diff options
Diffstat (limited to 'drivers/platform/x86/dell-wmi-aio.c')
| -rw-r--r-- | drivers/platform/x86/dell-wmi-aio.c | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/drivers/platform/x86/dell-wmi-aio.c b/drivers/platform/x86/dell-wmi-aio.c deleted file mode 100644 index c7b7f1e403fb..000000000000 --- a/drivers/platform/x86/dell-wmi-aio.c +++ /dev/null @@ -1,197 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * WMI hotkeys support for Dell All-In-One series - */ - -#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/input.h> -#include <linux/input/sparse-keymap.h> -#include <linux/acpi.h> -#include <linux/string.h> - -MODULE_DESCRIPTION("WMI hotkeys driver for Dell All-In-One series"); -MODULE_LICENSE("GPL"); - -#define EVENT_GUID1 "284A0E6B-380E-472A-921F-E52786257FB4" -#define EVENT_GUID2 "02314822-307C-4F66-BF0E-48AEAEB26CC8" - -struct dell_wmi_event { - u16 length; - /* 0x000: A hot key pressed or an event occurred - * 0x00F: A sequence of hot keys are pressed */ - u16 type; - u16 event[]; -}; - -static const char *dell_wmi_aio_guids[] = { - EVENT_GUID1, - EVENT_GUID2, - NULL -}; - -MODULE_ALIAS("wmi:"EVENT_GUID1); -MODULE_ALIAS("wmi:"EVENT_GUID2); - -static const struct key_entry dell_wmi_aio_keymap[] = { - { KE_KEY, 0xc0, { KEY_VOLUMEUP } }, - { KE_KEY, 0xc1, { KEY_VOLUMEDOWN } }, - { KE_KEY, 0xe030, { KEY_VOLUMEUP } }, - { KE_KEY, 0xe02e, { KEY_VOLUMEDOWN } }, - { KE_KEY, 0xe020, { KEY_MUTE } }, - { KE_KEY, 0xe027, { KEY_DISPLAYTOGGLE } }, - { KE_KEY, 0xe006, { KEY_BRIGHTNESSUP } }, - { KE_KEY, 0xe005, { KEY_BRIGHTNESSDOWN } }, - { KE_KEY, 0xe00b, { KEY_SWITCHVIDEOMODE } }, - { KE_END, 0 } -}; - -static struct input_dev *dell_wmi_aio_input_dev; - -/* - * The new WMI event data format will follow the dell_wmi_event structure - * So, we will check if the buffer matches the format - */ -static bool dell_wmi_aio_event_check(u8 *buffer, int length) -{ - struct dell_wmi_event *event = (struct dell_wmi_event *)buffer; - - if (event == NULL || length < 6) - return false; - - if ((event->type == 0 || event->type == 0xf) && - event->length >= 2) - return true; - - return false; -} - -static void dell_wmi_aio_notify(u32 value, void *context) -{ - struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; - struct dell_wmi_event *event; - acpi_status status; - - status = wmi_get_event_data(value, &response); - if (status != AE_OK) { - pr_info("bad event status 0x%x\n", status); - return; - } - - obj = (union acpi_object *)response.pointer; - if (obj) { - unsigned int scancode = 0; - - switch (obj->type) { - case ACPI_TYPE_INTEGER: - /* Most All-In-One correctly return integer scancode */ - scancode = obj->integer.value; - sparse_keymap_report_event(dell_wmi_aio_input_dev, - scancode, 1, true); - break; - case ACPI_TYPE_BUFFER: - if (dell_wmi_aio_event_check(obj->buffer.pointer, - obj->buffer.length)) { - event = (struct dell_wmi_event *) - obj->buffer.pointer; - scancode = event->event[0]; - } else { - /* Broken machines return the scancode in a - buffer */ - if (obj->buffer.pointer && - obj->buffer.length > 0) - scancode = obj->buffer.pointer[0]; - } - if (scancode) - sparse_keymap_report_event( - dell_wmi_aio_input_dev, - scancode, 1, true); - break; - } - } - kfree(obj); -} - -static int __init dell_wmi_aio_input_setup(void) -{ - int err; - - dell_wmi_aio_input_dev = input_allocate_device(); - - if (!dell_wmi_aio_input_dev) - return -ENOMEM; - - dell_wmi_aio_input_dev->name = "Dell AIO WMI hotkeys"; - dell_wmi_aio_input_dev->phys = "wmi/input0"; - dell_wmi_aio_input_dev->id.bustype = BUS_HOST; - - err = sparse_keymap_setup(dell_wmi_aio_input_dev, - dell_wmi_aio_keymap, NULL); - if (err) { - pr_err("Unable to setup input device keymap\n"); - goto err_free_dev; - } - err = input_register_device(dell_wmi_aio_input_dev); - if (err) { - pr_info("Unable to register input device\n"); - goto err_free_dev; - } - return 0; - -err_free_dev: - input_free_device(dell_wmi_aio_input_dev); - return err; -} - -static const char *dell_wmi_aio_find(void) -{ - int i; - - for (i = 0; dell_wmi_aio_guids[i] != NULL; i++) - if (wmi_has_guid(dell_wmi_aio_guids[i])) - return dell_wmi_aio_guids[i]; - - return NULL; -} - -static int __init dell_wmi_aio_init(void) -{ - int err; - const char *guid; - - guid = dell_wmi_aio_find(); - if (!guid) { - pr_warn("No known WMI GUID found\n"); - return -ENXIO; - } - - err = dell_wmi_aio_input_setup(); - if (err) - return err; - - err = wmi_install_notify_handler(guid, dell_wmi_aio_notify, NULL); - if (err) { - pr_err("Unable to register notify handler - %d\n", err); - input_unregister_device(dell_wmi_aio_input_dev); - return err; - } - - return 0; -} - -static void __exit dell_wmi_aio_exit(void) -{ - const char *guid; - - guid = dell_wmi_aio_find(); - wmi_remove_notify_handler(guid); - input_unregister_device(dell_wmi_aio_input_dev); -} - -module_init(dell_wmi_aio_init); -module_exit(dell_wmi_aio_exit); |