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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Date:	Tue, 5 Jun 2007 14:06:17 +0200
From:	"Linus Walleij (LD/EAB)" <linus.walleij@...csson.com>
To:	"Samuel Ortiz" <samuel@...tiz.org>,
	"Andrey Borzenkov" <arvidjaar@...l.ru>
Cc:	<linux-kernel@...r.kernel.org>,
	"Michal Piotrowski" <michal.k.k.piotrowski@...il.com>,
	<ambx1@....rr.com>, <bjorn.helgaas@...com>
Subject: RE: 2.6.22-rc: regression: no irda0 interface (2.6.21 was OK), smsc does not find chip

Andrey wrote:

> And here is what PnP tells us:
> {pts/1}% cat /sys/bus/pnp/devices/00:0a/options
> port 0x100-0x130, align 0xf, size 0x8, 16-bit address decoding irq 
> 3,4,5,6,7,10,11 High-Edge dma 1,2,3 16-bit compatible
> Dependent: 01 - Priority acceptable
>    port 0x3f8-0x3f8, align 0x0, size 0x8, 16-bit address decoding
> Dependent: 02 - Priority acceptable
>    port 0x2e8-0x2e8, align 0x0, size 0x8, 16-bit address decoding
> Dependent: 03 - Priority acceptable
>    port 0x2f8-0x2f8, align 0x0, size 0x8, 16-bit address decoding
> Dependent: 04 - Priority acceptable
>    port 0x3e8-0x3e8, align 0x0, size 0x8, 16-bit address decoding 
> {pts/1}% cat /sys/bus/pnp/devices/00:0a/resources
> state = disabled
> {pts/1}% sudo sh -c 'echo activate > 
/sys/bus/pnp/devices/00:0a/resources'
> {pts/1}% cat /sys/bus/pnp/devices/00:0a/resources
> state = active
> io 0x100-0x107
> io 0x2e8-0x2ef
> irq 5
> dma 1

These values *could* be correct (not all PnP BIOS:es can be trusted,
apparently). What we need to do really, is to get PnP working
properly with smsc-ircc2 and the pass these PnP settings through
as if they were parameters to the module, in the call to 
smsc_ircc_preconfigure_subsystems() in the smsc_ircc_init() call.
Then it will (probably) preconfigure the bridge for the
correct ports all the time.

The static table I've put in there just happens to be factory
defaults on a few machines, subject to change whenever some HW
is added/removed I believe.

Linus
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