1 /*- 2 * Copyright (c) 2006 Bernd Walter. All rights reserved. 3 * Copyright (c) 2006 M. Warner Losh. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * Portions of this software may have been developed with reference to 26 * the SD Simplified Specification. The following disclaimer may apply: 27 * 28 * The following conditions apply to the release of the simplified 29 * specification ("Simplified Specification") by the SD Card Association and 30 * the SD Group. The Simplified Specification is a subset of the complete SD 31 * Specification which is owned by the SD Card Association and the SD 32 * Group. This Simplified Specification is provided on a non-confidential 33 * basis subject to the disclaimers below. Any implementation of the 34 * Simplified Specification may require a license from the SD Card 35 * Association, SD Group, SD-3C LLC or other third parties. 36 * 37 * Disclaimers: 38 * 39 * The information contained in the Simplified Specification is presented only 40 * as a standard specification for SD Cards and SD Host/Ancillary products and 41 * is provided "AS-IS" without any representations or warranties of any 42 * kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD 43 * Card Association for any damages, any infringements of patents or other 44 * right of the SD Group, SD-3C LLC, the SD Card Association or any third 45 * parties, which may result from its use. No license is granted by 46 * implication, estoppel or otherwise under any patent or other rights of the 47 * SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing 48 * herein shall be construed as an obligation by the SD Group, the SD-3C LLC 49 * or the SD Card Association to disclose or distribute any technical 50 * information, know-how or other confidential information to any third party. 51 */ 52 53 #include <sys/cdefs.h> 54 __FBSDID("$FreeBSD$"); 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/bio.h> 59 #include <sys/bus.h> 60 #include <sys/conf.h> 61 #include <sys/kernel.h> 62 #include <sys/kthread.h> 63 #include <sys/lock.h> 64 #include <sys/malloc.h> 65 #include <sys/module.h> 66 #include <sys/mutex.h> 67 #include <sys/time.h> 68 #include <geom/geom_disk.h> 69 70 #include <dev/mmc/mmcbrvar.h> 71 #include <dev/mmc/mmcreg.h> 72 #include <dev/mmc/mmcvar.h> 73 74 #include "mmcbus_if.h" 75 76 #if __FreeBSD_version < 800002 77 #define kproc_create kthread_create 78 #define kproc_exit kthread_exit 79 #endif 80 81 struct mmcsd_softc { 82 device_t dev; 83 struct mtx sc_mtx; 84 struct disk *disk; 85 struct proc *p; 86 struct bio_queue_head bio_queue; 87 daddr_t eblock, eend; /* Range remaining after the last erase. */ 88 int running; 89 int suspend; 90 int log_count; 91 struct timeval log_time; 92 }; 93 94 static const char *errmsg[] = 95 { 96 "None", 97 "Timeout", 98 "Bad CRC", 99 "Fifo", 100 "Failed", 101 "Invalid", 102 "NO MEMORY" 103 }; 104 105 #define LOG_PPS 5 /* Log no more than 5 errors per second. */ 106 107 /* bus entry points */ 108 static int mmcsd_attach(device_t dev); 109 static int mmcsd_detach(device_t dev); 110 static int mmcsd_probe(device_t dev); 111 112 /* disk routines */ 113 static int mmcsd_close(struct disk *dp); 114 static int mmcsd_dump(void *arg, void *virtual, vm_offset_t physical, 115 off_t offset, size_t length); 116 static int mmcsd_open(struct disk *dp); 117 static void mmcsd_strategy(struct bio *bp); 118 static void mmcsd_task(void *arg); 119 120 static int mmcsd_bus_bit_width(device_t dev); 121 static daddr_t mmcsd_delete(struct mmcsd_softc *sc, struct bio *bp); 122 static daddr_t mmcsd_rw(struct mmcsd_softc *sc, struct bio *bp); 123 124 #define MMCSD_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 125 #define MMCSD_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 126 #define MMCSD_LOCK_INIT(_sc) \ 127 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ 128 "mmcsd", MTX_DEF) 129 #define MMCSD_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 130 #define MMCSD_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 131 #define MMCSD_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 132 133 static int 134 mmcsd_probe(device_t dev) 135 { 136 137 device_quiet(dev); 138 device_set_desc(dev, "MMC/SD Memory Card"); 139 return (0); 140 } 141 142 static int 143 mmcsd_attach(device_t dev) 144 { 145 struct mmcsd_softc *sc; 146 struct disk *d; 147 intmax_t mb; 148 uint32_t speed; 149 uint32_t maxblocks; 150 char unit; 151 152 sc = device_get_softc(dev); 153 sc->dev = dev; 154 MMCSD_LOCK_INIT(sc); 155 156 d = sc->disk = disk_alloc(); 157 d->d_open = mmcsd_open; 158 d->d_close = mmcsd_close; 159 d->d_strategy = mmcsd_strategy; 160 d->d_dump = mmcsd_dump; 161 d->d_name = "mmcsd"; 162 d->d_drv1 = sc; 163 d->d_sectorsize = mmc_get_sector_size(dev); 164 d->d_maxsize = mmc_get_max_data(dev) * d->d_sectorsize; 165 d->d_mediasize = (off_t)mmc_get_media_size(dev) * d->d_sectorsize; 166 d->d_stripeoffset = 0; 167 d->d_stripesize = mmc_get_erase_sector(dev) * d->d_sectorsize; 168 d->d_unit = device_get_unit(dev); 169 d->d_flags = DISKFLAG_CANDELETE; 170 d->d_delmaxsize = mmc_get_erase_sector(dev) * d->d_sectorsize * 1; /* conservative */ 171 /* 172 * The d_fw* values are fake. However, layout is aided by making the 173 * number of fwsectors equal to the erase sectors from the drive since 174 * we set the stripe size equal to that. We set fwheads such that there 175 * are ~20 cylinder groups since all values are somewhat arbitrary here 176 * and this gives good behavior with ffs without wasting too much 177 * space. Sadly, geom_part wants to round partitions to these 178 * values. While not bad, in and of itself, the values we present here 179 * will almost certainly be different then the values that USB SD 180 * adapters use and there's too much variation between brands to just 181 * use those values here. Also SD to ATA adapters favor traditional 182 * ata sizes, which are different again from the USB adapters (which 183 * favor SCSI values). This rounding leads to a loss of up to 5% of the 184 * usable space (usually much less, but that's why 20 was selected: to 185 * limit this effect at a few percent). gpart needs a way to override 186 * this behavior for situations like this, but doesn't provide 187 * one. Perhaps this behavior should be tunable as well, but maybe that 188 * belongs in the disk layer. These values will be much better than 189 * the default ones. 190 */ 191 d->d_fwsectors = mmc_get_erase_sector(dev); 192 d->d_fwheads = mmc_get_media_size(dev) / (d->d_fwsectors * 20); 193 strlcpy(d->d_ident, mmc_get_card_sn_string(dev), sizeof(d->d_ident)); 194 strlcpy(d->d_descr, mmc_get_card_id_string(dev), sizeof(d->d_descr)); 195 196 /* 197 * Display in most natural units. There's no cards < 1MB. The SD 198 * standard goes to 2GiB due to its reliance on FAT, but the data 199 * format supports up to 4GiB and some card makers push it up to this 200 * limit. The SDHC standard only goes to 32GiB due to FAT32, but the 201 * data format supports up to 2TiB however. 2048GB isn't too ugly, so 202 * we note it in passing here and don't add the code to print 203 * TB). Since these cards are sold in terms of MB and GB not MiB and 204 * GiB, report them like that. We also round to the nearest unit, since 205 * many cards are a few percent short, even of the power of 10 size. 206 */ 207 mb = (d->d_mediasize + 1000000 / 2 - 1) / 1000000; 208 unit = 'M'; 209 if (mb >= 1000) { 210 unit = 'G'; 211 mb = (mb + 1000 / 2 - 1) / 1000; 212 } 213 /* 214 * Report the clock speed of the underlying hardware, which might be 215 * different than what the card reports due to hardware limitations. 216 * Report how many blocks the hardware transfers at once. 217 */ 218 speed = mmcbr_get_clock(device_get_parent(dev)); 219 maxblocks = mmc_get_max_data(dev); 220 device_printf(dev, "%ju%cB <%s>%s at %s %d.%01dMHz/%dbit/%d-block\n", 221 mb, unit, d->d_descr, 222 mmc_get_read_only(dev) ? " (read-only)" : "", 223 device_get_nameunit(device_get_parent(dev)), 224 speed / 1000000, (speed / 100000) % 10, 225 mmcsd_bus_bit_width(dev), maxblocks); 226 disk_create(d, DISK_VERSION); 227 bioq_init(&sc->bio_queue); 228 229 sc->running = 1; 230 sc->suspend = 0; 231 sc->eblock = sc->eend = 0; 232 kproc_create(&mmcsd_task, sc, &sc->p, 0, 0, "%s: mmc/sd card", 233 device_get_nameunit(dev)); 234 235 return (0); 236 } 237 238 static int 239 mmcsd_detach(device_t dev) 240 { 241 struct mmcsd_softc *sc = device_get_softc(dev); 242 243 MMCSD_LOCK(sc); 244 sc->suspend = 0; 245 if (sc->running > 0) { 246 /* kill thread */ 247 sc->running = 0; 248 wakeup(sc); 249 /* wait for thread to finish. */ 250 while (sc->running != -1) 251 msleep(sc, &sc->sc_mtx, 0, "detach", 0); 252 } 253 MMCSD_UNLOCK(sc); 254 255 /* Flush the request queue. */ 256 bioq_flush(&sc->bio_queue, NULL, ENXIO); 257 /* kill disk */ 258 disk_destroy(sc->disk); 259 260 MMCSD_LOCK_DESTROY(sc); 261 262 return (0); 263 } 264 265 static int 266 mmcsd_suspend(device_t dev) 267 { 268 struct mmcsd_softc *sc = device_get_softc(dev); 269 270 MMCSD_LOCK(sc); 271 sc->suspend = 1; 272 if (sc->running > 0) { 273 /* kill thread */ 274 sc->running = 0; 275 wakeup(sc); 276 /* wait for thread to finish. */ 277 while (sc->running != -1) 278 msleep(sc, &sc->sc_mtx, 0, "detach", 0); 279 } 280 MMCSD_UNLOCK(sc); 281 return (0); 282 } 283 284 static int 285 mmcsd_resume(device_t dev) 286 { 287 struct mmcsd_softc *sc = device_get_softc(dev); 288 289 MMCSD_LOCK(sc); 290 sc->suspend = 0; 291 if (sc->running <= 0) { 292 sc->running = 1; 293 MMCSD_UNLOCK(sc); 294 kproc_create(&mmcsd_task, sc, &sc->p, 0, 0, "%s: mmc/sd card", 295 device_get_nameunit(dev)); 296 } else 297 MMCSD_UNLOCK(sc); 298 return (0); 299 } 300 301 static int 302 mmcsd_open(struct disk *dp) 303 { 304 305 return (0); 306 } 307 308 static int 309 mmcsd_close(struct disk *dp) 310 { 311 312 return (0); 313 } 314 315 static void 316 mmcsd_strategy(struct bio *bp) 317 { 318 struct mmcsd_softc *sc; 319 320 sc = (struct mmcsd_softc *)bp->bio_disk->d_drv1; 321 MMCSD_LOCK(sc); 322 if (sc->running > 0 || sc->suspend > 0) { 323 bioq_disksort(&sc->bio_queue, bp); 324 MMCSD_UNLOCK(sc); 325 wakeup(sc); 326 } else { 327 MMCSD_UNLOCK(sc); 328 biofinish(bp, NULL, ENXIO); 329 } 330 } 331 332 static const char * 333 mmcsd_errmsg(int e) 334 { 335 if (e < 0 || e > MMC_ERR_MAX) 336 return "Bad error code"; 337 return errmsg[e]; 338 } 339 340 static daddr_t 341 mmcsd_rw(struct mmcsd_softc *sc, struct bio *bp) 342 { 343 daddr_t block, end; 344 struct mmc_command cmd; 345 struct mmc_command stop; 346 struct mmc_request req; 347 struct mmc_data data; 348 device_t dev = sc->dev; 349 int sz = sc->disk->d_sectorsize; 350 device_t mmcbr = device_get_parent(dev); 351 352 block = bp->bio_pblkno; 353 end = bp->bio_pblkno + (bp->bio_bcount / sz); 354 while (block < end) { 355 char *vaddr = bp->bio_data + 356 (block - bp->bio_pblkno) * sz; 357 int numblocks = min(end - block, mmc_get_max_data(dev)); 358 memset(&req, 0, sizeof(req)); 359 memset(&cmd, 0, sizeof(cmd)); 360 memset(&stop, 0, sizeof(stop)); 361 memset(&data, 0, sizeof(data)); 362 cmd.mrq = &req; 363 req.cmd = &cmd; 364 cmd.data = &data; 365 if (bp->bio_cmd == BIO_READ) { 366 if (numblocks > 1) 367 cmd.opcode = MMC_READ_MULTIPLE_BLOCK; 368 else 369 cmd.opcode = MMC_READ_SINGLE_BLOCK; 370 } else { 371 if (numblocks > 1) 372 cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK; 373 else 374 cmd.opcode = MMC_WRITE_BLOCK; 375 } 376 cmd.arg = block; 377 if (!mmc_get_high_cap(dev)) 378 cmd.arg <<= 9; 379 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 380 data.data = vaddr; 381 data.mrq = &req; 382 if (bp->bio_cmd == BIO_READ) 383 data.flags = MMC_DATA_READ; 384 else 385 data.flags = MMC_DATA_WRITE; 386 data.len = numblocks * sz; 387 if (numblocks > 1) { 388 data.flags |= MMC_DATA_MULTI; 389 stop.opcode = MMC_STOP_TRANSMISSION; 390 stop.arg = 0; 391 stop.flags = MMC_RSP_R1B | MMC_CMD_AC; 392 stop.mrq = &req; 393 req.stop = &stop; 394 } 395 MMCBUS_WAIT_FOR_REQUEST(mmcbr, dev, &req); 396 if (req.cmd->error != MMC_ERR_NONE) { 397 if (ppsratecheck(&sc->log_time, &sc->log_count, LOG_PPS)) { 398 device_printf(dev, "Error indicated: %d %s\n", 399 req.cmd->error, mmcsd_errmsg(req.cmd->error)); 400 } 401 break; 402 } 403 block += numblocks; 404 } 405 return (block); 406 } 407 408 static daddr_t 409 mmcsd_delete(struct mmcsd_softc *sc, struct bio *bp) 410 { 411 daddr_t block, end, start, stop; 412 struct mmc_command cmd; 413 struct mmc_request req; 414 device_t dev = sc->dev; 415 int sz = sc->disk->d_sectorsize; 416 int erase_sector; 417 device_t mmcbr = device_get_parent(dev); 418 419 block = bp->bio_pblkno; 420 end = bp->bio_pblkno + (bp->bio_bcount / sz); 421 /* Coalesce with part remaining from previous request. */ 422 if (block > sc->eblock && block <= sc->eend) 423 block = sc->eblock; 424 if (end >= sc->eblock && end < sc->eend) 425 end = sc->eend; 426 /* Safe round to the erase sector boundaries. */ 427 erase_sector = mmc_get_erase_sector(dev); 428 start = block + erase_sector - 1; /* Round up. */ 429 start -= start % erase_sector; 430 stop = end; /* Round down. */ 431 stop -= end % erase_sector; 432 /* We can't erase area smaller then sector, store it for later. */ 433 if (start >= stop) { 434 sc->eblock = block; 435 sc->eend = end; 436 return (end); 437 } 438 439 /* Set erase start position. */ 440 memset(&req, 0, sizeof(req)); 441 memset(&cmd, 0, sizeof(cmd)); 442 cmd.mrq = &req; 443 req.cmd = &cmd; 444 if (mmc_get_card_type(dev) == mode_sd) 445 cmd.opcode = SD_ERASE_WR_BLK_START; 446 else 447 cmd.opcode = MMC_ERASE_GROUP_START; 448 cmd.arg = start; 449 if (!mmc_get_high_cap(dev)) 450 cmd.arg <<= 9; 451 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 452 MMCBUS_WAIT_FOR_REQUEST(mmcbr, dev, &req); 453 if (req.cmd->error != MMC_ERR_NONE) { 454 printf("erase err1: %d\n", req.cmd->error); 455 return (block); 456 } 457 /* Set erase stop position. */ 458 memset(&req, 0, sizeof(req)); 459 memset(&cmd, 0, sizeof(cmd)); 460 req.cmd = &cmd; 461 if (mmc_get_card_type(dev) == mode_sd) 462 cmd.opcode = SD_ERASE_WR_BLK_END; 463 else 464 cmd.opcode = MMC_ERASE_GROUP_END; 465 cmd.arg = stop; 466 if (!mmc_get_high_cap(dev)) 467 cmd.arg <<= 9; 468 cmd.arg--; 469 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 470 MMCBUS_WAIT_FOR_REQUEST(mmcbr, dev, &req); 471 if (req.cmd->error != MMC_ERR_NONE) { 472 printf("erase err2: %d\n", req.cmd->error); 473 return (block); 474 } 475 /* Erase range. */ 476 memset(&req, 0, sizeof(req)); 477 memset(&cmd, 0, sizeof(cmd)); 478 req.cmd = &cmd; 479 cmd.opcode = MMC_ERASE; 480 cmd.arg = 0; 481 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 482 MMCBUS_WAIT_FOR_REQUEST(mmcbr, dev, &req); 483 if (req.cmd->error != MMC_ERR_NONE) { 484 printf("erase err3 %d\n", req.cmd->error); 485 return (block); 486 } 487 /* Store one of remaining parts for the next call. */ 488 if (bp->bio_pblkno >= sc->eblock || block == start) { 489 sc->eblock = stop; /* Predict next forward. */ 490 sc->eend = end; 491 } else { 492 sc->eblock = block; /* Predict next backward. */ 493 sc->eend = start; 494 } 495 return (end); 496 } 497 498 static int 499 mmcsd_dump(void *arg, void *virtual, vm_offset_t physical, 500 off_t offset, size_t length) 501 { 502 struct disk *disk = arg; 503 struct mmcsd_softc *sc = (struct mmcsd_softc *)disk->d_drv1; 504 device_t dev = sc->dev; 505 struct bio bp; 506 daddr_t block, end; 507 device_t mmcbr = device_get_parent(dev); 508 509 /* length zero is special and really means flush buffers to media */ 510 if (!length) 511 return (0); 512 513 bzero(&bp, sizeof(struct bio)); 514 bp.bio_disk = disk; 515 bp.bio_pblkno = offset / disk->d_sectorsize; 516 bp.bio_bcount = length; 517 bp.bio_data = virtual; 518 bp.bio_cmd = BIO_WRITE; 519 end = bp.bio_pblkno + bp.bio_bcount / sc->disk->d_sectorsize; 520 MMCBUS_ACQUIRE_BUS(mmcbr, dev); 521 block = mmcsd_rw(sc, &bp); 522 MMCBUS_RELEASE_BUS(mmcbr, dev); 523 return ((end < block) ? EIO : 0); 524 } 525 526 static void 527 mmcsd_task(void *arg) 528 { 529 struct mmcsd_softc *sc = (struct mmcsd_softc*)arg; 530 struct bio *bp; 531 int sz; 532 daddr_t block, end; 533 device_t dev = sc->dev; 534 device_t mmcbr = device_get_parent(sc->dev); 535 536 while (1) { 537 MMCSD_LOCK(sc); 538 do { 539 if (sc->running == 0) 540 goto out; 541 bp = bioq_takefirst(&sc->bio_queue); 542 if (bp == NULL) 543 msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0); 544 } while (bp == NULL); 545 MMCSD_UNLOCK(sc); 546 if (bp->bio_cmd != BIO_READ && mmc_get_read_only(dev)) { 547 bp->bio_error = EROFS; 548 bp->bio_resid = bp->bio_bcount; 549 bp->bio_flags |= BIO_ERROR; 550 biodone(bp); 551 continue; 552 } 553 MMCBUS_ACQUIRE_BUS(mmcbr, dev); 554 sz = sc->disk->d_sectorsize; 555 block = bp->bio_pblkno; 556 end = bp->bio_pblkno + (bp->bio_bcount / sz); 557 if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) { 558 /* Access to the remaining erase block obsoletes it. */ 559 if (block < sc->eend && end > sc->eblock) 560 sc->eblock = sc->eend = 0; 561 block = mmcsd_rw(sc, bp); 562 } else if (bp->bio_cmd == BIO_DELETE) { 563 block = mmcsd_delete(sc, bp); 564 } 565 MMCBUS_RELEASE_BUS(mmcbr, dev); 566 if (block < end) { 567 bp->bio_error = EIO; 568 bp->bio_resid = (end - block) * sz; 569 bp->bio_flags |= BIO_ERROR; 570 } 571 biodone(bp); 572 } 573 out: 574 /* tell parent we're done */ 575 sc->running = -1; 576 MMCSD_UNLOCK(sc); 577 wakeup(sc); 578 579 kproc_exit(0); 580 } 581 582 static int 583 mmcsd_bus_bit_width(device_t dev) 584 { 585 586 if (mmc_get_bus_width(dev) == bus_width_1) 587 return (1); 588 if (mmc_get_bus_width(dev) == bus_width_4) 589 return (4); 590 return (8); 591 } 592 593 static device_method_t mmcsd_methods[] = { 594 DEVMETHOD(device_probe, mmcsd_probe), 595 DEVMETHOD(device_attach, mmcsd_attach), 596 DEVMETHOD(device_detach, mmcsd_detach), 597 DEVMETHOD(device_suspend, mmcsd_suspend), 598 DEVMETHOD(device_resume, mmcsd_resume), 599 DEVMETHOD_END 600 }; 601 602 static driver_t mmcsd_driver = { 603 "mmcsd", 604 mmcsd_methods, 605 sizeof(struct mmcsd_softc), 606 }; 607 static devclass_t mmcsd_devclass; 608 609 DRIVER_MODULE(mmcsd, mmc, mmcsd_driver, mmcsd_devclass, NULL, NULL); 610