src/southbridge/via/common/via_early_smbus.h

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2013  Alexandru Gagniuc <mr.nuke.me@gmail.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 /**
  18  * @file via_early_smbus.h
  19  *
  20  * This file contains generic definitions used in VIA SMBus controllers.
  21  *
  22  * Functions defined in device/early/smbus.h are each implemented in a separate
  23  * early_smbus_[func_name].c file. This makes it possible to override any of
  24  * these functions by not including them in your build, via Makefile.c. This is
  25  * useful when there is a need to work around chipset bugs.
  26  *
  27  * These implementations work with most via chipsets. Any VIA port should try
  28  * to use these. Makefile.inc needs to be adapted to link against the files
  29  * providing SMBus functionality:
  30  * @code
  31  *      romstage-y += ./../../../southbridge/via/common/early_smbus_func.c
  32  * @endcode
  33  */
  34
  35 /**
  36  * \brief SMBus IO ports in relation to the base IO port
  37  */
  38 #define SMBHSTSTAT(base)                ((u16)base + 0x0)
  39 #define SMBSLVSTAT(base)                ((u16)base + 0x1)
  40 #define SMBHSTCTL(base)                 ((u16)base + 0x2)
  41 #define SMBHSTCMD(base)                 ((u16)base + 0x3)
  42 #define SMBXMITADD(base)                ((u16)base + 0x4)
  43 #define SMBHSTDAT0(base)                ((u16)base + 0x5)
  44 #define SMBHSTDAT1(base)                ((u16)base + 0x6)
  45 #define SMBBLKDAT(base)                 ((u16)base + 0x7)
  46 #define SMBSLVCTL(base)                 ((u16)base + 0x8)
  47 #define SMBTRNSADD(base)                ((u16)base + 0x9)
  48 #define SMBSLVDATA (base)               ((u16)base + 0xa)
  49
  50 #define SMBUS_TIMEOUT                   (100*1000*10)
  51
  52 #include <device/early_smbus.h>
  53 #include <arch/io.h>