mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-14 15:54:15 +08:00
931830aa5c
This gamepad advertise 5 absolute axis while 4 are actually used. The second Z axis shows some garbage, so it has to be ignored by HID. The first Z axis and the Rz one are actually Rx and Ry. Remap them. We could also just remap and ignore the axis in .input_mapping(). I went ahead with .report_fixup() first, so here it is. Reported-by: Orivej Desh <orivej@gmx.fr> Tested-by: Orivej Desh <orivej@gmx.fr> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/*
|
|
* HID driver for Gembird Joypad, "PC Game Controller"
|
|
*
|
|
* Copyright (c) 2015 Red Hat, Inc
|
|
* Copyright (c) 2015 Benjamin Tissoires
|
|
*/
|
|
|
|
/*
|
|
* 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"
|
|
|
|
#define GEMBIRD_START_FAULTY_RDESC 8
|
|
|
|
static const __u8 gembird_jpd_faulty_rdesc[] = {
|
|
0x75, 0x08, /* Report Size (8) */
|
|
0x95, 0x05, /* Report Count (5) */
|
|
0x15, 0x00, /* Logical Minimum (0) */
|
|
0x26, 0xff, 0x00, /* Logical Maximum (255) */
|
|
0x35, 0x00, /* Physical Minimum (0) */
|
|
0x46, 0xff, 0x00, /* Physical Maximum (255) */
|
|
0x09, 0x30, /* Usage (X) */
|
|
0x09, 0x31, /* Usage (Y) */
|
|
0x09, 0x32, /* Usage (Z) */
|
|
0x09, 0x32, /* Usage (Z) */
|
|
0x09, 0x35, /* Usage (Rz) */
|
|
0x81, 0x02, /* Input (Data,Var,Abs) */
|
|
};
|
|
|
|
/*
|
|
* we fix the report descriptor by:
|
|
* - marking the first Z axis as constant (so it is ignored by HID)
|
|
* - assign the original second Z to Rx
|
|
* - assign the original Rz to Ry
|
|
*/
|
|
static const __u8 gembird_jpd_fixed_rdesc[] = {
|
|
0x75, 0x08, /* Report Size (8) */
|
|
0x95, 0x02, /* Report Count (2) */
|
|
0x15, 0x00, /* Logical Minimum (0) */
|
|
0x26, 0xff, 0x00, /* Logical Maximum (255) */
|
|
0x35, 0x00, /* Physical Minimum (0) */
|
|
0x46, 0xff, 0x00, /* Physical Maximum (255) */
|
|
0x09, 0x30, /* Usage (X) */
|
|
0x09, 0x31, /* Usage (Y) */
|
|
0x81, 0x02, /* Input (Data,Var,Abs) */
|
|
0x95, 0x01, /* Report Count (1) */
|
|
0x09, 0x32, /* Usage (Z) */
|
|
0x81, 0x01, /* Input (Cnst,Arr,Abs) */
|
|
0x95, 0x02, /* Report Count (2) */
|
|
0x09, 0x33, /* Usage (Rx) */
|
|
0x09, 0x34, /* Usage (Ry) */
|
|
0x81, 0x02, /* Input (Data,Var,Abs) */
|
|
};
|
|
|
|
static __u8 *gembird_report_fixup(struct hid_device *hdev, __u8 *rdesc,
|
|
unsigned int *rsize)
|
|
{
|
|
__u8 *new_rdesc;
|
|
/* delta_size is > 0 */
|
|
size_t delta_size = sizeof(gembird_jpd_fixed_rdesc) -
|
|
sizeof(gembird_jpd_faulty_rdesc);
|
|
size_t new_size = *rsize + delta_size;
|
|
|
|
if (*rsize >= 31 && !memcmp(&rdesc[GEMBIRD_START_FAULTY_RDESC],
|
|
gembird_jpd_faulty_rdesc,
|
|
sizeof(gembird_jpd_faulty_rdesc))) {
|
|
new_rdesc = devm_kzalloc(&hdev->dev, new_size, GFP_KERNEL);
|
|
if (new_rdesc == NULL)
|
|
return rdesc;
|
|
|
|
dev_info(&hdev->dev,
|
|
"fixing Gembird JPD-DualForce 2 report descriptor.\n");
|
|
|
|
/* start by copying the end of the rdesc */
|
|
memcpy(new_rdesc + delta_size, rdesc, *rsize);
|
|
|
|
/* add the correct beginning */
|
|
memcpy(new_rdesc, rdesc, GEMBIRD_START_FAULTY_RDESC);
|
|
|
|
/* replace the faulty part with the fixed one */
|
|
memcpy(new_rdesc + GEMBIRD_START_FAULTY_RDESC,
|
|
gembird_jpd_fixed_rdesc,
|
|
sizeof(gembird_jpd_fixed_rdesc));
|
|
|
|
*rsize = new_size;
|
|
rdesc = new_rdesc;
|
|
}
|
|
|
|
return rdesc;
|
|
}
|
|
|
|
static const struct hid_device_id gembird_devices[] = {
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_GEMBIRD,
|
|
USB_DEVICE_ID_GEMBIRD_JPD_DUALFORCE2) },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(hid, gembird_devices);
|
|
|
|
static struct hid_driver gembird_driver = {
|
|
.name = "gembird",
|
|
.id_table = gembird_devices,
|
|
.report_fixup = gembird_report_fixup,
|
|
};
|
|
module_hid_driver(gembird_driver);
|
|
|
|
MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
|
|
MODULE_DESCRIPTION("HID Gembird joypad driver");
|
|
MODULE_LICENSE("GPL");
|