/* * 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 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 acpi_hed_remove(struct acpi_device *device) { 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, }, }; module_acpi_driver(acpi_hed_driver); ACPI_MODULE_NAME("hed"); MODULE_AUTHOR("Huang Ying"); MODULE_DESCRIPTION("ACPI Hardware Error Device Driver"); MODULE_LICENSE("GPL");