91 lines
3.5 KiB
C
91 lines
3.5 KiB
C
/*
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* HID driver for ELECOM devices.
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* Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
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* Copyright (c) 2016 Yuxuan Shui <yshuiv7@gmail.com>
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* Copyright (c) 2017 Diego Elio Pettenò <flameeyes@flameeyes.eu>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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static __u8 *elecom_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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unsigned int *rsize)
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{
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switch (hdev->product) {
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case USB_DEVICE_ID_ELECOM_BM084:
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/* The BM084 Bluetooth mouse includes a non-existing horizontal
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* wheel in the HID descriptor. */
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if (*rsize >= 48 && rdesc[46] == 0x05 && rdesc[47] == 0x0c) {
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hid_info(hdev, "Fixing up Elecom BM084 report descriptor\n");
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rdesc[47] = 0x00;
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}
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break;
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case USB_DEVICE_ID_ELECOM_DEFT_WIRED:
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case USB_DEVICE_ID_ELECOM_DEFT_WIRELESS:
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/* The DEFT trackball has eight buttons, but its descriptor only
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* reports five, disabling the three Fn buttons on the top of
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* the mouse.
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*
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* Apply the following diff to the descriptor:
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*
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* Collection (Physical), Collection (Physical),
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* Report ID (1), Report ID (1),
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* Report Count (5), -> Report Count (8),
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* Report Size (1), Report Size (1),
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* Usage Page (Button), Usage Page (Button),
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* Usage Minimum (01h), Usage Minimum (01h),
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* Usage Maximum (05h), -> Usage Maximum (08h),
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* Logical Minimum (0), Logical Minimum (0),
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* Logical Maximum (1), Logical Maximum (1),
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* Input (Variable), Input (Variable),
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* Report Count (1), -> Report Count (0),
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* Report Size (3), Report Size (3),
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* Input (Constant), Input (Constant),
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* Report Size (16), Report Size (16),
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* Report Count (2), Report Count (2),
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* Usage Page (Desktop), Usage Page (Desktop),
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* Usage (X), Usage (X),
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* Usage (Y), Usage (Y),
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* Logical Minimum (-32768), Logical Minimum (-32768),
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* Logical Maximum (32767), Logical Maximum (32767),
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* Input (Variable, Relative), Input (Variable, Relative),
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* End Collection, End Collection,
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*/
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if (*rsize == 213 && rdesc[13] == 5 && rdesc[21] == 5) {
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hid_info(hdev, "Fixing up Elecom DEFT Fn buttons\n");
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rdesc[13] = 8; /* Button/Variable Report Count */
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rdesc[21] = 8; /* Button/Variable Usage Maximum */
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rdesc[29] = 0; /* Button/Constant Report Count */
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}
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break;
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}
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return rdesc;
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}
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static const struct hid_device_id elecom_devices[] = {
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_DEFT_WIRED) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_DEFT_WIRELESS) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, elecom_devices);
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static struct hid_driver elecom_driver = {
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.name = "elecom",
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.id_table = elecom_devices,
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.report_fixup = elecom_report_fixup
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};
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module_hid_driver(elecom_driver);
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MODULE_LICENSE("GPL");
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