LXR linux/arch/arm/mach-ixp4xx/gtwx5715-pci.c

   1/*
   2 * arch/arm/mach-ixp4xx/gtwx5715-pci.c
   3 *
   4 * Gemtek GTWX5715 (Linksys WRV54G) board setup
   5 *
   6 * Copyright (C) 2004 George T. Joseph
   7 * Derived from Coyote
   8 *
   9 * This program is free software; you can redistribute it and/or
  10 * modify it under the terms of the GNU General Public License
  11 * as published by the Free Software Foundation; either version 2
  12 * of the License, or (at your option) any later version.
  13 *
  14 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * You should have received a copy of the GNU General Public License
  20 * along with this program; if not, write to the Free Software
  21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22 *
  23 */
  24
  25#include <linux/pci.h>
  26#include <linux/init.h>
  27#include <linux/delay.h>
  28#include <linux/irq.h>
  29#include <asm/mach-types.h>
  30#include <mach/hardware.h>
  31#include <asm/mach/pci.h>
  32
  33#define SLOT0_DEVID     0
  34#define SLOT1_DEVID     1
  35#define INTA            10 /* slot 1 has INTA and INTB crossed */
  36#define INTB            11
  37
  38/*
  39 * Slot 0 isn't actually populated with a card connector but
  40 * we initialize it anyway in case a future version has the
  41 * slot populated or someone with good soldering skills has
  42 * some free time.
  43 */
  44void __init gtwx5715_pci_preinit(void)
  45{
  46        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
  47        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
  48        ixp4xx_pci_preinit();
  49}
  50
  51
  52static int __init gtwx5715_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  53{
  54        int rc = -1;
  55
  56        if ((slot == SLOT0_DEVID && pin == 1) ||
  57            (slot == SLOT1_DEVID && pin == 2))
  58                rc = IXP4XX_GPIO_IRQ(INTA);
  59        else if ((slot == SLOT0_DEVID && pin == 2) ||
  60                 (slot == SLOT1_DEVID && pin == 1))
  61                rc = IXP4XX_GPIO_IRQ(INTB);
  62
  63        printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n",
  64               __func__, slot, pin, rc);
  65        return rc;
  66}
  67
  68struct hw_pci gtwx5715_pci __initdata = {
  69        .nr_controllers = 1,
  70        .ops            = &ixp4xx_ops,
  71        .preinit =        gtwx5715_pci_preinit,
  72        .setup =          ixp4xx_setup,
  73        .map_irq =        gtwx5715_map_irq,
  74};
  75
  76int __init gtwx5715_pci_init(void)
  77{
  78        if (machine_is_gtwx5715())
  79                pci_common_init(&gtwx5715_pci);
  80
  81        return 0;
  82}
  83
  84subsys_initcall(gtwx5715_pci_init);
  85