vidcaudio.c revision 1.40.2.1
1 /* $NetBSD: vidcaudio.c,v 1.40.2.1 2005/01/03 16:42:52 kent 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 1.40.2.1 2005/01/03 16:42:52 kent 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/audiobellvar.h> 82 #include <dev/auconv.h> 83 #include <dev/mulaw.h> 84 85 #include <machine/intr.h> 86 #include <machine/machdep.h> 87 #include <arm/arm32/katelib.h> 88 89 #include <arm/iomd/vidcaudiovar.h> 90 #include <arm/iomd/iomdreg.h> 91 #include <arm/iomd/iomdvar.h> 92 #include <arm/iomd/vidc.h> 93 #include <arm/mainbus/mainbus.h> 94 95 #include "pckbd.h" 96 #if NPCKBD > 0 97 #include <dev/pckbport/pckbdvar.h> 98 #endif 99 100 #include "rpckbd.h" 101 #if NRPCKBD > 0 102 #include <arm/iomd/rpckbdvar.h> 103 #endif 104 105 #include "vt.h" 106 #if NVT > 0 107 extern void vt_hookup_bell(void (*)(void *, u_int, u_int, u_int, int), void *); 108 #endif 109 110 extern int *vidc_base; 111 112 #ifdef VIDCAUDIO_DEBUG 113 #define DPRINTF(x) printf x 114 #else 115 #define DPRINTF(x) 116 #endif 117 118 struct vidcaudio_softc { 119 struct device sc_dev; 120 121 irqhandler_t sc_ih; 122 int sc_dma_intr; 123 124 int sc_is16bit; 125 126 size_t sc_pblksize; 127 vm_offset_t sc_poffset; 128 vm_offset_t sc_pbufsize; 129 paddr_t *sc_ppages; 130 void (*sc_pintr)(void *); 131 void *sc_parg; 132 int sc_pcountdown; 133 }; 134 135 static int vidcaudio_probe(struct device *, struct cfdata *, void *); 136 static void vidcaudio_attach(struct device *, struct device *, void *); 137 static int vidcaudio_open(void *, int); 138 static void vidcaudio_close(void *); 139 140 static int vidcaudio_intr(void *); 141 static void vidcaudio_rate(int); 142 static void vidcaudio_ctrl(int); 143 static void vidcaudio_stereo(int, int); 144 static stream_filter_factory_t mulaw_to_vidc; 145 static stream_filter_factory_t mulaw_to_vidc_stereo; 146 static int mulaw_to_vidc_fetch_to(stream_fetcher_t *, audio_stream_t *, int); 147 static int mulaw_to_vidc_stereo_fetch_to(stream_fetcher_t *, 148 audio_stream_t *, int); 149 150 CFATTACH_DECL(vidcaudio, sizeof(struct vidcaudio_softc), 151 vidcaudio_probe, vidcaudio_attach, NULL, NULL); 152 153 static int vidcaudio_query_encoding(void *, struct audio_encoding *); 154 static int vidcaudio_set_params(void *, int, int, audio_params_t *, 155 audio_params_t *, stream_filter_list_t *, stream_filter_list_t *); 156 static int vidcaudio_round_blocksize(void *, int); 157 static int vidcaudio_trigger_output(void *, void *, void *, int, 158 void (*)(void *), void *, const audio_params_t *); 159 static int vidcaudio_trigger_input(void *, void *, void *, int, 160 void (*)(void *), void *, const audio_params_t *); 161 static int vidcaudio_halt_output(void *); 162 static int vidcaudio_halt_input(void *); 163 static int vidcaudio_getdev(void *, struct audio_device *); 164 static int vidcaudio_set_port(void *, mixer_ctrl_t *); 165 static int vidcaudio_get_port(void *, mixer_ctrl_t *); 166 static int vidcaudio_query_devinfo(void *, mixer_devinfo_t *); 167 static int vidcaudio_get_props(void *); 168 169 static struct audio_device vidcaudio_device = { 170 "ARM VIDC", 171 "", 172 "vidcaudio" 173 }; 174 175 static const struct audio_hw_if vidcaudio_hw_if = { 176 vidcaudio_open, 177 vidcaudio_close, 178 NULL, 179 vidcaudio_query_encoding, 180 vidcaudio_set_params, 181 vidcaudio_round_blocksize, 182 NULL, 183 NULL, 184 NULL, 185 NULL, 186 NULL, 187 vidcaudio_halt_output, 188 vidcaudio_halt_input, 189 NULL, 190 vidcaudio_getdev, 191 NULL, 192 vidcaudio_set_port, 193 vidcaudio_get_port, 194 vidcaudio_query_devinfo, 195 NULL, 196 NULL, 197 NULL, 198 NULL, 199 vidcaudio_get_props, 200 vidcaudio_trigger_output, 201 vidcaudio_trigger_input, 202 NULL, 203 }; 204 205 static int 206 vidcaudio_probe(struct device *parent, struct cfdata *cf, void *aux) 207 { 208 int id; 209 210 id = IOMD_ID; 211 212 /* So far I only know about this IOMD */ 213 switch (id) { 214 case RPC600_IOMD_ID: 215 case ARM7500_IOC_ID: 216 case ARM7500FE_IOC_ID: 217 return 1; 218 default: 219 aprint_error("vidcaudio: Unknown IOMD id=%04x", id); 220 return 0; 221 } 222 } 223 224 225 static void 226 vidcaudio_attach(struct device *parent, struct device *self, void *aux) 227 { 228 struct vidcaudio_softc *sc = (void *)self; 229 struct device *beepdev; 230 231 switch (IOMD_ID) { 232 #ifndef EB7500ATX 233 case RPC600_IOMD_ID: 234 sc->sc_is16bit = (cmos_read(0xc4) >> 5) & 1; 235 sc->sc_dma_intr = IRQ_DMASCH0; 236 break; 237 #endif 238 case ARM7500_IOC_ID: 239 case ARM7500FE_IOC_ID: 240 sc->sc_is16bit = TRUE; 241 sc->sc_dma_intr = IRQ_SDMA; 242 break; 243 default: 244 aprint_error(": strange IOMD\n"); 245 return; 246 } 247 248 if (sc->sc_is16bit) 249 aprint_normal(": 16-bit external DAC\n"); 250 else 251 aprint_normal(": 8-bit internal DAC\n"); 252 253 /* Install the irq handler for the DMA interrupt */ 254 sc->sc_ih.ih_func = vidcaudio_intr; 255 sc->sc_ih.ih_arg = sc; 256 sc->sc_ih.ih_level = IPL_AUDIO; 257 sc->sc_ih.ih_name = self->dv_xname; 258 259 if (irq_claim(sc->sc_dma_intr, &sc->sc_ih) != 0) { 260 aprint_error("%s: couldn't claim IRQ %d\n", 261 self->dv_xname, sc->sc_dma_intr); 262 return; 263 } 264 265 disable_irq(sc->sc_dma_intr); 266 267 beepdev = audio_attach_mi(&vidcaudio_hw_if, sc, self); 268 #if NPCKBD > 0 269 pckbd_hookup_bell(audiobell, beepdev); 270 #endif 271 #if NRPCKBD > 0 272 rpckbd_hookup_bell(audiobell, beepdev); 273 #endif 274 #if NVT > 0 275 vt_hookup_bell(audiobell, beepdev); 276 #endif 277 } 278 279 static int 280 vidcaudio_open(void *addr, int flags) 281 { 282 283 DPRINTF(("DEBUG: vidcaudio_open called\n")); 284 return 0; 285 } 286 287 static void 288 vidcaudio_close(void *addr) 289 { 290 struct vidcaudio_softc *sc = addr; 291 292 DPRINTF(("DEBUG: vidcaudio_close called\n")); 293 /* 294 * We do this here rather than in vidcaudio_halt_output() 295 * because the latter can be called from interrupt context 296 * (audio_pint()->audio_clear()->vidcaudio_halt_output()). 297 */ 298 if (sc->sc_ppages != NULL) { 299 free(sc->sc_ppages, M_DEVBUF); 300 sc->sc_ppages = NULL; 301 } 302 } 303 304 /* 305 * Interface to the generic audio driver 306 */ 307 308 static int 309 vidcaudio_query_encoding(void *addr, struct audio_encoding *fp) 310 { 311 struct vidcaudio_softc *sc = addr; 312 313 switch (fp->index) { 314 case 0: 315 strcpy(fp->name, AudioEmulaw); 316 fp->encoding = AUDIO_ENCODING_ULAW; 317 fp->precision = 8; 318 fp->flags = AUDIO_ENCODINGFLAG_EMULATED; 319 break; 320 321 case 1: 322 if (sc->sc_is16bit) { 323 strcpy(fp->name, AudioEslinear_le); 324 fp->encoding = AUDIO_ENCODING_SLINEAR_LE; 325 fp->precision = 16; 326 fp->flags = 0; 327 break; 328 } 329 /* FALLTHROUGH */ 330 default: 331 return EINVAL; 332 } 333 return 0; 334 } 335 336 #define MULAW_TO_VIDC(m) (~((m) << 1 | (m) >> 7)) 337 338 static stream_filter_t * 339 mulaw_to_vidc(struct audio_softc *sc, const audio_params_t *from, 340 const audio_params_t *to) 341 { 342 return auconv_nocontext_filter_factory(mulaw_to_vidc_fetch_to); 343 } 344 345 static int 346 mulaw_to_vidc_fetch_to(stream_fetcher_t *self, audio_stream_t *dst, int max_used) 347 { 348 stream_filter_t *this; 349 uint8_t *d; 350 const uint8_t *s; 351 int m, err; 352 int used_dst, used_src; 353 354 this = (stream_filter_t *)self; 355 if ((err = this->prev->fetch_to(this->prev, this->src, max_used))) 356 return err; 357 m = dst->end - dst->start; 358 m = min(m, max_used); 359 d = dst->inp; 360 s = this->src->outp; 361 used_dst = audio_stream_get_used(dst); 362 used_src = audio_stream_get_used(this->src); 363 while (used_dst < m && used_src > 0) { 364 *d = MULAW_TO_VIDC(*s); 365 d = audio_stream_add_inp(dst, d, 1); 366 s = audio_stream_add_outp(this->src, s, 1); 367 used_dst++; 368 used_src--; 369 } 370 dst->inp = d; 371 this->src->outp = s; 372 return 0; 373 } 374 375 static stream_filter_t * 376 mulaw_to_vidc_stereo(struct audio_softc *sc, const audio_params_t *from, 377 const audio_params_t *to) 378 { 379 return auconv_nocontext_filter_factory(mulaw_to_vidc_stereo_fetch_to); 380 } 381 382 static int 383 mulaw_to_vidc_stereo_fetch_to(stream_fetcher_t *self, audio_stream_t *dst, 384 int max_used) 385 { 386 stream_filter_t *this; 387 uint8_t *d; 388 const uint8_t *s; 389 int m, err; 390 int used_dst, used_src; 391 392 this = (stream_filter_t *)self; 393 max_used = (max_used + 1) & ~1; 394 if ((err = this->prev->fetch_to(this->prev, this->src, max_used / 2))) 395 return err; 396 m = (dst->end - dst->start) & ~1; 397 m = min(m, max_used); 398 d = dst->inp; 399 s = this->src->outp; 400 used_dst = audio_stream_get_used(dst); 401 used_src = audio_stream_get_used(this->src); 402 while (used_dst < m && used_src > 0) { 403 d[0] = d[1] = MULAW_TO_VIDC(*s); 404 d = audio_stream_add_inp(dst, d, 2); 405 s = audio_stream_add_outp(this->src, s, 1); 406 used_dst += 2; 407 used_src--; 408 } 409 dst->inp = d; 410 this->src->outp = s; 411 return 0; 412 } 413 414 static int 415 vidcaudio_set_params(void *addr, int setmode, int usemode, 416 audio_params_t *p, audio_params_t *r, 417 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 418 { 419 audio_params_t hw; 420 struct vidcaudio_softc *sc = addr; 421 int sample_period, ch; 422 423 if ((setmode & AUMODE_PLAY) == 0) 424 return 0; 425 426 if (sc->sc_is16bit) { 427 /* ARM7500ish, 16-bit, two-channel */ 428 hw = *p; 429 if (p->encoding == AUDIO_ENCODING_ULAW && p->precision == 8) { 430 hw.encoding = AUDIO_ENCODING_SLINEAR_LE; 431 hw.precision = hw.validbits = 16; 432 pfil->append(pfil, mulaw_to_linear16, &hw); 433 } else if (p->encoding != AUDIO_ENCODING_SLINEAR_LE || 434 p->precision != 16) 435 return EINVAL; 436 sample_period = 705600 / 4 / p->sample_rate; 437 if (sample_period < 3) sample_period = 3; 438 vidcaudio_rate(sample_period - 2); 439 vidcaudio_ctrl(SCR_SERIAL); 440 hw.sample_rate = 705600 / 4 / sample_period; 441 hw.channels = 2; 442 pfil->append(pfil, aurateconv, &hw); 443 } else { 444 /* VIDC20ish, u-law, 8-channel */ 445 if (p->encoding != AUDIO_ENCODING_ULAW || p->precision != 8) 446 return EINVAL; 447 /* 448 * We always use two hardware channels, because using 449 * one at 8kHz gives a nasty whining sound from the 450 * speaker. The aurateconv mechanism doesn't support 451 * ulaw, so we do the channel duplication ourselves, 452 * and don't try to do rate conversion. 453 */ 454 sample_period = 1000000 / 2 / p->sample_rate; 455 if (sample_period < 3) sample_period = 3; 456 p->sample_rate = 1000000 / 2 / sample_period; 457 hw = *p; 458 hw.encoding = AUDIO_ENCODING_NONE; 459 hw.precision = 8; 460 vidcaudio_rate(sample_period - 2); 461 vidcaudio_ctrl(SCR_SDAC | SCR_CLKSEL); 462 if (p->channels == 1) { 463 pfil->append(pfil, mulaw_to_vidc_stereo, &hw); 464 for (ch = 0; ch < 8; ch++) 465 vidcaudio_stereo(ch, SIR_CENTRE); 466 } else { 467 pfil->append(pfil, mulaw_to_vidc, &hw); 468 for (ch = 0; ch < 8; ch += 2) 469 vidcaudio_stereo(ch, SIR_LEFT_100); 470 for (ch = 1; ch < 8; ch += 2) 471 vidcaudio_stereo(ch, SIR_RIGHT_100); 472 } 473 } 474 return 0; 475 } 476 477 static int 478 vidcaudio_round_blocksize(void *addr, int wantblk) 479 { 480 int blk; 481 482 /* 483 * Find the smallest power of two that's larger than the 484 * requested block size, but don't allow < 32 (DMA burst is 16 485 * bytes, and single bursts are tricky) or > PAGE_SIZE (DMA is 486 * confined to a page). 487 */ 488 489 for (blk = 32; blk < PAGE_SIZE; blk <<= 1) 490 if (blk >= wantblk) return blk; 491 return blk; 492 } 493 494 static int 495 vidcaudio_trigger_output(void *addr, void *start, void *end, int blksize, 496 void (*intr)(void *), void *arg, const audio_params_t *params) 497 { 498 struct vidcaudio_softc *sc = addr; 499 size_t npages, i; 500 501 DPRINTF(("vidcaudio_trigger_output %p-%p/0x%x\n", 502 start, end, blksize)); 503 504 KASSERT(blksize == vidcaudio_round_blocksize(addr, blksize)); 505 KASSERT((vaddr_t)start % blksize == 0); 506 507 sc->sc_pblksize = blksize; 508 sc->sc_pbufsize = (char *)end - (char *)start; 509 npages = sc->sc_pbufsize >> PGSHIFT; 510 if (sc->sc_ppages != NULL) 511 free(sc->sc_ppages, M_DEVBUF); 512 sc->sc_ppages = malloc(npages * sizeof(paddr_t), M_DEVBUF, M_WAITOK); 513 if (sc->sc_ppages == NULL) return ENOMEM; 514 for (i = 0; i < npages; i++) 515 if (!pmap_extract(pmap_kernel(), 516 (vaddr_t)start + i * PAGE_SIZE, &sc->sc_ppages[i])) 517 return EIO; 518 sc->sc_poffset = 0; 519 sc->sc_pintr = intr; 520 sc->sc_parg = arg; 521 522 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 523 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_ENABLE | IOMD_DMACR_QUADWORD); 524 525 /* 526 * Queue up the first two blocks, but don't tell audio code 527 * we're finished with them yet. 528 */ 529 sc->sc_pcountdown = 2; 530 531 enable_irq(sc->sc_dma_intr); 532 533 return 0; 534 } 535 536 static int 537 vidcaudio_trigger_input(void *addr, void *start, void *end, int blksize, 538 void (*intr)(void *), void *arg, const audio_params_t *params) 539 { 540 541 return ENODEV; 542 } 543 544 static int 545 vidcaudio_halt_output(void *addr) 546 { 547 struct vidcaudio_softc *sc = addr; 548 549 DPRINTF(("vidcaudio_halt_output\n")); 550 disable_irq(sc->sc_dma_intr); 551 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 552 return 0; 553 } 554 555 static int 556 vidcaudio_halt_input(void *addr) 557 { 558 559 return ENODEV; 560 } 561 562 static int 563 vidcaudio_getdev(void *addr, struct audio_device *retp) 564 { 565 566 *retp = vidcaudio_device; 567 return 0; 568 } 569 570 571 static int 572 vidcaudio_set_port(void *addr, mixer_ctrl_t *cp) 573 { 574 575 return EINVAL; 576 } 577 578 static int 579 vidcaudio_get_port(void *addr, mixer_ctrl_t *cp) 580 { 581 582 return EINVAL; 583 } 584 585 static int 586 vidcaudio_query_devinfo(void *addr, mixer_devinfo_t *dip) 587 { 588 589 return ENXIO; 590 } 591 592 static int 593 vidcaudio_get_props(void *addr) 594 { 595 596 return 0; 597 } 598 599 static void 600 vidcaudio_rate(int rate) 601 { 602 603 WriteWord(vidc_base, VIDC_SFR | rate); 604 } 605 606 static void 607 vidcaudio_ctrl(int ctrl) 608 { 609 610 WriteWord(vidc_base, VIDC_SCR | ctrl); 611 } 612 613 static void 614 vidcaudio_stereo(int channel, int position) 615 { 616 617 channel = channel << 24 | VIDC_SIR0; 618 WriteWord(vidc_base, channel | position); 619 } 620 621 static int 622 vidcaudio_intr(void *arg) 623 { 624 struct vidcaudio_softc *sc = arg; 625 int status; 626 paddr_t pnext, pend; 627 628 status = IOMD_READ_BYTE(IOMD_SD0ST); 629 DPRINTF(("I[%x]", status)); 630 if ((status & IOMD_DMAST_INT) == 0) 631 return 0; 632 633 pnext = sc->sc_ppages[sc->sc_poffset >> PGSHIFT] | 634 (sc->sc_poffset & PGOFSET); 635 pend = (pnext + sc->sc_pblksize - 16) & IOMD_DMAEND_OFFSET; 636 637 switch (status & 638 (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB)) { 639 640 case (IOMD_DMAST_INT | IOMD_DMAST_BANKA): 641 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB): 642 DPRINTF(("B<0x%08lx,0x%03lx>", pnext, pend)); 643 IOMD_WRITE_WORD(IOMD_SD0CURB, pnext); 644 IOMD_WRITE_WORD(IOMD_SD0ENDB, pend); 645 break; 646 647 case (IOMD_DMAST_INT | IOMD_DMAST_BANKB): 648 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKA): 649 DPRINTF(("A<0x%08lx,0x%03lx>", pnext, pend)); 650 IOMD_WRITE_WORD(IOMD_SD0CURA, pnext); 651 IOMD_WRITE_WORD(IOMD_SD0ENDA, pend); 652 break; 653 } 654 655 sc->sc_poffset += sc->sc_pblksize; 656 if (sc->sc_poffset >= sc->sc_pbufsize) 657 sc->sc_poffset = 0; 658 659 if (sc->sc_pcountdown > 0) 660 sc->sc_pcountdown--; 661 else 662 (*sc->sc_pintr)(sc->sc_parg); 663 664 return 1; 665 } 666
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