arch/mips/pci/fixup-jaguar.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Marvell MV64340 interrupt fixup code.
   7  *
   8  * Marvell wants an NDA for their docs so this was written without
   9  * documentation.  You've been warned.
  10  *
  11  * Copyright (C) 2004 Ralf Baechle
  12  */
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/pci.h>
  16
  17 #include <asm/mipsregs.h>
  18 #include <asm/pci_channel.h>
  19
  20 /*
  21  * WARNING: Example of how _NOT_ to do it.
  22  */
  23 int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  24 {
  25         int bus = dev->bus->number;
  26
  27         if (bus == 0 && slot == 1)
  28                 return 3;       /* PCI-X A */
  29         if (bus == 0 && slot == 2)
  30                 return 4;       /* PCI-X B */
  31         if (bus == 1 && slot == 1)
  32                 return 5;       /* PCI A */
  33         if (bus == 1 && slot == 2)
  34                 return 6;       /* PCI B */
  35
  36 return 0;
  37         panic("Whooops in pcibios_map_irq");
  38 }