git.sur5r.net Git - u-boot/blob - 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 void spl_nand_load_image(void)
  33 {
  34         struct image_header *header;
  35         int *src __attribute__((unused));
  36         int *dst __attribute__((unused));
  37
  38         switch (omap_boot_mode()) {
  39         case NAND_MODE_HW_ECC:
  40                 debug("spl: nand - using hw ecc\n");
  41                 gpmc_init();
  42                 nand_init();
  43                 break;
  44         default:
  45                 puts("spl: ERROR: This bootmode is not implemented - hanging");
  46                 hang();
  47         }
  48
  49         /*use CONFIG_SYS_TEXT_BASE as temporary storage area */
  50         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
  51 #ifdef CONFIG_SPL_OS_BOOT
  52         if (!spl_start_uboot()) {
  53                 /*
  54                  * load parameter image
  55                  * load to temp position since nand_spl_load_image reads
  56                  * a whole block which is typically larger than
  57                  * CONFIG_CMD_SPL_WRITE_SIZE therefore may overwrite
  58                  * following sections like BSS
  59                  */
  60                 nand_spl_load_image(CONFIG_CMD_SPL_NAND_OFS,
  61                         CONFIG_CMD_SPL_WRITE_SIZE,
  62                         (void *)CONFIG_SYS_TEXT_BASE);
  63                 /* copy to destintion */
  64                 for (dst = (int *)CONFIG_SYS_SPL_ARGS_ADDR,
  65                                 src = (int *)CONFIG_SYS_TEXT_BASE;
  66                                 src < (int *)(CONFIG_SYS_TEXT_BASE +
  67                                 CONFIG_CMD_SPL_WRITE_SIZE);
  68                                 src++, dst++) {
  69                         writel(readl(src), dst);
  70                 }
  71
  72                 /* load linux */
  73                 nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  74                         CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  75                 spl_parse_image_header(header);
  76                 if (header->ih_os == IH_OS_LINUX) {
  77                         /* happy - was a linux */
  78                         nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  79                                 spl_image.size, (void *)spl_image.load_addr);
  80                         nand_deselect();
  81                         return;
  82                 } else {
  83                         printf("The Expected Linux image was not"
  84                                 "found. Please check your NAND"
  85                                 "configuration.\n");
  86                         printf("Trying to start u-boot now...\n");
  87                 }
  88         }
  89 #endif
  90 #ifdef CONFIG_NAND_ENV_DST
  91         nand_spl_load_image(CONFIG_ENV_OFFSET,
  92                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  93         spl_parse_image_header(header);
  94         nand_spl_load_image(CONFIG_ENV_OFFSET, spl_image.size,
  95                 (void *)spl_image.load_addr);
  96 #ifdef CONFIG_ENV_OFFSET_REDUND
  97         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
  98                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  99         spl_parse_image_header(header);
 100         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, spl_image.size,
 101                 (void *)spl_image.load_addr);
 102 #endif
 103 #endif
 104         /* Load u-boot */
 105         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
 106                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
 107         spl_parse_image_header(header);
 108         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
 109                 spl_image.size, (void *)spl_image.load_addr);
 110         nand_deselect();
 111 }