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    SubjectRe: 2.6.22-rc: regression: no irda0 interface (2.6.21 was OK), smsc does not find chip
    Date
    On Monday 04 June 2007, Bjorn Helgaas wrote:
    > On Sunday 03 June 2007 02:16:05 am Andrey Borzenkov wrote:
    > > On Sunday 03 June 2007, Andrey Borzenkov wrote:
    > > > Under 2.6.22-rc I lost irda0 interface - smsc claims no device present.
    > > > Nothing was changed in setup except kernel version.
    > > >
    > > > 2.6.21:
    > > >
    > > > Detected unconfigured Toshiba laptop with ALi ISA bridge SMSC IrDA
    > > > chip, pre-configuring device.
    > > > Activated ALi 1533 ISA bridge port 0x02e8.
    > > > Activated ALi 1533 ISA bridge port 0x02f8.
    > > > found SMC SuperIO Chip (devid=0x5a rev=00 base=0x002e): LPC47N227
    > > > smsc_superio_flat(): IrDA not enabled
    >
    > The "IrDA not enabled" makes me think that even in the working case,
    > the BIOS left the IR port disabled. Are there any BIOS setup switches
    > that affect this port?
    >

    No (at least in BIOS setup screens). The closest is COM port setting
    (IRQ/DMA). This looks funny as I do not have COM interface anyway but may be
    docking station has.

    > > > smsc_superio_flat(): fir: 0x2f8, sir: 0x2e8, dma: 03, irq: 7, mode:
    > > > 0x02 SMsC IrDA Controller found
    > > > IrCC version 2.0, firport 0x2f8, sirport 0x2e8 dma=3, irq=7
    >
    > It seems strange that both FIR and SIR would use legacy COM ports
    > (0x2f8 == COM2, 0x2e8 == COM4). My HP nw8240 has SIR at 0x3e8 (COM3)
    > and FIR at 0x100.
    >

    Well, this is how code was written. There was no autodetection anyway, it used
    hardcoded builtin (unless overridden).

    > Do you know if both the FIR and SIR interfaces work? I'm wondering if
    > your irda0 only uses SIR at 0x2e8, and FIR has always been broken.
    >

    How can I check it?

    > > > No transceiver found. Defaulting to Fast pin select
    > > > IrDA: Registered device irda0
    > > >
    > > >
    > > > 2.6.22-rc3:
    > > > Detected unconfigured Toshiba laptop with ALi ISA bridge SMSC IrDA
    > > > chip, pre-configuring device.
    > > > Activated ALi 1533 ISA bridge port 0x02e8.
    > > > Activated ALi 1533 ISA bridge port 0x02f8.
    > > > pnp: Device 00:0a activated.
    > > > smsc_ircc_present(), addr 0x02e8 - no device found!
    > > > pnp: Device 00:0a disabled.
    > >
    > > {pts/1}% cat /sys/bus/pnp/devices/00:0a/resources
    > > state = active
    > > io 0x100-0x107
    > > io 0x2e8-0x2ef
    > > irq 5
    > > dma 1
    >
    > The PNP probe I added expects SIR at the first range and FIR at the
    > second. I would think the 0x2e8 range would be SIR, since it's compatible
    > with a COM port. Is it possible the BIOS just reports these in the
    > opposite order, with FIR first and SIR second? Can you try the patch
    > below?
    >

    It does not work unfortunately:

    Detected unconfigured Toshiba laptop with ALi ISA bridge SMSC IrDA chip,
    pre-configuring device.
    Activated ALi 1533 ISA bridge port 0x02e8.
    Activated ALi 1533 ISA bridge port 0x02f8.
    pnp: Device 00:0a activated.
    smsc_ircc_pnp_probe(): fir 0x100 sir 0x2e8 dma 1 irq 5
    High: 0x11, Chip 0x0
    smsc_ircc_present(), addr 0x0100 - no device found!
    pnp: Device 00:0a disabled.


    > Index: linux-2.6/drivers/net/irda/smsc-ircc2.c
    > ===================================================================
    > --- linux-2.6.orig/drivers/net/irda/smsc-ircc2.c 2007-06-04
    > 10:21:46.000000000 -0600 +++
    > linux-2.6/drivers/net/irda/smsc-ircc2.c 2007-06-04 10:21:57.000000000 -0600
    > @@ -386,8 +386,8 @@
    > pnp_dma_valid(dev, 0) && pnp_irq_valid(dev, 0)))
    > return -EINVAL;
    >
    > - sirbase = pnp_port_start(dev, 0);
    > - firbase = pnp_port_start(dev, 1);
    > + firbase = pnp_port_start(dev, 0);
    > + sirbase = pnp_port_start(dev, 1);
    > dma = pnp_dma(dev, 0);
    > irq = pnp_irq(dev, 0);


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