From 4096ed0fc7c6ed83da44ab27ab7d1c7cd6e8e175 Mon Sep 17 00:00:00 2001 From: Mats Erik Andersson Date: Tue, 12 May 2009 12:05:23 +0200 Subject: PCI: expose SMBus on Asus notebook A6L Addition of one unknown subsystem identifier to the quirks handler for chipset i82855GM_HB on notebook Asus A6L. This exposes the otherwise hidden SMBus controller within the south bridge ICH4-M. Signed-off-by: Mats Erik Andersson Signed-off-by: Jesse Barnes --- drivers/pci/quirks.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/pci/quirks.c') diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 3067673d54f6..a778c84d04a9 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -1133,6 +1133,7 @@ static void __init asus_hides_smbus_hostbridge(struct pci_dev *dev) switch (dev->subsystem_device) { case 0x1751: /* M2N notebook */ case 0x1821: /* M5N notebook */ + case 0x1897: /* A6L notebook */ asus_hides_smbus = 1; } else if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB) -- cgit v1.2.1 From 26c56dc0c4fbdf3af12ebc48278f09ef65ddb4dd Mon Sep 17 00:00:00 2001 From: Michal Miroslaw Date: Tue, 12 May 2009 13:49:26 -0700 Subject: PCI quirk: unhide 'Overflow' device on i828{6,7}5P/PE chipsets Some BIOSes hide 'overflow' device (dev #6) for i82875P/PE chipsets. The same happens for i82865P/PE. Add a quirk to enable this device. This allows i82875 EDAC driver to bind to chipset's dev #6 and not dev #0 as the latter is used by AGP driver. On my laptop (i82865P based) ACPI code is disabling this device again in \_SB.PCI0._CRS method (called at least at PNP init time). This can be easily worked around by patching DSDT. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Michal Miroslaw Acked-by: Doug Thompson Signed-off-by: Andrew Morton Signed-off-by: Jesse Barnes --- drivers/pci/quirks.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'drivers/pci/quirks.c') diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index a778c84d04a9..15a8ab7ea911 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2017,6 +2017,28 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_NX2_5709S, quirk_brcm_570x_limit_vpd); +/* Originally in EDAC sources for i82875P: + * Intel tells BIOS developers to hide device 6 which + * configures the overflow device access containing + * the DRBs - this is where we expose device 6. + * http://www.x86-secret.com/articles/tweak/pat/patsecrets-2.htm + */ +static void __devinit quirk_unhide_mch_dev6(struct pci_dev *dev) +{ + u8 reg; + + if (pci_read_config_byte(dev, 0xF4, ®) == 0 && !(reg & 0x02)) { + dev_info(&dev->dev, "Enabling MCH 'Overflow' Device\n"); + pci_write_config_byte(dev, 0xF4, reg | 0x02); + } +} + +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82865_HB, + quirk_unhide_mch_dev6); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82875_HB, + quirk_unhide_mch_dev6); + + #ifdef CONFIG_PCI_MSI /* Some chipsets do not support MSI. We cannot easily rely on setting * PCI_BUS_FLAGS_NO_MSI in its bus flags because there are actually -- cgit v1.2.1 From 74c57428971d28863ec1804b1dd453930bbe1306 Mon Sep 17 00:00:00 2001 From: Michal Miroslaw Date: Tue, 12 May 2009 13:49:25 -0700 Subject: PCI quirk: HP hides SMBus controller in Compaq nx9500 laptops I found no references to SMBus in ACPI DSDT disassembly on my laptop so this should be safe. Signed-off-by: Michal Miroslaw Signed-off-by: Andrew Morton Signed-off-by: Jesse Barnes --- drivers/pci/quirks.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/pci/quirks.c') diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 15a8ab7ea911..47d62084d5b7 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -1164,6 +1164,7 @@ static void __init asus_hides_smbus_hostbridge(struct pci_dev *dev) switch (dev->subsystem_device) { case 0x12bc: /* HP D330L */ case 0x12bd: /* HP D530 */ + case 0x006a: /* HP Compaq nx9500 */ asus_hides_smbus = 1; } else if (dev->device == PCI_DEVICE_ID_INTEL_82875_HB) -- cgit v1.2.1