LXR linux/arch/mn10300/unit-asb2305/pci-irq.c

   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/interrupt.h>
  18#include <linux/irq.h>
  19#include <asm/io.h>
  20#include <asm/smp.h>
  21#include "pci-asb2305.h"
  22
  23void __init pcibios_irq_init(void)
  24{
  25}
  26
  27void __init pcibios_fixup_irqs(void)
  28{
  29        struct pci_dev *dev = NULL;
  30        u8 line, pin;
  31
  32        for_each_pci_dev(dev) {
  33                pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
  34                if (pin) {
  35                        dev->irq = XIRQ1;
  36                        pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
  37                                              dev->irq);
  38                }
  39                pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
  40        }
  41}
  42
  43void pcibios_enable_irq(struct pci_dev *dev)
  44{
  45        pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
  46}
  47