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 | |
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(dev: &hdev->dev, GFP_KERNEL, |
48 | fmt: "%s %s #%d" , CONTROLLER_NAME_BASE, |
49 | suffix, number); |
50 | else |
51 | name = devm_kasprintf(dev: &hdev->dev, GFP_KERNEL, |
52 | fmt: "%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 | |
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 | |