vidcaudio.c revision 1.29
1 /* $NetBSD: vidcaudio.c,v 1.29 2004/01/01 16:42:36 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 1.29 2004/01/01 16:42:36 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 <machine/machdep.h> 84 #include <arm/arm32/katelib.h> 85 86 #include <arm/iomd/vidcaudiovar.h> 87 #include <arm/iomd/iomdreg.h> 88 #include <arm/iomd/iomdvar.h> 89 #include <arm/iomd/vidc.h> 90 #include <arm/mainbus/mainbus.h> 91 #include <arm/iomd/waveform.h> 92 #include "vidcaudio.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 void *sc_pstart; 111 void *sc_pend; 112 size_t sc_pblksize; 113 void *sc_pnext; 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 { 267 268 DPRINTF(("DEBUG: vidcaudio_close called\n")); 269 } 270 271 /* 272 * Interface to the generic audio driver 273 */ 274 275 static int 276 vidcaudio_query_encoding(void *addr, struct audio_encoding *fp) 277 { 278 struct vidcaudio_softc *sc = addr; 279 280 switch (fp->index) { 281 case 0: 282 strcpy(fp->name, AudioEmulaw); 283 fp->encoding = AUDIO_ENCODING_ULAW; 284 fp->precision = 8; 285 fp->flags = AUDIO_ENCODINGFLAG_EMULATED; 286 break; 287 288 case 1: 289 if (sc->sc_is16bit) { 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 if (sc->sc_is16bit) { 338 /* ARM7500ish, 16-bit, two-channel */ 339 if (p->encoding == AUDIO_ENCODING_ULAW && 340 p->precision == 8) { 341 p->sw_code = mulaw_to_slinear16_le; 342 p->factor = 2; p->factor_denom = 1; 343 } else if (p->encoding != AUDIO_ENCODING_SLINEAR_LE || 344 p->precision != 16) 345 return EINVAL; 346 p->hw_channels = 2; 347 sample_period = 705600 / 4 / p->sample_rate; 348 if (sample_period < 3) sample_period = 3; 349 p->hw_sample_rate = 350 705600 / 4 / sample_period; 351 vidcaudio_rate(sample_period - 2); 352 vidcaudio_ctrl(SCR_SERIAL); 353 p->hw_encoding = AUDIO_ENCODING_SLINEAR_LE; 354 p->hw_precision = 16; 355 } else { 356 /* VIDC20ish, u-law, 8-channel */ 357 if (p->encoding != AUDIO_ENCODING_ULAW || 358 p->precision != 8) 359 return EINVAL; 360 /* 361 * We always use two hardware channels, 362 * because using one at 8kHz gives a nasty 363 * whining sound from the speaker. The 364 * aurateconv mechanism doesn't support ulaw, 365 * so we do the channel duplication ourselves, 366 * and don't try to do rate conversion. 367 */ 368 switch (p->channels) { 369 case 1: 370 p->sw_code = mulaw_to_vidc_stereo; 371 p->factor = 2; p->factor_denom = 1; 372 break; 373 case 2: 374 p->sw_code = mulaw_to_vidc; 375 p->factor = 1; p->factor_denom = 1; 376 break; 377 default: 378 return EINVAL; 379 } 380 p->hw_channels = p->channels; 381 sample_period = 382 1000000 / 2 / p->sample_rate; 383 if (sample_period < 3) sample_period = 3; 384 p->hw_sample_rate = p->sample_rate = 385 1000000 / 2 / sample_period; 386 p->hw_encoding = AUDIO_ENCODING_NONE; 387 p->hw_precision = 8; 388 vidcaudio_rate(sample_period - 2); 389 vidcaudio_ctrl(SCR_SDAC | SCR_CLKSEL); 390 if (p->hw_channels == 1) 391 for (ch = 0; ch < 8; ch++) 392 vidcaudio_stereo(ch, SIR_CENTRE); 393 else 394 for (ch = 0; ch < 8; ch++) 395 vidcaudio_stereo(ch, ch & 1 ? 396 SIR_LEFT_100 : SIR_RIGHT_100); 397 } 398 } 399 return 0; 400 } 401 402 static int 403 vidcaudio_round_blocksize(void *addr, int wantblk) 404 { 405 int blk; 406 407 /* 408 * Find the smallest power of two that's larger than the 409 * requested block size, but don't allow < 32 (DMA burst is 16 410 * bytes, and single bursts are tricky) or > PAGE_SIZE (DMA is 411 * confined to a page). 412 */ 413 414 for (blk = 32; blk < PAGE_SIZE; blk <<= 1) 415 if (blk >= wantblk) return blk; 416 return blk; 417 } 418 419 static int 420 vidcaudio_trigger_output(void *addr, void *start, void *end, int blksize, 421 void (*intr)(void *), void *arg, struct audio_params *params) 422 { 423 struct vidcaudio_softc *sc = addr; 424 425 KASSERT(blksize == vidcaudio_round_blocksize(addr, blksize)); 426 427 DPRINTF(("vidcaudio_trigger_output %p-%p/0x%x\n", 428 start, end, blksize)); 429 430 sc->sc_pstart = start; 431 sc->sc_pend = end; 432 sc->sc_pblksize = blksize; 433 sc->sc_pnext = start; 434 sc->sc_pintr = intr; 435 sc->sc_parg = arg; 436 437 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 438 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_ENABLE | IOMD_DMACR_QUADWORD); 439 440 /* 441 * Queue up the first two blocks, but don't tell audio code 442 * we're finished with them yet. 443 */ 444 sc->sc_pcountdown = 2; 445 446 enable_irq(sc->sc_dma_intr); 447 448 return 0; 449 } 450 451 static int 452 vidcaudio_trigger_input(void *addr, void *start, void *end, int blksize, 453 void (*intr)(void *), void *arg, struct audio_params *params) 454 { 455 456 return ENODEV; 457 } 458 459 static int 460 vidcaudio_halt_output(void *addr) 461 { 462 struct vidcaudio_softc *sc = addr; 463 464 DPRINTF(("vidcaudio_halt_output\n")); 465 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 466 disable_irq(sc->sc_dma_intr); 467 return 0; 468 } 469 470 static int 471 vidcaudio_halt_input(void *addr) 472 { 473 474 return ENODEV; 475 } 476 477 static int 478 vidcaudio_getdev(void *addr, struct audio_device *retp) 479 { 480 481 *retp = vidcaudio_device; 482 return 0; 483 } 484 485 486 static int 487 vidcaudio_set_port(void *addr, mixer_ctrl_t *cp) 488 { 489 490 return EINVAL; 491 } 492 493 static int 494 vidcaudio_get_port(void *addr, mixer_ctrl_t *cp) 495 { 496 497 return EINVAL; 498 } 499 500 static int 501 vidcaudio_query_devinfo(void *addr, mixer_devinfo_t *dip) 502 { 503 504 return ENXIO; 505 } 506 507 static int 508 vidcaudio_get_props(void *addr) 509 { 510 511 return 0; 512 } 513 514 static void 515 vidcaudio_rate(int rate) 516 { 517 518 WriteWord(vidc_base, VIDC_SFR | rate); 519 } 520 521 static void 522 vidcaudio_ctrl(int ctrl) 523 { 524 525 WriteWord(vidc_base, VIDC_SCR | ctrl); 526 } 527 528 static void 529 vidcaudio_stereo(int channel, int position) 530 { 531 532 channel = channel << 24 | VIDC_SIR0; 533 WriteWord(vidc_base, channel | position); 534 } 535 536 static int 537 vidcaudio_intr(void *arg) 538 { 539 struct vidcaudio_softc *sc = arg; 540 int status; 541 paddr_t pnext, pend; 542 543 status = IOMD_READ_BYTE(IOMD_SD0ST); 544 DPRINTF(("I[%x]", status)); 545 if ((status & IOMD_DMAST_INT) == 0) 546 return 0; 547 548 /* FIXME: Not really allowed to use pmap here. */ 549 pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_pnext, &pnext); 550 pend = (pnext + sc->sc_pblksize - 16) & IOMD_DMAEND_OFFSET; 551 552 switch (status & 553 (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB)) { 554 555 case (IOMD_DMAST_INT | IOMD_DMAST_BANKA): 556 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB): 557 DPRINTF(("B<0x%08lx,0x%03lx>", pnext, pend)); 558 IOMD_WRITE_WORD(IOMD_SD0CURB, pnext); 559 IOMD_WRITE_WORD(IOMD_SD0ENDB, pend); 560 break; 561 562 case (IOMD_DMAST_INT | IOMD_DMAST_BANKB): 563 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKA): 564 DPRINTF(("A<0x%08lx,0x%03lx>", pnext, pend)); 565 IOMD_WRITE_WORD(IOMD_SD0CURA, pnext); 566 IOMD_WRITE_WORD(IOMD_SD0ENDA, pend); 567 break; 568 } 569 570 sc->sc_pnext = (char *)sc->sc_pnext + sc->sc_pblksize; 571 if (sc->sc_pnext >= sc->sc_pend) 572 sc->sc_pnext = sc->sc_pstart; 573 574 if (sc->sc_pcountdown > 0) 575 sc->sc_pcountdown--; 576 else 577 (*sc->sc_pintr)(sc->sc_parg); 578 579 return 1; 580 } 581
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