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/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Aneesh V <aneesh@ti.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/u-boot.h>
#include <asm/utils.h>
#include <asm/arch/sys_proto.h>
#include <mmc.h>
#include <fat.h>
#include <timestamp_autogenerated.h>
#include <version_autogenerated.h>
#include <asm/omap_common.h>
#include <asm/arch/mmc_host_def.h>
#include <i2c.h>
#include <image.h>
DECLARE_GLOBAL_DATA_PTR;
/* Define global data structure pointer to it*/
static gd_t gdata __attribute__ ((section(".data")));
static bd_t bdata __attribute__ ((section(".data")));
static const char *image_name;
static u8 image_os;
static u32 image_load_addr;
static u32 image_entry_point;
static u32 image_size;
inline void hang(void)
{
puts("### ERROR ### Please RESET the board ###\n");
for (;;)
;
}
void board_init_f(ulong dummy)
{
/*
* We call relocate_code() with relocation target same as the
* CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
* skipped. Instead, only .bss initialization will happen. That's
* all we need
*/
debug(">>board_init_f()\n");
relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
}
#ifdef CONFIG_GENERIC_MMC
int board_mmc_init(bd_t *bis)
{
switch (omap_boot_device()) {
case BOOT_DEVICE_MMC1:
omap_mmc_init(0);
break;
case BOOT_DEVICE_MMC2:
omap_mmc_init(1);
break;
}
return 0;
}
#endif
static void parse_image_header(const struct image_header *header)
{
u32 header_size = sizeof(struct image_header);
if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) {
image_size = __be32_to_cpu(header->ih_size) + header_size;
image_entry_point = __be32_to_cpu(header->ih_load);
/* Load including the header */
image_load_addr = image_entry_point - header_size;
image_os = header->ih_os;
image_name = (const char *)&header->ih_name;
debug("spl: payload image: %s load addr: 0x%x size: %d\n",
image_name, image_load_addr, image_size);
} else {
/* Signature not found - assume u-boot.bin */
printf("mkimage signature not found - ih_magic = %x\n",
header->ih_magic);
puts("Assuming u-boot.bin ..\n");
/* Let's assume U-Boot will not be more than 200 KB */
image_size = 200 * 1024;
image_entry_point = CONFIG_SYS_TEXT_BASE;
image_load_addr = CONFIG_SYS_TEXT_BASE;
image_os = IH_OS_U_BOOT;
image_name = "U-Boot";
}
}
static void mmc_load_image_raw(struct mmc *mmc)
{
u32 image_size_sectors, err;
const struct image_header *header;
header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
sizeof(struct image_header));
/* read image header to find the image size & load address */
err = mmc->block_dev.block_read(0,
CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 1,
(void *)header);
if (err <= 0)
goto end;
parse_image_header(header);
/* convert size to sectors - round up */
image_size_sectors = (image_size + MMCSD_SECTOR_SIZE - 1) /
MMCSD_SECTOR_SIZE;
/* Read the header too to avoid extra memcpy */
err = mmc->block_dev.block_read(0,
CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
image_size_sectors, (void *)image_load_addr);
end:
if (err <= 0) {
printf("spl: mmc blk read err - %d\n", err);
hang();
}
}
static void mmc_load_image_fat(struct mmc *mmc)
{
s32 err;
struct image_header *header;
header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
sizeof(struct image_header));
err = fat_register_device(&mmc->block_dev,
CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION);
if (err) {
printf("spl: fat register err - %d\n", err);
hang();
}
err = file_fat_read(CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME,
(u8 *)header, sizeof(struct image_header));
if (err <= 0)
goto end;
parse_image_header(header);
err = file_fat_read(CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME,
(u8 *)image_load_addr, 0);
end:
if (err <= 0) {
printf("spl: error reading image %s, err - %d\n",
CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME, err);
hang();
}
}
static void mmc_load_image(void)
{
struct mmc *mmc;
int err;
u32 boot_mode;
mmc_initialize(gd->bd);
/* We register only one device. So, the dev id is always 0 */
mmc = find_mmc_device(0);
if (!mmc) {
puts("spl: mmc device not found!!\n");
hang();
}
err = mmc_init(mmc);
if (err) {
printf("spl: mmc init failed: err - %d\n", err);
hang();
}
boot_mode = omap_boot_mode();
if (boot_mode == MMCSD_MODE_RAW) {
debug("boot mode - RAW\n");
mmc_load_image_raw(mmc);
} else if (boot_mode == MMCSD_MODE_FAT) {
debug("boot mode - FAT\n");
mmc_load_image_fat(mmc);
} else {
puts("spl: wrong MMC boot mode\n");
hang();
}
}
void jump_to_image_no_args(void)
{
typedef void (*image_entry_noargs_t)(void)__attribute__ ((noreturn));
image_entry_noargs_t image_entry =
(image_entry_noargs_t) image_entry_point;
image_entry();
}
void jump_to_image_no_args(void) __attribute__ ((noreturn));
void board_init_r(gd_t *id, ulong dummy)
{
u32 boot_device;
debug(">>spl:board_init_r()\n");
timer_init();
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
boot_device = omap_boot_device();
debug("boot device - %d\n", boot_device);
switch (boot_device) {
case BOOT_DEVICE_MMC1:
case BOOT_DEVICE_MMC2:
mmc_load_image();
break;
default:
printf("SPL: Un-supported Boot Device - %d!!!\n", boot_device);
hang();
break;
}
switch (image_os) {
case IH_OS_U_BOOT:
debug("Jumping to U-Boot\n");
jump_to_image_no_args();
break;
default:
puts("Unsupported OS image.. Jumping nevertheless..\n");
jump_to_image_no_args();
}
}
void preloader_console_init(void)
{
const char *u_boot_rev = U_BOOT_VERSION;
char rev_string_buffer[50];
gd = &gdata;
gd->bd = &bdata;
gd->flags |= GD_FLG_RELOC;
gd->baudrate = CONFIG_BAUDRATE;
setup_clocks_for_console();
serial_init(); /* serial communications setup */
/* Avoid a second "U-Boot" coming from this string */
u_boot_rev = &u_boot_rev[7];
printf("\nU-Boot SPL %s (%s - %s)\n", u_boot_rev, U_BOOT_DATE,
U_BOOT_TIME);
omap_rev_string(rev_string_buffer);
printf("Texas Instruments %s\n", rev_string_buffer);
}
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