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/*
* 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 <gpio.h>
#include <soc/spi.h>
#include <console/console.h>
void bootblock_mainboard_early_init(void)
{
/* Let gpio2ab io domains works at 1.8V.
*
* If io_vsel[0] == 0(default value), gpio2ab io domains is 3.0V
* powerd by APIO2_VDD, otherwise, 1.8V supplied by APIO2_VDDPST.
* But from the schematic of kevin rev0, the APIO2_VDD and
* APIO2_VDDPST both are 1.8V(intentionally?).
*
* So, by default, CPU1_SDIO_PWREN(GPIO2_A2) can't output 3.0V
* because the supply is 1.8V.
* Let ask GPIO2_A2 output 1.8V to make GPIO interal logic happy.
*/
write32(&rk3399_grf->io_vsel, RK_SETBITS(1 << 0));
/*
* Let's enable these power rails here, we are already running the SPI
* Flash based code.
*/
gpio_output(GPIO(0, B, 2), 1); /* PP1500_EN */
gpio_output(GPIO(0, B, 4), 1); /* PP3000_EN */
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);
}
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