This patch adds random output enable command support in IFC nand
controller driver. This command implements change read
column (05h-E0h).
Signed-off-by: Ronak Desai <ronak.de...@rockwellcollins.com>
Signed-off-by: Matthew Weber <matthew.we...@rockwellcollins.com>
---
drivers/mtd/nand/fsl_ifc_nand.c | 30 +++++++++++++++++++++++++++---
1 file changed, 27 insertions(+), 3 deletions(-)
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index 7001cbd..b4e05c6 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -460,10 +460,11 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd,
unsigned int command,
/*
* although currently it's 8 bytes for READID, we always read
- * the maximum 256 bytes(for PARAM)
+ * the maximum 8192 bytes(for PARAM) supported by IFC controller
+ * as extended page may be available for some NAND devices.
*/
- ifc_out32(&ifc->ifc_nand.nand_fbcr, 256);
- ctrl->read_bytes = 256;
+ ifc_out32(&ifc->ifc_nand.nand_fbcr, 0); /* Read whole page */
+ ctrl->read_bytes = 8192; /* Maximum supported page by IFC */
set_addr(mtd, 0, 0, 0);
fsl_ifc_run_command(mtd);
@@ -596,6 +597,29 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned
int command,
fsl_ifc_run_command(mtd);
return;
+ case NAND_CMD_RNDOUT: {
+ __le16 Tccs = 0;
+ chip->onfi_version ? (Tccs = chip->onfi_params.t_ccs)
+ : (Tccs = chip->jedec_params.t_ccs);
+ ifc_out32(&ifc->ifc_nand.nand_fcr0,
+ (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) |
+ (IFC_FIR_OP_CA0 << IFC_NAND_FIR0_OP1_SHIFT) |
+ (IFC_FIR_OP_CMD1 << IFC_NAND_FIR0_OP2_SHIFT) |
+ (IFC_FIR_OP_NWAIT << IFC_NAND_FIR0_OP3_SHIFT));
+
+ ifc_out32(&ifc->ifc_nand.nand_fcr0,
+ (NAND_CMD_RNDOUT << IFC_NAND_FCR0_CMD0_SHIFT) |
+ (NAND_CMD_RNDOUTSTART <<
IFC_NAND_FCR0_CMD1_SHIFT));
+
+ /* Wait for minimum change column set-up time. But it does not
harm
+ * to wait more time, so calculated based on 333.3 MHz input
IFC clock
+ */
+ ifc_out32(&ifc->ifc_nand.ncfgr, (0xFF & (le16_to_cpu(Tccs)/3)));
+ set_addr(mtd, column, 0, 0);
+ fsl_ifc_run_command(mtd);
+ return;
+ }
+
default:
printf("%s: error, unsupported command 0x%x.\n",
__func__, command);
--
1.9.1
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