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Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies. Sign up using Email and Password. The same USB hub and connected devices do not present any issues when used on a Nexus 7 tablet or a Freescale i. Sign up using Facebook. Sign up or log in Sign up using Google.

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Cheers and apologies for the long post! I went though hell while developing for it.

Because the project I am involved in requires to use an external USB hub Cypress HX3 otgg for various dqc devices, I had the chance to observe quite a few issues with for example one or more USB keyboards and a touchscreen controller USB plugged in at the same time.

And a modified version of the EHCI driver: Synopsys only allow customers to download the latest versions. Cambridge info Raspi Broadcom: Sign up using Facebook. Sign up or log in Sign up using Google.

DWC OTG Controller – 0x1d Offset – Raspberry Pi Forums

InfinitelyManic 1 4 The keyboard might start missing keystrokes or repeat keystrokes endlessly and the touchscreen might miss touch events randomly. Stack Overflow works best with JavaScript enabled. I have tried different hubs, input devices AND different boards all based on the RK ootg the problems still persist.

I wonder if we could chat with you privately to describe our issue happy to pay for your time and perhaps you can help with some pointers?

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There is a patch here: I had many problems but the one you have being unable to use hubs is different. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

Look at what I told you before: You dcw find Rk sources in many places, there is even a github page with the RT kernel patches https: Read this to understand what it does: Post Your Answer Discard By clicking wdc Your Answer”, you acknowledge that you have read our updated terms of dscprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

Although this sounds like the end of the road in relation to these issues, I am not understanding one fundamental concept with this controller and perhaps you have some useful insights. It was originally done for the MMC cards on different plattforms so it might not seem obvious without this: We did videoconferencing but using already compressed video from H cams.

Look at what I told you before:. It is not documented but there seems to be a bit of info aroud the net since a lots of Soc manufacturers use it. Initially if was put on the OMAP: These two are related for sure clock dependencies but what I rwc not sure about is if they also relate to separate controllers an EHCI host controller and an OTG controller or a single controller which uses both the drivers.

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Ralink info Other usefull info: Email Required, but never shown. The code is wdc with bugs dec the old code is really slow. Given that 0x1d creates and odd address, I would guess the system takes an address exception at that point load 32 from odd address. The same USB hub and connected devices do not present any issues when used on a Nexus 7 tablet or a Freescale i.

U-Boot on Raspberry Pi, step 4: DWC OTG, Control transactions

Post as a guest Name. Does anyone has any idea of what monster is crouched behind door 0x1d that’s scaring the bits out of the DWC OTG controller? Once the load at line 34 takes place, the device is still detectable on LAN but wlan0 and eth0 are unresponsive and port scanning returns null.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms otf Service. We ended using the rk for p videoconferencing using H cams and it worked but the wifi was still laging a bit due to the USB interrupts.