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         __maybe_unused char *file;
  78
  79         err = spl_register_fat_device(block_dev, partition);
  80         if (err)
  81                 return err;
  82
  83 #if defined(CONFIG_SPL_ENV_SUPPORT) && defined(CONFIG_SPL_OS_BOOT)
  84         file = getenv("falcon_args_file");
  85         if (file) {
  86                 err = file_fat_read(file, (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
  87                 if (err <= 0) {
  88                         printf("spl: error reading image %s, err - %d, falling back to default\n",
  89                                file, err);
  90                         goto defaults;
  91                 }
  92                 file = getenv("falcon_image_file");
  93                 if (file) {
  94                         err = spl_load_image_fat(block_dev, partition, file);
  95                         if (err != 0) {
  96                                 puts("spl: falling back to default\n");
  97                                 goto defaults;
  98                         }
  99
 100                         return 0;
 101                 } else
 102                         puts("spl: falcon_image_file not set in environment, falling back to default\n");
 103         } else
 104                 puts("spl: falcon_args_file not set in environment, falling back to default\n");
 105
 106 defaults:
 107 #endif
 108
 109         err = file_fat_read(CONFIG_SPL_FAT_LOAD_ARGS_NAME,
 110                             (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
 111         if (err <= 0) {
 112 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 113                 printf("%s: error reading image %s, err - %d\n",
 114                        __func__, CONFIG_SPL_FAT_LOAD_ARGS_NAME, err);
 115 #endif
 116                 return -1;
 117         }
 118
 119         return spl_load_image_fat(block_dev, partition,
 120                         CONFIG_SPL_FAT_LOAD_KERNEL_NAME);
 121 }
 122 #endif
 123 #endif