pad.c revision 1.11
1 /* $NetBSD: pad.c,v 1.11 2009/03/14 11:08:28 ad 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: pad.c,v 1.11 2009/03/14 11:08:28 ad Exp $"); 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/conf.h> 35 #include <sys/buf.h> 36 #include <sys/kmem.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/proc.h> 40 #include <sys/condvar.h> 41 #include <sys/select.h> 42 #include <sys/audioio.h> 43 #include <sys/vnode.h> 44 45 #include <dev/audio_if.h> 46 #include <dev/audiovar.h> 47 #include <dev/auconv.h> 48 49 #include <dev/pad/padvar.h> 50 #include <dev/pad/padvol.h> 51 52 #define PADUNIT(x) minor(x) 53 54 extern struct cfdriver pad_cd; 55 56 static struct audio_device pad_device = { 57 "Pseudo Audio", 58 "1.0", 59 "pad", 60 }; 61 62 typedef struct pad_block { 63 uint8_t *pb_ptr; 64 int pb_len; 65 } pad_block_t; 66 67 enum { 68 PAD_OUTPUT_CLASS, 69 PAD_INPUT_CLASS, 70 PAD_OUTPUT_MASTER_VOLUME, 71 PAD_INPUT_DAC_VOLUME, 72 PAD_ENUM_LAST, 73 }; 74 75 static int pad_match(device_t, cfdata_t, void *); 76 static void pad_attach(device_t, device_t, void *); 77 static int pad_detach(device_t, int); 78 static void pad_childdet(device_t, device_t); 79 80 static int pad_query_encoding(void *, struct audio_encoding *); 81 static int pad_set_params(void *, int, int, 82 audio_params_t *, audio_params_t *, 83 stream_filter_list_t *, stream_filter_list_t *); 84 static int pad_start_output(void *, void *, int, 85 void (*)(void *), void *); 86 static int pad_start_input(void *, void *, int, 87 void (*)(void *), void *); 88 static int pad_halt_output(void *); 89 static int pad_halt_input(void *); 90 static int pad_getdev(void *, struct audio_device *); 91 static int pad_set_port(void *, mixer_ctrl_t *); 92 static int pad_get_port(void *, mixer_ctrl_t *); 93 static int pad_query_devinfo(void *, mixer_devinfo_t *); 94 static int pad_get_props(void *); 95 static int pad_round_blocksize(void *, int, int, const audio_params_t *); 96 97 static const struct audio_hw_if pad_hw_if = { 98 .query_encoding = pad_query_encoding, 99 .set_params = pad_set_params, 100 .start_output = pad_start_output, 101 .start_input = pad_start_input, 102 .halt_output = pad_halt_output, 103 .halt_input = pad_halt_input, 104 .getdev = pad_getdev, 105 .set_port = pad_set_port, 106 .get_port = pad_get_port, 107 .query_devinfo = pad_query_devinfo, 108 .get_props = pad_get_props, 109 .round_blocksize = pad_round_blocksize, 110 }; 111 112 #define PAD_NFORMATS 1 113 static const struct audio_format pad_formats[PAD_NFORMATS] = { 114 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 115 2, AUFMT_STEREO, 1, { 44100 } }, 116 }; 117 118 extern void padattach(int); 119 120 static int pad_add_block(pad_softc_t *, uint8_t *, int); 121 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 122 123 dev_type_open(pad_open); 124 dev_type_close(pad_close); 125 dev_type_read(pad_read); 126 127 const struct cdevsw pad_cdevsw = { 128 .d_open = pad_open, 129 .d_close = pad_close, 130 .d_read = pad_read, 131 .d_write = nowrite, 132 .d_ioctl = noioctl, 133 .d_stop = nostop, 134 .d_tty = notty, 135 .d_poll = nopoll, 136 .d_mmap = nommap, 137 .d_kqfilter = nokqfilter, 138 .d_flag = D_OTHER, 139 }; 140 141 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 142 NULL, NULL, pad_childdet); 143 144 void 145 padattach(int n) 146 { 147 int i, err; 148 cfdata_t cf; 149 150 aprint_debug("pad: requested %d units\n", n); 151 152 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 153 if (err) { 154 aprint_error("%s: couldn't register cfattach: %d\n", 155 pad_cd.cd_name, err); 156 config_cfdriver_detach(&pad_cd); 157 return; 158 } 159 160 for (i = 0; i < n; i++) { 161 cf = kmem_alloc(sizeof(struct cfdata), KM_NOSLEEP); 162 if (cf == NULL) { 163 aprint_error("%s: couldn't allocate cfdata\n", 164 pad_cd.cd_name); 165 continue; 166 } 167 cf->cf_name = pad_cd.cd_name; 168 cf->cf_atname = pad_cd.cd_name; 169 cf->cf_unit = i; 170 cf->cf_fstate = FSTATE_STAR; 171 172 (void)config_attach_pseudo(cf); 173 } 174 175 return; 176 } 177 178 static int 179 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 180 { 181 int l; 182 183 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 184 return ENOBUFS; 185 186 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 187 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 188 else { 189 l = PAD_BUFSIZE - sc->sc_wpos; 190 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 191 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 192 } 193 194 sc->sc_wpos += blksize; 195 if (sc->sc_wpos > PAD_BUFSIZE) 196 sc->sc_wpos -= PAD_BUFSIZE; 197 198 sc->sc_buflen += blksize; 199 200 return 0; 201 } 202 203 static int 204 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 205 { 206 int l; 207 208 KASSERT(pb != NULL); 209 210 if (sc->sc_buflen < blksize) 211 return ERESTART; 212 213 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 214 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 215 pb->pb_len = blksize; 216 sc->sc_rpos += blksize; 217 } else { 218 l = PAD_BUFSIZE - sc->sc_rpos; 219 pb->pb_len = l; 220 sc->sc_rpos = 0; 221 } 222 sc->sc_buflen -= pb->pb_len; 223 224 return 0; 225 } 226 227 static int 228 pad_match(device_t parent, cfdata_t data, void *opaque) 229 { 230 return 1; 231 } 232 233 static void 234 pad_childdet(device_t self, device_t child) 235 { 236 pad_softc_t *sc = device_private(self); 237 238 sc->sc_audiodev = NULL; 239 } 240 241 static void 242 pad_attach(device_t parent, device_t self, void *opaque) 243 { 244 pad_softc_t *sc = device_private(self); 245 246 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 247 248 sc->sc_dev = self; 249 sc->sc_open = 0; 250 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 251 &sc->sc_encodings) != 0) { 252 aprint_error_dev(self, "couldn't create encodings\n"); 253 return; 254 } 255 256 cv_init(&sc->sc_condvar, device_xname(self)); 257 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_SCHED); 258 259 sc->sc_swvol = 255; 260 sc->sc_buflen = 0; 261 sc->sc_rpos = sc->sc_wpos = 0; 262 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 263 264 if (!pmf_device_register(self, NULL, NULL)) 265 aprint_error_dev(self, "couldn't establish power handler\n"); 266 267 return; 268 } 269 270 static int 271 pad_detach(device_t self, int flags) 272 { 273 pad_softc_t *sc = device_private(self); 274 int cmaj, mn, rc; 275 276 cmaj = cdevsw_lookup_major(&pad_cdevsw); 277 mn = device_unit(self); 278 vdevgone(cmaj, mn, mn, VCHR); 279 280 if ((rc = config_detach_children(self, flags)) != 0) 281 return rc; 282 283 pmf_device_deregister(self); 284 285 mutex_destroy(&sc->sc_mutex); 286 cv_destroy(&sc->sc_condvar); 287 288 auconv_delete_encodings(sc->sc_encodings); 289 290 return 0; 291 } 292 293 int 294 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 295 { 296 pad_softc_t *sc; 297 298 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 299 if (sc == NULL) 300 return ENODEV; 301 302 if (sc->sc_open++) { 303 sc->sc_open--; 304 return EBUSY; 305 } 306 307 return 0; 308 } 309 310 int 311 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 312 { 313 pad_softc_t *sc; 314 315 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 316 if (sc == NULL) 317 return ENODEV; 318 319 KASSERT(sc->sc_open > 0); 320 sc->sc_open--; 321 322 return 0; 323 } 324 325 int 326 pad_read(dev_t dev, struct uio *uio, int flags) 327 { 328 pad_softc_t *sc; 329 pad_block_t pb; 330 void (*intr)(void *); 331 void *intrarg; 332 int err; 333 334 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 335 if (sc == NULL) 336 return ENODEV; 337 338 err = 0; 339 340 intr = sc->sc_intr; 341 intrarg = sc->sc_intrarg; 342 343 while (uio->uio_resid > 0 && !err) { 344 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 345 if (!err) 346 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 347 else { 348 if (intr) { 349 (*intr)(intrarg); 350 intr = sc->sc_intr; 351 intrarg = sc->sc_intrarg; 352 err = 0; 353 continue; 354 } 355 356 mutex_enter(&sc->sc_mutex); 357 err = cv_timedwait_sig(&sc->sc_condvar, &sc->sc_mutex, 358 hz/100); 359 if (err != 0 && err != EWOULDBLOCK) { 360 mutex_exit(&sc->sc_mutex); 361 aprint_error_dev(sc->sc_dev, 362 "cv_timedwait_sig returned %d\n", err); 363 return EINTR; 364 } 365 intr = sc->sc_intr; 366 intrarg = sc->sc_intrarg; 367 mutex_exit(&sc->sc_mutex); 368 err = 0; 369 } 370 } 371 372 if (intr) 373 (*intr)(intrarg); 374 375 return err; 376 } 377 378 static int 379 pad_query_encoding(void *opaque, struct audio_encoding *ae) 380 { 381 pad_softc_t *sc; 382 383 sc = (pad_softc_t *)opaque; 384 385 return auconv_query_encoding(sc->sc_encodings, ae); 386 } 387 388 static int 389 pad_set_params(void *opaque, int setmode, int usemode, 390 audio_params_t *play, audio_params_t *rec, 391 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 392 { 393 pad_softc_t *sc; 394 395 sc = (pad_softc_t *)opaque; 396 397 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 398 play, true, pfil) < 0) 399 return EINVAL; 400 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 401 rec, true, rfil) < 0) 402 return EINVAL; 403 404 if (pfil->req_size > 0) 405 play = &pfil->filters[0].param; 406 switch (play->encoding) { 407 case AUDIO_ENCODING_SLINEAR_LE: 408 if (play->precision == 16 && play->validbits == 16) 409 pfil->prepend(pfil, pad_vol_slinear16_le, play); 410 break; 411 case AUDIO_ENCODING_SLINEAR_BE: 412 if (play->precision == 16 && play->validbits == 16) 413 pfil->prepend(pfil, pad_vol_slinear16_be, play); 414 break; 415 default: 416 break; 417 } 418 419 return 0; 420 } 421 422 static int 423 pad_start_output(void *opaque, void *block, int blksize, 424 void (*intr)(void *), void *intrarg) 425 { 426 pad_softc_t *sc; 427 int err; 428 429 sc = (pad_softc_t *)opaque; 430 431 mutex_enter(&sc->sc_mutex); 432 433 sc->sc_intr = intr; 434 sc->sc_intrarg = intrarg; 435 sc->sc_blksize = blksize; 436 437 err = pad_add_block(sc, block, blksize); 438 439 cv_signal(&sc->sc_condvar); 440 441 mutex_exit(&sc->sc_mutex); 442 443 return err; 444 } 445 446 static int 447 pad_start_input(void *opaque, void *block, int blksize, 448 void (*intr)(void *), void *intrarg) 449 { 450 return EINVAL; 451 } 452 453 static int 454 pad_halt_output(void *opaque) 455 { 456 pad_softc_t *sc; 457 458 sc = (pad_softc_t *)opaque; 459 sc->sc_intr = NULL; 460 sc->sc_intrarg = NULL; 461 sc->sc_buflen = 0; 462 sc->sc_rpos = sc->sc_wpos = 0; 463 464 return 0; 465 } 466 467 static int 468 pad_halt_input(void *opaque) 469 { 470 return 0; 471 } 472 473 static int 474 pad_getdev(void *opaque, struct audio_device *ret) 475 { 476 477 *ret = pad_device; 478 479 return 0; 480 } 481 482 static int 483 pad_set_port(void *opaque, mixer_ctrl_t *mc) 484 { 485 pad_softc_t *sc; 486 487 sc = (pad_softc_t *)opaque; 488 489 switch (mc->dev) { 490 case PAD_OUTPUT_MASTER_VOLUME: 491 case PAD_INPUT_DAC_VOLUME: 492 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 493 return 0; 494 } 495 496 return ENXIO; 497 } 498 499 static int 500 pad_get_port(void *opaque, mixer_ctrl_t *mc) 501 { 502 pad_softc_t *sc; 503 504 sc = (pad_softc_t *)opaque; 505 506 switch (mc->dev) { 507 case PAD_OUTPUT_MASTER_VOLUME: 508 case PAD_INPUT_DAC_VOLUME: 509 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 510 return 0; 511 } 512 513 return ENXIO; 514 } 515 516 static int 517 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 518 { 519 pad_softc_t *sc; 520 521 sc = (pad_softc_t *)opaque; 522 523 switch (di->index) { 524 case PAD_OUTPUT_CLASS: 525 di->mixer_class = PAD_OUTPUT_CLASS; 526 strcpy(di->label.name, AudioCoutputs); 527 di->type = AUDIO_MIXER_CLASS; 528 di->next = di->prev = AUDIO_MIXER_LAST; 529 return 0; 530 case PAD_INPUT_CLASS: 531 di->mixer_class = PAD_INPUT_CLASS; 532 strcpy(di->label.name, AudioCinputs); 533 di->type = AUDIO_MIXER_CLASS; 534 di->next = di->prev = AUDIO_MIXER_LAST; 535 return 0; 536 case PAD_OUTPUT_MASTER_VOLUME: 537 di->mixer_class = PAD_OUTPUT_CLASS; 538 strcpy(di->label.name, AudioNmaster); 539 di->type = AUDIO_MIXER_VALUE; 540 di->next = di->prev = AUDIO_MIXER_LAST; 541 di->un.v.num_channels = 1; 542 strcpy(di->un.v.units.name, AudioNvolume); 543 return 0; 544 case PAD_INPUT_DAC_VOLUME: 545 di->mixer_class = PAD_INPUT_CLASS; 546 strcpy(di->label.name, AudioNdac); 547 di->type = AUDIO_MIXER_VALUE; 548 di->next = di->prev = AUDIO_MIXER_LAST; 549 di->un.v.num_channels = 1; 550 strcpy(di->un.v.units.name, AudioNvolume); 551 return 0; 552 } 553 554 return ENXIO; 555 } 556 557 static int 558 pad_get_props(void *opaque) 559 { 560 return 0; 561 } 562 563 static int 564 pad_round_blocksize(void *opaque, int blksize, int mode, 565 const audio_params_t *p) 566 { 567 return PAD_BLKSIZE; 568 } 569
Indexes created Thu Oct 02 10:09:58 GMT 2025