/*
*
* BRIEF MODULE DESCRIPTION
* Board specific pci fixups for the Toshiba rbtx4927
*
* Copyright 2001 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* Copyright (C) 2000-2001 Toshiba Corporation
*
* Copyright (C) 2004 MontaVista Software Inc.
* Author: Manish Lachwani (mlachwani@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 <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/txx9/tx4927.h>
#undef DEBUG
#ifdef DEBUG
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif
/* look up table for backplane pci irq for slots 17-20 by pin # */
static unsigned char backplane_pci_irq[4][4] = {
/* PJ6 SLOT: 17, PIN: 1 */ {TX4927_IRQ_IOC_PCIA,
/* PJ6 SLOT: 17, PIN: 2 */
TX4927_IRQ_IOC_PCIB,
/* PJ6 SLOT: 17, PIN: 3 */
TX4927_IRQ_IOC_PCIC,
/* PJ6 SLOT: 17, PIN: 4 */
TX4927_IRQ_IOC_PCID},
/* SB SLOT: 18, PIN: 1 */ {TX4927_IRQ_IOC_PCIB,
/* SB SLOT: 18, PIN: 2 */
TX4927_IRQ_IOC_PCIC,
/* SB SLOT: 18, PIN: 3 */
TX4927_IRQ_IOC_PCID,
/* SB SLOT: 18, PIN: 4 */
TX4927_IRQ_IOC_PCIA},
/* PJ5 SLOT: 19, PIN: 1 */ {TX4927_IRQ_IOC_PCIC,
/* PJ5 SLOT: 19, PIN: 2 */
TX4927_IRQ_IOC_PCID,
/* PJ5 SLOT: 19, PIN: 3 */
TX4927_IRQ_IOC_PCIA,
/* PJ5 SLOT: 19, PIN: 4 */
TX4927_IRQ_IOC_PCIB},
/* PJ4 SLOT: 20, PIN: 1 */ {TX4927_IRQ_IOC_PCID,
/* PJ4 SLOT: 20, PIN: 2 */
TX4927_IRQ_IOC_PCIA,
/* PJ4 SLOT: 20, PIN: 3 */
TX4927_IRQ_IOC_PCIB,
/* PJ4 SLOT: 20, PIN: 4 */
TX4927_IRQ_IOC_PCIC}
};
static int pci_get_irq(const struct pci_dev *dev, int pin)
{
unsigned char irq = pin;
DBG("pci_get_irq: pin is %d\n", pin);
/* IRQ rotation */
irq--; /* 0-3 */
if (dev->bus->parent == NULL &&
PCI_SLOT(dev->devfn) == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) {
printk("Onboard PCI_SLOT(dev->devfn) is %d\n",
PCI_SLOT(dev->devfn));
/* IDSEL=A23 is tx4927 onboard pci slot */
irq = (irq + PCI_SLOT(dev->devfn)) % 4;
irq++; /* 1-4 */
DBG("irq is now %d\n", irq);
switch (irq) {
case 1:
irq = TX4927_IRQ_IOC_PCIA;
break;
case 2:
irq = TX4927_IRQ_IOC_PCIB;
break;
case 3:
irq = TX4927_IRQ_IOC_PCIC;
break;
case 4:
irq = TX4927_IRQ_IOC_PCID;
break;
}
} else {
/* PCI Backplane */
DBG("PCI Backplane PCI_SLOT(dev->devfn) is %d\n",
PCI_SLOT(dev->devfn));
irq = backplane_pci_irq[PCI_SLOT(dev->devfn) - 17][irq];
}
DBG("assigned irq %d\n", irq);
return irq;
}
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
unsigned char irq;
printk("PCI Setup for pin %d \n", pin);
if (dev->device == 0x9130) /* IDE */
irq = 14;
else
irq = pci_get_irq(dev, pin);
return irq;
}
/* Do platform specific device initialization at pci_enable_device() time */
int pcibios_plat_dev_init(struct pci_dev *dev)
{
return 0;
}
