arch/arm/mach-footbridge/ebsa285-pci.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * linux/arch/arm/mach-footbridge/ebsa285-pci.c
   4  *
   5  * PCI bios-type initialisation for PCI machines
   6  *
   7  * Bits taken from various places.
   8  */
   9 #include <linux/kernel.h>
  10 #include <linux/pci.h>
  11 #include <linux/init.h>
  12
  13 #include <asm/irq.h>
  14 #include <asm/mach/pci.h>
  15 #include <asm/mach-types.h>
  16
  17 static int irqmap_ebsa285[] = { IRQ_IN3, IRQ_IN1, IRQ_IN0, IRQ_PCI };
  18
  19 static int ebsa285_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  20 {
  21         if (dev->vendor == PCI_VENDOR_ID_CONTAQ &&
  22             dev->device == PCI_DEVICE_ID_CONTAQ_82C693)
  23                 switch (PCI_FUNC(dev->devfn)) {
  24                 case 1: return 14;
  25                 case 2: return 15;
  26                 case 3: return 12;
  27                 }
  28
  29         return irqmap_ebsa285[(slot + pin) & 3];
  30 }
  31
  32 static struct hw_pci ebsa285_pci __initdata = {
  33         .map_irq                = ebsa285_map_irq,
  34         .nr_controllers         = 1,
  35         .ops                    = &dc21285_ops,
  36         .setup                  = dc21285_setup,
  37         .preinit                = dc21285_preinit,
  38         .postinit               = dc21285_postinit,
  39 };
  40
  41 static int __init ebsa285_init_pci(void)
  42 {
  43         if (machine_is_ebsa285())
  44                 pci_common_init(&ebsa285_pci);
  45         return 0;
  46 }
  47
  48 subsys_initcall(ebsa285_init_pci);