2 * battery.c - ACPI Battery Driver (Revision: 2.0)
4 * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
5 * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
6 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
7 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/types.h>
32 #include <linux/jiffies.h>
33 #include <linux/async.h>
35 #ifdef CONFIG_ACPI_PROCFS_POWER
36 #include <linux/proc_fs.h>
37 #include <linux/seq_file.h>
38 #include <asm/uaccess.h>
41 #include <acpi/acpi_bus.h>
42 #include <acpi/acpi_drivers.h>
44 #ifdef CONFIG_ACPI_SYSFS_POWER
45 #include <linux/power_supply.h>
48 #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
50 #define ACPI_BATTERY_CLASS "battery"
51 #define ACPI_BATTERY_DEVICE_NAME "Battery"
52 #define ACPI_BATTERY_NOTIFY_STATUS 0x80
53 #define ACPI_BATTERY_NOTIFY_INFO 0x81
55 #define _COMPONENT ACPI_BATTERY_COMPONENT
57 ACPI_MODULE_NAME("battery");
59 MODULE_AUTHOR("Paul Diefenbaugh");
60 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
61 MODULE_DESCRIPTION("ACPI Battery 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 #ifdef CONFIG_ACPI_PROCFS_POWER
69 extern struct proc_dir_entry
*acpi_lock_battery_dir(void);
70 extern void *acpi_unlock_battery_dir(struct proc_dir_entry
*acpi_battery_dir
);
72 enum acpi_battery_files
{
76 ACPI_BATTERY_NUMFILES
,
81 static const struct acpi_device_id battery_device_ids
[] = {
86 MODULE_DEVICE_TABLE(acpi
, battery_device_ids
);
91 #ifdef CONFIG_ACPI_SYSFS_POWER
92 struct power_supply bat
;
94 struct acpi_device
*device
;
95 unsigned long update_time
;
100 int full_charge_capacity
;
103 int design_capacity_warning
;
104 int design_capacity_low
;
105 int capacity_granularity_1
;
106 int capacity_granularity_2
;
108 char model_number
[32];
109 char serial_number
[32];
117 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
119 inline int acpi_battery_present(struct acpi_battery
*battery
)
121 return battery
->device
->status
.battery_present
;
124 #ifdef CONFIG_ACPI_SYSFS_POWER
125 static int acpi_battery_technology(struct acpi_battery
*battery
)
127 if (!strcasecmp("NiCd", battery
->type
))
128 return POWER_SUPPLY_TECHNOLOGY_NiCd
;
129 if (!strcasecmp("NiMH", battery
->type
))
130 return POWER_SUPPLY_TECHNOLOGY_NiMH
;
131 if (!strcasecmp("LION", battery
->type
))
132 return POWER_SUPPLY_TECHNOLOGY_LION
;
133 if (!strncasecmp("LI-ION", battery
->type
, 6))
134 return POWER_SUPPLY_TECHNOLOGY_LION
;
135 if (!strcasecmp("LiP", battery
->type
))
136 return POWER_SUPPLY_TECHNOLOGY_LIPO
;
137 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN
;
140 static int acpi_battery_get_state(struct acpi_battery
*battery
);
142 static int acpi_battery_is_charged(struct acpi_battery
*battery
)
144 /* either charging or discharging */
145 if (battery
->state
!= 0)
148 /* battery not reporting charge */
149 if (battery
->capacity_now
== ACPI_BATTERY_VALUE_UNKNOWN
||
150 battery
->capacity_now
== 0)
153 /* good batteries update full_charge as the batteries degrade */
154 if (battery
->full_charge_capacity
== battery
->capacity_now
)
157 /* fallback to using design values for broken batteries */
158 if (battery
->design_capacity
== battery
->capacity_now
)
161 /* we don't do any sort of metric based on percentages */
165 static int acpi_battery_get_property(struct power_supply
*psy
,
166 enum power_supply_property psp
,
167 union power_supply_propval
*val
)
169 struct acpi_battery
*battery
= to_acpi_battery(psy
);
171 if (acpi_battery_present(battery
)) {
172 /* run battery update only if it is present */
173 acpi_battery_get_state(battery
);
174 } else if (psp
!= POWER_SUPPLY_PROP_PRESENT
)
177 case POWER_SUPPLY_PROP_STATUS
:
178 if (battery
->state
& 0x01)
179 val
->intval
= POWER_SUPPLY_STATUS_DISCHARGING
;
180 else if (battery
->state
& 0x02)
181 val
->intval
= POWER_SUPPLY_STATUS_CHARGING
;
182 else if (acpi_battery_is_charged(battery
))
183 val
->intval
= POWER_SUPPLY_STATUS_FULL
;
185 val
->intval
= POWER_SUPPLY_STATUS_UNKNOWN
;
187 case POWER_SUPPLY_PROP_PRESENT
:
188 val
->intval
= acpi_battery_present(battery
);
190 case POWER_SUPPLY_PROP_TECHNOLOGY
:
191 val
->intval
= acpi_battery_technology(battery
);
193 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
:
194 val
->intval
= battery
->design_voltage
* 1000;
196 case POWER_SUPPLY_PROP_VOLTAGE_NOW
:
197 val
->intval
= battery
->voltage_now
* 1000;
199 case POWER_SUPPLY_PROP_CURRENT_NOW
:
200 case POWER_SUPPLY_PROP_POWER_NOW
:
201 val
->intval
= battery
->rate_now
* 1000;
203 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
:
204 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
:
205 val
->intval
= battery
->design_capacity
* 1000;
207 case POWER_SUPPLY_PROP_CHARGE_FULL
:
208 case POWER_SUPPLY_PROP_ENERGY_FULL
:
209 val
->intval
= battery
->full_charge_capacity
* 1000;
211 case POWER_SUPPLY_PROP_CHARGE_NOW
:
212 case POWER_SUPPLY_PROP_ENERGY_NOW
:
213 val
->intval
= battery
->capacity_now
* 1000;
215 case POWER_SUPPLY_PROP_MODEL_NAME
:
216 val
->strval
= battery
->model_number
;
218 case POWER_SUPPLY_PROP_MANUFACTURER
:
219 val
->strval
= battery
->oem_info
;
221 case POWER_SUPPLY_PROP_SERIAL_NUMBER
:
222 val
->strval
= battery
->serial_number
;
230 static enum power_supply_property charge_battery_props
[] = {
231 POWER_SUPPLY_PROP_STATUS
,
232 POWER_SUPPLY_PROP_PRESENT
,
233 POWER_SUPPLY_PROP_TECHNOLOGY
,
234 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
235 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
236 POWER_SUPPLY_PROP_CURRENT_NOW
,
237 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
,
238 POWER_SUPPLY_PROP_CHARGE_FULL
,
239 POWER_SUPPLY_PROP_CHARGE_NOW
,
240 POWER_SUPPLY_PROP_MODEL_NAME
,
241 POWER_SUPPLY_PROP_MANUFACTURER
,
242 POWER_SUPPLY_PROP_SERIAL_NUMBER
,
245 static enum power_supply_property energy_battery_props
[] = {
246 POWER_SUPPLY_PROP_STATUS
,
247 POWER_SUPPLY_PROP_PRESENT
,
248 POWER_SUPPLY_PROP_TECHNOLOGY
,
249 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
250 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
251 POWER_SUPPLY_PROP_CURRENT_NOW
,
252 POWER_SUPPLY_PROP_POWER_NOW
,
253 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
,
254 POWER_SUPPLY_PROP_ENERGY_FULL
,
255 POWER_SUPPLY_PROP_ENERGY_NOW
,
256 POWER_SUPPLY_PROP_MODEL_NAME
,
257 POWER_SUPPLY_PROP_MANUFACTURER
,
258 POWER_SUPPLY_PROP_SERIAL_NUMBER
,
262 #ifdef CONFIG_ACPI_PROCFS_POWER
263 inline char *acpi_battery_units(struct acpi_battery
*battery
)
265 return (battery
->power_unit
)?"mA":"mW";
269 /* --------------------------------------------------------------------------
271 -------------------------------------------------------------------------- */
272 struct acpi_offsets
{
273 size_t offset
; /* offset inside struct acpi_sbs_battery */
274 u8 mode
; /* int or string? */
277 static struct acpi_offsets state_offsets
[] = {
278 {offsetof(struct acpi_battery
, state
), 0},
279 {offsetof(struct acpi_battery
, rate_now
), 0},
280 {offsetof(struct acpi_battery
, capacity_now
), 0},
281 {offsetof(struct acpi_battery
, voltage_now
), 0},
284 static struct acpi_offsets info_offsets
[] = {
285 {offsetof(struct acpi_battery
, power_unit
), 0},
286 {offsetof(struct acpi_battery
, design_capacity
), 0},
287 {offsetof(struct acpi_battery
, full_charge_capacity
), 0},
288 {offsetof(struct acpi_battery
, technology
), 0},
289 {offsetof(struct acpi_battery
, design_voltage
), 0},
290 {offsetof(struct acpi_battery
, design_capacity_warning
), 0},
291 {offsetof(struct acpi_battery
, design_capacity_low
), 0},
292 {offsetof(struct acpi_battery
, capacity_granularity_1
), 0},
293 {offsetof(struct acpi_battery
, capacity_granularity_2
), 0},
294 {offsetof(struct acpi_battery
, model_number
), 1},
295 {offsetof(struct acpi_battery
, serial_number
), 1},
296 {offsetof(struct acpi_battery
, type
), 1},
297 {offsetof(struct acpi_battery
, oem_info
), 1},
300 static int extract_package(struct acpi_battery
*battery
,
301 union acpi_object
*package
,
302 struct acpi_offsets
*offsets
, int num
)
305 union acpi_object
*element
;
306 if (package
->type
!= ACPI_TYPE_PACKAGE
)
308 for (i
= 0; i
< num
; ++i
) {
309 if (package
->package
.count
<= i
)
311 element
= &package
->package
.elements
[i
];
312 if (offsets
[i
].mode
) {
313 u8
*ptr
= (u8
*)battery
+ offsets
[i
].offset
;
314 if (element
->type
== ACPI_TYPE_STRING
||
315 element
->type
== ACPI_TYPE_BUFFER
)
316 strncpy(ptr
, element
->string
.pointer
, 32);
317 else if (element
->type
== ACPI_TYPE_INTEGER
) {
318 strncpy(ptr
, (u8
*)&element
->integer
.value
,
319 sizeof(acpi_integer
));
320 ptr
[sizeof(acpi_integer
)] = 0;
322 *ptr
= 0; /* don't have value */
324 int *x
= (int *)((u8
*)battery
+ offsets
[i
].offset
);
325 *x
= (element
->type
== ACPI_TYPE_INTEGER
) ?
326 element
->integer
.value
: -1;
332 static int acpi_battery_get_status(struct acpi_battery
*battery
)
334 if (acpi_bus_get_status(battery
->device
)) {
335 ACPI_EXCEPTION((AE_INFO
, AE_ERROR
, "Evaluating _STA"));
341 static int acpi_battery_get_info(struct acpi_battery
*battery
)
343 int result
= -EFAULT
;
344 acpi_status status
= 0;
345 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
347 if (!acpi_battery_present(battery
))
349 mutex_lock(&battery
->lock
);
350 status
= acpi_evaluate_object(battery
->device
->handle
, "_BIF",
352 mutex_unlock(&battery
->lock
);
354 if (ACPI_FAILURE(status
)) {
355 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _BIF"));
359 result
= extract_package(battery
, buffer
.pointer
,
360 info_offsets
, ARRAY_SIZE(info_offsets
));
361 kfree(buffer
.pointer
);
365 static int acpi_battery_get_state(struct acpi_battery
*battery
)
368 acpi_status status
= 0;
369 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
371 if (!acpi_battery_present(battery
))
374 if (battery
->update_time
&&
375 time_before(jiffies
, battery
->update_time
+
376 msecs_to_jiffies(cache_time
)))
379 mutex_lock(&battery
->lock
);
380 status
= acpi_evaluate_object(battery
->device
->handle
, "_BST",
382 mutex_unlock(&battery
->lock
);
384 if (ACPI_FAILURE(status
)) {
385 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _BST"));
389 result
= extract_package(battery
, buffer
.pointer
,
390 state_offsets
, ARRAY_SIZE(state_offsets
));
391 battery
->update_time
= jiffies
;
392 kfree(buffer
.pointer
);
396 static int acpi_battery_set_alarm(struct acpi_battery
*battery
)
398 acpi_status status
= 0;
399 union acpi_object arg0
= { .type
= ACPI_TYPE_INTEGER
};
400 struct acpi_object_list arg_list
= { 1, &arg0
};
402 if (!acpi_battery_present(battery
)|| !battery
->alarm_present
)
405 arg0
.integer
.value
= battery
->alarm
;
407 mutex_lock(&battery
->lock
);
408 status
= acpi_evaluate_object(battery
->device
->handle
, "_BTP",
410 mutex_unlock(&battery
->lock
);
412 if (ACPI_FAILURE(status
))
415 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Alarm set to %d\n", battery
->alarm
));
419 static int acpi_battery_init_alarm(struct acpi_battery
*battery
)
421 acpi_status status
= AE_OK
;
422 acpi_handle handle
= NULL
;
424 /* See if alarms are supported, and if so, set default */
425 status
= acpi_get_handle(battery
->device
->handle
, "_BTP", &handle
);
426 if (ACPI_FAILURE(status
)) {
427 battery
->alarm_present
= 0;
430 battery
->alarm_present
= 1;
432 battery
->alarm
= battery
->design_capacity_warning
;
433 return acpi_battery_set_alarm(battery
);
436 #ifdef CONFIG_ACPI_SYSFS_POWER
437 static ssize_t
acpi_battery_alarm_show(struct device
*dev
,
438 struct device_attribute
*attr
,
441 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
442 return sprintf(buf
, "%d\n", battery
->alarm
* 1000);
445 static ssize_t
acpi_battery_alarm_store(struct device
*dev
,
446 struct device_attribute
*attr
,
447 const char *buf
, size_t count
)
450 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
451 if (sscanf(buf
, "%ld\n", &x
) == 1)
452 battery
->alarm
= x
/1000;
453 if (acpi_battery_present(battery
))
454 acpi_battery_set_alarm(battery
);
458 static struct device_attribute alarm_attr
= {
459 .attr
= {.name
= "alarm", .mode
= 0644},
460 .show
= acpi_battery_alarm_show
,
461 .store
= acpi_battery_alarm_store
,
464 static int sysfs_add_battery(struct acpi_battery
*battery
)
468 if (battery
->power_unit
) {
469 battery
->bat
.properties
= charge_battery_props
;
470 battery
->bat
.num_properties
=
471 ARRAY_SIZE(charge_battery_props
);
473 battery
->bat
.properties
= energy_battery_props
;
474 battery
->bat
.num_properties
=
475 ARRAY_SIZE(energy_battery_props
);
478 battery
->bat
.name
= acpi_device_bid(battery
->device
);
479 battery
->bat
.type
= POWER_SUPPLY_TYPE_BATTERY
;
480 battery
->bat
.get_property
= acpi_battery_get_property
;
482 result
= power_supply_register(&battery
->device
->dev
, &battery
->bat
);
485 return device_create_file(battery
->bat
.dev
, &alarm_attr
);
488 static void sysfs_remove_battery(struct acpi_battery
*battery
)
490 if (!battery
->bat
.dev
)
492 device_remove_file(battery
->bat
.dev
, &alarm_attr
);
493 power_supply_unregister(&battery
->bat
);
494 battery
->bat
.dev
= NULL
;
498 static int acpi_battery_update(struct acpi_battery
*battery
)
500 int result
, old_present
= acpi_battery_present(battery
);
501 result
= acpi_battery_get_status(battery
);
504 #ifdef CONFIG_ACPI_SYSFS_POWER
505 if (!acpi_battery_present(battery
)) {
506 sysfs_remove_battery(battery
);
507 battery
->update_time
= 0;
511 if (!battery
->update_time
||
512 old_present
!= acpi_battery_present(battery
)) {
513 result
= acpi_battery_get_info(battery
);
516 acpi_battery_init_alarm(battery
);
518 #ifdef CONFIG_ACPI_SYSFS_POWER
519 if (!battery
->bat
.dev
)
520 sysfs_add_battery(battery
);
522 return acpi_battery_get_state(battery
);
525 /* --------------------------------------------------------------------------
527 -------------------------------------------------------------------------- */
529 #ifdef CONFIG_ACPI_PROCFS_POWER
530 static struct proc_dir_entry
*acpi_battery_dir
;
532 static int acpi_battery_print_info(struct seq_file
*seq
, int result
)
534 struct acpi_battery
*battery
= seq
->private;
539 seq_printf(seq
, "present: %s\n",
540 acpi_battery_present(battery
)?"yes":"no");
541 if (!acpi_battery_present(battery
))
543 if (battery
->design_capacity
== ACPI_BATTERY_VALUE_UNKNOWN
)
544 seq_printf(seq
, "design capacity: unknown\n");
546 seq_printf(seq
, "design capacity: %d %sh\n",
547 battery
->design_capacity
,
548 acpi_battery_units(battery
));
550 if (battery
->full_charge_capacity
== ACPI_BATTERY_VALUE_UNKNOWN
)
551 seq_printf(seq
, "last full capacity: unknown\n");
553 seq_printf(seq
, "last full capacity: %d %sh\n",
554 battery
->full_charge_capacity
,
555 acpi_battery_units(battery
));
557 seq_printf(seq
, "battery technology: %srechargeable\n",
558 (!battery
->technology
)?"non-":"");
560 if (battery
->design_voltage
== ACPI_BATTERY_VALUE_UNKNOWN
)
561 seq_printf(seq
, "design voltage: unknown\n");
563 seq_printf(seq
, "design voltage: %d mV\n",
564 battery
->design_voltage
);
565 seq_printf(seq
, "design capacity warning: %d %sh\n",
566 battery
->design_capacity_warning
,
567 acpi_battery_units(battery
));
568 seq_printf(seq
, "design capacity low: %d %sh\n",
569 battery
->design_capacity_low
,
570 acpi_battery_units(battery
));
571 seq_printf(seq
, "capacity granularity 1: %d %sh\n",
572 battery
->capacity_granularity_1
,
573 acpi_battery_units(battery
));
574 seq_printf(seq
, "capacity granularity 2: %d %sh\n",
575 battery
->capacity_granularity_2
,
576 acpi_battery_units(battery
));
577 seq_printf(seq
, "model number: %s\n", battery
->model_number
);
578 seq_printf(seq
, "serial number: %s\n", battery
->serial_number
);
579 seq_printf(seq
, "battery type: %s\n", battery
->type
);
580 seq_printf(seq
, "OEM info: %s\n", battery
->oem_info
);
583 seq_printf(seq
, "ERROR: Unable to read battery info\n");
587 static int acpi_battery_print_state(struct seq_file
*seq
, int result
)
589 struct acpi_battery
*battery
= seq
->private;
594 seq_printf(seq
, "present: %s\n",
595 acpi_battery_present(battery
)?"yes":"no");
596 if (!acpi_battery_present(battery
))
599 seq_printf(seq
, "capacity state: %s\n",
600 (battery
->state
& 0x04)?"critical":"ok");
601 if ((battery
->state
& 0x01) && (battery
->state
& 0x02))
603 "charging state: charging/discharging\n");
604 else if (battery
->state
& 0x01)
605 seq_printf(seq
, "charging state: discharging\n");
606 else if (battery
->state
& 0x02)
607 seq_printf(seq
, "charging state: charging\n");
609 seq_printf(seq
, "charging state: charged\n");
611 if (battery
->rate_now
== ACPI_BATTERY_VALUE_UNKNOWN
)
612 seq_printf(seq
, "present rate: unknown\n");
614 seq_printf(seq
, "present rate: %d %s\n",
615 battery
->rate_now
, acpi_battery_units(battery
));
617 if (battery
->capacity_now
== ACPI_BATTERY_VALUE_UNKNOWN
)
618 seq_printf(seq
, "remaining capacity: unknown\n");
620 seq_printf(seq
, "remaining capacity: %d %sh\n",
621 battery
->capacity_now
, acpi_battery_units(battery
));
622 if (battery
->voltage_now
== ACPI_BATTERY_VALUE_UNKNOWN
)
623 seq_printf(seq
, "present voltage: unknown\n");
625 seq_printf(seq
, "present voltage: %d mV\n",
626 battery
->voltage_now
);
629 seq_printf(seq
, "ERROR: Unable to read battery state\n");
634 static int acpi_battery_print_alarm(struct seq_file
*seq
, int result
)
636 struct acpi_battery
*battery
= seq
->private;
641 if (!acpi_battery_present(battery
)) {
642 seq_printf(seq
, "present: no\n");
645 seq_printf(seq
, "alarm: ");
647 seq_printf(seq
, "unsupported\n");
649 seq_printf(seq
, "%u %sh\n", battery
->alarm
,
650 acpi_battery_units(battery
));
653 seq_printf(seq
, "ERROR: Unable to read battery alarm\n");
657 static ssize_t
acpi_battery_write_alarm(struct file
*file
,
658 const char __user
* buffer
,
659 size_t count
, loff_t
* ppos
)
662 char alarm_string
[12] = { '\0' };
663 struct seq_file
*m
= file
->private_data
;
664 struct acpi_battery
*battery
= m
->private;
666 if (!battery
|| (count
> sizeof(alarm_string
) - 1))
668 if (!acpi_battery_present(battery
)) {
672 if (copy_from_user(alarm_string
, buffer
, count
)) {
676 alarm_string
[count
] = '\0';
677 battery
->alarm
= simple_strtol(alarm_string
, NULL
, 0);
678 result
= acpi_battery_set_alarm(battery
);
685 typedef int(*print_func
)(struct seq_file
*seq
, int result
);
687 static print_func acpi_print_funcs
[ACPI_BATTERY_NUMFILES
] = {
688 acpi_battery_print_info
,
689 acpi_battery_print_state
,
690 acpi_battery_print_alarm
,
693 static int acpi_battery_read(int fid
, struct seq_file
*seq
)
695 struct acpi_battery
*battery
= seq
->private;
696 int result
= acpi_battery_update(battery
);
697 return acpi_print_funcs
[fid
](seq
, result
);
700 #define DECLARE_FILE_FUNCTIONS(_name) \
701 static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
703 return acpi_battery_read(_name##_tag, seq); \
705 static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
707 return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
710 DECLARE_FILE_FUNCTIONS(info
);
711 DECLARE_FILE_FUNCTIONS(state
);
712 DECLARE_FILE_FUNCTIONS(alarm
);
714 #undef DECLARE_FILE_FUNCTIONS
716 #define FILE_DESCRIPTION_RO(_name) \
718 .name = __stringify(_name), \
721 .open = acpi_battery_##_name##_open_fs, \
723 .llseek = seq_lseek, \
724 .release = single_release, \
725 .owner = THIS_MODULE, \
729 #define FILE_DESCRIPTION_RW(_name) \
731 .name = __stringify(_name), \
732 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
734 .open = acpi_battery_##_name##_open_fs, \
736 .llseek = seq_lseek, \
737 .write = acpi_battery_write_##_name, \
738 .release = single_release, \
739 .owner = THIS_MODULE, \
743 static struct battery_file
{
744 struct file_operations ops
;
747 } acpi_battery_file
[] = {
748 FILE_DESCRIPTION_RO(info
),
749 FILE_DESCRIPTION_RO(state
),
750 FILE_DESCRIPTION_RW(alarm
),
753 #undef FILE_DESCRIPTION_RO
754 #undef FILE_DESCRIPTION_RW
756 static int acpi_battery_add_fs(struct acpi_device
*device
)
758 struct proc_dir_entry
*entry
= NULL
;
761 if (!acpi_device_dir(device
)) {
762 acpi_device_dir(device
) = proc_mkdir(acpi_device_bid(device
),
764 if (!acpi_device_dir(device
))
768 for (i
= 0; i
< ACPI_BATTERY_NUMFILES
; ++i
) {
769 entry
= proc_create_data(acpi_battery_file
[i
].name
,
770 acpi_battery_file
[i
].mode
,
771 acpi_device_dir(device
),
772 &acpi_battery_file
[i
].ops
,
773 acpi_driver_data(device
));
780 static void acpi_battery_remove_fs(struct acpi_device
*device
)
783 if (!acpi_device_dir(device
))
785 for (i
= 0; i
< ACPI_BATTERY_NUMFILES
; ++i
)
786 remove_proc_entry(acpi_battery_file
[i
].name
,
787 acpi_device_dir(device
));
789 remove_proc_entry(acpi_device_bid(device
), acpi_battery_dir
);
790 acpi_device_dir(device
) = NULL
;
795 /* --------------------------------------------------------------------------
797 -------------------------------------------------------------------------- */
799 static void acpi_battery_notify(acpi_handle handle
, u32 event
, void *data
)
801 struct acpi_battery
*battery
= data
;
802 struct acpi_device
*device
;
805 device
= battery
->device
;
806 acpi_battery_update(battery
);
807 acpi_bus_generate_proc_event(device
, event
,
808 acpi_battery_present(battery
));
809 acpi_bus_generate_netlink_event(device
->pnp
.device_class
,
810 dev_name(&device
->dev
), event
,
811 acpi_battery_present(battery
));
812 #ifdef CONFIG_ACPI_SYSFS_POWER
813 /* acpi_batter_update could remove power_supply object */
814 if (battery
->bat
.dev
)
815 kobject_uevent(&battery
->bat
.dev
->kobj
, KOBJ_CHANGE
);
819 static int acpi_battery_add(struct acpi_device
*device
)
822 acpi_status status
= 0;
823 struct acpi_battery
*battery
= NULL
;
826 battery
= kzalloc(sizeof(struct acpi_battery
), GFP_KERNEL
);
829 battery
->device
= device
;
830 strcpy(acpi_device_name(device
), ACPI_BATTERY_DEVICE_NAME
);
831 strcpy(acpi_device_class(device
), ACPI_BATTERY_CLASS
);
832 device
->driver_data
= battery
;
833 mutex_init(&battery
->lock
);
834 acpi_battery_update(battery
);
835 #ifdef CONFIG_ACPI_PROCFS_POWER
836 result
= acpi_battery_add_fs(device
);
840 status
= acpi_install_notify_handler(device
->handle
,
842 acpi_battery_notify
, battery
);
843 if (ACPI_FAILURE(status
)) {
844 ACPI_EXCEPTION((AE_INFO
, status
, "Installing notify handler"));
848 printk(KERN_INFO PREFIX
"%s Slot [%s] (battery %s)\n",
849 ACPI_BATTERY_DEVICE_NAME
, acpi_device_bid(device
),
850 device
->status
.battery_present
? "present" : "absent");
853 #ifdef CONFIG_ACPI_PROCFS_POWER
854 acpi_battery_remove_fs(device
);
861 static int acpi_battery_remove(struct acpi_device
*device
, int type
)
863 acpi_status status
= 0;
864 struct acpi_battery
*battery
= NULL
;
866 if (!device
|| !acpi_driver_data(device
))
868 battery
= acpi_driver_data(device
);
869 status
= acpi_remove_notify_handler(device
->handle
,
871 acpi_battery_notify
);
872 #ifdef CONFIG_ACPI_PROCFS_POWER
873 acpi_battery_remove_fs(device
);
875 #ifdef CONFIG_ACPI_SYSFS_POWER
876 sysfs_remove_battery(battery
);
878 mutex_destroy(&battery
->lock
);
883 /* this is needed to learn about changes made in suspended state */
884 static int acpi_battery_resume(struct acpi_device
*device
)
886 struct acpi_battery
*battery
;
889 battery
= acpi_driver_data(device
);
890 battery
->update_time
= 0;
891 acpi_battery_update(battery
);
895 static struct acpi_driver acpi_battery_driver
= {
897 .class = ACPI_BATTERY_CLASS
,
898 .ids
= battery_device_ids
,
900 .add
= acpi_battery_add
,
901 .resume
= acpi_battery_resume
,
902 .remove
= acpi_battery_remove
,
906 static void acpi_battery_init_async(void *unused
, async_cookie_t cookie
)
910 #ifdef CONFIG_ACPI_PROCFS_POWER
911 acpi_battery_dir
= acpi_lock_battery_dir();
912 if (!acpi_battery_dir
)
915 if (acpi_bus_register_driver(&acpi_battery_driver
) < 0) {
916 #ifdef CONFIG_ACPI_PROCFS_POWER
917 acpi_unlock_battery_dir(acpi_battery_dir
);
924 static int __init
acpi_battery_init(void)
926 async_schedule(acpi_battery_init_async
, NULL
);
930 static void __exit
acpi_battery_exit(void)
932 acpi_bus_unregister_driver(&acpi_battery_driver
);
933 #ifdef CONFIG_ACPI_PROCFS_POWER
934 acpi_unlock_battery_dir(acpi_battery_dir
);
938 module_init(acpi_battery_init
);
939 module_exit(acpi_battery_exit
);