David Brownell wrote:
On Saturday 28 August 2004 12:49 am, you wrote:
/sys/class/usb1/async is empty.
/sys/class/usb1/periodic contains:
size = 32
/sys/class/usb1/registers before the "cat" command contains:
bus pci, device 0000:00:07.4
ohci_hcd version 2004 Feb 02
OHCI 1.0, with legacy support registers
control 0x6c3 RWE RWC HCFS=suspend CBSR=3
This shouldn't be suspended here, since the individual ports
aren't suspended :
cmdstatus 0x00000 SOC=0
...
roothub.portstatus [0] 0x00000103 PPS PES CCS
roothub.portstatus [1] 0x00000103 PPS PES CCS
roothub.portstatus [2] 0x00000100 PPS
roothub.portstatus [3] 0x00000100 PPS
This suggests a chip bug to me; there were others in
AMD-756 OHCI. Does it work if you disable CONFIG_PM?
- Dave
Disabling CONFIG_PM improved things slightly, I can now do 4 or 5 "cats"
before a hang occurs. Here is the contents of
/sys/class/usb_host/usb1/registers after the hang occurs without CONFIG_PM.
homer # cat /sys/class/usb_host/usb1/registers
bus pci, device 0000:00:07.4
ohci_hcd version 2004 Feb 02
OHCI 1.0, with legacy support registers
control 0x683 RWE RWC HCFS=operational CBSR=3
cmdstatus 0x00000 SOC=0
intrstatus 0x00000020 FNO
intrenable 0x8000000e MIE RD SF WDH
ed_controlhead 1730d000
ed_controlcurrent 1730d000
ed_bulkhead 1730d0c0
donehead 1730e180
hcca frame 0xabdd
fmintvl 0xbff82edf FITFSMPS=0xaff8 FI=0x2edf
fmremaining 0x80000305 FRTFR=0x0305
periodicstart 0x2a2f
lsthresh 0x0628
roothub.a 00000204 POTPGT=0 NPS NDP=4
roothub.b 00000000 PPCM=0000 DR=0000
roothub.status 00008000 DRWE
roothub.portstatus [0] 0x00000103 PPS PES CCS
roothub.portstatus [1] 0x00000103 PPS PES CCS
roothub.portstatus [2] 0x00000100 PPS
roothub.portstatus [3] 0x00000100 PPS
Darren
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