ALSA: usb-audio: export snd_usb_feature_unit_ctl
[linux-2.6.git] / sound / usb / mixer_quirks.c
1 /*
2  *   USB Audio Driver for ALSA
3  *
4  *   Quirks and vendor-specific extensions for mixer interfaces
5  *
6  *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7  *
8  *   Many codes borrowed from audio.c by
9  *          Alan Cox (alan@lxorguk.ukuu.org.uk)
10  *          Thomas Sailer (sailer@ife.ee.ethz.ch)
11  *
12  *
13  *   This program is free software; you can redistribute it and/or modify
14  *   it under the terms of the GNU General Public License as published by
15  *   the Free Software Foundation; either version 2 of the License, or
16  *   (at your option) any later version.
17  *
18  *   This program is distributed in the hope that it will be useful,
19  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
20  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  *   GNU General Public License for more details.
22  *
23  *   You should have received a copy of the GNU General Public License
24  *   along with this program; if not, write to the Free Software
25  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
26  */
27
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/usb.h>
31 #include <linux/usb/audio.h>
32
33 #include <sound/core.h>
34 #include <sound/control.h>
35 #include <sound/hwdep.h>
36 #include <sound/info.h>
37
38 #include "usbaudio.h"
39 #include "mixer.h"
40 #include "mixer_quirks.h"
41 #include "helper.h"
42
43 /*
44  * Sound Blaster remote control configuration
45  *
46  * format of remote control data:
47  * Extigy:       xx 00
48  * Audigy 2 NX:  06 80 xx 00 00 00
49  * Live! 24-bit: 06 80 xx yy 22 83
50  */
51 static const struct rc_config {
52         u32 usb_id;
53         u8  offset;
54         u8  length;
55         u8  packet_length;
56         u8  min_packet_length; /* minimum accepted length of the URB result */
57         u8  mute_mixer_id;
58         u32 mute_code;
59 } rc_configs[] = {
60         { USB_ID(0x041e, 0x3000), 0, 1, 2, 1,  18, 0x0013 }, /* Extigy       */
61         { USB_ID(0x041e, 0x3020), 2, 1, 6, 6,  18, 0x0013 }, /* Audigy 2 NX  */
62         { USB_ID(0x041e, 0x3040), 2, 2, 6, 6,  2,  0x6e91 }, /* Live! 24-bit */
63         { USB_ID(0x041e, 0x3042), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 */
64         { USB_ID(0x041e, 0x30df), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 Pro */
65         { USB_ID(0x041e, 0x3048), 2, 2, 6, 6,  2,  0x6e91 }, /* Toshiba SB0500 */
66 };
67
68 static void snd_usb_soundblaster_remote_complete(struct urb *urb)
69 {
70         struct usb_mixer_interface *mixer = urb->context;
71         const struct rc_config *rc = mixer->rc_cfg;
72         u32 code;
73
74         if (urb->status < 0 || urb->actual_length < rc->min_packet_length)
75                 return;
76
77         code = mixer->rc_buffer[rc->offset];
78         if (rc->length == 2)
79                 code |= mixer->rc_buffer[rc->offset + 1] << 8;
80
81         /* the Mute button actually changes the mixer control */
82         if (code == rc->mute_code)
83                 snd_usb_mixer_notify_id(mixer, rc->mute_mixer_id);
84         mixer->rc_code = code;
85         wmb();
86         wake_up(&mixer->rc_waitq);
87 }
88
89 static long snd_usb_sbrc_hwdep_read(struct snd_hwdep *hw, char __user *buf,
90                                      long count, loff_t *offset)
91 {
92         struct usb_mixer_interface *mixer = hw->private_data;
93         int err;
94         u32 rc_code;
95
96         if (count != 1 && count != 4)
97                 return -EINVAL;
98         err = wait_event_interruptible(mixer->rc_waitq,
99                                        (rc_code = xchg(&mixer->rc_code, 0)) != 0);
100         if (err == 0) {
101                 if (count == 1)
102                         err = put_user(rc_code, buf);
103                 else
104                         err = put_user(rc_code, (u32 __user *)buf);
105         }
106         return err < 0 ? err : count;
107 }
108
109 static unsigned int snd_usb_sbrc_hwdep_poll(struct snd_hwdep *hw, struct file *file,
110                                             poll_table *wait)
111 {
112         struct usb_mixer_interface *mixer = hw->private_data;
113
114         poll_wait(file, &mixer->rc_waitq, wait);
115         return mixer->rc_code ? POLLIN | POLLRDNORM : 0;
116 }
117
118 static int snd_usb_soundblaster_remote_init(struct usb_mixer_interface *mixer)
119 {
120         struct snd_hwdep *hwdep;
121         int err, len, i;
122
123         for (i = 0; i < ARRAY_SIZE(rc_configs); ++i)
124                 if (rc_configs[i].usb_id == mixer->chip->usb_id)
125                         break;
126         if (i >= ARRAY_SIZE(rc_configs))
127                 return 0;
128         mixer->rc_cfg = &rc_configs[i];
129
130         len = mixer->rc_cfg->packet_length;
131
132         init_waitqueue_head(&mixer->rc_waitq);
133         err = snd_hwdep_new(mixer->chip->card, "SB remote control", 0, &hwdep);
134         if (err < 0)
135                 return err;
136         snprintf(hwdep->name, sizeof(hwdep->name),
137                  "%s remote control", mixer->chip->card->shortname);
138         hwdep->iface = SNDRV_HWDEP_IFACE_SB_RC;
139         hwdep->private_data = mixer;
140         hwdep->ops.read = snd_usb_sbrc_hwdep_read;
141         hwdep->ops.poll = snd_usb_sbrc_hwdep_poll;
142         hwdep->exclusive = 1;
143
144         mixer->rc_urb = usb_alloc_urb(0, GFP_KERNEL);
145         if (!mixer->rc_urb)
146                 return -ENOMEM;
147         mixer->rc_setup_packet = kmalloc(sizeof(*mixer->rc_setup_packet), GFP_KERNEL);
148         if (!mixer->rc_setup_packet) {
149                 usb_free_urb(mixer->rc_urb);
150                 mixer->rc_urb = NULL;
151                 return -ENOMEM;
152         }
153         mixer->rc_setup_packet->bRequestType =
154                 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
155         mixer->rc_setup_packet->bRequest = UAC_GET_MEM;
156         mixer->rc_setup_packet->wValue = cpu_to_le16(0);
157         mixer->rc_setup_packet->wIndex = cpu_to_le16(0);
158         mixer->rc_setup_packet->wLength = cpu_to_le16(len);
159         usb_fill_control_urb(mixer->rc_urb, mixer->chip->dev,
160                              usb_rcvctrlpipe(mixer->chip->dev, 0),
161                              (u8*)mixer->rc_setup_packet, mixer->rc_buffer, len,
162                              snd_usb_soundblaster_remote_complete, mixer);
163         return 0;
164 }
165
166 #define snd_audigy2nx_led_info          snd_ctl_boolean_mono_info
167
168 static int snd_audigy2nx_led_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
169 {
170         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
171         int index = kcontrol->private_value;
172
173         ucontrol->value.integer.value[0] = mixer->audigy2nx_leds[index];
174         return 0;
175 }
176
177 static int snd_audigy2nx_led_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
178 {
179         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
180         int index = kcontrol->private_value;
181         int value = ucontrol->value.integer.value[0];
182         int err, changed;
183
184         if (value > 1)
185                 return -EINVAL;
186         changed = value != mixer->audigy2nx_leds[index];
187         if (mixer->chip->usb_id == USB_ID(0x041e, 0x3042))
188                 err = snd_usb_ctl_msg(mixer->chip->dev,
189                               usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
190                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
191                               !value, 0, NULL, 0, 100);
192         /* USB X-Fi S51 Pro */
193         if (mixer->chip->usb_id == USB_ID(0x041e, 0x30df))
194                 err = snd_usb_ctl_msg(mixer->chip->dev,
195                               usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
196                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
197                               !value, 0, NULL, 0, 100);
198         else
199                 err = snd_usb_ctl_msg(mixer->chip->dev,
200                               usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
201                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
202                               value, index + 2, NULL, 0, 100);
203         if (err < 0)
204                 return err;
205         mixer->audigy2nx_leds[index] = value;
206         return changed;
207 }
208
209 static struct snd_kcontrol_new snd_audigy2nx_controls[] = {
210         {
211                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
212                 .name = "CMSS LED Switch",
213                 .info = snd_audigy2nx_led_info,
214                 .get = snd_audigy2nx_led_get,
215                 .put = snd_audigy2nx_led_put,
216                 .private_value = 0,
217         },
218         {
219                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
220                 .name = "Power LED Switch",
221                 .info = snd_audigy2nx_led_info,
222                 .get = snd_audigy2nx_led_get,
223                 .put = snd_audigy2nx_led_put,
224                 .private_value = 1,
225         },
226         {
227                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
228                 .name = "Dolby Digital LED Switch",
229                 .info = snd_audigy2nx_led_info,
230                 .get = snd_audigy2nx_led_get,
231                 .put = snd_audigy2nx_led_put,
232                 .private_value = 2,
233         },
234 };
235
236 static int snd_audigy2nx_controls_create(struct usb_mixer_interface *mixer)
237 {
238         int i, err;
239
240         for (i = 0; i < ARRAY_SIZE(snd_audigy2nx_controls); ++i) {
241                 /* USB X-Fi S51 doesn't have a CMSS LED */
242                 if ((mixer->chip->usb_id == USB_ID(0x041e, 0x3042)) && i == 0)
243                         continue;
244                 /* USB X-Fi S51 Pro doesn't have one either */
245                 if ((mixer->chip->usb_id == USB_ID(0x041e, 0x30df)) && i == 0)
246                         continue;
247                 if (i > 1 && /* Live24ext has 2 LEDs only */
248                         (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
249                          mixer->chip->usb_id == USB_ID(0x041e, 0x3042) ||
250                          mixer->chip->usb_id == USB_ID(0x041e, 0x30df) ||
251                          mixer->chip->usb_id == USB_ID(0x041e, 0x3048)))
252                         break; 
253                 err = snd_ctl_add(mixer->chip->card,
254                                   snd_ctl_new1(&snd_audigy2nx_controls[i], mixer));
255                 if (err < 0)
256                         return err;
257         }
258         mixer->audigy2nx_leds[1] = 1; /* Power LED is on by default */
259         return 0;
260 }
261
262 static void snd_audigy2nx_proc_read(struct snd_info_entry *entry,
263                                     struct snd_info_buffer *buffer)
264 {
265         static const struct sb_jack {
266                 int unitid;
267                 const char *name;
268         }  jacks_audigy2nx[] = {
269                 {4,  "dig in "},
270                 {7,  "line in"},
271                 {19, "spk out"},
272                 {20, "hph out"},
273                 {-1, NULL}
274         }, jacks_live24ext[] = {
275                 {4,  "line in"}, /* &1=Line, &2=Mic*/
276                 {3,  "hph out"}, /* headphones */
277                 {0,  "RC     "}, /* last command, 6 bytes see rc_config above */
278                 {-1, NULL}
279         };
280         const struct sb_jack *jacks;
281         struct usb_mixer_interface *mixer = entry->private_data;
282         int i, err;
283         u8 buf[3];
284
285         snd_iprintf(buffer, "%s jacks\n\n", mixer->chip->card->shortname);
286         if (mixer->chip->usb_id == USB_ID(0x041e, 0x3020))
287                 jacks = jacks_audigy2nx;
288         else if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
289                  mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
290                 jacks = jacks_live24ext;
291         else
292                 return;
293
294         for (i = 0; jacks[i].name; ++i) {
295                 snd_iprintf(buffer, "%s: ", jacks[i].name);
296                 err = snd_usb_ctl_msg(mixer->chip->dev,
297                                       usb_rcvctrlpipe(mixer->chip->dev, 0),
298                                       UAC_GET_MEM, USB_DIR_IN | USB_TYPE_CLASS |
299                                       USB_RECIP_INTERFACE, 0,
300                                       jacks[i].unitid << 8, buf, 3, 100);
301                 if (err == 3 && (buf[0] == 3 || buf[0] == 6))
302                         snd_iprintf(buffer, "%02x %02x\n", buf[1], buf[2]);
303                 else
304                         snd_iprintf(buffer, "?\n");
305         }
306 }
307
308 static int snd_xonar_u1_switch_get(struct snd_kcontrol *kcontrol,
309                                    struct snd_ctl_elem_value *ucontrol)
310 {
311         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
312
313         ucontrol->value.integer.value[0] = !!(mixer->xonar_u1_status & 0x02);
314         return 0;
315 }
316
317 static int snd_xonar_u1_switch_put(struct snd_kcontrol *kcontrol,
318                                    struct snd_ctl_elem_value *ucontrol)
319 {
320         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
321         u8 old_status, new_status;
322         int err, changed;
323
324         old_status = mixer->xonar_u1_status;
325         if (ucontrol->value.integer.value[0])
326                 new_status = old_status | 0x02;
327         else
328                 new_status = old_status & ~0x02;
329         changed = new_status != old_status;
330         err = snd_usb_ctl_msg(mixer->chip->dev,
331                               usb_sndctrlpipe(mixer->chip->dev, 0), 0x08,
332                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
333                               50, 0, &new_status, 1, 100);
334         if (err < 0)
335                 return err;
336         mixer->xonar_u1_status = new_status;
337         return changed;
338 }
339
340 static struct snd_kcontrol_new snd_xonar_u1_output_switch = {
341         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
342         .name = "Digital Playback Switch",
343         .info = snd_ctl_boolean_mono_info,
344         .get = snd_xonar_u1_switch_get,
345         .put = snd_xonar_u1_switch_put,
346 };
347
348 static int snd_xonar_u1_controls_create(struct usb_mixer_interface *mixer)
349 {
350         int err;
351
352         err = snd_ctl_add(mixer->chip->card,
353                           snd_ctl_new1(&snd_xonar_u1_output_switch, mixer));
354         if (err < 0)
355                 return err;
356         mixer->xonar_u1_status = 0x05;
357         return 0;
358 }
359
360 /* Native Instruments device quirks */
361
362 #define _MAKE_NI_CONTROL(bRequest,wIndex) ((bRequest) << 16 | (wIndex))
363
364 static int snd_nativeinstruments_control_get(struct snd_kcontrol *kcontrol,
365                                              struct snd_ctl_elem_value *ucontrol)
366 {
367         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
368         struct usb_device *dev = mixer->chip->dev;
369         u8 bRequest = (kcontrol->private_value >> 16) & 0xff;
370         u16 wIndex = kcontrol->private_value & 0xffff;
371         u8 tmp;
372
373         int ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), bRequest,
374                                   USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
375                                   0, cpu_to_le16(wIndex),
376                                   &tmp, sizeof(tmp), 1000);
377
378         if (ret < 0) {
379                 snd_printk(KERN_ERR
380                            "unable to issue vendor read request (ret = %d)", ret);
381                 return ret;
382         }
383
384         ucontrol->value.integer.value[0] = tmp;
385
386         return 0;
387 }
388
389 static int snd_nativeinstruments_control_put(struct snd_kcontrol *kcontrol,
390                                              struct snd_ctl_elem_value *ucontrol)
391 {
392         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
393         struct usb_device *dev = mixer->chip->dev;
394         u8 bRequest = (kcontrol->private_value >> 16) & 0xff;
395         u16 wIndex = kcontrol->private_value & 0xffff;
396         u16 wValue = ucontrol->value.integer.value[0];
397
398         int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), bRequest,
399                                   USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
400                                   cpu_to_le16(wValue), cpu_to_le16(wIndex),
401                                   NULL, 0, 1000);
402
403         if (ret < 0) {
404                 snd_printk(KERN_ERR
405                            "unable to issue vendor write request (ret = %d)", ret);
406                 return ret;
407         }
408
409         return 0;
410 }
411
412 static struct snd_kcontrol_new snd_nativeinstruments_ta6_mixers[] = {
413         {
414                 .name = "Direct Thru Channel A",
415                 .private_value = _MAKE_NI_CONTROL(0x01, 0x03),
416         },
417         {
418                 .name = "Direct Thru Channel B",
419                 .private_value = _MAKE_NI_CONTROL(0x01, 0x05),
420         },
421         {
422                 .name = "Phono Input Channel A",
423                 .private_value = _MAKE_NI_CONTROL(0x02, 0x03),
424         },
425         {
426                 .name = "Phono Input Channel B",
427                 .private_value = _MAKE_NI_CONTROL(0x02, 0x05),
428         },
429 };
430
431 static struct snd_kcontrol_new snd_nativeinstruments_ta10_mixers[] = {
432         {
433                 .name = "Direct Thru Channel A",
434                 .private_value = _MAKE_NI_CONTROL(0x01, 0x03),
435         },
436         {
437                 .name = "Direct Thru Channel B",
438                 .private_value = _MAKE_NI_CONTROL(0x01, 0x05),
439         },
440         {
441                 .name = "Direct Thru Channel C",
442                 .private_value = _MAKE_NI_CONTROL(0x01, 0x07),
443         },
444         {
445                 .name = "Direct Thru Channel D",
446                 .private_value = _MAKE_NI_CONTROL(0x01, 0x09),
447         },
448         {
449                 .name = "Phono Input Channel A",
450                 .private_value = _MAKE_NI_CONTROL(0x02, 0x03),
451         },
452         {
453                 .name = "Phono Input Channel B",
454                 .private_value = _MAKE_NI_CONTROL(0x02, 0x05),
455         },
456         {
457                 .name = "Phono Input Channel C",
458                 .private_value = _MAKE_NI_CONTROL(0x02, 0x07),
459         },
460         {
461                 .name = "Phono Input Channel D",
462                 .private_value = _MAKE_NI_CONTROL(0x02, 0x09),
463         },
464 };
465
466 static int snd_nativeinstruments_create_mixer(struct usb_mixer_interface *mixer,
467                                               const struct snd_kcontrol_new *kc,
468                                               unsigned int count)
469 {
470         int i, err = 0;
471         struct snd_kcontrol_new template = {
472                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
473                 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
474                 .get = snd_nativeinstruments_control_get,
475                 .put = snd_nativeinstruments_control_put,
476                 .info = snd_ctl_boolean_mono_info,
477         };
478
479         for (i = 0; i < count; i++) {
480                 struct snd_kcontrol *c;
481
482                 template.name = kc[i].name;
483                 template.private_value = kc[i].private_value;
484
485                 c = snd_ctl_new1(&template, mixer);
486                 err = snd_ctl_add(mixer->chip->card, c);
487
488                 if (err < 0)
489                         break;
490         }
491
492         return err;
493 }
494
495 void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
496                                unsigned char samplerate_id)
497 {
498         struct usb_mixer_interface *mixer;
499         struct usb_mixer_elem_info *cval;
500         int unitid = 12; /* SamleRate ExtensionUnit ID */
501
502         list_for_each_entry(mixer, &chip->mixer_list, list) {
503                 cval = mixer->id_elems[unitid];
504                 if (cval) {
505                         snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR,
506                                                     cval->control << 8,
507                                                     samplerate_id);
508                         snd_usb_mixer_notify_id(mixer, unitid);
509                 }
510                 break;
511         }
512 }
513
514 int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
515 {
516         int err = 0;
517         struct snd_info_entry *entry;
518
519         if ((err = snd_usb_soundblaster_remote_init(mixer)) < 0)
520                 return err;
521
522         switch (mixer->chip->usb_id) {
523         case USB_ID(0x041e, 0x3020):
524         case USB_ID(0x041e, 0x3040):
525         case USB_ID(0x041e, 0x3042):
526         case USB_ID(0x041e, 0x30df):
527         case USB_ID(0x041e, 0x3048):
528                 err = snd_audigy2nx_controls_create(mixer);
529                 if (err < 0)
530                         break;
531                 if (!snd_card_proc_new(mixer->chip->card, "audigy2nx", &entry))
532                         snd_info_set_text_ops(entry, mixer,
533                                               snd_audigy2nx_proc_read);
534                 break;
535
536         case USB_ID(0x0b05, 0x1739):
537         case USB_ID(0x0b05, 0x1743):
538                 err = snd_xonar_u1_controls_create(mixer);
539                 break;
540
541         case USB_ID(0x17cc, 0x1011): /* Traktor Audio 6 */
542                 err = snd_nativeinstruments_create_mixer(mixer,
543                                 snd_nativeinstruments_ta6_mixers,
544                                 ARRAY_SIZE(snd_nativeinstruments_ta6_mixers));
545                 break;
546
547         case USB_ID(0x17cc, 0x1021): /* Traktor Audio 10 */
548                 err = snd_nativeinstruments_create_mixer(mixer,
549                                 snd_nativeinstruments_ta10_mixers,
550                                 ARRAY_SIZE(snd_nativeinstruments_ta10_mixers));
551                 break;
552         }
553
554         return err;
555 }
556
557 void snd_usb_mixer_rc_memory_change(struct usb_mixer_interface *mixer,
558                                     int unitid)
559 {
560         if (!mixer->rc_cfg)
561                 return;
562         /* unit ids specific to Extigy/Audigy 2 NX: */
563         switch (unitid) {
564         case 0: /* remote control */
565                 mixer->rc_urb->dev = mixer->chip->dev;
566                 usb_submit_urb(mixer->rc_urb, GFP_ATOMIC);
567                 break;
568         case 4: /* digital in jack */
569         case 7: /* line in jacks */
570         case 19: /* speaker out jacks */
571         case 20: /* headphones out jack */
572                 break;
573         /* live24ext: 4 = line-in jack */
574         case 3: /* hp-out jack (may actuate Mute) */
575                 if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
576                     mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
577                         snd_usb_mixer_notify_id(mixer, mixer->rc_cfg->mute_mixer_id);
578                 break;
579         default:
580                 snd_printd(KERN_DEBUG "memory change in unknown unit %d\n", unitid);
581                 break;
582         }
583 }
584