1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /* DVB USB compliant Linux driver for the Afatech 9005
3*4882a593Smuzhiyun * USB1.1 DVB-T receiver.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Standard remote decode function
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright (C) 2007 Luca Olivetti (luca@ventoso.org)
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Thanks to Afatech who kindly provided information.
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
12*4882a593Smuzhiyun */
13*4882a593Smuzhiyun #include "af9005.h"
14*4882a593Smuzhiyun /* debug */
15*4882a593Smuzhiyun static int dvb_usb_af9005_remote_debug;
16*4882a593Smuzhiyun module_param_named(debug, dvb_usb_af9005_remote_debug, int, 0644);
17*4882a593Smuzhiyun MODULE_PARM_DESC(debug,
18*4882a593Smuzhiyun "enable (1) or disable (0) debug messages."
19*4882a593Smuzhiyun DVB_USB_DEBUG_STATUS);
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #define deb_decode(args...) dprintk(dvb_usb_af9005_remote_debug,0x01,args)
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun struct rc_map_table rc_map_af9005_table[] = {
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun {0x01b7, KEY_POWER},
26*4882a593Smuzhiyun {0x01a7, KEY_VOLUMEUP},
27*4882a593Smuzhiyun {0x0187, KEY_CHANNELUP},
28*4882a593Smuzhiyun {0x017f, KEY_MUTE},
29*4882a593Smuzhiyun {0x01bf, KEY_VOLUMEDOWN},
30*4882a593Smuzhiyun {0x013f, KEY_CHANNELDOWN},
31*4882a593Smuzhiyun {0x01df, KEY_1},
32*4882a593Smuzhiyun {0x015f, KEY_2},
33*4882a593Smuzhiyun {0x019f, KEY_3},
34*4882a593Smuzhiyun {0x011f, KEY_4},
35*4882a593Smuzhiyun {0x01ef, KEY_5},
36*4882a593Smuzhiyun {0x016f, KEY_6},
37*4882a593Smuzhiyun {0x01af, KEY_7},
38*4882a593Smuzhiyun {0x0127, KEY_8},
39*4882a593Smuzhiyun {0x0107, KEY_9},
40*4882a593Smuzhiyun {0x01cf, KEY_ZOOM},
41*4882a593Smuzhiyun {0x014f, KEY_0},
42*4882a593Smuzhiyun {0x018f, KEY_GOTO}, /* marked jump on the remote */
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun {0x00bd, KEY_POWER},
45*4882a593Smuzhiyun {0x007d, KEY_VOLUMEUP},
46*4882a593Smuzhiyun {0x00fd, KEY_CHANNELUP},
47*4882a593Smuzhiyun {0x009d, KEY_MUTE},
48*4882a593Smuzhiyun {0x005d, KEY_VOLUMEDOWN},
49*4882a593Smuzhiyun {0x00dd, KEY_CHANNELDOWN},
50*4882a593Smuzhiyun {0x00ad, KEY_1},
51*4882a593Smuzhiyun {0x006d, KEY_2},
52*4882a593Smuzhiyun {0x00ed, KEY_3},
53*4882a593Smuzhiyun {0x008d, KEY_4},
54*4882a593Smuzhiyun {0x004d, KEY_5},
55*4882a593Smuzhiyun {0x00cd, KEY_6},
56*4882a593Smuzhiyun {0x00b5, KEY_7},
57*4882a593Smuzhiyun {0x0075, KEY_8},
58*4882a593Smuzhiyun {0x00f5, KEY_9},
59*4882a593Smuzhiyun {0x0095, KEY_ZOOM},
60*4882a593Smuzhiyun {0x0055, KEY_0},
61*4882a593Smuzhiyun {0x00d5, KEY_GOTO}, /* marked jump on the remote */
62*4882a593Smuzhiyun };
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun int rc_map_af9005_table_size = ARRAY_SIZE(rc_map_af9005_table);
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun static int repeatable_keys[] = {
67*4882a593Smuzhiyun KEY_VOLUMEUP,
68*4882a593Smuzhiyun KEY_VOLUMEDOWN,
69*4882a593Smuzhiyun KEY_CHANNELUP,
70*4882a593Smuzhiyun KEY_CHANNELDOWN
71*4882a593Smuzhiyun };
72*4882a593Smuzhiyun
af9005_rc_decode(struct dvb_usb_device * d,u8 * data,int len,u32 * event,int * state)73*4882a593Smuzhiyun int af9005_rc_decode(struct dvb_usb_device *d, u8 * data, int len, u32 * event,
74*4882a593Smuzhiyun int *state)
75*4882a593Smuzhiyun {
76*4882a593Smuzhiyun u16 mark, space;
77*4882a593Smuzhiyun u32 result;
78*4882a593Smuzhiyun u8 cust, dat, invdat;
79*4882a593Smuzhiyun int i;
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun if (len >= 6) {
82*4882a593Smuzhiyun mark = (u16) (data[0] << 8) + data[1];
83*4882a593Smuzhiyun space = (u16) (data[2] << 8) + data[3];
84*4882a593Smuzhiyun if (space * 3 < mark) {
85*4882a593Smuzhiyun for (i = 0; i < ARRAY_SIZE(repeatable_keys); i++) {
86*4882a593Smuzhiyun if (d->last_event == repeatable_keys[i]) {
87*4882a593Smuzhiyun *state = REMOTE_KEY_REPEAT;
88*4882a593Smuzhiyun *event = d->last_event;
89*4882a593Smuzhiyun deb_decode("repeat key, event %x\n",
90*4882a593Smuzhiyun *event);
91*4882a593Smuzhiyun return 0;
92*4882a593Smuzhiyun }
93*4882a593Smuzhiyun }
94*4882a593Smuzhiyun deb_decode("repeated key ignored (non repeatable)\n");
95*4882a593Smuzhiyun return 0;
96*4882a593Smuzhiyun } else if (len >= 33 * 4) { /*32 bits + start code */
97*4882a593Smuzhiyun result = 0;
98*4882a593Smuzhiyun for (i = 4; i < 4 + 32 * 4; i += 4) {
99*4882a593Smuzhiyun result <<= 1;
100*4882a593Smuzhiyun mark = (u16) (data[i] << 8) + data[i + 1];
101*4882a593Smuzhiyun mark >>= 1;
102*4882a593Smuzhiyun space = (u16) (data[i + 2] << 8) + data[i + 3];
103*4882a593Smuzhiyun space >>= 1;
104*4882a593Smuzhiyun if (mark * 2 > space)
105*4882a593Smuzhiyun result += 1;
106*4882a593Smuzhiyun }
107*4882a593Smuzhiyun deb_decode("key pressed, raw value %x\n", result);
108*4882a593Smuzhiyun if ((result & 0xff000000) != 0xfe000000) {
109*4882a593Smuzhiyun deb_decode
110*4882a593Smuzhiyun ("doesn't start with 0xfe, ignored\n");
111*4882a593Smuzhiyun return 0;
112*4882a593Smuzhiyun }
113*4882a593Smuzhiyun cust = (result >> 16) & 0xff;
114*4882a593Smuzhiyun dat = (result >> 8) & 0xff;
115*4882a593Smuzhiyun invdat = (~result) & 0xff;
116*4882a593Smuzhiyun if (dat != invdat) {
117*4882a593Smuzhiyun deb_decode("code != inverted code\n");
118*4882a593Smuzhiyun return 0;
119*4882a593Smuzhiyun }
120*4882a593Smuzhiyun for (i = 0; i < rc_map_af9005_table_size; i++) {
121*4882a593Smuzhiyun if (rc5_custom(&rc_map_af9005_table[i]) == cust
122*4882a593Smuzhiyun && rc5_data(&rc_map_af9005_table[i]) == dat) {
123*4882a593Smuzhiyun *event = rc_map_af9005_table[i].keycode;
124*4882a593Smuzhiyun *state = REMOTE_KEY_PRESSED;
125*4882a593Smuzhiyun deb_decode
126*4882a593Smuzhiyun ("key pressed, event %x\n", *event);
127*4882a593Smuzhiyun return 0;
128*4882a593Smuzhiyun }
129*4882a593Smuzhiyun }
130*4882a593Smuzhiyun deb_decode("not found in table\n");
131*4882a593Smuzhiyun }
132*4882a593Smuzhiyun }
133*4882a593Smuzhiyun return 0;
134*4882a593Smuzhiyun }
135*4882a593Smuzhiyun
136*4882a593Smuzhiyun EXPORT_SYMBOL(rc_map_af9005_table);
137*4882a593Smuzhiyun EXPORT_SYMBOL(rc_map_af9005_table_size);
138*4882a593Smuzhiyun EXPORT_SYMBOL(af9005_rc_decode);
139*4882a593Smuzhiyun
140*4882a593Smuzhiyun MODULE_AUTHOR("Luca Olivetti <luca@ventoso.org>");
141*4882a593Smuzhiyun MODULE_DESCRIPTION
142*4882a593Smuzhiyun ("Standard remote control decoder for Afatech 9005 DVB-T USB1.1 stick");
143*4882a593Smuzhiyun MODULE_VERSION("1.0");
144*4882a593Smuzhiyun MODULE_LICENSE("GPL");
145