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[xburst] jz4740_nand:

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* Use NAND_ECC_HW_OOB_FIRST mode instead of a patched NAND_ECC_HW
* Fix subpage writing
* speed up reading


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19875 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
lars
2010-02-26 18:09:12 +00:00
parent 1f928356b8
commit a35f8c9470
2 changed files with 45 additions and 67 deletions
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47
target/linux/xburst/patches-2.6.32/050-nand.patch
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@@ -31,49 +31,4 @@ Subject: [PATCH] /opt/Projects/openwrt/target/linux/xburst/patches-2.6.31/050-na
+obj-$(CONFIG_MTD_NAND_JZ4740) += jz4740_nand.o
nand-objs := nand_base.o nand_bbt.o
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -956,29 +956,22 @@ static int nand_read_page_hwecc(struct m
uint8_t *ecc_calc = chip->buffers->ecccalc;
uint8_t *ecc_code = chip->buffers->ecccode;
uint32_t *eccpos = chip->ecc.layout->eccpos;
-
- for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- chip->ecc.hwctl(mtd, NAND_ECC_READ);
- chip->read_buf(mtd, p, eccsize);
- chip->ecc.calculate(mtd, p, &ecc_calc[i]);
- }
- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+ int stat;
for (i = 0; i < chip->ecc.total; i++)
ecc_code[i] = chip->oob_poi[eccpos[i]];
- eccsteps = chip->ecc.steps;
- p = buf;
-
- for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- int stat;
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ chip->ecc.hwctl(mtd, NAND_ECC_READ);
+ chip->read_buf(mtd, p, eccsize);
stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
if (stat < 0)
mtd->ecc_stats.failed++;
else
mtd->ecc_stats.corrected += stat;
}
+
return 0;
}
@@ -1178,6 +1171,8 @@ static int nand_do_read_ops(struct mtd_i
bufpoi = aligned ? buf : chip->buffers->databuf;
if (likely(sndcmd)) {
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, 0x00, page);
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
sndcmd = 0;
}