1 /* $NetBSD: cs4281.c,v 1.61 2025/01/07 18:27:26 andvar Exp $ */ 2 3 /* 4 * Copyright (c) 2000 Tatoku Ogaito. All rights reserved. 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 Tatoku Ogaito 17 * for the NetBSD Project. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Cirrus Logic CS4281 driver. 35 * Data sheets can be found 36 * http://www.cirrus.com/ftp/pub/4281.pdf 37 * ftp://ftp.alsa-project.org/pub/manuals/cirrus/cs4281tm.pdf 38 * 39 * TODO: 40 * 1: midi and FM support 41 * 2: ... 42 * 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: cs4281.c,v 1.61 2025/01/07 18:27:26 andvar Exp $"); 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/fcntl.h> 52 #include <sys/device.h> 53 #include <sys/systm.h> 54 55 #include <dev/pci/pcidevs.h> 56 #include <dev/pci/pcivar.h> 57 #include <dev/pci/cs4281reg.h> 58 #include <dev/pci/cs428xreg.h> 59 60 #include <sys/audioio.h> 61 #include <dev/audio/audio_if.h> 62 #include <dev/midi_if.h> 63 64 #include <dev/ic/ac97reg.h> 65 #include <dev/ic/ac97var.h> 66 67 #include <dev/pci/cs428x.h> 68 69 #include <sys/bus.h> 70 71 #if defined(ENABLE_SECONDARY_CODEC) 72 #define MAX_CHANNELS (4) 73 #define MAX_FIFO_SIZE 32 /* 128/4channels */ 74 #else 75 #define MAX_CHANNELS (2) 76 #define MAX_FIFO_SIZE 64 /* 128/2channels */ 77 #endif 78 79 /* IF functions for audio driver */ 80 static int cs4281_match(device_t, cfdata_t, void *); 81 static void cs4281_attach(device_t, device_t, void *); 82 static int cs4281_intr(void *); 83 static int cs4281_query_format(void *, audio_format_query_t *); 84 static int cs4281_set_format(void *, int, 85 const audio_params_t *, const audio_params_t *, 86 audio_filter_reg_t *, audio_filter_reg_t *); 87 static int cs4281_halt_output(void *); 88 static int cs4281_halt_input(void *); 89 static int cs4281_getdev(void *, struct audio_device *); 90 static int cs4281_trigger_output(void *, void *, void *, int, 91 void (*)(void *), void *, 92 const audio_params_t *); 93 static int cs4281_trigger_input(void *, void *, void *, int, 94 void (*)(void *), void *, 95 const audio_params_t *); 96 97 static int cs4281_reset_codec(void *); 98 99 /* Internal functions */ 100 static uint8_t cs4281_sr2regval(int); 101 static void cs4281_set_dac_rate(struct cs428x_softc *, int); 102 static void cs4281_set_adc_rate(struct cs428x_softc *, int); 103 static int cs4281_init(struct cs428x_softc *, int); 104 105 /* Power Management */ 106 static bool cs4281_suspend(device_t, const pmf_qual_t *); 107 static bool cs4281_resume(device_t, const pmf_qual_t *); 108 109 static const struct audio_hw_if cs4281_hw_if = { 110 .query_format = cs4281_query_format, 111 .set_format = cs4281_set_format, 112 .round_blocksize = cs428x_round_blocksize, 113 .halt_output = cs4281_halt_output, 114 .halt_input = cs4281_halt_input, 115 .getdev = cs4281_getdev, 116 .set_port = cs428x_mixer_set_port, 117 .get_port = cs428x_mixer_get_port, 118 .query_devinfo = cs428x_query_devinfo, 119 .allocm = cs428x_malloc, 120 .freem = cs428x_free, 121 .round_buffersize = cs428x_round_buffersize, 122 .get_props = cs428x_get_props, 123 .trigger_output = cs4281_trigger_output, 124 .trigger_input = cs4281_trigger_input, 125 .get_locks = cs428x_get_locks, 126 }; 127 128 #if NMIDI > 0 && 0 129 /* Midi Interface */ 130 static void cs4281_midi_close(void*); 131 static void cs4281_midi_getinfo(void *, struct midi_info *); 132 static int cs4281_midi_open(void *, int, void (*)(void *, int), 133 void (*)(void *), void *); 134 static int cs4281_midi_output(void *, int); 135 136 static const struct midi_hw_if cs4281_midi_hw_if = { 137 cs4281_midi_open, 138 cs4281_midi_close, 139 cs4281_midi_output, 140 cs4281_midi_getinfo, 141 0, 142 cs428x_get_locks, 143 }; 144 #endif 145 146 CFATTACH_DECL_NEW(clct, sizeof(struct cs428x_softc), 147 cs4281_match, cs4281_attach, NULL, NULL); 148 149 static struct audio_device cs4281_device = { 150 "CS4281", 151 "", 152 "cs4281" 153 }; 154 155 static const struct audio_format cs4281_formats[] = { 156 { 157 .mode = AUMODE_PLAY | AUMODE_RECORD, 158 .encoding = AUDIO_ENCODING_SLINEAR_NE, 159 .validbits = 16, 160 .precision = 16, 161 .channels = 2, 162 .channel_mask = AUFMT_STEREO, 163 .frequency_type = 6, 164 .frequency = { 8000, 11025, 16000, 22050, 44100, 48000 }, 165 }, 166 }; 167 #define CS4281_NFORMATS __arraycount(cs4281_formats) 168 169 static int 170 cs4281_match(device_t parent, cfdata_t match, void *aux) 171 { 172 struct pci_attach_args *pa; 173 174 pa = (struct pci_attach_args *)aux; 175 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_CIRRUS) 176 return 0; 177 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CIRRUS_CS4281) 178 return 1; 179 return 0; 180 } 181 182 static void 183 cs4281_attach(device_t parent, device_t self, void *aux) 184 { 185 struct cs428x_softc *sc; 186 struct pci_attach_args *pa; 187 pci_chipset_tag_t pc; 188 char const *intrstr; 189 pcireg_t reg; 190 int error; 191 char intrbuf[PCI_INTRSTR_LEN]; 192 193 sc = device_private(self); 194 sc->sc_dev = self; 195 pa = (struct pci_attach_args *)aux; 196 pc = pa->pa_pc; 197 198 pci_aprint_devinfo(pa, "Audio controller"); 199 200 sc->sc_pc = pa->pa_pc; 201 sc->sc_pt = pa->pa_tag; 202 203 /* Map I/O register */ 204 if (pci_mapreg_map(pa, PCI_BA0, 205 PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, 206 &sc->ba0t, &sc->ba0h, NULL, NULL)) { 207 aprint_error_dev(sc->sc_dev, "can't map BA0 space\n"); 208 return; 209 } 210 if (pci_mapreg_map(pa, PCI_BA1, 211 PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, 212 &sc->ba1t, &sc->ba1h, NULL, NULL)) { 213 aprint_error_dev(sc->sc_dev, "can't map BA1 space\n"); 214 return; 215 } 216 217 sc->sc_dmatag = pa->pa_dmat; 218 219 /* power up chip */ 220 if ((error = pci_activate(pa->pa_pc, pa->pa_tag, self, 221 pci_activate_null)) && error != EOPNOTSUPP) { 222 aprint_error_dev(sc->sc_dev, "cannot activate %d\n", error); 223 return; 224 } 225 226 /* Enable the device (set bus master flag) */ 227 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 228 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, 229 reg | PCI_COMMAND_MASTER_ENABLE); 230 231 #if 0 232 /* LATENCY_TIMER setting */ 233 temp1 = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_BHLC_REG); 234 if (PCI_LATTIMER(temp1) < 32) { 235 temp1 &= 0xffff00ff; 236 temp1 |= 0x00002000; 237 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_BHLC_REG, temp1); 238 } 239 #endif 240 241 /* Map and establish the interrupt. */ 242 if (pci_intr_map(pa, &sc->intrh)) { 243 aprint_error_dev(sc->sc_dev, "couldn't map interrupt\n"); 244 return; 245 } 246 intrstr = pci_intr_string(pc, sc->intrh, intrbuf, sizeof(intrbuf)); 247 248 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 249 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_AUDIO); 250 251 sc->sc_ih = pci_intr_establish_xname(sc->sc_pc, sc->intrh, IPL_AUDIO, 252 cs4281_intr, sc, device_xname(self)); 253 if (sc->sc_ih == NULL) { 254 aprint_error_dev(sc->sc_dev, "couldn't establish interrupt"); 255 if (intrstr != NULL) 256 aprint_error(" at %s", intrstr); 257 aprint_error("\n"); 258 mutex_destroy(&sc->sc_lock); 259 mutex_destroy(&sc->sc_intr_lock); 260 return; 261 } 262 aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr); 263 264 /* 265 * Sound System start-up 266 */ 267 if (cs4281_init(sc, 1) != 0) { 268 mutex_destroy(&sc->sc_lock); 269 mutex_destroy(&sc->sc_intr_lock); 270 return; 271 } 272 273 sc->type = TYPE_CS4281; 274 275 sc->dma_size = CS4281_BUFFER_SIZE / MAX_CHANNELS; 276 sc->dma_align = 0x10; 277 sc->hw_blocksize = sc->dma_size / 2; 278 279 /* AC 97 attachment */ 280 sc->host_if.arg = sc; 281 sc->host_if.attach = cs428x_attach_codec; 282 sc->host_if.read = cs428x_read_codec; 283 sc->host_if.write = cs428x_write_codec; 284 sc->host_if.reset = cs4281_reset_codec; 285 if (ac97_attach(&sc->host_if, self, &sc->sc_lock) != 0) { 286 aprint_error_dev(sc->sc_dev, "ac97_attach failed\n"); 287 mutex_destroy(&sc->sc_lock); 288 mutex_destroy(&sc->sc_intr_lock); 289 return; 290 } 291 audio_attach_mi(&cs4281_hw_if, sc, sc->sc_dev); 292 293 #if NMIDI > 0 && 0 294 midi_attach_mi(&cs4281_midi_hw_if, sc, sc->sc_dev); 295 #endif 296 297 if (!pmf_device_register(self, cs4281_suspend, cs4281_resume)) 298 aprint_error_dev(self, "couldn't establish power handler\n"); 299 } 300 301 static int 302 cs4281_intr(void *p) 303 { 304 struct cs428x_softc *sc; 305 uint32_t intr, hdsr0, hdsr1; 306 char *empty_dma; 307 int handled; 308 309 sc = p; 310 handled = 0; 311 hdsr0 = 0; 312 hdsr1 = 0; 313 314 mutex_spin_enter(&sc->sc_intr_lock); 315 316 /* grab interrupt register */ 317 intr = BA0READ4(sc, CS4281_HISR); 318 319 DPRINTF(("cs4281_intr:")); 320 /* not for me */ 321 if ((intr & HISR_INTENA) == 0) { 322 /* clear the interrupt register */ 323 BA0WRITE4(sc, CS4281_HICR, HICR_CHGM | HICR_IEV); 324 mutex_spin_exit(&sc->sc_intr_lock); 325 return 0; 326 } 327 328 if (intr & HISR_DMA0) 329 hdsr0 = BA0READ4(sc, CS4281_HDSR0); /* clear intr condition */ 330 if (intr & HISR_DMA1) 331 hdsr1 = BA0READ4(sc, CS4281_HDSR1); /* clear intr condition */ 332 /* clear the interrupt register */ 333 BA0WRITE4(sc, CS4281_HICR, HICR_CHGM | HICR_IEV); 334 335 #ifdef CS4280_DEBUG 336 DPRINTF(("intr = 0x%08x, hdsr0 = 0x%08x hdsr1 = 0x%08x\n", 337 intr, hdsr0, hdsr1)); 338 #else 339 __USE(hdsr0); 340 __USE(hdsr1); 341 #endif 342 343 /* Playback Interrupt */ 344 if (intr & HISR_DMA0) { 345 handled = 1; 346 if (sc->sc_prun) { 347 DPRINTF((" PB DMA 0x%x(%d)", 348 (int)BA0READ4(sc, CS4281_DCA0), 349 (int)BA0READ4(sc, CS4281_DCC0))); 350 if ((sc->sc_pi%sc->sc_pcount) == 0) 351 sc->sc_pintr(sc->sc_parg); 352 /* copy buffer */ 353 ++sc->sc_pi; 354 empty_dma = sc->sc_pdma->addr; 355 if (sc->sc_pi&1) 356 empty_dma += sc->hw_blocksize; 357 memcpy(empty_dma, sc->sc_pn, sc->hw_blocksize); 358 sc->sc_pn += sc->hw_blocksize; 359 if (sc->sc_pn >= sc->sc_pe) 360 sc->sc_pn = sc->sc_ps; 361 } else { 362 aprint_error_dev(sc->sc_dev, "unexpected play intr\n"); 363 } 364 } 365 if (intr & HISR_DMA1) { 366 handled = 1; 367 if (sc->sc_rrun) { 368 /* copy from DMA */ 369 DPRINTF((" CP DMA 0x%x(%d)", (int)BA0READ4(sc, CS4281_DCA1), 370 (int)BA0READ4(sc, CS4281_DCC1))); 371 ++sc->sc_ri; 372 empty_dma = sc->sc_rdma->addr; 373 if ((sc->sc_ri & 1) == 0) 374 empty_dma += sc->hw_blocksize; 375 memcpy(sc->sc_rn, empty_dma, sc->hw_blocksize); 376 sc->sc_rn += sc->hw_blocksize; 377 if (sc->sc_rn >= sc->sc_re) 378 sc->sc_rn = sc->sc_rs; 379 if ((sc->sc_ri % sc->sc_rcount) == 0) 380 sc->sc_rintr(sc->sc_rarg); 381 } else { 382 aprint_error_dev(sc->sc_dev, 383 "unexpected record intr\n"); 384 } 385 } 386 DPRINTF(("\n")); 387 388 mutex_spin_exit(&sc->sc_intr_lock); 389 390 return handled; 391 } 392 393 static int 394 cs4281_query_format(void *addr, audio_format_query_t *afp) 395 { 396 397 return audio_query_format(cs4281_formats, CS4281_NFORMATS, afp); 398 } 399 400 static int 401 cs4281_set_format(void *addr, int setmode, 402 const audio_params_t *play, const audio_params_t *rec, 403 audio_filter_reg_t *pfil, audio_filter_reg_t *rfil) 404 { 405 struct cs428x_softc *sc; 406 407 sc = addr; 408 /* set sample rate */ 409 cs4281_set_dac_rate(sc, play->sample_rate); 410 cs4281_set_adc_rate(sc, rec->sample_rate); 411 return 0; 412 } 413 414 static int 415 cs4281_halt_output(void *addr) 416 { 417 struct cs428x_softc *sc; 418 419 sc = addr; 420 BA0WRITE4(sc, CS4281_DCR0, BA0READ4(sc, CS4281_DCR0) | DCRn_MSK); 421 sc->sc_prun = 0; 422 return 0; 423 } 424 425 static int 426 cs4281_halt_input(void *addr) 427 { 428 struct cs428x_softc *sc; 429 430 sc = addr; 431 BA0WRITE4(sc, CS4281_DCR1, BA0READ4(sc, CS4281_DCR1) | DCRn_MSK); 432 sc->sc_rrun = 0; 433 return 0; 434 } 435 436 static int 437 cs4281_getdev(void *addr, struct audio_device *retp) 438 { 439 440 *retp = cs4281_device; 441 return 0; 442 } 443 444 static int 445 cs4281_trigger_output(void *addr, void *start, void *end, int blksize, 446 void (*intr)(void *), void *arg, 447 const audio_params_t *param) 448 { 449 struct cs428x_softc *sc; 450 uint32_t fmt; 451 struct cs428x_dma *p; 452 int dma_count; 453 454 sc = addr; 455 fmt = 0; 456 #ifdef DIAGNOSTIC 457 if (sc->sc_prun) 458 printf("cs4281_trigger_output: already running\n"); 459 #endif 460 sc->sc_prun = 1; 461 462 DPRINTF(("cs4281_trigger_output: sc=%p start=%p end=%p " 463 "blksize=%d intr=%p(%p)\n", addr, start, end, blksize, intr, arg)); 464 sc->sc_pintr = intr; 465 sc->sc_parg = arg; 466 467 /* stop playback DMA */ 468 BA0WRITE4(sc, CS4281_DCR0, BA0READ4(sc, CS4281_DCR0) | DCRn_MSK); 469 470 DPRINTF(("param: precision=%d channels=%d encoding=%d\n", 471 param->precision, param->channels, param->encoding)); 472 for (p = sc->sc_dmas; p != NULL && BUFADDR(p) != start; p = p->next) 473 continue; 474 if (p == NULL) { 475 printf("cs4281_trigger_output: bad addr %p\n", start); 476 return EINVAL; 477 } 478 479 sc->sc_pcount = blksize / sc->hw_blocksize; 480 sc->sc_ps = (char *)start; 481 sc->sc_pe = (char *)end; 482 sc->sc_pdma = p; 483 sc->sc_pbuf = KERNADDR(p); 484 sc->sc_pi = 0; 485 sc->sc_pn = sc->sc_ps; 486 if (blksize >= sc->dma_size) { 487 sc->sc_pn = sc->sc_ps + sc->dma_size; 488 memcpy(sc->sc_pbuf, start, sc->dma_size); 489 ++sc->sc_pi; 490 } else { 491 sc->sc_pn = sc->sc_ps + sc->hw_blocksize; 492 memcpy(sc->sc_pbuf, start, sc->hw_blocksize); 493 } 494 495 dma_count = sc->dma_size; 496 if (param->precision != 8) 497 dma_count /= 2; /* 16 bit */ 498 if (param->channels > 1) 499 dma_count /= 2; /* Stereo */ 500 501 DPRINTF(("cs4281_trigger_output: DMAADDR(p)=0x%x count=%d\n", 502 (int)DMAADDR(p), dma_count)); 503 BA0WRITE4(sc, CS4281_DBA0, DMAADDR(p)); 504 BA0WRITE4(sc, CS4281_DBC0, dma_count-1); 505 506 /* set playback format */ 507 fmt = BA0READ4(sc, CS4281_DMR0) & ~DMRn_FMTMSK; 508 if (param->encoding == AUDIO_ENCODING_SLINEAR_BE) 509 fmt |= DMRn_BEND; 510 BA0WRITE4(sc, CS4281_DMR0, fmt); 511 512 /* set sample rate */ 513 sc->sc_prate = param->sample_rate; 514 cs4281_set_dac_rate(sc, param->sample_rate); 515 516 /* start DMA */ 517 BA0WRITE4(sc, CS4281_DCR0, BA0READ4(sc, CS4281_DCR0) & ~DCRn_MSK); 518 /* Enable interrupts */ 519 BA0WRITE4(sc, CS4281_HICR, HICR_IEV | HICR_CHGM); 520 521 DPRINTF(("HICR =0x%08x(expected 0x00000001)\n", BA0READ4(sc, CS4281_HICR))); 522 DPRINTF(("HIMR =0x%08x(expected 0x00f0fc3f)\n", BA0READ4(sc, CS4281_HIMR))); 523 DPRINTF(("DMR0 =0x%08x(expected 0x2???0018)\n", BA0READ4(sc, CS4281_DMR0))); 524 DPRINTF(("DCR0 =0x%08x(expected 0x00030000)\n", BA0READ4(sc, CS4281_DCR0))); 525 DPRINTF(("FCR0 =0x%08x(expected 0x81000f00)\n", BA0READ4(sc, CS4281_FCR0))); 526 DPRINTF(("DACSR=0x%08x(expected 1 for 44kHz 5 for 8kHz)\n", 527 BA0READ4(sc, CS4281_DACSR))); 528 DPRINTF(("SRCSA=0x%08x(expected 0x0b0a0100)\n", BA0READ4(sc, CS4281_SRCSA))); 529 DPRINTF(("SSPM&SSPM_PSRCEN =0x%08x(expected 0x00000010)\n", 530 BA0READ4(sc, CS4281_SSPM) & SSPM_PSRCEN)); 531 532 return 0; 533 } 534 535 static int 536 cs4281_trigger_input(void *addr, void *start, void *end, int blksize, 537 void (*intr)(void *), void *arg, 538 const audio_params_t *param) 539 { 540 struct cs428x_softc *sc; 541 struct cs428x_dma *p; 542 uint32_t fmt; 543 int dma_count; 544 545 sc = addr; 546 fmt = 0; 547 #ifdef DIAGNOSTIC 548 if (sc->sc_rrun) 549 printf("cs4281_trigger_input: already running\n"); 550 #endif 551 sc->sc_rrun = 1; 552 DPRINTF(("cs4281_trigger_input: sc=%p start=%p end=%p " 553 "blksize=%d intr=%p(%p)\n", addr, start, end, blksize, intr, arg)); 554 sc->sc_rintr = intr; 555 sc->sc_rarg = arg; 556 557 /* stop recording DMA */ 558 BA0WRITE4(sc, CS4281_DCR1, BA0READ4(sc, CS4281_DCR1) | DCRn_MSK); 559 560 for (p = sc->sc_dmas; p && BUFADDR(p) != start; p = p->next) 561 continue; 562 if (!p) { 563 printf("cs4281_trigger_input: bad addr %p\n", start); 564 return EINVAL; 565 } 566 567 sc->sc_rcount = blksize / sc->hw_blocksize; 568 sc->sc_rs = (char *)start; 569 sc->sc_re = (char *)end; 570 sc->sc_rdma = p; 571 sc->sc_rbuf = KERNADDR(p); 572 sc->sc_ri = 0; 573 sc->sc_rn = sc->sc_rs; 574 575 dma_count = sc->dma_size; 576 if (param->precision != 8) 577 dma_count /= 2; 578 if (param->channels > 1) 579 dma_count /= 2; 580 581 DPRINTF(("cs4281_trigger_input: DMAADDR(p)=0x%x count=%d\n", 582 (int)DMAADDR(p), dma_count)); 583 BA0WRITE4(sc, CS4281_DBA1, DMAADDR(p)); 584 BA0WRITE4(sc, CS4281_DBC1, dma_count-1); 585 586 /* set recording format */ 587 fmt = BA0READ4(sc, CS4281_DMR1) & ~DMRn_FMTMSK; 588 if (param->encoding == AUDIO_ENCODING_SLINEAR_BE) 589 fmt |= DMRn_BEND; 590 BA0WRITE4(sc, CS4281_DMR1, fmt); 591 592 /* set sample rate */ 593 sc->sc_rrate = param->sample_rate; 594 cs4281_set_adc_rate(sc, param->sample_rate); 595 596 /* Start DMA */ 597 BA0WRITE4(sc, CS4281_DCR1, BA0READ4(sc, CS4281_DCR1) & ~DCRn_MSK); 598 /* Enable interrupts */ 599 BA0WRITE4(sc, CS4281_HICR, HICR_IEV | HICR_CHGM); 600 601 DPRINTF(("HICR=0x%08x\n", BA0READ4(sc, CS4281_HICR))); 602 DPRINTF(("HIMR=0x%08x\n", BA0READ4(sc, CS4281_HIMR))); 603 DPRINTF(("DMR1=0x%08x\n", BA0READ4(sc, CS4281_DMR1))); 604 DPRINTF(("DCR1=0x%08x\n", BA0READ4(sc, CS4281_DCR1))); 605 606 return 0; 607 } 608 609 static bool 610 cs4281_suspend(device_t dv, const pmf_qual_t *qual) 611 { 612 struct cs428x_softc *sc = device_private(dv); 613 614 mutex_enter(&sc->sc_lock); 615 mutex_spin_enter(&sc->sc_intr_lock); 616 617 /* save current playback status */ 618 if (sc->sc_prun) { 619 sc->sc_suspend_state.cs4281.dcr0 = BA0READ4(sc, CS4281_DCR0); 620 sc->sc_suspend_state.cs4281.dmr0 = BA0READ4(sc, CS4281_DMR0); 621 sc->sc_suspend_state.cs4281.dbc0 = BA0READ4(sc, CS4281_DBC0); 622 sc->sc_suspend_state.cs4281.dba0 = BA0READ4(sc, CS4281_DBA0); 623 } 624 625 /* save current capture status */ 626 if (sc->sc_rrun) { 627 sc->sc_suspend_state.cs4281.dcr1 = BA0READ4(sc, CS4281_DCR1); 628 sc->sc_suspend_state.cs4281.dmr1 = BA0READ4(sc, CS4281_DMR1); 629 sc->sc_suspend_state.cs4281.dbc1 = BA0READ4(sc, CS4281_DBC1); 630 sc->sc_suspend_state.cs4281.dba1 = BA0READ4(sc, CS4281_DBA1); 631 } 632 /* Stop DMA */ 633 BA0WRITE4(sc, CS4281_DCR0, BA0READ4(sc, CS4281_DCR0) | DCRn_MSK); 634 BA0WRITE4(sc, CS4281_DCR1, BA0READ4(sc, CS4281_DCR1) | DCRn_MSK); 635 636 mutex_spin_exit(&sc->sc_intr_lock); 637 mutex_exit(&sc->sc_lock); 638 639 return true; 640 } 641 642 static bool 643 cs4281_resume(device_t dv, const pmf_qual_t *qual) 644 { 645 struct cs428x_softc *sc = device_private(dv); 646 647 mutex_enter(&sc->sc_lock); 648 mutex_spin_enter(&sc->sc_intr_lock); 649 650 cs4281_init(sc, 0); 651 cs4281_reset_codec(sc); 652 653 /* restore ac97 registers */ 654 mutex_spin_exit(&sc->sc_intr_lock); 655 (*sc->codec_if->vtbl->restore_ports)(sc->codec_if); 656 mutex_spin_enter(&sc->sc_intr_lock); 657 658 /* restore DMA related status */ 659 if (sc->sc_prun) { 660 cs4281_set_dac_rate(sc, sc->sc_prate); 661 BA0WRITE4(sc, CS4281_DBA0, sc->sc_suspend_state.cs4281.dba0); 662 BA0WRITE4(sc, CS4281_DBC0, sc->sc_suspend_state.cs4281.dbc0); 663 BA0WRITE4(sc, CS4281_DMR0, sc->sc_suspend_state.cs4281.dmr0); 664 BA0WRITE4(sc, CS4281_DCR0, sc->sc_suspend_state.cs4281.dcr0); 665 } 666 if (sc->sc_rrun) { 667 cs4281_set_adc_rate(sc, sc->sc_rrate); 668 BA0WRITE4(sc, CS4281_DBA1, sc->sc_suspend_state.cs4281.dba1); 669 BA0WRITE4(sc, CS4281_DBC1, sc->sc_suspend_state.cs4281.dbc1); 670 BA0WRITE4(sc, CS4281_DMR1, sc->sc_suspend_state.cs4281.dmr1); 671 BA0WRITE4(sc, CS4281_DCR1, sc->sc_suspend_state.cs4281.dcr1); 672 } 673 /* enable interrupts */ 674 if (sc->sc_prun || sc->sc_rrun) 675 BA0WRITE4(sc, CS4281_HICR, HICR_IEV | HICR_CHGM); 676 677 mutex_spin_exit(&sc->sc_intr_lock); 678 mutex_exit(&sc->sc_lock); 679 680 return true; 681 } 682 683 /* control AC97 codec */ 684 static int 685 cs4281_reset_codec(void *addr) 686 { 687 struct cs428x_softc *sc; 688 uint16_t data; 689 uint32_t dat32; 690 int n; 691 692 sc = addr; 693 694 DPRINTFN(3, ("cs4281_reset_codec\n")); 695 696 /* Reset codec */ 697 BA0WRITE4(sc, CS428X_ACCTL, 0); 698 delay(50); /* delay 50us */ 699 700 BA0WRITE4(sc, CS4281_SPMC, 0); 701 delay(100); /* delay 100us */ 702 BA0WRITE4(sc, CS4281_SPMC, SPMC_RSTN); 703 #if defined(ENABLE_SECONDARY_CODEC) 704 BA0WRITE4(sc, CS4281_SPMC, SPMC_RSTN | SPCM_ASDIN2E); 705 BA0WRITE4(sc, CS4281_SERMC, SERMC_TCID); 706 #endif 707 delay(50000); /* XXX: delay 50ms */ 708 709 /* Enable ASYNC generation */ 710 BA0WRITE4(sc, CS428X_ACCTL, ACCTL_ESYN); 711 712 /* Wait for codec ready. Linux driver waits 50ms here */ 713 n = 0; 714 while ((BA0READ4(sc, CS428X_ACSTS) & ACSTS_CRDY) == 0) { 715 delay(100); 716 if (++n > 1000) { 717 printf("reset_codec: AC97 codec ready timeout\n"); 718 return ETIMEDOUT; 719 } 720 } 721 #if defined(ENABLE_SECONDARY_CODEC) 722 /* secondary codec ready*/ 723 n = 0; 724 while ((BA0READ4(sc, CS4281_ACSTS2) & ACSTS2_CRDY2) == 0) { 725 delay(100); 726 if (++n > 1000) 727 return 0; 728 } 729 #endif 730 /* Set the serial timing configuration */ 731 /* XXX: undocumented but the Linux driver do this */ 732 BA0WRITE4(sc, CS4281_SERMC, SERMC_PTCAC97); 733 734 /* Wait for codec ready signal */ 735 n = 0; 736 do { 737 delay(1000); 738 if (++n > 1000) { 739 aprint_error_dev(sc->sc_dev, 740 "timeout waiting for codec ready\n"); 741 return ETIMEDOUT; 742 } 743 dat32 = BA0READ4(sc, CS428X_ACSTS) & ACSTS_CRDY; 744 } while (dat32 == 0); 745 746 /* Enable Valid Frame output on ASDOUT */ 747 BA0WRITE4(sc, CS428X_ACCTL, ACCTL_ESYN | ACCTL_VFRM); 748 749 /* Wait until codec calibration is finished. Codec register 26h */ 750 n = 0; 751 do { 752 delay(1); 753 if (++n > 1000) { 754 aprint_error_dev(sc->sc_dev, 755 "timeout waiting for codec calibration\n"); 756 return ETIMEDOUT; 757 } 758 cs428x_read_codec(sc, AC97_REG_POWER, &data); 759 } while ((data & 0x0f) != 0x0f); 760 761 /* Set the serial timing configuration again */ 762 /* XXX: undocumented but the Linux driver do this */ 763 BA0WRITE4(sc, CS4281_SERMC, SERMC_PTCAC97); 764 765 /* Wait until we've sampled input slots 3 & 4 as valid */ 766 n = 0; 767 do { 768 delay(1000); 769 if (++n > 1000) { 770 aprint_error_dev(sc->sc_dev, "timeout waiting for " 771 "sampled input slots as valid\n"); 772 return ETIMEDOUT; 773 } 774 dat32 = BA0READ4(sc, CS428X_ACISV) & (ACISV_ISV3 | ACISV_ISV4) ; 775 } while (dat32 != (ACISV_ISV3 | ACISV_ISV4)); 776 777 /* Start digital data transfer of audio data to the codec */ 778 BA0WRITE4(sc, CS428X_ACOSV, (ACOSV_SLV3 | ACOSV_SLV4)); 779 return 0; 780 } 781 782 783 /* Internal functions */ 784 785 /* convert sample rate to register value */ 786 static uint8_t 787 cs4281_sr2regval(int rate) 788 { 789 uint8_t retval; 790 791 /* We don't have to change here. but anyway ... */ 792 if (rate > 48000) 793 rate = 48000; 794 if (rate < 6023) 795 rate = 6023; 796 797 switch (rate) { 798 case 8000: 799 retval = 5; 800 break; 801 case 11025: 802 retval = 4; 803 break; 804 case 16000: 805 retval = 3; 806 break; 807 case 22050: 808 retval = 2; 809 break; 810 case 44100: 811 retval = 1; 812 break; 813 case 48000: 814 retval = 0; 815 break; 816 default: 817 retval = 1536000/rate; /* == 24576000/(rate*16) */ 818 } 819 return retval; 820 } 821 822 static void 823 cs4281_set_adc_rate(struct cs428x_softc *sc, int rate) 824 { 825 826 BA0WRITE4(sc, CS4281_ADCSR, cs4281_sr2regval(rate)); 827 } 828 829 static void 830 cs4281_set_dac_rate(struct cs428x_softc *sc, int rate) 831 { 832 833 BA0WRITE4(sc, CS4281_DACSR, cs4281_sr2regval(rate)); 834 } 835 836 static int 837 cs4281_init(struct cs428x_softc *sc, int init) 838 { 839 int n; 840 uint16_t data; 841 uint32_t dat32; 842 843 /* set "Configuration Write Protect" register to 844 * 0x4281 to allow to write */ 845 BA0WRITE4(sc, CS4281_CWPR, 0x4281); 846 847 /* 848 * Unset "Full Power-Down bit of Extended PCI Power Management 849 * Control" register to release the reset state. 850 */ 851 dat32 = BA0READ4(sc, CS4281_EPPMC); 852 if (dat32 & EPPMC_FPDN) { 853 BA0WRITE4(sc, CS4281_EPPMC, dat32 & ~EPPMC_FPDN); 854 } 855 856 /* Start PLL out in known state */ 857 BA0WRITE4(sc, CS4281_CLKCR1, 0); 858 /* Start serial ports out in known state */ 859 BA0WRITE4(sc, CS4281_SERMC, 0); 860 861 /* Reset codec */ 862 BA0WRITE4(sc, CS428X_ACCTL, 0); 863 delay(50); /* delay 50us */ 864 865 BA0WRITE4(sc, CS4281_SPMC, 0); 866 delay(100); /* delay 100us */ 867 BA0WRITE4(sc, CS4281_SPMC, SPMC_RSTN); 868 #if defined(ENABLE_SECONDARY_CODEC) 869 BA0WRITE4(sc, CS4281_SPMC, SPMC_RSTN | SPCM_ASDIN2E); 870 BA0WRITE4(sc, CS4281_SERMC, SERMC_TCID); 871 #endif 872 delay(50000); /* XXX: delay 50ms */ 873 874 /* Turn on Sound System clocks based on ABITCLK */ 875 BA0WRITE4(sc, CS4281_CLKCR1, CLKCR1_DLLP); 876 delay(50000); /* XXX: delay 50ms */ 877 BA0WRITE4(sc, CS4281_CLKCR1, CLKCR1_SWCE | CLKCR1_DLLP); 878 879 /* Set enables for sections that are needed in the SSPM registers */ 880 BA0WRITE4(sc, CS4281_SSPM, 881 SSPM_MIXEN | /* Mixer */ 882 SSPM_CSRCEN | /* Capture SRC */ 883 SSPM_PSRCEN | /* Playback SRC */ 884 SSPM_JSEN | /* Joystick */ 885 SSPM_ACLEN | /* AC LINK */ 886 SSPM_FMEN /* FM */ 887 ); 888 889 /* Wait for clock stabilization */ 890 n = 0; 891 #if 1 892 /* what document says */ 893 while ((BA0READ4(sc, CS4281_CLKCR1) & (CLKCR1_DLLRDY | CLKCR1_CLKON)) 894 != (CLKCR1_DLLRDY | CLKCR1_CLKON)) { 895 delay(100); 896 if (++n > 1000) { 897 aprint_error_dev(sc->sc_dev, 898 "timeout waiting for clock stabilization\n"); 899 return -1; 900 } 901 } 902 #else 903 /* Cirrus driver for Linux does */ 904 while (!(BA0READ4(sc, CS4281_CLKCR1) & CLKCR1_DLLRDY)) { 905 delay(1000); 906 if (++n > 1000) { 907 aprint_error_dev(sc->sc_dev, 908 "timeout waiting for clock stabilization\n"); 909 return -1; 910 } 911 } 912 #endif 913 914 /* Enable ASYNC generation */ 915 BA0WRITE4(sc, CS428X_ACCTL, ACCTL_ESYN); 916 917 /* Wait for codec ready. Linux driver waits 50ms here */ 918 n = 0; 919 while ((BA0READ4(sc, CS428X_ACSTS) & ACSTS_CRDY) == 0) { 920 delay(100); 921 if (++n > 1000) { 922 aprint_error_dev(sc->sc_dev, 923 "timeout waiting for codec ready\n"); 924 return -1; 925 } 926 } 927 928 #if defined(ENABLE_SECONDARY_CODEC) 929 /* secondary codec ready*/ 930 n = 0; 931 while ((BA0READ4(sc, CS4281_ACSTS2) & ACSTS2_CRDY2) == 0) { 932 delay(100); 933 if (++n > 1000) { 934 aprint_error_dev(sc->sc_dev, 935 "timeout waiting for secondary codec ready\n"); 936 return -1; 937 } 938 } 939 #endif 940 941 /* Set the serial timing configuration */ 942 /* XXX: undocumented but the Linux driver do this */ 943 BA0WRITE4(sc, CS4281_SERMC, SERMC_PTCAC97); 944 945 /* Wait for codec ready signal */ 946 n = 0; 947 do { 948 delay(1000); 949 if (++n > 1000) { 950 aprint_error_dev(sc->sc_dev, 951 "timeout waiting for codec ready\n"); 952 return -1; 953 } 954 dat32 = BA0READ4(sc, CS428X_ACSTS) & ACSTS_CRDY; 955 } while (dat32 == 0); 956 957 /* Enable Valid Frame output on ASDOUT */ 958 BA0WRITE4(sc, CS428X_ACCTL, ACCTL_ESYN | ACCTL_VFRM); 959 960 /* Wait until codec calibration is finished. codec register 26h */ 961 n = 0; 962 do { 963 delay(1); 964 if (++n > 1000) { 965 aprint_error_dev(sc->sc_dev, 966 "timeout waiting for codec calibration\n"); 967 return -1; 968 } 969 cs428x_read_codec(sc, AC97_REG_POWER, &data); 970 } while ((data & 0x0f) != 0x0f); 971 972 /* Set the serial timing configuration again */ 973 /* XXX: undocumented but the Linux driver do this */ 974 BA0WRITE4(sc, CS4281_SERMC, SERMC_PTCAC97); 975 976 /* Wait until we've sampled input slots 3 & 4 as valid */ 977 n = 0; 978 do { 979 delay(1000); 980 if (++n > 1000) { 981 aprint_error_dev(sc->sc_dev, "timeout waiting for " 982 "sampled input slots as valid\n"); 983 return -1; 984 } 985 dat32 = BA0READ4(sc, CS428X_ACISV) & (ACISV_ISV3 | ACISV_ISV4); 986 } while (dat32 != (ACISV_ISV3 | ACISV_ISV4)); 987 988 /* Start digital data transfer of audio data to the codec */ 989 BA0WRITE4(sc, CS428X_ACOSV, (ACOSV_SLV3 | ACOSV_SLV4)); 990 991 cs428x_write_codec(sc, AC97_REG_HEADPHONE_VOLUME, 0); 992 cs428x_write_codec(sc, AC97_REG_MASTER_VOLUME, 0); 993 994 /* Power on the DAC */ 995 cs428x_read_codec(sc, AC97_REG_POWER, &data); 996 cs428x_write_codec(sc, AC97_REG_POWER, data & 0xfdff); 997 998 /* Wait until we sample a DAC ready state. 999 * Not documented, but Linux driver does. 1000 */ 1001 for (n = 0; n < 32; ++n) { 1002 delay(1000); 1003 cs428x_read_codec(sc, AC97_REG_POWER, &data); 1004 if (data & 0x02) 1005 break; 1006 } 1007 1008 /* Power on the ADC */ 1009 cs428x_read_codec(sc, AC97_REG_POWER, &data); 1010 cs428x_write_codec(sc, AC97_REG_POWER, data & 0xfeff); 1011 1012 /* Wait until we sample ADC ready state. 1013 * Not documented, but Linux driver does. 1014 */ 1015 for (n = 0; n < 32; ++n) { 1016 delay(1000); 1017 cs428x_read_codec(sc, AC97_REG_POWER, &data); 1018 if (data & 0x01) 1019 break; 1020 } 1021 1022 #if 0 1023 /* Initialize AC-Link features */ 1024 /* variable sample-rate support */ 1025 mem = BA0READ4(sc, CS4281_SERMC); 1026 mem |= (SERMC_ODSEN1 | SERMC_ODSEN2); 1027 BA0WRITE4(sc, CS4281_SERMC, mem); 1028 /* XXX: more... */ 1029 1030 /* Initialize SSCR register features */ 1031 /* XXX: hardware volume setting */ 1032 BA0WRITE4(sc, CS4281_SSCR, ~SSCR_HVC); /* disable HW volume setting */ 1033 #endif 1034 1035 /* disable Sound Blaster Pro emulation */ 1036 /* XXX: 1037 * Cannot set since the documents does not describe which bit is 1038 * correspond to SSCR_SB. Since the reset value of SSCR is 0, 1039 * we can ignore it.*/ 1040 #if 0 1041 BA0WRITE4(sc, CS4281_SSCR, SSCR_SB); 1042 #endif 1043 1044 /* map AC97 PCM playback to DMA Channel 0 */ 1045 /* Reset FEN bit to setup first */ 1046 BA0WRITE4(sc, CS4281_FCR0, (BA0READ4(sc, CS4281_FCR0) & ~FCRn_FEN)); 1047 /* 1048 *| RS[4:0]/| | 1049 *| LS[4:0] | AC97 | Slot Function 1050 *|---------+--------+-------------------- 1051 *| 0 | 3 | Left PCM Playback 1052 *| 1 | 4 | Right PCM Playback 1053 *| 2 | 5 | Phone Line 1 DAC 1054 *| 3 | 6 | Center PCM Playback 1055 *.... 1056 * quoted from Table 29(p109) 1057 */ 1058 dat32 = 0x01 << 24 | /* RS[4:0] = 1 see above */ 1059 0x00 << 16 | /* LS[4:0] = 0 see above */ 1060 0x0f << 8 | /* SZ[6:0] = 15 size of buffer */ 1061 0x00 << 0 ; /* OF[6:0] = 0 offset */ 1062 BA0WRITE4(sc, CS4281_FCR0, dat32); 1063 BA0WRITE4(sc, CS4281_FCR0, dat32 | FCRn_FEN); 1064 1065 /* map AC97 PCM record to DMA Channel 1 */ 1066 /* Reset FEN bit to setup first */ 1067 BA0WRITE4(sc, CS4281_FCR1, (BA0READ4(sc, CS4281_FCR1) & ~FCRn_FEN)); 1068 /* 1069 *| RS[4:0]/| 1070 *| LS[4:0] | AC97 | Slot Function 1071 *|---------+------+------------------- 1072 *| 10 | 3 | Left PCM Record 1073 *| 11 | 4 | Right PCM Record 1074 *| 12 | 5 | Phone Line 1 ADC 1075 *| 13 | 6 | Mic ADC 1076 *.... 1077 * quoted from Table 30(p109) 1078 */ 1079 dat32 = 0x0b << 24 | /* RS[4:0] = 11 See above */ 1080 0x0a << 16 | /* LS[4:0] = 10 See above */ 1081 0x0f << 8 | /* SZ[6:0] = 15 Size of buffer */ 1082 0x10 << 0 ; /* OF[6:0] = 16 offset */ 1083 1084 /* XXX: I cannot understand why FCRn_PSH is needed here. */ 1085 BA0WRITE4(sc, CS4281_FCR1, dat32 | FCRn_PSH); 1086 BA0WRITE4(sc, CS4281_FCR1, dat32 | FCRn_FEN); 1087 1088 #if 0 1089 /* Disable DMA Channel 2, 3 */ 1090 BA0WRITE4(sc, CS4281_FCR2, (BA0READ4(sc, CS4281_FCR2) & ~FCRn_FEN)); 1091 BA0WRITE4(sc, CS4281_FCR3, (BA0READ4(sc, CS4281_FCR3) & ~FCRn_FEN)); 1092 #endif 1093 1094 /* Set the SRC Slot Assignment accordingly */ 1095 /*| PLSS[4:0]/ 1096 *| PRSS[4:0] | AC97 | Slot Function 1097 *|-----------+------+---------------- 1098 *| 0 | 3 | Left PCM Playback 1099 *| 1 | 4 | Right PCM Playback 1100 *| 2 | 5 | phone line 1 DAC 1101 *| 3 | 6 | Center PCM Playback 1102 *| 4 | 7 | Left Surround PCM Playback 1103 *| 5 | 8 | Right Surround PCM Playback 1104 *...... 1105 * 1106 *| CLSS[4:0]/ 1107 *| CRSS[4:0] | AC97 | Codec |Slot Function 1108 *|-----------+------+-------+----------------- 1109 *| 10 | 3 |Primary| Left PCM Record 1110 *| 11 | 4 |Primary| Right PCM Record 1111 *| 12 | 5 |Primary| Phone Line 1 ADC 1112 *| 13 | 6 |Primary| Mic ADC 1113 *|..... 1114 *| 20 | 3 | Sec. | Left PCM Record 1115 *| 21 | 4 | Sec. | Right PCM Record 1116 *| 22 | 5 | Sec. | Phone Line 1 ADC 1117 *| 23 | 6 | Sec. | Mic ADC 1118 */ 1119 dat32 = 0x0b << 24 | /* CRSS[4:0] Right PCM Record(primary) */ 1120 0x0a << 16 | /* CLSS[4:0] Left PCM Record(primary) */ 1121 0x01 << 8 | /* PRSS[4:0] Right PCM Playback */ 1122 0x00 << 0; /* PLSS[4:0] Left PCM Playback */ 1123 BA0WRITE4(sc, CS4281_SRCSA, dat32); 1124 1125 /* Set interrupt to occurred at Half and Full terminal 1126 * count interrupt enable for DMA channel 0 and 1. 1127 * To keep DMA stop, set MSK. 1128 */ 1129 dat32 = DCRn_HTCIE | DCRn_TCIE | DCRn_MSK; 1130 BA0WRITE4(sc, CS4281_DCR0, dat32); 1131 BA0WRITE4(sc, CS4281_DCR1, dat32); 1132 1133 /* Set Auto-Initialize Control enable */ 1134 BA0WRITE4(sc, CS4281_DMR0, 1135 DMRn_DMA | DMRn_AUTO | DMRn_TR_READ); 1136 BA0WRITE4(sc, CS4281_DMR1, 1137 DMRn_DMA | DMRn_AUTO | DMRn_TR_WRITE); 1138 1139 /* Clear DMA Mask in HIMR */ 1140 dat32 = ~HIMR_DMAIM & ~HIMR_D1IM & ~HIMR_D0IM; 1141 BA0WRITE4(sc, CS4281_HIMR, 1142 BA0READ4(sc, CS4281_HIMR) & dat32); 1143 1144 /* set current status */ 1145 if (init != 0) { 1146 sc->sc_prun = 0; 1147 sc->sc_rrun = 0; 1148 } 1149 1150 /* setup playback volume */ 1151 BA0WRITE4(sc, CS4281_PPRVC, 7); 1152 BA0WRITE4(sc, CS4281_PPLVC, 7); 1153 1154 return 0; 1155 } 1156