CoCalc -- ak4531

GitHub Repository: torvalds/linux
Path: blob/master/sound/pci/ak4531_codec.c
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// SPDX-License-Identifier: GPL-2.0-or-later
2
/*
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 *  Copyright (c) by Jaroslav Kysela <[email protected]>
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 *  Universal routines for AK4531 codec
5
 */
6

7
#include <linux/delay.h>
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#include <linux/init.h>
9
#include <linux/slab.h>
10
#include <linux/mutex.h>
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#include <linux/module.h>
12

13
#include <sound/core.h>
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#include <sound/ak4531_codec.h>
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#include <sound/tlv.h>
16

17
/*
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MODULE_AUTHOR("Jaroslav Kysela <[email protected]>");
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MODULE_DESCRIPTION("Universal routines for AK4531 codec");
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MODULE_LICENSE("GPL");
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*/
22

23
static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531);
24

25
/*
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 *
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 */
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++)
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		printk(KERN_DEBUG "ak4531 0x%x: 0x%x\n",
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		       idx, ak4531->regs[idx]);
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}
39

40
#endif
41

42
/*
43
 *
44
 */
45

46
#define AK4531_SINGLE(xname, xindex, reg, shift, mask, invert) \
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
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  .info = snd_ak4531_info_single, \
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  .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
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  .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22) }
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#define AK4531_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv)    \
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
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  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
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  .name = xname, .index = xindex, \
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  .info = snd_ak4531_info_single, \
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  .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
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  .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22), \
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  .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);
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	int reg = kcontrol->private_value & 0xff;
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	int shift = (kcontrol->private_value >> 16) & 0x07;
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	int mask = (kcontrol->private_value >> 24) & 0xff;
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	int invert = (kcontrol->private_value >> 22) & 1;
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	int val;
79

80
	mutex_lock(&ak4531->reg_mutex);
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	val = (ak4531->regs[reg] >> shift) & mask;
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	mutex_unlock(&ak4531->reg_mutex);
83
	if (invert) {
84
		val = mask - val;
85
	}
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	ucontrol->value.integer.value[0] = val;
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	return 0;
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}
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);
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	int reg = kcontrol->private_value & 0xff;
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	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) {
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		val = mask - val;
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	}
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	val <<= shift;
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	mutex_lock(&ak4531->reg_mutex);
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	val = (ak4531->regs[reg] & ~(mask << shift)) | val;
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	change = val != ak4531->regs[reg];
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	ak4531->write(ak4531, reg, ak4531->regs[reg] = val);
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	mutex_unlock(&ak4531->reg_mutex);
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	return change;
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}
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#define AK4531_DOUBLE(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert) \
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
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  .info = snd_ak4531_info_double, \
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  .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
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  .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22) }
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#define AK4531_DOUBLE_TLV(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert, xtlv) \
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
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  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
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  .name = xname, .index = xindex, \
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  .info = snd_ak4531_info_double, \
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  .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
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  .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22), \
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  .tlv = { .p = (xtlv) } }
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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;
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131
	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
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	uinfo->count = 2;
133
	uinfo->value.integer.min = 0;
134
	uinfo->value.integer.max = mask;
135
	return 0;
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}
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);
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	int left_reg = kcontrol->private_value & 0xff;
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	int right_reg = (kcontrol->private_value >> 8) & 0xff;
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	int left_shift = (kcontrol->private_value >> 16) & 0x07;
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	int right_shift = (kcontrol->private_value >> 19) & 0x07;
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	int mask = (kcontrol->private_value >> 24) & 0xff;
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	int invert = (kcontrol->private_value >> 22) & 1;
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	int left, right;
148

149
	mutex_lock(&ak4531->reg_mutex);
150
	left = (ak4531->regs[left_reg] >> left_shift) & mask;
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	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;
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	ucontrol->value.integer.value[1] = right;
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	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);
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	int left_reg = kcontrol->private_value & 0xff;
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	int right_reg = (kcontrol->private_value >> 8) & 0xff;
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	int left_shift = (kcontrol->private_value >> 16) & 0x07;
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	int right_shift = (kcontrol->private_value >> 19) & 0x07;
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	int mask = (kcontrol->private_value >> 24) & 0xff;
170
	int invert = (kcontrol->private_value >> 22) & 1;
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	int change;
172
	int left, right;
173

174
	left = ucontrol->value.integer.value[0] & mask;
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	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;
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		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, \
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  .info = snd_ak4531_info_input_sw, \
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  .get = snd_ak4531_get_input_sw, .put = snd_ak4531_put_input_sw, \
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  .private_value = reg1 | (reg2 << 8) | (left_shift << 16) | (right_shift << 24) }
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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;
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	uinfo->count = 4;
208
	uinfo->value.integer.min = 0;
209
	uinfo->value.integer.max = 1;
210
	return 0;
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}
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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;
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	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);
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	ucontrol->value.integer.value[0] = (ak4531->regs[reg1] >> left_shift) & 1;
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	ucontrol->value.integer.value[1] = (ak4531->regs[reg2] >> left_shift) & 1;
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	ucontrol->value.integer.value[2] = (ak4531->regs[reg1] >> right_shift) & 1;
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	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,
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		  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,
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		  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),
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275
AK4531_DOUBLE("PCM Switch", 1, AK4531_LFM, AK4531_RFM, 7, 7, 1, 1),
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AK4531_DOUBLE_TLV("PCM Volume", 1, AK4531_LFM, AK4531_RFM, 0, 0, 0x1f, 1,
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		  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),
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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),
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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
	strscpy(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

475
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