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[PATCH] Driver Core: remove driver model detach_state
[linux-2.6/verdex.git] / sound / pci / ac97 / ac97_proc.c
bloba040b2666ed73bfb786558d4481d612062c708ab
1 /*
2 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
3 * Universal interface for Audio Codec '97
4 *
5 * For more details look to AC '97 component specification revision 2.2
6 * by Intel Corporation (http://developer.intel.com).
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25 #include <sound/driver.h>
26 #include <linux/slab.h>
27 #include <sound/core.h>
28 #include <sound/ac97_codec.h>
29 #include <sound/asoundef.h>
30 #include "ac97_local.h"
31 #include "ac97_id.h"
32
33 /*
34 * proc interface
35 */
36
37 static void snd_ac97_proc_read_functions(ac97_t *ac97, snd_info_buffer_t *buffer)
38 {
39 int header = 0, function;
40 unsigned short info, sense_info;
41 static const char *function_names[12] = {
42 "Master Out", "AUX Out", "Center/LFE Out", "SPDIF Out",
43 "Phone In", "Mic 1", "Mic 2", "Line In", "CD In", "Video In",
44 "Aux In", "Mono Out"
45 };
46 static const char *locations[8] = {
47 "Rear I/O Panel", "Front Panel", "Motherboard", "Dock/External",
48 "reserved", "reserved", "reserved", "NC/unused"
49 };
50
51 for (function = 0; function < 12; ++function) {
52 snd_ac97_write(ac97, AC97_FUNC_SELECT, function << 1);
53 info = snd_ac97_read(ac97, AC97_FUNC_INFO);
54 if (!(info & 0x0001))
55 continue;
56 if (!header) {
57 snd_iprintf(buffer, "\n Gain Inverted Buffer delay Location\n");
58 header = 1;
59 }
60 sense_info = snd_ac97_read(ac97, AC97_SENSE_INFO);
61 snd_iprintf(buffer, "%-17s: %3d.%d dBV %c %2d/fs %s\n",
62 function_names[function],
63 (info & 0x8000 ? -1 : 1) * ((info & 0x7000) >> 12) * 3 / 2,
64 ((info & 0x0800) >> 11) * 5,
65 info & 0x0400 ? 'X' : '-',
66 (info & 0x03e0) >> 5,
67 locations[sense_info >> 13]);
68 }
69 }
70
71 static void snd_ac97_proc_read_main(ac97_t *ac97, snd_info_buffer_t * buffer, int subidx)
72 {
73 char name[64];
74 unsigned short val, tmp, ext, mext;
75 static const char *spdif_slots[4] = { " SPDIF=3/4", " SPDIF=7/8", " SPDIF=6/9", " SPDIF=10/11" };
76 static const char *spdif_rates[4] = { " Rate=44.1kHz", " Rate=res", " Rate=48kHz", " Rate=32kHz" };
77 static const char *spdif_rates_cs4205[4] = { " Rate=48kHz", " Rate=44.1kHz", " Rate=res", " Rate=res" };
78 static const char *double_rate_slots[4] = { "10/11", "7/8", "reserved", "reserved" };
79
80 snd_ac97_get_name(NULL, ac97->id, name, 0);
81 snd_iprintf(buffer, "%d-%d/%d: %s\n\n", ac97->addr, ac97->num, subidx, name);
82 if ((ac97->scaps & AC97_SCAP_AUDIO) == 0)
83 goto __modem;
84
85 if ((ac97->ext_id & AC97_EI_REV_MASK) >= AC97_EI_REV_23) {
86 val = snd_ac97_read(ac97, AC97_INT_PAGING);
87 snd_ac97_update_bits(ac97, AC97_INT_PAGING,
88 AC97_PAGE_MASK, AC97_PAGE_1);
89 tmp = snd_ac97_read(ac97, AC97_CODEC_CLASS_REV);
90 snd_iprintf(buffer, "Revision : 0x%02x\n", tmp & 0xff);
91 snd_iprintf(buffer, "Compat. Class : 0x%02x\n", (tmp >> 8) & 0x1f);
92 snd_iprintf(buffer, "Subsys. Vendor ID: 0x%04x\n",
93 snd_ac97_read(ac97, AC97_PCI_SVID));
94 snd_iprintf(buffer, "Subsys. ID : 0x%04x\n\n",
95 snd_ac97_read(ac97, AC97_PCI_SID));
96 snd_ac97_update_bits(ac97, AC97_INT_PAGING,
97 AC97_PAGE_MASK, val & AC97_PAGE_MASK);
98 }
99
100 // val = snd_ac97_read(ac97, AC97_RESET);
101 val = ac97->caps;
102 snd_iprintf(buffer, "Capabilities :%s%s%s%s%s%s\n",
103 val & AC97_BC_DEDICATED_MIC ? " -dedicated MIC PCM IN channel-" : "",
104 val & AC97_BC_RESERVED1 ? " -reserved1-" : "",
105 val & AC97_BC_BASS_TREBLE ? " -bass & treble-" : "",
106 val & AC97_BC_SIM_STEREO ? " -simulated stereo-" : "",
107 val & AC97_BC_HEADPHONE ? " -headphone out-" : "",
108 val & AC97_BC_LOUDNESS ? " -loudness-" : "");
109 tmp = ac97->caps & AC97_BC_DAC_MASK;
110 snd_iprintf(buffer, "DAC resolution : %s%s%s%s\n",
111 tmp == AC97_BC_16BIT_DAC ? "16-bit" : "",
112 tmp == AC97_BC_18BIT_DAC ? "18-bit" : "",
113 tmp == AC97_BC_20BIT_DAC ? "20-bit" : "",
114 tmp == AC97_BC_DAC_MASK ? "???" : "");
115 tmp = ac97->caps & AC97_BC_ADC_MASK;
116 snd_iprintf(buffer, "ADC resolution : %s%s%s%s\n",
117 tmp == AC97_BC_16BIT_ADC ? "16-bit" : "",
118 tmp == AC97_BC_18BIT_ADC ? "18-bit" : "",
119 tmp == AC97_BC_20BIT_ADC ? "20-bit" : "",
120 tmp == AC97_BC_ADC_MASK ? "???" : "");
121 snd_iprintf(buffer, "3D enhancement : %s\n",
122 snd_ac97_stereo_enhancements[(val >> 10) & 0x1f]);
123 snd_iprintf(buffer, "\nCurrent setup\n");
124 val = snd_ac97_read(ac97, AC97_MIC);
125 snd_iprintf(buffer, "Mic gain : %s [%s]\n", val & 0x0040 ? "+20dB" : "+0dB", ac97->regs[AC97_MIC] & 0x0040 ? "+20dB" : "+0dB");
126 val = snd_ac97_read(ac97, AC97_GENERAL_PURPOSE);
127 snd_iprintf(buffer, "POP path : %s 3D\n"
128 "Sim. stereo : %s\n"
129 "3D enhancement : %s\n"
130 "Loudness : %s\n"
131 "Mono output : %s\n"
132 "Mic select : %s\n"
133 "ADC/DAC loopback : %s\n",
134 val & 0x8000 ? "post" : "pre",
135 val & 0x4000 ? "on" : "off",
136 val & 0x2000 ? "on" : "off",
137 val & 0x1000 ? "on" : "off",
138 val & 0x0200 ? "Mic" : "MIX",
139 val & 0x0100 ? "Mic2" : "Mic1",
140 val & 0x0080 ? "on" : "off");
141 if (ac97->ext_id & AC97_EI_DRA)
142 snd_iprintf(buffer, "Double rate slots: %s\n",
143 double_rate_slots[(val >> 10) & 3]);
144
145 ext = snd_ac97_read(ac97, AC97_EXTENDED_ID);
146 if (ext == 0)
147 goto __modem;
148
149 snd_iprintf(buffer, "Extended ID : codec=%i rev=%i%s%s%s%s DSA=%i%s%s%s%s\n",
150 (ext & AC97_EI_ADDR_MASK) >> AC97_EI_ADDR_SHIFT,
151 (ext & AC97_EI_REV_MASK) >> AC97_EI_REV_SHIFT,
152 ext & AC97_EI_AMAP ? " AMAP" : "",
153 ext & AC97_EI_LDAC ? " LDAC" : "",
154 ext & AC97_EI_SDAC ? " SDAC" : "",
155 ext & AC97_EI_CDAC ? " CDAC" : "",
156 (ext & AC97_EI_DACS_SLOT_MASK) >> AC97_EI_DACS_SLOT_SHIFT,
157 ext & AC97_EI_VRM ? " VRM" : "",
158 ext & AC97_EI_SPDIF ? " SPDIF" : "",
159 ext & AC97_EI_DRA ? " DRA" : "",
160 ext & AC97_EI_VRA ? " VRA" : "");
161 val = snd_ac97_read(ac97, AC97_EXTENDED_STATUS);
162 snd_iprintf(buffer, "Extended status :%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
163 val & AC97_EA_PRL ? " PRL" : "",
164 val & AC97_EA_PRK ? " PRK" : "",
165 val & AC97_EA_PRJ ? " PRJ" : "",
166 val & AC97_EA_PRI ? " PRI" : "",
167 val & AC97_EA_SPCV ? " SPCV" : "",
168 val & AC97_EA_MDAC ? " MADC" : "",
169 val & AC97_EA_LDAC ? " LDAC" : "",
170 val & AC97_EA_SDAC ? " SDAC" : "",
171 val & AC97_EA_CDAC ? " CDAC" : "",
172 ext & AC97_EI_SPDIF ? spdif_slots[(val & AC97_EA_SPSA_SLOT_MASK) >> AC97_EA_SPSA_SLOT_SHIFT] : "",
173 val & AC97_EA_VRM ? " VRM" : "",
174 val & AC97_EA_SPDIF ? " SPDIF" : "",
175 val & AC97_EA_DRA ? " DRA" : "",
176 val & AC97_EA_VRA ? " VRA" : "");
177 if (ext & AC97_EI_VRA) { /* VRA */
178 val = snd_ac97_read(ac97, AC97_PCM_FRONT_DAC_RATE);
179 snd_iprintf(buffer, "PCM front DAC : %iHz\n", val);
180 if (ext & AC97_EI_SDAC) {
181 val = snd_ac97_read(ac97, AC97_PCM_SURR_DAC_RATE);
182 snd_iprintf(buffer, "PCM Surr DAC : %iHz\n", val);
183 }
184 if (ext & AC97_EI_LDAC) {
185 val = snd_ac97_read(ac97, AC97_PCM_LFE_DAC_RATE);
186 snd_iprintf(buffer, "PCM LFE DAC : %iHz\n", val);
187 }
188 val = snd_ac97_read(ac97, AC97_PCM_LR_ADC_RATE);
189 snd_iprintf(buffer, "PCM ADC : %iHz\n", val);
190 }
191 if (ext & AC97_EI_VRM) {
192 val = snd_ac97_read(ac97, AC97_PCM_MIC_ADC_RATE);
193 snd_iprintf(buffer, "PCM MIC ADC : %iHz\n", val);
194 }
195 if ((ext & AC97_EI_SPDIF) || (ac97->flags & AC97_CS_SPDIF)) {
196 if (ac97->flags & AC97_CS_SPDIF)
197 val = snd_ac97_read(ac97, AC97_CSR_SPDIF);
198 else
199 val = snd_ac97_read(ac97, AC97_SPDIF);
200
201 snd_iprintf(buffer, "SPDIF Control :%s%s%s%s Category=0x%x Generation=%i%s%s%s\n",
202 val & AC97_SC_PRO ? " PRO" : " Consumer",
203 val & AC97_SC_NAUDIO ? " Non-audio" : " PCM",
204 val & AC97_SC_COPY ? "" : " Copyright",
205 val & AC97_SC_PRE ? " Preemph50/15" : "",
206 (val & AC97_SC_CC_MASK) >> AC97_SC_CC_SHIFT,
207 (val & AC97_SC_L) >> 11,
208 (ac97->flags & AC97_CS_SPDIF) ?
209 spdif_rates_cs4205[(val & AC97_SC_SPSR_MASK) >> AC97_SC_SPSR_SHIFT] :
210 spdif_rates[(val & AC97_SC_SPSR_MASK) >> AC97_SC_SPSR_SHIFT],
211 (ac97->flags & AC97_CS_SPDIF) ?
212 (val & AC97_SC_DRS ? " Validity" : "") :
213 (val & AC97_SC_DRS ? " DRS" : ""),
214 (ac97->flags & AC97_CS_SPDIF) ?
215 (val & AC97_SC_V ? " Enabled" : "") :
216 (val & AC97_SC_V ? " Validity" : ""));
217 /* ALC650 specific*/
218 if ((ac97->id & 0xfffffff0) == 0x414c4720 &&
219 (snd_ac97_read(ac97, AC97_ALC650_CLOCK) & 0x01)) {
220 val = snd_ac97_read(ac97, AC97_ALC650_SPDIF_INPUT_STATUS2);
221 if (val & AC97_ALC650_CLOCK_LOCK) {
222 val = snd_ac97_read(ac97, AC97_ALC650_SPDIF_INPUT_STATUS1);
223 snd_iprintf(buffer, "SPDIF In Status :%s%s%s%s Category=0x%x Generation=%i",
224 val & AC97_ALC650_PRO ? " PRO" : " Consumer",
225 val & AC97_ALC650_NAUDIO ? " Non-audio" : " PCM",
226 val & AC97_ALC650_COPY ? "" : " Copyright",
227 val & AC97_ALC650_PRE ? " Preemph50/15" : "",
228 (val & AC97_ALC650_CC_MASK) >> AC97_ALC650_CC_SHIFT,
229 (val & AC97_ALC650_L) >> 15);
230 val = snd_ac97_read(ac97, AC97_ALC650_SPDIF_INPUT_STATUS2);
231 snd_iprintf(buffer, "%s Accuracy=%i%s%s\n",
232 spdif_rates[(val & AC97_ALC650_SPSR_MASK) >> AC97_ALC650_SPSR_SHIFT],
233 (val & AC97_ALC650_CLOCK_ACCURACY) >> AC97_ALC650_CLOCK_SHIFT,
234 (val & AC97_ALC650_CLOCK_LOCK ? " Locked" : " Unlocked"),
235 (val & AC97_ALC650_V ? " Validity?" : ""));
236 } else {
237 snd_iprintf(buffer, "SPDIF In Status : Not Locked\n");
238 }
239 }
240 }
241 if ((ac97->ext_id & AC97_EI_REV_MASK) >= AC97_EI_REV_23) {
242 val = snd_ac97_read(ac97, AC97_INT_PAGING);
243 snd_ac97_update_bits(ac97, AC97_INT_PAGING,
244 AC97_PAGE_MASK, AC97_PAGE_1);
245 snd_ac97_proc_read_functions(ac97, buffer);
246 snd_ac97_update_bits(ac97, AC97_INT_PAGING,
247 AC97_PAGE_MASK, val & AC97_PAGE_MASK);
248 }
249
250
251 __modem:
252 mext = snd_ac97_read(ac97, AC97_EXTENDED_MID);
253 if (mext == 0)
254 return;
255
256 snd_iprintf(buffer, "Extended modem ID: codec=%i%s%s%s%s%s\n",
257 (mext & AC97_MEI_ADDR_MASK) >> AC97_MEI_ADDR_SHIFT,
258 mext & AC97_MEI_CID2 ? " CID2" : "",
259 mext & AC97_MEI_CID1 ? " CID1" : "",
260 mext & AC97_MEI_HANDSET ? " HSET" : "",
261 mext & AC97_MEI_LINE2 ? " LIN2" : "",
262 mext & AC97_MEI_LINE1 ? " LIN1" : "");
263 val = snd_ac97_read(ac97, AC97_EXTENDED_MSTATUS);
264 snd_iprintf(buffer, "Modem status :%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
265 val & AC97_MEA_GPIO ? " GPIO" : "",
266 val & AC97_MEA_MREF ? " MREF" : "",
267 val & AC97_MEA_ADC1 ? " ADC1" : "",
268 val & AC97_MEA_DAC1 ? " DAC1" : "",
269 val & AC97_MEA_ADC2 ? " ADC2" : "",
270 val & AC97_MEA_DAC2 ? " DAC2" : "",
271 val & AC97_MEA_HADC ? " HADC" : "",
272 val & AC97_MEA_HDAC ? " HDAC" : "",
273 val & AC97_MEA_PRA ? " PRA(GPIO)" : "",
274 val & AC97_MEA_PRB ? " PRB(res)" : "",
275 val & AC97_MEA_PRC ? " PRC(ADC1)" : "",
276 val & AC97_MEA_PRD ? " PRD(DAC1)" : "",
277 val & AC97_MEA_PRE ? " PRE(ADC2)" : "",
278 val & AC97_MEA_PRF ? " PRF(DAC2)" : "",
279 val & AC97_MEA_PRG ? " PRG(HADC)" : "",
280 val & AC97_MEA_PRH ? " PRH(HDAC)" : "");
281 if (mext & AC97_MEI_LINE1) {
282 val = snd_ac97_read(ac97, AC97_LINE1_RATE);
283 snd_iprintf(buffer, "Line1 rate : %iHz\n", val);
284 }
285 if (mext & AC97_MEI_LINE2) {
286 val = snd_ac97_read(ac97, AC97_LINE2_RATE);
287 snd_iprintf(buffer, "Line2 rate : %iHz\n", val);
288 }
289 if (mext & AC97_MEI_HANDSET) {
290 val = snd_ac97_read(ac97, AC97_HANDSET_RATE);
291 snd_iprintf(buffer, "Headset rate : %iHz\n", val);
292 }
293 }
294
295 static void snd_ac97_proc_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
296 {
297 ac97_t *ac97 = entry->private_data;
298
299 down(&ac97->page_mutex);
300 if ((ac97->id & 0xffffff40) == AC97_ID_AD1881) { // Analog Devices AD1881/85/86
301 int idx;
302 for (idx = 0; idx < 3; idx++)
303 if (ac97->spec.ad18xx.id[idx]) {
304 /* select single codec */
305 snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000,
306 ac97->spec.ad18xx.unchained[idx] | ac97->spec.ad18xx.chained[idx]);
307 snd_ac97_proc_read_main(ac97, buffer, idx);
308 snd_iprintf(buffer, "\n\n");
309 }
310 /* select all codecs */
311 snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000, 0x7000);
312
313 snd_iprintf(buffer, "\nAD18XX configuration\n");
314 snd_iprintf(buffer, "Unchained : 0x%04x,0x%04x,0x%04x\n",
315 ac97->spec.ad18xx.unchained[0],
316 ac97->spec.ad18xx.unchained[1],
317 ac97->spec.ad18xx.unchained[2]);
318 snd_iprintf(buffer, "Chained : 0x%04x,0x%04x,0x%04x\n",
319 ac97->spec.ad18xx.chained[0],
320 ac97->spec.ad18xx.chained[1],
321 ac97->spec.ad18xx.chained[2]);
322 } else {
323 snd_ac97_proc_read_main(ac97, buffer, 0);
324 }
325 up(&ac97->page_mutex);
326 }
327
328 #ifdef CONFIG_SND_DEBUG
329 /* direct register write for debugging */
330 static void snd_ac97_proc_regs_write(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
331 {
332 ac97_t *ac97 = entry->private_data;
333 char line[64];
334 unsigned int reg, val;
335 down(&ac97->page_mutex);
336 while (!snd_info_get_line(buffer, line, sizeof(line))) {
337 if (sscanf(line, "%x %x", &reg, &val) != 2)
338 continue;
339 /* register must be even */
340 if (reg < 0x80 && (reg & 1) == 0 && val <= 0xffff)
341 snd_ac97_write_cache(ac97, reg, val);
342 }
343 up(&ac97->page_mutex);
344 }
345 #endif
346
347 static void snd_ac97_proc_regs_read_main(ac97_t *ac97, snd_info_buffer_t * buffer, int subidx)
348 {
349 int reg, val;
350
351 for (reg = 0; reg < 0x80; reg += 2) {
352 val = snd_ac97_read(ac97, reg);
353 snd_iprintf(buffer, "%i:%02x = %04x\n", subidx, reg, val);
354 }
355 }
356
357 static void snd_ac97_proc_regs_read(snd_info_entry_t *entry,
358 snd_info_buffer_t * buffer)
359 {
360 ac97_t *ac97 = entry->private_data;
361
362 down(&ac97->page_mutex);
363 if ((ac97->id & 0xffffff40) == AC97_ID_AD1881) { // Analog Devices AD1881/85/86
364
365 int idx;
366 for (idx = 0; idx < 3; idx++)
367 if (ac97->spec.ad18xx.id[idx]) {
368 /* select single codec */
369 snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000,
370 ac97->spec.ad18xx.unchained[idx] | ac97->spec.ad18xx.chained[idx]);
371 snd_ac97_proc_regs_read_main(ac97, buffer, idx);
372 }
373 /* select all codecs */
374 snd_ac97_update_bits(ac97, AC97_AD_SERIAL_CFG, 0x7000, 0x7000);
375 } else {
376 snd_ac97_proc_regs_read_main(ac97, buffer, 0);
377 }
378 up(&ac97->page_mutex);
379 }
380
381 void snd_ac97_proc_init(ac97_t * ac97)
382 {
383 snd_info_entry_t *entry;
384 char name[32];
385 const char *prefix;
386
387 if (ac97->bus->proc == NULL)
388 return;
389 prefix = ac97_is_audio(ac97) ? "ac97" : "mc97";
390 sprintf(name, "%s#%d-%d", prefix, ac97->addr, ac97->num);
391 if ((entry = snd_info_create_card_entry(ac97->bus->card, name, ac97->bus->proc)) != NULL) {
392 snd_info_set_text_ops(entry, ac97, 1024, snd_ac97_proc_read);
393 if (snd_info_register(entry) < 0) {
394 snd_info_free_entry(entry);
395 entry = NULL;
396 }
397 }
398 ac97->proc = entry;
399 sprintf(name, "%s#%d-%d+regs", prefix, ac97->addr, ac97->num);
400 if ((entry = snd_info_create_card_entry(ac97->bus->card, name, ac97->bus->proc)) != NULL) {
401 snd_info_set_text_ops(entry, ac97, 1024, snd_ac97_proc_regs_read);
402 #ifdef CONFIG_SND_DEBUG
403 entry->mode |= S_IWUSR;
404 entry->c.text.write_size = 1024;
405 entry->c.text.write = snd_ac97_proc_regs_write;
406 #endif
407 if (snd_info_register(entry) < 0) {
408 snd_info_free_entry(entry);
409 entry = NULL;
410 }
411 }
412 ac97->proc_regs = entry;
413 }
414
415 void snd_ac97_proc_done(ac97_t * ac97)
416 {
417 if (ac97->proc_regs) {
418 snd_info_unregister(ac97->proc_regs);
419 ac97->proc_regs = NULL;
420 }
421 if (ac97->proc) {
422 snd_info_unregister(ac97->proc);
423 ac97->proc = NULL;
424 }
425 }
426
427 void snd_ac97_bus_proc_init(ac97_bus_t * bus)
428 {
429 snd_info_entry_t *entry;
430 char name[32];
431
432 sprintf(name, "codec97#%d", bus->num);
433 if ((entry = snd_info_create_card_entry(bus->card, name, bus->card->proc_root)) != NULL) {
434 entry->mode = S_IFDIR | S_IRUGO | S_IXUGO;
435 if (snd_info_register(entry) < 0) {
436 snd_info_free_entry(entry);
437 entry = NULL;
438 }
439 }
440 bus->proc = entry;
441 }
442
443 void snd_ac97_bus_proc_done(ac97_bus_t * bus)
444 {
445 if (bus->proc) {
446 snd_info_unregister(bus->proc);
447 bus->proc = NULL;
448 }
449 }
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