Re: Pxa270 - Enabling USB Host port 2

Girish wrote:
> Dear All,
>     I am working on PXA270 board. We have 2 usb ports enabled on that. 
> By default port1 is connected to dedicated differential ports.
> For Host port 2 there are 2 options
> 1.Differntial Mode: Can be Connected to differential port. The pin 
> USBC_P and the pin USBC_N output USBH_N<2> and USBH_P<2> signals
> can be set by UP2OCR[HXOE]=1 and UP2OCR[HXS]= 1.
> 2.Single Ended Mode: Connection via external USB tranceiver.
>
> I used the first configuration mode to enable Host Port 2. For that I 
> have enabled DPPDE,DMPDE,HXOE and HXS in UP2OCR register. But
> When I connected the Full speed device(3Com wifi) It reports that low 
> speed device is connected and emmits read error messages as shown below. 
> When low speed device
> is connected it reports Full speed device is connected and emmits read 
> error messages. I only modified UP2OCR register, So is there any flags 
> to be set in the Host Controll register. Please Clarify.
>
>   
 Dear all,
        After lot of struggle Port 2 in Non-OTG Host mode works fine 
now. Previously D+ & D-  were interchanged (hardware problem). So Host 
was unable to detect the device's speed. Now it works fine.
But another problem raised:-
When Power sense polarity is Active_low i.e.
      UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) & ~(UHCHR_SSEP1 | 
UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE);
Port 2 works fine but Host port 1 doesn't works (even though D+ signal 
is high(3v)).
When Power Sense Polarity is Active_High i.e
    UHCHR &= ~(UHCHR_PCPL | UHCHR_PSPL) & ~(UHCHR_SSEP1 | UHCHR_SSEP2 | 
UHCHR_SSEP3 | UHCHR_SSE);
Port 1 Works fine but Port 2 doesn't works (even though D+ signal is 
high when high speed device is connected).
We tried all hardware combination but didn't succeed. Can any body show 
me light on this issue.


Thanks in advance
Girish



-- 

----------------------------------------------------------------------
Girish A J ([email protected]) 
Associate - Systems,		     Ph: (80) 2361 8184-86   Ext 135
PicoPeta Simputers Pvt Ltd.        (A subsidiary of Geodesic Information Systems Ltd)
146 5th Cross, RMV Extension,		Fax:(80) 2361 7568
Bangalore - 560 080.
URL  http://www.picopeta.com
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