arch/i386/pci/acpi.c

   1 #include <linux/pci.h>
   2 #include <linux/acpi.h>
   3 #include <linux/init.h>
   4 #include <linux/irq.h>
   5 #include <asm/hw_irq.h>
   6 #include "pci.h"
   7
   8 struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
   9 {
  10         if (domain != 0) {
  11                 printk(KERN_WARNING "PCI: Multiple domains not supported\n");
  12                 return NULL;
  13         }
  14
  15         return pcibios_scan_root(busnum);
  16 }
  17
  18 extern int pci_routeirq;
  19 static int __init pci_acpi_init(void)
  20 {
  21         struct pci_dev *dev = NULL;
  22
  23         if (pcibios_scanned)
  24                 return 0;
  25
  26         if (acpi_noirq)
  27                 return 0;
  28
  29         printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
  30         acpi_irq_penalty_init();
  31         pcibios_scanned++;
  32         pcibios_enable_irq = acpi_pci_irq_enable;
  33         pcibios_disable_irq = acpi_pci_irq_disable;
  34
  35         if (pci_routeirq) {
  36                 /*
  37                  * PCI IRQ routing is set up by pci_enable_device(), but we
  38                  * also do it here in case there are still broken drivers that
  39                  * don't use pci_enable_device().
  40                  */
  41                 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
  42                 while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL)
  43                         acpi_pci_irq_enable(dev);
  44         } else
  45                 printk(KERN_INFO "PCI: If a device doesn't work, try \"pci=routeirq\".  If it helps, post a report\n");
  46
  47 #ifdef CONFIG_X86_IO_APIC
  48         if (acpi_ioapic)
  49                 print_IO_APIC();
  50 #endif
  51
  52         return 0;
  53 }
  54 subsys_initcall(pci_acpi_init);