USB ohci vs ehci

[Jim Ramsay <jim.ramsay@gmail.com>]

I have an NEC-based 'UP215-N101' USB 2.0 PCI card which can apparently
appear as a device under ohci-hcd or ehci-hcd, depending on which one
is loaded.  If both modules are loaded, the device doesn't seem to
work, as it is detected by both

I would just load the ehci-hcd device, except that the on-board USB is
only detected by ohci-hcd.

Is there some way to make ohci-hcd ignore a specific PCI device or
devices?  Or is there a way ehci-hcd can tell ohci-hcd to 'forget'
about a particular device if it exists in ehci-hcd as well?

Output of `dmesg` after loading ohci-hcd.  The card in question is at
pci 0000:00:10

ohci_hcd 0000:00:01.3: PCI device 1283:1234 (Integrated Technology Express, Inc.
)
ohci_hcd 0000:00:01.3: irq 35, pci mem 0xd020000
ohci_hcd 0000:00:01.3: new USB bus registered, assigned bus number 1
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
ohci_hcd 0000:00:10.0: NEC Corporation USB
ohci_hcd 0000:00:10.0: irq 40, pci mem 0xd021000
ohci_hcd 0000:00:10.0: new USB bus registered, assigned bus number 2
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 3 ports detected
ohci_hcd 0000:00:10.1: NEC Corporation USB (#2)
ohci_hcd 0000:00:10.1: irq 40, pci mem 0xd022000
ohci_hcd 0000:00:10.1: new USB bus registered, assigned bus number 3
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected

Output of `dmesg` after loading ehci-hcd:

ehci_hcd 0000:00:10.2: NEC Corporation USB 2.0
ehci_hcd 0000:00:10.2: irq 40, pci mem 0xd024000
ehci_hcd 0000:00:10.2: new USB bus registered, assigned bus number 4
ehci_hcd 0000:00:10.2: park 0
ehci_hcd 0000:00:10.2: USB 2.0 initialized, EHCI 1.00, driver 10 Dec 2004
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 5 ports detected

Output of `lspci -vv -s 10`:

00:10.0 Class 0c03: 1033:0035 (rev 43) (prog-if 10)
        Subsystem: 3083:0035
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Step
ping- SERR+ FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort
- <MAbort- >SERR- <PERR-
        Latency: 252 (250ns min, 10500ns max), cache line size 08
        Interrupt: pin A routed to IRQ 40
        Region 0: Memory at 0d021000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [40] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot
+,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:10.1 Class 0c03: 1033:0035 (rev 43) (prog-if 10)
        Subsystem: 3083:0035
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Step
ping- SERR+ FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort
- <MAbort- >SERR- <PERR-
        Latency: 252 (250ns min, 10500ns max), cache line size 08
        Interrupt: pin B routed to IRQ 40
        Region 0: Memory at 0d022000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [40] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot
+,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:10.2 Class 0c03: 1033:00e0 (rev 04) (prog-if 20)
        Subsystem: 3083:00e0
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Step
ping- SERR+ FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort
- <MAbort- >SERR- <PERR-
        Latency: 252 (4000ns min, 8500ns max), cache line size 08
        Interrupt: pin C routed to IRQ 40
        Region 0: Memory at 0d024000 (32-bit, non-prefetchable) [size=256]
        Capabilities: [40] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot
+,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

-- 
Jim Ramsay
"Me fail English?  That's unpossible!"