1 /* 2 * Copyright (c) 2001 Cameron Grant <gandalf@vilnya.demon.co.uk> 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 * $FreeBSD: src/sys/dev/sound/pcm/sndstat.c,v 1.4.2.2 2002/04/22 15:49:36 cg Exp $ 27 * $DragonFly: src/sys/dev/sound/pcm/sndstat.c,v 1.7 2004/05/21 01:14:27 dillon Exp $ 28 */ 29 30 #include <dev/sound/pcm/sound.h> 31 #include <dev/sound/pcm/vchan.h> 32 33 SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pcm/sndstat.c,v 1.7 2004/05/21 01:14:27 dillon Exp $"); 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 /* name */ "sndstat", 48 /* maj */ SND_CDEV_MAJOR, 49 /* flags */ 0, 50 /* port */ NULL, 51 /* clone */ NULL, 52 53 /* open */ sndstat_open, 54 /* close */ sndstat_close, 55 /* read */ sndstat_read, 56 /* write */ nowrite, 57 /* ioctl */ noioctl, 58 /* poll */ nopoll, 59 /* mmap */ nommap, 60 /* strategy */ nostrategy, 61 /* dump */ nodump, 62 /* psize */ nopsize 63 }; 64 65 struct sndstat_entry { 66 SLIST_ENTRY(sndstat_entry) link; 67 device_t dev; 68 char *str; 69 sndstat_handler handler; 70 int type, unit; 71 }; 72 73 static struct sbuf sndstat_sbuf; 74 static int sndstat_isopen = 0; 75 static int sndstat_bufptr; 76 static int sndstat_maxunit = -1; 77 static int sndstat_files = 0; 78 79 static SLIST_HEAD(, sndstat_entry) sndstat_devlist = SLIST_HEAD_INITIALIZER(none); 80 81 static int sndstat_verbose = 1; 82 #ifdef USING_MUTEX 83 TUNABLE_INT("hw.snd.verbose", &sndstat_verbose); 84 #else 85 TUNABLE_INT_DECL("hw.snd.verbose", 1, sndstat_verbose); 86 #endif 87 88 static int sndstat_prepare(struct sbuf *s); 89 90 static int 91 sysctl_hw_sndverbose(SYSCTL_HANDLER_ARGS) 92 { 93 intrmask_t s; 94 int error, verbose; 95 96 verbose = sndstat_verbose; 97 error = sysctl_handle_int(oidp, &verbose, sizeof(verbose), req); 98 if (error == 0 && req->newptr != NULL) { 99 s = spltty(); 100 if (verbose < 0 || verbose > 3) 101 error = EINVAL; 102 else 103 sndstat_verbose = verbose; 104 splx(s); 105 } 106 return error; 107 } 108 SYSCTL_PROC(_hw_snd, OID_AUTO, verbose, CTLTYPE_INT | CTLFLAG_RW, 109 0, sizeof(int), sysctl_hw_sndverbose, "I", ""); 110 111 static int 112 sndstat_open(dev_t i_dev, int flags, int mode, struct thread *td) 113 { 114 intrmask_t s; 115 int err; 116 117 s = spltty(); 118 if (sndstat_isopen) { 119 splx(s); 120 return EBUSY; 121 } 122 if (sbuf_new(&sndstat_sbuf, NULL, 4096, 0) == NULL) { 123 splx(s); 124 return ENXIO; 125 } 126 sndstat_bufptr = 0; 127 err = (sndstat_prepare(&sndstat_sbuf) > 0)? 0 : ENOMEM; 128 if (!err) 129 sndstat_isopen = 1; 130 131 splx(s); 132 return err; 133 } 134 135 static int 136 sndstat_close(dev_t i_dev, int flags, int mode, struct thread *td) 137 { 138 intrmask_t s; 139 140 s = spltty(); 141 if (!sndstat_isopen) { 142 splx(s); 143 return EBADF; 144 } 145 sbuf_delete(&sndstat_sbuf); 146 sndstat_isopen = 0; 147 148 splx(s); 149 return 0; 150 } 151 152 static int 153 sndstat_read(dev_t i_dev, struct uio *buf, int flag) 154 { 155 intrmask_t s; 156 int l, err; 157 158 s = spltty(); 159 if (!sndstat_isopen) { 160 splx(s); 161 return EBADF; 162 } 163 l = min(buf->uio_resid, sbuf_len(&sndstat_sbuf) - sndstat_bufptr); 164 err = (l > 0)? uiomove(sbuf_data(&sndstat_sbuf) + sndstat_bufptr, l, buf) : 0; 165 sndstat_bufptr += l; 166 167 splx(s); 168 return err; 169 } 170 171 /************************************************************************/ 172 173 static struct sndstat_entry * 174 sndstat_find(int type, int unit) 175 { 176 struct sndstat_entry *ent; 177 178 SLIST_FOREACH(ent, &sndstat_devlist, link) { 179 if (ent->type == type && ent->unit == unit) 180 return ent; 181 } 182 183 return NULL; 184 } 185 186 int 187 sndstat_register(device_t dev, char *str, sndstat_handler handler) 188 { 189 intrmask_t s; 190 struct sndstat_entry *ent; 191 const char *devtype; 192 int type, unit; 193 194 if (dev) { 195 unit = device_get_unit(dev); 196 devtype = device_get_name(dev); 197 if (!strcmp(devtype, "pcm")) 198 type = SS_TYPE_PCM; 199 else if (!strcmp(devtype, "midi")) 200 type = SS_TYPE_MIDI; 201 else if (!strcmp(devtype, "sequencer")) 202 type = SS_TYPE_SEQUENCER; 203 else 204 return EINVAL; 205 } else { 206 type = SS_TYPE_MODULE; 207 unit = -1; 208 } 209 210 ent = malloc(sizeof *ent, M_DEVBUF, M_ZERO | M_WAITOK); 211 if (!ent) 212 return ENOSPC; 213 214 ent->dev = dev; 215 ent->str = str; 216 ent->type = type; 217 ent->unit = unit; 218 ent->handler = handler; 219 220 s = spltty(); 221 SLIST_INSERT_HEAD(&sndstat_devlist, ent, link); 222 if (type == SS_TYPE_MODULE) 223 sndstat_files++; 224 sndstat_maxunit = (unit > sndstat_maxunit)? unit : sndstat_maxunit; 225 splx(s); 226 227 return 0; 228 } 229 230 int 231 sndstat_registerfile(char *str) 232 { 233 return sndstat_register(NULL, str, NULL); 234 } 235 236 int 237 sndstat_unregister(device_t dev) 238 { 239 intrmask_t s; 240 struct sndstat_entry *ent; 241 242 s = spltty(); 243 SLIST_FOREACH(ent, &sndstat_devlist, link) { 244 if (ent->dev == dev) { 245 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link); 246 free(ent, M_DEVBUF); 247 splx(s); 248 249 return 0; 250 } 251 } 252 splx(s); 253 254 return ENXIO; 255 } 256 257 int 258 sndstat_unregisterfile(char *str) 259 { 260 intrmask_t s; 261 struct sndstat_entry *ent; 262 263 s = spltty(); 264 SLIST_FOREACH(ent, &sndstat_devlist, link) { 265 if (ent->dev == NULL && ent->str == str) { 266 SLIST_REMOVE(&sndstat_devlist, ent, sndstat_entry, link); 267 free(ent, M_DEVBUF); 268 sndstat_files--; 269 splx(s); 270 271 return 0; 272 } 273 } 274 splx(s); 275 276 return ENXIO; 277 } 278 279 /************************************************************************/ 280 281 static int 282 sndstat_prepare(struct sbuf *s) 283 { 284 struct sndstat_entry *ent; 285 int i, j; 286 287 sbuf_printf(s, "FreeBSD Audio Driver (newpcm)\n"); 288 if (SLIST_EMPTY(&sndstat_devlist)) { 289 sbuf_printf(s, "No devices installed.\n"); 290 sbuf_finish(s); 291 return sbuf_len(s); 292 } 293 294 sbuf_printf(s, "Installed devices:\n"); 295 296 for (i = 0; i <= sndstat_maxunit; i++) { 297 for (j = SS_TYPE_FIRST; j <= SS_TYPE_LAST; j++) { 298 ent = sndstat_find(j, i); 299 if (!ent) 300 continue; 301 sbuf_printf(s, "%s:", device_get_nameunit(ent->dev)); 302 sbuf_printf(s, " <%s>", device_get_desc(ent->dev)); 303 sbuf_printf(s, " %s", ent->str); 304 if (ent->handler) 305 ent->handler(s, ent->dev, sndstat_verbose); 306 else 307 sbuf_printf(s, " [no handler]"); 308 sbuf_printf(s, "\n"); 309 } 310 } 311 312 if (sndstat_verbose >= 3 && sndstat_files > 0) { 313 sbuf_printf(s, "\nFile Versions:\n"); 314 315 SLIST_FOREACH(ent, &sndstat_devlist, link) { 316 if (ent->dev == NULL && ent->str != NULL) 317 sbuf_printf(s, "%s\n", ent->str); 318 } 319 } 320 321 sbuf_finish(s); 322 return sbuf_len(s); 323 } 324 325 static int 326 sndstat_init(void) 327 { 328 cdevsw_add(&sndstat_cdevsw, -1, SND_DEV_STATUS); 329 make_dev(&sndstat_cdevsw, SND_DEV_STATUS, 330 UID_ROOT, GID_WHEEL, 0444, "sndstat"); 331 return (0); 332 } 333 334 static int 335 sndstat_uninit(void) 336 { 337 intrmask_t s; 338 339 s = spltty(); 340 if (sndstat_isopen) { 341 splx(s); 342 return EBUSY; 343 } 344 cdevsw_remove(&sndstat_cdevsw, -1, SND_DEV_STATUS); 345 splx(s); 346 return 0; 347 } 348 349 int 350 sndstat_busy(void) 351 { 352 return (sndstat_isopen); 353 } 354 355 static void 356 sndstat_sysinit(void *p) 357 { 358 sndstat_init(); 359 } 360 361 static void 362 sndstat_sysuninit(void *p) 363 { 364 sndstat_uninit(); 365 } 366 367 SYSINIT(sndstat_sysinit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysinit, NULL); 368 SYSUNINIT(sndstat_sysuninit, SI_SUB_DRIVERS, SI_ORDER_FIRST, sndstat_sysuninit, NULL); 369 370 371