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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mips/pci/fixup-rc32434.c
10817 views
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/*

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 * Copyright 2001 MontaVista Software Inc.

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 * Author: MontaVista Software, Inc.

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 *         	[email protected] or [email protected]

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 *

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 *  This program is free software; you can redistribute  it and/or modify it

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 *  under  the terms of  the GNU General  Public License as published by the

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 *  Free Software Foundation;  either version 2 of the  License, or (at your

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 *  option) any later version.

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 *

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 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED

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 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF

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 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN

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 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,

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 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

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 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF

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 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON

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 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT

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 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

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 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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 *

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 *  You should have received a copy of the  GNU General Public License along

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 *  with this program; if not, write  to the Free Software Foundation, Inc.,

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 *  675 Mass Ave, Cambridge, MA 02139, USA.

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 */

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#include <linux/types.h>

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#include <linux/pci.h>

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#include <linux/kernel.h>

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#include <linux/init.h>

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#include <asm/mach-rc32434/rc32434.h>

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#include <asm/mach-rc32434/irq.h>

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static int __devinitdata irq_map[2][12] = {

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	{0, 0, 2, 3, 2, 3, 0, 0, 0, 0, 0, 1},

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	{0, 0, 1, 3, 0, 2, 1, 3, 0, 2, 1, 3}

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};

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int __devinit pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)

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{

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	int irq = 0;

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	if (dev->bus->number < 2 && PCI_SLOT(dev->devfn) < 12)

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		irq = irq_map[dev->bus->number][PCI_SLOT(dev->devfn)];

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	return irq + GROUP4_IRQ_BASE + 4;

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}

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static void rc32434_pci_early_fixup(struct pci_dev *dev)

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{

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	if (PCI_SLOT(dev->devfn) == 6 && dev->bus->number == 0) {

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		/* disable prefetched memory range */

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		pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, 0);

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		pci_write_config_word(dev, PCI_PREF_MEMORY_BASE, 0x10);

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		pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 4);

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	}

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}

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/*

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 * The fixup applies to both the IDT and VIA devices present on the board

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 */

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DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, rc32434_pci_early_fixup);

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/* Do platform specific device initialization at pci_enable_device() time */

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int pcibios_plat_dev_init(struct pci_dev *dev)

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{

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	return 0;

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}

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