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/*
* Copyright (C) 2011 OMICRON electronics GmbH
*
* based on drivers/mtd/nand/nand_spl_load.c
*
* Copyright (C) 2011
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
*
* 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 <spi_flash.h>
/*
* The main entry for SPI booting. It's necessary that SDRAM is already
* configured and available since this code loads the main U-Boot image
* from SPI into SDRAM and starts it from there.
*/
void spi_boot(void)
{
struct spi_flash *flash;
void (*uboot)(void) __noreturn;
/*
* Load U-Boot image from SPI flash into RAM
*/
flash = spi_flash_probe(CONFIG_SPL_SPI_BUS, CONFIG_SPL_SPI_CS,
CONFIG_SF_DEFAULT_SPEED, SPI_MODE_3);
if (!flash) {
puts("failed.\n");
hang();
}
spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS,
CONFIG_SYS_SPI_U_BOOT_SIZE,
(void *) CONFIG_SYS_TEXT_BASE);
/*
* Jump to U-Boot image
*/
uboot = (void *) CONFIG_SYS_TEXT_BASE;
(*uboot)();
}
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