// SPDX-License-Identifier: GPL-2.0-or-later /* 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. * * see Documentation/driver-api/media/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 "); MODULE_DESCRIPTION ("Standard remote control decoder for Afatech 9005 DVB-T USB1.1 stick"); MODULE_VERSION("1.0"); MODULE_LICENSE("GPL");