git.sur5r.net Git - u-boot/blob - common/spl/spl_fat.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2014
   4  * Texas Instruments, <www.ti.com>
   5  *
   6  * Dan Murphy <dmurphy@ti.com>
   7  *
   8  * FAT Image Functions copied from spl_mmc.c
   9  */
  10
  11 #include <common.h>
  12 #include <spl.h>
  13 #include <asm/u-boot.h>
  14 #include <fat.h>
  15 #include <errno.h>
  16 #include <image.h>
  17 #include <linux/libfdt.h>
  18
  19 static int fat_registered;
  20
  21 static int spl_register_fat_device(struct blk_desc *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                 return err;
  34         }
  35
  36         fat_registered = 1;
  37
  38         return err;
  39 }
  40
  41 static ulong spl_fit_read(struct spl_load_info *load, ulong file_offset,
  42                           ulong size, void *buf)
  43 {
  44         loff_t actread;
  45         int ret;
  46         char *filename = (char *)load->filename;
  47
  48         ret = fat_read_file(filename, buf, file_offset, size, &actread);
  49         if (ret)
  50                 return ret;
  51
  52         return actread;
  53 }
  54
  55 int spl_load_image_fat(struct spl_image_info *spl_image,
  56                        struct blk_desc *block_dev, int partition,
  57                        const char *filename)
  58 {
  59         int err;
  60         struct image_header *header;
  61
  62         err = spl_register_fat_device(block_dev, partition);
  63         if (err)
  64                 goto end;
  65
  66         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
  67                                                 sizeof(struct image_header));
  68
  69         err = file_fat_read(filename, header, sizeof(struct image_header));
  70         if (err <= 0)
  71                 goto end;
  72
  73         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
  74             image_get_magic(header) == FDT_MAGIC) {
  75                 struct spl_load_info load;
  76
  77                 debug("Found FIT\n");
  78                 load.read = spl_fit_read;
  79                 load.bl_len = 1;
  80                 load.filename = (void *)filename;
  81                 load.priv = NULL;
  82
  83                 return spl_load_simple_fit(spl_image, &load, 0, header);
  84         } else {
  85                 err = spl_parse_image_header(spl_image, header);
  86                 if (err)
  87                         goto end;
  88
  89                 err = file_fat_read(filename,
  90                                     (u8 *)(uintptr_t)spl_image->load_addr, 0);
  91         }
  92
  93 end:
  94 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
  95         if (err <= 0)
  96                 printf("%s: error reading image %s, err - %d\n",
  97                        __func__, filename, err);
  98 #endif
  99
 100         return (err <= 0);
 101 }
 102
 103 #ifdef CONFIG_SPL_OS_BOOT
 104 int spl_load_image_fat_os(struct spl_image_info *spl_image,
 105                           struct blk_desc *block_dev, int partition)
 106 {
 107         int err;
 108         __maybe_unused char *file;
 109
 110         err = spl_register_fat_device(block_dev, partition);
 111         if (err)
 112                 return err;
 113
 114 #if defined(CONFIG_SPL_ENV_SUPPORT) && defined(CONFIG_SPL_OS_BOOT)
 115         file = env_get("falcon_args_file");
 116         if (file) {
 117                 err = file_fat_read(file, (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
 118                 if (err <= 0) {
 119                         printf("spl: error reading image %s, err - %d, falling back to default\n",
 120                                file, err);
 121                         goto defaults;
 122                 }
 123                 file = env_get("falcon_image_file");
 124                 if (file) {
 125                         err = spl_load_image_fat(spl_image, block_dev,
 126                                                  partition, file);
 127                         if (err != 0) {
 128                                 puts("spl: falling back to default\n");
 129                                 goto defaults;
 130                         }
 131
 132                         return 0;
 133                 } else
 134                         puts("spl: falcon_image_file not set in environment, falling back to default\n");
 135         } else
 136                 puts("spl: falcon_args_file not set in environment, falling back to default\n");
 137
 138 defaults:
 139 #endif
 140
 141         err = file_fat_read(CONFIG_SPL_FS_LOAD_ARGS_NAME,
 142                             (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
 143         if (err <= 0) {
 144 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 145                 printf("%s: error reading image %s, err - %d\n",
 146                        __func__, CONFIG_SPL_FS_LOAD_ARGS_NAME, err);
 147 #endif
 148                 return -1;
 149         }
 150
 151         return spl_load_image_fat(spl_image, block_dev, partition,
 152                         CONFIG_SPL_FS_LOAD_KERNEL_NAME);
 153 }
 154 #else
 155 int spl_load_image_fat_os(struct spl_image_info *spl_image,
 156                           struct blk_desc *block_dev, int partition)
 157 {
 158         return -ENOSYS;
 159 }
 160 #endif