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 .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); 396 397 398