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
af9005_rc_decode(struct dvb_usb_device * d,u8 * data,int len,u32 * event,int * state)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(&rc_map_af9005_table[i]) == cust
122 && rc5_data(&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