mainboard.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/mmio.h>
#include <boot/coreboot_tables.h>
#include <console/console.h>
#include <device/device.h>
#include <device/i2c_simple.h>
#include <edid.h>
#include <gpio.h>
#include <soc/display.h>
#include <soc/grf.h>
#include <soc/soc.h>
#include <soc/pmu.h>
#include <soc/clock.h>
#include <soc/rk808.h>
#include <soc/spi.h>
#include <soc/i2c.h>
#include <symbols.h>
#include <security/vboot/vboot_common.h>
 
#include "board.h"
 
static void configure_usb(void)
{
        gpio_output(GPIO(0, B, 4), 1);                  /* USB2_PWR_EN */
}
 
static void configure_emmc(void)
{
        write32(&rk3288_grf->iomux_emmcdata, IOMUX_EMMCDATA);
        write32(&rk3288_grf->iomux_emmcpwren, IOMUX_EMMCPWREN);
        write32(&rk3288_grf->iomux_emmccmd, IOMUX_EMMCCMD);
 
        gpio_output(GPIO(2, B, 1), 1);          /* EMMC_RST_L */
}
 
static void configure_codec(void)
{
        write32(&rk3288_grf->iomux_i2c2, IOMUX_I2C2);   /* CODEC I2C */
        i2c_init(2, 400*KHz);                           /* CODEC I2C */
 
        write32(&rk3288_grf->iomux_i2s, IOMUX_I2S);
        write32(&rk3288_grf->iomux_i2sclk, IOMUX_I2SCLK);
 
        rk808_configure_ldo(6, 1800);   /* VCC18_CODEC */
 
        /* AUDIO IO domain 1.8V voltage selection */
        write32(&rk3288_grf->io_vsel, RK_SETBITS(1 << 6));
        rkclk_configure_i2s(12288000);
}
 
static void configure_3g(void)
{
        /* Force 3G modem off to avoid confusing the EHCI host and
         * causing problems during enumeration/init */
        gpio_output(GPIO(5, C, 1), 1);  /* 3G_SHUTDOWN */
        gpio_output(GPIO(4, D, 2), 0);  /* 3G_ON_OFF */
}
 
static void mainboard_init(struct device *dev)
{
        gpio_output(GPIO_RESET, 0);
 
        configure_usb();
        configure_emmc();
        configure_codec();
        configure_3g();
        /* No video. */
 
        /* If recovery mode is detected, reduce frequency and voltage to reduce
         * heat in case machine is left unattended. chrome-os-partner:41201. */
        if (vboot_recovery_mode_enabled())  {
                printk(BIOS_DEBUG, "Reducing APLL freq for recovery mode.\n");
                rkclk_configure_cpu(APLL_600_MHZ);
                rk808_configure_buck(1, 900);
        }
}
 
static void mainboard_enable(struct device *dev)
{
        dev->ops->init = &mainboard_init;
}
 
struct chip_operations mainboard_ops = {
        .enable_dev = mainboard_enable,
};
 
void lb_board(struct lb_header *header)
{
        struct lb_range *dma;
 
        dma = (struct lb_range *)lb_new_record(header);
        dma->tag = LB_TAG_DMA;
        dma->size = sizeof(*dma);
        dma->range_start = (uintptr_t)_dma_coherent;
        dma->range_size = REGION_SIZE(dma_coherent);
}
 
void mainboard_power_on_backlight(void)
{
        return;
}