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PNP SMCf010 quirk: work around Toshiba Portege 4000 ACPI issues

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When we enable the SMCf010 IR device, the Toshiba Portege 4000 BIOS claims
the device is working, but it really isn't configured correctly.  The BIOS
*will* configure it, but only if we call _SRS after (1) reversing the order
of the SIR and FIR I/O port regions and (2) changing the IRQ from
active-high to active-low.

This patch addresses the 2.6.22 regression:
    "no irda0 interface (2.6.21 was OK), smsc does not find chip"

I tested this on a Portege 4000.  The smsc-ircc2 driver correctly detects
the device, and "irattach irda0 -s && irdadump" shows transmitted and
received packets.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Andrey Borzenkov <arvidjaar@mail.ru>
Cc: Samuel Ortiz <samuel@sortiz.org>
Cc: "Linus Walleij (LD/EAB)" <linus.walleij@ericsson.com>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Cc: Adam Belay <ambx1@neo.rr.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bjorn Helgaas 2007-07-06 02:39:54 -07:00 committed by Linus Torvalds
parent d57d973101
commit 41a5311465
1 changed files with 54 additions and 9 deletions
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63
drivers/pnp/quirks.c
View file

@ -136,11 +136,10 @@ static int quirk_smc_fir_enabled(struct pnp_dev *dev)
static void quirk_smc_enable(struct pnp_dev *dev)
{
/*
* If the BIOS left the device disabled, or it is enabled and
* responding correctly, we're in good shape.
*/
if (!dev->active || quirk_smc_fir_enabled(dev))
struct resource fir, sir, irq;
pnp_activate_dev(dev);
if (quirk_smc_fir_enabled(dev))
return;
/*
@ -152,16 +151,62 @@ static void quirk_smc_enable(struct pnp_dev *dev)
* this. Fortunately, they do fix things up if we auto-configure
* the device using its _PRS and _SRS methods.
*/
dev_err(&dev->dev, "%s device not responding, auto-configuring "
"resources\n", dev->id->id);
dev_err(&dev->dev, "%s not responding at SIR 0x%lx, FIR 0x%lx; "
"auto-configuring\n", dev->id->id,
(unsigned long) pnp_port_start(dev, 0),
(unsigned long) pnp_port_start(dev, 1));
pnp_disable_dev(dev);
pnp_init_resource_table(&dev->res);
pnp_auto_config_dev(dev);
pnp_activate_dev(dev);
if (quirk_smc_fir_enabled(dev)) {
dev_err(&dev->dev, "responds at SIR 0x%lx, FIR 0x%lx\n",
(unsigned long) pnp_port_start(dev, 0),
(unsigned long) pnp_port_start(dev, 1));
return;
}
if (!quirk_smc_fir_enabled(dev))
dev_err(&dev->dev, "giving up; try \"smsc-ircc2.nopnp\"\n");
/*
* The Toshiba Portege 4000 _CRS reports the FIR region first,
* followed by the SIR region. The BIOS will configure the bridge,
* but only if we call _SRS with SIR first, then FIR. It also
* reports the IRQ as active high, when it is really active low.
*/
dev_err(&dev->dev, "not responding at SIR 0x%lx, FIR 0x%lx; "
"swapping SIR/FIR and reconfiguring\n",
(unsigned long) pnp_port_start(dev, 0),
(unsigned long) pnp_port_start(dev, 1));
/*
* Clear IORESOURCE_AUTO so pnp_activate_dev() doesn't reassign
* these resources any more.
*/
fir = dev->res.port_resource[0];
sir = dev->res.port_resource[1];
fir.flags &= ~IORESOURCE_AUTO;
sir.flags &= ~IORESOURCE_AUTO;
irq = dev->res.irq_resource[0];
irq.flags &= ~IORESOURCE_AUTO;
irq.flags &= ~IORESOURCE_BITS;
irq.flags |= IORESOURCE_IRQ_LOWEDGE;
pnp_disable_dev(dev);
dev->res.port_resource[0] = sir;
dev->res.port_resource[1] = fir;
dev->res.irq_resource[0] = irq;
pnp_activate_dev(dev);
if (quirk_smc_fir_enabled(dev)) {
dev_err(&dev->dev, "responds at SIR 0x%lx, FIR 0x%lx\n",
(unsigned long) pnp_port_start(dev, 0),
(unsigned long) pnp_port_start(dev, 1));
return;
}
dev_err(&dev->dev, "giving up; try \"smsc-ircc2.nopnp\" and "
"email bjorn.helgaas@hp.com\n");
}