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HID: Add support for side buttons of Xiaomi Mi Dual Mode Wireless Mou…
…se Silent This patch enables side-buttons of Xiaomi Bluetooth mouse (specifically Xiaomi Mi Dual Mode Wireless Mouse Silent Edition). The mouse sends invalid button count in its HID Report Descriptor and this patch just replaces its descriptor with corrected one. With this driver side buttons work as expected acting like Back/Forward buttons. Signed-off-by: Ilya Skriblovsky <ilyaskriblovsky@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Ilya Skriblovsky
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Jiri Kosina
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Sep 22, 2021
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,94 @@ | ||
| // SPDX-License-Identifier: GPL-2.0 | ||
| /* | ||
| * HID driver for Xiaomi Mi Dual Mode Wireless Mouse Silent Edition | ||
| * | ||
| * Copyright (c) 2021 Ilya Skriblovsky | ||
| */ | ||
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| #include <linux/init.h> | ||
| #include <linux/module.h> | ||
| #include <linux/hid.h> | ||
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| #include "hid-ids.h" | ||
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| /* Fixed Mi Silent Mouse report descriptor */ | ||
| /* Button's Usage Maximum changed from 3 to 5 to make side buttons work */ | ||
| #define MI_SILENT_MOUSE_ORIG_RDESC_LENGTH 87 | ||
| static __u8 mi_silent_mouse_rdesc_fixed[] = { | ||
| 0x05, 0x01, /* Usage Page (Desktop), */ | ||
| 0x09, 0x02, /* Usage (Mouse), */ | ||
| 0xA1, 0x01, /* Collection (Application), */ | ||
| 0x85, 0x03, /* Report ID (3), */ | ||
| 0x09, 0x01, /* Usage (Pointer), */ | ||
| 0xA1, 0x00, /* Collection (Physical), */ | ||
| 0x05, 0x09, /* Usage Page (Button), */ | ||
| 0x19, 0x01, /* Usage Minimum (01h), */ | ||
| 0x29, 0x05, /* X */ /* Usage Maximum (05h), */ | ||
| 0x15, 0x00, /* Logical Minimum (0), */ | ||
| 0x25, 0x01, /* Logical Maximum (1), */ | ||
| 0x75, 0x01, /* Report Size (1), */ | ||
| 0x95, 0x05, /* Report Count (5), */ | ||
| 0x81, 0x02, /* Input (Variable), */ | ||
| 0x75, 0x03, /* Report Size (3), */ | ||
| 0x95, 0x01, /* Report Count (1), */ | ||
| 0x81, 0x01, /* Input (Constant), */ | ||
| 0x05, 0x01, /* Usage Page (Desktop), */ | ||
| 0x09, 0x30, /* Usage (X), */ | ||
| 0x09, 0x31, /* Usage (Y), */ | ||
| 0x15, 0x81, /* Logical Minimum (-127), */ | ||
| 0x25, 0x7F, /* Logical Maximum (127), */ | ||
| 0x75, 0x08, /* Report Size (8), */ | ||
| 0x95, 0x02, /* Report Count (2), */ | ||
| 0x81, 0x06, /* Input (Variable, Relative), */ | ||
| 0x09, 0x38, /* Usage (Wheel), */ | ||
| 0x15, 0x81, /* Logical Minimum (-127), */ | ||
| 0x25, 0x7F, /* Logical Maximum (127), */ | ||
| 0x75, 0x08, /* Report Size (8), */ | ||
| 0x95, 0x01, /* Report Count (1), */ | ||
| 0x81, 0x06, /* Input (Variable, Relative), */ | ||
| 0xC0, /* End Collection, */ | ||
| 0xC0, /* End Collection, */ | ||
| 0x06, 0x01, 0xFF, /* Usage Page (FF01h), */ | ||
| 0x09, 0x01, /* Usage (01h), */ | ||
| 0xA1, 0x01, /* Collection (Application), */ | ||
| 0x85, 0x05, /* Report ID (5), */ | ||
| 0x09, 0x05, /* Usage (05h), */ | ||
| 0x15, 0x00, /* Logical Minimum (0), */ | ||
| 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ | ||
| 0x75, 0x08, /* Report Size (8), */ | ||
| 0x95, 0x04, /* Report Count (4), */ | ||
| 0xB1, 0x02, /* Feature (Variable), */ | ||
| 0xC0 /* End Collection */ | ||
| }; | ||
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| static __u8 *xiaomi_report_fixup(struct hid_device *hdev, __u8 *rdesc, | ||
| unsigned int *rsize) | ||
| { | ||
| switch (hdev->product) { | ||
| case USB_DEVICE_ID_MI_SILENT_MOUSE: | ||
| if (*rsize == MI_SILENT_MOUSE_ORIG_RDESC_LENGTH) { | ||
| hid_info(hdev, "fixing up Mi Silent Mouse report descriptor\n"); | ||
| rdesc = mi_silent_mouse_rdesc_fixed; | ||
| *rsize = sizeof(mi_silent_mouse_rdesc_fixed); | ||
| } | ||
| break; | ||
| } | ||
| return rdesc; | ||
| } | ||
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| static const struct hid_device_id xiaomi_devices[] = { | ||
| { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_XIAOMI, USB_DEVICE_ID_MI_SILENT_MOUSE) }, | ||
| { } | ||
| }; | ||
| MODULE_DEVICE_TABLE(hid, xiaomi_devices); | ||
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| static struct hid_driver xiaomi_driver = { | ||
| .name = "xiaomi", | ||
| .id_table = xiaomi_devices, | ||
| .report_fixup = xiaomi_report_fixup, | ||
| }; | ||
| module_hid_driver(xiaomi_driver); | ||
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| MODULE_LICENSE("GPL"); | ||
| MODULE_AUTHOR("Ilya Skriblovsky <IlyaSkriblovsky@gmail.com>"); | ||
| MODULE_DESCRIPTION("Fixing side buttons of Xiaomi Mi Silent Mouse"); |