1 /* $NetBSD: sir.h,v 1.7 2008/04/28 20:23:51 martin Exp $ */ 2 3 /* 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart@augustsson.net) and Tommy Bohlin 9 * (tommy@gatespace.com). 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Framing originally written by Tommy Bohlin. 35 */ 36 37 /* Protocol constants */ 38 #define SIR_EXTRA_BOF 0xff 39 #define SIR_BOF 0xc0 40 #define SIR_CE 0x7d 41 #define SIR_EOF 0xc1 42 43 #define SIR_ESC_BIT 0x20 44 45 int irda_sir_frame(u_int8_t *, u_int, struct uio *, u_int); 46 47 /* 48 * CRC computation 49 */ 50 #define INITFCS 0xffff 51 #define GOODFCS 0xf0b8 52 53 extern const u_int16_t irda_fcstab[]; 54 55 static __inline u_int16_t updateFCS(u_int16_t fcs, int c) { 56 return (fcs >> 8) ^ irda_fcstab[(fcs^c) & 0xff]; 57 } 58