LXR linux/arch/frv/mb93090-mb00/pci-irq.c

   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/slab.h>
  13#include <linux/interrupt.h>
  14#include <linux/irq.h>
  15
  16#include <asm/io.h>
  17#include <asm/smp.h>
  18
  19#include "pci-frv.h"
  20
  21/*
  22 *      DEVICE  DEVNO   INT#A   INT#B   INT#C   INT#D
  23 *      ======= ======= ======= ======= ======= =======
  24 *      MB86943 0       fpga.10 -       -       -
  25 *      RTL8029 16      fpga.12 -       -       -
  26 *      SLOT 1  19      fpga.6  fpga.5  fpga.4  fpga.3
  27 *      SLOT 2  18      fpga.5  fpga.4  fpga.3  fpga.6
  28 *      SLOT 3  17      fpga.4  fpga.3  fpga.6  fpga.5
  29 *
  30 */
  31
  32static const uint8_t __initdata pci_bus0_irq_routing[32][4] = {
  33        [0 ] = { IRQ_FPGA_MB86943_PCI_INTA },
  34        [16] = { IRQ_FPGA_RTL8029_INTA },
  35        [17] = { IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB },
  36        [18] = { IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA },
  37        [19] = { IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD },
  38};
  39
  40void __init pcibios_irq_init(void)
  41{
  42}
  43
  44void __init pcibios_fixup_irqs(void)
  45{
  46        struct pci_dev *dev = NULL;
  47        uint8_t line, pin;
  48
  49        for_each_pci_dev(dev) {
  50                pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
  51                if (pin) {
  52                        dev->irq = pci_bus0_irq_routing[PCI_SLOT(dev->devfn)][pin - 1];
  53                        pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
  54                }
  55                pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
  56        }
  57}
  58
  59void __init pcibios_penalize_isa_irq(int irq)
  60{
  61}
  62
  63void pcibios_enable_irq(struct pci_dev *dev)
  64{
  65        pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
  66}
  67