linux/arch/mn10300/unit-asb2305/pci-irq.c
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   1/* PCI IRQ routing on the MN103E010 based ASB2305
   2 *
   3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public Licence
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the Licence, or (at your option) any later version.
  10 *
  11 * This is simple: All PCI interrupts route through the CPU's XIRQ1 pin [IRQ 35]
  12 */
  13#include <linux/types.h>
  14#include <linux/kernel.h>
  15#include <linux/pci.h>
  16#include <linux/init.h>
  17#include <linux/slab.h>
  18#include <linux/interrupt.h>
  19#include <linux/irq.h>
  20#include <asm/io.h>
  21#include <asm/smp.h>
  22#include "pci-asb2305.h"
  23
  24void __init pcibios_irq_init(void)
  25{
  26}
  27
  28void __init pcibios_fixup_irqs(void)
  29{
  30        struct pci_dev *dev = NULL;
  31        u8 line, pin;
  32
  33        while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
  34                pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
  35                if (pin) {
  36                        dev->irq = XIRQ1;
  37                        pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
  38                                              dev->irq);
  39                }
  40                pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
  41        }
  42}
  43
  44void __init pcibios_penalize_isa_irq(int irq)
  45{
  46}
  47
  48void pcibios_enable_irq(struct pci_dev *dev)
  49{
  50        pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
  51}
  52