1 /*-
2 * Copyright (c) 2001 Cameron Grant <cg@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 */
26
27 #include <dev/sound/pcm/sound.h>
28 #include <dev/sound/pcm/vchan.h>
29 #ifdef USING_MUTEX
30 #include <sys/sx.h>
31 #endif
32
33 SND_DECLARE_FILE("$FreeBSD: releng/5.4/sys/dev/sound/pcm/sndstat.c 141016 2005-01-30 01:00:13Z imp $");
34
35 #define SS_TYPE_MODULE 0
36 #define SS_TYPE_FIRST 1
37 #define SS_TYPE_PCM 1
38 #define SS_TYPE_MIDI 2
39 #define SS_TYPE_SEQUENCER 3
40 #define SS_TYPE_LAST 3
41
42 static d_open_t sndstat_open;
43 static d_close_t sndstat_close;
44 static d_read_t sndstat_read;
45
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,
52 .d_name = "sndstat",
53 .d_maj = SND_CDEV_MAJOR,
54 };
55
56 struct sndstat_entry {
57 SLIST_ENTRY(sndstat_entry) link;
58 device_t dev;
59 char *str;
60 sndstat_handler handler;
61 int type, unit;
62 };
63
64 #ifdef USING_MUTEX
65 static struct sx sndstat_lock;
66 #endif
67 static struct sbuf sndstat_sbuf;
68 static struct cdev *sndstat_dev = 0;
69 static int sndstat_isopen = 0;
70 static int sndstat_bufptr;
71 static int sndstat_maxunit = -1;
72 static int sndstat_files = 0;
73
74 static SLIST_HEAD(, sndstat_entry) sndstat_devlist = SLIST_HEAD_INITIALIZER(none);
75
76 static int sndstat_verbose = 1;
77 #ifdef USING_MUTEX
78 TUNABLE_INT("hw.snd.verbose", &sndstat_verbose);
79 #else
80 TUNABLE_INT_DECL("hw.snd.verbose", 1, sndstat_verbose);
81 #endif
82
83 static int sndstat_prepare(struct sbuf *s);
84
85 static int
86 sysctl_hw_sndverbose(SYSCTL_HANDLER_ARGS)
87 {
88 intrmask_t s;
89 int error, verbose;
90
91 verbose = sndstat_verbose;
92 error = sysctl_handle_int(oidp, &verbose, sizeof(verbose), req);
93 if (error == 0 && req->newptr != NULL) {
94 s = spltty();
95 sx_xlock(&sndstat_lock);
96 if (verbose < 0 || verbose > 3)
97 error = EINVAL;
98 else
99 sndstat_verbose = verbose;
100 sx_xunlock(&sndstat_lock);
101 splx(s);
102 }
103 return error;
104 }
105 SYSCTL_PROC(_hw_snd, OID_AUTO, verbose, CTLTYPE_INT | CTLFLAG_RW,
106 0, sizeof(int), sysctl_hw_sndverbose, "I", "");
107
108 static int
109 sndstat_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
110 {
111 intrmask_t s;
112 int error;
113
114 s = spltty();
115 sx_xlock(&sndstat_lock);
116 if (sndstat_isopen) {
117 sx_xunlock(&sndstat_lock);
118 splx(s);
119 return EBUSY;
120 }
121 sndstat_isopen = 1;
122 sx_xunlock(&sndstat_lock);
123 splx(s);
124 if (sbuf_new(&sndstat_sbuf, NULL, 4096, 0) == NULL) {
125 error = ENXIO;
126 goto out;
127 }
128 sndstat_bufptr = 0;
129 error = (sndstat_prepare(&sndstat_sbuf) > 0) ? 0 : ENOMEM;
130 out:
131 if (error) {
132 s = spltty();
133 sx_xlock(&sndstat_lock);
134 sndstat_isopen = 0;
135 sx_xunlock(&sndstat_lock);
136 splx(s);
137 }
138 return (error);
139 }
140
141 static int
142 sndstat_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
143 {
144 intrmask_t s;
145
146 s = spltty();
147 sx_xlock(&sndstat_lock);
148 if (!sndstat_isopen) {
149 sx_xunlock(&sndstat_lock);
150 splx(s);
151 return EBADF;
152 }
153 sbuf_delete(&sndstat_sbuf);
154 sndstat_isopen = 0;
155
156 sx_xunlock(&sndstat_lock);
157 splx(s);
158 return 0;
159 }
160
161 static int
162 sndstat_read(struct cdev *i_dev, struct uio *buf, int flag)
163 {
164 intrmask_t s;
165 int l, err;
166
167 s = spltty();
168 sx_xlock(&sndstat_lock);
169 if (!sndstat_isopen) {
170 sx_xunlock(&sndstat_lock);
171 splx(s);
172 return EBADF;
173 }
174 l = min(buf->uio_resid, sbuf_len(&sndstat_sbuf) - sndstat_bufptr);
175 err = (l > 0)? uiomove(sbuf_data(&sndstat_sbuf) + sndstat_bufptr, l, buf) : 0;
176 sndstat_bufptr += l;
177
178 sx_xunlock(&sndstat_lock);
179 splx(s);
180 return err;
181 }
182
183 /************************************************************************/
184
185 static struct sndstat_entry *
186 sndstat_find(int type, int unit)
187 {
188 struct sndstat_entry *ent;
189
190 SLIST_FOREACH(ent, &sndstat_devlist, link) {
191 if (ent->type == type && ent->unit == unit)
192 return ent;
193 }
194
195 return NULL;
196 }
197
198 int
199 sndstat_register(device_t dev, char *str, sndstat_handler handler)
200 {
201 intrmask_t s;
202 struct sndstat_entry *ent;
203 const char *devtype;
204 int type, unit;
205
206 if (dev) {
207 unit = device_get_unit(dev);
208 devtype = device_get_name(dev);
209 if (!strcmp(devtype, "pcm"))
210 type = SS_TYPE_PCM;
211 else if (!strcmp(devtype, "midi"))
212 type = SS_TYPE_MIDI;
213 else if (!strcmp(devtype, "sequencer"))
214 type = SS_TYPE_SEQUENCER;
215 else
216 return EINVAL;
217 } else {
218 type = SS_TYPE_MODULE;
219 unit = -1;
220 }
221
222 ent = malloc(sizeof *ent, M_DEVBUF, M_ZERO | M_WAITOK);
223 if (!ent)
224 return ENOSPC;
225
226 ent->dev = dev;
227 ent->str = str;
228 ent->type = type;
229 ent->unit = unit;
230 ent->handler = handler;
231
232 s = spltty();
233 sx_xlock(&sndstat_lock);
234 SLIST_INSERT_HEAD(&sndstat_devlist, ent, link);
235 if (type == SS_TYPE_MODULE)
236 sndstat_files++;
237 sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit;
238 sx_xunlock(&sndstat_lock);
239 splx(s);
240
241 return 0;
242 }
243
244 int
245 sndstat_registerfile(char *str)
246 {
247 return sndstat_register(NULL, str, NULL);
248 }
249
250 int
251 sndstat_unregister(device_t dev)
252 {
253 intrmask_t s;
254 struct sndstat_entry *ent;
255
256 s = spltty();
257 sx_xlock(&sndstat_lock);
258 SLIST_FOREACH(ent, &sndstat_devlist, link) {
259 if (ent->dev == dev) {
260 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
261 sx_xunlock(&sndstat_lock);
262 splx(s);
263 free(ent, M_DEVBUF);
264
265 return 0;
266 }
267 }
268 sx_xunlock(&sndstat_lock);
269 splx(s);
270
271 return ENXIO;
272 }
273
274 int
275 sndstat_unregisterfile(char *str)
276 {
277 intrmask_t s;
278 struct sndstat_entry *ent;
279
280 s = spltty();
281 sx_xlock(&sndstat_lock);
282 SLIST_FOREACH(ent, &sndstat_devlist, link) {
283 if (ent->dev == NULL && ent->str == str) {
284 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link);
285 sndstat_files--;
286 sx_xunlock(&sndstat_lock);
287 splx(s);
288 free(ent, M_DEVBUF);
289
290 return 0;
291 }
292 }
293 sx_xunlock(&sndstat_lock);
294 splx(s);
295
296 return ENXIO;
297 }
298
299 /************************************************************************/
300
301 static int
302 sndstat_prepare(struct sbuf *s)
303 {
304 struct sndstat_entry *ent;
305 int i, j;
306
307 sbuf_printf(s, "FreeBSD Audio Driver (newpcm)\n");
308 if (SLIST_EMPTY(&sndstat_devlist)) {
309 sbuf_printf(s, "No devices installed.\n");
310 sbuf_finish(s);
311 return sbuf_len(s);
312 }
313
314 sbuf_printf(s, "Installed devices:\n");
315
316 for (i = 0; i <= sndstat_maxunit; i++) {
317 for (j = SS_TYPE_FIRST; j <= SS_TYPE_LAST; j++) {
318 ent = sndstat_find(j, i);
319 if (!ent)
320 continue;
321 sbuf_printf(s, "%s:", device_get_nameunit(ent->dev));
322 sbuf_printf(s, " <%s>", device_get_desc(ent->dev));
323 sbuf_printf(s, " %s", ent->str);
324 if (ent->handler)
325 ent->handler(s, ent->dev, sndstat_verbose);
326 else
327 sbuf_printf(s, " [no handler]");
328 sbuf_printf(s, "\n");
329 }
330 }
331
332 if (sndstat_verbose >= 3 && sndstat_files > 0) {
333 sbuf_printf(s, "\nFile Versions:\n");
334
335 SLIST_FOREACH(ent, &sndstat_devlist, link) {
336 if (ent->dev == NULL && ent->str != NULL)
337 sbuf_printf(s, "%s\n", ent->str);
338 }
339 }
340
341 sbuf_finish(s);
342 return sbuf_len(s);
343 }
344
345 static int
346 sndstat_init(void)
347 {
348 sx_init(&sndstat_lock, "sndstat");
349 sndstat_dev = make_dev(&sndstat_cdevsw, SND_DEV_STATUS, UID_ROOT, GID_WHEEL, 0444, "sndstat");
350
351 return (sndstat_dev != 0)? 0 : ENXIO;
352 }
353
354 static int
355 sndstat_uninit(void)
356 {
357 intrmask_t s;
358
359 s = spltty();
360 sx_xlock(&sndstat_lock);
361 if (sndstat_isopen) {
362 sx_xunlock(&sndstat_lock);
363 splx(s);
364 return EBUSY;
365 }
366
367 if (sndstat_dev)
368 destroy_dev(sndstat_dev);
369 sndstat_dev = 0;
370
371 splx(s);
372 sx_destroy(&sndstat_lock);
373 return 0;
374 }
375
376 int
377 sndstat_busy(void)
378 {
379 return (sndstat_isopen);
380 }
381
382 static void
383 sndstat_sysinit(void *p)
384 {
385 sndstat_init();
386 }
387
388 static void
389 sndstat_sysuninit(void *p)
390 {
391 sndstat_uninit();
392 }
393
394 SYSINIT(sndstat_sysinit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysinit, NULL);
395 SYSUNINIT(sndstat_sysuninit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysuninit, NULL);
396
397
Cache object: 1f8690aa85cadb181e767d48bad63617
|