common/spl/spl_nand.c

   1 /*
   2  * Copyright (C) 2011
   3  * Corscience GmbH & Co. KG - Simon Schwarz <[email protected]>
   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 #if defined(CONFIG_SPL_NAND_RAW_ONLY)
  14 void spl_nand_load_image(void)
  15 {
  16         nand_init();
  17
  18         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  19                             CONFIG_SYS_NAND_U_BOOT_SIZE,
  20                             (void *)CONFIG_SYS_NAND_U_BOOT_DST);
  21         spl_set_header_raw_uboot();
  22         nand_deselect();
  23 }
  24 #else
  25 void spl_nand_load_image(void)
  26 {
  27         struct image_header *header;
  28         int *src __attribute__((unused));
  29         int *dst __attribute__((unused));
  30
  31         debug("spl: nand - using hw ecc\n");
  32         nand_init();
  33
  34         /*use CONFIG_SYS_TEXT_BASE as temporary storage area */
  35         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
  36 #ifdef CONFIG_SPL_OS_BOOT
  37         if (!spl_start_uboot()) {
  38                 /*
  39                  * load parameter image
  40                  * load to temp position since nand_spl_load_image reads
  41                  * a whole block which is typically larger than
  42                  * CONFIG_CMD_SPL_WRITE_SIZE therefore may overwrite
  43                  * following sections like BSS
  44                  */
  45                 nand_spl_load_image(CONFIG_CMD_SPL_NAND_OFS,
  46                         CONFIG_CMD_SPL_WRITE_SIZE,
  47                         (void *)CONFIG_SYS_TEXT_BASE);
  48                 /* copy to destintion */
  49                 for (dst = (int *)CONFIG_SYS_SPL_ARGS_ADDR,
  50                                 src = (int *)CONFIG_SYS_TEXT_BASE;
  51                                 src < (int *)(CONFIG_SYS_TEXT_BASE +
  52                                 CONFIG_CMD_SPL_WRITE_SIZE);
  53                                 src++, dst++) {
  54                         writel(readl(src), dst);
  55                 }
  56
  57                 /* load linux */
  58                 nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  59                         sizeof(*header), (void *)header);
  60                 spl_parse_image_header(header);
  61                 if (header->ih_os == IH_OS_LINUX) {
  62                         /* happy - was a linux */
  63                         nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  64                                 spl_image.size, (void *)spl_image.load_addr);
  65                         nand_deselect();
  66                         return;
  67                 } else {
  68                         puts("The Expected Linux image was not "
  69                                 "found. Please check your NAND "
  70                                 "configuration.\n");
  71                         puts("Trying to start u-boot now...\n");
  72                 }
  73         }
  74 #endif
  75 #ifdef CONFIG_NAND_ENV_DST
  76         nand_spl_load_image(CONFIG_ENV_OFFSET,
  77                 sizeof(*header), (void *)header);
  78         spl_parse_image_header(header);
  79         nand_spl_load_image(CONFIG_ENV_OFFSET, spl_image.size,
  80                 (void *)spl_image.load_addr);
  81 #ifdef CONFIG_ENV_OFFSET_REDUND
  82         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
  83                 sizeof(*header), (void *)header);
  84         spl_parse_image_header(header);
  85         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, spl_image.size,
  86                 (void *)spl_image.load_addr);
  87 #endif
  88 #endif
  89         /* Load u-boot */
  90         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  91                 sizeof(*header), (void *)header);
  92         spl_parse_image_header(header);
  93         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  94                 spl_image.size, (void *)(unsigned long)spl_image.load_addr);
  95         nand_deselect();
  96 }
  97 #endif