1/* $NetBSD: devopen.c,v 1.7 2016/06/26 04:17:17 isaki Exp $ */ 2 3/* 4 * Copyright (c) 2001 Minoura Makoto 5 * 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/param.h> 30#include <sys/disklabel.h> 31#include <machine/bootinfo.h> 32#include <lib/libkern/libkern.h> 33#include <lib/libsa/stand.h> 34#include "libx68k.h" 35 36extern struct devspec devspec[]; /* defined in conf.c */ 37int devopen_open_dir = 0; 38 39/* 40 * Parse a device spec. 41 * 42 * [ha@]<dev><unit><part>:<file> 43 * ha - host adaptor ("spc0", "spc1", "mha0") 44 * dev - device name (e.g., "sd") 45 * unit - 0-7 46 * part - a-p 47 */ 48int 49devparse(const char *fname, int *ha, int *dev, int *unit, int *part, 50 char **file) 51{ 52 char const *s; 53 int i; 54 55 s = fname; 56 57 if (strncmp(s, "spc0@", 5) == 0) { 58 *ha = (X68K_BOOT_SCSIIF_SPC << 4) | 0; 59 s += 5; 60 } else if (strncmp(s, "spc1@", 5) == 0) { 61 *ha = (X68K_BOOT_SCSIIF_SPC << 4) | 1; 62 s += 5; 63 } else if (strncmp(s, "mha0@", 5) == 0) { 64 *ha = (X68K_BOOT_SCSIIF_MHA << 4) | 0; 65 s += 5; 66 } else { 67 *ha = 0; 68 } 69 70 for (i = 0; devspec[i].ds_name != 0; i++) { 71 if (strncmp (devspec[i].ds_name, s, 72 strlen(devspec[i].ds_name)) == 0) 73 break; 74 } 75 76 if (devspec[i].ds_name == 0) 77 return ENODEV; 78 s += strlen(devspec[i].ds_name); 79 *dev = devspec[i].ds_dev; 80 81 if (devspec[i].ds_net) { 82 *unit = 0; 83 *part = 0; 84 } else { 85 *unit = *s++ - '0'; 86 if (*unit < 0 || *unit > devspec[i].ds_maxunit) 87 /* bad unit */ 88 return ENODEV; 89 *part = *s++ - 'a'; 90 if (*part < 0 || *part > MAXPARTITIONS) 91 /* bad partition */ 92 return ENODEV; 93 } 94 95 if (*s++ != ':') 96 return ENODEV; 97 98 if (*s == '/') { 99 s++; 100 if (devopen_open_dir && *s == 0) 101 s--; 102 } 103 *file = __UNCONST(s); 104 105 return 0; 106} 107 108int 109devopen(struct open_file *f, const char *fname, char **file) 110{ 111 int error; 112 int ha, dev, unit, part; 113 struct devsw *dp = &devsw[0]; 114 115 error = devparse(fname, &ha, &dev, &unit, &part, file); 116 if (error) 117 return error; 118 119 dp = &devsw[dev]; 120 121 if (dp->dv_open == NULL) 122 return ENODEV; 123 124 f->f_dev = dp; 125 126 if ((error = (*dp->dv_open)(f, unit, part)) == 0) 127 return 0; 128 129 return error; 130} 131