+Stephen
On 26 November 2015 at 03:25, Hans de Goede hdegoede@redhat.com wrote:
Hi,
On 26-11-15 01:38, Stefan Bruens wrote:
On Wednesday 25 November 2015 16:55:54 Sumeet Jauhar wrote:
Hello All,
I am new to Rpi and for a project I need to install Uboot for Rpi. For starters I installed Raspbian-jessie to the pi and it worked fine. Now I am attempting to use uboot but I don't succeed. I am trying to follow the instructions http://elinux.org/RPi_U-Boot and http://arrizza.org/wiki/index.php/RPI_U-boot . Here is what i have done so far.
There seems to be a problem with the RPi and USB Low-speed and Full-speed devices. The following did work (480Mbps capable):
- several USB memory sticks
- USB 3.0/2.0 SDHC card reader
- RTL2832u based DVB-T stick
- Haupage PCTV 290e DVB-T2 stick
Following did not work:
- several mice/keyboards (12Mbps/1.5Mbps)
- several USB/serial adapters
- PL2303 (12Mbps)
- Cypress CYC765211 (12Mbps)
- USB audio noname device (12Mbps)
Hmm, I'm not familiar with the rpi usb controller, but AFAIK the rpi uses an onboard usb-2 hub, when talking to usb-1 devices attached to a usb-2 hub you must address the tt in the first usb-2 hub upstream of the usb-1 device. See e.g.:
http://git.denx.de/?p=u-boot.git;a=commitdiff;h=4e2c4ad3604ba6f5053090749d64... http://git.denx.de/?p=u-boot.git;a=commitdiff;h=fcdd8aaa48dfcac492cbac5436d9...
And also, for a controller which AFAICT is closer to the rpi usb controller:
http://git.denx.de/?p=u-boot.git;a=commitdiff;h=e740ca3cab93a8cb31d870bffecd...
Note that the last 2 commits both do a bunch of magic to translate from usb_device pointers to dm device pointers and back, not sure if the rpi usb controller code has been converted to dm yet, but if it has that is a likely culprit.
I hope this helps.
Regards,
Hans
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