What is the current USB support status on DB1550?

What is the current USB support status on DB1550?

[rolf liu]

Are both usb host and usb gadget support as well? And the On the Go feature?

Thanks 

rolf

Re: What is the current USB support status on DB1550?

[Pete Popov]

On Thu, 2005-07-14 at 08:32 -0700, rolf liu wrote:
> Are both usb host and usb gadget support as well? And the On the Go feature?

Host only. We couldn't make gadget work due to interrupt latency
requirements by the HW that couldn't be reliably achieved with Linux.
But gadget does work on the Au1200.

Pete

Re: What is the current USB support status on DB1550?

[rolf liu]

Is there big difference between Au1200 and Au1550? Any constrant on Au1550 ?
Thanks


On 7/14/05, Pete Popov <ppopov@embeddedalley.com> wrote:
> On Thu, 2005-07-14 at 08:32 -0700, rolf liu wrote:
> > Are both usb host and usb gadget support as well? And the On the Go feature?
> 
> Host only. We couldn't make gadget work due to interrupt latency
> requirements by the HW that couldn't be reliably achieved with Linux.
> But gadget does work on the Au1200.
> 
> Pete
> 
> 
>

Re: What is the current USB support status on DB1550?

[Pete Popov]

On Thu, 2005-07-14 at 09:04 -0700, rolf liu wrote:
> Is there big difference between Au1200 and Au1550? 

Sure. Take a look at the marketing pdfs from AMD, they provide a concise
description.

Pete

> Any constrant on Au1550 ?
> Thanks
> 
> 
> On 7/14/05, Pete Popov <ppopov@embeddedalley.com> wrote:
> > On Thu, 2005-07-14 at 08:32 -0700, rolf liu wrote:
> > > Are both usb host and usb gadget support as well? And the On the Go feature?
> > 
> > Host only. We couldn't make gadget work due to interrupt latency
> > requirements by the HW that couldn't be reliably achieved with Linux.
> > But gadget does work on the Au1200.
> > 
> > Pete
> > 
> > 
> >
> 

Re: What is the current USB support status on DB1550?

[Kevin Turner]

On Thu, 2005-07-14 at 08:49 -0700, Pete Popov wrote:
> Host only. We couldn't make gadget work due to interrupt latency
> requirements by the HW that couldn't be reliably achieved with Linux.
> But gadget does work on the Au1200.

Is the Au1500 in the same boat as the DB1550?  Do the hardware
requirements apply to all boards with that SOC, or is it somewhat
board-dependent?

Thanks,

 - Kevin

-- 
The moon is first quarter, 49.5% illuminated, 7.3 days old.

Re: What is the current USB support status on DB1550?

[Pete Popov]

On Thu, 2005-07-14 at 13:49 -0700, Kevin Turner wrote:
> On Thu, 2005-07-14 at 08:49 -0700, Pete Popov wrote:
> > Host only. We couldn't make gadget work due to interrupt latency
> > requirements by the HW that couldn't be reliably achieved with Linux.
> > But gadget does work on the Au1200.
> 
> Is the Au1500 in the same boat as the DB1550? 

The Db1550 is the reference board for the Au1550.

>  Do the hardware
> requirements apply to all boards with that SOC, or is it somewhat
> board-dependent?

All boards with the 1100, 1500, or 1550. The Au1200 gadget works, but
the usb controller on the SOC is different. We've made the other CPUs
work before but it was on top of RTLinux, different/proprietary usb
stack, and a lot of debug and tuning.

Pete

Re: What is the current USB support status on DB1550?

[rolf liu]

The drive is identified in the file "devices".
Pete,
I can't get my netac flash drive working on db1550. Could you tell me
what went wrong?

I mount the usbfs as "mount none /proc/bus/usb  -t usbfs".
In /proc/bus/usb, I don't see "drivers", only "001" and "devices".

Under /proc/scsc/usb-storage, there is file "0", which gives the
information for this drive:
Host scsi0: usb-storage
Vendor: Netac
Product: OnlyDisk
Serial number: None
Protocol: Transparent SCSI
Transport: Bulk

The output from usb-storage debug keeps showing
"Bad target number", since the device->id is not 0 and the flags is 0.
Any suggestion on this part? 

...
Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0,  type 0
usb-storage: queuecommand called
usb-storage: *** thread awakened.
usb-storage: Bad target number (1:0)
usb-storage: scsi cmd done, result=0x40000
usb-storage: *** thread sleeping.
usb-storage: queuecommand called
usb-storage: *** thread awakened.
usb-storage: Bad target number (2:0)
usb-storage: scsi cmd done, result=0x40000
...

Thanks


On 7/14/05, Pete Popov <ppopov@embeddedalley.com> wrote:
> On Thu, 2005-07-14 at 13:49 -0700, Kevin Turner wrote:
> > On Thu, 2005-07-14 at 08:49 -0700, Pete Popov wrote:
> > > Host only. We couldn't make gadget work due to interrupt latency
> > > requirements by the HW that couldn't be reliably achieved with Linux.
> > > But gadget does work on the Au1200.
> >
> > Is the Au1500 in the same boat as the DB1550?
> 
> The Db1550 is the reference board for the Au1550.
> 
> >  Do the hardware
> > requirements apply to all boards with that SOC, or is it somewhat
> > board-dependent?
> 
> All boards with the 1100, 1500, or 1550. The Au1200 gadget works, but
> the usb controller on the SOC is different. We've made the other CPUs
> work before but it was on top of RTLinux, different/proprietary usb
> stack, and a lot of debug and tuning.
> 
> Pete
> 
> 
>