62 строки
1.6 KiB
C
62 строки
1.6 KiB
C
/* pci-irq.c: PCI IRQ routing on the FRV motherboard
|
|
*
|
|
* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
* derived from: arch/i386/kernel/pci-irq.c: (c) 1999--2000 Martin Mares <mj@suse.cz>
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/smp.h>
|
|
|
|
#include "pci-frv.h"
|
|
|
|
/*
|
|
* DEVICE DEVNO INT#A INT#B INT#C INT#D
|
|
* ======= ======= ======= ======= ======= =======
|
|
* MB86943 0 fpga.10 - - -
|
|
* RTL8029 16 fpga.12 - - -
|
|
* SLOT 1 19 fpga.6 fpga.5 fpga.4 fpga.3
|
|
* SLOT 2 18 fpga.5 fpga.4 fpga.3 fpga.6
|
|
* SLOT 3 17 fpga.4 fpga.3 fpga.6 fpga.5
|
|
*
|
|
*/
|
|
|
|
static const uint8_t __initconst pci_bus0_irq_routing[32][4] = {
|
|
[0 ] = { IRQ_FPGA_MB86943_PCI_INTA },
|
|
[16] = { IRQ_FPGA_RTL8029_INTA },
|
|
[17] = { IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB },
|
|
[18] = { IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA },
|
|
[19] = { IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD },
|
|
};
|
|
|
|
void __init pcibios_irq_init(void)
|
|
{
|
|
}
|
|
|
|
void __init pcibios_fixup_irqs(void)
|
|
{
|
|
struct pci_dev *dev = NULL;
|
|
uint8_t line, pin;
|
|
|
|
for_each_pci_dev(dev) {
|
|
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
|
|
if (pin) {
|
|
dev->irq = pci_bus0_irq_routing[PCI_SLOT(dev->devfn)][pin - 1];
|
|
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
|
|
}
|
|
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
|
|
}
|
|
}
|
|
|
|
void pcibios_enable_irq(struct pci_dev *dev)
|
|
{
|
|
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
|
|
}
|