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authorPrabhakar Kushwaha <prabhakar@freescale.com>2012-04-08 18:57:18 +0000
committerScott Wood <scott@tyr.buserror.net>2012-05-18 18:13:50 -0500
commit807fc702e0b09ac7bc335acfd3b0f54f9f08b643 (patch)
tree68c85e40f32d58d4f2ae23425a824de34c11e7f9 /drivers/mtd
parenta35ea8070cd1e222a7c55bc32acf2e4efe80dbbb (diff)
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driver/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 <prabhakar@freescale.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Scott Wood <scott@tyr.buserror.net>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/fsl_ifc_nand.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index 5cac78b..a518526 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -384,19 +384,30 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command,
/* READID must read all possible bytes while CEB is active */
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);
- /* 4 bytes for manuf, device and exts */
- out_be32(&ifc->ifc_nand.nand_fbcr, 4);
- ctrl->read_bytes = 4;
+ 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);
+ 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: