On 01.03.2013 22:57, Daniel Mack wrote:
> Hi Afzal, everyone,
>
> On 03.11.2012 08:33, Mohammed, Afzal wrote:
>> * Daniel Mack, November 03, 2012 1:06 AM:
>>
>>> I'm testing these patches with an AM33xx board that has the first musb
>>> port wired to an USB type A plug, but it doesn't yet work for me.
>>
>>> So there is no host interface registered. I'm unsure on how to fix this,
>>> and I didn't get an answer yet to that question when I asked Felipe
>>> about how interface drivers like dsps are supposed to act in order to
>>> get host mode back after the recent musb cleanups.
>>
>>> What type of hardware do you test this with? Does host mode work for you?
>>
>> To add to those details mentioned by Ravi,
>>
>> This was tested on Beagle Bone with USB0 as usb-ethernet.
>>
>> For purely Kernel part, this series is sufficient (along with
>> dependency mentioned in cover letter), considering
>> the fact that dt node is strictly not a part of Kernel.
>>
>> To test this series, node for usbss should be present in dt.
>> Example in dt documentation can be pasted onto dtsi file
>> to get USB0 working.
>
> I have to pick up this old thread because I'm still having trouble
> understanding how the AM335x musb driver is meant to be used as HCD.
>
> I used to have it working based on 3.7 with a terrible hack that reverts
> a couple of old commits partly. Now I started over with a fresh setup
> based on Linus' current soon-to-be 3.9-rc tip, actually hoping that the
> issues are solved.
>
> On my board, the USB is purely used as host interface, with a type B
> plug soldered. In the DT, I'm using the following sniplet in accordance
> to the documentation of the bindings:
>
> usb_otg_hs: usb@47400000 {
> compatible = "ti,musb-am33xx";
> reg = <0x47400000 0x1000 /* usbss */
> 0x47401000 0x800 /* musb instance 0 */
> 0x47401800 0x800>; /* musb instance 1 */
> interrupt-parent = <&intc>;
> interrupts = <17 /* usbss */
> 18 /* musb instance 0 */
> 19>; /* musb instance 1 */
> multipoint = <1>;
> num-eps = <16>;
> ram-bits = <12>;
> port0-mode = <3>;
> port1-mode = <3>;
Btw, same happens for:
port0-mode = <1>;
Daniel
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