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Author Topic: USB and MMC woes in 3.6.4  (Read 2598 times)

wigyori

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USB and MMC woes in 3.6.4
« on: November 04, 2012, 04:09:20 PM »
Hi all,

I'm working on 3.6.x support for the board. Currently I'm based off 3.6.4, with which I have a couple issues around MMC and USB, I'm using the Koliqi patchset on github to add USB support into the DTS tree. My issues are:

 - For USB, the usb0_vbus regulator is found, but mxs_phy doesn't come up:

[    0.320000] usb0_vbus: 5000 mV
[...]
[  169.950000] mxs_phy 8007c000.usbphy: can't get the clock, err=-2
[  169.960000] mxs_phy: probe of 8007c000.usbphy failed with error -2

Also, I've seen Christian Jann (jann.cc) using the chipidea driver for USB. Shouldn't the chipidea driver be patched to be compatible with the DTS tree on fsl:imx23-usb ?

 - On the MMC side, after the mxs-mmc init a random delay is followed before finding the card, this varies from 5 sec to 180 sec. rootwait is set on the kernel cmdline so the system can be booted up, but this delay is a bit strange.

[    0.530000] Waiting for root device /dev/mmcblk0p2...
[  161.590000] mmc0: host does not support reading read-only switch. assuming w.
[  161.600000] mmc0: new SD card at address c975
[  161.610000] mmcblk0: mmc0:c975 SU02G 1.84 GiB
[  161.620000]  mmcblk0: p1 p2 p3

[    0.530000] Waiting for root device /dev/mmcblk0p2...
[  183.590000] mmc0: host does not support reading read-only switch. assuming w.
[  183.600000] mmc0: new SD card at address c975
[  183.610000] mmcblk0: mmc0:c975 SU02G 1.84 GiB
[  183.620000]  mmcblk0: p1 p2 p3

[    0.520000] Waiting for root device /dev/mmcblk0p2...
[  104.590000] mmc0: host does not support reading read-only switch. assuming w.
[  104.600000] mmc0: new SD card at address c975
[  104.610000] mmcblk0: mmc0:c975 SU02G 1.84 GiB
[  104.620000]  mmcblk0: p1 p2 p3

My DTS trees are uploaded here:

http://trabant.uid0.hu/openwrt/20121104/imx23.dtsi
http://trabant.uid0.hu/openwrt/20121104/imx23-olinuxino.dts

Thanks,
-w-

Fadil Berisha

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Re: USB and MMC woes in 3.6.4
« Reply #1 on: November 04, 2012, 08:07:57 PM »
Hi all,

I'm working on 3.6.x support for the board. Currently I'm based off 3.6.4, with which I have a couple issues around MMC and USB, I'm using the Koliqi patchset on github to add USB support into the DTS tree.

USB patches are already included on new 3.7-rc2 kernel. Follow procedure from https://github.com/koliqi/imx23-olinuxino but do not apply patches on kernel and everything will work as needed.

Regards
Fadil Berisha


dingbatca

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Re: USB and MMC woes in 3.6.4
« Reply #2 on: November 05, 2012, 04:08:32 AM »
I can vouch for the 3.7-rc3 working.  Both MMC and USB.  But I am still having GPIO problems.  Here is my current config, http://batbuilds.com/Config-linux-3.7-rc3.txt.

tcmichals

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Re: USB and MMC woes in 3.6.4
« Reply #3 on: November 05, 2012, 08:51:52 PM »
I've working with 3.7-rc3 and it works great for USB and MMC, but been struggling to get i2c working, seems like the DMA ISR is not working correctly.. (using buildroot)