarm)
823 device_remove_file(battery->bat.dev, &alarm_attr);
824 power_supply_unregister(&battery->bat);
825 }
826#endif
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
833static 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#ifdef CONFIG_ACPI_SYSFS_POWER
848 sbs->charger.name = "sbs-charger";
849 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
850 sbs->charger.properties = sbs_ac_props;
851 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
852 sbs->charger.get_property = sbs_get_ac_property;
853 power_supply_register(&sbs->device->dev, &sbs->charger);
854#endif
855 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
856 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
857 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
858 end:
859 return result;
860}
861
862static void acpi_charger_remove(struct acpi_sbs *sbs)
863{
864#ifdef CONFIG_ACPI_SYSFS_POWER
865 if (sbs->charger.dev)
866 power_supply_unregister(&sbs->charger);
867#endif
868#ifdef CONFIG_ACPI_PROCFS_POWER
869 if (sbs->charger_entry)
870 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
871#endif
872}
873
874static void acpi_sbs_callback(void *context)
875{
876 int id;
877 struct acpi_sbs *sbs = context;
878 struct acpi_battery *bat;
879 u8 saved_charger_state = sbs->charger_present;
880 u8 saved_battery_state;
881 acpi_ac_get_present(sbs);
882 if (sbs->charger_present != saved_charger_state) {
883#ifdef CONFIG_ACPI_PROC_EVENT
884 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
885 ACPI_SBS_NOTIFY_STATUS,
886 sbs->charger_present);
887#endif
888#ifdef CONFIG_ACPI_SYSFS_POWER
889 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
890#endif
891 }
892 if (sbs->manager_present) {
893 for (id = 0; id < MAX_SBS_BAT; ++id) {
894 if (!(sbs->batteries_supported & (1 << id)))
895 continue;
896 bat = &sbs->battery[id];
897 saved_battery_state = bat->present;
898 acpi_battery_read(bat);
899 if (saved_battery_state == bat->present)
900 continue;
901#ifdef CONFIG_ACPI_PROC_EVENT
902 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
903 bat->name,
904 ACPI_SBS_NOTIFY_STATUS,
905 bat->present);
906#endif
907#ifdef CONFIG_ACPI_SYSFS_POWER
908 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
909#endif
910 }
911 }
912}
913
914static int acpi_sbs_remove(struct acpi_device *device, int type);
915
916static int acpi_sbs_add(struct acpi_device *device)
917{
918 struct acpi_sbs *sbs;
919 int result = 0;
920 int id;
921
922 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
923 if (!sbs) {
924 result = -ENOMEM;
925 goto end;
926 }
927
928 mutex_init(&sbs->lock);
929
930 sbs->hc = acpi_driver_data(device->parent);
931 sbs->device = device;
932 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
933 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
934 device->driver_data = sbs;
935
936 result = acpi_charger_add(sbs);
937 if (result)
938 goto end;
939
940 result = acpi_manager_get_info(sbs);
941 if (!result) {
942 sbs->manager_present = 1;
943 for (id = 0; id < MAX_SBS_BAT; ++id)
944 if ((sbs->batteries_supported & (1 << id)))
945 acpi_battery_add(sbs, id);
946 } else
947 acpi_battery_add(sbs, 0);
948 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
949 end:
950 if (result)
951 acpi_sbs_remove(device, 0);
952 return result;
953}
954
955static int acpi_sbs_remove(struct acpi_device *device, int type)
956{
957 struct acpi_sbs *sbs;
958 int id;
959
960 if (!device)
961 return -EINVAL;
962 sbs = acpi_driver_data(device);
963 if (!sbs)
964 return -EINVAL;
965 mutex_lock(&sbs->lock);
966 acpi_smbus_unregister_callback(sbs->hc);
967 for (id = 0; id < MAX_SBS_BAT; ++id)
968 acpi_battery_remove(sbs, id);
969 acpi_charger_remove(sbs);
970 mutex_unlock(&sbs->lock);
971 mutex_destroy(&sbs->lock);
972 kfree(sbs);
973 return 0;
974}
975
976static void acpi_sbs_rmdirs(void)
977{
978#ifdef CONFIG_ACPI_PROCFS_POWER
979 if (acpi_ac_dir) {
980 acpi_unlock_ac_dir(acpi_ac_dir);
981 acpi_ac_dir = NULL;
982 }
983 if (acpi_battery_dir) {
984 acpi_unlock_battery_dir(acpi_battery_dir);
985 acpi_battery_dir = NULL;
986 }
987#endif
988}
989
990static int acpi_sbs_resume(struct acpi_device *device)
991{
992 struct acpi_sbs *sbs;
993 if (!device)
994 return -EINVAL;
995 sbs = device->driver_data;
996 acpi_sbs_callback(sbs);
997 return 0;
998}
999
1000static struct acpi_driver acpi_sbs_driver = {
1001 .name = "sbs",
1002 .class = ACPI_SBS_CLASS,
1003 .ids = sbs_device_ids,
1004 .ops = {
1005 .add = acpi_sbs_add,
1006 .remove = acpi_sbs_remove,
1007 .resume = acpi_sbs_resume,
1008 },
1009};
1010
1011static int __init acpi_sbs_init(void)
1012{
1013 int result = 0;
1014
1015 if (acpi_disabled)
1016 return -ENODEV;
1017#ifdef CONFIG_ACPI_PROCFS_POWER
1018 acpi_ac_dir = acpi_lock_ac_dir();
1019 if (!acpi_ac_dir)
1020 return -ENODEV;
1021 acpi_battery_dir = acpi_lock_battery_dir();
1022 if (!acpi_battery_dir) {
1023 acpi_sbs_rmdirs();
1024 return -ENODEV;
1025 }
1026#endif
1027 result = acpi_bus_register_driver(&acpi_sbs_driver);
1028 if (result < 0) {
1029 acpi_sbs_rmdirs();
1030 return -ENODEV;
1031 }
1032 return 0;
1033}
1034
1035static void __exit acpi_sbs_exit(void)
1036{
1037 acpi_bus_unregister_driver(&acpi_sbs_driver);
1038 acpi_sbs_rmdirs();
1039 return;
1040}
1041
1042module_init(acpi_sbs_init);
1043module_exit(acpi_sbs_exit);