text: /*
   * arch/arm/mach-orion5x/rd88f5182-setup.c
   *
   * Marvell Orion-NAS Reference Design Setup
   *
   * Maintainer: Ronen Shitrit <rshitrit@marvell.com>
   *
   * This file is licensed under the terms of the GNU General Public
   * License version 2.  This program is licensed "as is" without any
   * warranty of any kind, whether express or implied.
   */
  #include <linux/gpio.h>
  #include <linux/kernel.h>
  #include <linux/init.h>
  #include <linux/platform_device.h>
  #include <linux/pci.h>
  #include <linux/irq.h>
  #include <asm/mach-types.h>
  #include <asm/mach/arch.h>
  #include <asm/mach/pci.h>
  #include "common.h"
  #include "orion5x.h"
  
  /*****************************************************************************
   * RD-88F5182 Info
   ****************************************************************************/
  
  /*
   * PCI
   */
  
  #define RD88F5182_PCI_SLOT0_OFFS	7
  #define RD88F5182_PCI_SLOT0_IRQ_A_PIN	7
  #define RD88F5182_PCI_SLOT0_IRQ_B_PIN	6
  
  /*****************************************************************************
   * PCI
   ****************************************************************************/
  
  static void __init rd88f5182_pci_preinit(void)
  {
  	int pin;
  
  	/*
  	 * Configure PCI GPIO IRQ pins
  	 */
  	pin = RD88F5182_PCI_SLOT0_IRQ_A_PIN;
  	if (gpio_request(pin, "PCI IntA") == 0) {
  		if (gpio_direction_input(pin) == 0) {
  			irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
  		} else {
  			printk(KERN_ERR "rd88f5182_pci_preinit failed to "
  					"set_irq_type pin %d\n", pin);
  			gpio_free(pin);
  		}
  	} else {
  		printk(KERN_ERR "rd88f5182_pci_preinit failed to request gpio %d\n", pin);
  	}
  
  	pin = RD88F5182_PCI_SLOT0_IRQ_B_PIN;
  	if (gpio_request(pin, "PCI IntB") == 0) {
  		if (gpio_direction_input(pin) == 0) {
  			irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
  		} else {
  			printk(KERN_ERR "rd88f5182_pci_preinit failed to "
  					"set_irq_type pin %d\n", pin);
  			gpio_free(pin);
  		}
  	} else {
  		printk(KERN_ERR "rd88f5182_pci_preinit failed to gpio_request %d\n", pin);
  	}
  }
  
  static int __init rd88f5182_pci_map_irq(const struct pci_dev *dev, u8 slot,
  	u8 pin)
  {
  	int irq;
  
  	/*
  	 * Check for devices with hard-wired IRQs.
  	 */
  	irq = orion5x_pci_map_irq(dev, slot, pin);
  	if (irq != -1)
  		return irq;
  
  	/*
  	 * PCI IRQs are connected via GPIOs
  	 */
  	switch (slot - RD88F5182_PCI_SLOT0_OFFS) {
  	case 0:
  		if (pin == 1)
  			return gpio_to_irq(RD88F5182_PCI_SLOT0_IRQ_A_PIN);
  		else
  			return gpio_to_irq(RD88F5182_PCI_SLOT0_IRQ_B_PIN);
  	default:
  		return -1;
  	}
  }
  
  static struct hw_pci rd88f5182_pci __initdata = {
  	.nr_controllers	= 2,
  	.preinit	= rd88f5182_pci_preinit,
  	.setup		= orion5x_pci_sys_setup,
  	.scan		= orion5x_pci_sys_scan_bus,
  	.map_irq	= rd88f5182_pci_map_irq,
  };
  
  static int __init rd88f5182_pci_init(void)
  {
  	if (of_machine_is_compatible("marvell,rd-88f5182-nas"))
  		pci_common_init(&rd88f5182_pci);
  
  	return 0;
  }
  
  subsys_initcall(rd88f5182_pci_init);
  