279 lines
7.0 KiB
C
279 lines
7.0 KiB
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.
|
|
*/
|
|
|
|
#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;
|
|
int running;
|
|
};
|
|
|
|
#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);
|
|
|
|
sc->running = 1;
|
|
kthread_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);
|
|
|
|
/* kill thread */
|
|
MMCSD_LOCK(sc);
|
|
sc->running = 0;
|
|
wakeup(sc);
|
|
MMCSD_UNLOCK(sc);
|
|
|
|
/* wait for thread to finish. XXX probably want timeout. -sorbo */
|
|
MMCSD_LOCK(sc);
|
|
while (sc->running != -1)
|
|
msleep(sc, &sc->sc_mtx, PRIBIO, "detach", 0);
|
|
MMCSD_UNLOCK(sc);
|
|
|
|
/* kill disk */
|
|
disk_destroy(sc->disk);
|
|
/* XXX destroy anything in queue */
|
|
|
|
MMCSD_LOCK_DESTROY(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);
|
|
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;
|
|
while (sc->running) {
|
|
MMCSD_LOCK(sc);
|
|
do {
|
|
bp = bioq_first(&sc->bio_queue);
|
|
if (bp == NULL)
|
|
msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0);
|
|
} while (bp == NULL && sc->running);
|
|
if (bp)
|
|
bioq_remove(&sc->bio_queue, bp);
|
|
MMCSD_UNLOCK(sc);
|
|
if (!sc->running)
|
|
break;
|
|
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);
|
|
}
|
|
|
|
/* tell parent we're done */
|
|
MMCSD_LOCK(sc);
|
|
sc->running = -1;
|
|
wakeup(sc);
|
|
MMCSD_UNLOCK(sc);
|
|
|
|
kthread_exit(0);
|
|
}
|
|
|
|
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);
|