usb_drv error -92 for RPi | Genode 18.05 with Fiasco.OC 79

[Alexander Weidinger]

Hello everyone,

when executing 'lwip' on the RPi 2, I get the following output for the
usb_drv:

> [init -> usb_drv] dev_info: DWC OTG Controller
> [init -> usb_drv] dev_info: new USB bus registered, assigned bus number 1
> [init -> usb_drv] dev_info: irq 9, io mem 0x00000000
> [init -> usb_drv] dev_info: USB hub found
> [init -> usb_drv] dev_info: 1 port detected
> [init -> usb_drv] dev_info: new high-speed USB device number 2 using dwc_otg
> [init -> usb_drv] dev_error: device descriptor read/all, error -92
> [init -> usb_drv] dev_info: new high-speed USB device number 3 using dwc_otg
> [init -> usb_drv] dev_error: device descriptor read/all, error -92
> [init -> usb_drv] dev_info: new high-speed USB device number 4 using dwc_otg
> [init -> usb_drv] dev_error: device descriptor read/8, error -92
> [init -> usb_drv] dev_error: device descriptor read/8, error -92
> [init -> usb_drv] dev_info: new high-speed USB device number 5 using dwc_otg
> [init -> usb_drv] dev_error: device descriptor read/8, error -92
> [init -> usb_drv] dev_error: device descriptor read/8, error -92
> [init -> usb_drv] dev_error: unable to enumerate USB device

Does anyone have an idea what I can do, to get the Ethernet adapter
working? Any help is appreciated!
I don't really understand the problem here, since the driver works
flawlessly for the RPi 1 B+ (using foc_rpi as platform) - which uses the
same chip as the RPi 2 (SMSC LAN9514).

My Genode version [2] and Fiasco.OC version [3].

To the backstory:
-----------------
I am currently in the process of "porting" Fiasco.OC/Genode to the
Raspberry Pi 2 (Model B).

As a basis I use Genode in the version 18.05 and Fiasco.OC in the
version 79. I created a new device, the rpi2, and based it on the
already available rpi model.

The main changes I did for the rpi2 platform [1] are
- the different arm architecture - from armv6 to armv7a in a few files
- the different physical base address - from 0x2000:0000 to 0x3f00:0000
- a RAM size of 1008 MB starting at 0x0000:0000 (1024 MB - 16 MB for
peripherals)

I use version 79 of the Fiasco.OC kernel since it adds support for the
three different BCM283X platforms. In order to get version 79 of the
kernel running with Genode, I used the official 79 as a basis and
cherry-picked commits from Genode's version of Fiasco.OC (72). [0]

My setup works completely fine for the RPi 1 (Model B+), even for the
usb/nic driver. As the RPi 1 (Model B+) makes use of the SMSC LAN9514,
instead of the SMSC LAN9512 (used in RPi Model B) it should also work
for the RPi 2 (Model B), since this SBC also uses the SMSC LAN9514.

[0] https://github.com/skalk/foc/commits/r72
[1] https://github.com/irgendwie/genode/commits/foc-rpi2
[2] https://github.com/irgendwie/genode/tree/foc-rpi2
[3] https://github.com/irgendwie/foc/tree/genode-r79-rpi2
-----------------

Best regards
Alexander
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