Hi, Genode crowd!<div><br></div><div>I&#39;ve been porting the MUSB OTG driver for the OMAP4 platform to</div><div>the Genode Framework.</div><div><br></div><div>I have implemented the following:</div><div> * some linux routines for platform devices (to manage resources)</div>
<div> * added code for some stubs in dde kit (strings, mutexes, spin locks)</div><div> * the I2C driver class for Genode and ported the OMAP4 I2C driver</div><div> * the TWL controller routines to read/write registers</div>
<div> * misc omap4 phy init (clocks and other registers)</div><div><br></div><div>This has allowed me to compile and run the musb driver and the </div><div>gadget drivers (zero, ethernet) from the linux kernel. However, I&#39;ve</div>
<div>been desperately trying to figure out why it is not working.</div><div><br></div><div>I have enabled all the levels of debugging in the usb drivers and have</div><div>dumped the MUSB FIFO in both linux and genode. The good thing is</div>
<div>that the data is not all zeroes or all ones, but correct usb requests</div><div>starting with 0x80. I think this indicates memory IO is working.</div><div><br></div><div>The bad thing is that under linux I get the correct usb requests</div>
<div>(80 06, that is, GET_DESCRIPTOR).</div><div>Under genode I either get SET_DESCRIPTOR or SET_ADDRESS all the</div><div>time and the host (desktop) says &quot;device descriptor read/64, error -32&quot;.</div><div><br></div>
<div>Does anyone have any idea what may have gone wrong? IO and register</div><div>access seems to work so I&#39;m lost here.</div><div><br></div><div>I have pushed the code to my github if you may want to try it out yourself</div>
<div>git://<a href="http://github.com/astarasikov/genode.git">github.com/astarasikov/genode.git</a></div><div>The branch is omap4-otg-dirty. I have also pushed the &#39;contrib&#39; directory</div><div>because I was lazy to prepare the patches and fight Makefiles until the driver</div>
<div>is working. My run script is called &quot;panda_otg.run&quot; (in my personal directory,</div><div>astarasikov/run).</div><div><br></div><div>I have also made the kernel message dumps in linux and genode so</div><div>
that it&#39;s possible to compare how usb behaves. I have also disabled L2 cache</div><div>in uboot since it caused a lot of trouble with framebuffer previously.</div><div><br></div><div><a href="http://pastebin.ca/2239708">http://pastebin.ca/2239708</a></div>
<div><a href="http://pastebin.ca/2239709">http://pastebin.ca/2239709</a></div><div><br></div><div>Note that I have the commented out the setting up interrupts part for the</div><div>omap4 twl. Actually, zero is returned as the default irq number which is timer.</div>
<div>I have tested with both the correct irq number and the zero interrupt, it</div><div>does not affect anything - in both cases the device does detect when the</div><div>cable is plugged, but fails to set up the connection. </div>
<div><br></div><div>-- <br>Regards, Alexander<br><br>
</div>