LXR linux/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#include <asm/mach/pci.h>
  23#include <asm/mach-types.h>
  24
  25#define MAX_DEV         4
  26#define IRQ_LINES       3
  27
  28/* PCI controller GPIO to IRQ pin mappings */
  29#define INTA            11
  30#define INTB            10
  31#define INTC            9
  32#define INTD            8
  33#define INTE            7
  34#define INTF            6
  35
  36void __init dsmg600_pci_preinit(void)
  37{
  38        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
  39        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
  40        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
  41        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
  42        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW);
  43        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTF), IRQ_TYPE_LEVEL_LOW);
  44        ixp4xx_pci_preinit();
  45}
  46
  47static int __init dsmg600_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  48{
  49        static int pci_irq_table[MAX_DEV][IRQ_LINES] = {
  50                { IXP4XX_GPIO_IRQ(INTE), -1, -1 },
  51                { IXP4XX_GPIO_IRQ(INTA), -1, -1 },
  52                { IXP4XX_GPIO_IRQ(INTB), IXP4XX_GPIO_IRQ(INTC),
  53                  IXP4XX_GPIO_IRQ(INTD) },
  54                { IXP4XX_GPIO_IRQ(INTF), -1, -1 },
  55        };
  56
  57        if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
  58                return pci_irq_table[slot - 1][pin - 1];
  59
  60        return -1;
  61}
  62
  63struct hw_pci __initdata dsmg600_pci = {
  64        .nr_controllers = 1,
  65        .ops            = &ixp4xx_ops,
  66        .preinit        = dsmg600_pci_preinit,
  67        .setup          = ixp4xx_setup,
  68        .map_irq        = dsmg600_map_irq,
  69};
  70
  71int __init dsmg600_pci_init(void)
  72{
  73        if (machine_is_dsmg600())
  74                pci_common_init(&dsmg600_pci);
  75
  76        return 0;
  77}
  78
  79subsys_initcall(dsmg600_pci_init);
  80