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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Google Inc.
* Copyright (C) 2015 Intel Corp.
*
* 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 <bootblock_common.h>
#include <device/mmio.h>
#include <device/pci_ops.h>
#include <soc/gpio.h>
#include <soc/lpc.h>
#include <soc/pci_devs.h>
/*
* return family number and internal pad number in that community
* by pad number and which community it is in.
*/
/* family number in high byte and inner pad number in lowest byte */
void bootblock_mainboard_early_init(void)
{
uint32_t reg;
uint32_t *pad_config_reg;
/* Enable the UART hardware for COM1. */
reg = 1;
pci_write_config32(PCI_DEV(0, LPC_DEV, 0), UART_CONT, reg);
/*
* Set up the pads to select the UART function
* AD12 SW16(UART1_DATAIN/UART0_DATAIN) - Setting Mode 2 for UART0_RXD
* AD10 SW20(UART1_DATAOUT/UART0_DATAOUT) - Setting Mode 2 for UART0_TXD
*/
pad_config_reg = gpio_pad_config_reg(GP_SOUTHWEST, UART1_RXD_PAD);
write32(pad_config_reg, SET_PAD_MODE_SELECTION(PAD_CONFIG0_DEFAULT0,
M2));
pad_config_reg = gpio_pad_config_reg(GP_SOUTHWEST, UART1_TXD_PAD);
write32(pad_config_reg, SET_PAD_MODE_SELECTION(PAD_CONFIG0_DEFAULT0,
M2));
}
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