1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* DVB USB compliant Linux driver for the Afatech 9005 |
3 | * USB1.1 DVB-T receiver. |
4 | * |
5 | * Standard remote decode function |
6 | * |
7 | * Copyright (C) 2007 Luca Olivetti (luca@ventoso.org) |
8 | * |
9 | * Thanks to Afatech who kindly provided information. |
10 | * |
11 | * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information |
12 | */ |
13 | #include "af9005.h" |
14 | /* debug */ |
15 | static int dvb_usb_af9005_remote_debug; |
16 | module_param_named(debug, dvb_usb_af9005_remote_debug, int, 0644); |
17 | MODULE_PARM_DESC(debug, |
18 | "enable (1) or disable (0) debug messages." |
19 | DVB_USB_DEBUG_STATUS); |
20 | |
21 | #define deb_decode(args...) dprintk(dvb_usb_af9005_remote_debug,0x01,args) |
22 | |
23 | struct rc_map_table rc_map_af9005_table[] = { |
24 | |
25 | {0x01b7, KEY_POWER}, |
26 | {0x01a7, KEY_VOLUMEUP}, |
27 | {0x0187, KEY_CHANNELUP}, |
28 | {0x017f, KEY_MUTE}, |
29 | {0x01bf, KEY_VOLUMEDOWN}, |
30 | {0x013f, KEY_CHANNELDOWN}, |
31 | {0x01df, KEY_1}, |
32 | {0x015f, KEY_2}, |
33 | {0x019f, KEY_3}, |
34 | {0x011f, KEY_4}, |
35 | {0x01ef, KEY_5}, |
36 | {0x016f, KEY_6}, |
37 | {0x01af, KEY_7}, |
38 | {0x0127, KEY_8}, |
39 | {0x0107, KEY_9}, |
40 | {0x01cf, KEY_ZOOM}, |
41 | {0x014f, KEY_0}, |
42 | {0x018f, KEY_GOTO}, /* marked jump on the remote */ |
43 | |
44 | {0x00bd, KEY_POWER}, |
45 | {0x007d, KEY_VOLUMEUP}, |
46 | {0x00fd, KEY_CHANNELUP}, |
47 | {0x009d, KEY_MUTE}, |
48 | {0x005d, KEY_VOLUMEDOWN}, |
49 | {0x00dd, KEY_CHANNELDOWN}, |
50 | {0x00ad, KEY_1}, |
51 | {0x006d, KEY_2}, |
52 | {0x00ed, KEY_3}, |
53 | {0x008d, KEY_4}, |
54 | {0x004d, KEY_5}, |
55 | {0x00cd, KEY_6}, |
56 | {0x00b5, KEY_7}, |
57 | {0x0075, KEY_8}, |
58 | {0x00f5, KEY_9}, |
59 | {0x0095, KEY_ZOOM}, |
60 | {0x0055, KEY_0}, |
61 | {0x00d5, KEY_GOTO}, /* marked jump on the remote */ |
62 | }; |
63 | |
64 | int rc_map_af9005_table_size = ARRAY_SIZE(rc_map_af9005_table); |
65 | |
66 | static int repeatable_keys[] = { |
67 | KEY_VOLUMEUP, |
68 | KEY_VOLUMEDOWN, |
69 | KEY_CHANNELUP, |
70 | KEY_CHANNELDOWN |
71 | }; |
72 | |
73 | int af9005_rc_decode(struct dvb_usb_device *d, u8 * data, int len, u32 * event, |
74 | int *state) |
75 | { |
76 | u16 mark, space; |
77 | u32 result; |
78 | u8 cust, dat, invdat; |
79 | int i; |
80 | |
81 | if (len >= 6) { |
82 | mark = (u16) (data[0] << 8) + data[1]; |
83 | space = (u16) (data[2] << 8) + data[3]; |
84 | if (space * 3 < mark) { |
85 | for (i = 0; i < ARRAY_SIZE(repeatable_keys); i++) { |
86 | if (d->last_event == repeatable_keys[i]) { |
87 | *state = REMOTE_KEY_REPEAT; |
88 | *event = d->last_event; |
89 | deb_decode("repeat key, event %x\n" , |
90 | *event); |
91 | return 0; |
92 | } |
93 | } |
94 | deb_decode("repeated key ignored (non repeatable)\n" ); |
95 | return 0; |
96 | } else if (len >= 33 * 4) { /*32 bits + start code */ |
97 | result = 0; |
98 | for (i = 4; i < 4 + 32 * 4; i += 4) { |
99 | result <<= 1; |
100 | mark = (u16) (data[i] << 8) + data[i + 1]; |
101 | mark >>= 1; |
102 | space = (u16) (data[i + 2] << 8) + data[i + 3]; |
103 | space >>= 1; |
104 | if (mark * 2 > space) |
105 | result += 1; |
106 | } |
107 | deb_decode("key pressed, raw value %x\n" , result); |
108 | if ((result & 0xff000000) != 0xfe000000) { |
109 | deb_decode |
110 | ("doesn't start with 0xfe, ignored\n" ); |
111 | return 0; |
112 | } |
113 | cust = (result >> 16) & 0xff; |
114 | dat = (result >> 8) & 0xff; |
115 | invdat = (~result) & 0xff; |
116 | if (dat != invdat) { |
117 | deb_decode("code != inverted code\n" ); |
118 | return 0; |
119 | } |
120 | for (i = 0; i < rc_map_af9005_table_size; i++) { |
121 | if (rc5_custom(key: &rc_map_af9005_table[i]) == cust |
122 | && rc5_data(key: &rc_map_af9005_table[i]) == dat) { |
123 | *event = rc_map_af9005_table[i].keycode; |
124 | *state = REMOTE_KEY_PRESSED; |
125 | deb_decode |
126 | ("key pressed, event %x\n" , *event); |
127 | return 0; |
128 | } |
129 | } |
130 | deb_decode("not found in table\n" ); |
131 | } |
132 | } |
133 | return 0; |
134 | } |
135 | |
136 | EXPORT_SYMBOL(rc_map_af9005_table); |
137 | EXPORT_SYMBOL(rc_map_af9005_table_size); |
138 | EXPORT_SYMBOL(af9005_rc_decode); |
139 | |
140 | MODULE_AUTHOR("Luca Olivetti <luca@ventoso.org>" ); |
141 | MODULE_DESCRIPTION |
142 | ("Standard remote control decoder for Afatech 9005 DVB-T USB1.1 stick" ); |
143 | MODULE_VERSION("1.0" ); |
144 | MODULE_LICENSE("GPL" ); |
145 | |