1/* pci-irq.c: PCI IRQ routing on the FRV motherboard 2 * 3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * derived from: arch/i386/kernel/pci-irq.c: (c) 1999--2000 Martin Mares <mj@suse.cz> 6 */ 7 8#include <linux/types.h> 9#include <linux/kernel.h> 10#include <linux/pci.h> 11#include <linux/init.h> 12#include <linux/interrupt.h> 13#include <linux/irq.h> 14 15#include <asm/io.h> 16#include <asm/smp.h> 17 18#include "pci-frv.h" 19 20/* 21 * DEVICE DEVNO INT#A INT#B INT#C INT#D 22 * ======= ======= ======= ======= ======= ======= 23 * MB86943 0 fpga.10 - - - 24 * RTL8029 16 fpga.12 - - - 25 * SLOT 1 19 fpga.6 fpga.5 fpga.4 fpga.3 26 * SLOT 2 18 fpga.5 fpga.4 fpga.3 fpga.6 27 * SLOT 3 17 fpga.4 fpga.3 fpga.6 fpga.5 28 * 29 */ 30 31static const uint8_t __initconst pci_bus0_irq_routing[32][4] = { 32 [0 ] = { IRQ_FPGA_MB86943_PCI_INTA }, 33 [16] = { IRQ_FPGA_RTL8029_INTA }, 34 [17] = { IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB }, 35 [18] = { IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA }, 36 [19] = { IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD }, 37}; 38 39void __init pcibios_irq_init(void) 40{ 41} 42 43void __init pcibios_fixup_irqs(void) 44{ 45 struct pci_dev *dev = NULL; 46 uint8_t line, pin; 47 48 for_each_pci_dev(dev) { 49 pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); 50 if (pin) { 51 dev->irq = pci_bus0_irq_routing[PCI_SLOT(dev->devfn)][pin - 1]; 52 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); 53 } 54 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line); 55 } 56} 57 58void pcibios_enable_irq(struct pci_dev *dev) 59{ 60 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); 61} 62