coreboot-kgpe-d16/src/mainboard/google/gru/bootblock.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright 2016 Rockchip 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 <arch/io.h>
#include <bootblock_common.h>
#include <soc/grf.h>
#include <soc/spi.h>
#include <console/console.h>

void bootblock_mainboard_early_init(void)
{
	if (IS_ENABLED(CONFIG_DRIVERS_UART)) {
		_Static_assert(CONFIG_CONSOLE_SERIAL_UART_ADDRESS == UART2_BASE,
			       "CONSOLE_SERIAL_UART should be UART2");

		/* iomux: select gpio4c[4:3] as uart2 dbg port */
		write32(&rk3399_grf->iomux_uart2c, IOMUX_UART2C);

		/* grf soc_con7[11:10] use for uart2 select */
		write32(&rk3399_grf->soc_con7, UART2C_SEL);
	}
}

void bootblock_mainboard_init(void)
{
	/* select the pinmux for spi flashrom */
	write32(&rk3399_pmugrf->spi1_rxd, IOMUX_SPI1_RX);
	write32(&rk3399_pmugrf->spi1_csclktx, IOMUX_SPI1_CSCLKTX);

	rockchip_spi_init(CONFIG_BOOT_MEDIA_SPI_BUS, 24750*KHz);
}