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authorKyungmin Park <kmpark@infradead.org>2008-03-17 08:54:06 +0900
committerWolfgang Denk <wd@denx.de>2008-03-26 00:05:32 +0100
commit1bb707c39a0833e91d9f797dd862aaaaf4af264d (patch)
tree025e32303ffb6760c96aebbd769dac9c2a93ce46 /onenand_ipl/onenand_read.c
parentc512389cc4a10253249271ff6c887c6dab1f0db2 (diff)
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Add 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>
Diffstat (limited to 'onenand_ipl/onenand_read.c')
-rw-r--r--onenand_ipl/onenand_read.c29
1 files changed, 19 insertions, 10 deletions
diff --git a/onenand_ipl/onenand_read.c b/onenand_ipl/onenand_read.c
index f553220..669b1ef 100644
--- a/onenand_ipl/onenand_read.c
+++ b/onenand_ipl/onenand_read.c
@@ -33,8 +33,13 @@
#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 +51,15 @@ 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 +74,9 @@ 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 +92,22 @@ 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;