Mahlzeit
On Mon, Aug 18, 2003 at 09:53:26AM -0400, Alan Stern wrote:
> On Mon, 18 Aug 2003, Matthias Bruestle wrote:
> > I'm currently testing the cyberJack smart card reader under 2.6.0-t2
> > using a patched cyberJack driver (added locking) together with a UHCI
> > host controller.
> >
> > The problem is, that it works the first open/io/io/.../close sequence
> > after inserting it, but fails after the second open. This happens with
> >
> > - normal cyberJack driver using Int INs
> > - modified cyberJack driver using Bulk IN polling
> > - generic USB serial driver using Bulk IN polling
> >
> > The symptom is, that the cyberJack driver never receives any data after
> > the second open, but when looking at the USB data going over the cable
> > the device clearly sends an interrupt response with data. When looking
> > at the uhci_irq, it is called at about the time a Int IN packet should
> > come and when there is only one transfer (Int IN) in the list. But this
> > Int IN is still flagged ACTIVE, and is therefore ignored by the
> > interrupt handler.
> >
> > Are there already any patches which could help fixing this problem?
> > Or does anybody have an idea what I can try?
>
> It's curious that you see a USB interrupt transfer occur but the
> controller does not end the request. Can you post the contents of
> /proc/driver/uhci? That might have some clues.
Ok, after a success full program run:
HC status
usbcmd = 00c1 Maxp64 CF RS
usbstat = 0000
usbint = 000f
usbfrnum = (1)aec
flbaseadd = 03848aec
sof = 40
stat1 = 0095 PortEnabled PortConnected
stat2 = 0095 PortEnabled PortConnected
Frame List
Skeleton QH's
After a failed program run:
HC status
usbcmd = 00c1 Maxp64 CF RS
usbstat = 0000
usbint = 000f
usbfrnum = (0)b60
flbaseadd = 03848b60
sof = 40
stat1 = 0095 PortEnabled PortConnected
stat2 = 0095 PortEnabled PortConnected
Frame List
Skeleton QH's
Somewhere inside a program run, when waiting for the interrupt data:
HC status
usbcmd = 00c1 Maxp64 CF RS
usbstat = 0000
usbint = 000f
usbfrnum = (0)194
flbaseadd = 03848194
sof = 40
stat1 = 0095 PortEnabled PortConnected
stat2 = 0095 PortEnabled PortConnected
Frame List
Skeleton QH's
- skel_int4_qh
[c3858240] link (03858122) element (03859030)
0: [c3859030] link (00000001) e3 SPD IOC Active NAK Length=7ff MaxLen=f DT0
EndPt=1 Dev=5, PID=69(IN) (buf=05a5f520)
In the second program run, the Active for Int IN is always set when an
interrupt occures.
Mahlzeit
Matthias
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