sound/soc/codecs/tlv320aic23.c

   1 /*
   2  * ALSA SoC TLV320AIC23 codec driver
   3  *
   4  * Author:      Arun KS, <arunks@mistralsolutions.com>
   5  * Copyright:   (C) 2008 Mistral Solutions Pvt Ltd.,
   6  *
   7  * Based on sound/soc/codecs/wm8731.c by Richard Purdie
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Notes:
  14  *  The AIC23 is a driver for a low power stereo audio
  15  *  codec tlv320aic23
  16  *
  17  *  The machine layer should disable unsupported inputs/outputs by
  18  *  snd_soc_dapm_disable_pin(codec, "LHPOUT"), etc.
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/init.h>
  24 #include <linux/delay.h>
  25 #include <linux/pm.h>
  26 #include <linux/i2c.h>
  27 #include <linux/slab.h>
  28 #include <sound/core.h>
  29 #include <sound/pcm.h>
  30 #include <sound/pcm_params.h>
  31 #include <sound/soc.h>
  32 #include <sound/tlv.h>
  33 #include <sound/initval.h>
  34
  35 #include "tlv320aic23.h"
  36
  37 /*
  38  * AIC23 register cache
  39  */
  40 static const u16 tlv320aic23_reg[] = {
  41         0x0097, 0x0097, 0x00F9, 0x00F9, /* 0 */
  42         0x001A, 0x0004, 0x0007, 0x0001, /* 4 */
  43         0x0020, 0x0000, 0x0000, 0x0000, /* 8 */
  44         0x0000, 0x0000, 0x0000, 0x0000, /* 12 */
  45 };
  46
  47 static const char *rec_src_text[] = { "Line", "Mic" };
  48 static const char *deemph_text[] = {"None", "32Khz", "44.1Khz", "48Khz"};
  49
  50 static const struct soc_enum rec_src_enum =
  51         SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);
  52
  53 static const struct snd_kcontrol_new tlv320aic23_rec_src_mux_controls =
  54 SOC_DAPM_ENUM("Input Select", rec_src_enum);
  55
  56 static const struct soc_enum tlv320aic23_rec_src =
  57         SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);
  58 static const struct soc_enum tlv320aic23_deemph =
  59         SOC_ENUM_SINGLE(TLV320AIC23_DIGT, 1, 4, deemph_text);
  60
  61 static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -12100, 100, 0);
  62 static const DECLARE_TLV_DB_SCALE(input_gain_tlv, -1725, 75, 0);
  63 static const DECLARE_TLV_DB_SCALE(sidetone_vol_tlv, -1800, 300, 0);
  64
  65 static int snd_soc_tlv320aic23_put_volsw(struct snd_kcontrol *kcontrol,
  66         struct snd_ctl_elem_value *ucontrol)
  67 {
  68         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
  69         u16 val, reg;
  70
  71         val = (ucontrol->value.integer.value[0] & 0x07);
  72
  73         /* linear conversion to userspace
  74         * 000   =       -6db
  75         * 001   =       -9db
  76         * 010   =       -12db
  77         * 011   =       -18db (Min)
  78         * 100   =       0db (Max)
  79         */
  80         val = (val >= 4) ? 4  : (3 - val);
  81
  82         reg = snd_soc_read(codec, TLV320AIC23_ANLG) & (~0x1C0);
  83         snd_soc_write(codec, TLV320AIC23_ANLG, reg | (val << 6));
  84
  85         return 0;
  86 }
  87
  88 static int snd_soc_tlv320aic23_get_volsw(struct snd_kcontrol *kcontrol,
  89         struct snd_ctl_elem_value *ucontrol)
  90 {
  91         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
  92         u16 val;
  93
  94         val = snd_soc_read(codec, TLV320AIC23_ANLG) & (0x1C0);
  95         val = val >> 6;
  96         val = (val >= 4) ? 4  : (3 -  val);
  97         ucontrol->value.integer.value[0] = val;
  98         return 0;
  99
 100 }
 101
 102 static const struct snd_kcontrol_new tlv320aic23_snd_controls[] = {
 103         SOC_DOUBLE_R_TLV("Digital Playback Volume", TLV320AIC23_LCHNVOL,
 104                          TLV320AIC23_RCHNVOL, 0, 127, 0, out_gain_tlv),
 105         SOC_SINGLE("Digital Playback Switch", TLV320AIC23_DIGT, 3, 1, 1),
 106         SOC_DOUBLE_R("Line Input Switch", TLV320AIC23_LINVOL,
 107                      TLV320AIC23_RINVOL, 7, 1, 0),
 108         SOC_DOUBLE_R_TLV("Line Input Volume", TLV320AIC23_LINVOL,
 109                          TLV320AIC23_RINVOL, 0, 31, 0, input_gain_tlv),
 110         SOC_SINGLE("Mic Input Switch", TLV320AIC23_ANLG, 1, 1, 1),
 111         SOC_SINGLE("Mic Booster Switch", TLV320AIC23_ANLG, 0, 1, 0),
 112         SOC_SINGLE_EXT_TLV("Sidetone Volume", TLV320AIC23_ANLG, 6, 4, 0,
 113                            snd_soc_tlv320aic23_get_volsw,
 114                            snd_soc_tlv320aic23_put_volsw, sidetone_vol_tlv),
 115         SOC_ENUM("Playback De-emphasis", tlv320aic23_deemph),
 116 };
 117
 118 /* PGA Mixer controls for Line and Mic switch */
 119 static const struct snd_kcontrol_new tlv320aic23_output_mixer_controls[] = {
 120         SOC_DAPM_SINGLE("Line Bypass Switch", TLV320AIC23_ANLG, 3, 1, 0),
 121         SOC_DAPM_SINGLE("Mic Sidetone Switch", TLV320AIC23_ANLG, 5, 1, 0),
 122         SOC_DAPM_SINGLE("Playback Switch", TLV320AIC23_ANLG, 4, 1, 0),
 123 };
 124
 125 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
 126         SND_SOC_DAPM_DAC("DAC", "Playback", TLV320AIC23_PWR, 3, 1),
 127         SND_SOC_DAPM_ADC("ADC", "Capture", TLV320AIC23_PWR, 2, 1),
 128         SND_SOC_DAPM_MUX("Capture Source", SND_SOC_NOPM, 0, 0,
 129                          &tlv320aic23_rec_src_mux_controls),
 130         SND_SOC_DAPM_MIXER("Output Mixer", TLV320AIC23_PWR, 4, 1,
 131                            &tlv320aic23_output_mixer_controls[0],
 132                            ARRAY_SIZE(tlv320aic23_output_mixer_controls)),
 133         SND_SOC_DAPM_PGA("Line Input", TLV320AIC23_PWR, 0, 1, NULL, 0),
 134         SND_SOC_DAPM_PGA("Mic Input", TLV320AIC23_PWR, 1, 1, NULL, 0),
 135
 136         SND_SOC_DAPM_OUTPUT("LHPOUT"),
 137         SND_SOC_DAPM_OUTPUT("RHPOUT"),
 138         SND_SOC_DAPM_OUTPUT("LOUT"),
 139         SND_SOC_DAPM_OUTPUT("ROUT"),
 140
 141         SND_SOC_DAPM_INPUT("LLINEIN"),
 142         SND_SOC_DAPM_INPUT("RLINEIN"),
 143
 144         SND_SOC_DAPM_INPUT("MICIN"),
 145 };
 146
 147 static const struct snd_soc_dapm_route tlv320aic23_intercon[] = {
 148         /* Output Mixer */
 149         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 150         {"Output Mixer", "Playback Switch", "DAC"},
 151         {"Output Mixer", "Mic Sidetone Switch", "Mic Input"},
 152
 153         /* Outputs */
 154         {"RHPOUT", NULL, "Output Mixer"},
 155         {"LHPOUT", NULL, "Output Mixer"},
 156         {"LOUT", NULL, "Output Mixer"},
 157         {"ROUT", NULL, "Output Mixer"},
 158
 159         /* Inputs */
 160         {"Line Input", "NULL", "LLINEIN"},
 161         {"Line Input", "NULL", "RLINEIN"},
 162
 163         {"Mic Input", "NULL", "MICIN"},
 164
 165         /* input mux */
 166         {"Capture Source", "Line", "Line Input"},
 167         {"Capture Source", "Mic", "Mic Input"},
 168         {"ADC", NULL, "Capture Source"},
 169
 170 };
 171
 172 /* AIC23 driver data */
 173 struct aic23 {
 174         enum snd_soc_control_type control_type;
 175         int mclk;
 176         int requested_adc;
 177         int requested_dac;
 178 };
 179
 180 /*
 181  * Common Crystals used
 182  * 11.2896 Mhz /128 = *88.2k  /192 = 58.8k
 183  * 12.0000 Mhz /125 = *96k    /136 = 88.235K
 184  * 12.2880 Mhz /128 = *96k    /192 = 64k
 185  * 16.9344 Mhz /128 = 132.3k /192 = *88.2k
 186  * 18.4320 Mhz /128 = 144k   /192 = *96k
 187  */
 188
 189 /*
 190  * Normal BOSR 0-256/2 = 128, 1-384/2 = 192
 191  * USB BOSR 0-250/2 = 125, 1-272/2 = 136
 192  */
 193 static const int bosr_usb_divisor_table[] = {
 194         128, 125, 192, 136
 195 };
 196 #define LOWER_GROUP ((1<<0) | (1<<1) | (1<<2) | (1<<3) | (1<<6) | (1<<7))
 197 #define UPPER_GROUP ((1<<8) | (1<<9) | (1<<10) | (1<<11)        | (1<<15))
 198 static const unsigned short sr_valid_mask[] = {
 199         LOWER_GROUP|UPPER_GROUP,        /* Normal, bosr - 0*/
 200         LOWER_GROUP,                    /* Usb, bosr - 0*/
 201         LOWER_GROUP|UPPER_GROUP,        /* Normal, bosr - 1*/
 202         UPPER_GROUP,                    /* Usb, bosr - 1*/
 203 };
 204 /*
 205  * Every divisor is a factor of 11*12
 206  */
 207 #define SR_MULT (11*12)
 208 #define A(x) (SR_MULT/x)
 209 static const unsigned char sr_adc_mult_table[] = {
 210         A(2), A(2), A(12), A(12),  0, 0, A(3), A(1),
 211         A(2), A(2), A(11), A(11),  0, 0, 0, A(1)
 212 };
 213 static const unsigned char sr_dac_mult_table[] = {
 214         A(2), A(12), A(2), A(12),  0, 0, A(3), A(1),
 215         A(2), A(11), A(2), A(11),  0, 0, 0, A(1)
 216 };
 217
 218 static unsigned get_score(int adc, int adc_l, int adc_h, int need_adc,
 219                 int dac, int dac_l, int dac_h, int need_dac)
 220 {
 221         if ((adc >= adc_l) && (adc <= adc_h) &&
 222                         (dac >= dac_l) && (dac <= dac_h)) {
 223                 int diff_adc = need_adc - adc;
 224                 int diff_dac = need_dac - dac;
 225                 return abs(diff_adc) + abs(diff_dac);
 226         }
 227         return UINT_MAX;
 228 }
 229
 230 static int find_rate(int mclk, u32 need_adc, u32 need_dac)
 231 {
 232         int i, j;
 233         int best_i = -1;
 234         int best_j = -1;
 235         int best_div = 0;
 236         unsigned best_score = UINT_MAX;
 237         int adc_l, adc_h, dac_l, dac_h;
 238
 239         need_adc *= SR_MULT;
 240         need_dac *= SR_MULT;
 241         /*
 242          * rates given are +/- 1/32
 243          */
 244         adc_l = need_adc - (need_adc >> 5);
 245         adc_h = need_adc + (need_adc >> 5);
 246         dac_l = need_dac - (need_dac >> 5);
 247         dac_h = need_dac + (need_dac >> 5);
 248         for (i = 0; i < ARRAY_SIZE(bosr_usb_divisor_table); i++) {
 249                 int base = mclk / bosr_usb_divisor_table[i];
 250                 int mask = sr_valid_mask[i];
 251                 for (j = 0; j < ARRAY_SIZE(sr_adc_mult_table);
 252                                 j++, mask >>= 1) {
 253                         int adc;
 254                         int dac;
 255                         int score;
 256                         if ((mask & 1) == 0)
 257                                 continue;
 258                         adc = base * sr_adc_mult_table[j];
 259                         dac = base * sr_dac_mult_table[j];
 260                         score = get_score(adc, adc_l, adc_h, need_adc,
 261                                         dac, dac_l, dac_h, need_dac);
 262                         if (best_score > score) {
 263                                 best_score = score;
 264                                 best_i = i;
 265                                 best_j = j;
 266                                 best_div = 0;
 267                         }
 268                         score = get_score((adc >> 1), adc_l, adc_h, need_adc,
 269                                         (dac >> 1), dac_l, dac_h, need_dac);
 270                         /* prefer to have a /2 */
 271                         if ((score != UINT_MAX) && (best_score >= score)) {
 272                                 best_score = score;
 273                                 best_i = i;
 274                                 best_j = j;
 275                                 best_div = 1;
 276                         }
 277                 }
 278         }
 279         return (best_j << 2) | best_i | (best_div << TLV320AIC23_CLKIN_SHIFT);
 280 }
 281
 282 #ifdef DEBUG
 283 static void get_current_sample_rates(struct snd_soc_codec *codec, int mclk,
 284                 u32 *sample_rate_adc, u32 *sample_rate_dac)
 285 {
 286         int src = snd_soc_read(codec, TLV320AIC23_SRATE);
 287         int sr = (src >> 2) & 0x0f;
 288         int val = (mclk / bosr_usb_divisor_table[src & 3]);
 289         int adc = (val * sr_adc_mult_table[sr]) / SR_MULT;
 290         int dac = (val * sr_dac_mult_table[sr]) / SR_MULT;
 291         if (src & TLV320AIC23_CLKIN_HALF) {
 292                 adc >>= 1;
 293                 dac >>= 1;
 294         }
 295         *sample_rate_adc = adc;
 296         *sample_rate_dac = dac;
 297 }
 298 #endif
 299
 300 static int set_sample_rate_control(struct snd_soc_codec *codec, int mclk,
 301                 u32 sample_rate_adc, u32 sample_rate_dac)
 302 {
 303         /* Search for the right sample rate */
 304         int data = find_rate(mclk, sample_rate_adc, sample_rate_dac);
 305         if (data < 0) {
 306                 printk(KERN_ERR "%s:Invalid rate %u,%u requested\n",
 307                                 __func__, sample_rate_adc, sample_rate_dac);
 308                 return -EINVAL;
 309         }
 310         snd_soc_write(codec, TLV320AIC23_SRATE, data);
 311 #ifdef DEBUG
 312         {
 313                 u32 adc, dac;
 314                 get_current_sample_rates(codec, mclk, &adc, &dac);
 315                 printk(KERN_DEBUG "actual samplerate = %u,%u reg=%x\n",
 316                         adc, dac, data);
 317         }
 318 #endif
 319         return 0;
 320 }
 321
 322 static int tlv320aic23_hw_params(struct snd_pcm_substream *substream,
 323                                  struct snd_pcm_hw_params *params,
 324                                  struct snd_soc_dai *dai)
 325 {
 326         struct snd_soc_codec *codec = dai->codec;
 327         u16 iface_reg;
 328         int ret;
 329         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
 330         u32 sample_rate_adc = aic23->requested_adc;
 331         u32 sample_rate_dac = aic23->requested_dac;
 332         u32 sample_rate = params_rate(params);
 333
 334         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 335                 aic23->requested_dac = sample_rate_dac = sample_rate;
 336                 if (!sample_rate_adc)
 337                         sample_rate_adc = sample_rate;
 338         } else {
 339                 aic23->requested_adc = sample_rate_adc = sample_rate;
 340                 if (!sample_rate_dac)
 341                         sample_rate_dac = sample_rate;
 342         }
 343         ret = set_sample_rate_control(codec, aic23->mclk, sample_rate_adc,
 344                         sample_rate_dac);
 345         if (ret < 0)
 346                 return ret;
 347
 348         iface_reg = snd_soc_read(codec, TLV320AIC23_DIGT_FMT) & ~(0x03 << 2);
 349
 350         switch (params_format(params)) {
 351         case SNDRV_PCM_FORMAT_S16_LE:
 352                 break;
 353         case SNDRV_PCM_FORMAT_S20_3LE:
 354                 iface_reg |= (0x01 << 2);
 355                 break;
 356         case SNDRV_PCM_FORMAT_S24_LE:
 357                 iface_reg |= (0x02 << 2);
 358                 break;
 359         case SNDRV_PCM_FORMAT_S32_LE:
 360                 iface_reg |= (0x03 << 2);
 361                 break;
 362         }
 363         snd_soc_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
 364
 365         return 0;
 366 }
 367
 368 static int tlv320aic23_pcm_prepare(struct snd_pcm_substream *substream,
 369                                    struct snd_soc_dai *dai)
 370 {
 371         struct snd_soc_codec *codec = dai->codec;
 372
 373         /* set active */
 374         snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x0001);
 375
 376         return 0;
 377 }
 378
 379 static void tlv320aic23_shutdown(struct snd_pcm_substream *substream,
 380                                  struct snd_soc_dai *dai)
 381 {
 382         struct snd_soc_codec *codec = dai->codec;
 383         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
 384
 385         /* deactivate */
 386         if (!codec->active) {
 387                 udelay(50);
 388                 snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x0);
 389         }
 390         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 391                 aic23->requested_dac = 0;
 392         else
 393                 aic23->requested_adc = 0;
 394 }
 395
 396 static int tlv320aic23_mute(struct snd_soc_dai *dai, int mute)
 397 {
 398         struct snd_soc_codec *codec = dai->codec;
 399         u16 reg;
 400
 401         reg = snd_soc_read(codec, TLV320AIC23_DIGT);
 402         if (mute)
 403                 reg |= TLV320AIC23_DACM_MUTE;
 404
 405         else
 406                 reg &= ~TLV320AIC23_DACM_MUTE;
 407
 408         snd_soc_write(codec, TLV320AIC23_DIGT, reg);
 409
 410         return 0;
 411 }
 412
 413 static int tlv320aic23_set_dai_fmt(struct snd_soc_dai *codec_dai,
 414                                    unsigned int fmt)
 415 {
 416         struct snd_soc_codec *codec = codec_dai->codec;
 417         u16 iface_reg;
 418
 419         iface_reg = snd_soc_read(codec, TLV320AIC23_DIGT_FMT) & (~0x03);
 420
 421         /* set master/slave audio interface */
 422         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 423         case SND_SOC_DAIFMT_CBM_CFM:
 424                 iface_reg |= TLV320AIC23_MS_MASTER;
 425                 break;
 426         case SND_SOC_DAIFMT_CBS_CFS:
 427                 iface_reg &= ~TLV320AIC23_MS_MASTER;
 428                 break;
 429         default:
 430                 return -EINVAL;
 431
 432         }
 433
 434         /* interface format */
 435         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 436         case SND_SOC_DAIFMT_I2S:
 437                 iface_reg |= TLV320AIC23_FOR_I2S;
 438                 break;
 439         case SND_SOC_DAIFMT_DSP_A:
 440                 iface_reg |= TLV320AIC23_LRP_ON;
 441         case SND_SOC_DAIFMT_DSP_B:
 442                 iface_reg |= TLV320AIC23_FOR_DSP;
 443                 break;
 444         case SND_SOC_DAIFMT_RIGHT_J:
 445                 break;
 446         case SND_SOC_DAIFMT_LEFT_J:
 447                 iface_reg |= TLV320AIC23_FOR_LJUST;
 448                 break;
 449         default:
 450                 return -EINVAL;
 451
 452         }
 453
 454         snd_soc_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
 455
 456         return 0;
 457 }
 458
 459 static int tlv320aic23_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 460                                       int clk_id, unsigned int freq, int dir)
 461 {
 462         struct aic23 *aic23 = snd_soc_dai_get_drvdata(codec_dai);
 463         aic23->mclk = freq;
 464         return 0;
 465 }
 466
 467 static int tlv320aic23_set_bias_level(struct snd_soc_codec *codec,
 468                                       enum snd_soc_bias_level level)
 469 {
 470         u16 reg = snd_soc_read(codec, TLV320AIC23_PWR) & 0x17f;
 471
 472         switch (level) {
 473         case SND_SOC_BIAS_ON:
 474                 /* vref/mid, osc on, dac unmute */
 475                 reg &= ~(TLV320AIC23_DEVICE_PWR_OFF | TLV320AIC23_OSC_OFF | \
 476                         TLV320AIC23_DAC_OFF);
 477                 snd_soc_write(codec, TLV320AIC23_PWR, reg);
 478                 break;
 479         case SND_SOC_BIAS_PREPARE:
 480                 break;
 481         case SND_SOC_BIAS_STANDBY:
 482                 /* everything off except vref/vmid, */
 483                 snd_soc_write(codec, TLV320AIC23_PWR,
 484                               reg | TLV320AIC23_CLK_OFF);
 485                 break;
 486         case SND_SOC_BIAS_OFF:
 487                 /* everything off, dac mute, inactive */
 488                 snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x0);
 489                 snd_soc_write(codec, TLV320AIC23_PWR, 0x1ff);
 490                 break;
 491         }
 492         codec->dapm.bias_level = level;
 493         return 0;
 494 }
 495
 496 #define AIC23_RATES     SNDRV_PCM_RATE_8000_96000
 497 #define AIC23_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 498                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)
 499
 500 static const struct snd_soc_dai_ops tlv320aic23_dai_ops = {
 501         .prepare        = tlv320aic23_pcm_prepare,
 502         .hw_params      = tlv320aic23_hw_params,
 503         .shutdown       = tlv320aic23_shutdown,
 504         .digital_mute   = tlv320aic23_mute,
 505         .set_fmt        = tlv320aic23_set_dai_fmt,
 506         .set_sysclk     = tlv320aic23_set_dai_sysclk,
 507 };
 508
 509 static struct snd_soc_dai_driver tlv320aic23_dai = {
 510         .name = "tlv320aic23-hifi",
 511         .playback = {
 512                      .stream_name = "Playback",
 513                      .channels_min = 2,
 514                      .channels_max = 2,
 515                      .rates = AIC23_RATES,
 516                      .formats = AIC23_FORMATS,},
 517         .capture = {
 518                     .stream_name = "Capture",
 519                     .channels_min = 2,
 520                     .channels_max = 2,
 521                     .rates = AIC23_RATES,
 522                     .formats = AIC23_FORMATS,},
 523         .ops = &tlv320aic23_dai_ops,
 524 };
 525
 526 static int tlv320aic23_suspend(struct snd_soc_codec *codec)
 527 {
 528         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
 529
 530         return 0;
 531 }
 532
 533 static int tlv320aic23_resume(struct snd_soc_codec *codec)
 534 {
 535         snd_soc_cache_sync(codec);
 536         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 537
 538         return 0;
 539 }
 540
 541 static int tlv320aic23_probe(struct snd_soc_codec *codec)
 542 {
 543         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
 544         int ret;
 545
 546         ret = snd_soc_codec_set_cache_io(codec, 7, 9, aic23->control_type);
 547         if (ret < 0) {
 548                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 549                 return ret;
 550         }
 551
 552         /* Reset codec */
 553         snd_soc_write(codec, TLV320AIC23_RESET, 0);
 554
 555         /* Write the register default value to cache for reserved registers,
 556          * so the write to the these registers are suppressed by the cache
 557          * restore code when it skips writes of default registers.
 558          */
 559         snd_soc_cache_write(codec, 0x0A, 0);
 560         snd_soc_cache_write(codec, 0x0B, 0);
 561         snd_soc_cache_write(codec, 0x0C, 0);
 562         snd_soc_cache_write(codec, 0x0D, 0);
 563         snd_soc_cache_write(codec, 0x0E, 0);
 564
 565         /* power on device */
 566         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 567
 568         snd_soc_write(codec, TLV320AIC23_DIGT, TLV320AIC23_DEEMP_44K);
 569
 570         /* Unmute input */
 571         snd_soc_update_bits(codec, TLV320AIC23_LINVOL,
 572                             TLV320AIC23_LIM_MUTED, TLV320AIC23_LRS_ENABLED);
 573
 574         snd_soc_update_bits(codec, TLV320AIC23_RINVOL,
 575                             TLV320AIC23_LIM_MUTED, TLV320AIC23_LRS_ENABLED);
 576
 577         snd_soc_update_bits(codec, TLV320AIC23_ANLG,
 578                             TLV320AIC23_BYPASS_ON | TLV320AIC23_MICM_MUTED,
 579                             0);
 580
 581         /* Default output volume */
 582         snd_soc_write(codec, TLV320AIC23_LCHNVOL,
 583                       TLV320AIC23_DEFAULT_OUT_VOL & TLV320AIC23_OUT_VOL_MASK);
 584         snd_soc_write(codec, TLV320AIC23_RCHNVOL,
 585                       TLV320AIC23_DEFAULT_OUT_VOL & TLV320AIC23_OUT_VOL_MASK);
 586
 587         snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x1);
 588
 589         snd_soc_add_codec_controls(codec, tlv320aic23_snd_controls,
 590                                 ARRAY_SIZE(tlv320aic23_snd_controls));
 591
 592         return 0;
 593 }
 594
 595 static int tlv320aic23_remove(struct snd_soc_codec *codec)
 596 {
 597         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
 598         return 0;
 599 }
 600
 601 static struct snd_soc_codec_driver soc_codec_dev_tlv320aic23 = {
 602         .reg_cache_size = ARRAY_SIZE(tlv320aic23_reg),
 603         .reg_word_size = sizeof(u16),
 604         .reg_cache_default = tlv320aic23_reg,
 605         .probe = tlv320aic23_probe,
 606         .remove = tlv320aic23_remove,
 607         .suspend = tlv320aic23_suspend,
 608         .resume = tlv320aic23_resume,
 609         .set_bias_level = tlv320aic23_set_bias_level,
 610         .dapm_widgets = tlv320aic23_dapm_widgets,
 611         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
 612         .dapm_routes = tlv320aic23_intercon,
 613         .num_dapm_routes = ARRAY_SIZE(tlv320aic23_intercon),
 614 };
 615
 616 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 617 /*
 618  * If the i2c layer weren't so broken, we could pass this kind of data
 619  * around
 620  */
 621 static int tlv320aic23_codec_probe(struct i2c_client *i2c,
 622                                    const struct i2c_device_id *i2c_id)
 623 {
 624         struct aic23 *aic23;
 625         int ret;
 626
 627         if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 628                 return -EINVAL;
 629
 630         aic23 = devm_kzalloc(&i2c->dev, sizeof(struct aic23), GFP_KERNEL);
 631         if (aic23 == NULL)
 632                 return -ENOMEM;
 633
 634         i2c_set_clientdata(i2c, aic23);
 635         aic23->control_type = SND_SOC_I2C;
 636
 637         ret =  snd_soc_register_codec(&i2c->dev,
 638                         &soc_codec_dev_tlv320aic23, &tlv320aic23_dai, 1);
 639         return ret;
 640 }
 641 static int __exit tlv320aic23_i2c_remove(struct i2c_client *i2c)
 642 {
 643         snd_soc_unregister_codec(&i2c->dev);
 644         return 0;
 645 }
 646
 647 static const struct i2c_device_id tlv320aic23_id[] = {
 648         {"tlv320aic23", 0},
 649         {}
 650 };
 651
 652 MODULE_DEVICE_TABLE(i2c, tlv320aic23_id);
 653
 654 static struct i2c_driver tlv320aic23_i2c_driver = {
 655         .driver = {
 656                    .name = "tlv320aic23-codec",
 657                    },
 658         .probe = tlv320aic23_codec_probe,
 659         .remove = __exit_p(tlv320aic23_i2c_remove),
 660         .id_table = tlv320aic23_id,
 661 };
 662
 663 #endif
 664
 665 static int __init tlv320aic23_modinit(void)
 666 {
 667         int ret;
 668 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 669         ret = i2c_add_driver(&tlv320aic23_i2c_driver);
 670         if (ret != 0) {
 671                 printk(KERN_ERR "Failed to register TLV320AIC23 I2C driver: %d\n",
 672                        ret);
 673         }
 674 #endif
 675         return ret;
 676 }
 677 module_init(tlv320aic23_modinit);
 678
 679 static void __exit tlv320aic23_exit(void)
 680 {
 681 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 682         i2c_del_driver(&tlv320aic23_i2c_driver);
 683 #endif
 684 }
 685 module_exit(tlv320aic23_exit);
 686
 687 MODULE_DESCRIPTION("ASoC TLV320AIC23 codec driver");
 688 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 689 MODULE_LICENSE("GPL");