Quad serial CardBus appears as 8 ports, only one useable.

[Dag Bakke <dag@bakke.com>]

Hi.
I have a 4-port CardBus device. The kernel (2.6.14-rc1) detects 8 ports:

[   75.126331] PCI: Enabling device 0000:06:00.0 (0000 -> 0003)
[   75.126375] ACPI: PCI Interrupt 0000:06:00.0[A] -> Link [LNKA] -> GSI 
11 (level, low) -> IRQ 11
[   75.128420] ttyS4: detected caps 00000700 should be 00000100
[   75.128441] ttyS4 at I/O 0x3060 (irq = 11) is a 16C950/954
[   75.131674] ttyS5: detected caps 00000700 should be 00000100
[   75.131695] ttyS5 at I/O 0x3068 (irq = 11) is a 16C950/954
[   75.135594] ttyS6: detected caps 00000700 should be 00000100
[   75.135617] ttyS6 at I/O 0x3070 (irq = 11) is a 16C950/954
[   75.145197] ttyS7: detected caps 00000700 should be 00000100
[   75.145220] ttyS7 at I/O 0x3078 (irq = 11) is a 16C950/954
[   75.218480] PCI: Enabling device 0000:06:00.1 (0000 -> 0003)
[   75.218530] ACPI: PCI Interrupt 0000:06:00.1[A] -> Link [LNKA] -> GSI 
11 (level, low) -> IRQ 11
[   75.224327] ttyS8 at I/O 0x3020 (irq = 11) is a 16450
[   75.233726] ttyS9 at I/O 0x3028 (irq = 11) is a 16450
[   75.243654] ttyS1 at I/O 0x3030 (irq = 11) is a 16450
[   75.257886] ttyS2 at I/O 0x3038 (irq = 11) is a 16450

I can't get any of the ports to work with vanilla code.


lspci -n
--------
0000:06:00.0 Class 0700: 1415:9504
0000:06:00.1 Class 0680: 1415:9511

lspci -vv
---------
0000:06:00.0 Serial controller: Oxford Semiconductor Ltd: Unknown device 
9504 (prog-if 06 [16950])
       Subsystem: Oxford Semiconductor Ltd: Unknown device 0000
       Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- 
ParErr- Stepping- SERR- FastB2B-
       Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
       Interrupt: pin A routed to IRQ 11
       Region 0: I/O ports at 3060
       Region 1: I/O ports at 3068 [size=8]
       Region 2: I/O ports at 3070 [size=8]
       Region 3: I/O ports at 3078 [size=8]
       Region 4: I/O ports at 3000 [size=32]
       Region 5: Memory at 46000000 (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-

0000:06:00.1 Bridge: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 
UART) function 1
       Subsystem: Oxford Semiconductor Ltd: Unknown device 0000
       Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- 
ParErr- Stepping- SERR- FastB2B-
       Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
       Interrupt: pin A routed to IRQ 11
       Region 0: I/O ports at 3020
       Region 1: Memory at 46001000 (32-bit, non-prefetchable) [size=4K]
       Region 2: I/O ports at 3040 [size=32]
       Region 3: Memory at 46002000 (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-


Adding the following code to 8250_pci.c:

+       {       PCI_VENDOR_ID_OXSEMI, 0x9504,
+               PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+               pbn_b0_bt_4_921600 },

allows me to use any of the 8 ports from minicom, but only if I 
physically connect the first port. I.e.:
I get data trough the first physical port, no matter what port I choose 
to use in minicom.

The card works as expected in an Alternative Operating System, using 
these drivers: http://www.oxsemi.co.uk/download/updates/up000001/v4_09.zip

Suggestions?



Dag B.
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