sound/soc/codecs/twl6040.c

   1 /*
   2  * ALSA SoC TWL6040 codec driver
   3  *
   4  * Author:       Misael Lopez Cruz <x0052729@ti.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/moduleparam.h>
  24 #include <linux/init.h>
  25 #include <linux/delay.h>
  26 #include <linux/pm.h>
  27 #include <linux/i2c.h>
  28 #include <linux/gpio.h>
  29 #include <linux/platform_device.h>
  30 #include <linux/slab.h>
  31 #include <linux/i2c/twl.h>
  32
  33 #include <sound/core.h>
  34 #include <sound/pcm.h>
  35 #include <sound/pcm_params.h>
  36 #include <sound/soc.h>
  37 #include <sound/soc-dapm.h>
  38 #include <sound/initval.h>
  39 #include <sound/tlv.h>
  40
  41 #include "twl6040.h"
  42
  43 #define TWL6040_RATES    (SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
  44 #define TWL6040_FORMATS  (SNDRV_PCM_FMTBIT_S32_LE)
  45
  46 /* codec private data */
  47 struct twl6040_data {
  48         int audpwron;
  49         int naudint;
  50         int codec_powered;
  51         int pll;
  52         int non_lp;
  53         unsigned int sysclk;
  54         struct snd_pcm_hw_constraint_list *sysclk_constraints;
  55         struct completion ready;
  56 };
  57
  58 /*
  59  * twl6040 register cache & default register settings
  60  */
  61 static const u8 twl6040_reg[TWL6040_CACHEREGNUM] = {
  62         0x00, /* not used               0x00    */
  63         0x4B, /* TWL6040_ASICID (ro)    0x01    */
  64         0x00, /* TWL6040_ASICREV (ro)   0x02    */
  65         0x00, /* TWL6040_INTID          0x03    */
  66         0x00, /* TWL6040_INTMR          0x04    */
  67         0x00, /* TWL6040_NCPCTRL        0x05    */
  68         0x00, /* TWL6040_LDOCTL         0x06    */
  69         0x60, /* TWL6040_HPPLLCTL       0x07    */
  70         0x00, /* TWL6040_LPPLLCTL       0x08    */
  71         0x4A, /* TWL6040_LPPLLDIV       0x09    */
  72         0x00, /* TWL6040_AMICBCTL       0x0A    */
  73         0x00, /* TWL6040_DMICBCTL       0x0B    */
  74         0x18, /* TWL6040_MICLCTL        0x0C    - No input selected on Left Mic */
  75         0x18, /* TWL6040_MICRCTL        0x0D    - No input selected on Right Mic */
  76         0x00, /* TWL6040_MICGAIN        0x0E    */
  77         0x1B, /* TWL6040_LINEGAIN       0x0F    */
  78         0x00, /* TWL6040_HSLCTL         0x10    */
  79         0x00, /* TWL6040_HSRCTL         0x11    */
  80         0x00, /* TWL6040_HSGAIN         0x12    */
  81         0x00, /* TWL6040_EARCTL         0x13    */
  82         0x00, /* TWL6040_HFLCTL         0x14    */
  83         0x00, /* TWL6040_HFLGAIN        0x15    */
  84         0x00, /* TWL6040_HFRCTL         0x16    */
  85         0x00, /* TWL6040_HFRGAIN        0x17    */
  86         0x00, /* TWL6040_VIBCTLL        0x18    */
  87         0x00, /* TWL6040_VIBDATL        0x19    */
  88         0x00, /* TWL6040_VIBCTLR        0x1A    */
  89         0x00, /* TWL6040_VIBDATR        0x1B    */
  90         0x00, /* TWL6040_HKCTL1         0x1C    */
  91         0x00, /* TWL6040_HKCTL2         0x1D    */
  92         0x00, /* TWL6040_GPOCTL         0x1E    */
  93         0x00, /* TWL6040_ALB            0x1F    */
  94         0x00, /* TWL6040_DLB            0x20    */
  95         0x00, /* not used               0x21    */
  96         0x00, /* not used               0x22    */
  97         0x00, /* not used               0x23    */
  98         0x00, /* not used               0x24    */
  99         0x00, /* not used               0x25    */
 100         0x00, /* not used               0x26    */
 101         0x00, /* not used               0x27    */
 102         0x00, /* TWL6040_TRIM1          0x28    */
 103         0x00, /* TWL6040_TRIM2          0x29    */
 104         0x00, /* TWL6040_TRIM3          0x2A    */
 105         0x00, /* TWL6040_HSOTRIM        0x2B    */
 106         0x00, /* TWL6040_HFOTRIM        0x2C    */
 107         0x09, /* TWL6040_ACCCTL         0x2D    */
 108         0x00, /* TWL6040_STATUS (ro)    0x2E    */
 109 };
 110
 111 /*
 112  * twl6040 vio/gnd registers:
 113  * registers under vio/gnd supply can be accessed
 114  * before the power-up sequence, after NRESPWRON goes high
 115  */
 116 static const int twl6040_vio_reg[TWL6040_VIOREGNUM] = {
 117         TWL6040_REG_ASICID,
 118         TWL6040_REG_ASICREV,
 119         TWL6040_REG_INTID,
 120         TWL6040_REG_INTMR,
 121         TWL6040_REG_NCPCTL,
 122         TWL6040_REG_LDOCTL,
 123         TWL6040_REG_AMICBCTL,
 124         TWL6040_REG_DMICBCTL,
 125         TWL6040_REG_HKCTL1,
 126         TWL6040_REG_HKCTL2,
 127         TWL6040_REG_GPOCTL,
 128         TWL6040_REG_TRIM1,
 129         TWL6040_REG_TRIM2,
 130         TWL6040_REG_TRIM3,
 131         TWL6040_REG_HSOTRIM,
 132         TWL6040_REG_HFOTRIM,
 133         TWL6040_REG_ACCCTL,
 134         TWL6040_REG_STATUS,
 135 };
 136
 137 /*
 138  * twl6040 vdd/vss registers:
 139  * registers under vdd/vss supplies can only be accessed
 140  * after the power-up sequence
 141  */
 142 static const int twl6040_vdd_reg[TWL6040_VDDREGNUM] = {
 143         TWL6040_REG_HPPLLCTL,
 144         TWL6040_REG_LPPLLCTL,
 145         TWL6040_REG_LPPLLDIV,
 146         TWL6040_REG_MICLCTL,
 147         TWL6040_REG_MICRCTL,
 148         TWL6040_REG_MICGAIN,
 149         TWL6040_REG_LINEGAIN,
 150         TWL6040_REG_HSLCTL,
 151         TWL6040_REG_HSRCTL,
 152         TWL6040_REG_HSGAIN,
 153         TWL6040_REG_EARCTL,
 154         TWL6040_REG_HFLCTL,
 155         TWL6040_REG_HFLGAIN,
 156         TWL6040_REG_HFRCTL,
 157         TWL6040_REG_HFRGAIN,
 158         TWL6040_REG_VIBCTLL,
 159         TWL6040_REG_VIBDATL,
 160         TWL6040_REG_VIBCTLR,
 161         TWL6040_REG_VIBDATR,
 162         TWL6040_REG_ALB,
 163         TWL6040_REG_DLB,
 164 };
 165
 166 /*
 167  * read twl6040 register cache
 168  */
 169 static inline unsigned int twl6040_read_reg_cache(struct snd_soc_codec *codec,
 170                                                 unsigned int reg)
 171 {
 172         u8 *cache = codec->reg_cache;
 173
 174         if (reg >= TWL6040_CACHEREGNUM)
 175                 return -EIO;
 176
 177         return cache[reg];
 178 }
 179
 180 /*
 181  * write twl6040 register cache
 182  */
 183 static inline void twl6040_write_reg_cache(struct snd_soc_codec *codec,
 184                                                 u8 reg, u8 value)
 185 {
 186         u8 *cache = codec->reg_cache;
 187
 188         if (reg >= TWL6040_CACHEREGNUM)
 189                 return;
 190         cache[reg] = value;
 191 }
 192
 193 /*
 194  * read from twl6040 hardware register
 195  */
 196 static int twl6040_read_reg_volatile(struct snd_soc_codec *codec,
 197                         unsigned int reg)
 198 {
 199         u8 value;
 200
 201         if (reg >= TWL6040_CACHEREGNUM)
 202                 return -EIO;
 203
 204         twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &value, reg);
 205         twl6040_write_reg_cache(codec, reg, value);
 206
 207         return value;
 208 }
 209
 210 /*
 211  * write to the twl6040 register space
 212  */
 213 static int twl6040_write(struct snd_soc_codec *codec,
 214                         unsigned int reg, unsigned int value)
 215 {
 216         if (reg >= TWL6040_CACHEREGNUM)
 217                 return -EIO;
 218
 219         twl6040_write_reg_cache(codec, reg, value);
 220         return twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, value, reg);
 221 }
 222
 223 static void twl6040_init_vio_regs(struct snd_soc_codec *codec)
 224 {
 225         u8 *cache = codec->reg_cache;
 226         int reg, i;
 227
 228         /* allow registers to be accessed by i2c */
 229         twl6040_write(codec, TWL6040_REG_ACCCTL, cache[TWL6040_REG_ACCCTL]);
 230
 231         for (i = 0; i < TWL6040_VIOREGNUM; i++) {
 232                 reg = twl6040_vio_reg[i];
 233                 /* skip read-only registers (ASICID, ASICREV, STATUS) */
 234                 switch (reg) {
 235                 case TWL6040_REG_ASICID:
 236                 case TWL6040_REG_ASICREV:
 237                 case TWL6040_REG_STATUS:
 238                         continue;
 239                 default:
 240                         break;
 241                 }
 242                 twl6040_write(codec, reg, cache[reg]);
 243         }
 244 }
 245
 246 static void twl6040_init_vdd_regs(struct snd_soc_codec *codec)
 247 {
 248         u8 *cache = codec->reg_cache;
 249         int reg, i;
 250
 251         for (i = 0; i < TWL6040_VDDREGNUM; i++) {
 252                 reg = twl6040_vdd_reg[i];
 253                 twl6040_write(codec, reg, cache[reg]);
 254         }
 255 }
 256
 257 /* twl6040 codec manual power-up sequence */
 258 static void twl6040_power_up(struct snd_soc_codec *codec)
 259 {
 260         u8 ncpctl, ldoctl, lppllctl, accctl;
 261
 262         ncpctl = twl6040_read_reg_cache(codec, TWL6040_REG_NCPCTL);
 263         ldoctl = twl6040_read_reg_cache(codec, TWL6040_REG_LDOCTL);
 264         lppllctl = twl6040_read_reg_cache(codec, TWL6040_REG_LPPLLCTL);
 265         accctl = twl6040_read_reg_cache(codec, TWL6040_REG_ACCCTL);
 266
 267         /* enable reference system */
 268         ldoctl |= TWL6040_REFENA;
 269         twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
 270         msleep(10);
 271         /* enable internal oscillator */
 272         ldoctl |= TWL6040_OSCENA;
 273         twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
 274         udelay(10);
 275         /* enable high-side ldo */
 276         ldoctl |= TWL6040_HSLDOENA;
 277         twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
 278         udelay(244);
 279         /* enable negative charge pump */
 280         ncpctl |= TWL6040_NCPENA | TWL6040_NCPOPEN;
 281         twl6040_write(codec, TWL6040_REG_NCPCTL, ncpctl);
 282         udelay(488);
 283         /* enable low-side ldo */
 284         ldoctl |= TWL6040_LSLDOENA;
 285         twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
 286         udelay(244);
 287         /* enable low-power pll */
 288         lppllctl |= TWL6040_LPLLENA;
 289         twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
 290         /* reset state machine */
 291         accctl |= TWL6040_RESETSPLIT;
 292         twl6040_write(codec, TWL6040_REG_ACCCTL, accctl);
 293         mdelay(5);
 294         accctl &= ~TWL6040_RESETSPLIT;
 295         twl6040_write(codec, TWL6040_REG_ACCCTL, accctl);
 296         /* disable internal oscillator */
 297         ldoctl &= ~TWL6040_OSCENA;
 298         twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
 299 }
 300
 301 /* twl6040 codec manual power-down sequence */
 302 static void twl6040_power_down(struct snd_soc_codec *codec)
 303 {
 304         u8 ncpctl, ldoctl, lppllctl, accctl;
 305
 306         ncpctl = twl6040_read_reg_cache(codec, TWL6040_REG_NCPCTL);
 307         ldoctl = twl6040_read_reg_cache(codec, TWL6040_REG_LDOCTL);
 308         lppllctl = twl6040_read_reg_cache(codec, TWL6040_REG_LPPLLCTL);
 309         accctl = twl6040_read_reg_cache(codec, TWL6040_REG_ACCCTL);
 310
 311         /* enable internal oscillator */
 312         ldoctl |= TWL6040_OSCENA;
 313         twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
 314         udelay(10);
 315         /* disable low-power pll */
 316         lppllctl &= ~TWL6040_LPLLENA;
 317         twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
 318         /* disable low-side ldo */
 319         ldoctl &= ~TWL6040_LSLDOENA;
 320         twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
 321         udelay(244);
 322         /* disable negative charge pump */
 323         ncpctl &= ~(TWL6040_NCPENA | TWL6040_NCPOPEN);
 324         twl6040_write(codec, TWL6040_REG_NCPCTL, ncpctl);
 325         udelay(488);
 326         /* disable high-side ldo */
 327         ldoctl &= ~TWL6040_HSLDOENA;
 328         twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
 329         udelay(244);
 330         /* disable internal oscillator */
 331         ldoctl &= ~TWL6040_OSCENA;
 332         twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
 333         /* disable reference system */
 334         ldoctl &= ~TWL6040_REFENA;
 335         twl6040_write(codec, TWL6040_REG_LDOCTL, ldoctl);
 336         msleep(10);
 337 }
 338
 339 /* set headset dac and driver power mode */
 340 static int headset_power_mode(struct snd_soc_codec *codec, int high_perf)
 341 {
 342         int hslctl, hsrctl;
 343         int mask = TWL6040_HSDRVMODEL | TWL6040_HSDACMODEL;
 344
 345         hslctl = twl6040_read_reg_cache(codec, TWL6040_REG_HSLCTL);
 346         hsrctl = twl6040_read_reg_cache(codec, TWL6040_REG_HSRCTL);
 347
 348         if (high_perf) {
 349                 hslctl &= ~mask;
 350                 hsrctl &= ~mask;
 351         } else {
 352                 hslctl |= mask;
 353                 hsrctl |= mask;
 354         }
 355
 356         twl6040_write(codec, TWL6040_REG_HSLCTL, hslctl);
 357         twl6040_write(codec, TWL6040_REG_HSRCTL, hsrctl);
 358
 359         return 0;
 360 }
 361
 362 static int twl6040_hs_dac_event(struct snd_soc_dapm_widget *w,
 363                         struct snd_kcontrol *kcontrol, int event)
 364 {
 365         msleep(1);
 366         return 0;
 367 }
 368
 369 static int twl6040_power_mode_event(struct snd_soc_dapm_widget *w,
 370                         struct snd_kcontrol *kcontrol, int event)
 371 {
 372         struct snd_soc_codec *codec = w->codec;
 373         struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
 374
 375         if (SND_SOC_DAPM_EVENT_ON(event))
 376                 priv->non_lp++;
 377         else
 378                 priv->non_lp--;
 379
 380         msleep(1);
 381
 382         return 0;
 383 }
 384
 385 /* audio interrupt handler */
 386 static irqreturn_t twl6040_naudint_handler(int irq, void *data)
 387 {
 388         struct snd_soc_codec *codec = data;
 389         struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
 390         u8 intid;
 391
 392         twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &intid, TWL6040_REG_INTID);
 393
 394         switch (intid) {
 395         case TWL6040_THINT:
 396                 dev_alert(codec->dev, "die temp over-limit detection\n");
 397                 break;
 398         case TWL6040_PLUGINT:
 399         case TWL6040_UNPLUGINT:
 400         case TWL6040_HOOKINT:
 401                 break;
 402         case TWL6040_HFINT:
 403                 dev_alert(codec->dev, "hf drivers over current detection\n");
 404                 break;
 405         case TWL6040_VIBINT:
 406                 dev_alert(codec->dev, "vib drivers over current detection\n");
 407                 break;
 408         case TWL6040_READYINT:
 409                 complete(&priv->ready);
 410                 break;
 411         default:
 412                 dev_err(codec->dev, "unknown audio interrupt %d\n", intid);
 413                 break;
 414         }
 415
 416         return IRQ_HANDLED;
 417 }
 418
 419 /*
 420  * MICATT volume control:
 421  * from -6 to 0 dB in 6 dB steps
 422  */
 423 static DECLARE_TLV_DB_SCALE(mic_preamp_tlv, -600, 600, 0);
 424
 425 /*
 426  * MICGAIN volume control:
 427  * from 6 to 30 dB in 6 dB steps
 428  */
 429 static DECLARE_TLV_DB_SCALE(mic_amp_tlv, 600, 600, 0);
 430
 431 /*
 432  * HSGAIN volume control:
 433  * from -30 to 0 dB in 2 dB steps
 434  */
 435 static DECLARE_TLV_DB_SCALE(hs_tlv, -3000, 200, 0);
 436
 437 /*
 438  * HFGAIN volume control:
 439  * from -52 to 6 dB in 2 dB steps
 440  */
 441 static DECLARE_TLV_DB_SCALE(hf_tlv, -5200, 200, 0);
 442
 443 /*
 444  * EPGAIN volume control:
 445  * from -24 to 6 dB in 2 dB steps
 446  */
 447 static DECLARE_TLV_DB_SCALE(ep_tlv, -2400, 200, 0);
 448
 449 /* Left analog microphone selection */
 450 static const char *twl6040_amicl_texts[] =
 451         {"Headset Mic", "Main Mic", "Aux/FM Left", "Off"};
 452
 453 /* Right analog microphone selection */
 454 static const char *twl6040_amicr_texts[] =
 455         {"Headset Mic", "Sub Mic", "Aux/FM Right", "Off"};
 456
 457 static const struct soc_enum twl6040_enum[] = {
 458         SOC_ENUM_SINGLE(TWL6040_REG_MICLCTL, 3, 3, twl6040_amicl_texts),
 459         SOC_ENUM_SINGLE(TWL6040_REG_MICRCTL, 3, 3, twl6040_amicr_texts),
 460 };
 461
 462 static const struct snd_kcontrol_new amicl_control =
 463         SOC_DAPM_ENUM("Route", twl6040_enum[0]);
 464
 465 static const struct snd_kcontrol_new amicr_control =
 466         SOC_DAPM_ENUM("Route", twl6040_enum[1]);
 467
 468 /* Headset DAC playback switches */
 469 static const struct snd_kcontrol_new hsdacl_switch_controls =
 470         SOC_DAPM_SINGLE("Switch", TWL6040_REG_HSLCTL, 5, 1, 0);
 471
 472 static const struct snd_kcontrol_new hsdacr_switch_controls =
 473         SOC_DAPM_SINGLE("Switch", TWL6040_REG_HSRCTL, 5, 1, 0);
 474
 475 /* Handsfree DAC playback switches */
 476 static const struct snd_kcontrol_new hfdacl_switch_controls =
 477         SOC_DAPM_SINGLE("Switch", TWL6040_REG_HFLCTL, 2, 1, 0);
 478
 479 static const struct snd_kcontrol_new hfdacr_switch_controls =
 480         SOC_DAPM_SINGLE("Switch", TWL6040_REG_HFRCTL, 2, 1, 0);
 481
 482 static const struct snd_kcontrol_new ep_driver_switch_controls =
 483         SOC_DAPM_SINGLE("Switch", TWL6040_REG_EARCTL, 0, 1, 0);
 484
 485 static const struct snd_kcontrol_new twl6040_snd_controls[] = {
 486         /* Capture gains */
 487         SOC_DOUBLE_TLV("Capture Preamplifier Volume",
 488                 TWL6040_REG_MICGAIN, 6, 7, 1, 1, mic_preamp_tlv),
 489         SOC_DOUBLE_TLV("Capture Volume",
 490                 TWL6040_REG_MICGAIN, 0, 3, 4, 0, mic_amp_tlv),
 491
 492         /* Playback gains */
 493         SOC_DOUBLE_TLV("Headset Playback Volume",
 494                 TWL6040_REG_HSGAIN, 0, 4, 0xF, 1, hs_tlv),
 495         SOC_DOUBLE_R_TLV("Handsfree Playback Volume",
 496                 TWL6040_REG_HFLGAIN, TWL6040_REG_HFRGAIN, 0, 0x1D, 1, hf_tlv),
 497         SOC_SINGLE_TLV("Earphone Playback Volume",
 498                 TWL6040_REG_EARCTL, 1, 0xF, 1, ep_tlv),
 499 };
 500
 501 static const struct snd_soc_dapm_widget twl6040_dapm_widgets[] = {
 502         /* Inputs */
 503         SND_SOC_DAPM_INPUT("MAINMIC"),
 504         SND_SOC_DAPM_INPUT("HSMIC"),
 505         SND_SOC_DAPM_INPUT("SUBMIC"),
 506         SND_SOC_DAPM_INPUT("AFML"),
 507         SND_SOC_DAPM_INPUT("AFMR"),
 508
 509         /* Outputs */
 510         SND_SOC_DAPM_OUTPUT("HSOL"),
 511         SND_SOC_DAPM_OUTPUT("HSOR"),
 512         SND_SOC_DAPM_OUTPUT("HFL"),
 513         SND_SOC_DAPM_OUTPUT("HFR"),
 514         SND_SOC_DAPM_OUTPUT("EP"),
 515
 516         /* Analog input muxes for the capture amplifiers */
 517         SND_SOC_DAPM_MUX("Analog Left Capture Route",
 518                         SND_SOC_NOPM, 0, 0, &amicl_control),
 519         SND_SOC_DAPM_MUX("Analog Right Capture Route",
 520                         SND_SOC_NOPM, 0, 0, &amicr_control),
 521
 522         /* Analog capture PGAs */
 523         SND_SOC_DAPM_PGA("MicAmpL",
 524                         TWL6040_REG_MICLCTL, 0, 0, NULL, 0),
 525         SND_SOC_DAPM_PGA("MicAmpR",
 526                         TWL6040_REG_MICRCTL, 0, 0, NULL, 0),
 527
 528         /* ADCs */
 529         SND_SOC_DAPM_ADC("ADC Left", "Left Front Capture",
 530                         TWL6040_REG_MICLCTL, 2, 0),
 531         SND_SOC_DAPM_ADC("ADC Right", "Right Front Capture",
 532                         TWL6040_REG_MICRCTL, 2, 0),
 533
 534         /* Microphone bias */
 535         SND_SOC_DAPM_MICBIAS("Headset Mic Bias",
 536                         TWL6040_REG_AMICBCTL, 0, 0),
 537         SND_SOC_DAPM_MICBIAS("Main Mic Bias",
 538                         TWL6040_REG_AMICBCTL, 4, 0),
 539         SND_SOC_DAPM_MICBIAS("Digital Mic1 Bias",
 540                         TWL6040_REG_DMICBCTL, 0, 0),
 541         SND_SOC_DAPM_MICBIAS("Digital Mic2 Bias",
 542                         TWL6040_REG_DMICBCTL, 4, 0),
 543
 544         /* DACs */
 545         SND_SOC_DAPM_DAC_E("HSDAC Left", "Headset Playback",
 546                         TWL6040_REG_HSLCTL, 0, 0,
 547                         twl6040_hs_dac_event,
 548                         SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
 549         SND_SOC_DAPM_DAC_E("HSDAC Right", "Headset Playback",
 550                         TWL6040_REG_HSRCTL, 0, 0,
 551                         twl6040_hs_dac_event,
 552                         SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
 553         SND_SOC_DAPM_DAC_E("HFDAC Left", "Handsfree Playback",
 554                         TWL6040_REG_HFLCTL, 0, 0,
 555                         twl6040_power_mode_event,
 556                         SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
 557         SND_SOC_DAPM_DAC_E("HFDAC Right", "Handsfree Playback",
 558                         TWL6040_REG_HFRCTL, 0, 0,
 559                         twl6040_power_mode_event,
 560                         SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
 561
 562         /* Analog playback switches */
 563         SND_SOC_DAPM_SWITCH("HSDAC Left Playback",
 564                         SND_SOC_NOPM, 0, 0, &hsdacl_switch_controls),
 565         SND_SOC_DAPM_SWITCH("HSDAC Right Playback",
 566                         SND_SOC_NOPM, 0, 0, &hsdacr_switch_controls),
 567         SND_SOC_DAPM_SWITCH("HFDAC Left Playback",
 568                         SND_SOC_NOPM, 0, 0, &hfdacl_switch_controls),
 569         SND_SOC_DAPM_SWITCH("HFDAC Right Playback",
 570                         SND_SOC_NOPM, 0, 0, &hfdacr_switch_controls),
 571
 572         /* Analog playback drivers */
 573         SND_SOC_DAPM_PGA_E("Handsfree Left Driver",
 574                         TWL6040_REG_HFLCTL, 4, 0, NULL, 0,
 575                         twl6040_power_mode_event,
 576                         SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
 577         SND_SOC_DAPM_PGA_E("Handsfree Right Driver",
 578                         TWL6040_REG_HFRCTL, 4, 0, NULL, 0,
 579                         twl6040_power_mode_event,
 580                         SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
 581         SND_SOC_DAPM_PGA("Headset Left Driver",
 582                         TWL6040_REG_HSLCTL, 2, 0, NULL, 0),
 583         SND_SOC_DAPM_PGA("Headset Right Driver",
 584                         TWL6040_REG_HSRCTL, 2, 0, NULL, 0),
 585         SND_SOC_DAPM_SWITCH_E("Earphone Driver",
 586                         SND_SOC_NOPM, 0, 0, &ep_driver_switch_controls,
 587                         twl6040_power_mode_event,
 588                         SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
 589
 590         /* Analog playback PGAs */
 591         SND_SOC_DAPM_PGA("HFDAC Left PGA",
 592                         TWL6040_REG_HFLCTL, 1, 0, NULL, 0),
 593         SND_SOC_DAPM_PGA("HFDAC Right PGA",
 594                         TWL6040_REG_HFRCTL, 1, 0, NULL, 0),
 595
 596 };
 597
 598 static const struct snd_soc_dapm_route intercon[] = {
 599         /* Capture path */
 600         {"Analog Left Capture Route", "Headset Mic", "HSMIC"},
 601         {"Analog Left Capture Route", "Main Mic", "MAINMIC"},
 602         {"Analog Left Capture Route", "Aux/FM Left", "AFML"},
 603
 604         {"Analog Right Capture Route", "Headset Mic", "HSMIC"},
 605         {"Analog Right Capture Route", "Sub Mic", "SUBMIC"},
 606         {"Analog Right Capture Route", "Aux/FM Right", "AFMR"},
 607
 608         {"MicAmpL", NULL, "Analog Left Capture Route"},
 609         {"MicAmpR", NULL, "Analog Right Capture Route"},
 610
 611         {"ADC Left", NULL, "MicAmpL"},
 612         {"ADC Right", NULL, "MicAmpR"},
 613
 614         /* Headset playback path */
 615         {"HSDAC Left Playback", "Switch", "HSDAC Left"},
 616         {"HSDAC Right Playback", "Switch", "HSDAC Right"},
 617
 618         {"Headset Left Driver", NULL, "HSDAC Left Playback"},
 619         {"Headset Right Driver", NULL, "HSDAC Right Playback"},
 620
 621         {"HSOL", NULL, "Headset Left Driver"},
 622         {"HSOR", NULL, "Headset Right Driver"},
 623
 624         /* Earphone playback path */
 625         {"Earphone Driver", "Switch", "HSDAC Left"},
 626         {"EP", NULL, "Earphone Driver"},
 627
 628         /* Handsfree playback path */
 629         {"HFDAC Left Playback", "Switch", "HFDAC Left"},
 630         {"HFDAC Right Playback", "Switch", "HFDAC Right"},
 631
 632         {"HFDAC Left PGA", NULL, "HFDAC Left Playback"},
 633         {"HFDAC Right PGA", NULL, "HFDAC Right Playback"},
 634
 635         {"Handsfree Left Driver", "Switch", "HFDAC Left PGA"},
 636         {"Handsfree Right Driver", "Switch", "HFDAC Right PGA"},
 637
 638         {"HFL", NULL, "Handsfree Left Driver"},
 639         {"HFR", NULL, "Handsfree Right Driver"},
 640 };
 641
 642 static int twl6040_add_widgets(struct snd_soc_codec *codec)
 643 {
 644         snd_soc_dapm_new_controls(codec, twl6040_dapm_widgets,
 645                                  ARRAY_SIZE(twl6040_dapm_widgets));
 646
 647         snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
 648
 649         snd_soc_dapm_new_widgets(codec);
 650
 651         return 0;
 652 }
 653
 654 static int twl6040_power_up_completion(struct snd_soc_codec *codec,
 655                                         int naudint)
 656 {
 657         struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
 658         int time_left;
 659         u8 intid;
 660
 661         time_left = wait_for_completion_timeout(&priv->ready,
 662                                 msecs_to_jiffies(48));
 663
 664         if (!time_left) {
 665                 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &intid,
 666                                                         TWL6040_REG_INTID);
 667                 if (!(intid & TWL6040_READYINT)) {
 668                         dev_err(codec->dev, "timeout waiting for READYINT\n");
 669                         return -ETIMEDOUT;
 670                 }
 671         }
 672
 673         priv->codec_powered = 1;
 674
 675         return 0;
 676 }
 677
 678 static int twl6040_set_bias_level(struct snd_soc_codec *codec,
 679                                 enum snd_soc_bias_level level)
 680 {
 681         struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
 682         int audpwron = priv->audpwron;
 683         int naudint = priv->naudint;
 684         int ret;
 685
 686         switch (level) {
 687         case SND_SOC_BIAS_ON:
 688                 break;
 689         case SND_SOC_BIAS_PREPARE:
 690                 break;
 691         case SND_SOC_BIAS_STANDBY:
 692                 if (priv->codec_powered)
 693                         break;
 694
 695                 if (gpio_is_valid(audpwron)) {
 696                         /* use AUDPWRON line */
 697                         gpio_set_value(audpwron, 1);
 698
 699                         /* wait for power-up completion */
 700                         ret = twl6040_power_up_completion(codec, naudint);
 701                         if (ret)
 702                                 return ret;
 703
 704                         /* sync registers updated during power-up sequence */
 705                         twl6040_read_reg_volatile(codec, TWL6040_REG_NCPCTL);
 706                         twl6040_read_reg_volatile(codec, TWL6040_REG_LDOCTL);
 707                         twl6040_read_reg_volatile(codec, TWL6040_REG_LPPLLCTL);
 708                 } else {
 709                         /* use manual power-up sequence */
 710                         twl6040_power_up(codec);
 711                         priv->codec_powered = 1;
 712                 }
 713
 714                 /* initialize vdd/vss registers with reg_cache */
 715                 twl6040_init_vdd_regs(codec);
 716                 break;
 717         case SND_SOC_BIAS_OFF:
 718                 if (!priv->codec_powered)
 719                         break;
 720
 721                 if (gpio_is_valid(audpwron)) {
 722                         /* use AUDPWRON line */
 723                         gpio_set_value(audpwron, 0);
 724
 725                         /* power-down sequence latency */
 726                         udelay(500);
 727
 728                         /* sync registers updated during power-down sequence */
 729                         twl6040_read_reg_volatile(codec, TWL6040_REG_NCPCTL);
 730                         twl6040_read_reg_volatile(codec, TWL6040_REG_LDOCTL);
 731                         twl6040_write_reg_cache(codec, TWL6040_REG_LPPLLCTL,
 732                                                 0x00);
 733                 } else {
 734                         /* use manual power-down sequence */
 735                         twl6040_power_down(codec);
 736                 }
 737
 738                 priv->codec_powered = 0;
 739                 break;
 740         }
 741
 742         codec->bias_level = level;
 743
 744         return 0;
 745 }
 746
 747 /* set of rates for each pll: low-power and high-performance */
 748
 749 static unsigned int lp_rates[] = {
 750         88200,
 751         96000,
 752 };
 753
 754 static struct snd_pcm_hw_constraint_list lp_constraints = {
 755         .count  = ARRAY_SIZE(lp_rates),
 756         .list   = lp_rates,
 757 };
 758
 759 static unsigned int hp_rates[] = {
 760         96000,
 761 };
 762
 763 static struct snd_pcm_hw_constraint_list hp_constraints = {
 764         .count  = ARRAY_SIZE(hp_rates),
 765         .list   = hp_rates,
 766 };
 767
 768 static int twl6040_startup(struct snd_pcm_substream *substream,
 769                         struct snd_soc_dai *dai)
 770 {
 771         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 772         struct snd_soc_codec *codec = rtd->codec;
 773         struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
 774
 775         if (!priv->sysclk) {
 776                 dev_err(codec->dev,
 777                         "no mclk configured, call set_sysclk() on init\n");
 778                 return -EINVAL;
 779         }
 780
 781         /*
 782          * capture is not supported at 17.64 MHz,
 783          * it's reserved for headset low-power playback scenario
 784          */
 785         if ((priv->sysclk == 17640000) && substream->stream) {
 786                 dev_err(codec->dev,
 787                         "capture mode is not supported at %dHz\n",
 788                         priv->sysclk);
 789                 return -EINVAL;
 790         }
 791
 792         snd_pcm_hw_constraint_list(substream->runtime, 0,
 793                                 SNDRV_PCM_HW_PARAM_RATE,
 794                                 priv->sysclk_constraints);
 795
 796         return 0;
 797 }
 798
 799 static int twl6040_hw_params(struct snd_pcm_substream *substream,
 800                         struct snd_pcm_hw_params *params,
 801                         struct snd_soc_dai *dai)
 802 {
 803         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 804         struct snd_soc_codec *codec = rtd->codec;
 805         struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
 806         u8 lppllctl;
 807         int rate;
 808
 809         /* nothing to do for high-perf pll, it supports only 48 kHz */
 810         if (priv->pll == TWL6040_HPPLL_ID)
 811                 return 0;
 812
 813         lppllctl = twl6040_read_reg_cache(codec, TWL6040_REG_LPPLLCTL);
 814
 815         rate = params_rate(params);
 816         switch (rate) {
 817         case 88200:
 818                 lppllctl |= TWL6040_LPLLFIN;
 819                 priv->sysclk = 17640000;
 820                 break;
 821         case 96000:
 822                 lppllctl &= ~TWL6040_LPLLFIN;
 823                 priv->sysclk = 19200000;
 824                 break;
 825         default:
 826                 dev_err(codec->dev, "unsupported rate %d\n", rate);
 827                 return -EINVAL;
 828         }
 829
 830         twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
 831
 832         return 0;
 833 }
 834
 835 static int twl6040_trigger(struct snd_pcm_substream *substream,
 836                         int cmd, struct snd_soc_dai *dai)
 837 {
 838         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 839         struct snd_soc_codec *codec = rtd->codec;
 840         struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
 841
 842         switch (cmd) {
 843         case SNDRV_PCM_TRIGGER_START:
 844         case SNDRV_PCM_TRIGGER_RESUME:
 845                 /*
 846                  * low-power playback mode is restricted
 847                  * for headset path only
 848                  */
 849                 if ((priv->sysclk == 17640000) && priv->non_lp) {
 850                         dev_err(codec->dev,
 851                                 "some enabled paths aren't supported at %dHz\n",
 852                                 priv->sysclk);
 853                         return -EPERM;
 854                 }
 855                 break;
 856         default:
 857                 break;
 858         }
 859
 860         return 0;
 861 }
 862
 863 static int twl6040_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 864                 int clk_id, unsigned int freq, int dir)
 865 {
 866         struct snd_soc_codec *codec = codec_dai->codec;
 867         struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
 868         u8 hppllctl, lppllctl;
 869
 870         hppllctl = twl6040_read_reg_cache(codec, TWL6040_REG_HPPLLCTL);
 871         lppllctl = twl6040_read_reg_cache(codec, TWL6040_REG_LPPLLCTL);
 872
 873         switch (clk_id) {
 874         case TWL6040_SYSCLK_SEL_LPPLL:
 875                 switch (freq) {
 876                 case 32768:
 877                         /* headset dac and driver must be in low-power mode */
 878                         headset_power_mode(codec, 0);
 879
 880                         /* clk32k input requires low-power pll */
 881                         lppllctl |= TWL6040_LPLLENA;
 882                         twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
 883                         mdelay(5);
 884                         lppllctl &= ~TWL6040_HPLLSEL;
 885                         twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
 886                         hppllctl &= ~TWL6040_HPLLENA;
 887                         twl6040_write(codec, TWL6040_REG_HPPLLCTL, hppllctl);
 888                         break;
 889                 default:
 890                         dev_err(codec->dev, "unknown mclk freq %d\n", freq);
 891                         return -EINVAL;
 892                 }
 893
 894                 /* lppll divider */
 895                 switch (priv->sysclk) {
 896                 case 17640000:
 897                         lppllctl |= TWL6040_LPLLFIN;
 898                         break;
 899                 case 19200000:
 900                         lppllctl &= ~TWL6040_LPLLFIN;
 901                         break;
 902                 default:
 903                         /* sysclk not yet configured */
 904                         lppllctl &= ~TWL6040_LPLLFIN;
 905                         priv->sysclk = 19200000;
 906                         break;
 907                 }
 908
 909                 twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
 910
 911                 priv->pll = TWL6040_LPPLL_ID;
 912                 priv->sysclk_constraints = &lp_constraints;
 913                 break;
 914         case TWL6040_SYSCLK_SEL_HPPLL:
 915                 hppllctl &= ~TWL6040_MCLK_MSK;
 916
 917                 switch (freq) {
 918                 case 12000000:
 919                         /* mclk input, pll enabled */
 920                         hppllctl |= TWL6040_MCLK_12000KHZ |
 921                                     TWL6040_HPLLSQRBP |
 922                                     TWL6040_HPLLENA;
 923                         break;
 924                 case 19200000:
 925                         /* mclk input, pll disabled */
 926                         hppllctl |= TWL6040_MCLK_19200KHZ |
 927                                     TWL6040_HPLLSQRENA |
 928                                     TWL6040_HPLLBP;
 929                         break;
 930                 case 26000000:
 931                         /* mclk input, pll enabled */
 932                         hppllctl |= TWL6040_MCLK_26000KHZ |
 933                                     TWL6040_HPLLSQRBP |
 934                                     TWL6040_HPLLENA;
 935                         break;
 936                 case 38400000:
 937                         /* clk slicer, pll disabled */
 938                         hppllctl |= TWL6040_MCLK_38400KHZ |
 939                                     TWL6040_HPLLSQRENA |
 940                                     TWL6040_HPLLBP;
 941                         break;
 942                 default:
 943                         dev_err(codec->dev, "unknown mclk freq %d\n", freq);
 944                         return -EINVAL;
 945                 }
 946
 947                 /* headset dac and driver must be in high-performance mode */
 948                 headset_power_mode(codec, 1);
 949
 950                 twl6040_write(codec, TWL6040_REG_HPPLLCTL, hppllctl);
 951                 udelay(500);
 952                 lppllctl |= TWL6040_HPLLSEL;
 953                 twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
 954                 lppllctl &= ~TWL6040_LPLLENA;
 955                 twl6040_write(codec, TWL6040_REG_LPPLLCTL, lppllctl);
 956
 957                 /* high-performance pll can provide only 19.2 MHz */
 958                 priv->pll = TWL6040_HPPLL_ID;
 959                 priv->sysclk = 19200000;
 960                 priv->sysclk_constraints = &hp_constraints;
 961                 break;
 962         default:
 963                 dev_err(codec->dev, "unknown clk_id %d\n", clk_id);
 964                 return -EINVAL;
 965         }
 966
 967         return 0;
 968 }
 969
 970 static struct snd_soc_dai_ops twl6040_dai_ops = {
 971         .startup        = twl6040_startup,
 972         .hw_params      = twl6040_hw_params,
 973         .trigger        = twl6040_trigger,
 974         .set_sysclk     = twl6040_set_dai_sysclk,
 975 };
 976
 977 static struct snd_soc_dai_driver twl6040_dai = {
 978         .name = "twl6040-hifi",
 979         .playback = {
 980                 .stream_name = "Playback",
 981                 .channels_min = 1,
 982                 .channels_max = 4,
 983                 .rates = TWL6040_RATES,
 984                 .formats = TWL6040_FORMATS,
 985         },
 986         .capture = {
 987                 .stream_name = "Capture",
 988                 .channels_min = 1,
 989                 .channels_max = 2,
 990                 .rates = TWL6040_RATES,
 991                 .formats = TWL6040_FORMATS,
 992         },
 993         .ops = &twl6040_dai_ops,
 994 };
 995
 996 #ifdef CONFIG_PM
 997 static int twl6040_suspend(struct snd_soc_codec *codec, pm_message_t state)
 998 {
 999         twl6040_set_bias_level(codec, SND_SOC_BIAS_OFF);
1000
1001         return 0;
1002 }
1003
1004 static int twl6040_resume(struct snd_soc_codec *codec)
1005 {
1006         twl6040_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1007
1008         return 0;
1009 }
1010 #else
1011 #define twl6040_suspend NULL
1012 #define twl6040_resume NULL
1013 #endif
1014
1015 static int twl6040_probe(struct snd_soc_codec *codec)
1016 {
1017         struct twl4030_codec_data *twl_codec = codec->dev->platform_data;
1018         struct twl6040_data *priv;
1019         int audpwron, naudint;
1020         int ret = 0;
1021
1022         priv = kzalloc(sizeof(struct twl6040_data), GFP_KERNEL);
1023         if (priv == NULL)
1024                 return -ENOMEM;
1025         snd_soc_codec_set_drvdata(codec, priv);
1026
1027         if (twl_codec) {
1028                 audpwron = twl_codec->audpwron_gpio;
1029                 naudint = twl_codec->naudint_irq;
1030         } else {
1031                 audpwron = -EINVAL;
1032                 naudint = 0;
1033         }
1034
1035         priv->audpwron = audpwron;
1036         priv->naudint = naudint;
1037
1038         init_completion(&priv->ready);
1039
1040         if (gpio_is_valid(audpwron)) {
1041                 ret = gpio_request(audpwron, "audpwron");
1042                 if (ret)
1043                         goto gpio1_err;
1044
1045                 ret = gpio_direction_output(audpwron, 0);
1046                 if (ret)
1047                         goto gpio2_err;
1048
1049                 priv->codec_powered = 0;
1050         }
1051
1052         if (naudint) {
1053                 /* audio interrupt */
1054                 ret = request_threaded_irq(naudint, NULL,
1055                                 twl6040_naudint_handler,
1056                                 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
1057                                 "twl6040_codec", codec);
1058                 if (ret)
1059                         goto gpio2_err;
1060         } else {
1061                 if (gpio_is_valid(audpwron)) {
1062                         /* enable only codec ready interrupt */
1063                         twl6040_write_reg_cache(codec, TWL6040_REG_INTMR,
1064                                         ~TWL6040_READYMSK & TWL6040_ALLINT_MSK);
1065                 } else {
1066                         /* no interrupts at all */
1067                         twl6040_write_reg_cache(codec, TWL6040_REG_INTMR,
1068                                                 TWL6040_ALLINT_MSK);
1069                 }
1070         }
1071
1072         /* init vio registers */
1073         twl6040_init_vio_regs(codec);
1074
1075         /* power on device */
1076         ret = twl6040_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1077         if (ret)
1078                 goto irq_err;
1079
1080         snd_soc_add_controls(codec, twl6040_snd_controls,
1081                                 ARRAY_SIZE(twl6040_snd_controls));
1082         twl6040_add_widgets(codec);
1083
1084         return 0;
1085
1086 irq_err:
1087         if (naudint)
1088                 free_irq(naudint, codec);
1089 gpio2_err:
1090         if (gpio_is_valid(audpwron))
1091                 gpio_free(audpwron);
1092 gpio1_err:
1093         kfree(priv);
1094         return ret;
1095 }
1096
1097 static int twl6040_remove(struct snd_soc_codec *codec)
1098 {
1099         struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
1100         int audpwron = priv->audpwron;
1101         int naudint = priv->naudint;
1102
1103         twl6040_set_bias_level(codec, SND_SOC_BIAS_OFF);
1104
1105         if (gpio_is_valid(audpwron))
1106                 gpio_free(audpwron);
1107
1108         if (naudint)
1109                 free_irq(naudint, codec);
1110
1111         kfree(priv);
1112
1113         return 0;
1114 }
1115
1116 static struct snd_soc_codec_driver soc_codec_dev_twl6040 = {
1117         .probe = twl6040_probe,
1118         .remove = twl6040_remove,
1119         .suspend = twl6040_suspend,
1120         .resume = twl6040_resume,
1121         .read = twl6040_read_reg_cache,
1122         .write = twl6040_write,
1123         .set_bias_level = twl6040_set_bias_level,
1124         .reg_cache_size = ARRAY_SIZE(twl6040_reg),
1125         .reg_word_size = sizeof(u8),
1126         .reg_cache_default = twl6040_reg,
1127 };
1128
1129 static int __devinit twl6040_codec_probe(struct platform_device *pdev)
1130 {
1131         return snd_soc_register_codec(&pdev->dev,
1132                         &soc_codec_dev_twl6040, &twl6040_dai, 1);
1133 }
1134
1135 static int __devexit twl6040_codec_remove(struct platform_device *pdev)
1136 {
1137         snd_soc_unregister_codec(&pdev->dev);
1138         return 0;
1139 }
1140
1141 static struct platform_driver twl6040_codec_driver = {
1142         .driver = {
1143                 .name = "twl6040-codec",
1144                 .owner = THIS_MODULE,
1145         },
1146         .probe = twl6040_codec_probe,
1147         .remove = __devexit_p(twl6040_codec_remove),
1148 };
1149
1150 static int __init twl6040_codec_init(void)
1151 {
1152         return platform_driver_register(&twl6040_codec_driver);
1153 }
1154 module_init(twl6040_codec_init);
1155
1156 static void __exit twl6040_codec_exit(void)
1157 {
1158         platform_driver_unregister(&twl6040_codec_driver);
1159 }
1160 module_exit(twl6040_codec_exit);
1161
1162 MODULE_DESCRIPTION("ASoC TWL6040 codec driver");
1163 MODULE_AUTHOR("Misael Lopez Cruz");
1164 MODULE_LICENSE("GPL");