git.sur5r.net Git - u-boot/blob - arch/arm/cpu/armv7/omap-common/spl.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 <asm/u-boot.h>
  27 #include <asm/utils.h>
  28 #include <asm/arch/sys_proto.h>
  29 #include <mmc.h>
  30 #include <fat.h>
  31 #include <timestamp_autogenerated.h>
  32 #include <version_autogenerated.h>
  33 #include <asm/omap_common.h>
  34 #include <asm/arch/mmc_host_def.h>
  35 #include <i2c.h>
  36 #include <image.h>
  37
  38 DECLARE_GLOBAL_DATA_PTR;
  39
  40 /* Define global data structure pointer to it*/
  41 static gd_t gdata __attribute__ ((section(".data")));
  42 static bd_t bdata __attribute__ ((section(".data")));
  43 static const char *image_name;
  44 static u8 image_os;
  45 static u32 image_load_addr;
  46 static u32 image_entry_point;
  47 static u32 image_size;
  48
  49 inline void hang(void)
  50 {
  51         puts("### ERROR ### Please RESET the board ###\n");
  52         for (;;)
  53                 ;
  54 }
  55
  56 void board_init_f(ulong dummy)
  57 {
  58         /*
  59          * We call relocate_code() with relocation target same as the
  60          * CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
  61          * skipped. Instead, only .bss initialization will happen. That's
  62          * all we need
  63          */
  64         debug(">>board_init_f()\n");
  65         relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
  66 }
  67
  68 #ifdef CONFIG_GENERIC_MMC
  69 int board_mmc_init(bd_t *bis)
  70 {
  71         switch (omap_boot_device()) {
  72         case BOOT_DEVICE_MMC1:
  73                 omap_mmc_init(0);
  74                 break;
  75         case BOOT_DEVICE_MMC2:
  76                 omap_mmc_init(1);
  77                 break;
  78         }
  79         return 0;
  80 }
  81 #endif
  82
  83 static void parse_image_header(const struct image_header *header)
  84 {
  85         u32 header_size = sizeof(struct image_header);
  86
  87         if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) {
  88                 image_size = __be32_to_cpu(header->ih_size) + header_size;
  89                 image_entry_point = __be32_to_cpu(header->ih_load);
  90                 /* Load including the header */
  91                 image_load_addr = image_entry_point - header_size;
  92                 image_os = header->ih_os;
  93                 image_name = (const char *)&header->ih_name;
  94                 debug("spl: payload image: %s load addr: 0x%x size: %d\n",
  95                         image_name, image_load_addr, image_size);
  96         } else {
  97                 /* Signature not found - assume u-boot.bin */
  98                 printf("mkimage signature not found - ih_magic = %x\n",
  99                         header->ih_magic);
 100                 puts("Assuming u-boot.bin ..\n");
 101                 /* Let's assume U-Boot will not be more than 200 KB */
 102                 image_size = 200 * 1024;
 103                 image_entry_point = CONFIG_SYS_TEXT_BASE;
 104                 image_load_addr = CONFIG_SYS_TEXT_BASE;
 105                 image_os = IH_OS_U_BOOT;
 106                 image_name = "U-Boot";
 107         }
 108 }
 109
 110 static void mmc_load_image_raw(struct mmc *mmc)
 111 {
 112         u32 image_size_sectors, err;
 113         const struct image_header *header;
 114
 115         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
 116                                                 sizeof(struct image_header));
 117
 118         /* read image header to find the image size & load address */
 119         err = mmc->block_dev.block_read(0,
 120                         CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 1,
 121                         (void *)header);
 122
 123         if (err <= 0)
 124                 goto end;
 125
 126         parse_image_header(header);
 127
 128         /* convert size to sectors - round up */
 129         image_size_sectors = (image_size + MMCSD_SECTOR_SIZE - 1) /
 130                                 MMCSD_SECTOR_SIZE;
 131
 132         /* Read the header too to avoid extra memcpy */
 133         err = mmc->block_dev.block_read(0,
 134                         CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
 135                         image_size_sectors, (void *)image_load_addr);
 136
 137 end:
 138         if (err <= 0) {
 139                 printf("spl: mmc blk read err - %d\n", err);
 140                 hang();
 141         }
 142 }
 143
 144 static void mmc_load_image_fat(struct mmc *mmc)
 145 {
 146         s32 err;
 147         struct image_header *header;
 148
 149         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
 150                                                 sizeof(struct image_header));
 151
 152         err = fat_register_device(&mmc->block_dev,
 153                                 CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION);
 154         if (err) {
 155                 printf("spl: fat register err - %d\n", err);
 156                 hang();
 157         }
 158
 159         err = file_fat_read(CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME,
 160                                 (u8 *)header, sizeof(struct image_header));
 161         if (err <= 0)
 162                 goto end;
 163
 164         parse_image_header(header);
 165
 166         err = file_fat_read(CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME,
 167                                 (u8 *)image_load_addr, 0);
 168
 169 end:
 170         if (err <= 0) {
 171                 printf("spl: error reading image %s, err - %d\n",
 172                         CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME, err);
 173                 hang();
 174         }
 175 }
 176
 177 static void mmc_load_image(void)
 178 {
 179         struct mmc *mmc;
 180         int err;
 181         u32 boot_mode;
 182
 183         mmc_initialize(gd->bd);
 184         /* We register only one device. So, the dev id is always 0 */
 185         mmc = find_mmc_device(0);
 186         if (!mmc) {
 187                 puts("spl: mmc device not found!!\n");
 188                 hang();
 189         }
 190
 191         err = mmc_init(mmc);
 192         if (err) {
 193                 printf("spl: mmc init failed: err - %d\n", err);
 194                 hang();
 195         }
 196
 197         boot_mode = omap_boot_mode();
 198         if (boot_mode == MMCSD_MODE_RAW) {
 199                 debug("boot mode - RAW\n");
 200                 mmc_load_image_raw(mmc);
 201         } else if (boot_mode == MMCSD_MODE_FAT) {
 202                 debug("boot mode - FAT\n");
 203                 mmc_load_image_fat(mmc);
 204         } else {
 205                 puts("spl: wrong MMC boot mode\n");
 206                 hang();
 207         }
 208 }
 209
 210 void jump_to_image_no_args(void)
 211 {
 212         typedef void (*image_entry_noargs_t)(void)__attribute__ ((noreturn));
 213         image_entry_noargs_t image_entry =
 214                         (image_entry_noargs_t) image_entry_point;
 215
 216         image_entry();
 217 }
 218
 219 void jump_to_image_no_args(void) __attribute__ ((noreturn));
 220 void board_init_r(gd_t *id, ulong dummy)
 221 {
 222         u32 boot_device;
 223         debug(">>spl:board_init_r()\n");
 224
 225         timer_init();
 226         i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 227
 228         boot_device = omap_boot_device();
 229         debug("boot device - %d\n", boot_device);
 230         switch (boot_device) {
 231         case BOOT_DEVICE_MMC1:
 232         case BOOT_DEVICE_MMC2:
 233                 mmc_load_image();
 234                 break;
 235         default:
 236                 printf("SPL: Un-supported Boot Device - %d!!!\n", boot_device);
 237                 hang();
 238                 break;
 239         }
 240
 241         switch (image_os) {
 242         case IH_OS_U_BOOT:
 243                 debug("Jumping to U-Boot\n");
 244                 jump_to_image_no_args();
 245                 break;
 246         default:
 247                 puts("Unsupported OS image.. Jumping nevertheless..\n");
 248                 jump_to_image_no_args();
 249         }
 250 }
 251
 252 void preloader_console_init(void)
 253 {
 254         const char *u_boot_rev = U_BOOT_VERSION;
 255         char rev_string_buffer[50];
 256
 257         gd = &gdata;
 258         gd->bd = &bdata;
 259         gd->flags |= GD_FLG_RELOC;
 260         gd->baudrate = CONFIG_BAUDRATE;
 261
 262         setup_clocks_for_console();
 263         serial_init();          /* serial communications setup */
 264
 265         /* Avoid a second "U-Boot" coming from this string */
 266         u_boot_rev = &u_boot_rev[7];
 267
 268         printf("\nU-Boot SPL %s (%s - %s)\n", u_boot_rev, U_BOOT_DATE,
 269                 U_BOOT_TIME);
 270         omap_rev_string(rev_string_buffer);
 271         printf("Texas Instruments %s\n", rev_string_buffer);
 272 }