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 enum acpi_sbs_device_addr
{
58 ACPI_SBS_CHARGER
= 0x9,
59 ACPI_SBS_MANAGER
= 0xa,
60 ACPI_SBS_BATTERY
= 0xb,
63 #define ACPI_SBS_NOTIFY_STATUS 0x80
64 #define ACPI_SBS_NOTIFY_INFO 0x81
66 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
67 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
68 MODULE_LICENSE("GPL");
70 static unsigned int cache_time
= 1000;
71 module_param(cache_time
, uint
, 0644);
72 MODULE_PARM_DESC(cache_time
, "cache time in milliseconds");
74 extern struct proc_dir_entry
*acpi_lock_ac_dir(void);
75 extern struct proc_dir_entry
*acpi_lock_battery_dir(void);
76 extern void acpi_unlock_ac_dir(struct proc_dir_entry
*acpi_ac_dir
);
77 extern void acpi_unlock_battery_dir(struct proc_dir_entry
*acpi_battery_dir
);
80 #define ACPI_SBS_BLOCK_MAX 32
82 static const struct acpi_device_id sbs_device_ids
[] = {
86 MODULE_DEVICE_TABLE(acpi
, sbs_device_ids
);
89 struct power_supply bat
;
91 #ifdef CONFIG_ACPI_PROCFS_POWER
92 struct proc_dir_entry
*proc_entry
;
94 unsigned long update_time
;
96 char manufacturer_name
[ACPI_SBS_BLOCK_MAX
];
97 char device_name
[ACPI_SBS_BLOCK_MAX
];
98 char device_chemistry
[ACPI_SBS_BLOCK_MAX
];
100 u16 full_charge_capacity
;
116 u8 have_sysfs_alarm
:1;
119 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
122 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 static int sbs_get_ac_property(struct power_supply
*psy
,
167 enum power_supply_property psp
,
168 union power_supply_propval
*val
)
170 struct acpi_sbs
*sbs
= to_acpi_sbs(psy
);
172 case POWER_SUPPLY_PROP_ONLINE
:
173 val
->intval
= sbs
->charger_present
;
181 static int acpi_battery_technology(struct acpi_battery
*battery
)
183 if (!strcasecmp("NiCd", battery
->device_chemistry
))
184 return POWER_SUPPLY_TECHNOLOGY_NiCd
;
185 if (!strcasecmp("NiMH", battery
->device_chemistry
))
186 return POWER_SUPPLY_TECHNOLOGY_NiMH
;
187 if (!strcasecmp("LION", battery
->device_chemistry
))
188 return POWER_SUPPLY_TECHNOLOGY_LION
;
189 if (!strcasecmp("LiP", battery
->device_chemistry
))
190 return POWER_SUPPLY_TECHNOLOGY_LIPO
;
191 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN
;
194 static int acpi_sbs_battery_get_property(struct power_supply
*psy
,
195 enum power_supply_property psp
,
196 union power_supply_propval
*val
)
198 struct acpi_battery
*battery
= to_acpi_battery(psy
);
200 if ((!battery
->present
) && psp
!= POWER_SUPPLY_PROP_PRESENT
)
203 case POWER_SUPPLY_PROP_STATUS
:
204 if (battery
->current_now
< 0)
205 val
->intval
= POWER_SUPPLY_STATUS_DISCHARGING
;
206 else if (battery
->current_now
> 0)
207 val
->intval
= POWER_SUPPLY_STATUS_CHARGING
;
209 val
->intval
= POWER_SUPPLY_STATUS_FULL
;
211 case POWER_SUPPLY_PROP_PRESENT
:
212 val
->intval
= battery
->present
;
214 case POWER_SUPPLY_PROP_TECHNOLOGY
:
215 val
->intval
= acpi_battery_technology(battery
);
217 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
:
218 val
->intval
= battery
->design_voltage
*
219 acpi_battery_vscale(battery
) * 1000;
221 case POWER_SUPPLY_PROP_VOLTAGE_NOW
:
222 val
->intval
= battery
->voltage_now
*
223 acpi_battery_vscale(battery
) * 1000;
225 case POWER_SUPPLY_PROP_CURRENT_NOW
:
226 val
->intval
= abs(battery
->current_now
) *
227 acpi_battery_ipscale(battery
) * 1000;
229 case POWER_SUPPLY_PROP_CURRENT_AVG
:
230 val
->intval
= abs(battery
->current_avg
) *
231 acpi_battery_ipscale(battery
) * 1000;
233 case POWER_SUPPLY_PROP_CAPACITY
:
234 val
->intval
= battery
->state_of_charge
;
236 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
:
237 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
:
238 val
->intval
= battery
->design_capacity
*
239 acpi_battery_scale(battery
) * 1000;
241 case POWER_SUPPLY_PROP_CHARGE_FULL
:
242 case POWER_SUPPLY_PROP_ENERGY_FULL
:
243 val
->intval
= battery
->full_charge_capacity
*
244 acpi_battery_scale(battery
) * 1000;
246 case POWER_SUPPLY_PROP_CHARGE_NOW
:
247 case POWER_SUPPLY_PROP_ENERGY_NOW
:
248 val
->intval
= battery
->capacity_now
*
249 acpi_battery_scale(battery
) * 1000;
251 case POWER_SUPPLY_PROP_TEMP
:
252 val
->intval
= battery
->temp_now
- 2730; // dK -> dC
254 case POWER_SUPPLY_PROP_MODEL_NAME
:
255 val
->strval
= battery
->device_name
;
257 case POWER_SUPPLY_PROP_MANUFACTURER
:
258 val
->strval
= battery
->manufacturer_name
;
266 static enum power_supply_property sbs_ac_props
[] = {
267 POWER_SUPPLY_PROP_ONLINE
,
270 static enum power_supply_property sbs_charge_battery_props
[] = {
271 POWER_SUPPLY_PROP_STATUS
,
272 POWER_SUPPLY_PROP_PRESENT
,
273 POWER_SUPPLY_PROP_TECHNOLOGY
,
274 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
275 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
276 POWER_SUPPLY_PROP_CURRENT_NOW
,
277 POWER_SUPPLY_PROP_CURRENT_AVG
,
278 POWER_SUPPLY_PROP_CAPACITY
,
279 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
,
280 POWER_SUPPLY_PROP_CHARGE_FULL
,
281 POWER_SUPPLY_PROP_CHARGE_NOW
,
282 POWER_SUPPLY_PROP_TEMP
,
283 POWER_SUPPLY_PROP_MODEL_NAME
,
284 POWER_SUPPLY_PROP_MANUFACTURER
,
287 static enum power_supply_property sbs_energy_battery_props
[] = {
288 POWER_SUPPLY_PROP_STATUS
,
289 POWER_SUPPLY_PROP_PRESENT
,
290 POWER_SUPPLY_PROP_TECHNOLOGY
,
291 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
292 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
293 POWER_SUPPLY_PROP_CURRENT_NOW
,
294 POWER_SUPPLY_PROP_CURRENT_AVG
,
295 POWER_SUPPLY_PROP_CAPACITY
,
296 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
,
297 POWER_SUPPLY_PROP_ENERGY_FULL
,
298 POWER_SUPPLY_PROP_ENERGY_NOW
,
299 POWER_SUPPLY_PROP_TEMP
,
300 POWER_SUPPLY_PROP_MODEL_NAME
,
301 POWER_SUPPLY_PROP_MANUFACTURER
,
304 /* --------------------------------------------------------------------------
305 Smart Battery System Management
306 -------------------------------------------------------------------------- */
308 struct acpi_battery_reader
{
309 u8 command
; /* command for battery */
310 u8 mode
; /* word or block? */
311 size_t offset
; /* offset inside struct acpi_sbs_battery */
314 static struct acpi_battery_reader info_readers
[] = {
315 {0x01, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, alarm_capacity
)},
316 {0x03, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, mode
)},
317 {0x10, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, full_charge_capacity
)},
318 {0x17, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, cycle_count
)},
319 {0x18, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, design_capacity
)},
320 {0x19, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, design_voltage
)},
321 {0x1a, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, spec
)},
322 {0x1c, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, serial_number
)},
323 {0x20, SMBUS_READ_BLOCK
, offsetof(struct acpi_battery
, manufacturer_name
)},
324 {0x21, SMBUS_READ_BLOCK
, offsetof(struct acpi_battery
, device_name
)},
325 {0x22, SMBUS_READ_BLOCK
, offsetof(struct acpi_battery
, device_chemistry
)},
328 static struct acpi_battery_reader state_readers
[] = {
329 {0x08, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, temp_now
)},
330 {0x09, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, voltage_now
)},
331 {0x0a, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, current_now
)},
332 {0x0b, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, current_avg
)},
333 {0x0f, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, capacity_now
)},
334 {0x0e, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, state_of_charge
)},
335 {0x16, SMBUS_READ_WORD
, offsetof(struct acpi_battery
, state
)},
338 static int acpi_manager_get_info(struct acpi_sbs
*sbs
)
341 u16 battery_system_info
;
343 result
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_MANAGER
,
344 0x04, (u8
*)&battery_system_info
);
346 sbs
->batteries_supported
= battery_system_info
& 0x000f;
350 static int acpi_battery_get_info(struct acpi_battery
*battery
)
354 for (i
= 0; i
< ARRAY_SIZE(info_readers
); ++i
) {
355 result
= acpi_smbus_read(battery
->sbs
->hc
,
356 info_readers
[i
].mode
,
358 info_readers
[i
].command
,
360 info_readers
[i
].offset
);
367 static int acpi_battery_get_state(struct acpi_battery
*battery
)
371 if (battery
->update_time
&&
372 time_before(jiffies
, battery
->update_time
+
373 msecs_to_jiffies(cache_time
)))
375 for (i
= 0; i
< ARRAY_SIZE(state_readers
); ++i
) {
376 result
= acpi_smbus_read(battery
->sbs
->hc
,
377 state_readers
[i
].mode
,
379 state_readers
[i
].command
,
381 state_readers
[i
].offset
);
386 battery
->update_time
= jiffies
;
390 static int acpi_battery_get_alarm(struct acpi_battery
*battery
)
392 return acpi_smbus_read(battery
->sbs
->hc
, SMBUS_READ_WORD
,
393 ACPI_SBS_BATTERY
, 0x01,
394 (u8
*)&battery
->alarm_capacity
);
397 static int acpi_battery_set_alarm(struct acpi_battery
*battery
)
399 struct acpi_sbs
*sbs
= battery
->sbs
;
400 u16 value
, sel
= 1 << (battery
->id
+ 12);
405 if (sbs
->manager_present
) {
406 ret
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_MANAGER
,
410 if ((value
& 0xf000) != sel
) {
413 ret
= acpi_smbus_write(sbs
->hc
, SMBUS_WRITE_WORD
,
415 0x01, (u8
*)&value
, 2);
420 ret
= acpi_smbus_write(sbs
->hc
, SMBUS_WRITE_WORD
, ACPI_SBS_BATTERY
,
421 0x01, (u8
*)&battery
->alarm_capacity
, 2);
426 static int acpi_ac_get_present(struct acpi_sbs
*sbs
)
431 result
= acpi_smbus_read(sbs
->hc
, SMBUS_READ_WORD
, ACPI_SBS_CHARGER
,
432 0x13, (u8
*) & status
);
434 sbs
->charger_present
= (status
>> 15) & 0x1;
438 static ssize_t
acpi_battery_alarm_show(struct device
*dev
,
439 struct device_attribute
*attr
,
442 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
443 acpi_battery_get_alarm(battery
);
444 return sprintf(buf
, "%d\n", battery
->alarm_capacity
*
445 acpi_battery_scale(battery
) * 1000);
448 static ssize_t
acpi_battery_alarm_store(struct device
*dev
,
449 struct device_attribute
*attr
,
450 const char *buf
, size_t count
)
453 struct acpi_battery
*battery
= to_acpi_battery(dev_get_drvdata(dev
));
454 if (sscanf(buf
, "%ld\n", &x
) == 1)
455 battery
->alarm_capacity
= x
/
456 (1000 * acpi_battery_scale(battery
));
457 if (battery
->present
)
458 acpi_battery_set_alarm(battery
);
462 static struct device_attribute alarm_attr
= {
463 .attr
= {.name
= "alarm", .mode
= 0644, .owner
= THIS_MODULE
},
464 .show
= acpi_battery_alarm_show
,
465 .store
= acpi_battery_alarm_store
,
468 /* --------------------------------------------------------------------------
469 FS Interface (/proc/acpi)
470 -------------------------------------------------------------------------- */
472 #ifdef CONFIG_ACPI_PROCFS_POWER
473 /* Generic Routines */
475 acpi_sbs_add_fs(struct proc_dir_entry
**dir
,
476 struct proc_dir_entry
*parent_dir
,
478 struct file_operations
*info_fops
,
479 struct file_operations
*state_fops
,
480 struct file_operations
*alarm_fops
, void *data
)
482 struct proc_dir_entry
*entry
= NULL
;
485 *dir
= proc_mkdir(dir_name
, parent_dir
);
489 (*dir
)->owner
= THIS_MODULE
;
494 entry
= create_proc_entry(ACPI_SBS_FILE_INFO
, S_IRUGO
, *dir
);
496 entry
->proc_fops
= info_fops
;
498 entry
->owner
= THIS_MODULE
;
504 entry
= create_proc_entry(ACPI_SBS_FILE_STATE
, S_IRUGO
, *dir
);
506 entry
->proc_fops
= state_fops
;
508 entry
->owner
= THIS_MODULE
;
514 entry
= create_proc_entry(ACPI_SBS_FILE_ALARM
, S_IRUGO
, *dir
);
516 entry
->proc_fops
= alarm_fops
;
518 entry
->owner
= THIS_MODULE
;
525 acpi_sbs_remove_fs(struct proc_dir_entry
**dir
,
526 struct proc_dir_entry
*parent_dir
)
529 remove_proc_entry(ACPI_SBS_FILE_INFO
, *dir
);
530 remove_proc_entry(ACPI_SBS_FILE_STATE
, *dir
);
531 remove_proc_entry(ACPI_SBS_FILE_ALARM
, *dir
);
532 remove_proc_entry((*dir
)->name
, parent_dir
);
537 /* Smart Battery Interface */
538 static struct proc_dir_entry
*acpi_battery_dir
= NULL
;
540 static inline char *acpi_battery_units(struct acpi_battery
*battery
)
542 return acpi_battery_mode(battery
) ? " mWh" : " mAh";
546 static int acpi_battery_read_info(struct seq_file
*seq
, void *offset
)
548 struct acpi_battery
*battery
= seq
->private;
549 struct acpi_sbs
*sbs
= battery
->sbs
;
552 mutex_lock(&sbs
->lock
);
554 seq_printf(seq
, "present: %s\n",
555 (battery
->present
) ? "yes" : "no");
556 if (!battery
->present
)
559 seq_printf(seq
, "design capacity: %i%s\n",
560 battery
->design_capacity
* acpi_battery_scale(battery
),
561 acpi_battery_units(battery
));
562 seq_printf(seq
, "last full capacity: %i%s\n",
563 battery
->full_charge_capacity
* acpi_battery_scale(battery
),
564 acpi_battery_units(battery
));
565 seq_printf(seq
, "battery technology: rechargeable\n");
566 seq_printf(seq
, "design voltage: %i mV\n",
567 battery
->design_voltage
* acpi_battery_vscale(battery
));
568 seq_printf(seq
, "design capacity warning: unknown\n");
569 seq_printf(seq
, "design capacity low: unknown\n");
570 seq_printf(seq
, "capacity granularity 1: unknown\n");
571 seq_printf(seq
, "capacity granularity 2: unknown\n");
572 seq_printf(seq
, "model number: %s\n", battery
->device_name
);
573 seq_printf(seq
, "serial number: %i\n",
574 battery
->serial_number
);
575 seq_printf(seq
, "battery type: %s\n",
576 battery
->device_chemistry
);
577 seq_printf(seq
, "OEM info: %s\n",
578 battery
->manufacturer_name
);
580 mutex_unlock(&sbs
->lock
);
584 static int acpi_battery_info_open_fs(struct inode
*inode
, struct file
*file
)
586 return single_open(file
, acpi_battery_read_info
, PDE(inode
)->data
);
589 static int acpi_battery_read_state(struct seq_file
*seq
, void *offset
)
591 struct acpi_battery
*battery
= seq
->private;
592 struct acpi_sbs
*sbs
= battery
->sbs
;
595 mutex_lock(&sbs
->lock
);
596 seq_printf(seq
, "present: %s\n",
597 (battery
->present
) ? "yes" : "no");
598 if (!battery
->present
)
601 acpi_battery_get_state(battery
);
602 seq_printf(seq
, "capacity state: %s\n",
603 (battery
->state
& 0x0010) ? "critical" : "ok");
604 seq_printf(seq
, "charging state: %s\n",
605 (battery
->current_now
< 0) ? "discharging" :
606 ((battery
->current_now
> 0) ? "charging" : "charged"));
607 seq_printf(seq
, "present rate: %d mA\n",
608 abs(battery
->current_now
) * acpi_battery_ipscale(battery
));
609 seq_printf(seq
, "remaining capacity: %i%s\n",
610 battery
->capacity_now
* acpi_battery_scale(battery
),
611 acpi_battery_units(battery
));
612 seq_printf(seq
, "present voltage: %i mV\n",
613 battery
->voltage_now
* acpi_battery_vscale(battery
));
616 mutex_unlock(&sbs
->lock
);
620 static int acpi_battery_state_open_fs(struct inode
*inode
, struct file
*file
)
622 return single_open(file
, acpi_battery_read_state
, PDE(inode
)->data
);
625 static int acpi_battery_read_alarm(struct seq_file
*seq
, void *offset
)
627 struct acpi_battery
*battery
= seq
->private;
628 struct acpi_sbs
*sbs
= battery
->sbs
;
631 mutex_lock(&sbs
->lock
);
633 if (!battery
->present
) {
634 seq_printf(seq
, "present: no\n");
638 acpi_battery_get_alarm(battery
);
639 seq_printf(seq
, "alarm: ");
640 if (battery
->alarm_capacity
)
641 seq_printf(seq
, "%i%s\n",
642 battery
->alarm_capacity
*
643 acpi_battery_scale(battery
),
644 acpi_battery_units(battery
));
646 seq_printf(seq
, "disabled\n");
648 mutex_unlock(&sbs
->lock
);
653 acpi_battery_write_alarm(struct file
*file
, const char __user
* buffer
,
654 size_t count
, loff_t
* ppos
)
656 struct seq_file
*seq
= file
->private_data
;
657 struct acpi_battery
*battery
= seq
->private;
658 struct acpi_sbs
*sbs
= battery
->sbs
;
659 char alarm_string
[12] = { '\0' };
661 mutex_lock(&sbs
->lock
);
662 if (!battery
->present
) {
666 if (count
> sizeof(alarm_string
) - 1) {
670 if (copy_from_user(alarm_string
, buffer
, count
)) {
674 alarm_string
[count
] = 0;
675 battery
->alarm_capacity
= simple_strtoul(alarm_string
, NULL
, 0) /
676 acpi_battery_scale(battery
);
677 acpi_battery_set_alarm(battery
);
679 mutex_unlock(&sbs
->lock
);
685 static int acpi_battery_alarm_open_fs(struct inode
*inode
, struct file
*file
)
687 return single_open(file
, acpi_battery_read_alarm
, PDE(inode
)->data
);
690 static struct file_operations acpi_battery_info_fops
= {
691 .open
= acpi_battery_info_open_fs
,
694 .release
= single_release
,
695 .owner
= THIS_MODULE
,
698 static struct file_operations acpi_battery_state_fops
= {
699 .open
= acpi_battery_state_open_fs
,
702 .release
= single_release
,
703 .owner
= THIS_MODULE
,
706 static struct file_operations acpi_battery_alarm_fops
= {
707 .open
= acpi_battery_alarm_open_fs
,
709 .write
= acpi_battery_write_alarm
,
711 .release
= single_release
,
712 .owner
= THIS_MODULE
,
715 /* Legacy AC Adapter Interface */
717 static struct proc_dir_entry
*acpi_ac_dir
= NULL
;
719 static int acpi_ac_read_state(struct seq_file
*seq
, void *offset
)
722 struct acpi_sbs
*sbs
= seq
->private;
724 mutex_lock(&sbs
->lock
);
726 seq_printf(seq
, "state: %s\n",
727 sbs
->charger_present
? "on-line" : "off-line");
729 mutex_unlock(&sbs
->lock
);
733 static int acpi_ac_state_open_fs(struct inode
*inode
, struct file
*file
)
735 return single_open(file
, acpi_ac_read_state
, PDE(inode
)->data
);
738 static struct file_operations acpi_ac_state_fops
= {
739 .open
= acpi_ac_state_open_fs
,
742 .release
= single_release
,
743 .owner
= THIS_MODULE
,
748 /* --------------------------------------------------------------------------
750 -------------------------------------------------------------------------- */
751 static int acpi_battery_read(struct acpi_battery
*battery
)
753 int result
= 0, saved_present
= battery
->present
;
756 if (battery
->sbs
->manager_present
) {
757 result
= acpi_smbus_read(battery
->sbs
->hc
, SMBUS_READ_WORD
,
758 ACPI_SBS_MANAGER
, 0x01, (u8
*)&state
);
760 battery
->present
= state
& (1 << battery
->id
);
762 state
|= 1 << (battery
->id
+ 12);
763 acpi_smbus_write(battery
->sbs
->hc
, SMBUS_WRITE_WORD
,
764 ACPI_SBS_MANAGER
, 0x01, (u8
*)&state
, 2);
765 } else if (battery
->id
== 0)
766 battery
->present
= 1;
767 if (result
|| !battery
->present
)
770 if (saved_present
!= battery
->present
) {
771 battery
->update_time
= 0;
772 result
= acpi_battery_get_info(battery
);
776 result
= acpi_battery_get_state(battery
);
781 static int acpi_battery_add(struct acpi_sbs
*sbs
, int id
)
783 struct acpi_battery
*battery
= &sbs
->battery
[id
];
788 result
= acpi_battery_read(battery
);
792 sprintf(battery
->name
, ACPI_BATTERY_DIR_NAME
, id
);
793 #ifdef CONFIG_ACPI_PROCFS_POWER
794 acpi_sbs_add_fs(&battery
->proc_entry
, acpi_battery_dir
,
795 battery
->name
, &acpi_battery_info_fops
,
796 &acpi_battery_state_fops
, &acpi_battery_alarm_fops
,
799 battery
->bat
.name
= battery
->name
;
800 battery
->bat
.type
= POWER_SUPPLY_TYPE_BATTERY
;
801 if (!acpi_battery_mode(battery
)) {
802 battery
->bat
.properties
= sbs_charge_battery_props
;
803 battery
->bat
.num_properties
=
804 ARRAY_SIZE(sbs_charge_battery_props
);
806 battery
->bat
.properties
= sbs_energy_battery_props
;
807 battery
->bat
.num_properties
=
808 ARRAY_SIZE(sbs_energy_battery_props
);
810 battery
->bat
.get_property
= acpi_sbs_battery_get_property
;
811 result
= power_supply_register(&sbs
->device
->dev
, &battery
->bat
);
814 result
= device_create_file(battery
->bat
.dev
, &alarm_attr
);
817 battery
->have_sysfs_alarm
= 1;
819 printk(KERN_INFO PREFIX
"%s [%s]: Battery Slot [%s] (battery %s)\n",
820 ACPI_SBS_DEVICE_NAME
, acpi_device_bid(sbs
->device
),
821 battery
->name
, sbs
->battery
->present
? "present" : "absent");
825 static void acpi_battery_remove(struct acpi_sbs
*sbs
, int id
)
827 struct acpi_battery
*battery
= &sbs
->battery
[id
];
829 if (battery
->bat
.dev
) {
830 if (battery
->have_sysfs_alarm
)
831 device_remove_file(battery
->bat
.dev
, &alarm_attr
);
832 power_supply_unregister(&battery
->bat
);
834 #ifdef CONFIG_ACPI_PROCFS_POWER
835 if (battery
->proc_entry
)
836 acpi_sbs_remove_fs(&battery
->proc_entry
, acpi_battery_dir
);
840 static int acpi_charger_add(struct acpi_sbs
*sbs
)
844 result
= acpi_ac_get_present(sbs
);
847 #ifdef CONFIG_ACPI_PROCFS_POWER
848 result
= acpi_sbs_add_fs(&sbs
->charger_entry
, acpi_ac_dir
,
849 ACPI_AC_DIR_NAME
, NULL
,
850 &acpi_ac_state_fops
, NULL
, sbs
);
854 sbs
->charger
.name
= "sbs-charger";
855 sbs
->charger
.type
= POWER_SUPPLY_TYPE_MAINS
;
856 sbs
->charger
.properties
= sbs_ac_props
;
857 sbs
->charger
.num_properties
= ARRAY_SIZE(sbs_ac_props
);
858 sbs
->charger
.get_property
= sbs_get_ac_property
;
859 power_supply_register(&sbs
->device
->dev
, &sbs
->charger
);
860 printk(KERN_INFO PREFIX
"%s [%s]: AC Adapter [%s] (%s)\n",
861 ACPI_SBS_DEVICE_NAME
, acpi_device_bid(sbs
->device
),
862 ACPI_AC_DIR_NAME
, sbs
->charger_present
? "on-line" : "off-line");
867 static void acpi_charger_remove(struct acpi_sbs
*sbs
)
869 if (sbs
->charger
.dev
)
870 power_supply_unregister(&sbs
->charger
);
871 #ifdef CONFIG_ACPI_PROCFS_POWER
872 if (sbs
->charger_entry
)
873 acpi_sbs_remove_fs(&sbs
->charger_entry
, acpi_ac_dir
);
877 void acpi_sbs_callback(void *context
)
880 struct acpi_sbs
*sbs
= context
;
881 struct acpi_battery
*bat
;
882 u8 saved_charger_state
= sbs
->charger_present
;
883 u8 saved_battery_state
;
884 acpi_ac_get_present(sbs
);
885 if (sbs
->charger_present
!= saved_charger_state
) {
886 #ifdef CONFIG_ACPI_PROC_EVENT
887 acpi_bus_generate_proc_event4(ACPI_AC_CLASS
, ACPI_AC_DIR_NAME
,
888 ACPI_SBS_NOTIFY_STATUS
,
889 sbs
->charger_present
);
891 kobject_uevent(&sbs
->charger
.dev
->kobj
, KOBJ_CHANGE
);
893 if (sbs
->manager_present
) {
894 for (id
= 0; id
< MAX_SBS_BAT
; ++id
) {
895 if (!(sbs
->batteries_supported
& (1 << id
)))
897 bat
= &sbs
->battery
[id
];
898 saved_battery_state
= bat
->present
;
899 acpi_battery_read(bat
);
900 if (saved_battery_state
== bat
->present
)
902 #ifdef CONFIG_ACPI_PROC_EVENT
903 acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS
,
905 ACPI_SBS_NOTIFY_STATUS
,
908 kobject_uevent(&bat
->bat
.dev
->kobj
, KOBJ_CHANGE
);
913 static int acpi_sbs_remove(struct acpi_device
*device
, int type
);
915 static int acpi_sbs_add(struct acpi_device
*device
)
917 struct acpi_sbs
*sbs
;
921 sbs
= kzalloc(sizeof(struct acpi_sbs
), GFP_KERNEL
);
927 mutex_init(&sbs
->lock
);
929 sbs
->hc
= acpi_driver_data(device
->parent
);
930 sbs
->device
= device
;
931 strcpy(acpi_device_name(device
), ACPI_SBS_DEVICE_NAME
);
932 strcpy(acpi_device_class(device
), ACPI_SBS_CLASS
);
933 acpi_driver_data(device
) = sbs
;
935 result
= acpi_charger_add(sbs
);
939 result
= acpi_manager_get_info(sbs
);
941 sbs
->manager_present
= 1;
942 for (id
= 0; id
< MAX_SBS_BAT
; ++id
)
943 if ((sbs
->batteries_supported
& (1 << id
)))
944 acpi_battery_add(sbs
, id
);
946 acpi_battery_add(sbs
, 0);
947 acpi_smbus_register_callback(sbs
->hc
, acpi_sbs_callback
, sbs
);
950 acpi_sbs_remove(device
, 0);
954 static int acpi_sbs_remove(struct acpi_device
*device
, int type
)
956 struct acpi_sbs
*sbs
;
961 sbs
= acpi_driver_data(device
);
964 mutex_lock(&sbs
->lock
);
965 acpi_smbus_unregister_callback(sbs
->hc
);
966 for (id
= 0; id
< MAX_SBS_BAT
; ++id
)
967 acpi_battery_remove(sbs
, id
);
968 acpi_charger_remove(sbs
);
969 mutex_unlock(&sbs
->lock
);
970 mutex_destroy(&sbs
->lock
);
975 static void acpi_sbs_rmdirs(void)
977 #ifdef CONFIG_ACPI_PROCFS_POWER
979 acpi_unlock_ac_dir(acpi_ac_dir
);
982 if (acpi_battery_dir
) {
983 acpi_unlock_battery_dir(acpi_battery_dir
);
984 acpi_battery_dir
= NULL
;
989 static int acpi_sbs_resume(struct acpi_device
*device
)
991 struct acpi_sbs
*sbs
;
994 sbs
= device
->driver_data
;
995 acpi_sbs_callback(sbs
);
999 static struct acpi_driver acpi_sbs_driver
= {
1001 .class = ACPI_SBS_CLASS
,
1002 .ids
= sbs_device_ids
,
1004 .add
= acpi_sbs_add
,
1005 .remove
= acpi_sbs_remove
,
1006 .resume
= acpi_sbs_resume
,
1010 static int __init
acpi_sbs_init(void)
1016 #ifdef CONFIG_ACPI_PROCFS_POWER
1017 acpi_ac_dir
= acpi_lock_ac_dir();
1020 acpi_battery_dir
= acpi_lock_battery_dir();
1021 if (!acpi_battery_dir
) {
1026 result
= acpi_bus_register_driver(&acpi_sbs_driver
);
1034 static void __exit
acpi_sbs_exit(void)
1036 acpi_bus_unregister_driver(&acpi_sbs_driver
);
1041 module_init(acpi_sbs_init
);
1042 module_exit(acpi_sbs_exit
);