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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 (mlachwani@mvista.com)
*/
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/tx4938/rbtx4938.h>
extern struct pci_controller tx4938_pci_controller[];
static int pci_get_irq(const struct pci_dev *dev, int pin)
{
int irq = pin;
u8 slot = PCI_SLOT(dev->devfn);
struct pci_controller *controller = (struct pci_controller *)dev->sysdata;
if (controller == &tx4938_pci_controller[1]) {
/* TX4938 PCIC1 */
switch (slot) {
case TX4938_PCIC_IDSEL_AD_TO_SLOT(31):
if (tx4938_ccfgptr->pcfg & TX4938_PCFG_ETH0_SEL)
return RBTX4938_IRQ_IRC + TX4938_IR_ETH0;
break;
case TX4938_PCIC_IDSEL_AD_TO_SLOT(30):
if (tx4938_ccfgptr->pcfg & TX4938_PCFG_ETH1_SEL)
return RBTX4938_IRQ_IRC + TX4938_IR_ETH1;
break;
}
return 0;
}
/* IRQ rotation */
irq--; /* 0-3 */
if (dev->bus->parent == NULL &&
(slot == TX4938_PCIC_IDSEL_AD_TO_SLOT(23))) {
/* PCI CardSlot (IDSEL=A23) */
/* PCIA => PCIA (IDSEL=A23) */
irq = (irq + 0 + slot) % 4;
} else {
/* PCI Backplane */
irq = (irq + 33 - 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;
}
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
unsigned char irq = 0;
irq = pci_get_irq(dev, pin);
printk(KERN_INFO "PCI: 0x%02x:0x%02x(0x%02x,0x%02x) IRQ=%d\n",
dev->bus->number, dev->devfn, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), irq);
return irq;
}
/*
* Do platform specific device initialization at pci_enable_device() time
*/
int pcibios_plat_dev_init(struct pci_dev *dev)
{
return 0;
}
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