summaryrefslogtreecommitdiffstats
path: root/drivers/media/usb/dvb-usb/af9005-remote.c
blob: f7cdcc8424a821aa872318bc4c423158d0d27441 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
/* DVB USB compliant Linux driver for the Afatech 9005
 * USB1.1 DVB-T receiver.
 *
 * Standard remote decode function
 *
 * Copyright (C) 2007 Luca Olivetti (luca@ventoso.org)
 *
 * Thanks to Afatech who kindly provided information.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * see Documentation/media/dvb-drivers/dvb-usb.rst for more information
 */
#include "af9005.h"
/* debug */
static int dvb_usb_af9005_remote_debug;
module_param_named(debug, dvb_usb_af9005_remote_debug, int, 0644);
MODULE_PARM_DESC(debug,
		 "enable (1) or disable (0) debug messages."
		 DVB_USB_DEBUG_STATUS);

#define deb_decode(args...)   dprintk(dvb_usb_af9005_remote_debug,0x01,args)

struct rc_map_table rc_map_af9005_table[] = {

	{0x01b7, KEY_POWER},
	{0x01a7, KEY_VOLUMEUP},
	{0x0187, KEY_CHANNELUP},
	{0x017f, KEY_MUTE},
	{0x01bf, KEY_VOLUMEDOWN},
	{0x013f, KEY_CHANNELDOWN},
	{0x01df, KEY_1},
	{0x015f, KEY_2},
	{0x019f, KEY_3},
	{0x011f, KEY_4},
	{0x01ef, KEY_5},
	{0x016f, KEY_6},
	{0x01af, KEY_7},
	{0x0127, KEY_8},
	{0x0107, KEY_9},
	{0x01cf, KEY_ZOOM},
	{0x014f, KEY_0},
	{0x018f, KEY_GOTO},	/* marked jump on the remote */

	{0x00bd, KEY_POWER},
	{0x007d, KEY_VOLUMEUP},
	{0x00fd, KEY_CHANNELUP},
	{0x009d, KEY_MUTE},
	{0x005d, KEY_VOLUMEDOWN},
	{0x00dd, KEY_CHANNELDOWN},
	{0x00ad, KEY_1},
	{0x006d, KEY_2},
	{0x00ed, KEY_3},
	{0x008d, KEY_4},
	{0x004d, KEY_5},
	{0x00cd, KEY_6},
	{0x00b5, KEY_7},
	{0x0075, KEY_8},
	{0x00f5, KEY_9},
	{0x0095, KEY_ZOOM},
	{0x0055, KEY_0},
	{0x00d5, KEY_GOTO},	/* marked jump on the remote */
};

int rc_map_af9005_table_size = ARRAY_SIZE(rc_map_af9005_table);

static int repeatable_keys[] = {
	KEY_VOLUMEUP,
	KEY_VOLUMEDOWN,
	KEY_CHANNELUP,
	KEY_CHANNELDOWN
};

int af9005_rc_decode(struct dvb_usb_device *d, u8 * data, int len, u32 * event,
		     int *state)
{
	u16 mark, space;
	u32 result;
	u8 cust, dat, invdat;
	int i;

	if (len >= 6) {
		mark = (u16) (data[0] << 8) + data[1];
		space = (u16) (data[2] << 8) + data[3];
		if (space * 3 < mark) {
			for (i = 0; i < ARRAY_SIZE(repeatable_keys); i++) {
				if (d->last_event == repeatable_keys[i]) {
					*state = REMOTE_KEY_REPEAT;
					*event = d->last_event;
					deb_decode("repeat key, event %x\n",
						   *event);
					return 0;
				}
			}
			deb_decode("repeated key ignored (non repeatable)\n");
			return 0;
		} else if (len >= 33 * 4) {	/*32 bits + start code */
			result = 0;
			for (i = 4; i < 4 + 32 * 4; i += 4) {
				result <<= 1;
				mark = (u16) (data[i] << 8) + data[i + 1];
				mark >>= 1;
				space = (u16) (data[i + 2] << 8) + data[i + 3];
				space >>= 1;
				if (mark * 2 > space)
					result += 1;
			}
			deb_decode("key pressed, raw value %x\n", result);
			if ((result & 0xff000000) != 0xfe000000) {
				deb_decode
				    ("doesn't start with 0xfe, ignored\n");
				return 0;
			}
			cust = (result >> 16) & 0xff;
			dat = (result >> 8) & 0xff;
			invdat = (~result) & 0xff;
			if (dat != invdat) {
				deb_decode("code != inverted code\n");
				return 0;
			}
			for (i = 0; i < rc_map_af9005_table_size; i++) {
				if (rc5_custom(&rc_map_af9005_table[i]) == cust
				    && rc5_data(&rc_map_af9005_table[i]) == dat) {
					*event = rc_map_af9005_table[i].keycode;
					*state = REMOTE_KEY_PRESSED;
					deb_decode
					    ("key pressed, event %x\n", *event);
					return 0;
				}
			}
			deb_decode("not found in table\n");
		}
	}
	return 0;
}

EXPORT_SYMBOL(rc_map_af9005_table);
EXPORT_SYMBOL(rc_map_af9005_table_size);
EXPORT_SYMBOL(af9005_rc_decode);

MODULE_AUTHOR("Luca Olivetti <luca@ventoso.org>");
MODULE_DESCRIPTION
    ("Standard remote control decoder for Afatech 9005 DVB-T USB1.1 stick");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");