diff options
author | Christian Riesch <christian.riesch@omicron.at> | 2011-12-09 09:47:35 (GMT) |
---|---|---|
committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2011-12-24 09:23:30 (GMT) |
commit | 32b1127397a305ae0bc0a55ed9c4421fb570ef78 (patch) | |
tree | 5b473b2218b4ec0047485f5ada367ede3c00198c /drivers/mtd/spi | |
parent | 7029a24f2cb50ce673eca07cf3982d8357d5a6ec (diff) | |
download | u-boot-32b1127397a305ae0bc0a55ed9c4421fb570ef78.tar.xz |
sf: Add spi_boot() to allow booting from SPI flash in an SPL
Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Cc: Heiko Schocher <hs@denx.de>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Scott Wood <scottwood@freescale.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'drivers/mtd/spi')
-rw-r--r-- | drivers/mtd/spi/Makefile | 4 | ||||
-rw-r--r-- | drivers/mtd/spi/spi_spl_load.c | 58 |
2 files changed, 62 insertions, 0 deletions
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile index 57112af..90f8392 100644 --- a/drivers/mtd/spi/Makefile +++ b/drivers/mtd/spi/Makefile @@ -25,6 +25,10 @@ include $(TOPDIR)/config.mk LIB := $(obj)libspi_flash.o +ifdef CONFIG_SPL_BUILD +COBJS-$(CONFIG_SPL_SPI_LOAD) += spi_spl_load.o +endif + COBJS-$(CONFIG_SPI_FLASH) += spi_flash.o COBJS-$(CONFIG_SPI_FLASH_ATMEL) += atmel.o COBJS-$(CONFIG_SPI_FLASH_EON) += eon.o diff --git a/drivers/mtd/spi/spi_spl_load.c b/drivers/mtd/spi/spi_spl_load.c new file mode 100644 index 0000000..1aa30ac --- /dev/null +++ b/drivers/mtd/spi/spi_spl_load.c @@ -0,0 +1,58 @@ +/* + * 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)(); +} |