linux/drivers/acpi/sbs.c
Rafael J. Wysocki 51fac8388a ACPI: Remove useless type argument of driver .remove() operation
The second argument of ACPI driver .remove() operation is only used
by the ACPI processor driver and the value passed to that driver
through it is always available from the given struct acpi_device
object's removal_type field.  For this reason, the second ACPI driver
.remove() argument is in fact useless, so drop it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
2013-01-26 00:37:24 +01:00

1049 lines
29 KiB
C

/*
* sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $)
*
* Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
* Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
* 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/slab.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#ifdef CONFIG_ACPI_PROCFS_POWER
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <asm/uaccess.h>
#endif
#include <linux/acpi.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
#include <linux/delay.h>
#include <linux/power_supply.h>
#include "sbshc.h"
#define PREFIX "ACPI: "
#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_SBS_NOTIFY_STATUS 0x80
#define ACPI_SBS_NOTIFY_INFO 0x81
MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
MODULE_LICENSE("GPL");
static unsigned int cache_time = 1000;
module_param(cache_time, uint, 0644);
MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
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
static const struct acpi_device_id sbs_device_ids[] = {
{"ACPI0002", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
struct acpi_battery {
struct power_supply bat;
struct acpi_sbs *sbs;
#ifdef CONFIG_ACPI_PROCFS_POWER
struct proc_dir_entry *proc_entry;
#endif
unsigned long update_time;
char name[8];
char manufacturer_name[ACPI_SBS_BLOCK_MAX];
char device_name[ACPI_SBS_BLOCK_MAX];
char device_chemistry[ACPI_SBS_BLOCK_MAX];
u16 alarm_capacity;
u16 full_charge_capacity;
u16 design_capacity;
u16 design_voltage;
u16 serial_number;
u16 cycle_count;
u16 temp_now;
u16 voltage_now;
s16 rate_now;
s16 rate_avg;
u16 capacity_now;
u16 state_of_charge;
u16 state;
u16 mode;
u16 spec;
u8 id;
u8 present:1;
u8 have_sysfs_alarm:1;
};
#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat)
struct acpi_sbs {
struct power_supply charger;
struct acpi_device *device;
struct acpi_smb_hc *hc;
struct mutex lock;
#ifdef CONFIG_ACPI_PROCFS_POWER
struct proc_dir_entry *charger_entry;
#endif
struct acpi_battery battery[MAX_SBS_BAT];
u8 batteries_supported:4;
u8 manager_present:1;
u8 charger_present:1;
};
#define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
static int acpi_sbs_remove(struct acpi_device *device);
static int acpi_battery_get_state(struct acpi_battery *battery);
static inline int battery_scale(int log)
{
int scale = 1;
while (log--)
scale *= 10;
return scale;
}
static inline int acpi_battery_vscale(struct acpi_battery *battery)
{
return battery_scale((battery->spec & 0x0f00) >> 8);
}
static inline int acpi_battery_ipscale(struct acpi_battery *battery)
{
return battery_scale((battery->spec & 0xf000) >> 12);
}
static inline int acpi_battery_mode(struct acpi_battery *battery)
{
return (battery->mode & 0x8000);
}
static inline int acpi_battery_scale(struct acpi_battery *battery)
{
return (acpi_battery_mode(battery) ? 10 : 1) *
acpi_battery_ipscale(battery);
}
static int sbs_get_ac_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct acpi_sbs *sbs = to_acpi_sbs(psy);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = sbs->charger_present;
break;
default:
return -EINVAL;
}
return 0;
}
static int acpi_battery_technology(struct acpi_battery *battery)
{
if (!strcasecmp("NiCd", battery->device_chemistry))
return POWER_SUPPLY_TECHNOLOGY_NiCd;
if (!strcasecmp("NiMH", battery->device_chemistry))
return POWER_SUPPLY_TECHNOLOGY_NiMH;
if (!strcasecmp("LION", battery->device_chemistry))
return POWER_SUPPLY_TECHNOLOGY_LION;
if (!strcasecmp("LiP", battery->device_chemistry))
return POWER_SUPPLY_TECHNOLOGY_LIPO;
return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
}
static int acpi_sbs_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct acpi_battery *battery = to_acpi_battery(psy);
if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
return -ENODEV;
acpi_battery_get_state(battery);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
if (battery->rate_now < 0)
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
else if (battery->rate_now > 0)
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_FULL;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = battery->present;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = acpi_battery_technology(battery);
break;
case POWER_SUPPLY_PROP_CYCLE_COUNT:
val->intval = battery->cycle_count;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
val->intval = battery->design_voltage *
acpi_battery_vscale(battery) * 1000;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = battery->voltage_now *
acpi_battery_vscale(battery) * 1000;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
case POWER_SUPPLY_PROP_POWER_NOW:
val->intval = abs(battery->rate_now) *
acpi_battery_ipscale(battery) * 1000;
val->intval *= (acpi_battery_mode(battery)) ?
(battery->voltage_now *
acpi_battery_vscale(battery) / 1000) : 1;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
case POWER_SUPPLY_PROP_POWER_AVG:
val->intval = abs(battery->rate_avg) *
acpi_battery_ipscale(battery) * 1000;
val->intval *= (acpi_battery_mode(battery)) ?
(battery->voltage_now *
acpi_battery_vscale(battery) / 1000) : 1;
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = battery->state_of_charge;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
val->intval = battery->design_capacity *
acpi_battery_scale(battery) * 1000;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
case POWER_SUPPLY_PROP_ENERGY_FULL:
val->intval = battery->full_charge_capacity *
acpi_battery_scale(battery) * 1000;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
case POWER_SUPPLY_PROP_ENERGY_NOW:
val->intval = battery->capacity_now *
acpi_battery_scale(battery) * 1000;
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = battery->temp_now - 2730; // dK -> dC
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = battery->device_name;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = battery->manufacturer_name;
break;
default:
return -EINVAL;
}
return 0;
}
static enum power_supply_property sbs_ac_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static enum power_supply_property sbs_charge_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property sbs_energy_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_POWER_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
POWER_SUPPLY_PROP_ENERGY_FULL,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
/* --------------------------------------------------------------------------
Smart Battery System Management
-------------------------------------------------------------------------- */
struct acpi_battery_reader {
u8 command; /* command for battery */
u8 mode; /* word or block? */
size_t offset; /* offset inside struct acpi_sbs_battery */
};
static struct acpi_battery_reader info_readers[] = {
{0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
{0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
{0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
{0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
{0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
{0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
{0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
{0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
{0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
{0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
{0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
};
static struct acpi_battery_reader state_readers[] = {
{0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
{0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
{0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
{0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
{0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
{0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
{0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
};
static int acpi_manager_get_info(struct acpi_sbs *sbs)
{
int result = 0;
u16 battery_system_info;
result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
0x04, (u8 *)&battery_system_info);
if (!result)
sbs->batteries_supported = battery_system_info & 0x000f;
return result;
}
static int acpi_battery_get_info(struct acpi_battery *battery)
{
int i, result = 0;
for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
result = acpi_smbus_read(battery->sbs->hc,
info_readers[i].mode,
ACPI_SBS_BATTERY,
info_readers[i].command,
(u8 *) battery +
info_readers[i].offset);
if (result)
break;
}
return result;
}
static int acpi_battery_get_state(struct acpi_battery *battery)
{
int i, result = 0;
if (battery->update_time &&
time_before(jiffies, battery->update_time +
msecs_to_jiffies(cache_time)))
return 0;
for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
result = acpi_smbus_read(battery->sbs->hc,
state_readers[i].mode,
ACPI_SBS_BATTERY,
state_readers[i].command,
(u8 *)battery +
state_readers[i].offset);
if (result)
goto end;
}
end:
battery->update_time = jiffies;
return result;
}
static int acpi_battery_get_alarm(struct acpi_battery *battery)
{
return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
ACPI_SBS_BATTERY, 0x01,
(u8 *)&battery->alarm_capacity);
}
static int acpi_battery_set_alarm(struct acpi_battery *battery)
{
struct acpi_sbs *sbs = battery->sbs;
u16 value, sel = 1 << (battery->id + 12);
int ret;
if (sbs->manager_present) {
ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
0x01, (u8 *)&value);
if (ret)
goto end;
if ((value & 0xf000) != sel) {
value &= 0x0fff;
value |= sel;
ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
ACPI_SBS_MANAGER,
0x01, (u8 *)&value, 2);
if (ret)
goto end;
}
}
ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
0x01, (u8 *)&battery->alarm_capacity, 2);
end:
return ret;
}
static int acpi_ac_get_present(struct acpi_sbs *sbs)
{
int result;
u16 status;
result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
0x13, (u8 *) & status);
if (!result)
sbs->charger_present = (status >> 15) & 0x1;
return result;
}
static ssize_t acpi_battery_alarm_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
acpi_battery_get_alarm(battery);
return sprintf(buf, "%d\n", battery->alarm_capacity *
acpi_battery_scale(battery) * 1000);
}
static ssize_t acpi_battery_alarm_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long x;
struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
if (sscanf(buf, "%ld\n", &x) == 1)
battery->alarm_capacity = x /
(1000 * acpi_battery_scale(battery));
if (battery->present)
acpi_battery_set_alarm(battery);
return count;
}
static struct device_attribute alarm_attr = {
.attr = {.name = "alarm", .mode = 0644},
.show = acpi_battery_alarm_show,
.store = acpi_battery_alarm_store,
};
/* --------------------------------------------------------------------------
FS Interface (/proc/acpi)
-------------------------------------------------------------------------- */
#ifdef CONFIG_ACPI_PROCFS_POWER
/* Generic Routines */
static int
acpi_sbs_add_fs(struct proc_dir_entry **dir,
struct proc_dir_entry *parent_dir,
char *dir_name,
const struct file_operations *info_fops,
const struct file_operations *state_fops,
const struct file_operations *alarm_fops, void *data)
{
printk(KERN_WARNING PREFIX "Deprecated procfs I/F for SBS is loaded,"
" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
if (!*dir) {
*dir = proc_mkdir(dir_name, parent_dir);
if (!*dir) {
return -ENODEV;
}
}
/* 'info' [R] */
if (info_fops)
proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir,
info_fops, data);
/* 'state' [R] */
if (state_fops)
proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir,
state_fops, data);
/* 'alarm' [R/W] */
if (alarm_fops)
proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir,
alarm_fops, data);
return 0;
}
static void
acpi_sbs_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 inline char *acpi_battery_units(struct acpi_battery *battery)
{
return acpi_battery_mode(battery) ? " mW" : " mA";
}
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 result = 0;
mutex_lock(&sbs->lock);
seq_printf(seq, "present: %s\n",
(battery->present) ? "yes" : "no");
if (!battery->present)
goto end;
seq_printf(seq, "design capacity: %i%sh\n",
battery->design_capacity * acpi_battery_scale(battery),
acpi_battery_units(battery));
seq_printf(seq, "last full capacity: %i%sh\n",
battery->full_charge_capacity * acpi_battery_scale(battery),
acpi_battery_units(battery));
seq_printf(seq, "battery technology: rechargeable\n");
seq_printf(seq, "design voltage: %i mV\n",
battery->design_voltage * acpi_battery_vscale(battery));
seq_printf(seq, "design capacity warning: unknown\n");
seq_printf(seq, "design capacity low: unknown\n");
seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
seq_printf(seq, "capacity granularity 1: unknown\n");
seq_printf(seq, "capacity granularity 2: unknown\n");
seq_printf(seq, "model number: %s\n", battery->device_name);
seq_printf(seq, "serial number: %i\n",
battery->serial_number);
seq_printf(seq, "battery type: %s\n",
battery->device_chemistry);
seq_printf(seq, "OEM info: %s\n",
battery->manufacturer_name);
end:
mutex_unlock(&sbs->lock);
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 rate;
mutex_lock(&sbs->lock);
seq_printf(seq, "present: %s\n",
(battery->present) ? "yes" : "no");
if (!battery->present)
goto end;
acpi_battery_get_state(battery);
seq_printf(seq, "capacity state: %s\n",
(battery->state & 0x0010) ? "critical" : "ok");
seq_printf(seq, "charging state: %s\n",
(battery->rate_now < 0) ? "discharging" :
((battery->rate_now > 0) ? "charging" : "charged"));
rate = abs(battery->rate_now) * acpi_battery_ipscale(battery);
rate *= (acpi_battery_mode(battery))?(battery->voltage_now *
acpi_battery_vscale(battery)/1000):1;
seq_printf(seq, "present rate: %d%s\n", rate,
acpi_battery_units(battery));
seq_printf(seq, "remaining capacity: %i%sh\n",
battery->capacity_now * acpi_battery_scale(battery),
acpi_battery_units(battery));
seq_printf(seq, "present voltage: %i mV\n",
battery->voltage_now * acpi_battery_vscale(battery));
end:
mutex_unlock(&sbs->lock);
return 0;
}
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;
mutex_lock(&sbs->lock);
if (!battery->present) {
seq_printf(seq, "present: no\n");
goto end;
}
acpi_battery_get_alarm(battery);
seq_printf(seq, "alarm: ");
if (battery->alarm_capacity)
seq_printf(seq, "%i%sh\n",
battery->alarm_capacity *
acpi_battery_scale(battery),
acpi_battery_units(battery));
else
seq_printf(seq, "disabled\n");
end:
mutex_unlock(&sbs->lock);
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 = 0;
mutex_lock(&sbs->lock);
if (!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;
battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) /
acpi_battery_scale(battery);
acpi_battery_set_alarm(battery);
end:
mutex_unlock(&sbs->lock);
if (result)
return result;
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 const 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 const 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 const 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;
mutex_lock(&sbs->lock);
seq_printf(seq, "state: %s\n",
sbs->charger_present ? "on-line" : "off-line");
mutex_unlock(&sbs->lock);
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 const 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,
};
#endif
/* --------------------------------------------------------------------------
Driver Interface
-------------------------------------------------------------------------- */
static int acpi_battery_read(struct acpi_battery *battery)
{
int result = 0, saved_present = battery->present;
u16 state;
if (battery->sbs->manager_present) {
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
if (!result)
battery->present = state & (1 << battery->id);
state &= 0x0fff;
state |= 1 << (battery->id + 12);
acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
} else if (battery->id == 0)
battery->present = 1;
if (result || !battery->present)
return result;
if (saved_present != battery->present) {
battery->update_time = 0;
result = acpi_battery_get_info(battery);
if (result)
return result;
}
result = acpi_battery_get_state(battery);
return result;
}
/* Smart Battery */
static int acpi_battery_add(struct acpi_sbs *sbs, int id)
{
struct acpi_battery *battery = &sbs->battery[id];
int result;
battery->id = id;
battery->sbs = sbs;
result = acpi_battery_read(battery);
if (result)
return result;
sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
#ifdef CONFIG_ACPI_PROCFS_POWER
acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
battery->name, &acpi_battery_info_fops,
&acpi_battery_state_fops, &acpi_battery_alarm_fops,
battery);
#endif
battery->bat.name = battery->name;
battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
if (!acpi_battery_mode(battery)) {
battery->bat.properties = sbs_charge_battery_props;
battery->bat.num_properties =
ARRAY_SIZE(sbs_charge_battery_props);
} else {
battery->bat.properties = sbs_energy_battery_props;
battery->bat.num_properties =
ARRAY_SIZE(sbs_energy_battery_props);
}
battery->bat.get_property = acpi_sbs_battery_get_property;
result = power_supply_register(&sbs->device->dev, &battery->bat);
if (result)
goto end;
result = device_create_file(battery->bat.dev, &alarm_attr);
if (result)
goto end;
battery->have_sysfs_alarm = 1;
end:
printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
battery->name, battery->present ? "present" : "absent");
return result;
}
static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
{
struct acpi_battery *battery = &sbs->battery[id];
if (battery->bat.dev) {
if (battery->have_sysfs_alarm)
device_remove_file(battery->bat.dev, &alarm_attr);
power_supply_unregister(&battery->bat);
}
#ifdef CONFIG_ACPI_PROCFS_POWER
if (battery->proc_entry)
acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
#endif
}
static int acpi_charger_add(struct acpi_sbs *sbs)
{
int result;
result = acpi_ac_get_present(sbs);
if (result)
goto end;
#ifdef CONFIG_ACPI_PROCFS_POWER
result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
ACPI_AC_DIR_NAME, NULL,
&acpi_ac_state_fops, NULL, sbs);
if (result)
goto end;
#endif
sbs->charger.name = "sbs-charger";
sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
sbs->charger.properties = sbs_ac_props;
sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);
sbs->charger.get_property = sbs_get_ac_property;
power_supply_register(&sbs->device->dev, &sbs->charger);
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->charger_present ? "on-line" : "off-line");
end:
return result;
}
static void acpi_charger_remove(struct acpi_sbs *sbs)
{
if (sbs->charger.dev)
power_supply_unregister(&sbs->charger);
#ifdef CONFIG_ACPI_PROCFS_POWER
if (sbs->charger_entry)
acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
#endif
}
static void acpi_sbs_callback(void *context)
{
int id;
struct acpi_sbs *sbs = context;
struct acpi_battery *bat;
u8 saved_charger_state = sbs->charger_present;
u8 saved_battery_state;
acpi_ac_get_present(sbs);
if (sbs->charger_present != saved_charger_state) {
#ifdef CONFIG_ACPI_PROC_EVENT
acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME,
ACPI_SBS_NOTIFY_STATUS,
sbs->charger_present);
#endif
kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);
}
if (sbs->manager_present) {
for (id = 0; id < MAX_SBS_BAT; ++id) {
if (!(sbs->batteries_supported & (1 << id)))
continue;
bat = &sbs->battery[id];
saved_battery_state = bat->present;
acpi_battery_read(bat);
if (saved_battery_state == bat->present)
continue;
#ifdef CONFIG_ACPI_PROC_EVENT
acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS,
bat->name,
ACPI_SBS_NOTIFY_STATUS,
bat->present);
#endif
kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);
}
}
}
static int acpi_sbs_add(struct acpi_device *device)
{
struct acpi_sbs *sbs;
int result = 0;
int id;
sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
if (!sbs) {
result = -ENOMEM;
goto end;
}
mutex_init(&sbs->lock);
sbs->hc = acpi_driver_data(device->parent);
sbs->device = device;
strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
device->driver_data = sbs;
result = acpi_charger_add(sbs);
if (result)
goto end;
result = acpi_manager_get_info(sbs);
if (!result) {
sbs->manager_present = 1;
for (id = 0; id < MAX_SBS_BAT; ++id)
if ((sbs->batteries_supported & (1 << id)))
acpi_battery_add(sbs, id);
} else
acpi_battery_add(sbs, 0);
acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
end:
if (result)
acpi_sbs_remove(device);
return result;
}
static int acpi_sbs_remove(struct acpi_device *device)
{
struct acpi_sbs *sbs;
int id;
if (!device)
return -EINVAL;
sbs = acpi_driver_data(device);
if (!sbs)
return -EINVAL;
mutex_lock(&sbs->lock);
acpi_smbus_unregister_callback(sbs->hc);
for (id = 0; id < MAX_SBS_BAT; ++id)
acpi_battery_remove(sbs, id);
acpi_charger_remove(sbs);
mutex_unlock(&sbs->lock);
mutex_destroy(&sbs->lock);
kfree(sbs);
return 0;
}
static void acpi_sbs_rmdirs(void)
{
#ifdef CONFIG_ACPI_PROCFS_POWER
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;
}
#endif
}
#ifdef CONFIG_PM_SLEEP
static int acpi_sbs_resume(struct device *dev)
{
struct acpi_sbs *sbs;
if (!dev)
return -EINVAL;
sbs = to_acpi_device(dev)->driver_data;
acpi_sbs_callback(sbs);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume);
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,
},
.drv.pm = &acpi_sbs_pm,
};
static int __init acpi_sbs_init(void)
{
int result = 0;
if (acpi_disabled)
return -ENODEV;
#ifdef CONFIG_ACPI_PROCFS_POWER
acpi_ac_dir = acpi_lock_ac_dir();
if (!acpi_ac_dir)
return -ENODEV;
acpi_battery_dir = acpi_lock_battery_dir();
if (!acpi_battery_dir) {
acpi_sbs_rmdirs();
return -ENODEV;
}
#endif
result = acpi_bus_register_driver(&acpi_sbs_driver);
if (result < 0) {
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);