common/spl/spl_fat.c

   1 /*
   2  * (C) Copyright 2014
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * Dan Murphy <dmurphy@ti.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  *
   9  * FAT Image Functions copied from spl_mmc.c
  10  */
  11
  12 #include <common.h>
  13 #include <spl.h>
  14 #include <asm/u-boot.h>
  15 #include <fat.h>
  16 #include <image.h>
  17
  18 static int fat_registered;
  19
  20 #ifdef CONFIG_SPL_FAT_SUPPORT
  21 static int spl_register_fat_device(block_dev_desc_t *block_dev, int partition)
  22 {
  23         int err = 0;
  24
  25         if (fat_registered)
  26                 return err;
  27
  28         err = fat_register_device(block_dev, partition);
  29         if (err) {
  30 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
  31                 printf("%s: fat register err - %d\n", __func__, err);
  32 #endif
  33                 hang();
  34         }
  35
  36         fat_registered = 1;
  37
  38         return err;
  39 }
  40
  41 int spl_load_image_fat(block_dev_desc_t *block_dev,
  42                                                 int partition,
  43                                                 const char *filename)
  44 {
  45         int err;
  46         struct image_header *header;
  47
  48         err = spl_register_fat_device(block_dev, partition);
  49         if (err)
  50                 goto end;
  51
  52         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
  53                                                 sizeof(struct image_header));
  54
  55         err = file_fat_read(filename, header, sizeof(struct image_header));
  56         if (err <= 0)
  57                 goto end;
  58
  59         spl_parse_image_header(header);
  60
  61         err = file_fat_read(filename, (u8 *)spl_image.load_addr, 0);
  62
  63 end:
  64 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
  65         if (err <= 0)
  66                 printf("%s: error reading image %s, err - %d\n",
  67                        __func__, filename, err);
  68 #endif
  69
  70         return (err <= 0);
  71 }
  72
  73 #ifdef CONFIG_SPL_OS_BOOT
  74 int spl_load_image_fat_os(block_dev_desc_t *block_dev, int partition)
  75 {
  76         int err;
  77
  78         err = spl_register_fat_device(block_dev, partition);
  79         if (err)
  80                 return err;
  81
  82         err = file_fat_read(CONFIG_SPL_FAT_LOAD_ARGS_NAME,
  83                             (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
  84         if (err <= 0) {
  85 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
  86                 printf("%s: error reading image %s, err - %d\n",
  87                        __func__, CONFIG_SPL_FAT_LOAD_ARGS_NAME, err);
  88 #endif
  89                 return -1;
  90         }
  91
  92         return spl_load_image_fat(block_dev, partition,
  93                         CONFIG_SPL_FAT_LOAD_KERNEL_NAME);
  94 }
  95 #endif
  96 #endif