Hi everyone!

I already sent this to at91support, so if someone notices the double post: this i not to annoy you, but rather to reach a broader audience and thus increase the probability of someone being able to help me :-)

We have some problems with USB, where some of our devices only work with USB sticks when I also use the ohci module in addition to the ehci module. When reading from the stick, it is also evident that ohci is used since reading is very slow.

As a first step (since it's rather urgent) I wanted to disable EHCI altogether, and use OHCI only for the moment, since the USB interface is used for SW-updates only, and I decided to choose reliablity over speed.

Anyway, when I disable EHCI support, I get the following on my Linux kernel console:

usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
at91_ohci at91_ohci: AT91 OHCI
at91_ohci at91_ohci: new USB bus registered, assigned bus number 1
at91_ohci at91_ohci: irq 22, io mem 0x00700000
at91_ohci at91_ohci: init err (00000000 0000)
ohci_hcd: can't start at91
at91_ohci at91_ohci: startup error -75
at91_ohci at91_ohci: USB bus 1 deregistered
at91_ohci: probe of at91_ohci failed with error -75

I'm using Linux 2.6.30.10 with the 2.6.30-at91.patch.gz and 2.6.30-at91-exp.2.tar.gz patches.

Any idea what's wrong here?

Any help would be appreciated!!!

Thanks,

auchi