[U-Boot] [PATCH V7 3/7] omap-common: add nand spl support

[Simon Schwarz]

Add NAND support for the new SPL structure.

Signed-off-by: Simon Schwarz <simonschwarzcor at gmail.com>
---
This patch didn't exist before V2!

V2 changes:
ADD Some define-barriers for OMAP3 to only use NAND
ADD nand_load_image() - inits the OMAP gpmc, loads the images - parses the
	header
CHG cosmetic
ADD do_reset() implementation for omap-common spl
ADD nand_copy_image to nand.h
ADD CPP barriers for mmc and nand support. The parts depending on library
	support are only compiled if the respective library is included.

V3 changes:
ADD Comment why setup_clocks_for_console() isn't called for OMAP3
CHG cosmetic (deleted empty line)
CHG rename of NAND_MODE_HW to NAND_MODE_HW_ECC
DEL NAND_MODE_SW. Not used.

V4 changes:
CHG cosmetic - style problems

V5 changes:
CHG renamed nand_copy_image to nand_spl_load_image
CHG offs paramter of nand_spl_load_image is of type loff_t now

V6 changes:
ADD call to nand_deselect after loading the images
ADD nand_deselect to nand.h

V7 changes:
DEL some CONFIG_SPL_* relying on garbage collection now
ADD mmc_load_image and nand_load_image now have __attribute__((unused)) to
	prevent warnings when the lib is not added to SPL
DEL do_reset() isn't used anymore
CHG header based loading in SPL

Transition from V1 to V2 also includes that this patch is now based on
	- the new SPL layout by Aneesh V and Daniel Schwierzeck
  	- the OMAP4 SPL patches by Aneesh V
---
 arch/arm/cpu/armv7/omap-common/spl.c |   42 +++++++++++++++++++++++++++++++++-
 arch/arm/include/asm/omap_common.h   |    1 +
 include/nand.h                       |    3 ++
 3 files changed, 45 insertions(+), 1 deletions(-)

diff --git a/arch/arm/cpu/armv7/omap-common/spl.c b/arch/arm/cpu/armv7/omap-common/spl.c
index 1d301f4..3681ec0 100644
--- a/arch/arm/cpu/armv7/omap-common/spl.c
+++ b/arch/arm/cpu/armv7/omap-common/spl.c
@@ -26,6 +26,7 @@
 #include <asm/u-boot.h>
 #include <asm/utils.h>
 #include <asm/arch/sys_proto.h>
+#include <nand.h>
 #include <mmc.h>
 #include <fat.h>
 #include <timestamp_autogenerated.h>
@@ -173,7 +174,7 @@ end:
 		hang();
 	}
 }
-
+static void mmc_load_image(void) __attribute__((unused));
 static void mmc_load_image(void)
 {
 	struct mmc *mmc;
@@ -207,6 +208,38 @@ static void mmc_load_image(void)
 	}
 }
 
+static void nand_load_image(void) __attribute__ ((unused));
+static void nand_load_image(void)
+{
+	const struct image_header *header;
+
+	gpmc_init();
+	nand_init();
+
+	/*use CONFIG_SYS_TEXT_BASE as temporary storage area */
+	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
+
+#ifdef CONFIG_NAND_ENV_DST
+	nand_spl_read_page(CONFIG_ENV_OFFSET, (void *)header);
+	parse_image_header(header);
+	nand_spl_load_image(CONFIG_ENV_OFFSET, image_size,
+		(void *)image_load_addr);
+#ifdef CONFIG_ENV_OFFSET_REDUND
+	nand_spl_read_page(CONFIG_ENV_OFFSET_REDUND, (void *)header);
+	parse_image_header(header);
+	nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, image_size,
+		(void *)image_load_addr);
+#endif
+#endif
+	/* Load u-boot */
+	nand_spl_read_page(CONFIG_SYS_NAND_U_BOOT_OFFS, (void *)header);
+	parse_image_header(header);
+	nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
+		image_size, (void *)image_load_addr);
+
+	nand_deselect();
+}
+
 void jump_to_image_no_args(void)
 {
 	typedef void (*image_entry_noargs_t)(void)__attribute__ ((noreturn));
@@ -228,10 +261,17 @@ void board_init_r(gd_t *id, ulong dummy)
 	boot_device = omap_boot_device();
 	debug("boot device - %d\n", boot_device);
 	switch (boot_device) {
+#ifdef CONFIG_SPL_MMC_SUPPORT
 	case BOOT_DEVICE_MMC1:
 	case BOOT_DEVICE_MMC2:
 		mmc_load_image();
 		break;
+#endif
+#ifdef CONFIG_SPL_NAND_SUPPORT
+	case BOOT_DEVICE_NAND:
+		nand_load_image();
+		break;
+#endif
 	default:
 		printf("SPL: Un-supported Boot Device - %d!!!\n", boot_device);
 		hang();
diff --git a/arch/arm/include/asm/omap_common.h b/arch/arm/include/asm/omap_common.h
index d3cb857..13f6884 100644
--- a/arch/arm/include/asm/omap_common.h
+++ b/arch/arm/include/asm/omap_common.h
@@ -49,6 +49,7 @@ void preloader_console_init(void);
 #define	MMCSD_MODE_UNDEFINED	0
 #define MMCSD_MODE_RAW		1
 #define MMCSD_MODE_FAT		2
+#define NAND_MODE_HW_ECC	3
 
 u32 omap_boot_device(void);
 u32 omap_boot_mode(void);
diff --git a/include/nand.h b/include/nand.h
index 8d94b5c..3c5ef4e 100644
--- a/include/nand.h
+++ b/include/nand.h
@@ -132,6 +132,9 @@ int nand_lock( nand_info_t *meminfo, int tight );
 int nand_unlock( nand_info_t *meminfo, ulong start, ulong length );
 int nand_get_lock_status(nand_info_t *meminfo, loff_t offset);
 
+void nand_spl_load_image(loff_t offs, unsigned int size, uchar *dst);
+void nand_deselect(void);
+
 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
 void board_nand_select_device(struct nand_chip *nand, int chip);
 #endif
-- 
1.7.4.1