common/spl/spl_nand.c

   1 /*
   2  * Copyright (C) 2011
   3  * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7 #include <common.h>
   8 #include <config.h>
   9 #include <spl.h>
  10 #include <asm/io.h>
  11 #include <nand.h>
  12
  13 int spl_nand_load_image(void)
  14 {
  15         int ret;
  16         struct image_header *header;
  17         int *src __attribute__((unused));
  18         int *dst __attribute__((unused));
  19
  20         debug("spl: nand - using hw ecc\n");
  21         nand_init();
  22
  23         /*use CONFIG_SYS_TEXT_BASE as temporary storage area */
  24         header = (struct image_header *)CONFIG_SYS_TEXT_BASE;
  25 #ifdef CONFIG_SPL_OS_BOOT
  26         if (!spl_start_uboot()) {
  27                 /*
  28                  * load parameter image
  29                  * load to temp position since nand_spl_load_image reads
  30                  * a whole block which is typically larger than
  31                  * CONFIG_CMD_SPL_WRITE_SIZE therefore may overwrite
  32                  * following sections like BSS
  33                  */
  34                 nand_spl_load_image(CONFIG_CMD_SPL_NAND_OFS,
  35                         CONFIG_CMD_SPL_WRITE_SIZE,
  36                         (void *)CONFIG_SYS_TEXT_BASE);
  37                 /* copy to destintion */
  38                 for (dst = (int *)CONFIG_SYS_SPL_ARGS_ADDR,
  39                                 src = (int *)CONFIG_SYS_TEXT_BASE;
  40                                 src < (int *)(CONFIG_SYS_TEXT_BASE +
  41                                 CONFIG_CMD_SPL_WRITE_SIZE);
  42                                 src++, dst++) {
  43                         writel(readl(src), dst);
  44                 }
  45
  46                 /* load linux */
  47                 nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  48                         CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  49                 spl_parse_image_header(header);
  50                 if (header->ih_os == IH_OS_LINUX) {
  51                         /* happy - was a linux */
  52                         nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  53                                 spl_image.size, (void *)spl_image.load_addr);
  54                         nand_deselect();
  55                         return 0;
  56                 } else {
  57                         printf("The Expected Linux image was not"
  58                                 "found. Please check your NAND"
  59                                 "configuration.\n");
  60                         printf("Trying to start u-boot now...\n");
  61                 }
  62         }
  63 #endif
  64 #ifdef CONFIG_NAND_ENV_DST
  65         nand_spl_load_image(CONFIG_ENV_OFFSET,
  66                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  67         spl_parse_image_header(header);
  68         nand_spl_load_image(CONFIG_ENV_OFFSET, spl_image.size,
  69                 (void *)spl_image.load_addr);
  70 #ifdef CONFIG_ENV_OFFSET_REDUND
  71         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
  72                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  73         spl_parse_image_header(header);
  74         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, spl_image.size,
  75                 (void *)spl_image.load_addr);
  76 #endif
  77 #endif
  78         /* Load u-boot */
  79         ret = nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  80                                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  81         if (ret == 0) {
  82                 spl_parse_image_header(header);
  83                 ret = nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  84                                         spl_image.size, (void *)spl_image.load_addr);
  85         }
  86         nand_deselect();
  87         return ret;
  88 }