sndstat.c revision 111815
10SN/A/* 22362SN/A * Copyright (c) 2001 Cameron Grant <gandalf@vilnya.demon.co.uk> 30SN/A * All rights reserved. 40SN/A * 50SN/A * Redistribution and use in source and binary forms, with or without 60SN/A * modification, are permitted provided that the following conditions 72362SN/A * are met: 80SN/A * 1. Redistributions of source code must retain the above copyright 92362SN/A * notice, this list of conditions and the following disclaimer. 100SN/A * 2. Redistributions in binary form must reproduce the above copyright 110SN/A * notice, this list of conditions and the following disclaimer in the 120SN/A * documentation and/or other materials provided with the distribution. 130SN/A * 140SN/A * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 150SN/A * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 160SN/A * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 170SN/A * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 180SN/A * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 190SN/A * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 200SN/A * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 212362SN/A * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 222362SN/A * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 232362SN/A * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 240SN/A * SUCH DAMAGE. 250SN/A */ 260SN/A 270SN/A#include <dev/sound/pcm/sound.h> 280SN/A#include <dev/sound/pcm/vchan.h> 290SN/A 300SN/ASND_DECLARE_FILE("$FreeBSD: head/sys/dev/sound/pcm/sndstat.c 111815 2003-03-03 12:15:54Z phk $"); 310SN/A 320SN/A#define SS_TYPE_MODULE 0 330SN/A#define SS_TYPE_FIRST 1 340SN/A#define SS_TYPE_PCM 1 350SN/A#define SS_TYPE_MIDI 2 360SN/A#define SS_TYPE_SEQUENCER 3 370SN/A#define SS_TYPE_LAST 3 380SN/A 390SN/Astatic d_open_t sndstat_open; 400SN/Astatic d_close_t sndstat_close; 410SN/Astatic d_read_t sndstat_read; 420SN/A 430SN/Astatic struct cdevsw sndstat_cdevsw = { 440SN/A .d_open = sndstat_open, 450SN/A .d_close = sndstat_close, 460SN/A .d_read = sndstat_read, 470SN/A .d_name = "sndstat", 480SN/A .d_maj = SND_CDEV_MAJOR, 490SN/A}; 500SN/A 510SN/Astruct sndstat_entry { 520SN/A SLIST_ENTRY(sndstat_entry) link; 530SN/A device_t dev; 540SN/A char *str; 550SN/A sndstat_handler handler; 560SN/A int type, unit; 570SN/A}; 580SN/A 590SN/A#ifdef USING_MUTEX 600SN/Astatic struct mtx sndstat_lock; 610SN/A#endif 620SN/Astatic struct sbuf sndstat_sbuf; 630SN/Astatic dev_t sndstat_dev = 0; 640SN/Astatic int sndstat_isopen = 0; 650SN/Astatic int sndstat_bufptr; 660SN/Astatic int sndstat_maxunit = -1; 670SN/Astatic int sndstat_files = 0; 680SN/A 690SN/Astatic SLIST_HEAD(, sndstat_entry) sndstat_devlist = SLIST_HEAD_INITIALIZER(none); 700SN/A 710SN/Astatic int sndstat_verbose = 1; 720SN/A#ifdef USING_MUTEX 730SN/ATUNABLE_INT("hw.snd.verbose", &sndstat_verbose); 740SN/A#else 750SN/ATUNABLE_INT_DECL("hw.snd.verbose", 1, sndstat_verbose); 760SN/A#endif 770SN/A 780SN/Astatic int sndstat_prepare(struct sbuf *s); 790SN/A 800SN/Astatic int 810SN/Asysctl_hw_sndverbose(SYSCTL_HANDLER_ARGS) 820SN/A{ 830SN/A intrmask_t s; 840SN/A int error, verbose; 850SN/A 860SN/A verbose = sndstat_verbose; 870SN/A error = sysctl_handle_int(oidp, &verbose, sizeof(verbose), req); 880SN/A if (error == 0 && req->newptr != NULL) { 890SN/A s = spltty(); 900SN/A mtx_lock(&sndstat_lock); 910SN/A if (verbose < 0 || verbose > 3) 920SN/A error = EINVAL; 930SN/A else 940SN/A sndstat_verbose = verbose; 950SN/A mtx_unlock(&sndstat_lock); 960SN/A splx(s); 970SN/A } 980SN/A return error; 990SN/A} 1000SN/ASYSCTL_PROC(_hw_snd, OID_AUTO, verbose, CTLTYPE_INT | CTLFLAG_RW, 1010SN/A 0, sizeof(int), sysctl_hw_sndverbose, "I", ""); 1020SN/A 1030SN/Astatic int 1040SN/Asndstat_open(dev_t i_dev, int flags, int mode, struct thread *td) 1050SN/A{ 1060SN/A intrmask_t s; 1070SN/A int error; 1080SN/A 1090SN/A s = spltty(); 1100SN/A mtx_lock(&sndstat_lock); 1110SN/A if (sndstat_isopen) { 1120SN/A mtx_unlock(&sndstat_lock); 1130SN/A splx(s); 1140SN/A return EBUSY; 1150SN/A } 1160SN/A sndstat_isopen = 1; 1170SN/A mtx_unlock(&sndstat_lock); 1180SN/A splx(s); 1190SN/A if (sbuf_new(&sndstat_sbuf, NULL, 4096, 0) == NULL) { 1200SN/A error = ENXIO; 1210SN/A goto out; 1220SN/A } 1230SN/A sndstat_bufptr = 0; 1240SN/A error = (sndstat_prepare(&sndstat_sbuf) > 0) ? 0 : ENOMEM; 1250SN/Aout: 1260SN/A if (error) { 1270SN/A s = spltty(); 1280SN/A mtx_lock(&sndstat_lock); 1290SN/A sndstat_isopen = 0; 1300SN/A mtx_unlock(&sndstat_lock); 1310SN/A splx(s); 1320SN/A } 1330SN/A return (error); 1340SN/A} 1350SN/A 1360SN/Astatic int 1370SN/Asndstat_close(dev_t i_dev, int flags, int mode, struct thread *td) 1380SN/A{ 1390SN/A intrmask_t s; 1400SN/A 1410SN/A s = spltty(); 1420SN/A mtx_lock(&sndstat_lock); 1430SN/A if (!sndstat_isopen) { 1440SN/A mtx_unlock(&sndstat_lock); 1450SN/A splx(s); 1460SN/A return EBADF; 1470SN/A } 1480SN/A sbuf_delete(&sndstat_sbuf); 1490SN/A sndstat_isopen = 0; 1500SN/A 1510SN/A mtx_unlock(&sndstat_lock); 1520SN/A splx(s); 1530SN/A return 0; 1540SN/A} 1550SN/A 1560SN/Astatic int 1570SN/Asndstat_read(dev_t i_dev, struct uio *buf, int flag) 1580SN/A{ 1590SN/A intrmask_t s; 1600SN/A int l, err; 1610SN/A 1620SN/A s = spltty(); 1630SN/A mtx_lock(&sndstat_lock); 1640SN/A if (!sndstat_isopen) { 1650SN/A mtx_unlock(&sndstat_lock); 1660SN/A splx(s); 1670SN/A return EBADF; 1680SN/A } 169 l = min(buf->uio_resid, sbuf_len(&sndstat_sbuf) - sndstat_bufptr); 170 err = (l > 0)? uiomove(sbuf_data(&sndstat_sbuf) + sndstat_bufptr, l, buf) : 0; 171 sndstat_bufptr += l; 172 173 mtx_unlock(&sndstat_lock); 174 splx(s); 175 return err; 176} 177 178/************************************************************************/ 179 180static struct sndstat_entry * 181sndstat_find(int type, int unit) 182{ 183 struct sndstat_entry *ent; 184 185 SLIST_FOREACH(ent, &sndstat_devlist, link) { 186 if (ent->type == type && ent->unit == unit) 187 return ent; 188 } 189 190 return NULL; 191} 192 193int 194sndstat_register(device_t dev, char *str, sndstat_handler handler) 195{ 196 intrmask_t s; 197 struct sndstat_entry *ent; 198 const char *devtype; 199 int type, unit; 200 201 if (dev) { 202 unit = device_get_unit(dev); 203 devtype = device_get_name(dev); 204 if (!strcmp(devtype, "pcm")) 205 type = SS_TYPE_PCM; 206 else if (!strcmp(devtype, "midi")) 207 type = SS_TYPE_MIDI; 208 else if (!strcmp(devtype, "sequencer")) 209 type = SS_TYPE_SEQUENCER; 210 else 211 return EINVAL; 212 } else { 213 type = SS_TYPE_MODULE; 214 unit = -1; 215 } 216 217 ent = malloc(sizeof *ent, M_DEVBUF, M_ZERO | M_WAITOK); 218 if (!ent) 219 return ENOSPC; 220 221 ent->dev = dev; 222 ent->str = str; 223 ent->type = type; 224 ent->unit = unit; 225 ent->handler = handler; 226 227 s = spltty(); 228 mtx_lock(&sndstat_lock); 229 SLIST_INSERT_HEAD(&sndstat_devlist, ent, link); 230 if (type == SS_TYPE_MODULE) 231 sndstat_files++; 232 sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit; 233 mtx_unlock(&sndstat_lock); 234 splx(s); 235 236 return 0; 237} 238 239int 240sndstat_registerfile(char *str) 241{ 242 return sndstat_register(NULL, str, NULL); 243} 244 245int 246sndstat_unregister(device_t dev) 247{ 248 intrmask_t s; 249 struct sndstat_entry *ent; 250 251 s = spltty(); 252 mtx_lock(&sndstat_lock); 253 SLIST_FOREACH(ent, &sndstat_devlist, link) { 254 if (ent->dev == dev) { 255 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link); 256 mtx_unlock(&sndstat_lock); 257 splx(s); 258 free(ent, M_DEVBUF); 259 260 return 0; 261 } 262 } 263 mtx_unlock(&sndstat_lock); 264 splx(s); 265 266 return ENXIO; 267} 268 269int 270sndstat_unregisterfile(char *str) 271{ 272 intrmask_t s; 273 struct sndstat_entry *ent; 274 275 s = spltty(); 276 mtx_lock(&sndstat_lock); 277 SLIST_FOREACH(ent, &sndstat_devlist, link) { 278 if (ent->dev == NULL && ent->str == str) { 279 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link); 280 sndstat_files--; 281 mtx_unlock(&sndstat_lock); 282 splx(s); 283 free(ent, M_DEVBUF); 284 285 return 0; 286 } 287 } 288 mtx_unlock(&sndstat_lock); 289 splx(s); 290 291 return ENXIO; 292} 293 294/************************************************************************/ 295 296static int 297sndstat_prepare(struct sbuf *s) 298{ 299 struct sndstat_entry *ent; 300 int i, j; 301 302 sbuf_printf(s, "FreeBSD Audio Driver (newpcm)\n"); 303 if (SLIST_EMPTY(&sndstat_devlist)) { 304 sbuf_printf(s, "No devices installed.\n"); 305 sbuf_finish(s); 306 return sbuf_len(s); 307 } 308 309 sbuf_printf(s, "Installed devices:\n"); 310 311 for (i = 0; i <= sndstat_maxunit; i++) { 312 for (j = SS_TYPE_FIRST; j <= SS_TYPE_LAST; j++) { 313 ent = sndstat_find(j, i); 314 if (!ent) 315 continue; 316 sbuf_printf(s, "%s:", device_get_nameunit(ent->dev)); 317 sbuf_printf(s, " <%s>", device_get_desc(ent->dev)); 318 sbuf_printf(s, " %s", ent->str); 319 if (ent->handler) 320 ent->handler(s, ent->dev, sndstat_verbose); 321 else 322 sbuf_printf(s, " [no handler]"); 323 sbuf_printf(s, "\n"); 324 } 325 } 326 327 if (sndstat_verbose >= 3 && sndstat_files > 0) { 328 sbuf_printf(s, "\nFile Versions:\n"); 329 330 SLIST_FOREACH(ent, &sndstat_devlist, link) { 331 if (ent->dev == NULL && ent->str != NULL) 332 sbuf_printf(s, "%s\n", ent->str); 333 } 334 } 335 336 sbuf_finish(s); 337 return sbuf_len(s); 338} 339 340static int 341sndstat_init(void) 342{ 343 mtx_init(&sndstat_lock, "sndstat", NULL, 0); 344 sndstat_dev = make_dev(&sndstat_cdevsw, SND_DEV_STATUS, UID_ROOT, GID_WHEEL, 0444, "sndstat"); 345 346 return (sndstat_dev != 0)? 0 : ENXIO; 347} 348 349static int 350sndstat_uninit(void) 351{ 352 intrmask_t s; 353 354 s = spltty(); 355 mtx_lock(&sndstat_lock); 356 if (sndstat_isopen) { 357 mtx_unlock(&sndstat_lock); 358 splx(s); 359 return EBUSY; 360 } 361 362 if (sndstat_dev) 363 destroy_dev(sndstat_dev); 364 sndstat_dev = 0; 365 366 splx(s); 367 mtx_destroy(&sndstat_lock); 368 return 0; 369} 370 371int 372sndstat_busy(void) 373{ 374 return (sndstat_isopen); 375} 376 377static void 378sndstat_sysinit(void *p) 379{ 380 sndstat_init(); 381} 382 383static void 384sndstat_sysuninit(void *p) 385{ 386 sndstat_uninit(); 387} 388 389SYSINIT(sndstat_sysinit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysinit, NULL); 390SYSUNINIT(sndstat_sysuninit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysuninit, NULL); 391 392 393