sys/dev/smbus/smb/smb.h

   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