1 /*
2 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
3 * Universal routines for AK4531 codec
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <linux/delay.h>
23 #include <linux/init.h>
24 #include <linux/slab.h>
25 #include <linux/mutex.h>
26
27 #include <sound/core.h>
28 #include <sound/ak4531_codec.h>
29 #include <sound/tlv.h>
30
31 /*
32 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
33 MODULE_DESCRIPTION("Universal routines for AK4531 codec");
34 MODULE_LICENSE("GPL");
35 */
36
37 #ifdef CONFIG_PROC_FS
38 static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531);
39 #else
40 #define snd_ak4531_proc_init(card,ak)
41 #endif
42
43 /*
44 *
45 */
46
47 #if 0
48
49 static void snd_ak4531_dump(struct snd_ak4531 *ak4531)
50 {
51 int idx;
52
53 for (idx = 0; idx < 0x19; idx++)
54 printk(KERN_DEBUG "ak4531 0x%x: 0x%x\n",
55 idx, ak4531->regs[idx]);
56 }
57
58 #endif
59
60 /*
61 *
62 */
63
64 #define AK4531_SINGLE(xname, xindex, reg, shift, mask, invert) \
65 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
66 .info = snd_ak4531_info_single, \
67 .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
68 .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22) }
69 #define AK4531_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv) \
70 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
71 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
72 .name = xname, .index = xindex, \
73 .info = snd_ak4531_info_single, \
74 .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
75 .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22), \
76 .tlv = { .p = (xtlv) } }
77
78 static int snd_ak4531_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
79 {
80 int mask = (kcontrol->private_value >> 24) & 0xff;
81
82 uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
83 uinfo->count = 1;
84 uinfo->value.integer.min = 0;
85 uinfo->value.integer.max = mask;
86 return 0;
87 }
88
89 static int snd_ak4531_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
90 {
91 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
92 int reg = kcontrol->private_value & 0xff;
93 int shift = (kcontrol->private_value >> 16) & 0x07;
94 int mask = (kcontrol->private_value >> 24) & 0xff;
95 int invert = (kcontrol->private_value >> 22) & 1;
96 int val;
97
98 mutex_lock(&ak4531->reg_mutex);
99 val = (ak4531->regs[reg] >> shift) & mask;
100 mutex_unlock(&ak4531->reg_mutex);
101 if (invert) {
102 val = mask - val;
103 }
104 ucontrol->value.integer.value[0] = val;
105 return 0;
106 }
107
108 static int snd_ak4531_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
109 {
110 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
111 int reg = kcontrol->private_value & 0xff;
112 int shift = (kcontrol->private_value >> 16) & 0x07;
113 int mask = (kcontrol->private_value >> 24) & 0xff;
114 int invert = (kcontrol->private_value >> 22) & 1;
115 int change;
116 int val;
117
118 val = ucontrol->value.integer.value[0] & mask;
119 if (invert) {
120 val = mask - val;
121 }
122 val <<= shift;
123 mutex_lock(&ak4531->reg_mutex);
124 val = (ak4531->regs[reg] & ~(mask << shift)) | val;
125 change = val != ak4531->regs[reg];
126 ak4531->write(ak4531, reg, ak4531->regs[reg] = val);
127 mutex_unlock(&ak4531->reg_mutex);
128 return change;
129 }
130
131 #define AK4531_DOUBLE(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert) \
132 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
133 .info = snd_ak4531_info_double, \
134 .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
135 .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22) }
136 #define AK4531_DOUBLE_TLV(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert, xtlv) \
137 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
138 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
139 .name = xname, .index = xindex, \
140 .info = snd_ak4531_info_double, \
141 .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
142 .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22), \
143 .tlv = { .p = (xtlv) } }
144
145 static int snd_ak4531_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
146 {
147 int mask = (kcontrol->private_value >> 24) & 0xff;
148
149 uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
150 uinfo->count = 2;
151 uinfo->value.integer.min = 0;
152 uinfo->value.integer.max = mask;
153 return 0;
154 }
155
156 static int snd_ak4531_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
157 {
158 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
159 int left_reg = kcontrol->private_value & 0xff;
160 int right_reg = (kcontrol->private_value >> 8) & 0xff;
161 int left_shift = (kcontrol->private_value >> 16) & 0x07;
162 int right_shift = (kcontrol->private_value >> 19) & 0x07;
163 int mask = (kcontrol->private_value >> 24) & 0xff;
164 int invert = (kcontrol->private_value >> 22) & 1;
165 int left, right;
166
167 mutex_lock(&ak4531->reg_mutex);
168 left = (ak4531->regs[left_reg] >> left_shift) & mask;
169 right = (ak4531->regs[right_reg] >> right_shift) & mask;
170 mutex_unlock(&ak4531->reg_mutex);
171 if (invert) {
172 left = mask - left;
173 right = mask - right;
174 }
175 ucontrol->value.integer.value[0] = left;
176 ucontrol->value.integer.value[1] = right;
177 return 0;
178 }
179
180 static int snd_ak4531_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
181 {
182 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
183 int left_reg = kcontrol->private_value & 0xff;
184 int right_reg = (kcontrol->private_value >> 8) & 0xff;
185 int left_shift = (kcontrol->private_value >> 16) & 0x07;
186 int right_shift = (kcontrol->private_value >> 19) & 0x07;
187 int mask = (kcontrol->private_value >> 24) & 0xff;
188 int invert = (kcontrol->private_value >> 22) & 1;
189 int change;
190 int left, right;
191
192 left = ucontrol->value.integer.value[0] & mask;
193 right = ucontrol->value.integer.value[1] & mask;
194 if (invert) {
195 left = mask - left;
196 right = mask - right;
197 }
198 left <<= left_shift;
199 right <<= right_shift;
200 mutex_lock(&ak4531->reg_mutex);
201 if (left_reg == right_reg) {
202 left = (ak4531->regs[left_reg] & ~((mask << left_shift) | (mask << right_shift))) | left | right;
203 change = left != ak4531->regs[left_reg];
204 ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
205 } else {
206 left = (ak4531->regs[left_reg] & ~(mask << left_shift)) | left;
207 right = (ak4531->regs[right_reg] & ~(mask << right_shift)) | right;
208 change = left != ak4531->regs[left_reg] || right != ak4531->regs[right_reg];
209 ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
210 ak4531->write(ak4531, right_reg, ak4531->regs[right_reg] = right);
211 }
212 mutex_unlock(&ak4531->reg_mutex);
213 return change;
214 }
215
216 #define AK4531_INPUT_SW(xname, xindex, reg1, reg2, left_shift, right_shift) \
217 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
218 .info = snd_ak4531_info_input_sw, \
219 .get = snd_ak4531_get_input_sw, .put = snd_ak4531_put_input_sw, \
220 .private_value = reg1 | (reg2 << 8) | (left_shift << 16) | (right_shift << 24) }
221
222 static int snd_ak4531_info_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
223 {
224 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
225 uinfo->count = 4;
226 uinfo->value.integer.min = 0;
227 uinfo->value.integer.max = 1;
228 return 0;
229 }
230
231 static int snd_ak4531_get_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
232 {
233 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
234 int reg1 = kcontrol->private_value & 0xff;
235 int reg2 = (kcontrol->private_value >> 8) & 0xff;
236 int left_shift = (kcontrol->private_value >> 16) & 0x0f;
237 int right_shift = (kcontrol->private_value >> 24) & 0x0f;
238
239 mutex_lock(&ak4531->reg_mutex);
240 ucontrol->value.integer.value[0] = (ak4531->regs[reg1] >> left_shift) & 1;
241 ucontrol->value.integer.value[1] = (ak4531->regs[reg2] >> left_shift) & 1;
242 ucontrol->value.integer.value[2] = (ak4531->regs[reg1] >> right_shift) & 1;
243 ucontrol->value.integer.value[3] = (ak4531->regs[reg2] >> right_shift) & 1;
244 mutex_unlock(&ak4531->reg_mutex);
245 return 0;
246 }
247
248 static int snd_ak4531_put_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
249 {
250 struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
251 int reg1 = kcontrol->private_value & 0xff;
252 int reg2 = (kcontrol->private_value >> 8) & 0xff;
253 int left_shift = (kcontrol->private_value >> 16) & 0x0f;
254 int right_shift = (kcontrol->private_value >> 24) & 0x0f;
255 int change;
256 int val1, val2;
257
258 mutex_lock(&ak4531->reg_mutex);
259 val1 = ak4531->regs[reg1] & ~((1 << left_shift) | (1 << right_shift));
260 val2 = ak4531->regs[reg2] & ~((1 << left_shift) | (1 << right_shift));
261 val1 |= (ucontrol->value.integer.value[0] & 1) << left_shift;
262 val2 |= (ucontrol->value.integer.value[1] & 1) << left_shift;
263 val1 |= (ucontrol->value.integer.value[2] & 1) << right_shift;
264 val2 |= (ucontrol->value.integer.value[3] & 1) << right_shift;
265 change = val1 != ak4531->regs[reg1] || val2 != ak4531->regs[reg2];
266 ak4531->write(ak4531, reg1, ak4531->regs[reg1] = val1);
267 ak4531->write(ak4531, reg2, ak4531->regs[reg2] = val2);
268 mutex_unlock(&ak4531->reg_mutex);
269 return change;
270 }
271
272 static const DECLARE_TLV_DB_SCALE(db_scale_master, -6200, 200, 0);
273 static const DECLARE_TLV_DB_SCALE(db_scale_mono, -2800, 400, 0);
274 static const DECLARE_TLV_DB_SCALE(db_scale_input, -5000, 200, 0);
275
276 static struct snd_kcontrol_new snd_ak4531_controls[] __devinitdata = {
277
278 AK4531_DOUBLE_TLV("Master Playback Switch", 0,
279 AK4531_LMASTER, AK4531_RMASTER, 7, 7, 1, 1,
280 db_scale_master),
281 AK4531_DOUBLE("Master Playback Volume", 0, AK4531_LMASTER, AK4531_RMASTER, 0, 0, 0x1f, 1),
282
283 AK4531_SINGLE_TLV("Master Mono Playback Switch", 0, AK4531_MONO_OUT, 7, 1, 1,
284 db_scale_mono),
285 AK4531_SINGLE("Master Mono Playback Volume", 0, AK4531_MONO_OUT, 0, 0x07, 1),
286
287 AK4531_DOUBLE("PCM Switch", 0, AK4531_LVOICE, AK4531_RVOICE, 7, 7, 1, 1),
288 AK4531_DOUBLE_TLV("PCM Volume", 0, AK4531_LVOICE, AK4531_RVOICE, 0, 0, 0x1f, 1,
289 db_scale_input),
290 AK4531_DOUBLE("PCM Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 3, 2, 1, 0),
291 AK4531_DOUBLE("PCM Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 2, 2, 1, 0),
292
293 AK4531_DOUBLE("PCM Switch", 1, AK4531_LFM, AK4531_RFM, 7, 7, 1, 1),
294 AK4531_DOUBLE_TLV("PCM Volume", 1, AK4531_LFM, AK4531_RFM, 0, 0, 0x1f, 1,
295 db_scale_input),
296 AK4531_DOUBLE("PCM Playback Switch", 1, AK4531_OUT_SW1, AK4531_OUT_SW1, 6, 5, 1, 0),
297 AK4531_INPUT_SW("PCM Capture Route", 1, AK4531_LIN_SW1, AK4531_RIN_SW1, 6, 5),
298
299 AK4531_DOUBLE("CD Switch", 0, AK4531_LCD, AK4531_RCD, 7, 7, 1, 1),
300 AK4531_DOUBLE_TLV("CD Volume", 0, AK4531_LCD, AK4531_RCD, 0, 0, 0x1f, 1,
301 db_scale_input),
302 AK4531_DOUBLE("CD Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 2, 1, 1, 0),
303 AK4531_INPUT_SW("CD Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 2, 1),
304
305 AK4531_DOUBLE("Line Switch", 0, AK4531_LLINE, AK4531_RLINE, 7, 7, 1, 1),
306 AK4531_DOUBLE_TLV("Line Volume", 0, AK4531_LLINE, AK4531_RLINE, 0, 0, 0x1f, 1,
307 db_scale_input),
308 AK4531_DOUBLE("Line Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 4, 3, 1, 0),
309 AK4531_INPUT_SW("Line Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 4, 3),
310
311 AK4531_DOUBLE("Aux Switch", 0, AK4531_LAUXA, AK4531_RAUXA, 7, 7, 1, 1),
312 AK4531_DOUBLE_TLV("Aux Volume", 0, AK4531_LAUXA, AK4531_RAUXA, 0, 0, 0x1f, 1,
313 db_scale_input),
314 AK4531_DOUBLE("Aux Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 5, 4, 1, 0),
315 AK4531_INPUT_SW("Aux Capture Route", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 4, 3),
316
317 AK4531_SINGLE("Mono Switch", 0, AK4531_MONO1, 7, 1, 1),
318 AK4531_SINGLE_TLV("Mono Volume", 0, AK4531_MONO1, 0, 0x1f, 1, db_scale_input),
319 AK4531_SINGLE("Mono Playback Switch", 0, AK4531_OUT_SW2, 0, 1, 0),
320 AK4531_DOUBLE("Mono Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 0, 0, 1, 0),
321
322 AK4531_SINGLE("Mono Switch", 1, AK4531_MONO2, 7, 1, 1),
323 AK4531_SINGLE_TLV("Mono Volume", 1, AK4531_MONO2, 0, 0x1f, 1, db_scale_input),
324 AK4531_SINGLE("Mono Playback Switch", 1, AK4531_OUT_SW2, 1, 1, 0),
325 AK4531_DOUBLE("Mono Capture Switch", 1, AK4531_LIN_SW2, AK4531_RIN_SW2, 1, 1, 1, 0),
326
327 AK4531_SINGLE_TLV("Mic Volume", 0, AK4531_MIC, 0, 0x1f, 1, db_scale_input),
328 AK4531_SINGLE("Mic Switch", 0, AK4531_MIC, 7, 1, 1),
329 AK4531_SINGLE("Mic Playback Switch", 0, AK4531_OUT_SW1, 0, 1, 0),
330 AK4531_DOUBLE("Mic Capture Switch", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 0, 0, 1, 0),
331
332 AK4531_DOUBLE("Mic Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 7, 7, 1, 0),
333 AK4531_DOUBLE("Mono1 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 6, 6, 1, 0),
334 AK4531_DOUBLE("Mono2 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 5, 5, 1, 0),
335
336 AK4531_SINGLE("AD Input Select", 0, AK4531_AD_IN, 0, 1, 0),
337 AK4531_SINGLE("Mic Boost (+30dB)", 0, AK4531_MIC_GAIN, 0, 1, 0)
338 };
339
340 static int snd_ak4531_free(struct snd_ak4531 *ak4531)
341 {
342 if (ak4531) {
343 if (ak4531->private_free)
344 ak4531->private_free(ak4531);
345 kfree(ak4531);
346 }
347 return 0;
348 }
349
350 static int snd_ak4531_dev_free(struct snd_device *device)
351 {
352 struct snd_ak4531 *ak4531 = device->device_data;
353 return snd_ak4531_free(ak4531);
354 }
355
356 static u8 snd_ak4531_initial_map[0x19 + 1] = {
357 0x9f, /* 00: Master Volume Lch */
358 0x9f, /* 01: Master Volume Rch */
359 0x9f, /* 02: Voice Volume Lch */
360 0x9f, /* 03: Voice Volume Rch */
361 0x9f, /* 04: FM Volume Lch */
362 0x9f, /* 05: FM Volume Rch */
363 0x9f, /* 06: CD Audio Volume Lch */
364 0x9f, /* 07: CD Audio Volume Rch */
365 0x9f, /* 08: Line Volume Lch */
366 0x9f, /* 09: Line Volume Rch */
367 0x9f, /* 0a: Aux Volume Lch */
368 0x9f, /* 0b: Aux Volume Rch */
369 0x9f, /* 0c: Mono1 Volume */
370 0x9f, /* 0d: Mono2 Volume */
371 0x9f, /* 0e: Mic Volume */
372 0x87, /* 0f: Mono-out Volume */
373 0x00, /* 10: Output Mixer SW1 */
374 0x00, /* 11: Output Mixer SW2 */
375 0x00, /* 12: Lch Input Mixer SW1 */
376 0x00, /* 13: Rch Input Mixer SW1 */
377 0x00, /* 14: Lch Input Mixer SW2 */
378 0x00, /* 15: Rch Input Mixer SW2 */
379 0x00, /* 16: Reset & Power Down */
380 0x00, /* 17: Clock Select */
381 0x00, /* 18: AD Input Select */
382 0x01 /* 19: Mic Amp Setup */
383 };
384
385 int __devinit snd_ak4531_mixer(struct snd_card *card,
386 struct snd_ak4531 *_ak4531,
387 struct snd_ak4531 **rak4531)
388 {
389 unsigned int idx;
390 int err;
391 struct snd_ak4531 *ak4531;
392 static struct snd_device_ops ops = {
393 .dev_free = snd_ak4531_dev_free,
394 };
395
396 if (snd_BUG_ON(!card || !_ak4531))
397 return -EINVAL;
398 if (rak4531)
399 *rak4531 = NULL;
400 ak4531 = kzalloc(sizeof(*ak4531), GFP_KERNEL);
401 if (ak4531 == NULL)
402 return -ENOMEM;
403 *ak4531 = *_ak4531;
404 mutex_init(&ak4531->reg_mutex);
405 if ((err = snd_component_add(card, "AK4531")) < 0) {
406 snd_ak4531_free(ak4531);
407 return err;
408 }
409 strcpy(card->mixername, "Asahi Kasei AK4531");
410 ak4531->write(ak4531, AK4531_RESET, 0x03); /* no RST, PD */
411 udelay(100);
412 ak4531->write(ak4531, AK4531_CLOCK, 0x00); /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */
413 for (idx = 0; idx <= 0x19; idx++) {
414 if (idx == AK4531_RESET || idx == AK4531_CLOCK)
415 continue;
416 ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]); /* recording source is mixer */
417 }
418 for (idx = 0; idx < ARRAY_SIZE(snd_ak4531_controls); idx++) {
419 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_ak4531_controls[idx], ak4531))) < 0) {
420 snd_ak4531_free(ak4531);
421 return err;
422 }
423 }
424 snd_ak4531_proc_init(card, ak4531);
425 if ((err = snd_device_new(card, SNDRV_DEV_CODEC, ak4531, &ops)) < 0) {
426 snd_ak4531_free(ak4531);
427 return err;
428 }
429
430 #if 0
431 snd_ak4531_dump(ak4531);
432 #endif
433 if (rak4531)
434 *rak4531 = ak4531;
435 return 0;
436 }
437
438 /*
439 * power management
440 */
441 #ifdef CONFIG_PM
442 void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
443 {
444 /* mute */
445 ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
446 ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
447 /* powerdown */
448 ak4531->write(ak4531, AK4531_RESET, 0x01);
449 }
450
451 void snd_ak4531_resume(struct snd_ak4531 *ak4531)
452 {
453 int idx;
454
455 /* initialize */
456 ak4531->write(ak4531, AK4531_RESET, 0x03);
457 udelay(100);
458 ak4531->write(ak4531, AK4531_CLOCK, 0x00);
459 /* restore mixer registers */
460 for (idx = 0; idx <= 0x19; idx++) {
461 if (idx == AK4531_RESET || idx == AK4531_CLOCK)
462 continue;
463 ak4531->write(ak4531, idx, ak4531->regs[idx]);
464 }
465 }
466 #endif
467
468 #ifdef CONFIG_PROC_FS
469 /*
470 * /proc interface
471 */
472
473 static void snd_ak4531_proc_read(struct snd_info_entry *entry,
474 struct snd_info_buffer *buffer)
475 {
476 struct snd_ak4531 *ak4531 = entry->private_data;
477
478 snd_iprintf(buffer, "Asahi Kasei AK4531\n\n");
479 snd_iprintf(buffer, "Recording source : %s\n"
480 "MIC gain : %s\n",
481 ak4531->regs[AK4531_AD_IN] & 1 ? "external" : "mixer",
482 ak4531->regs[AK4531_MIC_GAIN] & 1 ? "+30dB" : "+0dB");
483 }
484
485 static void __devinit
486 snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531)
487 {
488 struct snd_info_entry *entry;
489
490 if (! snd_card_proc_new(card, "ak4531", &entry))
491 snd_info_set_text_ops(entry, ak4531, snd_ak4531_proc_read);
492 }
493 #endif
494
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