113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/*
|
|
* ACPI Hardware Error Device (PNP0C33) Driver
|
|
*
|
|
* Copyright (C) 2010, Intel Corp.
|
|
* Author: Huang Ying <ying.huang@intel.com>
|
|
*
|
|
* ACPI Hardware Error Device is used to report some hardware errors
|
|
* notified via SCI, mainly the corrected errors.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version
|
|
* 2 as published by the Free Software Foundation;
|
|
*
|
|
* 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/acpi.h>
|
|
#include <acpi/acpi_bus.h>
|
|
#include <acpi/acpi_drivers.h>
|
|
#include <acpi/hed.h>
|
|
|
|
static struct acpi_device_id acpi_hed_ids[] = {
|
|
{"PNP0C33", 0},
|
|
{"", 0},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, acpi_hed_ids);
|
|
|
|
static acpi_handle hed_handle;
|
|
|
|
static BLOCKING_NOTIFIER_HEAD(acpi_hed_notify_list);
|
|
|
|
int register_acpi_hed_notifier(struct notifier_block *nb)
|
|
{
|
|
return blocking_notifier_chain_register(&acpi_hed_notify_list, nb);
|
|
}
|
|
EXPORT_SYMBOL_GPL(register_acpi_hed_notifier);
|
|
|
|
void unregister_acpi_hed_notifier(struct notifier_block *nb)
|
|
{
|
|
blocking_notifier_chain_unregister(&acpi_hed_notify_list, nb);
|
|
}
|
|
EXPORT_SYMBOL_GPL(unregister_acpi_hed_notifier);
|
|
|
|
/*
|
|
* SCI to report hardware error is forwarded to the listeners of HED,
|
|
* it is used by HEST Generic Hardware Error Source with notify type
|
|
* SCI.
|
|
*/
|
|
static void acpi_hed_notify(struct acpi_device *device, u32 event)
|
|
{
|
|
blocking_notifier_call_chain(&acpi_hed_notify_list, 0, NULL);
|
|
}
|
|
|
|
static int __devinit acpi_hed_add(struct acpi_device *device)
|
|
{
|
|
/* Only one hardware error device */
|
|
if (hed_handle)
|
|
return -EINVAL;
|
|
hed_handle = device->handle;
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit acpi_hed_remove(struct acpi_device *device, int type)
|
|
{
|
|
hed_handle = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static struct acpi_driver acpi_hed_driver = {
|
|
.name = "hardware_error_device",
|
|
.class = "hardware_error",
|
|
.ids = acpi_hed_ids,
|
|
.ops = {
|
|
.add = acpi_hed_add,
|
|
.remove = acpi_hed_remove,
|
|
.notify = acpi_hed_notify,
|
|
},
|
|
};
|
|
|
|
static int __init acpi_hed_init(void)
|
|
{
|
|
if (acpi_disabled)
|
|
return -ENODEV;
|
|
|
|
if (acpi_bus_register_driver(&acpi_hed_driver) < 0)
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit acpi_hed_exit(void)
|
|
{
|
|
acpi_bus_unregister_driver(&acpi_hed_driver);
|
|
}
|
|
|
|
module_init(acpi_hed_init);
|
|
module_exit(acpi_hed_exit);
|
|
|
|
ACPI_MODULE_NAME("hed");
|
|
MODULE_AUTHOR("Huang Ying");
|
|
MODULE_DESCRIPTION("ACPI Hardware Error Device Driver");
|
|
MODULE_LICENSE("GPL");
|