diff options
Diffstat (limited to 'sys/dev/sound/pcm/sndstat.c')
| -rw-r--r-- | sys/dev/sound/pcm/sndstat.c | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/sys/dev/sound/pcm/sndstat.c b/sys/dev/sound/pcm/sndstat.c new file mode 100644 index 0000000..a15e7f4 --- /dev/null +++ b/sys/dev/sound/pcm/sndstat.c @@ -0,0 +1,392 @@ +/* + * Copyright (c) 2001 Cameron Grant <gandalf@vilnya.demon.co.uk> + * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 <dev/sound/pcm/sound.h> +#include <dev/sound/pcm/vchan.h> + +SND_DECLARE_FILE("$FreeBSD$"); + +#define SS_TYPE_MODULE 0 +#define SS_TYPE_FIRST 1 +#define SS_TYPE_PCM 1 +#define SS_TYPE_MIDI 2 +#define SS_TYPE_SEQUENCER 3 +#define SS_TYPE_LAST 3 + +static d_open_t sndstat_open; +static d_close_t sndstat_close; +static d_read_t sndstat_read; + +static struct cdevsw sndstat_cdevsw = { + .d_open = sndstat_open, + .d_close = sndstat_close, + .d_read = sndstat_read, + .d_name = "sndstat", + .d_maj = SND_CDEV_MAJOR, +}; + +struct sndstat_entry { + SLIST_ENTRY(sndstat_entry) link; + device_t dev; + char *str; + sndstat_handler handler; + int type, unit; +}; + +#ifdef USING_MUTEX +static struct mtx sndstat_lock; +#endif +static struct sbuf sndstat_sbuf; +static dev_t sndstat_dev = 0; +static int sndstat_isopen = 0; +static int sndstat_bufptr; +static int sndstat_maxunit = -1; +static int sndstat_files = 0; + +static SLIST_HEAD(, sndstat_entry) sndstat_devlist = SLIST_HEAD_INITIALIZER(none); + +static int sndstat_verbose = 1; +#ifdef USING_MUTEX +TUNABLE_INT("hw.snd.verbose", &sndstat_verbose); +#else +TUNABLE_INT_DECL("hw.snd.verbose", 1, sndstat_verbose); +#endif + +static int sndstat_prepare(struct sbuf *s); + +static int +sysctl_hw_sndverbose(SYSCTL_HANDLER_ARGS) +{ + intrmask_t s; + int error, verbose; + + verbose = sndstat_verbose; + error = sysctl_handle_int(oidp, &verbose, sizeof(verbose), req); + if (error == 0 && req->newptr != NULL) { + s = spltty(); + mtx_lock(&sndstat_lock); + if (verbose < 0 || verbose > 3) + error = EINVAL; + else + sndstat_verbose = verbose; + mtx_unlock(&sndstat_lock); + splx(s); + } + return error; +} +SYSCTL_PROC(_hw_snd, OID_AUTO, verbose, CTLTYPE_INT | CTLFLAG_RW, + 0, sizeof(int), sysctl_hw_sndverbose, "I", ""); + +static int +sndstat_open(dev_t i_dev, int flags, int mode, struct thread *td) +{ + intrmask_t s; + int error; + + s = spltty(); + mtx_lock(&sndstat_lock); + if (sndstat_isopen) { + mtx_unlock(&sndstat_lock); + splx(s); + return EBUSY; + } + sndstat_isopen = 1; + mtx_unlock(&sndstat_lock); + splx(s); + if (sbuf_new(&sndstat_sbuf, NULL, 4096, 0) == NULL) { + error = ENXIO; + goto out; + } + sndstat_bufptr = 0; + error = (sndstat_prepare(&sndstat_sbuf) > 0) ? 0 : ENOMEM; +out: + if (error) { + s = spltty(); + mtx_lock(&sndstat_lock); + sndstat_isopen = 0; + mtx_unlock(&sndstat_lock); + splx(s); + } + return (error); +} + +static int +sndstat_close(dev_t i_dev, int flags, int mode, struct thread *td) +{ + intrmask_t s; + + s = spltty(); + mtx_lock(&sndstat_lock); + if (!sndstat_isopen) { + mtx_unlock(&sndstat_lock); + splx(s); + return EBADF; + } + sbuf_delete(&sndstat_sbuf); + sndstat_isopen = 0; + + mtx_unlock(&sndstat_lock); + splx(s); + return 0; +} + +static int +sndstat_read(dev_t i_dev, struct uio *buf, int flag) +{ + intrmask_t s; + int l, err; + + s = spltty(); + mtx_lock(&sndstat_lock); + if (!sndstat_isopen) { + mtx_unlock(&sndstat_lock); + splx(s); + return EBADF; + } + l = min(buf->uio_resid, sbuf_len(&sndstat_sbuf) - sndstat_bufptr); + err = (l > 0)? uiomove(sbuf_data(&sndstat_sbuf) + sndstat_bufptr, l, buf) : 0; + sndstat_bufptr += l; + + mtx_unlock(&sndstat_lock); + splx(s); + return err; +} + +/************************************************************************/ + +static struct sndstat_entry * +sndstat_find(int type, int unit) +{ + struct sndstat_entry *ent; + + SLIST_FOREACH(ent, &sndstat_devlist, link) { + if (ent->type == type && ent->unit == unit) + return ent; + } + + return NULL; +} + +int +sndstat_register(device_t dev, char *str, sndstat_handler handler) +{ + intrmask_t s; + struct sndstat_entry *ent; + const char *devtype; + int type, unit; + + if (dev) { + unit = device_get_unit(dev); + devtype = device_get_name(dev); + if (!strcmp(devtype, "pcm")) + type = SS_TYPE_PCM; + else if (!strcmp(devtype, "midi")) + type = SS_TYPE_MIDI; + else if (!strcmp(devtype, "sequencer")) + type = SS_TYPE_SEQUENCER; + else + return EINVAL; + } else { + type = SS_TYPE_MODULE; + unit = -1; + } + + ent = malloc(sizeof *ent, M_DEVBUF, M_ZERO | M_WAITOK); + if (!ent) + return ENOSPC; + + ent->dev = dev; + ent->str = str; + ent->type = type; + ent->unit = unit; + ent->handler = handler; + + s = spltty(); + mtx_lock(&sndstat_lock); + SLIST_INSERT_HEAD(&sndstat_devlist, ent, link); + if (type == SS_TYPE_MODULE) + sndstat_files++; + sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit; + mtx_unlock(&sndstat_lock); + splx(s); + + return 0; +} + +int +sndstat_registerfile(char *str) +{ + return sndstat_register(NULL, str, NULL); +} + +int +sndstat_unregister(device_t dev) +{ + intrmask_t s; + struct sndstat_entry *ent; + + s = spltty(); + mtx_lock(&sndstat_lock); + SLIST_FOREACH(ent, &sndstat_devlist, link) { + if (ent->dev == dev) { + SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link); + mtx_unlock(&sndstat_lock); + splx(s); + free(ent, M_DEVBUF); + + return 0; + } + } + mtx_unlock(&sndstat_lock); + splx(s); + + return ENXIO; +} + +int +sndstat_unregisterfile(char *str) +{ + intrmask_t s; + struct sndstat_entry *ent; + + s = spltty(); + mtx_lock(&sndstat_lock); + SLIST_FOREACH(ent, &sndstat_devlist, link) { + if (ent->dev == NULL && ent->str == str) { + SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link); + sndstat_files--; + mtx_unlock(&sndstat_lock); + splx(s); + free(ent, M_DEVBUF); + + return 0; + } + } + mtx_unlock(&sndstat_lock); + splx(s); + + return ENXIO; +} + +/************************************************************************/ + +static int +sndstat_prepare(struct sbuf *s) +{ + struct sndstat_entry *ent; + int i, j; + + sbuf_printf(s, "FreeBSD Audio Driver (newpcm)\n"); + if (SLIST_EMPTY(&sndstat_devlist)) { + sbuf_printf(s, "No devices installed.\n"); + sbuf_finish(s); + return sbuf_len(s); + } + + sbuf_printf(s, "Installed devices:\n"); + + for (i = 0; i <= sndstat_maxunit; i++) { + for (j = SS_TYPE_FIRST; j <= SS_TYPE_LAST; j++) { + ent = sndstat_find(j, i); + if (!ent) + continue; + sbuf_printf(s, "%s:", device_get_nameunit(ent->dev)); + sbuf_printf(s, " <%s>", device_get_desc(ent->dev)); + sbuf_printf(s, " %s", ent->str); + if (ent->handler) + ent->handler(s, ent->dev, sndstat_verbose); + else + sbuf_printf(s, " [no handler]"); + sbuf_printf(s, "\n"); + } + } + + if (sndstat_verbose >= 3 && sndstat_files > 0) { + sbuf_printf(s, "\nFile Versions:\n"); + + SLIST_FOREACH(ent, &sndstat_devlist, link) { + if (ent->dev == NULL && ent->str != NULL) + sbuf_printf(s, "%s\n", ent->str); + } + } + + sbuf_finish(s); + return sbuf_len(s); +} + +static int +sndstat_init(void) +{ + mtx_init(&sndstat_lock, "sndstat", NULL, 0); + sndstat_dev = make_dev(&sndstat_cdevsw, SND_DEV_STATUS, UID_ROOT, GID_WHEEL, 0444, "sndstat"); + + return (sndstat_dev != 0)? 0 : ENXIO; +} + +static int +sndstat_uninit(void) +{ + intrmask_t s; + + s = spltty(); + mtx_lock(&sndstat_lock); + if (sndstat_isopen) { + mtx_unlock(&sndstat_lock); + splx(s); + return EBUSY; + } + + if (sndstat_dev) + destroy_dev(sndstat_dev); + sndstat_dev = 0; + + splx(s); + mtx_destroy(&sndstat_lock); + return 0; +} + +int +sndstat_busy(void) +{ + return (sndstat_isopen); +} + +static void +sndstat_sysinit(void *p) +{ + sndstat_init(); +} + +static void +sndstat_sysuninit(void *p) +{ + sndstat_uninit(); +} + +SYSINIT(sndstat_sysinit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysinit, NULL); +SYSUNINIT(sndstat_sysuninit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysuninit, NULL); + + |
