67d752c3d4
log message in a way a bit more common for disk devices. Also it will allow mmcsd driver to use MMC/SD specific commands when needed.
325 lines
9.2 KiB
C
325 lines
9.2 KiB
C
/*-
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* Copyright (c) 2006 Bernd Walter. All rights reserved.
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* Copyright (c) 2006 M. Warner Losh. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Portions of this software may have been developed with reference to
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* the SD Simplified Specification. The following disclaimer may apply:
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*
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* The following conditions apply to the release of the simplified
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* specification ("Simplified Specification") by the SD Card Association and
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* the SD Group. The Simplified Specification is a subset of the complete SD
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* Specification which is owned by the SD Card Association and the SD
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* Group. This Simplified Specification is provided on a non-confidential
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* basis subject to the disclaimers below. Any implementation of the
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* Simplified Specification may require a license from the SD Card
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* Association, SD Group, SD-3C LLC or other third parties.
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*
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* Disclaimers:
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*
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* The information contained in the Simplified Specification is presented only
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* as a standard specification for SD Cards and SD Host/Ancillary products and
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* is provided "AS-IS" without any representations or warranties of any
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* kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD
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* Card Association for any damages, any infringements of patents or other
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* right of the SD Group, SD-3C LLC, the SD Card Association or any third
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* parties, which may result from its use. No license is granted by
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* implication, estoppel or otherwise under any patent or other rights of the
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* SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing
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* herein shall be construed as an obligation by the SD Group, the SD-3C LLC
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* or the SD Card Association to disclose or distribute any technical
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* information, know-how or other confidential information to any third party.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bio.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/kthread.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <geom/geom_disk.h>
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#include <dev/mmc/mmcvar.h>
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#include <dev/mmc/mmcreg.h>
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#include "mmcbus_if.h"
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struct mmcsd_softc {
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device_t dev;
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struct mtx sc_mtx;
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struct disk *disk;
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struct proc *p;
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struct bio_queue_head bio_queue;
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int running;
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};
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#define MULTI_BLOCK_BROKEN
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/* bus entry points */
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static int mmcsd_probe(device_t dev);
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static int mmcsd_attach(device_t dev);
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static int mmcsd_detach(device_t dev);
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/* disk routines */
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static int mmcsd_open(struct disk *dp);
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static int mmcsd_close(struct disk *dp);
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static void mmcsd_strategy(struct bio *bp);
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static void mmcsd_task(void *arg);
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#define MMCSD_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
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#define MMCSD_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
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#define MMCSD_LOCK_INIT(_sc) \
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mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \
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"mmcsd", MTX_DEF)
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#define MMCSD_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
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#define MMCSD_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
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#define MMCSD_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
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static int
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mmcsd_probe(device_t dev)
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{
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device_quiet(dev);
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device_set_desc(dev, "MMC/SD Memory Card");
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return (0);
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}
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static int
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mmcsd_attach(device_t dev)
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{
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struct mmcsd_softc *sc;
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sc = device_get_softc(dev);
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sc->dev = dev;
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MMCSD_LOCK_INIT(sc);
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sc->disk = disk_alloc();
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sc->disk->d_open = mmcsd_open;
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sc->disk->d_close = mmcsd_close;
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sc->disk->d_strategy = mmcsd_strategy;
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// sc->disk->d_dump = mmcsd_dump; Need polling mmc layer
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sc->disk->d_name = "mmcsd";
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sc->disk->d_drv1 = sc;
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sc->disk->d_maxsize = MAXPHYS; /* Maybe ask bridge? */
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sc->disk->d_sectorsize = mmc_get_sector_size(dev);
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sc->disk->d_mediasize = mmc_get_media_size(dev) *
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mmc_get_sector_size(dev);
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sc->disk->d_unit = device_get_unit(dev);
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device_printf(dev, "%juMB <%s Memory Card>%s at %s %dMHz/%dbit\n",
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sc->disk->d_mediasize / 1048576,
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(mmc_get_card_type(dev) == mode_mmc)?"MMC":
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(mmc_get_high_cap(dev)?"SDHC":"SD"),
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mmc_get_read_only(dev)?" (read-only)":"",
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device_get_nameunit(device_get_parent(sc->dev)),
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mmc_get_tran_speed(dev)/1000000,
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(mmc_get_bus_width(dev) == bus_width_1)?1:
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((mmc_get_bus_width(dev) == bus_width_4)?4:8));
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disk_create(sc->disk, DISK_VERSION);
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bioq_init(&sc->bio_queue);
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sc->running = 1;
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kproc_create(&mmcsd_task, sc, &sc->p, 0, 0, "task: mmc/sd card");
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return (0);
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}
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static int
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mmcsd_detach(device_t dev)
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{
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struct mmcsd_softc *sc = device_get_softc(dev);
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/* kill thread */
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MMCSD_LOCK(sc);
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sc->running = 0;
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wakeup(sc);
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MMCSD_UNLOCK(sc);
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/* wait for thread to finish. XXX probably want timeout. -sorbo */
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MMCSD_LOCK(sc);
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while (sc->running != -1)
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msleep(sc, &sc->sc_mtx, PRIBIO, "detach", 0);
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MMCSD_UNLOCK(sc);
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/* kill disk */
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disk_destroy(sc->disk);
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/* XXX destroy anything in queue */
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MMCSD_LOCK_DESTROY(sc);
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return (0);
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}
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static int
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mmcsd_open(struct disk *dp)
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{
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return (0);
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}
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static int
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mmcsd_close(struct disk *dp)
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{
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return (0);
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}
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static void
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mmcsd_strategy(struct bio *bp)
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{
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struct mmcsd_softc *sc;
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sc = (struct mmcsd_softc *)bp->bio_disk->d_drv1;
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MMCSD_LOCK(sc);
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bioq_disksort(&sc->bio_queue, bp);
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wakeup(sc);
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MMCSD_UNLOCK(sc);
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}
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static void
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mmcsd_task(void *arg)
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{
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struct mmcsd_softc *sc = (struct mmcsd_softc*)arg;
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struct bio *bp;
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int sz;
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daddr_t block, end;
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struct mmc_command cmd;
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struct mmc_command stop;
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struct mmc_request req;
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struct mmc_data data;
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device_t dev;
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dev = sc->dev;
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while (sc->running) {
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MMCSD_LOCK(sc);
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do {
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bp = bioq_first(&sc->bio_queue);
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if (bp == NULL)
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msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0);
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} while (bp == NULL && sc->running);
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if (bp)
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bioq_remove(&sc->bio_queue, bp);
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MMCSD_UNLOCK(sc);
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if (!sc->running)
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break;
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// printf("mmc_task: request %p for block %ju\n", bp, bp->bio_pblkno);
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if (bp->bio_cmd != BIO_READ && mmc_get_read_only(dev)) {
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bp->bio_error = EROFS;
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bp->bio_resid = bp->bio_bcount;
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bp->bio_flags |= BIO_ERROR;
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biodone(bp);
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continue;
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}
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MMCBUS_ACQUIRE_BUS(device_get_parent(dev), dev);
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sz = sc->disk->d_sectorsize;
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end = bp->bio_pblkno + (bp->bio_bcount / sz);
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for (block = bp->bio_pblkno; block < end;) {
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char *vaddr = bp->bio_data + (block - bp->bio_pblkno) * sz;
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int numblocks;
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#ifdef MULTI_BLOCK
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numblocks = end - block;
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#else
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numblocks = 1;
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#endif
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memset(&req, 0, sizeof(req));
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memset(&cmd, 0, sizeof(cmd));
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memset(&stop, 0, sizeof(stop));
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req.cmd = &cmd;
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cmd.data = &data;
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if (bp->bio_cmd == BIO_READ) {
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if (numblocks > 1)
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cmd.opcode = MMC_READ_MULTIPLE_BLOCK;
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else
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cmd.opcode = MMC_READ_SINGLE_BLOCK;
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} else {
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if (numblocks > 1)
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cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
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else
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cmd.opcode = MMC_WRITE_BLOCK;
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}
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cmd.arg = block;
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if (!mmc_get_high_cap(dev))
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cmd.arg <<= 9;
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cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
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data.data = vaddr;
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data.mrq = &req;
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if (bp->bio_cmd == BIO_READ)
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data.flags = MMC_DATA_READ;
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else
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data.flags = MMC_DATA_WRITE;
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data.len = numblocks * sz;
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if (numblocks > 1) {
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data.flags |= MMC_DATA_MULTI;
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stop.opcode = MMC_STOP_TRANSMISSION;
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stop.arg = 0;
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stop.flags = MMC_RSP_R1B | MMC_CMD_AC;
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req.stop = &stop;
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}
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// printf("Len %d %lld-%lld flags %#x sz %d\n",
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// (int)data.len, (long long)block, (long long)end, data.flags, sz);
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MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev,
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&req);
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if (req.cmd->error != MMC_ERR_NONE)
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break;
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block += numblocks;
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}
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MMCBUS_RELEASE_BUS(device_get_parent(dev), dev);
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if (block < end) {
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bp->bio_error = EIO;
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bp->bio_resid = (end - block) * sz;
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bp->bio_flags |= BIO_ERROR;
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}
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biodone(bp);
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}
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/* tell parent we're done */
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MMCSD_LOCK(sc);
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sc->running = -1;
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wakeup(sc);
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MMCSD_UNLOCK(sc);
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kproc_exit(0);
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}
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static device_method_t mmcsd_methods[] = {
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DEVMETHOD(device_probe, mmcsd_probe),
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DEVMETHOD(device_attach, mmcsd_attach),
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DEVMETHOD(device_detach, mmcsd_detach),
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{0, 0},
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};
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static driver_t mmcsd_driver = {
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"mmcsd",
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mmcsd_methods,
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sizeof(struct mmcsd_softc),
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};
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static devclass_t mmcsd_devclass;
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DRIVER_MODULE(mmcsd, mmc, mmcsd_driver, mmcsd_devclass, 0, 0);
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