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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Rockchip Inc.
* Copyright 2014 Google 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <arch/io.h>
#include <assert.h>
#include <bootblock_common.h>
#include <console/console.h>
#include <delay.h>
#include <reset.h>
#include <soc/clock.h>
#include <soc/i2c.h>
#include <soc/grf.h>
#include <soc/pmu.h>
#include <soc/rk808.h>
#include <soc/spi.h>
#include <vendorcode/google/chromeos/chromeos.h>
#include "board.h"
void bootblock_mainboard_early_init()
{
if (IS_ENABLED(CONFIG_DRIVERS_UART)) {
assert(CONFIG_CONSOLE_SERIAL_UART_ADDRESS == UART2_BASE);
write32(&rk3288_grf->iomux_uart2, IOMUX_UART2);
}
}
void bootblock_mainboard_init(void)
{
if (rkclk_was_watchdog_reset())
reboot_from_watchdog();
/* Up VDD_CPU (BUCK1) to 1.4V to support max CPU frequency (1.8GHz). */
setbits_le32(&rk3288_pmu->iomux_i2c0scl, IOMUX_I2C0SCL);
setbits_le32(&rk3288_pmu->iomux_i2c0sda, IOMUX_I2C0SDA);
assert(CONFIG_PMIC_BUS == 0); /* must correspond with IOMUX */
i2c_init(CONFIG_PMIC_BUS, 400*KHz);
/* Slowly raise to max CPU voltage to prevent overshoot */
rk808_configure_buck(1, 1200);
udelay(175);/* Must wait for voltage to stabilize,2mV/us */
rk808_configure_buck(1, 1400);
udelay(100);/* Must wait for voltage to stabilize,2mV/us */
rkclk_configure_cpu();
/* i2c1 for tpm */
write32(&rk3288_grf->iomux_i2c1, IOMUX_I2C1);
i2c_init(1, 400*KHz);
/* spi2 for firmware ROM */
write32(&rk3288_grf->iomux_spi2csclk, IOMUX_SPI2_CSCLK);
write32(&rk3288_grf->iomux_spi2txrx, IOMUX_SPI2_TXRX);
rockchip_spi_init(CONFIG_BOOT_MEDIA_SPI_BUS, 24750*KHz);
/* spi0 for chrome ec */
write32(&rk3288_grf->iomux_spi0, IOMUX_SPI0);
rockchip_spi_init(CONFIG_EC_GOOGLE_CHROMEEC_SPI_BUS, 8250*KHz);
setup_chromeos_gpios();
}
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