common/spl/spl_nand.c

   1 /*
   2  * Copyright (C) 2011
   3  * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23 #include <common.h>
  24 #include <config.h>
  25 #include <spl.h>
  26 #include <asm/io.h>
  27 #include <nand.h>
  28
  29 void spl_nand_load_image(void)
  30 {
  31         struct image_header *header;
  32         int *src __attribute__((unused));
  33         int *dst __attribute__((unused));
  34
  35         debug("spl: nand - using hw ecc\n");
  36         nand_init();
  37
  38         /*use CONFIG_SYS_TEXT_BASE as temporary storage area */
  39         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
  40 #ifdef CONFIG_SPL_OS_BOOT
  41         if (!spl_start_uboot()) {
  42                 /*
  43                  * load parameter image
  44                  * load to temp position since nand_spl_load_image reads
  45                  * a whole block which is typically larger than
  46                  * CONFIG_CMD_SPL_WRITE_SIZE therefore may overwrite
  47                  * following sections like BSS
  48                  */
  49                 nand_spl_load_image(CONFIG_CMD_SPL_NAND_OFS,
  50                         CONFIG_CMD_SPL_WRITE_SIZE,
  51                         (void *)CONFIG_SYS_TEXT_BASE);
  52                 /* copy to destintion */
  53                 for (dst = (int *)CONFIG_SYS_SPL_ARGS_ADDR,
  54                                 src = (int *)CONFIG_SYS_TEXT_BASE;
  55                                 src < (int *)(CONFIG_SYS_TEXT_BASE +
  56                                 CONFIG_CMD_SPL_WRITE_SIZE);
  57                                 src++, dst++) {
  58                         writel(readl(src), dst);
  59                 }
  60
  61                 /* load linux */
  62                 nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  63                         CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  64                 spl_parse_image_header(header);
  65                 if (header->ih_os == IH_OS_LINUX) {
  66                         /* happy - was a linux */
  67                         nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  68                                 spl_image.size, (void *)spl_image.load_addr);
  69                         nand_deselect();
  70                         return;
  71                 } else {
  72                         puts("The Expected Linux image was not "
  73                                 "found. Please check your NAND "
  74                                 "configuration.\n");
  75                         puts("Trying to start u-boot now...\n");
  76                 }
  77         }
  78 #endif
  79 #ifdef CONFIG_NAND_ENV_DST
  80         nand_spl_load_image(CONFIG_ENV_OFFSET,
  81                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  82         spl_parse_image_header(header);
  83         nand_spl_load_image(CONFIG_ENV_OFFSET, spl_image.size,
  84                 (void *)spl_image.load_addr);
  85 #ifdef CONFIG_ENV_OFFSET_REDUND
  86         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
  87                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  88         spl_parse_image_header(header);
  89         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, spl_image.size,
  90                 (void *)spl_image.load_addr);
  91 #endif
  92 #endif
  93         /* Load u-boot */
  94         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  95                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  96         spl_parse_image_header(header);
  97         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  98                 spl_image.size, (void *)spl_image.load_addr);
  99         nand_deselect();
 100 }