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 } 187 188 if (numplay > 0) { 189 d->play = (pcm_channel *)malloc(numplay * sizeof(pcm_channel), 190 M_DEVBUF, M_NOWAIT); 191 if (!d->play) goto no; 192 bzero(d->play, numplay * sizeof(pcm_channel)); 193 } 194 195 if (numrec > 0) { 196 d->rec = (pcm_channel *)malloc(numrec * sizeof(pcm_channel), 197 M_DEVBUF, M_NOWAIT); 198 if (!d->rec) goto no; 199 bzero(d->rec, numrec * sizeof(pcm_channel)); 200 } 201 202 fkchan_setup(&d->fakechan); 203 chn_init(&d->fakechan, NULL, 0); 204 d->magic = MAGIC(unit); /* debugging... */ 205 d->swap = NULL; 206 207 return 0; 208 no: 209 if (d->aplay) free(d->aplay, M_DEVBUF); 210 if (d->play) free(d->play, M_DEVBUF); 211 if (d->arec) free(d->arec, M_DEVBUF); 212 if (d->rec) free(d->rec, M_DEVBUF); 213 return ENXIO; 214 } 215 216 /* 217 * a small utility function which, given a device number, returns 218 * a pointer to the associated snddev_info struct, and sets the unit 219 * number. 220 */ 221 static snddev_info * 222 get_snddev_info(dev_t i_dev, int *unit, int *dev, int *chan) 223 { 224 int u, d, c; 225 226 u = PCMUNIT(i_dev); 227 d = PCMDEV(i_dev); 228 c = PCMCHAN(i_dev); 229 if (u > devclass_get_maxunit(pcm_devclass)) u = -1; 230 if (unit) *unit = u; 231 if (dev) *dev = d; 232 if (chan) *chan = c; 233 if (u < 0) return NULL; 234 235 switch(d) { 236 case SND_DEV_CTL: /* /dev/mixer handled by pcm */ 237 case SND_DEV_STATUS: /* /dev/sndstat handled by pcm */ 238 case SND_DEV_DSP: 239 case SND_DEV_DSP16: 240 case SND_DEV_AUDIO: 241 return gsd(u); 242 243 case SND_DEV_SEQ: /* XXX when enabled... */ 244 case SND_DEV_SEQ2: 245 case SND_DEV_MIDIN: 246 case SND_DEV_SNDPROC: /* /dev/sndproc handled by pcm */ 247 default: 248 printf("unsupported subdevice %d\n", d); 249 return NULL; 250 } 251 } 252 253 static int 254 sndopen(dev_t i_dev, int flags, int mode, struct proc *p) 255 { 256 int dev, unit, chan; 257 snddev_info *d = get_snddev_info(i_dev, &unit, &dev, &chan); 258 259 DEB(printf("open snd%d subdev %d flags 0x%08x mode 0x%08x\n", 260 unit, dev, flags, mode)); 261 262 switch(dev) { 263 case SND_DEV_STATUS: 264 if (status_isopen) return EBUSY; 265 status_isopen = 1; 266 return 0; 267 268 case SND_DEV_CTL: 269 return d? 0 : ENXIO; 270 271 case SND_DEV_AUDIO: 272 case SND_DEV_DSP: 273 case SND_DEV_DSP16: 274 case SND_DEV_NORESET: 275 return d? dsp_open(d, chan, flags, dev) : ENXIO; 276 277 default: 278 return ENXIO; 279 } 280 } 281 282 static int 283 sndclose(dev_t i_dev, int flags, int mode, struct proc *p) 284 { 285 int dev, unit, chan; 286 snddev_info *d = get_snddev_info(i_dev, &unit, &dev, &chan); 287 288 DEB(printf("close snd%d subdev %d\n", unit, dev)); 289 290 switch(dev) { /* only those for which close makes sense */ 291 case SND_DEV_STATUS: 292 if (!status_isopen) return EBADF; 293 status_isopen = 0; 294 return 0; 295 296 case SND_DEV_CTL: 297 return d? 0 : ENXIO; 298 299 case SND_DEV_AUDIO: 300 case SND_DEV_DSP: 301 case SND_DEV_DSP16: 302 return d? dsp_close(d, chan, dev) : ENXIO; 303 304 default: 305 return ENXIO; 306 } 307 } 308 309 static int 310 sndread(dev_t i_dev, struct uio *buf, int flag) 311 { 312 int dev, unit, chan; 313 snddev_info *d = get_snddev_info(i_dev, &unit, &dev, &chan); 314 DEB(printf("read snd%d subdev %d flag 0x%08x\n", unit, dev, flag)); 315 316 switch(dev) { 317 case SND_DEV_STATUS: 318 return status_isopen? status_read(buf) : EBADF; 319 320 case SND_DEV_AUDIO: 321 case SND_DEV_DSP: 322 case SND_DEV_DSP16: 323 return d? dsp_read(d, chan, buf, flag) : EBADF; 324 325 default: 326 return ENXIO; 327 } 328 } 329 330 static int 331 sndwrite(dev_t i_dev, struct uio *buf, int flag) 332 { 333 int dev, unit, chan; 334 snddev_info *d = get_snddev_info(i_dev, &unit, &dev, &chan); 335 336 DEB(printf("write snd%d subdev %d flag 0x%08x\n", unit, dev & 0xf, flag)); 337 338 switch(dev) { /* only writeable devices */ 339 case SND_DEV_DSP: 340 case SND_DEV_DSP16: 341 case SND_DEV_AUDIO: 342 return d? dsp_write(d, chan, buf, flag) : EBADF; 343 344 default: 345 return EPERM; /* for non-writeable devices ; */ 346 } 347 } 348 349 static int 350 sndioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct proc * p) 351 { 352 int dev, chan; 353 snddev_info *d = get_snddev_info(i_dev, NULL, &dev, &chan); 354 355 if (d == NULL) return ENXIO; 356 357 switch(dev) { 358 case SND_DEV_CTL: 359 return mixer_ioctl(d, cmd, arg); 360 361 case SND_DEV_AUDIO: 362 case SND_DEV_DSP: 363 case SND_DEV_DSP16: 364 if (IOCGROUP(cmd) == 'M') 365 return mixer_ioctl(d, cmd, arg); 366 else 367 return dsp_ioctl(d, chan, cmd, arg); 368 369 default: 370 return ENXIO; 371 } 372 } 373 374 static int 375 sndpoll(dev_t i_dev, int events, struct proc *p) 376 { 377 int dev, chan; 378 snddev_info *d = get_snddev_info(i_dev, NULL, &dev, &chan); 379 380 DEB(printf("sndpoll d 0x%p dev 0x%04x events 0x%08x\n", d, dev, events)); 381 382 if (d == NULL) return ENXIO; 383 384 switch(dev) { 385 case SND_DEV_AUDIO: 386 case SND_DEV_DSP: 387 case SND_DEV_DSP16: 388 return dsp_poll(d, chan, events, p); 389 390 default: 391 return (events & 392 (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)) | POLLHUP; 393 } 394 } 395 396 /* 397 * The mmap interface allows access to the play and read buffer, 398 * plus the device descriptor. 399 * The various blocks are accessible at the following offsets: 400 * 401 * 0x00000000 ( 0 ) : write buffer ; 402 * 0x01000000 (16 MB) : read buffer ; 403 * 0x02000000 (32 MB) : device descriptor (dangerous!) 404 * 405 * WARNING: the mmap routines assume memory areas are aligned. This 406 * is true (probably) for the dma buffers, but likely false for the 407 * device descriptor. As a consequence, we do not know where it is 408 * located in the requested area. 409 */ 410 static int 411 sndmmap(dev_t i_dev, vm_offset_t offset, int nprot) 412 { 413 int unit, dev, chan; 414 snddev_info *d = get_snddev_info(i_dev, &unit, &dev, &chan); 415 416 DEB(printf("sndmmap d 0x%p dev 0x%04x ofs 0x%08x nprot 0x%08x\n", 417 d, dev, offset, nprot)); 418 419 if (d == NULL || nprot & PROT_EXEC) return -1; /* forbidden */ 420 421 switch(dev) { 422 case SND_DEV_AUDIO: 423 case SND_DEV_DSP: 424 case SND_DEV_DSP16: 425 return dsp_mmap(d, chan, offset, nprot); 426 427 default: 428 return -1; 429 } 430 } 431 432 static int 433 status_init(char *buf, int size) 434 { 435 int i; 436 device_t dev; 437 snddev_info *d; 438 439 snprintf(buf, size, "FreeBSD Audio Driver (newpcm) %s %s\n" 440 "Installed devices:\n", __DATE__, __TIME__); 441 442 for (i = 0; i <= devclass_get_maxunit(pcm_devclass); i++) { 443 d = gsd(i); 444 if (!d) continue; 445 dev = devclass_get_device(pcm_devclass, i); 446 if (1) { 447 snprintf(buf + strlen(buf), size - strlen(buf), 448 "pcm%d: <%s> %s", 449 i, device_get_desc(dev), d->status); 450 if (d->chancount > 0) 451 snprintf(buf + strlen(buf), size - strlen(buf), 452 " (%dp/%dr channels%s)\n", 453 d->playcount, d->reccount, 454 (!(d->flags & SD_F_SIMPLEX))? " duplex" : ""); 455 else 456 snprintf(buf + strlen(buf), size - strlen(buf), 457 " (mixer only)\n"); 458 } 459 } 460 return strlen(buf); 461 } 462 463 static int 464 status_read(struct uio *buf) 465 { 466 static char status_buf[4096]; 467 static int bufptr = 0, buflen = 0; 468 int l; 469 470 if (status_isopen == 1) { 471 status_isopen++; 472 bufptr = 0; 473 buflen = status_init(status_buf, sizeof status_buf); 474 } 475 476 l = min(buf->uio_resid, buflen - bufptr); 477 bufptr += l; 478 return (l > 0)? uiomove(status_buf + bufptr - l, l, buf) : 0; 479 } 480