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 /* 166 * Display in most natural units. There's no cards < 1MB. 167 * The SD standard goes to 2GiB, but the data format supports 168 * up to 4GiB and some card makers push it up to this limit. 169 * The SDHC standard only goes to 32GiB (the data format in 170 * SDHC is good to 2TiB however, which isn't too ugly at 171 * 2048GiBm, so we note it in passing here and don't add the 172 * code to print TiB). 173 */ 174 mb = d->d_mediasize >> 20; /* 1MiB == 1 << 20 */ 175 unit = 'M'; 176 if (mb >= 10240) { /* 1GiB = 1024 MiB */ 177 unit = 'G'; 178 mb /= 1024; 179 } 180 /* 181 * Report the clock speed of the underlying hardware, which might be 182 * different than what the card reports due to hardware limitations. 183 * Report how many blocks the hardware transfers at once. 184 */ 185 speed = mmcbr_get_clock(device_get_parent(dev)); 186 maxblocks = mmc_get_max_data(dev); 187 device_printf(dev, "%ju%cB <%s>%s at %s %d.%01dMHz/%dbit/%d-block\n", 188 mb, unit, mmc_get_card_id_string(dev), 189 mmc_get_read_only(dev) ? " (read-only)" : "", 190 device_get_nameunit(device_get_parent(dev)), 191 speed / 1000000, (speed / 100000) % 10, 192 mmcsd_bus_bit_width(dev), maxblocks); 193 disk_create(d, DISK_VERSION); 194 bioq_init(&sc->bio_queue); 195 196 sc->running = 1; 197 sc->suspend = 0; 198 sc->eblock = sc->eend = 0; 199 kproc_create(&mmcsd_task, sc, &sc->p, 0, 0, "task: mmc/sd card"); 200 201 return (0); 202 } 203 204 static int 205 mmcsd_detach(device_t dev) 206 { 207 struct mmcsd_softc *sc = device_get_softc(dev); 208 209 MMCSD_LOCK(sc); 210 sc->suspend = 0; 211 if (sc->running > 0) { 212 /* kill thread */ 213 sc->running = 0; 214 wakeup(sc); 215 /* wait for thread to finish. */ 216 while (sc->running != -1) 217 msleep(sc, &sc->sc_mtx, 0, "detach", 0); 218 } 219 MMCSD_UNLOCK(sc); 220 221 /* Flush the request queue. */ 222 bioq_flush(&sc->bio_queue, NULL, ENXIO); 223 /* kill disk */ 224 disk_destroy(sc->disk); 225 226 MMCSD_LOCK_DESTROY(sc); 227 228 return (0); 229 } 230 231 static int 232 mmcsd_suspend(device_t dev) 233 { 234 struct mmcsd_softc *sc = device_get_softc(dev); 235 236 MMCSD_LOCK(sc); 237 sc->suspend = 1; 238 if (sc->running > 0) { 239 /* kill thread */ 240 sc->running = 0; 241 wakeup(sc); 242 /* wait for thread to finish. */ 243 while (sc->running != -1) 244 msleep(sc, &sc->sc_mtx, 0, "detach", 0); 245 } 246 MMCSD_UNLOCK(sc); 247 return (0); 248 } 249 250 static int 251 mmcsd_resume(device_t dev) 252 { 253 struct mmcsd_softc *sc = device_get_softc(dev); 254 255 MMCSD_LOCK(sc); 256 sc->suspend = 0; 257 if (sc->running <= 0) { 258 sc->running = 1; 259 MMCSD_UNLOCK(sc); 260 kproc_create(&mmcsd_task, sc, &sc->p, 0, 0, "task: mmc/sd card"); 261 } else 262 MMCSD_UNLOCK(sc); 263 return (0); 264 } 265 266 static int 267 mmcsd_open(struct disk *dp) 268 { 269 270 return (0); 271 } 272 273 static int 274 mmcsd_close(struct disk *dp) 275 { 276 277 return (0); 278 } 279 280 static void 281 mmcsd_strategy(struct bio *bp) 282 { 283 struct mmcsd_softc *sc; 284 285 sc = (struct mmcsd_softc *)bp->bio_disk->d_drv1; 286 MMCSD_LOCK(sc); 287 if (sc->running > 0 || sc->suspend > 0) { 288 bioq_disksort(&sc->bio_queue, bp); 289 MMCSD_UNLOCK(sc); 290 wakeup(sc); 291 } else { 292 MMCSD_UNLOCK(sc); 293 biofinish(bp, NULL, ENXIO); 294 } 295 } 296 297 static const char * 298 mmcsd_errmsg(int e) 299 { 300 if (e < 0 || e > MMC_ERR_MAX) 301 return "Bad error code"; 302 return errmsg[e]; 303 } 304 305 static daddr_t 306 mmcsd_rw(struct mmcsd_softc *sc, struct bio *bp) 307 { 308 daddr_t block, end; 309 struct mmc_command cmd; 310 struct mmc_command stop; 311 struct mmc_request req; 312 struct mmc_data data; 313 device_t dev = sc->dev; 314 int sz = sc->disk->d_sectorsize; 315 316 block = bp->bio_pblkno; 317 end = bp->bio_pblkno + (bp->bio_bcount / sz); 318 while (block < end) { 319 char *vaddr = bp->bio_data + 320 (block - bp->bio_pblkno) * sz; 321 int numblocks = min(end - block, mmc_get_max_data(dev)); 322 memset(&req, 0, sizeof(req)); 323 memset(&cmd, 0, sizeof(cmd)); 324 memset(&stop, 0, sizeof(stop)); 325 req.cmd = &cmd; 326 cmd.data = &data; 327 if (bp->bio_cmd == BIO_READ) { 328 if (numblocks > 1) 329 cmd.opcode = MMC_READ_MULTIPLE_BLOCK; 330 else 331 cmd.opcode = MMC_READ_SINGLE_BLOCK; 332 } else { 333 if (numblocks > 1) 334 cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK; 335 else 336 cmd.opcode = MMC_WRITE_BLOCK; 337 } 338 cmd.arg = block; 339 if (!mmc_get_high_cap(dev)) 340 cmd.arg <<= 9; 341 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 342 data.data = vaddr; 343 data.mrq = &req; 344 if (bp->bio_cmd == BIO_READ) 345 data.flags = MMC_DATA_READ; 346 else 347 data.flags = MMC_DATA_WRITE; 348 data.len = numblocks * sz; 349 if (numblocks > 1) { 350 data.flags |= MMC_DATA_MULTI; 351 stop.opcode = MMC_STOP_TRANSMISSION; 352 stop.arg = 0; 353 stop.flags = MMC_RSP_R1B | MMC_CMD_AC; 354 req.stop = &stop; 355 } 356 MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev, 357 &req); 358 if (req.cmd->error != MMC_ERR_NONE) { 359 device_printf(dev, "Error indicated: %d %s\n", 360 req.cmd->error, mmcsd_errmsg(req.cmd->error)); 361 break; 362 } 363 block += numblocks; 364 } 365 return (block); 366 } 367 368 static daddr_t 369 mmcsd_delete(struct mmcsd_softc *sc, struct bio *bp) 370 { 371 daddr_t block, end, start, stop; 372 struct mmc_command cmd; 373 struct mmc_request req; 374 device_t dev = sc->dev; 375 int sz = sc->disk->d_sectorsize; 376 int erase_sector; 377 378 block = bp->bio_pblkno; 379 end = bp->bio_pblkno + (bp->bio_bcount / sz); 380 /* Coalesce with part remaining from previous request. */ 381 if (block > sc->eblock && block <= sc->eend) 382 block = sc->eblock; 383 if (end >= sc->eblock && end < sc->eend) 384 end = sc->eend; 385 /* Safe round to the erase sector boundaries. */ 386 erase_sector = mmc_get_erase_sector(dev); 387 start = block + erase_sector - 1; /* Round up. */ 388 start -= start % erase_sector; 389 stop = end; /* Round down. */ 390 stop -= end % erase_sector; 391 /* We can't erase area smaller then sector, store it for later. */ 392 if (start >= stop) { 393 sc->eblock = block; 394 sc->eend = end; 395 return (end); 396 } 397 398 /* Set erase start position. */ 399 memset(&req, 0, sizeof(req)); 400 memset(&cmd, 0, sizeof(cmd)); 401 req.cmd = &cmd; 402 if (mmc_get_card_type(dev) == mode_sd) 403 cmd.opcode = SD_ERASE_WR_BLK_START; 404 else 405 cmd.opcode = MMC_ERASE_GROUP_START; 406 cmd.arg = start; 407 if (!mmc_get_high_cap(dev)) 408 cmd.arg <<= 9; 409 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 410 MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev, 411 &req); 412 if (req.cmd->error != MMC_ERR_NONE) { 413 printf("erase err1: %d\n", req.cmd->error); 414 return (block); 415 } 416 /* Set erase stop position. */ 417 memset(&req, 0, sizeof(req)); 418 memset(&cmd, 0, sizeof(cmd)); 419 req.cmd = &cmd; 420 if (mmc_get_card_type(dev) == mode_sd) 421 cmd.opcode = SD_ERASE_WR_BLK_END; 422 else 423 cmd.opcode = MMC_ERASE_GROUP_END; 424 cmd.arg = stop; 425 if (!mmc_get_high_cap(dev)) 426 cmd.arg <<= 9; 427 cmd.arg--; 428 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 429 MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev, 430 &req); 431 if (req.cmd->error != MMC_ERR_NONE) { 432 printf("erase err2: %d\n", req.cmd->error); 433 return (block); 434 } 435 /* Erase range. */ 436 memset(&req, 0, sizeof(req)); 437 memset(&cmd, 0, sizeof(cmd)); 438 req.cmd = &cmd; 439 cmd.opcode = MMC_ERASE; 440 cmd.arg = 0; 441 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 442 MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev, 443 &req); 444 if (req.cmd->error != MMC_ERR_NONE) { 445 printf("erase err3 %d\n", req.cmd->error); 446 return (block); 447 } 448 /* Store one of remaining parts for the next call. */ 449 if (bp->bio_pblkno >= sc->eblock || block == start) { 450 sc->eblock = stop; /* Predict next forward. */ 451 sc->eend = end; 452 } else { 453 sc->eblock = block; /* Predict next backward. */ 454 sc->eend = start; 455 } 456 return (end); 457 } 458 459 static int 460 mmcsd_dump(void *arg, void *virtual, vm_offset_t physical, 461 off_t offset, size_t length) 462 { 463 struct disk *disk = arg; 464 struct mmcsd_softc *sc = (struct mmcsd_softc *)disk->d_drv1; 465 device_t dev = sc->dev; 466 struct bio bp; 467 daddr_t block, end; 468 469 /* length zero is special and really means flush buffers to media */ 470 if (!length) 471 return (0); 472 473 bzero(&bp, sizeof(struct bio)); 474 bp.bio_disk = disk; 475 bp.bio_pblkno = offset / disk->d_sectorsize; 476 bp.bio_bcount = length; 477 bp.bio_data = virtual; 478 bp.bio_cmd = BIO_WRITE; 479 end = bp.bio_pblkno + bp.bio_bcount / sc->disk->d_sectorsize; 480 MMCBUS_ACQUIRE_BUS(device_get_parent(dev), dev); 481 block = mmcsd_rw(sc, &bp); 482 MMCBUS_RELEASE_BUS(device_get_parent(dev), dev); 483 return ((end < block) ? EIO : 0); 484 } 485 486 static void 487 mmcsd_task(void *arg) 488 { 489 struct mmcsd_softc *sc = (struct mmcsd_softc*)arg; 490 struct bio *bp; 491 int sz; 492 daddr_t block, end; 493 device_t dev; 494 495 dev = sc->dev; 496 while (1) { 497 MMCSD_LOCK(sc); 498 do { 499 if (sc->running == 0) 500 goto out; 501 bp = bioq_takefirst(&sc->bio_queue); 502 if (bp == NULL) 503 msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0); 504 } while (bp == NULL); 505 MMCSD_UNLOCK(sc); 506 if (bp->bio_cmd != BIO_READ && mmc_get_read_only(dev)) { 507 bp->bio_error = EROFS; 508 bp->bio_resid = bp->bio_bcount; 509 bp->bio_flags |= BIO_ERROR; 510 biodone(bp); 511 continue; 512 } 513 MMCBUS_ACQUIRE_BUS(device_get_parent(dev), dev); 514 sz = sc->disk->d_sectorsize; 515 block = bp->bio_pblkno; 516 end = bp->bio_pblkno + (bp->bio_bcount / sz); 517 if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) { 518 /* Access to the remaining erase block obsoletes it. */ 519 if (block < sc->eend && end > sc->eblock) 520 sc->eblock = sc->eend = 0; 521 block = mmcsd_rw(sc, bp); 522 } else if (bp->bio_cmd == BIO_DELETE) { 523 block = mmcsd_delete(sc, bp); 524 } 525 MMCBUS_RELEASE_BUS(device_get_parent(dev), dev); 526 if (block < end) { 527 bp->bio_error = EIO; 528 bp->bio_resid = (end - block) * sz; 529 bp->bio_flags |= BIO_ERROR; 530 } 531 biodone(bp); 532 } 533 out: 534 /* tell parent we're done */ 535 sc->running = -1; 536 MMCSD_UNLOCK(sc); 537 wakeup(sc); 538 539 kproc_exit(0); 540 } 541 542 static int 543 mmcsd_bus_bit_width(device_t dev) 544 { 545 546 if (mmc_get_bus_width(dev) == bus_width_1) 547 return (1); 548 if (mmc_get_bus_width(dev) == bus_width_4) 549 return (4); 550 return (8); 551 } 552 553 static device_method_t mmcsd_methods[] = { 554 DEVMETHOD(device_probe, mmcsd_probe), 555 DEVMETHOD(device_attach, mmcsd_attach), 556 DEVMETHOD(device_detach, mmcsd_detach), 557 DEVMETHOD(device_suspend, mmcsd_suspend), 558 DEVMETHOD(device_resume, mmcsd_resume), 559 DEVMETHOD_END 560 }; 561 562 static driver_t mmcsd_driver = { 563 "mmcsd", 564 mmcsd_methods, 565 sizeof(struct mmcsd_softc), 566 }; 567 static devclass_t mmcsd_devclass; 568 569 DRIVER_MODULE(mmcsd, mmc, mmcsd_driver, mmcsd_devclass, NULL, NULL); 570