| 1 | From 4f28237a750afd1112b6f1266d36f8b718efe89c Mon Sep 17 00:00:00 2001 |
| 2 | From: Xiangfu Liu <xiangfu@sharism.cc> |
| 3 | Date: Tue, 6 Mar 2012 11:19:26 +0800 |
| 4 | Subject: [PATCH 05/21] NAND-Optimize-reading-the-eec-data-for-the-JZ4740 |
| 5 | |
| 6 | --- |
| 7 | drivers/mtd/nand/nand_base.c | 14 ++++---------- |
| 8 | 1 files changed, 4 insertions(+), 10 deletions(-) |
| 9 | |
| 10 | --- a/drivers/mtd/nand/nand_base.c |
| 11 | +++ b/drivers/mtd/nand/nand_base.c |
| 12 | @@ -1295,8 +1295,8 @@ static int nand_read_page_hwecc_oob_firs |
| 13 | |
| 14 | /* Read the OOB area first */ |
| 15 | if (mtd->writesize > 512) { |
| 16 | - chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page); |
| 17 | - chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 18 | + chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize + eccpos[0], page); |
| 19 | + chip->read_buf(mtd, ecc_code, chip->ecc.total); |
| 20 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, 0, -1); |
| 21 | } else { |
| 22 | chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); |
| 23 | @@ -1304,9 +1304,6 @@ static int nand_read_page_hwecc_oob_firs |
| 24 | chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); |
| 25 | } |
| 26 | |
| 27 | - for (i = 0; i < chip->ecc.total; i++) |
| 28 | - ecc_code[i] = chip->oob_poi[eccpos[i]]; |
| 29 | - |
| 30 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 31 | int stat; |
| 32 | |
| 33 | @@ -1361,8 +1358,8 @@ static int nand_read_subpage_hwecc_oob_f |
| 34 | |
| 35 | /* Read the OOB area first */ |
| 36 | if (mtd->writesize > 512) { |
| 37 | - chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page); |
| 38 | - chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 39 | + chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize + eccpos[0], page); |
| 40 | + chip->read_buf(mtd, ecc_code, chip->ecc.total); |
| 41 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, data_col_addr, -1); |
| 42 | } else { |
| 43 | chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); |
| 44 | @@ -1370,9 +1367,6 @@ static int nand_read_subpage_hwecc_oob_f |
| 45 | chip->cmdfunc(mtd, NAND_CMD_READ0, data_col_addr, page); |
| 46 | } |
| 47 | |
| 48 | - for (i = 0; i < chip->ecc.total; i++) |
| 49 | - ecc_code[i] = chip->oob_poi[eccpos[i]]; |
| 50 | - |
| 51 | p = bufpoi + data_col_addr; |
| 52 | |
| 53 | for (i = eccbytes * start_step; num_steps; num_steps--, i += eccbytes, p += eccsize) { |
| 54 | |
