LXR linux/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#include <asm/mach/pci.h>
  22#include <asm/mach-types.h>
  23
  24#define MAX_DEV         3
  25#define IRQ_LINES       3
  26
  27/* PCI controller GPIO to IRQ pin mappings */
  28#define INTA            11
  29#define INTB            10
  30#define INTC            9
  31#define INTD            8
  32#define INTE            7
  33
  34void __init nas100d_pci_preinit(void)
  35{
  36        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
  37        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
  38        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
  39        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
  40        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW);
  41        ixp4xx_pci_preinit();
  42}
  43
  44static int __init nas100d_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  45{
  46        static int pci_irq_table[MAX_DEV][IRQ_LINES] = {
  47                { IXP4XX_GPIO_IRQ(INTA), -1, -1 },
  48                { IXP4XX_GPIO_IRQ(INTB), -1, -1 },
  49                { IXP4XX_GPIO_IRQ(INTC), IXP4XX_GPIO_IRQ(INTD),
  50                  IXP4XX_GPIO_IRQ(INTE) },
  51        };
  52
  53        if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
  54                return pci_irq_table[slot - 1][pin - 1];
  55
  56        return -1;
  57}
  58
  59struct hw_pci __initdata nas100d_pci = {
  60        .nr_controllers = 1,
  61        .ops            = &ixp4xx_ops,
  62        .preinit        = nas100d_pci_preinit,
  63        .setup          = ixp4xx_setup,
  64        .map_irq        = nas100d_map_irq,
  65};
  66
  67int __init nas100d_pci_init(void)
  68{
  69        if (machine_is_nas100d())
  70                pci_common_init(&nas100d_pci);
  71
  72        return 0;
  73}
  74
  75subsys_initcall(nas100d_pci_init);
  76