linux-kernel - [PATCH 1/3] Add quirk to disable boot interrupt generation on broadcom HT1000

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Date:	Tue,  8 Jul 2008 15:59:47 +0200
From:	Olaf Dabrunz <od@...e.de>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Jon Masters <jonathan@...masters.org>,
	Olaf Dabrunz <od@...e.de>, Stefan Assmann <sassmann@...e.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Ihno Krumreich <ihno@...e.de>,
	Sven Dietrich <sdietrich@...e.de>,
	Daniel Gollub <dgollub@...e.de>,
	Felix Foerster <ffoerster@...e.de>
Subject: [PATCH 1/3] Add quirk to disable boot interrupt generation on broadcom HT1000

From: Olaf Dabrunz <od@...e.de>

Signed-off-by: Olaf Dabrunz <od@...e.de>
Signed-off-by: Stefan Assmann <sassmann@...e.de>
---
 drivers/pci/quirks.c |   32 ++++++++++++++++++++++++++++++++
 1 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 292cf26..b3ec3f8 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1417,6 +1417,38 @@ static void quirk_disable_intel_boot_interrupt(struct pci_dev *dev)
 		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 */
 
 /*
-- 
1.5.2.4

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