sound/i2c/other/ak4xxx-adda.c

   1 /*
   2  *   ALSA driver for AK4524 / AK4528 / AK4529 / AK4355 / AK4358 / AK4381
   3  *   AD and DA converters
   4  *
   5  *      Copyright (c) 2000-2004 Jaroslav Kysela <perex@suse.cz>,
   6  *                              Takashi Iwai <tiwai@suse.de>
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  *
  22  */
  23
  24 #include <sound/driver.h>
  25 #include <asm/io.h>
  26 #include <linux/delay.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/init.h>
  29 #include <sound/core.h>
  30 #include <sound/control.h>
  31 #include <sound/ak4xxx-adda.h>
  32
  33 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Takashi Iwai <tiwai@suse.de>");
  34 MODULE_DESCRIPTION("Routines for control of AK452x / AK43xx  AD/DA converters");
  35 MODULE_LICENSE("GPL");
  36
  37 void snd_akm4xxx_write(akm4xxx_t *ak, int chip, unsigned char reg, unsigned char val)
  38 {
  39         ak->ops.lock(ak, chip);
  40         ak->ops.write(ak, chip, reg, val);
  41
  42         /* save the data */
  43         if (ak->type == SND_AK4524 || ak->type == SND_AK4528) {
  44                 if ((reg != 0x04 && reg != 0x05) || (val & 0x80) == 0)
  45                         snd_akm4xxx_set(ak, chip, reg, val);
  46                 else
  47                         snd_akm4xxx_set_ipga(ak, chip, reg, val);
  48         } else {
  49                 /* AK4529, or else */
  50                 snd_akm4xxx_set(ak, chip, reg, val);
  51         }
  52         ak->ops.unlock(ak, chip);
  53 }
  54
  55 /*
  56  * reset the AKM codecs
  57  * @state: 1 = reset codec, 0 = restore the registers
  58  *
  59  * assert the reset operation and restores the register values to the chips.
  60  */
  61 void snd_akm4xxx_reset(akm4xxx_t *ak, int state)
  62 {
  63         unsigned int chip;
  64         unsigned char reg;
  65
  66         switch (ak->type) {
  67         case SND_AK4524:
  68         case SND_AK4528:
  69                 for (chip = 0; chip < ak->num_dacs/2; chip++) {
  70                         snd_akm4xxx_write(ak, chip, 0x01, state ? 0x00 : 0x03);
  71                         if (state)
  72                                 continue;
  73                         /* DAC volumes */
  74                         for (reg = 0x04; reg < (ak->type == SND_AK4528 ? 0x06 : 0x08); reg++)
  75                                 snd_akm4xxx_write(ak, chip, reg, snd_akm4xxx_get(ak, chip, reg));
  76                         if (ak->type == SND_AK4528)
  77                                 continue;
  78                         /* IPGA */
  79                         for (reg = 0x04; reg < 0x06; reg++)
  80                                 snd_akm4xxx_write(ak, chip, reg, snd_akm4xxx_get_ipga(ak, chip, reg));
  81                 }
  82                 break;
  83         case SND_AK4529:
  84                 /* FIXME: needed for ak4529? */
  85                 break;
  86         case SND_AK4355:
  87         case SND_AK4358:
  88                 if (state) {
  89                         snd_akm4xxx_write(ak, 0, 0x01, 0x02); /* reset and soft-mute */
  90                         return;
  91                 }
  92                 for (reg = 0x00; reg < 0x0b; reg++)
  93                         if (reg != 0x01)
  94                                 snd_akm4xxx_write(ak, 0, reg, snd_akm4xxx_get(ak, 0, reg));
  95                 snd_akm4xxx_write(ak, 0, 0x01, 0x01); /* un-reset, unmute */
  96                 break;
  97         case SND_AK4381:
  98                 for (chip = 0; chip < ak->num_dacs/2; chip++) {
  99                         snd_akm4xxx_write(ak, chip, 0x00, state ? 0x0c : 0x0f);
 100                         if (state)
 101                                 continue;
 102                         for (reg = 0x01; reg < 0x05; reg++)
 103                                 snd_akm4xxx_write(ak, chip, reg, snd_akm4xxx_get(ak, chip, reg));
 104                 }
 105                 break;
 106         }
 107 }
 108
 109 /*
 110  * initialize all the ak4xxx chips
 111  */
 112 void snd_akm4xxx_init(akm4xxx_t *ak)
 113 {
 114         static unsigned char inits_ak4524[] = {
 115                 0x00, 0x07, /* 0: all power up */
 116                 0x01, 0x00, /* 1: ADC/DAC reset */
 117                 0x02, 0x60, /* 2: 24bit I2S */
 118                 0x03, 0x19, /* 3: deemphasis off */
 119                 0x01, 0x03, /* 1: ADC/DAC enable */
 120                 0x04, 0x00, /* 4: ADC left muted */
 121                 0x05, 0x00, /* 5: ADC right muted */
 122                 0x04, 0x80, /* 4: ADC IPGA gain 0dB */
 123                 0x05, 0x80, /* 5: ADC IPGA gain 0dB */
 124                 0x06, 0x00, /* 6: DAC left muted */
 125                 0x07, 0x00, /* 7: DAC right muted */
 126                 0xff, 0xff
 127         };
 128         static unsigned char inits_ak4528[] = {
 129                 0x00, 0x07, /* 0: all power up */
 130                 0x01, 0x00, /* 1: ADC/DAC reset */
 131                 0x02, 0x60, /* 2: 24bit I2S */
 132                 0x03, 0x0d, /* 3: deemphasis off, turn LR highpass filters on */
 133                 0x01, 0x03, /* 1: ADC/DAC enable */
 134                 0x04, 0x00, /* 4: ADC left muted */
 135                 0x05, 0x00, /* 5: ADC right muted */
 136                 0xff, 0xff
 137         };
 138         static unsigned char inits_ak4529[] = {
 139                 0x09, 0x01, /* 9: ATS=0, RSTN=1 */
 140                 0x0a, 0x3f, /* A: all power up, no zero/overflow detection */
 141                 0x00, 0x0c, /* 0: TDM=0, 24bit I2S, SMUTE=0 */
 142                 0x01, 0x00, /* 1: ACKS=0, ADC, loop off */
 143                 0x02, 0xff, /* 2: LOUT1 muted */
 144                 0x03, 0xff, /* 3: ROUT1 muted */
 145                 0x04, 0xff, /* 4: LOUT2 muted */
 146                 0x05, 0xff, /* 5: ROUT2 muted */
 147                 0x06, 0xff, /* 6: LOUT3 muted */
 148                 0x07, 0xff, /* 7: ROUT3 muted */
 149                 0x0b, 0xff, /* B: LOUT4 muted */
 150                 0x0c, 0xff, /* C: ROUT4 muted */
 151                 0x08, 0x55, /* 8: deemphasis all off */
 152                 0xff, 0xff
 153         };
 154         static unsigned char inits_ak4355[] = {
 155                 0x01, 0x02, /* 1: reset and soft-mute */
 156                 0x00, 0x06, /* 0: mode3(i2s), disable auto-clock detect, disable DZF, sharp roll-off, RSTN#=0 */
 157                 0x02, 0x0e, /* 2: DA's power up, normal speed, RSTN#=0 */
 158                 // 0x02, 0x2e, /* quad speed */
 159                 0x03, 0x01, /* 3: de-emphasis off */
 160                 0x04, 0x00, /* 4: LOUT1 volume muted */
 161                 0x05, 0x00, /* 5: ROUT1 volume muted */
 162                 0x06, 0x00, /* 6: LOUT2 volume muted */
 163                 0x07, 0x00, /* 7: ROUT2 volume muted */
 164                 0x08, 0x00, /* 8: LOUT3 volume muted */
 165                 0x09, 0x00, /* 9: ROUT3 volume muted */
 166                 0x0a, 0x00, /* a: DATT speed=0, ignore DZF */
 167                 0x01, 0x01, /* 1: un-reset, unmute */
 168                 0xff, 0xff
 169         };
 170         static unsigned char inits_ak4358[] = {
 171                 0x01, 0x02, /* 1: reset and soft-mute */
 172                 0x00, 0x06, /* 0: mode3(i2s), disable auto-clock detect, disable DZF, sharp roll-off, RSTN#=0 */
 173                 0x02, 0x0e, /* 2: DA's power up, normal speed, RSTN#=0 */
 174                 // 0x02, 0x2e, /* quad speed */
 175                 0x03, 0x01, /* 3: de-emphasis off */
 176                 0x04, 0x00, /* 4: LOUT1 volume muted */
 177                 0x05, 0x00, /* 5: ROUT1 volume muted */
 178                 0x06, 0x00, /* 6: LOUT2 volume muted */
 179                 0x07, 0x00, /* 7: ROUT2 volume muted */
 180                 0x08, 0x00, /* 8: LOUT3 volume muted */
 181                 0x09, 0x00, /* 9: ROUT3 volume muted */
 182                 0x0b, 0x00, /* b: LOUT4 volume muted */
 183                 0x0c, 0x00, /* c: ROUT4 volume muted */
 184                 0x0a, 0x00, /* a: DATT speed=0, ignore DZF */
 185                 0x01, 0x01, /* 1: un-reset, unmute */
 186                 0xff, 0xff
 187         };
 188         static unsigned char inits_ak4381[] = {
 189                 0x00, 0x0c, /* 0: mode3(i2s), disable auto-clock detect */
 190                 0x01, 0x02, /* 1: de-emphasis off, normal speed, sharp roll-off, DZF off */
 191                 // 0x01, 0x12, /* quad speed */
 192                 0x02, 0x00, /* 2: DZF disabled */
 193                 0x03, 0x00, /* 3: LATT 0 */
 194                 0x04, 0x00, /* 4: RATT 0 */
 195                 0x00, 0x0f, /* 0: power-up, un-reset */
 196                 0xff, 0xff
 197         };
 198
 199         int chip, num_chips;
 200         unsigned char *ptr, reg, data, *inits;
 201
 202         switch (ak->type) {
 203         case SND_AK4524:
 204                 inits = inits_ak4524;
 205                 num_chips = ak->num_dacs / 2;
 206                 break;
 207         case SND_AK4528:
 208                 inits = inits_ak4528;
 209                 num_chips = ak->num_dacs / 2;
 210                 break;
 211         case SND_AK4529:
 212                 inits = inits_ak4529;
 213                 num_chips = 1;
 214                 break;
 215         case SND_AK4355:
 216                 inits = inits_ak4355;
 217                 num_chips = 1;
 218                 break;
 219         case SND_AK4358:
 220                 inits = inits_ak4358;
 221                 num_chips = 1;
 222                 break;
 223         case SND_AK4381:
 224                 inits = inits_ak4381;
 225                 num_chips = ak->num_dacs / 2;
 226                 break;
 227         default:
 228                 snd_BUG();
 229                 return;
 230         }
 231
 232         for (chip = 0; chip < num_chips; chip++) {
 233                 ptr = inits;
 234                 while (*ptr != 0xff) {
 235                         reg = *ptr++;
 236                         data = *ptr++;
 237                         snd_akm4xxx_write(ak, chip, reg, data);
 238                 }
 239         }
 240 }
 241
 242 #define AK_GET_CHIP(val)                (((val) >> 8) & 0xff)
 243 #define AK_GET_ADDR(val)                ((val) & 0xff)
 244 #define AK_GET_SHIFT(val)               (((val) >> 16) & 0x7f)
 245 #define AK_GET_INVERT(val)              (((val) >> 23) & 1)
 246 #define AK_GET_MASK(val)                (((val) >> 24) & 0xff)
 247 #define AK_COMPOSE(chip,addr,shift,mask) (((chip) << 8) | (addr) | ((shift) << 16) | ((mask) << 24))
 248 #define AK_INVERT                       (1<<23)
 249
 250 static int snd_akm4xxx_volume_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
 251 {
 252         unsigned int mask = AK_GET_MASK(kcontrol->private_value);
 253
 254         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 255         uinfo->count = 1;
 256         uinfo->value.integer.min = 0;
 257         uinfo->value.integer.max = mask;
 258         return 0;
 259 }
 260
 261 static int snd_akm4xxx_volume_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 262 {
 263         akm4xxx_t *ak = snd_kcontrol_chip(kcontrol);
 264         int chip = AK_GET_CHIP(kcontrol->private_value);
 265         int addr = AK_GET_ADDR(kcontrol->private_value);
 266         int invert = AK_GET_INVERT(kcontrol->private_value);
 267         unsigned int mask = AK_GET_MASK(kcontrol->private_value);
 268         unsigned char val = snd_akm4xxx_get(ak, chip, addr);
 269
 270         ucontrol->value.integer.value[0] = invert ? mask - val : val;
 271         return 0;
 272 }
 273
 274 static int snd_akm4xxx_volume_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 275 {
 276         akm4xxx_t *ak = snd_kcontrol_chip(kcontrol);
 277         int chip = AK_GET_CHIP(kcontrol->private_value);
 278         int addr = AK_GET_ADDR(kcontrol->private_value);
 279         int invert = AK_GET_INVERT(kcontrol->private_value);
 280         unsigned int mask = AK_GET_MASK(kcontrol->private_value);
 281         unsigned char nval = ucontrol->value.integer.value[0] % (mask+1);
 282         int change;
 283
 284         if (invert)
 285                 nval = mask - nval;
 286         change = snd_akm4xxx_get(ak, chip, addr) != nval;
 287         if (change)
 288                 snd_akm4xxx_write(ak, chip, addr, nval);
 289         return change;
 290 }
 291
 292 static int snd_akm4xxx_ipga_gain_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
 293 {
 294         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 295         uinfo->count = 1;
 296         uinfo->value.integer.min = 0;
 297         uinfo->value.integer.max = 36;
 298         return 0;
 299 }
 300
 301 static int snd_akm4xxx_ipga_gain_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 302 {
 303         akm4xxx_t *ak = snd_kcontrol_chip(kcontrol);
 304         int chip = AK_GET_CHIP(kcontrol->private_value);
 305         int addr = AK_GET_ADDR(kcontrol->private_value);
 306         ucontrol->value.integer.value[0] = snd_akm4xxx_get_ipga(ak, chip, addr) & 0x7f;
 307         return 0;
 308 }
 309
 310 static int snd_akm4xxx_ipga_gain_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 311 {
 312         akm4xxx_t *ak = snd_kcontrol_chip(kcontrol);
 313         int chip = AK_GET_CHIP(kcontrol->private_value);
 314         int addr = AK_GET_ADDR(kcontrol->private_value);
 315         unsigned char nval = (ucontrol->value.integer.value[0] % 37) | 0x80;
 316         int change = snd_akm4xxx_get_ipga(ak, chip, addr) != nval;
 317         if (change)
 318                 snd_akm4xxx_write(ak, chip, addr, nval);
 319         return change;
 320 }
 321
 322 static int snd_akm4xxx_deemphasis_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
 323 {
 324         static char *texts[4] = {
 325                 "44.1kHz", "Off", "48kHz", "32kHz",
 326         };
 327         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 328         uinfo->count = 1;
 329         uinfo->value.enumerated.items = 4;
 330         if (uinfo->value.enumerated.item >= 4)
 331                 uinfo->value.enumerated.item = 3;
 332         strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
 333         return 0;
 334 }
 335
 336 static int snd_akm4xxx_deemphasis_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t *ucontrol)
 337 {
 338         akm4xxx_t *ak = snd_kcontrol_chip(kcontrol);
 339         int chip = AK_GET_CHIP(kcontrol->private_value);
 340         int addr = AK_GET_ADDR(kcontrol->private_value);
 341         int shift = AK_GET_SHIFT(kcontrol->private_value);
 342         ucontrol->value.enumerated.item[0] = (snd_akm4xxx_get(ak, chip, addr) >> shift) & 3;
 343         return 0;
 344 }
 345
 346 static int snd_akm4xxx_deemphasis_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 347 {
 348         akm4xxx_t *ak = snd_kcontrol_chip(kcontrol);
 349         int chip = AK_GET_CHIP(kcontrol->private_value);
 350         int addr = AK_GET_ADDR(kcontrol->private_value);
 351         int shift = AK_GET_SHIFT(kcontrol->private_value);
 352         unsigned char nval = ucontrol->value.enumerated.item[0] & 3;
 353         int change;
 354
 355         nval = (nval << shift) | (snd_akm4xxx_get(ak, chip, addr) & ~(3 << shift));
 356         change = snd_akm4xxx_get(ak, chip, addr) != nval;
 357         if (change)
 358                 snd_akm4xxx_write(ak, chip, addr, nval);
 359         return change;
 360 }
 361
 362 /*
 363  * build AK4xxx controls
 364  */
 365
 366 int snd_akm4xxx_build_controls(akm4xxx_t *ak)
 367 {
 368         unsigned int idx, num_emphs;
 369         snd_kcontrol_t *ctl;
 370         int err;
 371
 372         ctl = kmalloc(sizeof(*ctl), GFP_KERNEL);
 373         if (! ctl)
 374                 return -ENOMEM;
 375
 376         for (idx = 0; idx < ak->num_dacs; ++idx) {
 377                 memset(ctl, 0, sizeof(*ctl));
 378                 strcpy(ctl->id.name, "DAC Volume");
 379                 ctl->id.index = idx + ak->idx_offset * 2;
 380                 ctl->id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 381                 ctl->count = 1;
 382                 ctl->info = snd_akm4xxx_volume_info;
 383                 ctl->get = snd_akm4xxx_volume_get;
 384                 ctl->put = snd_akm4xxx_volume_put;
 385                 switch (ak->type) {
 386                 case SND_AK4524:
 387                         ctl->private_value = AK_COMPOSE(idx/2, (idx%2) + 6, 0, 127); /* register 6 & 7 */
 388                         break;
 389                 case SND_AK4528:
 390                         ctl->private_value = AK_COMPOSE(idx/2, (idx%2) + 4, 0, 127); /* register 4 & 5 */
 391                         break;
 392                 case SND_AK4529: {
 393                         int val = idx < 6 ? idx + 2 : (idx - 6) + 0xb; /* registers 2-7 and b,c */
 394                         ctl->private_value = AK_COMPOSE(0, val, 0, 255) | AK_INVERT;
 395                         break;
 396                 }
 397                 case SND_AK4355:
 398                         ctl->private_value = AK_COMPOSE(0, idx + 4, 0, 255); /* register 4-9, chip #0 only */
 399                         break;
 400                 case SND_AK4358:
 401                         if (idx >= 6)
 402                                 ctl->private_value = AK_COMPOSE(0, idx + 5, 0, 255); /* register 4-9, chip #0 only */
 403                         else
 404                                 ctl->private_value = AK_COMPOSE(0, idx + 4, 0, 255); /* register 4-9, chip #0 only */
 405                         break;
 406                 case SND_AK4381:
 407                         ctl->private_value = AK_COMPOSE(idx/2, (idx%2) + 3, 0, 255); /* register 3 & 4 */
 408                         break;
 409                 default:
 410                         err = -EINVAL;
 411                         goto __error;
 412                 }
 413                 ctl->private_data = ak;
 414                 if ((err = snd_ctl_add(ak->card, snd_ctl_new(ctl, SNDRV_CTL_ELEM_ACCESS_READ|SNDRV_CTL_ELEM_ACCESS_WRITE))) < 0)
 415                         goto __error;
 416         }
 417         for (idx = 0; idx < ak->num_adcs && ak->type == SND_AK4524; ++idx) {
 418                 memset(ctl, 0, sizeof(*ctl));
 419                 strcpy(ctl->id.name, "ADC Volume");
 420                 ctl->id.index = idx + ak->idx_offset * 2;
 421                 ctl->id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 422                 ctl->count = 1;
 423                 ctl->info = snd_akm4xxx_volume_info;
 424                 ctl->get = snd_akm4xxx_volume_get;
 425                 ctl->put = snd_akm4xxx_volume_put;
 426                 ctl->private_value = AK_COMPOSE(idx/2, (idx%2) + 4, 0, 127); /* register 4 & 5 */
 427                 ctl->private_data = ak;
 428                 if ((err = snd_ctl_add(ak->card, snd_ctl_new(ctl, SNDRV_CTL_ELEM_ACCESS_READ|SNDRV_CTL_ELEM_ACCESS_WRITE))) < 0)
 429                         goto __error;
 430
 431                 memset(ctl, 0, sizeof(*ctl));
 432                 strcpy(ctl->id.name, "IPGA Analog Capture Volume");
 433                 ctl->id.index = idx + ak->idx_offset * 2;
 434                 ctl->id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 435                 ctl->count = 1;
 436                 ctl->info = snd_akm4xxx_ipga_gain_info;
 437                 ctl->get = snd_akm4xxx_ipga_gain_get;
 438                 ctl->put = snd_akm4xxx_ipga_gain_put;
 439                 ctl->private_value = AK_COMPOSE(idx/2, (idx%2) + 4, 0, 0); /* register 4 & 5 */
 440                 ctl->private_data = ak;
 441                 if ((err = snd_ctl_add(ak->card, snd_ctl_new(ctl, SNDRV_CTL_ELEM_ACCESS_READ|SNDRV_CTL_ELEM_ACCESS_WRITE))) < 0)
 442                         goto __error;
 443         }
 444         if (ak->type == SND_AK4355 || ak->type == SND_AK4358)
 445                 num_emphs = 1;
 446         else
 447                 num_emphs = ak->num_dacs / 2;
 448         for (idx = 0; idx < num_emphs; idx++) {
 449                 memset(ctl, 0, sizeof(*ctl));
 450                 strcpy(ctl->id.name, "Deemphasis");
 451                 ctl->id.index = idx + ak->idx_offset;
 452                 ctl->id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 453                 ctl->count = 1;
 454                 ctl->info = snd_akm4xxx_deemphasis_info;
 455                 ctl->get = snd_akm4xxx_deemphasis_get;
 456                 ctl->put = snd_akm4xxx_deemphasis_put;
 457                 switch (ak->type) {
 458                 case SND_AK4524:
 459                 case SND_AK4528:
 460                         ctl->private_value = AK_COMPOSE(idx, 3, 0, 0); /* register 3 */
 461                         break;
 462                 case SND_AK4529: {
 463                         int shift = idx == 3 ? 6 : (2 - idx) * 2;
 464                         ctl->private_value = AK_COMPOSE(0, 8, shift, 0); /* register 8 with shift */
 465                         break;
 466                 }
 467                 case SND_AK4355:
 468                 case SND_AK4358:
 469                         ctl->private_value = AK_COMPOSE(idx, 3, 0, 0);
 470                         break;
 471                 case SND_AK4381:
 472                         ctl->private_value = AK_COMPOSE(idx, 1, 1, 0);
 473                         break;
 474                 }
 475                 ctl->private_data = ak;
 476                 if ((err = snd_ctl_add(ak->card, snd_ctl_new(ctl, SNDRV_CTL_ELEM_ACCESS_READ|SNDRV_CTL_ELEM_ACCESS_WRITE))) < 0)
 477                         goto __error;
 478         }
 479         err = 0;
 480
 481  __error:
 482         kfree(ctl);
 483         return err;
 484 }
 485
 486 static int __init alsa_akm4xxx_module_init(void)
 487 {
 488         return 0;
 489 }
 490
 491 static void __exit alsa_akm4xxx_module_exit(void)
 492 {
 493 }
 494
 495 module_init(alsa_akm4xxx_module_init)
 496 module_exit(alsa_akm4xxx_module_exit)
 497
 498 EXPORT_SYMBOL(snd_akm4xxx_write);
 499 EXPORT_SYMBOL(snd_akm4xxx_reset);
 500 EXPORT_SYMBOL(snd_akm4xxx_init);
 501 EXPORT_SYMBOL(snd_akm4xxx_build_controls);