/* 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 __initdata 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 __init pcibios_penalize_isa_irq(int irq)

  {
  }
  
  void pcibios_enable_irq(struct pci_dev *dev)
  {
  	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
  }