LXR linux/arch/arm/mach-ixp4xx/avila-pci.c

   1/*
   2 * arch/arm/mach-ixp4xx/avila-pci.c
   3 *
   4 * Gateworks Avila board-level PCI initialization
   5 *
   6 * Author: Michael-Luke Jones <mlj28@cam.ac.uk>
   7 *
   8 * Based on ixdp-pci.c
   9 * Copyright (C) 2002 Intel Corporation.
  10 * Copyright (C) 2003-2004 MontaVista Software, Inc.
  11 *
  12 * Maintainer: Deepak Saxena <dsaxena@plexity.net>
  13 *
  14 * This program is free software; you can redistribute it and/or modify
  15 * it under the terms of the GNU General Public License version 2 as
  16 * published by the Free Software Foundation.
  17 *
  18 */
  19
  20#include <linux/kernel.h>
  21#include <linux/pci.h>
  22#include <linux/init.h>
  23#include <linux/irq.h>
  24#include <linux/delay.h>
  25
  26#include <asm/mach/pci.h>
  27#include <asm/irq.h>
  28#include <mach/hardware.h>
  29#include <asm/mach-types.h>
  30
  31void __init avila_pci_preinit(void)
  32{
  33        set_irq_type(IRQ_AVILA_PCI_INTA, IRQ_TYPE_LEVEL_LOW);
  34        set_irq_type(IRQ_AVILA_PCI_INTB, IRQ_TYPE_LEVEL_LOW);
  35        set_irq_type(IRQ_AVILA_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
  36        set_irq_type(IRQ_AVILA_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
  37
  38        ixp4xx_pci_preinit();
  39}
  40
  41static int __init avila_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  42{
  43        static int pci_irq_table[AVILA_PCI_IRQ_LINES] = {
  44                IRQ_AVILA_PCI_INTA,
  45                IRQ_AVILA_PCI_INTB,
  46                IRQ_AVILA_PCI_INTC,
  47                IRQ_AVILA_PCI_INTD
  48        };
  49
  50        int irq = -1;
  51
  52        if (slot >= 1 &&
  53        slot <= (machine_is_loft() ? LOFT_PCI_MAX_DEV : AVILA_PCI_MAX_DEV) &&
  54                pin >= 1 && pin <= AVILA_PCI_IRQ_LINES) {
  55                irq = pci_irq_table[(slot + pin - 2) % 4];
  56        }
  57
  58        return irq;
  59}
  60
  61struct hw_pci avila_pci __initdata = {
  62        .nr_controllers = 1,
  63        .preinit        = avila_pci_preinit,
  64        .swizzle        = pci_std_swizzle,
  65        .setup          = ixp4xx_setup,
  66        .scan           = ixp4xx_scan_bus,
  67        .map_irq        = avila_map_irq,
  68};
  69
  70int __init avila_pci_init(void)
  71{
  72        if (machine_is_avila() || machine_is_loft())
  73                pci_common_init(&avila_pci);
  74        return 0;
  75}
  76
  77subsys_initcall(avila_pci_init);
  78
  79