[#5603] For sdio mmc on bf518f/bf548, operation on SD card takes too long time

Submitted By: Vivi Li

Open Date

2009-10-13 04:53:37 Close Date

2009-10-30 04:37:02

Priority:

Medium Assignee:

Cliff Cai

Status:

Closed Fixed In Release:

N/A

Found In Release:

2010R1 Release:

Category:

N/A Board:

N/A

Processor:

BF548 Silicon Revision:

Is this bug repeatable?:

Yes Resolution:

Fixed

Uboot version or rev.:

Toolchain version or rev.:

gcc4.1-09r1-rc9

App binary format:

N/A

Summary: For sdio mmc on bf518f/bf548, operation on SD card takes too long time

Details:

For sdio mmc on bf518f-ezbrd and bf548-ezkit, read/write/format on SD card takes much longer time. config file on bf548 is attached.

For example:

root:/> mkdosfs -F 32 /dev/mmcblk0

mkdosfs 3.0.5 (27 Jul 2009)

I used to format the same card within 10 sec, now it takes 2 min to finish.

For the logs on regression machine of bf518f-ezbrd, the last passed version of sdio mmc test is as bellow.

root:/> version

kernel: Linux release 2.6.30.5-ADI-2010R1-pre-svn7256, build #4 Wed Sep 2 00:59:56 GMT 2009

toolchain: bfin-uclinux-gcc release gcc version 4.1.2 (ADI svn)

user-dist: release svn-8797, build #39 Wed Sep 2 00:57:33 GMT 2009

The first time to find this bug is in following version.

root:/> version^M

kernel: Linux release 2.6.31-ADI-2010R1-pre-svn7385, build #44 Tue Sep 22 16:45:31 GMT 2009^M

toolchain: bfin-uclinux-gcc release gcc version 4.1.2 (ADI svn)^M

user-dist: release svn-8869, build #439 Tue Sep 22 16:43:29 GMT 2009

Follow-ups

--- Cliff Cai 2009-10-27 04:11:50

fixed now,clk_div should be the smaller one between clk_div and 0xff.

Cliff

--- Vivi Li 2009-10-30 04:37:01

OK. Close it.

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