pad.c revision 1.9
1 /* $NetBSD: pad.c,v 1.9 2008/08/06 16:31:15 drochner 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 1.9 2008/08/06 16:31:15 drochner 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, struct cfdata *, 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(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 struct cfdata *cf; 149 150 #ifdef DEBUG 151 printf("pad: requested %d units\n", n); 152 #endif 153 154 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 155 if (err) { 156 aprint_error("%s: couldn't register cfattach: %d\n", 157 pad_cd.cd_name, err); 158 config_cfdriver_detach(&pad_cd); 159 return; 160 } 161 162 for (i = 0; i < n; i++) { 163 cf = kmem_alloc(sizeof(struct cfdata), KM_NOSLEEP); 164 if (cf == NULL) { 165 aprint_error("%s: couldn't allocate cfdata\n", 166 pad_cd.cd_name); 167 continue; 168 } 169 cf->cf_name = pad_cd.cd_name; 170 cf->cf_atname = pad_cd.cd_name; 171 cf->cf_unit = i; 172 cf->cf_fstate = FSTATE_STAR; 173 174 (void)config_attach_pseudo(cf); 175 } 176 177 return; 178 } 179 180 static int 181 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 182 { 183 int l; 184 185 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 186 return ENOBUFS; 187 188 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 189 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 190 else { 191 l = PAD_BUFSIZE - sc->sc_wpos; 192 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 193 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 194 } 195 196 sc->sc_wpos += blksize; 197 if (sc->sc_wpos > PAD_BUFSIZE) 198 sc->sc_wpos -= PAD_BUFSIZE; 199 200 sc->sc_buflen += blksize; 201 202 return 0; 203 } 204 205 static int 206 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 207 { 208 int l; 209 210 KASSERT(pb != NULL); 211 212 if (sc->sc_buflen < blksize) 213 return ERESTART; 214 215 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 216 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 217 pb->pb_len = blksize; 218 sc->sc_rpos += blksize; 219 } else { 220 l = PAD_BUFSIZE - sc->sc_rpos; 221 pb->pb_len = l; 222 sc->sc_rpos = 0; 223 } 224 sc->sc_buflen -= pb->pb_len; 225 226 return 0; 227 } 228 229 static int 230 pad_match(device_t parent, struct cfdata *data, void *opaque) 231 { 232 return 1; 233 } 234 235 static void 236 pad_childdet(device_t self, device_t child) 237 { 238 pad_softc_t *sc = device_private(self); 239 240 sc->sc_audiodev = NULL; 241 } 242 243 static void 244 pad_attach(device_t parent, device_t self, void *opaque) 245 { 246 pad_softc_t *sc = device_private(self); 247 248 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 249 250 sc->sc_open = 0; 251 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 252 &sc->sc_encodings) != 0) { 253 aprint_error_dev(self, "couldn't create encodings\n"); 254 return; 255 } 256 257 cv_init(&sc->sc_condvar, device_xname(self)); 258 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_SCHED); 259 260 sc->sc_swvol = 255; 261 sc->sc_buflen = 0; 262 sc->sc_rpos = sc->sc_wpos = 0; 263 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, &sc->sc_dev); 264 265 if (!pmf_device_register(self, NULL, NULL)) 266 aprint_error_dev(self, "couldn't establish power handler\n"); 267 268 return; 269 } 270 271 static int 272 pad_detach(device_t self, int flags) 273 { 274 pad_softc_t *sc = device_private(self); 275 int cmaj, mn, rc; 276 277 cmaj = cdevsw_lookup_major(&pad_cdevsw); 278 mn = device_unit(self); 279 vdevgone(cmaj, mn, mn, VCHR); 280 281 if ((rc = config_detach_children(self, flags)) != 0) 282 return rc; 283 284 pmf_device_deregister(self); 285 286 mutex_destroy(&sc->sc_mutex); 287 cv_destroy(&sc->sc_condvar); 288 289 auconv_delete_encodings(sc->sc_encodings); 290 291 return 0; 292 } 293 294 int 295 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 296 { 297 pad_softc_t *sc; 298 299 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 300 if (sc == NULL) 301 return ENODEV; 302 303 if (sc->sc_open++) { 304 sc->sc_open--; 305 return EBUSY; 306 } 307 308 return 0; 309 } 310 311 int 312 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 313 { 314 pad_softc_t *sc; 315 316 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 317 if (sc == NULL) 318 return ENODEV; 319 320 KASSERT(sc->sc_open > 0); 321 sc->sc_open--; 322 323 return 0; 324 } 325 326 int 327 pad_read(dev_t dev, struct uio *uio, int flags) 328 { 329 pad_softc_t *sc; 330 pad_block_t pb; 331 void (*intr)(void *); 332 void *intrarg; 333 int err; 334 335 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 336 if (sc == NULL) 337 return ENODEV; 338 339 err = 0; 340 341 intr = sc->sc_intr; 342 intrarg = sc->sc_intrarg; 343 344 while (uio->uio_resid > 0 && !err) { 345 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 346 if (!err) 347 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 348 else { 349 if (intr) { 350 (*intr)(intrarg); 351 intr = sc->sc_intr; 352 intrarg = sc->sc_intrarg; 353 err = 0; 354 continue; 355 } 356 357 mutex_enter(&sc->sc_mutex); 358 err = cv_timedwait_sig(&sc->sc_condvar, &sc->sc_mutex, 359 hz/100); 360 if (err != 0 && err != EWOULDBLOCK) { 361 mutex_exit(&sc->sc_mutex); 362 aprint_error_dev(&sc->sc_dev, 363 "cv_timedwait_sig returned %d\n", err); 364 return EINTR; 365 } 366 intr = sc->sc_intr; 367 intrarg = sc->sc_intrarg; 368 mutex_exit(&sc->sc_mutex); 369 err = 0; 370 } 371 } 372 373 if (intr) 374 (*intr)(intrarg); 375 376 return err; 377 } 378 379 static int 380 pad_query_encoding(void *opaque, struct audio_encoding *ae) 381 { 382 pad_softc_t *sc; 383 384 sc = (pad_softc_t *)opaque; 385 386 return auconv_query_encoding(sc->sc_encodings, ae); 387 } 388 389 static int 390 pad_set_params(void *opaque, int setmode, int usemode, 391 audio_params_t *play, audio_params_t *rec, 392 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 393 { 394 pad_softc_t *sc; 395 396 sc = (pad_softc_t *)opaque; 397 398 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 399 play, true, pfil) < 0) 400 return EINVAL; 401 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 402 rec, true, rfil) < 0) 403 return EINVAL; 404 405 if (pfil->req_size > 0) 406 play = &pfil->filters[0].param; 407 switch (play->encoding) { 408 case AUDIO_ENCODING_SLINEAR_LE: 409 if (play->precision == 16 && play->validbits == 16) 410 pfil->prepend(pfil, pad_vol_slinear16_le, play); 411 break; 412 case AUDIO_ENCODING_SLINEAR_BE: 413 if (play->precision == 16 && play->validbits == 16) 414 pfil->prepend(pfil, pad_vol_slinear16_be, play); 415 break; 416 default: 417 break; 418 } 419 420 return 0; 421 } 422 423 static int 424 pad_start_output(void *opaque, void *block, int blksize, 425 void (*intr)(void *), void *intrarg) 426 { 427 pad_softc_t *sc; 428 int err; 429 430 sc = (pad_softc_t *)opaque; 431 432 mutex_enter(&sc->sc_mutex); 433 434 sc->sc_intr = intr; 435 sc->sc_intrarg = intrarg; 436 sc->sc_blksize = blksize; 437 438 err = pad_add_block(sc, block, blksize); 439 440 cv_signal(&sc->sc_condvar); 441 442 mutex_exit(&sc->sc_mutex); 443 444 return err; 445 } 446 447 static int 448 pad_start_input(void *opaque, void *block, int blksize, 449 void (*intr)(void *), void *intrarg) 450 { 451 return EINVAL; 452 } 453 454 static int 455 pad_halt_output(void *opaque) 456 { 457 pad_softc_t *sc; 458 459 sc = (pad_softc_t *)opaque; 460 sc->sc_intr = NULL; 461 sc->sc_intrarg = NULL; 462 sc->sc_buflen = 0; 463 sc->sc_rpos = sc->sc_wpos = 0; 464 465 return 0; 466 } 467 468 static int 469 pad_halt_input(void *opaque) 470 { 471 return 0; 472 } 473 474 static int 475 pad_getdev(void *opaque, struct audio_device *ret) 476 { 477 478 *ret = pad_device; 479 480 return 0; 481 } 482 483 static int 484 pad_set_port(void *opaque, mixer_ctrl_t *mc) 485 { 486 pad_softc_t *sc; 487 488 sc = (pad_softc_t *)opaque; 489 490 switch (mc->dev) { 491 case PAD_OUTPUT_MASTER_VOLUME: 492 case PAD_INPUT_DAC_VOLUME: 493 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 494 return 0; 495 } 496 497 return ENXIO; 498 } 499 500 static int 501 pad_get_port(void *opaque, mixer_ctrl_t *mc) 502 { 503 pad_softc_t *sc; 504 505 sc = (pad_softc_t *)opaque; 506 507 switch (mc->dev) { 508 case PAD_OUTPUT_MASTER_VOLUME: 509 case PAD_INPUT_DAC_VOLUME: 510 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 511 return 0; 512 } 513 514 return ENXIO; 515 } 516 517 static int 518 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 519 { 520 pad_softc_t *sc; 521 522 sc = (pad_softc_t *)opaque; 523 524 switch (di->index) { 525 case PAD_OUTPUT_CLASS: 526 di->mixer_class = PAD_OUTPUT_CLASS; 527 strcpy(di->label.name, AudioCoutputs); 528 di->type = AUDIO_MIXER_CLASS; 529 di->next = di->prev = AUDIO_MIXER_LAST; 530 return 0; 531 case PAD_INPUT_CLASS: 532 di->mixer_class = PAD_INPUT_CLASS; 533 strcpy(di->label.name, AudioCinputs); 534 di->type = AUDIO_MIXER_CLASS; 535 di->next = di->prev = AUDIO_MIXER_LAST; 536 return 0; 537 case PAD_OUTPUT_MASTER_VOLUME: 538 di->mixer_class = PAD_OUTPUT_CLASS; 539 strcpy(di->label.name, AudioNmaster); 540 di->type = AUDIO_MIXER_VALUE; 541 di->next = di->prev = AUDIO_MIXER_LAST; 542 di->un.v.num_channels = 1; 543 strcpy(di->un.v.units.name, AudioNvolume); 544 return 0; 545 case PAD_INPUT_DAC_VOLUME: 546 di->mixer_class = PAD_INPUT_CLASS; 547 strcpy(di->label.name, AudioNdac); 548 di->type = AUDIO_MIXER_VALUE; 549 di->next = di->prev = AUDIO_MIXER_LAST; 550 di->un.v.num_channels = 1; 551 strcpy(di->un.v.units.name, AudioNvolume); 552 return 0; 553 } 554 555 return ENXIO; 556 } 557 558 static int 559 pad_get_props(void *opaque) 560 { 561 return 0; 562 } 563 564 static int 565 pad_round_blocksize(void *opaque, int blksize, int mode, 566 const audio_params_t *p) 567 { 568 return PAD_BLKSIZE; 569 } 570
Indexes created Wed Oct 22 13:09:56 GMT 2025