/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/bus/netbsdPci.c,v 1.5 2004/02/13 23:58:47 dawes Exp $ */
/*
 * Copyright (C) 1994-2003 The XFree86 Project, Inc.
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject
 * to the following conditions:
 *
 *   1.  Redistributions of source code must retain the above copyright
 *       notice, this list of conditions, and the following disclaimer.
 *
 *   2.  Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer
 *       in the documentation and/or other materials provided with the
 *       distribution, and in the same place and form as other copyright,
 *       license and disclaimer information.
 *
 *   3.  The end-user documentation included with the redistribution,
 *       if any, must include the following acknowledgment: "This product
 *       includes software developed by The XFree86 Project, Inc
 *       (http://www.xfree86.org/) and its contributors", in the same
 *       place and form as other third-party acknowledgments.  Alternately,
 *       this acknowledgment may appear in the software itself, in the
 *       same form and location as other such third-party acknowledgments.
 *
 *   4.  Except as contained in this notice, the name of The XFree86
 *       Project, Inc shall not be used in advertising or otherwise to
 *       promote the sale, use or other dealings in this Software without
 *       prior written authorization from The XFree86 Project, Inc.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE XFREE86 PROJECT, INC OR ITS CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <dev/pci/pciio.h>

#include "xf86.h"
#include "xf86Priv.h"
#include "xf86OSpriv.h"

#include "Pci.h"

static CARD32 netbsdPciConfRead(PCITAG, int);
static void netbsdPciConfWrite(PCITAG, int, CARD32);
static void netbsdPciSetBits(PCITAG, int, CARD32, CARD32);

static int devpci = -1;

static pciBusFuncs_t netbsdFuncs0 = {
/* pciReadLong      */	netbsdPciConfRead,
/* pciWriteLong     */	netbsdPciConfWrite,
/* pciSetBitsLong   */	netbsdPciSetBits,
/* pciAddrHostToBus */	pciAddrNOOP,
/* pciAddrBusToHost */	pciAddrNOOP
};

static pciBusInfo_t netbsdPci0 = {
/* configMech  */	PCI_CFG_MECH_OTHER,
/* numDevices  */	32,
/* secondary   */	FALSE,
/* primary_bus */	0,
/* funcs       */	&netbsdFuncs0,
/* pciBusPriv  */	NULL,
/* bridge      */	NULL
};

void
netbsdPciInit()
{
	struct pciio_businfo pci_businfo;

	devpci = open("/dev/pci0", O_RDWR);
	if (devpci == -1)
		FatalError("netbsdPciInit: can't open /dev/pci0\n");

	pciNumBuses    = 1;
	pciBusInfo[0]  = &netbsdPci0;
	pciFindFirstFP = pciGenFindFirst;
	pciFindNextFP  = pciGenFindNext;
	/* use businfo to get the number of devs */
	if (ioctl(devpci, PCI_IOC_BUSINFO, &pci_businfo) != 0)
	    FatalError("netbsdPciInit: not a PCI bus device");
	netbsdPci0.numDevices = pci_businfo.maxdevs;
}

static CARD32
netbsdPciConfRead(PCITAG tag, int reg)
{
	struct pciio_bdf_cfgreg bdfr;

	bdfr.bus      = PCI_BUS_FROM_TAG(tag);
	bdfr.device   = PCI_DEV_FROM_TAG(tag);
	bdfr.function = PCI_FUNC_FROM_TAG(tag);
	bdfr.cfgreg.reg = reg;

	if (ioctl(devpci, PCI_IOC_BDF_CFGREAD, &bdfr) == -1)
		FatalError("netbsdPciConfRead: failed on %d/%d/%d\n",
		    bdfr.bus, bdfr.device, bdfr.function);

	return (bdfr.cfgreg.val);
}

static void
netbsdPciConfWrite(PCITAG tag, int reg, CARD32 val)
{
	struct pciio_bdf_cfgreg bdfr;

	bdfr.bus      = PCI_BUS_FROM_TAG(tag);
	bdfr.device   = PCI_DEV_FROM_TAG(tag);
	bdfr.function = PCI_FUNC_FROM_TAG(tag);
	bdfr.cfgreg.reg = reg;
	bdfr.cfgreg.val = val;

	if (ioctl(devpci, PCI_IOC_BDF_CFGWRITE, &bdfr) == -1)
		FatalError("netbsdPciConfWrite: failed on %d/%d/%d\n",
		    bdfr.bus, bdfr.device, bdfr.function);
}

static void
netbsdPciSetBits(PCITAG tag, int reg, CARD32 mask, CARD32 bits)
{
	CARD32 val;

	val = netbsdPciConfRead(tag, reg);
	val = (val & ~mask) | (bits & mask);
	netbsdPciConfWrite(tag, reg, val);
}