1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * HID driver for zydacron remote control |
4 | * |
5 | * Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk> |
6 | */ |
7 | |
8 | /* |
9 | */ |
10 | |
11 | #include <linux/device.h> |
12 | #include <linux/hid.h> |
13 | #include <linux/module.h> |
14 | |
15 | #include "hid-ids.h" |
16 | |
17 | struct zc_device { |
18 | struct input_dev *input_ep81; |
19 | unsigned short last_key[4]; |
20 | }; |
21 | |
22 | |
23 | /* |
24 | * Zydacron remote control has an invalid HID report descriptor, |
25 | * that needs fixing before we can parse it. |
26 | */ |
27 | static __u8 *zc_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
28 | unsigned int *rsize) |
29 | { |
30 | if (*rsize >= 253 && |
31 | rdesc[0x96] == 0xbc && rdesc[0x97] == 0xff && |
32 | rdesc[0xca] == 0xbc && rdesc[0xcb] == 0xff && |
33 | rdesc[0xe1] == 0xbc && rdesc[0xe2] == 0xff) { |
34 | hid_info(hdev, |
35 | "fixing up zydacron remote control report descriptor\n" ); |
36 | rdesc[0x96] = rdesc[0xca] = rdesc[0xe1] = 0x0c; |
37 | rdesc[0x97] = rdesc[0xcb] = rdesc[0xe2] = 0x00; |
38 | } |
39 | return rdesc; |
40 | } |
41 | |
42 | #define zc_map_key_clear(c) \ |
43 | hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c)) |
44 | |
45 | static int zc_input_mapping(struct hid_device *hdev, struct hid_input *hi, |
46 | struct hid_field *field, struct hid_usage *usage, |
47 | unsigned long **bit, int *max) |
48 | { |
49 | int i; |
50 | struct zc_device *zc = hid_get_drvdata(hdev); |
51 | zc->input_ep81 = hi->input; |
52 | |
53 | if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) |
54 | return 0; |
55 | |
56 | dbg_hid("zynacron input mapping event [0x%x]\n" , |
57 | usage->hid & HID_USAGE); |
58 | |
59 | switch (usage->hid & HID_USAGE) { |
60 | /* report 2 */ |
61 | case 0x10: |
62 | zc_map_key_clear(KEY_MODE); |
63 | break; |
64 | case 0x30: |
65 | zc_map_key_clear(KEY_SCREEN); |
66 | break; |
67 | case 0x70: |
68 | zc_map_key_clear(KEY_INFO); |
69 | break; |
70 | /* report 3 */ |
71 | case 0x04: |
72 | zc_map_key_clear(KEY_RADIO); |
73 | break; |
74 | /* report 4 */ |
75 | case 0x0d: |
76 | zc_map_key_clear(KEY_PVR); |
77 | break; |
78 | case 0x25: |
79 | zc_map_key_clear(KEY_TV); |
80 | break; |
81 | case 0x47: |
82 | zc_map_key_clear(KEY_AUDIO); |
83 | break; |
84 | case 0x49: |
85 | zc_map_key_clear(KEY_AUX); |
86 | break; |
87 | case 0x4a: |
88 | zc_map_key_clear(KEY_VIDEO); |
89 | break; |
90 | case 0x48: |
91 | zc_map_key_clear(KEY_DVD); |
92 | break; |
93 | case 0x24: |
94 | zc_map_key_clear(KEY_MENU); |
95 | break; |
96 | case 0x32: |
97 | zc_map_key_clear(KEY_TEXT); |
98 | break; |
99 | default: |
100 | return 0; |
101 | } |
102 | |
103 | for (i = 0; i < 4; i++) |
104 | zc->last_key[i] = 0; |
105 | |
106 | return 1; |
107 | } |
108 | |
109 | static int zc_raw_event(struct hid_device *hdev, struct hid_report *report, |
110 | u8 *data, int size) |
111 | { |
112 | struct zc_device *zc = hid_get_drvdata(hdev); |
113 | int ret = 0; |
114 | unsigned key; |
115 | unsigned short index; |
116 | |
117 | if (report->id == data[0]) { |
118 | |
119 | /* break keys */ |
120 | for (index = 0; index < 4; index++) { |
121 | key = zc->last_key[index]; |
122 | if (key) { |
123 | input_event(dev: zc->input_ep81, EV_KEY, code: key, value: 0); |
124 | zc->last_key[index] = 0; |
125 | } |
126 | } |
127 | |
128 | key = 0; |
129 | switch (report->id) { |
130 | case 0x02: |
131 | case 0x03: |
132 | switch (data[1]) { |
133 | case 0x10: |
134 | key = KEY_MODE; |
135 | index = 0; |
136 | break; |
137 | case 0x30: |
138 | key = KEY_SCREEN; |
139 | index = 1; |
140 | break; |
141 | case 0x70: |
142 | key = KEY_INFO; |
143 | index = 2; |
144 | break; |
145 | case 0x04: |
146 | key = KEY_RADIO; |
147 | index = 3; |
148 | break; |
149 | } |
150 | |
151 | if (key) { |
152 | input_event(dev: zc->input_ep81, EV_KEY, code: key, value: 1); |
153 | zc->last_key[index] = key; |
154 | } |
155 | |
156 | ret = 1; |
157 | break; |
158 | } |
159 | } |
160 | |
161 | return ret; |
162 | } |
163 | |
164 | static int zc_probe(struct hid_device *hdev, const struct hid_device_id *id) |
165 | { |
166 | int ret; |
167 | struct zc_device *zc; |
168 | |
169 | zc = devm_kzalloc(dev: &hdev->dev, size: sizeof(*zc), GFP_KERNEL); |
170 | if (zc == NULL) { |
171 | hid_err(hdev, "can't alloc descriptor\n" ); |
172 | return -ENOMEM; |
173 | } |
174 | |
175 | hid_set_drvdata(hdev, data: zc); |
176 | |
177 | ret = hid_parse(hdev); |
178 | if (ret) { |
179 | hid_err(hdev, "parse failed\n" ); |
180 | return ret; |
181 | } |
182 | |
183 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
184 | if (ret) { |
185 | hid_err(hdev, "hw start failed\n" ); |
186 | return ret; |
187 | } |
188 | |
189 | return 0; |
190 | } |
191 | |
192 | static const struct hid_device_id zc_devices[] = { |
193 | { HID_USB_DEVICE(USB_VENDOR_ID_ZYDACRON, USB_DEVICE_ID_ZYDACRON_REMOTE_CONTROL) }, |
194 | { } |
195 | }; |
196 | MODULE_DEVICE_TABLE(hid, zc_devices); |
197 | |
198 | static struct hid_driver zc_driver = { |
199 | .name = "zydacron" , |
200 | .id_table = zc_devices, |
201 | .report_fixup = zc_report_fixup, |
202 | .input_mapping = zc_input_mapping, |
203 | .raw_event = zc_raw_event, |
204 | .probe = zc_probe, |
205 | }; |
206 | module_hid_driver(zc_driver); |
207 | |
208 | MODULE_LICENSE("GPL" ); |
209 | |