pad.c revision 1.6
1 /* $NetBSD: pad.c,v 1.6 2008/03/04 18:23:44 cube Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Jared D. McNeill. 18 * 4. Neither the name of The NetBSD Foundation nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: pad.c,v 1.6 2008/03/04 18:23:44 cube Exp $"); 37 38 #include <sys/types.h> 39 #include <sys/param.h> 40 #include <sys/conf.h> 41 #include <sys/buf.h> 42 #include <sys/kmem.h> 43 #include <sys/kernel.h> 44 #include <sys/device.h> 45 #include <sys/proc.h> 46 #include <sys/condvar.h> 47 #include <sys/select.h> 48 #include <sys/audioio.h> 49 #include <sys/vnode.h> 50 51 #include <dev/audio_if.h> 52 #include <dev/audiovar.h> 53 #include <dev/auconv.h> 54 55 #include <dev/pad/padvar.h> 56 #include <dev/pad/padvol.h> 57 58 #define PADUNIT(x) minor(x) 59 60 extern struct cfdriver pad_cd; 61 62 static struct audio_device pad_device = { 63 "Pseudo Audio", 64 "1.0", 65 "pad", 66 }; 67 68 typedef struct pad_block { 69 uint8_t *pb_ptr; 70 int pb_len; 71 } pad_block_t; 72 73 enum { 74 PAD_OUTPUT_CLASS, 75 PAD_INPUT_CLASS, 76 PAD_OUTPUT_MASTER_VOLUME, 77 PAD_INPUT_DAC_VOLUME, 78 PAD_ENUM_LAST, 79 }; 80 81 static int pad_match(device_t, struct cfdata *, void *); 82 static void pad_attach(device_t, device_t, void *); 83 static int pad_detach(device_t, int); 84 static void pad_childdet(device_t, device_t); 85 86 static int pad_query_encoding(void *, struct audio_encoding *); 87 static int pad_set_params(void *, int, int, 88 audio_params_t *, audio_params_t *, 89 stream_filter_list_t *, stream_filter_list_t *); 90 static int pad_start_output(void *, void *, int, 91 void (*)(void *), void *); 92 static int pad_start_input(void *, void *, int, 93 void (*)(void *), void *); 94 static int pad_halt_output(void *); 95 static int pad_halt_input(void *); 96 static int pad_getdev(void *, struct audio_device *); 97 static int pad_set_port(void *, mixer_ctrl_t *); 98 static int pad_get_port(void *, mixer_ctrl_t *); 99 static int pad_query_devinfo(void *, mixer_devinfo_t *); 100 static int pad_get_props(void *); 101 static int pad_round_blocksize(void *, int, int, const audio_params_t *); 102 103 static const struct audio_hw_if pad_hw_if = { 104 .query_encoding = pad_query_encoding, 105 .set_params = pad_set_params, 106 .start_output = pad_start_output, 107 .start_input = pad_start_input, 108 .halt_output = pad_halt_output, 109 .halt_input = pad_halt_input, 110 .getdev = pad_getdev, 111 .set_port = pad_set_port, 112 .get_port = pad_get_port, 113 .query_devinfo = pad_query_devinfo, 114 .get_props = pad_get_props, 115 .round_blocksize = pad_round_blocksize, 116 }; 117 118 #define PAD_NFORMATS 1 119 static const struct audio_format pad_formats[PAD_NFORMATS] = { 120 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 121 2, AUFMT_STEREO, 1, { 44100 } }, 122 }; 123 124 extern void padattach(int); 125 126 static pad_softc_t * pad_find_softc(dev_t); 127 static int pad_add_block(pad_softc_t *, uint8_t *, int); 128 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 129 130 dev_type_open(pad_open); 131 dev_type_close(pad_close); 132 dev_type_read(pad_read); 133 134 const struct cdevsw pad_cdevsw = { 135 .d_open = pad_open, 136 .d_close = pad_close, 137 .d_read = pad_read, 138 .d_write = nowrite, 139 .d_ioctl = noioctl, 140 .d_stop = nostop, 141 .d_tty = notty, 142 .d_poll = nopoll, 143 .d_mmap = nommap, 144 .d_kqfilter = nokqfilter, 145 .d_flag = D_OTHER, 146 }; 147 148 CFATTACH_DECL2(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 149 NULL, NULL, pad_childdet); 150 151 void 152 padattach(int n) 153 { 154 int i, err; 155 struct cfdata *cf; 156 157 #ifdef DEBUG 158 printf("pad: requested %d units\n", n); 159 #endif 160 161 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 162 if (err) { 163 aprint_error("%s: couldn't register cfattach: %d\n", 164 pad_cd.cd_name, err); 165 config_cfdriver_detach(&pad_cd); 166 return; 167 } 168 169 for (i = 0; i < n; i++) { 170 cf = kmem_alloc(sizeof(struct cfdata), KM_NOSLEEP); 171 if (cf == NULL) { 172 aprint_error("%s: couldn't allocate cfdata\n", 173 pad_cd.cd_name); 174 continue; 175 } 176 cf->cf_name = pad_cd.cd_name; 177 cf->cf_atname = pad_cd.cd_name; 178 cf->cf_unit = i; 179 cf->cf_fstate = FSTATE_STAR; 180 181 (void)config_attach_pseudo(cf); 182 } 183 184 return; 185 } 186 187 static pad_softc_t * 188 pad_find_softc(dev_t dev) 189 { 190 int unit; 191 192 unit = PADUNIT(dev); 193 if (unit >= pad_cd.cd_ndevs) 194 return NULL; 195 196 return pad_cd.cd_devs[unit]; 197 } 198 199 static int 200 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 201 { 202 int l; 203 204 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 205 return ENOBUFS; 206 207 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 208 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 209 else { 210 l = PAD_BUFSIZE - sc->sc_wpos; 211 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 212 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 213 } 214 215 sc->sc_wpos += blksize; 216 if (sc->sc_wpos > PAD_BUFSIZE) 217 sc->sc_wpos -= PAD_BUFSIZE; 218 219 sc->sc_buflen += blksize; 220 221 return 0; 222 } 223 224 static int 225 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 226 { 227 int l; 228 229 KASSERT(pb != NULL); 230 231 if (sc->sc_buflen < blksize) 232 return ERESTART; 233 234 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 235 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 236 pb->pb_len = blksize; 237 sc->sc_rpos += blksize; 238 } else { 239 l = PAD_BUFSIZE - sc->sc_rpos; 240 pb->pb_len = l; 241 sc->sc_rpos = 0; 242 } 243 sc->sc_buflen -= pb->pb_len; 244 245 return 0; 246 } 247 248 static int 249 pad_match(device_t parent, struct cfdata *data, void *opaque) 250 { 251 return 1; 252 } 253 254 static void 255 pad_childdet(device_t self, device_t child) 256 { 257 pad_softc_t *sc = device_private(self); 258 259 KASSERT(sc->sc_audiodev->dev == child); 260 sc->sc_audiodev = NULL; 261 } 262 263 static void 264 pad_attach(device_t parent, device_t self, void *opaque) 265 { 266 pad_softc_t *sc = device_private(self); 267 268 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 269 270 sc->sc_open = 0; 271 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 272 &sc->sc_encodings) != 0) { 273 aprint_error_dev(self, "couldn't create encodings\n"); 274 return; 275 } 276 277 cv_init(&sc->sc_condvar, device_xname(self)); 278 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_SCHED); 279 280 sc->sc_swvol = 255; 281 sc->sc_buflen = 0; 282 sc->sc_rpos = sc->sc_wpos = 0; 283 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, &sc->sc_dev); 284 285 if (!pmf_device_register(self, NULL, NULL)) 286 aprint_error_dev(self, "couldn't establish power handler\n"); 287 288 return; 289 } 290 291 static int 292 pad_detach(device_t self, int flags) 293 { 294 pad_softc_t *sc = device_private(self); 295 int cmaj, mn, rc; 296 297 cmaj = cdevsw_lookup_major(&pad_cdevsw); 298 mn = device_unit(self); 299 vdevgone(cmaj, mn, mn, VCHR); 300 301 if ((rc = config_detach_children(self, flags)) != 0) 302 return rc; 303 304 pmf_device_deregister(self); 305 306 mutex_destroy(&sc->sc_mutex); 307 cv_destroy(&sc->sc_condvar); 308 309 auconv_delete_encodings(sc->sc_encodings); 310 311 return 0; 312 } 313 314 int 315 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 316 { 317 pad_softc_t *sc; 318 319 sc = pad_find_softc(dev); 320 if (sc == NULL) 321 return ENODEV; 322 323 if (sc->sc_open++) { 324 sc->sc_open--; 325 return EBUSY; 326 } 327 328 return 0; 329 } 330 331 int 332 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 333 { 334 pad_softc_t *sc; 335 336 sc = pad_find_softc(dev); 337 if (sc == NULL) 338 return ENODEV; 339 340 KASSERT(sc->sc_open > 0); 341 sc->sc_open--; 342 343 return 0; 344 } 345 346 int 347 pad_read(dev_t dev, struct uio *uio, int flags) 348 { 349 pad_softc_t *sc; 350 pad_block_t pb; 351 void (*intr)(void *); 352 void *intrarg; 353 int err; 354 355 sc = pad_find_softc(dev); 356 if (sc == NULL) 357 return ENODEV; 358 359 err = 0; 360 361 intr = sc->sc_intr; 362 intrarg = sc->sc_intrarg; 363 364 while (uio->uio_resid > 0 && !err) { 365 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 366 if (!err) 367 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 368 else { 369 if (intr) { 370 (*intr)(intrarg); 371 intr = sc->sc_intr; 372 intrarg = sc->sc_intrarg; 373 err = 0; 374 continue; 375 } 376 377 mutex_enter(&sc->sc_mutex); 378 err = cv_timedwait_sig(&sc->sc_condvar, &sc->sc_mutex, 379 hz/100); 380 if (err != 0 && err != EWOULDBLOCK) { 381 mutex_exit(&sc->sc_mutex); 382 aprint_error_dev(&sc->sc_dev, 383 "cv_timedwait_sig returned %d\n", err); 384 return EINTR; 385 } 386 intr = sc->sc_intr; 387 intrarg = sc->sc_intrarg; 388 mutex_exit(&sc->sc_mutex); 389 err = 0; 390 } 391 } 392 393 if (intr) 394 (*intr)(intrarg); 395 396 return err; 397 } 398 399 static int 400 pad_query_encoding(void *opaque, struct audio_encoding *ae) 401 { 402 pad_softc_t *sc; 403 404 sc = (pad_softc_t *)opaque; 405 406 return auconv_query_encoding(sc->sc_encodings, ae); 407 } 408 409 static int 410 pad_set_params(void *opaque, int setmode, int usemode, 411 audio_params_t *play, audio_params_t *rec, 412 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 413 { 414 pad_softc_t *sc; 415 416 sc = (pad_softc_t *)opaque; 417 418 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 419 play, true, pfil) < 0) 420 return EINVAL; 421 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 422 rec, true, rfil) < 0) 423 return EINVAL; 424 425 if (pfil->req_size > 0) 426 play = &pfil->filters[0].param; 427 switch (play->encoding) { 428 case AUDIO_ENCODING_SLINEAR_LE: 429 if (play->precision == 16 && play->validbits == 16) 430 pfil->prepend(pfil, pad_vol_slinear16_le, play); 431 break; 432 case AUDIO_ENCODING_SLINEAR_BE: 433 if (play->precision == 16 && play->validbits == 16) 434 pfil->prepend(pfil, pad_vol_slinear16_be, play); 435 break; 436 default: 437 break; 438 } 439 440 return 0; 441 } 442 443 static int 444 pad_start_output(void *opaque, void *block, int blksize, 445 void (*intr)(void *), void *intrarg) 446 { 447 pad_softc_t *sc; 448 int err; 449 450 sc = (pad_softc_t *)opaque; 451 452 mutex_enter(&sc->sc_mutex); 453 454 sc->sc_intr = intr; 455 sc->sc_intrarg = intrarg; 456 sc->sc_blksize = blksize; 457 458 err = pad_add_block(sc, block, blksize); 459 460 cv_signal(&sc->sc_condvar); 461 462 mutex_exit(&sc->sc_mutex); 463 464 return err; 465 } 466 467 static int 468 pad_start_input(void *opaque, void *block, int blksize, 469 void (*intr)(void *), void *intrarg) 470 { 471 return EINVAL; 472 } 473 474 static int 475 pad_halt_output(void *opaque) 476 { 477 pad_softc_t *sc; 478 479 sc = (pad_softc_t *)opaque; 480 sc->sc_intr = NULL; 481 sc->sc_intrarg = NULL; 482 sc->sc_buflen = 0; 483 sc->sc_rpos = sc->sc_wpos = 0; 484 485 return 0; 486 } 487 488 static int 489 pad_halt_input(void *opaque) 490 { 491 return 0; 492 } 493 494 static int 495 pad_getdev(void *opaque, struct audio_device *ret) 496 { 497 498 *ret = pad_device; 499 500 return 0; 501 } 502 503 static int 504 pad_set_port(void *opaque, mixer_ctrl_t *mc) 505 { 506 pad_softc_t *sc; 507 508 sc = (pad_softc_t *)opaque; 509 510 switch (mc->dev) { 511 case PAD_OUTPUT_MASTER_VOLUME: 512 case PAD_INPUT_DAC_VOLUME: 513 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 514 return 0; 515 } 516 517 return ENXIO; 518 } 519 520 static int 521 pad_get_port(void *opaque, mixer_ctrl_t *mc) 522 { 523 pad_softc_t *sc; 524 525 sc = (pad_softc_t *)opaque; 526 527 switch (mc->dev) { 528 case PAD_OUTPUT_MASTER_VOLUME: 529 case PAD_INPUT_DAC_VOLUME: 530 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 531 return 0; 532 } 533 534 return ENXIO; 535 } 536 537 static int 538 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 539 { 540 pad_softc_t *sc; 541 542 sc = (pad_softc_t *)opaque; 543 544 switch (di->index) { 545 case PAD_OUTPUT_CLASS: 546 di->mixer_class = PAD_OUTPUT_CLASS; 547 strcpy(di->label.name, AudioCoutputs); 548 di->type = AUDIO_MIXER_CLASS; 549 di->next = di->prev = AUDIO_MIXER_LAST; 550 return 0; 551 case PAD_INPUT_CLASS: 552 di->mixer_class = PAD_INPUT_CLASS; 553 strcpy(di->label.name, AudioCinputs); 554 di->type = AUDIO_MIXER_CLASS; 555 di->next = di->prev = AUDIO_MIXER_LAST; 556 return 0; 557 case PAD_OUTPUT_MASTER_VOLUME: 558 di->mixer_class = PAD_OUTPUT_CLASS; 559 strcpy(di->label.name, AudioNmaster); 560 di->type = AUDIO_MIXER_VALUE; 561 di->next = di->prev = AUDIO_MIXER_LAST; 562 di->un.v.num_channels = 1; 563 strcpy(di->un.v.units.name, AudioNvolume); 564 return 0; 565 case PAD_INPUT_DAC_VOLUME: 566 di->mixer_class = PAD_INPUT_CLASS; 567 strcpy(di->label.name, AudioNdac); 568 di->type = AUDIO_MIXER_VALUE; 569 di->next = di->prev = AUDIO_MIXER_LAST; 570 di->un.v.num_channels = 1; 571 strcpy(di->un.v.units.name, AudioNvolume); 572 return 0; 573 } 574 575 return ENXIO; 576 } 577 578 static int 579 pad_get_props(void *opaque) 580 { 581 return 0; 582 } 583 584 static int 585 pad_round_blocksize(void *opaque, int blksize, int mode, 586 const audio_params_t *p) 587 { 588 return PAD_BLKSIZE; 589 } 590
Indexes created Thu Oct 02 14:10:14 GMT 2025