[U-Boot] [PATCH] Fix OneNAND ipl to read 256KB

[Rohit Hagargundgi]

Hi,

Here is the updated patch.

Thanks,
Rohit

Signed-off-by: Rohit Hagargundgi <h.rohit at samsung.com>
---
  include/configs/apollon.h  |    1 +
  onenand_ipl/onenand_read.c |   27 ++++++++++++++++++++-------
  2 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/include/configs/apollon.h b/include/configs/apollon.h
index dff47fc..2e8198f 100644
--- a/include/configs/apollon.h
+++ b/include/configs/apollon.h
@@ -254,6 +254,7 @@

  /* OneNAND boot, OneNAND has CS0, NOR boot ONeNAND has CS2 */
  #define	CONFIG_SYS_ONENAND_BASE	0x00000000
+#define CONFIG_SYS_MONITOR_LEN		SZ_256K	/* U-Boot image size */
  #define	CONFIG_ENV_IS_IN_ONENAND	1
  #define CONFIG_ENV_ADDR		0x00020000

diff --git a/onenand_ipl/onenand_read.c b/onenand_ipl/onenand_read.c
index 6d04943..6782eac 100644
--- a/onenand_ipl/onenand_read.c
+++ b/onenand_ipl/onenand_read.c
@@ -72,6 +72,10 @@ static inline int onenand_read_page(ulong block, ulong page,
  	while (!(READ_INTERRUPT() & ONENAND_INT_READ))
  		continue;

+	/* Check for invalid block mark*/
+	if (page < 2 && (onenand_readw(THIS_ONENAND(ONENAND_SPARERAM)) != 0xffff))
+		return 1;
+
  #ifdef __HAVE_ARCH_MEMCPY32
  	/* 32 bytes boundary memory copy */
  	memcpy32(buf, base, pagesize);
@@ -94,20 +98,29 @@ static inline int onenand_read_page(ulong block, ulong page,
   */
  int onenand_read_block0(unsigned char *buf)
  {
-	int page, offset = 0;
+	int block = 0, page, offset = 0;
  	int pagesize = ONENAND_PAGE_SIZE;
+	int nblocks = CONFIG_SYS_MONITOR_LEN / (ONENAND_PAGES_PER_BLOCK * ONENAND_PAGE_SIZE);

  	/* MLC OneNAND has 4KiB page size */
-	if (onenand_readw(THIS_ONENAND(ONENAND_REG_TECHNOLOGY)))
+	if (onenand_readw(THIS_ONENAND(ONENAND_REG_TECHNOLOGY))) {
  		pagesize <<= 1;
+		nblocks = (nblocks + 1) >> 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(0, page, buf + offset, pagesize);
-		offset += pagesize;
+	page = ONENAND_START_PAGE;
+	for (; block < nblocks; block++) {
+		for (; page < ONENAND_PAGES_PER_BLOCK; page++) {
+			if (onenand_read_page(block, page, buf + offset, pagesize)) {
+				/* This block is bad. Skip it and read next block */
+				nblocks++;
+				break;
+			}
+			offset += pagesize;
+		}
+		page = 0;
  	}

  	return 0;
-- 
1.6.0.6