[PATCH 1/2] Fix FSL NAND driver to read all ONFI parameter pages

Jane Wan
2018-04-27T00:22:32Z

Signed-off-by: Jane Wan <Jane.Wan@nokia.com>
---
drivers/mtd/nand/fsl_ifc_nand.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index ca36b35..a3cf6ca 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -413,6 +413,7 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command,
struct fsl_ifc_mtd *priv = chip->priv;
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
struct fsl_ifc_runtime __iomem *ifc = ctrl->rregs;
+ int len;

/* clear the read buffer */
ifc_nand_ctrl->read_bytes = 0;
@@ -462,11 +463,12 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command,
ifc_out32(column, &ifc->ifc_nand.row3);

/*
- * although currently it's 8 bytes for READID, we always read
- * the maximum 256 bytes(for PARAM)
+ * For READID, read 8 bytes that are currently used.
+ * For PARAM, read all 3 copies of 256-bytes pages.
*/
- ifc_out32(256, &ifc->ifc_nand.nand_fbcr);
- ifc_nand_ctrl->read_bytes = 256;
+ len = (command == NAND_CMD_PARAM) ? (3 * 256) : 8;
+ ifc_out32(len, &ifc->ifc_nand.nand_fbcr);
+ ifc_nand_ctrl->read_bytes = len;

set_addr(mtd, 0, 0, 0);
fsl_ifc_run_command(mtd);
--
1.7.9.5