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/*
* Copyright (C) 2011 OMICRON electronics GmbH
*
* based on drivers/mtd/nand/nand_spl_load.c
*
* Copyright (C) 2011
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <spi.h>
#include <spi_flash.h>
#include <errno.h>
#include <spl.h>
#ifdef CONFIG_SPL_OS_BOOT
/*
* Load the kernel, check for a valid header we can parse, and if found load
* the kernel and then device tree.
*/
static int spi_load_image_os(struct spi_flash *flash,
struct image_header *header)
{
int err;
/* Read for a header, parse or error out. */
spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, 0x40,
(void *)header);
if (image_get_magic(header) != IH_MAGIC)
return -1;
err = spl_parse_image_header(header);
if (err)
return err;
spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS,
spl_image.size, (void *)spl_image.load_addr);
/* Read device tree. */
spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS,
CONFIG_SYS_SPI_ARGS_SIZE,
(void *)CONFIG_SYS_SPL_ARGS_ADDR);
return 0;
}
#endif
/*
* The main entry for SPI booting. It's necessary that SDRAM is already
* configured and available since this code loads the main U-Boot image
* from SPI into SDRAM and starts it from there.
*/
int spl_spi_load_image(void)
{
int err = 0;
struct spi_flash *flash;
struct image_header *header;
/*
* Load U-Boot image from SPI flash into RAM
*/
flash = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
CONFIG_SF_DEFAULT_CS,
CONFIG_SF_DEFAULT_SPEED,
CONFIG_SF_DEFAULT_MODE);
if (!flash) {
puts("SPI probe failed.\n");
return -ENODEV;
}
/* use CONFIG_SYS_TEXT_BASE as temporary storage area */
header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
#ifdef CONFIG_SPL_OS_BOOT
if (spl_start_uboot() || spi_load_image_os(flash, header))
#endif
{
/* Load u-boot, mkimage header is 64 bytes. */
err = spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS, 0x40,
(void *)header);
if (err)
return err;
err = spl_parse_image_header(header);
if (err)
return err;
err = spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS,
spl_image.size, (void *)spl_image.load_addr);
}
return err;
}
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