arch/arm/mach-ixp4xx/dsmg600-pci.c

   1 /*
   2  * DSM-G600 board-level PCI initialization
   3  *
   4  * Copyright (C) 2006 Tower Technologies
   5  * Author: Alessandro Zummo <a.zummo@towertech.it>
   6  *
   7  * based on ixdp425-pci.c:
   8  *      Copyright (C) 2002 Intel Corporation.
   9  *      Copyright (C) 2003-2004 MontaVista Software, Inc.
  10  *
  11  * Maintainer: http://www.nslu2-linux.org/
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License version 2 as
  15  * published by the Free Software Foundation.
  16  *
  17  */
  18
  19 #include <linux/pci.h>
  20 #include <linux/init.h>
  21 #include <linux/irq.h>
  22
  23 #include <asm/mach/pci.h>
  24 #include <asm/mach-types.h>
  25
  26 void __init dsmg600_pci_preinit(void)
  27 {
  28         set_irq_type(IRQ_DSMG600_PCI_INTA, IRQT_LOW);
  29         set_irq_type(IRQ_DSMG600_PCI_INTB, IRQT_LOW);
  30         set_irq_type(IRQ_DSMG600_PCI_INTC, IRQT_LOW);
  31         set_irq_type(IRQ_DSMG600_PCI_INTD, IRQT_LOW);
  32         set_irq_type(IRQ_DSMG600_PCI_INTE, IRQT_LOW);
  33         set_irq_type(IRQ_DSMG600_PCI_INTF, IRQT_LOW);
  34
  35         ixp4xx_pci_preinit();
  36 }
  37
  38 static int __init dsmg600_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  39 {
  40         static int pci_irq_table[DSMG600_PCI_MAX_DEV][DSMG600_PCI_IRQ_LINES] =
  41         {
  42                 { IRQ_DSMG600_PCI_INTE, -1, -1 },
  43                 { IRQ_DSMG600_PCI_INTA, -1, -1 },
  44                 { IRQ_DSMG600_PCI_INTB, IRQ_DSMG600_PCI_INTC, IRQ_DSMG600_PCI_INTD },
  45                 { IRQ_DSMG600_PCI_INTF, -1, -1 },
  46         };
  47
  48         int irq = -1;
  49
  50         if (slot >= 1 && slot <= DSMG600_PCI_MAX_DEV &&
  51                 pin >= 1 && pin <= DSMG600_PCI_IRQ_LINES)
  52                 irq = pci_irq_table[slot-1][pin-1];
  53
  54         return irq;
  55 }
  56
  57 struct hw_pci __initdata dsmg600_pci = {
  58         .nr_controllers = 1,
  59         .preinit        = dsmg600_pci_preinit,
  60         .swizzle        = pci_std_swizzle,
  61         .setup          = ixp4xx_setup,
  62         .scan           = ixp4xx_scan_bus,
  63         .map_irq        = dsmg600_map_irq,
  64 };
  65
  66 int __init dsmg600_pci_init(void)
  67 {
  68         if (machine_is_dsmg600())
  69                 pci_common_init(&dsmg600_pci);
  70
  71         return 0;
  72 }
  73
  74 subsys_initcall(dsmg600_pci_init);