diff options
Diffstat (limited to 'drivers/platform/x86/pvpanic.c')
-rw-r--r-- | drivers/platform/x86/pvpanic.c | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/drivers/platform/x86/pvpanic.c b/drivers/platform/x86/pvpanic.c deleted file mode 100644 index fd86daba7ffd..000000000000 --- a/drivers/platform/x86/pvpanic.c +++ /dev/null @@ -1,124 +0,0 @@ -/* - * pvpanic.c - pvpanic Device Support - * - * Copyright (C) 2013 Fujitsu. - * - * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/acpi.h> - -MODULE_AUTHOR("Hu Tao <hutao@cn.fujitsu.com>"); -MODULE_DESCRIPTION("pvpanic device driver"); -MODULE_LICENSE("GPL"); - -static int pvpanic_add(struct acpi_device *device); -static int pvpanic_remove(struct acpi_device *device); - -static const struct acpi_device_id pvpanic_device_ids[] = { - { "QEMU0001", 0 }, - { "", 0 }, -}; -MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids); - -#define PVPANIC_PANICKED (1 << 0) - -static u16 port; - -static struct acpi_driver pvpanic_driver = { - .name = "pvpanic", - .class = "QEMU", - .ids = pvpanic_device_ids, - .ops = { - .add = pvpanic_add, - .remove = pvpanic_remove, - }, - .owner = THIS_MODULE, -}; - -static void -pvpanic_send_event(unsigned int event) -{ - outb(event, port); -} - -static int -pvpanic_panic_notify(struct notifier_block *nb, unsigned long code, - void *unused) -{ - pvpanic_send_event(PVPANIC_PANICKED); - return NOTIFY_DONE; -} - -static struct notifier_block pvpanic_panic_nb = { - .notifier_call = pvpanic_panic_notify, - .priority = 1, /* let this called before broken drm_fb_helper */ -}; - - -static acpi_status -pvpanic_walk_resources(struct acpi_resource *res, void *context) -{ - switch (res->type) { - case ACPI_RESOURCE_TYPE_END_TAG: - return AE_OK; - - case ACPI_RESOURCE_TYPE_IO: - port = res->data.io.minimum; - return AE_OK; - - default: - return AE_ERROR; - } -} - -static int pvpanic_add(struct acpi_device *device) -{ - int ret; - - ret = acpi_bus_get_status(device); - if (ret < 0) - return ret; - - if (!device->status.enabled || !device->status.functional) - return -ENODEV; - - acpi_walk_resources(device->handle, METHOD_NAME__CRS, - pvpanic_walk_resources, NULL); - - if (!port) - return -ENODEV; - - atomic_notifier_chain_register(&panic_notifier_list, - &pvpanic_panic_nb); - - return 0; -} - -static int pvpanic_remove(struct acpi_device *device) -{ - - atomic_notifier_chain_unregister(&panic_notifier_list, - &pvpanic_panic_nb); - return 0; -} - -module_acpi_driver(pvpanic_driver); |