Loading...
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
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 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
117struct 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
133static int acpi_sbs_remove(struct acpi_device *device, int type);
134static int acpi_battery_get_state(struct acpi_battery *battery);
135
136static inline int battery_scale(int log)
137{
138 int scale = 1;
139 while (log--)
140 scale *= 10;
141 return scale;
142}
143
144static inline int acpi_battery_vscale(struct acpi_battery *battery)
145{
146 return battery_scale((battery->spec & 0x0f00) >> 8);
147}
148
149static inline int acpi_battery_ipscale(struct acpi_battery *battery)
150{
151 return battery_scale((battery->spec & 0xf000) >> 12);
152}
153
154static inline int acpi_battery_mode(struct acpi_battery *battery)
155{
156 return (battery->mode & 0x8000);
157}
158
159static inline int acpi_battery_scale(struct acpi_battery *battery)
160{
161 return (acpi_battery_mode(battery) ? 10 : 1) *
162 acpi_battery_ipscale(battery);
163}
164
165static int sbs_get_ac_property(struct power_supply *psy,
166 enum power_supply_property psp,
167 union power_supply_propval *val)
168{
169 struct acpi_sbs *sbs = to_acpi_sbs(psy);
170 switch (psp) {
171 case POWER_SUPPLY_PROP_ONLINE:
172 val->intval = sbs->charger_present;
173 break;
174 default:
175 return -EINVAL;
176 }
177 return 0;
178}
179
180static int acpi_battery_technology(struct acpi_battery *battery)
181{
182 if (!strcasecmp("NiCd", battery->device_chemistry))
183 return POWER_SUPPLY_TECHNOLOGY_NiCd;
184 if (!strcasecmp("NiMH", battery->device_chemistry))
185 return POWER_SUPPLY_TECHNOLOGY_NiMH;
186 if (!strcasecmp("LION", battery->device_chemistry))
187 return POWER_SUPPLY_TECHNOLOGY_LION;
188 if (!strcasecmp("LiP", battery->device_chemistry))
189 return POWER_SUPPLY_TECHNOLOGY_LIPO;
190 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
191}
192
193static int acpi_sbs_battery_get_property(struct power_supply *psy,
194 enum power_supply_property psp,
195 union power_supply_propval *val)
196{
197 struct acpi_battery *battery = to_acpi_battery(psy);
198
199 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
200 return -ENODEV;
201
202 acpi_battery_get_state(battery);
203 switch (psp) {
204 case POWER_SUPPLY_PROP_STATUS:
205 if (battery->rate_now < 0)
206 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
207 else if (battery->rate_now > 0)
208 val->intval = POWER_SUPPLY_STATUS_CHARGING;
209 else
210 val->intval = POWER_SUPPLY_STATUS_FULL;
211 break;
212 case POWER_SUPPLY_PROP_PRESENT:
213 val->intval = battery->present;
214 break;
215 case POWER_SUPPLY_PROP_TECHNOLOGY:
216 val->intval = acpi_battery_technology(battery);
217 break;
218 case POWER_SUPPLY_PROP_CYCLE_COUNT:
219 val->intval = battery->cycle_count;
220 break;
221 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
222 val->intval = battery->design_voltage *
223 acpi_battery_vscale(battery) * 1000;
224 break;
225 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
226 val->intval = battery->voltage_now *
227 acpi_battery_vscale(battery) * 1000;
228 break;
229 case POWER_SUPPLY_PROP_CURRENT_NOW:
230 case POWER_SUPPLY_PROP_POWER_NOW:
231 val->intval = abs(battery->rate_now) *
232 acpi_battery_ipscale(battery) * 1000;
233 val->intval *= (acpi_battery_mode(battery)) ?
234 (battery->voltage_now *
235 acpi_battery_vscale(battery) / 1000) : 1;
236 break;
237 case POWER_SUPPLY_PROP_CURRENT_AVG:
238 case POWER_SUPPLY_PROP_POWER_AVG:
239 val->intval = abs(battery->rate_avg) *
240 acpi_battery_ipscale(battery) * 1000;
241 val->intval *= (acpi_battery_mode(battery)) ?
242 (battery->voltage_now *
243 acpi_battery_vscale(battery) / 1000) : 1;
244 break;
245 case POWER_SUPPLY_PROP_CAPACITY:
246 val->intval = battery->state_of_charge;
247 break;
248 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
249 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
250 val->intval = battery->design_capacity *
251 acpi_battery_scale(battery) * 1000;
252 break;
253 case POWER_SUPPLY_PROP_CHARGE_FULL:
254 case POWER_SUPPLY_PROP_ENERGY_FULL:
255 val->intval = battery->full_charge_capacity *
256 acpi_battery_scale(battery) * 1000;
257 break;
258 case POWER_SUPPLY_PROP_CHARGE_NOW:
259 case POWER_SUPPLY_PROP_ENERGY_NOW:
260 val->intval = battery->capacity_now *
261 acpi_battery_scale(battery) * 1000;
262 break;
263 case POWER_SUPPLY_PROP_TEMP:
264 val->intval = battery->temp_now - 2730; // dK -> dC
265 break;
266 case POWER_SUPPLY_PROP_MODEL_NAME:
267 val->strval = battery->device_name;
268 break;
269 case POWER_SUPPLY_PROP_MANUFACTURER:
270 val->strval = battery->manufacturer_name;
271 break;
272 default:
273 return -EINVAL;
274 }
275 return 0;
276}
277
278static enum power_supply_property sbs_ac_props[] = {
279 POWER_SUPPLY_PROP_ONLINE,
280};
281
282static enum power_supply_property sbs_charge_battery_props[] = {
283 POWER_SUPPLY_PROP_STATUS,
284 POWER_SUPPLY_PROP_PRESENT,
285 POWER_SUPPLY_PROP_TECHNOLOGY,
286 POWER_SUPPLY_PROP_CYCLE_COUNT,
287 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
288 POWER_SUPPLY_PROP_VOLTAGE_NOW,
289 POWER_SUPPLY_PROP_CURRENT_NOW,
290 POWER_SUPPLY_PROP_CURRENT_AVG,
291 POWER_SUPPLY_PROP_CAPACITY,
292 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
293 POWER_SUPPLY_PROP_CHARGE_FULL,
294 POWER_SUPPLY_PROP_CHARGE_NOW,
295 POWER_SUPPLY_PROP_TEMP,
296 POWER_SUPPLY_PROP_MODEL_NAME,
297 POWER_SUPPLY_PROP_MANUFACTURER,
298};
299
300static enum power_supply_property sbs_energy_battery_props[] = {
301 POWER_SUPPLY_PROP_STATUS,
302 POWER_SUPPLY_PROP_PRESENT,
303 POWER_SUPPLY_PROP_TECHNOLOGY,
304 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
305 POWER_SUPPLY_PROP_VOLTAGE_NOW,
306 POWER_SUPPLY_PROP_CURRENT_NOW,
307 POWER_SUPPLY_PROP_CURRENT_AVG,
308 POWER_SUPPLY_PROP_POWER_NOW,
309 POWER_SUPPLY_PROP_POWER_AVG,
310 POWER_SUPPLY_PROP_CAPACITY,
311 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
312 POWER_SUPPLY_PROP_ENERGY_FULL,
313 POWER_SUPPLY_PROP_ENERGY_NOW,
314 POWER_SUPPLY_PROP_TEMP,
315 POWER_SUPPLY_PROP_MODEL_NAME,
316 POWER_SUPPLY_PROP_MANUFACTURER,
317};
318
319
320/* --------------------------------------------------------------------------
321 Smart Battery System Management
322 -------------------------------------------------------------------------- */
323
324struct acpi_battery_reader {
325 u8 command; /* command for battery */
326 u8 mode; /* word or block? */
327 size_t offset; /* offset inside struct acpi_sbs_battery */
328};
329
330static struct acpi_battery_reader info_readers[] = {
331 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
332 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
333 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
334 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
335 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
336 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
337 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
338 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
339 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
340 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
341 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
342};
343
344static struct acpi_battery_reader state_readers[] = {
345 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
346 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
347 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
348 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
349 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
350 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
351 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
352};
353
354static int acpi_manager_get_info(struct acpi_sbs *sbs)
355{
356 int result = 0;
357 u16 battery_system_info;
358
359 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
360 0x04, (u8 *)&battery_system_info);
361 if (!result)
362 sbs->batteries_supported = battery_system_info & 0x000f;
363 return result;
364}
365
366static int acpi_battery_get_info(struct acpi_battery *battery)
367{
368 int i, result = 0;
369
370 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
371 result = acpi_smbus_read(battery->sbs->hc,
372 info_readers[i].mode,
373 ACPI_SBS_BATTERY,
374 info_readers[i].command,
375 (u8 *) battery +
376 info_readers[i].offset);
377 if (result)
378 break;
379 }
380 return result;
381}
382
383static int acpi_battery_get_state(struct acpi_battery *battery)
384{
385 int i, result = 0;
386
387 if (battery->update_time &&
388 time_before(jiffies, battery->update_time +
389 msecs_to_jiffies(cache_time)))
390 return 0;
391 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
392 result = acpi_smbus_read(battery->sbs->hc,
393 state_readers[i].mode,
394 ACPI_SBS_BATTERY,
395 state_readers[i].command,
396 (u8 *)battery +
397 state_readers[i].offset);
398 if (result)
399 goto end;
400 }
401 end:
402 battery->update_time = jiffies;
403 return result;
404}
405
406static int acpi_battery_get_alarm(struct acpi_battery *battery)
407{
408 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
409 ACPI_SBS_BATTERY, 0x01,
410 (u8 *)&battery->alarm_capacity);
411}
412
413static int acpi_battery_set_alarm(struct acpi_battery *battery)
414{
415 struct acpi_sbs *sbs = battery->sbs;
416 u16 value, sel = 1 << (battery->id + 12);
417
418 int ret;
419
420
421 if (sbs->manager_present) {
422 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
423 0x01, (u8 *)&value);
424 if (ret)
425 goto end;
426 if ((value & 0xf000) != sel) {
427 value &= 0x0fff;
428 value |= sel;
429 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
430 ACPI_SBS_MANAGER,
431 0x01, (u8 *)&value, 2);
432 if (ret)
433 goto end;
434 }
435 }
436 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
437 0x01, (u8 *)&battery->alarm_capacity, 2);
438 end:
439 return ret;
440}
441
442static int acpi_ac_get_present(struct acpi_sbs *sbs)
443{
444 int result;
445 u16 status;
446
447 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
448 0x13, (u8 *) & status);
449 if (!result)
450 sbs->charger_present = (status >> 15) & 0x1;
451 return result;
452}
453
454static ssize_t acpi_battery_alarm_show(struct device *dev,
455 struct device_attribute *attr,
456 char *buf)
457{
458 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
459 acpi_battery_get_alarm(battery);
460 return sprintf(buf, "%d\n", battery->alarm_capacity *
461 acpi_battery_scale(battery) * 1000);
462}
463
464static ssize_t acpi_battery_alarm_store(struct device *dev,
465 struct device_attribute *attr,
466 const char *buf, size_t count)
467{
468 unsigned long x;
469 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
470 if (sscanf(buf, "%ld\n", &x) == 1)
471 battery->alarm_capacity = x /
472 (1000 * acpi_battery_scale(battery));
473 if (battery->present)
474 acpi_battery_set_alarm(battery);
475 return count;
476}
477
478static struct device_attribute alarm_attr = {
479 .attr = {.name = "alarm", .mode = 0644},
480 .show = acpi_battery_alarm_show,
481 .store = acpi_battery_alarm_store,
482};
483
484/* --------------------------------------------------------------------------
485 FS Interface (/proc/acpi)
486 -------------------------------------------------------------------------- */
487
488#ifdef CONFIG_ACPI_PROCFS_POWER
489/* Generic Routines */
490static int
491acpi_sbs_add_fs(struct proc_dir_entry **dir,
492 struct proc_dir_entry *parent_dir,
493 char *dir_name,
494 const struct file_operations *info_fops,
495 const struct file_operations *state_fops,
496 const struct file_operations *alarm_fops, void *data)
497{
498 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for SBS is loaded,"
499 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
500 if (!*dir) {
501 *dir = proc_mkdir(dir_name, parent_dir);
502 if (!*dir) {
503 return -ENODEV;
504 }
505 }
506
507 /* 'info' [R] */
508 if (info_fops)
509 proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
510 info_fops, data);
511
512 /* 'state' [R] */
513 if (state_fops)
514 proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
515 state_fops, data);
516
517 /* 'alarm' [R/W] */
518 if (alarm_fops)
519 proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
520 alarm_fops, data);
521 return 0;
522}
523
524static void
525acpi_sbs_remove_fs(struct proc_dir_entry **dir,
526 struct proc_dir_entry *parent_dir)
527{
528 if (*dir) {
529 remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
530 remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
531 remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
532 remove_proc_entry((*dir)->name, parent_dir);
533 *dir = NULL;
534 }
535}
536
537/* Smart Battery Interface */
538static struct proc_dir_entry *acpi_battery_dir = NULL;
539
540static inline char *acpi_battery_units(struct acpi_battery *battery)
541{
542 return acpi_battery_mode(battery) ? " mW" : " mA";
543}
544
545
546static int acpi_battery_read_info(struct seq_file *seq, void *offset)
547{
548 struct acpi_battery *battery = seq->private;
549 struct acpi_sbs *sbs = battery->sbs;
550 int result = 0;
551
552 mutex_lock(&sbs->lock);
553
554 seq_printf(seq, "present: %s\n",
555 (battery->present) ? "yes" : "no");
556 if (!battery->present)
557 goto end;
558
559 seq_printf(seq, "design capacity: %i%sh\n",
560 battery->design_capacity * acpi_battery_scale(battery),
561 acpi_battery_units(battery));
562 seq_printf(seq, "last full capacity: %i%sh\n",
563 battery->full_charge_capacity * acpi_battery_scale(battery),
564 acpi_battery_units(battery));
565 seq_printf(seq, "battery technology: rechargeable\n");
566 seq_printf(seq, "design voltage: %i mV\n",
567 battery->design_voltage * acpi_battery_vscale(battery));
568 seq_printf(seq, "design capacity warning: unknown\n");
569 seq_printf(seq, "design capacity low: unknown\n");
570 seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
571 seq_printf(seq, "capacity granularity 1: unknown\n");
572 seq_printf(seq, "capacity granularity 2: unknown\n");
573 seq_printf(seq, "model number: %s\n", battery->device_name);
574 seq_printf(seq, "serial number: %i\n",
575 battery->serial_number);
576 seq_printf(seq, "battery type: %s\n",
577 battery->device_chemistry);
578 seq_printf(seq, "OEM info: %s\n",
579 battery->manufacturer_name);
580 end:
581 mutex_unlock(&sbs->lock);
582 return result;
583}
584
585static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
586{
587 return single_open(file, acpi_battery_read_info, PDE(inode)->data);
588}
589
590static int acpi_battery_read_state(struct seq_file *seq, void *offset)
591{
592 struct acpi_battery *battery = seq->private;
593 struct acpi_sbs *sbs = battery->sbs;
594 int rate;
595
596 mutex_lock(&sbs->lock);
597 seq_printf(seq, "present: %s\n",
598 (battery->present) ? "yes" : "no");
599 if (!battery->present)
600 goto end;
601
602 acpi_battery_get_state(battery);
603 seq_printf(seq, "capacity state: %s\n",
604 (battery->state & 0x0010) ? "critical" : "ok");
605 seq_printf(seq, "charging state: %s\n",
606 (battery->rate_now < 0) ? "discharging" :
607 ((battery->rate_now > 0) ? "charging" : "charged"));
608 rate = abs(battery->rate_now) * acpi_battery_ipscale(battery);
609 rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
610 acpi_battery_vscale(battery)/1000):1;
611 seq_printf(seq, "present rate: %d%s\n", rate,
612 acpi_battery_units(battery));
613 seq_printf(seq, "remaining capacity: %i%sh\n",
614 battery->capacity_now * acpi_battery_scale(battery),
615 acpi_battery_units(battery));
616 seq_printf(seq, "present voltage: %i mV\n",
617 battery->voltage_now * acpi_battery_vscale(battery));
618
619 end:
620 mutex_unlock(&sbs->lock);
621 return 0;
622}
623
624static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
625{
626 return single_open(file, acpi_battery_read_state, PDE(inode)->data);
627}
628
629static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
630{
631 struct acpi_battery *battery = seq->private;
632 struct acpi_sbs *sbs = battery->sbs;
633 int result = 0;
634
635 mutex_lock(&sbs->lock);
636
637 if (!battery->present) {
638 seq_printf(seq, "present: no\n");
639 goto end;
640 }
641
642 acpi_battery_get_alarm(battery);
643 seq_printf(seq, "alarm: ");
644 if (battery->alarm_capacity)
645 seq_printf(seq, "%i%sh\n",
646 battery->alarm_capacity *
647 acpi_battery_scale(battery),
648 acpi_battery_units(battery));
649 else
650 seq_printf(seq, "disabled\n");
651 end:
652 mutex_unlock(&sbs->lock);
653 return result;
654}
655
656static ssize_t
657acpi_battery_write_alarm(struct file *file, const char __user * buffer,
658 size_t count, loff_t * ppos)
659{
660 struct seq_file *seq = file->private_data;
661 struct acpi_battery *battery = seq->private;
662 struct acpi_sbs *sbs = battery->sbs;
663 char alarm_string[12] = { '\0' };
664 int result = 0;
665 mutex_lock(&sbs->lock);
666 if (!battery->present) {
667 result = -ENODEV;
668 goto end;
669 }
670 if (count > sizeof(alarm_string) - 1) {
671 result = -EINVAL;
672 goto end;
673 }
674 if (copy_from_user(alarm_string, buffer, count)) {
675 result = -EFAULT;
676 goto end;
677 }
678 alarm_string[count] = 0;
679 battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
680 acpi_battery_scale(battery);
681 acpi_battery_set_alarm(battery);
682 end:
683 mutex_unlock(&sbs->lock);
684 if (result)
685 return result;
686 return count;
687}
688
689static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
690{
691 return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
692}
693
694static const struct file_operations acpi_battery_info_fops = {
695 .open = acpi_battery_info_open_fs,
696 .read = seq_read,
697 .llseek = seq_lseek,
698 .release = single_release,
699 .owner = THIS_MODULE,
700};
701
702static const struct file_operations acpi_battery_state_fops = {
703 .open = acpi_battery_state_open_fs,
704 .read = seq_read,
705 .llseek = seq_lseek,
706 .release = single_release,
707 .owner = THIS_MODULE,
708};
709
710static const struct file_operations acpi_battery_alarm_fops = {
711 .open = acpi_battery_alarm_open_fs,
712 .read = seq_read,
713 .write = acpi_battery_write_alarm,
714 .llseek = seq_lseek,
715 .release = single_release,
716 .owner = THIS_MODULE,
717};
718
719/* Legacy AC Adapter Interface */
720
721static struct proc_dir_entry *acpi_ac_dir = NULL;
722
723static int acpi_ac_read_state(struct seq_file *seq, void *offset)
724{
725
726 struct acpi_sbs *sbs = seq->private;
727
728 mutex_lock(&sbs->lock);
729
730 seq_printf(seq, "state: %s\n",
731 sbs->charger_present ? "on-line" : "off-line");
732
733 mutex_unlock(&sbs->lock);
734 return 0;
735}
736
737static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
738{
739 return single_open(file, acpi_ac_read_state, PDE(inode)->data);
740}
741
742static const struct file_operations acpi_ac_state_fops = {
743 .open = acpi_ac_state_open_fs,
744 .read = seq_read,
745 .llseek = seq_lseek,
746 .release = single_release,
747 .owner = THIS_MODULE,
748};
749
750#endif
751
752/* --------------------------------------------------------------------------
753 Driver Interface
754 -------------------------------------------------------------------------- */
755static int acpi_battery_read(struct acpi_battery *battery)
756{
757 int result = 0, saved_present = battery->present;
758 u16 state;
759
760 if (battery->sbs->manager_present) {
761 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
762 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
763 if (!result)
764 battery->present = state & (1 << battery->id);
765 state &= 0x0fff;
766 state |= 1 << (battery->id + 12);
767 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
768 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
769 } else if (battery->id == 0)
770 battery->present = 1;
771 if (result || !battery->present)
772 return result;
773
774 if (saved_present != battery->present) {
775 battery->update_time = 0;
776 result = acpi_battery_get_info(battery);
777 if (result)
778 return result;
779 }
780 result = acpi_battery_get_state(battery);
781 return result;
782}
783
784/* Smart Battery */
785static int acpi_battery_add(struct acpi_sbs *sbs, int id)
786{
787 struct acpi_battery *battery = &sbs->battery[id];
788 int result;
789
790 battery->id = id;
791 battery->sbs = sbs;
792 result = acpi_battery_read(battery);
793 if (result)
794 return result;
795
796 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
797#ifdef CONFIG_ACPI_PROCFS_POWER
798 acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
799 battery->name, &acpi_battery_info_fops,
800 &acpi_battery_state_fops, &acpi_battery_alarm_fops,
801 battery);
802#endif
803 battery->bat.name = battery->name;
804 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
805 if (!acpi_battery_mode(battery)) {
806 battery->bat.properties = sbs_charge_battery_props;
807 battery->bat.num_properties =
808 ARRAY_SIZE(sbs_charge_battery_props);
809 } else {
810 battery->bat.properties = sbs_energy_battery_props;
811 battery->bat.num_properties =
812 ARRAY_SIZE(sbs_energy_battery_props);
813 }
814 battery->bat.get_property = acpi_sbs_battery_get_property;
815 result = power_supply_register(&sbs->device->dev, &battery->bat);
816 if (result)
817 goto end;
818 result = device_create_file(battery->bat.dev, &alarm_attr);
819 if (result)
820 goto end;
821 battery->have_sysfs_alarm = 1;
822 end:
823 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
824 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
825 battery->name, battery->present ? "present" : "absent");
826 return result;
827}
828
829static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
830{
831 struct acpi_battery *battery = &sbs->battery[id];
832
833 if (battery->bat.dev) {
834 if (battery->have_sysfs_alarm)
835 device_remove_file(battery->bat.dev, &alarm_attr);
836 power_supply_unregister(&battery->bat);
837 }
838#ifdef CONFIG_ACPI_PROCFS_POWER
839 if (battery->proc_entry)
840 acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
841#endif
842}
843
844static int acpi_charger_add(struct acpi_sbs *sbs)
845{
846 int result;
847
848 result = acpi_ac_get_present(sbs);
849 if (result)
850 goto end;
851#ifdef CONFIG_ACPI_PROCFS_POWER
852 result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
853 ACPI_AC_DIR_NAME, NULL,
854 &acpi_ac_state_fops, NULL, sbs);
855 if (result)
856 goto end;
857#endif
858 sbs->charger.name = "sbs-charger";
859 sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
860 sbs->charger.properties = sbs_ac_props;
861 sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
862 sbs->charger.get_property = sbs_get_ac_property;
863 power_supply_register(&sbs->device->dev, &sbs->charger);
864 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
865 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
866 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
867 end:
868 return result;
869}
870
871static void acpi_charger_remove(struct acpi_sbs *sbs)
872{
873 if (sbs->charger.dev)
874 power_supply_unregister(&sbs->charger);
875#ifdef CONFIG_ACPI_PROCFS_POWER
876 if (sbs->charger_entry)
877 acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
878#endif
879}
880
881static void acpi_sbs_callback(void *context)
882{
883 int id;
884 struct acpi_sbs *sbs = context;
885 struct acpi_battery *bat;
886 u8 saved_charger_state = sbs->charger_present;
887 u8 saved_battery_state;
888 acpi_ac_get_present(sbs);
889 if (sbs->charger_present != saved_charger_state) {
890#ifdef CONFIG_ACPI_PROC_EVENT
891 acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
892 ACPI_SBS_NOTIFY_STATUS,
893 sbs->charger_present);
894#endif
895 kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
896 }
897 if (sbs->manager_present) {
898 for (id = 0; id < MAX_SBS_BAT; ++id) {
899 if (!(sbs->batteries_supported & (1 << id)))
900 continue;
901 bat = &sbs->battery[id];
902 saved_battery_state = bat->present;
903 acpi_battery_read(bat);
904 if (saved_battery_state == bat->present)
905 continue;
906#ifdef CONFIG_ACPI_PROC_EVENT
907 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
908 bat->name,
909 ACPI_SBS_NOTIFY_STATUS,
910 bat->present);
911#endif
912 kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
913 }
914 }
915}
916
917static int acpi_sbs_add(struct acpi_device *device)
918{
919 struct acpi_sbs *sbs;
920 int result = 0;
921 int id;
922
923 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
924 if (!sbs) {
925 result = -ENOMEM;
926 goto end;
927 }
928
929 mutex_init(&sbs->lock);
930
931 sbs->hc = acpi_driver_data(device->parent);
932 sbs->device = device;
933 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
934 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
935 device->driver_data = sbs;
936
937 result = acpi_charger_add(sbs);
938 if (result)
939 goto end;
940
941 result = acpi_manager_get_info(sbs);
942 if (!result) {
943 sbs->manager_present = 1;
944 for (id = 0; id < MAX_SBS_BAT; ++id)
945 if ((sbs->batteries_supported & (1 << id)))
946 acpi_battery_add(sbs, id);
947 } else
948 acpi_battery_add(sbs, 0);
949 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
950 end:
951 if (result)
952 acpi_sbs_remove(device, 0);
953 return result;
954}
955
956static int acpi_sbs_remove(struct acpi_device *device, int type)
957{
958 struct acpi_sbs *sbs;
959 int id;
960
961 if (!device)
962 return -EINVAL;
963 sbs = acpi_driver_data(device);
964 if (!sbs)
965 return -EINVAL;
966 mutex_lock(&sbs->lock);
967 acpi_smbus_unregister_callback(sbs->hc);
968 for (id = 0; id < MAX_SBS_BAT; ++id)
969 acpi_battery_remove(sbs, id);
970 acpi_charger_remove(sbs);
971 mutex_unlock(&sbs->lock);
972 mutex_destroy(&sbs->lock);
973 kfree(sbs);
974 return 0;
975}
976
977static void acpi_sbs_rmdirs(void)
978{
979#ifdef CONFIG_ACPI_PROCFS_POWER
980 if (acpi_ac_dir) {
981 acpi_unlock_ac_dir(acpi_ac_dir);
982 acpi_ac_dir = NULL;
983 }
984 if (acpi_battery_dir) {
985 acpi_unlock_battery_dir(acpi_battery_dir);
986 acpi_battery_dir = NULL;
987 }
988#endif
989}
990
991static int acpi_sbs_resume(struct acpi_device *device)
992{
993 struct acpi_sbs *sbs;
994 if (!device)
995 return -EINVAL;
996 sbs = device->driver_data;
997 acpi_sbs_callback(sbs);
998 return 0;
999}
1000
1001static struct acpi_driver acpi_sbs_driver = {
1002 .name = "sbs",
1003 .class = ACPI_SBS_CLASS,
1004 .ids = sbs_device_ids,
1005 .ops = {
1006 .add = acpi_sbs_add,
1007 .remove = acpi_sbs_remove,
1008 .resume = acpi_sbs_resume,
1009 },
1010};
1011
1012static int __init acpi_sbs_init(void)
1013{
1014 int result = 0;
1015
1016 if (acpi_disabled)
1017 return -ENODEV;
1018#ifdef CONFIG_ACPI_PROCFS_POWER
1019 acpi_ac_dir = acpi_lock_ac_dir();
1020 if (!acpi_ac_dir)
1021 return -ENODEV;
1022 acpi_battery_dir = acpi_lock_battery_dir();
1023 if (!acpi_battery_dir) {
1024 acpi_sbs_rmdirs();
1025 return -ENODEV;
1026 }
1027#endif
1028 result = acpi_bus_register_driver(&acpi_sbs_driver);
1029 if (result < 0) {
1030 acpi_sbs_rmdirs();
1031 return -ENODEV;
1032 }
1033 return 0;
1034}
1035
1036static void __exit acpi_sbs_exit(void)
1037{
1038 acpi_bus_unregister_driver(&acpi_sbs_driver);
1039 acpi_sbs_rmdirs();
1040 return;
1041}
1042
1043module_init(acpi_sbs_init);
1044module_exit(acpi_sbs_exit);
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 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
21 */
22
23#include <linux/init.h>
24#include <linux/slab.h>
25#include <linux/module.h>
26#include <linux/moduleparam.h>
27#include <linux/kernel.h>
28
29#include <linux/acpi.h>
30#include <linux/timer.h>
31#include <linux/jiffies.h>
32#include <linux/delay.h>
33#include <linux/power_supply.h>
34#include <linux/dmi.h>
35
36#include "sbshc.h"
37#include "battery.h"
38
39#define PREFIX "ACPI: "
40
41#define ACPI_SBS_CLASS "sbs"
42#define ACPI_AC_CLASS "ac_adapter"
43#define ACPI_SBS_DEVICE_NAME "Smart Battery System"
44#define ACPI_SBS_FILE_INFO "info"
45#define ACPI_SBS_FILE_STATE "state"
46#define ACPI_SBS_FILE_ALARM "alarm"
47#define ACPI_BATTERY_DIR_NAME "BAT%i"
48#define ACPI_AC_DIR_NAME "AC0"
49
50#define ACPI_SBS_NOTIFY_STATUS 0x80
51#define ACPI_SBS_NOTIFY_INFO 0x81
52
53MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
54MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
55MODULE_LICENSE("GPL");
56
57static unsigned int cache_time = 1000;
58module_param(cache_time, uint, 0644);
59MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
60
61static bool sbs_manager_broken;
62
63#define MAX_SBS_BAT 4
64#define ACPI_SBS_BLOCK_MAX 32
65
66static const struct acpi_device_id sbs_device_ids[] = {
67 {"ACPI0002", 0},
68 {"", 0},
69};
70MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
71
72struct acpi_battery {
73 struct power_supply *bat;
74 struct power_supply_desc bat_desc;
75 struct acpi_sbs *sbs;
76 unsigned long update_time;
77 char name[8];
78 char manufacturer_name[ACPI_SBS_BLOCK_MAX];
79 char device_name[ACPI_SBS_BLOCK_MAX];
80 char device_chemistry[ACPI_SBS_BLOCK_MAX];
81 u16 alarm_capacity;
82 u16 full_charge_capacity;
83 u16 design_capacity;
84 u16 design_voltage;
85 u16 serial_number;
86 u16 cycle_count;
87 u16 temp_now;
88 u16 voltage_now;
89 s16 rate_now;
90 s16 rate_avg;
91 u16 capacity_now;
92 u16 state_of_charge;
93 u16 state;
94 u16 mode;
95 u16 spec;
96 u8 id;
97 u8 present:1;
98 u8 have_sysfs_alarm:1;
99};
100
101#define to_acpi_battery(x) power_supply_get_drvdata(x)
102
103struct acpi_sbs {
104 struct power_supply *charger;
105 struct acpi_device *device;
106 struct acpi_smb_hc *hc;
107 struct mutex lock;
108 struct acpi_battery battery[MAX_SBS_BAT];
109 u8 batteries_supported:4;
110 u8 manager_present:1;
111 u8 charger_present:1;
112 u8 charger_exists:1;
113};
114
115#define to_acpi_sbs(x) power_supply_get_drvdata(x)
116
117static int acpi_sbs_remove(struct acpi_device *device);
118static int acpi_battery_get_state(struct acpi_battery *battery);
119
120static inline int battery_scale(int log)
121{
122 int scale = 1;
123 while (log--)
124 scale *= 10;
125 return scale;
126}
127
128static inline int acpi_battery_vscale(struct acpi_battery *battery)
129{
130 return battery_scale((battery->spec & 0x0f00) >> 8);
131}
132
133static inline int acpi_battery_ipscale(struct acpi_battery *battery)
134{
135 return battery_scale((battery->spec & 0xf000) >> 12);
136}
137
138static inline int acpi_battery_mode(struct acpi_battery *battery)
139{
140 return (battery->mode & 0x8000);
141}
142
143static inline int acpi_battery_scale(struct acpi_battery *battery)
144{
145 return (acpi_battery_mode(battery) ? 10 : 1) *
146 acpi_battery_ipscale(battery);
147}
148
149static int sbs_get_ac_property(struct power_supply *psy,
150 enum power_supply_property psp,
151 union power_supply_propval *val)
152{
153 struct acpi_sbs *sbs = to_acpi_sbs(psy);
154 switch (psp) {
155 case POWER_SUPPLY_PROP_ONLINE:
156 val->intval = sbs->charger_present;
157 break;
158 default:
159 return -EINVAL;
160 }
161 return 0;
162}
163
164static int acpi_battery_technology(struct acpi_battery *battery)
165{
166 if (!strcasecmp("NiCd", battery->device_chemistry))
167 return POWER_SUPPLY_TECHNOLOGY_NiCd;
168 if (!strcasecmp("NiMH", battery->device_chemistry))
169 return POWER_SUPPLY_TECHNOLOGY_NiMH;
170 if (!strcasecmp("LION", battery->device_chemistry))
171 return POWER_SUPPLY_TECHNOLOGY_LION;
172 if (!strcasecmp("LiP", battery->device_chemistry))
173 return POWER_SUPPLY_TECHNOLOGY_LIPO;
174 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
175}
176
177static int acpi_sbs_battery_get_property(struct power_supply *psy,
178 enum power_supply_property psp,
179 union power_supply_propval *val)
180{
181 struct acpi_battery *battery = to_acpi_battery(psy);
182
183 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
184 return -ENODEV;
185
186 acpi_battery_get_state(battery);
187 switch (psp) {
188 case POWER_SUPPLY_PROP_STATUS:
189 if (battery->rate_now < 0)
190 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
191 else if (battery->rate_now > 0)
192 val->intval = POWER_SUPPLY_STATUS_CHARGING;
193 else
194 val->intval = POWER_SUPPLY_STATUS_FULL;
195 break;
196 case POWER_SUPPLY_PROP_PRESENT:
197 val->intval = battery->present;
198 break;
199 case POWER_SUPPLY_PROP_TECHNOLOGY:
200 val->intval = acpi_battery_technology(battery);
201 break;
202 case POWER_SUPPLY_PROP_CYCLE_COUNT:
203 val->intval = battery->cycle_count;
204 break;
205 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
206 val->intval = battery->design_voltage *
207 acpi_battery_vscale(battery) * 1000;
208 break;
209 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
210 val->intval = battery->voltage_now *
211 acpi_battery_vscale(battery) * 1000;
212 break;
213 case POWER_SUPPLY_PROP_CURRENT_NOW:
214 case POWER_SUPPLY_PROP_POWER_NOW:
215 val->intval = abs(battery->rate_now) *
216 acpi_battery_ipscale(battery) * 1000;
217 val->intval *= (acpi_battery_mode(battery)) ?
218 (battery->voltage_now *
219 acpi_battery_vscale(battery) / 1000) : 1;
220 break;
221 case POWER_SUPPLY_PROP_CURRENT_AVG:
222 case POWER_SUPPLY_PROP_POWER_AVG:
223 val->intval = abs(battery->rate_avg) *
224 acpi_battery_ipscale(battery) * 1000;
225 val->intval *= (acpi_battery_mode(battery)) ?
226 (battery->voltage_now *
227 acpi_battery_vscale(battery) / 1000) : 1;
228 break;
229 case POWER_SUPPLY_PROP_CAPACITY:
230 val->intval = battery->state_of_charge;
231 break;
232 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
233 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
234 val->intval = battery->design_capacity *
235 acpi_battery_scale(battery) * 1000;
236 break;
237 case POWER_SUPPLY_PROP_CHARGE_FULL:
238 case POWER_SUPPLY_PROP_ENERGY_FULL:
239 val->intval = battery->full_charge_capacity *
240 acpi_battery_scale(battery) * 1000;
241 break;
242 case POWER_SUPPLY_PROP_CHARGE_NOW:
243 case POWER_SUPPLY_PROP_ENERGY_NOW:
244 val->intval = battery->capacity_now *
245 acpi_battery_scale(battery) * 1000;
246 break;
247 case POWER_SUPPLY_PROP_TEMP:
248 val->intval = battery->temp_now - 2730; // dK -> dC
249 break;
250 case POWER_SUPPLY_PROP_MODEL_NAME:
251 val->strval = battery->device_name;
252 break;
253 case POWER_SUPPLY_PROP_MANUFACTURER:
254 val->strval = battery->manufacturer_name;
255 break;
256 default:
257 return -EINVAL;
258 }
259 return 0;
260}
261
262static enum power_supply_property sbs_ac_props[] = {
263 POWER_SUPPLY_PROP_ONLINE,
264};
265
266static enum power_supply_property sbs_charge_battery_props[] = {
267 POWER_SUPPLY_PROP_STATUS,
268 POWER_SUPPLY_PROP_PRESENT,
269 POWER_SUPPLY_PROP_TECHNOLOGY,
270 POWER_SUPPLY_PROP_CYCLE_COUNT,
271 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
272 POWER_SUPPLY_PROP_VOLTAGE_NOW,
273 POWER_SUPPLY_PROP_CURRENT_NOW,
274 POWER_SUPPLY_PROP_CURRENT_AVG,
275 POWER_SUPPLY_PROP_CAPACITY,
276 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
277 POWER_SUPPLY_PROP_CHARGE_FULL,
278 POWER_SUPPLY_PROP_CHARGE_NOW,
279 POWER_SUPPLY_PROP_TEMP,
280 POWER_SUPPLY_PROP_MODEL_NAME,
281 POWER_SUPPLY_PROP_MANUFACTURER,
282};
283
284static enum power_supply_property sbs_energy_battery_props[] = {
285 POWER_SUPPLY_PROP_STATUS,
286 POWER_SUPPLY_PROP_PRESENT,
287 POWER_SUPPLY_PROP_TECHNOLOGY,
288 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
289 POWER_SUPPLY_PROP_VOLTAGE_NOW,
290 POWER_SUPPLY_PROP_CURRENT_NOW,
291 POWER_SUPPLY_PROP_CURRENT_AVG,
292 POWER_SUPPLY_PROP_POWER_NOW,
293 POWER_SUPPLY_PROP_POWER_AVG,
294 POWER_SUPPLY_PROP_CAPACITY,
295 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
296 POWER_SUPPLY_PROP_ENERGY_FULL,
297 POWER_SUPPLY_PROP_ENERGY_NOW,
298 POWER_SUPPLY_PROP_TEMP,
299 POWER_SUPPLY_PROP_MODEL_NAME,
300 POWER_SUPPLY_PROP_MANUFACTURER,
301};
302
303static const struct power_supply_desc acpi_sbs_charger_desc = {
304 .name = "sbs-charger",
305 .type = POWER_SUPPLY_TYPE_MAINS,
306 .properties = sbs_ac_props,
307 .num_properties = ARRAY_SIZE(sbs_ac_props),
308 .get_property = sbs_get_ac_property,
309};
310
311/* --------------------------------------------------------------------------
312 Smart Battery System Management
313 -------------------------------------------------------------------------- */
314
315struct acpi_battery_reader {
316 u8 command; /* command for battery */
317 u8 mode; /* word or block? */
318 size_t offset; /* offset inside struct acpi_sbs_battery */
319};
320
321static struct acpi_battery_reader info_readers[] = {
322 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
323 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
324 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
325 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
326 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
327 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
328 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
329 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
330 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
331 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
332 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
333};
334
335static struct acpi_battery_reader state_readers[] = {
336 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
337 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
338 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
339 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
340 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
341 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
342 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
343};
344
345static int acpi_manager_get_info(struct acpi_sbs *sbs)
346{
347 int result = 0;
348 u16 battery_system_info;
349
350 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
351 0x04, (u8 *)&battery_system_info);
352 if (!result)
353 sbs->batteries_supported = battery_system_info & 0x000f;
354 return result;
355}
356
357static int acpi_battery_get_info(struct acpi_battery *battery)
358{
359 int i, result = 0;
360
361 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
362 result = acpi_smbus_read(battery->sbs->hc,
363 info_readers[i].mode,
364 ACPI_SBS_BATTERY,
365 info_readers[i].command,
366 (u8 *) battery +
367 info_readers[i].offset);
368 if (result)
369 break;
370 }
371 return result;
372}
373
374static int acpi_battery_get_state(struct acpi_battery *battery)
375{
376 int i, result = 0;
377
378 if (battery->update_time &&
379 time_before(jiffies, battery->update_time +
380 msecs_to_jiffies(cache_time)))
381 return 0;
382 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
383 result = acpi_smbus_read(battery->sbs->hc,
384 state_readers[i].mode,
385 ACPI_SBS_BATTERY,
386 state_readers[i].command,
387 (u8 *)battery +
388 state_readers[i].offset);
389 if (result)
390 goto end;
391 }
392 end:
393 battery->update_time = jiffies;
394 return result;
395}
396
397static int acpi_battery_get_alarm(struct acpi_battery *battery)
398{
399 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
400 ACPI_SBS_BATTERY, 0x01,
401 (u8 *)&battery->alarm_capacity);
402}
403
404static int acpi_battery_set_alarm(struct acpi_battery *battery)
405{
406 struct acpi_sbs *sbs = battery->sbs;
407 u16 value, sel = 1 << (battery->id + 12);
408
409 int ret;
410
411
412 if (sbs->manager_present) {
413 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
414 0x01, (u8 *)&value);
415 if (ret)
416 goto end;
417 if ((value & 0xf000) != sel) {
418 value &= 0x0fff;
419 value |= sel;
420 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
421 ACPI_SBS_MANAGER,
422 0x01, (u8 *)&value, 2);
423 if (ret)
424 goto end;
425 }
426 }
427 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
428 0x01, (u8 *)&battery->alarm_capacity, 2);
429 end:
430 return ret;
431}
432
433static int acpi_ac_get_present(struct acpi_sbs *sbs)
434{
435 int result;
436 u16 status;
437
438 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
439 0x13, (u8 *) & status);
440
441 if (result)
442 return result;
443
444 /*
445 * The spec requires that bit 4 always be 1. If it's not set, assume
446 * that the implementation doesn't support an SBS charger
447 */
448 if (!((status >> 4) & 0x1))
449 return -ENODEV;
450
451 sbs->charger_present = (status >> 15) & 0x1;
452 return 0;
453}
454
455static ssize_t acpi_battery_alarm_show(struct device *dev,
456 struct device_attribute *attr,
457 char *buf)
458{
459 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
460 acpi_battery_get_alarm(battery);
461 return sprintf(buf, "%d\n", battery->alarm_capacity *
462 acpi_battery_scale(battery) * 1000);
463}
464
465static ssize_t acpi_battery_alarm_store(struct device *dev,
466 struct device_attribute *attr,
467 const char *buf, size_t count)
468{
469 unsigned long x;
470 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
471 if (sscanf(buf, "%lu\n", &x) == 1)
472 battery->alarm_capacity = x /
473 (1000 * acpi_battery_scale(battery));
474 if (battery->present)
475 acpi_battery_set_alarm(battery);
476 return count;
477}
478
479static struct device_attribute alarm_attr = {
480 .attr = {.name = "alarm", .mode = 0644},
481 .show = acpi_battery_alarm_show,
482 .store = acpi_battery_alarm_store,
483};
484
485/* --------------------------------------------------------------------------
486 Driver Interface
487 -------------------------------------------------------------------------- */
488static int acpi_battery_read(struct acpi_battery *battery)
489{
490 int result = 0, saved_present = battery->present;
491 u16 state;
492
493 if (battery->sbs->manager_present) {
494 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
495 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
496 if (!result)
497 battery->present = state & (1 << battery->id);
498 state &= 0x0fff;
499 state |= 1 << (battery->id + 12);
500 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
501 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
502 } else if (battery->id == 0)
503 battery->present = 1;
504
505 if (result || !battery->present)
506 return result;
507
508 if (saved_present != battery->present) {
509 battery->update_time = 0;
510 result = acpi_battery_get_info(battery);
511 if (result) {
512 battery->present = 0;
513 return result;
514 }
515 }
516 result = acpi_battery_get_state(battery);
517 if (result)
518 battery->present = 0;
519 return result;
520}
521
522/* Smart Battery */
523static int acpi_battery_add(struct acpi_sbs *sbs, int id)
524{
525 struct acpi_battery *battery = &sbs->battery[id];
526 struct power_supply_config psy_cfg = { .drv_data = battery, };
527 int result;
528
529 battery->id = id;
530 battery->sbs = sbs;
531 result = acpi_battery_read(battery);
532 if (result)
533 return result;
534
535 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
536 battery->bat_desc.name = battery->name;
537 battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
538 if (!acpi_battery_mode(battery)) {
539 battery->bat_desc.properties = sbs_charge_battery_props;
540 battery->bat_desc.num_properties =
541 ARRAY_SIZE(sbs_charge_battery_props);
542 } else {
543 battery->bat_desc.properties = sbs_energy_battery_props;
544 battery->bat_desc.num_properties =
545 ARRAY_SIZE(sbs_energy_battery_props);
546 }
547 battery->bat_desc.get_property = acpi_sbs_battery_get_property;
548 battery->bat = power_supply_register(&sbs->device->dev,
549 &battery->bat_desc, &psy_cfg);
550 if (IS_ERR(battery->bat)) {
551 result = PTR_ERR(battery->bat);
552 battery->bat = NULL;
553 goto end;
554 }
555
556 result = device_create_file(&battery->bat->dev, &alarm_attr);
557 if (result)
558 goto end;
559 battery->have_sysfs_alarm = 1;
560 end:
561 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
562 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
563 battery->name, battery->present ? "present" : "absent");
564 return result;
565}
566
567static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
568{
569 struct acpi_battery *battery = &sbs->battery[id];
570
571 if (battery->bat) {
572 if (battery->have_sysfs_alarm)
573 device_remove_file(&battery->bat->dev, &alarm_attr);
574 power_supply_unregister(battery->bat);
575 }
576}
577
578static int acpi_charger_add(struct acpi_sbs *sbs)
579{
580 int result;
581 struct power_supply_config psy_cfg = { .drv_data = sbs, };
582
583 result = acpi_ac_get_present(sbs);
584 if (result)
585 goto end;
586
587 sbs->charger_exists = 1;
588 sbs->charger = power_supply_register(&sbs->device->dev,
589 &acpi_sbs_charger_desc, &psy_cfg);
590 if (IS_ERR(sbs->charger)) {
591 result = PTR_ERR(sbs->charger);
592 sbs->charger = NULL;
593 }
594 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
595 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
596 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
597 end:
598 return result;
599}
600
601static void acpi_charger_remove(struct acpi_sbs *sbs)
602{
603 if (sbs->charger)
604 power_supply_unregister(sbs->charger);
605}
606
607static void acpi_sbs_callback(void *context)
608{
609 int id;
610 struct acpi_sbs *sbs = context;
611 struct acpi_battery *bat;
612 u8 saved_charger_state = sbs->charger_present;
613 u8 saved_battery_state;
614
615 if (sbs->charger_exists) {
616 acpi_ac_get_present(sbs);
617 if (sbs->charger_present != saved_charger_state)
618 kobject_uevent(&sbs->charger->dev.kobj, KOBJ_CHANGE);
619 }
620
621 if (sbs->manager_present) {
622 for (id = 0; id < MAX_SBS_BAT; ++id) {
623 if (!(sbs->batteries_supported & (1 << id)))
624 continue;
625 bat = &sbs->battery[id];
626 saved_battery_state = bat->present;
627 acpi_battery_read(bat);
628 if (saved_battery_state == bat->present)
629 continue;
630 kobject_uevent(&bat->bat->dev.kobj, KOBJ_CHANGE);
631 }
632 }
633}
634
635static int disable_sbs_manager(const struct dmi_system_id *d)
636{
637 sbs_manager_broken = true;
638 return 0;
639}
640
641static struct dmi_system_id acpi_sbs_dmi_table[] = {
642 {
643 .callback = disable_sbs_manager,
644 .ident = "Apple",
645 .matches = {
646 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc.")
647 },
648 },
649 { },
650};
651
652static int acpi_sbs_add(struct acpi_device *device)
653{
654 struct acpi_sbs *sbs;
655 int result = 0;
656 int id;
657
658 dmi_check_system(acpi_sbs_dmi_table);
659
660 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
661 if (!sbs) {
662 result = -ENOMEM;
663 goto end;
664 }
665
666 mutex_init(&sbs->lock);
667
668 sbs->hc = acpi_driver_data(device->parent);
669 sbs->device = device;
670 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
671 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
672 device->driver_data = sbs;
673
674 result = acpi_charger_add(sbs);
675 if (result && result != -ENODEV)
676 goto end;
677
678 result = 0;
679
680 if (!sbs_manager_broken) {
681 result = acpi_manager_get_info(sbs);
682 if (!result) {
683 sbs->manager_present = 1;
684 for (id = 0; id < MAX_SBS_BAT; ++id)
685 if ((sbs->batteries_supported & (1 << id)))
686 acpi_battery_add(sbs, id);
687 }
688 }
689
690 if (!sbs->manager_present)
691 acpi_battery_add(sbs, 0);
692
693 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
694 end:
695 if (result)
696 acpi_sbs_remove(device);
697 return result;
698}
699
700static int acpi_sbs_remove(struct acpi_device *device)
701{
702 struct acpi_sbs *sbs;
703 int id;
704
705 if (!device)
706 return -EINVAL;
707 sbs = acpi_driver_data(device);
708 if (!sbs)
709 return -EINVAL;
710 mutex_lock(&sbs->lock);
711 acpi_smbus_unregister_callback(sbs->hc);
712 for (id = 0; id < MAX_SBS_BAT; ++id)
713 acpi_battery_remove(sbs, id);
714 acpi_charger_remove(sbs);
715 mutex_unlock(&sbs->lock);
716 mutex_destroy(&sbs->lock);
717 kfree(sbs);
718 return 0;
719}
720
721#ifdef CONFIG_PM_SLEEP
722static int acpi_sbs_resume(struct device *dev)
723{
724 struct acpi_sbs *sbs;
725 if (!dev)
726 return -EINVAL;
727 sbs = to_acpi_device(dev)->driver_data;
728 acpi_sbs_callback(sbs);
729 return 0;
730}
731#else
732#define acpi_sbs_resume NULL
733#endif
734
735static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume);
736
737static struct acpi_driver acpi_sbs_driver = {
738 .name = "sbs",
739 .class = ACPI_SBS_CLASS,
740 .ids = sbs_device_ids,
741 .ops = {
742 .add = acpi_sbs_add,
743 .remove = acpi_sbs_remove,
744 },
745 .drv.pm = &acpi_sbs_pm,
746};
747
748static int __init acpi_sbs_init(void)
749{
750 int result = 0;
751
752 if (acpi_disabled)
753 return -ENODEV;
754
755 result = acpi_bus_register_driver(&acpi_sbs_driver);
756 if (result < 0)
757 return -ENODEV;
758
759 return 0;
760}
761
762static void __exit acpi_sbs_exit(void)
763{
764 acpi_bus_unregister_driver(&acpi_sbs_driver);
765 return;
766}
767
768module_init(acpi_sbs_init);
769module_exit(acpi_sbs_exit);