1 /* 2 * Copyright (c) 2000 David Jones <dej@ox.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/dev/sound/pci/via82c686.c,v 1.4.2.10 2003/05/11 01:45:53 orion Exp $ 27 * $DragonFly: src/sys/dev/sound/pci/via82c686.c,v 1.4 2005/05/24 20:59:04 dillon Exp $ 28 */ 29 30 #include <dev/sound/pcm/sound.h> 31 #include <dev/sound/pcm/ac97.h> 32 33 #include <bus/pci/pcireg.h> 34 #include <bus/pci/pcivar.h> 35 #include <sys/sysctl.h> 36 37 #include <dev/sound/pci/via82c686.h> 38 39 SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pci/via82c686.c,v 1.4 2005/05/24 20:59:04 dillon Exp $"); 40 41 #define VIA_PCI_ID 0x30581106 42 #define NSEGS 4 /* Number of segments in SGD table */ 43 44 #define SEGS_PER_CHAN (NSEGS/2) 45 46 #define TIMEOUT 50 47 #define VIA_DEFAULT_BUFSZ 0x1000 48 49 #undef DEB 50 #define DEB(x) 51 52 /* we rely on this struct being packed to 64 bits */ 53 struct via_dma_op { 54 u_int32_t ptr; 55 u_int32_t flags; 56 #define VIA_DMAOP_EOL 0x80000000 57 #define VIA_DMAOP_FLAG 0x40000000 58 #define VIA_DMAOP_STOP 0x20000000 59 #define VIA_DMAOP_COUNT(x) ((x)&0x00FFFFFF) 60 }; 61 62 struct via_info; 63 64 struct via_chinfo { 65 struct via_info *parent; 66 struct pcm_channel *channel; 67 struct snd_dbuf *buffer; 68 struct via_dma_op *sgd_table; 69 int dir, blksz; 70 int base, count, mode, ctrl; 71 }; 72 73 struct via_info { 74 bus_space_tag_t st; 75 bus_space_handle_t sh; 76 bus_dma_tag_t parent_dmat; 77 bus_dma_tag_t sgd_dmat; 78 bus_dmamap_t sgd_dmamap; 79 80 struct resource *reg, *irq; 81 int regid, irqid; 82 void *ih; 83 struct ac97_info *codec; 84 85 unsigned int bufsz; 86 87 struct via_chinfo pch, rch; 88 struct via_dma_op *sgd_table; 89 u_int16_t codec_caps; 90 }; 91 92 static u_int32_t via_fmt[] = { 93 AFMT_U8, 94 AFMT_STEREO | AFMT_U8, 95 AFMT_S16_LE, 96 AFMT_STEREO | AFMT_S16_LE, 97 0 98 }; 99 static struct pcmchan_caps via_vracaps = {4000, 48000, via_fmt, 0}; 100 static struct pcmchan_caps via_caps = {48000, 48000, via_fmt, 0}; 101 102 static u_int32_t 103 via_rd(struct via_info *via, int regno, int size) 104 { 105 106 switch (size) { 107 case 1: 108 return bus_space_read_1(via->st, via->sh, regno); 109 case 2: 110 return bus_space_read_2(via->st, via->sh, regno); 111 case 4: 112 return bus_space_read_4(via->st, via->sh, regno); 113 default: 114 return 0xFFFFFFFF; 115 } 116 } 117 118 119 static void 120 via_wr(struct via_info *via, int regno, u_int32_t data, int size) 121 { 122 123 switch (size) { 124 case 1: 125 bus_space_write_1(via->st, via->sh, regno, data); 126 break; 127 case 2: 128 bus_space_write_2(via->st, via->sh, regno, data); 129 break; 130 case 4: 131 bus_space_write_4(via->st, via->sh, regno, data); 132 break; 133 } 134 } 135 136 /* -------------------------------------------------------------------- */ 137 /* Codec interface */ 138 139 static int 140 via_waitready_codec(struct via_info *via) 141 { 142 int i; 143 144 /* poll until codec not busy */ 145 for (i = 0; (i < TIMEOUT) && 146 (via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_BUSY); i++) 147 DELAY(1); 148 if (i >= TIMEOUT) { 149 printf("via: codec busy\n"); 150 return 1; 151 } 152 153 return 0; 154 } 155 156 157 static int 158 via_waitvalid_codec(struct via_info *via) 159 { 160 int i; 161 162 /* poll until codec valid */ 163 for (i = 0; (i < TIMEOUT) && 164 !(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_PRIVALID); i++) 165 DELAY(1); 166 if (i >= TIMEOUT) { 167 printf("via: codec invalid\n"); 168 return 1; 169 } 170 171 return 0; 172 } 173 174 175 static int 176 via_write_codec(kobj_t obj, void *addr, int reg, u_int32_t val) 177 { 178 struct via_info *via = addr; 179 180 if (via_waitready_codec(via)) return -1; 181 182 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_INDEX(reg) | val, 4); 183 184 return 0; 185 } 186 187 188 static int 189 via_read_codec(kobj_t obj, void *addr, int reg) 190 { 191 struct via_info *via = addr; 192 193 if (via_waitready_codec(via)) 194 return -1; 195 196 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_READ | VIA_CODEC_INDEX(reg),4); 197 198 if (via_waitready_codec(via)) 199 return -1; 200 201 if (via_waitvalid_codec(via)) 202 return -1; 203 204 return via_rd(via, VIA_CODEC_CTL, 2); 205 } 206 207 static kobj_method_t via_ac97_methods[] = { 208 KOBJMETHOD(ac97_read, via_read_codec), 209 KOBJMETHOD(ac97_write, via_write_codec), 210 { 0, 0 } 211 }; 212 AC97_DECLARE(via_ac97); 213 214 /* -------------------------------------------------------------------- */ 215 216 static int 217 via_buildsgdt(struct via_chinfo *ch) 218 { 219 u_int32_t phys_addr, flag; 220 int i, segs, seg_size; 221 222 /* 223 * Build the scatter/gather DMA (SGD) table. 224 * There are four slots in the table: two for play, two for record. 225 * This creates two half-buffers, one of which is playing; the other 226 * is feeding. 227 */ 228 seg_size = ch->blksz; 229 segs = sndbuf_getsize(ch->buffer) / seg_size; 230 phys_addr = vtophys(sndbuf_getbuf(ch->buffer)); 231 232 for (i = 0; i < segs; i++) { 233 flag = (i == segs - 1)? VIA_DMAOP_EOL : VIA_DMAOP_FLAG; 234 ch->sgd_table[i].ptr = phys_addr + (i * seg_size); 235 ch->sgd_table[i].flags = flag | seg_size; 236 } 237 238 return 0; 239 } 240 241 /* channel interface */ 242 static void * 243 viachan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir) 244 { 245 struct via_info *via = devinfo; 246 struct via_chinfo *ch = (dir == PCMDIR_PLAY)? &via->pch : &via->rch; 247 248 ch->parent = via; 249 ch->channel = c; 250 ch->buffer = b; 251 ch->dir = dir; 252 ch->sgd_table = &via->sgd_table[(dir == PCMDIR_PLAY)? 0 : SEGS_PER_CHAN]; 253 if (ch->dir == PCMDIR_PLAY) { 254 ch->base = VIA_PLAY_DMAOPS_BASE; 255 ch->count = VIA_PLAY_DMAOPS_COUNT; 256 ch->ctrl = VIA_PLAY_CONTROL; 257 ch->mode = VIA_PLAY_MODE; 258 } else { 259 ch->base = VIA_RECORD_DMAOPS_BASE; 260 ch->count = VIA_RECORD_DMAOPS_COUNT; 261 ch->ctrl = VIA_RECORD_CONTROL; 262 ch->mode = VIA_RECORD_MODE; 263 } 264 265 if (sndbuf_alloc(ch->buffer, via->parent_dmat, via->bufsz) == -1) 266 return NULL; 267 return ch; 268 } 269 270 static int 271 viachan_setformat(kobj_t obj, void *data, u_int32_t format) 272 { 273 struct via_chinfo *ch = data; 274 struct via_info *via = ch->parent; 275 int mode, mode_set; 276 277 mode_set = 0; 278 if (format & AFMT_STEREO) 279 mode_set |= VIA_RPMODE_STEREO; 280 if (format & AFMT_S16_LE) 281 mode_set |= VIA_RPMODE_16BIT; 282 283 DEB(printf("set format: dir = %d, format=%x\n", ch->dir, format)); 284 mode = via_rd(via, ch->mode, 1); 285 mode &= ~(VIA_RPMODE_16BIT | VIA_RPMODE_STEREO); 286 mode |= mode_set; 287 via_wr(via, ch->mode, mode, 1); 288 289 return 0; 290 } 291 292 static int 293 viachan_setspeed(kobj_t obj, void *data, u_int32_t speed) 294 { 295 struct via_chinfo *ch = data; 296 struct via_info *via = ch->parent; 297 int reg; 298 299 /* 300 * Basic AC'97 defines a 48 kHz sample rate only. For other rates, 301 * upsampling is required. 302 * 303 * The VT82C686A does not perform upsampling, and neither do we. 304 * If the codec supports variable-rate audio (i.e. does the upsampling 305 * itself), then negotiate the rate with the codec. Otherwise, 306 * return 48 kHz cuz that's all you got. 307 */ 308 if (via->codec_caps & AC97_EXTCAP_VRA) { 309 reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE; 310 return ac97_setrate(via->codec, reg, speed); 311 } else 312 return 48000; 313 } 314 315 static int 316 viachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize) 317 { 318 struct via_chinfo *ch = data; 319 320 ch->blksz = blocksize; 321 sndbuf_resize(ch->buffer, SEGS_PER_CHAN, ch->blksz); 322 323 return ch->blksz; 324 } 325 326 static int 327 viachan_trigger(kobj_t obj, void *data, int go) 328 { 329 struct via_chinfo *ch = data; 330 struct via_info *via = ch->parent; 331 struct via_dma_op *ado; 332 333 if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD) 334 return 0; 335 336 ado = ch->sgd_table; 337 DEB(printf("ado located at va=%p pa=%x\n", ado, vtophys(ado))); 338 339 if (go == PCMTRIG_START) { 340 via_buildsgdt(ch); 341 via_wr(via, ch->base, vtophys(ado), 4); 342 via_wr(via, ch->ctrl, VIA_RPCTRL_START, 1); 343 } else 344 via_wr(via, ch->ctrl, VIA_RPCTRL_TERMINATE, 1); 345 346 DEB(printf("viachan_trigger: go=%d\n", go)); 347 return 0; 348 } 349 350 static int 351 viachan_getptr(kobj_t obj, void *data) 352 { 353 struct via_chinfo *ch = data; 354 struct via_info *via = ch->parent; 355 struct via_dma_op *ado; 356 int ptr, base, base1, len, seg; 357 358 ado = ch->sgd_table; 359 base1 = via_rd(via, ch->base, 4); 360 len = via_rd(via, ch->count, 4); 361 base = via_rd(via, ch->base, 4); 362 if (base != base1) /* Avoid race hazard */ 363 len = via_rd(via, ch->count, 4); 364 365 DEB(printf("viachan_getptr: len / base = %x / %x\n", len, base)); 366 367 /* Base points to SGD segment to do, one past current */ 368 369 /* Determine how many segments have been done */ 370 seg = (base - vtophys(ado)) / sizeof(struct via_dma_op); 371 if (seg == 0) 372 seg = SEGS_PER_CHAN; 373 374 /* Now work out offset: seg less count */ 375 ptr = (seg * sndbuf_getsize(ch->buffer) / SEGS_PER_CHAN) - len; 376 if (ch->dir == PCMDIR_REC) { 377 /* DMA appears to operate on memory 'lines' of 32 bytes */ 378 /* so don't return any part line - it isn't in RAM yet */ 379 ptr = ptr & ~0x1f; 380 } 381 382 DEB(printf("return ptr=%d\n", ptr)); 383 return ptr; 384 } 385 386 static struct pcmchan_caps * 387 viachan_getcaps(kobj_t obj, void *data) 388 { 389 struct via_chinfo *ch = data; 390 struct via_info *via = ch->parent; 391 392 return (via->codec_caps & AC97_EXTCAP_VRA)? &via_vracaps : &via_caps; 393 } 394 395 static kobj_method_t viachan_methods[] = { 396 KOBJMETHOD(channel_init, viachan_init), 397 KOBJMETHOD(channel_setformat, viachan_setformat), 398 KOBJMETHOD(channel_setspeed, viachan_setspeed), 399 KOBJMETHOD(channel_setblocksize, viachan_setblocksize), 400 KOBJMETHOD(channel_trigger, viachan_trigger), 401 KOBJMETHOD(channel_getptr, viachan_getptr), 402 KOBJMETHOD(channel_getcaps, viachan_getcaps), 403 { 0, 0 } 404 }; 405 CHANNEL_DECLARE(viachan); 406 407 /* -------------------------------------------------------------------- */ 408 409 static void 410 via_intr(void *p) 411 { 412 struct via_info *via = p; 413 int st; 414 415 /* DEB(printf("viachan_intr\n")); */ 416 /* Read channel */ 417 st = via_rd(via, VIA_PLAY_STAT, 1); 418 if (st & VIA_RPSTAT_INTR) { 419 via_wr(via, VIA_PLAY_STAT, VIA_RPSTAT_INTR, 1); 420 chn_intr(via->pch.channel); 421 } 422 423 /* Write channel */ 424 st = via_rd(via, VIA_RECORD_STAT, 1); 425 if (st & VIA_RPSTAT_INTR) { 426 via_wr(via, VIA_RECORD_STAT, VIA_RPSTAT_INTR, 1); 427 chn_intr(via->rch.channel); 428 } 429 } 430 431 /* 432 * Probe and attach the card 433 */ 434 static int 435 via_probe(device_t dev) 436 { 437 if (pci_get_devid(dev) == VIA_PCI_ID) { 438 device_set_desc(dev, "VIA VT82C686A"); 439 return 0; 440 } 441 return ENXIO; 442 } 443 444 445 static void 446 dma_cb(void *p, bus_dma_segment_t *bds, int a, int b) 447 { 448 } 449 450 451 static int 452 via_attach(device_t dev) 453 { 454 struct via_info *via = 0; 455 char status[SND_STATUSLEN]; 456 u_int32_t data, cnt; 457 458 if ((via = malloc(sizeof *via, M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) { 459 device_printf(dev, "cannot allocate softc\n"); 460 return ENXIO; 461 } 462 463 /* Get resources */ 464 data = pci_read_config(dev, PCIR_COMMAND, 2); 465 data |= (PCIM_CMD_PORTEN | PCIM_CMD_BUSMASTEREN); 466 pci_write_config(dev, PCIR_COMMAND, data, 2); 467 data = pci_read_config(dev, PCIR_COMMAND, 2); 468 469 /* Wake up and reset AC97 if necessary */ 470 data = pci_read_config(dev, VIA_AC97STATUS, 1); 471 472 if ((data & VIA_AC97STATUS_RDY) == 0) { 473 /* Cold reset per ac97r2.3 spec (page 95) */ 474 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */ 475 DELAY(100); /* Wait T_rst_low */ 476 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_NRST, 1); /* Assert high */ 477 DELAY(5); /* Wait T_rst2clk */ 478 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */ 479 } else { 480 /* Warm reset */ 481 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */ 482 DELAY(100); 483 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_SYNC, 1); /* Sync */ 484 DELAY(5); /* Wait T_sync_high */ 485 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */ 486 DELAY(5); /* Wait T_sync2clk */ 487 } 488 489 /* Power everything up */ 490 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_DESIRED, 1); 491 492 /* Wait for codec to become ready (largest reported delay here 310ms) */ 493 for (cnt = 0; cnt < 2000; cnt++) { 494 data = pci_read_config(dev, VIA_AC97STATUS, 1); 495 if (data & VIA_AC97STATUS_RDY) 496 break; 497 DELAY(5000); 498 } 499 500 via->regid = PCIR_MAPS; 501 via->reg = bus_alloc_resource(dev, SYS_RES_IOPORT, &via->regid, 0, ~0, 1, RF_ACTIVE); 502 if (!via->reg) { 503 device_printf(dev, "cannot allocate bus resource."); 504 goto bad; 505 } 506 via->st = rman_get_bustag(via->reg); 507 via->sh = rman_get_bushandle(via->reg); 508 509 via->bufsz = pcm_getbuffersize(dev, 4096, VIA_DEFAULT_BUFSZ, 65536); 510 511 via->irqid = 0; 512 via->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &via->irqid, 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 513 if (!via->irq || snd_setup_intr(dev, via->irq, 0, via_intr, via, &via->ih, NULL)) { 514 device_printf(dev, "unable to map interrupt\n"); 515 goto bad; 516 } 517 518 via_wr(via, VIA_PLAY_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1); 519 via_wr(via, VIA_RECORD_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1); 520 521 via->codec = AC97_CREATE(dev, via, via_ac97); 522 if (!via->codec) 523 goto bad; 524 525 if (mixer_init(dev, ac97_getmixerclass(), via->codec)) 526 goto bad; 527 528 via->codec_caps = ac97_getextcaps(via->codec); 529 ac97_setextmode(via->codec, 530 via->codec_caps & (AC97_EXTCAP_VRA | AC97_EXTCAP_VRM)); 531 532 /* DMA tag for buffers */ 533 if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0, 534 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 535 /*highaddr*/BUS_SPACE_MAXADDR, 536 /*filter*/NULL, /*filterarg*/NULL, 537 /*maxsize*/via->bufsz, /*nsegments*/1, /*maxsegz*/0x3ffff, 538 /*flags*/0, &via->parent_dmat) != 0) { 539 device_printf(dev, "unable to create dma tag\n"); 540 goto bad; 541 } 542 543 /* 544 * DMA tag for SGD table. The 686 uses scatter/gather DMA and 545 * requires a list in memory of work to do. We need only 16 bytes 546 * for this list, and it is wasteful to allocate 16K. 547 */ 548 if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0, 549 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 550 /*highaddr*/BUS_SPACE_MAXADDR, 551 /*filter*/NULL, /*filterarg*/NULL, 552 /*maxsize*/NSEGS * sizeof(struct via_dma_op), 553 /*nsegments*/1, /*maxsegz*/0x3ffff, 554 /*flags*/0, &via->sgd_dmat) != 0) { 555 device_printf(dev, "unable to create dma tag\n"); 556 goto bad; 557 } 558 559 if (bus_dmamem_alloc(via->sgd_dmat, (void **)&via->sgd_table, BUS_DMA_NOWAIT, &via->sgd_dmamap) == -1) 560 goto bad; 561 if (bus_dmamap_load(via->sgd_dmat, via->sgd_dmamap, via->sgd_table, NSEGS * sizeof(struct via_dma_op), dma_cb, 0, 0)) 562 goto bad; 563 564 snprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld", rman_get_start(via->reg), rman_get_start(via->irq)); 565 566 /* Register */ 567 if (pcm_register(dev, via, 1, 1)) goto bad; 568 pcm_addchan(dev, PCMDIR_PLAY, &viachan_class, via); 569 pcm_addchan(dev, PCMDIR_REC, &viachan_class, via); 570 pcm_setstatus(dev, status); 571 return 0; 572 bad: 573 if (via->codec) ac97_destroy(via->codec); 574 if (via->reg) bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg); 575 if (via->ih) bus_teardown_intr(dev, via->irq, via->ih); 576 if (via->irq) bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq); 577 if (via->parent_dmat) bus_dma_tag_destroy(via->parent_dmat); 578 if (via->sgd_dmamap) bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap); 579 if (via->sgd_dmat) bus_dma_tag_destroy(via->sgd_dmat); 580 if (via) free(via, M_DEVBUF); 581 return ENXIO; 582 } 583 584 static int 585 via_detach(device_t dev) 586 { 587 int r; 588 struct via_info *via = 0; 589 590 r = pcm_unregister(dev); 591 if (r) 592 return r; 593 594 via = pcm_getdevinfo(dev); 595 bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg); 596 bus_teardown_intr(dev, via->irq, via->ih); 597 bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq); 598 bus_dma_tag_destroy(via->parent_dmat); 599 bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap); 600 bus_dma_tag_destroy(via->sgd_dmat); 601 free(via, M_DEVBUF); 602 return 0; 603 } 604 605 606 static device_method_t via_methods[] = { 607 DEVMETHOD(device_probe, via_probe), 608 DEVMETHOD(device_attach, via_attach), 609 DEVMETHOD(device_detach, via_detach), 610 { 0, 0} 611 }; 612 613 static driver_t via_driver = { 614 "pcm", 615 via_methods, 616 PCM_SOFTC_SIZE, 617 }; 618 619 DRIVER_MODULE(snd_via82c686, pci, via_driver, pcm_devclass, 0, 0); 620 MODULE_DEPEND(snd_via82c686, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER); 621 MODULE_VERSION(snd_via82c686, 1); 622