PNP: workaround HP BIOS defect that leaves SMCF010 device partly enabled (a1e7e636) · Commits · 戴 / test

Some HP/Compaq firmware reports via ACPI that the SMCF010 IR device is enabled, but in fact, it leaves the device partly disabled. HP nw8240 BIOS 68DTV Ver. F.0F, released 9/15/2005 is one BIOS that has this problem. Signed-off-by:

Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Keith Owens <kaos@ocs.com.au> Cc: Len Brown <lenb@kernel.org> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Matthieu CASTET <castet.matthieu@free.fr> Cc: Jean Tourrilhes <jt@hpl.hp.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Ville Syrjala <syrjala@sci.fi> Cc: Russell King <rmk+serial@arm.linux.org.uk> Cc: Samuel Ortiz <samuel@sortiz.org> Signed-off-by:

Andrew Morton <akpm@linux-foundation.org> Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

drivers/pnp/quirks.c

+30 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@
		#include <linux/string.h>
		#include <linux/slab.h>
		#include <linux/pnp.h>
		#include <linux/io.h>
		#include "base.h"


		@@ -106,6 +107,34 @@ static void quirk_sb16audio_resources(struct pnp_dev *dev)
		return;
		}

		static void quirk_smc_enable(struct pnp_dev *dev)
		{
		unsigned int firbase;

		if (!dev->active \|\| !pnp_port_valid(dev, 1))
		return;

		/*
		* On the HP/Compaq nw8240 (and probably other similar machines),
		* there is an SMCF010 device with two I/O port regions:
		*
		* 0x3e8-0x3ef SIR
		* 0x100-0x10f FIR
		*
		* _STA reports the device is enabled, but in fact, the BIOS
		* neglects to enable the FIR range. Fortunately, it does fully
		* enable the device if we call _SRS.
		*/
		firbase = pnp_port_start(dev, 1);
		if (inb(firbase + 0x7 /* IRCC_MASTER */) == 0xff) {
		pnp_err("%s (%s) enabled but not responding, disabling and "
		"re-enabling", dev->dev.bus_id, pnp_dev_name(dev));
		pnp_disable_dev(dev);
		pnp_activate_dev(dev);
		}
		}


		/*
		* PnP Quirks
		* Cards or devices that need some tweaking due to incomplete resource info
		@@ -126,6 +155,7 @@ static struct pnp_fixup pnp_fixups[] = {
		{ "CTL0043", quirk_sb16audio_resources },
		{ "CTL0044", quirk_sb16audio_resources },
		{ "CTL0045", quirk_sb16audio_resources },
		{ "SMCf010", quirk_smc_enable },
		{ "" }
		};

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