fixup-rbtx4938.c

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/*
 * 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 ([email protected])
 */
#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;
}