^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * WMI hotkeys support for Dell All-In-One series
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/input/sparse-keymap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) MODULE_DESCRIPTION("WMI hotkeys driver for Dell All-In-One series");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define EVENT_GUID1 "284A0E6B-380E-472A-921F-E52786257FB4"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define EVENT_GUID2 "02314822-307C-4F66-BF0E-48AEAEB26CC8"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct dell_wmi_event {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) u16 length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* 0x000: A hot key pressed or an event occurred
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * 0x00F: A sequence of hot keys are pressed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) u16 type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) u16 event[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static const char *dell_wmi_aio_guids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) EVENT_GUID1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) EVENT_GUID2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) MODULE_ALIAS("wmi:"EVENT_GUID1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) MODULE_ALIAS("wmi:"EVENT_GUID2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static const struct key_entry dell_wmi_aio_keymap[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) { KE_KEY, 0xc0, { KEY_VOLUMEUP } },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) { KE_KEY, 0xc1, { KEY_VOLUMEDOWN } },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) { KE_KEY, 0xe030, { KEY_VOLUMEUP } },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) { KE_KEY, 0xe02e, { KEY_VOLUMEDOWN } },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) { KE_KEY, 0xe020, { KEY_MUTE } },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) { KE_KEY, 0xe027, { KEY_DISPLAYTOGGLE } },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) { KE_KEY, 0xe006, { KEY_BRIGHTNESSUP } },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) { KE_KEY, 0xe005, { KEY_BRIGHTNESSDOWN } },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) { KE_KEY, 0xe00b, { KEY_SWITCHVIDEOMODE } },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) { KE_END, 0 }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static struct input_dev *dell_wmi_aio_input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * The new WMI event data format will follow the dell_wmi_event structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * So, we will check if the buffer matches the format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static bool dell_wmi_aio_event_check(u8 *buffer, int length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct dell_wmi_event *event = (struct dell_wmi_event *)buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (event == NULL || length < 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if ((event->type == 0 || event->type == 0xf) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) event->length >= 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static void dell_wmi_aio_notify(u32 value, void *context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) union acpi_object *obj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct dell_wmi_event *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) status = wmi_get_event_data(value, &response);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (status != AE_OK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) pr_info("bad event status 0x%x\n", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) obj = (union acpi_object *)response.pointer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (obj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) unsigned int scancode = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) switch (obj->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) case ACPI_TYPE_INTEGER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /* Most All-In-One correctly return integer scancode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) scancode = obj->integer.value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) sparse_keymap_report_event(dell_wmi_aio_input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) scancode, 1, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) case ACPI_TYPE_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (dell_wmi_aio_event_check(obj->buffer.pointer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) obj->buffer.length)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) event = (struct dell_wmi_event *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) obj->buffer.pointer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) scancode = event->event[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /* Broken machines return the scancode in a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (obj->buffer.pointer &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) obj->buffer.length > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) scancode = obj->buffer.pointer[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (scancode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) sparse_keymap_report_event(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) dell_wmi_aio_input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) scancode, 1, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) kfree(obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static int __init dell_wmi_aio_input_setup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) dell_wmi_aio_input_dev = input_allocate_device();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (!dell_wmi_aio_input_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) dell_wmi_aio_input_dev->name = "Dell AIO WMI hotkeys";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) dell_wmi_aio_input_dev->phys = "wmi/input0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) dell_wmi_aio_input_dev->id.bustype = BUS_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) err = sparse_keymap_setup(dell_wmi_aio_input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) dell_wmi_aio_keymap, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) pr_err("Unable to setup input device keymap\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) goto err_free_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) err = input_register_device(dell_wmi_aio_input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) pr_info("Unable to register input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) goto err_free_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) err_free_dev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) input_free_device(dell_wmi_aio_input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static const char *dell_wmi_aio_find(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) for (i = 0; dell_wmi_aio_guids[i] != NULL; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (wmi_has_guid(dell_wmi_aio_guids[i]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return dell_wmi_aio_guids[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static int __init dell_wmi_aio_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) const char *guid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) guid = dell_wmi_aio_find();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (!guid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) pr_warn("No known WMI GUID found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) err = dell_wmi_aio_input_setup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) err = wmi_install_notify_handler(guid, dell_wmi_aio_notify, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) pr_err("Unable to register notify handler - %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) input_unregister_device(dell_wmi_aio_input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static void __exit dell_wmi_aio_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) const char *guid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) guid = dell_wmi_aio_find();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) wmi_remove_notify_handler(guid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) input_unregister_device(dell_wmi_aio_input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) module_init(dell_wmi_aio_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) module_exit(dell_wmi_aio_exit);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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