linux/sound/pci/ak4531_codec.c
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   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/*
  32MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  33MODULE_DESCRIPTION("Universal routines for AK4531 codec");
  34MODULE_LICENSE("GPL");
  35*/
  36
  37#ifdef CONFIG_PROC_FS
  38static 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
  49static void snd_ak4531_dump(struct snd_ak4531 *ak4531)
  50{
  51        int idx;
  52        
  53        for (idx = 0; idx < 0x19; idx++)
  54                printk("ak4531 0x%x: 0x%x\n", idx, ak4531->regs[idx]);
  55}
  56
  57#endif
  58
  59/*
  60 *
  61 */
  62
  63#define AK4531_SINGLE(xname, xindex, reg, shift, mask, invert) \
  64{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  65  .info = snd_ak4531_info_single, \
  66  .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
  67  .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22) }
  68#define AK4531_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv)    \
  69{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
  70  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
  71  .name = xname, .index = xindex, \
  72  .info = snd_ak4531_info_single, \
  73  .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
  74  .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22), \
  75  .tlv = { .p = (xtlv) } }
  76
  77static int snd_ak4531_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
  78{
  79        int mask = (kcontrol->private_value >> 24) & 0xff;
  80
  81        uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
  82        uinfo->count = 1;
  83        uinfo->value.integer.min = 0;
  84        uinfo->value.integer.max = mask;
  85        return 0;
  86}
  87 
  88static int snd_ak4531_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
  89{
  90        struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
  91        int reg = kcontrol->private_value & 0xff;
  92        int shift = (kcontrol->private_value >> 16) & 0x07;
  93        int mask = (kcontrol->private_value >> 24) & 0xff;
  94        int invert = (kcontrol->private_value >> 22) & 1;
  95        int val;
  96
  97        mutex_lock(&ak4531->reg_mutex);
  98        val = (ak4531->regs[reg] >> shift) & mask;
  99        mutex_unlock(&ak4531->reg_mutex);
 100        if (invert) {
 101                val = mask - val;
 102        }
 103        ucontrol->value.integer.value[0] = val;
 104        return 0;
 105}
 106
 107static int snd_ak4531_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 108{
 109        struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 110        int reg = kcontrol->private_value & 0xff;
 111        int shift = (kcontrol->private_value >> 16) & 0x07;
 112        int mask = (kcontrol->private_value >> 24) & 0xff;
 113        int invert = (kcontrol->private_value >> 22) & 1;
 114        int change;
 115        int val;
 116
 117        val = ucontrol->value.integer.value[0] & mask;
 118        if (invert) {
 119                val = mask - val;
 120        }
 121        val <<= shift;
 122        mutex_lock(&ak4531->reg_mutex);
 123        val = (ak4531->regs[reg] & ~(mask << shift)) | val;
 124        change = val != ak4531->regs[reg];
 125        ak4531->write(ak4531, reg, ak4531->regs[reg] = val);
 126        mutex_unlock(&ak4531->reg_mutex);
 127        return change;
 128}
 129
 130#define AK4531_DOUBLE(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert) \
 131{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 132  .info = snd_ak4531_info_double, \
 133  .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
 134  .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22) }
 135#define AK4531_DOUBLE_TLV(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert, xtlv) \
 136{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
 137  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
 138  .name = xname, .index = xindex, \
 139  .info = snd_ak4531_info_double, \
 140  .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
 141  .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22), \
 142  .tlv = { .p = (xtlv) } }
 143
 144static int snd_ak4531_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 145{
 146        int mask = (kcontrol->private_value >> 24) & 0xff;
 147
 148        uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
 149        uinfo->count = 2;
 150        uinfo->value.integer.min = 0;
 151        uinfo->value.integer.max = mask;
 152        return 0;
 153}
 154 
 155static int snd_ak4531_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 156{
 157        struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 158        int left_reg = kcontrol->private_value & 0xff;
 159        int right_reg = (kcontrol->private_value >> 8) & 0xff;
 160        int left_shift = (kcontrol->private_value >> 16) & 0x07;
 161        int right_shift = (kcontrol->private_value >> 19) & 0x07;
 162        int mask = (kcontrol->private_value >> 24) & 0xff;
 163        int invert = (kcontrol->private_value >> 22) & 1;
 164        int left, right;
 165
 166        mutex_lock(&ak4531->reg_mutex);
 167        left = (ak4531->regs[left_reg] >> left_shift) & mask;
 168        right = (ak4531->regs[right_reg] >> right_shift) & mask;
 169        mutex_unlock(&ak4531->reg_mutex);
 170        if (invert) {
 171                left = mask - left;
 172                right = mask - right;
 173        }
 174        ucontrol->value.integer.value[0] = left;
 175        ucontrol->value.integer.value[1] = right;
 176        return 0;
 177}
 178
 179static int snd_ak4531_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 180{
 181        struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 182        int left_reg = kcontrol->private_value & 0xff;
 183        int right_reg = (kcontrol->private_value >> 8) & 0xff;
 184        int left_shift = (kcontrol->private_value >> 16) & 0x07;
 185        int right_shift = (kcontrol->private_value >> 19) & 0x07;
 186        int mask = (kcontrol->private_value >> 24) & 0xff;
 187        int invert = (kcontrol->private_value >> 22) & 1;
 188        int change;
 189        int left, right;
 190
 191        left = ucontrol->value.integer.value[0] & mask;
 192        right = ucontrol->value.integer.value[1] & mask;
 193        if (invert) {
 194                left = mask - left;
 195                right = mask - right;
 196        }
 197        left <<= left_shift;
 198        right <<= right_shift;
 199        mutex_lock(&ak4531->reg_mutex);
 200        if (left_reg == right_reg) {
 201                left = (ak4531->regs[left_reg] & ~((mask << left_shift) | (mask << right_shift))) | left | right;
 202                change = left != ak4531->regs[left_reg];
 203                ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
 204        } else {
 205                left = (ak4531->regs[left_reg] & ~(mask << left_shift)) | left;
 206                right = (ak4531->regs[right_reg] & ~(mask << right_shift)) | right;
 207                change = left != ak4531->regs[left_reg] || right != ak4531->regs[right_reg];
 208                ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
 209                ak4531->write(ak4531, right_reg, ak4531->regs[right_reg] = right);
 210        }
 211        mutex_unlock(&ak4531->reg_mutex);
 212        return change;
 213}
 214
 215#define AK4531_INPUT_SW(xname, xindex, reg1, reg2, left_shift, right_shift) \
 216{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 217  .info = snd_ak4531_info_input_sw, \
 218  .get = snd_ak4531_get_input_sw, .put = snd_ak4531_put_input_sw, \
 219  .private_value = reg1 | (reg2 << 8) | (left_shift << 16) | (right_shift << 24) }
 220
 221static int snd_ak4531_info_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 222{
 223        uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 224        uinfo->count = 4;
 225        uinfo->value.integer.min = 0;
 226        uinfo->value.integer.max = 1;
 227        return 0;
 228}
 229 
 230static int snd_ak4531_get_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
 238        mutex_lock(&ak4531->reg_mutex);
 239        ucontrol->value.integer.value[0] = (ak4531->regs[reg1] >> left_shift) & 1;
 240        ucontrol->value.integer.value[1] = (ak4531->regs[reg2] >> left_shift) & 1;
 241        ucontrol->value.integer.value[2] = (ak4531->regs[reg1] >> right_shift) & 1;
 242        ucontrol->value.integer.value[3] = (ak4531->regs[reg2] >> right_shift) & 1;
 243        mutex_unlock(&ak4531->reg_mutex);
 244        return 0;
 245}
 246
 247static int snd_ak4531_put_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 248{
 249        struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 250        int reg1 = kcontrol->private_value & 0xff;
 251        int reg2 = (kcontrol->private_value >> 8) & 0xff;
 252        int left_shift = (kcontrol->private_value >> 16) & 0x0f;
 253        int right_shift = (kcontrol->private_value >> 24) & 0x0f;
 254        int change;
 255        int val1, val2;
 256
 257        mutex_lock(&ak4531->reg_mutex);
 258        val1 = ak4531->regs[reg1] & ~((1 << left_shift) | (1 << right_shift));
 259        val2 = ak4531->regs[reg2] & ~((1 << left_shift) | (1 << right_shift));
 260        val1 |= (ucontrol->value.integer.value[0] & 1) << left_shift;
 261        val2 |= (ucontrol->value.integer.value[1] & 1) << left_shift;
 262        val1 |= (ucontrol->value.integer.value[2] & 1) << right_shift;
 263        val2 |= (ucontrol->value.integer.value[3] & 1) << right_shift;
 264        change = val1 != ak4531->regs[reg1] || val2 != ak4531->regs[reg2];
 265        ak4531->write(ak4531, reg1, ak4531->regs[reg1] = val1);
 266        ak4531->write(ak4531, reg2, ak4531->regs[reg2] = val2);
 267        mutex_unlock(&ak4531->reg_mutex);
 268        return change;
 269}
 270
 271static const DECLARE_TLV_DB_SCALE(db_scale_master, -6200, 200, 0);
 272static const DECLARE_TLV_DB_SCALE(db_scale_mono, -2800, 400, 0);
 273static const DECLARE_TLV_DB_SCALE(db_scale_input, -5000, 200, 0);
 274
 275static struct snd_kcontrol_new snd_ak4531_controls[] __devinitdata = {
 276
 277AK4531_DOUBLE_TLV("Master Playback Switch", 0,
 278                  AK4531_LMASTER, AK4531_RMASTER, 7, 7, 1, 1,
 279                  db_scale_master),
 280AK4531_DOUBLE("Master Playback Volume", 0, AK4531_LMASTER, AK4531_RMASTER, 0, 0, 0x1f, 1),
 281
 282AK4531_SINGLE_TLV("Master Mono Playback Switch", 0, AK4531_MONO_OUT, 7, 1, 1,
 283                  db_scale_mono),
 284AK4531_SINGLE("Master Mono Playback Volume", 0, AK4531_MONO_OUT, 0, 0x07, 1),
 285
 286AK4531_DOUBLE("PCM Switch", 0, AK4531_LVOICE, AK4531_RVOICE, 7, 7, 1, 1),
 287AK4531_DOUBLE_TLV("PCM Volume", 0, AK4531_LVOICE, AK4531_RVOICE, 0, 0, 0x1f, 1,
 288                  db_scale_input),
 289AK4531_DOUBLE("PCM Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 3, 2, 1, 0),
 290AK4531_DOUBLE("PCM Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 2, 2, 1, 0),
 291
 292AK4531_DOUBLE("PCM Switch", 1, AK4531_LFM, AK4531_RFM, 7, 7, 1, 1),
 293AK4531_DOUBLE_TLV("PCM Volume", 1, AK4531_LFM, AK4531_RFM, 0, 0, 0x1f, 1,
 294                  db_scale_input),
 295AK4531_DOUBLE("PCM Playback Switch", 1, AK4531_OUT_SW1, AK4531_OUT_SW1, 6, 5, 1, 0),
 296AK4531_INPUT_SW("PCM Capture Route", 1, AK4531_LIN_SW1, AK4531_RIN_SW1, 6, 5),
 297
 298AK4531_DOUBLE("CD Switch", 0, AK4531_LCD, AK4531_RCD, 7, 7, 1, 1),
 299AK4531_DOUBLE_TLV("CD Volume", 0, AK4531_LCD, AK4531_RCD, 0, 0, 0x1f, 1,
 300                  db_scale_input),
 301AK4531_DOUBLE("CD Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 2, 1, 1, 0),
 302AK4531_INPUT_SW("CD Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 2, 1),
 303
 304AK4531_DOUBLE("Line Switch", 0, AK4531_LLINE, AK4531_RLINE, 7, 7, 1, 1),
 305AK4531_DOUBLE_TLV("Line Volume", 0, AK4531_LLINE, AK4531_RLINE, 0, 0, 0x1f, 1,
 306                  db_scale_input),
 307AK4531_DOUBLE("Line Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 4, 3, 1, 0),
 308AK4531_INPUT_SW("Line Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 4, 3),
 309
 310AK4531_DOUBLE("Aux Switch", 0, AK4531_LAUXA, AK4531_RAUXA, 7, 7, 1, 1),
 311AK4531_DOUBLE_TLV("Aux Volume", 0, AK4531_LAUXA, AK4531_RAUXA, 0, 0, 0x1f, 1,
 312                  db_scale_input),
 313AK4531_DOUBLE("Aux Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 5, 4, 1, 0),
 314AK4531_INPUT_SW("Aux Capture Route", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 4, 3),
 315
 316AK4531_SINGLE("Mono Switch", 0, AK4531_MONO1, 7, 1, 1),
 317AK4531_SINGLE_TLV("Mono Volume", 0, AK4531_MONO1, 0, 0x1f, 1, db_scale_input),
 318AK4531_SINGLE("Mono Playback Switch", 0, AK4531_OUT_SW2, 0, 1, 0),
 319AK4531_DOUBLE("Mono Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 0, 0, 1, 0),
 320
 321AK4531_SINGLE("Mono Switch", 1, AK4531_MONO2, 7, 1, 1),
 322AK4531_SINGLE_TLV("Mono Volume", 1, AK4531_MONO2, 0, 0x1f, 1, db_scale_input),
 323AK4531_SINGLE("Mono Playback Switch", 1, AK4531_OUT_SW2, 1, 1, 0),
 324AK4531_DOUBLE("Mono Capture Switch", 1, AK4531_LIN_SW2, AK4531_RIN_SW2, 1, 1, 1, 0),
 325
 326AK4531_SINGLE_TLV("Mic Volume", 0, AK4531_MIC, 0, 0x1f, 1, db_scale_input),
 327AK4531_SINGLE("Mic Switch", 0, AK4531_MIC, 7, 1, 1),
 328AK4531_SINGLE("Mic Playback Switch", 0, AK4531_OUT_SW1, 0, 1, 0),
 329AK4531_DOUBLE("Mic Capture Switch", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 0, 0, 1, 0),
 330
 331AK4531_DOUBLE("Mic Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 7, 7, 1, 0),
 332AK4531_DOUBLE("Mono1 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 6, 6, 1, 0),
 333AK4531_DOUBLE("Mono2 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 5, 5, 1, 0),
 334
 335AK4531_SINGLE("AD Input Select", 0, AK4531_AD_IN, 0, 1, 0),
 336AK4531_SINGLE("Mic Boost (+30dB)", 0, AK4531_MIC_GAIN, 0, 1, 0)
 337};
 338
 339static int snd_ak4531_free(struct snd_ak4531 *ak4531)
 340{
 341        if (ak4531) {
 342                if (ak4531->private_free)
 343                        ak4531->private_free(ak4531);
 344                kfree(ak4531);
 345        }
 346        return 0;
 347}
 348
 349static int snd_ak4531_dev_free(struct snd_device *device)
 350{
 351        struct snd_ak4531 *ak4531 = device->device_data;
 352        return snd_ak4531_free(ak4531);
 353}
 354
 355static u8 snd_ak4531_initial_map[0x19 + 1] = {
 356        0x9f,           /* 00: Master Volume Lch */
 357        0x9f,           /* 01: Master Volume Rch */
 358        0x9f,           /* 02: Voice Volume Lch */
 359        0x9f,           /* 03: Voice Volume Rch */
 360        0x9f,           /* 04: FM Volume Lch */
 361        0x9f,           /* 05: FM Volume Rch */
 362        0x9f,           /* 06: CD Audio Volume Lch */
 363        0x9f,           /* 07: CD Audio Volume Rch */
 364        0x9f,           /* 08: Line Volume Lch */
 365        0x9f,           /* 09: Line Volume Rch */
 366        0x9f,           /* 0a: Aux Volume Lch */
 367        0x9f,           /* 0b: Aux Volume Rch */
 368        0x9f,           /* 0c: Mono1 Volume */
 369        0x9f,           /* 0d: Mono2 Volume */
 370        0x9f,           /* 0e: Mic Volume */
 371        0x87,           /* 0f: Mono-out Volume */
 372        0x00,           /* 10: Output Mixer SW1 */
 373        0x00,           /* 11: Output Mixer SW2 */
 374        0x00,           /* 12: Lch Input Mixer SW1 */
 375        0x00,           /* 13: Rch Input Mixer SW1 */
 376        0x00,           /* 14: Lch Input Mixer SW2 */
 377        0x00,           /* 15: Rch Input Mixer SW2 */
 378        0x00,           /* 16: Reset & Power Down */
 379        0x00,           /* 17: Clock Select */
 380        0x00,           /* 18: AD Input Select */
 381        0x01            /* 19: Mic Amp Setup */
 382};
 383
 384int __devinit snd_ak4531_mixer(struct snd_card *card,
 385                               struct snd_ak4531 *_ak4531,
 386                               struct snd_ak4531 **rak4531)
 387{
 388        unsigned int idx;
 389        int err;
 390        struct snd_ak4531 *ak4531;
 391        static struct snd_device_ops ops = {
 392                .dev_free =     snd_ak4531_dev_free,
 393        };
 394
 395        if (snd_BUG_ON(!card || !_ak4531))
 396                return -EINVAL;
 397        if (rak4531)
 398                *rak4531 = NULL;
 399        ak4531 = kzalloc(sizeof(*ak4531), GFP_KERNEL);
 400        if (ak4531 == NULL)
 401                return -ENOMEM;
 402        *ak4531 = *_ak4531;
 403        mutex_init(&ak4531->reg_mutex);
 404        if ((err = snd_component_add(card, "AK4531")) < 0) {
 405                snd_ak4531_free(ak4531);
 406                return err;
 407        }
 408        strcpy(card->mixername, "Asahi Kasei AK4531");
 409        ak4531->write(ak4531, AK4531_RESET, 0x03);      /* no RST, PD */
 410        udelay(100);
 411        ak4531->write(ak4531, AK4531_CLOCK, 0x00);      /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */
 412        for (idx = 0; idx <= 0x19; idx++) {
 413                if (idx == AK4531_RESET || idx == AK4531_CLOCK)
 414                        continue;
 415                ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]);    /* recording source is mixer */
 416        }
 417        for (idx = 0; idx < ARRAY_SIZE(snd_ak4531_controls); idx++) {
 418                if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_ak4531_controls[idx], ak4531))) < 0) {
 419                        snd_ak4531_free(ak4531);
 420                        return err;
 421                }
 422        }
 423        snd_ak4531_proc_init(card, ak4531);
 424        if ((err = snd_device_new(card, SNDRV_DEV_CODEC, ak4531, &ops)) < 0) {
 425                snd_ak4531_free(ak4531);
 426                return err;
 427        }
 428
 429#if 0
 430        snd_ak4531_dump(ak4531);
 431#endif
 432        if (rak4531)
 433                *rak4531 = ak4531;
 434        return 0;
 435}
 436
 437/*
 438 * power management
 439 */
 440#ifdef CONFIG_PM
 441void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
 442{
 443        /* mute */
 444        ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
 445        ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
 446        /* powerdown */
 447        ak4531->write(ak4531, AK4531_RESET, 0x01);
 448}
 449
 450void snd_ak4531_resume(struct snd_ak4531 *ak4531)
 451{
 452        int idx;
 453
 454        /* initialize */
 455        ak4531->write(ak4531, AK4531_RESET, 0x03);
 456        udelay(100);
 457        ak4531->write(ak4531, AK4531_CLOCK, 0x00);
 458        /* restore mixer registers */
 459        for (idx = 0; idx <= 0x19; idx++) {
 460                if (idx == AK4531_RESET || idx == AK4531_CLOCK)
 461                        continue;
 462                ak4531->write(ak4531, idx, ak4531->regs[idx]);
 463        }
 464}
 465#endif
 466
 467#ifdef CONFIG_PROC_FS
 468/*
 469 * /proc interface
 470 */
 471
 472static void snd_ak4531_proc_read(struct snd_info_entry *entry, 
 473                                 struct snd_info_buffer *buffer)
 474{
 475        struct snd_ak4531 *ak4531 = entry->private_data;
 476
 477        snd_iprintf(buffer, "Asahi Kasei AK4531\n\n");
 478        snd_iprintf(buffer, "Recording source   : %s\n"
 479                    "MIC gain           : %s\n",
 480                    ak4531->regs[AK4531_AD_IN] & 1 ? "external" : "mixer",
 481                    ak4531->regs[AK4531_MIC_GAIN] & 1 ? "+30dB" : "+0dB");
 482}
 483
 484static void __devinit
 485snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531)
 486{
 487        struct snd_info_entry *entry;
 488
 489        if (! snd_card_proc_new(card, "ak4531", &entry))
 490                snd_info_set_text_ops(entry, ak4531, snd_ak4531_proc_read);
 491}
 492#endif
 493