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/*
* Copyright (C) 2014-2016 Stefan Roese <sr@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <debug_uart.h>
#include <fdtdec.h>
#include <spl.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
DECLARE_GLOBAL_DATA_PTR;
static u32 get_boot_device(void)
{
u32 val;
u32 boot_device;
/*
* First check, if UART boot-mode is active. This can only
* be done, via the bootrom error register. Here the
* MSB marks if the UART mode is active.
*/
val = readl(CONFIG_BOOTROM_ERR_REG);
boot_device = (val & BOOTROM_ERR_MODE_MASK) >> BOOTROM_ERR_MODE_OFFS;
debug("BOOTROM_REG=0x%08x boot_device=0x%x\n", val, boot_device);
if (boot_device == BOOTROM_ERR_MODE_UART)
return BOOT_DEVICE_UART;
/*
* Now check the SAR register for the strapped boot-device
*/
val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */
boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS;
debug("SAR_REG=0x%08x boot_device=0x%x\n", val, boot_device);
switch (boot_device) {
#ifdef CONFIG_SPL_MMC_SUPPORT
case BOOT_FROM_MMC:
case BOOT_FROM_MMC_ALT:
return BOOT_DEVICE_MMC1;
#endif
case BOOT_FROM_UART:
return BOOT_DEVICE_UART;
case BOOT_FROM_SPI:
default:
return BOOT_DEVICE_SPI;
};
}
u32 spl_boot_device(void)
{
return get_boot_device();
}
#ifdef CONFIG_SPL_MMC_SUPPORT
u32 spl_boot_mode(void)
{
return MMCSD_MODE_RAW;
}
#endif
void board_init_f(ulong dummy)
{
int ret;
/*
* Pin muxing needs to be done before UART output, since
* on A38x the UART pins need some re-muxing for output
* to work.
*/
board_early_init_f();
/* Example code showing how to enable the debug UART on MVEBU */
#ifdef EARLY_UART
/*
* Debug UART can be used from here if required:
*
* debug_uart_init();
* printch('a');
* printhex8(0x1234);
* printascii("string");
*/
#endif
ret = spl_init();
if (ret) {
debug("spl_init() failed: %d\n", ret);
hang();
}
/* Use special translation offset for SPL */
dm_set_translation_offset(0xd0000000 - 0xf1000000);
preloader_console_init();
timer_init();
/* First init the serdes PHY's */
serdes_phy_config();
/* Setup DDR */
ddr3_init();
/*
* Return to the BootROM to continue the Marvell xmodem
* UART boot protocol. As initiated by the kwboot tool.
*
* This can only be done by the BootROM and not by the
* U-Boot SPL infrastructure, since the beginning of the
* image is already read and interpreted by the BootROM.
* SPL has no chance to receive this information. So we
* need to return to the BootROM to enable this xmodem
* UART download.
*/
if (get_boot_device() == BOOT_DEVICE_UART)
return_to_bootrom();
}
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