2 * Copyright (c) 1999 Seigo Tanimura
5 * Portions of this source are based on cwcealdr.cpp and dhwiface.cpp in
6 * cwcealdr1.zip, the sample sources by Crystal Semiconductor.
7 * Copyright (c) 1996-1998 Crystal Semiconductor Corp.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * $FreeBSD: src/sys/dev/sound/pci/csapcm.c,v 1.8.2.7 2002/04/22 15:49:32 cg Exp $
31 * $DragonFly: src/sys/dev/sound/pci/csapcm.c,v 1.3 2003/08/07 21:17:13 dillon Exp $
34 #include <sys/soundcard.h>
35 #include <dev/sound/pcm/sound.h>
36 #include <dev/sound/pcm/ac97.h>
37 #include <dev/sound/chip.h>
38 #include <dev/sound/pci/csareg.h>
39 #include <dev/sound/pci/csavar.h>
41 #include <bus/pci/pcireg.h>
42 #include <bus/pci/pcivar.h>
44 SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pci/csapcm.c,v 1.3 2003/08/07 21:17:13 dillon Exp $");
46 /* Buffer size on dma transfer. Fixed for CS416x. */
47 #define CS461x_BUFFSIZE (4 * 1024)
49 #define GOF_PER_SEC 200
51 /* device private data */
55 struct csa_info *parent;
56 struct pcm_channel *channel;
57 struct snd_dbuf *buffer;
64 csa_res res; /* resource */
65 void *ih; /* Interrupt cookie */
66 bus_dma_tag_t parent_dmat; /* DMA tag */
67 struct csa_bridgeinfo *binfo; /* The state of the parent. */
68 struct csa_card *card;
71 /* Contents of board's registers */
75 struct csa_chinfo pch, rch;
78 /* -------------------------------------------------------------------- */
81 static int csa_init(struct csa_info *);
82 static void csa_intr(void *);
83 static void csa_setplaysamplerate(csa_res *resp, u_long ulInRate);
84 static void csa_setcapturesamplerate(csa_res *resp, u_long ulOutRate);
85 static void csa_startplaydma(struct csa_info *csa);
86 static void csa_startcapturedma(struct csa_info *csa);
87 static void csa_stopplaydma(struct csa_info *csa);
88 static void csa_stopcapturedma(struct csa_info *csa);
89 static int csa_startdsp(csa_res *resp);
90 static int csa_allocres(struct csa_info *scp, device_t dev);
91 static void csa_releaseres(struct csa_info *scp, device_t dev);
93 static u_int32_t csa_playfmt[] = {
95 AFMT_STEREO | AFMT_U8,
97 AFMT_STEREO | AFMT_S8,
99 AFMT_STEREO | AFMT_S16_LE,
101 AFMT_STEREO | AFMT_S16_BE,
104 static struct pcmchan_caps csa_playcaps = {8000, 48000, csa_playfmt, 0};
106 static u_int32_t csa_recfmt[] = {
108 AFMT_STEREO | AFMT_S16_LE,
111 static struct pcmchan_caps csa_reccaps = {11025, 48000, csa_recfmt, 0};
113 /* -------------------------------------------------------------------- */
116 csa_active(struct csa_info *csa, int run)
123 if ((csa->active == 0 && old == 1) || (csa->active == 1 && old == 0)) {
125 if (csa->card->active)
126 return csa->card->active(go);
131 /* -------------------------------------------------------------------- */
135 csa_rdcd(kobj_t obj, void *devinfo, int regno)
138 struct csa_info *csa = (struct csa_info *)devinfo;
141 if (csa_readcodec(&csa->res, regno + BA0_AC97_RESET, &data))
149 csa_wrcd(kobj_t obj, void *devinfo, int regno, u_int32_t data)
151 struct csa_info *csa = (struct csa_info *)devinfo;
154 csa_writecodec(&csa->res, regno + BA0_AC97_RESET, data);
160 static kobj_method_t csa_ac97_methods[] = {
161 KOBJMETHOD(ac97_read, csa_rdcd),
162 KOBJMETHOD(ac97_write, csa_wrcd),
165 AC97_DECLARE(csa_ac97);
168 csa_setplaysamplerate(csa_res *resp, u_long ulInRate)
170 u_long ulTemp1, ulTemp2;
172 u_long ulCorrectionPerGOF, ulCorrectionPerSec;
178 * Compute the values used to drive the actual sample rate conversion.
179 * The following formulas are being computed, using inline assembly
180 * since we need to use 64 bit arithmetic to compute the values:
182 * ulPhiIncr = floor((Fs,in * 2^26) / Fs,out)
183 * ulCorrectionPerGOF = floor((Fs,in * 2^26 - Fs,out * ulPhiIncr) /
185 * ulCorrectionPerSec = Fs,in * 2^26 - Fs,out * phiIncr -
186 * GOF_PER_SEC * ulCorrectionPerGOF
190 * ulPhiIncr:ulOther = dividend:remainder((Fs,in * 2^26) / Fs,out)
191 * ulCorrectionPerGOF:ulCorrectionPerSec =
192 * dividend:remainder(ulOther / GOF_PER_SEC)
194 ulTemp1 = ulInRate << 16;
195 ulPhiIncr = ulTemp1 / ulOutRate;
196 ulTemp1 -= ulPhiIncr * ulOutRate;
199 ulTemp2 = ulTemp1 / ulOutRate;
200 ulPhiIncr += ulTemp2;
201 ulTemp1 -= ulTemp2 * ulOutRate;
202 ulCorrectionPerGOF = ulTemp1 / GOF_PER_SEC;
203 ulTemp1 -= ulCorrectionPerGOF * GOF_PER_SEC;
204 ulCorrectionPerSec = ulTemp1;
207 * Fill in the SampleRateConverter control block.
209 csa_writemem(resp, BA1_PSRC, ((ulCorrectionPerSec << 16) & 0xFFFF0000) | (ulCorrectionPerGOF & 0xFFFF));
210 csa_writemem(resp, BA1_PPI, ulPhiIncr);
214 csa_setcapturesamplerate(csa_res *resp, u_long ulOutRate)
216 u_long ulPhiIncr, ulCoeffIncr, ulTemp1, ulTemp2;
217 u_long ulCorrectionPerGOF, ulCorrectionPerSec, ulInitialDelay;
218 u_long dwFrameGroupLength, dwCnt;
224 * We can only decimate by up to a factor of 1/9th the hardware rate.
225 * Return an error if an attempt is made to stray outside that limit.
227 if((ulOutRate * 9) < ulInRate)
231 * We can not capture at at rate greater than the Input Rate (48000).
232 * Return an error if an attempt is made to stray outside that limit.
234 if(ulOutRate > ulInRate)
238 * Compute the values used to drive the actual sample rate conversion.
239 * The following formulas are being computed, using inline assembly
240 * since we need to use 64 bit arithmetic to compute the values:
242 * ulCoeffIncr = -floor((Fs,out * 2^23) / Fs,in)
243 * ulPhiIncr = floor((Fs,in * 2^26) / Fs,out)
244 * ulCorrectionPerGOF = floor((Fs,in * 2^26 - Fs,out * ulPhiIncr) /
246 * ulCorrectionPerSec = Fs,in * 2^26 - Fs,out * phiIncr -
247 * GOF_PER_SEC * ulCorrectionPerGOF
248 * ulInitialDelay = ceil((24 * Fs,in) / Fs,out)
252 * ulCoeffIncr = neg(dividend((Fs,out * 2^23) / Fs,in))
253 * ulPhiIncr:ulOther = dividend:remainder((Fs,in * 2^26) / Fs,out)
254 * ulCorrectionPerGOF:ulCorrectionPerSec =
255 * dividend:remainder(ulOther / GOF_PER_SEC)
256 * ulInitialDelay = dividend(((24 * Fs,in) + Fs,out - 1) / Fs,out)
258 ulTemp1 = ulOutRate << 16;
259 ulCoeffIncr = ulTemp1 / ulInRate;
260 ulTemp1 -= ulCoeffIncr * ulInRate;
263 ulCoeffIncr += ulTemp1 / ulInRate;
264 ulCoeffIncr ^= 0xFFFFFFFF;
266 ulTemp1 = ulInRate << 16;
267 ulPhiIncr = ulTemp1 / ulOutRate;
268 ulTemp1 -= ulPhiIncr * ulOutRate;
271 ulTemp2 = ulTemp1 / ulOutRate;
272 ulPhiIncr += ulTemp2;
273 ulTemp1 -= ulTemp2 * ulOutRate;
274 ulCorrectionPerGOF = ulTemp1 / GOF_PER_SEC;
275 ulTemp1 -= ulCorrectionPerGOF * GOF_PER_SEC;
276 ulCorrectionPerSec = ulTemp1;
277 ulInitialDelay = ((ulInRate * 24) + ulOutRate - 1) / ulOutRate;
280 * Fill in the VariDecimate control block.
282 csa_writemem(resp, BA1_CSRC,
283 ((ulCorrectionPerSec << 16) & 0xFFFF0000) | (ulCorrectionPerGOF & 0xFFFF));
284 csa_writemem(resp, BA1_CCI, ulCoeffIncr);
285 csa_writemem(resp, BA1_CD,
286 (((BA1_VARIDEC_BUF_1 + (ulInitialDelay << 2)) << 16) & 0xFFFF0000) | 0x80);
287 csa_writemem(resp, BA1_CPI, ulPhiIncr);
290 * Figure out the frame group length for the write back task. Basically,
291 * this is just the factors of 24000 (2^6*3*5^3) that are not present in
292 * the output sample rate.
294 dwFrameGroupLength = 1;
295 for(dwCnt = 2; dwCnt <= 64; dwCnt *= 2)
297 if(((ulOutRate / dwCnt) * dwCnt) !=
300 dwFrameGroupLength *= 2;
303 if(((ulOutRate / 3) * 3) !=
306 dwFrameGroupLength *= 3;
308 for(dwCnt = 5; dwCnt <= 125; dwCnt *= 5)
310 if(((ulOutRate / dwCnt) * dwCnt) !=
313 dwFrameGroupLength *= 5;
318 * Fill in the WriteBack control block.
320 csa_writemem(resp, BA1_CFG1, dwFrameGroupLength);
321 csa_writemem(resp, BA1_CFG2, (0x00800000 | dwFrameGroupLength));
322 csa_writemem(resp, BA1_CCST, 0x0000FFFF);
323 csa_writemem(resp, BA1_CSPB, ((65536 * ulOutRate) / 24000));
324 csa_writemem(resp, (BA1_CSPB + 4), 0x0000FFFF);
328 csa_startplaydma(struct csa_info *csa)
335 ul = csa_readmem(resp, BA1_PCTL);
337 csa_writemem(resp, BA1_PCTL, ul | csa->pctl);
338 csa_writemem(resp, BA1_PVOL, 0x80008000);
344 csa_startcapturedma(struct csa_info *csa)
351 ul = csa_readmem(resp, BA1_CCTL);
353 csa_writemem(resp, BA1_CCTL, ul | csa->cctl);
354 csa_writemem(resp, BA1_CVOL, 0x80008000);
360 csa_stopplaydma(struct csa_info *csa)
367 ul = csa_readmem(resp, BA1_PCTL);
368 csa->pctl = ul & 0xffff0000;
369 csa_writemem(resp, BA1_PCTL, ul & 0x0000ffff);
370 csa_writemem(resp, BA1_PVOL, 0xffffffff);
374 * The bitwise pointer of the serial FIFO in the DSP
375 * seems to make an error upon starting or stopping the
376 * DSP. Clear the FIFO and correct the pointer if we
380 csa_clearserialfifos(resp);
381 csa_writeio(resp, BA0_SERBSP, 0);
387 csa_stopcapturedma(struct csa_info *csa)
394 ul = csa_readmem(resp, BA1_CCTL);
395 csa->cctl = ul & 0x0000ffff;
396 csa_writemem(resp, BA1_CCTL, ul & 0xffff0000);
397 csa_writemem(resp, BA1_CVOL, 0xffffffff);
401 * The bitwise pointer of the serial FIFO in the DSP
402 * seems to make an error upon starting or stopping the
403 * DSP. Clear the FIFO and correct the pointer if we
407 csa_clearserialfifos(resp);
408 csa_writeio(resp, BA0_SERBSP, 0);
414 csa_startdsp(csa_res *resp)
420 * Set the frame timer to reflect the number of cycles per frame.
422 csa_writemem(resp, BA1_FRMT, 0xadf);
425 * Turn on the run, run at frame, and DMA enable bits in the local copy of
426 * the SP control register.
428 csa_writemem(resp, BA1_SPCR, SPCR_RUN | SPCR_RUNFR | SPCR_DRQEN);
431 * Wait until the run at frame bit resets itself in the SP control
435 for (i = 0 ; i < 25 ; i++) {
437 * Wait a little bit, so we don't issue PCI reads too frequently.
441 * Fetch the current value of the SP status register.
443 ul = csa_readmem(resp, BA1_SPCR);
446 * If the run at frame bit has reset, then stop waiting.
448 if((ul & SPCR_RUNFR) == 0)
452 * If the run at frame bit never reset, then return an error.
454 if((ul & SPCR_RUNFR) != 0)
461 csa_setupchan(struct csa_chinfo *ch)
463 struct csa_info *csa = ch->parent;
464 csa_res *resp = &csa->res;
467 if (ch->dir == PCMDIR_PLAY) {
469 csa_writemem(resp, BA1_PBA, vtophys(sndbuf_getbuf(ch->buffer)));
472 csa->pfie = csa_readmem(resp, BA1_PFIE) & ~0x0000f03f;
473 if (!(ch->fmt & AFMT_SIGNED))
475 if (ch->fmt & AFMT_BIGENDIAN)
477 if (!(ch->fmt & AFMT_STEREO))
479 if (ch->fmt & AFMT_8BIT)
481 csa_writemem(resp, BA1_PFIE, csa->pfie);
484 if (ch->fmt & AFMT_16BIT)
486 if (ch->fmt & AFMT_STEREO)
490 pdtc = csa_readmem(resp, BA1_PDTC) & ~0x000001ff;
492 csa_writemem(resp, BA1_PDTC, pdtc);
495 csa_setplaysamplerate(resp, ch->spd);
496 } else if (ch->dir == PCMDIR_REC) {
498 csa_writemem(resp, BA1_CBA, vtophys(sndbuf_getbuf(ch->buffer)));
501 csa_writemem(resp, BA1_CIE, (csa_readmem(resp, BA1_CIE) & ~0x0000003f) | 0x00000001);
504 csa_setcapturesamplerate(resp, ch->spd);
509 /* -------------------------------------------------------------------- */
510 /* channel interface */
513 csachan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
515 struct csa_info *csa = devinfo;
516 struct csa_chinfo *ch = (dir == PCMDIR_PLAY)? &csa->pch : &csa->rch;
522 if (sndbuf_alloc(ch->buffer, csa->parent_dmat, CS461x_BUFFSIZE) == -1) return NULL;
527 csachan_setformat(kobj_t obj, void *data, u_int32_t format)
529 struct csa_chinfo *ch = data;
536 csachan_setspeed(kobj_t obj, void *data, u_int32_t speed)
538 struct csa_chinfo *ch = data;
541 return ch->spd; /* XXX calc real speed */
545 csachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
547 return CS461x_BUFFSIZE / 2;
551 csachan_trigger(kobj_t obj, void *data, int go)
553 struct csa_chinfo *ch = data;
554 struct csa_info *csa = ch->parent;
556 if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
559 if (go == PCMTRIG_START) {
562 if (ch->dir == PCMDIR_PLAY)
563 csa_startplaydma(csa);
565 csa_startcapturedma(csa);
567 if (ch->dir == PCMDIR_PLAY)
568 csa_stopplaydma(csa);
570 csa_stopcapturedma(csa);
577 csachan_getptr(kobj_t obj, void *data)
579 struct csa_chinfo *ch = data;
580 struct csa_info *csa = ch->parent;
586 if (ch->dir == PCMDIR_PLAY) {
587 ptr = csa_readmem(resp, BA1_PBA) - vtophys(sndbuf_getbuf(ch->buffer));
588 if ((ch->fmt & AFMT_U8) != 0 || (ch->fmt & AFMT_S8) != 0)
591 ptr = csa_readmem(resp, BA1_CBA) - vtophys(sndbuf_getbuf(ch->buffer));
592 if ((ch->fmt & AFMT_U8) != 0 || (ch->fmt & AFMT_S8) != 0)
599 static struct pcmchan_caps *
600 csachan_getcaps(kobj_t obj, void *data)
602 struct csa_chinfo *ch = data;
603 return (ch->dir == PCMDIR_PLAY)? &csa_playcaps : &csa_reccaps;
606 static kobj_method_t csachan_methods[] = {
607 KOBJMETHOD(channel_init, csachan_init),
608 KOBJMETHOD(channel_setformat, csachan_setformat),
609 KOBJMETHOD(channel_setspeed, csachan_setspeed),
610 KOBJMETHOD(channel_setblocksize, csachan_setblocksize),
611 KOBJMETHOD(channel_trigger, csachan_trigger),
612 KOBJMETHOD(channel_getptr, csachan_getptr),
613 KOBJMETHOD(channel_getcaps, csachan_getcaps),
616 CHANNEL_DECLARE(csachan);
618 /* -------------------------------------------------------------------- */
619 /* The interrupt handler */
623 struct csa_info *csa = p;
625 if ((csa->binfo->hisr & HISR_VC0) != 0)
626 chn_intr(csa->pch.channel);
627 if ((csa->binfo->hisr & HISR_VC1) != 0)
628 chn_intr(csa->rch.channel);
631 /* -------------------------------------------------------------------- */
634 * Probe and attach the card
638 csa_init(struct csa_info *csa)
645 csa_stopplaydma(csa);
646 csa_stopcapturedma(csa);
648 if (csa_startdsp(resp))
651 /* Crank up the power on the DAC and ADC. */
652 csa_setplaysamplerate(resp, 8000);
653 csa_setcapturesamplerate(resp, 8000);
658 /* Allocates resources. */
660 csa_allocres(struct csa_info *csa, device_t dev)
665 if (resp->io == NULL) {
666 resp->io = bus_alloc_resource(dev, SYS_RES_MEMORY, &resp->io_rid, 0, ~0, 1, RF_ACTIVE);
667 if (resp->io == NULL)
670 if (resp->mem == NULL) {
671 resp->mem = bus_alloc_resource(dev, SYS_RES_MEMORY, &resp->mem_rid, 0, ~0, 1, RF_ACTIVE);
672 if (resp->mem == NULL)
675 if (resp->irq == NULL) {
676 resp->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &resp->irq_rid, 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
677 if (resp->irq == NULL)
680 if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/CS461x_BUFFSIZE, /*boundary*/CS461x_BUFFSIZE,
681 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
682 /*highaddr*/BUS_SPACE_MAXADDR,
683 /*filter*/NULL, /*filterarg*/NULL,
684 /*maxsize*/CS461x_BUFFSIZE, /*nsegments*/1, /*maxsegz*/0x3ffff,
685 /*flags*/0, &csa->parent_dmat) != 0)
691 /* Releases resources. */
693 csa_releaseres(struct csa_info *csa, device_t dev)
698 if (resp->irq != NULL) {
700 bus_teardown_intr(dev, resp->irq, csa->ih);
701 bus_release_resource(dev, SYS_RES_IRQ, resp->irq_rid, resp->irq);
704 if (resp->io != NULL) {
705 bus_release_resource(dev, SYS_RES_MEMORY, resp->io_rid, resp->io);
708 if (resp->mem != NULL) {
709 bus_release_resource(dev, SYS_RES_MEMORY, resp->mem_rid, resp->mem);
712 if (csa->parent_dmat != NULL) {
713 bus_dma_tag_destroy(csa->parent_dmat);
714 csa->parent_dmat = NULL;
723 pcmcsa_probe(device_t dev)
726 struct sndcard_func *func;
728 /* The parent device has already been probed. */
730 func = device_get_ivars(dev);
731 if (func == NULL || func->func != SCF_PCM)
734 s = "CS461x PCM Audio";
736 device_set_desc(dev, s);
741 pcmcsa_attach(device_t dev)
743 struct csa_info *csa;
746 char status[SND_STATUSLEN];
747 struct ac97_info *codec;
748 struct sndcard_func *func;
750 csa = malloc(sizeof(*csa), M_DEVBUF, M_NOWAIT | M_ZERO);
753 unit = device_get_unit(dev);
754 func = device_get_ivars(dev);
755 csa->binfo = func->varinfo;
757 * Fake the status of DMA so that the initial value of
758 * PCTL and CCTL can be stored into csa->pctl and csa->cctl,
761 csa->pch.dma = csa->rch.dma = 1;
763 csa->card = csa->binfo->card;
765 /* Allocate the resources. */
767 resp->io_rid = PCIR_MAPS;
768 resp->mem_rid = PCIR_MAPS + 4;
770 if (csa_allocres(csa, dev)) {
771 csa_releaseres(csa, dev);
777 csa_releaseres(csa, dev);
780 codec = AC97_CREATE(dev, csa, csa_ac97);
782 csa_releaseres(csa, dev);
785 if (csa->card->inv_eapd)
786 ac97_setflags(codec, AC97_F_EAPD_INV);
787 if (mixer_init(dev, ac97_getmixerclass(), codec) == -1) {
789 csa_releaseres(csa, dev);
793 snprintf(status, SND_STATUSLEN, "at irq %ld", rman_get_start(resp->irq));
795 /* Enable interrupt. */
796 if (snd_setup_intr(dev, resp->irq, INTR_MPSAFE, csa_intr, csa, &csa->ih)) {
798 csa_releaseres(csa, dev);
801 csa_writemem(resp, BA1_PFIE, csa_readmem(resp, BA1_PFIE) & ~0x0000f03f);
802 csa_writemem(resp, BA1_CIE, (csa_readmem(resp, BA1_CIE) & ~0x0000003f) | 0x00000001);
805 if (pcm_register(dev, csa, 1, 1)) {
807 csa_releaseres(csa, dev);
810 pcm_addchan(dev, PCMDIR_REC, &csachan_class, csa);
811 pcm_addchan(dev, PCMDIR_PLAY, &csachan_class, csa);
812 pcm_setstatus(dev, status);
818 pcmcsa_detach(device_t dev)
821 struct csa_info *csa;
823 r = pcm_unregister(dev);
827 csa = pcm_getdevinfo(dev);
828 csa_releaseres(csa, dev);
833 static device_method_t pcmcsa_methods[] = {
834 /* Device interface */
835 DEVMETHOD(device_probe , pcmcsa_probe ),
836 DEVMETHOD(device_attach, pcmcsa_attach),
837 DEVMETHOD(device_detach, pcmcsa_detach),
842 static driver_t pcmcsa_driver = {
848 DRIVER_MODULE(snd_csapcm, csa, pcmcsa_driver, pcm_devclass, 0, 0);
849 MODULE_DEPEND(snd_csapcm, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
850 MODULE_DEPEND(snd_csapcm, snd_csa, 1, 1, 1);
851 MODULE_VERSION(snd_csapcm, 1);