mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
386 lines
9.2 KiB
C
386 lines
9.2 KiB
C
/*
|
|
* acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
|
|
*
|
|
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
|
|
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* 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/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/seq_file.h>
|
|
#endif
|
|
#include <linux/power_supply.h>
|
|
#include <acpi/acpi_bus.h>
|
|
#include <acpi/acpi_drivers.h>
|
|
|
|
#define PREFIX "ACPI: "
|
|
|
|
#define ACPI_AC_CLASS "ac_adapter"
|
|
#define ACPI_AC_DEVICE_NAME "AC Adapter"
|
|
#define ACPI_AC_FILE_STATE "state"
|
|
#define ACPI_AC_NOTIFY_STATUS 0x80
|
|
#define ACPI_AC_STATUS_OFFLINE 0x00
|
|
#define ACPI_AC_STATUS_ONLINE 0x01
|
|
#define ACPI_AC_STATUS_UNKNOWN 0xFF
|
|
|
|
#define _COMPONENT ACPI_AC_COMPONENT
|
|
ACPI_MODULE_NAME("ac");
|
|
|
|
MODULE_AUTHOR("Paul Diefenbaugh");
|
|
MODULE_DESCRIPTION("ACPI AC Adapter Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
extern struct proc_dir_entry *acpi_lock_ac_dir(void);
|
|
extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
|
|
static int acpi_ac_open_fs(struct inode *inode, struct file *file);
|
|
#endif
|
|
|
|
static int acpi_ac_add(struct acpi_device *device);
|
|
static int acpi_ac_remove(struct acpi_device *device, int type);
|
|
static int acpi_ac_resume(struct acpi_device *device);
|
|
static void acpi_ac_notify(struct acpi_device *device, u32 event);
|
|
|
|
static const struct acpi_device_id ac_device_ids[] = {
|
|
{"ACPI0003", 0},
|
|
{"", 0},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, ac_device_ids);
|
|
|
|
static struct acpi_driver acpi_ac_driver = {
|
|
.name = "ac",
|
|
.class = ACPI_AC_CLASS,
|
|
.ids = ac_device_ids,
|
|
.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
|
|
.ops = {
|
|
.add = acpi_ac_add,
|
|
.remove = acpi_ac_remove,
|
|
.resume = acpi_ac_resume,
|
|
.notify = acpi_ac_notify,
|
|
},
|
|
};
|
|
|
|
struct acpi_ac {
|
|
struct power_supply charger;
|
|
struct acpi_device * device;
|
|
unsigned long long state;
|
|
};
|
|
|
|
#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
static const struct file_operations acpi_ac_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = acpi_ac_open_fs,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
#endif
|
|
|
|
/* --------------------------------------------------------------------------
|
|
AC Adapter Management
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int acpi_ac_get_state(struct acpi_ac *ac)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
|
|
if (!ac)
|
|
return -EINVAL;
|
|
|
|
status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
|
|
ac->state = ACPI_AC_STATUS_UNKNOWN;
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
sysfs I/F
|
|
-------------------------------------------------------------------------- */
|
|
static int get_ac_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct acpi_ac *ac = to_acpi_ac(psy);
|
|
|
|
if (!ac)
|
|
return -ENODEV;
|
|
|
|
if (acpi_ac_get_state(ac))
|
|
return -ENODEV;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
val->intval = ac->state;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static enum power_supply_property ac_props[] = {
|
|
POWER_SUPPLY_PROP_ONLINE,
|
|
};
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
/* --------------------------------------------------------------------------
|
|
FS Interface (/proc)
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static struct proc_dir_entry *acpi_ac_dir;
|
|
|
|
static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_ac *ac = seq->private;
|
|
|
|
|
|
if (!ac)
|
|
return 0;
|
|
|
|
if (acpi_ac_get_state(ac)) {
|
|
seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
|
|
return 0;
|
|
}
|
|
|
|
seq_puts(seq, "state: ");
|
|
switch (ac->state) {
|
|
case ACPI_AC_STATUS_OFFLINE:
|
|
seq_puts(seq, "off-line\n");
|
|
break;
|
|
case ACPI_AC_STATUS_ONLINE:
|
|
seq_puts(seq, "on-line\n");
|
|
break;
|
|
default:
|
|
seq_puts(seq, "unknown\n");
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_ac_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
|
|
}
|
|
|
|
static int acpi_ac_add_fs(struct acpi_device *device)
|
|
{
|
|
struct proc_dir_entry *entry = NULL;
|
|
|
|
printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
|
|
" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
|
|
if (!acpi_device_dir(device)) {
|
|
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
|
|
acpi_ac_dir);
|
|
if (!acpi_device_dir(device))
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* 'state' [R] */
|
|
entry = proc_create_data(ACPI_AC_FILE_STATE,
|
|
S_IRUGO, acpi_device_dir(device),
|
|
&acpi_ac_fops, acpi_driver_data(device));
|
|
if (!entry)
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_ac_remove_fs(struct acpi_device *device)
|
|
{
|
|
|
|
if (acpi_device_dir(device)) {
|
|
remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
|
|
|
|
remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
|
|
acpi_device_dir(device) = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Model
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static void acpi_ac_notify(struct acpi_device *device, u32 event)
|
|
{
|
|
struct acpi_ac *ac = acpi_driver_data(device);
|
|
|
|
|
|
if (!ac)
|
|
return;
|
|
|
|
switch (event) {
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Unsupported event [0x%x]\n", event));
|
|
case ACPI_AC_NOTIFY_STATUS:
|
|
case ACPI_NOTIFY_BUS_CHECK:
|
|
case ACPI_NOTIFY_DEVICE_CHECK:
|
|
acpi_ac_get_state(ac);
|
|
acpi_bus_generate_proc_event(device, event, (u32) ac->state);
|
|
acpi_bus_generate_netlink_event(device->pnp.device_class,
|
|
dev_name(&device->dev), event,
|
|
(u32) ac->state);
|
|
acpi_notifier_call_chain(device, event, (u32) ac->state);
|
|
kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static int acpi_ac_add(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
struct acpi_ac *ac = NULL;
|
|
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
|
|
if (!ac)
|
|
return -ENOMEM;
|
|
|
|
ac->device = device;
|
|
strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_AC_CLASS);
|
|
device->driver_data = ac;
|
|
|
|
result = acpi_ac_get_state(ac);
|
|
if (result)
|
|
goto end;
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
result = acpi_ac_add_fs(device);
|
|
#endif
|
|
if (result)
|
|
goto end;
|
|
ac->charger.name = acpi_device_bid(device);
|
|
ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
|
|
ac->charger.properties = ac_props;
|
|
ac->charger.num_properties = ARRAY_SIZE(ac_props);
|
|
ac->charger.get_property = get_ac_property;
|
|
power_supply_register(&ac->device->dev, &ac->charger);
|
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
|
|
acpi_device_name(device), acpi_device_bid(device),
|
|
ac->state ? "on-line" : "off-line");
|
|
|
|
end:
|
|
if (result) {
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_ac_remove_fs(device);
|
|
#endif
|
|
kfree(ac);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static int acpi_ac_resume(struct acpi_device *device)
|
|
{
|
|
struct acpi_ac *ac;
|
|
unsigned old_state;
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
ac = acpi_driver_data(device);
|
|
old_state = ac->state;
|
|
if (acpi_ac_get_state(ac))
|
|
return 0;
|
|
if (old_state != ac->state)
|
|
kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_ac_remove(struct acpi_device *device, int type)
|
|
{
|
|
struct acpi_ac *ac = NULL;
|
|
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
|
|
ac = acpi_driver_data(device);
|
|
|
|
if (ac->charger.dev)
|
|
power_supply_unregister(&ac->charger);
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_ac_remove_fs(device);
|
|
#endif
|
|
|
|
kfree(ac);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init acpi_ac_init(void)
|
|
{
|
|
int result;
|
|
|
|
if (acpi_disabled)
|
|
return -ENODEV;
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_ac_dir = acpi_lock_ac_dir();
|
|
if (!acpi_ac_dir)
|
|
return -ENODEV;
|
|
#endif
|
|
|
|
result = acpi_bus_register_driver(&acpi_ac_driver);
|
|
if (result < 0) {
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_unlock_ac_dir(acpi_ac_dir);
|
|
#endif
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit acpi_ac_exit(void)
|
|
{
|
|
|
|
acpi_bus_unregister_driver(&acpi_ac_driver);
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_unlock_ac_dir(acpi_ac_dir);
|
|
#endif
|
|
|
|
return;
|
|
}
|
|
|
|
module_init(acpi_ac_init);
|
|
module_exit(acpi_ac_exit);
|