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/u-boot.h>
  25 #include <asm/utils.h>
  26 #include <asm/arch/sys_proto.h>
  27 #include <asm/io.h>
  28 #include <nand.h>
  29 #include <version.h>
  30 #include <asm/omap_common.h>
  31
  32
  33 void spl_nand_load_image(void)
  34 {
  35         struct image_header *header;
  36         int *src __attribute__((unused));
  37         int *dst __attribute__((unused));
  38
  39         switch (omap_boot_mode()) {
  40         case NAND_MODE_HW_ECC:
  41                 debug("spl: nand - using hw ecc\n");
  42                 gpmc_init();
  43                 nand_init();
  44                 break;
  45         default:
  46                 puts("spl: ERROR: This bootmode is not implemented - hanging");
  47                 hang();
  48         }
  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_uboot_key()) {
  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_SAVEBP_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                         CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  76                 spl_parse_image_header(header);
  77                 nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  78                         spl_image.size, (void *)spl_image.load_addr);
  79         } else
  80 #endif
  81         {
  82 #ifdef CONFIG_NAND_ENV_DST
  83                 nand_spl_load_image(CONFIG_ENV_OFFSET,
  84                         CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  85                 spl_parse_image_header(header);
  86                 nand_spl_load_image(CONFIG_ENV_OFFSET, spl_image.size,
  87                         (void *)spl_image.load_addr);
  88 #ifdef CONFIG_ENV_OFFSET_REDUND
  89                 nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
  90                         CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  91                 spl_parse_image_header(header);
  92                 nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, spl_image.size,
  93                         (void *)spl_image.load_addr);
  94 #endif
  95 #endif
  96                 /* Load u-boot */
  97                 nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  98                         CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  99                 spl_parse_image_header(header);
 100                 nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
 101                         spl_image.size, (void *)spl_image.load_addr);
 102         }
 103         nand_deselect();
 104 }