arch/arm/cpu/armv7/omap-common/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 <asm/spl.h>
  25 #include <asm/u-boot.h>
  26 #include <asm/utils.h>
  27 #include <asm/io.h>
  28 #include <nand.h>
  29 #include <version.h>
  30
  31 void spl_nand_load_image(void)
  32 {
  33         struct image_header *header;
  34         int *src __attribute__((unused));
  35         int *dst __attribute__((unused));
  36
  37         debug("spl: nand - using hw ecc\n");
  38         nand_init();
  39
  40         /*use CONFIG_SYS_TEXT_BASE as temporary storage area */
  41         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
  42 #ifdef CONFIG_SPL_OS_BOOT
  43         if (!spl_start_uboot()) {
  44                 /*
  45                  * load parameter image
  46                  * load to temp position since nand_spl_load_image reads
  47                  * a whole block which is typically larger than
  48                  * CONFIG_CMD_SPL_WRITE_SIZE therefore may overwrite
  49                  * following sections like BSS
  50                  */
  51                 nand_spl_load_image(CONFIG_CMD_SPL_NAND_OFS,
  52                         CONFIG_CMD_SPL_WRITE_SIZE,
  53                         (void *)CONFIG_SYS_TEXT_BASE);
  54                 /* copy to destintion */
  55                 for (dst = (int *)CONFIG_SYS_SPL_ARGS_ADDR,
  56                                 src = (int *)CONFIG_SYS_TEXT_BASE;
  57                                 src < (int *)(CONFIG_SYS_TEXT_BASE +
  58                                 CONFIG_CMD_SPL_WRITE_SIZE);
  59                                 src++, dst++) {
  60                         writel(readl(src), dst);
  61                 }
  62
  63                 /* load linux */
  64                 nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  65                         CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  66                 spl_parse_image_header(header);
  67                 if (header->ih_os == IH_OS_LINUX) {
  68                         /* happy - was a linux */
  69                         nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  70                                 spl_image.size, (void *)spl_image.load_addr);
  71                         nand_deselect();
  72                         return;
  73                 } else {
  74                         printf("The Expected Linux image was not"
  75                                 "found. Please check your NAND"
  76                                 "configuration.\n");
  77                         printf("Trying to start u-boot now...\n");
  78                 }
  79         }
  80 #endif
  81 #ifdef CONFIG_NAND_ENV_DST
  82         nand_spl_load_image(CONFIG_ENV_OFFSET,
  83                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  84         spl_parse_image_header(header);
  85         nand_spl_load_image(CONFIG_ENV_OFFSET, spl_image.size,
  86                 (void *)spl_image.load_addr);
  87 #ifdef CONFIG_ENV_OFFSET_REDUND
  88         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
  89                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  90         spl_parse_image_header(header);
  91         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, spl_image.size,
  92                 (void *)spl_image.load_addr);
  93 #endif
  94 #endif
  95         /* Load u-boot */
  96         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  97                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  98         spl_parse_image_header(header);
  99         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
 100                 spl_image.size, (void *)spl_image.load_addr);
 101         nand_deselect();
 102 }