arch/mips/pci/fixup-ocelot.c

   1 /*
   2  * Copyright 2001 MontaVista Software Inc.
   3  * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
   4  *
   5  * arch/mips/gt64120/momenco_ocelot/pci.c
   6  *     Board-specific PCI routines for gt64120 controller.
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13 #include <linux/types.h>
  14 #include <linux/pci.h>
  15 #include <linux/kernel.h>
  16 #include <linux/version.h>
  17 #include <linux/init.h>
  18 #include <asm/pci.h>
  19
  20
  21 void __devinit gt64120_board_pcibios_fixup_bus(struct pci_bus *bus)
  22 {
  23         struct pci_bus *current_bus = bus;
  24         struct pci_dev *devices;
  25         struct list_head *devices_link;
  26         u16 cmd;
  27
  28         list_for_each(devices_link, &(current_bus->devices)) {
  29
  30                 devices = pci_dev_b(devices_link);
  31                 if (devices == NULL)
  32                         continue;
  33
  34                 if (PCI_SLOT(devices->devfn) == 1) {
  35                         /*
  36                          * Slot 1 is primary ether port, i82559
  37                          * we double-check against that assumption
  38                          */
  39                         if ((devices->vendor != 0x8086) ||
  40                             (devices->device != 0x1209)) {
  41                                 panic
  42                                     ("gt64120_board_pcibios_fixup_bus: found "
  43                                      "unexpected PCI device in slot 1.");
  44                         }
  45                         devices->irq = 2;       /* irq_nr is 2 for INT0 */
  46                 } else if (PCI_SLOT(devices->devfn) == 2) {
  47                         /*
  48                          * Slot 2 is secondary ether port, i21143
  49                          * we double-check against that assumption
  50                          */
  51                         if ((devices->vendor != 0x1011) ||
  52                             (devices->device != 0x19)) {
  53                                 panic("galileo_pcibios_fixup_bus: "
  54                                       "found unexpected PCI device in slot 2.");
  55                         }
  56                         devices->irq = 3;       /* irq_nr is 3 for INT1 */
  57                 } else if (PCI_SLOT(devices->devfn) == 4) {
  58                         /* PMC Slot 1 */
  59                         devices->irq = 8;       /* irq_nr is 8 for INT6 */
  60                 } else if (PCI_SLOT(devices->devfn) == 5) {
  61                         /* PMC Slot 1 */
  62                         devices->irq = 9;       /* irq_nr is 9 for INT7 */
  63                 } else {
  64                         /* We don't have assign interrupts for other devices. */
  65                         devices->irq = 0xff;
  66                 }
  67
  68                 /* Assign an interrupt number for the device */
  69                 bus->ops->write_byte(devices, PCI_INTERRUPT_LINE,
  70                                      devices->irq);
  71
  72                 /* enable master */
  73                 bus->ops->read_word(devices, PCI_COMMAND, &cmd);
  74                 cmd |= PCI_COMMAND_MASTER;
  75                 bus->ops->write_word(devices, PCI_COMMAND, cmd);
  76         }
  77 }