From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 arch/mips/pci/fixup-malta.c | 103 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 arch/mips/pci/fixup-malta.c

(limited to 'arch/mips/pci/fixup-malta.c')

diff --git a/arch/mips/pci/fixup-malta.c b/arch/mips/pci/fixup-malta.c
new file mode 100644
index 000000000000..b9296d9942b3
--- /dev/null
+++ b/arch/mips/pci/fixup-malta.c
@@ -0,0 +1,103 @@
+#include <linux/init.h>
+#include <linux/pci.h>
+
+/* PCI interrupt pins */
+#define PCIA		1
+#define PCIB		2
+#define PCIC		3
+#define PCID		4
+
+/* This table is filled in by interrogating the PIIX4 chip */
+static char pci_irq[5] __initdata;
+
+static char irq_tab[][5] __initdata = {
+	/*      INTA    INTB    INTC    INTD */
+	{0,	0,	0,	0,	0 },	/*  0: GT64120 PCI bridge */
+	{0,	0,	0,	0,	0 },	/*  1: Unused */
+	{0,	0,	0,	0,	0 },	/*  2: Unused */
+	{0,	0,	0,	0,	0 },	/*  3: Unused */
+	{0,	0,	0,	0,	0 },	/*  4: Unused */
+	{0,	0,	0,	0,	0 },	/*  5: Unused */
+	{0,	0,	0,	0,	0 },	/*  6: Unused */
+	{0,	0,	0,	0,	0 },	/*  7: Unused */
+	{0,	0,	0,	0,	0 },	/*  8: Unused */
+	{0,	0,	0,	0,	0 },	/*  9: Unused */
+	{0,	0,	0,	0,	PCID },	/* 10: PIIX4 USB */
+	{0,	PCIB,	0,	0,	0 },	/* 11: AMD 79C973 Ethernet */
+	{0,	PCIC,	0,	0,	0 },	/* 12: Crystal 4281 Sound */
+	{0,	0,	0,	0,	0 },	/* 13: Unused */
+	{0,	0,	0,	0,	0 },	/* 14: Unused */
+	{0,	0,	0,	0,	0 },	/* 15: Unused */
+	{0,	0,	0,	0,	0 },	/* 16: Unused */
+	{0,	0,	0,	0,	0 },	/* 17: Bonito/SOC-it PCI Bridge*/
+	{0,	PCIA,	PCIB,	PCIC,	PCID },	/* 18: PCI Slot 1 */
+	{0,	PCIB,	PCIC,	PCID,	PCIA },	/* 19: PCI Slot 2 */
+	{0,	PCIC,	PCID,	PCIA,	PCIB },	/* 20: PCI Slot 3 */
+	{0,	PCID,	PCIA,	PCIB,	PCIC }	/* 21: PCI Slot 4 */
+};
+
+int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+	int virq;
+	virq = irq_tab[slot][pin];
+	return pci_irq[virq];
+}
+
+/* Do platform specific device initialization at pci_enable_device() time */
+int pcibios_plat_dev_init(struct pci_dev *dev)
+{
+	return 0;
+}
+
+static void __init malta_piix_func0_fixup(struct pci_dev *pdev)
+{
+	unsigned char reg_val;
+	static int piixirqmap[16] __initdata = {  /* PIIX PIRQC[A:D] irq mappings */
+		0,  0, 	0,  3,
+		4,  5,  6,  7,
+		0,  9, 10, 11,
+		12, 0, 14, 15 
+	};
+	int i;
+
+	/* Interrogate PIIX4 to get PCI IRQ mapping */
+	for (i = 0; i <= 3; i++) {
+		pci_read_config_byte(pdev, 0x60+i, &reg_val);
+		if (reg_val & 0x80)
+			pci_irq[PCIA+i] = 0;	/* Disabled */
+		else
+			pci_irq[PCIA+i] = piixirqmap[reg_val & 15];
+	}
+
+	/* Done by YAMON 2.00 onwards */
+	if (PCI_SLOT(pdev->devfn) == 10) {
+		/*
+		 * Set top of main memory accessible by ISA or DMA
+		 * devices to 16 Mb.
+		 */
+		pci_read_config_byte(pdev, 0x69, &reg_val);
+		pci_write_config_byte(pdev, 0x69, reg_val | 0xf0);
+	}
+}
+
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0,
+	 malta_piix_func0_fixup);
+
+static void __init malta_piix_func1_fixup(struct pci_dev *pdev)
+{
+	unsigned char reg_val;
+
+	/* Done by YAMON 2.02 onwards */
+	if (PCI_SLOT(pdev->devfn) == 10) {
+		/*
+		 * IDE Decode enable.
+		 */
+		pci_read_config_byte(pdev, 0x41, &reg_val);
+		pci_write_config_byte(pdev, 0x41, reg_val|0x80);
+		pci_read_config_byte(pdev, 0x43, &reg_val);
+		pci_write_config_byte(pdev, 0x43, reg_val|0x80);
+	}
+}
+
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB,
+	 malta_piix_func1_fixup);
-- 
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