sys/dev/sound/pci/via82c686.c

   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 1.34.2.2 2007/04/26 08:21:44 ariff Exp $
  27  * $DragonFly: src/sys/dev/sound/pci/via82c686.c,v 1.10 2007/06/16 20:07:19 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 1.10 2007/06/16 20:07:19 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         bus_addr_t sgd_addr;
  70         int dir, blksz;
  71         int base, count, mode, ctrl;
  72 };
  73
  74 struct via_info {
  75         bus_space_tag_t st;
  76         bus_space_handle_t sh;
  77         bus_dma_tag_t parent_dmat;
  78         bus_dma_tag_t sgd_dmat;
  79         bus_dmamap_t sgd_dmamap;
  80         bus_addr_t sgd_addr;
  81
  82         struct resource *reg, *irq;
  83         int regid, irqid;
  84         void *ih;
  85         struct ac97_info *codec;
  86
  87         unsigned int bufsz;
  88
  89         struct via_chinfo pch, rch;
  90         struct via_dma_op *sgd_table;
  91         u_int16_t codec_caps;
  92         sndlock_t       lock;
  93 };
  94
  95 static u_int32_t via_fmt[] = {
  96         AFMT_U8,
  97         AFMT_STEREO | AFMT_U8,
  98         AFMT_S16_LE,
  99         AFMT_STEREO | AFMT_S16_LE,
 100         0
 101 };
 102 static struct pcmchan_caps via_vracaps = {4000, 48000, via_fmt, 0};
 103 static struct pcmchan_caps via_caps = {48000, 48000, via_fmt, 0};
 104
 105 static __inline u_int32_t
 106 via_rd(struct via_info *via, int regno, int size)
 107 {
 108
 109         switch (size) {
 110         case 1:
 111                 return bus_space_read_1(via->st, via->sh, regno);
 112         case 2:
 113                 return bus_space_read_2(via->st, via->sh, regno);
 114         case 4:
 115                 return bus_space_read_4(via->st, via->sh, regno);
 116         default:
 117                 return 0xFFFFFFFF;
 118         }
 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                 kprintf("via: codec busy\n");
 153                 return 1;
 154         }
 155
 156         return 0;
 157 }
 158
 159
 160 static int
 161 via_waitvalid_codec(struct via_info *via)
 162 {
 163         int i;
 164
 165         /* poll until codec valid */
 166         for (i = 0; (i < TIMEOUT) &&
 167             !(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_PRIVALID); i++)
 168                     DELAY(1);
 169         if (i >= TIMEOUT) {
 170                 kprintf("via: codec invalid\n");
 171                 return 1;
 172         }
 173
 174         return 0;
 175 }
 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
 191 static int
 192 via_read_codec(kobj_t obj, void *addr, int reg)
 193 {
 194         struct via_info *via = addr;
 195
 196         if (via_waitready_codec(via))
 197                 return -1;
 198
 199         via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_READ | VIA_CODEC_INDEX(reg),4);
 200
 201         if (via_waitready_codec(via))
 202                 return -1;
 203
 204         if (via_waitvalid_codec(via))
 205                 return -1;
 206
 207         return via_rd(via, VIA_CODEC_CTL, 2);
 208 }
 209
 210 static kobj_method_t via_ac97_methods[] = {
 211         KOBJMETHOD(ac97_read,           via_read_codec),
 212         KOBJMETHOD(ac97_write,          via_write_codec),
 213         { 0, 0 }
 214 };
 215 AC97_DECLARE(via_ac97);
 216
 217 /* -------------------------------------------------------------------- */
 218
 219 static int
 220 via_buildsgdt(struct via_chinfo *ch)
 221 {
 222         u_int32_t phys_addr, flag;
 223         int i, segs, seg_size;
 224
 225         /*
 226          *  Build the scatter/gather DMA (SGD) table.
 227          *  There are four slots in the table: two for play, two for record.
 228          *  This creates two half-buffers, one of which is playing; the other
 229          *  is feeding.
 230          */
 231         seg_size = ch->blksz;
 232         segs = sndbuf_getsize(ch->buffer) / seg_size;
 233         phys_addr = sndbuf_getbufaddr(ch->buffer);
 234
 235         for (i = 0; i < segs; i++) {
 236                 flag = (i == segs - 1)? VIA_DMAOP_EOL : VIA_DMAOP_FLAG;
 237                 ch->sgd_table[i].ptr = phys_addr + (i * seg_size);
 238                 ch->sgd_table[i].flags = flag | seg_size;
 239         }
 240
 241         return 0;
 242 }
 243
 244 /* channel interface */
 245 static void *
 246 viachan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
 247 {
 248         struct via_info *via = devinfo;
 249         struct via_chinfo *ch;
 250
 251         snd_mtxlock(via->lock);
 252         if (dir == PCMDIR_PLAY) {
 253                 ch = &via->pch;
 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                 ch->sgd_addr = via->sgd_addr;
 259                 ch->sgd_table = &via->sgd_table[0];
 260         } else {
 261                 ch = &via->rch;
 262                 ch->base = VIA_RECORD_DMAOPS_BASE;
 263                 ch->count = VIA_RECORD_DMAOPS_COUNT;
 264                 ch->ctrl = VIA_RECORD_CONTROL;
 265                 ch->mode = VIA_RECORD_MODE;
 266                 ch->sgd_addr = via->sgd_addr + sizeof(struct via_dma_op) * SEGS_PER_CHAN;
 267                 ch->sgd_table = &via->sgd_table[SEGS_PER_CHAN];
 268         }
 269
 270         ch->parent = via;
 271         ch->channel = c;
 272         ch->buffer = b;
 273         ch->dir = dir;
 274         snd_mtxunlock(via->lock);
 275
 276         if (sndbuf_alloc(ch->buffer, via->parent_dmat, via->bufsz) != 0)
 277                 return NULL;
 278
 279         return ch;
 280 }
 281
 282 static int
 283 viachan_setformat(kobj_t obj, void *data, u_int32_t format)
 284 {
 285         struct via_chinfo *ch = data;
 286         struct via_info *via = ch->parent;
 287         int mode, mode_set;
 288
 289         mode_set = 0;
 290         if (format & AFMT_STEREO)
 291                 mode_set |= VIA_RPMODE_STEREO;
 292         if (format & AFMT_S16_LE)
 293                 mode_set |= VIA_RPMODE_16BIT;
 294
 295         DEB(kprintf("set format: dir = %d, format=%x\n", ch->dir, format));
 296         snd_mtxlock(via->lock);
 297         mode = via_rd(via, ch->mode, 1);
 298         mode &= ~(VIA_RPMODE_16BIT | VIA_RPMODE_STEREO);
 299         mode |= mode_set;
 300         via_wr(via, ch->mode, mode, 1);
 301         snd_mtxunlock(via->lock);
 302
 303         return 0;
 304 }
 305
 306 static int
 307 viachan_setspeed(kobj_t obj, void *data, u_int32_t speed)
 308 {
 309         struct via_chinfo *ch = data;
 310         struct via_info *via = ch->parent;
 311         int reg;
 312
 313         /*
 314          *  Basic AC'97 defines a 48 kHz sample rate only.  For other rates,
 315          *  upsampling is required.
 316          *
 317          *  The VT82C686A does not perform upsampling, and neither do we.
 318          *  If the codec supports variable-rate audio (i.e. does the upsampling
 319          *  itself), then negotiate the rate with the codec.  Otherwise,
 320          *  return 48 kHz cuz that's all you got.
 321          */
 322         if (via->codec_caps & AC97_EXTCAP_VRA) {
 323                 reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE;
 324                 return ac97_setrate(via->codec, reg, speed);
 325         } else
 326                 return 48000;
 327 }
 328
 329 static int
 330 viachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
 331 {
 332         struct via_chinfo *ch = data;
 333
 334         ch->blksz = blocksize;
 335         sndbuf_resize(ch->buffer, SEGS_PER_CHAN, ch->blksz);
 336
 337         return ch->blksz;
 338 }
 339
 340 static int
 341 viachan_trigger(kobj_t obj, void *data, int go)
 342 {
 343         struct via_chinfo *ch = data;
 344         struct via_info *via = ch->parent;
 345         struct via_dma_op *ado;
 346         bus_addr_t sgd_addr = ch->sgd_addr;
 347
 348         if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
 349                 return 0;
 350
 351         ado = ch->sgd_table;
 352         DEB(kprintf("ado located at va=%p pa=%x\n", ado, sgd_addr));
 353
 354         snd_mtxlock(via->lock);
 355         if (go == PCMTRIG_START) {
 356                 via_buildsgdt(ch);
 357                 via_wr(via, ch->base, sgd_addr, 4);
 358                 via_wr(via, ch->ctrl, VIA_RPCTRL_START, 1);
 359         } else
 360                 via_wr(via, ch->ctrl, VIA_RPCTRL_TERMINATE, 1);
 361         snd_mtxunlock(via->lock);
 362
 363         DEB(kprintf("viachan_trigger: go=%d\n", go));
 364         return 0;
 365 }
 366
 367 static int
 368 viachan_getptr(kobj_t obj, void *data)
 369 {
 370         struct via_chinfo *ch = data;
 371         struct via_info *via = ch->parent;
 372         struct via_dma_op *ado;
 373         bus_addr_t sgd_addr = ch->sgd_addr;
 374         int ptr, base, base1, len, seg;
 375
 376         ado = ch->sgd_table;
 377         snd_mtxlock(via->lock);
 378         base1 = via_rd(via, ch->base, 4);
 379         len = via_rd(via, ch->count, 4);
 380         base = via_rd(via, ch->base, 4);
 381         if (base != base1)      /* Avoid race hazard */
 382                 len = via_rd(via, ch->count, 4);
 383         snd_mtxunlock(via->lock);
 384
 385         DEB(kprintf("viachan_getptr: len / base = %x / %x\n", len, base));
 386
 387         /* Base points to SGD segment to do, one past current */
 388
 389         /* Determine how many segments have been done */
 390         seg = (base - sgd_addr) / sizeof(struct via_dma_op);
 391         if (seg == 0)
 392                 seg = SEGS_PER_CHAN;
 393
 394         /* Now work out offset: seg less count */
 395         ptr = (seg * sndbuf_getsize(ch->buffer) / SEGS_PER_CHAN) - len;
 396         if (ch->dir == PCMDIR_REC) {
 397                 /* DMA appears to operate on memory 'lines' of 32 bytes */
 398                 /* so don't return any part line - it isn't in RAM yet  */
 399                 ptr = ptr & ~0x1f;
 400         }
 401
 402         DEB(kprintf("return ptr=%d\n", ptr));
 403         return ptr;
 404 }
 405
 406 static struct pcmchan_caps *
 407 viachan_getcaps(kobj_t obj, void *data)
 408 {
 409         struct via_chinfo *ch = data;
 410         struct via_info *via = ch->parent;
 411
 412         return (via->codec_caps & AC97_EXTCAP_VRA)? &via_vracaps : &via_caps;
 413 }
 414
 415 static kobj_method_t viachan_methods[] = {
 416         KOBJMETHOD(channel_init,                viachan_init),
 417         KOBJMETHOD(channel_setformat,           viachan_setformat),
 418         KOBJMETHOD(channel_setspeed,            viachan_setspeed),
 419         KOBJMETHOD(channel_setblocksize,        viachan_setblocksize),
 420         KOBJMETHOD(channel_trigger,             viachan_trigger),
 421         KOBJMETHOD(channel_getptr,              viachan_getptr),
 422         KOBJMETHOD(channel_getcaps,             viachan_getcaps),
 423         { 0, 0 }
 424 };
 425 CHANNEL_DECLARE(viachan);
 426
 427 /* -------------------------------------------------------------------- */
 428
 429 static void
 430 via_intr(void *p)
 431 {
 432         struct via_info *via = p;
 433
 434         /* DEB(kprintf("viachan_intr\n")); */
 435         /* Read channel */
 436         snd_mtxlock(via->lock);
 437         if (via_rd(via, VIA_PLAY_STAT, 1) & VIA_RPSTAT_INTR) {
 438                 via_wr(via, VIA_PLAY_STAT, VIA_RPSTAT_INTR, 1);
 439                 snd_mtxunlock(via->lock);
 440                 chn_intr(via->pch.channel);
 441                 snd_mtxlock(via->lock);
 442         }
 443
 444         /* Write channel */
 445         if (via_rd(via, VIA_RECORD_STAT, 1) & VIA_RPSTAT_INTR) {
 446                 via_wr(via, VIA_RECORD_STAT, VIA_RPSTAT_INTR, 1);
 447                 snd_mtxunlock(via->lock);
 448                 chn_intr(via->rch.channel);
 449                 return;
 450         }
 451         snd_mtxunlock(via->lock);
 452 }
 453
 454 /*
 455  *  Probe and attach the card
 456  */
 457 static int
 458 via_probe(device_t dev)
 459 {
 460         if (pci_get_devid(dev) == VIA_PCI_ID) {
 461                 device_set_desc(dev, "VIA VT82C686A");
 462                 return BUS_PROBE_DEFAULT;
 463         }
 464         return ENXIO;
 465 }
 466
 467
 468 static void
 469 dma_cb(void *p, bus_dma_segment_t *bds, int a, int b)
 470 {
 471         struct via_info *via = (struct via_info *)p;
 472         via->sgd_addr = bds->ds_addr;
 473 }
 474
 475
 476 static int
 477 via_attach(device_t dev)
 478 {
 479         struct via_info *via = 0;
 480         char status[SND_STATUSLEN];
 481         u_int32_t data, cnt;
 482
 483         if ((via = kmalloc(sizeof *via, M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) {
 484                 device_printf(dev, "cannot allocate softc\n");
 485                 return ENXIO;
 486         }
 487         via->lock = snd_mtxcreate(device_get_nameunit(dev), "sound softc");
 488
 489         /* Get resources */
 490         data = pci_read_config(dev, PCIR_COMMAND, 2);
 491         data |= (PCIM_CMD_PORTEN | PCIM_CMD_BUSMASTEREN);
 492         pci_write_config(dev, PCIR_COMMAND, data, 2);
 493         data = pci_read_config(dev, PCIR_COMMAND, 2);
 494
 495         /* Wake up and reset AC97 if necessary */
 496         data = pci_read_config(dev, VIA_AC97STATUS, 1);
 497
 498         if ((data & VIA_AC97STATUS_RDY) == 0) {
 499                 /* Cold reset per ac97r2.3 spec (page 95) */
 500                 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1);                        /* Assert low */
 501                 DELAY(100);                                                                     /* Wait T_rst_low */
 502                 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_NRST, 1);      /* Assert high */
 503                 DELAY(5);                                                                       /* Wait T_rst2clk */
 504                 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1);                        /* Assert low */
 505         } else {
 506                 /* Warm reset */
 507                 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1);                        /* Force no sync */
 508                 DELAY(100);
 509                 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_SYNC, 1);      /* Sync */
 510                 DELAY(5);                                                                       /* Wait T_sync_high */
 511                 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1);                        /* Force no sync */
 512                 DELAY(5);                                                                       /* Wait T_sync2clk */
 513         }
 514
 515         /* Power everything up */
 516         pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_DESIRED, 1);
 517
 518         /* Wait for codec to become ready (largest reported delay here 310ms) */
 519         for (cnt = 0; cnt < 2000; cnt++) {
 520                 data = pci_read_config(dev, VIA_AC97STATUS, 1);
 521                 if (data & VIA_AC97STATUS_RDY)
 522                         break;
 523                 DELAY(5000);
 524         }
 525
 526         via->regid = PCIR_BAR(0);
 527         via->reg = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
 528                 &via->regid, RF_ACTIVE);
 529         if (!via->reg) {
 530                 device_printf(dev, "cannot allocate bus resource.");
 531                 goto bad;
 532         }
 533         via->st = rman_get_bustag(via->reg);
 534         via->sh = rman_get_bushandle(via->reg);
 535
 536         via->bufsz = pcm_getbuffersize(dev, 4096, VIA_DEFAULT_BUFSZ, 65536);
 537
 538         via->irqid = 0;
 539         via->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &via->irqid,
 540                 RF_ACTIVE | RF_SHAREABLE);
 541         if (!via->irq || snd_setup_intr(dev, via->irq, INTR_MPSAFE, via_intr, via, &via->ih)) {
 542                 device_printf(dev, "unable to map interrupt\n");
 543                 goto bad;
 544         }
 545
 546         via_wr(via, VIA_PLAY_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
 547         via_wr(via, VIA_RECORD_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
 548
 549         via->codec = AC97_CREATE(dev, via, via_ac97);
 550         if (!via->codec)
 551                 goto bad;
 552
 553         if (mixer_init(dev, ac97_getmixerclass(), via->codec))
 554                 goto bad;
 555
 556         via->codec_caps = ac97_getextcaps(via->codec);
 557         ac97_setextmode(via->codec,
 558                         via->codec_caps & (AC97_EXTCAP_VRA | AC97_EXTCAP_VRM));
 559
 560         /* DMA tag for buffers */
 561         if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0,
 562                 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
 563                 /*highaddr*/BUS_SPACE_MAXADDR,
 564                 /*filter*/NULL, /*filterarg*/NULL,
 565                 /*maxsize*/via->bufsz, /*nsegments*/1, /*maxsegz*/0x3ffff,
 566                 /*flags*/0,
 567                 &via->parent_dmat) != 0) {
 568                 device_printf(dev, "unable to create dma tag\n");
 569                 goto bad;
 570         }
 571
 572         /*
 573          *  DMA tag for SGD table.  The 686 uses scatter/gather DMA and
 574          *  requires a list in memory of work to do.  We need only 16 bytes
 575          *  for this list, and it is wasteful to allocate 16K.
 576          */
 577         if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0,
 578                 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
 579                 /*highaddr*/BUS_SPACE_MAXADDR,
 580                 /*filter*/NULL, /*filterarg*/NULL,
 581                 /*maxsize*/NSEGS * sizeof(struct via_dma_op),
 582                 /*nsegments*/1, /*maxsegz*/0x3ffff,
 583                 /*flags*/0,
 584                 &via->sgd_dmat) != 0) {
 585                 device_printf(dev, "unable to create dma tag\n");
 586                 goto bad;
 587         }
 588
 589         if (bus_dmamem_alloc(via->sgd_dmat, (void **)&via->sgd_table,
 590             BUS_DMA_NOWAIT, &via->sgd_dmamap) != 0)
 591                 goto bad;
 592         if (bus_dmamap_load(via->sgd_dmat, via->sgd_dmamap, via->sgd_table,
 593             NSEGS * sizeof(struct via_dma_op), dma_cb, via, 0) != 0)
 594                 goto bad;
 595
 596         ksnprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld %s",
 597                  rman_get_start(via->reg), rman_get_start(via->irq),
 598                  PCM_KLDSTRING(snd_via82c686));
 599
 600         /* Register */
 601         if (pcm_register(dev, via, 1, 1)) goto bad;
 602         pcm_addchan(dev, PCMDIR_PLAY, &viachan_class, via);
 603         pcm_addchan(dev, PCMDIR_REC, &viachan_class, via);
 604         pcm_setstatus(dev, status);
 605         return 0;
 606 bad:
 607         if (via->codec) ac97_destroy(via->codec);
 608         if (via->reg) bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg);
 609         if (via->ih) bus_teardown_intr(dev, via->irq, via->ih);
 610         if (via->irq) bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq);
 611         if (via->parent_dmat) bus_dma_tag_destroy(via->parent_dmat);
 612         if (via->sgd_dmamap) bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap);
 613         if (via->sgd_table) bus_dmamem_free(via->sgd_dmat, via->sgd_table, via->sgd_dmamap);
 614         if (via->sgd_dmat) bus_dma_tag_destroy(via->sgd_dmat);
 615         if (via->lock) snd_mtxfree(via->lock);
 616         if (via) kfree(via, M_DEVBUF);
 617         return ENXIO;
 618 }
 619
 620 static int
 621 via_detach(device_t dev)
 622 {
 623         int r;
 624         struct via_info *via = 0;
 625
 626         r = pcm_unregister(dev);
 627         if (r)
 628                 return r;
 629
 630         via = pcm_getdevinfo(dev);
 631         bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg);
 632         bus_teardown_intr(dev, via->irq, via->ih);
 633         bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq);
 634         bus_dma_tag_destroy(via->parent_dmat);
 635         bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap);
 636         bus_dmamem_free(via->sgd_dmat, via->sgd_table, via->sgd_dmamap);
 637         bus_dma_tag_destroy(via->sgd_dmat);
 638         snd_mtxfree(via->lock);
 639         kfree(via, M_DEVBUF);
 640         return 0;
 641 }
 642
 643
 644 static device_method_t via_methods[] = {
 645         DEVMETHOD(device_probe,         via_probe),
 646         DEVMETHOD(device_attach,        via_attach),
 647         DEVMETHOD(device_detach,        via_detach),
 648         { 0, 0}
 649 };
 650
 651 static driver_t via_driver = {
 652         "pcm",
 653         via_methods,
 654         PCM_SOFTC_SIZE,
 655 };
 656
 657 DRIVER_MODULE(snd_via82c686, pci, via_driver, pcm_devclass, 0, 0);
 658 MODULE_DEPEND(snd_via82c686, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
 659 MODULE_VERSION(snd_via82c686, 1);