/* * Copyright (c) 2001 Cameron Grant <cg@freebsd.org> * 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> #ifdef USING_MUTEX #include <sys/sx.h> #endif SND_DECLARE_FILE("$FreeBSD: src/sys/dev/sound/pcm/sndstat.c,v 1.17.2.1 2004/09/14 06:43:46 truckman Exp $"); #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_version = D_VERSION, .d_flags = D_NEEDGIANT, .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 sx sndstat_lock; #endif static struct sbuf sndstat_sbuf; static struct cdev *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(); sx_xlock(&sndstat_lock); if (verbose < 0 || verbose > 3) error = EINVAL; else sndstat_verbose = verbose; sx_xunlock(&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(struct cdev *i_dev, int flags, int mode, struct thread *td) { intrmask_t s; int error; s = spltty(); sx_xlock(&sndstat_lock); if (sndstat_isopen) { sx_xunlock(&sndstat_lock); splx(s); return EBUSY; } sndstat_isopen = 1; sx_xunlock(&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(); sx_xlock(&sndstat_lock); sndstat_isopen = 0; sx_xunlock(&sndstat_lock); splx(s); } return (error); } static int sndstat_close(struct cdev *i_dev, int flags, int mode, struct thread *td) { intrmask_t s; s = spltty(); sx_xlock(&sndstat_lock); if (!sndstat_isopen) { sx_xunlock(&sndstat_lock); splx(s); return EBADF; } sbuf_delete(&sndstat_sbuf); sndstat_isopen = 0; sx_xunlock(&sndstat_lock); splx(s); return 0; } static int sndstat_read(struct cdev *i_dev, struct uio *buf, int flag) { intrmask_t s; int l, err; s = spltty(); sx_xlock(&sndstat_lock); if (!sndstat_isopen) { sx_xunlock(&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; sx_xunlock(&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(); sx_xlock(&sndstat_lock); SLIST_INSERT_HEAD(&sndstat_devlist, ent, link); if (type == SS_TYPE_MODULE) sndstat_files++; sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit; sx_xunlock(&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(); sx_xlock(&sndstat_lock); SLIST_FOREACH(ent, &sndstat_devlist, link) { if (ent->dev == dev) { SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link); sx_xunlock(&sndstat_lock); splx(s); free(ent, M_DEVBUF); return 0; } } sx_xunlock(&sndstat_lock); splx(s); return ENXIO; } int sndstat_unregisterfile(char *str) { intrmask_t s; struct sndstat_entry *ent; s = spltty(); sx_xlock(&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--; sx_xunlock(&sndstat_lock); splx(s); free(ent, M_DEVBUF); return 0; } } sx_xunlock(&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) { sx_init(&sndstat_lock, "sndstat"); 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(); sx_xlock(&sndstat_lock); if (sndstat_isopen) { sx_xunlock(&sndstat_lock); splx(s); return EBUSY; } if (sndstat_dev) destroy_dev(sndstat_dev); sndstat_dev = 0; splx(s); sx_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);