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| author | Guennadi Liakhovetski <lg@denx.de> | 2008-08-06 21:42:07 +0200 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2008-08-12 11:31:32 -0500 |
| commit | aa646643b6bc250cb3a4966bf728876e0c10d329 (patch) | |
| tree | 09af8a50c8ef75cbc17594ebc487c615de6494a8 /nand_spl | |
| parent | 4f32d7760a58fe73981b6edc0b0751565d2daa4c (diff) | |
| download | u-boot-imx-aa646643b6bc250cb3a4966bf728876e0c10d329.zip u-boot-imx-aa646643b6bc250cb3a4966bf728876e0c10d329.tar.gz u-boot-imx-aa646643b6bc250cb3a4966bf728876e0c10d329.tar.bz2 | |
nand_spl: Support page-aligned read in nand_load, use chipselect
Supporting page-aligned reads doesn't incure any sinificant overhead, just
a small change in the algorithm. Also replace in_8 with readb, since there
is no in_8 on ARM.
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'nand_spl')
| -rw-r--r-- | nand_spl/nand_boot.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/nand_spl/nand_boot.c b/nand_spl/nand_boot.c index 81b4dfc..16d128f 100644 --- a/nand_spl/nand_boot.c +++ b/nand_spl/nand_boot.c @@ -131,7 +131,7 @@ static int nand_is_bad_block(struct mtd_info *mtd, int block) /* * Read one byte */ - if (in_8(this->IO_ADDR_R) != 0xff) + if (readb(this->IO_ADDR_R) != 0xff) return 1; return 0; @@ -184,29 +184,33 @@ static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst) return 0; } -static int nand_load(struct mtd_info *mtd, int offs, int uboot_size, uchar *dst) +static int nand_load(struct mtd_info *mtd, unsigned int offs, + unsigned int uboot_size, uchar *dst) { - int block; - int blockcopy_count; - int page; + unsigned int block, lastblock; + unsigned int page; /* - * offs has to be aligned to a block address! + * offs has to be aligned to a page address! */ block = offs / CFG_NAND_BLOCK_SIZE; - blockcopy_count = 0; + lastblock = (offs + uboot_size - 1) / CFG_NAND_BLOCK_SIZE; + page = (offs % CFG_NAND_BLOCK_SIZE) / CFG_NAND_PAGE_SIZE; - while (blockcopy_count < (uboot_size / CFG_NAND_BLOCK_SIZE)) { + while (block <= lastblock) { if (!nand_is_bad_block(mtd, block)) { /* * Skip bad blocks */ - for (page = 0; page < CFG_NAND_PAGE_COUNT; page++) { + while (page < CFG_NAND_PAGE_COUNT) { nand_read_page(mtd, block, page, dst); dst += CFG_NAND_PAGE_SIZE; + page++; } - blockcopy_count++; + page = 0; + } else { + lastblock++; } block++; @@ -235,12 +239,18 @@ void nand_boot(void) nand_chip.dev_ready = NULL; /* preset to NULL */ board_nand_init(&nand_chip); + if (nand_chip.select_chip) + nand_chip.select_chip(&nand_info, 0); + /* * Load U-Boot image from NAND into RAM */ ret = nand_load(&nand_info, CFG_NAND_U_BOOT_OFFS, CFG_NAND_U_BOOT_SIZE, (uchar *)CFG_NAND_U_BOOT_DST); + if (nand_chip.select_chip) + nand_chip.select_chip(&nand_info, -1); + /* * Jump to U-Boot image */ |