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/*
* This file is part of the coreboot project.
*
* 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.
*/
#include <amdblocks/acpimmio.h>
#include <bootblock_common.h>
#include <device/pnp_type.h>
#include <superio/winbond/common/winbond.h>
#include <superio/winbond/w83627uhg/w83627uhg.h>
#define SERIAL_DEV PNP_DEV(0x2e, W83627UHG_SP1)
void bootblock_mainboard_early_init(void)
{
/* Disable PCI-PCI bridge and release GPIO32/33 for other uses. */
pm_write8(0xea, 0x1);
/* Set auxiliary output clock frequency on OSCOUT1 pin to be 48MHz */
misc_write32(0x28, misc_read32(0x28) & 0xfff8ffff);
/* Enable Auxiliary Clock1, disable FCH 14 MHz OscClk */
misc_write32(0x40, misc_read32(0x40) & 0xffffbffb);
/* w83627uhg has a default clk of 48MHz, p.9 of data-sheet */
winbond_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE);
}
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