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

   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
  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 field_count = 0;
  64        int error;
  65        int i, j;
  66
  67        if (list_empty(&hid->inputs)) {
  68                hid_err(hid, "no inputs found\n");
  69                return -ENODEV;
  70        }
  71
  72        hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
  73        dev = hidinput->input;
  74
  75        if (list_empty(report_list)) {
  76                hid_err(hid, "no output reports found\n");
  77                return -ENODEV;
  78        }
  79
  80        report = list_first_entry(report_list, struct hid_report, list);
  81        /*
  82         * Actually there are 4 fields for 4 Bytes as below:
  83         * -----------------------------------------
  84         * Byte0  Byte1  Byte2    Byte3
  85         * 0x00   0x00   left_motor right_motor
  86         * -----------------------------------------
  87         * Do init them with default value.
  88         */
  89        for (i = 0; i < report->maxfield; i++) {
  90                for (j = 0; j < report->field[i]->report_count; j++) {
  91                        report->field[i]->value[j] = 0x00;
  92                        field_count++;
  93                }
  94        }
  95
  96        if (field_count < 4) {
  97                hid_err(hid, "not enough fields in the report: %d\n",
  98                                field_count);
  99                return -ENODEV;
 100        }
 101
 102        betopff = kzalloc(sizeof(*betopff), GFP_KERNEL);
 103        if (!betopff)
 104                return -ENOMEM;
 105
 106        set_bit(FF_RUMBLE, dev->ffbit);
 107
 108        error = input_ff_create_memless(dev, betopff, hid_betopff_play);
 109        if (error) {
 110                kfree(betopff);
 111                return error;
 112        }
 113
 114        betopff->report = report;
 115        hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
 116
 117        hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n");
 118
 119        return 0;
 120}
 121
 122static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id)
 123{
 124        int ret;
 125
 126        if (id->driver_data)
 127                hdev->quirks |= HID_QUIRK_MULTI_INPUT;
 128
 129        ret = hid_parse(hdev);
 130        if (ret) {
 131                hid_err(hdev, "parse failed\n");
 132                goto err;
 133        }
 134
 135        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
 136        if (ret) {
 137                hid_err(hdev, "hw start failed\n");
 138                goto err;
 139        }
 140
 141        betopff_init(hdev);
 142
 143        return 0;
 144err:
 145        return ret;
 146}
 147
 148static const struct hid_device_id betop_devices[] = {
 149        { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) },
 150        { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) },
 151        { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) },
 152        { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) },
 153        { }
 154};
 155MODULE_DEVICE_TABLE(hid, betop_devices);
 156
 157static struct hid_driver betop_driver = {
 158        .name = "betop",
 159        .id_table = betop_devices,
 160        .probe = betop_probe,
 161};
 162module_hid_driver(betop_driver);
 163
 164MODULE_LICENSE("GPL");
 165