From 59fdd5b96aa633ffd40e8ce314f126206dfff86f Mon Sep 17 00:00:00 2001 From: Prabhakar Kushwaha Date: Mon, 9 Apr 2012 10:55:22 +0530 Subject: [PATCH] mtd: IFC NAND: Add support of ONFI NAND flash - Fix NAND_CMD_READID command for ONFI detect. - Add NAND_CMD_PARAM command to read the ONFI parameter page. Signed-off-by: Prabhakar Kushwaha Acked-by: Scott Wood Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/nand/fsl_ifc_nand.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c index c30ac7b83d28..5387cec53c9a 100644 --- a/drivers/mtd/nand/fsl_ifc_nand.c +++ b/drivers/mtd/nand/fsl_ifc_nand.c @@ -375,21 +375,31 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command, return; - /* READID must read all 8 possible bytes */ case NAND_CMD_READID: + case NAND_CMD_PARAM: { + int timing = IFC_FIR_OP_RB; + if (command == NAND_CMD_PARAM) + timing = IFC_FIR_OP_RBCD; + out_be32(&ifc->ifc_nand.nand_fir0, (IFC_FIR_OP_CMD0 << IFC_NAND_FIR0_OP0_SHIFT) | (IFC_FIR_OP_UA << IFC_NAND_FIR0_OP1_SHIFT) | - (IFC_FIR_OP_RB << IFC_NAND_FIR0_OP2_SHIFT)); + (timing << IFC_NAND_FIR0_OP2_SHIFT)); out_be32(&ifc->ifc_nand.nand_fcr0, - NAND_CMD_READID << IFC_NAND_FCR0_CMD0_SHIFT); - /* 8 bytes for manuf, device and exts */ - out_be32(&ifc->ifc_nand.nand_fbcr, 8); - ifc_nand_ctrl->read_bytes = 8; + command << IFC_NAND_FCR0_CMD0_SHIFT); + out_be32(&ifc->ifc_nand.row3, column); + + /* + * although currently it's 8 bytes for READID, we always read + * the maximum 256 bytes(for PARAM) + */ + out_be32(&ifc->ifc_nand.nand_fbcr, 256); + ifc_nand_ctrl->read_bytes = 256; set_addr(mtd, 0, 0, 0); fsl_ifc_run_command(mtd); return; + } /* ERASE1 stores the block and page address */ case NAND_CMD_ERASE1: -- 2.20.1