2.6.22-rc: regression: no irda0 interface (2.6.21 was OK), smsc does not find chip

Bjorn Helgaas bjorn.helgaas at hp.com
Tue Jun 19 19:31:23 EDT 2007

On Saturday 16 June 2007 10:38:56 am Andrey Borzenkov wrote:
> it appears that quirk is not even applied because PnP tells us device is not 
> active:
> [  571.118483] pnp: PnP ACPI init
> [  571.118611] ACPI: bus type pnp registered
> [  571.158828] quirk_smc_enable: active = 0
> [  571.182090] pnp: PnP ACPI: found 12 devices

Yup.  That could probably be improved.

_CRS definitely reports SIR and FIR backwards from most platforms.

I can make the device talk by configuring it "by hand," e.g.,

  # cd /sys/bus/pnp/devices/00:0a
  # echo "set io 0x2e8-0x2ef io 0x100-0x107 irq 5 dma 1" > resources
  # echo activate > resources
  # ~/smsc
  smsc_dump: 0x24 0xfe UART1 config
  smsc_dump: 0x25 0xba SIR base (0x2e8)
  smsc_dump: 0x28 0x45 UART IRQ
  smsc_dump: 0x2b 0x20 FIR base (0x100)
  smsc_dump: 0x2c 0x01 FIR DMA
  smsc_dump: 0x0c 0x0e IRDA mode
  smsc_dump: 0x07 0x50 powerdown mode
  smsc_dump: 0x0a 0x40 toshiba mystery
  # ~/inb 0x100 8 0x100
  selecting bank 3 (fir at 0x100)
  0x0100: 0x10 0xb8 0xf2 0x00 0x51 0x00 0x00 0x03

("smsc" and "inb" are little test programs (attached).  "smsc" dumps
the SIO configuration, and "inb" dumps I/O ports.  In this case,
I'm looking at the FIR ports, and the values there are what smsc-ircc2

Seems like it should be simple to do the same thing automatically
in the driver or a quirk, but I haven't been able to get that to work.

I'll be out of the office most of the time from now until July 5, but
I'll get back to this when I return.


P.S.  "reboot" doesn't seem to work on my box.  I tried "reboot=b",
"reboot=c", "reboot=h", and none of them seems to work.  Does it work
on yours?
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