1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Force feedback support for Betop based devices 4 * 5 * The devices are distributed under various names and the same USB device ID 6 * 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 33 struct betopff_device { 34 struct hid_report *report; 35 }; 36 37 static 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 55 static 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 Byte3 84 * 0x00 0x00 left_motor right_motor 85 * ----------------------------------------- 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 } 122 123 static 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; 145 err: 146 return ret; 147 } 148 149 static 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 }; 156 MODULE_DEVICE_TABLE(hid, betop_devices); 157 158 static struct hid_driver betop_driver = { 159 .name = "betop", 160 .id_table = betop_devices, 161 .probe = betop_probe, 162 }; 163 module_hid_driver(betop_driver); 164 165 MODULE_DESCRIPTION("Force feedback support for Betop based devices"); 166 MODULE_LICENSE("GPL"); 167