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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
d0742aba JK |
2 | /* |
3 | * HID driver for zydacron remote control | |
4 | * | |
5 | * Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk> | |
6 | */ | |
7 | ||
8 | /* | |
d0742aba JK |
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 | */ | |
73e4008d NK |
27 | static __u8 *zc_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
28 | unsigned int *rsize) | |
d0742aba | 29 | { |
73e4008d | 30 | if (*rsize >= 253 && |
d0742aba JK |
31 | rdesc[0x96] == 0xbc && rdesc[0x97] == 0xff && |
32 | rdesc[0xca] == 0xbc && rdesc[0xcb] == 0xff && | |
33 | rdesc[0xe1] == 0xbc && rdesc[0xe2] == 0xff) { | |
4291ee30 JP |
34 | hid_info(hdev, |
35 | "fixing up zydacron remote control report descriptor\n"); | |
d0742aba JK |
36 | rdesc[0x96] = rdesc[0xca] = rdesc[0xe1] = 0x0c; |
37 | rdesc[0x97] = rdesc[0xcb] = rdesc[0xe2] = 0x00; | |
38 | } | |
73e4008d | 39 | return rdesc; |
d0742aba JK |
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(zc->input_ep81, EV_KEY, key, 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(zc->input_ep81, EV_KEY, key, 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 | ||
abf832bf | 169 | zc = devm_kzalloc(&hdev->dev, sizeof(*zc), GFP_KERNEL); |
d0742aba | 170 | if (zc == NULL) { |
4291ee30 | 171 | hid_err(hdev, "can't alloc descriptor\n"); |
d0742aba JK |
172 | return -ENOMEM; |
173 | } | |
174 | ||
175 | hid_set_drvdata(hdev, zc); | |
176 | ||
177 | ret = hid_parse(hdev); | |
178 | if (ret) { | |
4291ee30 | 179 | hid_err(hdev, "parse failed\n"); |
abf832bf | 180 | return ret; |
d0742aba JK |
181 | } |
182 | ||
183 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); | |
184 | if (ret) { | |
4291ee30 | 185 | hid_err(hdev, "hw start failed\n"); |
abf832bf | 186 | return ret; |
d0742aba JK |
187 | } |
188 | ||
189 | return 0; | |
d0742aba JK |
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, | |
d0742aba | 205 | }; |
f425458e | 206 | module_hid_driver(zc_driver); |
d0742aba | 207 | |
d0742aba | 208 | MODULE_LICENSE("GPL"); |