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u-boot 2011.12: OMAP MMC: Add delay before waiting for status

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Pending upstream patch from http://patchwork.ozlabs.org/patch/132795/ is
required to successfully boot on xM.

Signed-off-by: Peter A. Bigot <bigotp@acm.org>
Acked-by: Tom Rini <tom.rini@gmail.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
This commit is contained in:
Peter A. Bigot
2011-12-29 05:27:38 -06:00
committed by Koen Kooi
parent 97dc8eee97
commit 845be4c1d3
2 changed files with 47 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
recipes-bsp/u-boot/u-boot/2011.12/U-Boot-OMAP-MMC-Add-delay-before-waiting-for-status.patch
+45
View File
@@ -0,0 +1,45 @@
From patchwork Thu Dec 22 09:56:35 2011
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Subject: [U-Boot] OMAP MMC: Add delay before waiting for status
Date: Wed, 21 Dec 2011 23:56:35 -0000
From: =?utf-8?q?Andreas_M=C3=BCller_=3Cschnitzeltony=40gmx=2Ede=3E?=
X-Patchwork-Id: 132795
Message-Id: <1324547795-19678-1-git-send-email-schnitzeltony@gmx.de>
To: u-boot@lists.denx.de
Loading kernel from MMC created the following error message reproducable:
| reading uImage
| mmc_send_cmd: timedout waiting for stat!
|
| 2860468 bytes read
Tested on overo with OMAP3530:
* OMAP3530-GP ES3.1, CPU-OPP2, L3-165MHz, Max CPU Clock 720 mHz
Die ID #470e000400000000040398d31402100c
* OMAP3530-GP ES3.1, CPU-OPP2, L3-165MHz, Max CPU Clock 600 mHz
Die ID #112000040000000004035c140101b011
Signed-off-by: Andreas Müller <schnitzeltony@gmx.de>
---
drivers/mmc/omap_hsmmc.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c
index c38b9e6..ac91e5d 100644
--- a/drivers/mmc/omap_hsmmc.c
+++ b/drivers/mmc/omap_hsmmc.c
@@ -197,6 +197,10 @@ static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
unsigned int flags, mmc_stat;
ulong start;
+ /* Delay added before checking the status */
+ if (cmd->cmdidx == MMC_CMD_SEND_STATUS)
+ udelay(1); /* wait 1 us */
+
start = get_timer(0);
while ((readl(&mmc_base->pstate) & DATI_MASK) == DATI_CMDDIS) {
if (get_timer(0) - start > MAX_RETRY_MS) {
recipes-bsp/u-boot/u-boot_2011.12.bb
+2 -1
View File
@@ -6,7 +6,7 @@ UBOOT_IMAGE = "u-boot-${MACHINE}-${PV}-${PR}.img"
UBOOT_SYMLINK = "u-boot-${MACHINE}.img"
PV = "2011.12"
PR = "r0"
PR = "r1"
# No patches for other machines yet
COMPATIBLE_MACHINE = "(beagleboard|pandaboard|hawkboard|am3517-evm|am37x-evm|omap3evm)"
@@ -17,6 +17,7 @@ SRC_URI = "git://www.denx.de/git/u-boot.git;protocol=git \
file://2011.12/0003-beagleboard-add-support-for-scanning-loop-through-ex.patch \
file://2011.12/0004-omap4-common-mount-root-RO.patch \
file://2011.12/0005-omap4-common-use-ext4-by-default.patch \
file://2011.12/U-Boot-OMAP-MMC-Add-delay-before-waiting-for-status.patch \
"
# v2011.12 tag