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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Sage Electronic Engineering, LLC
*
* 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 <stdint.h>
#include <arch/io.h>
#include <southbridge/amd/cimx/sb800/SBPLATFORM.h>
#include <southbridge/amd/cimx/cimx_util.h>
#include "gpio_ftns.h"
uintptr_t find_gpio_base(void)
{
u8 pm_index, pm_data;
uintptr_t base_addr = 0;
/* Find the ACPImmioAddr base address */
for (pm_index = 0x27; pm_index > 0x23; pm_index--) {
outb(pm_index, PM_INDEX);
pm_data = inb(PM_DATA);
base_addr <<= 8;
base_addr |= (u32)pm_data;
}
base_addr &= 0xFFFFF000;
return (base_addr);
}
void configure_gpio(uintptr_t base_addr, u32 gpio, u8 iomux_ftn, u8 setting)
{
u8 bdata;
u8 *memptr;
memptr = (u8 *)(base_addr + IOMUX_OFFSET + gpio);
*memptr = iomux_ftn;
memptr = (u8 *)(base_addr + GPIO_OFFSET + gpio);
bdata = *memptr;
bdata &= 0x07;
bdata |= setting; /* set direction and data value */
*memptr = bdata;
}
u8 read_gpio(uintptr_t base_addr, u32 gpio)
{
u8 *memptr = (u8 *)(base_addr + GPIO_OFFSET + gpio);
return (*memptr & GPIO_DATA_IN) ? 1 : 0;
}
int get_spd_offset(void)
{
uintptr_t base_addr = find_gpio_base();
u8 spd_offset = read_gpio(base_addr, GPIO_16);
return spd_offset;
}
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