arch/mips/momentum/ocelot_g/pci-irq.c

   1 /*
   2  * Copyright 2002 Momentum Computer Inc.
   3  * Author: Matthew Dharm <mdharm@momenco.com>
   4  *
   5  * Based on work for the Linux port to the Ocelot board, which is
   6  * Copyright 2001 MontaVista Software Inc.
   7  * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
   8  *
   9  * arch/mips/momentum/ocelot_g/pci.c
  10  *     Board-specific PCI routines for gt64240 controller.
  11  *
  12  * This program is free software; you can redistribute  it and/or modify it
  13  * under  the terms of  the GNU General  Public License as published by the
  14  * Free Software Foundation;  either version 2 of the  License, or (at your
  15  * option) any later version.
  16  */
  17 #include <linux/types.h>
  18 #include <linux/pci.h>
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <asm/pci.h>
  22
  23
  24 void __devinit gt64240_board_pcibios_fixup_bus(struct pci_bus *bus)
  25 {
  26         struct pci_bus *current_bus = bus;
  27         struct pci_dev *devices;
  28         struct list_head *devices_link;
  29         u16 cmd;
  30
  31         /* loop over all known devices on this bus */
  32         list_for_each(devices_link, &(current_bus->devices)) {
  33
  34                 devices = pci_dev_b(devices_link);
  35                 if (devices == NULL)
  36                         continue;
  37
  38                 if ((current_bus->number == 0) &&
  39                                 PCI_SLOT(devices->devfn) == 1) {
  40                         /* Intel 82543 Gigabit MAC */
  41                         devices->irq = 2;       /* irq_nr is 2 for INT0 */
  42                 } else if ((current_bus->number == 0) &&
  43                                 PCI_SLOT(devices->devfn) == 2) {
  44                         /* Intel 82543 Gigabit MAC */
  45                         devices->irq = 3;       /* irq_nr is 3 for INT1 */
  46                 } else if ((current_bus->number == 1) &&
  47                                 PCI_SLOT(devices->devfn) == 3) {
  48                         /* Intel 21555 bridge */
  49                         devices->irq = 5;       /* irq_nr is 8 for INT6 */
  50                 } else if ((current_bus->number == 1) &&
  51                                 PCI_SLOT(devices->devfn) == 4) {
  52                         /* PMC Slot */
  53                         devices->irq = 9;       /* irq_nr is 9 for INT7 */
  54                 } else {
  55                         /* We don't have assign interrupts for other devices. */
  56                         devices->irq = 0xff;
  57                 }
  58
  59                 /* Assign an interrupt number for the device */
  60                 bus->ops->write(current_bus, devices,
  61                         PCI_INTERRUPT_LINE, 1, devices->irq);
  62
  63                 /* enable master for everything but the GT-64240 */
  64                 if (((current_bus->number != 0) && (current_bus->number != 1))
  65                                 || (PCI_SLOT(devices->devfn) != 0)) {
  66                         bus->ops->read(current_bus, devices,
  67                                         PCI_COMMAND, 2, &cmd);
  68                         cmd |= PCI_COMMAND_MASTER;
  69                         bus->ops->write(current_bus, devices,
  70                                         PCI_COMMAND, 2, cmd);
  71                 }
  72         }
  73 }