92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* HID driver for VRC-2 2-axis Car controller
|
||
|
|
*
|
||
|
|
* Copyright (C) 2022 Marcus Folkesson <marcus.folkesson@gmail.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/device.h>
|
||
|
|
#include <linux/hid.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* VID/PID are probably "borrowed", so keep them locally and
|
||
|
|
* do not populate hid-ids.h with those.
|
||
|
|
*/
|
||
|
|
#define USB_VENDOR_ID_VRC2 (0x07c0)
|
||
|
|
#define USB_DEVICE_ID_VRC2 (0x1125)
|
||
|
|
|
||
|
|
static __u8 vrc2_rdesc_fixed[] = {
|
||
|
|
0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
|
||
|
|
0x09, 0x04, // Usage (Joystick)
|
||
|
|
0xA1, 0x01, // Collection (Application)
|
||
|
|
0x09, 0x01, // Usage (Pointer)
|
||
|
|
0xA1, 0x00, // Collection (Physical)
|
||
|
|
0x09, 0x30, // Usage (X)
|
||
|
|
0x09, 0x31, // Usage (Y)
|
||
|
|
0x15, 0x00, // Logical Minimum (0)
|
||
|
|
0x26, 0xFF, 0x07, // Logical Maximum (2047)
|
||
|
|
0x35, 0x00, // Physical Minimum (0)
|
||
|
|
0x46, 0xFF, 0x00, // Physical Maximum (255)
|
||
|
|
0x75, 0x10, // Report Size (16)
|
||
|
|
0x95, 0x02, // Report Count (2)
|
||
|
|
0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
|
||
|
|
0xC0, // End Collection
|
||
|
|
0x75, 0x08, // Report Size (8)
|
||
|
|
0x95, 0x03, // Report Count (3)
|
||
|
|
0x81, 0x03, // Input (Cnst,Var,Abs)
|
||
|
|
0xC0, // End Collection
|
||
|
|
};
|
||
|
|
|
||
|
|
static __u8 *vrc2_report_fixup(struct hid_device *hdev, __u8 *rdesc,
|
||
|
|
unsigned int *rsize)
|
||
|
|
{
|
||
|
|
hid_info(hdev, "fixing up VRC-2 report descriptor\n");
|
||
|
|
*rsize = sizeof(vrc2_rdesc_fixed);
|
||
|
|
return vrc2_rdesc_fixed;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int vrc2_probe(struct hid_device *hdev, const struct hid_device_id *id)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The device gives us 2 separate USB endpoints.
|
||
|
|
* One of those (the one with report descriptor size of 23) is just bogus so ignore it
|
||
|
|
*/
|
||
|
|
if (hdev->dev_rsize == 23)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
ret = hid_parse(hdev);
|
||
|
|
if (ret) {
|
||
|
|
hid_err(hdev, "parse failed\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
|
||
|
|
if (ret) {
|
||
|
|
hid_err(hdev, "hw start failed\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct hid_device_id vrc2_devices[] = {
|
||
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_VRC2, USB_DEVICE_ID_VRC2) },
|
||
|
|
{ /* sentinel */ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(hid, vrc2_devices);
|
||
|
|
|
||
|
|
static struct hid_driver vrc2_driver = {
|
||
|
|
.name = "vrc2",
|
||
|
|
.id_table = vrc2_devices,
|
||
|
|
.report_fixup = vrc2_report_fixup,
|
||
|
|
.probe = vrc2_probe,
|
||
|
|
};
|
||
|
|
module_hid_driver(vrc2_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Marcus Folkesson <marcus.folkesson@gmail.com>");
|
||
|
|
MODULE_DESCRIPTION("HID driver for VRC-2 2-axis Car controller");
|
||
|
|
MODULE_LICENSE("GPL");
|