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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2004 Tyan Computer
* Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer.
*
* 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; version 2 of the License.
*
* 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.
*
* 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 "ck804_smbus.h"
#define SMBUS_IO_BASE 0x1000
static void enable_smbus(void)
{
device_t dev;
dev = pci_locate_device(PCI_ID(0x10de, 0x0052), 0);
if (dev == PCI_DEV_INVALID)
die("SMBus controller not found\n");
print_debug("SMBus controller enabled\n");
/* Set SMBus I/O base. */
pci_write_config32(dev, 0x20, SMBUS_IO_BASE | 1);
/* Set SMBus I/O space enable. */
pci_write_config16(dev, 0x4, 0x01);
/* Clear any lingering errors, so the transaction will run. */
outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
}
static int smbus_read_byte(unsigned device, unsigned address)
{
return do_smbus_read_byte(SMBUS_IO_BASE, device, address);
}
static inline int smbus_write_byte(unsigned device, unsigned address,
unsigned char val)
{
return do_smbus_write_byte(SMBUS_IO_BASE, device, address, val);
}
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