pad.c revision 1.6.4.1
1 /* $NetBSD: pad.c,v 1.6.4.1 2008/05/16 02:24:42 yamt 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 1.6.4.1 2008/05/16 02:24:42 yamt 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 pad_softc_t * pad_find_softc(dev_t); 121 static int pad_add_block(pad_softc_t *, uint8_t *, int); 122 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 123 124 dev_type_open(pad_open); 125 dev_type_close(pad_close); 126 dev_type_read(pad_read); 127 128 const struct cdevsw pad_cdevsw = { 129 .d_open = pad_open, 130 .d_close = pad_close, 131 .d_read = pad_read, 132 .d_write = nowrite, 133 .d_ioctl = noioctl, 134 .d_stop = nostop, 135 .d_tty = notty, 136 .d_poll = nopoll, 137 .d_mmap = nommap, 138 .d_kqfilter = nokqfilter, 139 .d_flag = D_OTHER, 140 }; 141 142 CFATTACH_DECL2(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 143 NULL, NULL, pad_childdet); 144 145 void 146 padattach(int n) 147 { 148 int i, err; 149 struct cfdata *cf; 150 151 #ifdef DEBUG 152 printf("pad: requested %d units\n", n); 153 #endif 154 155 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 156 if (err) { 157 aprint_error("%s: couldn't register cfattach: %d\n", 158 pad_cd.cd_name, err); 159 config_cfdriver_detach(&pad_cd); 160 return; 161 } 162 163 for (i = 0; i < n; i++) { 164 cf = kmem_alloc(sizeof(struct cfdata), KM_NOSLEEP); 165 if (cf == NULL) { 166 aprint_error("%s: couldn't allocate cfdata\n", 167 pad_cd.cd_name); 168 continue; 169 } 170 cf->cf_name = pad_cd.cd_name; 171 cf->cf_atname = pad_cd.cd_name; 172 cf->cf_unit = i; 173 cf->cf_fstate = FSTATE_STAR; 174 175 (void)config_attach_pseudo(cf); 176 } 177 178 return; 179 } 180 181 static pad_softc_t * 182 pad_find_softc(dev_t dev) 183 { 184 int unit; 185 186 unit = PADUNIT(dev); 187 if (unit >= pad_cd.cd_ndevs) 188 return NULL; 189 190 return pad_cd.cd_devs[unit]; 191 } 192 193 static int 194 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 195 { 196 int l; 197 198 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 199 return ENOBUFS; 200 201 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 202 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 203 else { 204 l = PAD_BUFSIZE - sc->sc_wpos; 205 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 206 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 207 } 208 209 sc->sc_wpos += blksize; 210 if (sc->sc_wpos > PAD_BUFSIZE) 211 sc->sc_wpos -= PAD_BUFSIZE; 212 213 sc->sc_buflen += blksize; 214 215 return 0; 216 } 217 218 static int 219 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 220 { 221 int l; 222 223 KASSERT(pb != NULL); 224 225 if (sc->sc_buflen < blksize) 226 return ERESTART; 227 228 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 229 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 230 pb->pb_len = blksize; 231 sc->sc_rpos += blksize; 232 } else { 233 l = PAD_BUFSIZE - sc->sc_rpos; 234 pb->pb_len = l; 235 sc->sc_rpos = 0; 236 } 237 sc->sc_buflen -= pb->pb_len; 238 239 return 0; 240 } 241 242 static int 243 pad_match(device_t parent, struct cfdata *data, void *opaque) 244 { 245 return 1; 246 } 247 248 static void 249 pad_childdet(device_t self, device_t child) 250 { 251 pad_softc_t *sc = device_private(self); 252 253 KASSERT(sc->sc_audiodev->dev == child); 254 sc->sc_audiodev = NULL; 255 } 256 257 static void 258 pad_attach(device_t parent, device_t self, void *opaque) 259 { 260 pad_softc_t *sc = device_private(self); 261 262 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 263 264 sc->sc_open = 0; 265 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 266 &sc->sc_encodings) != 0) { 267 aprint_error_dev(self, "couldn't create encodings\n"); 268 return; 269 } 270 271 cv_init(&sc->sc_condvar, device_xname(self)); 272 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_SCHED); 273 274 sc->sc_swvol = 255; 275 sc->sc_buflen = 0; 276 sc->sc_rpos = sc->sc_wpos = 0; 277 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, &sc->sc_dev); 278 279 if (!pmf_device_register(self, NULL, NULL)) 280 aprint_error_dev(self, "couldn't establish power handler\n"); 281 282 return; 283 } 284 285 static int 286 pad_detach(device_t self, int flags) 287 { 288 pad_softc_t *sc = device_private(self); 289 int cmaj, mn, rc; 290 291 cmaj = cdevsw_lookup_major(&pad_cdevsw); 292 mn = device_unit(self); 293 vdevgone(cmaj, mn, mn, VCHR); 294 295 if ((rc = config_detach_children(self, flags)) != 0) 296 return rc; 297 298 pmf_device_deregister(self); 299 300 mutex_destroy(&sc->sc_mutex); 301 cv_destroy(&sc->sc_condvar); 302 303 auconv_delete_encodings(sc->sc_encodings); 304 305 return 0; 306 } 307 308 int 309 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 310 { 311 pad_softc_t *sc; 312 313 sc = pad_find_softc(dev); 314 if (sc == NULL) 315 return ENODEV; 316 317 if (sc->sc_open++) { 318 sc->sc_open--; 319 return EBUSY; 320 } 321 322 return 0; 323 } 324 325 int 326 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 327 { 328 pad_softc_t *sc; 329 330 sc = pad_find_softc(dev); 331 if (sc == NULL) 332 return ENODEV; 333 334 KASSERT(sc->sc_open > 0); 335 sc->sc_open--; 336 337 return 0; 338 } 339 340 int 341 pad_read(dev_t dev, struct uio *uio, int flags) 342 { 343 pad_softc_t *sc; 344 pad_block_t pb; 345 void (*intr)(void *); 346 void *intrarg; 347 int err; 348 349 sc = pad_find_softc(dev); 350 if (sc == NULL) 351 return ENODEV; 352 353 err = 0; 354 355 intr = sc->sc_intr; 356 intrarg = sc->sc_intrarg; 357 358 while (uio->uio_resid > 0 && !err) { 359 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 360 if (!err) 361 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 362 else { 363 if (intr) { 364 (*intr)(intrarg); 365 intr = sc->sc_intr; 366 intrarg = sc->sc_intrarg; 367 err = 0; 368 continue; 369 } 370 371 mutex_enter(&sc->sc_mutex); 372 err = cv_timedwait_sig(&sc->sc_condvar, &sc->sc_mutex, 373 hz/100); 374 if (err != 0 && err != EWOULDBLOCK) { 375 mutex_exit(&sc->sc_mutex); 376 aprint_error_dev(&sc->sc_dev, 377 "cv_timedwait_sig returned %d\n", err); 378 return EINTR; 379 } 380 intr = sc->sc_intr; 381 intrarg = sc->sc_intrarg; 382 mutex_exit(&sc->sc_mutex); 383 err = 0; 384 } 385 } 386 387 if (intr) 388 (*intr)(intrarg); 389 390 return err; 391 } 392 393 static int 394 pad_query_encoding(void *opaque, struct audio_encoding *ae) 395 { 396 pad_softc_t *sc; 397 398 sc = (pad_softc_t *)opaque; 399 400 return auconv_query_encoding(sc->sc_encodings, ae); 401 } 402 403 static int 404 pad_set_params(void *opaque, int setmode, int usemode, 405 audio_params_t *play, audio_params_t *rec, 406 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 407 { 408 pad_softc_t *sc; 409 410 sc = (pad_softc_t *)opaque; 411 412 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 413 play, true, pfil) < 0) 414 return EINVAL; 415 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 416 rec, true, rfil) < 0) 417 return EINVAL; 418 419 if (pfil->req_size > 0) 420 play = &pfil->filters[0].param; 421 switch (play->encoding) { 422 case AUDIO_ENCODING_SLINEAR_LE: 423 if (play->precision == 16 && play->validbits == 16) 424 pfil->prepend(pfil, pad_vol_slinear16_le, play); 425 break; 426 case AUDIO_ENCODING_SLINEAR_BE: 427 if (play->precision == 16 && play->validbits == 16) 428 pfil->prepend(pfil, pad_vol_slinear16_be, play); 429 break; 430 default: 431 break; 432 } 433 434 return 0; 435 } 436 437 static int 438 pad_start_output(void *opaque, void *block, int blksize, 439 void (*intr)(void *), void *intrarg) 440 { 441 pad_softc_t *sc; 442 int err; 443 444 sc = (pad_softc_t *)opaque; 445 446 mutex_enter(&sc->sc_mutex); 447 448 sc->sc_intr = intr; 449 sc->sc_intrarg = intrarg; 450 sc->sc_blksize = blksize; 451 452 err = pad_add_block(sc, block, blksize); 453 454 cv_signal(&sc->sc_condvar); 455 456 mutex_exit(&sc->sc_mutex); 457 458 return err; 459 } 460 461 static int 462 pad_start_input(void *opaque, void *block, int blksize, 463 void (*intr)(void *), void *intrarg) 464 { 465 return EINVAL; 466 } 467 468 static int 469 pad_halt_output(void *opaque) 470 { 471 pad_softc_t *sc; 472 473 sc = (pad_softc_t *)opaque; 474 sc->sc_intr = NULL; 475 sc->sc_intrarg = NULL; 476 sc->sc_buflen = 0; 477 sc->sc_rpos = sc->sc_wpos = 0; 478 479 return 0; 480 } 481 482 static int 483 pad_halt_input(void *opaque) 484 { 485 return 0; 486 } 487 488 static int 489 pad_getdev(void *opaque, struct audio_device *ret) 490 { 491 492 *ret = pad_device; 493 494 return 0; 495 } 496 497 static int 498 pad_set_port(void *opaque, mixer_ctrl_t *mc) 499 { 500 pad_softc_t *sc; 501 502 sc = (pad_softc_t *)opaque; 503 504 switch (mc->dev) { 505 case PAD_OUTPUT_MASTER_VOLUME: 506 case PAD_INPUT_DAC_VOLUME: 507 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 508 return 0; 509 } 510 511 return ENXIO; 512 } 513 514 static int 515 pad_get_port(void *opaque, mixer_ctrl_t *mc) 516 { 517 pad_softc_t *sc; 518 519 sc = (pad_softc_t *)opaque; 520 521 switch (mc->dev) { 522 case PAD_OUTPUT_MASTER_VOLUME: 523 case PAD_INPUT_DAC_VOLUME: 524 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 525 return 0; 526 } 527 528 return ENXIO; 529 } 530 531 static int 532 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 533 { 534 pad_softc_t *sc; 535 536 sc = (pad_softc_t *)opaque; 537 538 switch (di->index) { 539 case PAD_OUTPUT_CLASS: 540 di->mixer_class = PAD_OUTPUT_CLASS; 541 strcpy(di->label.name, AudioCoutputs); 542 di->type = AUDIO_MIXER_CLASS; 543 di->next = di->prev = AUDIO_MIXER_LAST; 544 return 0; 545 case PAD_INPUT_CLASS: 546 di->mixer_class = PAD_INPUT_CLASS; 547 strcpy(di->label.name, AudioCinputs); 548 di->type = AUDIO_MIXER_CLASS; 549 di->next = di->prev = AUDIO_MIXER_LAST; 550 return 0; 551 case PAD_OUTPUT_MASTER_VOLUME: 552 di->mixer_class = PAD_OUTPUT_CLASS; 553 strcpy(di->label.name, AudioNmaster); 554 di->type = AUDIO_MIXER_VALUE; 555 di->next = di->prev = AUDIO_MIXER_LAST; 556 di->un.v.num_channels = 1; 557 strcpy(di->un.v.units.name, AudioNvolume); 558 return 0; 559 case PAD_INPUT_DAC_VOLUME: 560 di->mixer_class = PAD_INPUT_CLASS; 561 strcpy(di->label.name, AudioNdac); 562 di->type = AUDIO_MIXER_VALUE; 563 di->next = di->prev = AUDIO_MIXER_LAST; 564 di->un.v.num_channels = 1; 565 strcpy(di->un.v.units.name, AudioNvolume); 566 return 0; 567 } 568 569 return ENXIO; 570 } 571 572 static int 573 pad_get_props(void *opaque) 574 { 575 return 0; 576 } 577 578 static int 579 pad_round_blocksize(void *opaque, int blksize, int mode, 580 const audio_params_t *p) 581 { 582 return PAD_BLKSIZE; 583 } 584
Indexes created Fri Oct 17 03:10:13 GMT 2025