From 0d986e61e26280c93b7e261c98b1f606bb9ddc5a Mon Sep 17 00:00:00 2001 From: "Lad, Prabhakar" Date: Sun, 24 Jun 2012 21:35:20 +0000 Subject: da850/omap-l138: Add support to read u-boot image from MMC/SD DA850/OMAP-L138 does not support strict MMC/SD boot mode. SPL will be in SPI flash and U-Boot image will be in MMC/SD card. SPL will do the low level initialization and then loads the u-boot image from MMC/SD card. Define CONFIG_SPL_MMC_LOAD macro in the DA850/OMAP-L138 configuration file to enable this feature. Tested-by: Christian Riesch Signed-off-by: Lad, Prabhakar Signed-off-by: Rajashekhara, Sudhakar Signed-off-by: Hadli, Manjunath --- drivers/mmc/Makefile | 4 +++ drivers/mmc/spl_mmc_load.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+) create mode 100644 drivers/mmc/spl_mmc_load.c (limited to 'drivers') diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index c567737..2b96cdc 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -25,6 +25,10 @@ include $(TOPDIR)/config.mk LIB := $(obj)libmmc.o +ifdef CONFIG_SPL_MMC_LOAD +COBJS-$(CONFIG_SPL_MMC_LOAD) += spl_mmc_load.o +endif + COBJS-$(CONFIG_BFIN_SDH) += bfin_sdh.o COBJS-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o COBJS-$(CONFIG_FSL_ESDHC) += fsl_esdhc.o diff --git a/drivers/mmc/spl_mmc_load.c b/drivers/mmc/spl_mmc_load.c new file mode 100644 index 0000000..79a68fb --- /dev/null +++ b/drivers/mmc/spl_mmc_load.c @@ -0,0 +1,62 @@ +/* + * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/ + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +static void mmc_load_image(struct mmc *mmc) +{ + s32 err; + void (*uboot)(void) __noreturn; + + err = mmc->block_dev.block_read(0, CONFIG_SYS_MMC_U_BOOT_OFFS, + CONFIG_SYS_MMC_U_BOOT_SIZE/512, + (u32 *)CONFIG_SYS_TEXT_BASE); + + if (err <= 0) { + printf("spl: error reading image %s, err - %d\n", + "u-boot.img", err); + hang(); + } + uboot = (void *) CONFIG_SYS_TEXT_BASE; + (*uboot)(); +} + +void spl_mmc_load(void) +{ + struct mmc *mmc; + int err; + void (mmc_load_image)(struct mmc *mmc) __noreturn; + + mmc_initialize(gd->bd); + mmc = find_mmc_device(0); + if (!mmc) { + puts("spl: mmc device not found!!\n"); + hang(); + } else { + puts("spl: mmc device found\n"); + } + err = mmc_init(mmc); + if (err) { + printf("spl: mmc init failed: err - %d\n", err); + hang(); + } + mmc_load_image(mmc); +} -- cgit v1.1