ad1816.c revision 70291 
1/*
2 * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
3 * Copyright Luigi Rizzo, 1997,1998
4 * Copyright by Hannu Savolainen 1994, 1995
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: head/sys/dev/sound/isa/ad1816.c 70291 2000-12-23 03:16:13Z cg $
29 */
30
31#include <dev/sound/pcm/sound.h>
32#include <dev/sound/isa/ad1816.h>
33
34#include "mixer_if.h"
35
36struct ad1816_info;
37
38struct ad1816_chinfo {
39	struct ad1816_info *parent;
40	pcm_channel *channel;
41	snd_dbuf *buffer;
42	int dir, blksz;
43};
44
45struct ad1816_info {
46    struct resource *io_base;	/* primary I/O address for the board */
47    int		     io_rid;
48    struct resource *irq;
49    int		     irq_rid;
50    struct resource *drq1; /* play */
51    int		     drq1_rid;
52    struct resource *drq2; /* rec */
53    int		     drq2_rid;
54    void 	    *ih;
55    bus_dma_tag_t    parent_dmat;
56
57    struct ad1816_chinfo pch, rch;
58};
59
60static driver_intr_t 	ad1816_intr;
61static int 		ad1816_probe(device_t dev);
62static int 		ad1816_attach(device_t dev);
63
64/* IO primitives */
65static int      	ad1816_wait_init(struct ad1816_info *ad1816, int x);
66static u_short		ad1816_read(struct ad1816_info *ad1816, u_int reg);
67static void     	ad1816_write(struct ad1816_info *ad1816, u_int reg, u_short data);
68
69static devclass_t pcm_devclass;
70
71static u_int32_t ad1816_fmt[] = {
72	AFMT_U8,
73	AFMT_STEREO | AFMT_U8,
74	AFMT_S16_LE,
75	AFMT_STEREO | AFMT_S16_LE,
76	AFMT_MU_LAW,
77	AFMT_STEREO | AFMT_MU_LAW,
78	AFMT_A_LAW,
79	AFMT_STEREO | AFMT_A_LAW,
80	0
81};
82
83static pcmchan_caps ad1816_caps = {4000, 55200, ad1816_fmt, 0};
84
85#define AD1816_MUTE 31		/* value for mute */
86
87static int
88port_rd(struct resource *port, int off)
89{
90	if (port)
91		return bus_space_read_1(rman_get_bustag(port),
92					rman_get_bushandle(port),
93					off);
94	else
95		return -1;
96}
97
98static void
99port_wr(struct resource *port, int off, u_int8_t data)
100{
101	if (port)
102		return bus_space_write_1(rman_get_bustag(port),
103					 rman_get_bushandle(port),
104					 off, data);
105}
106
107static int
108io_rd(struct ad1816_info *ad1816, int reg)
109{
110	return port_rd(ad1816->io_base, reg);
111}
112
113static void
114io_wr(struct ad1816_info *ad1816, int reg, u_int8_t data)
115{
116	return port_wr(ad1816->io_base, reg, data);
117}
118
119static void
120ad1816_intr(void *arg)
121{
122    	struct ad1816_info *ad1816 = (struct ad1816_info *)arg;
123    	unsigned char   c, served = 0;
124
125    	/* get interupt status */
126    	c = io_rd(ad1816, AD1816_INT);
127
128    	/* check for stray interupts */
129    	if (c & ~(AD1816_INTRCI | AD1816_INTRPI)) {
130		printf("pcm: stray int (%x)\n", c);
131		c &= AD1816_INTRCI | AD1816_INTRPI;
132    	}
133    	/* check for capture interupt */
134    	if (sndbuf_runsz(ad1816->rch.buffer) && (c & AD1816_INTRCI)) {
135		chn_intr(ad1816->rch.channel);
136		served |= AD1816_INTRCI;		/* cp served */
137    	}
138    	/* check for playback interupt */
139    	if (sndbuf_runsz(ad1816->pch.buffer) && (c & AD1816_INTRPI)) {
140		chn_intr(ad1816->pch.channel);
141		served |= AD1816_INTRPI;		/* pb served */
142    	}
143    	if (served == 0) {
144		/* this probably means this is not a (working) ad1816 chip, */
145		/* or an error in dma handling                              */
146		printf("pcm: int without reason (%x)\n", c);
147		c = 0;
148    	} else c &= ~served;
149    	io_wr(ad1816, AD1816_INT, c);
150    	c = io_rd(ad1816, AD1816_INT);
151    	if (c != 0) printf("pcm: int clear failed (%x)\n", c);
152}
153
154static int
155ad1816_wait_init(struct ad1816_info *ad1816, int x)
156{
157    	int             n = 0;	/* to shut up the compiler... */
158
159    	for (; x--;)
160		if ((n = (io_rd(ad1816, AD1816_ALE) & AD1816_BUSY)) == 0) DELAY(10);
161		else return n;
162    	printf("ad1816_wait_init failed 0x%02x.\n", n);
163    	return -1;
164}
165
166static unsigned short
167ad1816_read(struct ad1816_info *ad1816, unsigned int reg)
168{
169    	int             flags;
170    	u_short         x = 0;
171
172    	/* we don't want to be blocked here */
173    	flags = spltty();
174    	if (ad1816_wait_init(ad1816, 100) == -1) return 0;
175    	io_wr(ad1816, AD1816_ALE, 0);
176    	io_wr(ad1816, AD1816_ALE, (reg & AD1816_ALEMASK));
177    	if (ad1816_wait_init(ad1816, 100) == -1) return 0;
178    	x = (io_rd(ad1816, AD1816_HIGH) << 8) | io_rd(ad1816, AD1816_LOW);
179    	splx(flags);
180    	return x;
181}
182
183static void
184ad1816_write(struct ad1816_info *ad1816, unsigned int reg, unsigned short data)
185{
186    	int             flags;
187
188    	flags = spltty();
189    	if (ad1816_wait_init(ad1816, 100) == -1) return;
190    	io_wr(ad1816, AD1816_ALE, (reg & AD1816_ALEMASK));
191    	io_wr(ad1816, AD1816_LOW,  (data & 0x000000ff));
192    	io_wr(ad1816, AD1816_HIGH, (data & 0x0000ff00) >> 8);
193    	splx(flags);
194}
195
196/* -------------------------------------------------------------------- */
197
198static int
199ad1816mix_init(snd_mixer *m)
200{
201	mix_setdevs(m, AD1816_MIXER_DEVICES);
202	mix_setrecdevs(m, AD1816_REC_DEVICES);
203	return 0;
204}
205
206static int
207ad1816mix_set(snd_mixer *m, unsigned dev, unsigned left, unsigned right)
208{
209	struct ad1816_info *ad1816 = mix_getdevinfo(m);
210    	u_short reg = 0;
211
212    	/* Scale volumes */
213    	left = AD1816_MUTE - (AD1816_MUTE * left) / 100;
214    	right = AD1816_MUTE - (AD1816_MUTE * right) / 100;
215
216    	reg = (left << 8) | right;
217
218    	/* do channel selective muting if volume is zero */
219    	if (left == AD1816_MUTE)	reg |= 0x8000;
220    	if (right == AD1816_MUTE)	reg |= 0x0080;
221
222    	switch (dev) {
223    	case SOUND_MIXER_VOLUME:	/* Register 14 master volume */
224		ad1816_write(ad1816, 14, reg);
225		break;
226
227    	case SOUND_MIXER_CD:	/* Register 15 cd */
228    	case SOUND_MIXER_LINE1:
229		ad1816_write(ad1816, 15, reg);
230		break;
231
232    	case SOUND_MIXER_SYNTH:	/* Register 16 synth */
233		ad1816_write(ad1816, 16, reg);
234		break;
235
236    	case SOUND_MIXER_PCM:	/* Register 4 pcm */
237		ad1816_write(ad1816, 4, reg);
238		break;
239
240    	case SOUND_MIXER_LINE:
241    	case SOUND_MIXER_LINE3:	/* Register 18 line in */
242		ad1816_write(ad1816, 18, reg);
243		break;
244
245    	case SOUND_MIXER_MIC:	/* Register 19 mic volume */
246		ad1816_write(ad1816, 19, reg & ~0xff);	/* mic is mono */
247		break;
248
249    	case SOUND_MIXER_IGAIN:
250		/* and now to something completely different ... */
251		ad1816_write(ad1816, 20, ((ad1816_read(ad1816, 20) & ~0x0f0f)
252	      	| (((AD1816_MUTE - left) / 2) << 8) /* four bits of adc gain */
253	      	| ((AD1816_MUTE - right) / 2)));
254		break;
255
256    	default:
257		printf("ad1816_mixer_set(): unknown device.\n");
258		break;
259    	}
260
261    	left = ((AD1816_MUTE - left) * 100) / AD1816_MUTE;
262    	right = ((AD1816_MUTE - right) * 100) / AD1816_MUTE;
263
264    	return left | (right << 8);
265}
266
267static int
268ad1816mix_setrecsrc(snd_mixer *m, u_int32_t src)
269{
270	struct ad1816_info *ad1816 = mix_getdevinfo(m);
271    	int dev;
272
273    	switch (src) {
274    	case SOUND_MASK_LINE:
275    	case SOUND_MASK_LINE3:
276		dev = 0x00;
277		break;
278
279    	case SOUND_MASK_CD:
280    	case SOUND_MASK_LINE1:
281		dev = 0x20;
282		break;
283
284    	case SOUND_MASK_MIC:
285    	default:
286		dev = 0x50;
287		src = SOUND_MASK_MIC;
288    	}
289
290    	dev |= dev << 8;
291    	ad1816_write(ad1816, 20, (ad1816_read(ad1816, 20) & ~0x7070) | dev);
292    	return src;
293}
294
295static kobj_method_t ad1816mixer_methods[] = {
296    	KOBJMETHOD(mixer_init,		ad1816mix_init),
297    	KOBJMETHOD(mixer_set,		ad1816mix_set),
298    	KOBJMETHOD(mixer_setrecsrc,	ad1816mix_setrecsrc),
299	{ 0, 0 }
300};
301MIXER_DECLARE(ad1816mixer);
302
303/* -------------------------------------------------------------------- */
304/* channel interface */
305static void *
306ad1816chan_init(kobj_t obj, void *devinfo, snd_dbuf *b, pcm_channel *c, int dir)
307{
308	struct ad1816_info *ad1816 = devinfo;
309	struct ad1816_chinfo *ch = (dir == PCMDIR_PLAY)? &ad1816->pch : &ad1816->rch;
310
311	ch->parent = ad1816;
312	ch->channel = c;
313	ch->buffer = b;
314	if (sndbuf_alloc(ch->buffer, ad1816->parent_dmat, DSP_BUFFSIZE) == -1) return NULL;
315	return ch;
316}
317
318static int
319ad1816chan_setdir(kobj_t obj, void *data, int dir)
320{
321	struct ad1816_chinfo *ch = data;
322  	struct ad1816_info *ad1816 = ch->parent;
323
324	sndbuf_isadmasetup(ch->buffer, (dir == PCMDIR_PLAY)? ad1816->drq1 : ad1816->drq2);
325	ch->dir = dir;
326	return 0;
327}
328
329static int
330ad1816chan_setformat(kobj_t obj, void *data, u_int32_t format)
331{
332	struct ad1816_chinfo *ch = data;
333  	struct ad1816_info *ad1816 = ch->parent;
334
335    	int fmt = AD1816_U8, reg;
336    	if (ch->dir == PCMDIR_PLAY) {
337        	reg = AD1816_PLAY;
338        	ad1816_write(ad1816, 8, 0x0000);	/* reset base and current counter */
339        	ad1816_write(ad1816, 9, 0x0000);	/* for playback and capture */
340    	} else {
341        	reg = AD1816_CAPT;
342        	ad1816_write(ad1816, 10, 0x0000);
343        	ad1816_write(ad1816, 11, 0x0000);
344    	}
345    	switch (format & ~AFMT_STEREO) {
346    	case AFMT_A_LAW:
347        	fmt = AD1816_ALAW;
348		break;
349
350    	case AFMT_MU_LAW:
351		fmt = AD1816_MULAW;
352		break;
353
354    	case AFMT_S16_LE:
355		fmt = AD1816_S16LE;
356		break;
357
358    	case AFMT_S16_BE:
359		fmt = AD1816_S16BE;
360		break;
361
362    	case AFMT_U8:
363		fmt = AD1816_U8;
364		break;
365    	}
366    	if (format & AFMT_STEREO) fmt |= AD1816_STEREO;
367    	io_wr(ad1816, reg, fmt);
368    	return format;
369}
370
371static int
372ad1816chan_setspeed(kobj_t obj, void *data, u_int32_t speed)
373{
374	struct ad1816_chinfo *ch = data;
375    	struct ad1816_info *ad1816 = ch->parent;
376
377    	RANGE(speed, 4000, 55200);
378    	ad1816_write(ad1816, (ch->dir == PCMDIR_PLAY)? 2 : 3, speed);
379    	return speed;
380}
381
382static int
383ad1816chan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
384{
385	struct ad1816_chinfo *ch = data;
386
387	ch->blksz = blocksize;
388	return ch->blksz;
389}
390
391static int
392ad1816chan_trigger(kobj_t obj, void *data, int go)
393{
394	struct ad1816_chinfo *ch = data;
395    	struct ad1816_info *ad1816 = ch->parent;
396    	int wr, reg;
397
398	if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
399		return 0;
400
401	sndbuf_isadma(ch->buffer, go);
402    	wr = (ch->dir == PCMDIR_PLAY);
403    	reg = wr? AD1816_PLAY : AD1816_CAPT;
404    	switch (go) {
405    	case PCMTRIG_START:
406		/* start only if not already running */
407		if (!(io_rd(ad1816, reg) & AD1816_ENABLE)) {
408	    		int cnt = ((ch->blksz) >> 2) - 1;
409	    		ad1816_write(ad1816, wr? 8 : 10, cnt); /* count */
410	    		ad1816_write(ad1816, wr? 9 : 11, 0); /* reset cur cnt */
411	    		ad1816_write(ad1816, 1, ad1816_read(ad1816, 1) |
412				     (wr? 0x8000 : 0x4000)); /* enable int */
413	    		/* enable playback */
414	    		io_wr(ad1816, reg, io_rd(ad1816, reg) | AD1816_ENABLE);
415	    		if (!(io_rd(ad1816, reg) & AD1816_ENABLE))
416				printf("ad1816: failed to start %s DMA!\n",
417				       wr? "play" : "rec");
418		}
419		break;
420
421    	case PCMTRIG_STOP:
422    	case PCMTRIG_ABORT:		/* XXX check this... */
423		/* we don't test here if it is running... */
424		if (wr) {
425	    		ad1816_write(ad1816, 1, ad1816_read(ad1816, 1) &
426				     ~(wr? 0x8000 : 0x4000));
427	    		/* disable int */
428	    		io_wr(ad1816, reg, io_rd(ad1816, reg) & ~AD1816_ENABLE);
429	    		/* disable playback */
430	    		if (io_rd(ad1816, reg) & AD1816_ENABLE)
431				printf("ad1816: failed to stop %s DMA!\n",
432				       wr? "play" : "rec");
433	    		ad1816_write(ad1816, wr? 8 : 10, 0); /* reset base cnt */
434	    		ad1816_write(ad1816, wr? 9 : 11, 0); /* reset cur cnt */
435		}
436		break;
437    	}
438    	return 0;
439}
440
441static int
442ad1816chan_getptr(kobj_t obj, void *data)
443{
444	struct ad1816_chinfo *ch = data;
445	return sndbuf_isadmaptr(ch->buffer);
446}
447
448static pcmchan_caps *
449ad1816chan_getcaps(kobj_t obj, void *data)
450{
451	return &ad1816_caps;
452}
453
454static kobj_method_t ad1816chan_methods[] = {
455    	KOBJMETHOD(channel_init,		ad1816chan_init),
456    	KOBJMETHOD(channel_setdir,		ad1816chan_setdir),
457    	KOBJMETHOD(channel_setformat,		ad1816chan_setformat),
458    	KOBJMETHOD(channel_setspeed,		ad1816chan_setspeed),
459    	KOBJMETHOD(channel_setblocksize,	ad1816chan_setblocksize),
460    	KOBJMETHOD(channel_trigger,		ad1816chan_trigger),
461    	KOBJMETHOD(channel_getptr,		ad1816chan_getptr),
462    	KOBJMETHOD(channel_getcaps,		ad1816chan_getcaps),
463	{ 0, 0 }
464};
465CHANNEL_DECLARE(ad1816chan);
466
467/* -------------------------------------------------------------------- */
468
469static void
470ad1816_release_resources(struct ad1816_info *ad1816, device_t dev)
471{
472    	if (ad1816->irq) {
473   		if (ad1816->ih)
474			bus_teardown_intr(dev, ad1816->irq, ad1816->ih);
475		bus_release_resource(dev, SYS_RES_IRQ, ad1816->irq_rid,
476				     ad1816->irq);
477		ad1816->irq = 0;
478    	}
479    	if (ad1816->drq1) {
480		bus_release_resource(dev, SYS_RES_DRQ, ad1816->drq1_rid,
481				     ad1816->drq1);
482		ad1816->drq1 = 0;
483    	}
484    	if (ad1816->drq2) {
485		bus_release_resource(dev, SYS_RES_DRQ, ad1816->drq2_rid,
486				     ad1816->drq2);
487		ad1816->drq2 = 0;
488    	}
489    	if (ad1816->io_base) {
490		bus_release_resource(dev, SYS_RES_IOPORT, ad1816->io_rid,
491				     ad1816->io_base);
492		ad1816->io_base = 0;
493    	}
494    	if (ad1816->parent_dmat) {
495		bus_dma_tag_destroy(ad1816->parent_dmat);
496		ad1816->parent_dmat = 0;
497    	}
498     	free(ad1816, M_DEVBUF);
499}
500
501static int
502ad1816_alloc_resources(struct ad1816_info *ad1816, device_t dev)
503{
504    	int ok = 1, pdma, rdma;
505	if (!ad1816->io_base)
506    		ad1816->io_base = bus_alloc_resource(dev, SYS_RES_IOPORT, &ad1816->io_rid,
507						  0, ~0, 1, RF_ACTIVE);
508	if (!ad1816->irq)
509    		ad1816->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &ad1816->irq_rid,
510					      0, ~0, 1, RF_ACTIVE);
511	if (!ad1816->drq1)
512    		ad1816->drq1 = bus_alloc_resource(dev, SYS_RES_DRQ, &ad1816->drq1_rid,
513					       0, ~0, 1, RF_ACTIVE);
514    	if (!ad1816->drq2)
515        	ad1816->drq2 = bus_alloc_resource(dev, SYS_RES_DRQ, &ad1816->drq2_rid,
516					       0, ~0, 1, RF_ACTIVE);
517
518    	if (!ad1816->io_base || !ad1816->drq1 || !ad1816->irq) ok = 0;
519
520	if (ok) {
521		pdma = rman_get_start(ad1816->drq1);
522		isa_dma_acquire(pdma);
523		isa_dmainit(pdma, DSP_BUFFSIZE);
524		if (ad1816->drq2) {
525			rdma = rman_get_start(ad1816->drq2);
526			isa_dma_acquire(rdma);
527			isa_dmainit(rdma, DSP_BUFFSIZE);
528		} else rdma = pdma;
529    		if (pdma == rdma)
530			pcm_setflags(dev, pcm_getflags(dev) | SD_F_SIMPLEX);
531	}
532    	return ok;
533}
534
535static int
536ad1816_init(struct ad1816_info *ad1816, device_t dev)
537{
538    	ad1816_write(ad1816, 1, 0x2);	/* disable interrupts */
539    	ad1816_write(ad1816, 32, 0x90F0);	/* SoundSys Mode, split fmt */
540
541    	ad1816_write(ad1816, 5, 0x8080);	/* FM volume mute */
542    	ad1816_write(ad1816, 6, 0x8080);	/* I2S1 volume mute */
543    	ad1816_write(ad1816, 7, 0x8080);	/* I2S0 volume mute */
544    	ad1816_write(ad1816, 17, 0x8888);	/* VID Volume mute */
545    	ad1816_write(ad1816, 20, 0x5050);	/* recsrc mic, agc off */
546    	/* adc gain is set to 0 */
547
548	return 0;
549}
550
551static int
552ad1816_probe(device_t dev)
553{
554    	char *s = NULL;
555    	u_int32_t logical_id = isa_get_logicalid(dev);
556
557    	switch (logical_id) {
558    	case 0x80719304: /* ADS7180 */
559 		s = "AD1816";
560 		break;
561    	}
562
563    	if (s) {
564		device_set_desc(dev, s);
565		return 0;
566    	}
567    	return ENXIO;
568}
569
570static int
571ad1816_attach(device_t dev)
572{
573	struct ad1816_info *ad1816;
574    	char status[SND_STATUSLEN];
575
576	ad1816 = (struct ad1816_info *)malloc(sizeof *ad1816, M_DEVBUF, M_NOWAIT);
577	if (!ad1816) return ENXIO;
578	bzero(ad1816, sizeof *ad1816);
579
580	ad1816->io_rid = 2;
581	ad1816->irq_rid = 0;
582	ad1816->drq1_rid = 0;
583	ad1816->drq2_rid = 1;
584
585    	if (!ad1816_alloc_resources(ad1816, dev)) goto no;
586    	ad1816_init(ad1816, dev);
587    	if (mixer_init(dev, &ad1816mixer_class, ad1816)) goto no;
588
589	bus_setup_intr(dev, ad1816->irq, INTR_TYPE_TTY, ad1816_intr, ad1816, &ad1816->ih);
590    	if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0,
591			/*lowaddr*/BUS_SPACE_MAXADDR_24BIT,
592			/*highaddr*/BUS_SPACE_MAXADDR,
593			/*filter*/NULL, /*filterarg*/NULL,
594			/*maxsize*/DSP_BUFFSIZE, /*nsegments*/1,
595			/*maxsegz*/0x3ffff,
596			/*flags*/0, &ad1816->parent_dmat) != 0) {
597		device_printf(dev, "unable to create dma tag\n");
598		goto no;
599    	}
600    	snprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld drq %ld",
601    	     	rman_get_start(ad1816->io_base),
602		rman_get_start(ad1816->irq),
603		rman_get_start(ad1816->drq1));
604    	if (ad1816->drq2) snprintf(status + strlen(status),
605        	SND_STATUSLEN - strlen(status), ":%ld",
606		rman_get_start(ad1816->drq2));
607
608    	if (pcm_register(dev, ad1816, 1, 1)) goto no;
609    	pcm_addchan(dev, PCMDIR_REC, &ad1816chan_class, ad1816);
610    	pcm_addchan(dev, PCMDIR_PLAY, &ad1816chan_class, ad1816);
611    	pcm_setstatus(dev, status);
612
613    	return 0;
614no:
615    	ad1816_release_resources(ad1816, dev);
616    	return ENXIO;
617
618}
619
620static int
621ad1816_detach(device_t dev)
622{
623	int r;
624	struct ad1816_info *ad1816;
625
626	r = pcm_unregister(dev);
627	if (r)
628		return r;
629
630	ad1816 = pcm_getdevinfo(dev);
631    	ad1816_release_resources(ad1816, dev);
632	return 0;
633}
634
635static device_method_t ad1816_methods[] = {
636	/* Device interface */
637	DEVMETHOD(device_probe,		ad1816_probe),
638	DEVMETHOD(device_attach,	ad1816_attach),
639	DEVMETHOD(device_detach,	ad1816_detach),
640
641	{ 0, 0 }
642};
643
644static driver_t ad1816_driver = {
645	"pcm",
646	ad1816_methods,
647	sizeof(snddev_info),
648};
649
650DRIVER_MODULE(snd_ad1816, isa, ad1816_driver, pcm_devclass, 0, 0);
651MODULE_DEPEND(snd_ad1816, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
652MODULE_VERSION(snd_ad1816, 1);
653
654
655