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 list_first_entry(&hid->inputs, struct hid_input, list); 61 struct list_head *report_list = 62 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 63 struct input_dev *dev = hidinput->input; 64 int field_count = 0; 65 int error; 66 int i, j; 67 68 if (list_empty(report_list)) { 69 hid_err(hid, "no output reports found\n"); 70 return -ENODEV; 71 } 72 73 report = list_first_entry(report_list, struct hid_report, list); 74 /* 75 * Actually there are 4 fields for 4 Bytes as below: 76 * ----------------------------------------- 77 * Byte0 Byte1 Byte2 Byte3 78 * 0x00 0x00 left_motor right_motor 79 * ----------------------------------------- 80 * Do init them with default value. 81 */ 82 for (i = 0; i < report->maxfield; i++) { 83 for (j = 0; j < report->field[i]->report_count; j++) { 84 report->field[i]->value[j] = 0x00; 85 field_count++; 86 } 87 } 88 89 if (field_count < 4) { 90 hid_err(hid, "not enough fields in the report: %d\n", 91 field_count); 92 return -ENODEV; 93 } 94 95 betopff = kzalloc(sizeof(*betopff), GFP_KERNEL); 96 if (!betopff) 97 return -ENOMEM; 98 99 set_bit(FF_RUMBLE, dev->ffbit); 100 101 error = input_ff_create_memless(dev, betopff, hid_betopff_play); 102 if (error) { 103 kfree(betopff); 104 return error; 105 } 106 107 betopff->report = report; 108 hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT); 109 110 hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n"); 111 112 return 0; 113 } 114 115 static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id) 116 { 117 int ret; 118 119 if (id->driver_data) 120 hdev->quirks |= HID_QUIRK_MULTI_INPUT; 121 122 ret = hid_parse(hdev); 123 if (ret) { 124 hid_err(hdev, "parse failed\n"); 125 goto err; 126 } 127 128 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 129 if (ret) { 130 hid_err(hdev, "hw start failed\n"); 131 goto err; 132 } 133 134 betopff_init(hdev); 135 136 return 0; 137 err: 138 return ret; 139 } 140 141 static const struct hid_device_id betop_devices[] = { 142 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) }, 143 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) }, 144 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) }, 145 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) }, 146 { } 147 }; 148 MODULE_DEVICE_TABLE(hid, betop_devices); 149 150 static struct hid_driver betop_driver = { 151 .name = "betop", 152 .id_table = betop_devices, 153 .probe = betop_probe, 154 }; 155 module_hid_driver(betop_driver); 156 157 MODULE_LICENSE("GPL"); 158