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#include <linux/module.h>
  27
  28#include <sound/core.h>
  29#include <sound/ak4531_codec.h>
  30#include <sound/tlv.h>
  31
  32/*
  33MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  34MODULE_DESCRIPTION("Universal routines for AK4531 codec");
  35MODULE_LICENSE("GPL");
  36*/
  37
  38#ifdef CONFIG_PROC_FS
  39static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531);
  40#else
  41#define snd_ak4531_proc_init(card,ak)
  42#endif
  43
  44/*
  45 *
  46 */
  47 
  48#if 0
  49
  50static void snd_ak4531_dump(struct snd_ak4531 *ak4531)
  51{
  52        int idx;
  53        
  54        for (idx = 0; idx < 0x19; idx++)
  55                printk(KERN_DEBUG "ak4531 0x%x: 0x%x\n",
  56                       idx, ak4531->regs[idx]);
  57}
  58
  59#endif
  60
  61/*
  62 *
  63 */
  64
  65#define AK4531_SINGLE(xname, xindex, reg, shift, mask, invert) \
  66{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  67  .info = snd_ak4531_info_single, \
  68  .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
  69  .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22) }
  70#define AK4531_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv)    \
  71{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
  72  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
  73  .name = xname, .index = xindex, \
  74  .info = snd_ak4531_info_single, \
  75  .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
  76  .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22), \
  77  .tlv = { .p = (xtlv) } }
  78
  79static int snd_ak4531_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
  80{
  81        int mask = (kcontrol->private_value >> 24) & 0xff;
  82
  83        uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
  84        uinfo->count = 1;
  85        uinfo->value.integer.min = 0;
  86        uinfo->value.integer.max = mask;
  87        return 0;
  88}
  89 
  90static int snd_ak4531_get_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 val;
  98
  99        mutex_lock(&ak4531->reg_mutex);
 100        val = (ak4531->regs[reg] >> shift) & mask;
 101        mutex_unlock(&ak4531->reg_mutex);
 102        if (invert) {
 103                val = mask - val;
 104        }
 105        ucontrol->value.integer.value[0] = val;
 106        return 0;
 107}
 108
 109static int snd_ak4531_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 110{
 111        struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 112        int reg = kcontrol->private_value & 0xff;
 113        int shift = (kcontrol->private_value >> 16) & 0x07;
 114        int mask = (kcontrol->private_value >> 24) & 0xff;
 115        int invert = (kcontrol->private_value >> 22) & 1;
 116        int change;
 117        int val;
 118
 119        val = ucontrol->value.integer.value[0] & mask;
 120        if (invert) {
 121                val = mask - val;
 122        }
 123        val <<= shift;
 124        mutex_lock(&ak4531->reg_mutex);
 125        val = (ak4531->regs[reg] & ~(mask << shift)) | val;
 126        change = val != ak4531->regs[reg];
 127        ak4531->write(ak4531, reg, ak4531->regs[reg] = val);
 128        mutex_unlock(&ak4531->reg_mutex);
 129        return change;
 130}
 131
 132#define AK4531_DOUBLE(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert) \
 133{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 134  .info = snd_ak4531_info_double, \
 135  .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
 136  .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22) }
 137#define AK4531_DOUBLE_TLV(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert, xtlv) \
 138{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
 139  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
 140  .name = xname, .index = xindex, \
 141  .info = snd_ak4531_info_double, \
 142  .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
 143  .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22), \
 144  .tlv = { .p = (xtlv) } }
 145
 146static int snd_ak4531_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 147{
 148        int mask = (kcontrol->private_value >> 24) & 0xff;
 149
 150        uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
 151        uinfo->count = 2;
 152        uinfo->value.integer.min = 0;
 153        uinfo->value.integer.max = mask;
 154        return 0;
 155}
 156 
 157static int snd_ak4531_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 158{
 159        struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 160        int left_reg = kcontrol->private_value & 0xff;
 161        int right_reg = (kcontrol->private_value >> 8) & 0xff;
 162        int left_shift = (kcontrol->private_value >> 16) & 0x07;
 163        int right_shift = (kcontrol->private_value >> 19) & 0x07;
 164        int mask = (kcontrol->private_value >> 24) & 0xff;
 165        int invert = (kcontrol->private_value >> 22) & 1;
 166        int left, right;
 167
 168        mutex_lock(&ak4531->reg_mutex);
 169        left = (ak4531->regs[left_reg] >> left_shift) & mask;
 170        right = (ak4531->regs[right_reg] >> right_shift) & mask;
 171        mutex_unlock(&ak4531->reg_mutex);
 172        if (invert) {
 173                left = mask - left;
 174                right = mask - right;
 175        }
 176        ucontrol->value.integer.value[0] = left;
 177        ucontrol->value.integer.value[1] = right;
 178        return 0;
 179}
 180
 181static int snd_ak4531_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 182{
 183        struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 184        int left_reg = kcontrol->private_value & 0xff;
 185        int right_reg = (kcontrol->private_value >> 8) & 0xff;
 186        int left_shift = (kcontrol->private_value >> 16) & 0x07;
 187        int right_shift = (kcontrol->private_value >> 19) & 0x07;
 188        int mask = (kcontrol->private_value >> 24) & 0xff;
 189        int invert = (kcontrol->private_value >> 22) & 1;
 190        int change;
 191        int left, right;
 192
 193        left = ucontrol->value.integer.value[0] & mask;
 194        right = ucontrol->value.integer.value[1] & mask;
 195        if (invert) {
 196                left = mask - left;
 197                right = mask - right;
 198        }
 199        left <<= left_shift;
 200        right <<= right_shift;
 201        mutex_lock(&ak4531->reg_mutex);
 202        if (left_reg == right_reg) {
 203                left = (ak4531->regs[left_reg] & ~((mask << left_shift) | (mask << right_shift))) | left | right;
 204                change = left != ak4531->regs[left_reg];
 205                ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
 206        } else {
 207                left = (ak4531->regs[left_reg] & ~(mask << left_shift)) | left;
 208                right = (ak4531->regs[right_reg] & ~(mask << right_shift)) | right;
 209                change = left != ak4531->regs[left_reg] || right != ak4531->regs[right_reg];
 210                ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
 211                ak4531->write(ak4531, right_reg, ak4531->regs[right_reg] = right);
 212        }
 213        mutex_unlock(&ak4531->reg_mutex);
 214        return change;
 215}
 216
 217#define AK4531_INPUT_SW(xname, xindex, reg1, reg2, left_shift, right_shift) \
 218{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 219  .info = snd_ak4531_info_input_sw, \
 220  .get = snd_ak4531_get_input_sw, .put = snd_ak4531_put_input_sw, \
 221  .private_value = reg1 | (reg2 << 8) | (left_shift << 16) | (right_shift << 24) }
 222
 223static int snd_ak4531_info_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 224{
 225        uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 226        uinfo->count = 4;
 227        uinfo->value.integer.min = 0;
 228        uinfo->value.integer.max = 1;
 229        return 0;
 230}
 231 
 232static int snd_ak4531_get_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 233{
 234        struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 235        int reg1 = kcontrol->private_value & 0xff;
 236        int reg2 = (kcontrol->private_value >> 8) & 0xff;
 237        int left_shift = (kcontrol->private_value >> 16) & 0x0f;
 238        int right_shift = (kcontrol->private_value >> 24) & 0x0f;
 239
 240        mutex_lock(&ak4531->reg_mutex);
 241        ucontrol->value.integer.value[0] = (ak4531->regs[reg1] >> left_shift) & 1;
 242        ucontrol->value.integer.value[1] = (ak4531->regs[reg2] >> left_shift) & 1;
 243        ucontrol->value.integer.value[2] = (ak4531->regs[reg1] >> right_shift) & 1;
 244        ucontrol->value.integer.value[3] = (ak4531->regs[reg2] >> right_shift) & 1;
 245        mutex_unlock(&ak4531->reg_mutex);
 246        return 0;
 247}
 248
 249static int snd_ak4531_put_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 250{
 251        struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 252        int reg1 = kcontrol->private_value & 0xff;
 253        int reg2 = (kcontrol->private_value >> 8) & 0xff;
 254        int left_shift = (kcontrol->private_value >> 16) & 0x0f;
 255        int right_shift = (kcontrol->private_value >> 24) & 0x0f;
 256        int change;
 257        int val1, val2;
 258
 259        mutex_lock(&ak4531->reg_mutex);
 260        val1 = ak4531->regs[reg1] & ~((1 << left_shift) | (1 << right_shift));
 261        val2 = ak4531->regs[reg2] & ~((1 << left_shift) | (1 << right_shift));
 262        val1 |= (ucontrol->value.integer.value[0] & 1) << left_shift;
 263        val2 |= (ucontrol->value.integer.value[1] & 1) << left_shift;
 264        val1 |= (ucontrol->value.integer.value[2] & 1) << right_shift;
 265        val2 |= (ucontrol->value.integer.value[3] & 1) << right_shift;
 266        change = val1 != ak4531->regs[reg1] || val2 != ak4531->regs[reg2];
 267        ak4531->write(ak4531, reg1, ak4531->regs[reg1] = val1);
 268        ak4531->write(ak4531, reg2, ak4531->regs[reg2] = val2);
 269        mutex_unlock(&ak4531->reg_mutex);
 270        return change;
 271}
 272
 273static const DECLARE_TLV_DB_SCALE(db_scale_master, -6200, 200, 0);
 274static const DECLARE_TLV_DB_SCALE(db_scale_mono, -2800, 400, 0);
 275static const DECLARE_TLV_DB_SCALE(db_scale_input, -5000, 200, 0);
 276
 277static struct snd_kcontrol_new snd_ak4531_controls[] __devinitdata = {
 278
 279AK4531_DOUBLE_TLV("Master Playback Switch", 0,
 280                  AK4531_LMASTER, AK4531_RMASTER, 7, 7, 1, 1,
 281                  db_scale_master),
 282AK4531_DOUBLE("Master Playback Volume", 0, AK4531_LMASTER, AK4531_RMASTER, 0, 0, 0x1f, 1),
 283
 284AK4531_SINGLE_TLV("Master Mono Playback Switch", 0, AK4531_MONO_OUT, 7, 1, 1,
 285                  db_scale_mono),
 286AK4531_SINGLE("Master Mono Playback Volume", 0, AK4531_MONO_OUT, 0, 0x07, 1),
 287
 288AK4531_DOUBLE("PCM Switch", 0, AK4531_LVOICE, AK4531_RVOICE, 7, 7, 1, 1),
 289AK4531_DOUBLE_TLV("PCM Volume", 0, AK4531_LVOICE, AK4531_RVOICE, 0, 0, 0x1f, 1,
 290                  db_scale_input),
 291AK4531_DOUBLE("PCM Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 3, 2, 1, 0),
 292AK4531_DOUBLE("PCM Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 2, 2, 1, 0),
 293
 294AK4531_DOUBLE("PCM Switch", 1, AK4531_LFM, AK4531_RFM, 7, 7, 1, 1),
 295AK4531_DOUBLE_TLV("PCM Volume", 1, AK4531_LFM, AK4531_RFM, 0, 0, 0x1f, 1,
 296                  db_scale_input),
 297AK4531_DOUBLE("PCM Playback Switch", 1, AK4531_OUT_SW1, AK4531_OUT_SW1, 6, 5, 1, 0),
 298AK4531_INPUT_SW("PCM Capture Route", 1, AK4531_LIN_SW1, AK4531_RIN_SW1, 6, 5),
 299
 300AK4531_DOUBLE("CD Switch", 0, AK4531_LCD, AK4531_RCD, 7, 7, 1, 1),
 301AK4531_DOUBLE_TLV("CD Volume", 0, AK4531_LCD, AK4531_RCD, 0, 0, 0x1f, 1,
 302                  db_scale_input),
 303AK4531_DOUBLE("CD Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 2, 1, 1, 0),
 304AK4531_INPUT_SW("CD Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 2, 1),
 305
 306AK4531_DOUBLE("Line Switch", 0, AK4531_LLINE, AK4531_RLINE, 7, 7, 1, 1),
 307AK4531_DOUBLE_TLV("Line Volume", 0, AK4531_LLINE, AK4531_RLINE, 0, 0, 0x1f, 1,
 308                  db_scale_input),
 309AK4531_DOUBLE("Line Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 4, 3, 1, 0),
 310AK4531_INPUT_SW("Line Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 4, 3),
 311
 312AK4531_DOUBLE("Aux Switch", 0, AK4531_LAUXA, AK4531_RAUXA, 7, 7, 1, 1),
 313AK4531_DOUBLE_TLV("Aux Volume", 0, AK4531_LAUXA, AK4531_RAUXA, 0, 0, 0x1f, 1,
 314                  db_scale_input),
 315AK4531_DOUBLE("Aux Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 5, 4, 1, 0),
 316AK4531_INPUT_SW("Aux Capture Route", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 4, 3),
 317
 318AK4531_SINGLE("Mono Switch", 0, AK4531_MONO1, 7, 1, 1),
 319AK4531_SINGLE_TLV("Mono Volume", 0, AK4531_MONO1, 0, 0x1f, 1, db_scale_input),
 320AK4531_SINGLE("Mono Playback Switch", 0, AK4531_OUT_SW2, 0, 1, 0),
 321AK4531_DOUBLE("Mono Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 0, 0, 1, 0),
 322
 323AK4531_SINGLE("Mono Switch", 1, AK4531_MONO2, 7, 1, 1),
 324AK4531_SINGLE_TLV("Mono Volume", 1, AK4531_MONO2, 0, 0x1f, 1, db_scale_input),
 325AK4531_SINGLE("Mono Playback Switch", 1, AK4531_OUT_SW2, 1, 1, 0),
 326AK4531_DOUBLE("Mono Capture Switch", 1, AK4531_LIN_SW2, AK4531_RIN_SW2, 1, 1, 1, 0),
 327
 328AK4531_SINGLE_TLV("Mic Volume", 0, AK4531_MIC, 0, 0x1f, 1, db_scale_input),
 329AK4531_SINGLE("Mic Switch", 0, AK4531_MIC, 7, 1, 1),
 330AK4531_SINGLE("Mic Playback Switch", 0, AK4531_OUT_SW1, 0, 1, 0),
 331AK4531_DOUBLE("Mic Capture Switch", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 0, 0, 1, 0),
 332
 333AK4531_DOUBLE("Mic Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 7, 7, 1, 0),
 334AK4531_DOUBLE("Mono1 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 6, 6, 1, 0),
 335AK4531_DOUBLE("Mono2 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 5, 5, 1, 0),
 336
 337AK4531_SINGLE("AD Input Select", 0, AK4531_AD_IN, 0, 1, 0),
 338AK4531_SINGLE("Mic Boost (+30dB)", 0, AK4531_MIC_GAIN, 0, 1, 0)
 339};
 340
 341static int snd_ak4531_free(struct snd_ak4531 *ak4531)
 342{
 343        if (ak4531) {
 344                if (ak4531->private_free)
 345                        ak4531->private_free(ak4531);
 346                kfree(ak4531);
 347        }
 348        return 0;
 349}
 350
 351static int snd_ak4531_dev_free(struct snd_device *device)
 352{
 353        struct snd_ak4531 *ak4531 = device->device_data;
 354        return snd_ak4531_free(ak4531);
 355}
 356
 357static u8 snd_ak4531_initial_map[0x19 + 1] = {
 358        0x9f,           /* 00: Master Volume Lch */
 359        0x9f,           /* 01: Master Volume Rch */
 360        0x9f,           /* 02: Voice Volume Lch */
 361        0x9f,           /* 03: Voice Volume Rch */
 362        0x9f,           /* 04: FM Volume Lch */
 363        0x9f,           /* 05: FM Volume Rch */
 364        0x9f,           /* 06: CD Audio Volume Lch */
 365        0x9f,           /* 07: CD Audio Volume Rch */
 366        0x9f,           /* 08: Line Volume Lch */
 367        0x9f,           /* 09: Line Volume Rch */
 368        0x9f,           /* 0a: Aux Volume Lch */
 369        0x9f,           /* 0b: Aux Volume Rch */
 370        0x9f,           /* 0c: Mono1 Volume */
 371        0x9f,           /* 0d: Mono2 Volume */
 372        0x9f,           /* 0e: Mic Volume */
 373        0x87,           /* 0f: Mono-out Volume */
 374        0x00,           /* 10: Output Mixer SW1 */
 375        0x00,           /* 11: Output Mixer SW2 */
 376        0x00,           /* 12: Lch Input Mixer SW1 */
 377        0x00,           /* 13: Rch Input Mixer SW1 */
 378        0x00,           /* 14: Lch Input Mixer SW2 */
 379        0x00,           /* 15: Rch Input Mixer SW2 */
 380        0x00,           /* 16: Reset & Power Down */
 381        0x00,           /* 17: Clock Select */
 382        0x00,           /* 18: AD Input Select */
 383        0x01            /* 19: Mic Amp Setup */
 384};
 385
 386int __devinit snd_ak4531_mixer(struct snd_card *card,
 387                               struct snd_ak4531 *_ak4531,
 388                               struct snd_ak4531 **rak4531)
 389{
 390        unsigned int idx;
 391        int err;
 392        struct snd_ak4531 *ak4531;
 393        static struct snd_device_ops ops = {
 394                .dev_free =     snd_ak4531_dev_free,
 395        };
 396
 397        if (snd_BUG_ON(!card || !_ak4531))
 398                return -EINVAL;
 399        if (rak4531)
 400                *rak4531 = NULL;
 401        ak4531 = kzalloc(sizeof(*ak4531), GFP_KERNEL);
 402        if (ak4531 == NULL)
 403                return -ENOMEM;
 404        *ak4531 = *_ak4531;
 405        mutex_init(&ak4531->reg_mutex);
 406        if ((err = snd_component_add(card, "AK4531")) < 0) {
 407                snd_ak4531_free(ak4531);
 408                return err;
 409        }
 410        strcpy(card->mixername, "Asahi Kasei AK4531");
 411        ak4531->write(ak4531, AK4531_RESET, 0x03);      /* no RST, PD */
 412        udelay(100);
 413        ak4531->write(ak4531, AK4531_CLOCK, 0x00);      /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */
 414        for (idx = 0; idx <= 0x19; idx++) {
 415                if (idx == AK4531_RESET || idx == AK4531_CLOCK)
 416                        continue;
 417                ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]);    /* recording source is mixer */
 418        }
 419        for (idx = 0; idx < ARRAY_SIZE(snd_ak4531_controls); idx++) {
 420                if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_ak4531_controls[idx], ak4531))) < 0) {
 421                        snd_ak4531_free(ak4531);
 422                        return err;
 423                }
 424        }
 425        snd_ak4531_proc_init(card, ak4531);
 426        if ((err = snd_device_new(card, SNDRV_DEV_CODEC, ak4531, &ops)) < 0) {
 427                snd_ak4531_free(ak4531);
 428                return err;
 429        }
 430
 431#if 0
 432        snd_ak4531_dump(ak4531);
 433#endif
 434        if (rak4531)
 435                *rak4531 = ak4531;
 436        return 0;
 437}
 438
 439/*
 440 * power management
 441 */
 442#ifdef CONFIG_PM
 443void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
 444{
 445        /* mute */
 446        ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
 447        ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
 448        /* powerdown */
 449        ak4531->write(ak4531, AK4531_RESET, 0x01);
 450}
 451
 452void snd_ak4531_resume(struct snd_ak4531 *ak4531)
 453{
 454        int idx;
 455
 456        /* initialize */
 457        ak4531->write(ak4531, AK4531_RESET, 0x03);
 458        udelay(100);
 459        ak4531->write(ak4531, AK4531_CLOCK, 0x00);
 460        /* restore mixer registers */
 461        for (idx = 0; idx <= 0x19; idx++) {
 462                if (idx == AK4531_RESET || idx == AK4531_CLOCK)
 463                        continue;
 464                ak4531->write(ak4531, idx, ak4531->regs[idx]);
 465        }
 466}
 467#endif
 468
 469#ifdef CONFIG_PROC_FS
 470/*
 471 * /proc interface
 472 */
 473
 474static void snd_ak4531_proc_read(struct snd_info_entry *entry, 
 475                                 struct snd_info_buffer *buffer)
 476{
 477        struct snd_ak4531 *ak4531 = entry->private_data;
 478
 479        snd_iprintf(buffer, "Asahi Kasei AK4531\n\n");
 480        snd_iprintf(buffer, "Recording source   : %s\n"
 481                    "MIC gain           : %s\n",
 482                    ak4531->regs[AK4531_AD_IN] & 1 ? "external" : "mixer",
 483                    ak4531->regs[AK4531_MIC_GAIN] & 1 ? "+30dB" : "+0dB");
 484}
 485
 486static void __devinit
 487snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531)
 488{
 489        struct snd_info_entry *entry;
 490
 491        if (! snd_card_proc_new(card, "ak4531", &entry))
 492                snd_info_set_text_ops(entry, ak4531, snd_ak4531_proc_read);
 493}
 494#endif
 495
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