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From adbba4cf6ea15c2acb53e3fd9fc03c6b37f1f1fc Mon Sep 17 00:00:00 2001
From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Date: Mon, 12 Aug 2013 14:14:51 -0300
Subject: [PATCH 118/203] mtd: nand: pxa3xx: Use 'length override' in ONFI
paramater page read
The ONFI command 'parameter page read' needs a non-standard length.
Therefore, we enable the 'length override' field in NDCB0 and set
a non-zero 'length count' in NDCB3.
Additionally, the 'spare enable' bit must be disabled for any command
that sets a non-zero 'length count' in NDCB3.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---
drivers/mtd/nand/pxa3xx_nand.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -80,6 +80,7 @@
#define NDSR_RDDREQ (0x1 << 1)
#define NDSR_WRCMDREQ (0x1)
+#define NDCB0_LEN_OVRD (0x1 << 28)
#define NDCB0_ST_ROW_EN (0x1 << 26)
#define NDCB0_AUTO_RS (0x1 << 25)
#define NDCB0_CSEL (0x1 << 24)
@@ -562,6 +563,9 @@ static int prepare_command_pool(struct p
case NAND_CMD_READOOB:
pxa3xx_set_datasize(info);
break;
+ case NAND_CMD_PARAM:
+ info->use_spare = 0;
+ break;
case NAND_CMD_SEQIN:
exec_cmd = 0;
break;
@@ -637,8 +641,10 @@ static int prepare_command_pool(struct p
info->buf_count = 256;
info->ndcb0 |= NDCB0_CMD_TYPE(0)
| NDCB0_ADDR_CYC(1)
+ | NDCB0_LEN_OVRD
| cmd;
info->ndcb1 = (column & 0xFF);
+ info->ndcb3 = 256;
info->data_size = 256;
break;
|
