2 * sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $)
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>
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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.
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
27 #include <linux/init.h>
28 #include <linux/module.h>
29 #include <linux/moduleparam.h>
30 #include <linux/kernel.h>
32 #ifdef CONFIG_ACPI_PROCFS_POWER
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <asm/uaccess.h>
38 #include <linux/acpi.h>
39 #include <linux/timer.h>
40 #include <linux/jiffies.h>
41 #include <linux/delay.h>
43 #ifdef CONFIG_ACPI_SYSFS_POWER
44 #include <linux/power_supply.h>
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"
59 #define ACPI_SBS_NOTIFY_STATUS 0x80
60 #define ACPI_SBS_NOTIFY_INFO 0x81
62 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
63 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
64 MODULE_LICENSE("GPL");
66 static unsigned int cache_time
= 1000;
67 module_param(cache_time
, uint
, 0644);
68 MODULE_PARM_DESC(cache_time
, "cache time in milliseconds");
70 extern struct proc_dir_entry
*acpi_lock_ac_dir(void);
71 extern struct proc_dir_entry
*acpi_lock_battery_dir(void);
72 extern void acpi_unlock_ac_dir(struct proc_dir_entry
*acpi_ac_dir
);
73 extern void acpi_unlock_battery_dir(struct proc_dir_entry
*acpi_battery_dir
);
76 #define ACPI_SBS_BLOCK_MAX 32
78 static const struct acpi_device_id sbs_device_ids
[] = {
82 MODULE_DEVICE_TABLE(acpi
, sbs_device_ids
);
85 #ifdef CONFIG_ACPI_SYSFS_POWER
86 struct power_supply bat
;
89 #ifdef CONFIG_ACPI_PROCFS_POWER
90 struct proc_dir_entry
*proc_entry
;
92 unsigned long update_time
;
94 char manufacturer_name
[ACPI_SBS_BLOCK_MAX
];
95 char device_name
[ACPI_SBS_BLOCK_MAX
];
96 char device_chemistry
[ACPI_SBS_BLOCK_MAX
];
98 u16 full_charge_capacity
;
114 u8 have_sysfs_alarm
:1;
117 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
120 #ifdef CONFIG_ACPI_SYSFS_POWER
121 struct power_supply charger
;
123 struct acpi_device
*device
;
124 struct acpi_smb_hc
*hc
;
126 #ifdef CONFIG_ACPI_PROCFS_POWER
127 struct proc_dir_entry
*charger_entry
;
129 struct acpi_battery battery
[MAX_SBS_BAT
];
130 u8 batteries_supported
:4;
131 u8 manager_present
:1;
132 u8 charger_present
:1;
135 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
137 static inline int battery_scale(int log
)
145 static inline int acpi_battery_vscale(struct acpi_battery
*battery
)
147 return battery_scale((battery
->spec
& 0x0f00) >> 8);
150 static inline int acpi_battery_ipscale(struct acpi_battery
*battery
)
152 return battery_scale((battery
->spec
& 0xf000) >> 12);
155 static inline int acpi_battery_mode(struct acpi_battery
*battery
)
157 return (battery
->mode
& 0x8000);
160 static inline int acpi_battery_scale(struct acpi_battery
*battery
)
162 return (acpi_battery_mode(battery
) ? 10 : 1) *
163 acpi_battery_ipscale(battery
);
166 #ifdef CONFIG_ACPI_SYSFS_POWER
167 static int sbs_get_ac_property(struct power_supply
*psy
,
168 enum power_supply_property psp
,
169 union power_supply_propval
*val
)
171 struct acpi_sbs
*sbs
= to_acpi_sbs(psy
);
173 case POWER_SUPPLY_PROP_ONLINE
:
174 val
->intval
= sbs
->charger_present
;
182 static int acpi_battery_technology(struct acpi_battery
*battery
)
184 if (!strcasecmp("NiCd", battery
->device_chemistry
))
185 return POWER_SUPPLY_TECHNOLOGY_NiCd
;
186 if (!strcasecmp("NiMH", battery
->device_chemistry
))
187 return POWER_SUPPLY_TECHNOLOGY_NiMH
;
188 if (!strcasecmp("LION", battery
->device_chemistry
))
189 return POWER_SUPPLY_TECHNOLOGY_LION
;
190 if (!strcasecmp("LiP", battery
->device_chemistry
))
191 return POWER_SUPPLY_TECHNOLOGY_LIPO
;
192 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN
;
195 static int acpi_sbs_battery_get_property(struct power_supply
*psy
,
196 enum power_supply_property psp
,
197 union power_supply_propval
*val
)
199 struct acpi_battery
*battery
= to_acpi_battery(psy
);
201 if ((!battery
->present
) && psp
!= POWER_SUPPLY_PROP_PRESENT
)
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
;
210 val
->intval
= POWER_SUPPLY_STATUS_FULL
;
212 case POWER_SUPPLY_PROP_PRESENT
:
213 val
->intval
= battery
->present
;
215 case POWER_SUPPLY_PROP_TECHNOLOGY
:
216 val
->intval
= acpi_battery_technology(battery
);
218 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
:
219 val
->intval
= battery
->design_voltage
*
220 acpi_battery_vscale(battery
) * 1000;
222 case POWER_SUPPLY_PROP_VOLTAGE_NOW
:
223 val
->intval
= battery
->voltage_now
*
224 acpi_battery_vscale(battery
) * 1000;
226 case POWER_SUPPLY_PROP_CURRENT_NOW
:
227 case POWER_SUPPLY_PROP_POWER_NOW
:
228 val
->intval
= abs(battery
->rate_now
) *
229 acpi_battery_ipscale(battery
) * 1000;
231 case POWER_SUPPLY_PROP_CURRENT_AVG
:
232 case POWER_SUPPLY_PROP_POWER_AVG
:
233 val
->intval
= abs(battery
->rate_avg
) *
234 acpi_battery_ipscale(battery
) * 1000;
236 case POWER_SUPPLY_PROP_CAPACITY
:
237 val
->intval
= battery
->state_of_charge
;
239 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
:
240 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
:
241 val
->intval
= battery
->design_capacity
*
242 acpi_battery_scale(battery
) * 1000;
244 case POWER_SUPPLY_PROP_CHARGE_FULL
:
245 case POWER_SUPPLY_PROP_ENERGY_FULL
:
246 val
->intval
= battery
->full_charge_capacity
*
247 acpi_battery_scale(battery
) * 1000;
249 case POWER_SUPPLY_PROP_CHARGE_NOW
:
250 case POWER_SUPPLY_PROP_ENERGY_NOW
:
251 val
->intval
= battery
->capacity_now
*
252 acpi_battery_scale(battery
) * 1000;
254 case POWER_SUPPLY_PROP_TEMP
:
255 val
->intval
= battery
->temp_now
- 2730; // dK -> dC
257 case POWER_SUPPLY_PROP_MODEL_NAME
:
258 val
->strval
= battery
->device_name
;
260 case POWER_SUPPLY_PROP_MANUFACTURER
:
261 val
->strval
= battery
->manufacturer_name
;
269 static enum power_supply_property sbs_ac_props
[] = {
270 POWER_SUPPLY_PROP_ONLINE
,
273 static enum power_supply_property sbs_charge_battery_props
[] = {
274 POWER_SUPPLY_PROP_STATUS
,
275 POWER_SUPPLY_PROP_PRESENT
,
276 POWER_SUPPLY_PROP_TECHNOLOGY
,
277 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
278 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
279 POWER_SUPPLY_PROP_CURRENT_NOW
,
280 POWER_SUPPLY_PROP_CURRENT_AVG
,
281 POWER_SUPPLY_PROP_CAPACITY
,
282 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
,
283 POWER_SUPPLY_PROP_CHARGE_FULL
,
284 POWER_SUPPLY_PROP_CHARGE_NOW
,
285 POWER_SUPPLY_PROP_TEMP
,
286 POWER_SUPPLY_PROP_MODEL_NAME
,
287 POWER_SUPPLY_PROP_MANUFACTURER
,
290 static enum power_supply_property sbs_energy_battery_props
[] = {
291 POWER_SUPPLY_PROP_STATUS
,
292 POWER_SUPPLY_PROP_PRESENT
,
293 POWER_SUPPLY_PROP_TECHNOLOGY
,
294 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
295 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
296 POWER_SUPPLY_PROP_CURRENT_NOW
,
297 POWER_SUPPLY_PROP_CURRENT_AVG
,
298 POWER_SUPPLY_PROP_POWER_NOW
,
299 POWER_SUPPLY_PROP_POWER_AVG
,
300 POWER_SUPPLY_PROP_CAPACITY
,
301 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
,
302 POWER_SUPPLY_PROP_ENERGY_FULL
,
303 POWER_SUPPLY_PROP_ENERGY_NOW
,
304 POWER_SUPPLY_PROP_TEMP
,
305 POWER_SUPPLY_PROP_MODEL_NAME
,
306 POWER_SUPPLY_PROP_MANUFACTURER
,
311 /* --------------------------------------------------------------------------
312 Smart Battery System Management
313 -------------------------------------------------------------------------- */
315 struct 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 */
321 static 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
)},
335 static 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
)},
345 static int acpi_manager_get_info(struct acpi_sbs
*sbs
)
348 u16 battery_system_info
;
350 result
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_MANAGER
,
351 0x04, (u8
*)&battery_system_info
);
353 sbs
->batteries_supported
= battery_system_info
& 0x000f;
357 static int acpi_battery_get_info(struct acpi_battery
*battery
)
361 for (i
= 0; i
< ARRAY_SIZE(info_readers
); ++i
) {
362 result
= acpi_smbus_read(battery
->sbs
->hc
,
363 info_readers
[i
].mode
,
365 info_readers
[i
].command
,
367 info_readers
[i
].offset
);
374 static int acpi_battery_get_state(struct acpi_battery
*battery
)
378 if (battery
->update_time
&&
379 time_before(jiffies
, battery
->update_time
+
380 msecs_to_jiffies(cache_time
)))
382 for (i
= 0; i
< ARRAY_SIZE(state_readers
); ++i
) {
383 result
= acpi_smbus_read(battery
->sbs
->hc
,
384 state_readers
[i
].mode
,
386 state_readers
[i
].command
,
388 state_readers
[i
].offset
);
393 battery
->update_time
= jiffies
;
397 static int acpi_battery_get_alarm(struct acpi_battery
*battery
)
399 return acpi_smbus_read(battery
->sbs
->hc
, SMBUS_READ_WORD
,
400 ACPI_SBS_BATTERY
, 0x01,
401 (u8
*)&battery
->alarm_capacity
);
404 static int acpi_battery_set_alarm(struct acpi_battery
*battery
)
406 struct acpi_sbs
*sbs
= battery
->sbs
;
407 u16 value
, sel
= 1 << (battery
->id
+ 12);
412 if (sbs
->manager_present
) {
413 ret
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_MANAGER
,
417 if ((value
& 0xf000) != sel
) {
420 ret
= acpi_smbus_write(sbs
->hc
, SMBUS_WRITE_WORD
,
422 0x01, (u8
*)&value
, 2);
427 ret
= acpi_smbus_write(sbs
->hc
, SMBUS_WRITE_WORD
, ACPI_SBS_BATTERY
,
428 0x01, (u8
*)&battery
->alarm_capacity
, 2);
433 static int acpi_ac_get_present(struct acpi_sbs
*sbs
)
438 result
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_CHARGER
,
439 0x13, (u8
*) & status
);
441 sbs
->charger_present
= (status
>> 15) & 0x1;
445 #ifdef CONFIG_ACPI_SYSFS_POWER
446 static ssize_t
acpi_battery_alarm_show(struct device
*dev
,
447 struct device_attribute
*attr
,
450 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
451 acpi_battery_get_alarm(battery
);
452 return sprintf(buf
, "%d\n", battery
->alarm_capacity
*
453 acpi_battery_scale(battery
) * 1000);
456 static ssize_t
acpi_battery_alarm_store(struct device
*dev
,
457 struct device_attribute
*attr
,
458 const char *buf
, size_t count
)
461 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
462 if (sscanf(buf
, "%ld\n", &x
) == 1)
463 battery
->alarm_capacity
= x
/
464 (1000 * acpi_battery_scale(battery
));
465 if (battery
->present
)
466 acpi_battery_set_alarm(battery
);
470 static struct device_attribute alarm_attr
= {
471 .attr
= {.name
= "alarm", .mode
= 0644},
472 .show
= acpi_battery_alarm_show
,
473 .store
= acpi_battery_alarm_store
,
477 /* --------------------------------------------------------------------------
478 FS Interface (/proc/acpi)
479 -------------------------------------------------------------------------- */
481 #ifdef CONFIG_ACPI_PROCFS_POWER
482 /* Generic Routines */
484 acpi_sbs_add_fs(struct proc_dir_entry
**dir
,
485 struct proc_dir_entry
*parent_dir
,
487 const struct file_operations
*info_fops
,
488 const struct file_operations
*state_fops
,
489 const struct file_operations
*alarm_fops
, void *data
)
492 *dir
= proc_mkdir(dir_name
, parent_dir
);
496 (*dir
)->owner
= THIS_MODULE
;
501 proc_create_data(ACPI_SBS_FILE_INFO
, S_IRUGO
, *dir
,
506 proc_create_data(ACPI_SBS_FILE_STATE
, S_IRUGO
, *dir
,
511 proc_create_data(ACPI_SBS_FILE_ALARM
, S_IRUGO
, *dir
,
517 acpi_sbs_remove_fs(struct proc_dir_entry
**dir
,
518 struct proc_dir_entry
*parent_dir
)
521 remove_proc_entry(ACPI_SBS_FILE_INFO
, *dir
);
522 remove_proc_entry(ACPI_SBS_FILE_STATE
, *dir
);
523 remove_proc_entry(ACPI_SBS_FILE_ALARM
, *dir
);
524 remove_proc_entry((*dir
)->name
, parent_dir
);
529 /* Smart Battery Interface */
530 static struct proc_dir_entry
*acpi_battery_dir
= NULL
;
532 static inline char *acpi_battery_units(struct acpi_battery
*battery
)
534 return acpi_battery_mode(battery
) ? " mW" : " mA";
538 static int acpi_battery_read_info(struct seq_file
*seq
, void *offset
)
540 struct acpi_battery
*battery
= seq
->private;
541 struct acpi_sbs
*sbs
= battery
->sbs
;
544 mutex_lock(&sbs
->lock
);
546 seq_printf(seq
, "present: %s\n",
547 (battery
->present
) ? "yes" : "no");
548 if (!battery
->present
)
551 seq_printf(seq
, "design capacity: %i%sh\n",
552 battery
->design_capacity
* acpi_battery_scale(battery
),
553 acpi_battery_units(battery
));
554 seq_printf(seq
, "last full capacity: %i%sh\n",
555 battery
->full_charge_capacity
* acpi_battery_scale(battery
),
556 acpi_battery_units(battery
));
557 seq_printf(seq
, "battery technology: rechargeable\n");
558 seq_printf(seq
, "design voltage: %i mV\n",
559 battery
->design_voltage
* acpi_battery_vscale(battery
));
560 seq_printf(seq
, "design capacity warning: unknown\n");
561 seq_printf(seq
, "design capacity low: unknown\n");
562 seq_printf(seq
, "capacity granularity 1: unknown\n");
563 seq_printf(seq
, "capacity granularity 2: unknown\n");
564 seq_printf(seq
, "model number: %s\n", battery
->device_name
);
565 seq_printf(seq
, "serial number: %i\n",
566 battery
->serial_number
);
567 seq_printf(seq
, "battery type: %s\n",
568 battery
->device_chemistry
);
569 seq_printf(seq
, "OEM info: %s\n",
570 battery
->manufacturer_name
);
572 mutex_unlock(&sbs
->lock
);
576 static int acpi_battery_info_open_fs(struct inode
*inode
, struct file
*file
)
578 return single_open(file
, acpi_battery_read_info
, PDE(inode
)->data
);
581 static int acpi_battery_read_state(struct seq_file
*seq
, void *offset
)
583 struct acpi_battery
*battery
= seq
->private;
584 struct acpi_sbs
*sbs
= battery
->sbs
;
587 mutex_lock(&sbs
->lock
);
588 seq_printf(seq
, "present: %s\n",
589 (battery
->present
) ? "yes" : "no");
590 if (!battery
->present
)
593 acpi_battery_get_state(battery
);
594 seq_printf(seq
, "capacity state: %s\n",
595 (battery
->state
& 0x0010) ? "critical" : "ok");
596 seq_printf(seq
, "charging state: %s\n",
597 (battery
->rate_now
< 0) ? "discharging" :
598 ((battery
->rate_now
> 0) ? "charging" : "charged"));
599 rate
= abs(battery
->rate_now
) * acpi_battery_ipscale(battery
);
600 rate
*= (acpi_battery_mode(battery
))?(battery
->voltage_now
*
601 acpi_battery_vscale(battery
)/1000):1;
602 seq_printf(seq
, "present rate: %d%s\n", rate
,
603 acpi_battery_units(battery
));
604 seq_printf(seq
, "remaining capacity: %i%sh\n",
605 battery
->capacity_now
* acpi_battery_scale(battery
),
606 acpi_battery_units(battery
));
607 seq_printf(seq
, "present voltage: %i mV\n",
608 battery
->voltage_now
* acpi_battery_vscale(battery
));
611 mutex_unlock(&sbs
->lock
);
615 static int acpi_battery_state_open_fs(struct inode
*inode
, struct file
*file
)
617 return single_open(file
, acpi_battery_read_state
, PDE(inode
)->data
);
620 static int acpi_battery_read_alarm(struct seq_file
*seq
, void *offset
)
622 struct acpi_battery
*battery
= seq
->private;
623 struct acpi_sbs
*sbs
= battery
->sbs
;
626 mutex_lock(&sbs
->lock
);
628 if (!battery
->present
) {
629 seq_printf(seq
, "present: no\n");
633 acpi_battery_get_alarm(battery
);
634 seq_printf(seq
, "alarm: ");
635 if (battery
->alarm_capacity
)
636 seq_printf(seq
, "%i%sh\n",
637 battery
->alarm_capacity
*
638 acpi_battery_scale(battery
),
639 acpi_battery_units(battery
));
641 seq_printf(seq
, "disabled\n");
643 mutex_unlock(&sbs
->lock
);
648 acpi_battery_write_alarm(struct file
*file
, const char __user
* buffer
,
649 size_t count
, loff_t
* ppos
)
651 struct seq_file
*seq
= file
->private_data
;
652 struct acpi_battery
*battery
= seq
->private;
653 struct acpi_sbs
*sbs
= battery
->sbs
;
654 char alarm_string
[12] = { '\0' };
656 mutex_lock(&sbs
->lock
);
657 if (!battery
->present
) {
661 if (count
> sizeof(alarm_string
) - 1) {
665 if (copy_from_user(alarm_string
, buffer
, count
)) {
669 alarm_string
[count
] = 0;
670 battery
->alarm_capacity
= simple_strtoul(alarm_string
, NULL
, 0) /
671 acpi_battery_scale(battery
);
672 acpi_battery_set_alarm(battery
);
674 mutex_unlock(&sbs
->lock
);
680 static int acpi_battery_alarm_open_fs(struct inode
*inode
, struct file
*file
)
682 return single_open(file
, acpi_battery_read_alarm
, PDE(inode
)->data
);
685 static const struct file_operations acpi_battery_info_fops
= {
686 .open
= acpi_battery_info_open_fs
,
689 .release
= single_release
,
690 .owner
= THIS_MODULE
,
693 static const struct file_operations acpi_battery_state_fops
= {
694 .open
= acpi_battery_state_open_fs
,
697 .release
= single_release
,
698 .owner
= THIS_MODULE
,
701 static const struct file_operations acpi_battery_alarm_fops
= {
702 .open
= acpi_battery_alarm_open_fs
,
704 .write
= acpi_battery_write_alarm
,
706 .release
= single_release
,
707 .owner
= THIS_MODULE
,
710 /* Legacy AC Adapter Interface */
712 static struct proc_dir_entry
*acpi_ac_dir
= NULL
;
714 static int acpi_ac_read_state(struct seq_file
*seq
, void *offset
)
717 struct acpi_sbs
*sbs
= seq
->private;
719 mutex_lock(&sbs
->lock
);
721 seq_printf(seq
, "state: %s\n",
722 sbs
->charger_present
? "on-line" : "off-line");
724 mutex_unlock(&sbs
->lock
);
728 static int acpi_ac_state_open_fs(struct inode
*inode
, struct file
*file
)
730 return single_open(file
, acpi_ac_read_state
, PDE(inode
)->data
);
733 static const struct file_operations acpi_ac_state_fops
= {
734 .open
= acpi_ac_state_open_fs
,
737 .release
= single_release
,
738 .owner
= THIS_MODULE
,
743 /* --------------------------------------------------------------------------
745 -------------------------------------------------------------------------- */
746 static int acpi_battery_read(struct acpi_battery
*battery
)
748 int result
= 0, saved_present
= battery
->present
;
751 if (battery
->sbs
->manager_present
) {
752 result
= acpi_smbus_read(battery
->sbs
->hc
, SMBUS_READ_WORD
,
753 ACPI_SBS_MANAGER
, 0x01, (u8
*)&state
);
755 battery
->present
= state
& (1 << battery
->id
);
757 state
|= 1 << (battery
->id
+ 12);
758 acpi_smbus_write(battery
->sbs
->hc
, SMBUS_WRITE_WORD
,
759 ACPI_SBS_MANAGER
, 0x01, (u8
*)&state
, 2);
760 } else if (battery
->id
== 0)
761 battery
->present
= 1;
762 if (result
|| !battery
->present
)
765 if (saved_present
!= battery
->present
) {
766 battery
->update_time
= 0;
767 result
= acpi_battery_get_info(battery
);
771 result
= acpi_battery_get_state(battery
);
776 static int acpi_battery_add(struct acpi_sbs
*sbs
, int id
)
778 struct acpi_battery
*battery
= &sbs
->battery
[id
];
783 result
= acpi_battery_read(battery
);
787 sprintf(battery
->name
, ACPI_BATTERY_DIR_NAME
, id
);
788 #ifdef CONFIG_ACPI_PROCFS_POWER
789 acpi_sbs_add_fs(&battery
->proc_entry
, acpi_battery_dir
,
790 battery
->name
, &acpi_battery_info_fops
,
791 &acpi_battery_state_fops
, &acpi_battery_alarm_fops
,
794 #ifdef CONFIG_ACPI_SYSFS_POWER
795 battery
->bat
.name
= battery
->name
;
796 battery
->bat
.type
= POWER_SUPPLY_TYPE_BATTERY
;
797 if (!acpi_battery_mode(battery
)) {
798 battery
->bat
.properties
= sbs_charge_battery_props
;
799 battery
->bat
.num_properties
=
800 ARRAY_SIZE(sbs_charge_battery_props
);
802 battery
->bat
.properties
= sbs_energy_battery_props
;
803 battery
->bat
.num_properties
=
804 ARRAY_SIZE(sbs_energy_battery_props
);
806 battery
->bat
.get_property
= acpi_sbs_battery_get_property
;
807 result
= power_supply_register(&sbs
->device
->dev
, &battery
->bat
);
810 result
= device_create_file(battery
->bat
.dev
, &alarm_attr
);
813 battery
->have_sysfs_alarm
= 1;
816 printk(KERN_INFO PREFIX
"%s [%s]: Battery Slot [%s] (battery %s)\n",
817 ACPI_SBS_DEVICE_NAME
, acpi_device_bid(sbs
->device
),
818 battery
->name
, battery
->present
? "present" : "absent");
822 static void acpi_battery_remove(struct acpi_sbs
*sbs
, int id
)
824 struct acpi_battery
*battery
= &sbs
->battery
[id
];
825 #ifdef CONFIG_ACPI_SYSFS_POWER
826 if (battery
->bat
.dev
) {
827 if (battery
->have_sysfs_alarm
)
828 device_remove_file(battery
->bat
.dev
, &alarm_attr
);
829 power_supply_unregister(&battery
->bat
);
832 #ifdef CONFIG_ACPI_PROCFS_POWER
833 if (battery
->proc_entry
)
834 acpi_sbs_remove_fs(&battery
->proc_entry
, acpi_battery_dir
);
838 static int acpi_charger_add(struct acpi_sbs
*sbs
)
842 result
= acpi_ac_get_present(sbs
);
845 #ifdef CONFIG_ACPI_PROCFS_POWER
846 result
= acpi_sbs_add_fs(&sbs
->charger_entry
, acpi_ac_dir
,
847 ACPI_AC_DIR_NAME
, NULL
,
848 &acpi_ac_state_fops
, NULL
, sbs
);
852 #ifdef CONFIG_ACPI_SYSFS_POWER
853 sbs
->charger
.name
= "sbs-charger";
854 sbs
->charger
.type
= POWER_SUPPLY_TYPE_MAINS
;
855 sbs
->charger
.properties
= sbs_ac_props
;
856 sbs
->charger
.num_properties
= ARRAY_SIZE(sbs_ac_props
);
857 sbs
->charger
.get_property
= sbs_get_ac_property
;
858 power_supply_register(&sbs
->device
->dev
, &sbs
->charger
);
860 printk(KERN_INFO PREFIX
"%s [%s]: AC Adapter [%s] (%s)\n",
861 ACPI_SBS_DEVICE_NAME
, acpi_device_bid(sbs
->device
),
862 ACPI_AC_DIR_NAME
, sbs
->charger_present
? "on-line" : "off-line");
867 static void acpi_charger_remove(struct acpi_sbs
*sbs
)
869 #ifdef CONFIG_ACPI_SYSFS_POWER
870 if (sbs
->charger
.dev
)
871 power_supply_unregister(&sbs
->charger
);
873 #ifdef CONFIG_ACPI_PROCFS_POWER
874 if (sbs
->charger_entry
)
875 acpi_sbs_remove_fs(&sbs
->charger_entry
, acpi_ac_dir
);
879 static void acpi_sbs_callback(void *context
)
882 struct acpi_sbs
*sbs
= context
;
883 struct acpi_battery
*bat
;
884 u8 saved_charger_state
= sbs
->charger_present
;
885 u8 saved_battery_state
;
886 acpi_ac_get_present(sbs
);
887 if (sbs
->charger_present
!= saved_charger_state
) {
888 #ifdef CONFIG_ACPI_PROC_EVENT
889 acpi_bus_generate_proc_event4(ACPI_AC_CLASS
, ACPI_AC_DIR_NAME
,
890 ACPI_SBS_NOTIFY_STATUS
,
891 sbs
->charger_present
);
893 #ifdef CONFIG_ACPI_SYSFS_POWER
894 kobject_uevent(&sbs
->charger
.dev
->kobj
, KOBJ_CHANGE
);
897 if (sbs
->manager_present
) {
898 for (id
= 0; id
< MAX_SBS_BAT
; ++id
) {
899 if (!(sbs
->batteries_supported
& (1 << id
)))
901 bat
= &sbs
->battery
[id
];
902 saved_battery_state
= bat
->present
;
903 acpi_battery_read(bat
);
904 if (saved_battery_state
== bat
->present
)
906 #ifdef CONFIG_ACPI_PROC_EVENT
907 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS
,
909 ACPI_SBS_NOTIFY_STATUS
,
912 #ifdef CONFIG_ACPI_SYSFS_POWER
913 kobject_uevent(&bat
->bat
.dev
->kobj
, KOBJ_CHANGE
);
919 static int acpi_sbs_remove(struct acpi_device
*device
, int type
);
921 static int acpi_sbs_add(struct acpi_device
*device
)
923 struct acpi_sbs
*sbs
;
927 sbs
= kzalloc(sizeof(struct acpi_sbs
), GFP_KERNEL
);
933 mutex_init(&sbs
->lock
);
935 sbs
->hc
= acpi_driver_data(device
->parent
);
936 sbs
->device
= device
;
937 strcpy(acpi_device_name(device
), ACPI_SBS_DEVICE_NAME
);
938 strcpy(acpi_device_class(device
), ACPI_SBS_CLASS
);
939 device
->driver_data
= sbs
;
941 result
= acpi_charger_add(sbs
);
945 result
= acpi_manager_get_info(sbs
);
947 sbs
->manager_present
= 1;
948 for (id
= 0; id
< MAX_SBS_BAT
; ++id
)
949 if ((sbs
->batteries_supported
& (1 << id
)))
950 acpi_battery_add(sbs
, id
);
952 acpi_battery_add(sbs
, 0);
953 acpi_smbus_register_callback(sbs
->hc
, acpi_sbs_callback
, sbs
);
956 acpi_sbs_remove(device
, 0);
960 static int acpi_sbs_remove(struct acpi_device
*device
, int type
)
962 struct acpi_sbs
*sbs
;
967 sbs
= acpi_driver_data(device
);
970 mutex_lock(&sbs
->lock
);
971 acpi_smbus_unregister_callback(sbs
->hc
);
972 for (id
= 0; id
< MAX_SBS_BAT
; ++id
)
973 acpi_battery_remove(sbs
, id
);
974 acpi_charger_remove(sbs
);
975 mutex_unlock(&sbs
->lock
);
976 mutex_destroy(&sbs
->lock
);
981 static void acpi_sbs_rmdirs(void)
983 #ifdef CONFIG_ACPI_PROCFS_POWER
985 acpi_unlock_ac_dir(acpi_ac_dir
);
988 if (acpi_battery_dir
) {
989 acpi_unlock_battery_dir(acpi_battery_dir
);
990 acpi_battery_dir
= NULL
;
995 static int acpi_sbs_resume(struct acpi_device
*device
)
997 struct acpi_sbs
*sbs
;
1000 sbs
= device
->driver_data
;
1001 acpi_sbs_callback(sbs
);
1005 static struct acpi_driver acpi_sbs_driver
= {
1007 .class = ACPI_SBS_CLASS
,
1008 .ids
= sbs_device_ids
,
1010 .add
= acpi_sbs_add
,
1011 .remove
= acpi_sbs_remove
,
1012 .resume
= acpi_sbs_resume
,
1016 static int __init
acpi_sbs_init(void)
1022 #ifdef CONFIG_ACPI_PROCFS_POWER
1023 acpi_ac_dir
= acpi_lock_ac_dir();
1026 acpi_battery_dir
= acpi_lock_battery_dir();
1027 if (!acpi_battery_dir
) {
1032 result
= acpi_bus_register_driver(&acpi_sbs_driver
);
1040 static void __exit
acpi_sbs_exit(void)
1042 acpi_bus_unregister_driver(&acpi_sbs_driver
);
1047 module_init(acpi_sbs_init
);
1048 module_exit(acpi_sbs_exit
);