pad.c revision 1.8
1 /* $NetBSD: pad.c,v 1.8 2008/06/08 18:14:31 tsutsui 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 1.8 2008/06/08 18:14:31 tsutsui 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 KASSERT(sc->sc_audiodev->dev == child); 241 sc->sc_audiodev = NULL; 242 } 243 244 static void 245 pad_attach(device_t parent, device_t self, void *opaque) 246 { 247 pad_softc_t *sc = device_private(self); 248 249 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 250 251 sc->sc_open = 0; 252 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 253 &sc->sc_encodings) != 0) { 254 aprint_error_dev(self, "couldn't create encodings\n"); 255 return; 256 } 257 258 cv_init(&sc->sc_condvar, device_xname(self)); 259 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_SCHED); 260 261 sc->sc_swvol = 255; 262 sc->sc_buflen = 0; 263 sc->sc_rpos = sc->sc_wpos = 0; 264 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, &sc->sc_dev); 265 266 if (!pmf_device_register(self, NULL, NULL)) 267 aprint_error_dev(self, "couldn't establish power handler\n"); 268 269 return; 270 } 271 272 static int 273 pad_detach(device_t self, int flags) 274 { 275 pad_softc_t *sc = device_private(self); 276 int cmaj, mn, rc; 277 278 cmaj = cdevsw_lookup_major(&pad_cdevsw); 279 mn = device_unit(self); 280 vdevgone(cmaj, mn, mn, VCHR); 281 282 if ((rc = config_detach_children(self, flags)) != 0) 283 return rc; 284 285 pmf_device_deregister(self); 286 287 mutex_destroy(&sc->sc_mutex); 288 cv_destroy(&sc->sc_condvar); 289 290 auconv_delete_encodings(sc->sc_encodings); 291 292 return 0; 293 } 294 295 int 296 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 297 { 298 pad_softc_t *sc; 299 300 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 301 if (sc == NULL) 302 return ENODEV; 303 304 if (sc->sc_open++) { 305 sc->sc_open--; 306 return EBUSY; 307 } 308 309 return 0; 310 } 311 312 int 313 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 314 { 315 pad_softc_t *sc; 316 317 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 318 if (sc == NULL) 319 return ENODEV; 320 321 KASSERT(sc->sc_open > 0); 322 sc->sc_open--; 323 324 return 0; 325 } 326 327 int 328 pad_read(dev_t dev, struct uio *uio, int flags) 329 { 330 pad_softc_t *sc; 331 pad_block_t pb; 332 void (*intr)(void *); 333 void *intrarg; 334 int err; 335 336 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 337 if (sc == NULL) 338 return ENODEV; 339 340 err = 0; 341 342 intr = sc->sc_intr; 343 intrarg = sc->sc_intrarg; 344 345 while (uio->uio_resid > 0 && !err) { 346 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 347 if (!err) 348 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 349 else { 350 if (intr) { 351 (*intr)(intrarg); 352 intr = sc->sc_intr; 353 intrarg = sc->sc_intrarg; 354 err = 0; 355 continue; 356 } 357 358 mutex_enter(&sc->sc_mutex); 359 err = cv_timedwait_sig(&sc->sc_condvar, &sc->sc_mutex, 360 hz/100); 361 if (err != 0 && err != EWOULDBLOCK) { 362 mutex_exit(&sc->sc_mutex); 363 aprint_error_dev(&sc->sc_dev, 364 "cv_timedwait_sig returned %d\n", err); 365 return EINTR; 366 } 367 intr = sc->sc_intr; 368 intrarg = sc->sc_intrarg; 369 mutex_exit(&sc->sc_mutex); 370 err = 0; 371 } 372 } 373 374 if (intr) 375 (*intr)(intrarg); 376 377 return err; 378 } 379 380 static int 381 pad_query_encoding(void *opaque, struct audio_encoding *ae) 382 { 383 pad_softc_t *sc; 384 385 sc = (pad_softc_t *)opaque; 386 387 return auconv_query_encoding(sc->sc_encodings, ae); 388 } 389 390 static int 391 pad_set_params(void *opaque, int setmode, int usemode, 392 audio_params_t *play, audio_params_t *rec, 393 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 394 { 395 pad_softc_t *sc; 396 397 sc = (pad_softc_t *)opaque; 398 399 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 400 play, true, pfil) < 0) 401 return EINVAL; 402 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 403 rec, true, rfil) < 0) 404 return EINVAL; 405 406 if (pfil->req_size > 0) 407 play = &pfil->filters[0].param; 408 switch (play->encoding) { 409 case AUDIO_ENCODING_SLINEAR_LE: 410 if (play->precision == 16 && play->validbits == 16) 411 pfil->prepend(pfil, pad_vol_slinear16_le, play); 412 break; 413 case AUDIO_ENCODING_SLINEAR_BE: 414 if (play->precision == 16 && play->validbits == 16) 415 pfil->prepend(pfil, pad_vol_slinear16_be, play); 416 break; 417 default: 418 break; 419 } 420 421 return 0; 422 } 423 424 static int 425 pad_start_output(void *opaque, void *block, int blksize, 426 void (*intr)(void *), void *intrarg) 427 { 428 pad_softc_t *sc; 429 int err; 430 431 sc = (pad_softc_t *)opaque; 432 433 mutex_enter(&sc->sc_mutex); 434 435 sc->sc_intr = intr; 436 sc->sc_intrarg = intrarg; 437 sc->sc_blksize = blksize; 438 439 err = pad_add_block(sc, block, blksize); 440 441 cv_signal(&sc->sc_condvar); 442 443 mutex_exit(&sc->sc_mutex); 444 445 return err; 446 } 447 448 static int 449 pad_start_input(void *opaque, void *block, int blksize, 450 void (*intr)(void *), void *intrarg) 451 { 452 return EINVAL; 453 } 454 455 static int 456 pad_halt_output(void *opaque) 457 { 458 pad_softc_t *sc; 459 460 sc = (pad_softc_t *)opaque; 461 sc->sc_intr = NULL; 462 sc->sc_intrarg = NULL; 463 sc->sc_buflen = 0; 464 sc->sc_rpos = sc->sc_wpos = 0; 465 466 return 0; 467 } 468 469 static int 470 pad_halt_input(void *opaque) 471 { 472 return 0; 473 } 474 475 static int 476 pad_getdev(void *opaque, struct audio_device *ret) 477 { 478 479 *ret = pad_device; 480 481 return 0; 482 } 483 484 static int 485 pad_set_port(void *opaque, mixer_ctrl_t *mc) 486 { 487 pad_softc_t *sc; 488 489 sc = (pad_softc_t *)opaque; 490 491 switch (mc->dev) { 492 case PAD_OUTPUT_MASTER_VOLUME: 493 case PAD_INPUT_DAC_VOLUME: 494 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 495 return 0; 496 } 497 498 return ENXIO; 499 } 500 501 static int 502 pad_get_port(void *opaque, mixer_ctrl_t *mc) 503 { 504 pad_softc_t *sc; 505 506 sc = (pad_softc_t *)opaque; 507 508 switch (mc->dev) { 509 case PAD_OUTPUT_MASTER_VOLUME: 510 case PAD_INPUT_DAC_VOLUME: 511 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 512 return 0; 513 } 514 515 return ENXIO; 516 } 517 518 static int 519 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 520 { 521 pad_softc_t *sc; 522 523 sc = (pad_softc_t *)opaque; 524 525 switch (di->index) { 526 case PAD_OUTPUT_CLASS: 527 di->mixer_class = PAD_OUTPUT_CLASS; 528 strcpy(di->label.name, AudioCoutputs); 529 di->type = AUDIO_MIXER_CLASS; 530 di->next = di->prev = AUDIO_MIXER_LAST; 531 return 0; 532 case PAD_INPUT_CLASS: 533 di->mixer_class = PAD_INPUT_CLASS; 534 strcpy(di->label.name, AudioCinputs); 535 di->type = AUDIO_MIXER_CLASS; 536 di->next = di->prev = AUDIO_MIXER_LAST; 537 return 0; 538 case PAD_OUTPUT_MASTER_VOLUME: 539 di->mixer_class = PAD_OUTPUT_CLASS; 540 strcpy(di->label.name, AudioNmaster); 541 di->type = AUDIO_MIXER_VALUE; 542 di->next = di->prev = AUDIO_MIXER_LAST; 543 di->un.v.num_channels = 1; 544 strcpy(di->un.v.units.name, AudioNvolume); 545 return 0; 546 case PAD_INPUT_DAC_VOLUME: 547 di->mixer_class = PAD_INPUT_CLASS; 548 strcpy(di->label.name, AudioNdac); 549 di->type = AUDIO_MIXER_VALUE; 550 di->next = di->prev = AUDIO_MIXER_LAST; 551 di->un.v.num_channels = 1; 552 strcpy(di->un.v.units.name, AudioNvolume); 553 return 0; 554 } 555 556 return ENXIO; 557 } 558 559 static int 560 pad_get_props(void *opaque) 561 { 562 return 0; 563 } 564 565 static int 566 pad_round_blocksize(void *opaque, int blksize, int mode, 567 const audio_params_t *p) 568 { 569 return PAD_BLKSIZE; 570 } 571
Indexes created Thu Oct 02 14:10:14 GMT 2025