release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-ixp4xx/coyote-pci.c

   1 /*
   2  * arch/arm/mach-ixp4xx/coyote-pci.c
   3  *
   4  * PCI setup routines for ADI Engineering Coyote platform
   5  *
   6  * Copyright (C) 2002 Jungo Software Technologies.
   7  * Copyright (C) 2003 MontaVista Softwrae, Inc.
   8  *
   9  * Maintainer: Deepak Saxena <dsaxena@mvista.com>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/pci.h>
  19 #include <linux/init.h>
  20 #include <linux/irq.h>
  21 #include <asm/mach-types.h>
  22 #include <mach/hardware.h>
  23 #include <asm/irq.h>
  24 #include <asm/mach/pci.h>
  25
  26 #define SLOT0_DEVID     14
  27 #define SLOT1_DEVID     15
  28
  29 /* PCI controller GPIO to IRQ pin mappings */
  30 #define SLOT0_INTA      6
  31 #define SLOT1_INTA      11
  32
  33 void __init coyote_pci_preinit(void)
  34 {
  35         set_irq_type(IXP4XX_GPIO_IRQ(SLOT0_INTA), IRQ_TYPE_LEVEL_LOW);
  36         set_irq_type(IXP4XX_GPIO_IRQ(SLOT1_INTA), IRQ_TYPE_LEVEL_LOW);
  37         ixp4xx_pci_preinit();
  38 }
  39
  40 static int __init coyote_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  41 {
  42         if (slot == SLOT0_DEVID)
  43                 return IXP4XX_GPIO_IRQ(SLOT0_INTA);
  44         else if (slot == SLOT1_DEVID)
  45                 return IXP4XX_GPIO_IRQ(SLOT1_INTA);
  46         else return -1;
  47 }
  48
  49 struct hw_pci coyote_pci __initdata = {
  50         .nr_controllers = 1,
  51         .preinit =        coyote_pci_preinit,
  52         .swizzle =        pci_std_swizzle,
  53         .setup =          ixp4xx_setup,
  54         .scan =           ixp4xx_scan_bus,
  55         .map_irq =        coyote_map_irq,
  56 };
  57
  58 int __init coyote_pci_init(void)
  59 {
  60         if (machine_is_adi_coyote())
  61                 pci_common_init(&coyote_pci);
  62         return 0;
  63 }
  64
  65 subsys_initcall(coyote_pci_init);