sb8.c revision 84111 
1/*
2 * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
3 * Copyright 1997,1998 Luigi Rizzo.
4 *
5 * Derived from files in the Voxware 3.5 distribution,
6 * Copyright by Hannu Savolainen 1994, under the same copyright
7 * conditions.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <dev/sound/pcm/sound.h>
33
34#include  <dev/sound/isa/sb.h>
35#include  <dev/sound/chip.h>
36
37#include "mixer_if.h"
38
39SND_DECLARE_FILE("$FreeBSD: head/sys/dev/sound/isa/sb8.c 84111 2001-09-29 07:57:07Z cg $");
40
41#define SB_DEFAULT_BUFSZ	4096
42
43static u_int32_t sb_fmt[] = {
44	AFMT_U8,
45	0
46};
47static struct pcmchan_caps sb200_playcaps = {4000, 23000, sb_fmt, 0};
48static struct pcmchan_caps sb200_reccaps = {4000, 13000, sb_fmt, 0};
49static struct pcmchan_caps sb201_playcaps = {4000, 44100, sb_fmt, 0};
50static struct pcmchan_caps sb201_reccaps = {4000, 15000, sb_fmt, 0};
51
52static u_int32_t sbpro_fmt[] = {
53	AFMT_U8,
54	AFMT_STEREO | AFMT_U8,
55	0
56};
57static struct pcmchan_caps sbpro_playcaps = {4000, 44100, sbpro_fmt, 0};
58static struct pcmchan_caps sbpro_reccaps = {4000, 44100, sbpro_fmt, 0};
59
60struct sb_info;
61
62struct sb_chinfo {
63	struct sb_info *parent;
64	struct pcm_channel *channel;
65	struct snd_dbuf *buffer;
66	int dir;
67	u_int32_t fmt, spd, blksz;
68};
69
70struct sb_info {
71	device_t parent_dev;
72    	struct resource *io_base;	/* I/O address for the board */
73    	struct resource *irq;
74   	struct resource *drq;
75    	void *ih;
76    	bus_dma_tag_t parent_dmat;
77
78	unsigned int bufsize;
79    	int bd_id;
80    	u_long bd_flags;       /* board-specific flags */
81    	struct sb_chinfo pch, rch;
82};
83
84static int sb_rd(struct sb_info *sb, int reg);
85static void sb_wr(struct sb_info *sb, int reg, u_int8_t val);
86static int sb_dspready(struct sb_info *sb);
87static int sb_cmd(struct sb_info *sb, u_char val);
88static int sb_cmd1(struct sb_info *sb, u_char cmd, int val);
89static int sb_cmd2(struct sb_info *sb, u_char cmd, int val);
90static u_int sb_get_byte(struct sb_info *sb);
91static void sb_setmixer(struct sb_info *sb, u_int port, u_int value);
92static int sb_getmixer(struct sb_info *sb, u_int port);
93static int sb_reset_dsp(struct sb_info *sb);
94
95static void sb_intr(void *arg);
96static int sb_speed(struct sb_chinfo *ch);
97static int sb_start(struct sb_chinfo *ch);
98static int sb_stop(struct sb_chinfo *ch);
99
100/*
101 * Common code for the midi and pcm functions
102 *
103 * sb_cmd write a single byte to the CMD port.
104 * sb_cmd1 write a CMD + 1 byte arg
105 * sb_cmd2 write a CMD + 2 byte arg
106 * sb_get_byte returns a single byte from the DSP data port
107 */
108
109static void
110sb_lock(struct sb_info *sb) {
111
112	sbc_lock(device_get_softc(sb->parent_dev));
113}
114
115static void
116sb_unlock(struct sb_info *sb) {
117
118	sbc_unlock(device_get_softc(sb->parent_dev));
119}
120
121static int
122port_rd(struct resource *port, int off)
123{
124	return bus_space_read_1(rman_get_bustag(port), rman_get_bushandle(port), off);
125}
126
127static void
128port_wr(struct resource *port, int off, u_int8_t data)
129{
130	return bus_space_write_1(rman_get_bustag(port), rman_get_bushandle(port), off, data);
131}
132
133static int
134sb_rd(struct sb_info *sb, int reg)
135{
136	return port_rd(sb->io_base, reg);
137}
138
139static void
140sb_wr(struct sb_info *sb, int reg, u_int8_t val)
141{
142	port_wr(sb->io_base, reg, val);
143}
144
145static int
146sb_dspready(struct sb_info *sb)
147{
148	return ((sb_rd(sb, SBDSP_STATUS) & 0x80) == 0);
149}
150
151static int
152sb_dspwr(struct sb_info *sb, u_char val)
153{
154    	int  i;
155
156    	for (i = 0; i < 1000; i++) {
157		if (sb_dspready(sb)) {
158	    		sb_wr(sb, SBDSP_CMD, val);
159	    		return 1;
160		}
161		if (i > 10) DELAY((i > 100)? 1000 : 10);
162    	}
163    	printf("sb_dspwr(0x%02x) timed out.\n", val);
164    	return 0;
165}
166
167static int
168sb_cmd(struct sb_info *sb, u_char val)
169{
170#if 0
171	printf("sb_cmd: %x\n", val);
172#endif
173    	return sb_dspwr(sb, val);
174}
175
176static int
177sb_cmd1(struct sb_info *sb, u_char cmd, int val)
178{
179#if 0
180    	printf("sb_cmd1: %x, %x\n", cmd, val);
181#endif
182    	if (sb_dspwr(sb, cmd)) {
183		return sb_dspwr(sb, val & 0xff);
184    	} else return 0;
185}
186
187static int
188sb_cmd2(struct sb_info *sb, u_char cmd, int val)
189{
190#if 0
191    	printf("sb_cmd2: %x, %x\n", cmd, val);
192#endif
193    	if (sb_dspwr(sb, cmd)) {
194		return sb_dspwr(sb, val & 0xff) &&
195		       sb_dspwr(sb, (val >> 8) & 0xff);
196    	} else return 0;
197}
198
199/*
200 * in the SB, there is a set of indirect "mixer" registers with
201 * address at offset 4, data at offset 5
202 *
203 * we don't need to interlock these, the mixer lock will suffice.
204 */
205static void
206sb_setmixer(struct sb_info *sb, u_int port, u_int value)
207{
208    	sb_wr(sb, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
209    	DELAY(10);
210    	sb_wr(sb, SB_MIX_DATA, (u_char) (value & 0xff));
211    	DELAY(10);
212}
213
214static int
215sb_getmixer(struct sb_info *sb, u_int port)
216{
217    	int val;
218
219    	sb_wr(sb, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
220    	DELAY(10);
221    	val = sb_rd(sb, SB_MIX_DATA);
222    	DELAY(10);
223
224    	return val;
225}
226
227static u_int
228sb_get_byte(struct sb_info *sb)
229{
230    	int i;
231
232    	for (i = 1000; i > 0; i--) {
233		if (sb_rd(sb, DSP_DATA_AVAIL) & 0x80)
234			return sb_rd(sb, DSP_READ);
235		else
236			DELAY(20);
237    	}
238    	return 0xffff;
239}
240
241static int
242sb_reset_dsp(struct sb_info *sb)
243{
244    	sb_wr(sb, SBDSP_RST, 3);
245    	DELAY(100);
246    	sb_wr(sb, SBDSP_RST, 0);
247    	if (sb_get_byte(sb) != 0xAA) {
248        	DEB(printf("sb_reset_dsp 0x%lx failed\n",
249			   rman_get_start(d->io_base)));
250		return ENXIO;	/* Sorry */
251    	}
252    	return 0;
253}
254
255static void
256sb_release_resources(struct sb_info *sb, device_t dev)
257{
258    	if (sb->irq) {
259    		if (sb->ih)
260			bus_teardown_intr(dev, sb->irq, sb->ih);
261 		bus_release_resource(dev, SYS_RES_IRQ, 0, sb->irq);
262		sb->irq = 0;
263    	}
264    	if (sb->drq) {
265		isa_dma_release(rman_get_start(sb->drq));
266		bus_release_resource(dev, SYS_RES_DRQ, 0, sb->drq);
267		sb->drq = 0;
268    	}
269    	if (sb->io_base) {
270		bus_release_resource(dev, SYS_RES_IOPORT, 0, sb->io_base);
271		sb->io_base = 0;
272    	}
273    	if (sb->parent_dmat) {
274		bus_dma_tag_destroy(sb->parent_dmat);
275		sb->parent_dmat = 0;
276    	}
277     	free(sb, M_DEVBUF);
278}
279
280static int
281sb_alloc_resources(struct sb_info *sb, device_t dev)
282{
283	int rid;
284
285	rid = 0;
286	if (!sb->io_base)
287    		sb->io_base = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE);
288	rid = 0;
289	if (!sb->irq)
290    		sb->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, RF_ACTIVE);
291	rid = 0;
292	if (!sb->drq)
293    		sb->drq = bus_alloc_resource(dev, SYS_RES_DRQ, &rid, 0, ~0, 1, RF_ACTIVE);
294
295	if (sb->io_base && sb->drq && sb->irq) {
296		isa_dma_acquire(rman_get_start(sb->drq));
297		isa_dmainit(rman_get_start(sb->drq), sb->bufsize);
298
299		return 0;
300	} else return ENXIO;
301}
302
303/************************************************************/
304
305static int
306sbpromix_init(struct snd_mixer *m)
307{
308    	struct sb_info *sb = mix_getdevinfo(m);
309
310	mix_setdevs(m, SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_LINE |
311		       SOUND_MASK_MIC | SOUND_MASK_CD | SOUND_MASK_VOLUME);
312
313	mix_setrecdevs(m, SOUND_MASK_LINE | SOUND_MASK_MIC | SOUND_MASK_CD);
314
315	sb_setmixer(sb, 0, 1); /* reset mixer */
316
317    	return 0;
318}
319
320static int
321sbpromix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
322{
323    	struct sb_info *sb = mix_getdevinfo(m);
324    	int reg, max;
325    	u_char val;
326
327	max = 7;
328	switch (dev) {
329	case SOUND_MASK_PCM:
330		reg = 0x04;
331		break;
332
333	case SOUND_MASK_MIC:
334		reg = 0x0a;
335		max = 3;
336		break;
337
338	case SOUND_MASK_VOLUME:
339		reg = 0x22;
340		break;
341
342	case SOUND_MASK_SYNTH:
343		reg = 0x26;
344		break;
345
346	case SOUND_MASK_CD:
347		reg = 0x28;
348		break;
349
350	case SOUND_MASK_LINE:
351		reg = 0x2e;
352		break;
353
354	default:
355		return -1;
356	}
357
358	left = (left * max) / 100;
359	right = (dev == SOUND_MIXER_MIC)? left : ((right * max) / 100);
360
361	val = (dev == SOUND_MIXER_MIC)? (left << 1) : (left << 5 | right << 1);
362	sb_setmixer(sb, reg, val);
363
364	left = (left * 100) / max;
365	right = (right * 100) / max;
366
367    	return left | (right << 8);
368}
369
370static int
371sbpromix_setrecsrc(struct snd_mixer *m, u_int32_t src)
372{
373    	struct sb_info *sb = mix_getdevinfo(m);
374    	u_char recdev;
375
376	if      (src == SOUND_MASK_LINE)
377		recdev = 0x06;
378	else if (src == SOUND_MASK_CD)
379		recdev = 0x02;
380	else { /* default: mic */
381	    	src = SOUND_MASK_MIC;
382	    	recdev = 0;
383	}
384	sb_setmixer(sb, RECORD_SRC, recdev | (sb_getmixer(sb, RECORD_SRC) & ~0x07));
385
386	return src;
387}
388
389static kobj_method_t sbpromix_mixer_methods[] = {
390    	KOBJMETHOD(mixer_init,		sbpromix_init),
391    	KOBJMETHOD(mixer_set,		sbpromix_set),
392    	KOBJMETHOD(mixer_setrecsrc,	sbpromix_setrecsrc),
393	{ 0, 0 }
394};
395MIXER_DECLARE(sbpromix_mixer);
396
397/************************************************************/
398
399static int
400sbmix_init(struct snd_mixer *m)
401{
402    	struct sb_info *sb = mix_getdevinfo(m);
403
404	mix_setdevs(m, SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_CD | SOUND_MASK_VOLUME);
405
406	mix_setrecdevs(m, 0);
407
408	sb_setmixer(sb, 0, 1); /* reset mixer */
409
410    	return 0;
411}
412
413static int
414sbmix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
415{
416    	struct sb_info *sb = mix_getdevinfo(m);
417    	int reg, max;
418
419	max = 7;
420	switch (dev) {
421	case SOUND_MASK_VOLUME:
422		reg = 0x2;
423		break;
424
425	case SOUND_MASK_SYNTH:
426		reg = 0x6;
427		break;
428
429	case SOUND_MASK_CD:
430		reg = 0x8;
431		break;
432
433	case SOUND_MASK_PCM:
434		reg = 0x0a;
435		max = 3;
436		break;
437
438	default:
439		return -1;
440	}
441
442	left = (left * max) / 100;
443
444	sb_setmixer(sb, reg, left << 1);
445
446	left = (left * 100) / max;
447
448    	return left | (left << 8);
449}
450
451static int
452sbmix_setrecsrc(struct snd_mixer *m, u_int32_t src)
453{
454	return 0;
455}
456
457static kobj_method_t sbmix_mixer_methods[] = {
458    	KOBJMETHOD(mixer_init,		sbmix_init),
459    	KOBJMETHOD(mixer_set,		sbmix_set),
460    	KOBJMETHOD(mixer_setrecsrc,	sbmix_setrecsrc),
461	{ 0, 0 }
462};
463MIXER_DECLARE(sbmix_mixer);
464
465/************************************************************/
466
467static void
468sb_intr(void *arg)
469{
470    	struct sb_info *sb = (struct sb_info *)arg;
471
472	sb_lock(sb);
473    	if (sndbuf_runsz(sb->pch.buffer) > 0)
474		chn_intr(sb->pch.channel);
475
476    	if (sndbuf_runsz(sb->rch.buffer) > 0)
477		chn_intr(sb->rch.channel);
478
479	sb_rd(sb, DSP_DATA_AVAIL); /* int ack */
480	sb_unlock(sb);
481}
482
483static int
484sb_speed(struct sb_chinfo *ch)
485{
486	struct sb_info *sb = ch->parent;
487    	int play = (ch->dir == PCMDIR_PLAY)? 1 : 0;
488	int stereo = (ch->fmt & AFMT_STEREO)? 1 : 0;
489	int speed, tmp, thresh, max;
490	u_char tconst;
491
492	if (sb->bd_id >= 0x300) {
493		thresh = stereo? 11025 : 23000;
494		max = stereo? 22050 : 44100;
495	} else if (sb->bd_id > 0x200) {
496		thresh = play? 23000 : 13000;
497		max = play? 44100 : 15000;
498	} else {
499		thresh = 999999;
500		max = play? 23000 : 13000;
501	}
502
503	speed = ch->spd;
504	if (speed > max)
505		speed = max;
506
507	sb_lock(sb);
508	sb->bd_flags &= ~BD_F_HISPEED;
509	if (speed > thresh)
510		sb->bd_flags |= BD_F_HISPEED;
511
512	tmp = 65536 - (256000000 / (speed << stereo));
513	tconst = tmp >> 8;
514
515	sb_cmd1(sb, 0x40, tconst); /* set time constant */
516
517	speed = (256000000 / (65536 - tmp)) >> stereo;
518
519	ch->spd = speed;
520	sb_unlock(sb);
521	return speed;
522}
523
524static int
525sb_start(struct sb_chinfo *ch)
526{
527	struct sb_info *sb = ch->parent;
528    	int play = (ch->dir == PCMDIR_PLAY)? 1 : 0;
529    	int stereo = (ch->fmt & AFMT_STEREO)? 1 : 0;
530	int l = ch->blksz;
531	u_char i;
532
533	l--;
534
535	sb_lock(sb);
536	if (play)
537		sb_cmd(sb, DSP_CMD_SPKON);
538
539	if (sb->bd_flags & BD_F_HISPEED)
540		i = play? 0x90 : 0x98;
541	else
542		i = play? 0x1c : 0x2c;
543
544	sb_setmixer(sb, 0x0e, stereo? 2 : 0);
545	sb_cmd2(sb, 0x48, l);
546       	sb_cmd(sb, i);
547
548	sb->bd_flags |= BD_F_DMARUN;
549	sb_unlock(sb);
550	return 0;
551}
552
553static int
554sb_stop(struct sb_chinfo *ch)
555{
556	struct sb_info *sb = ch->parent;
557    	int play = (ch->dir == PCMDIR_PLAY)? 1 : 0;
558
559	sb_lock(sb);
560    	if (sb->bd_flags & BD_F_HISPEED)
561		sb_reset_dsp(sb);
562	else
563		sb_cmd(sb, DSP_CMD_DMAEXIT_8);
564
565	if (play)
566		sb_cmd(sb, DSP_CMD_SPKOFF); /* speaker off */
567	sb_unlock(sb);
568	sb->bd_flags &= ~BD_F_DMARUN;
569	return 0;
570}
571
572/* channel interface */
573static void *
574sbchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
575{
576	struct sb_info *sb = devinfo;
577	struct sb_chinfo *ch = (dir == PCMDIR_PLAY)? &sb->pch : &sb->rch;
578
579	ch->parent = sb;
580	ch->channel = c;
581	ch->dir = dir;
582	ch->buffer = b;
583	if (sndbuf_alloc(ch->buffer, sb->parent_dmat, sb->bufsize) == -1)
584		return NULL;
585	sndbuf_isadmasetup(ch->buffer, sb->drq);
586	return ch;
587}
588
589static int
590sbchan_setformat(kobj_t obj, void *data, u_int32_t format)
591{
592	struct sb_chinfo *ch = data;
593
594	ch->fmt = format;
595	return 0;
596}
597
598static int
599sbchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
600{
601	struct sb_chinfo *ch = data;
602
603	ch->spd = speed;
604	return sb_speed(ch);
605}
606
607static int
608sbchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
609{
610	struct sb_chinfo *ch = data;
611
612	ch->blksz = blocksize;
613	return ch->blksz;
614}
615
616static int
617sbchan_trigger(kobj_t obj, void *data, int go)
618{
619	struct sb_chinfo *ch = data;
620
621	if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
622		return 0;
623
624	sndbuf_isadma(ch->buffer, go);
625	if (go == PCMTRIG_START)
626		sb_start(ch);
627	else
628		sb_stop(ch);
629	return 0;
630}
631
632static int
633sbchan_getptr(kobj_t obj, void *data)
634{
635	struct sb_chinfo *ch = data;
636
637	return sndbuf_isadmaptr(ch->buffer);
638}
639
640static struct pcmchan_caps *
641sbchan_getcaps(kobj_t obj, void *data)
642{
643	struct sb_chinfo *ch = data;
644	int p = (ch->dir == PCMDIR_PLAY)? 1 : 0;
645
646	if (ch->parent->bd_id == 0x200)
647		return p? &sb200_playcaps : &sb200_reccaps;
648	if (ch->parent->bd_id < 0x300)
649		return p? &sb201_playcaps : &sb201_reccaps;
650	return p? &sbpro_playcaps : &sbpro_reccaps;
651}
652
653static kobj_method_t sbchan_methods[] = {
654    	KOBJMETHOD(channel_init,		sbchan_init),
655    	KOBJMETHOD(channel_setformat,		sbchan_setformat),
656    	KOBJMETHOD(channel_setspeed,		sbchan_setspeed),
657    	KOBJMETHOD(channel_setblocksize,	sbchan_setblocksize),
658    	KOBJMETHOD(channel_trigger,		sbchan_trigger),
659    	KOBJMETHOD(channel_getptr,		sbchan_getptr),
660    	KOBJMETHOD(channel_getcaps,		sbchan_getcaps),
661	{ 0, 0 }
662};
663CHANNEL_DECLARE(sbchan);
664
665/************************************************************/
666
667static int
668sb_probe(device_t dev)
669{
670    	char buf[64];
671	uintptr_t func, ver, r, f;
672
673	/* The parent device has already been probed. */
674	r = BUS_READ_IVAR(device_get_parent(dev), dev, 0, &func);
675	if (func != SCF_PCM)
676		return (ENXIO);
677
678	r = BUS_READ_IVAR(device_get_parent(dev), dev, 1, &ver);
679	f = (ver & 0xffff0000) >> 16;
680	ver &= 0x0000ffff;
681	if ((f & BD_F_ESS) || (ver >= 0x400))
682		return (ENXIO);
683
684	snprintf(buf, sizeof buf, "SB DSP %d.%02d", (int) ver >> 8, (int) ver & 0xff);
685
686    	device_set_desc_copy(dev, buf);
687
688	return 0;
689}
690
691static int
692sb_attach(device_t dev)
693{
694    	struct sb_info *sb;
695    	char status[SND_STATUSLEN];
696	uintptr_t ver;
697
698    	sb = (struct sb_info *)malloc(sizeof *sb, M_DEVBUF, M_NOWAIT | M_ZERO);
699    	if (!sb)
700		return ENXIO;
701
702	sb->parent_dev = device_get_parent(dev);
703	BUS_READ_IVAR(device_get_parent(dev), dev, 1, &ver);
704	sb->bd_id = ver & 0x0000ffff;
705	sb->bd_flags = (ver & 0xffff0000) >> 16;
706	sb->bufsize = pcm_getbuffersize(dev, 4096, SB_DEFAULT_BUFSZ, 65536);
707
708    	if (sb_alloc_resources(sb, dev))
709		goto no;
710    	if (sb_reset_dsp(sb))
711		goto no;
712    	if (mixer_init(dev, (sb->bd_id < 0x300)? &sbmix_mixer_class : &sbpromix_mixer_class, sb))
713		goto no;
714	if (snd_setup_intr(dev, sb->irq, INTR_MPSAFE, sb_intr, sb, &sb->ih))
715		goto no;
716
717	pcm_setflags(dev, pcm_getflags(dev) | SD_F_SIMPLEX);
718
719    	if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0,
720			/*lowaddr*/BUS_SPACE_MAXADDR_24BIT,
721			/*highaddr*/BUS_SPACE_MAXADDR,
722			/*filter*/NULL, /*filterarg*/NULL,
723			/*maxsize*/sb->bufsize, /*nsegments*/1,
724			/*maxsegz*/0x3ffff,
725			/*flags*/0, &sb->parent_dmat) != 0) {
726		device_printf(dev, "unable to create dma tag\n");
727		goto no;
728    	}
729
730    	snprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld drq %ld bufsz %u",
731    	     	rman_get_start(sb->io_base), rman_get_start(sb->irq), rman_get_start(sb->drq), sb->bufsize);
732
733    	if (pcm_register(dev, sb, 1, 1))
734		goto no;
735	pcm_addchan(dev, PCMDIR_REC, &sbchan_class, sb);
736	pcm_addchan(dev, PCMDIR_PLAY, &sbchan_class, sb);
737
738    	pcm_setstatus(dev, status);
739
740    	return 0;
741
742no:
743    	sb_release_resources(sb, dev);
744    	return ENXIO;
745}
746
747static int
748sb_detach(device_t dev)
749{
750	int r;
751	struct sb_info *sb;
752
753	r = pcm_unregister(dev);
754	if (r)
755		return r;
756
757	sb = pcm_getdevinfo(dev);
758    	sb_release_resources(sb, dev);
759	return 0;
760}
761
762static device_method_t sb_methods[] = {
763	/* Device interface */
764	DEVMETHOD(device_probe,		sb_probe),
765	DEVMETHOD(device_attach,	sb_attach),
766	DEVMETHOD(device_detach,	sb_detach),
767
768	{ 0, 0 }
769};
770
771static driver_t sb_driver = {
772	"pcm",
773	sb_methods,
774	PCM_SOFTC_SIZE,
775};
776
777DRIVER_MODULE(snd_sb8, sbc, sb_driver, pcm_devclass, 0, 0);
778MODULE_DEPEND(snd_sb8, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
779MODULE_DEPEND(snd_sb8, snd_sbc, 1, 1, 1);
780MODULE_VERSION(snd_sb8, 1);
781
782
783
784
785