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 #include <linux/power_supply.h>
47 #define ACPI_SBS_CLASS "sbs"
48 #define ACPI_AC_CLASS "ac_adapter"
49 #define ACPI_BATTERY_CLASS "battery"
50 #define ACPI_SBS_DEVICE_NAME "Smart Battery System"
51 #define ACPI_SBS_FILE_INFO "info"
52 #define ACPI_SBS_FILE_STATE "state"
53 #define ACPI_SBS_FILE_ALARM "alarm"
54 #define ACPI_BATTERY_DIR_NAME "BAT%i"
55 #define ACPI_AC_DIR_NAME "AC0"
57 #define ACPI_SBS_NOTIFY_STATUS 0x80
58 #define ACPI_SBS_NOTIFY_INFO 0x81
60 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
61 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
62 MODULE_LICENSE("GPL");
64 static unsigned int cache_time
= 1000;
65 module_param(cache_time
, uint
, 0644);
66 MODULE_PARM_DESC(cache_time
, "cache time in milliseconds");
68 extern struct proc_dir_entry
*acpi_lock_ac_dir(void);
69 extern struct proc_dir_entry
*acpi_lock_battery_dir(void);
70 extern void acpi_unlock_ac_dir(struct proc_dir_entry
*acpi_ac_dir
);
71 extern void acpi_unlock_battery_dir(struct proc_dir_entry
*acpi_battery_dir
);
74 #define ACPI_SBS_BLOCK_MAX 32
76 static const struct acpi_device_id sbs_device_ids
[] = {
80 MODULE_DEVICE_TABLE(acpi
, sbs_device_ids
);
83 struct power_supply bat
;
85 #ifdef CONFIG_ACPI_PROCFS_POWER
86 struct proc_dir_entry
*proc_entry
;
88 unsigned long update_time
;
90 char manufacturer_name
[ACPI_SBS_BLOCK_MAX
];
91 char device_name
[ACPI_SBS_BLOCK_MAX
];
92 char device_chemistry
[ACPI_SBS_BLOCK_MAX
];
94 u16 full_charge_capacity
;
110 u8 have_sysfs_alarm
:1;
113 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
116 struct power_supply charger
;
117 struct acpi_device
*device
;
118 struct acpi_smb_hc
*hc
;
120 #ifdef CONFIG_ACPI_PROCFS_POWER
121 struct proc_dir_entry
*charger_entry
;
123 struct acpi_battery battery
[MAX_SBS_BAT
];
124 u8 batteries_supported
:4;
125 u8 manager_present
:1;
126 u8 charger_present
:1;
129 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
131 static inline int battery_scale(int log
)
139 static inline int acpi_battery_vscale(struct acpi_battery
*battery
)
141 return battery_scale((battery
->spec
& 0x0f00) >> 8);
144 static inline int acpi_battery_ipscale(struct acpi_battery
*battery
)
146 return battery_scale((battery
->spec
& 0xf000) >> 12);
149 static inline int acpi_battery_mode(struct acpi_battery
*battery
)
151 return (battery
->mode
& 0x8000);
154 static inline int acpi_battery_scale(struct acpi_battery
*battery
)
156 return (acpi_battery_mode(battery
) ? 10 : 1) *
157 acpi_battery_ipscale(battery
);
160 static int sbs_get_ac_property(struct power_supply
*psy
,
161 enum power_supply_property psp
,
162 union power_supply_propval
*val
)
164 struct acpi_sbs
*sbs
= to_acpi_sbs(psy
);
166 case POWER_SUPPLY_PROP_ONLINE
:
167 val
->intval
= sbs
->charger_present
;
175 static int acpi_battery_technology(struct acpi_battery
*battery
)
177 if (!strcasecmp("NiCd", battery
->device_chemistry
))
178 return POWER_SUPPLY_TECHNOLOGY_NiCd
;
179 if (!strcasecmp("NiMH", battery
->device_chemistry
))
180 return POWER_SUPPLY_TECHNOLOGY_NiMH
;
181 if (!strcasecmp("LION", battery
->device_chemistry
))
182 return POWER_SUPPLY_TECHNOLOGY_LION
;
183 if (!strcasecmp("LiP", battery
->device_chemistry
))
184 return POWER_SUPPLY_TECHNOLOGY_LIPO
;
185 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN
;
188 static int acpi_sbs_battery_get_property(struct power_supply
*psy
,
189 enum power_supply_property psp
,
190 union power_supply_propval
*val
)
192 struct acpi_battery
*battery
= to_acpi_battery(psy
);
194 if ((!battery
->present
) && psp
!= POWER_SUPPLY_PROP_PRESENT
)
197 case POWER_SUPPLY_PROP_STATUS
:
198 if (battery
->current_now
< 0)
199 val
->intval
= POWER_SUPPLY_STATUS_DISCHARGING
;
200 else if (battery
->current_now
> 0)
201 val
->intval
= POWER_SUPPLY_STATUS_CHARGING
;
203 val
->intval
= POWER_SUPPLY_STATUS_FULL
;
205 case POWER_SUPPLY_PROP_PRESENT
:
206 val
->intval
= battery
->present
;
208 case POWER_SUPPLY_PROP_TECHNOLOGY
:
209 val
->intval
= acpi_battery_technology(battery
);
211 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
:
212 val
->intval
= battery
->design_voltage
*
213 acpi_battery_vscale(battery
) * 1000;
215 case POWER_SUPPLY_PROP_VOLTAGE_NOW
:
216 val
->intval
= battery
->voltage_now
*
217 acpi_battery_vscale(battery
) * 1000;
219 case POWER_SUPPLY_PROP_CURRENT_NOW
:
220 val
->intval
= abs(battery
->current_now
) *
221 acpi_battery_ipscale(battery
) * 1000;
223 case POWER_SUPPLY_PROP_CURRENT_AVG
:
224 val
->intval
= abs(battery
->current_avg
) *
225 acpi_battery_ipscale(battery
) * 1000;
227 case POWER_SUPPLY_PROP_CAPACITY
:
228 val
->intval
= battery
->state_of_charge
;
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;
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;
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;
245 case POWER_SUPPLY_PROP_TEMP
:
246 val
->intval
= battery
->temp_now
- 2730; // dK -> dC
248 case POWER_SUPPLY_PROP_MODEL_NAME
:
249 val
->strval
= battery
->device_name
;
251 case POWER_SUPPLY_PROP_MANUFACTURER
:
252 val
->strval
= battery
->manufacturer_name
;
260 static enum power_supply_property sbs_ac_props
[] = {
261 POWER_SUPPLY_PROP_ONLINE
,
264 static 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_VOLTAGE_MIN_DESIGN
,
269 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
270 POWER_SUPPLY_PROP_CURRENT_NOW
,
271 POWER_SUPPLY_PROP_CURRENT_AVG
,
272 POWER_SUPPLY_PROP_CAPACITY
,
273 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
,
274 POWER_SUPPLY_PROP_CHARGE_FULL
,
275 POWER_SUPPLY_PROP_CHARGE_NOW
,
276 POWER_SUPPLY_PROP_TEMP
,
277 POWER_SUPPLY_PROP_MODEL_NAME
,
278 POWER_SUPPLY_PROP_MANUFACTURER
,
281 static enum power_supply_property sbs_energy_battery_props
[] = {
282 POWER_SUPPLY_PROP_STATUS
,
283 POWER_SUPPLY_PROP_PRESENT
,
284 POWER_SUPPLY_PROP_TECHNOLOGY
,
285 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
286 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
287 POWER_SUPPLY_PROP_CURRENT_NOW
,
288 POWER_SUPPLY_PROP_CURRENT_AVG
,
289 POWER_SUPPLY_PROP_CAPACITY
,
290 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
,
291 POWER_SUPPLY_PROP_ENERGY_FULL
,
292 POWER_SUPPLY_PROP_ENERGY_NOW
,
293 POWER_SUPPLY_PROP_TEMP
,
294 POWER_SUPPLY_PROP_MODEL_NAME
,
295 POWER_SUPPLY_PROP_MANUFACTURER
,
298 /* --------------------------------------------------------------------------
299 Smart Battery System Management
300 -------------------------------------------------------------------------- */
302 struct acpi_battery_reader
{
303 u8 command
; /* command for battery */
304 u8 mode
; /* word or block? */
305 size_t offset
; /* offset inside struct acpi_sbs_battery */
308 static struct acpi_battery_reader info_readers
[] = {
309 {0x01, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, alarm_capacity
)},
310 {0x03, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, mode
)},
311 {0x10, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, full_charge_capacity
)},
312 {0x17, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, cycle_count
)},
313 {0x18, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, design_capacity
)},
314 {0x19, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, design_voltage
)},
315 {0x1a, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, spec
)},
316 {0x1c, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, serial_number
)},
317 {0x20, SMBUS_READ_BLOCK
, offsetof(struct acpi_battery
, manufacturer_name
)},
318 {0x21, SMBUS_READ_BLOCK
, offsetof(struct acpi_battery
, device_name
)},
319 {0x22, SMBUS_READ_BLOCK
, offsetof(struct acpi_battery
, device_chemistry
)},
322 static struct acpi_battery_reader state_readers
[] = {
323 {0x08, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, temp_now
)},
324 {0x09, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, voltage_now
)},
325 {0x0a, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, current_now
)},
326 {0x0b, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, current_avg
)},
327 {0x0f, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, capacity_now
)},
328 {0x0e, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, state_of_charge
)},
329 {0x16, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, state
)},
332 static int acpi_manager_get_info(struct acpi_sbs
*sbs
)
335 u16 battery_system_info
;
337 result
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_MANAGER
,
338 0x04, (u8
*)&battery_system_info
);
340 sbs
->batteries_supported
= battery_system_info
& 0x000f;
344 static int acpi_battery_get_info(struct acpi_battery
*battery
)
348 for (i
= 0; i
< ARRAY_SIZE(info_readers
); ++i
) {
349 result
= acpi_smbus_read(battery
->sbs
->hc
,
350 info_readers
[i
].mode
,
352 info_readers
[i
].command
,
354 info_readers
[i
].offset
);
361 static int acpi_battery_get_state(struct acpi_battery
*battery
)
365 if (battery
->update_time
&&
366 time_before(jiffies
, battery
->update_time
+
367 msecs_to_jiffies(cache_time
)))
369 for (i
= 0; i
< ARRAY_SIZE(state_readers
); ++i
) {
370 result
= acpi_smbus_read(battery
->sbs
->hc
,
371 state_readers
[i
].mode
,
373 state_readers
[i
].command
,
375 state_readers
[i
].offset
);
380 battery
->update_time
= jiffies
;
384 static int acpi_battery_get_alarm(struct acpi_battery
*battery
)
386 return acpi_smbus_read(battery
->sbs
->hc
, SMBUS_READ_WORD
,
387 ACPI_SBS_BATTERY
, 0x01,
388 (u8
*)&battery
->alarm_capacity
);
391 static int acpi_battery_set_alarm(struct acpi_battery
*battery
)
393 struct acpi_sbs
*sbs
= battery
->sbs
;
394 u16 value
, sel
= 1 << (battery
->id
+ 12);
399 if (sbs
->manager_present
) {
400 ret
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_MANAGER
,
404 if ((value
& 0xf000) != sel
) {
407 ret
= acpi_smbus_write(sbs
->hc
, SMBUS_WRITE_WORD
,
409 0x01, (u8
*)&value
, 2);
414 ret
= acpi_smbus_write(sbs
->hc
, SMBUS_WRITE_WORD
, ACPI_SBS_BATTERY
,
415 0x01, (u8
*)&battery
->alarm_capacity
, 2);
420 static int acpi_ac_get_present(struct acpi_sbs
*sbs
)
425 result
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_CHARGER
,
426 0x13, (u8
*) & status
);
428 sbs
->charger_present
= (status
>> 15) & 0x1;
432 static ssize_t
acpi_battery_alarm_show(struct device
*dev
,
433 struct device_attribute
*attr
,
436 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
437 acpi_battery_get_alarm(battery
);
438 return sprintf(buf
, "%d\n", battery
->alarm_capacity
*
439 acpi_battery_scale(battery
) * 1000);
442 static ssize_t
acpi_battery_alarm_store(struct device
*dev
,
443 struct device_attribute
*attr
,
444 const char *buf
, size_t count
)
447 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
448 if (sscanf(buf
, "%ld\n", &x
) == 1)
449 battery
->alarm_capacity
= x
/
450 (1000 * acpi_battery_scale(battery
));
451 if (battery
->present
)
452 acpi_battery_set_alarm(battery
);
456 static struct device_attribute alarm_attr
= {
457 .attr
= {.name
= "alarm", .mode
= 0644, .owner
= THIS_MODULE
},
458 .show
= acpi_battery_alarm_show
,
459 .store
= acpi_battery_alarm_store
,
462 /* --------------------------------------------------------------------------
463 FS Interface (/proc/acpi)
464 -------------------------------------------------------------------------- */
466 #ifdef CONFIG_ACPI_PROCFS_POWER
467 /* Generic Routines */
469 acpi_sbs_add_fs(struct proc_dir_entry
**dir
,
470 struct proc_dir_entry
*parent_dir
,
472 struct file_operations
*info_fops
,
473 struct file_operations
*state_fops
,
474 struct file_operations
*alarm_fops
, void *data
)
476 struct proc_dir_entry
*entry
= NULL
;
479 *dir
= proc_mkdir(dir_name
, parent_dir
);
483 (*dir
)->owner
= THIS_MODULE
;
488 entry
= create_proc_entry(ACPI_SBS_FILE_INFO
, S_IRUGO
, *dir
);
490 entry
->proc_fops
= info_fops
;
492 entry
->owner
= THIS_MODULE
;
498 entry
= create_proc_entry(ACPI_SBS_FILE_STATE
, S_IRUGO
, *dir
);
500 entry
->proc_fops
= state_fops
;
502 entry
->owner
= THIS_MODULE
;
508 entry
= create_proc_entry(ACPI_SBS_FILE_ALARM
, S_IRUGO
, *dir
);
510 entry
->proc_fops
= alarm_fops
;
512 entry
->owner
= THIS_MODULE
;
519 acpi_sbs_remove_fs(struct proc_dir_entry
**dir
,
520 struct proc_dir_entry
*parent_dir
)
523 remove_proc_entry(ACPI_SBS_FILE_INFO
, *dir
);
524 remove_proc_entry(ACPI_SBS_FILE_STATE
, *dir
);
525 remove_proc_entry(ACPI_SBS_FILE_ALARM
, *dir
);
526 remove_proc_entry((*dir
)->name
, parent_dir
);
531 /* Smart Battery Interface */
532 static struct proc_dir_entry
*acpi_battery_dir
= NULL
;
534 static inline char *acpi_battery_units(struct acpi_battery
*battery
)
536 return acpi_battery_mode(battery
) ? " mW" : " mA";
540 static int acpi_battery_read_info(struct seq_file
*seq
, void *offset
)
542 struct acpi_battery
*battery
= seq
->private;
543 struct acpi_sbs
*sbs
= battery
->sbs
;
546 mutex_lock(&sbs
->lock
);
548 seq_printf(seq
, "present: %s\n",
549 (battery
->present
) ? "yes" : "no");
550 if (!battery
->present
)
553 seq_printf(seq
, "design capacity: %i%sh\n",
554 battery
->design_capacity
* acpi_battery_scale(battery
),
555 acpi_battery_units(battery
));
556 seq_printf(seq
, "last full capacity: %i%sh\n",
557 battery
->full_charge_capacity
* acpi_battery_scale(battery
),
558 acpi_battery_units(battery
));
559 seq_printf(seq
, "battery technology: rechargeable\n");
560 seq_printf(seq
, "design voltage: %i mV\n",
561 battery
->design_voltage
* acpi_battery_vscale(battery
));
562 seq_printf(seq
, "design capacity warning: unknown\n");
563 seq_printf(seq
, "design capacity low: unknown\n");
564 seq_printf(seq
, "capacity granularity 1: unknown\n");
565 seq_printf(seq
, "capacity granularity 2: unknown\n");
566 seq_printf(seq
, "model number: %s\n", battery
->device_name
);
567 seq_printf(seq
, "serial number: %i\n",
568 battery
->serial_number
);
569 seq_printf(seq
, "battery type: %s\n",
570 battery
->device_chemistry
);
571 seq_printf(seq
, "OEM info: %s\n",
572 battery
->manufacturer_name
);
574 mutex_unlock(&sbs
->lock
);
578 static int acpi_battery_info_open_fs(struct inode
*inode
, struct file
*file
)
580 return single_open(file
, acpi_battery_read_info
, PDE(inode
)->data
);
583 static int acpi_battery_read_state(struct seq_file
*seq
, void *offset
)
585 struct acpi_battery
*battery
= seq
->private;
586 struct acpi_sbs
*sbs
= battery
->sbs
;
589 mutex_lock(&sbs
->lock
);
590 seq_printf(seq
, "present: %s\n",
591 (battery
->present
) ? "yes" : "no");
592 if (!battery
->present
)
595 acpi_battery_get_state(battery
);
596 seq_printf(seq
, "capacity state: %s\n",
597 (battery
->state
& 0x0010) ? "critical" : "ok");
598 seq_printf(seq
, "charging state: %s\n",
599 (battery
->current_now
< 0) ? "discharging" :
600 ((battery
->current_now
> 0) ? "charging" : "charged"));
601 rate
= abs(battery
->current_now
) * acpi_battery_ipscale(battery
);
602 rate
*= (acpi_battery_mode(battery
))?(battery
->voltage_now
*
603 acpi_battery_vscale(battery
)/1000):1;
604 seq_printf(seq
, "present rate: %d%s\n", rate
,
605 acpi_battery_units(battery
));
606 seq_printf(seq
, "remaining capacity: %i%sh\n",
607 battery
->capacity_now
* acpi_battery_scale(battery
),
608 acpi_battery_units(battery
));
609 seq_printf(seq
, "present voltage: %i mV\n",
610 battery
->voltage_now
* acpi_battery_vscale(battery
));
613 mutex_unlock(&sbs
->lock
);
617 static int acpi_battery_state_open_fs(struct inode
*inode
, struct file
*file
)
619 return single_open(file
, acpi_battery_read_state
, PDE(inode
)->data
);
622 static int acpi_battery_read_alarm(struct seq_file
*seq
, void *offset
)
624 struct acpi_battery
*battery
= seq
->private;
625 struct acpi_sbs
*sbs
= battery
->sbs
;
628 mutex_lock(&sbs
->lock
);
630 if (!battery
->present
) {
631 seq_printf(seq
, "present: no\n");
635 acpi_battery_get_alarm(battery
);
636 seq_printf(seq
, "alarm: ");
637 if (battery
->alarm_capacity
)
638 seq_printf(seq
, "%i%sh\n",
639 battery
->alarm_capacity
*
640 acpi_battery_scale(battery
),
641 acpi_battery_units(battery
));
643 seq_printf(seq
, "disabled\n");
645 mutex_unlock(&sbs
->lock
);
650 acpi_battery_write_alarm(struct file
*file
, const char __user
* buffer
,
651 size_t count
, loff_t
* ppos
)
653 struct seq_file
*seq
= file
->private_data
;
654 struct acpi_battery
*battery
= seq
->private;
655 struct acpi_sbs
*sbs
= battery
->sbs
;
656 char alarm_string
[12] = { '\0' };
658 mutex_lock(&sbs
->lock
);
659 if (!battery
->present
) {
663 if (count
> sizeof(alarm_string
) - 1) {
667 if (copy_from_user(alarm_string
, buffer
, count
)) {
671 alarm_string
[count
] = 0;
672 battery
->alarm_capacity
= simple_strtoul(alarm_string
, NULL
, 0) /
673 acpi_battery_scale(battery
);
674 acpi_battery_set_alarm(battery
);
676 mutex_unlock(&sbs
->lock
);
682 static int acpi_battery_alarm_open_fs(struct inode
*inode
, struct file
*file
)
684 return single_open(file
, acpi_battery_read_alarm
, PDE(inode
)->data
);
687 static struct file_operations acpi_battery_info_fops
= {
688 .open
= acpi_battery_info_open_fs
,
691 .release
= single_release
,
692 .owner
= THIS_MODULE
,
695 static struct file_operations acpi_battery_state_fops
= {
696 .open
= acpi_battery_state_open_fs
,
699 .release
= single_release
,
700 .owner
= THIS_MODULE
,
703 static struct file_operations acpi_battery_alarm_fops
= {
704 .open
= acpi_battery_alarm_open_fs
,
706 .write
= acpi_battery_write_alarm
,
708 .release
= single_release
,
709 .owner
= THIS_MODULE
,
712 /* Legacy AC Adapter Interface */
714 static struct proc_dir_entry
*acpi_ac_dir
= NULL
;
716 static int acpi_ac_read_state(struct seq_file
*seq
, void *offset
)
719 struct acpi_sbs
*sbs
= seq
->private;
721 mutex_lock(&sbs
->lock
);
723 seq_printf(seq
, "state: %s\n",
724 sbs
->charger_present
? "on-line" : "off-line");
726 mutex_unlock(&sbs
->lock
);
730 static int acpi_ac_state_open_fs(struct inode
*inode
, struct file
*file
)
732 return single_open(file
, acpi_ac_read_state
, PDE(inode
)->data
);
735 static struct file_operations acpi_ac_state_fops
= {
736 .open
= acpi_ac_state_open_fs
,
739 .release
= single_release
,
740 .owner
= THIS_MODULE
,
745 /* --------------------------------------------------------------------------
747 -------------------------------------------------------------------------- */
748 static int acpi_battery_read(struct acpi_battery
*battery
)
750 int result
= 0, saved_present
= battery
->present
;
753 if (battery
->sbs
->manager_present
) {
754 result
= acpi_smbus_read(battery
->sbs
->hc
, SMBUS_READ_WORD
,
755 ACPI_SBS_MANAGER
, 0x01, (u8
*)&state
);
757 battery
->present
= state
& (1 << battery
->id
);
759 state
|= 1 << (battery
->id
+ 12);
760 acpi_smbus_write(battery
->sbs
->hc
, SMBUS_WRITE_WORD
,
761 ACPI_SBS_MANAGER
, 0x01, (u8
*)&state
, 2);
762 } else if (battery
->id
== 0)
763 battery
->present
= 1;
764 if (result
|| !battery
->present
)
767 if (saved_present
!= battery
->present
) {
768 battery
->update_time
= 0;
769 result
= acpi_battery_get_info(battery
);
773 result
= acpi_battery_get_state(battery
);
778 static int acpi_battery_add(struct acpi_sbs
*sbs
, int id
)
780 struct acpi_battery
*battery
= &sbs
->battery
[id
];
785 result
= acpi_battery_read(battery
);
789 sprintf(battery
->name
, ACPI_BATTERY_DIR_NAME
, id
);
790 #ifdef CONFIG_ACPI_PROCFS_POWER
791 acpi_sbs_add_fs(&battery
->proc_entry
, acpi_battery_dir
,
792 battery
->name
, &acpi_battery_info_fops
,
793 &acpi_battery_state_fops
, &acpi_battery_alarm_fops
,
796 battery
->bat
.name
= battery
->name
;
797 battery
->bat
.type
= POWER_SUPPLY_TYPE_BATTERY
;
798 if (!acpi_battery_mode(battery
)) {
799 battery
->bat
.properties
= sbs_charge_battery_props
;
800 battery
->bat
.num_properties
=
801 ARRAY_SIZE(sbs_charge_battery_props
);
803 battery
->bat
.properties
= sbs_energy_battery_props
;
804 battery
->bat
.num_properties
=
805 ARRAY_SIZE(sbs_energy_battery_props
);
807 battery
->bat
.get_property
= acpi_sbs_battery_get_property
;
808 result
= power_supply_register(&sbs
->device
->dev
, &battery
->bat
);
811 result
= device_create_file(battery
->bat
.dev
, &alarm_attr
);
814 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
, sbs
->battery
->present
? "present" : "absent");
822 static void acpi_battery_remove(struct acpi_sbs
*sbs
, int id
)
824 struct acpi_battery
*battery
= &sbs
->battery
[id
];
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
);
831 #ifdef CONFIG_ACPI_PROCFS_POWER
832 if (battery
->proc_entry
)
833 acpi_sbs_remove_fs(&battery
->proc_entry
, acpi_battery_dir
);
837 static int acpi_charger_add(struct acpi_sbs
*sbs
)
841 result
= acpi_ac_get_present(sbs
);
844 #ifdef CONFIG_ACPI_PROCFS_POWER
845 result
= acpi_sbs_add_fs(&sbs
->charger_entry
, acpi_ac_dir
,
846 ACPI_AC_DIR_NAME
, NULL
,
847 &acpi_ac_state_fops
, NULL
, sbs
);
851 sbs
->charger
.name
= "sbs-charger";
852 sbs
->charger
.type
= POWER_SUPPLY_TYPE_MAINS
;
853 sbs
->charger
.properties
= sbs_ac_props
;
854 sbs
->charger
.num_properties
= ARRAY_SIZE(sbs_ac_props
);
855 sbs
->charger
.get_property
= sbs_get_ac_property
;
856 power_supply_register(&sbs
->device
->dev
, &sbs
->charger
);
857 printk(KERN_INFO PREFIX
"%s [%s]: AC Adapter [%s] (%s)\n",
858 ACPI_SBS_DEVICE_NAME
, acpi_device_bid(sbs
->device
),
859 ACPI_AC_DIR_NAME
, sbs
->charger_present
? "on-line" : "off-line");
864 static void acpi_charger_remove(struct acpi_sbs
*sbs
)
866 if (sbs
->charger
.dev
)
867 power_supply_unregister(&sbs
->charger
);
868 #ifdef CONFIG_ACPI_PROCFS_POWER
869 if (sbs
->charger_entry
)
870 acpi_sbs_remove_fs(&sbs
->charger_entry
, acpi_ac_dir
);
874 void acpi_sbs_callback(void *context
)
877 struct acpi_sbs
*sbs
= context
;
878 struct acpi_battery
*bat
;
879 u8 saved_charger_state
= sbs
->charger_present
;
880 u8 saved_battery_state
;
881 acpi_ac_get_present(sbs
);
882 if (sbs
->charger_present
!= saved_charger_state
) {
883 #ifdef CONFIG_ACPI_PROC_EVENT
884 acpi_bus_generate_proc_event4(ACPI_AC_CLASS
, ACPI_AC_DIR_NAME
,
885 ACPI_SBS_NOTIFY_STATUS
,
886 sbs
->charger_present
);
888 kobject_uevent(&sbs
->charger
.dev
->kobj
, KOBJ_CHANGE
);
890 if (sbs
->manager_present
) {
891 for (id
= 0; id
< MAX_SBS_BAT
; ++id
) {
892 if (!(sbs
->batteries_supported
& (1 << id
)))
894 bat
= &sbs
->battery
[id
];
895 saved_battery_state
= bat
->present
;
896 acpi_battery_read(bat
);
897 if (saved_battery_state
== bat
->present
)
899 #ifdef CONFIG_ACPI_PROC_EVENT
900 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS
,
902 ACPI_SBS_NOTIFY_STATUS
,
905 kobject_uevent(&bat
->bat
.dev
->kobj
, KOBJ_CHANGE
);
910 static int acpi_sbs_remove(struct acpi_device
*device
, int type
);
912 static int acpi_sbs_add(struct acpi_device
*device
)
914 struct acpi_sbs
*sbs
;
918 sbs
= kzalloc(sizeof(struct acpi_sbs
), GFP_KERNEL
);
924 mutex_init(&sbs
->lock
);
926 sbs
->hc
= acpi_driver_data(device
->parent
);
927 sbs
->device
= device
;
928 strcpy(acpi_device_name(device
), ACPI_SBS_DEVICE_NAME
);
929 strcpy(acpi_device_class(device
), ACPI_SBS_CLASS
);
930 acpi_driver_data(device
) = sbs
;
932 result
= acpi_charger_add(sbs
);
936 result
= acpi_manager_get_info(sbs
);
938 sbs
->manager_present
= 1;
939 for (id
= 0; id
< MAX_SBS_BAT
; ++id
)
940 if ((sbs
->batteries_supported
& (1 << id
)))
941 acpi_battery_add(sbs
, id
);
943 acpi_battery_add(sbs
, 0);
944 acpi_smbus_register_callback(sbs
->hc
, acpi_sbs_callback
, sbs
);
947 acpi_sbs_remove(device
, 0);
951 static int acpi_sbs_remove(struct acpi_device
*device
, int type
)
953 struct acpi_sbs
*sbs
;
958 sbs
= acpi_driver_data(device
);
961 mutex_lock(&sbs
->lock
);
962 acpi_smbus_unregister_callback(sbs
->hc
);
963 for (id
= 0; id
< MAX_SBS_BAT
; ++id
)
964 acpi_battery_remove(sbs
, id
);
965 acpi_charger_remove(sbs
);
966 mutex_unlock(&sbs
->lock
);
967 mutex_destroy(&sbs
->lock
);
972 static void acpi_sbs_rmdirs(void)
974 #ifdef CONFIG_ACPI_PROCFS_POWER
976 acpi_unlock_ac_dir(acpi_ac_dir
);
979 if (acpi_battery_dir
) {
980 acpi_unlock_battery_dir(acpi_battery_dir
);
981 acpi_battery_dir
= NULL
;
986 static int acpi_sbs_resume(struct acpi_device
*device
)
988 struct acpi_sbs
*sbs
;
991 sbs
= device
->driver_data
;
992 acpi_sbs_callback(sbs
);
996 static struct acpi_driver acpi_sbs_driver
= {
998 .class = ACPI_SBS_CLASS
,
999 .ids
= sbs_device_ids
,
1001 .add
= acpi_sbs_add
,
1002 .remove
= acpi_sbs_remove
,
1003 .resume
= acpi_sbs_resume
,
1007 static int __init
acpi_sbs_init(void)
1013 #ifdef CONFIG_ACPI_PROCFS_POWER
1014 acpi_ac_dir
= acpi_lock_ac_dir();
1017 acpi_battery_dir
= acpi_lock_battery_dir();
1018 if (!acpi_battery_dir
) {
1023 result
= acpi_bus_register_driver(&acpi_sbs_driver
);
1031 static void __exit
acpi_sbs_exit(void)
1033 acpi_bus_unregister_driver(&acpi_sbs_driver
);
1038 module_init(acpi_sbs_init
);
1039 module_exit(acpi_sbs_exit
);