drivers/hid/hid-retrode.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *  HID driver for Retrode 2 controller adapter and plug-in extensions
0004  *
0005  *  Copyright (c) 2017 Bastien Nocera <hadess@hadess.net>
0006  */
0007
0008 /*
0009  */
0010
0011 #include <linux/input.h>
0012 #include <linux/slab.h>
0013 #include <linux/hid.h>
0014 #include <linux/module.h>
0015 #include "hid-ids.h"
0016
0017 #define CONTROLLER_NAME_BASE "Retrode"
0018
0019 static int retrode_input_configured(struct hid_device *hdev,
0020                     struct hid_input *hi)
0021 {
0022     struct hid_field *field = hi->report->field[0];
0023     const char *suffix;
0024     int number = 0;
0025     char *name;
0026
0027     switch (field->report->id) {
0028     case 0:
0029         suffix = "SNES Mouse";
0030         break;
0031     case 1:
0032     case 2:
0033         suffix = "SNES / N64";
0034         number = field->report->id;
0035         break;
0036     case 3:
0037     case 4:
0038         suffix = "Mega Drive";
0039         number = field->report->id - 2;
0040         break;
0041     default:
0042         hid_err(hdev, "Got unhandled report id %d\n", field->report->id);
0043         suffix = "Unknown";
0044     }
0045
0046     if (number)
0047         name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
0048                 "%s %s #%d", CONTROLLER_NAME_BASE,
0049                 suffix, number);
0050     else
0051         name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
0052                 "%s %s", CONTROLLER_NAME_BASE, suffix);
0053
0054     if (!name)
0055         return -ENOMEM;
0056
0057     hi->input->name = name;
0058
0059     return 0;
0060 }
0061
0062 static int retrode_probe(struct hid_device *hdev,
0063             const struct hid_device_id *id)
0064 {
0065
0066     int ret;
0067
0068     /* Has no effect on the mouse device */
0069     hdev->quirks |= HID_QUIRK_MULTI_INPUT;
0070
0071     ret = hid_parse(hdev);
0072     if (ret)
0073         return ret;
0074
0075     ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
0076     if (ret)
0077         return ret;
0078
0079     return 0;
0080 }
0081
0082 static const struct hid_device_id retrode_devices[] = {
0083     { HID_USB_DEVICE(USB_VENDOR_ID_FUTURE_TECHNOLOGY, USB_DEVICE_ID_RETRODE2) },
0084     { }
0085 };
0086 MODULE_DEVICE_TABLE(hid, retrode_devices);
0087
0088 static struct hid_driver retrode_driver = {
0089     .name             = "hid-retrode",
0090     .id_table         = retrode_devices,
0091     .input_configured = retrode_input_configured,
0092     .probe            = retrode_probe,
0093 };
0094
0095 module_hid_driver(retrode_driver);
0096
0097 MODULE_LICENSE("GPL");