113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
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/*
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* ACPI Hardware Error Device (PNP0C33) Driver
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*
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* Copyright (C) 2010, Intel Corp.
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* Author: Huang Ying <ying.huang@intel.com>
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*
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* ACPI Hardware Error Device is used to report some hardware errors
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* notified via SCI, mainly the corrected errors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/acpi.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#include <acpi/hed.h>
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static struct acpi_device_id acpi_hed_ids[] = {
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{"PNP0C33", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, acpi_hed_ids);
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static acpi_handle hed_handle;
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static BLOCKING_NOTIFIER_HEAD(acpi_hed_notify_list);
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int register_acpi_hed_notifier(struct notifier_block *nb)
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{
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return blocking_notifier_chain_register(&acpi_hed_notify_list, nb);
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}
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EXPORT_SYMBOL_GPL(register_acpi_hed_notifier);
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void unregister_acpi_hed_notifier(struct notifier_block *nb)
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{
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blocking_notifier_chain_unregister(&acpi_hed_notify_list, nb);
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}
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EXPORT_SYMBOL_GPL(unregister_acpi_hed_notifier);
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/*
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* SCI to report hardware error is forwarded to the listeners of HED,
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* it is used by HEST Generic Hardware Error Source with notify type
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* SCI.
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*/
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static void acpi_hed_notify(struct acpi_device *device, u32 event)
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{
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blocking_notifier_call_chain(&acpi_hed_notify_list, 0, NULL);
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}
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static int __devinit acpi_hed_add(struct acpi_device *device)
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{
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/* Only one hardware error device */
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if (hed_handle)
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return -EINVAL;
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hed_handle = device->handle;
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return 0;
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}
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static int __devexit acpi_hed_remove(struct acpi_device *device, int type)
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{
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hed_handle = NULL;
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return 0;
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}
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static struct acpi_driver acpi_hed_driver = {
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.name = "hardware_error_device",
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.class = "hardware_error",
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.ids = acpi_hed_ids,
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.ops = {
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.add = acpi_hed_add,
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.remove = acpi_hed_remove,
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.notify = acpi_hed_notify,
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},
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};
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static int __init acpi_hed_init(void)
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{
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if (acpi_disabled)
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return -ENODEV;
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if (acpi_bus_register_driver(&acpi_hed_driver) < 0)
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return -ENODEV;
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return 0;
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}
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static void __exit acpi_hed_exit(void)
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{
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acpi_bus_unregister_driver(&acpi_hed_driver);
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}
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module_init(acpi_hed_init);
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module_exit(acpi_hed_exit);
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ACPI_MODULE_NAME("hed");
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MODULE_AUTHOR("Huang Ying");
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MODULE_DESCRIPTION("ACPI Hardware Error Device Driver");
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MODULE_LICENSE("GPL");
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