LXR linux/drivers/hid/hid-betopff.c

   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
  36struct betopff_device {
  37        struct hid_report *report;
  38};
  39
  40static 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
  58static 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
 118static 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;
 140err:
 141        return ret;
 142}
 143
 144static 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};
 151MODULE_DEVICE_TABLE(hid, betop_devices);
 152
 153static struct hid_driver betop_driver = {
 154        .name = "betop",
 155        .id_table = betop_devices,
 156        .probe = betop_probe,
 157};
 158module_hid_driver(betop_driver);
 159
 160MODULE_LICENSE("GPL");
 161