aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorBoris Brezillon <boris.brezillon@free-electrons.com>2015-09-02 15:05:52 +0200
committerBoris Brezillon <boris.brezillon@free-electrons.com>2016-04-19 22:05:39 +0200
commit1c1bdd6f866e08b2a34318ce089b678200e8de85 (patch)
treebf0680c61b0aaa69f5aa296be3fd7f4f4caa886d
parent9d02fc2a5129449581c3108c260e96377cf35f7e (diff)
mtd: nand: sunxi: implement ->read_oob()/->write_oob()
Allwinner's ECC engine is capable of protecting a few bytes of the OOB area. Implement specific OOB functions to benefit from this capability. Also, when in raw mode, the randomizer is disabled, which means you'll only be able to retrieve randomized data, which is not really useful for most applications. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
-rw-r--r--drivers/mtd/nand/sunxi_nand.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c
index e30276d..d8ad50f 100644
--- a/drivers/mtd/nand/sunxi_nand.c
+++ b/drivers/mtd/nand/sunxi_nand.c
@@ -1073,6 +1073,40 @@ static int sunxi_nfc_hw_syndrome_ecc_write_page(struct mtd_info *mtd,
return 0;
}
+static int sunxi_nfc_hw_common_ecc_read_oob(struct mtd_info *mtd,
+ struct nand_chip *chip,
+ int page)
+{
+ chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
+
+ chip->pagebuf = -1;
+
+ return chip->ecc.read_page(mtd, chip, chip->buffers->databuf, 1, page);
+}
+
+static int sunxi_nfc_hw_common_ecc_write_oob(struct mtd_info *mtd,
+ struct nand_chip *chip,
+ int page)
+{
+ int ret, status;
+
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0, page);
+
+ chip->pagebuf = -1;
+
+ memset(chip->buffers->databuf, 0xff, mtd->writesize);
+ ret = chip->ecc.write_page(mtd, chip, chip->buffers->databuf, 1, page);
+ if (ret)
+ return ret;
+
+ /* Send command to program the OOB data */
+ chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+
+ status = chip->waitfunc(mtd, chip);
+
+ return status & NAND_STATUS_FAIL ? -EIO : 0;
+}
+
static const s32 tWB_lut[] = {6, 12, 16, 20};
static const s32 tRHW_lut[] = {4, 8, 12, 20};
@@ -1320,6 +1354,8 @@ static int sunxi_nand_hw_common_ecc_ctrl_init(struct mtd_info *mtd,
layout->eccbytes = (ecc->bytes * nsectors);
+ ecc->read_oob = sunxi_nfc_hw_common_ecc_read_oob;
+ ecc->write_oob = sunxi_nfc_hw_common_ecc_write_oob;
ecc->layout = layout;
ecc->priv = data;
@@ -1351,6 +1387,8 @@ static int sunxi_nand_hw_ecc_ctrl_init(struct mtd_info *mtd,
ecc->read_page = sunxi_nfc_hw_ecc_read_page;
ecc->write_page = sunxi_nfc_hw_ecc_write_page;
+ ecc->read_oob_raw = nand_read_oob_std;
+ ecc->write_oob_raw = nand_write_oob_std;
layout = ecc->layout;
nsectors = mtd->writesize / ecc->size;
@@ -1405,6 +1443,8 @@ static int sunxi_nand_hw_syndrome_ecc_ctrl_init(struct mtd_info *mtd,
ecc->prepad = 4;
ecc->read_page = sunxi_nfc_hw_syndrome_ecc_read_page;
ecc->write_page = sunxi_nfc_hw_syndrome_ecc_write_page;
+ ecc->read_oob_raw = nand_read_oob_syndrome;
+ ecc->write_oob_raw = nand_write_oob_syndrome;
layout = ecc->layout;
nsectors = mtd->writesize / ecc->size;