sound/pci/ac97/ak4531_codec.c

   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 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  32 MODULE_DESCRIPTION("Universal routines for AK4531 codec");
  33 MODULE_LICENSE("GPL");
  34
  35 #ifdef CONFIG_PROC_FS
  36 static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531);
  37 #else
  38 #define snd_ak4531_proc_init(card,ak)
  39 #endif
  40
  41 /*
  42  *
  43  */
  44
  45 #if 0
  46
  47 static void snd_ak4531_dump(struct snd_ak4531 *ak4531)
  48 {
  49         int idx;
  50
  51         for (idx = 0; idx < 0x19; idx++)
  52                 printk("ak4531 0x%x: 0x%x\n", idx, ak4531->regs[idx]);
  53 }
  54
  55 #endif
  56
  57 /*
  58  *
  59  */
  60
  61 #define AK4531_SINGLE(xname, xindex, reg, shift, mask, invert) \
  62 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  63   .info = snd_ak4531_info_single, \
  64   .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
  65   .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22) }
  66 #define AK4531_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv)    \
  67 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
  68   .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
  69   .name = xname, .index = xindex, \
  70   .info = snd_ak4531_info_single, \
  71   .get = snd_ak4531_get_single, .put = snd_ak4531_put_single, \
  72   .private_value = reg | (shift << 16) | (mask << 24) | (invert << 22), \
  73   .tlv = { .p = (xtlv) } }
  74
  75 static int snd_ak4531_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
  76 {
  77         int mask = (kcontrol->private_value >> 24) & 0xff;
  78
  79         uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
  80         uinfo->count = 1;
  81         uinfo->value.integer.min = 0;
  82         uinfo->value.integer.max = mask;
  83         return 0;
  84 }
  85
  86 static int snd_ak4531_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
  87 {
  88         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
  89         int reg = kcontrol->private_value & 0xff;
  90         int shift = (kcontrol->private_value >> 16) & 0x07;
  91         int mask = (kcontrol->private_value >> 24) & 0xff;
  92         int invert = (kcontrol->private_value >> 22) & 1;
  93         int val;
  94
  95         mutex_lock(&ak4531->reg_mutex);
  96         val = (ak4531->regs[reg] >> shift) & mask;
  97         mutex_unlock(&ak4531->reg_mutex);
  98         if (invert) {
  99                 val = mask - val;
 100         }
 101         ucontrol->value.integer.value[0] = val;
 102         return 0;
 103 }
 104
 105 static int snd_ak4531_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 106 {
 107         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 108         int reg = kcontrol->private_value & 0xff;
 109         int shift = (kcontrol->private_value >> 16) & 0x07;
 110         int mask = (kcontrol->private_value >> 24) & 0xff;
 111         int invert = (kcontrol->private_value >> 22) & 1;
 112         int change;
 113         int val;
 114
 115         val = ucontrol->value.integer.value[0] & mask;
 116         if (invert) {
 117                 val = mask - val;
 118         }
 119         val <<= shift;
 120         mutex_lock(&ak4531->reg_mutex);
 121         val = (ak4531->regs[reg] & ~(mask << shift)) | val;
 122         change = val != ak4531->regs[reg];
 123         ak4531->write(ak4531, reg, ak4531->regs[reg] = val);
 124         mutex_unlock(&ak4531->reg_mutex);
 125         return change;
 126 }
 127
 128 #define AK4531_DOUBLE(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert) \
 129 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 130   .info = snd_ak4531_info_double, \
 131   .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
 132   .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22) }
 133 #define AK4531_DOUBLE_TLV(xname, xindex, left_reg, right_reg, left_shift, right_shift, mask, invert, xtlv) \
 134 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
 135   .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
 136   .name = xname, .index = xindex, \
 137   .info = snd_ak4531_info_double, \
 138   .get = snd_ak4531_get_double, .put = snd_ak4531_put_double, \
 139   .private_value = left_reg | (right_reg << 8) | (left_shift << 16) | (right_shift << 19) | (mask << 24) | (invert << 22), \
 140   .tlv = { .p = (xtlv) } }
 141
 142 static int snd_ak4531_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 143 {
 144         int mask = (kcontrol->private_value >> 24) & 0xff;
 145
 146         uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
 147         uinfo->count = 2;
 148         uinfo->value.integer.min = 0;
 149         uinfo->value.integer.max = mask;
 150         return 0;
 151 }
 152
 153 static int snd_ak4531_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 154 {
 155         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 156         int left_reg = kcontrol->private_value & 0xff;
 157         int right_reg = (kcontrol->private_value >> 8) & 0xff;
 158         int left_shift = (kcontrol->private_value >> 16) & 0x07;
 159         int right_shift = (kcontrol->private_value >> 19) & 0x07;
 160         int mask = (kcontrol->private_value >> 24) & 0xff;
 161         int invert = (kcontrol->private_value >> 22) & 1;
 162         int left, right;
 163
 164         mutex_lock(&ak4531->reg_mutex);
 165         left = (ak4531->regs[left_reg] >> left_shift) & mask;
 166         right = (ak4531->regs[right_reg] >> right_shift) & mask;
 167         mutex_unlock(&ak4531->reg_mutex);
 168         if (invert) {
 169                 left = mask - left;
 170                 right = mask - right;
 171         }
 172         ucontrol->value.integer.value[0] = left;
 173         ucontrol->value.integer.value[1] = right;
 174         return 0;
 175 }
 176
 177 static int snd_ak4531_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 178 {
 179         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 180         int left_reg = kcontrol->private_value & 0xff;
 181         int right_reg = (kcontrol->private_value >> 8) & 0xff;
 182         int left_shift = (kcontrol->private_value >> 16) & 0x07;
 183         int right_shift = (kcontrol->private_value >> 19) & 0x07;
 184         int mask = (kcontrol->private_value >> 24) & 0xff;
 185         int invert = (kcontrol->private_value >> 22) & 1;
 186         int change;
 187         int left, right;
 188
 189         left = ucontrol->value.integer.value[0] & mask;
 190         right = ucontrol->value.integer.value[1] & mask;
 191         if (invert) {
 192                 left = mask - left;
 193                 right = mask - right;
 194         }
 195         left <<= left_shift;
 196         right <<= right_shift;
 197         mutex_lock(&ak4531->reg_mutex);
 198         if (left_reg == right_reg) {
 199                 left = (ak4531->regs[left_reg] & ~((mask << left_shift) | (mask << right_shift))) | left | right;
 200                 change = left != ak4531->regs[left_reg];
 201                 ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
 202         } else {
 203                 left = (ak4531->regs[left_reg] & ~(mask << left_shift)) | left;
 204                 right = (ak4531->regs[right_reg] & ~(mask << right_shift)) | right;
 205                 change = left != ak4531->regs[left_reg] || right != ak4531->regs[right_reg];
 206                 ak4531->write(ak4531, left_reg, ak4531->regs[left_reg] = left);
 207                 ak4531->write(ak4531, right_reg, ak4531->regs[right_reg] = right);
 208         }
 209         mutex_unlock(&ak4531->reg_mutex);
 210         return change;
 211 }
 212
 213 #define AK4531_INPUT_SW(xname, xindex, reg1, reg2, left_shift, right_shift) \
 214 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 215   .info = snd_ak4531_info_input_sw, \
 216   .get = snd_ak4531_get_input_sw, .put = snd_ak4531_put_input_sw, \
 217   .private_value = reg1 | (reg2 << 8) | (left_shift << 16) | (right_shift << 24) }
 218
 219 static int snd_ak4531_info_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 220 {
 221         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 222         uinfo->count = 4;
 223         uinfo->value.integer.min = 0;
 224         uinfo->value.integer.max = 1;
 225         return 0;
 226 }
 227
 228 static int snd_ak4531_get_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 229 {
 230         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 231         int reg1 = kcontrol->private_value & 0xff;
 232         int reg2 = (kcontrol->private_value >> 8) & 0xff;
 233         int left_shift = (kcontrol->private_value >> 16) & 0x0f;
 234         int right_shift = (kcontrol->private_value >> 24) & 0x0f;
 235
 236         mutex_lock(&ak4531->reg_mutex);
 237         ucontrol->value.integer.value[0] = (ak4531->regs[reg1] >> left_shift) & 1;
 238         ucontrol->value.integer.value[1] = (ak4531->regs[reg2] >> left_shift) & 1;
 239         ucontrol->value.integer.value[2] = (ak4531->regs[reg1] >> right_shift) & 1;
 240         ucontrol->value.integer.value[3] = (ak4531->regs[reg2] >> right_shift) & 1;
 241         mutex_unlock(&ak4531->reg_mutex);
 242         return 0;
 243 }
 244
 245 static int snd_ak4531_put_input_sw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 246 {
 247         struct snd_ak4531 *ak4531 = snd_kcontrol_chip(kcontrol);
 248         int reg1 = kcontrol->private_value & 0xff;
 249         int reg2 = (kcontrol->private_value >> 8) & 0xff;
 250         int left_shift = (kcontrol->private_value >> 16) & 0x0f;
 251         int right_shift = (kcontrol->private_value >> 24) & 0x0f;
 252         int change;
 253         int val1, val2;
 254
 255         mutex_lock(&ak4531->reg_mutex);
 256         val1 = ak4531->regs[reg1] & ~((1 << left_shift) | (1 << right_shift));
 257         val2 = ak4531->regs[reg2] & ~((1 << left_shift) | (1 << right_shift));
 258         val1 |= (ucontrol->value.integer.value[0] & 1) << left_shift;
 259         val2 |= (ucontrol->value.integer.value[1] & 1) << left_shift;
 260         val1 |= (ucontrol->value.integer.value[2] & 1) << right_shift;
 261         val2 |= (ucontrol->value.integer.value[3] & 1) << right_shift;
 262         change = val1 != ak4531->regs[reg1] || val2 != ak4531->regs[reg2];
 263         ak4531->write(ak4531, reg1, ak4531->regs[reg1] = val1);
 264         ak4531->write(ak4531, reg2, ak4531->regs[reg2] = val2);
 265         mutex_unlock(&ak4531->reg_mutex);
 266         return change;
 267 }
 268
 269 static const DECLARE_TLV_DB_SCALE(db_scale_master, -6200, 200, 0);
 270 static const DECLARE_TLV_DB_SCALE(db_scale_mono, -2800, 400, 0);
 271 static const DECLARE_TLV_DB_SCALE(db_scale_input, -5000, 200, 0);
 272
 273 static struct snd_kcontrol_new snd_ak4531_controls[] = {
 274
 275 AK4531_DOUBLE_TLV("Master Playback Switch", 0,
 276                   AK4531_LMASTER, AK4531_RMASTER, 7, 7, 1, 1,
 277                   db_scale_master),
 278 AK4531_DOUBLE("Master Playback Volume", 0, AK4531_LMASTER, AK4531_RMASTER, 0, 0, 0x1f, 1),
 279
 280 AK4531_SINGLE_TLV("Master Mono Playback Switch", 0, AK4531_MONO_OUT, 7, 1, 1,
 281                   db_scale_mono),
 282 AK4531_SINGLE("Master Mono Playback Volume", 0, AK4531_MONO_OUT, 0, 0x07, 1),
 283
 284 AK4531_DOUBLE("PCM Switch", 0, AK4531_LVOICE, AK4531_RVOICE, 7, 7, 1, 1),
 285 AK4531_DOUBLE_TLV("PCM Volume", 0, AK4531_LVOICE, AK4531_RVOICE, 0, 0, 0x1f, 1,
 286                   db_scale_input),
 287 AK4531_DOUBLE("PCM Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 3, 2, 1, 0),
 288 AK4531_DOUBLE("PCM Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 2, 2, 1, 0),
 289
 290 AK4531_DOUBLE("PCM Switch", 1, AK4531_LFM, AK4531_RFM, 7, 7, 1, 1),
 291 AK4531_DOUBLE_TLV("PCM Volume", 1, AK4531_LFM, AK4531_RFM, 0, 0, 0x1f, 1,
 292                   db_scale_input),
 293 AK4531_DOUBLE("PCM Playback Switch", 1, AK4531_OUT_SW1, AK4531_OUT_SW1, 6, 5, 1, 0),
 294 AK4531_INPUT_SW("PCM Capture Route", 1, AK4531_LIN_SW1, AK4531_RIN_SW1, 6, 5),
 295
 296 AK4531_DOUBLE("CD Switch", 0, AK4531_LCD, AK4531_RCD, 7, 7, 1, 1),
 297 AK4531_DOUBLE_TLV("CD Volume", 0, AK4531_LCD, AK4531_RCD, 0, 0, 0x1f, 1,
 298                   db_scale_input),
 299 AK4531_DOUBLE("CD Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 2, 1, 1, 0),
 300 AK4531_INPUT_SW("CD Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 2, 1),
 301
 302 AK4531_DOUBLE("Line Switch", 0, AK4531_LLINE, AK4531_RLINE, 7, 7, 1, 1),
 303 AK4531_DOUBLE_TLV("Line Volume", 0, AK4531_LLINE, AK4531_RLINE, 0, 0, 0x1f, 1,
 304                   db_scale_input),
 305 AK4531_DOUBLE("Line Playback Switch", 0, AK4531_OUT_SW1, AK4531_OUT_SW1, 4, 3, 1, 0),
 306 AK4531_INPUT_SW("Line Capture Route", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 4, 3),
 307
 308 AK4531_DOUBLE("Aux Switch", 0, AK4531_LAUXA, AK4531_RAUXA, 7, 7, 1, 1),
 309 AK4531_DOUBLE_TLV("Aux Volume", 0, AK4531_LAUXA, AK4531_RAUXA, 0, 0, 0x1f, 1,
 310                   db_scale_input),
 311 AK4531_DOUBLE("Aux Playback Switch", 0, AK4531_OUT_SW2, AK4531_OUT_SW2, 5, 4, 1, 0),
 312 AK4531_INPUT_SW("Aux Capture Route", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 4, 3),
 313
 314 AK4531_SINGLE("Mono Switch", 0, AK4531_MONO1, 7, 1, 1),
 315 AK4531_SINGLE_TLV("Mono Volume", 0, AK4531_MONO1, 0, 0x1f, 1, db_scale_input),
 316 AK4531_SINGLE("Mono Playback Switch", 0, AK4531_OUT_SW2, 0, 1, 0),
 317 AK4531_DOUBLE("Mono Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 0, 0, 1, 0),
 318
 319 AK4531_SINGLE("Mono Switch", 1, AK4531_MONO2, 7, 1, 1),
 320 AK4531_SINGLE_TLV("Mono Volume", 1, AK4531_MONO2, 0, 0x1f, 1, db_scale_input),
 321 AK4531_SINGLE("Mono Playback Switch", 1, AK4531_OUT_SW2, 1, 1, 0),
 322 AK4531_DOUBLE("Mono Capture Switch", 1, AK4531_LIN_SW2, AK4531_RIN_SW2, 1, 1, 1, 0),
 323
 324 AK4531_SINGLE_TLV("Mic Volume", 0, AK4531_MIC, 0, 0x1f, 1, db_scale_input),
 325 AK4531_SINGLE("Mic Switch", 0, AK4531_MIC, 7, 1, 1),
 326 AK4531_SINGLE("Mic Playback Switch", 0, AK4531_OUT_SW1, 0, 1, 0),
 327 AK4531_DOUBLE("Mic Capture Switch", 0, AK4531_LIN_SW1, AK4531_RIN_SW1, 0, 0, 1, 0),
 328
 329 AK4531_DOUBLE("Mic Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 7, 7, 1, 0),
 330 AK4531_DOUBLE("Mono1 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 6, 6, 1, 0),
 331 AK4531_DOUBLE("Mono2 Bypass Capture Switch", 0, AK4531_LIN_SW2, AK4531_RIN_SW2, 5, 5, 1, 0),
 332
 333 AK4531_SINGLE("AD Input Select", 0, AK4531_AD_IN, 0, 1, 0),
 334 AK4531_SINGLE("Mic Boost (+30dB)", 0, AK4531_MIC_GAIN, 0, 1, 0)
 335 };
 336
 337 static int snd_ak4531_free(struct snd_ak4531 *ak4531)
 338 {
 339         if (ak4531) {
 340                 if (ak4531->private_free)
 341                         ak4531->private_free(ak4531);
 342                 kfree(ak4531);
 343         }
 344         return 0;
 345 }
 346
 347 static int snd_ak4531_dev_free(struct snd_device *device)
 348 {
 349         struct snd_ak4531 *ak4531 = device->device_data;
 350         return snd_ak4531_free(ak4531);
 351 }
 352
 353 static u8 snd_ak4531_initial_map[0x19 + 1] = {
 354         0x9f,           /* 00: Master Volume Lch */
 355         0x9f,           /* 01: Master Volume Rch */
 356         0x9f,           /* 02: Voice Volume Lch */
 357         0x9f,           /* 03: Voice Volume Rch */
 358         0x9f,           /* 04: FM Volume Lch */
 359         0x9f,           /* 05: FM Volume Rch */
 360         0x9f,           /* 06: CD Audio Volume Lch */
 361         0x9f,           /* 07: CD Audio Volume Rch */
 362         0x9f,           /* 08: Line Volume Lch */
 363         0x9f,           /* 09: Line Volume Rch */
 364         0x9f,           /* 0a: Aux Volume Lch */
 365         0x9f,           /* 0b: Aux Volume Rch */
 366         0x9f,           /* 0c: Mono1 Volume */
 367         0x9f,           /* 0d: Mono2 Volume */
 368         0x9f,           /* 0e: Mic Volume */
 369         0x87,           /* 0f: Mono-out Volume */
 370         0x00,           /* 10: Output Mixer SW1 */
 371         0x00,           /* 11: Output Mixer SW2 */
 372         0x00,           /* 12: Lch Input Mixer SW1 */
 373         0x00,           /* 13: Rch Input Mixer SW1 */
 374         0x00,           /* 14: Lch Input Mixer SW2 */
 375         0x00,           /* 15: Rch Input Mixer SW2 */
 376         0x00,           /* 16: Reset & Power Down */
 377         0x00,           /* 17: Clock Select */
 378         0x00,           /* 18: AD Input Select */
 379         0x01            /* 19: Mic Amp Setup */
 380 };
 381
 382 int snd_ak4531_mixer(struct snd_card *card, struct snd_ak4531 *_ak4531,
 383                      struct snd_ak4531 **rak4531)
 384 {
 385         unsigned int idx;
 386         int err;
 387         struct snd_ak4531 *ak4531;
 388         static struct snd_device_ops ops = {
 389                 .dev_free =     snd_ak4531_dev_free,
 390         };
 391
 392         snd_assert(rak4531 != NULL, return -EINVAL);
 393         *rak4531 = NULL;
 394         snd_assert(card != NULL && _ak4531 != NULL, return -EINVAL);
 395         ak4531 = kzalloc(sizeof(*ak4531), GFP_KERNEL);
 396         if (ak4531 == NULL)
 397                 return -ENOMEM;
 398         *ak4531 = *_ak4531;
 399         mutex_init(&ak4531->reg_mutex);
 400         if ((err = snd_component_add(card, "AK4531")) < 0) {
 401                 snd_ak4531_free(ak4531);
 402                 return err;
 403         }
 404         strcpy(card->mixername, "Asahi Kasei AK4531");
 405         ak4531->write(ak4531, AK4531_RESET, 0x03);      /* no RST, PD */
 406         udelay(100);
 407         ak4531->write(ak4531, AK4531_CLOCK, 0x00);      /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */
 408         for (idx = 0; idx <= 0x19; idx++) {
 409                 if (idx == AK4531_RESET || idx == AK4531_CLOCK)
 410                         continue;
 411                 ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]);    /* recording source is mixer */
 412         }
 413         for (idx = 0; idx < ARRAY_SIZE(snd_ak4531_controls); idx++) {
 414                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_ak4531_controls[idx], ak4531))) < 0) {
 415                         snd_ak4531_free(ak4531);
 416                         return err;
 417                 }
 418         }
 419         snd_ak4531_proc_init(card, ak4531);
 420         if ((err = snd_device_new(card, SNDRV_DEV_CODEC, ak4531, &ops)) < 0) {
 421                 snd_ak4531_free(ak4531);
 422                 return err;
 423         }
 424
 425 #if 0
 426         snd_ak4531_dump(ak4531);
 427 #endif
 428         *rak4531 = ak4531;
 429         return 0;
 430 }
 431
 432 /*
 433  * power management
 434  */
 435 #ifdef CONFIG_PM
 436 void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
 437 {
 438         /* mute */
 439         ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
 440         ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
 441         /* powerdown */
 442         ak4531->write(ak4531, AK4531_RESET, 0x01);
 443 }
 444
 445 void snd_ak4531_resume(struct snd_ak4531 *ak4531)
 446 {
 447         int idx;
 448
 449         /* initialize */
 450         ak4531->write(ak4531, AK4531_RESET, 0x03);
 451         udelay(100);
 452         ak4531->write(ak4531, AK4531_CLOCK, 0x00);
 453         /* restore mixer registers */
 454         for (idx = 0; idx <= 0x19; idx++) {
 455                 if (idx == AK4531_RESET || idx == AK4531_CLOCK)
 456                         continue;
 457                 ak4531->write(ak4531, idx, ak4531->regs[idx]);
 458         }
 459 }
 460 #endif
 461
 462 #ifdef CONFIG_PROC_FS
 463 /*
 464  * /proc interface
 465  */
 466
 467 static void snd_ak4531_proc_read(struct snd_info_entry *entry,
 468                                  struct snd_info_buffer *buffer)
 469 {
 470         struct snd_ak4531 *ak4531 = entry->private_data;
 471
 472         snd_iprintf(buffer, "Asahi Kasei AK4531\n\n");
 473         snd_iprintf(buffer, "Recording source   : %s\n"
 474                     "MIC gain           : %s\n",
 475                     ak4531->regs[AK4531_AD_IN] & 1 ? "external" : "mixer",
 476                     ak4531->regs[AK4531_MIC_GAIN] & 1 ? "+30dB" : "+0dB");
 477 }
 478
 479 static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak4531)
 480 {
 481         struct snd_info_entry *entry;
 482
 483         if (! snd_card_proc_new(card, "ak4531", &entry))
 484                 snd_info_set_text_ops(entry, ak4531, snd_ak4531_proc_read);
 485 }
 486 #endif
 487
 488 EXPORT_SYMBOL(snd_ak4531_mixer);
 489 #ifdef CONFIG_PM
 490 EXPORT_SYMBOL(snd_ak4531_suspend);
 491 EXPORT_SYMBOL(snd_ak4531_resume);
 492 #endif
 493
 494 /*
 495  *  INIT part
 496  */
 497
 498 static int __init alsa_ak4531_init(void)
 499 {
 500         return 0;
 501 }
 502
 503 static void __exit alsa_ak4531_exit(void)
 504 {
 505 }
 506
 507 module_init(alsa_ak4531_init)
 508 module_exit(alsa_ak4531_exit)