/*
|
* 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 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;
|
}
|
