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
26 * $FreeBSD: src/sys/dev/sound/pci/via82c686.c,v 1.4.2.10 2003/05/11 01:45:53 orion Exp $
27 * $DragonFly: src/sys/dev/sound/pci/via82c686.c,v 1.5 2006/09/05 00:55:43 dillon Exp $
30 #include <dev/sound/pcm/sound.h>
31 #include <dev/sound/pcm/ac97.h>
33 #include <bus/pci/pcireg.h>
34 #include <bus/pci/pcivar.h>
35 #include <sys/sysctl.h>
37 #include <dev/sound/pci/via82c686.h>
39 SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pci/via82c686.c,v 1.5 2006/09/05 00:55:43 dillon Exp $");
41 #define VIA_PCI_ID 0x30581106
42 #define NSEGS 4 /* Number of segments in SGD table */
44 #define SEGS_PER_CHAN (NSEGS/2)
47 #define VIA_DEFAULT_BUFSZ 0x1000
52 /* we rely on this struct being packed to 64 bits */
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)
65 struct via_info *parent;
66 struct pcm_channel *channel;
67 struct snd_dbuf *buffer;
68 struct via_dma_op *sgd_table;
70 int base, count, mode, ctrl;
75 bus_space_handle_t sh;
76 bus_dma_tag_t parent_dmat;
77 bus_dma_tag_t sgd_dmat;
78 bus_dmamap_t sgd_dmamap;
80 struct resource *reg, *irq;
83 struct ac97_info *codec;
87 struct via_chinfo pch, rch;
88 struct via_dma_op *sgd_table;
92 static u_int32_t via_fmt[] = {
94 AFMT_STEREO | AFMT_U8,
96 AFMT_STEREO | AFMT_S16_LE,
99 static struct pcmchan_caps via_vracaps = {4000, 48000, via_fmt, 0};
100 static struct pcmchan_caps via_caps = {48000, 48000, via_fmt, 0};
103 via_rd(struct via_info *via, int regno, int size)
108 return bus_space_read_1(via->st, via->sh, regno);
110 return bus_space_read_2(via->st, via->sh, regno);
112 return bus_space_read_4(via->st, via->sh, regno);
120 via_wr(struct via_info *via, int regno, u_int32_t data, int size)
125 bus_space_write_1(via->st, via->sh, regno, data);
128 bus_space_write_2(via->st, via->sh, regno, data);
131 bus_space_write_4(via->st, via->sh, regno, data);
136 /* -------------------------------------------------------------------- */
137 /* Codec interface */
140 via_waitready_codec(struct via_info *via)
144 /* poll until codec not busy */
145 for (i = 0; (i < TIMEOUT) &&
146 (via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_BUSY); i++)
149 printf("via: codec busy\n");
158 via_waitvalid_codec(struct via_info *via)
162 /* poll until codec valid */
163 for (i = 0; (i < TIMEOUT) &&
164 !(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_PRIVALID); i++)
167 printf("via: codec invalid\n");
176 via_write_codec(kobj_t obj, void *addr, int reg, u_int32_t val)
178 struct via_info *via = addr;
180 if (via_waitready_codec(via)) return -1;
182 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_INDEX(reg) | val, 4);
189 via_read_codec(kobj_t obj, void *addr, int reg)
191 struct via_info *via = addr;
193 if (via_waitready_codec(via))
196 via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_READ | VIA_CODEC_INDEX(reg),4);
198 if (via_waitready_codec(via))
201 if (via_waitvalid_codec(via))
204 return via_rd(via, VIA_CODEC_CTL, 2);
207 static kobj_method_t via_ac97_methods[] = {
208 KOBJMETHOD(ac97_read, via_read_codec),
209 KOBJMETHOD(ac97_write, via_write_codec),
212 AC97_DECLARE(via_ac97);
214 /* -------------------------------------------------------------------- */
217 via_buildsgdt(struct via_chinfo *ch)
219 u_int32_t phys_addr, flag;
220 int i, segs, seg_size;
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
228 seg_size = ch->blksz;
229 segs = sndbuf_getsize(ch->buffer) / seg_size;
230 phys_addr = vtophys(sndbuf_getbuf(ch->buffer));
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;
241 /* channel interface */
243 viachan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
245 struct via_info *via = devinfo;
246 struct via_chinfo *ch = (dir == PCMDIR_PLAY)? &via->pch : &via->rch;
252 ch->sgd_table = &via->sgd_table[(dir == PCMDIR_PLAY)? 0 : SEGS_PER_CHAN];
253 if (ch->dir == PCMDIR_PLAY) {
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;
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;
265 if (sndbuf_alloc(ch->buffer, via->parent_dmat, via->bufsz) == -1)
271 viachan_setformat(kobj_t obj, void *data, u_int32_t format)
273 struct via_chinfo *ch = data;
274 struct via_info *via = ch->parent;
278 if (format & AFMT_STEREO)
279 mode_set |= VIA_RPMODE_STEREO;
280 if (format & AFMT_S16_LE)
281 mode_set |= VIA_RPMODE_16BIT;
283 DEB(printf("set format: dir = %d, format=%x\n", ch->dir, format));
284 mode = via_rd(via, ch->mode, 1);
285 mode &= ~(VIA_RPMODE_16BIT | VIA_RPMODE_STEREO);
287 via_wr(via, ch->mode, mode, 1);
293 viachan_setspeed(kobj_t obj, void *data, u_int32_t speed)
295 struct via_chinfo *ch = data;
296 struct via_info *via = ch->parent;
300 * Basic AC'97 defines a 48 kHz sample rate only. For other rates,
301 * upsampling is required.
303 * The VT82C686A does not perform upsampling, and neither do we.
304 * If the codec supports variable-rate audio (i.e. does the upsampling
305 * itself), then negotiate the rate with the codec. Otherwise,
306 * return 48 kHz cuz that's all you got.
308 if (via->codec_caps & AC97_EXTCAP_VRA) {
309 reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE;
310 return ac97_setrate(via->codec, reg, speed);
316 viachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
318 struct via_chinfo *ch = data;
320 ch->blksz = blocksize;
321 sndbuf_resize(ch->buffer, SEGS_PER_CHAN, ch->blksz);
327 viachan_trigger(kobj_t obj, void *data, int go)
329 struct via_chinfo *ch = data;
330 struct via_info *via = ch->parent;
331 struct via_dma_op *ado;
333 if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
337 DEB(printf("ado located at va=%p pa=%x\n", ado, vtophys(ado)));
339 if (go == PCMTRIG_START) {
341 via_wr(via, ch->base, vtophys(ado), 4);
342 via_wr(via, ch->ctrl, VIA_RPCTRL_START, 1);
344 via_wr(via, ch->ctrl, VIA_RPCTRL_TERMINATE, 1);
346 DEB(printf("viachan_trigger: go=%d\n", go));
351 viachan_getptr(kobj_t obj, void *data)
353 struct via_chinfo *ch = data;
354 struct via_info *via = ch->parent;
355 struct via_dma_op *ado;
356 int ptr, base, base1, len, seg;
359 base1 = via_rd(via, ch->base, 4);
360 len = via_rd(via, ch->count, 4);
361 base = via_rd(via, ch->base, 4);
362 if (base != base1) /* Avoid race hazard */
363 len = via_rd(via, ch->count, 4);
365 DEB(printf("viachan_getptr: len / base = %x / %x\n", len, base));
367 /* Base points to SGD segment to do, one past current */
369 /* Determine how many segments have been done */
370 seg = (base - vtophys(ado)) / sizeof(struct via_dma_op);
374 /* Now work out offset: seg less count */
375 ptr = (seg * sndbuf_getsize(ch->buffer) / SEGS_PER_CHAN) - len;
376 if (ch->dir == PCMDIR_REC) {
377 /* DMA appears to operate on memory 'lines' of 32 bytes */
378 /* so don't return any part line - it isn't in RAM yet */
382 DEB(printf("return ptr=%d\n", ptr));
386 static struct pcmchan_caps *
387 viachan_getcaps(kobj_t obj, void *data)
389 struct via_chinfo *ch = data;
390 struct via_info *via = ch->parent;
392 return (via->codec_caps & AC97_EXTCAP_VRA)? &via_vracaps : &via_caps;
395 static kobj_method_t viachan_methods[] = {
396 KOBJMETHOD(channel_init, viachan_init),
397 KOBJMETHOD(channel_setformat, viachan_setformat),
398 KOBJMETHOD(channel_setspeed, viachan_setspeed),
399 KOBJMETHOD(channel_setblocksize, viachan_setblocksize),
400 KOBJMETHOD(channel_trigger, viachan_trigger),
401 KOBJMETHOD(channel_getptr, viachan_getptr),
402 KOBJMETHOD(channel_getcaps, viachan_getcaps),
405 CHANNEL_DECLARE(viachan);
407 /* -------------------------------------------------------------------- */
412 struct via_info *via = p;
415 /* DEB(printf("viachan_intr\n")); */
417 st = via_rd(via, VIA_PLAY_STAT, 1);
418 if (st & VIA_RPSTAT_INTR) {
419 via_wr(via, VIA_PLAY_STAT, VIA_RPSTAT_INTR, 1);
420 chn_intr(via->pch.channel);
424 st = via_rd(via, VIA_RECORD_STAT, 1);
425 if (st & VIA_RPSTAT_INTR) {
426 via_wr(via, VIA_RECORD_STAT, VIA_RPSTAT_INTR, 1);
427 chn_intr(via->rch.channel);
432 * Probe and attach the card
435 via_probe(device_t dev)
437 if (pci_get_devid(dev) == VIA_PCI_ID) {
438 device_set_desc(dev, "VIA VT82C686A");
446 dma_cb(void *p, bus_dma_segment_t *bds, int a, int b)
452 via_attach(device_t dev)
454 struct via_info *via = 0;
455 char status[SND_STATUSLEN];
458 if ((via = kmalloc(sizeof *via, M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) {
459 device_printf(dev, "cannot allocate softc\n");
464 data = pci_read_config(dev, PCIR_COMMAND, 2);
465 data |= (PCIM_CMD_PORTEN | PCIM_CMD_BUSMASTEREN);
466 pci_write_config(dev, PCIR_COMMAND, data, 2);
467 data = pci_read_config(dev, PCIR_COMMAND, 2);
469 /* Wake up and reset AC97 if necessary */
470 data = pci_read_config(dev, VIA_AC97STATUS, 1);
472 if ((data & VIA_AC97STATUS_RDY) == 0) {
473 /* Cold reset per ac97r2.3 spec (page 95) */
474 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */
475 DELAY(100); /* Wait T_rst_low */
476 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_NRST, 1); /* Assert high */
477 DELAY(5); /* Wait T_rst2clk */
478 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */
481 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */
483 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_SYNC, 1); /* Sync */
484 DELAY(5); /* Wait T_sync_high */
485 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */
486 DELAY(5); /* Wait T_sync2clk */
489 /* Power everything up */
490 pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_DESIRED, 1);
492 /* Wait for codec to become ready (largest reported delay here 310ms) */
493 for (cnt = 0; cnt < 2000; cnt++) {
494 data = pci_read_config(dev, VIA_AC97STATUS, 1);
495 if (data & VIA_AC97STATUS_RDY)
500 via->regid = PCIR_MAPS;
501 via->reg = bus_alloc_resource(dev, SYS_RES_IOPORT, &via->regid, 0, ~0, 1, RF_ACTIVE);
503 device_printf(dev, "cannot allocate bus resource.");
506 via->st = rman_get_bustag(via->reg);
507 via->sh = rman_get_bushandle(via->reg);
509 via->bufsz = pcm_getbuffersize(dev, 4096, VIA_DEFAULT_BUFSZ, 65536);
512 via->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &via->irqid, 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
513 if (!via->irq || snd_setup_intr(dev, via->irq, 0, via_intr, via, &via->ih, NULL)) {
514 device_printf(dev, "unable to map interrupt\n");
518 via_wr(via, VIA_PLAY_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
519 via_wr(via, VIA_RECORD_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
521 via->codec = AC97_CREATE(dev, via, via_ac97);
525 if (mixer_init(dev, ac97_getmixerclass(), via->codec))
528 via->codec_caps = ac97_getextcaps(via->codec);
529 ac97_setextmode(via->codec,
530 via->codec_caps & (AC97_EXTCAP_VRA | AC97_EXTCAP_VRM));
532 /* DMA tag for buffers */
533 if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0,
534 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
535 /*highaddr*/BUS_SPACE_MAXADDR,
536 /*filter*/NULL, /*filterarg*/NULL,
537 /*maxsize*/via->bufsz, /*nsegments*/1, /*maxsegz*/0x3ffff,
538 /*flags*/0, &via->parent_dmat) != 0) {
539 device_printf(dev, "unable to create dma tag\n");
544 * DMA tag for SGD table. The 686 uses scatter/gather DMA and
545 * requires a list in memory of work to do. We need only 16 bytes
546 * for this list, and it is wasteful to allocate 16K.
548 if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0,
549 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
550 /*highaddr*/BUS_SPACE_MAXADDR,
551 /*filter*/NULL, /*filterarg*/NULL,
552 /*maxsize*/NSEGS * sizeof(struct via_dma_op),
553 /*nsegments*/1, /*maxsegz*/0x3ffff,
554 /*flags*/0, &via->sgd_dmat) != 0) {
555 device_printf(dev, "unable to create dma tag\n");
559 if (bus_dmamem_alloc(via->sgd_dmat, (void **)&via->sgd_table, BUS_DMA_NOWAIT, &via->sgd_dmamap) == -1)
561 if (bus_dmamap_load(via->sgd_dmat, via->sgd_dmamap, via->sgd_table, NSEGS * sizeof(struct via_dma_op), dma_cb, 0, 0))
564 snprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld", rman_get_start(via->reg), rman_get_start(via->irq));
567 if (pcm_register(dev, via, 1, 1)) goto bad;
568 pcm_addchan(dev, PCMDIR_PLAY, &viachan_class, via);
569 pcm_addchan(dev, PCMDIR_REC, &viachan_class, via);
570 pcm_setstatus(dev, status);
573 if (via->codec) ac97_destroy(via->codec);
574 if (via->reg) bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg);
575 if (via->ih) bus_teardown_intr(dev, via->irq, via->ih);
576 if (via->irq) bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq);
577 if (via->parent_dmat) bus_dma_tag_destroy(via->parent_dmat);
578 if (via->sgd_dmamap) bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap);
579 if (via->sgd_dmat) bus_dma_tag_destroy(via->sgd_dmat);
580 if (via) kfree(via, M_DEVBUF);
585 via_detach(device_t dev)
588 struct via_info *via = 0;
590 r = pcm_unregister(dev);
594 via = pcm_getdevinfo(dev);
595 bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg);
596 bus_teardown_intr(dev, via->irq, via->ih);
597 bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq);
598 bus_dma_tag_destroy(via->parent_dmat);
599 bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap);
600 bus_dma_tag_destroy(via->sgd_dmat);
601 kfree(via, M_DEVBUF);
606 static device_method_t via_methods[] = {
607 DEVMETHOD(device_probe, via_probe),
608 DEVMETHOD(device_attach, via_attach),
609 DEVMETHOD(device_detach, via_detach),
613 static driver_t via_driver = {
619 DRIVER_MODULE(snd_via82c686, pci, via_driver, pcm_devclass, 0, 0);
620 MODULE_DEPEND(snd_via82c686, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
621 MODULE_VERSION(snd_via82c686, 1);