diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/acpi/Makefile | 1 | ||||
| -rw-r--r-- | drivers/acpi/hed.c | 112 |
3 files changed, 120 insertions, 0 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 191cf2bf408c..746411518802 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -360,6 +360,13 @@ config ACPI_SBS To compile this driver as a module, choose M here: the modules will be called sbs and sbshc. +config ACPI_HED + tristate "Hardware Error Device" + help + This driver supports the Hardware Error Device (PNP0C33), + which is used to report some hardware errors notified via + SCI, mainly the corrected errors. + source "drivers/acpi/apei/Kconfig" endif # ACPI diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index e7cd919548e9..6ee33169e1dc 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -59,6 +59,7 @@ obj-$(CONFIG_ACPI_BATTERY) += battery.o obj-$(CONFIG_ACPI_SBS) += sbshc.o obj-$(CONFIG_ACPI_SBS) += sbs.o obj-$(CONFIG_ACPI_POWER_METER) += power_meter.o +obj-$(CONFIG_ACPI_HED) += hed.o # processor has its own "processor." module_param namespace processor-y := processor_driver.o processor_throttling.o diff --git a/drivers/acpi/hed.c b/drivers/acpi/hed.c new file mode 100644 index 000000000000..d0c1967f7597 --- /dev/null +++ b/drivers/acpi/hed.c @@ -0,0 +1,112 @@ +/* + * 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"); |