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pci_device.c revision 1.1 
      1 /*	$NetBSD: pci_device.c,v 1.1 2001/09/13 22:52:20 thorpej 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/types.h>
     43 #include <sys/ioctl.h>
     44 
     45 #include <pci.h>
     46 
     47 #include <dev/pci/pciio.h>
     48 
     49 /*
     50  * pcidev_conf_read:
     51  *
     52  *	Read a config word for a given bus/device/function.
     53  */
     54 int
     55 pcidev_conf_read(int fd, u_int reg, uint32_t *valp)
     56 {
     57 	struct pciio_cfgreg r;
     58 	int rv;
     59 
     60 	r.reg = reg;
     61 
     62 	rv = ioctl(fd, PCI_IOC_CFGREAD, &r);
     63 	if (rv == -1) {
     64 		/* errno already set. */
     65 		return (-1);
     66 	}
     67 
     68 	*valp = r.val;
     69 	return (0);
     70 }
     71 
     72 /*
     73  * pcidev_conf_write:
     74  *
     75  *	Write a config word for a given bus/device/function.
     76  */
     77 int
     78 pcidev_conf_write(int fd, u_int reg, uint32_t val)
     79 {
     80 	struct pciio_cfgreg r;
     81 
     82 	r.reg = reg;
     83 	r.val = val;
     84 
     85 	return (ioctl(fd, PCI_IOC_CFGWRITE, &r));
     86 }
     87