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
retrode_input_configured(struct hid_device * hdev,struct hid_input * hi)19 static 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
retrode_probe(struct hid_device * hdev,const struct hid_device_id * id)62 static 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
82 static const struct hid_device_id retrode_devices[] = {
83 { HID_USB_DEVICE(USB_VENDOR_ID_FUTURE_TECHNOLOGY, USB_DEVICE_ID_RETRODE2) },
84 { }
85 };
86 MODULE_DEVICE_TABLE(hid, retrode_devices);
87
88 static 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
95 module_hid_driver(retrode_driver);
96
97 MODULE_LICENSE("GPL");
98