2 * Copyright (c) 2001 Cameron Grant <cg@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <dev/sound/pcm/sound.h>
28 #include <dev/sound/pcm/vchan.h>
33 SND_DECLARE_FILE("$FreeBSD$");
35 #define SS_TYPE_MODULE 0
36 #define SS_TYPE_FIRST 1
38 #define SS_TYPE_MIDI 2
39 #define SS_TYPE_SEQUENCER 3
40 #define SS_TYPE_LAST 3
42 static d_open_t sndstat_open;
43 static d_close_t sndstat_close;
44 static d_read_t sndstat_read;
46 static struct cdevsw sndstat_cdevsw = {
47 .d_version = D_VERSION,
48 .d_flags = D_NEEDGIANT,
49 .d_open = sndstat_open,
50 .d_close = sndstat_close,
51 .d_read = sndstat_read,
55 struct sndstat_entry {
56 SLIST_ENTRY(sndstat_entry) link;
59 sndstat_handler handler;
64 static struct mtx sndstat_lock;
66 static struct sbuf sndstat_sbuf;
67 static struct cdev *sndstat_dev = 0;
68 static int sndstat_isopen = 0;
69 static int sndstat_bufptr;
70 static int sndstat_maxunit = -1;
71 static int sndstat_files = 0;
73 static SLIST_HEAD(, sndstat_entry) sndstat_devlist = SLIST_HEAD_INITIALIZER(none);
76 SYSCTL_INT(_hw_snd, OID_AUTO, sndstat_isopen, CTLFLAG_RW,
77 &sndstat_isopen, 1, "sndstat emergency exit");
82 TUNABLE_INT("hw.snd.verbose", &snd_verbose);
84 TUNABLE_INT_DECL("hw.snd.verbose", 1, snd_verbose);
87 static int sndstat_prepare(struct sbuf *s);
90 sysctl_hw_sndverbose(SYSCTL_HANDLER_ARGS)
94 verbose = snd_verbose;
95 error = sysctl_handle_int(oidp, &verbose, sizeof(verbose), req);
96 if (error == 0 && req->newptr != NULL) {
97 mtx_lock(&sndstat_lock);
98 if (verbose < 0 || verbose > 4)
101 snd_verbose = verbose;
102 mtx_unlock(&sndstat_lock);
106 SYSCTL_PROC(_hw_snd, OID_AUTO, verbose, CTLTYPE_INT | CTLFLAG_RW,
107 0, sizeof(int), sysctl_hw_sndverbose, "I", "verbosity level");
110 sndstat_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
114 mtx_lock(&sndstat_lock);
115 if (sndstat_isopen) {
116 mtx_unlock(&sndstat_lock);
120 mtx_unlock(&sndstat_lock);
121 if (sbuf_new(&sndstat_sbuf, NULL, 4096, SBUF_AUTOEXTEND) == NULL) {
126 error = (sndstat_prepare(&sndstat_sbuf) > 0) ? 0 : ENOMEM;
129 mtx_lock(&sndstat_lock);
131 mtx_unlock(&sndstat_lock);
137 sndstat_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
139 mtx_lock(&sndstat_lock);
140 if (!sndstat_isopen) {
141 mtx_unlock(&sndstat_lock);
145 mtx_unlock(&sndstat_lock);
146 sbuf_delete(&sndstat_sbuf);
148 mtx_lock(&sndstat_lock);
150 mtx_unlock(&sndstat_lock);
156 sndstat_read(struct cdev *i_dev, struct uio *buf, int flag)
160 mtx_lock(&sndstat_lock);
161 if (!sndstat_isopen) {
162 mtx_unlock(&sndstat_lock);
165 mtx_unlock(&sndstat_lock);
167 l = min(buf->uio_resid, sbuf_len(&sndstat_sbuf) - sndstat_bufptr);
168 err = (l > 0)? uiomove(sbuf_data(&sndstat_sbuf) + sndstat_bufptr, l, buf) : 0;
174 /************************************************************************/
176 static struct sndstat_entry *
177 sndstat_find(int type, int unit)
179 struct sndstat_entry *ent;
181 SLIST_FOREACH(ent, &sndstat_devlist, link) {
182 if (ent->type == type && ent->unit == unit)
190 sndstat_acquire(void)
192 mtx_lock(&sndstat_lock);
193 if (sndstat_isopen) {
194 mtx_unlock(&sndstat_lock);
198 mtx_unlock(&sndstat_lock);
203 sndstat_release(void)
205 mtx_lock(&sndstat_lock);
206 if (!sndstat_isopen) {
207 mtx_unlock(&sndstat_lock);
211 mtx_unlock(&sndstat_lock);
216 sndstat_register(device_t dev, char *str, sndstat_handler handler)
218 struct sndstat_entry *ent;
223 unit = device_get_unit(dev);
224 devtype = device_get_name(dev);
225 if (!strcmp(devtype, "pcm"))
227 else if (!strcmp(devtype, "midi"))
229 else if (!strcmp(devtype, "sequencer"))
230 type = SS_TYPE_SEQUENCER;
234 type = SS_TYPE_MODULE;
238 ent = malloc(sizeof *ent, M_DEVBUF, M_WAITOK | M_ZERO);
243 ent->handler = handler;
245 mtx_lock(&sndstat_lock);
246 SLIST_INSERT_HEAD(&sndstat_devlist, ent, link);
247 if (type == SS_TYPE_MODULE)
249 sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit;
250 mtx_unlock(&sndstat_lock);
256 sndstat_registerfile(char *str)
258 return sndstat_register(NULL, str, NULL);
262 sndstat_unregister(device_t dev)
264 struct sndstat_entry *ent;
266 mtx_lock(&sndstat_lock);
267 SLIST_FOREACH(ent, &sndstat_devlist, link) {
268 if (ent->dev == dev) {
269 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
270 mtx_unlock(&sndstat_lock);
276 mtx_unlock(&sndstat_lock);
282 sndstat_unregisterfile(char *str)
284 struct sndstat_entry *ent;
286 mtx_lock(&sndstat_lock);
287 SLIST_FOREACH(ent, &sndstat_devlist, link) {
288 if (ent->dev == NULL && ent->str == str) {
289 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
291 mtx_unlock(&sndstat_lock);
297 mtx_unlock(&sndstat_lock);
302 /************************************************************************/
305 sndstat_prepare(struct sbuf *s)
307 struct sndstat_entry *ent;
310 sbuf_printf(s, "FreeBSD Audio Driver (newpcm: %ubit)\n",
311 (unsigned int)sizeof(intpcm_t) << 3);
312 if (SLIST_EMPTY(&sndstat_devlist)) {
313 sbuf_printf(s, "No devices installed.\n");
318 sbuf_printf(s, "Installed devices:\n");
320 for (i = 0; i <= sndstat_maxunit; i++) {
321 for (j = SS_TYPE_FIRST; j <= SS_TYPE_LAST; j++) {
322 ent = sndstat_find(j, i);
325 sbuf_printf(s, "%s:", device_get_nameunit(ent->dev));
326 sbuf_printf(s, " <%s>", device_get_desc(ent->dev));
327 sbuf_printf(s, " %s", ent->str);
329 ent->handler(s, ent->dev, snd_verbose);
331 sbuf_printf(s, " [no handler]");
332 sbuf_printf(s, "\n");
336 if (snd_verbose >= 3 && sndstat_files > 0) {
337 sbuf_printf(s, "\nFile Versions:\n");
339 SLIST_FOREACH(ent, &sndstat_devlist, link) {
340 if (ent->dev == NULL && ent->str != NULL)
341 sbuf_printf(s, "%s\n", ent->str);
352 mtx_init(&sndstat_lock, "sndstat", "sndstat lock", MTX_DEF);
353 sndstat_dev = make_dev(&sndstat_cdevsw, SND_DEV_STATUS, UID_ROOT, GID_WHEEL, 0444, "sndstat");
355 return (sndstat_dev != 0)? 0 : ENXIO;
361 mtx_lock(&sndstat_lock);
362 if (sndstat_isopen) {
363 mtx_unlock(&sndstat_lock);
368 mtx_unlock(&sndstat_lock);
371 destroy_dev(sndstat_dev);
374 mtx_destroy(&sndstat_lock);
379 sndstat_sysinit(void *p)
385 sndstat_sysuninit(void *p)
389 error = sndstat_uninit();
390 KASSERT(error == 0, ("%s: error = %d", __func__, error));
393 SYSINIT(sndstat_sysinit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysinit, NULL);
394 SYSUNINIT(sndstat_sysuninit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysuninit, NULL);