1/*
2* HID driver for zydacron remote control
3*
4* Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk>
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/device.h>
15#include <linux/hid.h>
16#include <linux/module.h>
17
18#include "hid-ids.h"
19
20struct zc_device {
21 struct input_dev *input_ep81;
22 unsigned short last_key[4];
23};
24
25
26/*
27* Zydacron remote control has an invalid HID report descriptor,
28* that needs fixing before we can parse it.
29*/
30static __u8 *zc_report_fixup(struct hid_device *hdev, __u8 *rdesc,
31 unsigned int *rsize)
32{
33 if (*rsize >= 253 &&
34 rdesc[0x96] == 0xbc && rdesc[0x97] == 0xff &&
35 rdesc[0xca] == 0xbc && rdesc[0xcb] == 0xff &&
36 rdesc[0xe1] == 0xbc && rdesc[0xe2] == 0xff) {
37 hid_info(hdev,
38 "fixing up zydacron remote control report descriptor\n");
39 rdesc[0x96] = rdesc[0xca] = rdesc[0xe1] = 0x0c;
40 rdesc[0x97] = rdesc[0xcb] = rdesc[0xe2] = 0x00;
41 }
42 return rdesc;
43}
44
45#define zc_map_key_clear(c) \
46 hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
47
48static int zc_input_mapping(struct hid_device *hdev, struct hid_input *hi,
49 struct hid_field *field, struct hid_usage *usage,
50 unsigned long **bit, int *max)
51{
52 int i;
53 struct zc_device *zc = hid_get_drvdata(hdev);
54 zc->input_ep81 = hi->input;
55
56 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
57 return 0;
58
59 dbg_hid("zynacron input mapping event [0x%x]\n",
60 usage->hid & HID_USAGE);
61
62 switch (usage->hid & HID_USAGE) {
63 /* report 2 */
64 case 0x10:
65 zc_map_key_clear(KEY_MODE);
66 break;
67 case 0x30:
68 zc_map_key_clear(KEY_SCREEN);
69 break;
70 case 0x70:
71 zc_map_key_clear(KEY_INFO);
72 break;
73 /* report 3 */
74 case 0x04:
75 zc_map_key_clear(KEY_RADIO);
76 break;
77 /* report 4 */
78 case 0x0d:
79 zc_map_key_clear(KEY_PVR);
80 break;
81 case 0x25:
82 zc_map_key_clear(KEY_TV);
83 break;
84 case 0x47:
85 zc_map_key_clear(KEY_AUDIO);
86 break;
87 case 0x49:
88 zc_map_key_clear(KEY_AUX);
89 break;
90 case 0x4a:
91 zc_map_key_clear(KEY_VIDEO);
92 break;
93 case 0x48:
94 zc_map_key_clear(KEY_DVD);
95 break;
96 case 0x24:
97 zc_map_key_clear(KEY_MENU);
98 break;
99 case 0x32:
100 zc_map_key_clear(KEY_TEXT);
101 break;
102 default:
103 return 0;
104 }
105
106 for (i = 0; i < 4; i++)
107 zc->last_key[i] = 0;
108
109 return 1;
110}
111
112static int zc_raw_event(struct hid_device *hdev, struct hid_report *report,
113 u8 *data, int size)
114{
115 struct zc_device *zc = hid_get_drvdata(hdev);
116 int ret = 0;
117 unsigned key;
118 unsigned short index;
119
120 if (report->id == data[0]) {
121
122 /* break keys */
123 for (index = 0; index < 4; index++) {
124 key = zc->last_key[index];
125 if (key) {
126 input_event(zc->input_ep81, EV_KEY, key, 0);
127 zc->last_key[index] = 0;
128 }
129 }
130
131 key = 0;
132 switch (report->id) {
133 case 0x02:
134 case 0x03:
135 switch (data[1]) {
136 case 0x10:
137 key = KEY_MODE;
138 index = 0;
139 break;
140 case 0x30:
141 key = KEY_SCREEN;
142 index = 1;
143 break;
144 case 0x70:
145 key = KEY_INFO;
146 index = 2;
147 break;
148 case 0x04:
149 key = KEY_RADIO;
150 index = 3;
151 break;
152 }
153
154 if (key) {
155 input_event(zc->input_ep81, EV_KEY, key, 1);
156 zc->last_key[index] = key;
157 }
158
159 ret = 1;
160 break;
161 }
162 }
163
164 return ret;
165}
166
167static int zc_probe(struct hid_device *hdev, const struct hid_device_id *id)
168{
169 int ret;
170 struct zc_device *zc;
171
172 zc = devm_kzalloc(&hdev->dev, sizeof(*zc), GFP_KERNEL);
173 if (zc == NULL) {
174 hid_err(hdev, "can't alloc descriptor\n");
175 return -ENOMEM;
176 }
177
178 hid_set_drvdata(hdev, zc);
179
180 ret = hid_parse(hdev);
181 if (ret) {
182 hid_err(hdev, "parse failed\n");
183 return ret;
184 }
185
186 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
187 if (ret) {
188 hid_err(hdev, "hw start failed\n");
189 return ret;
190 }
191
192 return 0;
193}
194
195static const struct hid_device_id zc_devices[] = {
196 { HID_USB_DEVICE(USB_VENDOR_ID_ZYDACRON, USB_DEVICE_ID_ZYDACRON_REMOTE_CONTROL) },
197 { }
198};
199MODULE_DEVICE_TABLE(hid, zc_devices);
200
201static struct hid_driver zc_driver = {
202 .name = "zydacron",
203 .id_table = zc_devices,
204 .report_fixup = zc_report_fixup,
205 .input_mapping = zc_input_mapping,
206 .raw_event = zc_raw_event,
207 .probe = zc_probe,
208};
209module_hid_driver(zc_driver);
210
211MODULE_LICENSE("GPL");
212