Merge branch 'master'; commit 'v2.6.38-rc7' into next
[pandora-kernel.git] / drivers / hid / hid-zydacron.c
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
20 struct 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 */
30 static __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
48 static 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
112 static 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
167 static 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 = kzalloc(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                 goto err_free;
184         }
185
186         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
187         if (ret) {
188                 hid_err(hdev, "hw start failed\n");
189                 goto err_free;
190         }
191
192         return 0;
193 err_free:
194         kfree(zc);
195
196         return ret;
197 }
198
199 static void zc_remove(struct hid_device *hdev)
200 {
201         struct zc_device *zc = hid_get_drvdata(hdev);
202
203         hid_hw_stop(hdev);
204
205         if (NULL != zc)
206                 kfree(zc);
207 }
208
209 static const struct hid_device_id zc_devices[] = {
210         { HID_USB_DEVICE(USB_VENDOR_ID_ZYDACRON, USB_DEVICE_ID_ZYDACRON_REMOTE_CONTROL) },
211         { }
212 };
213 MODULE_DEVICE_TABLE(hid, zc_devices);
214
215 static struct hid_driver zc_driver = {
216         .name = "zydacron",
217         .id_table = zc_devices,
218         .report_fixup = zc_report_fixup,
219         .input_mapping = zc_input_mapping,
220         .raw_event = zc_raw_event,
221         .probe = zc_probe,
222         .remove = zc_remove,
223 };
224
225 static int __init zc_init(void)
226 {
227         return hid_register_driver(&zc_driver);
228 }
229
230 static void __exit zc_exit(void)
231 {
232         hid_unregister_driver(&zc_driver);
233 }
234
235 module_init(zc_init);
236 module_exit(zc_exit);
237 MODULE_LICENSE("GPL");