2 * Copyright (c) 2006 Bernd Walter. All rights reserved.
3 * Copyright (c) 2006 M. Warner Losh. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
25 * Portions of this software may have been developed with reference to
26 * the SD Simplified Specification. The following disclaimer may apply:
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.
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.
53 #include <sys/cdefs.h>
54 __FBSDID("$FreeBSD$");
56 #include <sys/param.h>
57 #include <sys/systm.h>
61 #include <sys/kernel.h>
62 #include <sys/kthread.h>
64 #include <sys/malloc.h>
65 #include <sys/module.h>
66 #include <sys/mutex.h>
67 #include <geom/geom_disk.h>
69 #include <dev/mmc/mmcbrvar.h>
70 #include <dev/mmc/mmcreg.h>
71 #include <dev/mmc/mmcvar.h>
73 #include "mmcbus_if.h"
75 #if __FreeBSD_version < 800002
76 #define kproc_create kthread_create
77 #define kproc_exit kthread_exit
85 struct bio_queue_head bio_queue;
86 daddr_t eblock, eend; /* Range remaining after the last erase. */
91 /* bus entry points */
92 static int mmcsd_probe(device_t dev);
93 static int mmcsd_attach(device_t dev);
94 static int mmcsd_detach(device_t dev);
97 static int mmcsd_open(struct disk *dp);
98 static int mmcsd_close(struct disk *dp);
99 static void mmcsd_strategy(struct bio *bp);
100 static int mmcsd_dump(void *arg, void *virtual, vm_offset_t physical,
101 off_t offset, size_t length);
102 static void mmcsd_task(void *arg);
104 static int mmcsd_bus_bit_width(device_t dev);
106 #define MMCSD_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
107 #define MMCSD_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
108 #define MMCSD_LOCK_INIT(_sc) \
109 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \
111 #define MMCSD_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
112 #define MMCSD_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
113 #define MMCSD_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
116 mmcsd_probe(device_t dev)
120 device_set_desc(dev, "MMC/SD Memory Card");
125 mmcsd_attach(device_t dev)
127 struct mmcsd_softc *sc;
134 sc = device_get_softc(dev);
138 d = sc->disk = disk_alloc();
139 d->d_open = mmcsd_open;
140 d->d_close = mmcsd_close;
141 d->d_strategy = mmcsd_strategy;
142 d->d_dump = mmcsd_dump;
145 d->d_maxsize = 4*1024*1024; /* Maximum defined SD card AU size. */
146 d->d_sectorsize = mmc_get_sector_size(dev);
147 d->d_mediasize = (off_t)mmc_get_media_size(dev) * d->d_sectorsize;
148 d->d_stripeoffset = 0;
149 d->d_stripesize = mmc_get_erase_sector(dev) * d->d_sectorsize;
150 d->d_unit = device_get_unit(dev);
151 d->d_flags = DISKFLAG_CANDELETE;
153 * Display in most natural units. There's no cards < 1MB.
154 * The SD standard goes to 2GiB, but the data format supports
155 * up to 4GiB and some card makers push it up to this limit.
156 * The SDHC standard only goes to 32GiB (the data format in
157 * SDHC is good to 2TiB however, which isn't too ugly at
158 * 2048GiBm, so we note it in passing here and don't add the
159 * code to print TiB).
161 mb = d->d_mediasize >> 20; /* 1MiB == 1 << 20 */
163 if (mb >= 10240) { /* 1GiB = 1024 MiB */
168 * Report the clock speed of the underlying hardware, which might be
169 * different than what the card reports due to hardware limitations.
170 * Report how many blocks the hardware transfers at once, but clip the
171 * number to MAXPHYS since the system won't initiate larger transfers.
173 speed = mmcbr_get_clock(device_get_parent(dev));
174 maxblocks = mmc_get_max_data(dev);
175 if (maxblocks > MAXPHYS)
177 device_printf(dev, "%ju%cB <%s>%s at %s %d.%01dMHz/%dbit/%d-block\n",
178 mb, unit, mmc_get_card_id_string(dev),
179 mmc_get_read_only(dev) ? " (read-only)" : "",
180 device_get_nameunit(device_get_parent(dev)),
181 speed / 1000000, (speed / 100000) % 10,
182 mmcsd_bus_bit_width(dev), maxblocks);
183 disk_create(d, DISK_VERSION);
184 bioq_init(&sc->bio_queue);
188 sc->eblock = sc->eend = 0;
189 kproc_create(&mmcsd_task, sc, &sc->p, 0, 0, "task: mmc/sd card");
195 mmcsd_detach(device_t dev)
197 struct mmcsd_softc *sc = device_get_softc(dev);
201 if (sc->running > 0) {
205 /* wait for thread to finish. */
206 while (sc->running != -1)
207 msleep(sc, &sc->sc_mtx, 0, "detach", 0);
211 /* Flush the request queue. */
212 bioq_flush(&sc->bio_queue, NULL, ENXIO);
214 disk_destroy(sc->disk);
216 MMCSD_LOCK_DESTROY(sc);
222 mmcsd_suspend(device_t dev)
224 struct mmcsd_softc *sc = device_get_softc(dev);
228 if (sc->running > 0) {
232 /* wait for thread to finish. */
233 while (sc->running != -1)
234 msleep(sc, &sc->sc_mtx, 0, "detach", 0);
241 mmcsd_resume(device_t dev)
243 struct mmcsd_softc *sc = device_get_softc(dev);
247 if (sc->running <= 0) {
250 kproc_create(&mmcsd_task, sc, &sc->p, 0, 0, "task: mmc/sd card");
257 mmcsd_open(struct disk *dp)
263 mmcsd_close(struct disk *dp)
269 mmcsd_strategy(struct bio *bp)
271 struct mmcsd_softc *sc;
273 sc = (struct mmcsd_softc *)bp->bio_disk->d_drv1;
275 if (sc->running > 0 || sc->suspend > 0) {
276 bioq_disksort(&sc->bio_queue, bp);
281 biofinish(bp, NULL, ENXIO);
286 mmcsd_rw(struct mmcsd_softc *sc, struct bio *bp)
289 struct mmc_command cmd;
290 struct mmc_command stop;
291 struct mmc_request req;
292 struct mmc_data data;
293 device_t dev = sc->dev;
294 int sz = sc->disk->d_sectorsize;
296 block = bp->bio_pblkno;
297 end = bp->bio_pblkno + (bp->bio_bcount / sz);
298 while (block < end) {
299 char *vaddr = bp->bio_data +
300 (block - bp->bio_pblkno) * sz;
301 int numblocks = min(end - block, mmc_get_max_data(dev));
302 memset(&req, 0, sizeof(req));
303 memset(&cmd, 0, sizeof(cmd));
304 memset(&stop, 0, sizeof(stop));
307 if (bp->bio_cmd == BIO_READ) {
309 cmd.opcode = MMC_READ_MULTIPLE_BLOCK;
311 cmd.opcode = MMC_READ_SINGLE_BLOCK;
314 cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
316 cmd.opcode = MMC_WRITE_BLOCK;
319 if (!mmc_get_high_cap(dev))
321 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
324 if (bp->bio_cmd == BIO_READ)
325 data.flags = MMC_DATA_READ;
327 data.flags = MMC_DATA_WRITE;
328 data.len = numblocks * sz;
330 data.flags |= MMC_DATA_MULTI;
331 stop.opcode = MMC_STOP_TRANSMISSION;
333 stop.flags = MMC_RSP_R1B | MMC_CMD_AC;
336 // printf("Len %d %lld-%lld flags %#x sz %d\n",
337 // (int)data.len, (long long)block, (long long)end, data.flags, sz);
338 MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev,
340 if (req.cmd->error != MMC_ERR_NONE)
348 mmcsd_delete(struct mmcsd_softc *sc, struct bio *bp)
350 daddr_t block, end, start, stop;
351 struct mmc_command cmd;
352 struct mmc_request req;
353 device_t dev = sc->dev;
354 int sz = sc->disk->d_sectorsize;
357 block = bp->bio_pblkno;
358 end = bp->bio_pblkno + (bp->bio_bcount / sz);
359 /* Coalesce with part remaining from previous request. */
360 if (block > sc->eblock && block <= sc->eend)
362 if (end >= sc->eblock && end < sc->eend)
364 /* Safe round to the erase sector boundaries. */
365 erase_sector = mmc_get_erase_sector(dev);
366 start = block + erase_sector - 1; /* Round up. */
367 start -= start % erase_sector;
368 stop = end; /* Round down. */
369 stop -= end % erase_sector;
370 /* We can't erase area smaller then sector, store it for later. */
377 /* Set erase start position. */
378 memset(&req, 0, sizeof(req));
379 memset(&cmd, 0, sizeof(cmd));
381 if (mmc_get_card_type(dev) == mode_sd)
382 cmd.opcode = SD_ERASE_WR_BLK_START;
384 cmd.opcode = MMC_ERASE_GROUP_START;
386 if (!mmc_get_high_cap(dev))
388 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
389 MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev,
391 if (req.cmd->error != MMC_ERR_NONE) {
392 printf("erase err1: %d\n", req.cmd->error);
395 /* Set erase stop position. */
396 memset(&req, 0, sizeof(req));
397 memset(&cmd, 0, sizeof(cmd));
399 if (mmc_get_card_type(dev) == mode_sd)
400 cmd.opcode = SD_ERASE_WR_BLK_END;
402 cmd.opcode = MMC_ERASE_GROUP_END;
404 if (!mmc_get_high_cap(dev))
407 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
408 MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev,
410 if (req.cmd->error != MMC_ERR_NONE) {
411 printf("erase err2: %d\n", req.cmd->error);
415 memset(&req, 0, sizeof(req));
416 memset(&cmd, 0, sizeof(cmd));
418 cmd.opcode = MMC_ERASE;
420 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
421 MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev,
423 if (req.cmd->error != MMC_ERR_NONE) {
424 printf("erase err3 %d\n", req.cmd->error);
427 /* Store one of remaining parts for the next call. */
428 if (bp->bio_pblkno >= sc->eblock || block == start) {
429 sc->eblock = stop; /* Predict next forward. */
432 sc->eblock = block; /* Predict next backward. */
439 mmcsd_dump(void *arg, void *virtual, vm_offset_t physical,
440 off_t offset, size_t length)
442 struct disk *disk = arg;
443 struct mmcsd_softc *sc = (struct mmcsd_softc *)disk->d_drv1;
444 device_t dev = sc->dev;
448 /* length zero is special and really means flush buffers to media */
452 bzero(&bp, sizeof(struct bio));
454 bp.bio_pblkno = offset / disk->d_sectorsize;
455 bp.bio_bcount = length;
456 bp.bio_data = virtual;
457 bp.bio_cmd = BIO_WRITE;
458 end = bp.bio_pblkno + bp.bio_bcount / sc->disk->d_sectorsize;
459 MMCBUS_ACQUIRE_BUS(device_get_parent(dev), dev);
460 block = mmcsd_rw(sc, &bp);
461 MMCBUS_RELEASE_BUS(device_get_parent(dev), dev);
462 return ((end < block) ? EIO : 0);
466 mmcsd_task(void *arg)
468 struct mmcsd_softc *sc = (struct mmcsd_softc*)arg;
478 if (sc->running == 0)
480 bp = bioq_takefirst(&sc->bio_queue);
482 msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0);
483 } while (bp == NULL);
485 if (bp->bio_cmd != BIO_READ && mmc_get_read_only(dev)) {
486 bp->bio_error = EROFS;
487 bp->bio_resid = bp->bio_bcount;
488 bp->bio_flags |= BIO_ERROR;
492 MMCBUS_ACQUIRE_BUS(device_get_parent(dev), dev);
493 sz = sc->disk->d_sectorsize;
494 block = bp->bio_pblkno;
495 end = bp->bio_pblkno + (bp->bio_bcount / sz);
496 if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
497 /* Access to the remaining erase block obsoletes it. */
498 if (block < sc->eend && end > sc->eblock)
499 sc->eblock = sc->eend = 0;
500 block = mmcsd_rw(sc, bp);
501 } else if (bp->bio_cmd == BIO_DELETE) {
502 block = mmcsd_delete(sc, bp);
504 MMCBUS_RELEASE_BUS(device_get_parent(dev), dev);
507 bp->bio_resid = (end - block) * sz;
508 bp->bio_flags |= BIO_ERROR;
513 /* tell parent we're done */
522 mmcsd_bus_bit_width(device_t dev)
524 if (mmc_get_bus_width(dev) == bus_width_1)
526 if (mmc_get_bus_width(dev) == bus_width_4)
531 static device_method_t mmcsd_methods[] = {
532 DEVMETHOD(device_probe, mmcsd_probe),
533 DEVMETHOD(device_attach, mmcsd_attach),
534 DEVMETHOD(device_detach, mmcsd_detach),
535 DEVMETHOD(device_suspend, mmcsd_suspend),
536 DEVMETHOD(device_resume, mmcsd_resume),
540 static driver_t mmcsd_driver = {
543 sizeof(struct mmcsd_softc),
545 static devclass_t mmcsd_devclass;
547 DRIVER_MODULE(mmcsd, mmc, mmcsd_driver, mmcsd_devclass, NULL, NULL);