vidcaudio.c revision 1.33
1 /* $NetBSD: vidcaudio.c,v 1.33 2004/01/10 22:33:24 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 1.33 2004/01/10 22:33:24 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 #ifndef EB7500ATX 221 case RPC600_IOMD_ID: 222 sc->sc_is16bit = (cmos_read(0xc4) >> 5) & 1; 223 sc->sc_dma_intr = IRQ_DMASCH0; 224 break; 225 #endif 226 case ARM7500_IOC_ID: 227 case ARM7500FE_IOC_ID: 228 sc->sc_is16bit = TRUE; 229 sc->sc_dma_intr = IRQ_SDMA; 230 break; 231 default: 232 aprint_error(": strange IOMD\n"); 233 return; 234 } 235 236 if (sc->sc_is16bit) 237 aprint_normal(": 16-bit external DAC\n"); 238 else 239 aprint_normal(": 8-bit internal DAC\n"); 240 241 /* Install the irq handler for the DMA interrupt */ 242 sc->sc_ih.ih_func = vidcaudio_intr; 243 sc->sc_ih.ih_arg = sc; 244 sc->sc_ih.ih_level = IPL_AUDIO; 245 sc->sc_ih.ih_name = self->dv_xname; 246 247 if (irq_claim(sc->sc_dma_intr, &sc->sc_ih) != 0) { 248 aprint_error("%s: couldn't claim IRQ %d\n", 249 self->dv_xname, sc->sc_dma_intr); 250 return; 251 } 252 253 disable_irq(sc->sc_dma_intr); 254 255 audio_attach_mi(&vidcaudio_hw_if, sc, self); 256 } 257 258 static int 259 vidcaudio_open(void *addr, int flags) 260 { 261 262 DPRINTF(("DEBUG: vidcaudio_open called\n")); 263 return 0; 264 } 265 266 static void 267 vidcaudio_close(void *addr) 268 { 269 struct vidcaudio_softc *sc = addr; 270 271 DPRINTF(("DEBUG: vidcaudio_close called\n")); 272 /* 273 * We do this here rather than in vidcaudio_halt_output() 274 * because the latter can be called from interrupt context 275 * (audio_pint()->audio_clear()->vidcaudio_halt_output()). 276 */ 277 if (sc->sc_ppages != NULL) { 278 free(sc->sc_ppages, M_DEVBUF); 279 sc->sc_ppages = NULL; 280 } 281 } 282 283 /* 284 * Interface to the generic audio driver 285 */ 286 287 static int 288 vidcaudio_query_encoding(void *addr, struct audio_encoding *fp) 289 { 290 struct vidcaudio_softc *sc = addr; 291 292 switch (fp->index) { 293 case 0: 294 strcpy(fp->name, AudioEmulaw); 295 fp->encoding = AUDIO_ENCODING_ULAW; 296 fp->precision = 8; 297 fp->flags = AUDIO_ENCODINGFLAG_EMULATED; 298 break; 299 300 case 1: 301 if (sc->sc_is16bit) { 302 strcpy(fp->name, AudioEslinear_le); 303 fp->encoding = AUDIO_ENCODING_SLINEAR_LE; 304 fp->precision = 16; 305 fp->flags = 0; 306 break; 307 } 308 /* FALLTHROUGH */ 309 default: 310 return EINVAL; 311 } 312 return 0; 313 } 314 315 #define MULAW_TO_VIDC(m) (~((m) << 1 | (m) >> 7)) 316 317 static void 318 mulaw_to_vidc(void *v, u_char *p, int cc) 319 { 320 321 while (--cc >= 0) { 322 *p = MULAW_TO_VIDC(*p); 323 ++p; 324 } 325 } 326 327 static void 328 mulaw_to_vidc_stereo(void *v, u_char *p, int cc) 329 { 330 u_char *q = p; 331 332 p += cc; 333 q += cc * 2; 334 while (--cc >= 0) { 335 q -= 2; 336 --p; 337 q[0] = q[1] = MULAW_TO_VIDC(*p); 338 } 339 } 340 341 static int 342 vidcaudio_set_params(void *addr, int setmode, int usemode, 343 struct audio_params *p, struct audio_params *r) 344 { 345 struct vidcaudio_softc *sc = addr; 346 int sample_period, ch; 347 348 if (setmode & AUMODE_PLAY) { 349 if (sc->sc_is16bit) { 350 /* ARM7500ish, 16-bit, two-channel */ 351 if (p->encoding == AUDIO_ENCODING_ULAW && 352 p->precision == 8) { 353 p->sw_code = mulaw_to_slinear16_le; 354 p->factor = 2; p->factor_denom = 1; 355 } else if (p->encoding != AUDIO_ENCODING_SLINEAR_LE || 356 p->precision != 16) 357 return EINVAL; 358 p->hw_channels = 2; 359 sample_period = 705600 / 4 / p->sample_rate; 360 if (sample_period < 3) sample_period = 3; 361 p->hw_sample_rate = 362 705600 / 4 / sample_period; 363 vidcaudio_rate(sample_period - 2); 364 vidcaudio_ctrl(SCR_SERIAL); 365 p->hw_encoding = AUDIO_ENCODING_SLINEAR_LE; 366 p->hw_precision = 16; 367 } else { 368 /* VIDC20ish, u-law, 8-channel */ 369 if (p->encoding != AUDIO_ENCODING_ULAW || 370 p->precision != 8) 371 return EINVAL; 372 /* 373 * We always use two hardware channels, 374 * because using one at 8kHz gives a nasty 375 * whining sound from the speaker. The 376 * aurateconv mechanism doesn't support ulaw, 377 * so we do the channel duplication ourselves, 378 * and don't try to do rate conversion. 379 */ 380 switch (p->channels) { 381 case 1: 382 p->sw_code = mulaw_to_vidc_stereo; 383 p->factor = 2; p->factor_denom = 1; 384 break; 385 case 2: 386 p->sw_code = mulaw_to_vidc; 387 p->factor = 1; p->factor_denom = 1; 388 break; 389 default: 390 return EINVAL; 391 } 392 p->hw_channels = p->channels; 393 sample_period = 394 1000000 / 2 / p->sample_rate; 395 if (sample_period < 3) sample_period = 3; 396 p->hw_sample_rate = p->sample_rate = 397 1000000 / 2 / sample_period; 398 p->hw_encoding = AUDIO_ENCODING_NONE; 399 p->hw_precision = 8; 400 vidcaudio_rate(sample_period - 2); 401 vidcaudio_ctrl(SCR_SDAC | SCR_CLKSEL); 402 if (p->hw_channels == 1) 403 for (ch = 0; ch < 8; ch++) 404 vidcaudio_stereo(ch, SIR_CENTRE); 405 else 406 for (ch = 0; ch < 8; ch++) 407 vidcaudio_stereo(ch, ch & 1 ? 408 SIR_LEFT_100 : SIR_RIGHT_100); 409 } 410 } 411 return 0; 412 } 413 414 static int 415 vidcaudio_round_blocksize(void *addr, int wantblk) 416 { 417 int blk; 418 419 /* 420 * Find the smallest power of two that's larger than the 421 * requested block size, but don't allow < 32 (DMA burst is 16 422 * bytes, and single bursts are tricky) or > PAGE_SIZE (DMA is 423 * confined to a page). 424 */ 425 426 for (blk = 32; blk < PAGE_SIZE; blk <<= 1) 427 if (blk >= wantblk) return blk; 428 return blk; 429 } 430 431 static int 432 vidcaudio_trigger_output(void *addr, void *start, void *end, int blksize, 433 void (*intr)(void *), void *arg, struct audio_params *params) 434 { 435 struct vidcaudio_softc *sc = addr; 436 size_t npages, i; 437 438 DPRINTF(("vidcaudio_trigger_output %p-%p/0x%x\n", 439 start, end, blksize)); 440 441 KASSERT(blksize == vidcaudio_round_blocksize(addr, blksize)); 442 KASSERT((vaddr_t)start % blksize == 0); 443 444 sc->sc_pblksize = blksize; 445 sc->sc_pbufsize = (char *)end - (char *)start; 446 npages = sc->sc_pbufsize >> PGSHIFT; 447 if (sc->sc_ppages != NULL) 448 free(sc->sc_ppages, M_DEVBUF); 449 sc->sc_ppages = malloc(npages * sizeof(paddr_t), M_DEVBUF, M_WAITOK); 450 if (sc->sc_ppages == NULL) return ENOMEM; 451 for (i = 0; i < npages; i++) 452 if (!pmap_extract(pmap_kernel(), 453 (vaddr_t)start + i * PAGE_SIZE, &sc->sc_ppages[i])) 454 return EIO; 455 sc->sc_poffset = 0; 456 sc->sc_pintr = intr; 457 sc->sc_parg = arg; 458 459 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 460 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_ENABLE | IOMD_DMACR_QUADWORD); 461 462 /* 463 * Queue up the first two blocks, but don't tell audio code 464 * we're finished with them yet. 465 */ 466 sc->sc_pcountdown = 2; 467 468 enable_irq(sc->sc_dma_intr); 469 470 return 0; 471 } 472 473 static int 474 vidcaudio_trigger_input(void *addr, void *start, void *end, int blksize, 475 void (*intr)(void *), void *arg, struct audio_params *params) 476 { 477 478 return ENODEV; 479 } 480 481 static int 482 vidcaudio_halt_output(void *addr) 483 { 484 struct vidcaudio_softc *sc = addr; 485 486 DPRINTF(("vidcaudio_halt_output\n")); 487 disable_irq(sc->sc_dma_intr); 488 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 489 return 0; 490 } 491 492 static int 493 vidcaudio_halt_input(void *addr) 494 { 495 496 return ENODEV; 497 } 498 499 static int 500 vidcaudio_getdev(void *addr, struct audio_device *retp) 501 { 502 503 *retp = vidcaudio_device; 504 return 0; 505 } 506 507 508 static int 509 vidcaudio_set_port(void *addr, mixer_ctrl_t *cp) 510 { 511 512 return EINVAL; 513 } 514 515 static int 516 vidcaudio_get_port(void *addr, mixer_ctrl_t *cp) 517 { 518 519 return EINVAL; 520 } 521 522 static int 523 vidcaudio_query_devinfo(void *addr, mixer_devinfo_t *dip) 524 { 525 526 return ENXIO; 527 } 528 529 static int 530 vidcaudio_get_props(void *addr) 531 { 532 533 return 0; 534 } 535 536 static void 537 vidcaudio_rate(int rate) 538 { 539 540 WriteWord(vidc_base, VIDC_SFR | rate); 541 } 542 543 static void 544 vidcaudio_ctrl(int ctrl) 545 { 546 547 WriteWord(vidc_base, VIDC_SCR | ctrl); 548 } 549 550 static void 551 vidcaudio_stereo(int channel, int position) 552 { 553 554 channel = channel << 24 | VIDC_SIR0; 555 WriteWord(vidc_base, channel | position); 556 } 557 558 static int 559 vidcaudio_intr(void *arg) 560 { 561 struct vidcaudio_softc *sc = arg; 562 int status; 563 paddr_t pnext, pend; 564 565 status = IOMD_READ_BYTE(IOMD_SD0ST); 566 DPRINTF(("I[%x]", status)); 567 if ((status & IOMD_DMAST_INT) == 0) 568 return 0; 569 570 pnext = sc->sc_ppages[sc->sc_poffset >> PGSHIFT] | 571 (sc->sc_poffset & PGOFSET); 572 pend = (pnext + sc->sc_pblksize - 16) & IOMD_DMAEND_OFFSET; 573 574 switch (status & 575 (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB)) { 576 577 case (IOMD_DMAST_INT | IOMD_DMAST_BANKA): 578 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB): 579 DPRINTF(("B<0x%08lx,0x%03lx>", pnext, pend)); 580 IOMD_WRITE_WORD(IOMD_SD0CURB, pnext); 581 IOMD_WRITE_WORD(IOMD_SD0ENDB, pend); 582 break; 583 584 case (IOMD_DMAST_INT | IOMD_DMAST_BANKB): 585 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKA): 586 DPRINTF(("A<0x%08lx,0x%03lx>", pnext, pend)); 587 IOMD_WRITE_WORD(IOMD_SD0CURA, pnext); 588 IOMD_WRITE_WORD(IOMD_SD0ENDA, pend); 589 break; 590 } 591 592 sc->sc_poffset += sc->sc_pblksize; 593 if (sc->sc_poffset >= sc->sc_pbufsize) 594 sc->sc_poffset = 0; 595 596 if (sc->sc_pcountdown > 0) 597 sc->sc_pcountdown--; 598 else 599 (*sc->sc_pintr)(sc->sc_parg); 600 601 return 1; 602 } 603
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