Hi.
There was a discussion regarding support of OXCB950 in 2.4.x
http://groups.google.com/group/mlist.linux.serial/browse_frm/thread/baf6d48e25662c5/8ab3b1ea12a43420?tvc=1&q=OXCB950#8ab3b1ea12a43420
Somehow changes did not go into the kernel.
Now detailed data sheet is freely available at
http://www.oxsemi.com/oxford/documents/download/standard/dsheets/oxcb950ds.pdf
I own ST Lab RS232 serial port, model C-130. It is a CardBus Type II,
32-bit, 3.3V. After looking into that old discussion I've made the same
changes for 2.6.16 kernel:
diff -ru linux-2.6.16-orig/drivers/serial/8250_pci.c
linux-2.6.16/drivers/serial/8250_pci.c
--- linux-2.6.16-orig/drivers/serial/8250_pci.c 2006-03-23 13:32:17.000000000
+0200
+++ linux-2.6.16/drivers/serial/8250_pci.c 2006-03-23 13:39:08.000000000
+0200
@@ -2045,6 +2045,9 @@
{ PCI_VENDOR_ID_OXSEMI, 0x950a,
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b0_2_1130000 },
+ { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_CB950,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_b0_bt_1_115200 },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954,
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b0_4_115200 },
diff -ru linux-2.6.16-orig/include/linux/pci_ids.h
linux-2.6.16/include/linux/pci_ids.h
--- linux-2.6.16-orig/include/linux/pci_ids.h 2006-03-23 13:32:24.000000000
+0200
+++ linux-2.6.16/include/linux/pci_ids.h 2006-03-23 13:40:32.000000000
+0200
@@ -1808,6 +1808,7 @@
#define PCI_VENDOR_ID_OXSEMI 0x1415
#define PCI_DEVICE_ID_OXSEMI_12PCI840 0x8403
#define PCI_DEVICE_ID_OXSEMI_16PCI954 0x9501
+#define PCI_DEVICE_ID_OXSEMI_CB950 0x950B /* OXCB950 Cardbus 16950 UART */
#define PCI_DEVICE_ID_OXSEMI_16PCI95N 0x9511
#define PCI_DEVICE_ID_OXSEMI_16PCI954PP 0x9513
#define PCI_DEVICE_ID_OXSEMI_16PCI952 0x9521
Is it enough for such card to work?
(Unfortunately, I do not have enough experience to implement complex
kernel things)
After applying the patch driver recognizes the card:
pccard: CardBus card inserted into slot 0
PCI: Enabling device 0000:07:00.0 (0000 -> 0003)
ACPI: PCI Interrupt 0000:07:00.0[A] -> Link [LNKA] -> GSI 11 (level,low) -> IRQ
11
ttyS4: detected caps 00000700 should be 00000100
0000:07:00.0: ttyS4 at I/O 0x3010 (irq = 11) is a 16C950/954
The problem is that card only works with baud rates from 50 to 2400.
The card is connected to a common external modem, which is known to
work with any reasonable rates in other PC.
C-Kermit>set line /dev/ttyS4
C-Kermit>set carrier-watch off
C-Kermit>set speed 2400
C-Kermit>connect
works... but setting any higher rate results in non responding modem.
I've also tried connecting the card to devices with fixed serial
parameters: 9600 8N1. No response too.
Using wvdial with ANY Baud from 300 to 2400 results in:
"CONNECT 230400/V34/LAPM/V42B/TX=28800/RX=31200"
On Baud=2400 download speed easily exceeds 2400bps, but Baud=300 and
baud=1200 speed is limited as it should be. Very strange behavior.
That leads to an idea of changing divider...
'User Manual' supplied with the card says that I should use
'Automatic Crystal Detection' in WinME and '1.8432 MHz' in 2K/XP.
Baud rate divider(prescaler) value in both cases should be '8.625'.
It works in XP with suggested settings.
As far as I know setting such things with setserial for CardBus devices
is not a good idea.
Any suggestions?
Relevant lspci entry:
07:00.0 Serial controller: Oxford Semiconductor Ltd OXCB950 Cardbus 16950 UART
(prog-if 06 [16950])
Subsystem: Oxford Semiconductor Ltd Unknown device 0001
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 3010 [size=8]
Region 1: Memory at 34000000 (32-bit, non-prefetchable) [size=4K]
Region 2: I/O ports at 3000 [size=16]
Region 3: Memory at 34001000 (32-bit, non-prefetchable) [size=4K]
Region 4: Memory at 34002000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [40] Power Management version 1
Flags: PMEClk- DSI- D1- D2+ AuxCurrent=0mA
PME(D0+,D1-,D2+,D3hot+,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
--
Mikhail Kolesnik
ICQ: 260259143
IRC: mike_k at freenode/#crux, rusnet/#yalta
Jabber: mike_k@xxxxxxxxxxxxxxxx
NIC handle: MKK83-UANIC
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