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
  30 #include <asm/mach-types.h>
  31 #include <mach/hardware.h>
  32 #include <mach/gtwx5715.h>
  33 #include <asm/mach/pci.h>
  34
  35 /*
  36  * The exact GPIO pins and IRQs are defined in arch-ixp4xx/gtwx5715.h
  37  * Slot 0 isn't actually populated with a card connector but
  38  * we initialize it anyway in case a future version has the
  39  * slot populated or someone with good soldering skills has
  40  * some free time.
  41  */
  42 void __init gtwx5715_pci_preinit(void)
  43 {
  44         set_irq_type(GTWX5715_PCI_SLOT0_INTA_IRQ, IRQ_TYPE_LEVEL_LOW);
  45         set_irq_type(GTWX5715_PCI_SLOT0_INTB_IRQ, IRQ_TYPE_LEVEL_LOW);
  46         set_irq_type(GTWX5715_PCI_SLOT1_INTA_IRQ, IRQ_TYPE_LEVEL_LOW);
  47         set_irq_type(GTWX5715_PCI_SLOT1_INTB_IRQ, IRQ_TYPE_LEVEL_LOW);
  48
  49         ixp4xx_pci_preinit();
  50 }
  51
  52
  53 static int __init gtwx5715_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  54 {
  55         int rc;
  56         static int gtwx5715_irqmap
  57                         [GTWX5715_PCI_SLOT_COUNT]
  58                         [GTWX5715_PCI_INT_PIN_COUNT] = {
  59         {GTWX5715_PCI_SLOT0_INTA_IRQ, GTWX5715_PCI_SLOT0_INTB_IRQ},
  60         {GTWX5715_PCI_SLOT1_INTA_IRQ, GTWX5715_PCI_SLOT1_INTB_IRQ},
  61 };
  62
  63         if (slot >= GTWX5715_PCI_SLOT_COUNT ||
  64                         pin >= GTWX5715_PCI_INT_PIN_COUNT) rc = -1;
  65         else
  66                 rc = gtwx5715_irqmap[slot][pin-1];
  67
  68         printk("%s: Mapped slot %d pin %d to IRQ %d\n", __func__, slot, pin, rc);
  69         return(rc);
  70 }
  71
  72 struct hw_pci gtwx5715_pci __initdata = {
  73         .nr_controllers = 1,
  74         .preinit =        gtwx5715_pci_preinit,
  75         .swizzle =        pci_std_swizzle,
  76         .setup =          ixp4xx_setup,
  77         .scan =           ixp4xx_scan_bus,
  78         .map_irq =        gtwx5715_map_irq,
  79 };
  80
  81 int __init gtwx5715_pci_init(void)
  82 {
  83         if (machine_is_gtwx5715())
  84         {
  85                 pci_common_init(&gtwx5715_pci);
  86         }
  87
  88         return 0;
  89 }
  90
  91 subsys_initcall(gtwx5715_pci_init);