* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (179 commits) ACPI: Fix acpi_processor_idle and idle= boot parameters interaction acpi: fix section mismatch warning in pnpacpi intel_menlo: fix build warning ACPI: Cleanup: Remove unneeded, multiple local dummy variables ACPI: video - fix permissions on some proc entries ACPI: video - properly handle errors when registering proc elements ACPI: video - do not store invalid entries in attached_array list ACPI: re-name acpi_pm_ops to acpi_suspend_ops ACER_WMI/ASUS_LAPTOP: fix build bug thinkpad_acpi: fix possible NULL pointer dereference if kstrdup failed ACPI: check a return value correctly in acpi_power_get_context() #if 0 acpi/bay.c:eject_removable_drive() eeepc-laptop: add hwmon fan control eeepc-laptop: add backlight eeepc-laptop: add base driver ACPI: thinkpad-acpi: bump up version to 0.20 ACPI: thinkpad-acpi: fix selects in Kconfig ACPI: thinkpad-acpi: use a private workqueue ACPI: thinkpad-acpi: fluff really minor fix ACPI: thinkpad-acpi: use uppercase for "LED" on user documentation ... Fixed conflicts in drivers/acpi/video.c and drivers/misc/intel_menlow.c manually.
368 lines
8.8 KiB
C
368 lines
8.8 KiB
C
/*
|
|
* acpi_fan.c - ACPI Fan Driver ($Revision: 29 $)
|
|
*
|
|
* 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/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <asm/uaccess.h>
|
|
#include <linux/thermal.h>
|
|
#include <acpi/acpi_bus.h>
|
|
#include <acpi/acpi_drivers.h>
|
|
|
|
#define ACPI_FAN_COMPONENT 0x00200000
|
|
#define ACPI_FAN_CLASS "fan"
|
|
#define ACPI_FAN_FILE_STATE "state"
|
|
|
|
#define _COMPONENT ACPI_FAN_COMPONENT
|
|
ACPI_MODULE_NAME("fan");
|
|
|
|
MODULE_AUTHOR("Paul Diefenbaugh");
|
|
MODULE_DESCRIPTION("ACPI Fan Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int acpi_fan_add(struct acpi_device *device);
|
|
static int acpi_fan_remove(struct acpi_device *device, int type);
|
|
static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state);
|
|
static int acpi_fan_resume(struct acpi_device *device);
|
|
|
|
static const struct acpi_device_id fan_device_ids[] = {
|
|
{"PNP0C0B", 0},
|
|
{"", 0},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, fan_device_ids);
|
|
|
|
static struct acpi_driver acpi_fan_driver = {
|
|
.name = "fan",
|
|
.class = ACPI_FAN_CLASS,
|
|
.ids = fan_device_ids,
|
|
.ops = {
|
|
.add = acpi_fan_add,
|
|
.remove = acpi_fan_remove,
|
|
.suspend = acpi_fan_suspend,
|
|
.resume = acpi_fan_resume,
|
|
},
|
|
};
|
|
|
|
/* thermal cooling device callbacks */
|
|
static int fan_get_max_state(struct thermal_cooling_device *cdev, char *buf)
|
|
{
|
|
/* ACPI fan device only support two states: ON/OFF */
|
|
return sprintf(buf, "1\n");
|
|
}
|
|
|
|
static int fan_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
|
|
{
|
|
struct acpi_device *device = cdev->devdata;
|
|
int state;
|
|
int result;
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
result = acpi_bus_get_power(device->handle, &state);
|
|
if (result)
|
|
return result;
|
|
|
|
return sprintf(buf, "%s\n", state == ACPI_STATE_D3 ? "0" :
|
|
(state == ACPI_STATE_D0 ? "1" : "unknown"));
|
|
}
|
|
|
|
static int
|
|
fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
|
|
{
|
|
struct acpi_device *device = cdev->devdata;
|
|
int result;
|
|
|
|
if (!device || (state != 0 && state != 1))
|
|
return -EINVAL;
|
|
|
|
result = acpi_bus_set_power(device->handle,
|
|
state ? ACPI_STATE_D0 : ACPI_STATE_D3);
|
|
|
|
return result;
|
|
}
|
|
|
|
static struct thermal_cooling_device_ops fan_cooling_ops = {
|
|
.get_max_state = fan_get_max_state,
|
|
.get_cur_state = fan_get_cur_state,
|
|
.set_cur_state = fan_set_cur_state,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------------
|
|
FS Interface (/proc)
|
|
-------------------------------------------------------------------------- */
|
|
#ifdef CONFIG_ACPI_PROCFS
|
|
|
|
static struct proc_dir_entry *acpi_fan_dir;
|
|
|
|
static int acpi_fan_read_state(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_device *device = seq->private;
|
|
int state = 0;
|
|
|
|
|
|
if (device) {
|
|
if (acpi_bus_get_power(device->handle, &state))
|
|
seq_printf(seq, "status: ERROR\n");
|
|
else
|
|
seq_printf(seq, "status: %s\n",
|
|
!state ? "on" : "off");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_fan_state_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_fan_read_state, PDE(inode)->data);
|
|
}
|
|
|
|
static ssize_t
|
|
acpi_fan_write_state(struct file *file, const char __user * buffer,
|
|
size_t count, loff_t * ppos)
|
|
{
|
|
int result = 0;
|
|
struct seq_file *m = file->private_data;
|
|
struct acpi_device *device = m->private;
|
|
char state_string[12] = { '\0' };
|
|
|
|
if (count > sizeof(state_string) - 1)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(state_string, buffer, count))
|
|
return -EFAULT;
|
|
|
|
state_string[count] = '\0';
|
|
|
|
result = acpi_bus_set_power(device->handle,
|
|
simple_strtoul(state_string, NULL, 0));
|
|
if (result)
|
|
return result;
|
|
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations acpi_fan_state_ops = {
|
|
.open = acpi_fan_state_open_fs,
|
|
.read = seq_read,
|
|
.write = acpi_fan_write_state,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int acpi_fan_add_fs(struct acpi_device *device)
|
|
{
|
|
struct proc_dir_entry *entry = NULL;
|
|
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
if (!acpi_device_dir(device)) {
|
|
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
|
|
acpi_fan_dir);
|
|
if (!acpi_device_dir(device))
|
|
return -ENODEV;
|
|
acpi_device_dir(device)->owner = THIS_MODULE;
|
|
}
|
|
|
|
/* 'status' [R/W] */
|
|
entry = proc_create_data(ACPI_FAN_FILE_STATE,
|
|
S_IFREG | S_IRUGO | S_IWUSR,
|
|
acpi_device_dir(device),
|
|
&acpi_fan_state_ops,
|
|
device);
|
|
if (!entry)
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_fan_remove_fs(struct acpi_device *device)
|
|
{
|
|
|
|
if (acpi_device_dir(device)) {
|
|
remove_proc_entry(ACPI_FAN_FILE_STATE, acpi_device_dir(device));
|
|
remove_proc_entry(acpi_device_bid(device), acpi_fan_dir);
|
|
acpi_device_dir(device) = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static int acpi_fan_add_fs(struct acpi_device *device)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_fan_remove_fs(struct acpi_device *device)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
/* --------------------------------------------------------------------------
|
|
Driver Interface
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int acpi_fan_add(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
int state = 0;
|
|
struct thermal_cooling_device *cdev;
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
strcpy(acpi_device_name(device), "Fan");
|
|
strcpy(acpi_device_class(device), ACPI_FAN_CLASS);
|
|
|
|
result = acpi_bus_get_power(device->handle, &state);
|
|
if (result) {
|
|
printk(KERN_ERR PREFIX "Reading power state\n");
|
|
goto end;
|
|
}
|
|
|
|
device->flags.force_power_state = 1;
|
|
acpi_bus_set_power(device->handle, state);
|
|
device->flags.force_power_state = 0;
|
|
|
|
cdev = thermal_cooling_device_register("Fan", device,
|
|
&fan_cooling_ops);
|
|
if (IS_ERR(cdev)) {
|
|
result = PTR_ERR(cdev);
|
|
goto end;
|
|
}
|
|
|
|
printk(KERN_INFO PREFIX
|
|
"%s is registered as cooling_device%d\n",
|
|
device->dev.bus_id, cdev->id);
|
|
|
|
acpi_driver_data(device) = cdev;
|
|
result = sysfs_create_link(&device->dev.kobj,
|
|
&cdev->device.kobj,
|
|
"thermal_cooling");
|
|
if (result)
|
|
printk(KERN_ERR PREFIX "Create sysfs link\n");
|
|
|
|
result = sysfs_create_link(&cdev->device.kobj,
|
|
&device->dev.kobj,
|
|
"device");
|
|
if (result)
|
|
printk(KERN_ERR PREFIX "Create sysfs link\n");
|
|
|
|
result = acpi_fan_add_fs(device);
|
|
if (result)
|
|
goto end;
|
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
|
|
acpi_device_name(device), acpi_device_bid(device),
|
|
!device->power.state ? "on" : "off");
|
|
|
|
end:
|
|
return result;
|
|
}
|
|
|
|
static int acpi_fan_remove(struct acpi_device *device, int type)
|
|
{
|
|
struct thermal_cooling_device *cdev = acpi_driver_data(device);
|
|
|
|
if (!device || !cdev)
|
|
return -EINVAL;
|
|
|
|
acpi_fan_remove_fs(device);
|
|
sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
|
|
sysfs_remove_link(&cdev->device.kobj, "device");
|
|
thermal_cooling_device_unregister(cdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state)
|
|
{
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
acpi_bus_set_power(device->handle, ACPI_STATE_D0);
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
static int acpi_fan_resume(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
int power_state = 0;
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
result = acpi_bus_get_power(device->handle, &power_state);
|
|
if (result) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error reading fan power state\n"));
|
|
return result;
|
|
}
|
|
|
|
device->flags.force_power_state = 1;
|
|
acpi_bus_set_power(device->handle, power_state);
|
|
device->flags.force_power_state = 0;
|
|
|
|
return result;
|
|
}
|
|
|
|
static int __init acpi_fan_init(void)
|
|
{
|
|
int result = 0;
|
|
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS
|
|
acpi_fan_dir = proc_mkdir(ACPI_FAN_CLASS, acpi_root_dir);
|
|
if (!acpi_fan_dir)
|
|
return -ENODEV;
|
|
acpi_fan_dir->owner = THIS_MODULE;
|
|
#endif
|
|
|
|
result = acpi_bus_register_driver(&acpi_fan_driver);
|
|
if (result < 0) {
|
|
remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit acpi_fan_exit(void)
|
|
{
|
|
|
|
acpi_bus_unregister_driver(&acpi_fan_driver);
|
|
|
|
remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);
|
|
|
|
return;
|
|
}
|
|
|
|
module_init(acpi_fan_init);
|
|
module_exit(acpi_fan_exit);
|