[U-Boot] [PATCH v3 6/9] da850/omap-l138: Add support to read u-boot image from MMC/SD
Prabhakar Lad
prabhakar.lad at ti.com
Thu Jun 21 09:51:28 CEST 2012
From: Lad, Prabhakar <prabhakar.lad at ti.com>
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.
Signed-off-by: Lad, Prabhakar <prabhakar.lad at ti.com>
Signed-off-by: Rajashekhara, Sudhakar <sudhakar.raj at ti.com>
Signed-off-by: Hadli, Manjunath <manjunath.hadli at ti.com>
---
Changes for v2: None
Changes for v3:
1: Moved the patch down the series to make it readable.
2: Fixed comment from Christian to have CONFIG_SPL_MMC_LOAD
config only while loading from MMC.
3: Changed print statement while loading from MMC.
arch/arm/cpu/arm926ejs/davinci/spl.c | 9 +++++
drivers/mmc/Makefile | 4 ++
drivers/mmc/spl_mmc_load.c | 62 ++++++++++++++++++++++++++++++++++
include/configs/da850evm.h | 10 +++++
include/mmc.h | 2 +
5 files changed, 87 insertions(+), 0 deletions(-)
create mode 100644 drivers/mmc/spl_mmc_load.c
diff --git a/arch/arm/cpu/arm926ejs/davinci/spl.c b/arch/arm/cpu/arm926ejs/davinci/spl.c
index 7d9b289..66bc566 100644
--- a/arch/arm/cpu/arm926ejs/davinci/spl.c
+++ b/arch/arm/cpu/arm926ejs/davinci/spl.c
@@ -28,6 +28,11 @@
#include <ns16550.h>
#include <malloc.h>
#include <spi_flash.h>
+#include <mmc.h>
+#include <fat.h>
+#include <version.h>
+#include <asm/arch/davinci_misc.h>
+#include <asm/arch/pinmux_defs.h>
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
@@ -96,4 +101,8 @@ void board_init_r(gd_t *id, ulong dummy)
puts("SPI boot...\n");
spi_boot();
#endif
+#ifdef CONFIG_SPL_MMC_LOAD
+ puts("MMC boot...\n");
+ spl_mmc_load();
+#endif
}
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index c245352..2cf4431 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..347dcfe
--- /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 <common.h>
+#include <mmc.h>
+
+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_SPI_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);
+}
diff --git a/include/configs/da850evm.h b/include/configs/da850evm.h
index 4e5f160..57fc0c0 100644
--- a/include/configs/da850evm.h
+++ b/include/configs/da850evm.h
@@ -352,6 +352,16 @@
#define CONFIG_SPL_TEXT_BASE 0x80000000
#define CONFIG_SPL_MAX_SIZE 32768
+
+/* Load U-Boot Image From MMC */
+#ifdef CONFIG_SPL_MMC_LOAD
+#define CONFIG_SPL_MMC_SUPPORT
+#define CONFIG_SPL_FAT_SUPPORT
+#define CONFIG_SPL_LIBDISK_SUPPORT
+#define CONFIG_SYS_MMC_U_BOOT_OFFS 0x75
+#undef CONFIG_SPL_SPI_LOAD
+#endif
+
/* additions for new relocation code, must added to all boards */
#define CONFIG_SYS_SDRAM_BASE 0xc0000000
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + 0x1000 - /* Fix this */ \
diff --git a/include/mmc.h b/include/mmc.h
index f52df70..282b54d 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -27,6 +27,7 @@
#define _MMC_H_
#include <linux/list.h>
+#include <linux/compiler.h>
#define SD_VERSION_SD 0x20000
#define SD_VERSION_2 (SD_VERSION_SD | 0x20)
@@ -320,6 +321,7 @@ int get_mmc_num(void);
int board_mmc_getcd(struct mmc *mmc);
int mmc_switch_part(int dev_num, unsigned int part_num);
int mmc_getcd(struct mmc *mmc);
+void spl_mmc_load(void) __noreturn;
#ifdef CONFIG_GENERIC_MMC
#define mmc_host_is_spi(mmc) ((mmc)->host_caps & MMC_MODE_SPI)
--
1.7.4.1
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