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("$FreeBSD$"); 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 }; 54 55 struct sndstat_entry { 56 SLIST_ENTRY(sndstat_entry) link; 57 device_t dev; 58 char *str; 59 sndstat_handler handler; 60 int type, unit; 61 }; 62 63 #ifdef USING_MUTEX 64 static struct mtx sndstat_lock; 65 #endif 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; 72 73 static SLIST_HEAD(, sndstat_entry) sndstat_devlist = SLIST_HEAD_INITIALIZER(none); 74 75 #ifdef SND_DEBUG 76 SYSCTL_INT(_hw_snd, OID_AUTO, sndstat_isopen, CTLFLAG_RW, 77 &sndstat_isopen, 1, "sndstat emergency exit"); 78 #endif 79 80 int snd_verbose = 1; 81 #ifdef USING_MUTEX 82 TUNABLE_INT("hw.snd.verbose", &snd_verbose); 83 #else 84 TUNABLE_INT_DECL("hw.snd.verbose", 1, snd_verbose); 85 #endif 86 87 static int sndstat_prepare(struct sbuf *s); 88 89 static int 90 sysctl_hw_sndverbose(SYSCTL_HANDLER_ARGS) 91 { 92 int error, verbose; 93 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) 99 error = EINVAL; 100 else 101 snd_verbose = verbose; 102 mtx_unlock(&sndstat_lock); 103 } 104 return error; 105 } 106 SYSCTL_PROC(_hw_snd, OID_AUTO, verbose, CTLTYPE_INT | CTLFLAG_RW, 107 0, sizeof(int), sysctl_hw_sndverbose, "I", "verbosity level"); 108 109 static int 110 sndstat_open(struct cdev *i_dev, int flags, int mode, struct thread *td) 111 { 112 int error; 113 114 mtx_lock(&sndstat_lock); 115 if (sndstat_isopen) { 116 mtx_unlock(&sndstat_lock); 117 return EBUSY; 118 } 119 sndstat_isopen = 1; 120 mtx_unlock(&sndstat_lock); 121 if (sbuf_new(&sndstat_sbuf, NULL, 4096, SBUF_AUTOEXTEND) == NULL) { 122 error = ENXIO; 123 goto out; 124 } 125 sndstat_bufptr = 0; 126 error = (sndstat_prepare(&sndstat_sbuf) > 0) ? 0 : ENOMEM; 127 out: 128 if (error) { 129 mtx_lock(&sndstat_lock); 130 sndstat_isopen = 0; 131 mtx_unlock(&sndstat_lock); 132 } 133 return (error); 134 } 135 136 static int 137 sndstat_close(struct cdev *i_dev, int flags, int mode, struct thread *td) 138 { 139 mtx_lock(&sndstat_lock); 140 if (!sndstat_isopen) { 141 mtx_unlock(&sndstat_lock); 142 return EBADF; 143 } 144 145 mtx_unlock(&sndstat_lock); 146 sbuf_delete(&sndstat_sbuf); 147 148 mtx_lock(&sndstat_lock); 149 sndstat_isopen = 0; 150 mtx_unlock(&sndstat_lock); 151 152 return 0; 153 } 154 155 static int 156 sndstat_read(struct cdev *i_dev, struct uio *buf, int flag) 157 { 158 int l, err; 159 160 mtx_lock(&sndstat_lock); 161 if (!sndstat_isopen) { 162 mtx_unlock(&sndstat_lock); 163 return EBADF; 164 } 165 mtx_unlock(&sndstat_lock); 166 167 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; 169 sndstat_bufptr += l; 170 171 return err; 172 } 173 174 /************************************************************************/ 175 176 static struct sndstat_entry * 177 sndstat_find(int type, int unit) 178 { 179 struct sndstat_entry *ent; 180 181 SLIST_FOREACH(ent, &sndstat_devlist, link) { 182 if (ent->type == type && ent->unit == unit) 183 return ent; 184 } 185 186 return NULL; 187 } 188 189 int 190 sndstat_acquire(void) 191 { 192 mtx_lock(&sndstat_lock); 193 if (sndstat_isopen) { 194 mtx_unlock(&sndstat_lock); 195 return EBUSY; 196 } 197 sndstat_isopen = 1; 198 mtx_unlock(&sndstat_lock); 199 return 0; 200 } 201 202 int 203 sndstat_release(void) 204 { 205 mtx_lock(&sndstat_lock); 206 if (!sndstat_isopen) { 207 mtx_unlock(&sndstat_lock); 208 return EBADF; 209 } 210 sndstat_isopen = 0; 211 mtx_unlock(&sndstat_lock); 212 return 0; 213 } 214 215 int 216 sndstat_register(device_t dev, char *str, sndstat_handler handler) 217 { 218 struct sndstat_entry *ent; 219 const char *devtype; 220 int type, unit; 221 222 if (dev) { 223 unit = device_get_unit(dev); 224 devtype = device_get_name(dev); 225 if (!strcmp(devtype, "pcm")) 226 type = SS_TYPE_PCM; 227 else if (!strcmp(devtype, "midi")) 228 type = SS_TYPE_MIDI; 229 else if (!strcmp(devtype, "sequencer")) 230 type = SS_TYPE_SEQUENCER; 231 else 232 return EINVAL; 233 } else { 234 type = SS_TYPE_MODULE; 235 unit = -1; 236 } 237 238 ent = malloc(sizeof *ent, M_DEVBUF, M_WAITOK | M_ZERO); 239 ent->dev = dev; 240 ent->str = str; 241 ent->type = type; 242 ent->unit = unit; 243 ent->handler = handler; 244 245 mtx_lock(&sndstat_lock); 246 SLIST_INSERT_HEAD(&sndstat_devlist, ent, link); 247 if (type == SS_TYPE_MODULE) 248 sndstat_files++; 249 sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit; 250 mtx_unlock(&sndstat_lock); 251 252 return 0; 253 } 254 255 int 256 sndstat_registerfile(char *str) 257 { 258 return sndstat_register(NULL, str, NULL); 259 } 260 261 int 262 sndstat_unregister(device_t dev) 263 { 264 struct sndstat_entry *ent; 265 266 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); 271 free(ent, M_DEVBUF); 272 273 return 0; 274 } 275 } 276 mtx_unlock(&sndstat_lock); 277 278 return ENXIO; 279 } 280 281 int 282 sndstat_unregisterfile(char *str) 283 { 284 struct sndstat_entry *ent; 285 286 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); 290 sndstat_files--; 291 mtx_unlock(&sndstat_lock); 292 free(ent, M_DEVBUF); 293 294 return 0; 295 } 296 } 297 mtx_unlock(&sndstat_lock); 298 299 return ENXIO; 300 } 301 302 /************************************************************************/ 303 304 static int 305 sndstat_prepare(struct sbuf *s) 306 { 307 struct sndstat_entry *ent; 308 int i, j; 309 310 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"); 314 sbuf_finish(s); 315 return sbuf_len(s); 316 } 317 318 sbuf_printf(s, "Installed devices:\n"); 319 320 for (i = 0; i <= sndstat_maxunit; i++) { 321 for (j = SS_TYPE_FIRST; j <= SS_TYPE_LAST; j++) { 322 ent = sndstat_find(j, i); 323 if (!ent) 324 continue; 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); 328 if (ent->handler) 329 ent->handler(s, ent->dev, snd_verbose); 330 else 331 sbuf_printf(s, " [no handler]"); 332 sbuf_printf(s, "\n"); 333 } 334 } 335 336 if (snd_verbose >= 3 && sndstat_files > 0) { 337 sbuf_printf(s, "\nFile Versions:\n"); 338 339 SLIST_FOREACH(ent, &sndstat_devlist, link) { 340 if (ent->dev == NULL && ent->str != NULL) 341 sbuf_printf(s, "%s\n", ent->str); 342 } 343 } 344 345 sbuf_finish(s); 346 return sbuf_len(s); 347 } 348 349 static int 350 sndstat_init(void) 351 { 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"); 354 355 return (sndstat_dev != 0)? 0 : ENXIO; 356 } 357 358 static int 359 sndstat_uninit(void) 360 { 361 mtx_lock(&sndstat_lock); 362 if (sndstat_isopen) { 363 mtx_unlock(&sndstat_lock); 364 return EBUSY; 365 } 366 367 sndstat_isopen = 1; 368 mtx_unlock(&sndstat_lock); 369 370 if (sndstat_dev) 371 destroy_dev(sndstat_dev); 372 sndstat_dev = 0; 373 374 mtx_destroy(&sndstat_lock); 375 return 0; 376 } 377 378 static void 379 sndstat_sysinit(void *p) 380 { 381 sndstat_init(); 382 } 383 384 static void 385 sndstat_sysuninit(void *p) 386 { 387 int error; 388 389 error = sndstat_uninit(); 390 KASSERT(error == 0, ("%s: error = %d", __func__, error)); 391 } 392 393 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); 395 396 397