arch/mips/pci/fixup-rc32434.c

   1 /*
   2  * Copyright 2001 MontaVista Software Inc.
   3  * Author: MontaVista Software, Inc.
   4  *              stevel@mvista.com or source@mvista.com
   5  *
   6  *  This program is free software; you can redistribute  it and/or modify it
   7  *  under  the terms of  the GNU General  Public License as published by the
   8  *  Free Software Foundation;  either version 2 of the  License, or (at your
   9  *  option) any later version.
  10  *
  11  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  12  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  13  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  14  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  15  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  16  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  17  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  18  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  19  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  20  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  21  *
  22  *  You should have received a copy of the  GNU General Public License along
  23  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  24  *  675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #include <linux/types.h>
  28 #include <linux/pci.h>
  29 #include <linux/kernel.h>
  30 #include <linux/init.h>
  31
  32 #include <asm/mach-rc32434/rc32434.h>
  33
  34 static int __devinitdata irq_map[2][12] = {
  35         {0, 0, 2, 3, 2, 3, 0, 0, 0, 0, 0, 1},
  36         {0, 0, 1, 3, 0, 2, 1, 3, 0, 2, 1, 3}
  37 };
  38
  39 int __devinit pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  40 {
  41         int irq = 0;
  42
  43         if (dev->bus->number < 2 && PCI_SLOT(dev->devfn) < 12)
  44                 irq = irq_map[dev->bus->number][PCI_SLOT(dev->devfn)];
  45
  46         return irq + GROUP4_IRQ_BASE + 4;
  47 }
  48
  49 static void rc32434_pci_early_fixup(struct pci_dev *dev)
  50 {
  51         if (PCI_SLOT(dev->devfn) == 6 && dev->bus->number == 0) {
  52                 /* disable prefetched memory range */
  53                 pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, 0);
  54                 pci_write_config_word(dev, PCI_PREF_MEMORY_BASE, 0x10);
  55
  56                 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 4);
  57         }
  58 }
  59
  60 /*
  61  * The fixup applies to both the IDT and VIA devices present on the board
  62  */
  63 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, rc32434_pci_early_fixup);
  64
  65 /* Do platform specific device initialization at pci_enable_device() time */
  66 int pcibios_plat_dev_init(struct pci_dev *dev)
  67 {
  68         return 0;
  69 }