PCI quirks: add quirk to disable boot interrupt generation on broadcom HT1000

[deliverable/linux.git] / drivers / pci / quirks.c

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 338a3f94b4d43bdf3d44dd0548e018199a49774a..d1f0281279c3e939b7070ff6243477edb3a4fb3b 100644 (file)
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1363,6 +1363,94 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,     0x2609, quirk_intel_pcie_pm);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,   0x260a, quirk_intel_pcie_pm);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,   0x260b, quirk_intel_pcie_pm);
 
+#ifdef CONFIG_X86_IO_APIC
+/*
+ * Boot interrupts on some chipsets cannot be turned off. For these chipsets,
+ * remap the original interrupt in the linux kernel to the boot interrupt, so
+ * that a PCI device's interrupt handler is installed on the boot interrupt
+ * line instead.
+ */
+static void quirk_reroute_to_boot_interrupts_intel(struct pci_dev *dev)
+{
+       if (noioapicquirk)
+               return;
+
+       dev->irq_reroute_variant = INTEL_IRQ_REROUTE_VARIANT;
+
+       printk(KERN_INFO "PCI quirk: reroute interrupts for 0x%04x:0x%04x\n",
+                       dev->vendor, dev->device);
+       return;
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_80333_0,    quirk_reroute_to_boot_interrupts_intel);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_80333_1,    quirk_reroute_to_boot_interrupts_intel);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_ESB2_0,     quirk_reroute_to_boot_interrupts_intel);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_PXH_0,      quirk_reroute_to_boot_interrupts_intel);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_PXH_1,      quirk_reroute_to_boot_interrupts_intel);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_PXHV,       quirk_reroute_to_boot_interrupts_intel);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_80332_0,    quirk_reroute_to_boot_interrupts_intel);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_80332_1,    quirk_reroute_to_boot_interrupts_intel);
+
+/*
+ * On some chipsets we can disable the generation of legacy INTx boot
+ * interrupts.
+ */
+
+/*
+ * IO-APIC1 on 6300ESB generates boot interrupts, see intel order no
+ * 300641-004US, section 5.7.3.
+ */
+#define INTEL_6300_IOAPIC_ABAR         0x40
+#define INTEL_6300_DISABLE_BOOT_IRQ    (1<<14)
+
+static void quirk_disable_intel_boot_interrupt(struct pci_dev *dev)
+{
+       u16 pci_config_word;
+
+       if (noioapicquirk)
+               return;
+
+       pci_read_config_word(dev, INTEL_6300_IOAPIC_ABAR, &pci_config_word);
+       pci_config_word |= INTEL_6300_DISABLE_BOOT_IRQ;
+       pci_write_config_word(dev, INTEL_6300_IOAPIC_ABAR, pci_config_word);
+
+       printk(KERN_INFO "disabled boot interrupt on device 0x%04x:0x%04x\n",
+               dev->vendor, dev->device);
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_ESB_10,     quirk_disable_intel_boot_interrupt);
+
+/*
+ * disable boot interrupts on HT-1000
+ */
+#define BC_HT1000_FEATURE_REG          0x64
+#define BC_HT1000_PIC_REGS_ENABLE      (1<<0)
+#define BC_HT1000_MAP_IDX              0xC00
+#define BC_HT1000_MAP_DATA             0xC01
+
+static void quirk_disable_broadcom_boot_interrupt(struct pci_dev *dev)
+{
+       u32 pci_config_dword;
+       u8 irq;
+
+       if (noioapicquirk)
+               return;
+
+       pci_read_config_dword(dev, BC_HT1000_FEATURE_REG, &pci_config_dword);
+       pci_write_config_dword(dev, BC_HT1000_FEATURE_REG, pci_config_dword |
+                       BC_HT1000_PIC_REGS_ENABLE);
+
+       for (irq = 0x10; irq < 0x10 + 32; irq++) {
+               outb(irq, BC_HT1000_MAP_IDX);
+               outb(0x00, BC_HT1000_MAP_DATA);
+       }
+
+       pci_write_config_dword(dev, BC_HT1000_FEATURE_REG, pci_config_dword);
+
+       printk(KERN_INFO "disabled boot interrupts on PCI device"
+                       "0x%04x:0x%04x\n", dev->vendor, dev->device);
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS,   PCI_DEVICE_ID_SERVERWORKS_HT1000SB,       quirk_disable_broadcom_boot_interrupt);
+#endif /* CONFIG_X86_IO_APIC */
+
 /*
  * Toshiba TC86C001 IDE controller reports the standard 8-byte BAR0 size
  * but the PIO transfers won't work if BAR0 falls at the odd 8 bytes.