1/*
2 * HID driver for Retrode 2 controller adapter and plug-in extensions
3 *
4 * Copyright (c) 2017 Bastien Nocera <hadess@hadess.net>
5 */
6
7/*
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
12 */
13
14#include <linux/input.h>
15#include <linux/slab.h>
16#include <linux/hid.h>
17#include <linux/module.h>
18#include "hid-ids.h"
19
20#define CONTROLLER_NAME_BASE "Retrode"
21
22static int retrode_input_configured(struct hid_device *hdev,
23 struct hid_input *hi)
24{
25 struct hid_field *field = hi->report->field[0];
26 const char *suffix;
27 int number = 0;
28 char *name;
29
30 switch (field->report->id) {
31 case 0:
32 suffix = "SNES Mouse";
33 break;
34 case 1:
35 case 2:
36 suffix = "SNES / N64";
37 number = field->report->id;
38 break;
39 case 3:
40 case 4:
41 suffix = "Mega Drive";
42 number = field->report->id - 2;
43 break;
44 default:
45 hid_err(hdev, "Got unhandled report id %d\n", field->report->id);
46 suffix = "Unknown";
47 }
48
49 if (number)
50 name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
51 "%s %s #%d", CONTROLLER_NAME_BASE,
52 suffix, number);
53 else
54 name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
55 "%s %s", CONTROLLER_NAME_BASE, suffix);
56
57 if (!name)
58 return -ENOMEM;
59
60 hi->input->name = name;
61
62 return 0;
63}
64
65static int retrode_probe(struct hid_device *hdev,
66 const struct hid_device_id *id)
67{
68
69 int ret;
70
71 /* Has no effect on the mouse device */
72 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
73
74 ret = hid_parse(hdev);
75 if (ret)
76 return ret;
77
78 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
79 if (ret)
80 return ret;
81
82 return 0;
83}
84
85static const struct hid_device_id retrode_devices[] = {
86 { HID_USB_DEVICE(USB_VENDOR_ID_FUTURE_TECHNOLOGY, USB_DEVICE_ID_RETRODE2) },
87 { }
88};
89MODULE_DEVICE_TABLE(hid, retrode_devices);
90
91static struct hid_driver retrode_driver = {
92 .name = "hid-retrode",
93 .id_table = retrode_devices,
94 .input_configured = retrode_input_configured,
95 .probe = retrode_probe,
96};
97
98module_hid_driver(retrode_driver);
99
100MODULE_LICENSE("GPL");
101