blob: f921fb51b78e0a70e2ac4cbb913901347476da58 [file] [log] [blame]
* This file is part of the coreboot project.
* Copyright (C) 2004 Tyan Computer
* Written by Yinghai Lu <> for Tyan Computer.
* Copyright (C) 2006,2007 AMD
* Written by Yinghai Lu <> for AMD.
* Copyright (C) 2007 Silicon Integrated Systems Corp. (SiS)
* Written by Morgan Tsai <> for SiS.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#include <device/smbus_def.h>
#define SMBHSTSTAT 0x1
#define SMBHSTPRTCL 0x0
#define SMBHSTCMD 0x3
#define SMBXMITADD 0x2
#define SMBHSTDAT0 0x4
#define SMBHSTDAT1 0x5
/* Between 1-10 seconds, We should never timeout normally
* Longer than this is just painful when a timeout condition occurs.
#define SMBUS_TIMEOUT (100*1000*10)
int smbus_wait_until_ready(unsigned smbus_io_base);
int smbus_wait_until_done(unsigned smbus_io_base);
int do_smbus_recv_byte(unsigned smbus_io_base, unsigned device);
int do_smbus_send_byte(unsigned smbus_io_base, unsigned device, unsigned char val);
int smbus_read_byte(unsigned device, unsigned address);
int smbus_write_byte(unsigned device, unsigned address, unsigned char val);