158 lines
4.3 KiB
C
158 lines
4.3 KiB
C
/* DVB USB compliant Linux driver for the Afatech 9005
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* USB1.1 DVB-T receiver.
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*
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* Standard remote decode function
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*
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* Copyright (C) 2007 Luca Olivetti (luca@ventoso.org)
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*
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* Thanks to Afatech who kindly provided information.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* see Documentation/dvb/REDME.dvb-usb for more information
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*/
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#include "af9005.h"
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/* debug */
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static int dvb_usb_af9005_remote_debug;
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module_param_named(debug, dvb_usb_af9005_remote_debug, int, 0644);
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MODULE_PARM_DESC(debug,
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"enable (1) or disable (0) debug messages."
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DVB_USB_DEBUG_STATUS);
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#define deb_decode(args...) dprintk(dvb_usb_af9005_remote_debug,0x01,args)
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struct dvb_usb_rc_key af9005_rc_keys[] = {
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{0x01, 0xb7, KEY_POWER},
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{0x01, 0xa7, KEY_VOLUMEUP},
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{0x01, 0x87, KEY_CHANNELUP},
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{0x01, 0x7f, KEY_MUTE},
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{0x01, 0xbf, KEY_VOLUMEDOWN},
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{0x01, 0x3f, KEY_CHANNELDOWN},
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{0x01, 0xdf, KEY_1},
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{0x01, 0x5f, KEY_2},
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{0x01, 0x9f, KEY_3},
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{0x01, 0x1f, KEY_4},
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{0x01, 0xef, KEY_5},
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{0x01, 0x6f, KEY_6},
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{0x01, 0xaf, KEY_7},
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{0x01, 0x27, KEY_8},
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{0x01, 0x07, KEY_9},
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{0x01, 0xcf, KEY_ZOOM},
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{0x01, 0x4f, KEY_0},
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{0x01, 0x8f, KEY_GOTO}, /* marked jump on the remote */
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{0x00, 0xbd, KEY_POWER},
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{0x00, 0x7d, KEY_VOLUMEUP},
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{0x00, 0xfd, KEY_CHANNELUP},
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{0x00, 0x9d, KEY_MUTE},
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{0x00, 0x5d, KEY_VOLUMEDOWN},
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{0x00, 0xdd, KEY_CHANNELDOWN},
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{0x00, 0xad, KEY_1},
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{0x00, 0x6d, KEY_2},
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{0x00, 0xed, KEY_3},
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{0x00, 0x8d, KEY_4},
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{0x00, 0x4d, KEY_5},
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{0x00, 0xcd, KEY_6},
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{0x00, 0xb5, KEY_7},
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{0x00, 0x75, KEY_8},
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{0x00, 0xf5, KEY_9},
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{0x00, 0x95, KEY_ZOOM},
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{0x00, 0x55, KEY_0},
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{0x00, 0xd5, KEY_GOTO}, /* marked jump on the remote */
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};
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int af9005_rc_keys_size = ARRAY_SIZE(af9005_rc_keys);
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static int repeatable_keys[] = {
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KEY_VOLUMEUP,
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KEY_VOLUMEDOWN,
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KEY_CHANNELUP,
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KEY_CHANNELDOWN
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};
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int af9005_rc_decode(struct dvb_usb_device *d, u8 * data, int len, u32 * event,
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int *state)
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{
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u16 mark, space;
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u32 result;
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u8 cust, dat, invdat;
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int i;
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if (len >= 6) {
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mark = (u16) (data[0] << 8) + data[1];
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space = (u16) (data[2] << 8) + data[3];
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if (space * 3 < mark) {
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for (i = 0; i < ARRAY_SIZE(repeatable_keys); i++) {
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if (d->last_event == repeatable_keys[i]) {
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*state = REMOTE_KEY_REPEAT;
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*event = d->last_event;
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deb_decode("repeat key, event %x\n",
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*event);
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return 0;
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}
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}
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deb_decode("repeated key ignored (non repeatable)\n");
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return 0;
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} else if (len >= 33 * 4) { /*32 bits + start code */
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result = 0;
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for (i = 4; i < 4 + 32 * 4; i += 4) {
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result <<= 1;
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mark = (u16) (data[i] << 8) + data[i + 1];
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mark >>= 1;
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space = (u16) (data[i + 2] << 8) + data[i + 3];
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space >>= 1;
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if (mark * 2 > space)
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result += 1;
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}
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deb_decode("key pressed, raw value %x\n", result);
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if ((result & 0xff000000) != 0xfe000000) {
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deb_decode
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("doesn't start with 0xfe, ignored\n");
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return 0;
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}
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cust = (result >> 16) & 0xff;
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dat = (result >> 8) & 0xff;
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invdat = (~result) & 0xff;
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if (dat != invdat) {
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deb_decode("code != inverted code\n");
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return 0;
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}
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for (i = 0; i < af9005_rc_keys_size; i++) {
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if (af9005_rc_keys[i].custom == cust
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&& af9005_rc_keys[i].data == dat) {
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*event = af9005_rc_keys[i].event;
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*state = REMOTE_KEY_PRESSED;
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deb_decode
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("key pressed, event %x\n", *event);
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return 0;
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}
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}
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deb_decode("not found in table\n");
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}
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}
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return 0;
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}
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EXPORT_SYMBOL(af9005_rc_keys);
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EXPORT_SYMBOL(af9005_rc_keys_size);
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EXPORT_SYMBOL(af9005_rc_decode);
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MODULE_AUTHOR("Luca Olivetti <luca@ventoso.org>");
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MODULE_DESCRIPTION
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("Standard remote control decoder for Afatech 9005 DVB-T USB1.1 stick");
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MODULE_VERSION("1.0");
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MODULE_LICENSE("GPL");
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