vidcaudio.c revision 1.31
1 /* $NetBSD: vidcaudio.c,v 1.31 2004/01/01 18:07:58 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 1.31 2004/01/01 18:07:58 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/malloc.h> 75 #include <sys/proc.h> /* device calls */ 76 #include <sys/systm.h> 77 78 #include <uvm/uvm_extern.h> 79 80 #include <dev/audio_if.h> 81 #include <dev/mulaw.h> 82 83 #include <machine/intr.h> 84 #include <machine/machdep.h> 85 #include <arm/arm32/katelib.h> 86 87 #include <arm/iomd/vidcaudiovar.h> 88 #include <arm/iomd/iomdreg.h> 89 #include <arm/iomd/iomdvar.h> 90 #include <arm/iomd/vidc.h> 91 #include <arm/mainbus/mainbus.h> 92 #include <arm/iomd/waveform.h> 93 94 extern int *vidc_base; 95 96 #ifdef VIDCAUDIO_DEBUG 97 #define DPRINTF(x) printf x 98 #else 99 #define DPRINTF(x) 100 #endif 101 102 struct vidcaudio_softc { 103 struct device sc_dev; 104 105 irqhandler_t sc_ih; 106 int sc_dma_intr; 107 108 int sc_is16bit; 109 110 size_t sc_pblksize; 111 vm_offset_t sc_poffset; 112 vm_offset_t sc_pbufsize; 113 paddr_t *sc_ppages; 114 void (*sc_pintr)(void *); 115 void *sc_parg; 116 int sc_pcountdown; 117 }; 118 119 static int vidcaudio_probe(struct device *, struct cfdata *, void *); 120 static void vidcaudio_attach(struct device *, struct device *, void *); 121 static int vidcaudio_open(void *, int); 122 static void vidcaudio_close(void *); 123 124 static int vidcaudio_intr(void *); 125 static void vidcaudio_rate(int); 126 static void vidcaudio_ctrl(int); 127 static void vidcaudio_stereo(int, int); 128 static void mulaw_to_vidc(void *, u_char *, int); 129 static void mulaw_to_vidc_stereo(void *, u_char *, int); 130 131 CFATTACH_DECL(vidcaudio, sizeof(struct vidcaudio_softc), 132 vidcaudio_probe, vidcaudio_attach, NULL, NULL); 133 134 static int vidcaudio_query_encoding(void *, struct audio_encoding *); 135 static int vidcaudio_set_params(void *, int, int, struct audio_params *, 136 struct audio_params *); 137 static int vidcaudio_round_blocksize(void *, int); 138 static int vidcaudio_trigger_output(void *, void *, void *, int, 139 void (*)(void *), void *, struct audio_params *); 140 static int vidcaudio_trigger_input(void *, void *, void *, int, 141 void (*)(void *), void *, struct audio_params *); 142 static int vidcaudio_halt_output(void *); 143 static int vidcaudio_halt_input(void *); 144 static int vidcaudio_getdev(void *, struct audio_device *); 145 static int vidcaudio_set_port(void *, mixer_ctrl_t *); 146 static int vidcaudio_get_port(void *, mixer_ctrl_t *); 147 static int vidcaudio_query_devinfo(void *, mixer_devinfo_t *); 148 static int vidcaudio_get_props(void *); 149 150 static struct audio_device vidcaudio_device = { 151 "ARM VIDC", 152 "", 153 "vidcaudio" 154 }; 155 156 static struct audio_hw_if vidcaudio_hw_if = { 157 vidcaudio_open, 158 vidcaudio_close, 159 NULL, 160 vidcaudio_query_encoding, 161 vidcaudio_set_params, 162 vidcaudio_round_blocksize, 163 NULL, 164 NULL, 165 NULL, 166 NULL, 167 NULL, 168 vidcaudio_halt_output, 169 vidcaudio_halt_input, 170 NULL, 171 vidcaudio_getdev, 172 NULL, 173 vidcaudio_set_port, 174 vidcaudio_get_port, 175 vidcaudio_query_devinfo, 176 NULL, 177 NULL, 178 NULL, 179 NULL, 180 vidcaudio_get_props, 181 vidcaudio_trigger_output, 182 vidcaudio_trigger_input, 183 NULL, 184 }; 185 186 187 void 188 vidcaudio_beep_generate(void) 189 { 190 191 } 192 193 194 static int 195 vidcaudio_probe(struct device *parent, struct cfdata *cf, void *aux) 196 { 197 int id; 198 199 id = IOMD_ID; 200 201 /* So far I only know about this IOMD */ 202 switch (id) { 203 case RPC600_IOMD_ID: 204 case ARM7500_IOC_ID: 205 case ARM7500FE_IOC_ID: 206 return 1; 207 default: 208 aprint_error("vidcaudio: Unknown IOMD id=%04x", id); 209 return 0; 210 } 211 } 212 213 214 static void 215 vidcaudio_attach(struct device *parent, struct device *self, void *aux) 216 { 217 struct vidcaudio_softc *sc = (void *)self; 218 219 switch (IOMD_ID) { 220 case RPC600_IOMD_ID: 221 sc->sc_is16bit = (cmos_read(0xc4) >> 5) & 1; 222 sc->sc_dma_intr = IRQ_DMASCH0; 223 break; 224 case ARM7500_IOC_ID: 225 case ARM7500FE_IOC_ID: 226 sc->sc_is16bit = TRUE; 227 sc->sc_dma_intr = IRQ_SDMA; 228 break; 229 default: 230 aprint_error(": strange IOMD\n"); 231 return; 232 } 233 234 if (sc->sc_is16bit) 235 aprint_normal(": 16-bit external DAC\n"); 236 else 237 aprint_normal(": 8-bit internal DAC\n"); 238 239 /* Install the irq handler for the DMA interrupt */ 240 sc->sc_ih.ih_func = vidcaudio_intr; 241 sc->sc_ih.ih_arg = sc; 242 sc->sc_ih.ih_level = IPL_AUDIO; 243 sc->sc_ih.ih_name = self->dv_xname; 244 245 if (irq_claim(sc->sc_dma_intr, &sc->sc_ih) != 0) { 246 aprint_error("%s: couldn't claim IRQ %d\n", 247 self->dv_xname, sc->sc_dma_intr); 248 return; 249 } 250 251 disable_irq(sc->sc_dma_intr); 252 253 audio_attach_mi(&vidcaudio_hw_if, sc, self); 254 } 255 256 static int 257 vidcaudio_open(void *addr, int flags) 258 { 259 260 DPRINTF(("DEBUG: vidcaudio_open called\n")); 261 return 0; 262 } 263 264 static void 265 vidcaudio_close(void *addr) 266 { 267 struct vidcaudio_softc *sc = addr; 268 269 DPRINTF(("DEBUG: vidcaudio_close called\n")); 270 /* 271 * We do this here rather than in vidcaudio_halt_output() 272 * because the latter can be called from interrupt context 273 * (audio_pint()->audio_clear()->vidcaudio_halt_output()). 274 */ 275 if (sc->sc_ppages != NULL) { 276 free(sc->sc_ppages, M_DEVBUF); 277 sc->sc_ppages = NULL; 278 } 279 } 280 281 /* 282 * Interface to the generic audio driver 283 */ 284 285 static int 286 vidcaudio_query_encoding(void *addr, struct audio_encoding *fp) 287 { 288 struct vidcaudio_softc *sc = addr; 289 290 switch (fp->index) { 291 case 0: 292 strcpy(fp->name, AudioEmulaw); 293 fp->encoding = AUDIO_ENCODING_ULAW; 294 fp->precision = 8; 295 fp->flags = AUDIO_ENCODINGFLAG_EMULATED; 296 break; 297 298 case 1: 299 if (sc->sc_is16bit) { 300 strcpy(fp->name, AudioEslinear_le); 301 fp->encoding = AUDIO_ENCODING_SLINEAR_LE; 302 fp->precision = 16; 303 fp->flags = 0; 304 break; 305 } 306 /* FALLTHROUGH */ 307 default: 308 return EINVAL; 309 } 310 return 0; 311 } 312 313 #define MULAW_TO_VIDC(m) (~(m) << 1 | (m) >> 7) 314 315 static void 316 mulaw_to_vidc(void *v, u_char *p, int cc) 317 { 318 319 while (--cc >= 0) { 320 *p = MULAW_TO_VIDC(*p); 321 ++p; 322 } 323 } 324 325 static void 326 mulaw_to_vidc_stereo(void *v, u_char *p, int cc) 327 { 328 u_char *q = p; 329 330 p += cc; 331 q += cc * 2; 332 while (--cc >= 0) { 333 q -= 2; 334 --p; 335 q[0] = q[1] = MULAW_TO_VIDC(*p); 336 } 337 } 338 339 static int 340 vidcaudio_set_params(void *addr, int setmode, int usemode, 341 struct audio_params *p, struct audio_params *r) 342 { 343 struct vidcaudio_softc *sc = addr; 344 int sample_period, ch; 345 346 if (setmode & AUMODE_PLAY) { 347 if (sc->sc_is16bit) { 348 /* ARM7500ish, 16-bit, two-channel */ 349 if (p->encoding == AUDIO_ENCODING_ULAW && 350 p->precision == 8) { 351 p->sw_code = mulaw_to_slinear16_le; 352 p->factor = 2; p->factor_denom = 1; 353 } else if (p->encoding != AUDIO_ENCODING_SLINEAR_LE || 354 p->precision != 16) 355 return EINVAL; 356 p->hw_channels = 2; 357 sample_period = 705600 / 4 / p->sample_rate; 358 if (sample_period < 3) sample_period = 3; 359 p->hw_sample_rate = 360 705600 / 4 / sample_period; 361 vidcaudio_rate(sample_period - 2); 362 vidcaudio_ctrl(SCR_SERIAL); 363 p->hw_encoding = AUDIO_ENCODING_SLINEAR_LE; 364 p->hw_precision = 16; 365 } else { 366 /* VIDC20ish, u-law, 8-channel */ 367 if (p->encoding != AUDIO_ENCODING_ULAW || 368 p->precision != 8) 369 return EINVAL; 370 /* 371 * We always use two hardware channels, 372 * because using one at 8kHz gives a nasty 373 * whining sound from the speaker. The 374 * aurateconv mechanism doesn't support ulaw, 375 * so we do the channel duplication ourselves, 376 * and don't try to do rate conversion. 377 */ 378 switch (p->channels) { 379 case 1: 380 p->sw_code = mulaw_to_vidc_stereo; 381 p->factor = 2; p->factor_denom = 1; 382 break; 383 case 2: 384 p->sw_code = mulaw_to_vidc; 385 p->factor = 1; p->factor_denom = 1; 386 break; 387 default: 388 return EINVAL; 389 } 390 p->hw_channels = p->channels; 391 sample_period = 392 1000000 / 2 / p->sample_rate; 393 if (sample_period < 3) sample_period = 3; 394 p->hw_sample_rate = p->sample_rate = 395 1000000 / 2 / sample_period; 396 p->hw_encoding = AUDIO_ENCODING_NONE; 397 p->hw_precision = 8; 398 vidcaudio_rate(sample_period - 2); 399 vidcaudio_ctrl(SCR_SDAC | SCR_CLKSEL); 400 if (p->hw_channels == 1) 401 for (ch = 0; ch < 8; ch++) 402 vidcaudio_stereo(ch, SIR_CENTRE); 403 else 404 for (ch = 0; ch < 8; ch++) 405 vidcaudio_stereo(ch, ch & 1 ? 406 SIR_LEFT_100 : SIR_RIGHT_100); 407 } 408 } 409 return 0; 410 } 411 412 static int 413 vidcaudio_round_blocksize(void *addr, int wantblk) 414 { 415 int blk; 416 417 /* 418 * Find the smallest power of two that's larger than the 419 * requested block size, but don't allow < 32 (DMA burst is 16 420 * bytes, and single bursts are tricky) or > PAGE_SIZE (DMA is 421 * confined to a page). 422 */ 423 424 for (blk = 32; blk < PAGE_SIZE; blk <<= 1) 425 if (blk >= wantblk) return blk; 426 return blk; 427 } 428 429 static int 430 vidcaudio_trigger_output(void *addr, void *start, void *end, int blksize, 431 void (*intr)(void *), void *arg, struct audio_params *params) 432 { 433 struct vidcaudio_softc *sc = addr; 434 size_t npages, i; 435 436 DPRINTF(("vidcaudio_trigger_output %p-%p/0x%x\n", 437 start, end, blksize)); 438 439 KASSERT(blksize == vidcaudio_round_blocksize(addr, blksize)); 440 KASSERT((vaddr_t)start % blksize == 0); 441 442 sc->sc_pblksize = blksize; 443 sc->sc_pbufsize = (char *)end - (char *)start; 444 npages = sc->sc_pbufsize >> PGSHIFT; 445 if (sc->sc_ppages != NULL) 446 free(sc->sc_ppages, M_DEVBUF); 447 sc->sc_ppages = malloc(npages * sizeof(paddr_t), M_DEVBUF, M_WAITOK); 448 if (sc->sc_ppages == NULL) return ENOMEM; 449 for (i = 0; i < npages; i++) 450 if (!pmap_extract(pmap_kernel(), 451 (vaddr_t)start + i * PAGE_SIZE, &sc->sc_ppages[i])) 452 return EIO; 453 sc->sc_poffset = 0; 454 sc->sc_pintr = intr; 455 sc->sc_parg = arg; 456 457 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 458 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_ENABLE | IOMD_DMACR_QUADWORD); 459 460 /* 461 * Queue up the first two blocks, but don't tell audio code 462 * we're finished with them yet. 463 */ 464 sc->sc_pcountdown = 2; 465 466 enable_irq(sc->sc_dma_intr); 467 468 return 0; 469 } 470 471 static int 472 vidcaudio_trigger_input(void *addr, void *start, void *end, int blksize, 473 void (*intr)(void *), void *arg, struct audio_params *params) 474 { 475 476 return ENODEV; 477 } 478 479 static int 480 vidcaudio_halt_output(void *addr) 481 { 482 struct vidcaudio_softc *sc = addr; 483 484 DPRINTF(("vidcaudio_halt_output\n")); 485 disable_irq(sc->sc_dma_intr); 486 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 487 return 0; 488 } 489 490 static int 491 vidcaudio_halt_input(void *addr) 492 { 493 494 return ENODEV; 495 } 496 497 static int 498 vidcaudio_getdev(void *addr, struct audio_device *retp) 499 { 500 501 *retp = vidcaudio_device; 502 return 0; 503 } 504 505 506 static int 507 vidcaudio_set_port(void *addr, mixer_ctrl_t *cp) 508 { 509 510 return EINVAL; 511 } 512 513 static int 514 vidcaudio_get_port(void *addr, mixer_ctrl_t *cp) 515 { 516 517 return EINVAL; 518 } 519 520 static int 521 vidcaudio_query_devinfo(void *addr, mixer_devinfo_t *dip) 522 { 523 524 return ENXIO; 525 } 526 527 static int 528 vidcaudio_get_props(void *addr) 529 { 530 531 return 0; 532 } 533 534 static void 535 vidcaudio_rate(int rate) 536 { 537 538 WriteWord(vidc_base, VIDC_SFR | rate); 539 } 540 541 static void 542 vidcaudio_ctrl(int ctrl) 543 { 544 545 WriteWord(vidc_base, VIDC_SCR | ctrl); 546 } 547 548 static void 549 vidcaudio_stereo(int channel, int position) 550 { 551 552 channel = channel << 24 | VIDC_SIR0; 553 WriteWord(vidc_base, channel | position); 554 } 555 556 static int 557 vidcaudio_intr(void *arg) 558 { 559 struct vidcaudio_softc *sc = arg; 560 int status; 561 paddr_t pnext, pend; 562 563 status = IOMD_READ_BYTE(IOMD_SD0ST); 564 DPRINTF(("I[%x]", status)); 565 if ((status & IOMD_DMAST_INT) == 0) 566 return 0; 567 568 pnext = sc->sc_ppages[sc->sc_poffset >> PGSHIFT] | 569 (sc->sc_poffset & PGOFSET); 570 pend = (pnext + sc->sc_pblksize - 16) & IOMD_DMAEND_OFFSET; 571 572 switch (status & 573 (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB)) { 574 575 case (IOMD_DMAST_INT | IOMD_DMAST_BANKA): 576 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB): 577 DPRINTF(("B<0x%08lx,0x%03lx>", pnext, pend)); 578 IOMD_WRITE_WORD(IOMD_SD0CURB, pnext); 579 IOMD_WRITE_WORD(IOMD_SD0ENDB, pend); 580 break; 581 582 case (IOMD_DMAST_INT | IOMD_DMAST_BANKB): 583 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKA): 584 DPRINTF(("A<0x%08lx,0x%03lx>", pnext, pend)); 585 IOMD_WRITE_WORD(IOMD_SD0CURA, pnext); 586 IOMD_WRITE_WORD(IOMD_SD0ENDA, pend); 587 break; 588 } 589 590 sc->sc_poffset += sc->sc_pblksize; 591 if (sc->sc_poffset >= sc->sc_pbufsize) 592 sc->sc_poffset = 0; 593 594 if (sc->sc_pcountdown > 0) 595 sc->sc_pcountdown--; 596 else 597 (*sc->sc_pintr)(sc->sc_parg); 598 599 return 1; 600 } 601
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