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