92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
/*
|
|
* 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[];
|
|
|
|
int pci_get_irq(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(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;
|
|
}
|
|
|