1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 * Universal routines for AK4531 codec
5 */
6
7 #include <linux/delay.h>
8 #include <linux/init.h>
9 #include <linux/slab.h>
10 #include <linux/mutex.h>
11 #include <linux/module.h>
12
13 #include <sound/core.h>
14 #include <sound/ak4531_codec.h>
15 #include <sound/tlv.h>
16
17 /*
18 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
19 MODULE_DESCRIPTION("Universal routines for AK4531 codec");
20 MODULE_LICENSE("GPL");
21 */
22
23 static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531);
24
25 /*
26 *
27 */
28
29 #if 0
30
31 static void snd_ak4531_dump(struct snd_ak4531 *ak4531)
32 {
33 int idx;
34
35 for (idx = 0; idx < 0x19; idx++)
36 printk(KERN_DEBUG "ak4531 0x%x: 0x%x\n",
37 idx, ak4531->regs[idx]);
38 }
39
40 #endif
41
42 /*
43 *
44 */
45
46 #define AK4531_SINGLE(xname, xindex, reg, shift, mask, invert) \
47 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
48 .info = snd_ak4531_info_single, \
49 .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
50 .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22) }
51 #define AK4531_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv) \
52 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
53 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
54 .name = xname, .index = xindex, \
55 .info = snd_ak4531_info_single, \
56 .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
57 .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22), \
58 .tlv = { .p = (xtlv) } }
59
60 static int snd_ak4531_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
61 {
62 int mask = (kcontrol->private_value >> 24) & 0xff;
63
64 uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
65 uinfo->count = 1;
66 uinfo->value.integer.min = 0;
67 uinfo->value.integer.max = mask;
68 return 0;
69 }
70
71 static int snd_ak4531_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
72 {
73 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
74 int reg = kcontrol->private_value & 0xff;
75 int shift = (kcontrol->private_value >> 16) & 0x07;
76 int mask = (kcontrol->private_value >> 24) & 0xff;
77 int invert = (kcontrol->private_value >> 22) & 1;
78 int val;
79
80 mutex_lock(&ak4531->reg_mutex);
81 val = (ak4531->regs[reg] >> shift) & mask;
82 mutex_unlock(&ak4531->reg_mutex);
83 if (invert) {
84 val = mask - val;
85 }
86 ucontrol->value.integer.value[0] = val;
87 return 0;
88 }
89
90 static int snd_ak4531_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
91 {
92 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
93 int reg = kcontrol->private_value & 0xff;
94 int shift = (kcontrol->private_value >> 16) & 0x07;
95 int mask = (kcontrol->private_value >> 24) & 0xff;
96 int invert = (kcontrol->private_value >> 22) & 1;
97 int change;
98 int val;
99
100 val = ucontrol->value.integer.value[0] & mask;
101 if (invert) {
102 val = mask - val;
103 }
104 val <<= shift;
105 mutex_lock(&ak4531->reg_mutex);
106 val = (ak4531->regs[reg] & ~(mask << shift)) | val;
107 change = val != ak4531->regs[reg];
108 ak4531->write(ak4531, reg, ak4531->regs[reg] = val);
109 mutex_unlock(&ak4531->reg_mutex);
110 return change;
111 }
112
113 #define AK4531_DOUBLE(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert) \
114 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
115 .info = snd_ak4531_info_double, \
116 .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
117 .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22) }
118 #define AK4531_DOUBLE_TLV(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert, xtlv) \
119 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
120 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
121 .name = xname, .index = xindex, \
122 .info = snd_ak4531_info_double, \
123 .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
124 .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22), \
125 .tlv = { .p = (xtlv) } }
126
127 static int snd_ak4531_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
128 {
129 int mask = (kcontrol->private_value >> 24) & 0xff;
130
131 uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
132 uinfo->count = 2;
133 uinfo->value.integer.min = 0;
134 uinfo->value.integer.max = mask;
135 return 0;
136 }
137
138 static int snd_ak4531_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
139 {
140 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
141 int left_reg = kcontrol->private_value & 0xff;
142 int right_reg = (kcontrol->private_value >> 8) & 0xff;
143 int left_shift = (kcontrol->private_value >> 16) & 0x07;
144 int right_shift = (kcontrol->private_value >> 19) & 0x07;
145 int mask = (kcontrol->private_value >> 24) & 0xff;
146 int invert = (kcontrol->private_value >> 22) & 1;
147 int left, right;
148
149 mutex_lock(&ak4531->reg_mutex);
150 left = (ak4531->regs[left_reg] >> left_shift) & mask;
151 right = (ak4531->regs[right_reg] >> right_shift) & mask;
152 mutex_unlock(&ak4531->reg_mutex);
153 if (invert) {
154 left = mask - left;
155 right = mask - right;
156 }
157 ucontrol->value.integer.value[0] = left;
158 ucontrol->value.integer.value[1] = right;
159 return 0;
160 }
161
162 static int snd_ak4531_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
163 {
164 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
165 int left_reg = kcontrol->private_value & 0xff;
166 int right_reg = (kcontrol->private_value >> 8) & 0xff;
167 int left_shift = (kcontrol->private_value >> 16) & 0x07;
168 int right_shift = (kcontrol->private_value >> 19) & 0x07;
169 int mask = (kcontrol->private_value >> 24) & 0xff;
170 int invert = (kcontrol->private_value >> 22) & 1;
171 int change;
172 int left, right;
173
174 left = ucontrol->value.integer.value[0] & mask;
175 right = ucontrol->value.integer.value[1] & mask;
176 if (invert) {
177 left = mask - left;
178 right = mask - right;
179 }
180 left <<= left_shift;
181 right <<= right_shift;
182 mutex_lock(&ak4531->reg_mutex);
183 if (left_reg == right_reg) {
184 left = (ak4531->regs[left_reg] & ~((mask << left_shift) | (mask << right_shift))) | left | right;
185 change = left != ak4531->regs[left_reg];
186 ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
187 } else {
188 left = (ak4531->regs[left_reg] & ~(mask << left_shift)) | left;
189 right = (ak4531->regs[right_reg] & ~(mask << right_shift)) | right;
190 change = left != ak4531->regs[left_reg] || right != ak4531->regs[right_reg];
191 ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
192 ak4531->write(ak4531, right_reg, ak4531->regs[right_reg] = right);
193 }
194 mutex_unlock(&ak4531->reg_mutex);
195 return change;
196 }
197
198 #define AK4531_INPUT_SW(xname, xindex, reg1, reg2, left_shift, right_shift) \
199 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
200 .info = snd_ak4531_info_input_sw, \
201 .get = snd_ak4531_get_input_sw, .put = snd_ak4531_put_input_sw, \
202 .private_value = reg1 | (reg2 << 8) | (left_shift << 16) | (right_shift << 24) }
203
204 static int snd_ak4531_info_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
205 {
206 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
207 uinfo->count = 4;
208 uinfo->value.integer.min = 0;
209 uinfo->value.integer.max = 1;
210 return 0;
211 }
212
213 static int snd_ak4531_get_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
214 {
215 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
216 int reg1 = kcontrol->private_value & 0xff;
217 int reg2 = (kcontrol->private_value >> 8) & 0xff;
218 int left_shift = (kcontrol->private_value >> 16) & 0x0f;
219 int right_shift = (kcontrol->private_value >> 24) & 0x0f;
220
221 mutex_lock(&ak4531->reg_mutex);
222 ucontrol->value.integer.value[0] = (ak4531->regs[reg1] >> left_shift) & 1;
223 ucontrol->value.integer.value[1] = (ak4531->regs[reg2] >> left_shift) & 1;
224 ucontrol->value.integer.value[2] = (ak4531->regs[reg1] >> right_shift) & 1;
225 ucontrol->value.integer.value[3] = (ak4531->regs[reg2] >> right_shift) & 1;
226 mutex_unlock(&ak4531->reg_mutex);
227 return 0;
228 }
229
230 static int snd_ak4531_put_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
231 {
232 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
233 int reg1 = kcontrol->private_value & 0xff;
234 int reg2 = (kcontrol->private_value >> 8) & 0xff;
235 int left_shift = (kcontrol->private_value >> 16) & 0x0f;
236 int right_shift = (kcontrol->private_value >> 24) & 0x0f;
237 int change;
238 int val1, val2;
239
240 mutex_lock(&ak4531->reg_mutex);
241 val1 = ak4531->regs[reg1] & ~((1 << left_shift) | (1 << right_shift));
242 val2 = ak4531->regs[reg2] & ~((1 << left_shift) | (1 << right_shift));
243 val1 |= (ucontrol->value.integer.value[0] & 1) << left_shift;
244 val2 |= (ucontrol->value.integer.value[1] & 1) << left_shift;
245 val1 |= (ucontrol->value.integer.value[2] & 1) << right_shift;
246 val2 |= (ucontrol->value.integer.value[3] & 1) << right_shift;
247 change = val1 != ak4531->regs[reg1] || val2 != ak4531->regs[reg2];
248 ak4531->write(ak4531, reg1, ak4531->regs[reg1] = val1);
249 ak4531->write(ak4531, reg2, ak4531->regs[reg2] = val2);
250 mutex_unlock(&ak4531->reg_mutex);
251 return change;
252 }
253
254 static const DECLARE_TLV_DB_SCALE(db_scale_master, -6200, 200, 0);
255 static const DECLARE_TLV_DB_SCALE(db_scale_mono, -2800, 400, 0);
256 static const DECLARE_TLV_DB_SCALE(db_scale_input, -5000, 200, 0);
257
258 static const struct snd_kcontrol_new snd_ak4531_controls[] = {
259
260 AK4531_DOUBLE_TLV("Master Playback Switch", 0,
261 AK4531_LMASTER, AK4531_RMASTER, 7, 7, 1, 1,
262 db_scale_master),
263 AK4531_DOUBLE("Master Playback Volume", 0, AK4531_LMASTER, AK4531_RMASTER, 0, 0, 0x1f, 1),
264
265 AK4531_SINGLE_TLV("Master Mono Playback Switch", 0, AK4531_MONO_OUT, 7, 1, 1,
266 db_scale_mono),
267 AK4531_SINGLE("Master Mono Playback Volume", 0, AK4531_MONO_OUT, 0, 0x07, 1),
268
269 AK4531_DOUBLE("PCM Switch", 0, AK4531_LVOICE, AK4531_RVOICE, 7, 7, 1, 1),
270 AK4531_DOUBLE_TLV("PCM Volume", 0, AK4531_LVOICE, AK4531_RVOICE, 0, 0, 0x1f, 1,
271 db_scale_input),
272 AK4531_DOUBLE("PCM Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 3, 2, 1, 0),
273 AK4531_DOUBLE("PCM Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 2, 2, 1, 0),
274
275 AK4531_DOUBLE("PCM Switch", 1, AK4531_LFM, AK4531_RFM, 7, 7, 1, 1),
276 AK4531_DOUBLE_TLV("PCM Volume", 1, AK4531_LFM, AK4531_RFM, 0, 0, 0x1f, 1,
277 db_scale_input),
278 AK4531_DOUBLE("PCM Playback Switch", 1, AK4531_OUT_SW1, AK4531_OUT_SW1, 6, 5, 1, 0),
279 AK4531_INPUT_SW("PCM Capture Route", 1, AK4531_LIN_SW1, AK4531_RIN_SW1, 6, 5),
280
281 AK4531_DOUBLE("CD Switch", 0, AK4531_LCD, AK4531_RCD, 7, 7, 1, 1),
282 AK4531_DOUBLE_TLV("CD Volume", 0, AK4531_LCD, AK4531_RCD, 0, 0, 0x1f, 1,
283 db_scale_input),
284 AK4531_DOUBLE("CD Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 2, 1, 1, 0),
285 AK4531_INPUT_SW("CD Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 2, 1),
286
287 AK4531_DOUBLE("Line Switch", 0, AK4531_LLINE, AK4531_RLINE, 7, 7, 1, 1),
288 AK4531_DOUBLE_TLV("Line Volume", 0, AK4531_LLINE, AK4531_RLINE, 0, 0, 0x1f, 1,
289 db_scale_input),
290 AK4531_DOUBLE("Line Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 4, 3, 1, 0),
291 AK4531_INPUT_SW("Line Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 4, 3),
292
293 AK4531_DOUBLE("Aux Switch", 0, AK4531_LAUXA, AK4531_RAUXA, 7, 7, 1, 1),
294 AK4531_DOUBLE_TLV("Aux Volume", 0, AK4531_LAUXA, AK4531_RAUXA, 0, 0, 0x1f, 1,
295 db_scale_input),
296 AK4531_DOUBLE("Aux Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 5, 4, 1, 0),
297 AK4531_INPUT_SW("Aux Capture Route", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 4, 3),
298
299 AK4531_SINGLE("Mono Switch", 0, AK4531_MONO1, 7, 1, 1),
300 AK4531_SINGLE_TLV("Mono Volume", 0, AK4531_MONO1, 0, 0x1f, 1, db_scale_input),
301 AK4531_SINGLE("Mono Playback Switch", 0, AK4531_OUT_SW2, 0, 1, 0),
302 AK4531_DOUBLE("Mono Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 0, 0, 1, 0),
303
304 AK4531_SINGLE("Mono Switch", 1, AK4531_MONO2, 7, 1, 1),
305 AK4531_SINGLE_TLV("Mono Volume", 1, AK4531_MONO2, 0, 0x1f, 1, db_scale_input),
306 AK4531_SINGLE("Mono Playback Switch", 1, AK4531_OUT_SW2, 1, 1, 0),
307 AK4531_DOUBLE("Mono Capture Switch", 1, AK4531_LIN_SW2, AK4531_RIN_SW2, 1, 1, 1, 0),
308
309 AK4531_SINGLE_TLV("Mic Volume", 0, AK4531_MIC, 0, 0x1f, 1, db_scale_input),
310 AK4531_SINGLE("Mic Switch", 0, AK4531_MIC, 7, 1, 1),
311 AK4531_SINGLE("Mic Playback Switch", 0, AK4531_OUT_SW1, 0, 1, 0),
312 AK4531_DOUBLE("Mic Capture Switch", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 0, 0, 1, 0),
313
314 AK4531_DOUBLE("Mic Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 7, 7, 1, 0),
315 AK4531_DOUBLE("Mono1 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 6, 6, 1, 0),
316 AK4531_DOUBLE("Mono2 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 5, 5, 1, 0),
317
318 AK4531_SINGLE("AD Input Select", 0, AK4531_AD_IN, 0, 1, 0),
319 AK4531_SINGLE("Mic Boost (+30dB)", 0, AK4531_MIC_GAIN, 0, 1, 0)
320 };
321
322 static int snd_ak4531_free(struct snd_ak4531 *ak4531)
323 {
324 if (ak4531) {
325 if (ak4531->private_free)
326 ak4531->private_free(ak4531);
327 kfree(ak4531);
328 }
329 return 0;
330 }
331
332 static int snd_ak4531_dev_free(struct snd_device *device)
333 {
334 struct snd_ak4531 *ak4531 = device->device_data;
335 return snd_ak4531_free(ak4531);
336 }
337
338 static const u8 snd_ak4531_initial_map[0x19 + 1] = {
339 0x9f, /* 00: Master Volume Lch */
340 0x9f, /* 01: Master Volume Rch */
341 0x9f, /* 02: Voice Volume Lch */
342 0x9f, /* 03: Voice Volume Rch */
343 0x9f, /* 04: FM Volume Lch */
344 0x9f, /* 05: FM Volume Rch */
345 0x9f, /* 06: CD Audio Volume Lch */
346 0x9f, /* 07: CD Audio Volume Rch */
347 0x9f, /* 08: Line Volume Lch */
348 0x9f, /* 09: Line Volume Rch */
349 0x9f, /* 0a: Aux Volume Lch */
350 0x9f, /* 0b: Aux Volume Rch */
351 0x9f, /* 0c: Mono1 Volume */
352 0x9f, /* 0d: Mono2 Volume */
353 0x9f, /* 0e: Mic Volume */
354 0x87, /* 0f: Mono-out Volume */
355 0x00, /* 10: Output Mixer SW1 */
356 0x00, /* 11: Output Mixer SW2 */
357 0x00, /* 12: Lch Input Mixer SW1 */
358 0x00, /* 13: Rch Input Mixer SW1 */
359 0x00, /* 14: Lch Input Mixer SW2 */
360 0x00, /* 15: Rch Input Mixer SW2 */
361 0x00, /* 16: Reset & Power Down */
362 0x00, /* 17: Clock Select */
363 0x00, /* 18: AD Input Select */
364 0x01 /* 19: Mic Amp Setup */
365 };
366
367 int snd_ak4531_mixer(struct snd_card *card,
368 struct snd_ak4531 *_ak4531,
369 struct snd_ak4531 **rak4531)
370 {
371 unsigned int idx;
372 int err;
373 struct snd_ak4531 *ak4531;
374 static const struct snd_device_ops ops = {
375 .dev_free = snd_ak4531_dev_free,
376 };
377
378 if (snd_BUG_ON(!card || !_ak4531))
379 return -EINVAL;
380 if (rak4531)
381 *rak4531 = NULL;
382 ak4531 = kzalloc(sizeof(*ak4531), GFP_KERNEL);
383 if (ak4531 == NULL)
384 return -ENOMEM;
385 *ak4531 = *_ak4531;
386 mutex_init(&ak4531->reg_mutex);
387 err = snd_component_add(card, "AK4531");
388 if (err < 0) {
389 snd_ak4531_free(ak4531);
390 return err;
391 }
392 strcpy(card->mixername, "Asahi Kasei AK4531");
393 ak4531->write(ak4531, AK4531_RESET, 0x03); /* no RST, PD */
394 udelay(100);
395 ak4531->write(ak4531, AK4531_CLOCK, 0x00); /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */
396 for (idx = 0; idx <= 0x19; idx++) {
397 if (idx == AK4531_RESET || idx == AK4531_CLOCK)
398 continue;
399 ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]); /* recording source is mixer */
400 }
401 for (idx = 0; idx < ARRAY_SIZE(snd_ak4531_controls); idx++) {
402 err = snd_ctl_add(card, snd_ctl_new1(&snd_ak4531_controls[idx], ak4531));
403 if (err < 0) {
404 snd_ak4531_free(ak4531);
405 return err;
406 }
407 }
408 snd_ak4531_proc_init(card, ak4531);
409 err = snd_device_new(card, SNDRV_DEV_CODEC, ak4531, &ops);
410 if (err < 0) {
411 snd_ak4531_free(ak4531);
412 return err;
413 }
414
415 #if 0
416 snd_ak4531_dump(ak4531);
417 #endif
418 if (rak4531)
419 *rak4531 = ak4531;
420 return 0;
421 }
422
423 /*
424 * power management
425 */
426 #ifdef CONFIG_PM
427 void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
428 {
429 /* mute */
430 ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
431 ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
432 /* powerdown */
433 ak4531->write(ak4531, AK4531_RESET, 0x01);
434 }
435
436 void snd_ak4531_resume(struct snd_ak4531 *ak4531)
437 {
438 int idx;
439
440 /* initialize */
441 ak4531->write(ak4531, AK4531_RESET, 0x03);
442 udelay(100);
443 ak4531->write(ak4531, AK4531_CLOCK, 0x00);
444 /* restore mixer registers */
445 for (idx = 0; idx <= 0x19; idx++) {
446 if (idx == AK4531_RESET || idx == AK4531_CLOCK)
447 continue;
448 ak4531->write(ak4531, idx, ak4531->regs[idx]);
449 }
450 }
451 #endif
452
453 /*
454 * /proc interface
455 */
456
457 static void snd_ak4531_proc_read(struct snd_info_entry *entry,
458 struct snd_info_buffer *buffer)
459 {
460 struct snd_ak4531 *ak4531 = entry->private_data;
461
462 snd_iprintf(buffer, "Asahi Kasei AK4531\n\n");
463 snd_iprintf(buffer, "Recording source : %s\n"
464 "MIC gain : %s\n",
465 ak4531->regs[AK4531_AD_IN] & 1 ? "external" : "mixer",
466 ak4531->regs[AK4531_MIC_GAIN] & 1 ? "+30dB" : "+0dB");
467 }
468
469 static void
470 snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531)
471 {
472 snd_card_ro_proc_new(card, "ak4531", ak4531, snd_ak4531_proc_read);
473 }
474
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