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