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 #if defined(CONFIG_SPL_NAND_RAW_ONLY)
  14 int 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         return 0;
  25 }
  26 #else
  27 static int spl_nand_load_element(int offset, struct image_header *header)
  28 {
  29         int err;
  30
  31         err = nand_spl_load_image(offset, sizeof(*header), (void *)header);
  32         if (err)
  33                 return err;
  34
  35         spl_parse_image_header(header);
  36         return nand_spl_load_image(offset, spl_image.size,
  37                                    (void *)(unsigned long)spl_image.load_addr);
  38 }
  39
  40 int spl_nand_load_image(void)
  41 {
  42         int err;
  43         struct image_header *header;
  44         int *src __attribute__((unused));
  45         int *dst __attribute__((unused));
  46
  47         debug("spl: nand - using hw ecc\n");
  48         nand_init();
  49
  50         /*use CONFIG_SYS_TEXT_BASE as temporary storage area */
  51         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
  52 #ifdef CONFIG_SPL_OS_BOOT
  53         if (!spl_start_uboot()) {
  54                 /*
  55                  * load parameter image
  56                  * load to temp position since nand_spl_load_image reads
  57                  * a whole block which is typically larger than
  58                  * CONFIG_CMD_SPL_WRITE_SIZE therefore may overwrite
  59                  * following sections like BSS
  60                  */
  61                 nand_spl_load_image(CONFIG_CMD_SPL_NAND_OFS,
  62                         CONFIG_CMD_SPL_WRITE_SIZE,
  63                         (void *)CONFIG_SYS_TEXT_BASE);
  64                 /* copy to destintion */
  65                 for (dst = (int *)CONFIG_SYS_SPL_ARGS_ADDR,
  66                                 src = (int *)CONFIG_SYS_TEXT_BASE;
  67                                 src < (int *)(CONFIG_SYS_TEXT_BASE +
  68                                 CONFIG_CMD_SPL_WRITE_SIZE);
  69                                 src++, dst++) {
  70                         writel(readl(src), dst);
  71                 }
  72
  73                 /* load linux */
  74                 nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  75                         sizeof(*header), (void *)header);
  76                 spl_parse_image_header(header);
  77                 if (header->ih_os == IH_OS_LINUX) {
  78                         /* happy - was a linux */
  79                         err = nand_spl_load_image(
  80                                 CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  81                                 spl_image.size,
  82                                 (void *)spl_image.load_addr);
  83                         nand_deselect();
  84                         return err;
  85                 } else {
  86                         puts("The Expected Linux image was not "
  87                                 "found. Please check your NAND "
  88                                 "configuration.\n");
  89                         puts("Trying to start u-boot now...\n");
  90                 }
  91         }
  92 #endif
  93 #ifdef CONFIG_NAND_ENV_DST
  94         spl_nand_load_element(CONFIG_ENV_OFFSET, header);
  95 #ifdef CONFIG_ENV_OFFSET_REDUND
  96         spl_nand_load_element(CONFIG_ENV_OFFSET_REDUND, header);
  97 #endif
  98 #endif
  99         /* Load u-boot */
 100         err = spl_nand_load_element(CONFIG_SYS_NAND_U_BOOT_OFFS, header);
 101         nand_deselect();
 102         return err;
 103 }
 104 #endif