pad.c revision 1.58.2.3 1 /* $NetBSD: pad.c,v 1.58.2.3 2019/05/05 02:01:34 isaki Exp $ */
2
3 /*-
4 * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca>
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: pad.c,v 1.58.2.3 2019/05/05 02:01:34 isaki Exp $");
31
32 #include <sys/types.h>
33 #include <sys/param.h>
34 #include <sys/conf.h>
35 #include <sys/buf.h>
36 #include <sys/kmem.h>
37 #include <sys/kernel.h>
38 #include <sys/device.h>
39 #include <sys/proc.h>
40 #include <sys/condvar.h>
41 #include <sys/select.h>
42 #include <sys/audioio.h>
43 #include <sys/vnode.h>
44 #include <sys/module.h>
45 #include <sys/atomic.h>
46 #include <sys/time.h>
47
48 #include <dev/audio/audio_if.h>
49 #include <dev/audio/audiovar.h>
50
51 #include <dev/pad/padvar.h>
52
53 /* #define PAD_DEBUG */
54 #ifdef PAD_DEBUG
55 #define DPRINTF(fmt...) printf(fmt)
56 #else
57 #define DPRINTF(fmt...) /**/
58 #endif
59
60 #define PADUNIT(x) minor(x)
61
62 #define PADFREQ 44100
63 #define PADCHAN 2
64 #define PADPREC 16
65
66 extern struct cfdriver pad_cd;
67
68 typedef struct pad_block {
69 uint8_t *pb_ptr;
70 int pb_len;
71 } pad_block_t;
72
73 enum {
74 PAD_OUTPUT_CLASS,
75 PAD_INPUT_CLASS,
76 PAD_OUTPUT_MASTER_VOLUME,
77 PAD_INPUT_DAC_VOLUME,
78 PAD_ENUM_LAST,
79 };
80
81 static int pad_match(device_t, cfdata_t, void *);
82 static void pad_attach(device_t, device_t, void *);
83 static int pad_detach(device_t, int);
84 static void pad_childdet(device_t, device_t);
85
86 static int pad_query_format(void *, audio_format_query_t *);
87 static int pad_set_format(void *, int,
88 const audio_params_t *, const audio_params_t *,
89 audio_filter_reg_t *, audio_filter_reg_t *);
90 static int pad_start_output(void *, void *, int,
91 void (*)(void *), void *);
92 static int pad_start_input(void *, void *, int,
93 void (*)(void *), void *);
94 static int pad_halt_output(void *);
95 static int pad_halt_input(void *);
96 static int pad_getdev(void *, struct audio_device *);
97 static int pad_set_port(void *, mixer_ctrl_t *);
98 static int pad_get_port(void *, mixer_ctrl_t *);
99 static int pad_query_devinfo(void *, mixer_devinfo_t *);
100 static int pad_get_props(void *);
101 static void pad_get_locks(void *, kmutex_t **, kmutex_t **);
102
103 static void pad_done_output(void *);
104 static void pad_swvol_codec(audio_filter_arg_t *);
105
106 static bool pad_is_attached; /* Do we have an audio* child? */
107
108 static const struct audio_hw_if pad_hw_if = {
109 .query_format = pad_query_format,
110 .set_format = pad_set_format,
111 .start_output = pad_start_output,
112 .start_input = pad_start_input,
113 .halt_output = pad_halt_output,
114 .halt_input = pad_halt_input,
115 .getdev = pad_getdev,
116 .set_port = pad_set_port,
117 .get_port = pad_get_port,
118 .query_devinfo = pad_query_devinfo,
119 .get_props = pad_get_props,
120 .get_locks = pad_get_locks,
121 };
122
123 #define PAD_NFORMATS 1
124 #if defined(PAD_SUPPORT_RECORD)
125 #define PADMODE (AUMODE_PLAY | AUMODE_RECORD)
126 #else
127 #define PADMODE AUMODE_PLAY
128 #endif
129 static const struct audio_format pad_formats[PAD_NFORMATS] = {
130 {
131 .mode = PADMODE,
132 .encoding = AUDIO_ENCODING_SLINEAR_NE,
133 .validbits = PADPREC,
134 .precision = PADPREC,
135 .channels = PADCHAN,
136 .channel_mask = AUFMT_STEREO,
137 .frequency_type = 1,
138 .frequency = { PADFREQ },
139 },
140 };
141
142 extern void padattach(int);
143
144 static int pad_add_block(pad_softc_t *, uint8_t *, int);
145 static int pad_get_block(pad_softc_t *, pad_block_t *, int);
146
147 dev_type_open(pad_dev_open);
148 dev_type_close(pad_dev_close);
149 dev_type_read(pad_dev_read);
150
151 const struct cdevsw pad_cdevsw = {
152 .d_open = pad_dev_open,
153 .d_close = pad_dev_close,
154 .d_read = pad_dev_read,
155 .d_write = nowrite,
156 .d_ioctl = noioctl,
157 .d_stop = nostop,
158 .d_tty = notty,
159 .d_poll = nopoll,
160 .d_mmap = nommap,
161 .d_kqfilter = nokqfilter,
162 .d_discard = nodiscard,
163 .d_flag = D_OTHER | D_MPSAFE,
164 };
165
166 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach,
167 NULL, NULL, pad_childdet);
168
169 void
170 padattach(int n)
171 {
172 int i, err;
173 cfdata_t cf;
174
175 aprint_debug("pad: requested %d units\n", n);
176 DPRINTF("%s: requested %d units\n", __func__, n);
177
178 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca);
179 if (err) {
180 aprint_error("%s: couldn't register cfattach: %d\n",
181 pad_cd.cd_name, err);
182 config_cfdriver_detach(&pad_cd);
183 return;
184 }
185
186 for (i = 0; i < n; i++) {
187 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP);
188 cf->cf_name = pad_cd.cd_name;
189 cf->cf_atname = pad_cd.cd_name;
190 cf->cf_unit = i;
191 cf->cf_fstate = FSTATE_STAR;
192
193 (void)config_attach_pseudo(cf);
194 }
195
196 return;
197 }
198
199 static int
200 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize)
201 {
202 int l;
203
204 if (sc->sc_buflen + blksize > PAD_BUFSIZE)
205 return ENOBUFS;
206
207 if (sc->sc_wpos + blksize <= PAD_BUFSIZE)
208 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize);
209 else {
210 l = PAD_BUFSIZE - sc->sc_wpos;
211 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l);
212 memcpy(sc->sc_audiobuf, blk + l, blksize - l);
213 }
214
215 sc->sc_wpos += blksize;
216 if (sc->sc_wpos >= PAD_BUFSIZE)
217 sc->sc_wpos -= PAD_BUFSIZE;
218
219 sc->sc_buflen += blksize;
220
221 return 0;
222 }
223
224 static int
225 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize)
226 {
227 int l;
228
229 KASSERT(pb != NULL);
230
231 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos);
232 if (sc->sc_rpos + blksize < PAD_BUFSIZE) {
233 pb->pb_len = blksize;
234 sc->sc_rpos += blksize;
235 } else {
236 l = PAD_BUFSIZE - sc->sc_rpos;
237 pb->pb_len = l;
238 sc->sc_rpos = 0;
239 }
240 sc->sc_buflen -= pb->pb_len;
241
242 return 0;
243 }
244
245 static int
246 pad_match(device_t parent, cfdata_t data, void *opaque)
247 {
248
249 return 1;
250 }
251
252 static void
253 pad_childdet(device_t self, device_t child)
254 {
255 pad_softc_t *sc = device_private(self);
256
257 sc->sc_audiodev = NULL;
258 }
259
260 static void
261 pad_attach(device_t parent, device_t self, void *opaque)
262 {
263 pad_softc_t *sc = device_private(self);
264
265 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n");
266
267 sc->sc_dev = self;
268 sc->sc_open = 0;
269
270 cv_init(&sc->sc_condvar, device_xname(self));
271 mutex_init(&sc->sc_cond_lock, MUTEX_DEFAULT, IPL_NONE);
272 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
273 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE);
274 callout_init(&sc->sc_pcallout, 0/*XXX?*/);
275
276 sc->sc_swvol = 255;
277 sc->sc_buflen = 0;
278 sc->sc_rpos = sc->sc_wpos = 0;
279 sc->sc_audiodev = audio_attach_mi(&pad_hw_if, sc, sc->sc_dev);
280
281 if (!pmf_device_register(self, NULL, NULL))
282 aprint_error_dev(self, "couldn't establish power handler\n");
283
284 pad_is_attached = true;
285 return;
286 }
287
288 static int
289 pad_detach(device_t self, int flags)
290 {
291 pad_softc_t *sc = device_private(self);
292 int cmaj, mn, rc;
293
294 if (!pad_is_attached)
295 return ENXIO;
296
297 cmaj = cdevsw_lookup_major(&pad_cdevsw);
298 mn = device_unit(self);
299 vdevgone(cmaj, mn, mn, VCHR);
300
301 if ((rc = config_detach_children(self, flags)) != 0)
302 return rc;
303
304 pmf_device_deregister(self);
305
306 mutex_destroy(&sc->sc_lock);
307 mutex_destroy(&sc->sc_intr_lock);
308 cv_destroy(&sc->sc_condvar);
309 callout_destroy(&sc->sc_pcallout);
310
311 pad_is_attached = false;
312 return 0;
313 }
314
315 int
316 pad_dev_open(dev_t dev, int flags, int fmt, struct lwp *l)
317 {
318 pad_softc_t *sc;
319
320 sc = device_lookup_private(&pad_cd, PADUNIT(dev));
321 if (sc == NULL)
322 return ENXIO;
323
324 if (atomic_swap_uint(&sc->sc_open, 1) != 0)
325 return EBUSY;
326
327 DPRINTF("%s -> %d\n", __func__, sc->sc_open);
328
329 return 0;
330 }
331
332 int
333 pad_dev_close(dev_t dev, int flags, int fmt, struct lwp *l)
334 {
335 pad_softc_t *sc;
336
337 sc = device_lookup_private(&pad_cd, PADUNIT(dev));
338 if (sc == NULL)
339 return ENXIO;
340
341 KASSERT(sc->sc_open > 0);
342 /* XXX should this be atomic too? */
343 sc->sc_open = 0;
344 DPRINTF("%s -> %d\n", __func__, sc->sc_open);
345
346 return 0;
347 }
348
349 int
350 pad_dev_read(dev_t dev, struct uio *uio, int flags)
351 {
352 pad_softc_t *sc;
353 pad_block_t pb;
354 int len;
355 int err;
356
357 sc = device_lookup_private(&pad_cd, PADUNIT(dev));
358 if (sc == NULL)
359 return ENXIO;
360
361 err = 0;
362 DPRINTF("%s: resid=%zu\n", __func__, uio->uio_resid);
363 while (uio->uio_resid > 0 && !err) {
364 mutex_enter(&sc->sc_cond_lock);
365 if (sc->sc_buflen == 0) {
366 DPRINTF("%s: wait\n", __func__);
367 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_cond_lock);
368 DPRINTF("%s: wake up %d\n", __func__, err);
369 mutex_exit(&sc->sc_cond_lock);
370 if (err) {
371 if (err == ERESTART)
372 err = EINTR;
373 break;
374 }
375 if (sc->sc_buflen == 0)
376 break;
377 continue;
378 }
379
380 len = uimin(uio->uio_resid, sc->sc_buflen);
381 err = pad_get_block(sc, &pb, len);
382 mutex_exit(&sc->sc_cond_lock);
383 if (err)
384 break;
385 DPRINTF("%s: move %d\n", __func__, pb.pb_len);
386 uiomove(pb.pb_ptr, pb.pb_len, uio);
387 }
388
389 return err;
390 }
391
392 static int
393 pad_query_format(void *opaque, audio_format_query_t *afp)
394 {
395
396 return audio_query_format(pad_formats, PAD_NFORMATS, afp);
397 }
398
399 static int
400 pad_set_format(void *opaque, int setmode,
401 const audio_params_t *play, const audio_params_t *rec,
402 audio_filter_reg_t *pfil, audio_filter_reg_t *rfil)
403 {
404 pad_softc_t *sc;
405
406 sc = (pad_softc_t *)opaque;
407
408 KASSERT(mutex_owned(&sc->sc_lock));
409
410 /* XXX playback only */
411 pfil->codec = pad_swvol_codec;
412 pfil->context = sc;
413
414 return 0;
415 }
416
417 static int
418 pad_start_output(void *opaque, void *block, int blksize,
419 void (*intr)(void *), void *intrarg)
420 {
421 pad_softc_t *sc;
422 int err;
423 int ms;
424
425 sc = (pad_softc_t *)opaque;
426
427 KASSERT(mutex_owned(&sc->sc_intr_lock));
428
429 sc->sc_intr = intr;
430 sc->sc_intrarg = intrarg;
431 sc->sc_blksize = blksize;
432
433 DPRINTF("%s: blksize=%d\n", __func__, blksize);
434 mutex_enter(&sc->sc_cond_lock);
435 err = pad_add_block(sc, block, blksize);
436 mutex_exit(&sc->sc_cond_lock);
437 cv_broadcast(&sc->sc_condvar);
438
439 ms = blksize * 1000 / PADCHAN / (PADPREC / NBBY) / PADFREQ;
440 DPRINTF("%s: callout ms=%d\n", __func__, ms);
441 callout_reset(&sc->sc_pcallout, mstohz(ms), pad_done_output, sc);
442
443 return err;
444 }
445
446 static int
447 pad_start_input(void *opaque, void *block, int blksize,
448 void (*intr)(void *), void *intrarg)
449 {
450 pad_softc_t *sc __diagused;
451
452 sc = (pad_softc_t *)opaque;
453
454 KASSERT(mutex_owned(&sc->sc_intr_lock));
455
456 return EOPNOTSUPP;
457 }
458
459 static int
460 pad_halt_output(void *opaque)
461 {
462 pad_softc_t *sc;
463
464 sc = (pad_softc_t *)opaque;
465
466 DPRINTF("%s\n", __func__);
467 KASSERT(mutex_owned(&sc->sc_intr_lock));
468
469 cv_broadcast(&sc->sc_condvar);
470 callout_stop(&sc->sc_pcallout);
471 sc->sc_intr = NULL;
472 sc->sc_intrarg = NULL;
473 sc->sc_buflen = 0;
474 sc->sc_rpos = sc->sc_wpos = 0;
475
476 return 0;
477 }
478
479 static int
480 pad_halt_input(void *opaque)
481 {
482 pad_softc_t *sc __diagused;
483
484 sc = (pad_softc_t *)opaque;
485
486 KASSERT(mutex_owned(&sc->sc_intr_lock));
487
488 return 0;
489 }
490
491 static void
492 pad_done_output(void *arg)
493 {
494 pad_softc_t *sc;
495
496 DPRINTF("%s\n", __func__);
497 sc = (pad_softc_t *)arg;
498 callout_stop(&sc->sc_pcallout);
499
500 mutex_enter(&sc->sc_intr_lock);
501 (*sc->sc_intr)(sc->sc_intrarg);
502 mutex_exit(&sc->sc_intr_lock);
503 }
504
505 static int
506 pad_getdev(void *opaque, struct audio_device *ret)
507 {
508 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name));
509 strlcpy(ret->version, osrelease, sizeof(ret->version));
510 strlcpy(ret->config, "pad", sizeof(ret->config));
511
512 return 0;
513 }
514
515 static int
516 pad_set_port(void *opaque, mixer_ctrl_t *mc)
517 {
518 pad_softc_t *sc;
519
520 sc = (pad_softc_t *)opaque;
521
522 KASSERT(mutex_owned(&sc->sc_lock));
523
524 switch (mc->dev) {
525 case PAD_OUTPUT_MASTER_VOLUME:
526 case PAD_INPUT_DAC_VOLUME:
527 if (mc->un.value.num_channels != 1)
528 return EINVAL;
529 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO];
530 return 0;
531 }
532
533 return ENXIO;
534 }
535
536 static int
537 pad_get_port(void *opaque, mixer_ctrl_t *mc)
538 {
539 pad_softc_t *sc;
540
541 sc = (pad_softc_t *)opaque;
542
543 KASSERT(mutex_owned(&sc->sc_lock));
544
545 switch (mc->dev) {
546 case PAD_OUTPUT_MASTER_VOLUME:
547 case PAD_INPUT_DAC_VOLUME:
548 if (mc->un.value.num_channels != 1)
549 return EINVAL;
550 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol;
551 return 0;
552 }
553
554 return ENXIO;
555 }
556
557 static int
558 pad_query_devinfo(void *opaque, mixer_devinfo_t *di)
559 {
560 pad_softc_t *sc __diagused;
561
562 sc = (pad_softc_t *)opaque;
563
564 KASSERT(mutex_owned(&sc->sc_lock));
565
566 switch (di->index) {
567 case PAD_OUTPUT_CLASS:
568 di->mixer_class = PAD_OUTPUT_CLASS;
569 strcpy(di->label.name, AudioCoutputs);
570 di->type = AUDIO_MIXER_CLASS;
571 di->next = di->prev = AUDIO_MIXER_LAST;
572 return 0;
573 case PAD_INPUT_CLASS:
574 di->mixer_class = PAD_INPUT_CLASS;
575 strcpy(di->label.name, AudioCinputs);
576 di->type = AUDIO_MIXER_CLASS;
577 di->next = di->prev = AUDIO_MIXER_LAST;
578 return 0;
579 case PAD_OUTPUT_MASTER_VOLUME:
580 di->mixer_class = PAD_OUTPUT_CLASS;
581 strcpy(di->label.name, AudioNmaster);
582 di->type = AUDIO_MIXER_VALUE;
583 di->next = di->prev = AUDIO_MIXER_LAST;
584 di->un.v.num_channels = 1;
585 strcpy(di->un.v.units.name, AudioNvolume);
586 return 0;
587 case PAD_INPUT_DAC_VOLUME:
588 di->mixer_class = PAD_INPUT_CLASS;
589 strcpy(di->label.name, AudioNdac);
590 di->type = AUDIO_MIXER_VALUE;
591 di->next = di->prev = AUDIO_MIXER_LAST;
592 di->un.v.num_channels = 1;
593 strcpy(di->un.v.units.name, AudioNvolume);
594 return 0;
595 }
596
597 return ENXIO;
598 }
599
600 static int
601 pad_get_props(void *opaque)
602 {
603 pad_softc_t *sc __diagused;
604
605 sc = (pad_softc_t *)opaque;
606
607 KASSERT(mutex_owned(&sc->sc_lock));
608
609 #if defined(PAD_SUPPORT_RECORD)
610 return 0;
611 #else
612 return AUDIO_PROP_PLAYBACK;
613 #endif
614 }
615
616 static void
617 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread)
618 {
619 pad_softc_t *sc;
620
621 sc = (pad_softc_t *)opaque;
622
623 *intr = &sc->sc_intr_lock;
624 *thread = &sc->sc_lock;
625 }
626
627 static void
628 pad_swvol_codec(audio_filter_arg_t *arg)
629 {
630 struct pad_softc *sc = arg->context;
631 const aint_t *src;
632 aint_t *dst;
633 u_int sample_count;
634 u_int i;
635
636 src = arg->src;
637 dst = arg->dst;
638 sample_count = arg->count * arg->srcfmt->channels;
639 for (i = 0; i < sample_count; i++) {
640 aint2_t v = (aint2_t)(*src++);
641 v = v * sc->sc_swvol / 255;
642 *dst++ = (aint_t)v;
643 }
644 }
645
646 MODULE(MODULE_CLASS_DRIVER, pad, "audio");
647
648 #ifdef _MODULE
649
650 static const struct cfiattrdata audiobuscf_iattrdata = {
651 "audiobus", 0, { { NULL, NULL, 0 }, }
652 };
653 static const struct cfiattrdata * const pad_attrs[] = {
654 &audiobuscf_iattrdata, NULL
655 };
656
657 CFDRIVER_DECL(pad, DV_DULL, pad_attrs);
658 extern struct cfattach pad_ca;
659 static int padloc[] = { -1, -1 };
660
661 static struct cfdata pad_cfdata[] = {
662 {
663 .cf_name = "pad",
664 .cf_atname = "pad",
665 .cf_unit = 0,
666 .cf_fstate = FSTATE_STAR,
667 .cf_loc = padloc,
668 .cf_flags = 0,
669 .cf_pspec = NULL,
670 },
671 { NULL, NULL, 0, 0, NULL, 0, NULL }
672 };
673 #endif
674
675 static int
676 pad_modcmd(modcmd_t cmd, void *arg)
677 {
678 #ifdef _MODULE
679 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR;
680 #endif
681 int error = 0;
682
683 switch (cmd) {
684 case MODULE_CMD_INIT:
685 #ifdef _MODULE
686 error = config_cfdriver_attach(&pad_cd);
687 if (error) {
688 break;
689 }
690
691 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca);
692 if (error) {
693 config_cfdriver_detach(&pad_cd);
694 aprint_error("%s: unable to register cfattach\n",
695 pad_cd.cd_name);
696
697 break;
698 }
699
700 error = config_cfdata_attach(pad_cfdata, 1);
701 if (error) {
702 config_cfattach_detach(pad_cd.cd_name, &pad_ca);
703 config_cfdriver_detach(&pad_cd);
704 aprint_error("%s: unable to register cfdata\n",
705 pad_cd.cd_name);
706
707 break;
708 }
709
710 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor,
711 &pad_cdevsw, &cmajor);
712 if (error) {
713 config_cfdata_detach(pad_cfdata);
714 config_cfattach_detach(pad_cd.cd_name, &pad_ca);
715 config_cfdriver_detach(&pad_cd);
716 aprint_error("%s: unable to register devsw\n",
717 pad_cd.cd_name);
718
719 break;
720 }
721
722 (void)config_attach_pseudo(pad_cfdata);
723 #endif
724
725 break;
726 case MODULE_CMD_FINI:
727 #ifdef _MODULE
728 error = config_cfdata_detach(pad_cfdata);
729 if (error) {
730 break;
731 }
732
733 config_cfattach_detach(pad_cd.cd_name, &pad_ca);
734 config_cfdriver_detach(&pad_cd);
735 devsw_detach(NULL, &pad_cdevsw);
736 #endif
737
738 break;
739 default:
740 error = ENOTTY;
741 }
742
743 return error;
744 }
745