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[26/29] pxa3xx_nand: fix reset timeout on mmp2

Message ID AANLkTimaAgchnRfCGse9tSNpA34eDbHTvvrC1VBs+M-L@mail.gmail.com
State New, archived
Headers show

Commit Message

Haojian Zhuang July 28, 2010, 5:58 a.m. UTC 
From 04908f81f6132f73f5cdc2735dc887dd82951142 Mon Sep 17 00:00:00 2001
From: Lei Wen <leiwen@marvell.com>
Date: Tue, 22 Jun 2010 23:14:21 +0800
Subject: [PATCH 26/29] pxa3xx_nand: fix reset timeout on mmp2

For mmp2 board, reset command would always have timeout when enable
the IRQ processing. The command done would comes after exit the IRQ
processing whatever the timeout value is set.

Change reset command use polling mode fix the issue.

Signed-off-by: Lei Wen <leiwen@marvell.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
---
 drivers/mtd/nand/pxa3xx_nand.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

 				| cmd;
@@ -945,7 +949,7 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info
*mtd, unsigned command,
 {
 	struct pxa3xx_nand_info *info = mtd->priv;
 	struct pxa3xx_nand *nand = info->nand_data;
-	int ret, exec_cmd;
+	int ret, exec_cmd, polling_mode;

 	/* if this is a x16 device ,then convert the input
 	 * "byte" address into a "word" address appropriate
@@ -961,6 +965,7 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info
*mtd, unsigned command,
 		nand_writel(nand, NDTR1CS0, info->ndtr1cs0);
 	}

+	polling_mode = use_polling;
 	exec_cmd = prepare_command_pool(nand, command, column, page_addr);
 	if (exec_cmd) {
 		init_completion(&nand->cmd_complete);
@@ -980,6 +985,7 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info
*mtd, unsigned command,
 		}
 		nand->state &= ~STATE_CMD_PREPARED;
 	}
+	use_polling = polling_mode;
 }

 static uint8_t pxa3xx_nand_read_byte(struct mtd_info *mtd)
diff mbox

Patch

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index ba15baf..cad97df 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -920,6 +920,10 @@  static int prepare_command_pool(struct
pxa3xx_nand *nand, int command,

 		break;
 	case NAND_CMD_RESET:
+		/* on some platform, it is stranger that when issue reset command,
+		 * cmd done would not come till timeout cause irq exit.
+		 * Force polling mode for reset command*/
+		use_polling = 1;
 		cmd = info->cmdset->reset;
 		nand->ndcb0[0] |= NDCB0_CMD_TYPE(5)