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

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Message-Id: <200706191731.24085.bjorn.helgaas@hp.com>
Date:	Tue, 19 Jun 2007 17:31:23 -0600
From:	Bjorn Helgaas <bjorn.helgaas@...com>
To:	Andrey Borzenkov <arvidjaar@...l.ru>
Cc:	Samuel Ortiz <samuel@...tiz.org>,
	"Linus Walleij (LD/EAB)" <linus.walleij@...csson.com>,
	linux-kernel@...r.kernel.org,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	ambx1@....rr.com, linux-pcmcia@...ts.infradead.org
Subject: Re: 2.6.22-rc: regression: no irda0 interface (2.6.21 was OK), smsc does not find chip

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
expects.)

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.

Bjorn

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?

View attachment "smsc.c" of type "text/x-csrc" (4696 bytes)

View attachment "inb.c" of type "text/x-csrc" (679 bytes)