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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/platform_data/x86/apple.h>
35#include <acpi/battery.h>
36
37#include "sbshc.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
61#define MAX_SBS_BAT 4
62#define ACPI_SBS_BLOCK_MAX 32
63
64static const struct acpi_device_id sbs_device_ids[] = {
65 {"ACPI0002", 0},
66 {"", 0},
67};
68MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
69
70struct acpi_battery {
71 struct power_supply *bat;
72 struct power_supply_desc bat_desc;
73 struct acpi_sbs *sbs;
74 unsigned long update_time;
75 char name[8];
76 char manufacturer_name[ACPI_SBS_BLOCK_MAX];
77 char device_name[ACPI_SBS_BLOCK_MAX];
78 char device_chemistry[ACPI_SBS_BLOCK_MAX];
79 u16 alarm_capacity;
80 u16 full_charge_capacity;
81 u16 design_capacity;
82 u16 design_voltage;
83 u16 serial_number;
84 u16 cycle_count;
85 u16 temp_now;
86 u16 voltage_now;
87 s16 rate_now;
88 s16 rate_avg;
89 u16 capacity_now;
90 u16 state_of_charge;
91 u16 state;
92 u16 mode;
93 u16 spec;
94 u8 id;
95 u8 present:1;
96 u8 have_sysfs_alarm:1;
97};
98
99#define to_acpi_battery(x) power_supply_get_drvdata(x)
100
101struct acpi_sbs {
102 struct power_supply *charger;
103 struct acpi_device *device;
104 struct acpi_smb_hc *hc;
105 struct mutex lock;
106 struct acpi_battery battery[MAX_SBS_BAT];
107 u8 batteries_supported:4;
108 u8 manager_present:1;
109 u8 charger_present:1;
110 u8 charger_exists:1;
111};
112
113#define to_acpi_sbs(x) power_supply_get_drvdata(x)
114
115static int acpi_sbs_remove(struct acpi_device *device);
116static int acpi_battery_get_state(struct acpi_battery *battery);
117
118static inline int battery_scale(int log)
119{
120 int scale = 1;
121 while (log--)
122 scale *= 10;
123 return scale;
124}
125
126static inline int acpi_battery_vscale(struct acpi_battery *battery)
127{
128 return battery_scale((battery->spec & 0x0f00) >> 8);
129}
130
131static inline int acpi_battery_ipscale(struct acpi_battery *battery)
132{
133 return battery_scale((battery->spec & 0xf000) >> 12);
134}
135
136static inline int acpi_battery_mode(struct acpi_battery *battery)
137{
138 return (battery->mode & 0x8000);
139}
140
141static inline int acpi_battery_scale(struct acpi_battery *battery)
142{
143 return (acpi_battery_mode(battery) ? 10 : 1) *
144 acpi_battery_ipscale(battery);
145}
146
147static int sbs_get_ac_property(struct power_supply *psy,
148 enum power_supply_property psp,
149 union power_supply_propval *val)
150{
151 struct acpi_sbs *sbs = to_acpi_sbs(psy);
152 switch (psp) {
153 case POWER_SUPPLY_PROP_ONLINE:
154 val->intval = sbs->charger_present;
155 break;
156 default:
157 return -EINVAL;
158 }
159 return 0;
160}
161
162static int acpi_battery_technology(struct acpi_battery *battery)
163{
164 if (!strcasecmp("NiCd", battery->device_chemistry))
165 return POWER_SUPPLY_TECHNOLOGY_NiCd;
166 if (!strcasecmp("NiMH", battery->device_chemistry))
167 return POWER_SUPPLY_TECHNOLOGY_NiMH;
168 if (!strcasecmp("LION", battery->device_chemistry))
169 return POWER_SUPPLY_TECHNOLOGY_LION;
170 if (!strcasecmp("LiP", battery->device_chemistry))
171 return POWER_SUPPLY_TECHNOLOGY_LIPO;
172 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
173}
174
175static int acpi_sbs_battery_get_property(struct power_supply *psy,
176 enum power_supply_property psp,
177 union power_supply_propval *val)
178{
179 struct acpi_battery *battery = to_acpi_battery(psy);
180
181 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
182 return -ENODEV;
183
184 acpi_battery_get_state(battery);
185 switch (psp) {
186 case POWER_SUPPLY_PROP_STATUS:
187 if (battery->rate_now < 0)
188 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
189 else if (battery->rate_now > 0)
190 val->intval = POWER_SUPPLY_STATUS_CHARGING;
191 else
192 val->intval = POWER_SUPPLY_STATUS_FULL;
193 break;
194 case POWER_SUPPLY_PROP_PRESENT:
195 val->intval = battery->present;
196 break;
197 case POWER_SUPPLY_PROP_TECHNOLOGY:
198 val->intval = acpi_battery_technology(battery);
199 break;
200 case POWER_SUPPLY_PROP_CYCLE_COUNT:
201 val->intval = battery->cycle_count;
202 break;
203 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
204 val->intval = battery->design_voltage *
205 acpi_battery_vscale(battery) * 1000;
206 break;
207 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
208 val->intval = battery->voltage_now *
209 acpi_battery_vscale(battery) * 1000;
210 break;
211 case POWER_SUPPLY_PROP_CURRENT_NOW:
212 case POWER_SUPPLY_PROP_POWER_NOW:
213 val->intval = abs(battery->rate_now) *
214 acpi_battery_ipscale(battery) * 1000;
215 val->intval *= (acpi_battery_mode(battery)) ?
216 (battery->voltage_now *
217 acpi_battery_vscale(battery) / 1000) : 1;
218 break;
219 case POWER_SUPPLY_PROP_CURRENT_AVG:
220 case POWER_SUPPLY_PROP_POWER_AVG:
221 val->intval = abs(battery->rate_avg) *
222 acpi_battery_ipscale(battery) * 1000;
223 val->intval *= (acpi_battery_mode(battery)) ?
224 (battery->voltage_now *
225 acpi_battery_vscale(battery) / 1000) : 1;
226 break;
227 case POWER_SUPPLY_PROP_CAPACITY:
228 val->intval = battery->state_of_charge;
229 break;
230 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
231 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
232 val->intval = battery->design_capacity *
233 acpi_battery_scale(battery) * 1000;
234 break;
235 case POWER_SUPPLY_PROP_CHARGE_FULL:
236 case POWER_SUPPLY_PROP_ENERGY_FULL:
237 val->intval = battery->full_charge_capacity *
238 acpi_battery_scale(battery) * 1000;
239 break;
240 case POWER_SUPPLY_PROP_CHARGE_NOW:
241 case POWER_SUPPLY_PROP_ENERGY_NOW:
242 val->intval = battery->capacity_now *
243 acpi_battery_scale(battery) * 1000;
244 break;
245 case POWER_SUPPLY_PROP_TEMP:
246 val->intval = battery->temp_now - 2730; // dK -> dC
247 break;
248 case POWER_SUPPLY_PROP_MODEL_NAME:
249 val->strval = battery->device_name;
250 break;
251 case POWER_SUPPLY_PROP_MANUFACTURER:
252 val->strval = battery->manufacturer_name;
253 break;
254 default:
255 return -EINVAL;
256 }
257 return 0;
258}
259
260static enum power_supply_property sbs_ac_props[] = {
261 POWER_SUPPLY_PROP_ONLINE,
262};
263
264static enum power_supply_property sbs_charge_battery_props[] = {
265 POWER_SUPPLY_PROP_STATUS,
266 POWER_SUPPLY_PROP_PRESENT,
267 POWER_SUPPLY_PROP_TECHNOLOGY,
268 POWER_SUPPLY_PROP_CYCLE_COUNT,
269 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
270 POWER_SUPPLY_PROP_VOLTAGE_NOW,
271 POWER_SUPPLY_PROP_CURRENT_NOW,
272 POWER_SUPPLY_PROP_CURRENT_AVG,
273 POWER_SUPPLY_PROP_CAPACITY,
274 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
275 POWER_SUPPLY_PROP_CHARGE_FULL,
276 POWER_SUPPLY_PROP_CHARGE_NOW,
277 POWER_SUPPLY_PROP_TEMP,
278 POWER_SUPPLY_PROP_MODEL_NAME,
279 POWER_SUPPLY_PROP_MANUFACTURER,
280};
281
282static enum power_supply_property sbs_energy_battery_props[] = {
283 POWER_SUPPLY_PROP_STATUS,
284 POWER_SUPPLY_PROP_PRESENT,
285 POWER_SUPPLY_PROP_TECHNOLOGY,
286 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
287 POWER_SUPPLY_PROP_VOLTAGE_NOW,
288 POWER_SUPPLY_PROP_CURRENT_NOW,
289 POWER_SUPPLY_PROP_CURRENT_AVG,
290 POWER_SUPPLY_PROP_POWER_NOW,
291 POWER_SUPPLY_PROP_POWER_AVG,
292 POWER_SUPPLY_PROP_CAPACITY,
293 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
294 POWER_SUPPLY_PROP_ENERGY_FULL,
295 POWER_SUPPLY_PROP_ENERGY_NOW,
296 POWER_SUPPLY_PROP_TEMP,
297 POWER_SUPPLY_PROP_MODEL_NAME,
298 POWER_SUPPLY_PROP_MANUFACTURER,
299};
300
301static const struct power_supply_desc acpi_sbs_charger_desc = {
302 .name = "sbs-charger",
303 .type = POWER_SUPPLY_TYPE_MAINS,
304 .properties = sbs_ac_props,
305 .num_properties = ARRAY_SIZE(sbs_ac_props),
306 .get_property = sbs_get_ac_property,
307};
308
309/* --------------------------------------------------------------------------
310 Smart Battery System Management
311 -------------------------------------------------------------------------- */
312
313struct 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
319static 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
333static 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
343static 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
355static 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
372static 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
395static 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
402static 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
431static 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
439 if (result)
440 return result;
441
442 /*
443 * The spec requires that bit 4 always be 1. If it's not set, assume
444 * that the implementation doesn't support an SBS charger
445 */
446 if (!((status >> 4) & 0x1))
447 return -ENODEV;
448
449 sbs->charger_present = (status >> 15) & 0x1;
450 return 0;
451}
452
453static ssize_t acpi_battery_alarm_show(struct device *dev,
454 struct device_attribute *attr,
455 char *buf)
456{
457 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
458 acpi_battery_get_alarm(battery);
459 return sprintf(buf, "%d\n", battery->alarm_capacity *
460 acpi_battery_scale(battery) * 1000);
461}
462
463static ssize_t acpi_battery_alarm_store(struct device *dev,
464 struct device_attribute *attr,
465 const char *buf, size_t count)
466{
467 unsigned long x;
468 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
469 if (sscanf(buf, "%lu\n", &x) == 1)
470 battery->alarm_capacity = x /
471 (1000 * acpi_battery_scale(battery));
472 if (battery->present)
473 acpi_battery_set_alarm(battery);
474 return count;
475}
476
477static const struct device_attribute alarm_attr = {
478 .attr = {.name = "alarm", .mode = 0644},
479 .show = acpi_battery_alarm_show,
480 .store = acpi_battery_alarm_store,
481};
482
483/* --------------------------------------------------------------------------
484 Driver Interface
485 -------------------------------------------------------------------------- */
486static int acpi_battery_read(struct acpi_battery *battery)
487{
488 int result = 0, saved_present = battery->present;
489 u16 state;
490
491 if (battery->sbs->manager_present) {
492 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
493 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
494 if (!result)
495 battery->present = state & (1 << battery->id);
496 state &= 0x0fff;
497 state |= 1 << (battery->id + 12);
498 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
499 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
500 } else if (battery->id == 0)
501 battery->present = 1;
502
503 if (result || !battery->present)
504 return result;
505
506 if (saved_present != battery->present) {
507 battery->update_time = 0;
508 result = acpi_battery_get_info(battery);
509 if (result) {
510 battery->present = 0;
511 return result;
512 }
513 }
514 result = acpi_battery_get_state(battery);
515 if (result)
516 battery->present = 0;
517 return result;
518}
519
520/* Smart Battery */
521static int acpi_battery_add(struct acpi_sbs *sbs, int id)
522{
523 struct acpi_battery *battery = &sbs->battery[id];
524 struct power_supply_config psy_cfg = { .drv_data = battery, };
525 int result;
526
527 battery->id = id;
528 battery->sbs = sbs;
529 result = acpi_battery_read(battery);
530 if (result)
531 return result;
532
533 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
534 battery->bat_desc.name = battery->name;
535 battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
536 if (!acpi_battery_mode(battery)) {
537 battery->bat_desc.properties = sbs_charge_battery_props;
538 battery->bat_desc.num_properties =
539 ARRAY_SIZE(sbs_charge_battery_props);
540 } else {
541 battery->bat_desc.properties = sbs_energy_battery_props;
542 battery->bat_desc.num_properties =
543 ARRAY_SIZE(sbs_energy_battery_props);
544 }
545 battery->bat_desc.get_property = acpi_sbs_battery_get_property;
546 battery->bat = power_supply_register(&sbs->device->dev,
547 &battery->bat_desc, &psy_cfg);
548 if (IS_ERR(battery->bat)) {
549 result = PTR_ERR(battery->bat);
550 battery->bat = NULL;
551 goto end;
552 }
553
554 result = device_create_file(&battery->bat->dev, &alarm_attr);
555 if (result)
556 goto end;
557 battery->have_sysfs_alarm = 1;
558 end:
559 printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
560 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
561 battery->name, battery->present ? "present" : "absent");
562 return result;
563}
564
565static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
566{
567 struct acpi_battery *battery = &sbs->battery[id];
568
569 if (battery->bat) {
570 if (battery->have_sysfs_alarm)
571 device_remove_file(&battery->bat->dev, &alarm_attr);
572 power_supply_unregister(battery->bat);
573 }
574}
575
576static int acpi_charger_add(struct acpi_sbs *sbs)
577{
578 int result;
579 struct power_supply_config psy_cfg = { .drv_data = sbs, };
580
581 result = acpi_ac_get_present(sbs);
582 if (result)
583 goto end;
584
585 sbs->charger_exists = 1;
586 sbs->charger = power_supply_register(&sbs->device->dev,
587 &acpi_sbs_charger_desc, &psy_cfg);
588 if (IS_ERR(sbs->charger)) {
589 result = PTR_ERR(sbs->charger);
590 sbs->charger = NULL;
591 }
592 printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
593 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
594 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
595 end:
596 return result;
597}
598
599static void acpi_charger_remove(struct acpi_sbs *sbs)
600{
601 if (sbs->charger)
602 power_supply_unregister(sbs->charger);
603}
604
605static void acpi_sbs_callback(void *context)
606{
607 int id;
608 struct acpi_sbs *sbs = context;
609 struct acpi_battery *bat;
610 u8 saved_charger_state = sbs->charger_present;
611 u8 saved_battery_state;
612
613 if (sbs->charger_exists) {
614 acpi_ac_get_present(sbs);
615 if (sbs->charger_present != saved_charger_state)
616 kobject_uevent(&sbs->charger->dev.kobj, KOBJ_CHANGE);
617 }
618
619 if (sbs->manager_present) {
620 for (id = 0; id < MAX_SBS_BAT; ++id) {
621 if (!(sbs->batteries_supported & (1 << id)))
622 continue;
623 bat = &sbs->battery[id];
624 saved_battery_state = bat->present;
625 acpi_battery_read(bat);
626 if (saved_battery_state == bat->present)
627 continue;
628 kobject_uevent(&bat->bat->dev.kobj, KOBJ_CHANGE);
629 }
630 }
631}
632
633static int acpi_sbs_add(struct acpi_device *device)
634{
635 struct acpi_sbs *sbs;
636 int result = 0;
637 int id;
638
639 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
640 if (!sbs) {
641 result = -ENOMEM;
642 goto end;
643 }
644
645 mutex_init(&sbs->lock);
646
647 sbs->hc = acpi_driver_data(device->parent);
648 sbs->device = device;
649 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
650 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
651 device->driver_data = sbs;
652
653 result = acpi_charger_add(sbs);
654 if (result && result != -ENODEV)
655 goto end;
656
657 result = 0;
658
659 if (!x86_apple_machine) {
660 result = acpi_manager_get_info(sbs);
661 if (!result) {
662 sbs->manager_present = 1;
663 for (id = 0; id < MAX_SBS_BAT; ++id)
664 if ((sbs->batteries_supported & (1 << id)))
665 acpi_battery_add(sbs, id);
666 }
667 }
668
669 if (!sbs->manager_present)
670 acpi_battery_add(sbs, 0);
671
672 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
673 end:
674 if (result)
675 acpi_sbs_remove(device);
676 return result;
677}
678
679static int acpi_sbs_remove(struct acpi_device *device)
680{
681 struct acpi_sbs *sbs;
682 int id;
683
684 if (!device)
685 return -EINVAL;
686 sbs = acpi_driver_data(device);
687 if (!sbs)
688 return -EINVAL;
689 mutex_lock(&sbs->lock);
690 acpi_smbus_unregister_callback(sbs->hc);
691 for (id = 0; id < MAX_SBS_BAT; ++id)
692 acpi_battery_remove(sbs, id);
693 acpi_charger_remove(sbs);
694 mutex_unlock(&sbs->lock);
695 mutex_destroy(&sbs->lock);
696 kfree(sbs);
697 return 0;
698}
699
700#ifdef CONFIG_PM_SLEEP
701static int acpi_sbs_resume(struct device *dev)
702{
703 struct acpi_sbs *sbs;
704 if (!dev)
705 return -EINVAL;
706 sbs = to_acpi_device(dev)->driver_data;
707 acpi_sbs_callback(sbs);
708 return 0;
709}
710#else
711#define acpi_sbs_resume NULL
712#endif
713
714static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume);
715
716static struct acpi_driver acpi_sbs_driver = {
717 .name = "sbs",
718 .class = ACPI_SBS_CLASS,
719 .ids = sbs_device_ids,
720 .ops = {
721 .add = acpi_sbs_add,
722 .remove = acpi_sbs_remove,
723 },
724 .drv.pm = &acpi_sbs_pm,
725};
726
727static int __init acpi_sbs_init(void)
728{
729 int result = 0;
730
731 if (acpi_disabled)
732 return -ENODEV;
733
734 result = acpi_bus_register_driver(&acpi_sbs_driver);
735 if (result < 0)
736 return -ENODEV;
737
738 return 0;
739}
740
741static void __exit acpi_sbs_exit(void)
742{
743 acpi_bus_unregister_driver(&acpi_sbs_driver);
744 return;
745}
746
747module_init(acpi_sbs_init);
748module_exit(acpi_sbs_exit);