u-boot/common/spl/spl_fat.c

/*
 * (C) Copyright 2014
 * Texas Instruments, <www.ti.com>
 *
 * Dan Murphy <dmurphy@ti.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 *
 * FAT Image Functions copied from spl_mmc.c
 */

#include <common.h>
#include <spl.h>
#include <asm/u-boot.h>
#include <fat.h>
#include <image.h>

static int fat_registered;

#ifdef CONFIG_SPL_FAT_SUPPORT
static int spl_register_fat_device(block_dev_desc_t *block_dev, int partition)
{
	int err = 0;

	if (fat_registered)
		return err;

	err = fat_register_device(block_dev, partition);
	if (err) {
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
		printf("%s: fat register err - %d\n", __func__, err);
#endif
		hang();
	}

	fat_registered = 1;

	return err;
}

int spl_load_image_fat(block_dev_desc_t *block_dev,
						int partition,
						const char *filename)
{
	int err;
	struct image_header *header;

	err = spl_register_fat_device(block_dev, partition);
	if (err)
		goto end;

	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
						sizeof(struct image_header));

	err = file_fat_read(filename, header, sizeof(struct image_header));
	if (err <= 0)
		goto end;

	spl_parse_image_header(header);

	err = file_fat_read(filename, (u8 *)spl_image.load_addr, 0);

end:
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
	if (err <= 0)
		printf("%s: error reading image %s, err - %d\n",
		       __func__, filename, err);
#endif

	return (err <= 0);
}

#ifdef CONFIG_SPL_OS_BOOT
int spl_load_image_fat_os(block_dev_desc_t *block_dev, int partition)
{
	int err;

	err = spl_register_fat_device(block_dev, partition);
	if (err)
		return err;

	err = file_fat_read(CONFIG_SPL_FAT_LOAD_ARGS_NAME,
			    (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
	if (err <= 0) {
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
		printf("%s: error reading image %s, err - %d\n",
		       __func__, CONFIG_SPL_FAT_LOAD_ARGS_NAME, err);
#endif
		return -1;
	}

	return spl_load_image_fat(block_dev, partition,
			CONFIG_SPL_FAT_LOAD_KERNEL_NAME);
}
#endif
#endif