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 27 #ifdef HAVE_KERNEL_OPTION_HEADERS 28 #include "opt_snd.h" 29 #endif 30 31 #include <dev/sound/pcm/sound.h> 32 #include <dev/sound/pcm/ac97.h> 33 34 #include <bus/pci/pcireg.h> 35 #include <bus/pci/pcivar.h> 36 #include <sys/sysctl.h> 37 38 #include <dev/sound/pci/via82c686.h> 39 40 SND_DECLARE_FILE("$FreeBSD: head/sys/dev/sound/pci/via82c686.c 267581 2014-06-17 16:07:57Z jhb $"); 41 42 #define VIA_PCI_ID 0x30581106 43 #define NSEGS 4 /* Number of segments in SGD table */ 44 45 #define SEGS_PER_CHAN (NSEGS/2) 46 47 #define TIMEOUT 50 48 #define VIA_DEFAULT_BUFSZ 0x1000 49 50 #undef DEB 51 #define DEB(x) 52 53 /* we rely on this struct being packed to 64 bits */ 54 struct via_dma_op { 55 u_int32_t ptr; 56 u_int32_t flags; 57 #define VIA_DMAOP_EOL 0x80000000 58 #define VIA_DMAOP_FLAG 0x40000000 59 #define VIA_DMAOP_STOP 0x20000000 60 #define VIA_DMAOP_COUNT(x) ((x)&0x00FFFFFF) 61 }; 62 63 struct via_info; 64 65 struct via_chinfo { 66 struct via_info *parent; 67 struct pcm_channel *channel; 68 struct snd_dbuf *buffer; 69 struct via_dma_op *sgd_table; 70 bus_addr_t sgd_addr; 71 int dir, blksz; 72 int base, count, mode, ctrl; 73 }; 74 75 struct via_info { 76 bus_space_tag_t st; 77 bus_space_handle_t sh; 78 bus_dma_tag_t parent_dmat; 79 bus_dma_tag_t sgd_dmat; 80 bus_dmamap_t sgd_dmamap; 81 bus_addr_t sgd_addr; 82 83 struct resource *reg, *irq; 84 int regid, irqid; 85 void *ih; 86 struct ac97_info *codec; 87 88 unsigned int bufsz; 89 90 struct via_chinfo pch, rch; 91 struct via_dma_op *sgd_table; 92 u_int16_t codec_caps; 93 struct lock *lock; 94 }; 95 96 static u_int32_t via_fmt[] = { 97 SND_FORMAT(AFMT_U8, 1, 0), 98 SND_FORMAT(AFMT_U8, 2, 0), 99 SND_FORMAT(AFMT_S16_LE, 1, 0), 100 SND_FORMAT(AFMT_S16_LE, 2, 0), 101 0 102 }; 103 static struct pcmchan_caps via_vracaps = {4000, 48000, via_fmt, 0}; 104 static struct pcmchan_caps via_caps = {48000, 48000, via_fmt, 0}; 105 106 static __inline u_int32_t 107 via_rd(struct via_info *via, int regno, int size) 108 { 109 110 switch (size) { 111 case 1: 112 return bus_space_read_1(via->st, via->sh, regno); 113 case 2: 114 return bus_space_read_2(via->st, via->sh, regno); 115 case 4: 116 return bus_space_read_4(via->st, via->sh, regno); 117 default: 118 return 0xFFFFFFFF; 119 } 120 } 121 122 123 static __inline void 124 via_wr(struct via_info *via, int regno, u_int32_t data, int size) 125 { 126 127 switch (size) { 128 case 1: 129 bus_space_write_1(via->st, via->sh, regno, data); 130 break; 131 case 2: 132 bus_space_write_2(via->st, via->sh, regno, data); 133 break; 134 case 4: 135 bus_space_write_4(via->st, via->sh, regno, data); 136 break; 137 } 138 } 139 140 /* -------------------------------------------------------------------- */ 141 /* Codec interface */ 142 143 static int 144 via_waitready_codec(struct via_info *via) 145 { 146 int i; 147 148 /* poll until codec not busy */ 149 for (i = 0; (i < TIMEOUT) && 150 (via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_BUSY); i++) 151 DELAY(1); 152 if (i >= TIMEOUT) { 153 kprintf("via: codec busy\n"); 154 return 1; 155 } 156 157 return 0; 158 } 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 kprintf("via: codec invalid\n"); 172 return 1; 173 } 174 175 return 0; 176 } 177 178 179 static int 180 via_write_codec(kobj_t obj, void *addr, int reg, u_int32_t val) 181 { 182 struct via_info *via = addr; 183 184 if (via_waitready_codec(via)) return -1; 185 186 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_INDEX(reg) | val, 4); 187 188 return 0; 189 } 190 191 192 static int 193 via_read_codec(kobj_t obj, void *addr, int reg) 194 { 195 struct via_info *via = addr; 196 197 if (via_waitready_codec(via)) 198 return -1; 199 200 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_READ | VIA_CODEC_INDEX(reg),4); 201 202 if (via_waitready_codec(via)) 203 return -1; 204 205 if (via_waitvalid_codec(via)) 206 return -1; 207 208 return via_rd(via, VIA_CODEC_CTL, 2); 209 } 210 211 static kobj_method_t via_ac97_methods[] = { 212 KOBJMETHOD(ac97_read, via_read_codec), 213 KOBJMETHOD(ac97_write, via_write_codec), 214 KOBJMETHOD_END 215 }; 216 AC97_DECLARE(via_ac97); 217 218 /* -------------------------------------------------------------------- */ 219 220 static int 221 via_buildsgdt(struct via_chinfo *ch) 222 { 223 u_int32_t phys_addr, flag; 224 int i, segs, seg_size; 225 226 /* 227 * Build the scatter/gather DMA (SGD) table. 228 * There are four slots in the table: two for play, two for record. 229 * This creates two half-buffers, one of which is playing; the other 230 * is feeding. 231 */ 232 seg_size = ch->blksz; 233 segs = sndbuf_getsize(ch->buffer) / seg_size; 234 phys_addr = sndbuf_getbufaddr(ch->buffer); 235 236 for (i = 0; i < segs; i++) { 237 flag = (i == segs - 1)? VIA_DMAOP_EOL : VIA_DMAOP_FLAG; 238 ch->sgd_table[i].ptr = phys_addr + (i * seg_size); 239 ch->sgd_table[i].flags = flag | seg_size; 240 } 241 242 return 0; 243 } 244 245 /* channel interface */ 246 static void * 247 viachan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir) 248 { 249 struct via_info *via = devinfo; 250 struct via_chinfo *ch; 251 252 snd_mtxlock(via->lock); 253 if (dir == PCMDIR_PLAY) { 254 ch = &via->pch; 255 ch->base = VIA_PLAY_DMAOPS_BASE; 256 ch->count = VIA_PLAY_DMAOPS_COUNT; 257 ch->ctrl = VIA_PLAY_CONTROL; 258 ch->mode = VIA_PLAY_MODE; 259 ch->sgd_addr = via->sgd_addr; 260 ch->sgd_table = &via->sgd_table[0]; 261 } else { 262 ch = &via->rch; 263 ch->base = VIA_RECORD_DMAOPS_BASE; 264 ch->count = VIA_RECORD_DMAOPS_COUNT; 265 ch->ctrl = VIA_RECORD_CONTROL; 266 ch->mode = VIA_RECORD_MODE; 267 ch->sgd_addr = via->sgd_addr + sizeof(struct via_dma_op) * SEGS_PER_CHAN; 268 ch->sgd_table = &via->sgd_table[SEGS_PER_CHAN]; 269 } 270 271 ch->parent = via; 272 ch->channel = c; 273 ch->buffer = b; 274 ch->dir = dir; 275 snd_mtxunlock(via->lock); 276 277 if (sndbuf_alloc(ch->buffer, via->parent_dmat, 0, via->bufsz) != 0) 278 return NULL; 279 280 return ch; 281 } 282 283 static int 284 viachan_setformat(kobj_t obj, void *data, u_int32_t format) 285 { 286 struct via_chinfo *ch = data; 287 struct via_info *via = ch->parent; 288 int mode, mode_set; 289 290 mode_set = 0; 291 if (AFMT_CHANNEL(format) > 1) 292 mode_set |= VIA_RPMODE_STEREO; 293 if (format & AFMT_S16_LE) 294 mode_set |= VIA_RPMODE_16BIT; 295 296 DEB(printf("set format: dir = %d, format=%x\n", ch->dir, format)); 297 snd_mtxlock(via->lock); 298 mode = via_rd(via, ch->mode, 1); 299 mode &= ~(VIA_RPMODE_16BIT | VIA_RPMODE_STEREO); 300 mode |= mode_set; 301 via_wr(via, ch->mode, mode, 1); 302 snd_mtxunlock(via->lock); 303 304 return 0; 305 } 306 307 static u_int32_t 308 viachan_setspeed(kobj_t obj, void *data, u_int32_t speed) 309 { 310 struct via_chinfo *ch = data; 311 struct via_info *via = ch->parent; 312 int reg; 313 314 /* 315 * Basic AC'97 defines a 48 kHz sample rate only. For other rates, 316 * upsampling is required. 317 * 318 * The VT82C686A does not perform upsampling, and neither do we. 319 * If the codec supports variable-rate audio (i.e. does the upsampling 320 * itself), then negotiate the rate with the codec. Otherwise, 321 * return 48 kHz cuz that's all you got. 322 */ 323 if (via->codec_caps & AC97_EXTCAP_VRA) { 324 reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE; 325 return ac97_setrate(via->codec, reg, speed); 326 } else 327 return 48000; 328 } 329 330 static u_int32_t 331 viachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize) 332 { 333 struct via_chinfo *ch = data; 334 335 ch->blksz = blocksize; 336 sndbuf_resize(ch->buffer, SEGS_PER_CHAN, ch->blksz); 337 338 return ch->blksz; 339 } 340 341 static int 342 viachan_trigger(kobj_t obj, void *data, int go) 343 { 344 struct via_chinfo *ch = data; 345 struct via_info *via = ch->parent; 346 struct via_dma_op *ado; 347 bus_addr_t sgd_addr = ch->sgd_addr; 348 349 if (!PCMTRIG_COMMON(go)) 350 return 0; 351 352 ado = ch->sgd_table; 353 DEB(printf("ado located at va=%p pa=%x\n", ado, sgd_addr)); 354 355 snd_mtxlock(via->lock); 356 if (go == PCMTRIG_START) { 357 via_buildsgdt(ch); 358 via_wr(via, ch->base, sgd_addr, 4); 359 via_wr(via, ch->ctrl, VIA_RPCTRL_START, 1); 360 } else 361 via_wr(via, ch->ctrl, VIA_RPCTRL_TERMINATE, 1); 362 snd_mtxunlock(via->lock); 363 364 DEB(printf("viachan_trigger: go=%d\n", go)); 365 return 0; 366 } 367 368 static u_int32_t 369 viachan_getptr(kobj_t obj, void *data) 370 { 371 struct via_chinfo *ch = data; 372 struct via_info *via = ch->parent; 373 struct via_dma_op *ado; 374 bus_addr_t sgd_addr = ch->sgd_addr; 375 u_int32_t ptr, base, base1, len, seg; 376 377 ado = ch->sgd_table; 378 snd_mtxlock(via->lock); 379 base1 = via_rd(via, ch->base, 4); 380 len = via_rd(via, ch->count, 4); 381 base = via_rd(via, ch->base, 4); 382 if (base != base1) /* Avoid race hazard */ 383 len = via_rd(via, ch->count, 4); 384 snd_mtxunlock(via->lock); 385 386 DEB(printf("viachan_getptr: len / base = %x / %x\n", len, base)); 387 388 /* Base points to SGD segment to do, one past current */ 389 390 /* Determine how many segments have been done */ 391 seg = (base - sgd_addr) / sizeof(struct via_dma_op); 392 if (seg == 0) 393 seg = SEGS_PER_CHAN; 394 395 /* Now work out offset: seg less count */ 396 ptr = (seg * sndbuf_getsize(ch->buffer) / SEGS_PER_CHAN) - len; 397 if (ch->dir == PCMDIR_REC) { 398 /* DMA appears to operate on memory 'lines' of 32 bytes */ 399 /* so don't return any part line - it isn't in RAM yet */ 400 ptr = ptr & ~0x1f; 401 } 402 403 DEB(printf("return ptr=%u\n", ptr)); 404 return ptr; 405 } 406 407 static struct pcmchan_caps * 408 viachan_getcaps(kobj_t obj, void *data) 409 { 410 struct via_chinfo *ch = data; 411 struct via_info *via = ch->parent; 412 413 return (via->codec_caps & AC97_EXTCAP_VRA)? &via_vracaps : &via_caps; 414 } 415 416 static kobj_method_t viachan_methods[] = { 417 KOBJMETHOD(channel_init, viachan_init), 418 KOBJMETHOD(channel_setformat, viachan_setformat), 419 KOBJMETHOD(channel_setspeed, viachan_setspeed), 420 KOBJMETHOD(channel_setblocksize, viachan_setblocksize), 421 KOBJMETHOD(channel_trigger, viachan_trigger), 422 KOBJMETHOD(channel_getptr, viachan_getptr), 423 KOBJMETHOD(channel_getcaps, viachan_getcaps), 424 KOBJMETHOD_END 425 }; 426 CHANNEL_DECLARE(viachan); 427 428 /* -------------------------------------------------------------------- */ 429 430 static void 431 via_intr(void *p) 432 { 433 struct via_info *via = p; 434 435 /* DEB(printf("viachan_intr\n")); */ 436 /* Read channel */ 437 snd_mtxlock(via->lock); 438 if (via_rd(via, VIA_PLAY_STAT, 1) & VIA_RPSTAT_INTR) { 439 via_wr(via, VIA_PLAY_STAT, VIA_RPSTAT_INTR, 1); 440 snd_mtxunlock(via->lock); 441 chn_intr(via->pch.channel); 442 snd_mtxlock(via->lock); 443 } 444 445 /* Write channel */ 446 if (via_rd(via, VIA_RECORD_STAT, 1) & VIA_RPSTAT_INTR) { 447 via_wr(via, VIA_RECORD_STAT, VIA_RPSTAT_INTR, 1); 448 snd_mtxunlock(via->lock); 449 chn_intr(via->rch.channel); 450 return; 451 } 452 snd_mtxunlock(via->lock); 453 } 454 455 /* 456 * Probe and attach the card 457 */ 458 static int 459 via_probe(device_t dev) 460 { 461 if (pci_get_devid(dev) == VIA_PCI_ID) { 462 device_set_desc(dev, "VIA VT82C686A"); 463 return BUS_PROBE_DEFAULT; 464 } 465 return ENXIO; 466 } 467 468 469 static void 470 dma_cb(void *p, bus_dma_segment_t *bds, int a, int b) 471 { 472 struct via_info *via = (struct via_info *)p; 473 via->sgd_addr = bds->ds_addr; 474 } 475 476 477 static int 478 via_attach(device_t dev) 479 { 480 struct via_info *via = 0; 481 char status[SND_STATUSLEN]; 482 u_int32_t data, cnt; 483 484 via = kmalloc(sizeof(*via), M_DEVBUF, M_WAITOK | M_ZERO); 485 via->lock = snd_mtxcreate(device_get_nameunit(dev), 486 "snd_via82c686 softc"); 487 488 pci_enable_busmaster(dev); 489 490 /* Wake up and reset AC97 if necessary */ 491 data = pci_read_config(dev, VIA_AC97STATUS, 1); 492 493 if ((data & VIA_AC97STATUS_RDY) == 0) { 494 /* Cold reset per ac97r2.3 spec (page 95) */ 495 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */ 496 DELAY(100); /* Wait T_rst_low */ 497 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_NRST, 1); /* Assert high */ 498 DELAY(5); /* Wait T_rst2clk */ 499 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */ 500 } else { 501 /* Warm reset */ 502 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */ 503 DELAY(100); 504 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_SYNC, 1); /* Sync */ 505 DELAY(5); /* Wait T_sync_high */ 506 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */ 507 DELAY(5); /* Wait T_sync2clk */ 508 } 509 510 /* Power everything up */ 511 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_DESIRED, 1); 512 513 /* Wait for codec to become ready (largest reported delay here 310ms) */ 514 for (cnt = 0; cnt < 2000; cnt++) { 515 data = pci_read_config(dev, VIA_AC97STATUS, 1); 516 if (data & VIA_AC97STATUS_RDY) 517 break; 518 DELAY(5000); 519 } 520 521 via->regid = PCIR_BAR(0); 522 via->reg = bus_alloc_resource_any(dev, SYS_RES_IOPORT, 523 &via->regid, RF_ACTIVE); 524 if (!via->reg) { 525 device_printf(dev, "cannot allocate bus resource."); 526 goto bad; 527 } 528 via->st = rman_get_bustag(via->reg); 529 via->sh = rman_get_bushandle(via->reg); 530 531 via->bufsz = pcm_getbuffersize(dev, 4096, VIA_DEFAULT_BUFSZ, 65536); 532 533 via->irqid = 0; 534 via->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &via->irqid, 535 RF_ACTIVE | RF_SHAREABLE); 536 if (!via->irq || snd_setup_intr(dev, via->irq, INTR_MPSAFE, via_intr, via, &via->ih)) { 537 device_printf(dev, "unable to map interrupt\n"); 538 goto bad; 539 } 540 541 via_wr(via, VIA_PLAY_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1); 542 via_wr(via, VIA_RECORD_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1); 543 544 via->codec = AC97_CREATE(dev, via, via_ac97); 545 if (!via->codec) 546 goto bad; 547 548 if (mixer_init(dev, ac97_getmixerclass(), via->codec)) 549 goto bad; 550 551 via->codec_caps = ac97_getextcaps(via->codec); 552 ac97_setextmode(via->codec, 553 via->codec_caps & (AC97_EXTCAP_VRA | AC97_EXTCAP_VRM)); 554 555 /* DMA tag for buffers */ 556 if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2, 557 /*boundary*/0, 558 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 559 /*highaddr*/BUS_SPACE_MAXADDR, 560 /*maxsize*/via->bufsz, /*nsegments*/1, /*maxsegz*/0x3ffff, 561 /*flags*/0, 562 &via->parent_dmat) != 0) { 563 device_printf(dev, "unable to create dma tag\n"); 564 goto bad; 565 } 566 567 /* 568 * DMA tag for SGD table. The 686 uses scatter/gather DMA and 569 * requires a list in memory of work to do. We need only 16 bytes 570 * for this list, and it is wasteful to allocate 16K. 571 */ 572 if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2, 573 /*boundary*/0, 574 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 575 /*highaddr*/BUS_SPACE_MAXADDR, 576 /*maxsize*/NSEGS * sizeof(struct via_dma_op), 577 /*nsegments*/1, /*maxsegz*/0x3ffff, 578 /*flags*/0, 579 &via->sgd_dmat) != 0) { 580 device_printf(dev, "unable to create dma tag\n"); 581 goto bad; 582 } 583 584 if (bus_dmamem_alloc(via->sgd_dmat, (void **)&via->sgd_table, 585 BUS_DMA_NOWAIT, &via->sgd_dmamap) != 0) 586 goto bad; 587 if (bus_dmamap_load(via->sgd_dmat, via->sgd_dmamap, via->sgd_table, 588 NSEGS * sizeof(struct via_dma_op), dma_cb, via, 0) != 0) 589 goto bad; 590 591 ksnprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld %s", 592 rman_get_start(via->reg), rman_get_start(via->irq), 593 PCM_KLDSTRING(snd_via82c686)); 594 595 /* Register */ 596 if (pcm_register(dev, via, 1, 1)) goto bad; 597 pcm_addchan(dev, PCMDIR_PLAY, &viachan_class, via); 598 pcm_addchan(dev, PCMDIR_REC, &viachan_class, via); 599 pcm_setstatus(dev, status); 600 return 0; 601 bad: 602 if (via->codec) ac97_destroy(via->codec); 603 if (via->reg) bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg); 604 if (via->ih) bus_teardown_intr(dev, via->irq, via->ih); 605 if (via->irq) bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq); 606 if (via->parent_dmat) bus_dma_tag_destroy(via->parent_dmat); 607 if (via->sgd_addr) bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap); 608 if (via->sgd_table) bus_dmamem_free(via->sgd_dmat, via->sgd_table, via->sgd_dmamap); 609 if (via->sgd_dmat) bus_dma_tag_destroy(via->sgd_dmat); 610 if (via->lock) snd_mtxfree(via->lock); 611 if (via) kfree(via, M_DEVBUF); 612 return ENXIO; 613 } 614 615 static int 616 via_detach(device_t dev) 617 { 618 int r; 619 struct via_info *via = 0; 620 621 r = pcm_unregister(dev); 622 if (r) 623 return r; 624 625 via = pcm_getdevinfo(dev); 626 bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg); 627 bus_teardown_intr(dev, via->irq, via->ih); 628 bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq); 629 bus_dma_tag_destroy(via->parent_dmat); 630 bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap); 631 bus_dmamem_free(via->sgd_dmat, via->sgd_table, via->sgd_dmamap); 632 bus_dma_tag_destroy(via->sgd_dmat); 633 snd_mtxfree(via->lock); 634 kfree(via, M_DEVBUF); 635 return 0; 636 } 637 638 639 static device_method_t via_methods[] = { 640 DEVMETHOD(device_probe, via_probe), 641 DEVMETHOD(device_attach, via_attach), 642 DEVMETHOD(device_detach, via_detach), 643 { 0, 0} 644 }; 645 646 static driver_t via_driver = { 647 "pcm", 648 via_methods, 649 PCM_SOFTC_SIZE, 650 }; 651 652 DRIVER_MODULE(snd_via82c686, pci, via_driver, pcm_devclass, NULL, NULL); 653 MODULE_DEPEND(snd_via82c686, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER); 654 MODULE_VERSION(snd_via82c686, 1); 655