1 /* DVB USB compliant Linux driver for the Afatech 9005
2 * USB1.1 DVB-T receiver.
3 *
4 * Standard remote decode function
5 *
6 * Copyright (C) 2007 Luca Olivetti (luca@ventoso.org)
7 *
8 * Thanks to Afatech who kindly provided information.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 *
24 * see Documentation/dvb/REDME.dvb-usb for more information
25 */
26 #include "af9005.h"
27 /* debug */
28 int dvb_usb_af9005_remote_debug;
29 module_param_named(debug, dvb_usb_af9005_remote_debug, int, 0644);
30 MODULE_PARM_DESC(debug,
31 "enable (1) or disable (0) debug messages."
32 DVB_USB_DEBUG_STATUS);
33
34 #define deb_decode(args...) dprintk(dvb_usb_af9005_remote_debug,0x01,args)
35
36 struct dvb_usb_rc_key af9005_rc_keys[] = {
37
38 {0x01, 0xb7, KEY_POWER},
39 {0x01, 0xa7, KEY_VOLUMEUP},
40 {0x01, 0x87, KEY_CHANNELUP},
41 {0x01, 0x7f, KEY_MUTE},
42 {0x01, 0xbf, KEY_VOLUMEDOWN},
43 {0x01, 0x3f, KEY_CHANNELDOWN},
44 {0x01, 0xdf, KEY_1},
45 {0x01, 0x5f, KEY_2},
46 {0x01, 0x9f, KEY_3},
47 {0x01, 0x1f, KEY_4},
48 {0x01, 0xef, KEY_5},
49 {0x01, 0x6f, KEY_6},
50 {0x01, 0xaf, KEY_7},
51 {0x01, 0x27, KEY_8},
52 {0x01, 0x07, KEY_9},
53 {0x01, 0xcf, KEY_ZOOM},
54 {0x01, 0x4f, KEY_0},
55 {0x01, 0x8f, KEY_GOTO}, /* marked jump on the remote */
56
57 {0x00, 0xbd, KEY_POWER},
58 {0x00, 0x7d, KEY_VOLUMEUP},
59 {0x00, 0xfd, KEY_CHANNELUP},
60 {0x00, 0x9d, KEY_MUTE},
61 {0x00, 0x5d, KEY_VOLUMEDOWN},
62 {0x00, 0xdd, KEY_CHANNELDOWN},
63 {0x00, 0xad, KEY_1},
64 {0x00, 0x6d, KEY_2},
65 {0x00, 0xed, KEY_3},
66 {0x00, 0x8d, KEY_4},
67 {0x00, 0x4d, KEY_5},
68 {0x00, 0xcd, KEY_6},
69 {0x00, 0xb5, KEY_7},
70 {0x00, 0x75, KEY_8},
71 {0x00, 0xf5, KEY_9},
72 {0x00, 0x95, KEY_ZOOM},
73 {0x00, 0x55, KEY_0},
74 {0x00, 0xd5, KEY_GOTO}, /* marked jump on the remote */
75 };
76
77 int af9005_rc_keys_size = ARRAY_SIZE(af9005_rc_keys);
78
79 static int repeatable_keys[] = {
80 KEY_VOLUMEUP,
81 KEY_VOLUMEDOWN,
82 KEY_CHANNELUP,
83 KEY_CHANNELDOWN
84 };
85
86 int af9005_rc_decode(struct dvb_usb_device *d, u8 * data, int len, u32 * event,
87 int *state)
88 {
89 u16 mark, space;
90 u32 result;
91 u8 cust, dat, invdat;
92 int i;
93
94 if (len >= 6) {
95 mark = (u16) (data[0] << 8) + data[1];
96 space = (u16) (data[2] << 8) + data[3];
97 if (space * 3 < mark) {
98 for (i = 0; i < ARRAY_SIZE(repeatable_keys); i++) {
99 if (d->last_event == repeatable_keys[i]) {
100 *state = REMOTE_KEY_REPEAT;
101 *event = d->last_event;
102 deb_decode("repeat key, event %x\n",
103 *event);
104 return 0;
105 }
106 }
107 deb_decode("repeated key ignored (non repeatable)\n");
108 return 0;
109 } else if (len >= 33 * 4) { /*32 bits + start code */
110 result = 0;
111 for (i = 4; i < 4 + 32 * 4; i += 4) {
112 result <<= 1;
113 mark = (u16) (data[i] << 8) + data[i + 1];
114 mark >>= 1;
115 space = (u16) (data[i + 2] << 8) + data[i + 3];
116 space >>= 1;
117 if (mark * 2 > space)
118 result += 1;
119 }
120 deb_decode("key pressed, raw value %x\n", result);
121 if ((result & 0xff000000) != 0xfe000000) {
122 deb_decode
123 ("doesn't start with 0xfe, ignored\n");
124 return 0;
125 }
126 cust = (result >> 16) & 0xff;
127 dat = (result >> 8) & 0xff;
128 invdat = (~result) & 0xff;
129 if (dat != invdat) {
130 deb_decode("code != inverted code\n");
131 return 0;
132 }
133 for (i = 0; i < af9005_rc_keys_size; i++) {
134 if (af9005_rc_keys[i].custom == cust
135 && af9005_rc_keys[i].data == dat) {
136 *event = af9005_rc_keys[i].event;
137 *state = REMOTE_KEY_PRESSED;
138 deb_decode
139 ("key pressed, event %x\n", *event);
140 return 0;
141 }
142 }
143 deb_decode("not found in table\n");
144 }
145 }
146 return 0;
147 }
148
149 EXPORT_SYMBOL(af9005_rc_keys);
150 EXPORT_SYMBOL(af9005_rc_keys_size);
151 EXPORT_SYMBOL(af9005_rc_decode);
152
153 MODULE_AUTHOR("Luca Olivetti <luca@ventoso.org>");
154 MODULE_DESCRIPTION
155 ("Standard remote control decoder for Afatech 9005 DVB-T USB1.1 stick");
156 MODULE_VERSION("1.0");
157 MODULE_LICENSE("GPL");
158
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