u-boot/common/spl/spl_fat.c
Lokesh Vutla 97ca364faf spl: Support loading a FIT from FAT FS
Detect a FIT when loading from a FAT File system and handle it using the
new FIT SPL support.

Tested-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
2016-05-27 15:41:40 -04:00

159 lines
3.4 KiB
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 <errno.h>
#include <image.h>
#include <libfdt.h>
static int fat_registered;
#ifdef CONFIG_SPL_FAT_SUPPORT
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 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 = (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;
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(&load, 0, header);
} else {
err = spl_parse_image_header(header);
if (err)
goto end;
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(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 = getenv("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 = getenv("falcon_image_file");
if (file) {
err = spl_load_image_fat(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(block_dev, partition,
CONFIG_SPL_FS_LOAD_KERNEL_NAME);
}
#else
int spl_load_image_fat_os(struct blk_desc *block_dev, int partition)
{
return -ENOSYS;
}
#endif
#endif