From b0971e69f2ff110d6fc6e52a601e4e87d707e758 Mon Sep 17 00:00:00 2001 From: Mirko Vogt Date: Sun, 8 Apr 2012 12:09:52 +0000 Subject: level up target xburst to linux kernel version 3.2.1 Thanks to the qi-hardware project - especially to Lars, Maarten and Xiangfu SVN-Revision: 31218 --- ...-NAND-Optimize-NAND_ECC_HW_OOB_FIRST-read.patch | 45 ++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 target/linux/xburst/patches-3.2/0003-NAND-Optimize-NAND_ECC_HW_OOB_FIRST-read.patch (limited to 'target/linux/xburst/patches-3.2/0003-NAND-Optimize-NAND_ECC_HW_OOB_FIRST-read.patch') diff --git a/target/linux/xburst/patches-3.2/0003-NAND-Optimize-NAND_ECC_HW_OOB_FIRST-read.patch b/target/linux/xburst/patches-3.2/0003-NAND-Optimize-NAND_ECC_HW_OOB_FIRST-read.patch new file mode 100644 index 0000000000..b92c967e13 --- /dev/null +++ b/target/linux/xburst/patches-3.2/0003-NAND-Optimize-NAND_ECC_HW_OOB_FIRST-read.patch @@ -0,0 +1,45 @@ +From b971c50dc50c07f981a1619f977e7509db9c4eac Mon Sep 17 00:00:00 2001 +From: Lars-Peter Clausen +Date: Sat, 26 Feb 2011 15:30:07 +0100 +Subject: [PATCH 03/21] NAND: Optimize NAND_ECC_HW_OOB_FIRST read + +Avoid sending unnecessary READ commands to the chip. +--- + drivers/mtd/nand/nand_base.c | 14 ++++++++++---- + 1 files changed, 10 insertions(+), 4 deletions(-) + +diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c +index 3ed9c5e..184aa93 100644 +--- a/drivers/mtd/nand/nand_base.c ++++ b/drivers/mtd/nand/nand_base.c +@@ -1294,9 +1294,15 @@ static int nand_read_page_hwecc_oob_first(struct mtd_info *mtd, + uint8_t *ecc_calc = chip->buffers->ecccalc; + + /* Read the OOB area first */ +- chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); +- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); +- chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); ++ if (mtd->writesize > 512) { ++ chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page); ++ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); ++ chip->cmdfunc(mtd, NAND_CMD_RNDOUT, 0, -1); ++ } else { ++ chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); ++ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); ++ chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); ++ } + + for (i = 0; i < chip->ecc.total; i++) + ecc_code[i] = chip->oob_poi[eccpos[i]]; +@@ -1465,7 +1471,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, + if (realpage != chip->pagebuf || oob) { + bufpoi = aligned ? buf : chip->buffers->databuf; + +- if (likely(sndcmd)) { ++ if (likely(sndcmd) && chip->ecc.mode != NAND_ECC_HW_OOB_FIRST) { + chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); + sndcmd = 0; + } +-- +1.7.5.4 + -- cgit v1.2.3