[U-Boot-Users] [PATCH] Flex-OneNAND booting support

[Kyungmin Park <kmpark@infradead.org>]

Flex-OneNAND booting support

Flex-OneNAND is a monolithic integrated circuit with a NAND Flash array using a NOR Flash interface. This on-chip integration enables system designers to reduce external system logic and use high-density NAND Flash in applications that would otherwise have to use more NOR components.
Flex-OneNAND enables users to configure to partition it into SLC and MLC areas in more flexible way. While MLC area of Flex-OneNAND can be used to store data that require low reliability and high density, SLC area of Flex-OneNAND to store data that need high reliability and high performance. Flex-OneNAND can let users take advantage of storing these two different types of data into one chip, which is making Flex-OneNAND more cost- and space-effective.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
diff --git a/Makefile b/Makefile
index 9512b71..e9010b6 100644
--- a/Makefile
+++ b/Makefile
@@ -333,10 +333,12 @@ $(U_BOOT_NAND):	$(NAND_SPL) $(obj)u-boot.bin $(obj)include/autoconf.mk
 		cat $(obj)nand_spl/u-boot-spl-16k.bin $(obj)u-boot.bin > $(obj)u-boot-nand.bin
 
 $(ONENAND_IPL):	$(VERSION_FILE)	$(obj)include/autoconf.mk
-		$(MAKE) -C onenand_ipl/board/$(BOARDDIR) all
+		$(MAKE) -C $(obj)onenand_ipl/board/$(BOARDDIR) all
 
 $(U_BOOT_ONENAND):	$(ONENAND_IPL) $(obj)u-boot.bin $(obj)include/autoconf.mk
+		$(MAKE) -C $(obj)onenand_ipl/board/$(BOARDDIR) all
 		cat $(obj)onenand_ipl/onenand-ipl-2k.bin $(obj)u-boot.bin > $(obj)u-boot-onenand.bin
+		cat $(obj)onenand_ipl/onenand-ipl-4k.bin $(obj)u-boot.bin > $(obj)u-boot-flexonenand.bin
 
 $(VERSION_FILE):
 		@( echo -n "#define U_BOOT_VERSION \"U-Boot " ; \
@@ -2914,7 +2916,9 @@ clean:
 	@rm -f $(obj)include/bmp_logo.h
 	@rm -f $(obj)nand_spl/u-boot-spl $(obj)nand_spl/u-boot-spl.map
 	@rm -f $(obj)onenand_ipl/onenand-ipl $(obj)onenand_ipl/onenand-ipl.bin \
-		$(obj)onenand_ipl/onenand-ipl-2k.bin $(obj)onenand_ipl/onenand-ipl.map
+		$(obj)onenand_ipl/onenand-ipl-2k.bin \
+		$(obj)onenand_ipl/onenand-ipl-4k.bin \
+		$(obj)onenand_ipl/onenand-ipl.map
 	@rm -f $(obj)api_examples/demo $(VERSION_FILE)
 
 clobber:	clean
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index d4003a2..3b828fb 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -1180,6 +1180,12 @@ static int onenand_probe(struct mtd_info *mtd)
 	if (maf_id != bram_maf_id || dev_id != bram_dev_id)
 		return -ENXIO;
 
+	/* FIXME : Current OneNAND MTD doesn't support Flex-OneNAND */
+	if (dev_id & (1 << 9)) {
+		printk("Not yet support Flex-OneNAND\n");
+		return -ENXIO;
+	}
+
 	/* Flash device information */
 	onenand_print_device_info(dev_id, 0);
 	this->device_id = dev_id;
diff --git a/onenand_ipl/board/apollon/Makefile b/onenand_ipl/board/apollon/Makefile
index 66a0959..f10ed02 100644
--- a/onenand_ipl/board/apollon/Makefile
+++ b/onenand_ipl/board/apollon/Makefile
@@ -9,7 +9,7 @@ AFLAGS	+= -DCONFIG_ONENAND_IPL
 CFLAGS	+= -DCONFIG_ONENAND_IPL
 OBJCLFAGS += --gap-fill=0x00
 
-SOBJS	= start.o low_levelinit.o # _memcpy32.o
+SOBJS	= start.o low_levelinit.o
 COBJS	= apollon.o onenand_read.o onenand_boot.o
 
 SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
@@ -19,13 +19,16 @@ LNDIR	:= $(OBJTREE)/onenand_ipl/board/$(BOARDDIR)
 
 onenandobj	:= $(OBJTREE)/onenand_ipl/
 
-ALL	= $(onenandobj)onenand-ipl $(onenandobj)onenand-ipl.bin $(onenandobj)onenand-ipl-2k.bin
+ALL	= $(onenandobj)onenand-ipl $(onenandobj)onenand-ipl.bin $(onenandobj)onenand-ipl-2k.bin $(onenandobj)onenand-ipl-4k.bin
 
 all:	$(obj).depend $(ALL)
 
 $(onenandobj)onenand-ipl-2k.bin:	$(onenandobj)onenand-ipl
 	$(OBJCOPY) ${OBJCFLAGS} --pad-to=0x800 -O binary $< $@
 
+$(onenandobj)onenand-ipl-4k.bin:	$(onenandobj)onenand-ipl
+	$(OBJCOPY) ${OBJCFLAGS} --pad-to=0x1000 -O binary $< $@
+
 $(onenandobj)onenand-ipl.bin:	$(onenandobj)onenand-ipl
 	$(OBJCOPY) ${OBJCFLAGS} -O binary $< $@
 
diff --git a/onenand_ipl/board/apollon/low_levelinit.S b/onenand_ipl/board/apollon/low_levelinit.S
diff --git a/onenand_ipl/onenand_boot.c b/onenand_ipl/onenand_boot.c
index f30deae..35668ac 100644
--- a/onenand_ipl/onenand_boot.c
+++ b/onenand_ipl/onenand_boot.c
@@ -60,7 +60,7 @@ void start_oneboot(void)
 
 	buf = (uchar *) CFG_LOAD_ADDR;
 
-	if (!onenand_read_block(buf, ONENAND_START_BLOCK))
+	if (!onenand_read_block0(buf))
 		buf += ONENAND_BLOCK_SIZE;
 
 	if (buf == (uchar *)CFG_LOAD_ADDR)
diff --git a/onenand_ipl/onenand_ipl.h b/onenand_ipl/onenand_ipl.h
index b9c6669..9188b96 100644
--- a/onenand_ipl/onenand_ipl.h
+++ b/onenand_ipl/onenand_ipl.h
@@ -23,7 +23,6 @@
 
 #include <linux/mtd/onenand_regs.h>
 
-#define ONENAND_START_BLOCK             0
 #define ONENAND_BLOCK_SIZE              2048
 
 #ifndef CFG_PRINTF
@@ -40,5 +39,5 @@
 
 #define ONENAND_PAGE_SIZE                       2048
 
-extern int onenand_read_block(unsigned char *buf, ulong block);
+extern int onenand_read_block0(unsigned char *buf);
 #endif
diff --git a/onenand_ipl/onenand_read.c b/onenand_ipl/onenand_read.c
index f553220..a0c4acf 100644
--- a/onenand_ipl/onenand_read.c
+++ b/onenand_ipl/onenand_read.c
@@ -33,8 +33,12 @@
 #define onenand_buffer_address()		((1 << 3) << 8)
 #define onenand_bufferram_address(block)	(0)
 
+#ifdef __HAVE_ARCH_MEMCPY32
+extern void *memcpy32(void *dest, void *src, int size);
+#endif
+
 /* read a page with ECC */
-static inline int onenand_read_page(ulong block, ulong page, u_char *buf)
+static inline int onenand_read_page(ulong block, ulong page, u_char *buf, int pagesize)
 {
 	unsigned long *base;
 
@@ -46,15 +50,15 @@ static inline int onenand_read_page(ulong block, ulong page, u_char *buf)
 	onenand_writew(onenand_block_address(block),
 		THIS_ONENAND(ONENAND_REG_START_ADDRESS1));
 
+	onenand_writew(onenand_bufferram_address(block),
+		THIS_ONENAND(ONENAND_REG_START_ADDRESS2));
+
 	onenand_writew(onenand_sector_address(page),
 		THIS_ONENAND(ONENAND_REG_START_ADDRESS8));
 
 	onenand_writew(onenand_buffer_address(),
 		THIS_ONENAND(ONENAND_REG_START_BUFFER));
 
-	onenand_writew(onenand_bufferram_address(block),
-		THIS_ONENAND(ONENAND_REG_START_ADDRESS2));
-
 	onenand_writew(ONENAND_INT_CLEAR, THIS_ONENAND(ONENAND_REG_INTERRUPT));
 
 	onenand_writew(ONENAND_CMD_READ, THIS_ONENAND(ONENAND_REG_COMMAND));
@@ -69,9 +73,9 @@ static inline int onenand_read_page(ulong block, ulong page, u_char *buf)
 
 #ifdef __HAVE_ARCH_MEMCPY32
 	/* 32 bytes boundary memory copy */
-	memcpy32(buf, base, ONENAND_PAGE_SIZE);
+	memcpy32(buf, base, pagesize);
 #else
-	for (offset = 0; offset < (ONENAND_PAGE_SIZE >> 2); offset++) {
+	for (offset = 0; offset < (pagesize >> 2); offset++) {
 		value = *(base + offset);
 		*p++ = value;
 	}
@@ -87,18 +91,22 @@ static inline int onenand_read_page(ulong block, ulong page, u_char *buf)
  * onenand_read_block - Read a block data to buf
  * @return 0 on success
  */
-int onenand_read_block(unsigned char *buf, ulong block)
+int onenand_read_block0(unsigned char *buf)
 {
 	int page, offset = 0;
+	int pagesize = ONENAND_PAGE_SIZE;
+
+	/* MLC OneNAND has 4KiB page size */
+	if (onenand_readw(THIS_ONENAND(ONENAND_REG_TECHNOLOGY)))
+		pagesize <<= 1;
 
 	/* NOTE: you must read page from page 1 of block 0 */
 	/* read the block page by page*/
 	for (page = ONENAND_START_PAGE;
 	    page < ONENAND_PAGES_PER_BLOCK; page++) {
 
-		onenand_read_page(block, page, buf + offset);
-
-		offset += ONENAND_PAGE_SIZE;
+		onenand_read_page(0, page, buf + offset, pagesize);
+		offset += pagesize;
 	}
 
 	return 0;