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/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
  24 void __init pcibios_irq_init(void)
  25 {
  26 }
  27
  28 void __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
  44 void __init pcibios_penalize_isa_irq(int irq)
  45 {
  46 }
  47
  48 void pcibios_enable_irq(struct pci_dev *dev)
  49 {
  50         pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
  51 }