2 * Copyright (c) 2000 David Jones <dej@ox.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <dev/sound/pcm/sound.h>
28 #include <dev/sound/pcm/ac97.h>
30 #include <pci/pcireg.h>
31 #include <pci/pcivar.h>
32 #include <sys/sysctl.h>
34 #include <dev/sound/pci/via82c686.h>
36 SND_DECLARE_FILE("$FreeBSD: src/sys/dev/sound/pci/via82c686.c,v 1.4.2.10 2003/05/11 01:45:53 orion Exp $");
38 #define VIA_PCI_ID 0x30581106
39 #define NSEGS 4 /* Number of segments in SGD table */
41 #define SEGS_PER_CHAN (NSEGS/2)
44 #define VIA_DEFAULT_BUFSZ 0x1000
49 /* we rely on this struct being packed to 64 bits */
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)
62 struct via_info *parent;
63 struct pcm_channel *channel;
64 struct snd_dbuf *buffer;
65 struct via_dma_op *sgd_table;
67 int base, count, mode, ctrl;
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;
77 struct resource *reg, *irq;
80 struct ac97_info *codec;
84 struct via_chinfo pch, rch;
85 struct via_dma_op *sgd_table;
89 static u_int32_t via_fmt[] = {
91 AFMT_STEREO | AFMT_U8,
93 AFMT_STEREO | AFMT_S16_LE,
96 static struct pcmchan_caps via_vracaps = {4000, 48000, via_fmt, 0};
97 static struct pcmchan_caps via_caps = {48000, 48000, via_fmt, 0};
100 via_rd(struct via_info *via, int regno, int size)
105 return bus_space_read_1(via->st, via->sh, regno);
107 return bus_space_read_2(via->st, via->sh, regno);
109 return bus_space_read_4(via->st, via->sh, regno);
117 via_wr(struct via_info *via, int regno, u_int32_t data, int size)
122 bus_space_write_1(via->st, via->sh, regno, data);
125 bus_space_write_2(via->st, via->sh, regno, data);
128 bus_space_write_4(via->st, via->sh, regno, data);
133 /* -------------------------------------------------------------------- */
134 /* Codec interface */
137 via_waitready_codec(struct via_info *via)
141 /* poll until codec not busy */
142 for (i = 0; (i < TIMEOUT) &&
143 (via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_BUSY); i++)
146 printf("via: codec busy\n");
155 via_waitvalid_codec(struct via_info *via)
159 /* poll until codec valid */
160 for (i = 0; (i < TIMEOUT) &&
161 !(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_PRIVALID); i++)
164 printf("via: codec invalid\n");
173 via_write_codec(kobj_t obj, void *addr, int reg, u_int32_t val)
175 struct via_info *via = addr;
177 if (via_waitready_codec(via)) return -1;
179 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_INDEX(reg) | val, 4);
186 via_read_codec(kobj_t obj, void *addr, int reg)
188 struct via_info *via = addr;
190 if (via_waitready_codec(via))
193 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_READ | VIA_CODEC_INDEX(reg),4);
195 if (via_waitready_codec(via))
198 if (via_waitvalid_codec(via))
201 return via_rd(via, VIA_CODEC_CTL, 2);
204 static kobj_method_t via_ac97_methods[] = {
205 KOBJMETHOD(ac97_read, via_read_codec),
206 KOBJMETHOD(ac97_write, via_write_codec),
209 AC97_DECLARE(via_ac97);
211 /* -------------------------------------------------------------------- */
214 via_buildsgdt(struct via_chinfo *ch)
216 u_int32_t phys_addr, flag;
217 int i, segs, seg_size;
220 * Build the scatter/gather DMA (SGD) table.
221 * There are four slots in the table: two for play, two for record.
222 * This creates two half-buffers, one of which is playing; the other
225 seg_size = ch->blksz;
226 segs = sndbuf_getsize(ch->buffer) / seg_size;
227 phys_addr = vtophys(sndbuf_getbuf(ch->buffer));
229 for (i = 0; i < segs; i++) {
230 flag = (i == segs - 1)? VIA_DMAOP_EOL : VIA_DMAOP_FLAG;
231 ch->sgd_table[i].ptr = phys_addr + (i * seg_size);
232 ch->sgd_table[i].flags = flag | seg_size;
238 /* channel interface */
240 viachan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
242 struct via_info *via = devinfo;
243 struct via_chinfo *ch = (dir == PCMDIR_PLAY)? &via->pch : &via->rch;
249 ch->sgd_table = &via->sgd_table[(dir == PCMDIR_PLAY)? 0 : SEGS_PER_CHAN];
250 if (ch->dir == PCMDIR_PLAY) {
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;
256 ch->base = VIA_RECORD_DMAOPS_BASE;
257 ch->count = VIA_RECORD_DMAOPS_COUNT;
258 ch->ctrl = VIA_RECORD_CONTROL;
259 ch->mode = VIA_RECORD_MODE;
262 if (sndbuf_alloc(ch->buffer, via->parent_dmat, via->bufsz) == -1)
268 viachan_setformat(kobj_t obj, void *data, u_int32_t format)
270 struct via_chinfo *ch = data;
271 struct via_info *via = ch->parent;
275 if (format & AFMT_STEREO)
276 mode_set |= VIA_RPMODE_STEREO;
277 if (format & AFMT_S16_LE)
278 mode_set |= VIA_RPMODE_16BIT;
280 DEB(printf("set format: dir = %d, format=%x\n", ch->dir, format));
281 mode = via_rd(via, ch->mode, 1);
282 mode &= ~(VIA_RPMODE_16BIT | VIA_RPMODE_STEREO);
284 via_wr(via, ch->mode, mode, 1);
290 viachan_setspeed(kobj_t obj, void *data, u_int32_t speed)
292 struct via_chinfo *ch = data;
293 struct via_info *via = ch->parent;
297 * Basic AC'97 defines a 48 kHz sample rate only. For other rates,
298 * upsampling is required.
300 * The VT82C686A does not perform upsampling, and neither do we.
301 * If the codec supports variable-rate audio (i.e. does the upsampling
302 * itself), then negotiate the rate with the codec. Otherwise,
303 * return 48 kHz cuz that's all you got.
305 if (via->codec_caps & AC97_EXTCAP_VRA) {
306 reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE;
307 return ac97_setrate(via->codec, reg, speed);
313 viachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
315 struct via_chinfo *ch = data;
317 ch->blksz = blocksize;
318 sndbuf_resize(ch->buffer, SEGS_PER_CHAN, ch->blksz);
324 viachan_trigger(kobj_t obj, void *data, int go)
326 struct via_chinfo *ch = data;
327 struct via_info *via = ch->parent;
328 struct via_dma_op *ado;
330 if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
334 DEB(printf("ado located at va=%p pa=%x\n", ado, vtophys(ado)));
336 if (go == PCMTRIG_START) {
338 via_wr(via, ch->base, vtophys(ado), 4);
339 via_wr(via, ch->ctrl, VIA_RPCTRL_START, 1);
341 via_wr(via, ch->ctrl, VIA_RPCTRL_TERMINATE, 1);
343 DEB(printf("viachan_trigger: go=%d\n", go));
348 viachan_getptr(kobj_t obj, void *data)
350 struct via_chinfo *ch = data;
351 struct via_info *via = ch->parent;
352 struct via_dma_op *ado;
353 int ptr, base, base1, len, seg;
356 base1 = via_rd(via, ch->base, 4);
357 len = via_rd(via, ch->count, 4);
358 base = via_rd(via, ch->base, 4);
359 if (base != base1) /* Avoid race hazard */
360 len = via_rd(via, ch->count, 4);
362 DEB(printf("viachan_getptr: len / base = %x / %x\n", len, base));
364 /* Base points to SGD segment to do, one past current */
366 /* Determine how many segments have been done */
367 seg = (base - vtophys(ado)) / sizeof(struct via_dma_op);
371 /* Now work out offset: seg less count */
372 ptr = (seg * sndbuf_getsize(ch->buffer) / SEGS_PER_CHAN) - len;
373 if (ch->dir == PCMDIR_REC) {
374 /* DMA appears to operate on memory 'lines' of 32 bytes */
375 /* so don't return any part line - it isn't in RAM yet */
379 DEB(printf("return ptr=%d\n", ptr));
383 static struct pcmchan_caps *
384 viachan_getcaps(kobj_t obj, void *data)
386 struct via_chinfo *ch = data;
387 struct via_info *via = ch->parent;
389 return (via->codec_caps & AC97_EXTCAP_VRA)? &via_vracaps : &via_caps;
392 static kobj_method_t viachan_methods[] = {
393 KOBJMETHOD(channel_init, viachan_init),
394 KOBJMETHOD(channel_setformat, viachan_setformat),
395 KOBJMETHOD(channel_setspeed, viachan_setspeed),
396 KOBJMETHOD(channel_setblocksize, viachan_setblocksize),
397 KOBJMETHOD(channel_trigger, viachan_trigger),
398 KOBJMETHOD(channel_getptr, viachan_getptr),
399 KOBJMETHOD(channel_getcaps, viachan_getcaps),
402 CHANNEL_DECLARE(viachan);
404 /* -------------------------------------------------------------------- */
409 struct via_info *via = p;
412 /* DEB(printf("viachan_intr\n")); */
414 st = via_rd(via, VIA_PLAY_STAT, 1);
415 if (st & VIA_RPSTAT_INTR) {
416 via_wr(via, VIA_PLAY_STAT, VIA_RPSTAT_INTR, 1);
417 chn_intr(via->pch.channel);
421 st = via_rd(via, VIA_RECORD_STAT, 1);
422 if (st & VIA_RPSTAT_INTR) {
423 via_wr(via, VIA_RECORD_STAT, VIA_RPSTAT_INTR, 1);
424 chn_intr(via->rch.channel);
429 * Probe and attach the card
432 via_probe(device_t dev)
434 if (pci_get_devid(dev) == VIA_PCI_ID) {
435 device_set_desc(dev, "VIA VT82C686A");
443 dma_cb(void *p, bus_dma_segment_t *bds, int a, int b)
449 via_attach(device_t dev)
451 struct via_info *via = 0;
452 char status[SND_STATUSLEN];
455 if ((via = malloc(sizeof *via, M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) {
456 device_printf(dev, "cannot allocate softc\n");
461 data = pci_read_config(dev, PCIR_COMMAND, 2);
462 data |= (PCIM_CMD_PORTEN | PCIM_CMD_BUSMASTEREN);
463 pci_write_config(dev, PCIR_COMMAND, data, 2);
464 data = pci_read_config(dev, PCIR_COMMAND, 2);
466 /* Wake up and reset AC97 if necessary */
467 data = pci_read_config(dev, VIA_AC97STATUS, 1);
469 if ((data & VIA_AC97STATUS_RDY) == 0) {
470 /* Cold reset per ac97r2.3 spec (page 95) */
471 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */
472 DELAY(100); /* Wait T_rst_low */
473 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_NRST, 1); /* Assert high */
474 DELAY(5); /* Wait T_rst2clk */
475 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */
478 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */
480 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_SYNC, 1); /* Sync */
481 DELAY(5); /* Wait T_sync_high */
482 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */
483 DELAY(5); /* Wait T_sync2clk */
486 /* Power everything up */
487 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_DESIRED, 1);
489 /* Wait for codec to become ready (largest reported delay here 310ms) */
490 for (cnt = 0; cnt < 2000; cnt++) {
491 data = pci_read_config(dev, VIA_AC97STATUS, 1);
492 if (data & VIA_AC97STATUS_RDY)
497 via->regid = PCIR_MAPS;
498 via->reg = bus_alloc_resource(dev, SYS_RES_IOPORT, &via->regid, 0, ~0, 1, RF_ACTIVE);
500 device_printf(dev, "cannot allocate bus resource.");
503 via->st = rman_get_bustag(via->reg);
504 via->sh = rman_get_bushandle(via->reg);
506 via->bufsz = pcm_getbuffersize(dev, 4096, VIA_DEFAULT_BUFSZ, 65536);
509 via->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &via->irqid, 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
510 if (!via->irq || snd_setup_intr(dev, via->irq, 0, via_intr, via, &via->ih)) {
511 device_printf(dev, "unable to map interrupt\n");
515 via_wr(via, VIA_PLAY_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
516 via_wr(via, VIA_RECORD_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
518 via->codec = AC97_CREATE(dev, via, via_ac97);
522 if (mixer_init(dev, ac97_getmixerclass(), via->codec))
525 via->codec_caps = ac97_getextcaps(via->codec);
526 ac97_setextmode(via->codec,
527 via->codec_caps & (AC97_EXTCAP_VRA | AC97_EXTCAP_VRM));
529 /* DMA tag for buffers */
530 if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0,
531 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
532 /*highaddr*/BUS_SPACE_MAXADDR,
533 /*filter*/NULL, /*filterarg*/NULL,
534 /*maxsize*/via->bufsz, /*nsegments*/1, /*maxsegz*/0x3ffff,
535 /*flags*/0, &via->parent_dmat) != 0) {
536 device_printf(dev, "unable to create dma tag\n");
541 * DMA tag for SGD table. The 686 uses scatter/gather DMA and
542 * requires a list in memory of work to do. We need only 16 bytes
543 * for this list, and it is wasteful to allocate 16K.
545 if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0,
546 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
547 /*highaddr*/BUS_SPACE_MAXADDR,
548 /*filter*/NULL, /*filterarg*/NULL,
549 /*maxsize*/NSEGS * sizeof(struct via_dma_op),
550 /*nsegments*/1, /*maxsegz*/0x3ffff,
551 /*flags*/0, &via->sgd_dmat) != 0) {
552 device_printf(dev, "unable to create dma tag\n");
556 if (bus_dmamem_alloc(via->sgd_dmat, (void **)&via->sgd_table, BUS_DMA_NOWAIT, &via->sgd_dmamap) == -1)
558 if (bus_dmamap_load(via->sgd_dmat, via->sgd_dmamap, via->sgd_table, NSEGS * sizeof(struct via_dma_op), dma_cb, 0, 0))
561 snprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld", rman_get_start(via->reg), rman_get_start(via->irq));
564 if (pcm_register(dev, via, 1, 1)) goto bad;
565 pcm_addchan(dev, PCMDIR_PLAY, &viachan_class, via);
566 pcm_addchan(dev, PCMDIR_REC, &viachan_class, via);
567 pcm_setstatus(dev, status);
570 if (via->codec) ac97_destroy(via->codec);
571 if (via->reg) bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg);
572 if (via->ih) bus_teardown_intr(dev, via->irq, via->ih);
573 if (via->irq) bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq);
574 if (via->parent_dmat) bus_dma_tag_destroy(via->parent_dmat);
575 if (via->sgd_dmamap) bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap);
576 if (via->sgd_dmat) bus_dma_tag_destroy(via->sgd_dmat);
577 if (via) free(via, M_DEVBUF);
582 via_detach(device_t dev)
585 struct via_info *via = 0;
587 r = pcm_unregister(dev);
591 via = pcm_getdevinfo(dev);
592 bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg);
593 bus_teardown_intr(dev, via->irq, via->ih);
594 bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq);
595 bus_dma_tag_destroy(via->parent_dmat);
596 bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap);
597 bus_dma_tag_destroy(via->sgd_dmat);
603 static device_method_t via_methods[] = {
604 DEVMETHOD(device_probe, via_probe),
605 DEVMETHOD(device_attach, via_attach),
606 DEVMETHOD(device_detach, via_detach),
610 static driver_t via_driver = {
616 DRIVER_MODULE(snd_via82c686, pci, via_driver, pcm_devclass, 0, 0);
617 MODULE_DEPEND(snd_via82c686, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
618 MODULE_VERSION(snd_via82c686, 1);