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 --- doc/README.SPL | 1 + drivers/mtd/spi/Makefile | 4 +++ drivers/mtd/spi/spi_spl_load.c | 58 ++++++++++++++++++++++++++++++++++++++++ include/spi_flash.h | 3 ++ 4 files changed, 66 insertions(+), 0 deletions(-) create mode 100644 drivers/mtd/spi/spi_spl_load.c
diff --git a/doc/README.SPL b/doc/README.SPL index 89d24a7..f01a8bd 100644 --- a/doc/README.SPL +++ b/doc/README.SPL @@ -65,3 +65,4 @@ CONFIG_SPL_NAND_SUPPORT (drivers/mtd/nand/libnand.o) CONFIG_SPL_DMA_SUPPORT (drivers/dma/libdma.o) CONFIG_SPL_POST_MEM_SUPPORT (post/drivers/memory.o) CONFIG_SPL_NAND_LOAD (drivers/mtd/nand/nand_spl_load.o) +CONFIG_SPL_SPI_LOAD (drivers/mtd/spi/spi_spl_load.o) 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)(); +} diff --git a/include/spi_flash.h b/include/spi_flash.h index 2671ab5..9da9062 100644 --- a/include/spi_flash.h +++ b/include/spi_flash.h @@ -25,6 +25,7 @@
#include <spi.h> #include <linux/types.h> +#include <linux/compiler.h>
struct spi_flash { struct spi_slave *spi; @@ -68,4 +69,6 @@ static inline int spi_flash_erase(struct spi_flash *flash, u32 offset, return flash->erase(flash, offset, len); }
+void spi_boot(void) __noreturn; + #endif /* _SPI_FLASH_H_ */