1 /* 2 * Force feedback support for Betop based devices 3 * 4 * The devices are distributed under various names and the same USB device ID 5 * can be used in both adapters and actual game controllers. 6 * 7 * 0x11c2:0x2208 "BTP2185 BFM mode Joystick" 8 * - tested with BTP2185 BFM Mode. 9 * 10 * 0x11C0:0x5506 "BTP2185 PC mode Joystick" 11 * - tested with BTP2185 PC Mode. 12 * 13 * 0x8380:0x1850 "BTP2185 V2 PC mode USB Gamepad" 14 * - tested with BTP2185 PC Mode with another version. 15 * 16 * 0x20bc:0x5500 "BTP2185 V2 BFM mode Joystick" 17 * - tested with BTP2171s. 18 * Copyright (c) 2014 Huang Bo <huangbobupt@163.com> 19 */ 20 21 /* 22 * This program is free software; you can redistribute it and/or modify it 23 * under the terms of the GNU General Public License as published by the Free 24 * Software Foundation; either version 2 of the License, or (at your option) 25 * any later version. 26 */ 27 28 29 #include <linux/input.h> 30 #include <linux/slab.h> 31 #include <linux/module.h> 32 #include <linux/hid.h> 33 34 #include "hid-ids.h" 35 36 struct betopff_device { 37 struct hid_report *report; 38 }; 39 40 static int hid_betopff_play(struct input_dev *dev, void *data, 41 struct ff_effect *effect) 42 { 43 struct hid_device *hid = input_get_drvdata(dev); 44 struct betopff_device *betopff = data; 45 __u16 left, right; 46 47 left = effect->u.rumble.strong_magnitude; 48 right = effect->u.rumble.weak_magnitude; 49 50 betopff->report->field[2]->value[0] = left / 256; 51 betopff->report->field[3]->value[0] = right / 256; 52 53 hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT); 54 55 return 0; 56 } 57 58 static int betopff_init(struct hid_device *hid) 59 { 60 struct betopff_device *betopff; 61 struct hid_report *report; 62 struct hid_input *hidinput = 63 list_first_entry(&hid->inputs, struct hid_input, list); 64 struct list_head *report_list = 65 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 66 struct input_dev *dev = hidinput->input; 67 int field_count = 0; 68 int error; 69 int i, j; 70 71 if (list_empty(report_list)) { 72 hid_err(hid, "no output reports found\n"); 73 return -ENODEV; 74 } 75 76 report = list_first_entry(report_list, struct hid_report, list); 77 /* 78 * Actually there are 4 fields for 4 Bytes as below: 79 * ----------------------------------------- 80 * Byte0 Byte1 Byte2 Byte3 81 * 0x00 0x00 left_motor right_motor 82 * ----------------------------------------- 83 * Do init them with default value. 84 */ 85 for (i = 0; i < report->maxfield; i++) { 86 for (j = 0; j < report->field[i]->report_count; j++) { 87 report->field[i]->value[j] = 0x00; 88 field_count++; 89 } 90 } 91 92 if (field_count < 4) { 93 hid_err(hid, "not enough fields in the report: %d\n", 94 field_count); 95 return -ENODEV; 96 } 97 98 betopff = kzalloc(sizeof(*betopff), GFP_KERNEL); 99 if (!betopff) 100 return -ENOMEM; 101 102 set_bit(FF_RUMBLE, dev->ffbit); 103 104 error = input_ff_create_memless(dev, betopff, hid_betopff_play); 105 if (error) { 106 kfree(betopff); 107 return error; 108 } 109 110 betopff->report = report; 111 hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT); 112 113 hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n"); 114 115 return 0; 116 } 117 118 static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id) 119 { 120 int ret; 121 122 if (id->driver_data) 123 hdev->quirks |= HID_QUIRK_MULTI_INPUT; 124 125 ret = hid_parse(hdev); 126 if (ret) { 127 hid_err(hdev, "parse failed\n"); 128 goto err; 129 } 130 131 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 132 if (ret) { 133 hid_err(hdev, "hw start failed\n"); 134 goto err; 135 } 136 137 betopff_init(hdev); 138 139 return 0; 140 err: 141 return ret; 142 } 143 144 static const struct hid_device_id betop_devices[] = { 145 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) }, 146 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) }, 147 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) }, 148 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) }, 149 { } 150 }; 151 MODULE_DEVICE_TABLE(hid, betop_devices); 152 153 static struct hid_driver betop_driver = { 154 .name = "betop", 155 .id_table = betop_devices, 156 .probe = betop_probe, 157 }; 158 module_hid_driver(betop_driver); 159 160 MODULE_LICENSE("GPL"); 161