1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #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 mtx *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 static __inline void 123 via_wr(struct via_info *via, int regno, u_int32_t data, int size) 124 { 125 126 switch (size) { 127 case 1: 128 bus_space_write_1(via->st, via->sh, regno, data); 129 break; 130 case 2: 131 bus_space_write_2(via->st, via->sh, regno, data); 132 break; 133 case 4: 134 bus_space_write_4(via->st, via->sh, regno, data); 135 break; 136 } 137 } 138 139 /* -------------------------------------------------------------------- */ 140 /* Codec interface */ 141 142 static int 143 via_waitready_codec(struct via_info *via) 144 { 145 int i; 146 147 /* poll until codec not busy */ 148 for (i = 0; (i < TIMEOUT) && 149 (via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_BUSY); i++) 150 DELAY(1); 151 if (i >= TIMEOUT) { 152 printf("via: codec busy\n"); 153 return 1; 154 } 155 156 return 0; 157 } 158 159 static int 160 via_waitvalid_codec(struct via_info *via) 161 { 162 int i; 163 164 /* poll until codec valid */ 165 for (i = 0; (i < TIMEOUT) && 166 !(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_PRIVALID); i++) 167 DELAY(1); 168 if (i >= TIMEOUT) { 169 printf("via: codec invalid\n"); 170 return 1; 171 } 172 173 return 0; 174 } 175 176 static int 177 via_write_codec(kobj_t obj, void *addr, int reg, u_int32_t val) 178 { 179 struct via_info *via = addr; 180 181 if (via_waitready_codec(via)) return -1; 182 183 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_INDEX(reg) | val, 4); 184 185 return 0; 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 KOBJMETHOD_END 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 = sndbuf_getbufaddr(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; 247 248 snd_mtxlock(via->lock); 249 if (dir == PCMDIR_PLAY) { 250 ch = &via->pch; 251 ch->base = VIA_PLAY_DMAOPS_BASE; 252 ch->count = VIA_PLAY_DMAOPS_COUNT; 253 ch->ctrl = VIA_PLAY_CONTROL; 254 ch->mode = VIA_PLAY_MODE; 255 ch->sgd_addr = via->sgd_addr; 256 ch->sgd_table = &via->sgd_table[0]; 257 } else { 258 ch = &via->rch; 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 ch->sgd_addr = via->sgd_addr + sizeof(struct via_dma_op) * SEGS_PER_CHAN; 264 ch->sgd_table = &via->sgd_table[SEGS_PER_CHAN]; 265 } 266 267 ch->parent = via; 268 ch->channel = c; 269 ch->buffer = b; 270 ch->dir = dir; 271 snd_mtxunlock(via->lock); 272 273 if (sndbuf_alloc(ch->buffer, via->parent_dmat, 0, via->bufsz) != 0) 274 return NULL; 275 276 return ch; 277 } 278 279 static int 280 viachan_setformat(kobj_t obj, void *data, u_int32_t format) 281 { 282 struct via_chinfo *ch = data; 283 struct via_info *via = ch->parent; 284 int mode, mode_set; 285 286 mode_set = 0; 287 if (AFMT_CHANNEL(format) > 1) 288 mode_set |= VIA_RPMODE_STEREO; 289 if (format & AFMT_S16_LE) 290 mode_set |= VIA_RPMODE_16BIT; 291 292 DEB(printf("set format: dir = %d, format=%x\n", ch->dir, format)); 293 snd_mtxlock(via->lock); 294 mode = via_rd(via, ch->mode, 1); 295 mode &= ~(VIA_RPMODE_16BIT | VIA_RPMODE_STEREO); 296 mode |= mode_set; 297 via_wr(via, ch->mode, mode, 1); 298 snd_mtxunlock(via->lock); 299 300 return 0; 301 } 302 303 static u_int32_t 304 viachan_setspeed(kobj_t obj, void *data, u_int32_t speed) 305 { 306 struct via_chinfo *ch = data; 307 struct via_info *via = ch->parent; 308 int reg; 309 310 /* 311 * Basic AC'97 defines a 48 kHz sample rate only. For other rates, 312 * upsampling is required. 313 * 314 * The VT82C686A does not perform upsampling, and neither do we. 315 * If the codec supports variable-rate audio (i.e. does the upsampling 316 * itself), then negotiate the rate with the codec. Otherwise, 317 * return 48 kHz cuz that's all you got. 318 */ 319 if (via->codec_caps & AC97_EXTCAP_VRA) { 320 reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE; 321 return ac97_setrate(via->codec, reg, speed); 322 } else 323 return 48000; 324 } 325 326 static u_int32_t 327 viachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize) 328 { 329 struct via_chinfo *ch = data; 330 331 ch->blksz = blocksize; 332 sndbuf_resize(ch->buffer, SEGS_PER_CHAN, ch->blksz); 333 334 return ch->blksz; 335 } 336 337 static int 338 viachan_trigger(kobj_t obj, void *data, int go) 339 { 340 struct via_chinfo *ch = data; 341 struct via_info *via = ch->parent; 342 bus_addr_t sgd_addr = ch->sgd_addr; 343 344 if (!PCMTRIG_COMMON(go)) 345 return 0; 346 347 DEB(printf("ado located at va=%p pa=%x\n", ch->sgd_table, sgd_addr)); 348 349 snd_mtxlock(via->lock); 350 if (go == PCMTRIG_START) { 351 via_buildsgdt(ch); 352 via_wr(via, ch->base, sgd_addr, 4); 353 via_wr(via, ch->ctrl, VIA_RPCTRL_START, 1); 354 } else 355 via_wr(via, ch->ctrl, VIA_RPCTRL_TERMINATE, 1); 356 snd_mtxunlock(via->lock); 357 358 DEB(printf("viachan_trigger: go=%d\n", go)); 359 return 0; 360 } 361 362 static u_int32_t 363 viachan_getptr(kobj_t obj, void *data) 364 { 365 struct via_chinfo *ch = data; 366 struct via_info *via = ch->parent; 367 bus_addr_t sgd_addr = ch->sgd_addr; 368 u_int32_t ptr, base, base1, len, seg; 369 370 snd_mtxlock(via->lock); 371 base1 = via_rd(via, ch->base, 4); 372 len = via_rd(via, ch->count, 4); 373 base = via_rd(via, ch->base, 4); 374 if (base != base1) /* Avoid race hazard */ 375 len = via_rd(via, ch->count, 4); 376 snd_mtxunlock(via->lock); 377 378 DEB(printf("viachan_getptr: len / base = %x / %x\n", len, base)); 379 380 /* Base points to SGD segment to do, one past current */ 381 382 /* Determine how many segments have been done */ 383 seg = (base - sgd_addr) / sizeof(struct via_dma_op); 384 if (seg == 0) 385 seg = SEGS_PER_CHAN; 386 387 /* Now work out offset: seg less count */ 388 ptr = (seg * sndbuf_getsize(ch->buffer) / SEGS_PER_CHAN) - len; 389 if (ch->dir == PCMDIR_REC) { 390 /* DMA appears to operate on memory 'lines' of 32 bytes */ 391 /* so don't return any part line - it isn't in RAM yet */ 392 ptr = ptr & ~0x1f; 393 } 394 395 DEB(printf("return ptr=%u\n", ptr)); 396 return ptr; 397 } 398 399 static struct pcmchan_caps * 400 viachan_getcaps(kobj_t obj, void *data) 401 { 402 struct via_chinfo *ch = data; 403 struct via_info *via = ch->parent; 404 405 return (via->codec_caps & AC97_EXTCAP_VRA)? &via_vracaps : &via_caps; 406 } 407 408 static kobj_method_t viachan_methods[] = { 409 KOBJMETHOD(channel_init, viachan_init), 410 KOBJMETHOD(channel_setformat, viachan_setformat), 411 KOBJMETHOD(channel_setspeed, viachan_setspeed), 412 KOBJMETHOD(channel_setblocksize, viachan_setblocksize), 413 KOBJMETHOD(channel_trigger, viachan_trigger), 414 KOBJMETHOD(channel_getptr, viachan_getptr), 415 KOBJMETHOD(channel_getcaps, viachan_getcaps), 416 KOBJMETHOD_END 417 }; 418 CHANNEL_DECLARE(viachan); 419 420 /* -------------------------------------------------------------------- */ 421 422 static void 423 via_intr(void *p) 424 { 425 struct via_info *via = p; 426 427 /* DEB(printf("viachan_intr\n")); */ 428 /* Read channel */ 429 snd_mtxlock(via->lock); 430 if (via_rd(via, VIA_PLAY_STAT, 1) & VIA_RPSTAT_INTR) { 431 via_wr(via, VIA_PLAY_STAT, VIA_RPSTAT_INTR, 1); 432 snd_mtxunlock(via->lock); 433 chn_intr(via->pch.channel); 434 snd_mtxlock(via->lock); 435 } 436 437 /* Write channel */ 438 if (via_rd(via, VIA_RECORD_STAT, 1) & VIA_RPSTAT_INTR) { 439 via_wr(via, VIA_RECORD_STAT, VIA_RPSTAT_INTR, 1); 440 snd_mtxunlock(via->lock); 441 chn_intr(via->rch.channel); 442 return; 443 } 444 snd_mtxunlock(via->lock); 445 } 446 447 /* 448 * Probe and attach the card 449 */ 450 static int 451 via_probe(device_t dev) 452 { 453 if (pci_get_devid(dev) == VIA_PCI_ID) { 454 device_set_desc(dev, "VIA VT82C686A"); 455 return BUS_PROBE_DEFAULT; 456 } 457 return ENXIO; 458 } 459 460 static void 461 dma_cb(void *p, bus_dma_segment_t *bds, int a, int b) 462 { 463 struct via_info *via = (struct via_info *)p; 464 via->sgd_addr = bds->ds_addr; 465 } 466 467 static int 468 via_attach(device_t dev) 469 { 470 struct via_info *via = NULL; 471 char status[SND_STATUSLEN]; 472 u_int32_t data, cnt; 473 474 via = malloc(sizeof(*via), M_DEVBUF, M_WAITOK | M_ZERO); 475 via->lock = snd_mtxcreate(device_get_nameunit(dev), 476 "snd_via82c686 softc"); 477 478 pci_enable_busmaster(dev); 479 480 /* Wake up and reset AC97 if necessary */ 481 data = pci_read_config(dev, VIA_AC97STATUS, 1); 482 483 if ((data & VIA_AC97STATUS_RDY) == 0) { 484 /* Cold reset per ac97r2.3 spec (page 95) */ 485 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */ 486 DELAY(100); /* Wait T_rst_low */ 487 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_NRST, 1); /* Assert high */ 488 DELAY(5); /* Wait T_rst2clk */ 489 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */ 490 } else { 491 /* Warm reset */ 492 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */ 493 DELAY(100); 494 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_SYNC, 1); /* Sync */ 495 DELAY(5); /* Wait T_sync_high */ 496 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */ 497 DELAY(5); /* Wait T_sync2clk */ 498 } 499 500 /* Power everything up */ 501 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_DESIRED, 1); 502 503 /* Wait for codec to become ready (largest reported delay here 310ms) */ 504 for (cnt = 0; cnt < 2000; cnt++) { 505 data = pci_read_config(dev, VIA_AC97STATUS, 1); 506 if (data & VIA_AC97STATUS_RDY) 507 break; 508 DELAY(5000); 509 } 510 511 via->regid = PCIR_BAR(0); 512 via->reg = bus_alloc_resource_any(dev, SYS_RES_IOPORT, 513 &via->regid, RF_ACTIVE); 514 if (!via->reg) { 515 device_printf(dev, "cannot allocate bus resource."); 516 goto bad; 517 } 518 via->st = rman_get_bustag(via->reg); 519 via->sh = rman_get_bushandle(via->reg); 520 521 via->bufsz = pcm_getbuffersize(dev, 4096, VIA_DEFAULT_BUFSZ, 65536); 522 523 via->irqid = 0; 524 via->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &via->irqid, 525 RF_ACTIVE | RF_SHAREABLE); 526 if (!via->irq || snd_setup_intr(dev, via->irq, INTR_MPSAFE, via_intr, via, &via->ih)) { 527 device_printf(dev, "unable to map interrupt\n"); 528 goto bad; 529 } 530 531 via_wr(via, VIA_PLAY_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1); 532 via_wr(via, VIA_RECORD_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1); 533 534 via->codec = AC97_CREATE(dev, via, via_ac97); 535 if (!via->codec) 536 goto bad; 537 538 if (mixer_init(dev, ac97_getmixerclass(), via->codec)) 539 goto bad; 540 541 via->codec_caps = ac97_getextcaps(via->codec); 542 ac97_setextmode(via->codec, 543 via->codec_caps & (AC97_EXTCAP_VRA | AC97_EXTCAP_VRM)); 544 545 /* DMA tag for buffers */ 546 if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2, 547 /*boundary*/0, 548 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 549 /*highaddr*/BUS_SPACE_MAXADDR, 550 /*filter*/NULL, /*filterarg*/NULL, 551 /*maxsize*/via->bufsz, /*nsegments*/1, /*maxsegz*/0x3ffff, 552 /*flags*/0, /*lockfunc*/NULL, 553 /*lockarg*/NULL, &via->parent_dmat) != 0) { 554 device_printf(dev, "unable to create dma tag\n"); 555 goto bad; 556 } 557 558 /* 559 * DMA tag for SGD table. The 686 uses scatter/gather DMA and 560 * requires a list in memory of work to do. We need only 16 bytes 561 * for this list, and it is wasteful to allocate 16K. 562 */ 563 if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2, 564 /*boundary*/0, 565 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 566 /*highaddr*/BUS_SPACE_MAXADDR, 567 /*filter*/NULL, /*filterarg*/NULL, 568 /*maxsize*/NSEGS * sizeof(struct via_dma_op), 569 /*nsegments*/1, /*maxsegz*/0x3ffff, 570 /*flags*/0, /*lockfunc*/NULL, 571 /*lockarg*/NULL, &via->sgd_dmat) != 0) { 572 device_printf(dev, "unable to create dma tag\n"); 573 goto bad; 574 } 575 576 if (bus_dmamem_alloc(via->sgd_dmat, (void **)&via->sgd_table, 577 BUS_DMA_NOWAIT, &via->sgd_dmamap) != 0) 578 goto bad; 579 if (bus_dmamap_load(via->sgd_dmat, via->sgd_dmamap, via->sgd_table, 580 NSEGS * sizeof(struct via_dma_op), dma_cb, via, 0) != 0) 581 goto bad; 582 583 snprintf(status, SND_STATUSLEN, "port 0x%jx irq %jd on %s", 584 rman_get_start(via->reg), rman_get_start(via->irq), 585 device_get_nameunit(device_get_parent(dev))); 586 587 /* Register */ 588 if (pcm_register(dev, via, 1, 1)) goto bad; 589 pcm_addchan(dev, PCMDIR_PLAY, &viachan_class, via); 590 pcm_addchan(dev, PCMDIR_REC, &viachan_class, via); 591 pcm_setstatus(dev, status); 592 return 0; 593 bad: 594 if (via->codec) ac97_destroy(via->codec); 595 if (via->reg) bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg); 596 if (via->ih) bus_teardown_intr(dev, via->irq, via->ih); 597 if (via->irq) bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq); 598 if (via->parent_dmat) bus_dma_tag_destroy(via->parent_dmat); 599 if (via->sgd_addr) bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap); 600 if (via->sgd_table) bus_dmamem_free(via->sgd_dmat, via->sgd_table, via->sgd_dmamap); 601 if (via->sgd_dmat) bus_dma_tag_destroy(via->sgd_dmat); 602 if (via->lock) snd_mtxfree(via->lock); 603 if (via) free(via, M_DEVBUF); 604 return ENXIO; 605 } 606 607 static int 608 via_detach(device_t dev) 609 { 610 int r; 611 struct via_info *via = NULL; 612 613 r = pcm_unregister(dev); 614 if (r) 615 return r; 616 617 via = pcm_getdevinfo(dev); 618 bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg); 619 bus_teardown_intr(dev, via->irq, via->ih); 620 bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq); 621 bus_dma_tag_destroy(via->parent_dmat); 622 bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap); 623 bus_dmamem_free(via->sgd_dmat, via->sgd_table, via->sgd_dmamap); 624 bus_dma_tag_destroy(via->sgd_dmat); 625 snd_mtxfree(via->lock); 626 free(via, M_DEVBUF); 627 return 0; 628 } 629 630 static device_method_t via_methods[] = { 631 DEVMETHOD(device_probe, via_probe), 632 DEVMETHOD(device_attach, via_attach), 633 DEVMETHOD(device_detach, via_detach), 634 { 0, 0} 635 }; 636 637 static driver_t via_driver = { 638 "pcm", 639 via_methods, 640 PCM_SOFTC_SIZE, 641 }; 642 643 DRIVER_MODULE(snd_via82c686, pci, via_driver, 0, 0); 644 MODULE_DEPEND(snd_via82c686, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER); 645 MODULE_VERSION(snd_via82c686, 1); 646