arch/arm/mach-ixp4xx/nas100d-pci.c

   1 /*
   2  * arch/arm/mach-ixp4xx/nas100d-pci.c
   3  *
   4  * NAS 100d board-level PCI initialization
   5  *
   6  * based on ixdp425-pci.c:
   7  *      Copyright (C) 2002 Intel Corporation.
   8  *      Copyright (C) 2003-2004 MontaVista Software, Inc.
   9  *
  10  * Maintainer: http://www.nslu2-linux.org/
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  *
  16  */
  17
  18 #include <linux/pci.h>
  19 #include <linux/init.h>
  20 #include <linux/irq.h>
  21
  22 #include <asm/mach/pci.h>
  23 #include <asm/mach-types.h>
  24
  25 void __init nas100d_pci_preinit(void)
  26 {
  27         set_irq_type(IRQ_NAS100D_PCI_INTA, IRQ_TYPE_LEVEL_LOW);
  28         set_irq_type(IRQ_NAS100D_PCI_INTB, IRQ_TYPE_LEVEL_LOW);
  29         set_irq_type(IRQ_NAS100D_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
  30         set_irq_type(IRQ_NAS100D_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
  31         set_irq_type(IRQ_NAS100D_PCI_INTE, IRQ_TYPE_LEVEL_LOW);
  32
  33         ixp4xx_pci_preinit();
  34 }
  35
  36 static int __init nas100d_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  37 {
  38         static int pci_irq_table[NAS100D_PCI_MAX_DEV][NAS100D_PCI_IRQ_LINES] =
  39         {
  40                 { IRQ_NAS100D_PCI_INTA, -1, -1 },
  41                 { IRQ_NAS100D_PCI_INTB, -1, -1 },
  42                 { IRQ_NAS100D_PCI_INTC, IRQ_NAS100D_PCI_INTD, IRQ_NAS100D_PCI_INTE },
  43         };
  44
  45         int irq = -1;
  46
  47         if (slot >= 1 && slot <= NAS100D_PCI_MAX_DEV &&
  48                 pin >= 1 && pin <= NAS100D_PCI_IRQ_LINES)
  49                 irq = pci_irq_table[slot-1][pin-1];
  50
  51         return irq;
  52 }
  53
  54 struct hw_pci __initdata nas100d_pci = {
  55         .nr_controllers = 1,
  56         .preinit        = nas100d_pci_preinit,
  57         .swizzle        = pci_std_swizzle,
  58         .setup          = ixp4xx_setup,
  59         .scan           = ixp4xx_scan_bus,
  60         .map_irq        = nas100d_map_irq,
  61 };
  62
  63 int __init nas100d_pci_init(void)
  64 {
  65         if (machine_is_nas100d())
  66                 pci_common_init(&nas100d_pci);
  67
  68         return 0;
  69 }
  70
  71 subsys_initcall(nas100d_pci_init);