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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>
This commit is contained in:
Ezequiel Garcia 2013-08-12 14:14:51 -03:00 committed by David Woodhouse
parent 3a1a344a79
commit 41a634303f
1 changed files with 6 additions and 0 deletions
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6
drivers/mtd/nand/pxa3xx_nand.c
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@ -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 pxa3xx_nand_info *info, int command,
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 pxa3xx_nand_info *info, int command,
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;