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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Force feedback support for Betop based devices
*
* The devices are distributed under various names and the same USB device ID
* can be used in both adapters and actual game controllers.
*
* 0x11c2:0x2208 "BTP2185 BFM mode Joystick"
* - tested with BTP2185 BFM Mode.
*
* 0x11C0:0x5506 "BTP2185 PC mode Joystick"
* - tested with BTP2185 PC Mode.
*
* 0x8380:0x1850 "BTP2185 V2 PC mode USB Gamepad"
* - tested with BTP2185 PC Mode with another version.
*
* 0x20bc:0x5500 "BTP2185 V2 BFM mode Joystick"
* - tested with BTP2171s.
* Copyright (c) 2014 Huang Bo <huangbobupt@163.com>
*/
/*
*/
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/hid.h>
#include "hid-ids.h"
struct betopff_device {
struct hid_report *report;
};
static int hid_betopff_play(struct input_dev *dev, void *data,
struct ff_effect *effect)
{
struct hid_device *hid = input_get_drvdata(dev);
struct betopff_device *betopff = data;
__u16 left, right;
left = effect->u.rumble.strong_magnitude;
right = effect->u.rumble.weak_magnitude;
betopff->report->field[2]->value[0] = left / 256;
betopff->report->field[3]->value[0] = right / 256;
hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
return 0;
}
static int betopff_init(struct hid_device *hid)
{
struct betopff_device *betopff;
struct hid_report *report;
struct hid_input *hidinput;
struct list_head *report_list =
&hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct input_dev *dev;
int field_count = 0;
int error;
int i, j;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
dev = hidinput->input;
if (list_empty(report_list)) {
hid_err(hid, "no output reports found\n");
return -ENODEV;
}
report = list_first_entry(report_list, struct hid_report, list);
/*
* Actually there are 4 fields for 4 Bytes as below:
* -----------------------------------------
* Byte0 Byte1 Byte2 Byte3
* 0x00 0x00 left_motor right_motor
* -----------------------------------------
* Do init them with default value.
*/
for (i = 0; i < report->maxfield; i++) {
for (j = 0; j < report->field[i]->report_count; j++) {
report->field[i]->value[j] = 0x00;
field_count++;
}
}
if (field_count < 4) {
hid_err(hid, "not enough fields in the report: %d\n",
field_count);
return -ENODEV;
}
betopff = kzalloc(sizeof(*betopff), GFP_KERNEL);
if (!betopff)
return -ENOMEM;
set_bit(FF_RUMBLE, dev->ffbit);
error = input_ff_create_memless(dev, betopff, hid_betopff_play);
if (error) {
kfree(betopff);
return error;
}
betopff->report = report;
hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n");
return 0;
}
static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
int ret;
if (id->driver_data)
hdev->quirks |= HID_QUIRK_MULTI_INPUT;
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n");
goto err;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
if (ret) {
hid_err(hdev, "hw start failed\n");
goto err;
}
betopff_init(hdev);
return 0;
err:
return ret;
}
static const struct hid_device_id betop_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) },
{ HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) },
{ HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) },
{ HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) },
{ }
};
MODULE_DEVICE_TABLE(hid, betop_devices);
static struct hid_driver betop_driver = {
.name = "betop",
.id_table = betop_devices,
.probe = betop_probe,
};
module_hid_driver(betop_driver);
MODULE_LICENSE("GPL");
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