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/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#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/mmcvar.h>
#include <dev/mmc/mmcreg.h>
#include "mmcbus_if.h"
struct mmcsd_softc {
device_t dev;
struct mtx sc_mtx;
struct disk *disk;
struct proc *p;
struct bio_queue_head bio_queue;
};
#define MULTI_BLOCK_READ_BROKEN
/* bus entry points */
static int mmcsd_probe(device_t dev);
static int mmcsd_attach(device_t dev);
static int mmcsd_detach(device_t dev);
/* disk routines */
static int mmcsd_open(struct disk *dp);
static int mmcsd_close(struct disk *dp);
static void mmcsd_strategy(struct bio *bp);
static void mmcsd_task(void *arg);
#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_set_desc(dev, "mmc or sd flash card");
return (0);
}
static int
mmcsd_attach(device_t dev)
{
struct mmcsd_softc *sc;
sc = device_get_softc(dev);
sc->dev = dev;
MMCSD_LOCK_INIT(sc);
sc->disk = disk_alloc();
sc->disk->d_open = mmcsd_open;
sc->disk->d_close = mmcsd_close;
sc->disk->d_strategy = mmcsd_strategy;
// sc->disk->d_dump = mmcsd_dump; Need polling mmc layer
sc->disk->d_name = "mmcsd";
sc->disk->d_drv1 = sc;
sc->disk->d_maxsize = DFLTPHYS;
sc->disk->d_sectorsize = mmc_get_sector_size(dev);
sc->disk->d_mediasize = mmc_get_media_size(dev);
sc->disk->d_unit = device_get_unit(dev);
disk_create(sc->disk, DISK_VERSION);
bioq_init(&sc->bio_queue);
kthread_create(&mmcsd_task, sc, &sc->p, 0, 0, "task: mmc/sd card");
return (0);
}
static int
mmcsd_detach(device_t dev)
{
return (EBUSY); /* XXX */
}
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);
bioq_disksort(&sc->bio_queue, bp);
wakeup(sc);
MMCSD_UNLOCK(sc);
}
static void
mmcsd_task(void *arg)
{
struct mmcsd_softc *sc = (struct mmcsd_softc*)arg;
struct bio *bp;
int sz;
daddr_t block, end;
struct mmc_command cmd;
struct mmc_command stop;
struct mmc_request req;
struct mmc_data data;
device_t dev;
dev = sc->dev;
for (;;) {
MMCSD_LOCK(sc);
do {
bp = bioq_first(&sc->bio_queue);
if (bp == NULL)
msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0);
} while (bp == NULL);
bioq_remove(&sc->bio_queue, bp);
MMCSD_UNLOCK(sc);
MMCBUS_ACQUIRE_BUS(device_get_parent(dev), dev);
// printf("mmc_task: request %p for block %lld\n", bp, bp->bio_pblkno);
sz = sc->disk->d_sectorsize;
end = bp->bio_pblkno + (bp->bio_bcount / sz);
// XXX should use read/write_mulit
for (block = bp->bio_pblkno; block < end;) {
char *vaddr = bp->bio_data + (block - bp->bio_pblkno) * sz;
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) {
#ifdef MULTI_BLOCK_READ
if (end - block > 1)
cmd.opcode = MMC_READ_MULTIPLE_BLOCK;
else
cmd.opcode = MMC_READ_SINGLE_BLOCK;
#else
cmd.opcode = MMC_READ_SINGLE_BLOCK;
#endif
} else
cmd.opcode = MMC_WRITE_BLOCK;
cmd.arg = block << 9;
cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
// data.timeout_ns = ;
// data.timeout_clks = ;
data.data = vaddr;
data.mrq = &req;
if (bp->bio_cmd == BIO_READ) {
data.flags = MMC_DATA_READ;
#ifdef MULTI_BLOCK_READ
data.len = bp->bio_bcount;
if (end - block > 1) {
req.stop = &stop;
data.flags |= MMC_DATA_MULTI;
}
printf("Len %d %lld-%lld flags %#x sz %d\n",
data.len, block, end, data.flags, sz);
block = end;
#else
data.len = sz;
block++;
#endif
} else {
data.flags = MMC_DATA_WRITE;
data.len = sz;
block++;
}
stop.opcode = MMC_STOP_TRANSMISSION;
stop.arg = 0;
stop.flags = MMC_RSP_R1B | MMC_CMD_AC;
MMCBUS_WAIT_FOR_REQUEST(device_get_parent(dev), dev,
&req);
// XXX error handling
//XXX while (!(mmc_send_status(dev) & R1_READY_FOR_DATA))
// continue;
// XXX decode mmc status
}
MMCBUS_RELEASE_BUS(device_get_parent(dev), dev);
biodone(bp);
}
}
static device_method_t mmcsd_methods[] = {
DEVMETHOD(device_probe, mmcsd_probe),
DEVMETHOD(device_attach, mmcsd_attach),
DEVMETHOD(device_detach, mmcsd_detach),
{0, 0},
};
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, 0, 0);
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