1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2000 David Jones <dej@ox.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifdef HAVE_KERNEL_OPTION_HEADERS 30 #include "opt_snd.h" 31 #endif 32 33 #include <dev/sound/pcm/sound.h> 34 #include <dev/sound/pcm/ac97.h> 35 36 #include <dev/pci/pcireg.h> 37 #include <dev/pci/pcivar.h> 38 #include <sys/sysctl.h> 39 40 #include <dev/sound/pci/via82c686.h> 41 42 SND_DECLARE_FILE("$FreeBSD$"); 43 44 #define VIA_PCI_ID 0x30581106 45 #define NSEGS 4 /* Number of segments in SGD table */ 46 47 #define SEGS_PER_CHAN (NSEGS/2) 48 49 #define TIMEOUT 50 50 #define VIA_DEFAULT_BUFSZ 0x1000 51 52 #undef DEB 53 #define DEB(x) 54 55 /* we rely on this struct being packed to 64 bits */ 56 struct via_dma_op { 57 u_int32_t ptr; 58 u_int32_t flags; 59 #define VIA_DMAOP_EOL 0x80000000 60 #define VIA_DMAOP_FLAG 0x40000000 61 #define VIA_DMAOP_STOP 0x20000000 62 #define VIA_DMAOP_COUNT(x) ((x)&0x00FFFFFF) 63 }; 64 65 struct via_info; 66 67 struct via_chinfo { 68 struct via_info *parent; 69 struct pcm_channel *channel; 70 struct snd_dbuf *buffer; 71 struct via_dma_op *sgd_table; 72 bus_addr_t sgd_addr; 73 int dir, blksz; 74 int base, count, mode, ctrl; 75 }; 76 77 struct via_info { 78 bus_space_tag_t st; 79 bus_space_handle_t sh; 80 bus_dma_tag_t parent_dmat; 81 bus_dma_tag_t sgd_dmat; 82 bus_dmamap_t sgd_dmamap; 83 bus_addr_t sgd_addr; 84 85 struct resource *reg, *irq; 86 int regid, irqid; 87 void *ih; 88 struct ac97_info *codec; 89 90 unsigned int bufsz; 91 92 struct via_chinfo pch, rch; 93 struct via_dma_op *sgd_table; 94 u_int16_t codec_caps; 95 struct mtx *lock; 96 }; 97 98 static u_int32_t via_fmt[] = { 99 SND_FORMAT(AFMT_U8, 1, 0), 100 SND_FORMAT(AFMT_U8, 2, 0), 101 SND_FORMAT(AFMT_S16_LE, 1, 0), 102 SND_FORMAT(AFMT_S16_LE, 2, 0), 103 0 104 }; 105 static struct pcmchan_caps via_vracaps = {4000, 48000, via_fmt, 0}; 106 static struct pcmchan_caps via_caps = {48000, 48000, via_fmt, 0}; 107 108 static __inline u_int32_t 109 via_rd(struct via_info *via, int regno, int size) 110 { 111 112 switch (size) { 113 case 1: 114 return bus_space_read_1(via->st, via->sh, regno); 115 case 2: 116 return bus_space_read_2(via->st, via->sh, regno); 117 case 4: 118 return bus_space_read_4(via->st, via->sh, regno); 119 default: 120 return 0xFFFFFFFF; 121 } 122 } 123 124 static __inline void 125 via_wr(struct via_info *via, int regno, u_int32_t data, int size) 126 { 127 128 switch (size) { 129 case 1: 130 bus_space_write_1(via->st, via->sh, regno, data); 131 break; 132 case 2: 133 bus_space_write_2(via->st, via->sh, regno, data); 134 break; 135 case 4: 136 bus_space_write_4(via->st, via->sh, regno, data); 137 break; 138 } 139 } 140 141 /* -------------------------------------------------------------------- */ 142 /* Codec interface */ 143 144 static int 145 via_waitready_codec(struct via_info *via) 146 { 147 int i; 148 149 /* poll until codec not busy */ 150 for (i = 0; (i < TIMEOUT) && 151 (via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_BUSY); i++) 152 DELAY(1); 153 if (i >= TIMEOUT) { 154 printf("via: codec busy\n"); 155 return 1; 156 } 157 158 return 0; 159 } 160 161 static int 162 via_waitvalid_codec(struct via_info *via) 163 { 164 int i; 165 166 /* poll until codec valid */ 167 for (i = 0; (i < TIMEOUT) && 168 !(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_PRIVALID); i++) 169 DELAY(1); 170 if (i >= TIMEOUT) { 171 printf("via: codec invalid\n"); 172 return 1; 173 } 174 175 return 0; 176 } 177 178 static int 179 via_write_codec(kobj_t obj, void *addr, int reg, u_int32_t val) 180 { 181 struct via_info *via = addr; 182 183 if (via_waitready_codec(via)) return -1; 184 185 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_INDEX(reg) | val, 4); 186 187 return 0; 188 } 189 190 static int 191 via_read_codec(kobj_t obj, void *addr, int reg) 192 { 193 struct via_info *via = addr; 194 195 if (via_waitready_codec(via)) 196 return -1; 197 198 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_READ | VIA_CODEC_INDEX(reg),4); 199 200 if (via_waitready_codec(via)) 201 return -1; 202 203 if (via_waitvalid_codec(via)) 204 return -1; 205 206 return via_rd(via, VIA_CODEC_CTL, 2); 207 } 208 209 static kobj_method_t via_ac97_methods[] = { 210 KOBJMETHOD(ac97_read, via_read_codec), 211 KOBJMETHOD(ac97_write, via_write_codec), 212 KOBJMETHOD_END 213 }; 214 AC97_DECLARE(via_ac97); 215 216 /* -------------------------------------------------------------------- */ 217 218 static int 219 via_buildsgdt(struct via_chinfo *ch) 220 { 221 u_int32_t phys_addr, flag; 222 int i, segs, seg_size; 223 224 /* 225 * Build the scatter/gather DMA (SGD) table. 226 * There are four slots in the table: two for play, two for record. 227 * This creates two half-buffers, one of which is playing; the other 228 * is feeding. 229 */ 230 seg_size = ch->blksz; 231 segs = sndbuf_getsize(ch->buffer) / seg_size; 232 phys_addr = sndbuf_getbufaddr(ch->buffer); 233 234 for (i = 0; i < segs; i++) { 235 flag = (i == segs - 1)? VIA_DMAOP_EOL : VIA_DMAOP_FLAG; 236 ch->sgd_table[i].ptr = phys_addr + (i * seg_size); 237 ch->sgd_table[i].flags = flag | seg_size; 238 } 239 240 return 0; 241 } 242 243 /* channel interface */ 244 static void * 245 viachan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir) 246 { 247 struct via_info *via = devinfo; 248 struct via_chinfo *ch; 249 250 snd_mtxlock(via->lock); 251 if (dir == PCMDIR_PLAY) { 252 ch = &via->pch; 253 ch->base = VIA_PLAY_DMAOPS_BASE; 254 ch->count = VIA_PLAY_DMAOPS_COUNT; 255 ch->ctrl = VIA_PLAY_CONTROL; 256 ch->mode = VIA_PLAY_MODE; 257 ch->sgd_addr = via->sgd_addr; 258 ch->sgd_table = &via->sgd_table[0]; 259 } else { 260 ch = &via->rch; 261 ch->base = VIA_RECORD_DMAOPS_BASE; 262 ch->count = VIA_RECORD_DMAOPS_COUNT; 263 ch->ctrl = VIA_RECORD_CONTROL; 264 ch->mode = VIA_RECORD_MODE; 265 ch->sgd_addr = via->sgd_addr + sizeof(struct via_dma_op) * SEGS_PER_CHAN; 266 ch->sgd_table = &via->sgd_table[SEGS_PER_CHAN]; 267 } 268 269 ch->parent = via; 270 ch->channel = c; 271 ch->buffer = b; 272 ch->dir = dir; 273 snd_mtxunlock(via->lock); 274 275 if (sndbuf_alloc(ch->buffer, via->parent_dmat, 0, via->bufsz) != 0) 276 return NULL; 277 278 return ch; 279 } 280 281 static int 282 viachan_setformat(kobj_t obj, void *data, u_int32_t format) 283 { 284 struct via_chinfo *ch = data; 285 struct via_info *via = ch->parent; 286 int mode, mode_set; 287 288 mode_set = 0; 289 if (AFMT_CHANNEL(format) > 1) 290 mode_set |= VIA_RPMODE_STEREO; 291 if (format & AFMT_S16_LE) 292 mode_set |= VIA_RPMODE_16BIT; 293 294 DEB(printf("set format: dir = %d, format=%x\n", ch->dir, format)); 295 snd_mtxlock(via->lock); 296 mode = via_rd(via, ch->mode, 1); 297 mode &= ~(VIA_RPMODE_16BIT | VIA_RPMODE_STEREO); 298 mode |= mode_set; 299 via_wr(via, ch->mode, mode, 1); 300 snd_mtxunlock(via->lock); 301 302 return 0; 303 } 304 305 static u_int32_t 306 viachan_setspeed(kobj_t obj, void *data, u_int32_t speed) 307 { 308 struct via_chinfo *ch = data; 309 struct via_info *via = ch->parent; 310 int reg; 311 312 /* 313 * Basic AC'97 defines a 48 kHz sample rate only. For other rates, 314 * upsampling is required. 315 * 316 * The VT82C686A does not perform upsampling, and neither do we. 317 * If the codec supports variable-rate audio (i.e. does the upsampling 318 * itself), then negotiate the rate with the codec. Otherwise, 319 * return 48 kHz cuz that's all you got. 320 */ 321 if (via->codec_caps & AC97_EXTCAP_VRA) { 322 reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE; 323 return ac97_setrate(via->codec, reg, speed); 324 } else 325 return 48000; 326 } 327 328 static u_int32_t 329 viachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize) 330 { 331 struct via_chinfo *ch = data; 332 333 ch->blksz = blocksize; 334 sndbuf_resize(ch->buffer, SEGS_PER_CHAN, ch->blksz); 335 336 return ch->blksz; 337 } 338 339 static int 340 viachan_trigger(kobj_t obj, void *data, int go) 341 { 342 struct via_chinfo *ch = data; 343 struct via_info *via = ch->parent; 344 bus_addr_t sgd_addr = ch->sgd_addr; 345 346 if (!PCMTRIG_COMMON(go)) 347 return 0; 348 349 DEB(printf("ado located at va=%p pa=%x\n", ch->sgd_table, sgd_addr)); 350 351 snd_mtxlock(via->lock); 352 if (go == PCMTRIG_START) { 353 via_buildsgdt(ch); 354 via_wr(via, ch->base, sgd_addr, 4); 355 via_wr(via, ch->ctrl, VIA_RPCTRL_START, 1); 356 } else 357 via_wr(via, ch->ctrl, VIA_RPCTRL_TERMINATE, 1); 358 snd_mtxunlock(via->lock); 359 360 DEB(printf("viachan_trigger: go=%d\n", go)); 361 return 0; 362 } 363 364 static u_int32_t 365 viachan_getptr(kobj_t obj, void *data) 366 { 367 struct via_chinfo *ch = data; 368 struct via_info *via = ch->parent; 369 bus_addr_t sgd_addr = ch->sgd_addr; 370 u_int32_t ptr, base, base1, len, seg; 371 372 snd_mtxlock(via->lock); 373 base1 = via_rd(via, ch->base, 4); 374 len = via_rd(via, ch->count, 4); 375 base = via_rd(via, ch->base, 4); 376 if (base != base1) /* Avoid race hazard */ 377 len = via_rd(via, ch->count, 4); 378 snd_mtxunlock(via->lock); 379 380 DEB(printf("viachan_getptr: len / base = %x / %x\n", len, base)); 381 382 /* Base points to SGD segment to do, one past current */ 383 384 /* Determine how many segments have been done */ 385 seg = (base - sgd_addr) / sizeof(struct via_dma_op); 386 if (seg == 0) 387 seg = SEGS_PER_CHAN; 388 389 /* Now work out offset: seg less count */ 390 ptr = (seg * sndbuf_getsize(ch->buffer) / SEGS_PER_CHAN) - len; 391 if (ch->dir == PCMDIR_REC) { 392 /* DMA appears to operate on memory 'lines' of 32 bytes */ 393 /* so don't return any part line - it isn't in RAM yet */ 394 ptr = ptr & ~0x1f; 395 } 396 397 DEB(printf("return ptr=%u\n", ptr)); 398 return ptr; 399 } 400 401 static struct pcmchan_caps * 402 viachan_getcaps(kobj_t obj, void *data) 403 { 404 struct via_chinfo *ch = data; 405 struct via_info *via = ch->parent; 406 407 return (via->codec_caps & AC97_EXTCAP_VRA)? &via_vracaps : &via_caps; 408 } 409 410 static kobj_method_t viachan_methods[] = { 411 KOBJMETHOD(channel_init, viachan_init), 412 KOBJMETHOD(channel_setformat, viachan_setformat), 413 KOBJMETHOD(channel_setspeed, viachan_setspeed), 414 KOBJMETHOD(channel_setblocksize, viachan_setblocksize), 415 KOBJMETHOD(channel_trigger, viachan_trigger), 416 KOBJMETHOD(channel_getptr, viachan_getptr), 417 KOBJMETHOD(channel_getcaps, viachan_getcaps), 418 KOBJMETHOD_END 419 }; 420 CHANNEL_DECLARE(viachan); 421 422 /* -------------------------------------------------------------------- */ 423 424 static void 425 via_intr(void *p) 426 { 427 struct via_info *via = p; 428 429 /* DEB(printf("viachan_intr\n")); */ 430 /* Read channel */ 431 snd_mtxlock(via->lock); 432 if (via_rd(via, VIA_PLAY_STAT, 1) & VIA_RPSTAT_INTR) { 433 via_wr(via, VIA_PLAY_STAT, VIA_RPSTAT_INTR, 1); 434 snd_mtxunlock(via->lock); 435 chn_intr(via->pch.channel); 436 snd_mtxlock(via->lock); 437 } 438 439 /* Write channel */ 440 if (via_rd(via, VIA_RECORD_STAT, 1) & VIA_RPSTAT_INTR) { 441 via_wr(via, VIA_RECORD_STAT, VIA_RPSTAT_INTR, 1); 442 snd_mtxunlock(via->lock); 443 chn_intr(via->rch.channel); 444 return; 445 } 446 snd_mtxunlock(via->lock); 447 } 448 449 /* 450 * Probe and attach the card 451 */ 452 static int 453 via_probe(device_t dev) 454 { 455 if (pci_get_devid(dev) == VIA_PCI_ID) { 456 device_set_desc(dev, "VIA VT82C686A"); 457 return BUS_PROBE_DEFAULT; 458 } 459 return ENXIO; 460 } 461 462 static void 463 dma_cb(void *p, bus_dma_segment_t *bds, int a, int b) 464 { 465 struct via_info *via = (struct via_info *)p; 466 via->sgd_addr = bds->ds_addr; 467 } 468 469 static int 470 via_attach(device_t dev) 471 { 472 struct via_info *via = NULL; 473 char status[SND_STATUSLEN]; 474 u_int32_t data, cnt; 475 476 via = malloc(sizeof(*via), M_DEVBUF, M_WAITOK | M_ZERO); 477 via->lock = snd_mtxcreate(device_get_nameunit(dev), 478 "snd_via82c686 softc"); 479 480 pci_enable_busmaster(dev); 481 482 /* Wake up and reset AC97 if necessary */ 483 data = pci_read_config(dev, VIA_AC97STATUS, 1); 484 485 if ((data & VIA_AC97STATUS_RDY) == 0) { 486 /* Cold reset per ac97r2.3 spec (page 95) */ 487 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */ 488 DELAY(100); /* Wait T_rst_low */ 489 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_NRST, 1); /* Assert high */ 490 DELAY(5); /* Wait T_rst2clk */ 491 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */ 492 } else { 493 /* Warm reset */ 494 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */ 495 DELAY(100); 496 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_SYNC, 1); /* Sync */ 497 DELAY(5); /* Wait T_sync_high */ 498 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */ 499 DELAY(5); /* Wait T_sync2clk */ 500 } 501 502 /* Power everything up */ 503 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_DESIRED, 1); 504 505 /* Wait for codec to become ready (largest reported delay here 310ms) */ 506 for (cnt = 0; cnt < 2000; cnt++) { 507 data = pci_read_config(dev, VIA_AC97STATUS, 1); 508 if (data & VIA_AC97STATUS_RDY) 509 break; 510 DELAY(5000); 511 } 512 513 via->regid = PCIR_BAR(0); 514 via->reg = bus_alloc_resource_any(dev, SYS_RES_IOPORT, 515 &via->regid, RF_ACTIVE); 516 if (!via->reg) { 517 device_printf(dev, "cannot allocate bus resource."); 518 goto bad; 519 } 520 via->st = rman_get_bustag(via->reg); 521 via->sh = rman_get_bushandle(via->reg); 522 523 via->bufsz = pcm_getbuffersize(dev, 4096, VIA_DEFAULT_BUFSZ, 65536); 524 525 via->irqid = 0; 526 via->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &via->irqid, 527 RF_ACTIVE | RF_SHAREABLE); 528 if (!via->irq || snd_setup_intr(dev, via->irq, INTR_MPSAFE, via_intr, via, &via->ih)) { 529 device_printf(dev, "unable to map interrupt\n"); 530 goto bad; 531 } 532 533 via_wr(via, VIA_PLAY_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1); 534 via_wr(via, VIA_RECORD_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1); 535 536 via->codec = AC97_CREATE(dev, via, via_ac97); 537 if (!via->codec) 538 goto bad; 539 540 if (mixer_init(dev, ac97_getmixerclass(), via->codec)) 541 goto bad; 542 543 via->codec_caps = ac97_getextcaps(via->codec); 544 ac97_setextmode(via->codec, 545 via->codec_caps & (AC97_EXTCAP_VRA | AC97_EXTCAP_VRM)); 546 547 /* DMA tag for buffers */ 548 if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2, 549 /*boundary*/0, 550 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 551 /*highaddr*/BUS_SPACE_MAXADDR, 552 /*filter*/NULL, /*filterarg*/NULL, 553 /*maxsize*/via->bufsz, /*nsegments*/1, /*maxsegz*/0x3ffff, 554 /*flags*/0, /*lockfunc*/NULL, 555 /*lockarg*/NULL, &via->parent_dmat) != 0) { 556 device_printf(dev, "unable to create dma tag\n"); 557 goto bad; 558 } 559 560 /* 561 * DMA tag for SGD table. The 686 uses scatter/gather DMA and 562 * requires a list in memory of work to do. We need only 16 bytes 563 * for this list, and it is wasteful to allocate 16K. 564 */ 565 if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2, 566 /*boundary*/0, 567 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 568 /*highaddr*/BUS_SPACE_MAXADDR, 569 /*filter*/NULL, /*filterarg*/NULL, 570 /*maxsize*/NSEGS * sizeof(struct via_dma_op), 571 /*nsegments*/1, /*maxsegz*/0x3ffff, 572 /*flags*/0, /*lockfunc*/NULL, 573 /*lockarg*/NULL, &via->sgd_dmat) != 0) { 574 device_printf(dev, "unable to create dma tag\n"); 575 goto bad; 576 } 577 578 if (bus_dmamem_alloc(via->sgd_dmat, (void **)&via->sgd_table, 579 BUS_DMA_NOWAIT, &via->sgd_dmamap) != 0) 580 goto bad; 581 if (bus_dmamap_load(via->sgd_dmat, via->sgd_dmamap, via->sgd_table, 582 NSEGS * sizeof(struct via_dma_op), dma_cb, via, 0) != 0) 583 goto bad; 584 585 snprintf(status, SND_STATUSLEN, "at io 0x%jx irq %jd %s", 586 rman_get_start(via->reg), rman_get_start(via->irq), 587 PCM_KLDSTRING(snd_via82c686)); 588 589 /* Register */ 590 if (pcm_register(dev, via, 1, 1)) goto bad; 591 pcm_addchan(dev, PCMDIR_PLAY, &viachan_class, via); 592 pcm_addchan(dev, PCMDIR_REC, &viachan_class, via); 593 pcm_setstatus(dev, status); 594 return 0; 595 bad: 596 if (via->codec) ac97_destroy(via->codec); 597 if (via->reg) bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg); 598 if (via->ih) bus_teardown_intr(dev, via->irq, via->ih); 599 if (via->irq) bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq); 600 if (via->parent_dmat) bus_dma_tag_destroy(via->parent_dmat); 601 if (via->sgd_addr) bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap); 602 if (via->sgd_table) bus_dmamem_free(via->sgd_dmat, via->sgd_table, via->sgd_dmamap); 603 if (via->sgd_dmat) bus_dma_tag_destroy(via->sgd_dmat); 604 if (via->lock) snd_mtxfree(via->lock); 605 if (via) free(via, M_DEVBUF); 606 return ENXIO; 607 } 608 609 static int 610 via_detach(device_t dev) 611 { 612 int r; 613 struct via_info *via = NULL; 614 615 r = pcm_unregister(dev); 616 if (r) 617 return r; 618 619 via = pcm_getdevinfo(dev); 620 bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg); 621 bus_teardown_intr(dev, via->irq, via->ih); 622 bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq); 623 bus_dma_tag_destroy(via->parent_dmat); 624 bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap); 625 bus_dmamem_free(via->sgd_dmat, via->sgd_table, via->sgd_dmamap); 626 bus_dma_tag_destroy(via->sgd_dmat); 627 snd_mtxfree(via->lock); 628 free(via, M_DEVBUF); 629 return 0; 630 } 631 632 static device_method_t via_methods[] = { 633 DEVMETHOD(device_probe, via_probe), 634 DEVMETHOD(device_attach, via_attach), 635 DEVMETHOD(device_detach, via_detach), 636 { 0, 0} 637 }; 638 639 static driver_t via_driver = { 640 "pcm", 641 via_methods, 642 PCM_SOFTC_SIZE, 643 }; 644 645 DRIVER_MODULE(snd_via82c686, pci, via_driver, 0, 0); 646 MODULE_DEPEND(snd_via82c686, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER); 647 MODULE_VERSION(snd_via82c686, 1); 648