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 <nand.h>
  30 #include <mmc.h>
  31 #include <fat.h>
  32 #include <timestamp_autogenerated.h>
  33 #include <version_autogenerated.h>
  34 #include <asm/omap_common.h>
  35 #include <asm/arch/mmc_host_def.h>
  36 #include <i2c.h>
  37 #include <image.h>
  38
  39 DECLARE_GLOBAL_DATA_PTR;
  40
  41 /* Define global data structure pointer to it*/
  42 static gd_t gdata __attribute__ ((section(".data")));
  43 static bd_t bdata __attribute__ ((section(".data")));
  44 static const char *image_name;
  45 static u8 image_os;
  46 static u32 image_load_addr;
  47 static u32 image_entry_point;
  48 static u32 image_size;
  49
  50 inline void hang(void)
  51 {
  52         puts("### ERROR ### Please RESET the board ###\n");
  53         for (;;)
  54                 ;
  55 }
  56
  57 void board_init_f(ulong dummy)
  58 {
  59         /*
  60          * We call relocate_code() with relocation target same as the
  61          * CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
  62          * skipped. Instead, only .bss initialization will happen. That's
  63          * all we need
  64          */
  65         debug(">>board_init_f()\n");
  66         relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
  67 }
  68
  69 #ifdef CONFIG_GENERIC_MMC
  70 int board_mmc_init(bd_t *bis)
  71 {
  72         switch (omap_boot_device()) {
  73         case BOOT_DEVICE_MMC1:
  74                 omap_mmc_init(0);
  75                 break;
  76         case BOOT_DEVICE_MMC2:
  77                 omap_mmc_init(1);
  78                 break;
  79         }
  80         return 0;
  81 }
  82 #endif
  83
  84 static void parse_image_header(const struct image_header *header)
  85 {
  86         u32 header_size = sizeof(struct image_header);
  87
  88         if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) {
  89                 image_size = __be32_to_cpu(header->ih_size) + header_size;
  90                 image_entry_point = __be32_to_cpu(header->ih_load);
  91                 /* Load including the header */
  92                 image_load_addr = image_entry_point - header_size;
  93                 image_os = header->ih_os;
  94                 image_name = (const char *)&header->ih_name;
  95                 debug("spl: payload image: %s load addr: 0x%x size: %d\n",
  96                         image_name, image_load_addr, image_size);
  97         } else {
  98                 /* Signature not found - assume u-boot.bin */
  99                 printf("mkimage signature not found - ih_magic = %x\n",
 100                         header->ih_magic);
 101                 puts("Assuming u-boot.bin ..\n");
 102                 /* Let's assume U-Boot will not be more than 200 KB */
 103                 image_size = 200 * 1024;
 104                 image_entry_point = CONFIG_SYS_TEXT_BASE;
 105                 image_load_addr = CONFIG_SYS_TEXT_BASE;
 106                 image_os = IH_OS_U_BOOT;
 107                 image_name = "U-Boot";
 108         }
 109 }
 110
 111 static void mmc_load_image_raw(struct mmc *mmc)
 112 {
 113         u32 image_size_sectors, err;
 114         const struct image_header *header;
 115
 116         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
 117                                                 sizeof(struct image_header));
 118
 119         /* read image header to find the image size & load address */
 120         err = mmc->block_dev.block_read(0,
 121                         CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 1,
 122                         (void *)header);
 123
 124         if (err <= 0)
 125                 goto end;
 126
 127         parse_image_header(header);
 128
 129         /* convert size to sectors - round up */
 130         image_size_sectors = (image_size + MMCSD_SECTOR_SIZE - 1) /
 131                                 MMCSD_SECTOR_SIZE;
 132
 133         /* Read the header too to avoid extra memcpy */
 134         err = mmc->block_dev.block_read(0,
 135                         CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
 136                         image_size_sectors, (void *)image_load_addr);
 137
 138 end:
 139         if (err <= 0) {
 140                 printf("spl: mmc blk read err - %d\n", err);
 141                 hang();
 142         }
 143 }
 144
 145 static void mmc_load_image_fat(struct mmc *mmc)
 146 {
 147         s32 err;
 148         struct image_header *header;
 149
 150         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
 151                                                 sizeof(struct image_header));
 152
 153         err = fat_register_device(&mmc->block_dev,
 154                                 CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION);
 155         if (err) {
 156                 printf("spl: fat register err - %d\n", err);
 157                 hang();
 158         }
 159
 160         err = file_fat_read(CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME,
 161                                 (u8 *)header, sizeof(struct image_header));
 162         if (err <= 0)
 163                 goto end;
 164
 165         parse_image_header(header);
 166
 167         err = file_fat_read(CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME,
 168                                 (u8 *)image_load_addr, 0);
 169
 170 end:
 171         if (err <= 0) {
 172                 printf("spl: error reading image %s, err - %d\n",
 173                         CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME, err);
 174                 hang();
 175         }
 176 }
 177 static void mmc_load_image(void) __attribute__((unused));
 178 static void mmc_load_image(void)
 179 {
 180         struct mmc *mmc;
 181         int err;
 182         u32 boot_mode;
 183
 184         mmc_initialize(gd->bd);
 185         /* We register only one device. So, the dev id is always 0 */
 186         mmc = find_mmc_device(0);
 187         if (!mmc) {
 188                 puts("spl: mmc device not found!!\n");
 189                 hang();
 190         }
 191
 192         err = mmc_init(mmc);
 193         if (err) {
 194                 printf("spl: mmc init failed: err - %d\n", err);
 195                 hang();
 196         }
 197
 198         boot_mode = omap_boot_mode();
 199         if (boot_mode == MMCSD_MODE_RAW) {
 200                 debug("boot mode - RAW\n");
 201                 mmc_load_image_raw(mmc);
 202         } else if (boot_mode == MMCSD_MODE_FAT) {
 203                 debug("boot mode - FAT\n");
 204                 mmc_load_image_fat(mmc);
 205         } else {
 206                 puts("spl: wrong MMC boot mode\n");
 207                 hang();
 208         }
 209 }
 210
 211 #ifdef CONFIG_SPL_NAND_SUPPORT
 212 static void nand_load_image(void) __attribute__ ((unused));
 213 static void nand_load_image(void)
 214 {
 215         struct image_header *header;
 216
 217         gpmc_init();
 218         nand_init();
 219
 220         /*use CONFIG_SYS_TEXT_BASE as temporary storage area */
 221         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
 222
 223 #ifdef CONFIG_NAND_ENV_DST
 224         nand_spl_load_image(CONFIG_ENV_OFFSET,
 225                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
 226         parse_image_header(header);
 227         nand_spl_load_image(CONFIG_ENV_OFFSET, image_size,
 228                 (void *)image_load_addr);
 229 #ifdef CONFIG_ENV_OFFSET_REDUND
 230         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
 231                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
 232         parse_image_header(header);
 233         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, image_size,
 234                 (void *)image_load_addr);
 235 #endif
 236 #endif
 237         /* Load u-boot */
 238         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
 239                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
 240         parse_image_header(header);
 241         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
 242                 image_size, (void *)image_load_addr);
 243         nand_deselect();
 244 }
 245 #endif /* CONFIG_SPL_NAND_SUPPORT */
 246 void jump_to_image_no_args(void)
 247 {
 248         typedef void (*image_entry_noargs_t)(void)__attribute__ ((noreturn));
 249         image_entry_noargs_t image_entry =
 250                         (image_entry_noargs_t) image_entry_point;
 251
 252         debug("image entry point: 0x%X\n", image_entry_point);
 253         image_entry();
 254 }
 255
 256 void jump_to_image_no_args(void) __attribute__ ((noreturn));
 257 void board_init_r(gd_t *id, ulong dummy)
 258 {
 259         u32 boot_device;
 260         debug(">>spl:board_init_r()\n");
 261
 262         timer_init();
 263         i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 264
 265         boot_device = omap_boot_device();
 266         debug("boot device - %d\n", boot_device);
 267         switch (boot_device) {
 268 #ifdef CONFIG_SPL_MMC_SUPPORT
 269         case BOOT_DEVICE_MMC1:
 270         case BOOT_DEVICE_MMC2:
 271                 mmc_load_image();
 272                 break;
 273 #endif
 274 #ifdef CONFIG_SPL_NAND_SUPPORT
 275         case BOOT_DEVICE_NAND:
 276                 nand_load_image();
 277                 break;
 278 #endif
 279         default:
 280                 printf("SPL: Un-supported Boot Device - %d!!!\n", boot_device);
 281                 hang();
 282                 break;
 283         }
 284
 285         switch (image_os) {
 286         case IH_OS_U_BOOT:
 287                 debug("Jumping to U-Boot\n");
 288                 jump_to_image_no_args();
 289                 break;
 290         default:
 291                 puts("Unsupported OS image.. Jumping nevertheless..\n");
 292                 jump_to_image_no_args();
 293         }
 294 }
 295
 296 /* This requires UART clocks to be enabled */
 297 void preloader_console_init(void)
 298 {
 299         const char *u_boot_rev = U_BOOT_VERSION;
 300         char rev_string_buffer[50];
 301
 302         gd = &gdata;
 303         gd->bd = &bdata;
 304         gd->flags |= GD_FLG_RELOC;
 305         gd->baudrate = CONFIG_BAUDRATE;
 306
 307         serial_init();          /* serial communications setup */
 308
 309         /* Avoid a second "U-Boot" coming from this string */
 310         u_boot_rev = &u_boot_rev[7];
 311
 312         printf("\nU-Boot SPL %s (%s - %s)\n", u_boot_rev, U_BOOT_DATE,
 313                 U_BOOT_TIME);
 314         omap_rev_string(rev_string_buffer);
 315         printf("Texas Instruments %s\n", rev_string_buffer);
 316 }