| /* |
| * 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 "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; |
| } |