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linux/drivers/acpi/sbs.c

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/*
* acpi_sbs.c - ACPI Smart Battery System Driver ($Revision: 1.16 $)
*
* Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <asm/uaccess.h>
#include <linux/acpi.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
#include <linux/delay.h>
#define ACPI_SBS_COMPONENT 0x00080000
#define ACPI_SBS_CLASS "sbs"
#define ACPI_AC_CLASS "ac_adapter"
#define ACPI_BATTERY_CLASS "battery"
#define ACPI_SBS_DEVICE_NAME "Smart Battery System"
#define ACPI_SBS_FILE_INFO "info"
#define ACPI_SBS_FILE_STATE "state"
#define ACPI_SBS_FILE_ALARM "alarm"
#define ACPI_BATTERY_DIR_NAME "BAT%i"
#define ACPI_AC_DIR_NAME "AC0"
#define ACPI_SBC_SMBUS_ADDR 0x9
#define ACPI_SBSM_SMBUS_ADDR 0xa
#define ACPI_SB_SMBUS_ADDR 0xb
#define ACPI_SBS_AC_NOTIFY_STATUS 0x80
#define ACPI_SBS_BATTERY_NOTIFY_STATUS 0x80
#define ACPI_SBS_BATTERY_NOTIFY_INFO 0x81
#define _COMPONENT ACPI_SBS_COMPONENT
ACPI_MODULE_NAME("sbs");
MODULE_AUTHOR("Rich Townsend");
MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
MODULE_LICENSE("GPL");
#define xmsleep(t) msleep(t)
#define ACPI_EC_SMB_PRTCL 0x00 /* protocol, PEC */
#define ACPI_EC_SMB_STS 0x01 /* status */
#define ACPI_EC_SMB_ADDR 0x02 /* address */
#define ACPI_EC_SMB_CMD 0x03 /* command */
#define ACPI_EC_SMB_DATA 0x04 /* 32 data registers */
#define ACPI_EC_SMB_BCNT 0x24 /* number of data bytes */
#define ACPI_EC_SMB_STS_DONE 0x80
#define ACPI_EC_SMB_STS_STATUS 0x1f
#define ACPI_EC_SMB_PRTCL_WRITE 0x00
#define ACPI_EC_SMB_PRTCL_READ 0x01
#define ACPI_EC_SMB_PRTCL_WORD_DATA 0x08
#define ACPI_EC_SMB_PRTCL_BLOCK_DATA 0x0a
#define ACPI_EC_SMB_TRANSACTION_SLEEP 1
#define ACPI_EC_SMB_ACCESS_SLEEP1 1
#define ACPI_EC_SMB_ACCESS_SLEEP2 10
#define DEF_CAPACITY_UNIT 3
#define MAH_CAPACITY_UNIT 1
#define MWH_CAPACITY_UNIT 2
#define CAPACITY_UNIT DEF_CAPACITY_UNIT
#define REQUEST_UPDATE_MODE 1
#define QUEUE_UPDATE_MODE 2
#define DATA_TYPE_COMMON 0
#define DATA_TYPE_INFO 1
#define DATA_TYPE_STATE 2
#define DATA_TYPE_ALARM 3
#define DATA_TYPE_AC_STATE 4
extern struct proc_dir_entry *acpi_lock_ac_dir(void);
extern struct proc_dir_entry *acpi_lock_battery_dir(void);
extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
#define MAX_SBS_BAT 4
#define ACPI_SBS_BLOCK_MAX 32
#define ACPI_SBS_SMBUS_READ 1
#define ACPI_SBS_SMBUS_WRITE 2
#define ACPI_SBS_WORD_DATA 1
#define ACPI_SBS_BLOCK_DATA 2
#define UPDATE_DELAY 10
/* 0 - every time, > 0 - by update_time */
static unsigned int update_time = 120;
static unsigned int capacity_mode = CAPACITY_UNIT;
module_param(update_time, uint, 0644);
module_param(capacity_mode, uint, 0444);
static int acpi_sbs_add(struct acpi_device *device);
static int acpi_sbs_remove(struct acpi_device *device, int type);
static int acpi_sbs_resume(struct acpi_device *device);
static const struct acpi_device_id sbs_device_ids[] = {
{"ACPI0001", 0},
{"ACPI0005", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
static struct acpi_driver acpi_sbs_driver = {
.name = "sbs",
.class = ACPI_SBS_CLASS,
.ids = sbs_device_ids,
.ops = {
.add = acpi_sbs_add,
.remove = acpi_sbs_remove,
.resume = acpi_sbs_resume,
},
};
struct acpi_ac {
int ac_present;
};
struct acpi_battery_info {
int capacity_mode;
s16 full_charge_capacity;
s16 design_capacity;
s16 design_voltage;
int vscale;
int ipscale;
s16 serial_number;
char manufacturer_name[ACPI_SBS_BLOCK_MAX + 3];
char device_name[ACPI_SBS_BLOCK_MAX + 3];
char device_chemistry[ACPI_SBS_BLOCK_MAX + 3];
};
struct acpi_battery_state {
s16 voltage;
s16 amperage;
s16 remaining_capacity;
s16 battery_state;
};
struct acpi_battery_alarm {
s16 remaining_capacity;
};
struct acpi_battery {
int alive;
int id;
int init_state;
int battery_present;
struct acpi_sbs *sbs;
struct acpi_battery_info info;
struct acpi_battery_state state;
struct acpi_battery_alarm alarm;
struct proc_dir_entry *battery_entry;
};
struct acpi_sbs {
int base;
struct acpi_device *device;
struct mutex mutex;
int sbsm_present;
int sbsm_batteries_supported;
struct proc_dir_entry *ac_entry;
struct acpi_ac ac;
struct acpi_battery battery[MAX_SBS_BAT];
int zombie;
struct timer_list update_timer;
int run_cnt;
int update_proc_flg;
};
static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type);
static void acpi_sbs_update_time(void *data);
union sbs_rw_data {
u16 word;
u8 block[ACPI_SBS_BLOCK_MAX + 2];
};
static int acpi_ec_sbs_access(struct acpi_sbs *sbs, u16 addr,
char read_write, u8 command, int size,
union sbs_rw_data *data);
/* --------------------------------------------------------------------------
SMBus Communication
-------------------------------------------------------------------------- */
static int acpi_ec_sbs_read(struct acpi_sbs *sbs, u8 address, u8 * data)
{
u8 val;
int err;
err = ec_read(sbs->base + address, &val);
if (!err) {
*data = val;
}
xmsleep(ACPI_EC_SMB_TRANSACTION_SLEEP);
return (err);
}
static int acpi_ec_sbs_write(struct acpi_sbs *sbs, u8 address, u8 data)
{
int err;
err = ec_write(sbs->base + address, data);
return (err);
}
static int
acpi_ec_sbs_access(struct acpi_sbs *sbs, u16 addr,
char read_write, u8 command, int size,
union sbs_rw_data *data)
{
unsigned char protocol, len = 0, temp[2] = { 0, 0 };
int i;
if (read_write == ACPI_SBS_SMBUS_READ) {
protocol = ACPI_EC_SMB_PRTCL_READ;
} else {
protocol = ACPI_EC_SMB_PRTCL_WRITE;
}
switch (size) {
case ACPI_SBS_WORD_DATA:
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_CMD, command);
if (read_write == ACPI_SBS_SMBUS_WRITE) {
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA, data->word);
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA + 1,
data->word >> 8);
}
protocol |= ACPI_EC_SMB_PRTCL_WORD_DATA;
break;
case ACPI_SBS_BLOCK_DATA:
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_CMD, command);
if (read_write == ACPI_SBS_SMBUS_WRITE) {
len = min_t(u8, data->block[0], 32);
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_BCNT, len);
for (i = 0; i < len; i++)
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA + i,
data->block[i + 1]);
}
protocol |= ACPI_EC_SMB_PRTCL_BLOCK_DATA;
break;
default:
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"unsupported transaction %d", size));
return (-1);
}
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_ADDR, addr << 1);
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_PRTCL, protocol);
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
if (~temp[0] & ACPI_EC_SMB_STS_DONE) {
xmsleep(ACPI_EC_SMB_ACCESS_SLEEP1);
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
}
if (~temp[0] & ACPI_EC_SMB_STS_DONE) {
xmsleep(ACPI_EC_SMB_ACCESS_SLEEP2);
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
}
if ((~temp[0] & ACPI_EC_SMB_STS_DONE)
|| (temp[0] & ACPI_EC_SMB_STS_STATUS)) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"transaction %d error", size));
return (-1);
}
if (read_write == ACPI_SBS_SMBUS_WRITE) {
return (0);
}
switch (size) {
case ACPI_SBS_WORD_DATA:
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA, temp);
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA + 1, temp + 1);
data->word = (temp[1] << 8) | temp[0];
break;
case ACPI_SBS_BLOCK_DATA:
len = 0;
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_BCNT, &len);
len = min_t(u8, len, 32);
for (i = 0; i < len; i++)
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA + i,
data->block + i + 1);
data->block[0] = len;
break;
default:
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"unsupported transaction %d", size));
return (-1);
}
return (0);
}
static int
acpi_sbs_read_word(struct acpi_sbs *sbs, int addr, int func, u16 * word)
{
union sbs_rw_data data;
int result = 0;
result = acpi_ec_sbs_access(sbs, addr,
ACPI_SBS_SMBUS_READ, func,
ACPI_SBS_WORD_DATA, &data);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_ec_sbs_access() failed"));
} else {
*word = data.word;
}
return result;
}
static int
acpi_sbs_read_str(struct acpi_sbs *sbs, int addr, int func, char *str)
{
union sbs_rw_data data;
int result = 0;
result = acpi_ec_sbs_access(sbs, addr,
ACPI_SBS_SMBUS_READ, func,
ACPI_SBS_BLOCK_DATA, &data);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_ec_sbs_access() failed"));
} else {
strncpy(str, (const char *)data.block + 1, data.block[0]);
str[data.block[0]] = 0;
}
return result;
}
static int
acpi_sbs_write_word(struct acpi_sbs *sbs, int addr, int func, int word)
{
union sbs_rw_data data;
int result = 0;
data.word = word;
result = acpi_ec_sbs_access(sbs, addr,
ACPI_SBS_SMBUS_WRITE, func,
ACPI_SBS_WORD_DATA, &data);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_ec_sbs_access() failed"));
}
return result;
}
static int sbs_zombie(struct acpi_sbs *sbs)
{
return (sbs->zombie);
}
static int sbs_mutex_lock(struct acpi_sbs *sbs)
{
if (sbs_zombie(sbs)) {
return -ENODEV;
}
mutex_lock(&sbs->mutex);
return 0;
}
static void sbs_mutex_unlock(struct acpi_sbs *sbs)
{
mutex_unlock(&sbs->mutex);
}
/* --------------------------------------------------------------------------
Smart Battery System Management
-------------------------------------------------------------------------- */
static int acpi_check_update_proc(struct acpi_sbs *sbs)
{
acpi_status status = AE_OK;
if (update_time == 0) {
sbs->update_proc_flg = 0;
return 0;
}
if (sbs->update_proc_flg == 0) {
status = acpi_os_execute(OSL_GPE_HANDLER,
acpi_sbs_update_time, sbs);
if (status != AE_OK) {
ACPI_EXCEPTION((AE_INFO, status,
"acpi_os_execute() failed"));
return 1;
}
sbs->update_proc_flg = 1;
}
return 0;
}
static int acpi_sbs_generate_event(struct acpi_device *device,
int event, int state, char *bid, char *class)
{
char bid_saved[5];
char class_saved[20];
int result = 0;
strcpy(bid_saved, acpi_device_bid(device));
strcpy(class_saved, acpi_device_class(device));
strcpy(acpi_device_bid(device), bid);
strcpy(acpi_device_class(device), class);
result = acpi_bus_generate_proc_event(device, event, state);
strcpy(acpi_device_bid(device), bid_saved);
strcpy(acpi_device_class(device), class_saved);
acpi_bus_generate_netlink_event(class, bid, event, state);
return result;
}
static int acpi_battery_get_present(struct acpi_battery *battery)
{
s16 state;
int result = 0;
int is_present = 0;
result = acpi_sbs_read_word(battery->sbs,
ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
}
if (!result) {
is_present = (state & 0x000f) & (1 << battery->id);
}
battery->battery_present = is_present;
return result;
}
static int acpi_battery_select(struct acpi_battery *battery)
{
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
s16 state;
int foo;
if (sbs->sbsm_present) {
/* Take special care not to knobble other nibbles of
* state (aka selector_state), since
* it causes charging to halt on SBSELs */
result =
acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
foo = (state & 0x0fff) | (1 << (battery->id + 12));
result =
acpi_sbs_write_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, foo);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_write_word() failed"));
goto end;
}
}
end:
return result;
}
static int acpi_sbsm_get_info(struct acpi_sbs *sbs)
{
int result = 0;
s16 battery_system_info;
result = acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x04,
&battery_system_info);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
sbs->sbsm_present = 1;
sbs->sbsm_batteries_supported = battery_system_info & 0x000f;
end:
return result;
}
static int acpi_battery_get_info(struct acpi_battery *battery)
{
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
s16 battery_mode;
s16 specification_info;
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
&battery_mode);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
battery->info.capacity_mode = (battery_mode & 0x8000) >> 15;
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x10,
&battery->info.full_charge_capacity);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x18,
&battery->info.design_capacity);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x19,
&battery->info.design_voltage);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1a,
&specification_info);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
switch ((specification_info & 0x0f00) >> 8) {
case 1:
battery->info.vscale = 10;
break;
case 2:
battery->info.vscale = 100;
break;
case 3:
battery->info.vscale = 1000;
break;
default:
battery->info.vscale = 1;
}
switch ((specification_info & 0xf000) >> 12) {
case 1:
battery->info.ipscale = 10;
break;
case 2:
battery->info.ipscale = 100;
break;
case 3:
battery->info.ipscale = 1000;
break;
default:
battery->info.ipscale = 1;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1c,
&battery->info.serial_number);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x20,
battery->info.manufacturer_name);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_str() failed"));
goto end;
}
result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x21,
battery->info.device_name);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_str() failed"));
goto end;
}
result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x22,
battery->info.device_chemistry);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_str() failed"));
goto end;
}
end:
return result;
}
static int acpi_battery_get_state(struct acpi_battery *battery)
{
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x09,
&battery->state.voltage);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0a,
&battery->state.amperage);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0f,
&battery->state.remaining_capacity);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x16,
&battery->state.battery_state);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
end:
return result;
}
static int acpi_battery_get_alarm(struct acpi_battery *battery)
{
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
&battery->alarm.remaining_capacity);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
end:
return result;
}
static int acpi_battery_set_alarm(struct acpi_battery *battery,
unsigned long alarm)
{
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
s16 battery_mode;
int foo;
result = acpi_battery_select(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_select() failed"));
goto end;
}
/* If necessary, enable the alarm */
if (alarm > 0) {
result =
acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
&battery_mode);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
result =
acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
battery_mode & 0xbfff);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_write_word() failed"));
goto end;
}
}
foo = alarm / (battery->info.capacity_mode ? 10 : 1);
result = acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01, foo);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_write_word() failed"));
goto end;
}
end:
return result;
}
static int acpi_battery_set_mode(struct acpi_battery *battery)
{
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
s16 battery_mode;
if (capacity_mode == DEF_CAPACITY_UNIT) {
goto end;
}
result = acpi_sbs_read_word(sbs,
ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
if (capacity_mode == MAH_CAPACITY_UNIT) {
battery_mode &= 0x7fff;
} else {
battery_mode |= 0x8000;
}
result = acpi_sbs_write_word(sbs,
ACPI_SB_SMBUS_ADDR, 0x03, battery_mode);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_write_word() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs,
ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
end:
return result;
}
static int acpi_battery_init(struct acpi_battery *battery)
{
int result = 0;
result = acpi_battery_select(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_select() failed"));
goto end;
}
result = acpi_battery_set_mode(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_set_mode() failed"));
goto end;
}
result = acpi_battery_get_info(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_get_info() failed"));
goto end;
}
result = acpi_battery_get_state(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_get_state() failed"));
goto end;
}
result = acpi_battery_get_alarm(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_get_alarm() failed"));
goto end;
}
end:
return result;
}
static int acpi_ac_get_present(struct acpi_sbs *sbs)
{
int result = 0;
s16 charger_status;
result = acpi_sbs_read_word(sbs, ACPI_SBC_SMBUS_ADDR, 0x13,
&charger_status);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
goto end;
}
sbs->ac.ac_present = (charger_status & 0x8000) >> 15;
end:
return result;
}
/* --------------------------------------------------------------------------
FS Interface (/proc/acpi)
-------------------------------------------------------------------------- */
/* Generic Routines */
static int
acpi_sbs_generic_add_fs(struct proc_dir_entry **dir,
struct proc_dir_entry *parent_dir,
char *dir_name,
struct file_operations *info_fops,
struct file_operations *state_fops,
struct file_operations *alarm_fops, void *data)
{
struct proc_dir_entry *entry = NULL;
if (!*dir) {
*dir = proc_mkdir(dir_name, parent_dir);
if (!*dir) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"proc_mkdir() failed"));
return -ENODEV;
}
(*dir)->owner = THIS_MODULE;
}
/* 'info' [R] */
if (info_fops) {
entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
if (!entry) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"create_proc_entry() failed"));
} else {
entry->proc_fops = info_fops;
entry->data = data;
entry->owner = THIS_MODULE;
}
}
/* 'state' [R] */
if (state_fops) {
entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
if (!entry) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"create_proc_entry() failed"));
} else {
entry->proc_fops = state_fops;
entry->data = data;
entry->owner = THIS_MODULE;
}
}
/* 'alarm' [R/W] */
if (alarm_fops) {
entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
if (!entry) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"create_proc_entry() failed"));
} else {
entry->proc_fops = alarm_fops;
entry->data = data;
entry->owner = THIS_MODULE;
}
}
return 0;
}
static void
acpi_sbs_generic_remove_fs(struct proc_dir_entry **dir,
struct proc_dir_entry *parent_dir)
{
if (*dir) {
remove_proc_entry(ACPI_SBS_FILE_INFO, *dir);
remove_proc_entry(ACPI_SBS_FILE_STATE, *dir);
remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir);
remove_proc_entry((*dir)->name, parent_dir);
*dir = NULL;
}
}
/* Smart Battery Interface */
static struct proc_dir_entry *acpi_battery_dir = NULL;
static int acpi_battery_read_info(struct seq_file *seq, void *offset)
{
struct acpi_battery *battery = seq->private;
struct acpi_sbs *sbs = battery->sbs;
int cscale;
int result = 0;
if (sbs_mutex_lock(sbs)) {
return -ENODEV;
}
result = acpi_check_update_proc(sbs);
if (result)
goto end;
if (update_time == 0) {
result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_INFO);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_update_run() failed"));
}
}
if (battery->battery_present) {
seq_printf(seq, "present: yes\n");
} else {
seq_printf(seq, "present: no\n");
goto end;
}
if (battery->info.capacity_mode) {
cscale = battery->info.vscale * battery->info.ipscale;
} else {
cscale = battery->info.ipscale;
}
seq_printf(seq, "design capacity: %i%s\n",
battery->info.design_capacity * cscale,
battery->info.capacity_mode ? "0 mWh" : " mAh");
seq_printf(seq, "last full capacity: %i%s\n",
battery->info.full_charge_capacity * cscale,
battery->info.capacity_mode ? "0 mWh" : " mAh");
seq_printf(seq, "battery technology: rechargeable\n");
seq_printf(seq, "design voltage: %i mV\n",
battery->info.design_voltage * battery->info.vscale);
seq_printf(seq, "design capacity warning: unknown\n");
seq_printf(seq, "design capacity low: unknown\n");
seq_printf(seq, "capacity granularity 1: unknown\n");
seq_printf(seq, "capacity granularity 2: unknown\n");
seq_printf(seq, "model number: %s\n",
battery->info.device_name);
seq_printf(seq, "serial number: %i\n",
battery->info.serial_number);
seq_printf(seq, "battery type: %s\n",
battery->info.device_chemistry);
seq_printf(seq, "OEM info: %s\n",
battery->info.manufacturer_name);
end:
sbs_mutex_unlock(sbs);
return result;
}
static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
{
return single_open(file, acpi_battery_read_info, PDE(inode)->data);
}
static int acpi_battery_read_state(struct seq_file *seq, void *offset)
{
struct acpi_battery *battery = seq->private;
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
int cscale;
int foo;
if (sbs_mutex_lock(sbs)) {
return -ENODEV;
}
result = acpi_check_update_proc(sbs);
if (result)
goto end;
if (update_time == 0) {
result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_STATE);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_update_run() failed"));
}
}
if (battery->battery_present) {
seq_printf(seq, "present: yes\n");
} else {
seq_printf(seq, "present: no\n");
goto end;
}
if (battery->info.capacity_mode) {
cscale = battery->info.vscale * battery->info.ipscale;
} else {
cscale = battery->info.ipscale;
}
if (battery->state.battery_state & 0x0010) {
seq_printf(seq, "capacity state: critical\n");
} else {
seq_printf(seq, "capacity state: ok\n");
}
foo = (s16) battery->state.amperage * battery->info.ipscale;
if (battery->info.capacity_mode) {
foo = foo * battery->info.design_voltage / 1000;
}
if (battery->state.amperage < 0) {
seq_printf(seq, "charging state: discharging\n");
seq_printf(seq, "present rate: %d %s\n",
-foo, battery->info.capacity_mode ? "mW" : "mA");
} else if (battery->state.amperage > 0) {
seq_printf(seq, "charging state: charging\n");
seq_printf(seq, "present rate: %d %s\n",
foo, battery->info.capacity_mode ? "mW" : "mA");
} else {
seq_printf(seq, "charging state: charged\n");
seq_printf(seq, "present rate: 0 %s\n",
battery->info.capacity_mode ? "mW" : "mA");
}
seq_printf(seq, "remaining capacity: %i%s\n",
battery->state.remaining_capacity * cscale,
battery->info.capacity_mode ? "0 mWh" : " mAh");
seq_printf(seq, "present voltage: %i mV\n",
battery->state.voltage * battery->info.vscale);
end:
sbs_mutex_unlock(sbs);
return result;
}
static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
{
return single_open(file, acpi_battery_read_state, PDE(inode)->data);
}
static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
{
struct acpi_battery *battery = seq->private;
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
int cscale;
if (sbs_mutex_lock(sbs)) {
return -ENODEV;
}
result = acpi_check_update_proc(sbs);
if (result)
goto end;
if (update_time == 0) {
result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_ALARM);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_update_run() failed"));
}
}
if (!battery->battery_present) {
seq_printf(seq, "present: no\n");
goto end;
}
if (battery->info.capacity_mode) {
cscale = battery->info.vscale * battery->info.ipscale;
} else {
cscale = battery->info.ipscale;
}
seq_printf(seq, "alarm: ");
if (battery->alarm.remaining_capacity) {
seq_printf(seq, "%i%s\n",
battery->alarm.remaining_capacity * cscale,
battery->info.capacity_mode ? "0 mWh" : " mAh");
} else {
seq_printf(seq, "disabled\n");
}
end:
sbs_mutex_unlock(sbs);
return result;
}
static ssize_t
acpi_battery_write_alarm(struct file *file, const char __user * buffer,
size_t count, loff_t * ppos)
{
struct seq_file *seq = file->private_data;
struct acpi_battery *battery = seq->private;
struct acpi_sbs *sbs = battery->sbs;
char alarm_string[12] = { '\0' };
int result, old_alarm, new_alarm;
if (sbs_mutex_lock(sbs)) {
return -ENODEV;
}
result = acpi_check_update_proc(sbs);
if (result)
goto end;
if (!battery->battery_present) {
result = -ENODEV;
goto end;
}
if (count > sizeof(alarm_string) - 1) {
result = -EINVAL;
goto end;
}
if (copy_from_user(alarm_string, buffer, count)) {
result = -EFAULT;
goto end;
}
alarm_string[count] = 0;
old_alarm = battery->alarm.remaining_capacity;
new_alarm = simple_strtoul(alarm_string, NULL, 0);
result = acpi_battery_set_alarm(battery, new_alarm);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_set_alarm() failed"));
acpi_battery_set_alarm(battery, old_alarm);
goto end;
}
result = acpi_battery_get_alarm(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_get_alarm() failed"));
acpi_battery_set_alarm(battery, old_alarm);
goto end;
}
end:
sbs_mutex_unlock(sbs);
if (result) {
return result;
} else {
return count;
}
}
static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
{
return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
}
static struct file_operations acpi_battery_info_fops = {
.open = acpi_battery_info_open_fs,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static struct file_operations acpi_battery_state_fops = {
.open = acpi_battery_state_open_fs,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static struct file_operations acpi_battery_alarm_fops = {
.open = acpi_battery_alarm_open_fs,
.read = seq_read,
.write = acpi_battery_write_alarm,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
/* Legacy AC Adapter Interface */
static struct proc_dir_entry *acpi_ac_dir = NULL;
static int acpi_ac_read_state(struct seq_file *seq, void *offset)
{
struct acpi_sbs *sbs = seq->private;
int result;
if (sbs_mutex_lock(sbs)) {
return -ENODEV;
}
if (update_time == 0) {
result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_AC_STATE);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_update_run() failed"));
}
}
seq_printf(seq, "state: %s\n",
sbs->ac.ac_present ? "on-line" : "off-line");
sbs_mutex_unlock(sbs);
return 0;
}
static int acpi_ac_state_open_fs(struct inode *inode, struct file *file)
{
return single_open(file, acpi_ac_read_state, PDE(inode)->data);
}
static struct file_operations acpi_ac_state_fops = {
.open = acpi_ac_state_open_fs,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
/* --------------------------------------------------------------------------
Driver Interface
-------------------------------------------------------------------------- */
/* Smart Battery */
static int acpi_battery_add(struct acpi_sbs *sbs, int id)
{
int is_present;
int result;
char dir_name[32];
struct acpi_battery *battery;
battery = &sbs->battery[id];
battery->alive = 0;
battery->init_state = 0;
battery->id = id;
battery->sbs = sbs;
result = acpi_battery_select(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_select() failed"));
goto end;
}
result = acpi_battery_get_present(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_get_present() failed"));
goto end;
}
is_present = battery->battery_present;
if (is_present) {
result = acpi_battery_init(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_init() failed"));
goto end;
}
battery->init_state = 1;
}
sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
result = acpi_sbs_generic_add_fs(&battery->battery_entry,
acpi_battery_dir,
dir_name,
&acpi_battery_info_fops,
&acpi_battery_state_fops,
&acpi_battery_alarm_fops, battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_generic_add_fs() failed"));
goto end;
}
battery->alive = 1;
printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), dir_name,
sbs->battery->battery_present ? "present" : "absent");
end:
return result;
}
static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
{
if (sbs->battery[id].battery_entry) {
acpi_sbs_generic_remove_fs(&(sbs->battery[id].battery_entry),
acpi_battery_dir);
}
}
static int acpi_ac_add(struct acpi_sbs *sbs)
{
int result;
result = acpi_ac_get_present(sbs);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_ac_get_present() failed"));
goto end;
}
result = acpi_sbs_generic_add_fs(&sbs->ac_entry,
acpi_ac_dir,
ACPI_AC_DIR_NAME,
NULL, &acpi_ac_state_fops, NULL, sbs);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_generic_add_fs() failed"));
goto end;
}
printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
ACPI_AC_DIR_NAME, sbs->ac.ac_present ? "on-line" : "off-line");
end:
return result;
}
static void acpi_ac_remove(struct acpi_sbs *sbs)
{
if (sbs->ac_entry) {
acpi_sbs_generic_remove_fs(&sbs->ac_entry, acpi_ac_dir);
}
}
static void acpi_sbs_update_time_run(unsigned long data)
{
acpi_os_execute(OSL_GPE_HANDLER, acpi_sbs_update_time, (void *)data);
}
static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type)
{
struct acpi_battery *battery;
int result = 0, cnt;
int old_ac_present = -1;
int old_battery_present = -1;
int new_ac_present = -1;
int new_battery_present = -1;
int id_min = 0, id_max = MAX_SBS_BAT - 1;
char dir_name[32];
int do_battery_init = 0, do_ac_init = 0;
int old_remaining_capacity = 0;
int update_battery = 1;
int up_tm = update_time;
if (sbs_zombie(sbs)) {
goto end;
}
if (id >= 0) {
id_min = id_max = id;
}
if (data_type == DATA_TYPE_COMMON && up_tm > 0) {
cnt = up_tm / (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm);
if (sbs->run_cnt % cnt != 0) {
update_battery = 0;
}
}
sbs->run_cnt++;
old_ac_present = sbs->ac.ac_present;
result = acpi_ac_get_present(sbs);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_ac_get_present() failed"));
}
new_ac_present = sbs->ac.ac_present;
do_ac_init = (old_ac_present != new_ac_present);
if (sbs->run_cnt == 1 && data_type == DATA_TYPE_COMMON) {
do_ac_init = 1;
}
if (do_ac_init) {
result = acpi_sbs_generate_event(sbs->device,
ACPI_SBS_AC_NOTIFY_STATUS,
new_ac_present,
ACPI_AC_DIR_NAME,
ACPI_AC_CLASS);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_generate_event() failed"));
}
}
if (data_type == DATA_TYPE_COMMON) {
if (!do_ac_init && !update_battery) {
goto end;
}
}
if (data_type == DATA_TYPE_AC_STATE && !do_ac_init) {
goto end;
}
for (id = id_min; id <= id_max; id++) {
battery = &sbs->battery[id];
if (battery->alive == 0) {
continue;
}
old_remaining_capacity = battery->state.remaining_capacity;
old_battery_present = battery->battery_present;
result = acpi_battery_select(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_select() failed"));
}
result = acpi_battery_get_present(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_get_present() failed"));
}
new_battery_present = battery->battery_present;
do_battery_init = ((old_battery_present != new_battery_present)
&& new_battery_present);
if (!new_battery_present)
goto event;
if (do_ac_init || do_battery_init) {
result = acpi_battery_init(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_init() "
"failed"));
}
}
if (sbs_zombie(sbs)) {
goto end;
}
if ((data_type == DATA_TYPE_COMMON
|| data_type == DATA_TYPE_INFO)
&& new_battery_present) {
result = acpi_battery_get_info(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_get_info() failed"));
}
}
if (data_type == DATA_TYPE_INFO) {
continue;
}
if (sbs_zombie(sbs)) {
goto end;
}
if ((data_type == DATA_TYPE_COMMON
|| data_type == DATA_TYPE_STATE)
&& new_battery_present) {
result = acpi_battery_get_state(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_get_state() failed"));
}
}
if (data_type == DATA_TYPE_STATE) {
goto event;
}
if (sbs_zombie(sbs)) {
goto end;
}
if ((data_type == DATA_TYPE_COMMON
|| data_type == DATA_TYPE_ALARM)
&& new_battery_present) {
result = acpi_battery_get_alarm(battery);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_get_alarm() "
"failed"));
}
}
if (data_type == DATA_TYPE_ALARM) {
continue;
}
if (sbs_zombie(sbs)) {
goto end;
}
event:
if (old_battery_present != new_battery_present || do_ac_init ||
old_remaining_capacity !=
battery->state.remaining_capacity) {
sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id);
result = acpi_sbs_generate_event(sbs->device,
ACPI_SBS_BATTERY_NOTIFY_STATUS,
new_battery_present,
dir_name,
ACPI_BATTERY_CLASS);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_generate_event() "
"failed"));
}
}
}
end:
return result;
}
static void acpi_sbs_update_time(void *data)
{
struct acpi_sbs *sbs = data;
unsigned long delay = -1;
int result;
unsigned int up_tm = update_time;
if (sbs_mutex_lock(sbs))
return;
result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_COMMON);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_update_run() failed"));
}
if (sbs_zombie(sbs)) {
goto end;
}
if (!up_tm) {
if (timer_pending(&sbs->update_timer))
del_timer(&sbs->update_timer);
} else {
delay = (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm);
delay = jiffies + HZ * delay;
if (timer_pending(&sbs->update_timer)) {
mod_timer(&sbs->update_timer, delay);
} else {
sbs->update_timer.data = (unsigned long)data;
sbs->update_timer.function = acpi_sbs_update_time_run;
sbs->update_timer.expires = delay;
add_timer(&sbs->update_timer);
}
}
end:
sbs_mutex_unlock(sbs);
}
static int acpi_sbs_add(struct acpi_device *device)
{
struct acpi_sbs *sbs = NULL;
int result = 0, remove_result = 0;
int id;
acpi_status status = AE_OK;
unsigned long val;
status =
acpi_evaluate_integer(device->handle, "_EC", NULL, &val);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Error obtaining _EC"));
return -EIO;
}
sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
if (!sbs) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR, "kzalloc() failed"));
result = -ENOMEM;
goto end;
}
mutex_init(&sbs->mutex);
sbs_mutex_lock(sbs);
sbs->base = 0xff & (val >> 8);
sbs->device = device;
strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
acpi_driver_data(device) = sbs;
result = acpi_ac_add(sbs);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ac_add() failed"));
goto end;
}
acpi_sbsm_get_info(sbs);
if (!sbs->sbsm_present) {
result = acpi_battery_add(sbs, 0);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_add() failed"));
goto end;
}
} else {
for (id = 0; id < MAX_SBS_BAT; id++) {
if ((sbs->sbsm_batteries_supported & (1 << id))) {
result = acpi_battery_add(sbs, id);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_battery_add() failed"));
goto end;
}
}
}
}
init_timer(&sbs->update_timer);
result = acpi_check_update_proc(sbs);
if (result)
goto end;
end:
sbs_mutex_unlock(sbs);
if (result) {
remove_result = acpi_sbs_remove(device, 0);
if (remove_result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_remove() failed"));
}
}
return result;
}
static int acpi_sbs_remove(struct acpi_device *device, int type)
{
struct acpi_sbs *sbs;
int id;
if (!device) {
return -EINVAL;
}
sbs = acpi_driver_data(device);
if (!sbs) {
return -EINVAL;
}
sbs_mutex_lock(sbs);
sbs->zombie = 1;
del_timer_sync(&sbs->update_timer);
acpi_os_wait_events_complete(NULL);
del_timer_sync(&sbs->update_timer);
for (id = 0; id < MAX_SBS_BAT; id++) {
acpi_battery_remove(sbs, id);
}
acpi_ac_remove(sbs);
sbs_mutex_unlock(sbs);
mutex_destroy(&sbs->mutex);
kfree(sbs);
return 0;
}
static void acpi_sbs_rmdirs(void)
{
if (acpi_ac_dir) {
acpi_unlock_ac_dir(acpi_ac_dir);
acpi_ac_dir = NULL;
}
if (acpi_battery_dir) {
acpi_unlock_battery_dir(acpi_battery_dir);
acpi_battery_dir = NULL;
}
}
static int acpi_sbs_resume(struct acpi_device *device)
{
struct acpi_sbs *sbs;
if (!device)
return -EINVAL;
sbs = device->driver_data;
sbs->run_cnt = 0;
return 0;
}
static int __init acpi_sbs_init(void)
{
int result = 0;
if (acpi_disabled)
return -ENODEV;
if (capacity_mode != DEF_CAPACITY_UNIT
&& capacity_mode != MAH_CAPACITY_UNIT
&& capacity_mode != MWH_CAPACITY_UNIT) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"invalid capacity_mode = %d", capacity_mode));
return -EINVAL;
}
acpi_ac_dir = acpi_lock_ac_dir();
if (!acpi_ac_dir) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_lock_ac_dir() failed"));
return -ENODEV;
}
acpi_battery_dir = acpi_lock_battery_dir();
if (!acpi_battery_dir) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_lock_battery_dir() failed"));
acpi_sbs_rmdirs();
return -ENODEV;
}
result = acpi_bus_register_driver(&acpi_sbs_driver);
if (result < 0) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_bus_register_driver() failed"));
acpi_sbs_rmdirs();
return -ENODEV;
}
return 0;
}
static void __exit acpi_sbs_exit(void)
{
acpi_bus_unregister_driver(&acpi_sbs_driver);
acpi_sbs_rmdirs();
return;
}
module_init(acpi_sbs_init);
module_exit(acpi_sbs_exit);
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