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
->current_now
< 0)
206 val
->intval
= POWER_SUPPLY_STATUS_DISCHARGING
;
207 else if (battery
->current_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 val
->intval
= abs(battery
->current_now
) *
228 acpi_battery_ipscale(battery
) * 1000;
230 case POWER_SUPPLY_PROP_CURRENT_AVG
:
231 val
->intval
= abs(battery
->current_avg
) *
232 acpi_battery_ipscale(battery
) * 1000;
234 case POWER_SUPPLY_PROP_CAPACITY
:
235 val
->intval
= battery
->state_of_charge
;
237 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
:
238 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
:
239 val
->intval
= battery
->design_capacity
*
240 acpi_battery_scale(battery
) * 1000;
242 case POWER_SUPPLY_PROP_CHARGE_FULL
:
243 case POWER_SUPPLY_PROP_ENERGY_FULL
:
244 val
->intval
= battery
->full_charge_capacity
*
245 acpi_battery_scale(battery
) * 1000;
247 case POWER_SUPPLY_PROP_CHARGE_NOW
:
248 case POWER_SUPPLY_PROP_ENERGY_NOW
:
249 val
->intval
= battery
->capacity_now
*
250 acpi_battery_scale(battery
) * 1000;
252 case POWER_SUPPLY_PROP_TEMP
:
253 val
->intval
= battery
->temp_now
- 2730; // dK -> dC
255 case POWER_SUPPLY_PROP_MODEL_NAME
:
256 val
->strval
= battery
->device_name
;
258 case POWER_SUPPLY_PROP_MANUFACTURER
:
259 val
->strval
= battery
->manufacturer_name
;
267 static enum power_supply_property sbs_ac_props
[] = {
268 POWER_SUPPLY_PROP_ONLINE
,
271 static enum power_supply_property sbs_charge_battery_props
[] = {
272 POWER_SUPPLY_PROP_STATUS
,
273 POWER_SUPPLY_PROP_PRESENT
,
274 POWER_SUPPLY_PROP_TECHNOLOGY
,
275 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
276 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
277 POWER_SUPPLY_PROP_CURRENT_NOW
,
278 POWER_SUPPLY_PROP_CURRENT_AVG
,
279 POWER_SUPPLY_PROP_CAPACITY
,
280 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
,
281 POWER_SUPPLY_PROP_CHARGE_FULL
,
282 POWER_SUPPLY_PROP_CHARGE_NOW
,
283 POWER_SUPPLY_PROP_TEMP
,
284 POWER_SUPPLY_PROP_MODEL_NAME
,
285 POWER_SUPPLY_PROP_MANUFACTURER
,
288 static enum power_supply_property sbs_energy_battery_props
[] = {
289 POWER_SUPPLY_PROP_STATUS
,
290 POWER_SUPPLY_PROP_PRESENT
,
291 POWER_SUPPLY_PROP_TECHNOLOGY
,
292 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
293 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
294 POWER_SUPPLY_PROP_CURRENT_NOW
,
295 POWER_SUPPLY_PROP_CURRENT_AVG
,
296 POWER_SUPPLY_PROP_CAPACITY
,
297 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
,
298 POWER_SUPPLY_PROP_ENERGY_FULL
,
299 POWER_SUPPLY_PROP_ENERGY_NOW
,
300 POWER_SUPPLY_PROP_TEMP
,
301 POWER_SUPPLY_PROP_MODEL_NAME
,
302 POWER_SUPPLY_PROP_MANUFACTURER
,
306 /* --------------------------------------------------------------------------
307 Smart Battery System Management
308 -------------------------------------------------------------------------- */
310 struct acpi_battery_reader
{
311 u8 command
; /* command for battery */
312 u8 mode
; /* word or block? */
313 size_t offset
; /* offset inside struct acpi_sbs_battery */
316 static struct acpi_battery_reader info_readers
[] = {
317 {0x01, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, alarm_capacity
)},
318 {0x03, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, mode
)},
319 {0x10, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, full_charge_capacity
)},
320 {0x17, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, cycle_count
)},
321 {0x18, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, design_capacity
)},
322 {0x19, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, design_voltage
)},
323 {0x1a, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, spec
)},
324 {0x1c, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, serial_number
)},
325 {0x20, SMBUS_READ_BLOCK
, offsetof(struct acpi_battery
, manufacturer_name
)},
326 {0x21, SMBUS_READ_BLOCK
, offsetof(struct acpi_battery
, device_name
)},
327 {0x22, SMBUS_READ_BLOCK
, offsetof(struct acpi_battery
, device_chemistry
)},
330 static struct acpi_battery_reader state_readers
[] = {
331 {0x08, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, temp_now
)},
332 {0x09, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, voltage_now
)},
333 {0x0a, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, current_now
)},
334 {0x0b, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, current_avg
)},
335 {0x0f, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, capacity_now
)},
336 {0x0e, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, state_of_charge
)},
337 {0x16, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, state
)},
340 static int acpi_manager_get_info(struct acpi_sbs
*sbs
)
343 u16 battery_system_info
;
345 result
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_MANAGER
,
346 0x04, (u8
*)&battery_system_info
);
348 sbs
->batteries_supported
= battery_system_info
& 0x000f;
352 static int acpi_battery_get_info(struct acpi_battery
*battery
)
356 for (i
= 0; i
< ARRAY_SIZE(info_readers
); ++i
) {
357 result
= acpi_smbus_read(battery
->sbs
->hc
,
358 info_readers
[i
].mode
,
360 info_readers
[i
].command
,
362 info_readers
[i
].offset
);
369 static int acpi_battery_get_state(struct acpi_battery
*battery
)
373 if (battery
->update_time
&&
374 time_before(jiffies
, battery
->update_time
+
375 msecs_to_jiffies(cache_time
)))
377 for (i
= 0; i
< ARRAY_SIZE(state_readers
); ++i
) {
378 result
= acpi_smbus_read(battery
->sbs
->hc
,
379 state_readers
[i
].mode
,
381 state_readers
[i
].command
,
383 state_readers
[i
].offset
);
388 battery
->update_time
= jiffies
;
392 static int acpi_battery_get_alarm(struct acpi_battery
*battery
)
394 return acpi_smbus_read(battery
->sbs
->hc
, SMBUS_READ_WORD
,
395 ACPI_SBS_BATTERY
, 0x01,
396 (u8
*)&battery
->alarm_capacity
);
399 static int acpi_battery_set_alarm(struct acpi_battery
*battery
)
401 struct acpi_sbs
*sbs
= battery
->sbs
;
402 u16 value
, sel
= 1 << (battery
->id
+ 12);
407 if (sbs
->manager_present
) {
408 ret
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_MANAGER
,
412 if ((value
& 0xf000) != sel
) {
415 ret
= acpi_smbus_write(sbs
->hc
, SMBUS_WRITE_WORD
,
417 0x01, (u8
*)&value
, 2);
422 ret
= acpi_smbus_write(sbs
->hc
, SMBUS_WRITE_WORD
, ACPI_SBS_BATTERY
,
423 0x01, (u8
*)&battery
->alarm_capacity
, 2);
428 static int acpi_ac_get_present(struct acpi_sbs
*sbs
)
433 result
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_CHARGER
,
434 0x13, (u8
*) & status
);
436 sbs
->charger_present
= (status
>> 15) & 0x1;
440 #ifdef CONFIG_ACPI_SYSFS_POWER
441 static ssize_t
acpi_battery_alarm_show(struct device
*dev
,
442 struct device_attribute
*attr
,
445 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
446 acpi_battery_get_alarm(battery
);
447 return sprintf(buf
, "%d\n", battery
->alarm_capacity
*
448 acpi_battery_scale(battery
) * 1000);
451 static ssize_t
acpi_battery_alarm_store(struct device
*dev
,
452 struct device_attribute
*attr
,
453 const char *buf
, size_t count
)
456 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
457 if (sscanf(buf
, "%ld\n", &x
) == 1)
458 battery
->alarm_capacity
= x
/
459 (1000 * acpi_battery_scale(battery
));
460 if (battery
->present
)
461 acpi_battery_set_alarm(battery
);
465 static struct device_attribute alarm_attr
= {
466 .attr
= {.name
= "alarm", .mode
= 0644},
467 .show
= acpi_battery_alarm_show
,
468 .store
= acpi_battery_alarm_store
,
472 /* --------------------------------------------------------------------------
473 FS Interface (/proc/acpi)
474 -------------------------------------------------------------------------- */
476 #ifdef CONFIG_ACPI_PROCFS_POWER
477 /* Generic Routines */
479 acpi_sbs_add_fs(struct proc_dir_entry
**dir
,
480 struct proc_dir_entry
*parent_dir
,
482 const struct file_operations
*info_fops
,
483 const struct file_operations
*state_fops
,
484 const struct file_operations
*alarm_fops
, void *data
)
487 *dir
= proc_mkdir(dir_name
, parent_dir
);
491 (*dir
)->owner
= THIS_MODULE
;
496 proc_create_data(ACPI_SBS_FILE_INFO
, S_IRUGO
, *dir
,
501 proc_create_data(ACPI_SBS_FILE_STATE
, S_IRUGO
, *dir
,
506 proc_create_data(ACPI_SBS_FILE_ALARM
, S_IRUGO
, *dir
,
512 acpi_sbs_remove_fs(struct proc_dir_entry
**dir
,
513 struct proc_dir_entry
*parent_dir
)
516 remove_proc_entry(ACPI_SBS_FILE_INFO
, *dir
);
517 remove_proc_entry(ACPI_SBS_FILE_STATE
, *dir
);
518 remove_proc_entry(ACPI_SBS_FILE_ALARM
, *dir
);
519 remove_proc_entry((*dir
)->name
, parent_dir
);
524 /* Smart Battery Interface */
525 static struct proc_dir_entry
*acpi_battery_dir
= NULL
;
527 static inline char *acpi_battery_units(struct acpi_battery
*battery
)
529 return acpi_battery_mode(battery
) ? " mW" : " mA";
533 static int acpi_battery_read_info(struct seq_file
*seq
, void *offset
)
535 struct acpi_battery
*battery
= seq
->private;
536 struct acpi_sbs
*sbs
= battery
->sbs
;
539 mutex_lock(&sbs
->lock
);
541 seq_printf(seq
, "present: %s\n",
542 (battery
->present
) ? "yes" : "no");
543 if (!battery
->present
)
546 seq_printf(seq
, "design capacity: %i%sh\n",
547 battery
->design_capacity
* acpi_battery_scale(battery
),
548 acpi_battery_units(battery
));
549 seq_printf(seq
, "last full capacity: %i%sh\n",
550 battery
->full_charge_capacity
* acpi_battery_scale(battery
),
551 acpi_battery_units(battery
));
552 seq_printf(seq
, "battery technology: rechargeable\n");
553 seq_printf(seq
, "design voltage: %i mV\n",
554 battery
->design_voltage
* acpi_battery_vscale(battery
));
555 seq_printf(seq
, "design capacity warning: unknown\n");
556 seq_printf(seq
, "design capacity low: unknown\n");
557 seq_printf(seq
, "capacity granularity 1: unknown\n");
558 seq_printf(seq
, "capacity granularity 2: unknown\n");
559 seq_printf(seq
, "model number: %s\n", battery
->device_name
);
560 seq_printf(seq
, "serial number: %i\n",
561 battery
->serial_number
);
562 seq_printf(seq
, "battery type: %s\n",
563 battery
->device_chemistry
);
564 seq_printf(seq
, "OEM info: %s\n",
565 battery
->manufacturer_name
);
567 mutex_unlock(&sbs
->lock
);
571 static int acpi_battery_info_open_fs(struct inode
*inode
, struct file
*file
)
573 return single_open(file
, acpi_battery_read_info
, PDE(inode
)->data
);
576 static int acpi_battery_read_state(struct seq_file
*seq
, void *offset
)
578 struct acpi_battery
*battery
= seq
->private;
579 struct acpi_sbs
*sbs
= battery
->sbs
;
582 mutex_lock(&sbs
->lock
);
583 seq_printf(seq
, "present: %s\n",
584 (battery
->present
) ? "yes" : "no");
585 if (!battery
->present
)
588 acpi_battery_get_state(battery
);
589 seq_printf(seq
, "capacity state: %s\n",
590 (battery
->state
& 0x0010) ? "critical" : "ok");
591 seq_printf(seq
, "charging state: %s\n",
592 (battery
->current_now
< 0) ? "discharging" :
593 ((battery
->current_now
> 0) ? "charging" : "charged"));
594 rate
= abs(battery
->current_now
) * acpi_battery_ipscale(battery
);
595 rate
*= (acpi_battery_mode(battery
))?(battery
->voltage_now
*
596 acpi_battery_vscale(battery
)/1000):1;
597 seq_printf(seq
, "present rate: %d%s\n", rate
,
598 acpi_battery_units(battery
));
599 seq_printf(seq
, "remaining capacity: %i%sh\n",
600 battery
->capacity_now
* acpi_battery_scale(battery
),
601 acpi_battery_units(battery
));
602 seq_printf(seq
, "present voltage: %i mV\n",
603 battery
->voltage_now
* acpi_battery_vscale(battery
));
606 mutex_unlock(&sbs
->lock
);
610 static int acpi_battery_state_open_fs(struct inode
*inode
, struct file
*file
)
612 return single_open(file
, acpi_battery_read_state
, PDE(inode
)->data
);
615 static int acpi_battery_read_alarm(struct seq_file
*seq
, void *offset
)
617 struct acpi_battery
*battery
= seq
->private;
618 struct acpi_sbs
*sbs
= battery
->sbs
;
621 mutex_lock(&sbs
->lock
);
623 if (!battery
->present
) {
624 seq_printf(seq
, "present: no\n");
628 acpi_battery_get_alarm(battery
);
629 seq_printf(seq
, "alarm: ");
630 if (battery
->alarm_capacity
)
631 seq_printf(seq
, "%i%sh\n",
632 battery
->alarm_capacity
*
633 acpi_battery_scale(battery
),
634 acpi_battery_units(battery
));
636 seq_printf(seq
, "disabled\n");
638 mutex_unlock(&sbs
->lock
);
643 acpi_battery_write_alarm(struct file
*file
, const char __user
* buffer
,
644 size_t count
, loff_t
* ppos
)
646 struct seq_file
*seq
= file
->private_data
;
647 struct acpi_battery
*battery
= seq
->private;
648 struct acpi_sbs
*sbs
= battery
->sbs
;
649 char alarm_string
[12] = { '\0' };
651 mutex_lock(&sbs
->lock
);
652 if (!battery
->present
) {
656 if (count
> sizeof(alarm_string
) - 1) {
660 if (copy_from_user(alarm_string
, buffer
, count
)) {
664 alarm_string
[count
] = 0;
665 battery
->alarm_capacity
= simple_strtoul(alarm_string
, NULL
, 0) /
666 acpi_battery_scale(battery
);
667 acpi_battery_set_alarm(battery
);
669 mutex_unlock(&sbs
->lock
);
675 static int acpi_battery_alarm_open_fs(struct inode
*inode
, struct file
*file
)
677 return single_open(file
, acpi_battery_read_alarm
, PDE(inode
)->data
);
680 static const struct file_operations acpi_battery_info_fops
= {
681 .open
= acpi_battery_info_open_fs
,
684 .release
= single_release
,
685 .owner
= THIS_MODULE
,
688 static const struct file_operations acpi_battery_state_fops
= {
689 .open
= acpi_battery_state_open_fs
,
692 .release
= single_release
,
693 .owner
= THIS_MODULE
,
696 static const struct file_operations acpi_battery_alarm_fops
= {
697 .open
= acpi_battery_alarm_open_fs
,
699 .write
= acpi_battery_write_alarm
,
701 .release
= single_release
,
702 .owner
= THIS_MODULE
,
705 /* Legacy AC Adapter Interface */
707 static struct proc_dir_entry
*acpi_ac_dir
= NULL
;
709 static int acpi_ac_read_state(struct seq_file
*seq
, void *offset
)
712 struct acpi_sbs
*sbs
= seq
->private;
714 mutex_lock(&sbs
->lock
);
716 seq_printf(seq
, "state: %s\n",
717 sbs
->charger_present
? "on-line" : "off-line");
719 mutex_unlock(&sbs
->lock
);
723 static int acpi_ac_state_open_fs(struct inode
*inode
, struct file
*file
)
725 return single_open(file
, acpi_ac_read_state
, PDE(inode
)->data
);
728 static const struct file_operations acpi_ac_state_fops
= {
729 .open
= acpi_ac_state_open_fs
,
732 .release
= single_release
,
733 .owner
= THIS_MODULE
,
738 /* --------------------------------------------------------------------------
740 -------------------------------------------------------------------------- */
741 static int acpi_battery_read(struct acpi_battery
*battery
)
743 int result
= 0, saved_present
= battery
->present
;
746 if (battery
->sbs
->manager_present
) {
747 result
= acpi_smbus_read(battery
->sbs
->hc
, SMBUS_READ_WORD
,
748 ACPI_SBS_MANAGER
, 0x01, (u8
*)&state
);
750 battery
->present
= state
& (1 << battery
->id
);
752 state
|= 1 << (battery
->id
+ 12);
753 acpi_smbus_write(battery
->sbs
->hc
, SMBUS_WRITE_WORD
,
754 ACPI_SBS_MANAGER
, 0x01, (u8
*)&state
, 2);
755 } else if (battery
->id
== 0)
756 battery
->present
= 1;
757 if (result
|| !battery
->present
)
760 if (saved_present
!= battery
->present
) {
761 battery
->update_time
= 0;
762 result
= acpi_battery_get_info(battery
);
766 result
= acpi_battery_get_state(battery
);
771 static int acpi_battery_add(struct acpi_sbs
*sbs
, int id
)
773 struct acpi_battery
*battery
= &sbs
->battery
[id
];
778 result
= acpi_battery_read(battery
);
782 sprintf(battery
->name
, ACPI_BATTERY_DIR_NAME
, id
);
783 #ifdef CONFIG_ACPI_PROCFS_POWER
784 acpi_sbs_add_fs(&battery
->proc_entry
, acpi_battery_dir
,
785 battery
->name
, &acpi_battery_info_fops
,
786 &acpi_battery_state_fops
, &acpi_battery_alarm_fops
,
789 #ifdef CONFIG_ACPI_SYSFS_POWER
790 battery
->bat
.name
= battery
->name
;
791 battery
->bat
.type
= POWER_SUPPLY_TYPE_BATTERY
;
792 if (!acpi_battery_mode(battery
)) {
793 battery
->bat
.properties
= sbs_charge_battery_props
;
794 battery
->bat
.num_properties
=
795 ARRAY_SIZE(sbs_charge_battery_props
);
797 battery
->bat
.properties
= sbs_energy_battery_props
;
798 battery
->bat
.num_properties
=
799 ARRAY_SIZE(sbs_energy_battery_props
);
801 battery
->bat
.get_property
= acpi_sbs_battery_get_property
;
802 result
= power_supply_register(&sbs
->device
->dev
, &battery
->bat
);
805 result
= device_create_file(battery
->bat
.dev
, &alarm_attr
);
808 battery
->have_sysfs_alarm
= 1;
811 printk(KERN_INFO PREFIX
"%s [%s]: Battery Slot [%s] (battery %s)\n",
812 ACPI_SBS_DEVICE_NAME
, acpi_device_bid(sbs
->device
),
813 battery
->name
, battery
->present
? "present" : "absent");
817 static void acpi_battery_remove(struct acpi_sbs
*sbs
, int id
)
819 struct acpi_battery
*battery
= &sbs
->battery
[id
];
820 #ifdef CONFIG_ACPI_SYSFS_POWER
821 if (battery
->bat
.dev
) {
822 if (battery
->have_sysfs_alarm
)
823 device_remove_file(battery
->bat
.dev
, &alarm_attr
);
824 power_supply_unregister(&battery
->bat
);
827 #ifdef CONFIG_ACPI_PROCFS_POWER
828 if (battery
->proc_entry
)
829 acpi_sbs_remove_fs(&battery
->proc_entry
, acpi_battery_dir
);
833 static int acpi_charger_add(struct acpi_sbs
*sbs
)
837 result
= acpi_ac_get_present(sbs
);
840 #ifdef CONFIG_ACPI_PROCFS_POWER
841 result
= acpi_sbs_add_fs(&sbs
->charger_entry
, acpi_ac_dir
,
842 ACPI_AC_DIR_NAME
, NULL
,
843 &acpi_ac_state_fops
, NULL
, sbs
);
847 #ifdef CONFIG_ACPI_SYSFS_POWER
848 sbs
->charger
.name
= "sbs-charger";
849 sbs
->charger
.type
= POWER_SUPPLY_TYPE_MAINS
;
850 sbs
->charger
.properties
= sbs_ac_props
;
851 sbs
->charger
.num_properties
= ARRAY_SIZE(sbs_ac_props
);
852 sbs
->charger
.get_property
= sbs_get_ac_property
;
853 power_supply_register(&sbs
->device
->dev
, &sbs
->charger
);
855 printk(KERN_INFO PREFIX
"%s [%s]: AC Adapter [%s] (%s)\n",
856 ACPI_SBS_DEVICE_NAME
, acpi_device_bid(sbs
->device
),
857 ACPI_AC_DIR_NAME
, sbs
->charger_present
? "on-line" : "off-line");
862 static void acpi_charger_remove(struct acpi_sbs
*sbs
)
864 #ifdef CONFIG_ACPI_SYSFS_POWER
865 if (sbs
->charger
.dev
)
866 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 static 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 #ifdef CONFIG_ACPI_SYSFS_POWER
889 kobject_uevent(&sbs
->charger
.dev
->kobj
, KOBJ_CHANGE
);
892 if (sbs
->manager_present
) {
893 for (id
= 0; id
< MAX_SBS_BAT
; ++id
) {
894 if (!(sbs
->batteries_supported
& (1 << id
)))
896 bat
= &sbs
->battery
[id
];
897 saved_battery_state
= bat
->present
;
898 acpi_battery_read(bat
);
899 if (saved_battery_state
== bat
->present
)
901 #ifdef CONFIG_ACPI_PROC_EVENT
902 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS
,
904 ACPI_SBS_NOTIFY_STATUS
,
907 #ifdef CONFIG_ACPI_SYSFS_POWER
908 kobject_uevent(&bat
->bat
.dev
->kobj
, KOBJ_CHANGE
);
914 static int acpi_sbs_remove(struct acpi_device
*device
, int type
);
916 static int acpi_sbs_add(struct acpi_device
*device
)
918 struct acpi_sbs
*sbs
;
922 sbs
= kzalloc(sizeof(struct acpi_sbs
), GFP_KERNEL
);
928 mutex_init(&sbs
->lock
);
930 sbs
->hc
= acpi_driver_data(device
->parent
);
931 sbs
->device
= device
;
932 strcpy(acpi_device_name(device
), ACPI_SBS_DEVICE_NAME
);
933 strcpy(acpi_device_class(device
), ACPI_SBS_CLASS
);
934 device
->driver_data
= sbs
;
936 result
= acpi_charger_add(sbs
);
940 result
= acpi_manager_get_info(sbs
);
942 sbs
->manager_present
= 1;
943 for (id
= 0; id
< MAX_SBS_BAT
; ++id
)
944 if ((sbs
->batteries_supported
& (1 << id
)))
945 acpi_battery_add(sbs
, id
);
947 acpi_battery_add(sbs
, 0);
948 acpi_smbus_register_callback(sbs
->hc
, acpi_sbs_callback
, sbs
);
951 acpi_sbs_remove(device
, 0);
955 static int acpi_sbs_remove(struct acpi_device
*device
, int type
)
957 struct acpi_sbs
*sbs
;
962 sbs
= acpi_driver_data(device
);
965 mutex_lock(&sbs
->lock
);
966 acpi_smbus_unregister_callback(sbs
->hc
);
967 for (id
= 0; id
< MAX_SBS_BAT
; ++id
)
968 acpi_battery_remove(sbs
, id
);
969 acpi_charger_remove(sbs
);
970 mutex_unlock(&sbs
->lock
);
971 mutex_destroy(&sbs
->lock
);
976 static void acpi_sbs_rmdirs(void)
978 #ifdef CONFIG_ACPI_PROCFS_POWER
980 acpi_unlock_ac_dir(acpi_ac_dir
);
983 if (acpi_battery_dir
) {
984 acpi_unlock_battery_dir(acpi_battery_dir
);
985 acpi_battery_dir
= NULL
;
990 static int acpi_sbs_resume(struct acpi_device
*device
)
992 struct acpi_sbs
*sbs
;
995 sbs
= device
->driver_data
;
996 acpi_sbs_callback(sbs
);
1000 static struct acpi_driver acpi_sbs_driver
= {
1002 .class = ACPI_SBS_CLASS
,
1003 .ids
= sbs_device_ids
,
1005 .add
= acpi_sbs_add
,
1006 .remove
= acpi_sbs_remove
,
1007 .resume
= acpi_sbs_resume
,
1011 static int __init
acpi_sbs_init(void)
1017 #ifdef CONFIG_ACPI_PROCFS_POWER
1018 acpi_ac_dir
= acpi_lock_ac_dir();
1021 acpi_battery_dir
= acpi_lock_battery_dir();
1022 if (!acpi_battery_dir
) {
1027 result
= acpi_bus_register_driver(&acpi_sbs_driver
);
1035 static void __exit
acpi_sbs_exit(void)
1037 acpi_bus_unregister_driver(&acpi_sbs_driver
);
1042 module_init(acpi_sbs_init
);
1043 module_exit(acpi_sbs_exit
);