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