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

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  HID driver for Retrode 2 controller adapter and plug-in extensions
   4 *
   5 *  Copyright (c) 2017 Bastien Nocera <hadess@hadess.net>
   6 */
   7
   8/*
   9 */
  10
  11#include <linux/input.h>
  12#include <linux/slab.h>
  13#include <linux/hid.h>
  14#include <linux/module.h>
  15#include "hid-ids.h"
  16
  17#define CONTROLLER_NAME_BASE "Retrode"
  18
  19static int retrode_input_configured(struct hid_device *hdev,
  20                                        struct hid_input *hi)
  21{
  22        struct hid_field *field = hi->report->field[0];
  23        const char *suffix;
  24        int number = 0;
  25        char *name;
  26
  27        switch (field->report->id) {
  28        case 0:
  29                suffix = "SNES Mouse";
  30                break;
  31        case 1:
  32        case 2:
  33                suffix = "SNES / N64";
  34                number = field->report->id;
  35                break;
  36        case 3:
  37        case 4:
  38                suffix = "Mega Drive";
  39                number = field->report->id - 2;
  40                break;
  41        default:
  42                hid_err(hdev, "Got unhandled report id %d\n", field->report->id);
  43                suffix = "Unknown";
  44        }
  45
  46        if (number)
  47                name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
  48                                "%s %s #%d", CONTROLLER_NAME_BASE,
  49                                suffix, number);
  50        else
  51                name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
  52                                "%s %s", CONTROLLER_NAME_BASE, suffix);
  53
  54        if (!name)
  55                return -ENOMEM;
  56
  57        hi->input->name = name;
  58
  59        return 0;
  60}
  61
  62static int retrode_probe(struct hid_device *hdev,
  63                        const struct hid_device_id *id)
  64{
  65
  66        int ret;
  67
  68        /* Has no effect on the mouse device */
  69        hdev->quirks |= HID_QUIRK_MULTI_INPUT;
  70
  71        ret = hid_parse(hdev);
  72        if (ret)
  73                return ret;
  74
  75        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
  76        if (ret)
  77                return ret;
  78
  79        return 0;
  80}
  81
  82static const struct hid_device_id retrode_devices[] = {
  83        { HID_USB_DEVICE(USB_VENDOR_ID_FUTURE_TECHNOLOGY, USB_DEVICE_ID_RETRODE2) },
  84        { }
  85};
  86MODULE_DEVICE_TABLE(hid, retrode_devices);
  87
  88static struct hid_driver retrode_driver = {
  89        .name             = "hid-retrode",
  90        .id_table         = retrode_devices,
  91        .input_configured = retrode_input_configured,
  92        .probe            = retrode_probe,
  93};
  94
  95module_hid_driver(retrode_driver);
  96
  97MODULE_LICENSE("GPL");
  98