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1// SPDX-License-Identifier: GPL-2.0-or-later2/* DVB USB compliant Linux driver for the Afatech 90053 * USB1.1 DVB-T receiver.4 *5 * Standard remote decode function6 *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 information12 */13#include "af9005.h"14/* debug */15static int dvb_usb_af9005_remote_debug;16module_param_named(debug, dvb_usb_af9005_remote_debug, int, 0644);17MODULE_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 23struct 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 64int rc_map_af9005_table_size = ARRAY_SIZE(rc_map_af9005_table);65 66static int repeatable_keys[] = {67 KEY_VOLUMEUP,68 KEY_VOLUMEDOWN,69 KEY_CHANNELUP,70 KEY_CHANNELDOWN71};72 73int 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_decode110 ("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]) == cust122 && rc5_data(&rc_map_af9005_table[i]) == dat) {123 *event = rc_map_af9005_table[i].keycode;124 *state = REMOTE_KEY_PRESSED;125 deb_decode126 ("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 136EXPORT_SYMBOL(rc_map_af9005_table);137EXPORT_SYMBOL(rc_map_af9005_table_size);138EXPORT_SYMBOL(af9005_rc_decode);139 140MODULE_AUTHOR("Luca Olivetti <luca@ventoso.org>");141MODULE_DESCRIPTION142 ("Standard remote control decoder for Afatech 9005 DVB-T USB1.1 stick");143MODULE_VERSION("1.0");144MODULE_LICENSE("GPL");145