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/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 __init pcibios_penalize_isa_irq(int irq)
  59{
  60}
  61
  62void pcibios_enable_irq(struct pci_dev *dev)
  63{
  64        pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
  65}
  66