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 PREFIX "ACPI: "
50 #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
52 #define ACPI_BATTERY_CLASS "battery"
53 #define ACPI_BATTERY_DEVICE_NAME "Battery"
54 #define ACPI_BATTERY_NOTIFY_STATUS 0x80
55 #define ACPI_BATTERY_NOTIFY_INFO 0x81
57 #define _COMPONENT ACPI_BATTERY_COMPONENT
59 ACPI_MODULE_NAME("battery");
61 MODULE_AUTHOR("Paul Diefenbaugh");
62 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
63 MODULE_DESCRIPTION("ACPI Battery 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 #ifdef CONFIG_ACPI_PROCFS_POWER
71 extern struct proc_dir_entry
*acpi_lock_battery_dir(void);
72 extern void *acpi_unlock_battery_dir(struct proc_dir_entry
*acpi_battery_dir
);
74 enum acpi_battery_files
{
78 ACPI_BATTERY_NUMFILES
,
83 static const struct acpi_device_id battery_device_ids
[] = {
88 MODULE_DEVICE_TABLE(acpi
, battery_device_ids
);
93 #ifdef CONFIG_ACPI_SYSFS_POWER
94 struct power_supply bat
;
96 struct acpi_device
*device
;
97 unsigned long update_time
;
102 int full_charge_capacity
;
105 int design_capacity_warning
;
106 int design_capacity_low
;
107 int capacity_granularity_1
;
108 int capacity_granularity_2
;
110 char model_number
[32];
111 char serial_number
[32];
119 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
121 inline int acpi_battery_present(struct acpi_battery
*battery
)
123 return battery
->device
->status
.battery_present
;
126 #ifdef CONFIG_ACPI_SYSFS_POWER
127 static int acpi_battery_technology(struct acpi_battery
*battery
)
129 if (!strcasecmp("NiCd", battery
->type
))
130 return POWER_SUPPLY_TECHNOLOGY_NiCd
;
131 if (!strcasecmp("NiMH", battery
->type
))
132 return POWER_SUPPLY_TECHNOLOGY_NiMH
;
133 if (!strcasecmp("LION", battery
->type
))
134 return POWER_SUPPLY_TECHNOLOGY_LION
;
135 if (!strncasecmp("LI-ION", battery
->type
, 6))
136 return POWER_SUPPLY_TECHNOLOGY_LION
;
137 if (!strcasecmp("LiP", battery
->type
))
138 return POWER_SUPPLY_TECHNOLOGY_LIPO
;
139 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN
;
142 static int acpi_battery_get_state(struct acpi_battery
*battery
);
144 static int acpi_battery_is_charged(struct acpi_battery
*battery
)
146 /* either charging or discharging */
147 if (battery
->state
!= 0)
150 /* battery not reporting charge */
151 if (battery
->capacity_now
== ACPI_BATTERY_VALUE_UNKNOWN
||
152 battery
->capacity_now
== 0)
155 /* good batteries update full_charge as the batteries degrade */
156 if (battery
->full_charge_capacity
== battery
->capacity_now
)
159 /* fallback to using design values for broken batteries */
160 if (battery
->design_capacity
== battery
->capacity_now
)
163 /* we don't do any sort of metric based on percentages */
167 static int acpi_battery_get_property(struct power_supply
*psy
,
168 enum power_supply_property psp
,
169 union power_supply_propval
*val
)
171 struct acpi_battery
*battery
= to_acpi_battery(psy
);
173 if (acpi_battery_present(battery
)) {
174 /* run battery update only if it is present */
175 acpi_battery_get_state(battery
);
176 } else if (psp
!= POWER_SUPPLY_PROP_PRESENT
)
179 case POWER_SUPPLY_PROP_STATUS
:
180 if (battery
->state
& 0x01)
181 val
->intval
= POWER_SUPPLY_STATUS_DISCHARGING
;
182 else if (battery
->state
& 0x02)
183 val
->intval
= POWER_SUPPLY_STATUS_CHARGING
;
184 else if (acpi_battery_is_charged(battery
))
185 val
->intval
= POWER_SUPPLY_STATUS_FULL
;
187 val
->intval
= POWER_SUPPLY_STATUS_UNKNOWN
;
189 case POWER_SUPPLY_PROP_PRESENT
:
190 val
->intval
= acpi_battery_present(battery
);
192 case POWER_SUPPLY_PROP_TECHNOLOGY
:
193 val
->intval
= acpi_battery_technology(battery
);
195 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
:
196 val
->intval
= battery
->design_voltage
* 1000;
198 case POWER_SUPPLY_PROP_VOLTAGE_NOW
:
199 val
->intval
= battery
->voltage_now
* 1000;
201 case POWER_SUPPLY_PROP_CURRENT_NOW
:
202 case POWER_SUPPLY_PROP_POWER_NOW
:
203 val
->intval
= battery
->rate_now
* 1000;
205 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
:
206 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
:
207 val
->intval
= battery
->design_capacity
* 1000;
209 case POWER_SUPPLY_PROP_CHARGE_FULL
:
210 case POWER_SUPPLY_PROP_ENERGY_FULL
:
211 val
->intval
= battery
->full_charge_capacity
* 1000;
213 case POWER_SUPPLY_PROP_CHARGE_NOW
:
214 case POWER_SUPPLY_PROP_ENERGY_NOW
:
215 val
->intval
= battery
->capacity_now
* 1000;
217 case POWER_SUPPLY_PROP_MODEL_NAME
:
218 val
->strval
= battery
->model_number
;
220 case POWER_SUPPLY_PROP_MANUFACTURER
:
221 val
->strval
= battery
->oem_info
;
223 case POWER_SUPPLY_PROP_SERIAL_NUMBER
:
224 val
->strval
= battery
->serial_number
;
232 static enum power_supply_property charge_battery_props
[] = {
233 POWER_SUPPLY_PROP_STATUS
,
234 POWER_SUPPLY_PROP_PRESENT
,
235 POWER_SUPPLY_PROP_TECHNOLOGY
,
236 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
237 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
238 POWER_SUPPLY_PROP_CURRENT_NOW
,
239 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
,
240 POWER_SUPPLY_PROP_CHARGE_FULL
,
241 POWER_SUPPLY_PROP_CHARGE_NOW
,
242 POWER_SUPPLY_PROP_MODEL_NAME
,
243 POWER_SUPPLY_PROP_MANUFACTURER
,
244 POWER_SUPPLY_PROP_SERIAL_NUMBER
,
247 static enum power_supply_property energy_battery_props
[] = {
248 POWER_SUPPLY_PROP_STATUS
,
249 POWER_SUPPLY_PROP_PRESENT
,
250 POWER_SUPPLY_PROP_TECHNOLOGY
,
251 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
252 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
253 POWER_SUPPLY_PROP_CURRENT_NOW
,
254 POWER_SUPPLY_PROP_POWER_NOW
,
255 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
,
256 POWER_SUPPLY_PROP_ENERGY_FULL
,
257 POWER_SUPPLY_PROP_ENERGY_NOW
,
258 POWER_SUPPLY_PROP_MODEL_NAME
,
259 POWER_SUPPLY_PROP_MANUFACTURER
,
260 POWER_SUPPLY_PROP_SERIAL_NUMBER
,
264 #ifdef CONFIG_ACPI_PROCFS_POWER
265 inline char *acpi_battery_units(struct acpi_battery
*battery
)
267 return (battery
->power_unit
)?"mA":"mW";
271 /* --------------------------------------------------------------------------
273 -------------------------------------------------------------------------- */
274 struct acpi_offsets
{
275 size_t offset
; /* offset inside struct acpi_sbs_battery */
276 u8 mode
; /* int or string? */
279 static struct acpi_offsets state_offsets
[] = {
280 {offsetof(struct acpi_battery
, state
), 0},
281 {offsetof(struct acpi_battery
, rate_now
), 0},
282 {offsetof(struct acpi_battery
, capacity_now
), 0},
283 {offsetof(struct acpi_battery
, voltage_now
), 0},
286 static struct acpi_offsets info_offsets
[] = {
287 {offsetof(struct acpi_battery
, power_unit
), 0},
288 {offsetof(struct acpi_battery
, design_capacity
), 0},
289 {offsetof(struct acpi_battery
, full_charge_capacity
), 0},
290 {offsetof(struct acpi_battery
, technology
), 0},
291 {offsetof(struct acpi_battery
, design_voltage
), 0},
292 {offsetof(struct acpi_battery
, design_capacity_warning
), 0},
293 {offsetof(struct acpi_battery
, design_capacity_low
), 0},
294 {offsetof(struct acpi_battery
, capacity_granularity_1
), 0},
295 {offsetof(struct acpi_battery
, capacity_granularity_2
), 0},
296 {offsetof(struct acpi_battery
, model_number
), 1},
297 {offsetof(struct acpi_battery
, serial_number
), 1},
298 {offsetof(struct acpi_battery
, type
), 1},
299 {offsetof(struct acpi_battery
, oem_info
), 1},
302 static int extract_package(struct acpi_battery
*battery
,
303 union acpi_object
*package
,
304 struct acpi_offsets
*offsets
, int num
)
307 union acpi_object
*element
;
308 if (package
->type
!= ACPI_TYPE_PACKAGE
)
310 for (i
= 0; i
< num
; ++i
) {
311 if (package
->package
.count
<= i
)
313 element
= &package
->package
.elements
[i
];
314 if (offsets
[i
].mode
) {
315 u8
*ptr
= (u8
*)battery
+ offsets
[i
].offset
;
316 if (element
->type
== ACPI_TYPE_STRING
||
317 element
->type
== ACPI_TYPE_BUFFER
)
318 strncpy(ptr
, element
->string
.pointer
, 32);
319 else if (element
->type
== ACPI_TYPE_INTEGER
) {
320 strncpy(ptr
, (u8
*)&element
->integer
.value
,
321 sizeof(acpi_integer
));
322 ptr
[sizeof(acpi_integer
)] = 0;
324 *ptr
= 0; /* don't have value */
326 int *x
= (int *)((u8
*)battery
+ offsets
[i
].offset
);
327 *x
= (element
->type
== ACPI_TYPE_INTEGER
) ?
328 element
->integer
.value
: -1;
334 static int acpi_battery_get_status(struct acpi_battery
*battery
)
336 if (acpi_bus_get_status(battery
->device
)) {
337 ACPI_EXCEPTION((AE_INFO
, AE_ERROR
, "Evaluating _STA"));
343 static int acpi_battery_get_info(struct acpi_battery
*battery
)
345 int result
= -EFAULT
;
346 acpi_status status
= 0;
347 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
349 if (!acpi_battery_present(battery
))
351 mutex_lock(&battery
->lock
);
352 status
= acpi_evaluate_object(battery
->device
->handle
, "_BIF",
354 mutex_unlock(&battery
->lock
);
356 if (ACPI_FAILURE(status
)) {
357 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _BIF"));
361 result
= extract_package(battery
, buffer
.pointer
,
362 info_offsets
, ARRAY_SIZE(info_offsets
));
363 kfree(buffer
.pointer
);
367 static int acpi_battery_get_state(struct acpi_battery
*battery
)
370 acpi_status status
= 0;
371 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
373 if (!acpi_battery_present(battery
))
376 if (battery
->update_time
&&
377 time_before(jiffies
, battery
->update_time
+
378 msecs_to_jiffies(cache_time
)))
381 mutex_lock(&battery
->lock
);
382 status
= acpi_evaluate_object(battery
->device
->handle
, "_BST",
384 mutex_unlock(&battery
->lock
);
386 if (ACPI_FAILURE(status
)) {
387 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _BST"));
391 result
= extract_package(battery
, buffer
.pointer
,
392 state_offsets
, ARRAY_SIZE(state_offsets
));
393 battery
->update_time
= jiffies
;
394 kfree(buffer
.pointer
);
398 static int acpi_battery_set_alarm(struct acpi_battery
*battery
)
400 acpi_status status
= 0;
401 union acpi_object arg0
= { .type
= ACPI_TYPE_INTEGER
};
402 struct acpi_object_list arg_list
= { 1, &arg0
};
404 if (!acpi_battery_present(battery
)|| !battery
->alarm_present
)
407 arg0
.integer
.value
= battery
->alarm
;
409 mutex_lock(&battery
->lock
);
410 status
= acpi_evaluate_object(battery
->device
->handle
, "_BTP",
412 mutex_unlock(&battery
->lock
);
414 if (ACPI_FAILURE(status
))
417 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Alarm set to %d\n", battery
->alarm
));
421 static int acpi_battery_init_alarm(struct acpi_battery
*battery
)
423 acpi_status status
= AE_OK
;
424 acpi_handle handle
= NULL
;
426 /* See if alarms are supported, and if so, set default */
427 status
= acpi_get_handle(battery
->device
->handle
, "_BTP", &handle
);
428 if (ACPI_FAILURE(status
)) {
429 battery
->alarm_present
= 0;
432 battery
->alarm_present
= 1;
434 battery
->alarm
= battery
->design_capacity_warning
;
435 return acpi_battery_set_alarm(battery
);
438 #ifdef CONFIG_ACPI_SYSFS_POWER
439 static ssize_t
acpi_battery_alarm_show(struct device
*dev
,
440 struct device_attribute
*attr
,
443 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
444 return sprintf(buf
, "%d\n", battery
->alarm
* 1000);
447 static ssize_t
acpi_battery_alarm_store(struct device
*dev
,
448 struct device_attribute
*attr
,
449 const char *buf
, size_t count
)
452 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
453 if (sscanf(buf
, "%ld\n", &x
) == 1)
454 battery
->alarm
= x
/1000;
455 if (acpi_battery_present(battery
))
456 acpi_battery_set_alarm(battery
);
460 static struct device_attribute alarm_attr
= {
461 .attr
= {.name
= "alarm", .mode
= 0644},
462 .show
= acpi_battery_alarm_show
,
463 .store
= acpi_battery_alarm_store
,
466 static int sysfs_add_battery(struct acpi_battery
*battery
)
470 if (battery
->power_unit
) {
471 battery
->bat
.properties
= charge_battery_props
;
472 battery
->bat
.num_properties
=
473 ARRAY_SIZE(charge_battery_props
);
475 battery
->bat
.properties
= energy_battery_props
;
476 battery
->bat
.num_properties
=
477 ARRAY_SIZE(energy_battery_props
);
480 battery
->bat
.name
= acpi_device_bid(battery
->device
);
481 battery
->bat
.type
= POWER_SUPPLY_TYPE_BATTERY
;
482 battery
->bat
.get_property
= acpi_battery_get_property
;
484 result
= power_supply_register(&battery
->device
->dev
, &battery
->bat
);
487 return device_create_file(battery
->bat
.dev
, &alarm_attr
);
490 static void sysfs_remove_battery(struct acpi_battery
*battery
)
492 if (!battery
->bat
.dev
)
494 device_remove_file(battery
->bat
.dev
, &alarm_attr
);
495 power_supply_unregister(&battery
->bat
);
496 battery
->bat
.dev
= NULL
;
500 static int acpi_battery_update(struct acpi_battery
*battery
)
502 int result
, old_present
= acpi_battery_present(battery
);
503 result
= acpi_battery_get_status(battery
);
506 #ifdef CONFIG_ACPI_SYSFS_POWER
507 if (!acpi_battery_present(battery
)) {
508 sysfs_remove_battery(battery
);
509 battery
->update_time
= 0;
513 if (!battery
->update_time
||
514 old_present
!= acpi_battery_present(battery
)) {
515 result
= acpi_battery_get_info(battery
);
518 acpi_battery_init_alarm(battery
);
520 #ifdef CONFIG_ACPI_SYSFS_POWER
521 if (!battery
->bat
.dev
)
522 sysfs_add_battery(battery
);
524 return acpi_battery_get_state(battery
);
527 /* --------------------------------------------------------------------------
529 -------------------------------------------------------------------------- */
531 #ifdef CONFIG_ACPI_PROCFS_POWER
532 static struct proc_dir_entry
*acpi_battery_dir
;
534 static int acpi_battery_print_info(struct seq_file
*seq
, int result
)
536 struct acpi_battery
*battery
= seq
->private;
541 seq_printf(seq
, "present: %s\n",
542 acpi_battery_present(battery
)?"yes":"no");
543 if (!acpi_battery_present(battery
))
545 if (battery
->design_capacity
== ACPI_BATTERY_VALUE_UNKNOWN
)
546 seq_printf(seq
, "design capacity: unknown\n");
548 seq_printf(seq
, "design capacity: %d %sh\n",
549 battery
->design_capacity
,
550 acpi_battery_units(battery
));
552 if (battery
->full_charge_capacity
== ACPI_BATTERY_VALUE_UNKNOWN
)
553 seq_printf(seq
, "last full capacity: unknown\n");
555 seq_printf(seq
, "last full capacity: %d %sh\n",
556 battery
->full_charge_capacity
,
557 acpi_battery_units(battery
));
559 seq_printf(seq
, "battery technology: %srechargeable\n",
560 (!battery
->technology
)?"non-":"");
562 if (battery
->design_voltage
== ACPI_BATTERY_VALUE_UNKNOWN
)
563 seq_printf(seq
, "design voltage: unknown\n");
565 seq_printf(seq
, "design voltage: %d mV\n",
566 battery
->design_voltage
);
567 seq_printf(seq
, "design capacity warning: %d %sh\n",
568 battery
->design_capacity_warning
,
569 acpi_battery_units(battery
));
570 seq_printf(seq
, "design capacity low: %d %sh\n",
571 battery
->design_capacity_low
,
572 acpi_battery_units(battery
));
573 seq_printf(seq
, "capacity granularity 1: %d %sh\n",
574 battery
->capacity_granularity_1
,
575 acpi_battery_units(battery
));
576 seq_printf(seq
, "capacity granularity 2: %d %sh\n",
577 battery
->capacity_granularity_2
,
578 acpi_battery_units(battery
));
579 seq_printf(seq
, "model number: %s\n", battery
->model_number
);
580 seq_printf(seq
, "serial number: %s\n", battery
->serial_number
);
581 seq_printf(seq
, "battery type: %s\n", battery
->type
);
582 seq_printf(seq
, "OEM info: %s\n", battery
->oem_info
);
585 seq_printf(seq
, "ERROR: Unable to read battery info\n");
589 static int acpi_battery_print_state(struct seq_file
*seq
, int result
)
591 struct acpi_battery
*battery
= seq
->private;
596 seq_printf(seq
, "present: %s\n",
597 acpi_battery_present(battery
)?"yes":"no");
598 if (!acpi_battery_present(battery
))
601 seq_printf(seq
, "capacity state: %s\n",
602 (battery
->state
& 0x04)?"critical":"ok");
603 if ((battery
->state
& 0x01) && (battery
->state
& 0x02))
605 "charging state: charging/discharging\n");
606 else if (battery
->state
& 0x01)
607 seq_printf(seq
, "charging state: discharging\n");
608 else if (battery
->state
& 0x02)
609 seq_printf(seq
, "charging state: charging\n");
611 seq_printf(seq
, "charging state: charged\n");
613 if (battery
->rate_now
== ACPI_BATTERY_VALUE_UNKNOWN
)
614 seq_printf(seq
, "present rate: unknown\n");
616 seq_printf(seq
, "present rate: %d %s\n",
617 battery
->rate_now
, acpi_battery_units(battery
));
619 if (battery
->capacity_now
== ACPI_BATTERY_VALUE_UNKNOWN
)
620 seq_printf(seq
, "remaining capacity: unknown\n");
622 seq_printf(seq
, "remaining capacity: %d %sh\n",
623 battery
->capacity_now
, acpi_battery_units(battery
));
624 if (battery
->voltage_now
== ACPI_BATTERY_VALUE_UNKNOWN
)
625 seq_printf(seq
, "present voltage: unknown\n");
627 seq_printf(seq
, "present voltage: %d mV\n",
628 battery
->voltage_now
);
631 seq_printf(seq
, "ERROR: Unable to read battery state\n");
636 static int acpi_battery_print_alarm(struct seq_file
*seq
, int result
)
638 struct acpi_battery
*battery
= seq
->private;
643 if (!acpi_battery_present(battery
)) {
644 seq_printf(seq
, "present: no\n");
647 seq_printf(seq
, "alarm: ");
649 seq_printf(seq
, "unsupported\n");
651 seq_printf(seq
, "%u %sh\n", battery
->alarm
,
652 acpi_battery_units(battery
));
655 seq_printf(seq
, "ERROR: Unable to read battery alarm\n");
659 static ssize_t
acpi_battery_write_alarm(struct file
*file
,
660 const char __user
* buffer
,
661 size_t count
, loff_t
* ppos
)
664 char alarm_string
[12] = { '\0' };
665 struct seq_file
*m
= file
->private_data
;
666 struct acpi_battery
*battery
= m
->private;
668 if (!battery
|| (count
> sizeof(alarm_string
) - 1))
670 if (!acpi_battery_present(battery
)) {
674 if (copy_from_user(alarm_string
, buffer
, count
)) {
678 alarm_string
[count
] = '\0';
679 battery
->alarm
= simple_strtol(alarm_string
, NULL
, 0);
680 result
= acpi_battery_set_alarm(battery
);
687 typedef int(*print_func
)(struct seq_file
*seq
, int result
);
689 static print_func acpi_print_funcs
[ACPI_BATTERY_NUMFILES
] = {
690 acpi_battery_print_info
,
691 acpi_battery_print_state
,
692 acpi_battery_print_alarm
,
695 static int acpi_battery_read(int fid
, struct seq_file
*seq
)
697 struct acpi_battery
*battery
= seq
->private;
698 int result
= acpi_battery_update(battery
);
699 return acpi_print_funcs
[fid
](seq
, result
);
702 #define DECLARE_FILE_FUNCTIONS(_name) \
703 static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
705 return acpi_battery_read(_name##_tag, seq); \
707 static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
709 return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
712 DECLARE_FILE_FUNCTIONS(info
);
713 DECLARE_FILE_FUNCTIONS(state
);
714 DECLARE_FILE_FUNCTIONS(alarm
);
716 #undef DECLARE_FILE_FUNCTIONS
718 #define FILE_DESCRIPTION_RO(_name) \
720 .name = __stringify(_name), \
723 .open = acpi_battery_##_name##_open_fs, \
725 .llseek = seq_lseek, \
726 .release = single_release, \
727 .owner = THIS_MODULE, \
731 #define FILE_DESCRIPTION_RW(_name) \
733 .name = __stringify(_name), \
734 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
736 .open = acpi_battery_##_name##_open_fs, \
738 .llseek = seq_lseek, \
739 .write = acpi_battery_write_##_name, \
740 .release = single_release, \
741 .owner = THIS_MODULE, \
745 static struct battery_file
{
746 struct file_operations ops
;
749 } acpi_battery_file
[] = {
750 FILE_DESCRIPTION_RO(info
),
751 FILE_DESCRIPTION_RO(state
),
752 FILE_DESCRIPTION_RW(alarm
),
755 #undef FILE_DESCRIPTION_RO
756 #undef FILE_DESCRIPTION_RW
758 static int acpi_battery_add_fs(struct acpi_device
*device
)
760 struct proc_dir_entry
*entry
= NULL
;
763 if (!acpi_device_dir(device
)) {
764 acpi_device_dir(device
) = proc_mkdir(acpi_device_bid(device
),
766 if (!acpi_device_dir(device
))
770 for (i
= 0; i
< ACPI_BATTERY_NUMFILES
; ++i
) {
771 entry
= proc_create_data(acpi_battery_file
[i
].name
,
772 acpi_battery_file
[i
].mode
,
773 acpi_device_dir(device
),
774 &acpi_battery_file
[i
].ops
,
775 acpi_driver_data(device
));
782 static void acpi_battery_remove_fs(struct acpi_device
*device
)
785 if (!acpi_device_dir(device
))
787 for (i
= 0; i
< ACPI_BATTERY_NUMFILES
; ++i
)
788 remove_proc_entry(acpi_battery_file
[i
].name
,
789 acpi_device_dir(device
));
791 remove_proc_entry(acpi_device_bid(device
), acpi_battery_dir
);
792 acpi_device_dir(device
) = NULL
;
797 /* --------------------------------------------------------------------------
799 -------------------------------------------------------------------------- */
801 static void acpi_battery_notify(struct acpi_device
*device
, u32 event
)
803 struct acpi_battery
*battery
= acpi_driver_data(device
);
807 acpi_battery_update(battery
);
808 acpi_bus_generate_proc_event(device
, event
,
809 acpi_battery_present(battery
));
810 acpi_bus_generate_netlink_event(device
->pnp
.device_class
,
811 dev_name(&device
->dev
), event
,
812 acpi_battery_present(battery
));
813 #ifdef CONFIG_ACPI_SYSFS_POWER
814 /* acpi_batter_update could remove power_supply object */
815 if (battery
->bat
.dev
)
816 kobject_uevent(&battery
->bat
.dev
->kobj
, KOBJ_CHANGE
);
820 static int acpi_battery_add(struct acpi_device
*device
)
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
);
839 printk(KERN_INFO PREFIX
"%s Slot [%s] (battery %s)\n",
840 ACPI_BATTERY_DEVICE_NAME
, acpi_device_bid(device
),
841 device
->status
.battery_present
? "present" : "absent");
843 #ifdef CONFIG_ACPI_PROCFS_POWER
844 acpi_battery_remove_fs(device
);
851 static int acpi_battery_remove(struct acpi_device
*device
, int type
)
853 struct acpi_battery
*battery
= NULL
;
855 if (!device
|| !acpi_driver_data(device
))
857 battery
= acpi_driver_data(device
);
858 #ifdef CONFIG_ACPI_PROCFS_POWER
859 acpi_battery_remove_fs(device
);
861 #ifdef CONFIG_ACPI_SYSFS_POWER
862 sysfs_remove_battery(battery
);
864 mutex_destroy(&battery
->lock
);
869 /* this is needed to learn about changes made in suspended state */
870 static int acpi_battery_resume(struct acpi_device
*device
)
872 struct acpi_battery
*battery
;
875 battery
= acpi_driver_data(device
);
876 battery
->update_time
= 0;
877 acpi_battery_update(battery
);
881 static struct acpi_driver acpi_battery_driver
= {
883 .class = ACPI_BATTERY_CLASS
,
884 .ids
= battery_device_ids
,
885 .flags
= ACPI_DRIVER_ALL_NOTIFY_EVENTS
,
887 .add
= acpi_battery_add
,
888 .resume
= acpi_battery_resume
,
889 .remove
= acpi_battery_remove
,
890 .notify
= acpi_battery_notify
,
894 static void __init
acpi_battery_init_async(void *unused
, async_cookie_t cookie
)
898 #ifdef CONFIG_ACPI_PROCFS_POWER
899 acpi_battery_dir
= acpi_lock_battery_dir();
900 if (!acpi_battery_dir
)
903 if (acpi_bus_register_driver(&acpi_battery_driver
) < 0) {
904 #ifdef CONFIG_ACPI_PROCFS_POWER
905 acpi_unlock_battery_dir(acpi_battery_dir
);
912 static int __init
acpi_battery_init(void)
914 async_schedule(acpi_battery_init_async
, NULL
);
918 static void __exit
acpi_battery_exit(void)
920 acpi_bus_unregister_driver(&acpi_battery_driver
);
921 #ifdef CONFIG_ACPI_PROCFS_POWER
922 acpi_unlock_battery_dir(acpi_battery_dir
);
926 module_init(acpi_battery_init
);
927 module_exit(acpi_battery_exit
);