vidcaudio.c revision 1.26
1 /* $NetBSD: vidcaudio.c,v 1.26 2003/12/31 21:24:47 bjh21 Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Melvin Tang-Richardson 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the RiscBSD team. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 2003 Ben Harris 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. The name of the author may not be used to endorse or promote products 45 * derived from this software without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 */ 58 59 /* 60 * audio driver for the RiscPC 8/16 bit sound 61 * 62 * Interfaces with the NetBSD generic audio driver to provide SUN 63 * /dev/audio (partial) compatibility. 64 */ 65 66 #include <sys/param.h> /* proc.h */ 67 68 __KERNEL_RCSID(0, "$NetBSD: vidcaudio.c,v 1.26 2003/12/31 21:24:47 bjh21 Exp $"); 69 70 #include <sys/audioio.h> 71 #include <sys/conf.h> /* autoconfig functions */ 72 #include <sys/device.h> /* device calls */ 73 #include <sys/errno.h> 74 #include <sys/proc.h> /* device calls */ 75 #include <sys/systm.h> 76 77 #include <uvm/uvm_extern.h> 78 79 #include <dev/audio_if.h> 80 #include <dev/mulaw.h> 81 82 #include <machine/intr.h> 83 #include <arm/arm32/katelib.h> 84 85 #include <arm/iomd/vidcaudiovar.h> 86 #include <arm/iomd/iomdreg.h> 87 #include <arm/iomd/iomdvar.h> 88 #include <arm/iomd/vidc.h> 89 #include <arm/mainbus/mainbus.h> 90 #include <arm/iomd/waveform.h> 91 #include "vidcaudio.h" 92 93 extern int *vidc_base; 94 95 struct vidcaudio_softc { 96 struct device sc_dev; 97 98 irqhandler_t sc_ih; 99 int sc_dma_intr; 100 101 u_int sc_hw_encoding; 102 u_int sc_hw_precision; 103 104 void *sc_pstart; 105 void *sc_pend; 106 size_t sc_pblksize; 107 void *sc_pnext; 108 void (*sc_pintr)(void *); 109 void *sc_parg; 110 int sc_pcountdown; 111 }; 112 113 static int vidcaudio_probe(struct device *, struct cfdata *, void *); 114 static void vidcaudio_attach(struct device *, struct device *, void *); 115 static int vidcaudio_open(void *, int); 116 static void vidcaudio_close(void *); 117 118 static int vidcaudio_intr(void *); 119 static void vidcaudio_rate(int); 120 static void vidcaudio_ctrl(int); 121 static void vidcaudio_stereo(int, int); 122 static void mulaw_to_vidc(void *, u_char *, int); 123 static void mulaw_to_vidc_stereo(void *, u_char *, int); 124 125 CFATTACH_DECL(vidcaudio, sizeof(struct vidcaudio_softc), 126 vidcaudio_probe, vidcaudio_attach, NULL, NULL); 127 128 static int vidcaudio_query_encoding(void *, struct audio_encoding *); 129 static int vidcaudio_set_params(void *, int, int, struct audio_params *, 130 struct audio_params *); 131 static int vidcaudio_round_blocksize(void *, int); 132 static int vidcaudio_trigger_output(void *, void *, void *, int, 133 void (*)(void *), void *, struct audio_params *); 134 static int vidcaudio_trigger_input(void *, void *, void *, int, 135 void (*)(void *), void *, struct audio_params *); 136 static int vidcaudio_halt_output(void *); 137 static int vidcaudio_halt_input(void *); 138 static int vidcaudio_getdev(void *, struct audio_device *); 139 static int vidcaudio_set_port(void *, mixer_ctrl_t *); 140 static int vidcaudio_get_port(void *, mixer_ctrl_t *); 141 static int vidcaudio_query_devinfo(void *, mixer_devinfo_t *); 142 static int vidcaudio_get_props(void *); 143 144 static struct audio_device vidcaudio_device = { 145 "ARM VIDC", 146 "", 147 "vidcaudio" 148 }; 149 150 static struct audio_hw_if vidcaudio_hw_if = { 151 vidcaudio_open, 152 vidcaudio_close, 153 NULL, 154 vidcaudio_query_encoding, 155 vidcaudio_set_params, 156 vidcaudio_round_blocksize, 157 NULL, 158 NULL, 159 NULL, 160 NULL, 161 NULL, 162 vidcaudio_halt_output, 163 vidcaudio_halt_input, 164 NULL, 165 vidcaudio_getdev, 166 NULL, 167 vidcaudio_set_port, 168 vidcaudio_get_port, 169 vidcaudio_query_devinfo, 170 NULL, 171 NULL, 172 NULL, 173 NULL, 174 vidcaudio_get_props, 175 vidcaudio_trigger_output, 176 vidcaudio_trigger_input, 177 NULL, 178 }; 179 180 181 void 182 vidcaudio_beep_generate(void) 183 { 184 185 } 186 187 188 static int 189 vidcaudio_probe(struct device *parent, struct cfdata *cf, void *aux) 190 { 191 int id; 192 193 id = IOMD_ID; 194 195 /* So far I only know about this IOMD */ 196 switch (id) { 197 case RPC600_IOMD_ID: 198 case ARM7500_IOC_ID: 199 case ARM7500FE_IOC_ID: 200 return 1; 201 default: 202 aprint_error("vidcaudio: Unknown IOMD id=%04x", id); 203 return 0; 204 } 205 } 206 207 208 static void 209 vidcaudio_attach(struct device *parent, struct device *self, void *aux) 210 { 211 struct vidcaudio_softc *sc = (void *)self; 212 213 switch (IOMD_ID) { 214 case RPC600_IOMD_ID: 215 sc->sc_hw_encoding = AUDIO_ENCODING_ULAW; 216 sc->sc_hw_precision = 8; 217 sc->sc_dma_intr = IRQ_DMASCH0; 218 aprint_normal(": 8-bit\n"); 219 break; 220 case ARM7500_IOC_ID: 221 case ARM7500FE_IOC_ID: 222 sc->sc_hw_encoding = AUDIO_ENCODING_SLINEAR_LE; 223 sc->sc_hw_precision = 16; 224 sc->sc_dma_intr = IRQ_SDMA; 225 aprint_normal(": 16-bit\n"); 226 break; 227 default: 228 aprint_error(": strange IOMD\n"); 229 return; 230 } 231 232 /* Install the irq handler for the DMA interrupt */ 233 sc->sc_ih.ih_func = vidcaudio_intr; 234 sc->sc_ih.ih_arg = sc; 235 sc->sc_ih.ih_level = IPL_AUDIO; 236 sc->sc_ih.ih_name = self->dv_xname; 237 238 if (irq_claim(sc->sc_dma_intr, &sc->sc_ih) != 0) { 239 aprint_error("%s: couldn't claim IRQ %d\n", 240 self->dv_xname, sc->sc_dma_intr); 241 return; 242 } 243 244 disable_irq(sc->sc_dma_intr); 245 246 audio_attach_mi(&vidcaudio_hw_if, sc, self); 247 } 248 249 static int 250 vidcaudio_open(void *addr, int flags) 251 { 252 253 #ifdef VIDCAUDIO_DEBUG 254 printf("DEBUG: vidcaudio_open called\n"); 255 #endif 256 return 0; 257 } 258 259 static void 260 vidcaudio_close(void *addr) 261 { 262 263 #ifdef VIDCAUDIO_DEBUG 264 printf("DEBUG: vidcaudio_close called\n"); 265 #endif 266 } 267 268 /* 269 * Interface to the generic audio driver 270 */ 271 272 static int 273 vidcaudio_query_encoding(void *addr, struct audio_encoding *fp) 274 { 275 struct vidcaudio_softc *sc = addr; 276 277 switch (fp->index) { 278 case 0: 279 strcpy(fp->name, AudioEmulaw); 280 fp->encoding = AUDIO_ENCODING_ULAW; 281 fp->precision = 8; 282 if (sc->sc_hw_encoding != AUDIO_ENCODING_ULAW) 283 fp->flags = AUDIO_ENCODINGFLAG_EMULATED; 284 else 285 fp->flags = 0; 286 break; 287 288 case 1: 289 if (sc->sc_hw_encoding == AUDIO_ENCODING_SLINEAR_LE) { 290 strcpy(fp->name, AudioEslinear_le); 291 fp->encoding = AUDIO_ENCODING_SLINEAR_LE; 292 fp->precision = 16; 293 fp->flags = 0; 294 break; 295 } 296 /* FALLTHROUGH */ 297 default: 298 return EINVAL; 299 } 300 return 0; 301 } 302 303 #define MULAW_TO_VIDC(m) (~(m) << 1 | (m) >> 7) 304 305 static void 306 mulaw_to_vidc(void *v, u_char *p, int cc) 307 { 308 309 while (--cc >= 0) { 310 *p = MULAW_TO_VIDC(*p); 311 ++p; 312 } 313 } 314 315 static void 316 mulaw_to_vidc_stereo(void *v, u_char *p, int cc) 317 { 318 u_char *q = p; 319 320 p += cc; 321 q += cc * 2; 322 while (--cc >= 0) { 323 q -= 2; 324 --p; 325 q[0] = q[1] = MULAW_TO_VIDC(*p); 326 } 327 } 328 329 static int 330 vidcaudio_set_params(void *addr, int setmode, int usemode, 331 struct audio_params *p, struct audio_params *r) 332 { 333 struct vidcaudio_softc *sc = addr; 334 int sample_period, ch; 335 336 if (setmode & AUMODE_PLAY) { 337 switch (sc->sc_hw_encoding) { 338 case AUDIO_ENCODING_ULAW: 339 /* VIDC20ish, u-law, 8-channel */ 340 if (p->encoding != AUDIO_ENCODING_ULAW || 341 p->precision != 8) 342 return EINVAL; 343 /* 344 * We always use two hardware channels, 345 * because using one at 8kHz gives a nasty 346 * whining sound from the speaker. The 347 * aurateconv mechanism doesn't support ulaw, 348 * so we do the channel duplication ourselves, 349 * and don't try to do rate conversion. 350 */ 351 switch (p->channels) { 352 case 1: 353 p->sw_code = mulaw_to_vidc_stereo; 354 p->factor = 2; p->factor_denom = 1; 355 break; 356 case 2: 357 p->sw_code = mulaw_to_vidc; 358 p->factor = 1; p->factor_denom = 1; 359 break; 360 default: 361 return EINVAL; 362 } 363 p->hw_channels = p->channels; 364 sample_period = 365 1000000 / 2 / p->sample_rate; 366 if (sample_period < 3) sample_period = 3; 367 p->hw_sample_rate = p->sample_rate = 368 1000000 / 2 / sample_period; 369 p->hw_encoding = AUDIO_ENCODING_NONE; 370 p->hw_precision = 8; 371 vidcaudio_rate(sample_period - 2); 372 vidcaudio_ctrl(SCR_SDAC | SCR_CLKSEL); 373 if (p->hw_channels == 1) 374 for (ch = 0; ch < 8; ch++) 375 vidcaudio_stereo(ch, SIR_CENTRE); 376 else 377 for (ch = 0; ch < 8; ch++) 378 vidcaudio_stereo(ch, ch & 1 ? 379 SIR_LEFT_100 : SIR_RIGHT_100); 380 break; 381 382 case AUDIO_ENCODING_SLINEAR_LE: 383 /* ARM7500ish, 16-bit, two-channel */ 384 if (p->encoding == AUDIO_ENCODING_ULAW && 385 p->precision == 8) { 386 p->sw_code = mulaw_to_slinear16_le; 387 p->factor = 2; p->factor_denom = 1; 388 } else if (p->encoding != AUDIO_ENCODING_SLINEAR_LE || 389 p->precision != 16) 390 return EINVAL; 391 p->hw_channels = 2; 392 sample_period = 705600 / 4 / p->sample_rate; 393 if (sample_period < 3) sample_period = 3; 394 p->hw_sample_rate = 395 705600 / 4 / sample_period; 396 vidcaudio_rate(sample_period - 2); 397 vidcaudio_ctrl(SCR_SERIAL); 398 p->hw_encoding = AUDIO_ENCODING_SLINEAR_LE; 399 p->hw_precision = 16; 400 break; 401 } 402 } 403 return 0; 404 } 405 406 static int 407 vidcaudio_round_blocksize(void *addr, int wantblk) 408 { 409 int blk; 410 411 /* 412 * Find the smallest power of two that's larger than the 413 * requested block size, but don't allow < 32 (DMA burst is 16 414 * bytes, and single bursts are tricky) or > PAGE_SIZE (DMA is 415 * confined to a page). 416 */ 417 418 for (blk = 32; blk < PAGE_SIZE; blk <<= 1) 419 if (blk >= wantblk) return blk; 420 return blk; 421 } 422 423 static int 424 vidcaudio_trigger_output(void *addr, void *start, void *end, int blksize, 425 void (*intr)(void *), void *arg, struct audio_params *params) 426 { 427 struct vidcaudio_softc *sc = addr; 428 429 KASSERT(blksize == vidcaudio_round_blocksize(addr, blksize)); 430 431 #ifdef VIDCAUDIO_DEBUG 432 printf("vidcaudio_trigger_output %p-%p/0x%x\n", 433 start, end, blksize); 434 #endif 435 436 sc->sc_pstart = start; 437 sc->sc_pend = end; 438 sc->sc_pblksize = blksize; 439 sc->sc_pnext = start; 440 sc->sc_pintr = intr; 441 sc->sc_parg = arg; 442 443 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 444 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_ENABLE | IOMD_DMACR_QUADWORD); 445 446 /* 447 * Queue up the first two blocks, but don't tell audio code 448 * we're finished with them yet. 449 */ 450 sc->sc_pcountdown = 2; 451 452 enable_irq(sc->sc_dma_intr); 453 454 return 0; 455 } 456 457 static int 458 vidcaudio_trigger_input(void *addr, void *start, void *end, int blksize, 459 void (*intr)(void *), void *arg, struct audio_params *params) 460 { 461 462 return ENODEV; 463 } 464 465 static int 466 vidcaudio_halt_output(void *addr) 467 { 468 struct vidcaudio_softc *sc = addr; 469 470 #ifdef VIDCAUDIO_DEBUG 471 printf("vidcaudio_halt_output\n"); 472 #endif 473 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 474 disable_irq(sc->sc_dma_intr); 475 return 0; 476 } 477 478 static int 479 vidcaudio_halt_input(void *addr) 480 { 481 482 return ENODEV; 483 } 484 485 static int 486 vidcaudio_getdev(void *addr, struct audio_device *retp) 487 { 488 489 *retp = vidcaudio_device; 490 return 0; 491 } 492 493 494 static int 495 vidcaudio_set_port(void *addr, mixer_ctrl_t *cp) 496 { 497 498 return EINVAL; 499 } 500 501 static int 502 vidcaudio_get_port(void *addr, mixer_ctrl_t *cp) 503 { 504 505 return EINVAL; 506 } 507 508 static int 509 vidcaudio_query_devinfo(void *addr, mixer_devinfo_t *dip) 510 { 511 512 return ENXIO; 513 } 514 515 static int 516 vidcaudio_get_props(void *addr) 517 { 518 519 return 0; 520 } 521 522 static void 523 vidcaudio_rate(int rate) 524 { 525 526 WriteWord(vidc_base, VIDC_SFR | rate); 527 } 528 529 static void 530 vidcaudio_ctrl(int ctrl) 531 { 532 533 WriteWord(vidc_base, VIDC_SCR | ctrl); 534 } 535 536 static void 537 vidcaudio_stereo(int channel, int position) 538 { 539 540 channel = channel << 24 | VIDC_SIR0; 541 WriteWord(vidc_base, channel | position); 542 } 543 544 static int 545 vidcaudio_intr(void *arg) 546 { 547 struct vidcaudio_softc *sc = arg; 548 int status; 549 paddr_t pnext, pend; 550 551 status = IOMD_READ_BYTE(IOMD_SD0ST); 552 #ifdef VIDCAUDIO_DEBUG 553 printf ( "I[%x]", status ); 554 #endif 555 if ((status & IOMD_DMAST_INT) == 0) 556 return 0; 557 558 /* FIXME: Not really allowed to use pmap here. */ 559 pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_pnext, &pnext); 560 pend = (pnext + sc->sc_pblksize - 16) & IOMD_DMAEND_OFFSET; 561 562 switch (status & 563 (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB)) { 564 565 case (IOMD_DMAST_INT | IOMD_DMAST_BANKA): 566 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB): 567 #ifdef VIDCAUDIO_DEBUG 568 printf("B<0x%08lx,0x%03lx>", pnext, pend); 569 #endif 570 IOMD_WRITE_WORD(IOMD_SD0CURB, pnext); 571 IOMD_WRITE_WORD(IOMD_SD0ENDB, pend); 572 break; 573 574 case (IOMD_DMAST_INT | IOMD_DMAST_BANKB): 575 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKA): 576 #ifdef VIDCAUDIO_DEBUG 577 printf("A<0x%08lx,0x%03lx>", pnext, pend); 578 #endif 579 IOMD_WRITE_WORD(IOMD_SD0CURA, pnext); 580 IOMD_WRITE_WORD(IOMD_SD0ENDA, pend); 581 break; 582 } 583 584 sc->sc_pnext = (char *)sc->sc_pnext + sc->sc_pblksize; 585 if (sc->sc_pnext >= sc->sc_pend) 586 sc->sc_pnext = sc->sc_pstart; 587 588 if (sc->sc_pcountdown > 0) 589 sc->sc_pcountdown--; 590 else 591 (*sc->sc_pintr)(sc->sc_parg); 592 593 return 1; 594 } 595
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