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Commit 41a63430 authored by Ezequiel Garcia's avatar Ezequiel Garcia Committed by David Woodhouse
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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: default avatarEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: default avatarDaniel Mack <zonque@gmail.com>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 3a1a344a

drivers/mtd/nand/pxa3xx_nand.c

+6 −0
Original line number Diff line number Diff line
@@ -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;