[meta-xilinx] Is qspi-nor flash broken in meta-xilinx layer for zcu102-zynqmp?

[Martin Lund]

Yeah, I see a lot of good stuff coming from you and Holden Sandlar trying to fix/patch the qspi-nor driver but as you state Xilinx seems to pay little attention to this driver. I've also applied your patches.


Surprisingly, we have just discovered that if we lower the spi-max-frequency from 108 MHz (default in .dts) to e.g. 50 MHz our read/write problem goes away?


It seems the prebuilt xilinx petalinux images run successfully at 108 MHz so it makes me wonder exactly what they are doing differently.


Also, running up UBI/UBIFS on the qspi-nor flash with the "has-io-mode" flag and at 50 MHz it seems to work fine except when we run ubi-tests ("runubitests.sh /dev/ubi0") from mtd-utils we see it crashing when running the *_paral tests which are sort of stress tests.





________________________________
From: meta-xilinx-bounces at yoctoproject.org <meta-xilinx-bounces at yoctoproject.org> on behalf of Mike Looijmans <mike.looijmans at topic.nl>
Sent: Sunday, April 29, 2018 5:31:38 PM
To: meta-xilinx at yoctoproject.org
Subject: Re: [meta-xilinx] Is qspi-nor flash broken in meta-xilinx layer for zcu102-zynqmp?

There were quite a few bugs in the QSPI support last year, I've sent
patches to fix the ones I found on the 'regular' Zynq to Xilinx. Since
the ZynqMP has a different controller than the Zynq, there may some
similar leftover bugs in there as well.

The QSPI driver still has not been submitted into Linux mainline, which
indicates the poor attention the driver has been receiving.

Side note: There's no point running both flash_erase and flashcp. The
flashcp command will also erase before writing (otherwise, you wouln't
need the command...). Either use flashcp, or use flash_erase followed by dd.

On 25-04-18 09:04, Martin Lund wrote:
> Hi,
>
> Is the qspi-nor flash feature broken in the meta-xilinx layer for zcu102-zynqmp ?
>
> We've been trying to test and verify the qspi-nor flash feature on a ZynqMP zcu102 rev 1.0 development board only to find out that basic reading/writing to the qspi-nor flash is failing.
>
> We are building and testing with core-image-minimal on latest rocko branch (commit 7935ef724c, stock/clean meta-xilinx, no petalinux) with the following patch/fix added to avoid the zynqmp_clk_get_periphial_rate error which prevents the u-boot SPL from booting:
> https://lists.yoctoproject.org/pipermail/meta-xilinx/2017-December/003464.html
>
> This is how we test and see the qspi-flash fail:
>
> root at zcu102-zynqmp:~# cat /proc/mtd
> dev:    size   erasesize  name
> mtd0: 00100000 00002000 "qspi-fsbl-uboot"
> mtd1: 00500000 00002000 "qspi-linux"
> mtd2: 00020000 00002000 "qspi-device-tree"
> mtd3: 005e0000 00002000 "qspi-rootfs"
>
> root at zcu102-zynqmp:~# flash_erase /dev/mtd3 0 0
> Erasing 8 Kibyte @ 2000 --  0 % complete [  103.966880] random: crng init done
> Erasing 8 Kibyte @ 5de000 -- 100 % complete
>
> root at zcu102-zynqmp:~# dd if=/dev/urandom of=./sample.bin bs=1024 count=4096
> 4096+0 records in
> 4096+0 records out
>
> root at zcu102-zynqmp:~# flashcp -v ./sample.bin /dev/mtd3
> Erasing blocks: 512/512 (100%)
> Writing data: 4096k/4096k (100%)
> Verifying data: 10k/4096k (0%)File does not seem to match flash data. First mismatch at 0x00000000-0x00002800
>
> Any ideas what might be wrong in the meta-xilinx layer that would make the qpsi-nor flash fail like that?
>
> Thanks.
>
> /Martin
>


--
Mike Looijmans


Kind regards,

Mike Looijmans
System Expert

TOPIC Products
Materiaalweg 4, NL-5681 RJ Best
Postbus 440, NL-5680 AK Best
Telefoon: +31 (0) 499 33 69 79
E-mail: mike.looijmans at topicproducts.com
Website: www.topicproducts.com<http://www.topicproducts.com>

Please consider the environment before printing this e-mail



--
_______________________________________________
meta-xilinx mailing list
meta-xilinx at yoctoproject.org
https://lists.yoctoproject.org/listinfo/meta-xilinx
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.yoctoproject.org/pipermail/meta-xilinx/attachments/20180430/0101a9eb/attachment.html>