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

   1 /*
   2  * arch/arch/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
  21 #include <asm/mach-types.h>
  22 #include <asm/hardware.h>
  23 #include <asm/irq.h>
  24
  25 #include <asm/mach/pci.h>
  26
  27 extern void ixp4xx_pci_preinit(void);
  28 extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
  29 extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);
  30
  31 void __init coyote_pci_preinit(void)
  32 {
  33         gpio_line_config(COYOTE_PCI_SLOT0_PIN,
  34                         IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
  35
  36         gpio_line_config(COYOTE_PCI_SLOT1_PIN,
  37                         IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
  38
  39         gpio_line_isr_clear(COYOTE_PCI_SLOT0_PIN);
  40         gpio_line_isr_clear(COYOTE_PCI_SLOT1_PIN);
  41
  42         ixp4xx_pci_preinit();
  43 }
  44
  45 static int __init coyote_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  46 {
  47         if (slot == COYOTE_PCI_SLOT0_DEVID)
  48                 return IRQ_COYOTE_PCI_SLOT0;
  49         else if (slot == COYOTE_PCI_SLOT1_DEVID)
  50                 return IRQ_COYOTE_PCI_SLOT1;
  51         else return -1;
  52 }
  53
  54 struct hw_pci coyote_pci __initdata = {
  55         .nr_controllers = 1,
  56         .preinit =        coyote_pci_preinit,
  57         .swizzle =        pci_std_swizzle,
  58         .setup =          ixp4xx_setup,
  59         .scan =           ixp4xx_scan_bus,
  60         .map_irq =        coyote_map_irq,
  61 };
  62
  63 int __init coyote_pci_init(void)
  64 {
  65         if (machine_is_adi_coyote())
  66                 pci_common_init(&coyote_pci);
  67         return 0;
  68 }
  69
  70 subsys_initcall(coyote_pci_init);