[PATCH] w1: cleanups.

[linux-2.6/verdex.git] / drivers / pci / quirks.c

/*
 *  This file contains work-arounds for many known PCI hardware
 *  bugs.  Devices present only on certain architectures (host
 *  bridges et cetera) should be handled in arch-specific code.
 *
 *  Note: any quirks for hotpluggable devices must _NOT_ be declared __init.
 *
 *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
 *
 *  The bridge optimization stuff has been removed. If you really
 *  have a silly BIOS which is unable to set your host bridge right,
 *  use the PowerTweak utility (see http://powertweak.sourceforge.net).
 */

#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/acpi.h>
#include "pci.h"

/* Deal with broken BIOS'es that neglect to enable passive release,
   which can cause problems in combination with the 82441FX/PPro MTRRs */
static void __devinit quirk_passive_release(struct pci_dev *dev)
{
        struct pci_dev *d = NULL;
        unsigned char dlc;

        /* We have to make sure a particular bit is set in the PIIX3
           ISA bridge, so we have to go out and find it. */
        while ((d = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0, d))) {
                pci_read_config_byte(d, 0x82, &dlc);
                if (!(dlc & 1<<1)) {
                        printk(KERN_ERR "PCI: PIIX3: Enabling Passive Release on %s\n", pci_name(d));
                        dlc |= 1<<1;
                        pci_write_config_byte(d, 0x82, dlc);
                }
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82441,      quirk_passive_release );

/*  The VIA VP2/VP3/MVP3 seem to have some 'features'. There may be a workaround
    but VIA don't answer queries. If you happen to have good contacts at VIA
    ask them for me please -- Alan 
    
    This appears to be BIOS not version dependent. So presumably there is a 
    chipset level fix */
int isa_dma_bridge_buggy;               /* Exported */
    
static void __devinit quirk_isa_dma_hangs(struct pci_dev *dev)
{
        if (!isa_dma_bridge_buggy) {
                isa_dma_bridge_buggy=1;
                printk(KERN_INFO "Activating ISA DMA hang workarounds.\n");
        }
}
        /*
         * Its not totally clear which chipsets are the problematic ones
         * We know 82C586 and 82C596 variants are affected.
         */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_82C586_0,     quirk_isa_dma_hangs );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_82C596,       quirk_isa_dma_hangs );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82371SB_0,  quirk_isa_dma_hangs );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL,       PCI_DEVICE_ID_AL_M1533,         quirk_isa_dma_hangs );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC,      PCI_DEVICE_ID_NEC_CBUS_1,       quirk_isa_dma_hangs );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC,      PCI_DEVICE_ID_NEC_CBUS_2,       quirk_isa_dma_hangs );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC,      PCI_DEVICE_ID_NEC_CBUS_3,       quirk_isa_dma_hangs );

int pci_pci_problems;

/*
 *      Chipsets where PCI->PCI transfers vanish or hang
 */
static void __devinit quirk_nopcipci(struct pci_dev *dev)
{
        if ((pci_pci_problems & PCIPCI_FAIL)==0) {
                printk(KERN_INFO "Disabling direct PCI/PCI transfers.\n");
                pci_pci_problems |= PCIPCI_FAIL;
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI,       PCI_DEVICE_ID_SI_5597,          quirk_nopcipci );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI,       PCI_DEVICE_ID_SI_496,           quirk_nopcipci );

/*
 *      Triton requires workarounds to be used by the drivers
 */
static void __devinit quirk_triton(struct pci_dev *dev)
{
        if ((pci_pci_problems&PCIPCI_TRITON)==0) {
                printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
                pci_pci_problems |= PCIPCI_TRITON;
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82437,      quirk_triton ); 
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82437VX,    quirk_triton ); 
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82439,      quirk_triton ); 
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82439TX,    quirk_triton ); 

/*
 *      VIA Apollo KT133 needs PCI latency patch
 *      Made according to a windows driver based patch by George E. Breese
 *      see PCI Latency Adjust on http://www.viahardware.com/download/viatweak.shtm
 *      Also see http://www.au-ja.org/review-kt133a-1-en.phtml for
 *      the info on which Mr Breese based his work.
 *
 *      Updated based on further information from the site and also on
 *      information provided by VIA 
 */
static void __devinit quirk_vialatency(struct pci_dev *dev)
{
        struct pci_dev *p;
        u8 rev;
        u8 busarb;
        /* Ok we have a potential problem chipset here. Now see if we have
           a buggy southbridge */
           
        p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, NULL);
        if (p!=NULL) {
                pci_read_config_byte(p, PCI_CLASS_REVISION, &rev);
                /* 0x40 - 0x4f == 686B, 0x10 - 0x2f == 686A; thanks Dan Hollis */
                /* Check for buggy part revisions */
                if (rev < 0x40 || rev > 0x42)
                        goto exit;
        } else {
                p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, NULL);
                if (p==NULL)    /* No problem parts */
                        goto exit;
                pci_read_config_byte(p, PCI_CLASS_REVISION, &rev);
                /* Check for buggy part revisions */
                if (rev < 0x10 || rev > 0x12) 
                        goto exit;
        }
        
        /*
         *      Ok we have the problem. Now set the PCI master grant to 
         *      occur every master grant. The apparent bug is that under high
         *      PCI load (quite common in Linux of course) you can get data
         *      loss when the CPU is held off the bus for 3 bus master requests
         *      This happens to include the IDE controllers....
         *
         *      VIA only apply this fix when an SB Live! is present but under
         *      both Linux and Windows this isnt enough, and we have seen
         *      corruption without SB Live! but with things like 3 UDMA IDE
         *      controllers. So we ignore that bit of the VIA recommendation..
         */

        pci_read_config_byte(dev, 0x76, &busarb);
        /* Set bit 4 and bi 5 of byte 76 to 0x01 
           "Master priority rotation on every PCI master grant */
        busarb &= ~(1<<5);
        busarb |= (1<<4);
        pci_write_config_byte(dev, 0x76, busarb);
        printk(KERN_INFO "Applying VIA southbridge workaround.\n");
exit:
        pci_dev_put(p);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_8363_0,       quirk_vialatency );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_8371_1,       quirk_vialatency );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_8361,         quirk_vialatency );

/*
 *      VIA Apollo VP3 needs ETBF on BT848/878
 */
static void __devinit quirk_viaetbf(struct pci_dev *dev)
{
        if ((pci_pci_problems&PCIPCI_VIAETBF)==0) {
                printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
                pci_pci_problems |= PCIPCI_VIAETBF;
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_82C597_0,     quirk_viaetbf );

static void __devinit quirk_vsfx(struct pci_dev *dev)
{
        if ((pci_pci_problems&PCIPCI_VSFX)==0) {
                printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
                pci_pci_problems |= PCIPCI_VSFX;
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_82C576,       quirk_vsfx );

/*
 *      Ali Magik requires workarounds to be used by the drivers
 *      that DMA to AGP space. Latency must be set to 0xA and triton
 *      workaround applied too
 *      [Info kindly provided by ALi]
 */     
static void __init quirk_alimagik(struct pci_dev *dev)
{
        if ((pci_pci_problems&PCIPCI_ALIMAGIK)==0) {
                printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
                pci_pci_problems |= PCIPCI_ALIMAGIK|PCIPCI_TRITON;
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL,       PCI_DEVICE_ID_AL_M1647,         quirk_alimagik );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL,       PCI_DEVICE_ID_AL_M1651,         quirk_alimagik );

/*
 *      Natoma has some interesting boundary conditions with Zoran stuff
 *      at least
 */
static void __devinit quirk_natoma(struct pci_dev *dev)
{
        if ((pci_pci_problems&PCIPCI_NATOMA)==0) {
                printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
                pci_pci_problems |= PCIPCI_NATOMA;
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82441,      quirk_natoma ); 
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82443LX_0,  quirk_natoma ); 
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82443LX_1,  quirk_natoma ); 
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82443BX_0,  quirk_natoma ); 
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82443BX_1,  quirk_natoma ); 
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82443BX_2,  quirk_natoma );

/*
 *  This chip can cause PCI parity errors if config register 0xA0 is read
 *  while DMAs are occurring.
 */
static void __devinit quirk_citrine(struct pci_dev *dev)
{
        dev->cfg_size = 0xA0;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM,     PCI_DEVICE_ID_IBM_CITRINE,      quirk_citrine );

/*
 *  S3 868 and 968 chips report region size equal to 32M, but they decode 64M.
 *  If it's needed, re-allocate the region.
 */
static void __devinit quirk_s3_64M(struct pci_dev *dev)
{
        struct resource *r = &dev->resource[0];

        if ((r->start & 0x3ffffff) || r->end != r->start + 0x3ffffff) {
                r->start = 0;
                r->end = 0x3ffffff;
        }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3,      PCI_DEVICE_ID_S3_868,           quirk_s3_64M );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3,      PCI_DEVICE_ID_S3_968,           quirk_s3_64M );

static void __devinit quirk_io_region(struct pci_dev *dev, unsigned region, unsigned size, int nr)
{
        region &= ~(size-1);
        if (region) {
                struct resource *res = dev->resource + nr;

                res->name = pci_name(dev);
                res->start = region;
                res->end = region + size - 1;
                res->flags = IORESOURCE_IO;
                pci_claim_resource(dev, nr);
        }
}       

/*
 *      ATI Northbridge setups MCE the processor if you even
 *      read somewhere between 0x3b0->0x3bb or read 0x3d3
 */
static void __devinit quirk_ati_exploding_mce(struct pci_dev *dev)
{
        printk(KERN_INFO "ATI Northbridge, reserving I/O ports 0x3b0 to 0x3bb.\n");
        /* Mae rhaid i ni beidio ag edrych ar y lleoliadiau I/O hyn */
        request_region(0x3b0, 0x0C, "RadeonIGP");
        request_region(0x3d3, 0x01, "RadeonIGP");
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI,      PCI_DEVICE_ID_ATI_RS100,   quirk_ati_exploding_mce );

/*
 * Let's make the southbridge information explicit instead
 * of having to worry about people probing the ACPI areas,
 * for example.. (Yes, it happens, and if you read the wrong
 * ACPI register it will put the machine to sleep with no
 * way of waking it up again. Bummer).
 *
 * ALI M7101: Two IO regions pointed to by words at
 *      0xE0 (64 bytes of ACPI registers)
 *      0xE2 (32 bytes of SMB registers)
 */
static void __devinit quirk_ali7101_acpi(struct pci_dev *dev)
{
        u16 region;

        pci_read_config_word(dev, 0xE0, &region);
        quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES);
        pci_read_config_word(dev, 0xE2, &region);
        quirk_io_region(dev, region, 32, PCI_BRIDGE_RESOURCES+1);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL,      PCI_DEVICE_ID_AL_M7101,         quirk_ali7101_acpi );

/*
 * PIIX4 ACPI: Two IO regions pointed to by longwords at
 *      0x40 (64 bytes of ACPI registers)
 *      0x90 (32 bytes of SMB registers)
 */
static void __devinit quirk_piix4_acpi(struct pci_dev *dev)
{
        u32 region;

        pci_read_config_dword(dev, 0x40, &region);
        quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES);
        pci_read_config_dword(dev, 0x90, &region);
        quirk_io_region(dev, region, 32, PCI_BRIDGE_RESOURCES+1);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82371AB_3,  quirk_piix4_acpi );

/*
 * ICH4, ICH4-M, ICH5, ICH5-M ACPI: Three IO regions pointed to by longwords at
 *      0x40 (128 bytes of ACPI, GPIO & TCO registers)
 *      0x58 (64 bytes of GPIO I/O space)
 */
static void __devinit quirk_ich4_lpc_acpi(struct pci_dev *dev)
{
        u32 region;

        pci_read_config_dword(dev, 0x40, &region);
        quirk_io_region(dev, region, 128, PCI_BRIDGE_RESOURCES);

        pci_read_config_dword(dev, 0x58, &region);
        quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES+1);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801AA_0,         quirk_ich4_lpc_acpi );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801AB_0,         quirk_ich4_lpc_acpi );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801BA_0,         quirk_ich4_lpc_acpi );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801BA_10,        quirk_ich4_lpc_acpi );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801CA_0,         quirk_ich4_lpc_acpi );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801CA_12,        quirk_ich4_lpc_acpi );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801DB_0,         quirk_ich4_lpc_acpi );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801DB_12,        quirk_ich4_lpc_acpi );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801EB_0,         quirk_ich4_lpc_acpi );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_ESB_1,             quirk_ich4_lpc_acpi );

/*
 * VIA ACPI: One IO region pointed to by longword at
 *      0x48 or 0x20 (256 bytes of ACPI registers)
 */
static void __devinit quirk_vt82c586_acpi(struct pci_dev *dev)
{
        u8 rev;
        u32 region;

        pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
        if (rev & 0x10) {
                pci_read_config_dword(dev, 0x48, &region);
                region &= PCI_BASE_ADDRESS_IO_MASK;
                quirk_io_region(dev, region, 256, PCI_BRIDGE_RESOURCES);
        }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,     PCI_DEVICE_ID_VIA_82C586_3,     quirk_vt82c586_acpi );

/*
 * VIA VT82C686 ACPI: Three IO region pointed to by (long)words at
 *      0x48 (256 bytes of ACPI registers)
 *      0x70 (128 bytes of hardware monitoring register)
 *      0x90 (16 bytes of SMB registers)
 */
static void __devinit quirk_vt82c686_acpi(struct pci_dev *dev)
{
        u16 hm;
        u32 smb;

        quirk_vt82c586_acpi(dev);

        pci_read_config_word(dev, 0x70, &hm);
        hm &= PCI_BASE_ADDRESS_IO_MASK;
        quirk_io_region(dev, hm, 128, PCI_BRIDGE_RESOURCES + 1);

        pci_read_config_dword(dev, 0x90, &smb);
        smb &= PCI_BASE_ADDRESS_IO_MASK;
        quirk_io_region(dev, smb, 16, PCI_BRIDGE_RESOURCES + 2);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,     PCI_DEVICE_ID_VIA_82C686_4,     quirk_vt82c686_acpi );


#ifdef CONFIG_X86_IO_APIC 

#include <asm/io_apic.h>

/*
 * VIA 686A/B: If an IO-APIC is active, we need to route all on-chip
 * devices to the external APIC.
 *
 * TODO: When we have device-specific interrupt routers,
 * this code will go away from quirks.
 */
static void __devinit quirk_via_ioapic(struct pci_dev *dev)
{
        u8 tmp;
        
        if (nr_ioapics < 1)
                tmp = 0;    /* nothing routed to external APIC */
        else
                tmp = 0x1f; /* all known bits (4-0) routed to external APIC */
                
        printk(KERN_INFO "PCI: %sbling Via external APIC routing\n",
               tmp == 0 ? "Disa" : "Ena");

        /* Offset 0x58: External APIC IRQ output control */
        pci_write_config_byte (dev, 0x58, tmp);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,      PCI_DEVICE_ID_VIA_82C686,       quirk_via_ioapic );

/*
 * The AMD io apic can hang the box when an apic irq is masked.
 * We check all revs >= B0 (yet not in the pre production!) as the bug
 * is currently marked NoFix
 *
 * We have multiple reports of hangs with this chipset that went away with
 * noapic specified. For the moment we assume its the errata. We may be wrong
 * of course. However the advice is demonstrably good even if so..
 */
static void __devinit quirk_amd_ioapic(struct pci_dev *dev)
{
        u8 rev;

        pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
        if (rev >= 0x02) {
                printk(KERN_WARNING "I/O APIC: AMD Errata #22 may be present. In the event of instability try\n");
                printk(KERN_WARNING "        : booting with the \"noapic\" option.\n");
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD,      PCI_DEVICE_ID_AMD_VIPER_7410,   quirk_amd_ioapic );

static void __init quirk_ioapic_rmw(struct pci_dev *dev)
{
        if (dev->devfn == 0 && dev->bus->number == 0)
                sis_apic_bug = 1;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI,       PCI_ANY_ID,                     quirk_ioapic_rmw );

int pci_msi_quirk;

#define AMD8131_revA0        0x01
#define AMD8131_revB0        0x11
#define AMD8131_MISC         0x40
#define AMD8131_NIOAMODE_BIT 0
static void __init quirk_amd_8131_ioapic(struct pci_dev *dev) 
{ 
        unsigned char revid, tmp;
        
        pci_msi_quirk = 1;
        printk(KERN_WARNING "PCI: MSI quirk detected. pci_msi_quirk set.\n");

        if (nr_ioapics == 0) 
                return;

        pci_read_config_byte(dev, PCI_REVISION_ID, &revid);
        if (revid == AMD8131_revA0 || revid == AMD8131_revB0) {
                printk(KERN_INFO "Fixing up AMD8131 IOAPIC mode\n"); 
                pci_read_config_byte( dev, AMD8131_MISC, &tmp);
                tmp &= ~(1 << AMD8131_NIOAMODE_BIT);
                pci_write_config_byte( dev, AMD8131_MISC, tmp);
        }
} 
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_APIC,         quirk_amd_8131_ioapic ); 

static void __init quirk_svw_msi(struct pci_dev *dev)
{
        pci_msi_quirk = 1;
        printk(KERN_WARNING "PCI: MSI quirk detected. pci_msi_quirk set.\n");
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_GCNB_LE, quirk_svw_msi );
#endif /* CONFIG_X86_IO_APIC */


/*
 * FIXME: it is questionable that quirk_via_acpi
 * is needed.  It shows up as an ISA bridge, and does not
 * support the PCI_INTERRUPT_LINE register at all.  Therefore
 * it seems like setting the pci_dev's 'irq' to the
 * value of the ACPI SCI interrupt is only done for convenience.
 *      -jgarzik
 */
static void __devinit quirk_via_acpi(struct pci_dev *d)
{
        /*
         * VIA ACPI device: SCI IRQ line in PCI config byte 0x42
         */
        u8 irq;
        pci_read_config_byte(d, 0x42, &irq);
        irq &= 0xf;
        if (irq && (irq != 2))
                d->irq = irq;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,     PCI_DEVICE_ID_VIA_82C586_3,     quirk_via_acpi );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,     PCI_DEVICE_ID_VIA_82C686_4,     quirk_via_acpi );

/*
 * Via 686A/B:  The PCI_INTERRUPT_LINE register for the on-chip
 * devices, USB0/1, AC97, MC97, and ACPI, has an unusual feature:
 * when written, it makes an internal connection to the PIC.
 * For these devices, this register is defined to be 4 bits wide.
 * Normally this is fine.  However for IO-APIC motherboards, or
 * non-x86 architectures (yes Via exists on PPC among other places),
 * we must mask the PCI_INTERRUPT_LINE value versus 0xf to get
 * interrupts delivered properly.
 */
static void quirk_via_irq(struct pci_dev *dev)
{
        u8 irq, new_irq;

        new_irq = dev->irq & 0xf;
        pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
        if (new_irq != irq) {
                printk(KERN_INFO "PCI: Via IRQ fixup for %s, from %d to %d\n",
                        pci_name(dev), irq, new_irq);
                udelay(15);     /* unknown if delay really needed */
                pci_write_config_byte(dev, PCI_INTERRUPT_LINE, new_irq);
        }
}
DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_ANY_ID, quirk_via_irq);

/*
 * PIIX3 USB: We have to disable USB interrupts that are
 * hardwired to PIRQD# and may be shared with an
 * external device.
 *
 * Legacy Support Register (LEGSUP):
 *     bit13:  USB PIRQ Enable (USBPIRQDEN),
 *     bit4:   Trap/SMI On IRQ Enable (USBSMIEN).
 *
 * We mask out all r/wc bits, too.
 */
static void __devinit quirk_piix3_usb(struct pci_dev *dev)
{
        u16 legsup;

        pci_read_config_word(dev, 0xc0, &legsup);
        legsup &= 0x50ef;
        pci_write_config_word(dev, 0xc0, legsup);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82371SB_2,  quirk_piix3_usb );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82371AB_2,  quirk_piix3_usb );

/*
 * VIA VT82C598 has its device ID settable and many BIOSes
 * set it to the ID of VT82C597 for backward compatibility.
 * We need to switch it off to be able to recognize the real
 * type of the chip.
 */
static void __devinit quirk_vt82c598_id(struct pci_dev *dev)
{
        pci_write_config_byte(dev, 0xfc, 0);
        pci_read_config_word(dev, PCI_DEVICE_ID, &dev->device);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,     PCI_DEVICE_ID_VIA_82C597_0,     quirk_vt82c598_id );

/*
 * CardBus controllers have a legacy base address that enables them
 * to respond as i82365 pcmcia controllers.  We don't want them to
 * do this even if the Linux CardBus driver is not loaded, because
 * the Linux i82365 driver does not (and should not) handle CardBus.
 */
static void __devinit quirk_cardbus_legacy(struct pci_dev *dev)
{
        if ((PCI_CLASS_BRIDGE_CARDBUS << 8) ^ dev->class)
                return;
        pci_write_config_dword(dev, PCI_CB_LEGACY_MODE_BASE, 0);
}
DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, quirk_cardbus_legacy);

/*
 * Following the PCI ordering rules is optional on the AMD762. I'm not
 * sure what the designers were smoking but let's not inhale...
 *
 * To be fair to AMD, it follows the spec by default, its BIOS people
 * who turn it off!
 */
static void __devinit quirk_amd_ordering(struct pci_dev *dev)
{
        u32 pcic;
        pci_read_config_dword(dev, 0x4C, &pcic);
        if ((pcic&6)!=6) {
                pcic |= 6;
                printk(KERN_WARNING "BIOS failed to enable PCI standards compliance, fixing this error.\n");
                pci_write_config_dword(dev, 0x4C, pcic);
                pci_read_config_dword(dev, 0x84, &pcic);
                pcic |= (1<<23);        /* Required in this mode */
                pci_write_config_dword(dev, 0x84, pcic);
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD,      PCI_DEVICE_ID_AMD_FE_GATE_700C, quirk_amd_ordering );

/*
 *      DreamWorks provided workaround for Dunord I-3000 problem
 *
 *      This card decodes and responds to addresses not apparently
 *      assigned to it. We force a larger allocation to ensure that
 *      nothing gets put too close to it.
 */
static void __devinit quirk_dunord ( struct pci_dev * dev )
{
        struct resource *r = &dev->resource [1];
        r->start = 0;
        r->end = 0xffffff;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_DUNORD,  PCI_DEVICE_ID_DUNORD_I3000,     quirk_dunord );

/*
 * i82380FB mobile docking controller: its PCI-to-PCI bridge
 * is subtractive decoding (transparent), and does indicate this
 * in the ProgIf. Unfortunately, the ProgIf value is wrong - 0x80
 * instead of 0x01.
 */
static void __devinit quirk_transparent_bridge(struct pci_dev *dev)
{
        dev->transparent = 1;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82380FB,    quirk_transparent_bridge );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TOSHIBA, 0x605,  quirk_transparent_bridge );

/*
 * Common misconfiguration of the MediaGX/Geode PCI master that will
 * reduce PCI bandwidth from 70MB/s to 25MB/s.  See the GXM/GXLV/GX1
 * datasheets found at http://www.national.com/ds/GX for info on what
 * these bits do.  <christer@weinigel.se>
 */
static void __init quirk_mediagx_master(struct pci_dev *dev)
{
        u8 reg;
        pci_read_config_byte(dev, 0x41, &reg);
        if (reg & 2) {
                reg &= ~2;
                printk(KERN_INFO "PCI: Fixup for MediaGX/Geode Slave Disconnect Boundary (0x41=0x%02x)\n", reg);
                pci_write_config_byte(dev, 0x41, reg);
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CYRIX,    PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master );

/*
 * As per PCI spec, ignore base address registers 0-3 of the IDE controllers
 * running in Compatible mode (bits 0 and 2 in the ProgIf for primary and
 * secondary channels respectively). If the device reports Compatible mode
 * but does use BAR0-3 for address decoding, we assume that firmware has
 * programmed these BARs with standard values (0x1f0,0x3f4 and 0x170,0x374).
 * Exceptions (if they exist) must be handled in chip/architecture specific
 * fixups.
 *
 * Note: for non x86 people. You may need an arch specific quirk to handle
 * moving IDE devices to native mode as well. Some plug in card devices power
 * up in compatible mode and assume the BIOS will adjust them.
 *
 * Q: should we load the 0x1f0,0x3f4 into the registers or zap them as
 * we do now ? We don't want is pci_enable_device to come along
 * and assign new resources. Both approaches work for that.
 */ 
static void __devinit quirk_ide_bases(struct pci_dev *dev)
{
       struct resource *res;
       int first_bar = 2, last_bar = 0;

       if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
               return;

       res = &dev->resource[0];

       /* primary channel: ProgIf bit 0, BAR0, BAR1 */
       if (!(dev->class & 1) && (res[0].flags || res[1].flags)) { 
               res[0].start = res[0].end = res[0].flags = 0;
               res[1].start = res[1].end = res[1].flags = 0;
               first_bar = 0;
               last_bar = 1;
       }

       /* secondary channel: ProgIf bit 2, BAR2, BAR3 */
       if (!(dev->class & 4) && (res[2].flags || res[3].flags)) { 
               res[2].start = res[2].end = res[2].flags = 0;
               res[3].start = res[3].end = res[3].flags = 0;
               last_bar = 3;
       }

       if (!last_bar)
               return;

       printk(KERN_INFO "PCI: Ignoring BAR%d-%d of IDE controller %s\n",
              first_bar, last_bar, pci_name(dev));
}
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, quirk_ide_bases);

/*
 *      Ensure C0 rev restreaming is off. This is normally done by
 *      the BIOS but in the odd case it is not the results are corruption
 *      hence the presence of a Linux check
 */
static void __init quirk_disable_pxb(struct pci_dev *pdev)
{
        u16 config;
        u8 rev;
        
        pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
        if (rev != 0x04)                /* Only C0 requires this */
                return;
        pci_read_config_word(pdev, 0x40, &config);
        if (config & (1<<6)) {
                config &= ~(1<<6);
                pci_write_config_word(pdev, 0x40, config);
                printk(KERN_INFO "PCI: C0 revision 450NX. Disabling PCI restreaming.\n");
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82454NX,    quirk_disable_pxb );


/*
 *      Serverworks CSB5 IDE does not fully support native mode
 */
static void __devinit quirk_svwks_csb5ide(struct pci_dev *pdev)
{
        u8 prog;
        pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
        if (prog & 5) {
                prog &= ~5;
                pdev->class &= ~5;
                pci_write_config_byte(pdev, PCI_CLASS_PROG, prog);
                /* need to re-assign BARs for compat mode */
                quirk_ide_bases(pdev);
        }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, quirk_svwks_csb5ide );

/*
 *      Intel 82801CAM ICH3-M datasheet says IDE modes must be the same
 */
static void __init quirk_ide_samemode(struct pci_dev *pdev)
{
        u8 prog;

        pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);

        if (((prog & 1) && !(prog & 4)) || ((prog & 4) && !(prog & 1))) {
                printk(KERN_INFO "PCI: IDE mode mismatch; forcing legacy mode\n");
                prog &= ~5;
                pdev->class &= ~5;
                pci_write_config_byte(pdev, PCI_CLASS_PROG, prog);
                /* need to re-assign BARs for compat mode */
                quirk_ide_bases(pdev);
        }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_10, quirk_ide_samemode);

/* This was originally an Alpha specific thing, but it really fits here.
 * The i82375 PCI/EISA bridge appears as non-classified. Fix that.
 */
static void __init quirk_eisa_bridge(struct pci_dev *dev)
{
        dev->class = PCI_CLASS_BRIDGE_EISA << 8;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82375,      quirk_eisa_bridge );

/*
 * On ASUS P4B boards, the SMBus PCI Device within the ICH2/4 southbridge
 * is not activated. The myth is that Asus said that they do not want the
 * users to be irritated by just another PCI Device in the Win98 device
 * manager. (see the file prog/hotplug/README.p4b in the lm_sensors 
 * package 2.7.0 for details)
 *
 * The SMBus PCI Device can be activated by setting a bit in the ICH LPC 
 * bridge. Unfortunately, this device has no subvendor/subdevice ID. So it 
 * becomes necessary to do this tweak in two steps -- I've chosen the Host
 * bridge as trigger.
 */
static int __initdata asus_hides_smbus = 0;

static void __init asus_hides_smbus_hostbridge(struct pci_dev *dev)
{
        if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK)) {
                if (dev->device == PCI_DEVICE_ID_INTEL_82845_HB)
                        switch(dev->subsystem_device) {
                        case 0x8070: /* P4B */
                        case 0x8088: /* P4B533 */
                        case 0x1626: /* L3C notebook */
                                asus_hides_smbus = 1;
                        }
                if (dev->device == PCI_DEVICE_ID_INTEL_82845G_HB)
                        switch(dev->subsystem_device) {
                        case 0x80b1: /* P4GE-V */
                        case 0x80b2: /* P4PE */
                        case 0x8093: /* P4B533-V */
                                asus_hides_smbus = 1;
                        }
                if (dev->device == PCI_DEVICE_ID_INTEL_82850_HB)
                        switch(dev->subsystem_device) {
                        case 0x8030: /* P4T533 */
                                asus_hides_smbus = 1;
                        }
                if (dev->device == PCI_DEVICE_ID_INTEL_7205_0)
                        switch (dev->subsystem_device) {
                        case 0x8070: /* P4G8X Deluxe */
                                asus_hides_smbus = 1;
                        }
                if (dev->device == PCI_DEVICE_ID_INTEL_82855GM_HB)
                        switch (dev->subsystem_device) {
                        case 0x1751: /* M2N notebook */
                        case 0x1821: /* M5N notebook */
                                asus_hides_smbus = 1;
                        }
                if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
                        switch (dev->subsystem_device) {
                        case 0x184b: /* W1N notebook */
                        case 0x186a: /* M6Ne notebook */
                                asus_hides_smbus = 1;
                        }
        } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_HP)) {
                if (dev->device ==  PCI_DEVICE_ID_INTEL_82855PM_HB)
                        switch(dev->subsystem_device) {
                        case 0x088C: /* HP Compaq nc8000 */
                        case 0x0890: /* HP Compaq nc6000 */
                                asus_hides_smbus = 1;
                        }
                if (dev->device == PCI_DEVICE_ID_INTEL_82865_HB)
                        switch (dev->subsystem_device) {
                        case 0x12bc: /* HP D330L */
                                asus_hides_smbus = 1;
                        }
        } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_TOSHIBA)) {
                if (dev->device == PCI_DEVICE_ID_INTEL_82855GM_HB)
                        switch(dev->subsystem_device) {
                        case 0x0001: /* Toshiba Satellite A40 */
                                asus_hides_smbus = 1;
                        }
       } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG)) {
               if (dev->device ==  PCI_DEVICE_ID_INTEL_82855PM_HB)
                       switch(dev->subsystem_device) {
                       case 0xC00C: /* Samsung P35 notebook */
                               asus_hides_smbus = 1;
                       }
        }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82845_HB,   asus_hides_smbus_hostbridge );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82845G_HB,  asus_hides_smbus_hostbridge );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82850_HB,   asus_hides_smbus_hostbridge );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82865_HB,   asus_hides_smbus_hostbridge );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_7205_0,     asus_hides_smbus_hostbridge );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82855PM_HB, asus_hides_smbus_hostbridge );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82855GM_HB, asus_hides_smbus_hostbridge );

static void __init asus_hides_smbus_lpc(struct pci_dev *dev)
{
        u16 val;
        
        if (likely(!asus_hides_smbus))
                return;

        pci_read_config_word(dev, 0xF2, &val);
        if (val & 0x8) {
                pci_write_config_word(dev, 0xF2, val & (~0x8));
                pci_read_config_word(dev, 0xF2, &val);
                if (val & 0x8)
                        printk(KERN_INFO "PCI: i801 SMBus device continues to play 'hide and seek'! 0x%x\n", val);
                else
                        printk(KERN_INFO "PCI: Enabled i801 SMBus device\n");
        }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82801DB_0,  asus_hides_smbus_lpc );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82801BA_0,  asus_hides_smbus_lpc );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82801CA_12, asus_hides_smbus_lpc );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82801DB_12, asus_hides_smbus_lpc );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82801EB_0,  asus_hides_smbus_lpc );

/*
 * SiS 96x south bridge: BIOS typically hides SMBus device...
 */
static void __init quirk_sis_96x_smbus(struct pci_dev *dev)
{
        u8 val = 0;
        printk(KERN_INFO "Enabling SiS 96x SMBus.\n");
        pci_read_config_byte(dev, 0x77, &val);
        pci_write_config_byte(dev, 0x77, val & ~0x10);
        pci_read_config_byte(dev, 0x77, &val);
}


#define UHCI_USBLEGSUP          0xc0            /* legacy support */
#define UHCI_USBCMD             0               /* command register */
#define UHCI_USBSTS             2               /* status register */
#define UHCI_USBINTR            4               /* interrupt register */
#define UHCI_USBLEGSUP_DEFAULT  0x2000          /* only PIRQ enable set */
#define UHCI_USBCMD_RUN         (1 << 0)        /* RUN/STOP bit */
#define UHCI_USBCMD_GRESET      (1 << 2)        /* Global reset */
#define UHCI_USBCMD_CONFIGURE   (1 << 6)        /* config semaphore */
#define UHCI_USBSTS_HALTED      (1 << 5)        /* HCHalted bit */

#define OHCI_CONTROL            0x04
#define OHCI_CMDSTATUS          0x08
#define OHCI_INTRSTATUS         0x0c
#define OHCI_INTRENABLE         0x10
#define OHCI_INTRDISABLE        0x14
#define OHCI_OCR                (1 << 3)        /* ownership change request */
#define OHCI_CTRL_IR            (1 << 8)        /* interrupt routing */
#define OHCI_INTR_OC            (1 << 30)       /* ownership change */

#define EHCI_HCC_PARAMS         0x08            /* extended capabilities */
#define EHCI_USBCMD             0               /* command register */
#define EHCI_USBCMD_RUN         (1 << 0)        /* RUN/STOP bit */
#define EHCI_USBSTS             4               /* status register */
#define EHCI_USBSTS_HALTED      (1 << 12)       /* HCHalted bit */
#define EHCI_USBINTR            8               /* interrupt register */
#define EHCI_USBLEGSUP          0               /* legacy support register */
#define EHCI_USBLEGSUP_BIOS     (1 << 16)       /* BIOS semaphore */
#define EHCI_USBLEGSUP_OS       (1 << 24)       /* OS semaphore */
#define EHCI_USBLEGCTLSTS       4               /* legacy control/status */
#define EHCI_USBLEGCTLSTS_SOOE  (1 << 13)       /* SMI on ownership change */

int usb_early_handoff __devinitdata = 0;
static int __init usb_handoff_early(char *str)
{
        usb_early_handoff = 1;
        return 0;
}
__setup("usb-handoff", usb_handoff_early);

static void __devinit quirk_usb_handoff_uhci(struct pci_dev *pdev)
{
        unsigned long base = 0;
        int wait_time, delta;
        u16 val, sts;
        int i;

        for (i = 0; i < PCI_ROM_RESOURCE; i++)
                if ((pci_resource_flags(pdev, i) & IORESOURCE_IO)) {
                        base = pci_resource_start(pdev, i);
                        break;
                }

        if (!base)
                return;

        /*
         * stop controller
         */
        sts = inw(base + UHCI_USBSTS);
        val = inw(base + UHCI_USBCMD);
        val &= ~(u16)(UHCI_USBCMD_RUN | UHCI_USBCMD_CONFIGURE);
        outw(val, base + UHCI_USBCMD);

        /*
         * wait while it stops if it was running
         */
        if ((sts & UHCI_USBSTS_HALTED) == 0)
        {
                wait_time = 1000;
                delta = 100;

                do {
                        outw(0x1f, base + UHCI_USBSTS);
                        udelay(delta);
                        wait_time -= delta;
                        val = inw(base + UHCI_USBSTS);
                        if (val & UHCI_USBSTS_HALTED)
                                break;
                } while (wait_time > 0);
        }

        /*
         * disable interrupts & legacy support
         */
        outw(0, base + UHCI_USBINTR);
        outw(0x1f, base + UHCI_USBSTS);
        pci_read_config_word(pdev, UHCI_USBLEGSUP, &val);
        if (val & 0xbf) 
                pci_write_config_word(pdev, UHCI_USBLEGSUP, UHCI_USBLEGSUP_DEFAULT);
                
}

static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev)
{
        void __iomem *base;
        int wait_time;

        base = ioremap_nocache(pci_resource_start(pdev, 0),
                                     pci_resource_len(pdev, 0));
        if (base == NULL) return;

        if (readl(base + OHCI_CONTROL) & OHCI_CTRL_IR) {
                wait_time = 500; /* 0.5 seconds */
                writel(OHCI_INTR_OC, base + OHCI_INTRENABLE);
                writel(OHCI_OCR, base + OHCI_CMDSTATUS);
                while (wait_time > 0 && 
                                readl(base + OHCI_CONTROL) & OHCI_CTRL_IR) {
                        wait_time -= 10;
                        msleep(10);
                }
        }

        /*
         * disable interrupts
         */
        writel(~(u32)0, base + OHCI_INTRDISABLE);
        writel(~(u32)0, base + OHCI_INTRSTATUS);

        iounmap(base);
}

static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev)
{
        int wait_time, delta;
        void __iomem *base, *op_reg_base;
        u32 hcc_params, val, temp;
        u8 cap_length;

        base = ioremap_nocache(pci_resource_start(pdev, 0),
                                pci_resource_len(pdev, 0));
        if (base == NULL) return;

        cap_length = readb(base);
        op_reg_base = base + cap_length;
        hcc_params = readl(base + EHCI_HCC_PARAMS);
        hcc_params = (hcc_params >> 8) & 0xff;
        if (hcc_params) {
                pci_read_config_dword(pdev, 
                                        hcc_params + EHCI_USBLEGSUP,
                                        &val);
                if (((val & 0xff) == 1) && (val & EHCI_USBLEGSUP_BIOS)) {
                        /*
                         * Ok, BIOS is in smm mode, try to hand off...
                         */
                        pci_read_config_dword(pdev,
                                                hcc_params + EHCI_USBLEGCTLSTS,
                                                &temp);
                        pci_write_config_dword(pdev,
                                                hcc_params + EHCI_USBLEGCTLSTS,
                                                temp | EHCI_USBLEGCTLSTS_SOOE);
                        val |= EHCI_USBLEGSUP_OS;
                        pci_write_config_dword(pdev, 
                                                hcc_params + EHCI_USBLEGSUP, 
                                                val);

                        wait_time = 500;
                        do {
                                msleep(10);
                                wait_time -= 10;
                                pci_read_config_dword(pdev,
                                                hcc_params + EHCI_USBLEGSUP,
                                                &val);
                        } while (wait_time && (val & EHCI_USBLEGSUP_BIOS));
                        if (!wait_time) {
                                /*
                                 * well, possibly buggy BIOS...
                                 */
                                printk(KERN_WARNING "EHCI early BIOS handoff "
                                                "failed (BIOS bug ?)\n");
                                pci_write_config_dword(pdev,
                                                hcc_params + EHCI_USBLEGSUP,
                                                EHCI_USBLEGSUP_OS);
                                pci_write_config_dword(pdev,
                                                hcc_params + EHCI_USBLEGCTLSTS,
                                                0);
                        }
                }
        }

        /*
         * halt EHCI & disable its interrupts in any case
         */
        val = readl(op_reg_base + EHCI_USBSTS);
        if ((val & EHCI_USBSTS_HALTED) == 0) {
                val = readl(op_reg_base + EHCI_USBCMD);
                val &= ~EHCI_USBCMD_RUN;
                writel(val, op_reg_base + EHCI_USBCMD);

                wait_time = 2000;
                delta = 100;
                do {
                        writel(0x3f, op_reg_base + EHCI_USBSTS);
                        udelay(delta);
                        wait_time -= delta;
                        val = readl(op_reg_base + EHCI_USBSTS);
                        if ((val == ~(u32)0) || (val & EHCI_USBSTS_HALTED)) {
                                break;
                        }
                } while (wait_time > 0);
        }
        writel(0, op_reg_base + EHCI_USBINTR);
        writel(0x3f, op_reg_base + EHCI_USBSTS);

        iounmap(base);

        return;
}



static void __devinit quirk_usb_early_handoff(struct pci_dev *pdev)
{
        if (!usb_early_handoff)
                return;

        if (pdev->class == ((PCI_CLASS_SERIAL_USB << 8) | 0x00)) { /* UHCI */
                quirk_usb_handoff_uhci(pdev);
        } else if (pdev->class == ((PCI_CLASS_SERIAL_USB << 8) | 0x10)) { /* OHCI */
                quirk_usb_handoff_ohci(pdev);
        } else if (pdev->class == ((PCI_CLASS_SERIAL_USB << 8) | 0x20)) { /* EHCI */
                quirk_usb_disable_ehci(pdev);
        }

        return;
}
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, quirk_usb_early_handoff);

/*
 * ... This is further complicated by the fact that some SiS96x south
 * bridges pretend to be 85C503/5513 instead.  In that case see if we
 * spotted a compatible north bridge to make sure.
 * (pci_find_device doesn't work yet)
 *
 * We can also enable the sis96x bit in the discovery register..
 */
static int __devinitdata sis_96x_compatible = 0;

#define SIS_DETECT_REGISTER 0x40

static void __init quirk_sis_503(struct pci_dev *dev)
{
        u8 reg;
        u16 devid;

        pci_read_config_byte(dev, SIS_DETECT_REGISTER, &reg);
        pci_write_config_byte(dev, SIS_DETECT_REGISTER, reg | (1 << 6));
        pci_read_config_word(dev, PCI_DEVICE_ID, &devid);
        if (((devid & 0xfff0) != 0x0960) && (devid != 0x0018)) {
                pci_write_config_byte(dev, SIS_DETECT_REGISTER, reg);
                return;
        }

        /* Make people aware that we changed the config.. */
        printk(KERN_WARNING "Uncovering SIS%x that hid as a SIS503 (compatible=%d)\n", devid, sis_96x_compatible);

        /*
         * Ok, it now shows up as a 96x.. The 96x quirks are after
         * the 503 quirk in the quirk table, so they'll automatically
         * run and enable things like the SMBus device
         */
        dev->device = devid;
}

static void __init quirk_sis_96x_compatible(struct pci_dev *dev)
{
        sis_96x_compatible = 1;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_645,           quirk_sis_96x_compatible );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_646,           quirk_sis_96x_compatible );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_648,           quirk_sis_96x_compatible );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_650,           quirk_sis_96x_compatible );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_651,           quirk_sis_96x_compatible );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_735,           quirk_sis_96x_compatible );

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_503,           quirk_sis_503 );

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_961,           quirk_sis_96x_smbus );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_962,           quirk_sis_96x_smbus );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_963,           quirk_sis_96x_smbus );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_LPC,           quirk_sis_96x_smbus );

#ifdef CONFIG_X86_IO_APIC
static void __init quirk_alder_ioapic(struct pci_dev *pdev)
{
        int i;

        if ((pdev->class >> 8) != 0xff00)
                return;

        /* the first BAR is the location of the IO APIC...we must
         * not touch this (and it's already covered by the fixmap), so
         * forcibly insert it into the resource tree */
        if (pci_resource_start(pdev, 0) && pci_resource_len(pdev, 0))
                insert_resource(&iomem_resource, &pdev->resource[0]);

        /* The next five BARs all seem to be rubbish, so just clean
         * them out */
        for (i=1; i < 6; i++) {
                memset(&pdev->resource[i], 0, sizeof(pdev->resource[i]));
        }

}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_EESSC,      quirk_alder_ioapic );
#endif

#ifdef CONFIG_SCSI_SATA
static void __devinit quirk_intel_ide_combined(struct pci_dev *pdev)
{
        u8 prog, comb, tmp;
        int ich = 0;

        /*
         * Narrow down to Intel SATA PCI devices.
         */
        switch (pdev->device) {
        /* PCI ids taken from drivers/scsi/ata_piix.c */
        case 0x24d1:
        case 0x24df:
        case 0x25a3:
        case 0x25b0:
                ich = 5;
                break;
        case 0x2651:
        case 0x2652:
        case 0x2653:
        case 0x2680:    /* ESB2 */
                ich = 6;
                break;
        case 0x27c0:
        case 0x27c4:
                ich = 7;
                break;
        default:
                /* we do not handle this PCI device */
                return;
        }

        /*
         * Read combined mode register.
         */
        pci_read_config_byte(pdev, 0x90, &tmp); /* combined mode reg */

        if (ich == 5) {
                tmp &= 0x6;  /* interesting bits 2:1, PATA primary/secondary */
                if (tmp == 0x4)         /* bits 10x */
                        comb = (1 << 0);        /* SATA port 0, PATA port 1 */
                else if (tmp == 0x6)    /* bits 11x */
                        comb = (1 << 2);        /* PATA port 0, SATA port 1 */
                else
                        return;                 /* not in combined mode */
        } else {
                WARN_ON((ich != 6) && (ich != 7));
                tmp &= 0x3;  /* interesting bits 1:0 */
                if (tmp & (1 << 0))
                        comb = (1 << 2);        /* PATA port 0, SATA port 1 */
                else if (tmp & (1 << 1))
                        comb = (1 << 0);        /* SATA port 0, PATA port 1 */
                else
                        return;                 /* not in combined mode */
        }

        /*
         * Read programming interface register.
         * (Tells us if it's legacy or native mode)
         */
        pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);

        /* if SATA port is in native mode, we're ok. */
        if (prog & comb)
                return;

        /* SATA port is in legacy mode.  Reserve port so that
         * IDE driver does not attempt to use it.  If request_region
         * fails, it will be obvious at boot time, so we don't bother
         * checking return values.
         */
        if (comb == (1 << 0))
                request_region(0x1f0, 8, "libata");     /* port 0 */
        else
                request_region(0x170, 8, "libata");     /* port 1 */
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_ANY_ID,       quirk_intel_ide_combined );
#endif /* CONFIG_SCSI_SATA */


int pcie_mch_quirk;

static void __devinit quirk_pcie_mch(struct pci_dev *pdev)
{
        pcie_mch_quirk = 1;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_E7520_MCH,  quirk_pcie_mch );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_E7320_MCH,  quirk_pcie_mch );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_E7525_MCH,  quirk_pcie_mch );

static void __devinit quirk_netmos(struct pci_dev *dev)
{
        unsigned int num_parallel = (dev->subsystem_device & 0xf0) >> 4;
        unsigned int num_serial = dev->subsystem_device & 0xf;

        /*
         * These Netmos parts are multiport serial devices with optional
         * parallel ports.  Even when parallel ports are present, they
         * are identified as class SERIAL, which means the serial driver
         * will claim them.  To prevent this, mark them as class OTHER.
         * These combo devices should be claimed by parport_serial.
         *
         * The subdevice ID is of the form 0x00PS, where <P> is the number
         * of parallel ports and <S> is the number of serial ports.
         */
        switch (dev->device) {
        case PCI_DEVICE_ID_NETMOS_9735:
        case PCI_DEVICE_ID_NETMOS_9745:
        case PCI_DEVICE_ID_NETMOS_9835:
        case PCI_DEVICE_ID_NETMOS_9845:
        case PCI_DEVICE_ID_NETMOS_9855:
                if ((dev->class >> 8) == PCI_CLASS_COMMUNICATION_SERIAL &&
                    num_parallel) {
                        printk(KERN_INFO "PCI: Netmos %04x (%u parallel, "
                                "%u serial); changing class SERIAL to OTHER "
                                "(use parport_serial)\n",
                                dev->device, num_parallel, num_serial);
                        dev->class = (PCI_CLASS_COMMUNICATION_OTHER << 8) |
                            (dev->class & 0xff);
                }
        }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETMOS, PCI_ANY_ID, quirk_netmos);

static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f, struct pci_fixup *end)
{
        while (f < end) {
                if ((f->vendor == dev->vendor || f->vendor == (u16) PCI_ANY_ID) &&
                    (f->device == dev->device || f->device == (u16) PCI_ANY_ID)) {
                        pr_debug("PCI: Calling quirk %p for %s\n", f->hook, pci_name(dev));
                        f->hook(dev);
                }
                f++;
        }
}

extern struct pci_fixup __start_pci_fixups_early[];
extern struct pci_fixup __end_pci_fixups_early[];
extern struct pci_fixup __start_pci_fixups_header[];
extern struct pci_fixup __end_pci_fixups_header[];
extern struct pci_fixup __start_pci_fixups_final[];
extern struct pci_fixup __end_pci_fixups_final[];
extern struct pci_fixup __start_pci_fixups_enable[];
extern struct pci_fixup __end_pci_fixups_enable[];


void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev)
{
        struct pci_fixup *start, *end;

        switch(pass) {
        case pci_fixup_early:
                start = __start_pci_fixups_early;
                end = __end_pci_fixups_early;
                break;

        case pci_fixup_header:
                start = __start_pci_fixups_header;
                end = __end_pci_fixups_header;
                break;

        case pci_fixup_final:
                start = __start_pci_fixups_final;
                end = __end_pci_fixups_final;
                break;

        case pci_fixup_enable:
                start = __start_pci_fixups_enable;
                end = __end_pci_fixups_enable;
                break;

        default:
                /* stupid compiler warning, you would think with an enum... */
                return;
        }
        pci_do_fixups(dev, start, end);
}

EXPORT_SYMBOL(pcie_mch_quirk);
#ifdef CONFIG_HOTPLUG
EXPORT_SYMBOL(pci_fixup_device);
#endif