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
26 * $FreeBSD: src/sys/dev/sound/pcm/sndstat.c,v 1.20.2.2 2005/12/30 19:55:54 netchild Exp $
27 * $DragonFly: src/sys/dev/sound/pcm/sndstat.c,v 1.13 2008/01/06 16:55:51 swildner Exp $
30 #include <dev/sound/pcm/sound.h>
31 #include <dev/sound/pcm/vchan.h>
36 SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pcm/sndstat.c,v 1.13 2008/01/06 16:55:51 swildner Exp $");
38 #define SS_TYPE_MODULE 0
39 #define SS_TYPE_FIRST 1
41 #define SS_TYPE_MIDI 2
42 #define SS_TYPE_SEQUENCER 3
43 #define SS_TYPE_LAST 3
45 static d_open_t sndstat_open;
46 static d_close_t sndstat_close;
47 static d_read_t sndstat_read;
49 static struct dev_ops sndstat_cdevsw = {
50 { "sndstat", SND_CDEV_MAJOR, 0 },
51 /* .d_flags = D_NEEDGIANT, */
52 .d_open = sndstat_open,
53 .d_close = sndstat_close,
54 .d_read = sndstat_read,
57 struct sndstat_entry {
58 SLIST_ENTRY(sndstat_entry) link;
61 sndstat_handler handler;
66 static struct lock sndstat_lock;
68 static struct sbuf sndstat_sbuf;
69 static int sndstat_isopen = 0;
70 static int sndstat_bufptr;
71 static int sndstat_maxunit = -1;
72 static int sndstat_files = 0;
74 static SLIST_HEAD(, sndstat_entry) sndstat_devlist = SLIST_HEAD_INITIALIZER(none);
76 static int sndstat_verbose = 1;
78 TUNABLE_INT("hw.snd.verbose", &sndstat_verbose);
80 TUNABLE_INT_DECL("hw.snd.verbose", 1, sndstat_verbose);
83 static int sndstat_prepare(struct sbuf *s);
86 sysctl_hw_sndverbose(SYSCTL_HANDLER_ARGS)
90 verbose = sndstat_verbose;
91 error = sysctl_handle_int(oidp, &verbose, sizeof(verbose), req);
92 if (error == 0 && req->newptr != NULL) {
93 lockmgr(&sndstat_lock, LK_EXCLUSIVE);
94 if (verbose < 0 || verbose > 3)
97 sndstat_verbose = verbose;
98 lockmgr(&sndstat_lock, LK_RELEASE);
102 SYSCTL_PROC(_hw_snd, OID_AUTO, verbose, CTLTYPE_INT | CTLFLAG_RW,
103 0, sizeof(int), sysctl_hw_sndverbose, "I", "");
106 sndstat_open(struct dev_open_args *ap)
110 lockmgr(&sndstat_lock, LK_EXCLUSIVE);
111 if (sndstat_isopen) {
112 lockmgr(&sndstat_lock, LK_RELEASE);
116 lockmgr(&sndstat_lock, LK_RELEASE);
117 if (sbuf_new(&sndstat_sbuf, NULL, 4096, 0) == NULL) {
122 error = (sndstat_prepare(&sndstat_sbuf) > 0) ? 0 : ENOMEM;
125 lockmgr(&sndstat_lock, LK_EXCLUSIVE);
127 lockmgr(&sndstat_lock, LK_RELEASE);
133 sndstat_close(struct dev_close_args *ap)
135 lockmgr(&sndstat_lock, LK_EXCLUSIVE);
136 if (!sndstat_isopen) {
137 lockmgr(&sndstat_lock, LK_RELEASE);
140 sbuf_delete(&sndstat_sbuf);
143 lockmgr(&sndstat_lock, LK_RELEASE);
148 sndstat_read(struct dev_read_args *ap)
150 struct uio *buf = ap->a_uio;
153 lockmgr(&sndstat_lock, LK_EXCLUSIVE);
154 if (!sndstat_isopen) {
155 lockmgr(&sndstat_lock, LK_RELEASE);
158 l = min(buf->uio_resid, sbuf_len(&sndstat_sbuf) - sndstat_bufptr);
159 err = (l > 0)? uiomove(sbuf_data(&sndstat_sbuf) + sndstat_bufptr, l, buf) : 0;
162 lockmgr(&sndstat_lock, LK_RELEASE);
166 /************************************************************************/
168 static struct sndstat_entry *
169 sndstat_find(int type, int unit)
171 struct sndstat_entry *ent;
173 SLIST_FOREACH(ent, &sndstat_devlist, link) {
174 if (ent->type == type && ent->unit == unit)
182 sndstat_acquire(void)
184 lockmgr(&sndstat_lock, LK_EXCLUSIVE);
185 if (sndstat_isopen) {
186 lockmgr(&sndstat_lock, LK_RELEASE);
190 lockmgr(&sndstat_lock, LK_RELEASE);
195 sndstat_release(void)
197 lockmgr(&sndstat_lock, LK_EXCLUSIVE);
198 if (!sndstat_isopen) {
199 lockmgr(&sndstat_lock, LK_RELEASE);
203 lockmgr(&sndstat_lock, LK_RELEASE);
208 sndstat_register(device_t dev, char *str, sndstat_handler handler)
210 struct sndstat_entry *ent;
215 unit = device_get_unit(dev);
216 devtype = device_get_name(dev);
217 if (!strcmp(devtype, "pcm"))
219 else if (!strcmp(devtype, "midi"))
221 else if (!strcmp(devtype, "sequencer"))
222 type = SS_TYPE_SEQUENCER;
226 type = SS_TYPE_MODULE;
230 ent = kmalloc(sizeof *ent, M_DEVBUF, M_ZERO | M_WAITOK);
236 ent->handler = handler;
238 lockmgr(&sndstat_lock, LK_EXCLUSIVE);
239 SLIST_INSERT_HEAD(&sndstat_devlist, ent, link);
240 if (type == SS_TYPE_MODULE)
242 sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit;
243 lockmgr(&sndstat_lock, LK_RELEASE);
249 sndstat_registerfile(char *str)
251 return sndstat_register(NULL, str, NULL);
255 sndstat_unregister(device_t dev)
257 struct sndstat_entry *ent;
259 lockmgr(&sndstat_lock, LK_EXCLUSIVE);
260 SLIST_FOREACH(ent, &sndstat_devlist, link) {
261 if (ent->dev == dev) {
262 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
263 lockmgr(&sndstat_lock, LK_RELEASE);
264 kfree(ent, M_DEVBUF);
269 lockmgr(&sndstat_lock, LK_RELEASE);
275 sndstat_unregisterfile(char *str)
277 struct sndstat_entry *ent;
279 lockmgr(&sndstat_lock, LK_EXCLUSIVE);
280 SLIST_FOREACH(ent, &sndstat_devlist, link) {
281 if (ent->dev == NULL && ent->str == str) {
282 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
284 lockmgr(&sndstat_lock, LK_RELEASE);
285 kfree(ent, M_DEVBUF);
290 lockmgr(&sndstat_lock, LK_RELEASE);
295 /************************************************************************/
298 sndstat_prepare(struct sbuf *s)
300 struct sndstat_entry *ent;
303 sbuf_printf(s, "FreeBSD Audio Driver (newpcm)\n");
304 if (SLIST_EMPTY(&sndstat_devlist)) {
305 sbuf_printf(s, "No devices installed.\n");
310 sbuf_printf(s, "Installed devices:\n");
312 for (i = 0; i <= sndstat_maxunit; i++) {
313 for (j = SS_TYPE_FIRST; j <= SS_TYPE_LAST; j++) {
314 ent = sndstat_find(j, i);
317 sbuf_printf(s, "%s:", device_get_nameunit(ent->dev));
318 sbuf_printf(s, " <%s>", device_get_desc(ent->dev));
319 sbuf_printf(s, " %s", ent->str);
321 ent->handler(s, ent->dev, sndstat_verbose);
323 sbuf_printf(s, " [no handler]");
324 sbuf_printf(s, "\n");
328 if (sndstat_verbose >= 3 && sndstat_files > 0) {
329 sbuf_printf(s, "\nFile Versions:\n");
331 SLIST_FOREACH(ent, &sndstat_devlist, link) {
332 if (ent->dev == NULL && ent->str != NULL)
333 sbuf_printf(s, "%s\n", ent->str);
344 lockinit(&sndstat_lock, "sndstat", 0, 0);
345 if (make_dev(&sndstat_cdevsw, SND_DEV_STATUS,
346 UID_ROOT, GID_WHEEL, 0444, "sndstat") == NULL)
348 dev_ops_add(&sndstat_cdevsw, -1, SND_DEV_STATUS);
356 lockmgr(&sndstat_lock, LK_EXCLUSIVE);
357 if (sndstat_isopen) {
358 lockmgr(&sndstat_lock, LK_RELEASE);
362 dev_ops_remove(&sndstat_cdevsw, -1, SND_DEV_STATUS);
364 lockmgr(&sndstat_lock, LK_RELEASE);
369 sndstat_sysinit(void *p)
375 sndstat_sysuninit(void *p)
379 error = sndstat_uninit();
380 KASSERT(error == 0, ("%s: error = %d", __func__, error));
383 SYSINIT(sndstat_sysinit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysinit, NULL);
384 SYSUNINIT(sndstat_sysuninit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysuninit, NULL);