common/spl/spl_mmc.c

   1 /*
   2  * (C) Copyright 2010
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * Aneesh V <aneesh@ti.com>
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25 #include <common.h>
  26 #include <spl.h>
  27 #include <asm/u-boot.h>
  28 #include <asm/utils.h>
  29 #include <mmc.h>
  30 #include <fat.h>
  31 #include <version.h>
  32
  33 DECLARE_GLOBAL_DATA_PTR;
  34
  35 static int mmc_load_image_raw(struct mmc *mmc, unsigned long sector)
  36 {
  37         unsigned long err;
  38         u32 image_size_sectors;
  39         struct image_header *header;
  40
  41         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
  42                                                 sizeof(struct image_header));
  43
  44         /* read image header to find the image size & load address */
  45         err = mmc->block_dev.block_read(0, sector, 1, header);
  46         if (err == 0)
  47                 goto end;
  48
  49         spl_parse_image_header(header);
  50
  51         /* convert size to sectors - round up */
  52         image_size_sectors = (spl_image.size + mmc->read_bl_len - 1) /
  53                                 mmc->read_bl_len;
  54
  55         /* Read the header too to avoid extra memcpy */
  56         err = mmc->block_dev.block_read(0, sector, image_size_sectors,
  57                                         (void *)spl_image.load_addr);
  58
  59 end:
  60         if (err == 0)
  61                 printf("spl: mmc blk read err - %lu\n", err);
  62
  63         return (err == 0);
  64 }
  65
  66 #ifdef CONFIG_SPL_FAT_SUPPORT
  67 static int mmc_load_image_fat(struct mmc *mmc, const char *filename)
  68 {
  69         int err;
  70         struct image_header *header;
  71
  72         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
  73                                                 sizeof(struct image_header));
  74
  75         err = file_fat_read(filename, header, sizeof(struct image_header));
  76         if (err <= 0)
  77                 goto end;
  78
  79         spl_parse_image_header(header);
  80
  81         err = file_fat_read(filename, (u8 *)spl_image.load_addr, 0);
  82
  83 end:
  84         if (err <= 0)
  85                 printf("spl: error reading image %s, err - %d\n",
  86                        filename, err);
  87
  88         return (err <= 0);
  89 }
  90
  91 #ifdef CONFIG_SPL_OS_BOOT
  92 static int mmc_load_image_fat_os(struct mmc *mmc)
  93 {
  94         int err;
  95
  96         err = file_fat_read(CONFIG_SPL_FAT_LOAD_ARGS_NAME,
  97                             (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
  98         if (err <= 0) {
  99                 printf("spl: error reading image %s, err - %d\n",
 100                        CONFIG_SPL_FAT_LOAD_ARGS_NAME, err);
 101                 return -1;
 102         }
 103
 104         return mmc_load_image_fat(mmc, CONFIG_SPL_FAT_LOAD_KERNEL_NAME);
 105 }
 106 #endif
 107
 108 #endif
 109
 110 void spl_mmc_load_image(void)
 111 {
 112         struct mmc *mmc;
 113         int err;
 114         u32 boot_mode;
 115
 116         mmc_initialize(gd->bd);
 117         /* We register only one device. So, the dev id is always 0 */
 118         mmc = find_mmc_device(0);
 119         if (!mmc) {
 120                 puts("spl: mmc device not found!!\n");
 121                 hang();
 122         }
 123
 124         err = mmc_init(mmc);
 125         if (err) {
 126                 printf("spl: mmc init failed: err - %d\n", err);
 127                 hang();
 128         }
 129
 130         boot_mode = spl_boot_mode();
 131         if (boot_mode == MMCSD_MODE_RAW) {
 132                 debug("boot mode - RAW\n");
 133                 err = mmc_load_image_raw(mmc,
 134                                          CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR);
 135 #ifdef CONFIG_SPL_FAT_SUPPORT
 136         } else if (boot_mode == MMCSD_MODE_FAT) {
 137                 debug("boot mode - FAT\n");
 138
 139                 err = fat_register_device(&mmc->block_dev,
 140                                           CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION);
 141                 if (err) {
 142                         printf("spl: fat register err - %d\n", err);
 143                         hang();
 144                 }
 145
 146 #ifdef CONFIG_SPL_OS_BOOT
 147                 if (spl_start_uboot() || mmc_load_image_fat_os(mmc))
 148 #endif
 149                 err = mmc_load_image_fat(mmc, CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME);
 150 #endif
 151         } else {
 152                 puts("spl: wrong MMC boot mode\n");
 153                 hang();
 154         }
 155
 156         if (err)
 157                 hang();
 158 }