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      1 /*	$NetBSD: pci_device.c,v 1.2 2003/03/08 09:53:45 lukem Exp $	*/
      2 
      3 /*
      4  * Copyright 2001 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 /*
     39  * Interface to PCI config space registers for a specific PCI device.
     40  */
     41 
     42 #include <sys/cdefs.h>
     43 __RCSID("$NetBSD: pci_device.c,v 1.2 2003/03/08 09:53:45 lukem Exp $");
     44 
     45 #include <sys/types.h>
     46 #include <sys/ioctl.h>
     47 
     48 #include <pci.h>
     49 
     50 #include <dev/pci/pciio.h>
     51 
     52 /*
     53  * pcidev_conf_read:
     54  *
     55  *	Read a config word for a given bus/device/function.
     56  */
     57 int
     58 pcidev_conf_read(int fd, u_int reg, uint32_t *valp)
     59 {
     60 	struct pciio_cfgreg r;
     61 	int rv;
     62 
     63 	r.reg = reg;
     64 
     65 	rv = ioctl(fd, PCI_IOC_CFGREAD, &r);
     66 	if (rv == -1) {
     67 		/* errno already set. */
     68 		return (-1);
     69 	}
     70 
     71 	*valp = r.val;
     72 	return (0);
     73 }
     74 
     75 /*
     76  * pcidev_conf_write:
     77  *
     78  *	Write a config word for a given bus/device/function.
     79  */
     80 int
     81 pcidev_conf_write(int fd, u_int reg, uint32_t val)
     82 {
     83 	struct pciio_cfgreg r;
     84 
     85 	r.reg = reg;
     86 	r.val = val;
     87 
     88 	return (ioctl(fd, PCI_IOC_CFGWRITE, &r));
     89 }
     90