1 /*- 2 * Copyright (c) 1998 Nicolas Souchu 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/dev/smbus/smb.h,v 1.4.8.1 2006/09/22 19:19:16 jhb Exp $ 27 * $DragonFly: src/sys/platform/pc32/include/smb.h,v 1.4 2006/05/20 02:42:06 dillon Exp $ 28 * 29 */ 30 #ifndef __SMB_H 31 #define __SMB_H 32 33 #include <sys/ioccom.h> 34 35 struct smbcmd { 36 u_char cmd; 37 u_char reserved; 38 u_short op; 39 union { 40 char byte; 41 char buf[2]; 42 short word; 43 } wdata; 44 union { 45 char byte; 46 char buf[2]; 47 short word; 48 } rdata; 49 int slave; 50 char *wbuf; /* use wdata if NULL */ 51 int wcount; /* max 255 bytes */ 52 char *rbuf; /* use rdata if NULL */ 53 int rcount; /* max 255 bytes */ 54 }; 55 56 /* 57 * SMBus spec 2.0 says block transfers may be at most 32 bytes. 58 * We usse SMBus for i2c as well, make the size limit something more 59 * reasonable. Keep in mind that a char buf array is declared on the 60 * kernel stack. 61 */ 62 #define SMB_MAXBLOCKSIZE 1024 63 64 #define SMB_QUICK_WRITE _IOW('i', 1, struct smbcmd) 65 #define SMB_QUICK_READ _IOW('i', 2, struct smbcmd) 66 #define SMB_SENDB _IOWR('i', 3, struct smbcmd) 67 #define SMB_RECVB _IOWR('i', 4, struct smbcmd) 68 #define SMB_WRITEB _IOWR('i', 5, struct smbcmd) 69 #define SMB_WRITEW _IOWR('i', 6, struct smbcmd) 70 #define SMB_READB _IOWR('i', 7, struct smbcmd) 71 #define SMB_READW _IOWR('i', 8, struct smbcmd) 72 #define SMB_PCALL _IOWR('i', 9, struct smbcmd) 73 #define SMB_BWRITE _IOWR('i', 10, struct smbcmd) 74 #define SMB_BREAD _IOWR('i', 11, struct smbcmd) 75 #define SMB_TRANS _IOWR('i', 12, struct smbcmd) 76 77 #endif 78