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linux/arch/i386/pci/fixup.c
Auke Kok 44c10138fd PCI: Change all drivers to use pci_device->revision 
Instead of all drivers reading pci config space to get the revision
ID, they can now use the pci_device->revision member.

This exposes some issues where drivers where reading a word or a dword
for the revision number, and adding useless error-handling around the
read. Some drivers even just read it for no purpose of all.

In devices where the revision ID is being copied over and used in what
appears to be the equivalent of hotpath, I have left the copy code
and the cached copy as not to influence the driver's performance.

Compile tested with make all{yes,mod}config on x86_64 and i386.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11 16:02:10 -07:00

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/*
* Exceptions for specific devices. Usually work-arounds for fatal design flaws.
*/
#include <linux/delay.h>
#include <linux/dmi.h>
#include <linux/pci.h>
#include <linux/init.h>
#include "pci.h"
static void __devinit pci_fixup_i450nx(struct pci_dev *d)
{
/*
* i450NX -- Find and scan all secondary buses on all PXB's.
*/
int pxb, reg;
u8 busno, suba, subb;
printk(KERN_WARNING "PCI: Searching for i450NX host bridges on %s\n", pci_name(d));
reg = 0xd0;
for(pxb=0; pxb<2; pxb++) {
pci_read_config_byte(d, reg++, &busno);
pci_read_config_byte(d, reg++, &suba);
pci_read_config_byte(d, reg++, &subb);
DBG("i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno, suba, subb);
if (busno)
pci_scan_bus(busno, &pci_root_ops, NULL); /* Bus A */
if (suba < subb)
pci_scan_bus(suba+1, &pci_root_ops, NULL); /* Bus B */
}
pcibios_last_bus = -1;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
static void __devinit pci_fixup_i450gx(struct pci_dev *d)
{
/*
* i450GX and i450KX -- Find and scan all secondary buses.
* (called separately for each PCI bridge found)
*/
u8 busno;
pci_read_config_byte(d, 0x4a, &busno);
printk(KERN_INFO "PCI: i440KX/GX host bridge %s: secondary bus %02x\n", pci_name(d), busno);
pci_scan_bus(busno, &pci_root_ops, NULL);
pcibios_last_bus = -1;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx);
static void __devinit pci_fixup_umc_ide(struct pci_dev *d)
{
/*
* UM8886BF IDE controller sets region type bits incorrectly,
* therefore they look like memory despite of them being I/O.
*/
int i;
printk(KERN_WARNING "PCI: Fixing base address flags for device %s\n", pci_name(d));
for(i=0; i<4; i++)
d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide);
static void __devinit pci_fixup_ncr53c810(struct pci_dev *d)
{
/*
* NCR 53C810 returns class code 0 (at least on some systems).
* Fix class to be PCI_CLASS_STORAGE_SCSI
*/
if (!d->class) {
printk(KERN_WARNING "PCI: fixing NCR 53C810 class code for %s\n", pci_name(d));
d->class = PCI_CLASS_STORAGE_SCSI << 8;
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, pci_fixup_ncr53c810);
static void __devinit pci_fixup_latency(struct pci_dev *d)
{
/*
* SiS 5597 and 5598 chipsets require latency timer set to
* at most 32 to avoid lockups.
*/
DBG("PCI: Setting max latency to 32\n");
pcibios_max_latency = 32;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency);
static void __devinit pci_fixup_piix4_acpi(struct pci_dev *d)
{
/*
* PIIX4 ACPI device: hardwired IRQ9
*/
d->irq = 9;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi);
/*
* Addresses issues with problems in the memory write queue timer in
* certain VIA Northbridges. This bugfix is per VIA's specifications,
* except for the KL133/KM133: clearing bit 5 on those Northbridges seems
* to trigger a bug in its integrated ProSavage video card, which
* causes screen corruption. We only clear bits 6 and 7 for that chipset,
* until VIA can provide us with definitive information on why screen
* corruption occurs, and what exactly those bits do.
*
* VIA 8363,8622,8361 Northbridges:
* - bits 5, 6, 7 at offset 0x55 need to be turned off
* VIA 8367 (KT266x) Northbridges:
* - bits 5, 6, 7 at offset 0x95 need to be turned off
* VIA 8363 rev 0x81/0x84 (KL133/KM133) Northbridges:
* - bits 6, 7 at offset 0x55 need to be turned off
*/
#define VIA_8363_KL133_REVISION_ID 0x81
#define VIA_8363_KM133_REVISION_ID 0x84
static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
{
u8 v;
int where = 0x55;
int mask = 0x1f; /* clear bits 5, 6, 7 by default */
if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
/* fix pci bus latency issues resulted by NB bios error
it appears on bug free^Wreduced kt266x's bios forces
NB latency to zero */
pci_write_config_byte(d, PCI_LATENCY_TIMER, 0);
where = 0x95; /* the memory write queue timer register is
different for the KT266x's: 0x95 not 0x55 */
} else if (d->device == PCI_DEVICE_ID_VIA_8363_0 &&
(d->revision == VIA_8363_KL133_REVISION_ID ||
d->revision == VIA_8363_KM133_REVISION_ID)) {
mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5
causes screen corruption on the KL133/KM133 */
}
pci_read_config_byte(d, where, &v);
if (v & ~mask) {
printk(KERN_WARNING "Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x\n", \
d->device, d->revision, where, v, mask, v & mask);
v &= mask;
pci_write_config_byte(d, where, v);
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
/*
* For some reasons Intel decided that certain parts of their
* 815, 845 and some other chipsets must look like PCI-to-PCI bridges
* while they are obviously not. The 82801 family (AA, AB, BAM/CAM,
* BA/CA/DB and E) PCI bridges are actually HUB-to-PCI ones, according
* to Intel terminology. These devices do forward all addresses from
* system to PCI bus no matter what are their window settings, so they are
* "transparent" (or subtractive decoding) from programmers point of view.
*/
static void __devinit pci_fixup_transparent_bridge(struct pci_dev *dev)
{
if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI &&
(dev->device & 0xff00) == 0x2400)
dev->transparent = 1;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_fixup_transparent_bridge);
/*
* Fixup for C1 Halt Disconnect problem on nForce2 systems.
*
* From information provided by "Allen Martin" <AMartin@nvidia.com>:
*
* A hang is caused when the CPU generates a very fast CONNECT/HALT cycle
* sequence. Workaround is to set the SYSTEM_IDLE_TIMEOUT to 80 ns.
* This allows the state-machine and timer to return to a proper state within
* 80 ns of the CONNECT and probe appearing together. Since the CPU will not
* issue another HALT within 80 ns of the initial HALT, the failure condition
* is avoided.
*/
static void pci_fixup_nforce2(struct pci_dev *dev)
{
u32 val;
/*
* Chip Old value New value
* C17 0x1F0FFF01 0x1F01FF01
* C18D 0x9F0FFF01 0x9F01FF01
*
* Northbridge chip version may be determined by
* reading the PCI revision ID (0xC1 or greater is C18D).
*/
pci_read_config_dword(dev, 0x6c, &val);
/*
* Apply fixup if needed, but don't touch disconnect state
*/
if ((val & 0x00FF0000) != 0x00010000) {
printk(KERN_WARNING "PCI: nForce2 C1 Halt Disconnect fixup\n");
pci_write_config_dword(dev, 0x6c, (val & 0xFF00FFFF) | 0x00010000);
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
/* Max PCI Express root ports */
#define MAX_PCIEROOT 6
static int quirk_aspm_offset[MAX_PCIEROOT << 3];
#define GET_INDEX(a, b) ((((a) - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + ((b) & 7))
static int quirk_pcie_aspm_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
{
return raw_pci_ops->read(0, bus->number, devfn, where, size, value);
}
/*
* Replace the original pci bus ops for write with a new one that will filter
* the request to insure ASPM cannot be enabled.
*/
static int quirk_pcie_aspm_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
{
u8 offset;
offset = quirk_aspm_offset[GET_INDEX(bus->self->device, devfn)];
if ((offset) && (where == offset))
value = value & 0xfffffffc;
return raw_pci_ops->write(0, bus->number, devfn, where, size, value);
}
static struct pci_ops quirk_pcie_aspm_ops = {
.read = quirk_pcie_aspm_read,
.write = quirk_pcie_aspm_write,
};
/*
* Prevents PCI Express ASPM (Active State Power Management) being enabled.
*
* Save the register offset, where the ASPM control bits are located,
* for each PCI Express device that is in the device list of
* the root port in an array for fast indexing. Replace the bus ops
* with the modified one.
*/
static void pcie_rootport_aspm_quirk(struct pci_dev *pdev)
{
int cap_base, i;
struct pci_bus *pbus;
struct pci_dev *dev;
if ((pbus = pdev->subordinate) == NULL)
return;
/*
* Check if the DID of pdev matches one of the six root ports. This
* check is needed in the case this function is called directly by the
* hot-plug driver.
*/
if ((pdev->device < PCI_DEVICE_ID_INTEL_MCH_PA) ||
(pdev->device > PCI_DEVICE_ID_INTEL_MCH_PC1))
return;
if (list_empty(&pbus->devices)) {
/*
* If no device is attached to the root port at power-up or
* after hot-remove, the pbus->devices is empty and this code
* will set the offsets to zero and the bus ops to parent's bus
* ops, which is unmodified.
*/
for (i= GET_INDEX(pdev->device, 0); i <= GET_INDEX(pdev->device, 7); ++i)
quirk_aspm_offset[i] = 0;
pbus->ops = pbus->parent->ops;
} else {
/*
* If devices are attached to the root port at power-up or
* after hot-add, the code loops through the device list of
* each root port to save the register offsets and replace the
* bus ops.
*/
list_for_each_entry(dev, &pbus->devices, bus_list) {
/* There are 0 to 8 devices attached to this bus */
cap_base = pci_find_capability(dev, PCI_CAP_ID_EXP);
quirk_aspm_offset[GET_INDEX(pdev->device, dev->devfn)]= cap_base + 0x10;
}
pbus->ops = &quirk_pcie_aspm_ops;
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA, pcie_rootport_aspm_quirk );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA1, pcie_rootport_aspm_quirk );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB, pcie_rootport_aspm_quirk );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB1, pcie_rootport_aspm_quirk );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC, pcie_rootport_aspm_quirk );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC1, pcie_rootport_aspm_quirk );
/*
* Fixup to mark boot BIOS video selected by BIOS before it changes
*
* From information provided by "Jon Smirl" <jonsmirl@gmail.com>
*
* The standard boot ROM sequence for an x86 machine uses the BIOS
* to select an initial video card for boot display. This boot video
* card will have it's BIOS copied to C0000 in system RAM.
* IORESOURCE_ROM_SHADOW is used to associate the boot video
* card with this copy. On laptops this copy has to be used since
* the main ROM may be compressed or combined with another image.
* See pci_map_rom() for use of this flag. IORESOURCE_ROM_SHADOW
* is marked here since the boot video device will be the only enabled
* video device at this point.
*/
static void __devinit pci_fixup_video(struct pci_dev *pdev)
{
struct pci_dev *bridge;
struct pci_bus *bus;
u16 config;
if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
return;
/* Is VGA routed to us? */
bus = pdev->bus;
while (bus) {
bridge = bus->self;
/*
* From information provided by
* "David Miller" <davem@davemloft.net>
* The bridge control register is valid for PCI header
* type BRIDGE, or CARDBUS. Host to PCI controllers use
* PCI header type NORMAL.
*/
if (bridge
&&((bridge->hdr_type == PCI_HEADER_TYPE_BRIDGE)
||(bridge->hdr_type == PCI_HEADER_TYPE_CARDBUS))) {
pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
&config);
if (!(config & PCI_BRIDGE_CTL_VGA))
return;
}
bus = bus->parent;
}
pci_read_config_word(pdev, PCI_COMMAND, &config);
if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
printk(KERN_DEBUG "Boot video device is %s\n", pci_name(pdev));
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_video);
/*
* Some Toshiba laptops need extra code to enable their TI TSB43AB22/A.
*
* We pretend to bring them out of full D3 state, and restore the proper
* IRQ, PCI cache line size, and BARs, otherwise the device won't function
* properly. In some cases, the device will generate an interrupt on
* the wrong IRQ line, causing any devices sharing the line it's
* *supposed* to use to be disabled by the kernel's IRQ debug code.
*/
static u16 toshiba_line_size;
static struct dmi_system_id __devinitdata toshiba_ohci1394_dmi_table[] = {
{
.ident = "Toshiba PS5 based laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_VERSION, "PS5"),
},
},
{
.ident = "Toshiba PSM4 based laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_VERSION, "PSM4"),
},
},
{
.ident = "Toshiba A40 based laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_VERSION, "PSA40U"),
},
},
{ }
};
static void __devinit pci_pre_fixup_toshiba_ohci1394(struct pci_dev *dev)
{
if (!dmi_check_system(toshiba_ohci1394_dmi_table))
return; /* only applies to certain Toshibas (so far) */
dev->current_state = PCI_D3cold;
pci_read_config_word(dev, PCI_CACHE_LINE_SIZE, &toshiba_line_size);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0x8032,
pci_pre_fixup_toshiba_ohci1394);
static void __devinit pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev)
{
if (!dmi_check_system(toshiba_ohci1394_dmi_table))
return; /* only applies to certain Toshibas (so far) */
/* Restore config space on Toshiba laptops */
pci_write_config_word(dev, PCI_CACHE_LINE_SIZE, toshiba_line_size);
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, (u8 *)&dev->irq);
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0,
pci_resource_start(dev, 0));
pci_write_config_dword(dev, PCI_BASE_ADDRESS_1,
pci_resource_start(dev, 1));
}
DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032,
pci_post_fixup_toshiba_ohci1394);
/*
* Prevent the BIOS trapping accesses to the Cyrix CS5530A video device
* configuration space.
*/
static void pci_early_fixup_cyrix_5530(struct pci_dev *dev)
{
u8 r;
/* clear 'F4 Video Configuration Trap' bit */
pci_read_config_byte(dev, 0x42, &r);
r &= 0xfd;
pci_write_config_byte(dev, 0x42, r);
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
pci_early_fixup_cyrix_5530);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
pci_early_fixup_cyrix_5530);
/*
* Siemens Nixdorf AG FSC Multiprocessor Interrupt Controller:
* prevent update of the BAR0, which doesn't look like a normal BAR.
*/
static void __devinit pci_siemens_interrupt_controller(struct pci_dev *dev)
{
dev->resource[0].flags |= IORESOURCE_PCI_FIXED;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015,
pci_siemens_interrupt_controller);
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