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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017-2018 Advanced Micro Devices, Inc.
*
* 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 <soc/southbridge.h>
#include <amdblocks/lpc.h>
#include <device/pci_ops.h>
#include <soc/pci_devs.h>
#include <drivers/uart/uart8250reg.h>
#include <arch/io.h>
#include "../gpio.h"
/* Enable IO access to port, then enable UART HW control pins */
static void enable_serial(unsigned int base_port, unsigned int io_enable)
{
u32 temp;
u8 reg;
temp = pci_read_config32(SOC_LPC_DEV, LPC_IO_PORT_DECODE_ENABLE);
temp |= io_enable;
pci_write_config32(SOC_LPC_DEV, LPC_IO_PORT_DECODE_ENABLE, temp);
/*
* Remove this section if HW handshake is not needed. This is needed
* only for those who don't have a modified serial cable (connecting
* DCD to DTR and DSR, plus connecting RTS to CTS). When you buy cables
* on any store, they don't have these modification.
*/
reg = inb(base_port + UART8250_MCR);
reg |= UART8250_MCR_DTR | UART8250_MCR_RTS;
outb(reg, base_port + UART8250_MCR);
}
void bootblock_mainboard_early_init(void)
{
sb_clk_output_48Mhz(2);
/*
* UARTs enabled by default at reset, just need RTS, CTS
* and access to the IO address.
*/
enable_serial(0x03f8, DECODE_ENABLE_SERIAL_PORT0);
enable_serial(0x02f8, DECODE_ENABLE_SERIAL_PORT1);
}
void bootblock_mainboard_init(void)
{
size_t num_gpios;
const struct soc_amd_gpio *gpios;
gpios = early_gpio_table(&num_gpios);
program_gpios(gpios, num_gpios);
}
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