1 /* $NetBSD: sdcd.c,v 1.11 2011/07/17 20:54:49 joerg 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 ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/param.h> 29 #include <sys/disklabel.h> 30 #include <lib/libkern/libkern.h> 31 #include <lib/libsa/stand.h> 32 33 #include "libx68k.h" 34 #include "sdcdvar.h" 35 #include "iocs.h" 36 37 38 static int current_id = -1; 39 static int current_blklen, current_devsize, current_npart; 40 static struct boot_partinfo partitions[MAXPARTITIONS]; 41 42 static int readdisklabel(int); 43 static int check_unit(int); 44 45 #ifdef DEBUG 46 #define DPRINTF(x) printf x 47 #else 48 #define DPRINTF(x) 49 #endif 50 51 static int 52 check_unit(int id) 53 { 54 #define BUFFER_SIZE 8192 55 int error; 56 void *buffer = alloca(BUFFER_SIZE); 57 58 if (current_id == id) 59 return 0; 60 61 current_id = -1; 62 63 error = IOCS_S_TESTUNIT(id); 64 if (error < 0) { /* not ready */ 65 error = ENXIO; 66 goto out; 67 } 68 69 { 70 struct iocs_inquiry *inqdata = buffer; 71 72 error = IOCS_S_INQUIRY(100, id, inqdata); 73 if (error < 0) { /* WHY??? */ 74 error = ENXIO; 75 goto out; 76 } 77 if ((inqdata->unit != 0) && /* direct */ 78 (inqdata->unit != 7)) { /* optical */ 79 error = EUNIT; 80 goto out; 81 } 82 } 83 84 { 85 struct iocs_readcap *rcdata = buffer; 86 87 error = IOCS_S_READCAP(id, rcdata); 88 if (error < 0) { /* WHY??? */ 89 error = EUNIT; 90 goto out; 91 } 92 current_blklen = rcdata->size >> 9; 93 current_devsize = rcdata->block; 94 } 95 96 { 97 error = IOCS_S_READ(0, 1, id, current_blklen, buffer); 98 if (error < 0) { 99 error = EIO; 100 goto out; 101 } 102 if (strncmp((char *)buffer, "X68SCSI1", 8) != 0) { 103 error = EUNLAB; 104 goto out; 105 } 106 } 107 108 out: 109 return error; 110 } 111 112 static int 113 readdisklabel(int id) 114 { 115 int error, i; 116 char *buffer; 117 struct disklabel *label; 118 struct dos_partition *parttbl; 119 120 if (current_id == id) 121 return 0; 122 current_id = -1; 123 124 error = check_unit(id); 125 if (error) 126 return error; 127 if (current_blklen > 4) { 128 printf("FATAL: Unsupported block size %d.\n", 129 256 << current_blklen); 130 return ERDLAB; 131 } 132 133 /* Try BSD disklabel first */ 134 buffer = alloca(2048); 135 error = IOCS_S_READ(LABELSECTOR, 1, id, current_blklen, buffer); 136 if (error < 0) 137 return EIO; 138 label = (void *)(buffer + LABELOFFSET); 139 if (label->d_magic == DISKMAGIC && 140 label->d_magic2 == DISKMAGIC) { 141 for (i = 0; i < label->d_npartitions; i++) { 142 partitions[i].start = label->d_partitions[i].p_offset; 143 partitions[i].size = label->d_partitions[i].p_size; 144 } 145 current_npart = label->d_npartitions; 146 147 goto done; 148 } 149 150 /* Try Human68K-style partition table */ 151 #if 0 152 /* assumes 512byte/sec */ 153 error = IOCS_S_READ(DOSPARTOFF, 2, id, current_blklen, buffer); 154 #else 155 error = IOCS_S_READ(8 >> current_blklen, 8 >> current_blklen, 156 id, current_blklen, buffer); 157 #endif 158 if (error < 0) 159 return EIO; 160 parttbl = (void *)(buffer + DOSBBSECTOR); 161 if (strncmp(buffer, "X68K", 4) != 0) 162 return EUNLAB; 163 parttbl++; 164 for (current_npart = 0, i = 0; 165 current_npart < MAXPARTITIONS && i < 15 && parttbl[i].dp_size; 166 i++) { 167 partitions[current_npart].start 168 = parttbl[i].dp_start * 2; 169 partitions[current_npart].size 170 = parttbl[i].dp_size * 2; 171 if (++current_npart == RAW_PART) { 172 partitions[current_npart].start = 0; 173 partitions[current_npart].size = -1; /* XXX */ 174 current_npart++; 175 } 176 } 177 done: 178 #ifdef DEBUG 179 for (i = 0; i < current_npart; i++) { 180 printf ("%d: starts %d, size %d\n", i, 181 partitions[i].start, 182 partitions[i].size); 183 } 184 #endif 185 current_id = id; 186 187 return 0; 188 } 189 190 int 191 sd_getbsdpartition(int id, int humanpart) 192 { 193 int error, i; 194 char *buffer; 195 struct dos_partition *parttbl; 196 unsigned parttop; 197 198 if (humanpart < 2) 199 humanpart++; 200 201 error = readdisklabel(id); 202 if (error) { 203 printf("Reading disklabel: %s\n", strerror(error)); 204 return -1; 205 } 206 buffer = alloca(2048); 207 error = IOCS_S_READ(8 >> current_blklen, 8 >> current_blklen, 208 id, current_blklen, buffer); 209 if (error < 0) { 210 printf("Reading partition table: %s\n", strerror(error)); 211 return -1; 212 } 213 parttbl = (void *)(buffer + DOSBBSECTOR); 214 if (strncmp(buffer, "X68K", 4) != 0) 215 return 0; 216 parttop = parttbl[humanpart].dp_start; 217 parttop = parttop << (2 - current_blklen); 218 219 for (i = 0; i < current_npart; i++) { 220 if (partitions[i].start == parttop) 221 return i; 222 } 223 224 printf("Could not determine the boot partition.\n"); 225 226 return -1; 227 } 228 229 struct sdcd_softc { 230 int sc_part; 231 struct boot_partinfo sc_partinfo; 232 int sc_blocksize; 233 }; 234 235 /* sdopen(struct open_file *f, int id, int part) */ 236 int 237 sdopen(struct open_file *f, ...) 238 { 239 int error; 240 struct sdcd_softc *sc; 241 int id, part; 242 va_list ap; 243 244 va_start(ap, f); 245 id = va_arg(ap, int); 246 part = va_arg(ap, int); 247 va_end(ap); 248 249 if (id < 0 || id > 7) 250 return ENXIO; 251 if (current_id != id) { 252 error = readdisklabel(id); 253 if (error) 254 return error; 255 } 256 if (part >= current_npart) 257 return ENXIO; 258 259 sc = alloc(sizeof(struct sdcd_softc)); 260 sc->sc_part = part; 261 sc->sc_partinfo = partitions[part]; 262 sc->sc_blocksize = current_blklen << 9; 263 f->f_devdata = sc; 264 return 0; 265 } 266 267 int 268 sdclose(struct open_file *f) 269 { 270 271 dealloc(f->f_devdata, sizeof(struct sdcd_softc)); 272 return 0; 273 } 274 275 int 276 sdstrategy(void *arg, int rw, daddr_t dblk, size_t size, 277 void *buf, size_t *rsize) 278 { 279 struct sdcd_softc *sc = arg; 280 uint32_t start = sc->sc_partinfo.start + dblk; 281 size_t nblks; 282 int error; 283 284 if (size == 0) { 285 if (rsize) 286 *rsize = 0; 287 return 0; 288 } 289 nblks = howmany(size, 256 << current_blklen); 290 291 if ((dblk & 0x1fffff) == 0x1fffff && (nblks & 0xff) == nblks) { 292 if (rw & F_WRITE) 293 error = IOCS_S_WRITE(start, nblks, current_id, 294 current_blklen, buf); 295 else 296 error = IOCS_S_READ(start, nblks, current_id, 297 current_blklen, buf); 298 } else { 299 if (rw & F_WRITE) 300 error = IOCS_S_WRITEEXT(start, nblks, current_id, 301 current_blklen, buf); 302 else 303 error = IOCS_S_READEXT(start, nblks, current_id, 304 current_blklen, buf); 305 } 306 if (error < 0) 307 return EIO; 308 309 if (rsize) 310 *rsize = size; 311 return 0; 312 } 313 314 /* cdopen(struct open_file *f, int id, int part) */ 315 int 316 cdopen(struct open_file *f, ...) 317 { 318 int error; 319 struct sdcd_softc *sc; 320 int id, part; 321 va_list ap; 322 323 va_start(ap, f); 324 id = va_arg(ap, int); 325 part = va_arg(ap, int); 326 va_end(ap); 327 328 if (id < 0 || id > 7) 329 return ENXIO; 330 if (part == 0 || part == 2) 331 return ENXIO; 332 if (current_id != id) { 333 error = check_unit(id); 334 if (error) 335 return error; 336 } 337 338 sc = alloc(sizeof(struct sdcd_softc)); 339 current_npart = 3; 340 sc->sc_part = 0; 341 sc->sc_partinfo.size = current_devsize; 342 sc->sc_blocksize = current_blklen << 9; 343 f->f_devdata = sc; 344 return 0; 345 } 346 347 int 348 cdclose(struct open_file *f) 349 { 350 351 dealloc(f->f_devdata, sizeof(struct sdcd_softc)); 352 return 0; 353 } 354 355 int 356 cdstrategy(void *arg, int rw, daddr_t dblk, size_t size, 357 void *buf, size_t *rsize) 358 { 359 struct sdcd_softc *sc = arg; 360 361 return sdstrategy(arg, rw, dblk * DEV_BSIZE / sc->sc_blocksize, 362 size, buf, rsize); 363 } 364