HP M820e CDRW - nsp32 driver.

[cga2000]

Would anyone know how I could get this external CDRW to work with a linux
2.6.20 kernel?

The cardctl [info|status|config] commands seem to give me the expected
output but a "cdrecord -scanbus" informs me that "no target could be
found".

Boot messages suggests there is an IRQ conflict:

________________________________________________________________________________
pccard: CardBus card inserted into slot 1
SCSI subsystem initialized
nsp32: loading...
es1968: clocking to 48000
PCI: Enabling device 0000:06:00.0 (0000 -> 0003)
ACPI: PCI Interrupt 0000:06:00.0[A] -> Link [LNKA] -> GSI 11 (level, low) -> IRQ 11
PCI: Setting latency timer of device 0000:06:00.0 to 64
nsp32: No EEPROM detected: 0x0
nsp32: term power on
scsi0 : NinjaSCSI-32Bi/UDE: irq 11, io 0x3000+0x80
cs: IO port probe 0x100-0x3af: clean.
cs: IO port probe 0x3e0-0x4ff: clean.
cs: IO port probe 0x820-0x8ff: clean.
cs: IO port probe 0xc00-0xcf7: clean.
cs: IO port probe 0xa00-0xaff: clean.
cs: IO port probe 0x100-0x3af: clean.
cs: IO port probe 0x3e0-0x4ff: clean.
cs: IO port probe 0x820-0x8ff: clean.
cs: IO port probe 0xc00-0xcf7: clean.
cs: IO port probe 0xa00-0xaff: clean.
cs: memory probe 0xa0000000-0xa0ffffff: clean.
pcmcia: registering new device pcmcia0.0
pcmcia: request for exclusive IRQ could not be fulfilled.
pcmcia: the driver needs updating to supported shared IRQ lines.
  ASIC rev 1,<6>eth0: Megahertz 3CCFEM556 at io 0x300, irq 3, hw_addr 00:00:86:53:8D:F7.
 64K FIFO split 1:1 Rx:Tx, autoselect MII interface.
pcmcia: registering new device pcmcia0.1
pcmcia: request for exclusive IRQ could not be fulfilled.
pcmcia: the driver needs updating to supported shared IRQ lines.
0.1: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
scsi 0:0:4:0: CD-ROM            hp       CD-Writer+ M820  1.23 PQ: 0 ANSI: 2
nsp32: irq: 11 mmio: d8806000+0x1000 slot: 0000:06:00.0 model: KME SCSI CardBus card
nsp32: Bus Reset
nsp32: Host Reset
nsp32: term power on
sr 0:0:4:0: scsi: Device offlined - not ready after error recovery
sr 0:0:4:0: rejecting I/O to offline device
sr 0:0:4:0: rejecting I/O to offline device
sr0: scsi3-mmc drive: 0x/0x caddy
sr 0:0:4:0: Attached scsi CD-ROM sr0
sr 0:0:4:0: Attached scsi generic sg0 type 5
________________________________________________________________________________

Here's the output of "lspci" in case it helps:

________________________________________________________________________________
00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 03)
00:01.0 PCI bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 03)
00:04.0 CardBus bridge: Texas Instruments PCI1225 (rev 01)
00:04.1 CardBus bridge: Texas Instruments PCI1225 (rev 01)
00:07.0 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corporation 82371AB/EB/MB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 02)
00:08.0 Multimedia audio controller: ESS Technology ES1978 Maestro 2E (rev 10)
01:00.0 VGA compatible controller: ATI Technologies Inc Rage Mobility P/M AGP 2x (rev 64)
06:00.0 SCSI storage controller: Workbit Corporation NinjaSCSI-32 KME (rev 01)
________________________________________________________________________________

And this is the output of "cat /proc/interrupts"

________________________________________________________________________________
           CPU0
  0:    1298388    XT-PIC-XT        timer
  1:      14705    XT-PIC-XT        i8042
  2:          0    XT-PIC-XT        cascade
  3:     203621    XT-PIC-XT        pcmcia0.0
  5:    1470504    XT-PIC-XT        uhci_hcd:usb1, ESS Maestro
  6:          5    XT-PIC-XT        floppy
  7:        136    XT-PIC-XT        parport0
  9:       6986    XT-PIC-XT        acpi
 11:         34    XT-PIC-XT        yenta, yenta, nsp32
 12:        577    XT-PIC-XT        i8042
 14:      17562    XT-PIC-XT        ide0
 15:      45023    XT-PIC-XT        ide1
NMI:          0
ERR:          0
________________________________________________________________________________

I spent most of the day searching for clues as to what might be the problem but
I didn't find anything that looked like a solution.

Is there something wrong with my kernel configuration?

Do I need to upgrade the nsp32 driver as suggested by the output of "dmesg"?

I rely entirely on this external CD burner to back up my system so any help
or pointers would be highly appreciated.

If [OT] please direct me to a mailing list or forum where I might be able to
find help with this.

Apologies for the verbose post.

Thanks,
cga