LXR linux/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
  31#include <asm/mach-rc32434/rc32434.h>
  32#include <asm/mach-rc32434/irq.h>
  33
  34static int 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
  39int 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
  49static 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 */
  63DECLARE_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 */
  66int pcibios_plat_dev_init(struct pci_dev *dev)
  67{
  68        return 0;
  69}
  70