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