1 /* 2 * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk> 3 * (C) 1997 Luigi Rizzo (luigi@iet.unipi.it) 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include <dev/sound/pcm/sound.h> 31 32 static int status_isopen = 0; 33 static int status_init(char *buf, int size); 34 static int status_read(struct uio *buf); 35 36 static d_open_t sndopen; 37 static d_close_t sndclose; 38 static d_ioctl_t sndioctl; 39 static d_read_t sndread; 40 static d_write_t sndwrite; 41 static d_mmap_t sndmmap; 42 static d_poll_t sndpoll; 43 44 #define CDEV_MAJOR 30 45 static struct cdevsw snd_cdevsw = { 46 /* open */ sndopen, 47 /* close */ sndclose, 48 /* read */ sndread, 49 /* write */ sndwrite, 50 /* ioctl */ sndioctl, 51 /* poll */ sndpoll, 52 /* mmap */ sndmmap, 53 /* strategy */ nostrategy, 54 /* name */ "snd", 55 /* maj */ CDEV_MAJOR, 56 /* dump */ nodump, 57 /* psize */ nopsize, 58 /* flags */ 0, 59 /* bmaj */ -1 60 }; 61 62 /* PROPOSAL: 63 each unit needs: 64 status, mixer, dsp, dspW, audio, sequencer, midi-in, seq2, sndproc = 9 devices 65 dspW and audio are deprecated. 66 dsp needs min 64 channels, will give it 256 67 68 minor = (unit << 12) + (dev << 8) + channel 69 currently minor = (channel << 8) + (unit << 4) + dev 70 71 nomenclature: 72 /dev/pcmX/dsp.(0..255) 73 /dev/pcmX/dspW 74 /dev/pcmX/audio 75 /dev/pcmX/status 76 /dev/pcmX/mixer 77 [etc.] 78 79 currently: 80 minor = (channel << 8) + (unit << 4) + dev 81 */ 82 83 #define PCMMINOR(x) (minor(x)) 84 #define PCMCHAN(x) ((PCMMINOR(x) & 0x0000ff00) >> 8) 85 #define PCMUNIT(x) ((PCMMINOR(x) & 0x000000f0) >> 4) 86 #define PCMDEV(x) (PCMMINOR(x) & 0x0000000f) 87 #define PCMMKMINOR(u, d, c) ((((c) & 0xff) << 8) | (((u) & 0x0f) << 4) | ((d) & 0x0f)) 88 89 static devclass_t pcm_devclass; 90 91 static snddev_info * 92 gsd(int unit) 93 { 94 return devclass_get_softc(pcm_devclass, unit); 95 } 96 97 int 98 pcm_addchan(device_t dev, int dir, pcm_channel *templ, void *devinfo) 99 { 100 int unit = device_get_unit(dev); 101 snddev_info *d = device_get_softc(dev); 102 pcm_channel *ch; 103 104 ch = (dir == PCMDIR_PLAY)? &d->play[d->playcount] : &d->rec[d->reccount]; 105 *ch = *templ; 106 if (chn_init(ch, devinfo, dir)) { 107 device_printf(dev, "chn_init() for %s:%d failed\n", 108 (dir == PCMDIR_PLAY)? "play" : "record", 109 (dir == PCMDIR_PLAY)? d->playcount : d->reccount); 110 return 1; 111 } 112 if (dir == PCMDIR_PLAY) d->playcount++; else d->reccount++; 113 make_dev(&snd_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP, d->chancount), 114 UID_ROOT, GID_WHEEL, 0666, "dsp%d.%d", unit, d->chancount); 115 make_dev(&snd_cdevsw, PCMMKMINOR(unit, SND_DEV_AUDIO, d->chancount), 116 UID_ROOT, GID_WHEEL, 0666, "audio%d.%d", unit, d->chancount); 117 make_dev(&snd_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP16, d->chancount), 118 UID_ROOT, GID_WHEEL, 0666, "dspW%d.%d", unit, d->chancount); 119 /* XXX SND_DEV_NORESET? */ 120 d->chancount++; 121 return 0; 122 } 123 124 int 125 pcm_setstatus(device_t dev, char *str) 126 { 127 snddev_info *d = device_get_softc(dev); 128 strncpy(d->status, str, SND_STATUSLEN); 129 return 0; 130 } 131 132 u_int32_t 133 pcm_getflags(device_t dev) 134 { 135 snddev_info *d = device_get_softc(dev); 136 return d->flags; 137 } 138 139 void 140 pcm_setflags(device_t dev, u_int32_t val) 141 { 142 snddev_info *d = device_get_softc(dev); 143 d->flags = val; 144 } 145 146 void * 147 pcm_getdevinfo(device_t dev) 148 { 149 snddev_info *d = device_get_softc(dev); 150 return d->devinfo; 151 } 152 153 void 154 pcm_setswap(device_t dev, pcm_swap_t *swap) 155 { 156 snddev_info *d = device_get_softc(dev); 157 d->swap = swap; 158 } 159 /* This is the generic init routine */ 160 int 161 pcm_register(device_t dev, void *devinfo, int numplay, int numrec) 162 { 163 int sz, unit = device_get_unit(dev); 164 snddev_info *d = device_get_softc(dev); 165 166 if (!pcm_devclass) { 167 pcm_devclass = device_get_devclass(dev); 168 make_dev(&snd_cdevsw, PCMMKMINOR(0, SND_DEV_STATUS, 0), 169 UID_ROOT, GID_WHEEL, 0444, "sndstat"); 170 } 171 make_dev(&snd_cdevsw, PCMMKMINOR(unit, SND_DEV_CTL, 0), 172 UID_ROOT, GID_WHEEL, 0666, "mixer%d", unit); 173 174 d->devinfo = devinfo; 175 d->chancount = d->playcount = d->reccount = 0; 176 sz = (numplay + numrec) * sizeof(pcm_channel *); 177 178 if (sz > 0) { 179 d->aplay = (pcm_channel **)malloc(sz, M_DEVBUF, M_NOWAIT); 180 if (!d->aplay) goto no; 181 bzero(d->aplay, sz); 182 183 d->arec = (pcm_channel **)malloc(sz, M_DEVBUF, M_NOWAIT); 184 if (!d->arec) goto no; 185 bzero(d->arec, sz); 186 187 sz = (numplay + numrec) * sizeof(int); 188 d->ref = (int *)malloc(sz, M_DEVBUF, M_NOWAIT); 189 if (!d->ref) goto no; 190 bzero(d->ref, sz); 191 } 192 193 if (numplay > 0) { 194 d->play = (pcm_channel *)malloc(numplay * sizeof(pcm_channel), 195 M_DEVBUF, M_NOWAIT); 196 if (!d->play) goto no; 197 bzero(d->play, numplay * sizeof(pcm_channel)); 198 } 199 200 if (numrec > 0) { 201 d->rec = (pcm_channel *)malloc(numrec * sizeof(pcm_channel), 202 M_DEVBUF, M_NOWAIT); 203 if (!d->rec) goto no; 204 bzero(d->rec, numrec * sizeof(pcm_channel)); 205 } 206 207 fkchan_setup(&d->fakechan); 208 chn_init(&d->fakechan, NULL, 0); 209 d->magic = MAGIC(unit); /* debugging... */ 210 d->swap = NULL; 211 212 return 0; 213 no: 214 if (d->aplay) free(d->aplay, M_DEVBUF); 215 if (d->play) free(d->play, M_DEVBUF); 216 if (d->arec) free(d->arec, M_DEVBUF); 217 if (d->rec) free(d->rec, M_DEVBUF); 218 return ENXIO; 219 } 220 221 /* 222 * a small utility function which, given a device number, returns 223 * a pointer to the associated snddev_info struct, and sets the unit 224 * number. 225 */ 226 static snddev_info * 227 get_snddev_info(dev_t i_dev, int *unit, int *dev, int *chan) 228 { 229 int u, d, c; 230 231 u = PCMUNIT(i_dev); 232 d = PCMDEV(i_dev); 233 c = PCMCHAN(i_dev); 234 if (u > devclass_get_maxunit(pcm_devclass)) u = -1; 235 if (unit) *unit = u; 236 if (dev) *dev = d; 237 if (chan) *chan = c; 238 if (u < 0) return NULL; 239 240 switch(d) { 241 case SND_DEV_CTL: /* /dev/mixer handled by pcm */ 242 case SND_DEV_STATUS: /* /dev/sndstat handled by pcm */ 243 case SND_DEV_DSP: 244 case SND_DEV_DSP16: 245 case SND_DEV_AUDIO: 246 return gsd(u); 247 248 case SND_DEV_SEQ: /* XXX when enabled... */ 249 case SND_DEV_SEQ2: 250 case SND_DEV_MIDIN: 251 case SND_DEV_SNDPROC: /* /dev/sndproc handled by pcm */ 252 default: 253 printf("unsupported subdevice %d\n", d); 254 return NULL; 255 } 256 } 257 258 static int 259 sndopen(dev_t i_dev, int flags, int mode, struct proc *p) 260 { 261 int dev, unit, chan; 262 snddev_info *d = get_snddev_info(i_dev, &unit, &dev, &chan); 263 264 DEB(printf("open snd%d subdev %d flags 0x%08x mode 0x%08x\n", 265 unit, dev, flags, mode)); 266 267 switch(dev) { 268 case SND_DEV_STATUS: 269 if (status_isopen) return EBUSY; 270 status_isopen = 1; 271 return 0; 272 273 case SND_DEV_CTL: 274 return d? 0 : ENXIO; 275 276 case SND_DEV_AUDIO: 277 case SND_DEV_DSP: 278 case SND_DEV_DSP16: 279 case SND_DEV_NORESET: 280 return d? dsp_open(d, chan, flags, dev) : ENXIO; 281 282 default: 283 return ENXIO; 284 } 285 } 286 287 static int 288 sndclose(dev_t i_dev, int flags, int mode, struct proc *p) 289 { 290 int dev, unit, chan; 291 snddev_info *d = get_snddev_info(i_dev, &unit, &dev, &chan); 292 293 DEB(printf("close snd%d subdev %d\n", unit, dev)); 294 295 switch(dev) { /* only those for which close makes sense */ 296 case SND_DEV_STATUS: 297 if (!status_isopen) return EBADF; 298 status_isopen = 0; 299 return 0; 300 301 case SND_DEV_CTL: 302 return d? 0 : ENXIO; 303 304 case SND_DEV_AUDIO: 305 case SND_DEV_DSP: 306 case SND_DEV_DSP16: 307 return d? dsp_close(d, chan, dev) : ENXIO; 308 309 default: 310 return ENXIO; 311 } 312 } 313 314 static int 315 sndread(dev_t i_dev, struct uio *buf, int flag) 316 { 317 int dev, unit, chan; 318 snddev_info *d = get_snddev_info(i_dev, &unit, &dev, &chan); 319 DEB(printf("read snd%d subdev %d flag 0x%08x\n", unit, dev, flag)); 320 321 switch(dev) { 322 case SND_DEV_STATUS: 323 return status_isopen? status_read(buf) : EBADF; 324 325 case SND_DEV_AUDIO: 326 case SND_DEV_DSP: 327 case SND_DEV_DSP16: 328 return d? dsp_read(d, chan, buf, flag) : EBADF; 329 330 default: 331 return ENXIO; 332 } 333 } 334 335 static int 336 sndwrite(dev_t i_dev, struct uio *buf, int flag) 337 { 338 int dev, unit, chan; 339 snddev_info *d = get_snddev_info(i_dev, &unit, &dev, &chan); 340 341 DEB(printf("write snd%d subdev %d flag 0x%08x\n", unit, dev & 0xf, flag)); 342 343 switch(dev) { /* only writeable devices */ 344 case SND_DEV_DSP: 345 case SND_DEV_DSP16: 346 case SND_DEV_AUDIO: 347 return d? dsp_write(d, chan, buf, flag) : EBADF; 348 349 default: 350 return EPERM; /* for non-writeable devices ; */ 351 } 352 } 353 354 static int 355 sndioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct proc * p) 356 { 357 int dev, chan; 358 snddev_info *d = get_snddev_info(i_dev, NULL, &dev, &chan); 359 360 if (d == NULL) return ENXIO; 361 362 switch(dev) { 363 case SND_DEV_CTL: 364 return mixer_ioctl(d, cmd, arg); 365 366 case SND_DEV_AUDIO: 367 case SND_DEV_DSP: 368 case SND_DEV_DSP16: 369 if (IOCGROUP(cmd) == 'M') 370 return mixer_ioctl(d, cmd, arg); 371 else 372 return dsp_ioctl(d, chan, cmd, arg); 373 374 default: 375 return ENXIO; 376 } 377 } 378 379 static int 380 sndpoll(dev_t i_dev, int events, struct proc *p) 381 { 382 int dev, chan; 383 snddev_info *d = get_snddev_info(i_dev, NULL, &dev, &chan); 384 385 DEB(printf("sndpoll d 0x%p dev 0x%04x events 0x%08x\n", d, dev, events)); 386 387 if (d == NULL) return ENXIO; 388 389 switch(dev) { 390 case SND_DEV_AUDIO: 391 case SND_DEV_DSP: 392 case SND_DEV_DSP16: 393 return dsp_poll(d, chan, events, p); 394 395 default: 396 return (events & 397 (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)) | POLLHUP; 398 } 399 } 400 401 /* 402 * The mmap interface allows access to the play and read buffer, 403 * plus the device descriptor. 404 * The various blocks are accessible at the following offsets: 405 * 406 * 0x00000000 ( 0 ) : write buffer ; 407 * 0x01000000 (16 MB) : read buffer ; 408 * 0x02000000 (32 MB) : device descriptor (dangerous!) 409 * 410 * WARNING: the mmap routines assume memory areas are aligned. This 411 * is true (probably) for the dma buffers, but likely false for the 412 * device descriptor. As a consequence, we do not know where it is 413 * located in the requested area. 414 */ 415 static int 416 sndmmap(dev_t i_dev, vm_offset_t offset, int nprot) 417 { 418 int unit, dev, chan; 419 snddev_info *d = get_snddev_info(i_dev, &unit, &dev, &chan); 420 421 DEB(printf("sndmmap d 0x%p dev 0x%04x ofs 0x%08x nprot 0x%08x\n", 422 d, dev, offset, nprot)); 423 424 if (d == NULL || nprot & PROT_EXEC) return -1; /* forbidden */ 425 426 switch(dev) { 427 case SND_DEV_AUDIO: 428 case SND_DEV_DSP: 429 case SND_DEV_DSP16: 430 return dsp_mmap(d, chan, offset, nprot); 431 432 default: 433 return -1; 434 } 435 } 436 437 static int 438 status_init(char *buf, int size) 439 { 440 int i; 441 device_t dev; 442 snddev_info *d; 443 444 snprintf(buf, size, "FreeBSD Audio Driver (newpcm) %s %s\n" 445 "Installed devices:\n", __DATE__, __TIME__); 446 447 for (i = 0; i <= devclass_get_maxunit(pcm_devclass); i++) { 448 d = gsd(i); 449 if (!d) continue; 450 dev = devclass_get_device(pcm_devclass, i); 451 if (1) { 452 snprintf(buf + strlen(buf), size - strlen(buf), 453 "pcm%d: <%s> %s", 454 i, device_get_desc(dev), d->status); 455 if (d->chancount > 0) 456 snprintf(buf + strlen(buf), size - strlen(buf), 457 " (%dp/%dr channels%s)\n", 458 d->playcount, d->reccount, 459 (!(d->flags & SD_F_SIMPLEX))? " duplex" : ""); 460 else 461 snprintf(buf + strlen(buf), size - strlen(buf), 462 " (mixer only)\n"); 463 } 464 } 465 return strlen(buf); 466 } 467 468 static int 469 status_read(struct uio *buf) 470 { 471 static char status_buf[4096]; 472 static int bufptr = 0, buflen = 0; 473 int l; 474 475 if (status_isopen == 1) { 476 status_isopen++; 477 bufptr = 0; 478 buflen = status_init(status_buf, sizeof status_buf); 479 } 480 481 l = min(buf->uio_resid, buflen - bufptr); 482 bufptr += l; 483 return (l > 0)? uiomove(status_buf + bufptr - l, l, buf) : 0; 484 } 485