spl_fat.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2014
* Texas Instruments, <www.ti.com>
*
* Dan Murphy <dmurphy@ti.com>
*
* FAT Image Functions copied from spl_mmc.c
*/
#include <common.h>
#include <spl.h>
#include <asm/u-boot.h>
#include <fat.h>
#include <errno.h>
#include <image.h>
#include <linux/libfdt.h>
static int fat_registered;
static int spl_register_fat_device(struct blk_desc *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
return err;
}
fat_registered = 1;
return err;
}
static ulong spl_fit_read(struct spl_load_info *load, ulong file_offset,
ulong size, void *buf)
{
loff_t actread;
int ret;
char *filename = (char *)load->filename;
ret = fat_read_file(filename, buf, file_offset, size, &actread);
if (ret)
return ret;
return actread;
}
int spl_load_image_fat(struct spl_image_info *spl_image,
struct blk_desc *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 = spl_get_load_buffer(-sizeof(*header), sizeof(*header));
err = file_fat_read(filename, header, sizeof(struct image_header));
if (err <= 0)
goto end;
if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_FULL) &&
image_get_magic(header) == FDT_MAGIC) {
err = file_fat_read(filename, (void *)CONFIG_SYS_LOAD_ADDR, 0);
if (err <= 0)
goto end;
err = spl_parse_image_header(spl_image,
(struct image_header *)CONFIG_SYS_LOAD_ADDR);
if (err == -EAGAIN)
return err;
if (err == 0)
err = 1;
} else if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
image_get_magic(header) == FDT_MAGIC) {
struct spl_load_info load;
debug("Found FIT\n");
load.read = spl_fit_read;
load.bl_len = 1;
load.filename = (void *)filename;
load.priv = NULL;
return spl_load_simple_fit(spl_image, &load, 0, header);
} else {
err = spl_parse_image_header(spl_image, header);
if (err)
goto end;
err = file_fat_read(filename,
(u8 *)(uintptr_t)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(struct spl_image_info *spl_image,
struct blk_desc *block_dev, int partition)
{
int err;
__maybe_unused char *file;
err = spl_register_fat_device(block_dev, partition);
if (err)
return err;
#if defined(CONFIG_SPL_ENV_SUPPORT) && defined(CONFIG_SPL_OS_BOOT)
file = env_get("falcon_args_file");
if (file) {
err = file_fat_read(file, (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
if (err <= 0) {
printf("spl: error reading image %s, err - %d, falling back to default\n",
file, err);
goto defaults;
}
file = env_get("falcon_image_file");
if (file) {
err = spl_load_image_fat(spl_image, block_dev,
partition, file);
if (err != 0) {
puts("spl: falling back to default\n");
goto defaults;
}
return 0;
} else
puts("spl: falcon_image_file not set in environment, falling back to default\n");
} else
puts("spl: falcon_args_file not set in environment, falling back to default\n");
defaults:
#endif
err = file_fat_read(CONFIG_SPL_FS_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_FS_LOAD_ARGS_NAME, err);
#endif
return -1;
}
return spl_load_image_fat(spl_image, block_dev, partition,
CONFIG_SPL_FS_LOAD_KERNEL_NAME);
}
#else
int spl_load_image_fat_os(struct spl_image_info *spl_image,
struct blk_desc *block_dev, int partition)
{
return -ENOSYS;
}
#endif