[U-Boot] [PATCH] [OneNAND IPL] OneNAND board init support

Kyungmin Park
2009-08-29T04:00:59Z

Some CPU has internal OneNAND controller and use it for access OneNAND

To support these CPU, we provide the onenand_board_init
Also we can override the onenand_read_page.

Some minor fixed:
- Remove unnecessary header file
- Fix wrong access at read interrupt
- The recent OneNAND has 4KiB pagesize

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
diff --git a/onenand_ipl/onenand_boot.c b/onenand_ipl/onenand_boot.c
index 63995ce..22baebb 100644
--- a/onenand_ipl/onenand_boot.c
+++ b/onenand_ipl/onenand_boot.c
@@ -24,7 +24,6 @@
*/

#include <common.h>
-#include <version.h>

#include "onenand_ipl.h"

diff --git a/onenand_ipl/onenand_ipl.h b/onenand_ipl/onenand_ipl.h
index 412572a..2257063 100644
--- a/onenand_ipl/onenand_ipl.h
+++ b/onenand_ipl/onenand_ipl.h
@@ -29,7 +29,14 @@
#define THIS_ONENAND(a) (CONFIG_SYS_ONENAND_BASE + (a))

#define READ_INTERRUPT() \
- onenand_readw(THIS_ONENAND(ONENAND_REG_INTERRUPT))
+ onenand_readw(ONENAND_REG_INTERRUPT)

+enum {
+ ONENAND_USE_DEFAULT,
+ ONENAND_USE_GENERIC,
+};
+
+extern int (*onenand_read_page)(ulong block, ulong page,
+ u_char *buf, int pagesize);
extern int onenand_read_block(unsigned char *buf);
#endif
diff --git a/onenand_ipl/onenand_read.c b/onenand_ipl/onenand_read.c
index d1a842d..7fc0c62 100644
--- a/onenand_ipl/onenand_read.c
+++ b/onenand_ipl/onenand_read.c
@@ -1,5 +1,5 @@
/*
- * (C) Copyright 2005-2008 Samsung Electronis
+ * (C) Copyright 2005-2009 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
*
* See file CREDITS for list of people who contributed to this
@@ -37,8 +37,11 @@
extern void *memcpy32(void *dest, void *src, int size);
#endif

+int (*onenand_read_page)(ulong block, ulong page,
+ u_char *buf, int pagesize);
+
/* read a page with ECC */
-static inline int onenand_read_page(ulong block, ulong page,
+static int generic_onenand_read_page(ulong block, ulong page,
u_char * buf, int pagesize)
{
unsigned long *base;
@@ -89,9 +92,29 @@ static inline int onenand_read_page(ulong block, ulong page,
return 0;
}

-#define ONENAND_START_PAGE 1
+#ifndef CONFIG_ONENAND_START_PAGE
+#define CONFIG_ONENAND_START_PAGE 1
+#endif
#define ONENAND_PAGES_PER_BLOCK 64

+#ifndef CONFIG_ONENAND_BOARD_INIT
+static int onenand_generic_init(int *page_is_4KiB, int *page)
+{
+ int dev_id, density;
+
+ if (onenand_readw(ONENAND_REG_TECHNOLOGY))
+ *page_is_4KiB = 1;
+ dev_id = onenand_readw(ONENAND_REG_DEVICE_ID);
+ density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
+ density &= ONENAND_DEVICE_DENSITY_MASK;
+ if (density >= ONENAND_DEVICE_DENSITY_4Gb &&
+ !(dev_id & ONENAND_DEVICE_IS_DDP))
+ *page_is_4KiB = 1;
+
+ return ONENAND_USE_DEFAULT;
+}
+#endif
+
/**
* onenand_read_block - Read CONFIG_SYS_MONITOR_LEN from begining
* of OneNAND, skipping bad blocks
@@ -99,24 +122,31 @@ static inline int onenand_read_page(ulong block, ulong page,
*/
int onenand_read_block(unsigned char *buf)
{
- int block;
- int page = ONENAND_START_PAGE, offset = 0;
- int pagesize = 0, erase_shift = 0;
- int erasesize = 0, nblocks = 0;
+ int block, nblocks;
+ int page = CONFIG_ONENAND_START_PAGE, offset = 0;
+ int pagesize, erasesize, erase_shift;
+ int page_is_4KiB = 0, ret;
+
+ pagesize = 2048; /* OneNAND has 2KiB pagesize */
+ erase_shift = 17;
+ onenand_read_page = generic_onenand_read_page;
+
+#ifdef CONFIG_ONENAND_BOARD_INIT
+ onenand_board_init(&page_is_4KiB, &page);
+#else
+ onenand_generic_init(&page_is_4KiB, &page);
+#endif

- if (onenand_readw(ONENAND_REG_TECHNOLOGY)) {
- pagesize = 4096; /* MLC OneNAND has 4KiB pagesize */
+ if (page_is_4KiB) {
+ pagesize = 4096; /* OneNAND has 4KiB pagesize */
erase_shift = 18;
- } else {
- pagesize = 2048;
- erase_shift = 17;
}

- erasesize = ONENAND_PAGES_PER_BLOCK * pagesize;
+ erasesize = (1 << erase_shift);
nblocks = (CONFIG_SYS_MONITOR_LEN + erasesize - 1) >> erase_shift;

/* NOTE: you must read page from page 1 of block 0 */
- /* read the block page by page*/
+ /* read the block page by page */
for (block = 0; block < nblocks; block++) {
for (; page < ONENAND_PAGES_PER_BLOCK; page++) {
if (onenand_read_page(block, page, buf + offset,