167 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Force feedback support for Betop based devices4 *5 * The devices are distributed under various names and the same USB device ID6 * can be used in both adapters and actual game controllers.7 *8 * 0x11c2:0x2208 "BTP2185 BFM mode Joystick"9 * - tested with BTP2185 BFM Mode.10 *11 * 0x11C0:0x5506 "BTP2185 PC mode Joystick"12 * - tested with BTP2185 PC Mode.13 *14 * 0x8380:0x1850 "BTP2185 V2 PC mode USB Gamepad"15 * - tested with BTP2185 PC Mode with another version.16 *17 * 0x20bc:0x5500 "BTP2185 V2 BFM mode Joystick"18 * - tested with BTP2171s.19 * Copyright (c) 2014 Huang Bo <huangbobupt@163.com>20 */21 22/*23 */24 25 26#include <linux/input.h>27#include <linux/slab.h>28#include <linux/module.h>29#include <linux/hid.h>30 31#include "hid-ids.h"32 33struct betopff_device {34 struct hid_report *report;35};36 37static int hid_betopff_play(struct input_dev *dev, void *data,38 struct ff_effect *effect)39{40 struct hid_device *hid = input_get_drvdata(dev);41 struct betopff_device *betopff = data;42 __u16 left, right;43 44 left = effect->u.rumble.strong_magnitude;45 right = effect->u.rumble.weak_magnitude;46 47 betopff->report->field[2]->value[0] = left / 256;48 betopff->report->field[3]->value[0] = right / 256;49 50 hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);51 52 return 0;53}54 55static int betopff_init(struct hid_device *hid)56{57 struct betopff_device *betopff;58 struct hid_report *report;59 struct hid_input *hidinput;60 struct list_head *report_list =61 &hid->report_enum[HID_OUTPUT_REPORT].report_list;62 struct input_dev *dev;63 int error;64 int i, j;65 66 if (list_empty(&hid->inputs)) {67 hid_err(hid, "no inputs found\n");68 return -ENODEV;69 }70 71 hidinput = list_first_entry(&hid->inputs, struct hid_input, list);72 dev = hidinput->input;73 74 if (list_empty(report_list)) {75 hid_err(hid, "no output reports found\n");76 return -ENODEV;77 }78 79 report = list_first_entry(report_list, struct hid_report, list);80 /*81 * Actually there are 4 fields for 4 Bytes as below:82 * -----------------------------------------83 * Byte0 Byte1 Byte2 Byte384 * 0x00 0x00 left_motor right_motor85 * -----------------------------------------86 * Do init them with default value.87 */88 if (report->maxfield < 4) {89 hid_err(hid, "not enough fields in the report: %d\n",90 report->maxfield);91 return -ENODEV;92 }93 for (i = 0; i < report->maxfield; i++) {94 if (report->field[i]->report_count < 1) {95 hid_err(hid, "no values in the field\n");96 return -ENODEV;97 }98 for (j = 0; j < report->field[i]->report_count; j++) {99 report->field[i]->value[j] = 0x00;100 }101 }102 103 betopff = kzalloc(sizeof(*betopff), GFP_KERNEL);104 if (!betopff)105 return -ENOMEM;106 107 set_bit(FF_RUMBLE, dev->ffbit);108 109 error = input_ff_create_memless(dev, betopff, hid_betopff_play);110 if (error) {111 kfree(betopff);112 return error;113 }114 115 betopff->report = report;116 hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);117 118 hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n");119 120 return 0;121}122 123static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id)124{125 int ret;126 127 if (id->driver_data)128 hdev->quirks |= HID_QUIRK_MULTI_INPUT;129 130 ret = hid_parse(hdev);131 if (ret) {132 hid_err(hdev, "parse failed\n");133 goto err;134 }135 136 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);137 if (ret) {138 hid_err(hdev, "hw start failed\n");139 goto err;140 }141 142 betopff_init(hdev);143 144 return 0;145err:146 return ret;147}148 149static const struct hid_device_id betop_devices[] = {150 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) },151 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) },152 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) },153 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) },154 { }155};156MODULE_DEVICE_TABLE(hid, betop_devices);157 158static struct hid_driver betop_driver = {159 .name = "betop",160 .id_table = betop_devices,161 .probe = betop_probe,162};163module_hid_driver(betop_driver);164 165MODULE_DESCRIPTION("Force feedback support for Betop based devices");166MODULE_LICENSE("GPL");167