From: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Date: Mon, 24 Mar 2014 07:41:06 +0000 (-0500)
Subject: mmc: fsl_esdhc: add controller reset in case of data related errors too
X-Git-Tag: v2014.04~8^2~9
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=8a573022c38da9ecc749acbc60556a8e8bd41996;p=oweals%2Fu-boot.git

mmc: fsl_esdhc: add controller reset in case of data related errors too

The controller reset is performed now if command error occurs.
This commit adds the reset for the case of data related errors too.

Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
---

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 58637742a4..00a454f850 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -265,6 +265,7 @@ static void check_and_invalidate_dcache_range
 static int
 esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 {
+	int	err = 0;
 	uint	xfertyp;
 	uint	irqstat;
 	struct fsl_esdhc_cfg *cfg = mmc->priv;
@@ -296,8 +297,6 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 
 	/* Set up for a data transfer if we have one */
 	if (data) {
-		int err;
-
 		err = esdhc_setup_data(mmc, data);
 		if(err)
 			return err;
@@ -325,27 +324,15 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 
 	irqstat = esdhc_read32(&regs->irqstat);
 
-	/* Reset CMD and DATA portions on error */
-	if (irqstat & (CMD_ERR | IRQSTAT_CTOE)) {
-		esdhc_write32(&regs->sysctl, esdhc_read32(&regs->sysctl) |
-			      SYSCTL_RSTC);
-		while (esdhc_read32(&regs->sysctl) & SYSCTL_RSTC)
-			;
-
-		if (data) {
-			esdhc_write32(&regs->sysctl,
-				      esdhc_read32(&regs->sysctl) |
-				      SYSCTL_RSTD);
-			while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTD))
-				;
-		}
+	if (irqstat & CMD_ERR) {
+		err = COMM_ERR;
+		goto out;
 	}
 
-	if (irqstat & CMD_ERR)
-		return COMM_ERR;
-
-	if (irqstat & IRQSTAT_CTOE)
-		return TIMEOUT;
+	if (irqstat & IRQSTAT_CTOE) {
+		err = TIMEOUT;
+		goto out;
+	}
 
 	/* Workaround for ESDHC errata ENGcm03648 */
 	if (!data && (cmd->resp_type & MMC_RSP_BUSY)) {
@@ -360,7 +347,8 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 
 		if (timeout <= 0) {
 			printf("Timeout waiting for DAT0 to go high!\n");
-			return TIMEOUT;
+			err = TIMEOUT;
+			goto out;
 		}
 	}
 
@@ -387,20 +375,41 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 		do {
 			irqstat = esdhc_read32(&regs->irqstat);
 
-			if (irqstat & IRQSTAT_DTOE)
-				return TIMEOUT;
+			if (irqstat & IRQSTAT_DTOE) {
+				err = TIMEOUT;
+				goto out;
+			}
 
-			if (irqstat & DATA_ERR)
-				return COMM_ERR;
+			if (irqstat & DATA_ERR) {
+				err = COMM_ERR;
+				goto out;
+			}
 		} while ((irqstat & DATA_COMPLETE) != DATA_COMPLETE);
 #endif
 		if (data->flags & MMC_DATA_READ)
 			check_and_invalidate_dcache_range(cmd, data);
 	}
 
+out:
+	/* Reset CMD and DATA portions on error */
+	if (err) {
+		esdhc_write32(&regs->sysctl, esdhc_read32(&regs->sysctl) |
+			      SYSCTL_RSTC);
+		while (esdhc_read32(&regs->sysctl) & SYSCTL_RSTC)
+			;
+
+		if (data) {
+			esdhc_write32(&regs->sysctl,
+				      esdhc_read32(&regs->sysctl) |
+				      SYSCTL_RSTD);
+			while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTD))
+				;
+		}
+	}
+
 	esdhc_write32(&regs->irqstat, -1);
 
-	return 0;
+	return err;
 }
 
 static void set_sysctl(struct mmc *mmc, uint clock)