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fixup-rbtx4938.c

/*
 * 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;
}

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