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kernel/linux-imx6_3.14.28/arch/arm/mach-ixp4xx/coyote-pci.c 1.53 KB
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  /*
   * arch/arm/mach-ixp4xx/coyote-pci.c
   *
   * PCI setup routines for ADI Engineering Coyote platform
   *
   * Copyright (C) 2002 Jungo Software Technologies.
   * Copyright (C) 2003 MontaVista Softwrae, Inc.
   *
   * Maintainer: Deepak Saxena <dsaxena@mvista.com>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   *
   */
  
  #include <linux/kernel.h>
  #include <linux/pci.h>
  #include <linux/init.h>
  #include <linux/irq.h>
  #include <asm/mach-types.h>
  #include <mach/hardware.h>
  #include <asm/irq.h>
  #include <asm/mach/pci.h>
  
  #define SLOT0_DEVID	14
  #define SLOT1_DEVID	15
  
  /* PCI controller GPIO to IRQ pin mappings */
  #define SLOT0_INTA	6
  #define SLOT1_INTA	11
  
  void __init coyote_pci_preinit(void)
  {
  	irq_set_irq_type(IXP4XX_GPIO_IRQ(SLOT0_INTA), IRQ_TYPE_LEVEL_LOW);
  	irq_set_irq_type(IXP4XX_GPIO_IRQ(SLOT1_INTA), IRQ_TYPE_LEVEL_LOW);
  	ixp4xx_pci_preinit();
  }
  
  static int __init coyote_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  {
  	if (slot == SLOT0_DEVID)
  		return IXP4XX_GPIO_IRQ(SLOT0_INTA);
  	else if (slot == SLOT1_DEVID)
  		return IXP4XX_GPIO_IRQ(SLOT1_INTA);
  	else return -1;
  }
  
  struct hw_pci coyote_pci __initdata = {
  	.nr_controllers = 1,
  	.ops		= &ixp4xx_ops,
  	.preinit =        coyote_pci_preinit,
  	.setup =          ixp4xx_setup,
  	.map_irq =        coyote_map_irq,
  };
  
  int __init coyote_pci_init(void)
  {
  	if (machine_is_adi_coyote())
  		pci_common_init(&coyote_pci);
  	return 0;
  }
  
  subsys_initcall(coyote_pci_init);