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 <geom/geom_disk.h> 68 69 #include <dev/mmc/mmcbrvar.h> 70 #include <dev/mmc/mmcreg.h> 71 #include <dev/mmc/mmcvar.h> 72 73 #include "mmcbus_if.h" 74 75 #if __FreeBSD_version < 800002 76 #define kproc_create kthread_create 77 #define kproc_exit kthread_exit 78 #endif 79 80 struct mmcsd_softc { 81 device_t dev; 82 struct mtx sc_mtx; 83 struct disk *disk; 84 struct proc *p; 85 struct bio_queue_head bio_queue; 86 daddr_t eblock, eend; /* Range remaining after the last erase. */ 87 int running; 88 int suspend; 89 }; 90 91 static const char *errmsg[] = 92 { 93 "None", 94 "Timeout", 95 "Bad CRC", 96 "Fifo", 97 "Failed", 98 "Invalid", 99 "NO MEMORY" 100 }; 101 102 /* bus entry points */ 103 static int mmcsd_attach(device_t dev); 104 static int mmcsd_detach(device_t dev); 105 static int mmcsd_probe(device_t dev); 106 107 /* disk routines */ 108 static int mmcsd_close(struct disk *dp); 109 static int mmcsd_dump(void *arg, void *virtual, vm_offset_t physical, 110 off_t offset, size_t length); 111 static int mmcsd_open(struct disk *dp); 112 static void mmcsd_strategy(struct bio *bp); 113 static void mmcsd_task(void *arg); 114 115 static int mmcsd_bus_bit_width(device_t dev); 116 static daddr_t mmcsd_delete(struct mmcsd_softc *sc, struct bio *bp); 117 static daddr_t mmcsd_rw(struct mmcsd_softc *sc, struct bio *bp); 118 119 #define MMCSD_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 120 #define MMCSD_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 121 #define MMCSD_LOCK_INIT(_sc) \ 122 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ 123 "mmcsd", MTX_DEF) 124 #define MMCSD_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 125 #define MMCSD_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 126 #define MMCSD_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 127 128 static int 129 mmcsd_probe(device_t dev) 130 { 131 132 device_quiet(dev); 133 device_set_desc(dev, "MMC/SD Memory Card"); 134 return (0); 135 } 136 137 static int 138 mmcsd_attach(device_t dev) 139 { 140 struct mmcsd_softc *sc; 141 struct disk *d; 142 intmax_t mb; 143 uint32_t speed; 144 uint32_t maxblocks; 145 char unit; 146 147 sc = device_get_softc(dev); 148 sc->dev = dev; 149 MMCSD_LOCK_INIT(sc); 150 151 d = sc->disk = disk_alloc(); 152 d->d_open = mmcsd_open; 153 d->d_close = mmcsd_close; 154 d->d_strategy = mmcsd_strategy; 155 d->d_dump = mmcsd_dump; 156 d->d_name = "mmcsd"; 157 d->d_drv1 = sc; 158 d->d_maxsize = 4*1024*1024; /* Maximum defined SD card AU size. */ 159 d->d_sectorsize = mmc_get_sector_size(dev); 160 d->d_mediasize = (off_t)mmc_get_media_size(dev) * d->d_sectorsize; 161 d->d_stripeoffset = 0; 162 d->d_stripesize = mmc_get_erase_sector(dev) * d->d_sectorsize; 163 d->d_unit = device_get_unit(dev); 164 d->d_flags = DISKFLAG_CANDELETE; 165 d->d_delmaxsize = mmc_get_erase_sector(dev) * d->d_sectorsize * 1; /* conservative */ 166 /* 167 * Display in most natural units. There's no cards < 1MB. The SD 168 * standard goes to 2GiB due to its reliance on FAT, but the data 169 * format supports up to 4GiB and some card makers push it up to this 170 * limit. The SDHC standard only goes to 32GiB due to FAT32, but the 171 * data format supports up to 2TiB however. 2048GB isn't too ugly, so 172 * we note it in passing here and don't add the code to print 173 * TB). Since these cards are sold in terms of MB and GB not MiB and 174 * GiB, report them like that. We also round to the nearest unit, since 175 * many cards are a few percent short, even of the power of 10 size. 176 */ 177 mb = (d->d_mediasize + 1000000 / 2 - 1) / 1000000; 178 unit = 'M'; 179 if (mb >= 1000) { 180 unit = 'G'; 181 mb = (mb + 1000 / 2 - 1) / 1000; 182 } 183 /* 184 * Report the clock speed of the underlying hardware, which might be 185 * different than what the card reports due to hardware limitations. 186 * Report how many blocks the hardware transfers at once. 187 */ 188 speed = mmcbr_get_clock(device_get_parent(dev)); 189 maxblocks = mmc_get_max_data(dev); 190 device_printf(dev, "%ju%cB <%s>%s at %s %d.%01dMHz/%dbit/%d-block\n", 191 mb, unit, mmc_get_card_id_string(dev), 192 mmc_get_read_only(dev) ? " (read-only)" : "", 193 device_get_nameunit(device_get_parent(dev)), 194 speed / 1000000, (speed / 100000) % 10, 195 mmcsd_bus_bit_width(dev), maxblocks); 196 disk_create(d, DISK_VERSION); 197 bioq_init(&sc->bio_queue); 198 199 sc->running = 1; 200 sc->suspend = 0; 201 sc->eblock = sc->eend = 0; 202 kproc_create(&mmcsd_task, sc, &sc->p, 0, 0, "%s: mmc/sd card", 203 device_get_nameunit(dev)); 204 205 return (0); 206 } 207 208 static int 209 mmcsd_detach(device_t dev) 210 { 211 struct mmcsd_softc *sc = device_get_softc(dev); 212 213 MMCSD_LOCK(sc); 214 sc->suspend = 0; 215 if (sc->running > 0) { 216 /* kill thread */ 217 sc->running = 0; 218 wakeup(sc); 219 /* wait for thread to finish. */ 220 while (sc->running != -1) 221 msleep(sc, &sc->sc_mtx, 0, "detach", 0); 222 } 223 MMCSD_UNLOCK(sc); 224 225 /* Flush the request queue. */ 226 bioq_flush(&sc->bio_queue, NULL, ENXIO); 227 /* kill disk */ 228 disk_destroy(sc->disk); 229 230 MMCSD_LOCK_DESTROY(sc); 231 232 return (0); 233 } 234 235 static int 236 mmcsd_suspend(device_t dev) 237 { 238 struct mmcsd_softc *sc = device_get_softc(dev); 239 240 MMCSD_LOCK(sc); 241 sc->suspend = 1; 242 if (sc->running > 0) { 243 /* kill thread */ 244 sc->running = 0; 245 wakeup(sc); 246 /* wait for thread to finish. */ 247 while (sc->running != -1) 248 msleep(sc, &sc->sc_mtx, 0, "detach", 0); 249 } 250 MMCSD_UNLOCK(sc); 251 return (0); 252 } 253 254 static int 255 mmcsd_resume(device_t dev) 256 { 257 struct mmcsd_softc *sc = device_get_softc(dev); 258 259 MMCSD_LOCK(sc); 260 sc->suspend = 0; 261 if (sc->running <= 0) { 262 sc->running = 1; 263 MMCSD_UNLOCK(sc); 264 kproc_create(&mmcsd_task, sc, &sc->p, 0, 0, "%s: mmc/sd card", 265 device_get_nameunit(dev)); 266 } else 267 MMCSD_UNLOCK(sc); 268 return (0); 269 } 270 271 static int 272 mmcsd_open(struct disk *dp) 273 { 274 275 return (0); 276 } 277 278 static int 279 mmcsd_close(struct disk *dp) 280 { 281 282 return (0); 283 } 284 285 static void 286 mmcsd_strategy(struct bio *bp) 287 { 288 struct mmcsd_softc *sc; 289 290 sc = (struct mmcsd_softc *)bp->bio_disk->d_drv1; 291 MMCSD_LOCK(sc); 292 if (sc->running > 0 || sc->suspend > 0) { 293 bioq_disksort(&sc->bio_queue, bp); 294 MMCSD_UNLOCK(sc); 295 wakeup(sc); 296 } else { 297 MMCSD_UNLOCK(sc); 298 biofinish(bp, NULL, ENXIO); 299 } 300 } 301 302 static const char * 303 mmcsd_errmsg(int e) 304 { 305 if (e < 0 || e > MMC_ERR_MAX) 306 return "Bad error code"; 307 return errmsg[e]; 308 } 309 310 static daddr_t 311 mmcsd_rw(struct mmcsd_softc *sc, struct bio *bp) 312 { 313 daddr_t block, end; 314 struct mmc_command cmd; 315 struct mmc_command stop; 316 struct mmc_request req; 317 struct mmc_data data; 318 device_t dev = sc->dev; 319 int sz = sc->disk->d_sectorsize; 320 device_t mmcbr = device_get_parent(dev); 321 322 block = bp->bio_pblkno; 323 end = bp->bio_pblkno + (bp->bio_bcount / sz); 324 while (block < end) { 325 char *vaddr = bp->bio_data + 326 (block - bp->bio_pblkno) * sz; 327 int numblocks = min(end - block, mmc_get_max_data(dev)); 328 memset(&req, 0, sizeof(req)); 329 memset(&cmd, 0, sizeof(cmd)); 330 memset(&stop, 0, sizeof(stop)); 331 memset(&data, 0, sizeof(data)); 332 cmd.mrq = &req; 333 req.cmd = &cmd; 334 cmd.data = &data; 335 if (bp->bio_cmd == BIO_READ) { 336 if (numblocks > 1) 337 cmd.opcode = MMC_READ_MULTIPLE_BLOCK; 338 else 339 cmd.opcode = MMC_READ_SINGLE_BLOCK; 340 } else { 341 if (numblocks > 1) 342 cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK; 343 else 344 cmd.opcode = MMC_WRITE_BLOCK; 345 } 346 cmd.arg = block; 347 if (!mmc_get_high_cap(dev)) 348 cmd.arg <<= 9; 349 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 350 data.data = vaddr; 351 data.mrq = &req; 352 if (bp->bio_cmd == BIO_READ) 353 data.flags = MMC_DATA_READ; 354 else 355 data.flags = MMC_DATA_WRITE; 356 data.len = numblocks * sz; 357 if (numblocks > 1) { 358 data.flags |= MMC_DATA_MULTI; 359 stop.opcode = MMC_STOP_TRANSMISSION; 360 stop.arg = 0; 361 stop.flags = MMC_RSP_R1B | MMC_CMD_AC; 362 stop.mrq = &req; 363 req.stop = &stop; 364 } 365 MMCBUS_WAIT_FOR_REQUEST(mmcbr, dev, &req); 366 if (req.cmd->error != MMC_ERR_NONE) { 367 device_printf(dev, "Error indicated: %d %s\n", 368 req.cmd->error, mmcsd_errmsg(req.cmd->error)); 369 break; 370 } 371 block += numblocks; 372 } 373 return (block); 374 } 375 376 static daddr_t 377 mmcsd_delete(struct mmcsd_softc *sc, struct bio *bp) 378 { 379 daddr_t block, end, start, stop; 380 struct mmc_command cmd; 381 struct mmc_request req; 382 device_t dev = sc->dev; 383 int sz = sc->disk->d_sectorsize; 384 int erase_sector; 385 device_t mmcbr = device_get_parent(dev); 386 387 block = bp->bio_pblkno; 388 end = bp->bio_pblkno + (bp->bio_bcount / sz); 389 /* Coalesce with part remaining from previous request. */ 390 if (block > sc->eblock && block <= sc->eend) 391 block = sc->eblock; 392 if (end >= sc->eblock && end < sc->eend) 393 end = sc->eend; 394 /* Safe round to the erase sector boundaries. */ 395 erase_sector = mmc_get_erase_sector(dev); 396 start = block + erase_sector - 1; /* Round up. */ 397 start -= start % erase_sector; 398 stop = end; /* Round down. */ 399 stop -= end % erase_sector; 400 /* We can't erase area smaller then sector, store it for later. */ 401 if (start >= stop) { 402 sc->eblock = block; 403 sc->eend = end; 404 return (end); 405 } 406 407 /* Set erase start position. */ 408 memset(&req, 0, sizeof(req)); 409 memset(&cmd, 0, sizeof(cmd)); 410 cmd.mrq = &req; 411 req.cmd = &cmd; 412 if (mmc_get_card_type(dev) == mode_sd) 413 cmd.opcode = SD_ERASE_WR_BLK_START; 414 else 415 cmd.opcode = MMC_ERASE_GROUP_START; 416 cmd.arg = start; 417 if (!mmc_get_high_cap(dev)) 418 cmd.arg <<= 9; 419 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 420 MMCBUS_WAIT_FOR_REQUEST(mmcbr, dev, &req); 421 if (req.cmd->error != MMC_ERR_NONE) { 422 printf("erase err1: %d\n", req.cmd->error); 423 return (block); 424 } 425 /* Set erase stop position. */ 426 memset(&req, 0, sizeof(req)); 427 memset(&cmd, 0, sizeof(cmd)); 428 req.cmd = &cmd; 429 if (mmc_get_card_type(dev) == mode_sd) 430 cmd.opcode = SD_ERASE_WR_BLK_END; 431 else 432 cmd.opcode = MMC_ERASE_GROUP_END; 433 cmd.arg = stop; 434 if (!mmc_get_high_cap(dev)) 435 cmd.arg <<= 9; 436 cmd.arg--; 437 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 438 MMCBUS_WAIT_FOR_REQUEST(mmcbr, dev, &req); 439 if (req.cmd->error != MMC_ERR_NONE) { 440 printf("erase err2: %d\n", req.cmd->error); 441 return (block); 442 } 443 /* Erase range. */ 444 memset(&req, 0, sizeof(req)); 445 memset(&cmd, 0, sizeof(cmd)); 446 req.cmd = &cmd; 447 cmd.opcode = MMC_ERASE; 448 cmd.arg = 0; 449 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 450 MMCBUS_WAIT_FOR_REQUEST(mmcbr, dev, &req); 451 if (req.cmd->error != MMC_ERR_NONE) { 452 printf("erase err3 %d\n", req.cmd->error); 453 return (block); 454 } 455 /* Store one of remaining parts for the next call. */ 456 if (bp->bio_pblkno >= sc->eblock || block == start) { 457 sc->eblock = stop; /* Predict next forward. */ 458 sc->eend = end; 459 } else { 460 sc->eblock = block; /* Predict next backward. */ 461 sc->eend = start; 462 } 463 return (end); 464 } 465 466 static int 467 mmcsd_dump(void *arg, void *virtual, vm_offset_t physical, 468 off_t offset, size_t length) 469 { 470 struct disk *disk = arg; 471 struct mmcsd_softc *sc = (struct mmcsd_softc *)disk->d_drv1; 472 device_t dev = sc->dev; 473 struct bio bp; 474 daddr_t block, end; 475 device_t mmcbr = device_get_parent(dev); 476 477 /* length zero is special and really means flush buffers to media */ 478 if (!length) 479 return (0); 480 481 bzero(&bp, sizeof(struct bio)); 482 bp.bio_disk = disk; 483 bp.bio_pblkno = offset / disk->d_sectorsize; 484 bp.bio_bcount = length; 485 bp.bio_data = virtual; 486 bp.bio_cmd = BIO_WRITE; 487 end = bp.bio_pblkno + bp.bio_bcount / sc->disk->d_sectorsize; 488 MMCBUS_ACQUIRE_BUS(mmcbr, dev); 489 block = mmcsd_rw(sc, &bp); 490 MMCBUS_RELEASE_BUS(mmcbr, dev); 491 return ((end < block) ? EIO : 0); 492 } 493 494 static void 495 mmcsd_task(void *arg) 496 { 497 struct mmcsd_softc *sc = (struct mmcsd_softc*)arg; 498 struct bio *bp; 499 int sz; 500 daddr_t block, end; 501 device_t dev = sc->dev; 502 device_t mmcbr = device_get_parent(sc->dev); 503 504 while (1) { 505 MMCSD_LOCK(sc); 506 do { 507 if (sc->running == 0) 508 goto out; 509 bp = bioq_takefirst(&sc->bio_queue); 510 if (bp == NULL) 511 msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0); 512 } while (bp == NULL); 513 MMCSD_UNLOCK(sc); 514 if (bp->bio_cmd != BIO_READ && mmc_get_read_only(dev)) { 515 bp->bio_error = EROFS; 516 bp->bio_resid = bp->bio_bcount; 517 bp->bio_flags |= BIO_ERROR; 518 biodone(bp); 519 continue; 520 } 521 MMCBUS_ACQUIRE_BUS(mmcbr, dev); 522 sz = sc->disk->d_sectorsize; 523 block = bp->bio_pblkno; 524 end = bp->bio_pblkno + (bp->bio_bcount / sz); 525 if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) { 526 /* Access to the remaining erase block obsoletes it. */ 527 if (block < sc->eend && end > sc->eblock) 528 sc->eblock = sc->eend = 0; 529 block = mmcsd_rw(sc, bp); 530 } else if (bp->bio_cmd == BIO_DELETE) { 531 block = mmcsd_delete(sc, bp); 532 } 533 MMCBUS_RELEASE_BUS(mmcbr, dev); 534 if (block < end) { 535 bp->bio_error = EIO; 536 bp->bio_resid = (end - block) * sz; 537 bp->bio_flags |= BIO_ERROR; 538 } 539 biodone(bp); 540 } 541 out: 542 /* tell parent we're done */ 543 sc->running = -1; 544 MMCSD_UNLOCK(sc); 545 wakeup(sc); 546 547 kproc_exit(0); 548 } 549 550 static int 551 mmcsd_bus_bit_width(device_t dev) 552 { 553 554 if (mmc_get_bus_width(dev) == bus_width_1) 555 return (1); 556 if (mmc_get_bus_width(dev) == bus_width_4) 557 return (4); 558 return (8); 559 } 560 561 static device_method_t mmcsd_methods[] = { 562 DEVMETHOD(device_probe, mmcsd_probe), 563 DEVMETHOD(device_attach, mmcsd_attach), 564 DEVMETHOD(device_detach, mmcsd_detach), 565 DEVMETHOD(device_suspend, mmcsd_suspend), 566 DEVMETHOD(device_resume, mmcsd_resume), 567 DEVMETHOD_END 568 }; 569 570 static driver_t mmcsd_driver = { 571 "mmcsd", 572 mmcsd_methods, 573 sizeof(struct mmcsd_softc), 574 }; 575 static devclass_t mmcsd_devclass; 576 577 DRIVER_MODULE(mmcsd, mmc, mmcsd_driver, mmcsd_devclass, NULL, NULL); 578