Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Colin Ian King | 558 | 73.23% | 1 | 20.00% |
AceLan Kao | 200 | 26.25% | 1 | 20.00% |
Thomas Gleixner | 2 | 0.26% | 1 | 20.00% |
Michał Kępień | 1 | 0.13% | 1 | 20.00% |
Joe Perches | 1 | 0.13% | 1 | 20.00% |
Total | 762 | 5 |
// 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);
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