Hi,
Hans de Goede wrote:
Hi,
On 30-08-15 10:30, Yousong Zhou wrote:
Hi
In an OpenWrt ticket [1] I reported two issues encountered by 2 SD
cards of mine.
One of them failed with `error reading clusters` when reading a uImage
file of size about 2MB. This issue happened after we switch from DMA
transfer to `mmc_trans_data_by_cpu()`. It is caused by fixed 2
seconds timeout without considering the transfer size. A fixed was
just posted [2] in OpenWrt-devel list.
The other card failed at the SPL stage with `spl: mmc init failed with
error: -19`. That -19 is defined as macro TIMEOUT in U-Boot and it is
comparable to -110 in Linux kernel defined as ETIMEOUT. This problem
happened after we switch the clock divider from the
controller-internal one to mod0-clock (commit fc3a832 "sunxi: mmc:
Properly setup mod-clk and clock sampling phases"). Actually TIMEOUT
is not the root cause here. It is caused by
SUNXI_MMC_RINT_RESP_CRC_ERROR when trying to switch the card to
highspeed mode. Unfortunately I am not familiar with sunxi clock
system enough to provide a fix for this.
More details can be found in the ticket description in link [1]
[1] https://dev.openwrt.org/ticket/20387
[2] http://patchwork.ozlabs.org/patch/512163/
Thanks for the patch I've merged it into my sunxi u-boot tree,
and send a pullreq for merging it into u-boot master.
As for the other issue I've no idea what is going on there.
Hans, I take this as an ack from You. :) Yousong, I'll boot-test this
patch on a couple boards I have, and then push into openwrt trunk.
Thanks,
Zoltan H
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