From: Roman Tereshonkov <roman.tereshonkov@nokia.com>
Date: Wed, 3 Nov 2010 10:55:20 +0000 (+0200)
Subject: mtd: onenand: fix omap2 code to handle cache program feature
X-Git-Tag: v2.6.38-rc1~21^2~48
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d19d7b46d2b4936be14cfeef779ffeb76cf7b757;p=platform%2Fkernel%2Flinux-exynos.git

mtd: onenand: fix omap2 code to handle cache program feature

Some fixes are introduced into omap2 code to handle errors when
cache program feature is used.

Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
index 9f322f1..da25a90 100644
--- a/drivers/mtd/onenand/omap2.c
+++ b/drivers/mtd/onenand/omap2.c
@@ -108,8 +108,9 @@ static void wait_warn(char *msg, int state, unsigned int ctrl,
 static int omap2_onenand_wait(struct mtd_info *mtd, int state)
 {
 	struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
+	struct onenand_chip *this = mtd->priv;
 	unsigned int intr = 0;
-	unsigned int ctrl;
+	unsigned int ctrl, ctrl_mask;
 	unsigned long timeout;
 	u32 syscfg;
 
@@ -180,7 +181,8 @@ retry:
 			if (result == 0) {
 				/* Timeout after 20ms */
 				ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
-				if (ctrl & ONENAND_CTRL_ONGO) {
+				if (ctrl & ONENAND_CTRL_ONGO &&
+				    !this->ongoing) {
 					/*
 					 * The operation seems to be still going
 					 * so give it some more time.
@@ -269,7 +271,11 @@ retry:
 		return -EIO;
 	}
 
-	if (ctrl & 0xFE9F)
+	ctrl_mask = 0xFE9F;
+	if (this->ongoing)
+		ctrl_mask &= ~0x8000;
+
+	if (ctrl & ctrl_mask)
 		wait_warn("unexpected controller status", state, ctrl, intr);
 
 	return 0;