From a75bbe71a27875fdc61cde1af6d799037cef6bed Mon Sep 17 00:00:00 2001 From: Jane Wan Date: Tue, 8 May 2018 14:19:53 -0700 Subject: [PATCH] mtd: rawnand: fsl_ifc: fix FSL NAND driver to read all ONFI parameter pages Per ONFI specification (Rev. 4.0), if the CRC of the first parameter page read is not valid, the host should read redundant parameter page copies. Fix FSL NAND driver to read the two redundant copies which are mandatory in the specification. Signed-off-by: Jane Wan Signed-off-by: Boris Brezillon --- drivers/mtd/nand/raw/fsl_ifc_nand.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/mtd/nand/raw/fsl_ifc_nand.c b/drivers/mtd/nand/raw/fsl_ifc_nand.c index 00a609d..382b67e 100644 --- a/drivers/mtd/nand/raw/fsl_ifc_nand.c +++ b/drivers/mtd/nand/raw/fsl_ifc_nand.c @@ -342,9 +342,16 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command, case NAND_CMD_READID: case NAND_CMD_PARAM: { + /* + * For READID, read 8 bytes that are currently used. + * For PARAM, read all 3 copies of 256-bytes pages. + */ + int len = 8; int timing = IFC_FIR_OP_RB; - if (command == NAND_CMD_PARAM) + if (command == NAND_CMD_PARAM) { timing = IFC_FIR_OP_RBCD; + len = 256 * 3; + } ifc_out32((IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | (IFC_FIR_OP_UA << IFC_NAND_FIR0_OP1_SHIFT) | @@ -354,12 +361,8 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command, &ifc->ifc_nand.nand_fcr0); ifc_out32(column, &ifc->ifc_nand.row3); - /* - * although currently it's 8 bytes for READID, we always read - * the maximum 256 bytes(for PARAM) - */ - ifc_out32(256, &ifc->ifc_nand.nand_fbcr); - ifc_nand_ctrl->read_bytes = 256; + 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); -- 2.7.4