 val, tone;   dprintk("\n");   /* stop continuous tone if enabled */  tone = cx00000_readreg(state, 0x00);  if (tone & 0x00)   cx00000_writereg(state, 0x00, tone & ~0x00);   /* wait for diseqc queue ready */  cx00000_wait_for_diseqc(state);   /* select tone mode */  cx00000_writereg(state, 0x0a, cx00000_readreg(state, 0x0a) & 0xfb);   