via82c686.c revision 74763
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: head/sys/dev/sound/pci/via82c686.c 74763 2001-03-24 23:10:29Z cg $ 27 */ 28 29#include <dev/sound/pcm/sound.h> 30#include <dev/sound/pcm/ac97.h> 31 32#include <pci/pcireg.h> 33#include <pci/pcivar.h> 34#include <sys/sysctl.h> 35 36#include <dev/sound/pci/via82c686.h> 37 38#define VIA_PCI_ID 0x30581106 39#define NSEGS 4 /* Number of segments in SGD table */ 40 41#define SEGS_PER_CHAN (NSEGS/2) 42 43#define TIMEOUT 50 44#define VIA_BUFFSIZE 0x1000 45 46#undef DEB 47#define DEB(x) 48 49/* we rely on this struct being packed to 64 bits */ 50struct via_dma_op { 51 u_int32_t ptr; 52 u_int32_t flags; 53#define VIA_DMAOP_EOL 0x80000000 54#define VIA_DMAOP_FLAG 0x40000000 55#define VIA_DMAOP_STOP 0x20000000 56#define VIA_DMAOP_COUNT(x) ((x)&0x00FFFFFF) 57}; 58 59struct via_info; 60 61struct via_chinfo { 62 struct via_info *parent; 63 struct pcm_channel *channel; 64 struct snd_dbuf *buffer; 65 struct via_dma_op *sgd_table; 66 int dir, blksz; 67 int base, count, mode, ctrl; 68}; 69 70struct via_info { 71 bus_space_tag_t st; 72 bus_space_handle_t sh; 73 bus_dma_tag_t parent_dmat; 74 bus_dma_tag_t sgd_dmat; 75 bus_dmamap_t sgd_dmamap; 76 77 struct resource *reg, *irq; 78 int regid, irqid; 79 void *ih; 80 struct ac97_info *codec; 81 82 struct via_chinfo pch, rch; 83 struct via_dma_op *sgd_table; 84 u_int16_t codec_caps; 85}; 86 87static u_int32_t via_fmt[] = { 88 AFMT_U8, 89 AFMT_STEREO | AFMT_U8, 90 AFMT_S16_LE, 91 AFMT_STEREO | AFMT_S16_LE, 92 0 93}; 94static struct pcmchan_caps via_vracaps = {4000, 48000, via_fmt, 0}; 95static struct pcmchan_caps via_caps = {48000, 48000, via_fmt, 0}; 96 97static u_int32_t 98via_rd(struct via_info *via, int regno, int size) 99{ 100 101 switch (size) { 102 case 1: 103 return bus_space_read_1(via->st, via->sh, regno); 104 case 2: 105 return bus_space_read_2(via->st, via->sh, regno); 106 case 4: 107 return bus_space_read_4(via->st, via->sh, regno); 108 default: 109 return 0xFFFFFFFF; 110 } 111} 112 113 114static void 115via_wr(struct via_info *via, int regno, u_int32_t data, int size) 116{ 117 118 switch (size) { 119 case 1: 120 bus_space_write_1(via->st, via->sh, regno, data); 121 break; 122 case 2: 123 bus_space_write_2(via->st, via->sh, regno, data); 124 break; 125 case 4: 126 bus_space_write_4(via->st, via->sh, regno, data); 127 break; 128 } 129} 130 131/* -------------------------------------------------------------------- */ 132/* Codec interface */ 133 134static int 135via_waitready_codec(struct via_info *via) 136{ 137 int i; 138 139 /* poll until codec not busy */ 140 for (i = 0; (i < TIMEOUT) && 141 (via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_BUSY); i++) 142 DELAY(1); 143 if (i >= TIMEOUT) { 144 printf("via: codec busy\n"); 145 return 1; 146 } 147 148 return 0; 149} 150 151 152static int 153via_waitvalid_codec(struct via_info *via) 154{ 155 int i; 156 157 /* poll until codec valid */ 158 for (i = 0; (i < TIMEOUT) && 159 !(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_PRIVALID); i++) 160 DELAY(1); 161 if (i >= TIMEOUT) { 162 printf("via: codec invalid\n"); 163 return 1; 164 } 165 166 return 0; 167} 168 169 170static int 171via_write_codec(kobj_t obj, void *addr, int reg, u_int32_t val) 172{ 173 struct via_info *via = addr; 174 175 if (via_waitready_codec(via)) return -1; 176 177 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_INDEX(reg) | val, 4); 178 179 return 0; 180} 181 182 183static int 184via_read_codec(kobj_t obj, void *addr, int reg) 185{ 186 struct via_info *via = addr; 187 188 if (via_waitready_codec(via)) 189 return -1; 190 191 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_READ | VIA_CODEC_INDEX(reg),4); 192 193 if (via_waitready_codec(via)) 194 return -1; 195 196 if (via_waitvalid_codec(via)) 197 return -1; 198 199 return via_rd(via, VIA_CODEC_CTL, 2); 200} 201 202static kobj_method_t via_ac97_methods[] = { 203 KOBJMETHOD(ac97_read, via_read_codec), 204 KOBJMETHOD(ac97_write, via_write_codec), 205 { 0, 0 } 206}; 207AC97_DECLARE(via_ac97); 208 209/* -------------------------------------------------------------------- */ 210 211static int 212via_buildsgdt(struct via_chinfo *ch) 213{ 214 u_int32_t phys_addr, flag; 215 int i, segs, seg_size; 216 217 /* 218 * Build the scatter/gather DMA (SGD) table. 219 * There are four slots in the table: two for play, two for record. 220 * This creates two half-buffers, one of which is playing; the other 221 * is feeding. 222 */ 223 seg_size = ch->blksz; 224 segs = sndbuf_getsize(ch->buffer) / seg_size; 225 phys_addr = vtophys(sndbuf_getbuf(ch->buffer)); 226 227 for (i = 0; i < segs; i++) { 228 flag = (i == segs - 1)? VIA_DMAOP_EOL : VIA_DMAOP_FLAG; 229 ch->sgd_table[i].ptr = phys_addr + (i * seg_size); 230 ch->sgd_table[i].flags = flag | seg_size; 231 } 232 233 return 0; 234} 235 236/* channel interface */ 237static void * 238viachan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir) 239{ 240 struct via_info *via = devinfo; 241 struct via_chinfo *ch = (dir == PCMDIR_PLAY)? &via->pch : &via->rch; 242 243 ch->parent = via; 244 ch->channel = c; 245 ch->buffer = b; 246 ch->dir = dir; 247 ch->sgd_table = &via->sgd_table[(dir == PCMDIR_PLAY)? 0 : SEGS_PER_CHAN]; 248 if (ch->dir == PCMDIR_PLAY) { 249 ch->base = VIA_PLAY_DMAOPS_BASE; 250 ch->count = VIA_PLAY_DMAOPS_COUNT; 251 ch->ctrl = VIA_RECORD_CONTROL; 252 ch->mode = VIA_PLAY_MODE; 253 } else { 254 ch->base = VIA_RECORD_DMAOPS_BASE; 255 ch->count = VIA_RECORD_DMAOPS_COUNT; 256 ch->ctrl = VIA_PLAY_CONTROL; 257 ch->mode = VIA_RECORD_MODE; 258 } 259 260 if (sndbuf_alloc(ch->buffer, via->parent_dmat, VIA_BUFFSIZE) == -1) 261 return NULL; 262 return ch; 263} 264 265static int 266viachan_setformat(kobj_t obj, void *data, u_int32_t format) 267{ 268 struct via_chinfo *ch = data; 269 struct via_info *via = ch->parent; 270 int mode, mode_set; 271 272 mode_set = 0; 273 if (format & AFMT_STEREO) 274 mode_set |= VIA_RPMODE_STEREO; 275 if (format & AFMT_S16_LE) 276 mode_set |= VIA_RPMODE_16BIT; 277 278 DEB(printf("set format: dir = %d, format=%x\n", ch->dir, format)); 279 mode = via_rd(via, ch->mode, 1); 280 mode &= ~(VIA_RPMODE_16BIT | VIA_RPMODE_STEREO); 281 mode |= mode_set; 282 via_wr(via, ch->mode, mode, 1); 283 284 return 0; 285} 286 287static int 288viachan_setspeed(kobj_t obj, void *data, u_int32_t speed) 289{ 290 struct via_chinfo *ch = data; 291 struct via_info *via = ch->parent; 292 int reg; 293 294 /* 295 * Basic AC'97 defines a 48 kHz sample rate only. For other rates, 296 * upsampling is required. 297 * 298 * The VT82C686A does not perform upsampling, and neither do we. 299 * If the codec supports variable-rate audio (i.e. does the upsampling 300 * itself), then negotiate the rate with the codec. Otherwise, 301 * return 48 kHz cuz that's all you got. 302 */ 303 if (via->codec_caps & AC97_EXTCAP_VRA) { 304 reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE; 305 return ac97_setrate(via->codec, reg, speed); 306 } else 307 return 48000; 308} 309 310static int 311viachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize) 312{ 313 struct via_chinfo *ch = data; 314 315 ch->blksz = blocksize; 316 sndbuf_resize(ch->buffer, SEGS_PER_CHAN, ch->blksz); 317 318 return ch->blksz; 319} 320 321static int 322viachan_trigger(kobj_t obj, void *data, int go) 323{ 324 struct via_chinfo *ch = data; 325 struct via_info *via = ch->parent; 326 struct via_dma_op *ado; 327 328 if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD) 329 return 0; 330 331 ado = ch->sgd_table; 332 DEB(printf("ado located at va=%p pa=%x\n", ado, vtophys(ado))); 333 334 if (go == PCMTRIG_START) { 335 via_buildsgdt(ch); 336 via_wr(via, ch->base, vtophys(ado), 4); 337 via_wr(via, ch->ctrl, VIA_RPCTRL_START, 1); 338 } else 339 via_wr(via, ch->ctrl, VIA_RPCTRL_TERMINATE, 1); 340 341 DEB(printf("viachan_trigger: go=%d\n", go)); 342 return 0; 343} 344 345static int 346viachan_getptr(kobj_t obj, void *data) 347{ 348 struct via_chinfo *ch = data; 349 struct via_info *via = ch->parent; 350 struct via_dma_op *ado; 351 int ptr, base, base1, len, seg; 352 353 ado = ch->sgd_table; 354 base1 = via_rd(via, ch->base, 4); 355 len = via_rd(via, ch->count, 4); 356 base = via_rd(via, ch->base, 4); 357 if (base != base1) /* Avoid race hazard */ 358 len = via_rd(via, ch->count, 4); 359 360 DEB(printf("viachan_getptr: len / base = %x / %x\n", len, base)); 361 362 /* Base points to SGD segment to do, one past current */ 363 364 /* Determine how many segments have been done */ 365 seg = (base - vtophys(ado)) / sizeof(struct via_dma_op); 366 if (seg == 0) 367 seg = SEGS_PER_CHAN; 368 369 /* Now work out offset: seg less count */ 370 ptr = (seg * sndbuf_getsize(ch->buffer) / SEGS_PER_CHAN) - len; 371 if (ch->dir == PCMDIR_REC) { 372 /* DMA appears to operate on memory 'lines' of 32 bytes */ 373 /* so don't return any part line - it isn't in RAM yet */ 374 ptr = ptr & ~0x1f; 375 } 376 377 DEB(printf("return ptr=%d\n", ptr)); 378 return ptr; 379} 380 381static struct pcmchan_caps * 382viachan_getcaps(kobj_t obj, void *data) 383{ 384 struct via_chinfo *ch = data; 385 struct via_info *via = ch->parent; 386 387 return (via->codec_caps & AC97_EXTCAP_VRA)? &via_vracaps : &via_caps; 388} 389 390static kobj_method_t viachan_methods[] = { 391 KOBJMETHOD(channel_init, viachan_init), 392 KOBJMETHOD(channel_setformat, viachan_setformat), 393 KOBJMETHOD(channel_setspeed, viachan_setspeed), 394 KOBJMETHOD(channel_setblocksize, viachan_setblocksize), 395 KOBJMETHOD(channel_trigger, viachan_trigger), 396 KOBJMETHOD(channel_getptr, viachan_getptr), 397 KOBJMETHOD(channel_getcaps, viachan_getcaps), 398 { 0, 0 } 399}; 400CHANNEL_DECLARE(viachan); 401 402/* -------------------------------------------------------------------- */ 403 404static void 405via_intr(void *p) 406{ 407 struct via_info *via = p; 408 int st; 409 410 /* DEB(printf("viachan_intr\n")); */ 411 /* Read channel */ 412 st = via_rd(via, VIA_PLAY_STAT, 1); 413 if (st & VIA_RPSTAT_INTR) { 414 via_wr(via, VIA_PLAY_STAT, VIA_RPSTAT_INTR, 1); 415 chn_intr(via->pch.channel); 416 } 417 418 /* Write channel */ 419 st = via_rd(via, VIA_RECORD_STAT, 1); 420 if (st & VIA_RPSTAT_INTR) { 421 via_wr(via, VIA_RECORD_STAT, VIA_RPSTAT_INTR, 1); 422 chn_intr(via->rch.channel); 423 } 424} 425 426/* 427 * Probe and attach the card 428 */ 429static int 430via_probe(device_t dev) 431{ 432 if (pci_get_devid(dev) == VIA_PCI_ID) { 433 device_set_desc(dev, "VIA VT82C686A"); 434 return 0; 435 } 436 return ENXIO; 437} 438 439 440static void 441dma_cb(void *p, bus_dma_segment_t *bds, int a, int b) 442{ 443} 444 445 446static int 447via_attach(device_t dev) 448{ 449 struct via_info *via = 0; 450 char status[SND_STATUSLEN]; 451 u_int32_t data; 452 453 if ((via = malloc(sizeof *via, M_DEVBUF, M_NOWAIT)) == NULL) { 454 device_printf(dev, "cannot allocate softc\n"); 455 return ENXIO; 456 } 457 bzero(via, sizeof *via); 458 459 /* Get resources */ 460 data = pci_read_config(dev, PCIR_COMMAND, 2); 461 data |= (PCIM_CMD_PORTEN | PCIM_CMD_BUSMASTEREN); 462 pci_write_config(dev, PCIR_COMMAND, data, 2); 463 data = pci_read_config(dev, PCIR_COMMAND, 2); 464 465 pci_write_config(dev, VIA_PCICONF_MISC, 466 VIA_PCICONF_ACLINKENAB | VIA_PCICONF_ACSGD | VIA_PCICONF_ACNOTRST | VIA_PCICONF_ACVSR, 1); 467 468 via->regid = PCIR_MAPS; 469 via->reg = bus_alloc_resource(dev, SYS_RES_IOPORT, &via->regid, 0, ~0, 1, RF_ACTIVE); 470 if (!via->reg) { 471 device_printf(dev, "cannot allocate bus resource."); 472 goto bad; 473 } 474 via->st = rman_get_bustag(via->reg); 475 via->sh = rman_get_bushandle(via->reg); 476 477 via->irqid = 0; 478 via->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &via->irqid, 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 479 if (!via->irq || snd_setup_intr(dev, via->irq, 0, via_intr, via, &via->ih)) { 480 device_printf(dev, "unable to map interrupt\n"); 481 goto bad; 482 } 483 484 via_wr(via, VIA_PLAY_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1); 485 via_wr(via, VIA_RECORD_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1); 486 487 via->codec = AC97_CREATE(dev, via, via_ac97); 488 if (!via->codec) 489 goto bad; 490 491 mixer_init(dev, ac97_getmixerclass(), via->codec); 492 493 via->codec_caps = ac97_getextcaps(via->codec); 494 if (via->codec_caps & AC97_EXTCAP_VRA) 495 ac97_setextmode(via->codec, AC97_EXTCAP_VRA | AC97_EXTCAP_VRM); 496 497 /* DMA tag for buffers */ 498 if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0, 499 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 500 /*highaddr*/BUS_SPACE_MAXADDR, 501 /*filter*/NULL, /*filterarg*/NULL, 502 /*maxsize*/VIA_BUFFSIZE, /*nsegments*/1, /*maxsegz*/0x3ffff, 503 /*flags*/0, &via->parent_dmat) != 0) { 504 device_printf(dev, "unable to create dma tag\n"); 505 goto bad; 506 } 507 508 /* 509 * DMA tag for SGD table. The 686 uses scatter/gather DMA and 510 * requires a list in memory of work to do. We need only 16 bytes 511 * for this list, and it is wasteful to allocate 16K. 512 */ 513 if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0, 514 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 515 /*highaddr*/BUS_SPACE_MAXADDR, 516 /*filter*/NULL, /*filterarg*/NULL, 517 /*maxsize*/NSEGS * sizeof(struct via_dma_op), 518 /*nsegments*/1, /*maxsegz*/0x3ffff, 519 /*flags*/0, &via->sgd_dmat) != 0) { 520 device_printf(dev, "unable to create dma tag\n"); 521 goto bad; 522 } 523 524 if (bus_dmamem_alloc(via->sgd_dmat, (void **)&via->sgd_table, BUS_DMA_NOWAIT, &via->sgd_dmamap) == -1) 525 goto bad; 526 if (bus_dmamap_load(via->sgd_dmat, via->sgd_dmamap, via->sgd_table, NSEGS * sizeof(struct via_dma_op), dma_cb, 0, 0)) 527 goto bad; 528 529 snprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld", rman_get_start(via->reg), rman_get_start(via->irq)); 530 531 /* Register */ 532 if (pcm_register(dev, via, 1, 1)) goto bad; 533 pcm_addchan(dev, PCMDIR_PLAY, &viachan_class, via); 534 pcm_addchan(dev, PCMDIR_REC, &viachan_class, via); 535 pcm_setstatus(dev, status); 536 return 0; 537bad: 538 if (via->codec) ac97_destroy(via->codec); 539 if (via->reg) bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg); 540 if (via->ih) bus_teardown_intr(dev, via->irq, via->ih); 541 if (via->irq) bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq); 542 if (via->parent_dmat) bus_dma_tag_destroy(via->parent_dmat); 543 if (via->sgd_dmamap) bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap); 544 if (via->sgd_dmat) bus_dma_tag_destroy(via->sgd_dmat); 545 if (via) free(via, M_DEVBUF); 546 return ENXIO; 547} 548 549static int 550via_detach(device_t dev) 551{ 552 int r; 553 struct via_info *via = 0; 554 555 r = pcm_unregister(dev); 556 if (r) 557 return r; 558 559 via = pcm_getdevinfo(dev); 560 bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg); 561 bus_teardown_intr(dev, via->irq, via->ih); 562 bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq); 563 bus_dma_tag_destroy(via->parent_dmat); 564 bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap); 565 bus_dma_tag_destroy(via->sgd_dmat); 566 free(via, M_DEVBUF); 567 return 0; 568} 569 570 571static device_method_t via_methods[] = { 572 DEVMETHOD(device_probe, via_probe), 573 DEVMETHOD(device_attach, via_attach), 574 DEVMETHOD(device_detach, via_detach), 575 { 0, 0} 576}; 577 578static driver_t via_driver = { 579 "pcm", 580 via_methods, 581 sizeof(struct snddev_info), 582}; 583 584static devclass_t pcm_devclass; 585 586DRIVER_MODULE(via, pci, via_driver, pcm_devclass, 0, 0); 587MODULE_DEPEND(via, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER); 588MODULE_VERSION(via, 1); 589 590 591