On 07/08/2010 10:23 AM, Marek Szyprowski wrote:
Hello,
On Tuesday, July 06, 2010 7:03 PM Darius Augulis wrote:
On 06/28/2010 09:01 AM, Marek Szyprowski wrote:
Hello,
On Friday, June 25, 2010 12:56 PM Darius Augulis wrote:
On 06/22/2010 04:16 PM, Yauhen Kharuzhy wrote:
This patch series fixes SDHCI on S3C2416. I got SD card working with
this
patches
and with patches for GPIO card detection support by Marek Szyprowski.
Unfortunately I did not get SD card working with these patches. I'm
using custom board, not SMDK2416, but SD slot connection and schematics
are the same like in SMDK2416. I've tried to debug a bit this problem
and this is what I got: kernel do detection of card insert/remove,
driver prints messages:
s3c-sdhci s3c-sdhci.1: card inserted.
s3c-sdhci s3c-sdhci.1: card removed.
Then I put some printk in s3c-sdhci driver and MMC core and found that
mmc_rescan() is called only once at startup and no more when
inserting/removing SD card. Also mmc_rescan() stops at that point where
mmc_power_up() is called and does not return. And mmc_power_up() stops
where mmc_delay(10) is called and does not return too.
Every time when inserting/removing SD card only functions
sdhci_tasklet_card() and mmc_detect_change() are called, and nothing
happens. Kernel doesn't detect the card inserted.
Maybe this info could help to debug where the problem is - in my custom
board or in your patches?
Have you tried with polled card detection method (SDHCI_CD_NONE)? If it
doesn't work I suspect something with the hardware. Checking with mmc
debug
enabled might also help figuring this issue out.
yes, I've tried that, but didn't get sd card working. I got schematics
from China manufacturer, SD card connection is the same like in
smdk2416. with mmc debug enabled I found that SD card is detected when
inserted or removed, but after detection card initialisation is not
performed.
Does it work without my patches or with other Linux kernel? You can try to
check the custom Linux 2.6.29 from
git://git.kernel.org/pub/scm/linux/kernel/git/kki_ap/linux-2.6-samsung.git
I did try with and without your patches. First, I applied only s3c2416
realated patches from Yauhen, then I've added your patches, but nothing
changed.
I would like to know whether my patches cause the problem or there is some
kind of hardware issue with your board.
Best regards
--
Marek Szyprowski
Samsung Poland R&D Center
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