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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@gmail.com>
*
* 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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "via_early_smbus.h"
/**
* \brief Print an error, should it occur. If no error, just exit.
*
* @param smbus_dev The base SMBus IO port
* @param host_status The data returned on the host status register after
* a transaction is processed.
* @param loops The number of times a transaction was attempted.
* @return 0 if no error occurred
* 1 if an error was detected
*/
int smbus_print_error(u32 smbus_dev, u8 host_status, int loops)
{
/* Check if there actually was an error. */
if ((host_status == 0x00 || host_status == 0x40 ||
host_status == 0x42) && (loops < SMBUS_TIMEOUT))
return 0;
if (loops >= SMBUS_TIMEOUT)
printsmbus("SMBus timeout\n");
if (host_status & (1 << 4))
printsmbus("Interrupt/SMI# was Failed Bus Transaction\n");
if (host_status & (1 << 3))
printsmbus("Bus error\n");
if (host_status & (1 << 2))
printsmbus("Device error\n");
if (host_status & (1 << 1))
printsmbus("Interrupt/SMI# completed successfully\n");
if (host_status & (1 << 0))
printsmbus("Host busy\n");
return 1;
}
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