text: /*
   * Toshiba rbtx4938 pci routines
   * Copyright (C) 2000-2001 Toshiba Corporation
   *
   * 2003-2005 (c) MontaVista Software, Inc. 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.
   *
   * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
   */
  #include <linux/types.h>
  #include <asm/txx9/pci.h>
  #include <asm/txx9/rbtx4938.h>
  
  int __init rbtx4938_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  {
  	int irq = tx4938_pcic1_map_irq(dev, slot);
  
  	if (irq >= 0)
  		return irq;
  	irq = pin;
  	/* IRQ rotation */
  	irq--;	/* 0-3 */
  	if (slot == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) {
  		/* PCI CardSlot (IDSEL=A23) */
  		/* PCIA => PCIA (IDSEL=A23) */
  		irq = (irq + 0 + slot) % 4;
  	} else {
  		/* PCI Backplane */
  		if (txx9_pci_option & TXX9_PCI_OPT_PICMG)
  			irq = (irq + 33 - slot) % 4;
  		else
  			irq = (irq + 3 + slot) % 4;
  	}
  	irq++;	/* 1-4 */
  
  	switch (irq) {
  	case 1:
  		irq = RBTX4938_IRQ_IOC_PCIA;
  		break;
  	case 2:
  		irq = RBTX4938_IRQ_IOC_PCIB;
  		break;
  	case 3:
  		irq = RBTX4938_IRQ_IOC_PCIC;
  		break;
  	case 4:
  		irq = RBTX4938_IRQ_IOC_PCID;
  		break;
  	}
  	return irq;
  }
  