sound/pci/ak4531_codec.c

   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 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 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 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         if ((err = snd_component_add(card, "AK4531")) < 0) {
 388                 snd_ak4531_free(ak4531);
 389                 return err;
 390         }
 391         strcpy(card->mixername, "Asahi Kasei AK4531");
 392         ak4531->write(ak4531, AK4531_RESET, 0x03);      /* no RST, PD */
 393         udelay(100);
 394         ak4531->write(ak4531, AK4531_CLOCK, 0x00);      /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */
 395         for (idx = 0; idx <= 0x19; idx++) {
 396                 if (idx == AK4531_RESET || idx == AK4531_CLOCK)
 397                         continue;
 398                 ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]);    /* recording source is mixer */
 399         }
 400         for (idx = 0; idx < ARRAY_SIZE(snd_ak4531_controls); idx++) {
 401                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_ak4531_controls[idx], ak4531))) < 0) {
 402                         snd_ak4531_free(ak4531);
 403                         return err;
 404                 }
 405         }
 406         snd_ak4531_proc_init(card, ak4531);
 407         if ((err = snd_device_new(card, SNDRV_DEV_CODEC, ak4531, &ops)) < 0) {
 408                 snd_ak4531_free(ak4531);
 409                 return err;
 410         }
 411
 412 #if 0
 413         snd_ak4531_dump(ak4531);
 414 #endif
 415         if (rak4531)
 416                 *rak4531 = ak4531;
 417         return 0;
 418 }
 419
 420 /*
 421  * power management
 422  */
 423 #ifdef CONFIG_PM
 424 void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
 425 {
 426         /* mute */
 427         ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
 428         ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
 429         /* powerdown */
 430         ak4531->write(ak4531, AK4531_RESET, 0x01);
 431 }
 432
 433 void snd_ak4531_resume(struct snd_ak4531 *ak4531)
 434 {
 435         int idx;
 436
 437         /* initialize */
 438         ak4531->write(ak4531, AK4531_RESET, 0x03);
 439         udelay(100);
 440         ak4531->write(ak4531, AK4531_CLOCK, 0x00);
 441         /* restore mixer registers */
 442         for (idx = 0; idx <= 0x19; idx++) {
 443                 if (idx == AK4531_RESET || idx == AK4531_CLOCK)
 444                         continue;
 445                 ak4531->write(ak4531, idx, ak4531->regs[idx]);
 446         }
 447 }
 448 #endif
 449
 450 /*
 451  * /proc interface
 452  */
 453
 454 static void snd_ak4531_proc_read(struct snd_info_entry *entry,
 455                                  struct snd_info_buffer *buffer)
 456 {
 457         struct snd_ak4531 *ak4531 = entry->private_data;
 458
 459         snd_iprintf(buffer, "Asahi Kasei AK4531\n\n");
 460         snd_iprintf(buffer, "Recording source   : %s\n"
 461                     "MIC gain           : %s\n",
 462                     ak4531->regs[AK4531_AD_IN] & 1 ? "external" : "mixer",
 463                     ak4531->regs[AK4531_MIC_GAIN] & 1 ? "+30dB" : "+0dB");
 464 }
 465
 466 static void
 467 snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531)
 468 {
 469         snd_card_ro_proc_new(card, "ak4531", ak4531, snd_ak4531_proc_read);
 470 }