arch/arm/mach-ixp4xx/ixdpg425-pci.c

   1 /*
   2  * arch/arch/mach-ixp4xx/ixdpg425-pci.c
   3  *
   4  * PCI setup routines for Intel IXDPG425 Platform
   5  *
   6  * Copyright (C) 2004 MontaVista Softwrae, Inc.
   7  *
   8  * Maintainer: Deepak Saxena <dsaxena@plexity.net>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/pci.h>
  18 #include <linux/init.h>
  19
  20 #include <asm/mach-types.h>
  21 #include <asm/hardware.h>
  22 #include <asm/irq.h>
  23
  24 #include <asm/mach/pci.h>
  25
  26 extern void ixp4xx_pci_preinit(void);
  27 extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
  28 extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);
  29
  30 void __init ixdpg425_pci_preinit(void)
  31 {
  32         gpio_line_config(6, IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
  33         gpio_line_config(7, IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
  34
  35         gpio_line_isr_clear(6);
  36         gpio_line_isr_clear(7);
  37
  38         ixp4xx_pci_preinit();
  39 }
  40
  41 static int __init ixdpg425_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  42 {
  43         if (slot == 12 || slot == 13)
  44                 return IRQ_IXP4XX_GPIO7;
  45         else if (slot == 14)
  46                 return IRQ_IXP4XX_GPIO6;
  47         else return -1;
  48 }
  49
  50 struct hw_pci ixdpg425_pci __initdata = {
  51         .nr_controllers = 1,
  52         .preinit =        ixdpg425_pci_preinit,
  53         .swizzle =        pci_std_swizzle,
  54         .setup =          ixp4xx_setup,
  55         .scan =           ixp4xx_scan_bus,
  56         .map_irq =        ixdpg425_map_irq,
  57 };
  58
  59 int __init ixdpg425_pci_init(void)
  60 {
  61         if (machine_is_ixdpg425())
  62                 pci_common_init(&ixdpg425_pci);
  63         return 0;
  64 }
  65
  66 subsys_initcall(ixdpg425_pci_init);