fixup-jmr3927.c
2.56 KB
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/*
*
* BRIEF MODULE DESCRIPTION
* Board specific pci fixups.
*
* Copyright 2001 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/types.h>
#include <asm/txx9/pci.h>
#include <asm/txx9/jmr3927.h>
int __init jmr3927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
unsigned char irq = pin;
/* IRQ rotation (PICMG) */
irq--; /* 0-3 */
if (slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(23)) {
/* PCI CardSlot (IDSEL=A23, DevNu=12) */
/* PCIA => PCIC (IDSEL=A23) */
/* NOTE: JMR3927 JP1 must be set to OPEN */
irq = (irq + 2) % 4;
} else if (slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(22)) {
/* PCI CardSlot (IDSEL=A22, DevNu=11) */
/* PCIA => PCIA (IDSEL=A22) */
/* NOTE: JMR3927 JP1 must be set to OPEN */
irq = (irq + 0) % 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 = JMR3927_IRQ_IOC_PCIA;
break;
case 2:
irq = JMR3927_IRQ_IOC_PCIB;
break;
case 3:
irq = JMR3927_IRQ_IOC_PCIC;
break;
case 4:
irq = JMR3927_IRQ_IOC_PCID;
break;
}
/* Check OnBoard Ethernet (IDSEL=A24, DevNu=13) */
if (dev->bus->parent == NULL &&
slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(24))
irq = JMR3927_IRQ_ETHER0;
return irq;
}