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/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 coyote_pci_preinit(void)
  31 {
  32         gpio_line_config(COYOTE_PCI_SLOT0_PIN,
  33                         IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
  34
  35         gpio_line_config(COYOTE_PCI_SLOT1_PIN,
  36                         IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
  37
  38         gpio_line_isr_clear(COYOTE_PCI_SLOT0_PIN);
  39         gpio_line_isr_clear(COYOTE_PCI_SLOT1_PIN);
  40
  41         ixp4xx_pci_preinit();
  42 }
  43
  44 static int __init coyote_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  45 {
  46         if (slot == COYOTE_PCI_SLOT0_DEVID)
  47                 return IRQ_COYOTE_PCI_SLOT0;
  48         else if (slot == COYOTE_PCI_SLOT1_DEVID)
  49                 return IRQ_COYOTE_PCI_SLOT1;
  50         else return -1;
  51 }
  52
  53 struct hw_pci coyote_pci __initdata = {
  54         .nr_controllers = 1,
  55         .preinit =        coyote_pci_preinit,
  56         .swizzle =        pci_std_swizzle,
  57         .setup =          ixp4xx_setup,
  58         .scan =           ixp4xx_scan_bus,
  59         .map_irq =        coyote_map_irq,
  60 };
  61
  62 int __init coyote_pci_init(void)
  63 {
  64         if (machine_is_adi_coyote())
  65                 pci_common_init(&coyote_pci);
  66         return 0;
  67 }
  68
  69 subsys_initcall(coyote_pci_init);