On 02/03/2014 01:23 AM, Lukasz Majewski wrote:
Hi Stephen,
(Sorry for the spam; resending with the correct U-Boot mailing list in CC)
On 02/01/2014 11:14 PM, Stephen Warren wrote:
Oleksandr, I'm starting to look at getting USB support enabled for the Raspberry Pi in mainline U-Boot. To that end, I looked at:
git://github.com/gonzoua/u-boot-pi.git rpi
I took the DWC driver from there and applied it to a very recent mainline U-Boot. It works very well:-)
Could you be more specific about the exact DWC USB IP block, which you plan to port for PI?
Is this host or device controller?
The USB controller designed by DesignWare is very popular (at least the USB 2.0) in the industry.
For example in u-boot there already is s3c_udc_*.c implementation for device controller. Also you can look into the s3c_hsotg.c in the linux mainline kernel.
It's a driver for the DWC2 IP block, acting as a host controller (I don't know if this one can act as a device or not).
(part of my upstreaming process will likely require s/dwc/dwc2/ everywhere, since I know there's at least a DWC3 in the kernel, and I would assume that means there could be a DWC1 somewhere too).