30743982ca
should be easily adapted to SD 2.0 (aka SDHC), SDIO, MMC and MMCplus cards. At the present time, there's only one bridge driver for the ARM9 based Atmel AT91RM9200.
245 lines
6.3 KiB
C
245 lines
6.3 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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#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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};
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#define MULTI_BLOCK_READ_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_set_desc(dev, "mmc or sd flash 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 = DFLTPHYS;
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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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sc->disk->d_unit = device_get_unit(dev);
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disk_create(sc->disk, DISK_VERSION);
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bioq_init(&sc->bio_queue);
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kthread_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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return (EBUSY); /* XXX */
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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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for (;;) {
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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);
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bioq_remove(&sc->bio_queue, bp);
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MMCSD_UNLOCK(sc);
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MMCBUS_ACQUIRE_BUS(device_get_parent(dev), dev);
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// printf("mmc_task: request %p for block %lld\n", bp, bp->bio_pblkno);
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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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// XXX should use read/write_mulit
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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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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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#ifdef MULTI_BLOCK_READ
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if (end - block > 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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cmd.opcode = MMC_READ_SINGLE_BLOCK;
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#endif
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} else
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cmd.opcode = MMC_WRITE_BLOCK;
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cmd.arg = block << 9;
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cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
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// data.timeout_ns = ;
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// data.timeout_clks = ;
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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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#ifdef MULTI_BLOCK_READ
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data.len = bp->bio_bcount;
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if (end - block > 1) {
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req.stop = &stop;
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data.flags |= MMC_DATA_MULTI;
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}
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printf("Len %d %lld-%lld flags %#x sz %d\n",
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data.len, block, end, data.flags, sz);
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block = end;
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#else
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data.len = sz;
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block++;
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#endif
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} else {
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data.flags = MMC_DATA_WRITE;
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data.len = sz;
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block++;
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}
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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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MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev,
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&req);
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// XXX error handling
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//XXX while (!(mmc_send_status(dev) & R1_READY_FOR_DATA))
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// continue;
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// XXX decode mmc status
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}
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MMCBUS_RELEASE_BUS(device_get_parent(dev), dev);
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biodone(bp);
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}
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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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