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| author | Boris Brezillon <boris.brezillon@free-electrons.com> | 2018-01-23 13:13:17 +0300 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2018-01-25 11:14:20 +0300 |
| commit | 4c7e95b1b3286a2ba704790018a35510344958f2 (patch) | |
| tree | 7894f9f33418684d6ac80d2e076285bade5c9a2c /drivers/mtd | |
| parent | c1a72e2dbb4abb90bd408480d7c48ba40cb799ce (diff) | |
| download | linux-4c7e95b1b3286a2ba704790018a35510344958f2.tar.xz | |
mtd: nand: gpmi: Fix subpage reads
Commit 25f815f66a14 ("mtd: nand: force drivers to explicitly send
READ/PROG commands") added a call to nand_read_page_op() in
gpmi_ecc_read_page(), which means this function now sends a READ0
command and place the data pointer at the beginning of the page. This
logic is breaking gpmi_ecc_read_subpage() which was calling
gpmi_ecc_read_page() and expected it to only retrieve the data without
sending the READ0 command.
Create a gpmi_ecc_read_page_data() helper which only does the data
retrieval and ECC correction steps and implement gpmi_ecc_read_page()
as a wrapper that calls nand_read_page_op()+gpmi_ecc_read_page_data().
This way, gpmi_ecc_read_subpage() can call gpmi_ecc_read_page_data()
which restores the logic we had before commit 25f815f66a14 ("mtd: nand:
force drivers to explicitly send READ/PROG commands").
Fixes: 25f815f66a14 ("mtd: nand: force drivers to explicitly send READ/PROG commands")
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Acked-by: Han Xu <han.xu@nxp.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c index b51db8c85405..ab9a0a2ed3b2 100644 --- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c @@ -1029,11 +1029,13 @@ static void block_mark_swapping(struct gpmi_nand_data *this, p[1] = (p[1] & mask) | (from_oob >> (8 - bit)); } -static int gpmi_ecc_read_page(struct mtd_info *mtd, struct nand_chip *chip, - uint8_t *buf, int oob_required, int page) +static int gpmi_ecc_read_page_data(struct nand_chip *chip, + uint8_t *buf, int oob_required, + int page) { struct gpmi_nand_data *this = nand_get_controller_data(chip); struct bch_geometry *nfc_geo = &this->bch_geometry; + struct mtd_info *mtd = nand_to_mtd(chip); void *payload_virt; dma_addr_t payload_phys; void *auxiliary_virt; @@ -1043,8 +1045,6 @@ static int gpmi_ecc_read_page(struct mtd_info *mtd, struct nand_chip *chip, unsigned int max_bitflips = 0; int ret; - nand_read_page_op(chip, page, 0, NULL, 0); - dev_dbg(this->dev, "page number is : %d\n", page); ret = read_page_prepare(this, buf, nfc_geo->payload_size, this->payload_virt, this->payload_phys, @@ -1178,6 +1178,14 @@ static int gpmi_ecc_read_page(struct mtd_info *mtd, struct nand_chip *chip, return max_bitflips; } +static int gpmi_ecc_read_page(struct mtd_info *mtd, struct nand_chip *chip, + uint8_t *buf, int oob_required, int page) +{ + nand_read_page_op(chip, page, 0, NULL, 0); + + return gpmi_ecc_read_page_data(chip, buf, oob_required, page); +} + /* Fake a virtual small page for the subpage read */ static int gpmi_ecc_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, uint32_t offs, uint32_t len, uint8_t *buf, int page) @@ -1256,7 +1264,7 @@ static int gpmi_ecc_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, /* Read the subpage now */ this->swap_block_mark = false; - max_bitflips = gpmi_ecc_read_page(mtd, chip, buf, 0, page); + max_bitflips = gpmi_ecc_read_page_data(chip, buf, 0, page); /* Restore */ writel(r1_old, bch_regs + HW_BCH_FLASH0LAYOUT0); |