Initial import

1 files changed, 61 insertions, 0 deletions

diff --git a/arch/frv/mb93090-mb00/pci-irq.c b/arch/frv/mb93090-mb00/pci-irq.c
new file mode 100644
index 000000000..1c35c93f9
--- /dev/null
+++ b/arch/frv/mb93090-mb00/pci-irq.c
@@ -0,0 +1,61 @@
+/* pci-irq.c: PCI IRQ routing on the FRV motherboard
+ *
+ * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ * derived from: arch/i386/kernel/pci-irq.c: (c) 1999--2000 Martin Mares <mj@suse.cz>
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+#include <asm/io.h>
+#include <asm/smp.h>
+
+#include "pci-frv.h"
+
+/*
+ *	DEVICE	DEVNO	INT#A	INT#B	INT#C	INT#D
+ *	=======	=======	=======	=======	=======	=======
+ *	MB86943	0	fpga.10	-	-	-
+ *	RTL8029	16	fpga.12	-	-	-
+ *	SLOT 1	19	fpga.6	fpga.5	fpga.4	fpga.3
+ *	SLOT 2	18	fpga.5	fpga.4	fpga.3	fpga.6
+ *	SLOT 3	17	fpga.4	fpga.3	fpga.6	fpga.5
+ *
+ */
+
+static const uint8_t __initconst pci_bus0_irq_routing[32][4] = {
+	[0 ] = { IRQ_FPGA_MB86943_PCI_INTA },
+	[16] = { IRQ_FPGA_RTL8029_INTA },
+	[17] = { IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB },
+	[18] = { IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA },
+	[19] = { IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD },
+};
+
+void __init pcibios_irq_init(void)
+{
+}
+
+void __init pcibios_fixup_irqs(void)
+{
+	struct pci_dev *dev = NULL;
+	uint8_t line, pin;
+
+	for_each_pci_dev(dev) {
+		pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+		if (pin) {
+			dev->irq = pci_bus0_irq_routing[PCI_SLOT(dev->devfn)][pin - 1];
+			pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
+		}
+		pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
+	}
+}
+
+void pcibios_enable_irq(struct pci_dev *dev)
+{
+	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
+}