1 /* $NetBSD: pci_user.c,v 1.1 1998/05/15 17:07:16 drochner Exp $ */ 2 3 /* 4 * Copyright (c) 1998 5 * Matthias Drochner. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by Matthias Drochner. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 #include "sanamespace.h" 36 37 #include <sys/types.h> 38 #include <machine/pio.h> 39 40 #include <pcivar.h> 41 42 extern int mapio __P((void)); 43 44 /* 45 * Replacement for i386/stand/lib/biospci.c. 46 * Very simple functions to access PCI config space from 47 * userland. Works with configuration mode 1 only, can 48 * only access bus number 0. 49 */ 50 51 #define PCI_MODE1_ENABLE 0x80000000UL 52 #define PCI_MODE1_ADDRESS_REG 0x0cf8 53 #define PCI_MODE1_DATA_REG 0x0cfc 54 55 static int 56 maketag(bus, dev, fcn) 57 int bus, dev, fcn; 58 { 59 return (PCI_MODE1_ENABLE | 60 (bus << 16) | (dev << 11) | (fcn << 8)); 61 } 62 63 int 64 pcicheck() 65 { 66 return (mapio() ? -1 : 0); 67 } 68 69 int 70 pcifinddev(vid, did, handle) 71 int vid, did; 72 pcihdl_t *handle; 73 { 74 int i; 75 for (i = 0; i < 32; i++) { 76 pcihdl_t h; 77 int id; 78 h = maketag(0, i, 0); 79 pcicfgread(&h, 0, &id); 80 if (id == (vid | (did << 16))) { 81 *handle = h; 82 return (0); 83 } 84 } 85 return (-1); 86 } 87 88 int 89 pcicfgread(handle, off, val) 90 pcihdl_t *handle; 91 int off; 92 int *val; 93 { 94 int data; 95 96 outl(PCI_MODE1_ADDRESS_REG, *handle | off); 97 data = inl(PCI_MODE1_DATA_REG); 98 outl(PCI_MODE1_ADDRESS_REG, 0); 99 *val = data; 100 return (0); 101 } 102 103 int 104 pcicfgwrite(handle, off, val) 105 pcihdl_t *handle; 106 int off; 107 int val; 108 { 109 outl(PCI_MODE1_ADDRESS_REG, *handle | off); 110 outl(PCI_MODE1_DATA_REG, val); 111 outl(PCI_MODE1_ADDRESS_REG, 0); 112 return (0); 113 } 114