/* $NetBSD: pci_device.c,v 1.2 2003/03/08 09:53:45 lukem Exp $ */
/*
* Copyright 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS 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 WASABI SYSTEMS, INC
* 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.
*/
/*
* Interface to PCI config space registers for a specific PCI device.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: pci_device.c,v 1.2 2003/03/08 09:53:45 lukem Exp $");
#include <sys/types.h>
#include <sys/ioctl.h>
#include <pci.h>
#include <dev/pci/pciio.h>
/*
* pcidev_conf_read:
*
* Read a config word for a given bus/device/function.
*/
int
pcidev_conf_read(int fd, u_int reg, uint32_t *valp)
{
struct pciio_cfgreg r;
int rv;
r.reg = reg;
rv = ioctl(fd, PCI_IOC_CFGREAD, &r);
if (rv == -1) {
/* errno already set. */
return (-1);
}
*valp = r.val;
return (0);
}
/*
* pcidev_conf_write:
*
* Write a config word for a given bus/device/function.
*/
int
pcidev_conf_write(int fd, u_int reg, uint32_t val)
{
struct pciio_cfgreg r;
r.reg = reg;
r.val = val;
return (ioctl(fd, PCI_IOC_CFGWRITE, &r));
}
