| Current Path : /sys/dev/mmc/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/dev/mmc/mmcsd.c |
/*-
* Copyright (c) 2006 Bernd Walter. All rights reserved.
* Copyright (c) 2006 M. Warner Losh. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Portions of this software may have been developed with reference to
* the SD Simplified Specification. The following disclaimer may apply:
*
* The following conditions apply to the release of the simplified
* specification ("Simplified Specification") by the SD Card Association and
* the SD Group. The Simplified Specification is a subset of the complete SD
* Specification which is owned by the SD Card Association and the SD
* Group. This Simplified Specification is provided on a non-confidential
* basis subject to the disclaimers below. Any implementation of the
* Simplified Specification may require a license from the SD Card
* Association, SD Group, SD-3C LLC or other third parties.
*
* Disclaimers:
*
* The information contained in the Simplified Specification is presented only
* as a standard specification for SD Cards and SD Host/Ancillary products and
* is provided "AS-IS" without any representations or warranties of any
* kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD
* Card Association for any damages, any infringements of patents or other
* right of the SD Group, SD-3C LLC, the SD Card Association or any third
* parties, which may result from its use. No license is granted by
* implication, estoppel or otherwise under any patent or other rights of the
* SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing
* herein shall be construed as an obligation by the SD Group, the SD-3C LLC
* or the SD Card Association to disclose or distribute any technical
* information, know-how or other confidential information to any third party.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/mmc/mmcsd.c 236642 2012-06-05 20:53:46Z marius $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <geom/geom_disk.h>
#include <dev/mmc/mmcbrvar.h>
#include <dev/mmc/mmcreg.h>
#include <dev/mmc/mmcvar.h>
#include "mmcbus_if.h"
#if __FreeBSD_version < 800002
#define kproc_create kthread_create
#define kproc_exit kthread_exit
#endif
struct mmcsd_softc {
device_t dev;
struct mtx sc_mtx;
struct disk *disk;
struct proc *p;
struct bio_queue_head bio_queue;
daddr_t eblock, eend; /* Range remaining after the last erase. */
int running;
int suspend;
};
/* bus entry points */
static int mmcsd_attach(device_t dev);
static int mmcsd_detach(device_t dev);
static int mmcsd_probe(device_t dev);
/* disk routines */
static int mmcsd_close(struct disk *dp);
static int mmcsd_dump(void *arg, void *virtual, vm_offset_t physical,
off_t offset, size_t length);
static int mmcsd_open(struct disk *dp);
static void mmcsd_strategy(struct bio *bp);
static void mmcsd_task(void *arg);
static int mmcsd_bus_bit_width(device_t dev);
static daddr_t mmcsd_delete(struct mmcsd_softc *sc, struct bio *bp);
static daddr_t mmcsd_rw(struct mmcsd_softc *sc, struct bio *bp);
#define MMCSD_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define MMCSD_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
#define MMCSD_LOCK_INIT(_sc) \
mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \
"mmcsd", MTX_DEF)
#define MMCSD_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
#define MMCSD_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
#define MMCSD_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
static int
mmcsd_probe(device_t dev)
{
device_quiet(dev);
device_set_desc(dev, "MMC/SD Memory Card");
return (0);
}
static int
mmcsd_attach(device_t dev)
{
struct mmcsd_softc *sc;
struct disk *d;
intmax_t mb;
uint32_t speed;
uint32_t maxblocks;
char unit;
sc = device_get_softc(dev);
sc->dev = dev;
MMCSD_LOCK_INIT(sc);
d = sc->disk = disk_alloc();
d->d_open = mmcsd_open;
d->d_close = mmcsd_close;
d->d_strategy = mmcsd_strategy;
d->d_dump = mmcsd_dump;
d->d_name = "mmcsd";
d->d_drv1 = sc;
d->d_maxsize = 4*1024*1024; /* Maximum defined SD card AU size. */
d->d_sectorsize = mmc_get_sector_size(dev);
d->d_mediasize = (off_t)mmc_get_media_size(dev) * d->d_sectorsize;
d->d_stripeoffset = 0;
d->d_stripesize = mmc_get_erase_sector(dev) * d->d_sectorsize;
d->d_unit = device_get_unit(dev);
d->d_flags = DISKFLAG_CANDELETE;
/*
* Display in most natural units. There's no cards < 1MB.
* The SD standard goes to 2GiB, but the data format supports
* up to 4GiB and some card makers push it up to this limit.
* The SDHC standard only goes to 32GiB (the data format in
* SDHC is good to 2TiB however, which isn't too ugly at
* 2048GiBm, so we note it in passing here and don't add the
* code to print TiB).
*/
mb = d->d_mediasize >> 20; /* 1MiB == 1 << 20 */
unit = 'M';
if (mb >= 10240) { /* 1GiB = 1024 MiB */
unit = 'G';
mb /= 1024;
}
/*
* Report the clock speed of the underlying hardware, which might be
* different than what the card reports due to hardware limitations.
* Report how many blocks the hardware transfers at once, but clip the
* number to MAXPHYS since the system won't initiate larger transfers.
*/
speed = mmcbr_get_clock(device_get_parent(dev));
maxblocks = mmc_get_max_data(dev);
if (maxblocks > MAXPHYS)
maxblocks = MAXPHYS;
device_printf(dev, "%ju%cB <%s>%s at %s %d.%01dMHz/%dbit/%d-block\n",
mb, unit, mmc_get_card_id_string(dev),
mmc_get_read_only(dev) ? " (read-only)" : "",
device_get_nameunit(device_get_parent(dev)),
speed / 1000000, (speed / 100000) % 10,
mmcsd_bus_bit_width(dev), maxblocks);
disk_create(d, DISK_VERSION);
bioq_init(&sc->bio_queue);
sc->running = 1;
sc->suspend = 0;
sc->eblock = sc->eend = 0;
kproc_create(&mmcsd_task, sc, &sc->p, 0, 0, "task: mmc/sd card");
return (0);
}
static int
mmcsd_detach(device_t dev)
{
struct mmcsd_softc *sc = device_get_softc(dev);
MMCSD_LOCK(sc);
sc->suspend = 0;
if (sc->running > 0) {
/* kill thread */
sc->running = 0;
wakeup(sc);
/* wait for thread to finish. */
while (sc->running != -1)
msleep(sc, &sc->sc_mtx, 0, "detach", 0);
}
MMCSD_UNLOCK(sc);
/* Flush the request queue. */
bioq_flush(&sc->bio_queue, NULL, ENXIO);
/* kill disk */
disk_destroy(sc->disk);
MMCSD_LOCK_DESTROY(sc);
return (0);
}
static int
mmcsd_suspend(device_t dev)
{
struct mmcsd_softc *sc = device_get_softc(dev);
MMCSD_LOCK(sc);
sc->suspend = 1;
if (sc->running > 0) {
/* kill thread */
sc->running = 0;
wakeup(sc);
/* wait for thread to finish. */
while (sc->running != -1)
msleep(sc, &sc->sc_mtx, 0, "detach", 0);
}
MMCSD_UNLOCK(sc);
return (0);
}
static int
mmcsd_resume(device_t dev)
{
struct mmcsd_softc *sc = device_get_softc(dev);
MMCSD_LOCK(sc);
sc->suspend = 0;
if (sc->running <= 0) {
sc->running = 1;
MMCSD_UNLOCK(sc);
kproc_create(&mmcsd_task, sc, &sc->p, 0, 0, "task: mmc/sd card");
} else
MMCSD_UNLOCK(sc);
return (0);
}
static int
mmcsd_open(struct disk *dp)
{
return (0);
}
static int
mmcsd_close(struct disk *dp)
{
return (0);
}
static void
mmcsd_strategy(struct bio *bp)
{
struct mmcsd_softc *sc;
sc = (struct mmcsd_softc *)bp->bio_disk->d_drv1;
MMCSD_LOCK(sc);
if (sc->running > 0 || sc->suspend > 0) {
bioq_disksort(&sc->bio_queue, bp);
MMCSD_UNLOCK(sc);
wakeup(sc);
} else {
MMCSD_UNLOCK(sc);
biofinish(bp, NULL, ENXIO);
}
}
static daddr_t
mmcsd_rw(struct mmcsd_softc *sc, struct bio *bp)
{
daddr_t block, end;
struct mmc_command cmd;
struct mmc_command stop;
struct mmc_request req;
struct mmc_data data;
device_t dev = sc->dev;
int sz = sc->disk->d_sectorsize;
block = bp->bio_pblkno;
end = bp->bio_pblkno + (bp->bio_bcount / sz);
while (block < end) {
char *vaddr = bp->bio_data +
(block - bp->bio_pblkno) * sz;
int numblocks = min(end - block, mmc_get_max_data(dev));
memset(&req, 0, sizeof(req));
memset(&cmd, 0, sizeof(cmd));
memset(&stop, 0, sizeof(stop));
req.cmd = &cmd;
cmd.data = &data;
if (bp->bio_cmd == BIO_READ) {
if (numblocks > 1)
cmd.opcode = MMC_READ_MULTIPLE_BLOCK;
else
cmd.opcode = MMC_READ_SINGLE_BLOCK;
} else {
if (numblocks > 1)
cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
else
cmd.opcode = MMC_WRITE_BLOCK;
}
cmd.arg = block;
if (!mmc_get_high_cap(dev))
cmd.arg <<= 9;
cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
data.data = vaddr;
data.mrq = &req;
if (bp->bio_cmd == BIO_READ)
data.flags = MMC_DATA_READ;
else
data.flags = MMC_DATA_WRITE;
data.len = numblocks * sz;
if (numblocks > 1) {
data.flags |= MMC_DATA_MULTI;
stop.opcode = MMC_STOP_TRANSMISSION;
stop.arg = 0;
stop.flags = MMC_RSP_R1B | MMC_CMD_AC;
req.stop = &stop;
}
// printf("Len %d %lld-%lld flags %#x sz %d\n",
// (int)data.len, (long long)block, (long long)end, data.flags, sz);
MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev,
&req);
if (req.cmd->error != MMC_ERR_NONE)
break;
block += numblocks;
}
return (block);
}
static daddr_t
mmcsd_delete(struct mmcsd_softc *sc, struct bio *bp)
{
daddr_t block, end, start, stop;
struct mmc_command cmd;
struct mmc_request req;
device_t dev = sc->dev;
int sz = sc->disk->d_sectorsize;
int erase_sector;
block = bp->bio_pblkno;
end = bp->bio_pblkno + (bp->bio_bcount / sz);
/* Coalesce with part remaining from previous request. */
if (block > sc->eblock && block <= sc->eend)
block = sc->eblock;
if (end >= sc->eblock && end < sc->eend)
end = sc->eend;
/* Safe round to the erase sector boundaries. */
erase_sector = mmc_get_erase_sector(dev);
start = block + erase_sector - 1; /* Round up. */
start -= start % erase_sector;
stop = end; /* Round down. */
stop -= end % erase_sector;
/* We can't erase area smaller then sector, store it for later. */
if (start >= stop) {
sc->eblock = block;
sc->eend = end;
return (end);
}
/* Set erase start position. */
memset(&req, 0, sizeof(req));
memset(&cmd, 0, sizeof(cmd));
req.cmd = &cmd;
if (mmc_get_card_type(dev) == mode_sd)
cmd.opcode = SD_ERASE_WR_BLK_START;
else
cmd.opcode = MMC_ERASE_GROUP_START;
cmd.arg = start;
if (!mmc_get_high_cap(dev))
cmd.arg <<= 9;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev,
&req);
if (req.cmd->error != MMC_ERR_NONE) {
printf("erase err1: %d\n", req.cmd->error);
return (block);
}
/* Set erase stop position. */
memset(&req, 0, sizeof(req));
memset(&cmd, 0, sizeof(cmd));
req.cmd = &cmd;
if (mmc_get_card_type(dev) == mode_sd)
cmd.opcode = SD_ERASE_WR_BLK_END;
else
cmd.opcode = MMC_ERASE_GROUP_END;
cmd.arg = stop;
if (!mmc_get_high_cap(dev))
cmd.arg <<= 9;
cmd.arg--;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev,
&req);
if (req.cmd->error != MMC_ERR_NONE) {
printf("erase err2: %d\n", req.cmd->error);
return (block);
}
/* Erase range. */
memset(&req, 0, sizeof(req));
memset(&cmd, 0, sizeof(cmd));
req.cmd = &cmd;
cmd.opcode = MMC_ERASE;
cmd.arg = 0;
cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev,
&req);
if (req.cmd->error != MMC_ERR_NONE) {
printf("erase err3 %d\n", req.cmd->error);
return (block);
}
/* Store one of remaining parts for the next call. */
if (bp->bio_pblkno >= sc->eblock || block == start) {
sc->eblock = stop; /* Predict next forward. */
sc->eend = end;
} else {
sc->eblock = block; /* Predict next backward. */
sc->eend = start;
}
return (end);
}
static int
mmcsd_dump(void *arg, void *virtual, vm_offset_t physical,
off_t offset, size_t length)
{
struct disk *disk = arg;
struct mmcsd_softc *sc = (struct mmcsd_softc *)disk->d_drv1;
device_t dev = sc->dev;
struct bio bp;
daddr_t block, end;
/* length zero is special and really means flush buffers to media */
if (!length)
return (0);
bzero(&bp, sizeof(struct bio));
bp.bio_disk = disk;
bp.bio_pblkno = offset / disk->d_sectorsize;
bp.bio_bcount = length;
bp.bio_data = virtual;
bp.bio_cmd = BIO_WRITE;
end = bp.bio_pblkno + bp.bio_bcount / sc->disk->d_sectorsize;
MMCBUS_ACQUIRE_BUS(device_get_parent(dev), dev);
block = mmcsd_rw(sc, &bp);
MMCBUS_RELEASE_BUS(device_get_parent(dev), dev);
return ((end < block) ? EIO : 0);
}
static void
mmcsd_task(void *arg)
{
struct mmcsd_softc *sc = (struct mmcsd_softc*)arg;
struct bio *bp;
int sz;
daddr_t block, end;
device_t dev;
dev = sc->dev;
while (1) {
MMCSD_LOCK(sc);
do {
if (sc->running == 0)
goto out;
bp = bioq_takefirst(&sc->bio_queue);
if (bp == NULL)
msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0);
} while (bp == NULL);
MMCSD_UNLOCK(sc);
if (bp->bio_cmd != BIO_READ && mmc_get_read_only(dev)) {
bp->bio_error = EROFS;
bp->bio_resid = bp->bio_bcount;
bp->bio_flags |= BIO_ERROR;
biodone(bp);
continue;
}
MMCBUS_ACQUIRE_BUS(device_get_parent(dev), dev);
sz = sc->disk->d_sectorsize;
block = bp->bio_pblkno;
end = bp->bio_pblkno + (bp->bio_bcount / sz);
if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
/* Access to the remaining erase block obsoletes it. */
if (block < sc->eend && end > sc->eblock)
sc->eblock = sc->eend = 0;
block = mmcsd_rw(sc, bp);
} else if (bp->bio_cmd == BIO_DELETE) {
block = mmcsd_delete(sc, bp);
}
MMCBUS_RELEASE_BUS(device_get_parent(dev), dev);
if (block < end) {
bp->bio_error = EIO;
bp->bio_resid = (end - block) * sz;
bp->bio_flags |= BIO_ERROR;
}
biodone(bp);
}
out:
/* tell parent we're done */
sc->running = -1;
MMCSD_UNLOCK(sc);
wakeup(sc);
kproc_exit(0);
}
static int
mmcsd_bus_bit_width(device_t dev)
{
if (mmc_get_bus_width(dev) == bus_width_1)
return (1);
if (mmc_get_bus_width(dev) == bus_width_4)
return (4);
return (8);
}
static device_method_t mmcsd_methods[] = {
DEVMETHOD(device_probe, mmcsd_probe),
DEVMETHOD(device_attach, mmcsd_attach),
DEVMETHOD(device_detach, mmcsd_detach),
DEVMETHOD(device_suspend, mmcsd_suspend),
DEVMETHOD(device_resume, mmcsd_resume),
DEVMETHOD_END
};
static driver_t mmcsd_driver = {
"mmcsd",
mmcsd_methods,
sizeof(struct mmcsd_softc),
};
static devclass_t mmcsd_devclass;
DRIVER_MODULE(mmcsd, mmc, mmcsd_driver, mmcsd_devclass, NULL, NULL);