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 #define AIC23_VERSION "0.1"
  38
  39 /*
  40  * AIC23 register cache
  41  */
  42 static const u16 tlv320aic23_reg[] = {
  43         0x0097, 0x0097, 0x00F9, 0x00F9, /* 0 */
  44         0x001A, 0x0004, 0x0007, 0x0001, /* 4 */
  45         0x0020, 0x0000, 0x0000, 0x0000, /* 8 */
  46         0x0000, 0x0000, 0x0000, 0x0000, /* 12 */
  47 };
  48
  49 static const char *rec_src_text[] = { "Line", "Mic" };
  50 static const char *deemph_text[] = {"None", "32Khz", "44.1Khz", "48Khz"};
  51
  52 static const struct soc_enum rec_src_enum =
  53         SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);
  54
  55 static const struct snd_kcontrol_new tlv320aic23_rec_src_mux_controls =
  56 SOC_DAPM_ENUM("Input Select", rec_src_enum);
  57
  58 static const struct soc_enum tlv320aic23_rec_src =
  59         SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);
  60 static const struct soc_enum tlv320aic23_deemph =
  61         SOC_ENUM_SINGLE(TLV320AIC23_DIGT, 1, 4, deemph_text);
  62
  63 static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -12100, 100, 0);
  64 static const DECLARE_TLV_DB_SCALE(input_gain_tlv, -1725, 75, 0);
  65 static const DECLARE_TLV_DB_SCALE(sidetone_vol_tlv, -1800, 300, 0);
  66
  67 static int snd_soc_tlv320aic23_put_volsw(struct snd_kcontrol *kcontrol,
  68         struct snd_ctl_elem_value *ucontrol)
  69 {
  70         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
  71         u16 val, reg;
  72
  73         val = (ucontrol->value.integer.value[0] & 0x07);
  74
  75         /* linear conversion to userspace
  76         * 000   =       -6db
  77         * 001   =       -9db
  78         * 010   =       -12db
  79         * 011   =       -18db (Min)
  80         * 100   =       0db (Max)
  81         */
  82         val = (val >= 4) ? 4  : (3 - val);
  83
  84         reg = snd_soc_read(codec, TLV320AIC23_ANLG) & (~0x1C0);
  85         snd_soc_write(codec, TLV320AIC23_ANLG, reg | (val << 6));
  86
  87         return 0;
  88 }
  89
  90 static int snd_soc_tlv320aic23_get_volsw(struct snd_kcontrol *kcontrol,
  91         struct snd_ctl_elem_value *ucontrol)
  92 {
  93         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
  94         u16 val;
  95
  96         val = snd_soc_read(codec, TLV320AIC23_ANLG) & (0x1C0);
  97         val = val >> 6;
  98         val = (val >= 4) ? 4  : (3 -  val);
  99         ucontrol->value.integer.value[0] = val;
 100         return 0;
 101
 102 }
 103
 104 static const struct snd_kcontrol_new tlv320aic23_snd_controls[] = {
 105         SOC_DOUBLE_R_TLV("Digital Playback Volume", TLV320AIC23_LCHNVOL,
 106                          TLV320AIC23_RCHNVOL, 0, 127, 0, out_gain_tlv),
 107         SOC_SINGLE("Digital Playback Switch", TLV320AIC23_DIGT, 3, 1, 1),
 108         SOC_DOUBLE_R("Line Input Switch", TLV320AIC23_LINVOL,
 109                      TLV320AIC23_RINVOL, 7, 1, 0),
 110         SOC_DOUBLE_R_TLV("Line Input Volume", TLV320AIC23_LINVOL,
 111                          TLV320AIC23_RINVOL, 0, 31, 0, input_gain_tlv),
 112         SOC_SINGLE("Mic Input Switch", TLV320AIC23_ANLG, 1, 1, 1),
 113         SOC_SINGLE("Mic Booster Switch", TLV320AIC23_ANLG, 0, 1, 0),
 114         SOC_SINGLE_EXT_TLV("Sidetone Volume", TLV320AIC23_ANLG, 6, 4, 0,
 115                            snd_soc_tlv320aic23_get_volsw,
 116                            snd_soc_tlv320aic23_put_volsw, sidetone_vol_tlv),
 117         SOC_ENUM("Playback De-emphasis", tlv320aic23_deemph),
 118 };
 119
 120 /* PGA Mixer controls for Line and Mic switch */
 121 static const struct snd_kcontrol_new tlv320aic23_output_mixer_controls[] = {
 122         SOC_DAPM_SINGLE("Line Bypass Switch", TLV320AIC23_ANLG, 3, 1, 0),
 123         SOC_DAPM_SINGLE("Mic Sidetone Switch", TLV320AIC23_ANLG, 5, 1, 0),
 124         SOC_DAPM_SINGLE("Playback Switch", TLV320AIC23_ANLG, 4, 1, 0),
 125 };
 126
 127 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
 128         SND_SOC_DAPM_DAC("DAC", "Playback", TLV320AIC23_PWR, 3, 1),
 129         SND_SOC_DAPM_ADC("ADC", "Capture", TLV320AIC23_PWR, 2, 1),
 130         SND_SOC_DAPM_MUX("Capture Source", SND_SOC_NOPM, 0, 0,
 131                          &tlv320aic23_rec_src_mux_controls),
 132         SND_SOC_DAPM_MIXER("Output Mixer", TLV320AIC23_PWR, 4, 1,
 133                            &tlv320aic23_output_mixer_controls[0],
 134                            ARRAY_SIZE(tlv320aic23_output_mixer_controls)),
 135         SND_SOC_DAPM_PGA("Line Input", TLV320AIC23_PWR, 0, 1, NULL, 0),
 136         SND_SOC_DAPM_PGA("Mic Input", TLV320AIC23_PWR, 1, 1, NULL, 0),
 137
 138         SND_SOC_DAPM_OUTPUT("LHPOUT"),
 139         SND_SOC_DAPM_OUTPUT("RHPOUT"),
 140         SND_SOC_DAPM_OUTPUT("LOUT"),
 141         SND_SOC_DAPM_OUTPUT("ROUT"),
 142
 143         SND_SOC_DAPM_INPUT("LLINEIN"),
 144         SND_SOC_DAPM_INPUT("RLINEIN"),
 145
 146         SND_SOC_DAPM_INPUT("MICIN"),
 147 };
 148
 149 static const struct snd_soc_dapm_route tlv320aic23_intercon[] = {
 150         /* Output Mixer */
 151         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 152         {"Output Mixer", "Playback Switch", "DAC"},
 153         {"Output Mixer", "Mic Sidetone Switch", "Mic Input"},
 154
 155         /* Outputs */
 156         {"RHPOUT", NULL, "Output Mixer"},
 157         {"LHPOUT", NULL, "Output Mixer"},
 158         {"LOUT", NULL, "Output Mixer"},
 159         {"ROUT", NULL, "Output Mixer"},
 160
 161         /* Inputs */
 162         {"Line Input", "NULL", "LLINEIN"},
 163         {"Line Input", "NULL", "RLINEIN"},
 164
 165         {"Mic Input", "NULL", "MICIN"},
 166
 167         /* input mux */
 168         {"Capture Source", "Line", "Line Input"},
 169         {"Capture Source", "Mic", "Mic Input"},
 170         {"ADC", NULL, "Capture Source"},
 171
 172 };
 173
 174 /* AIC23 driver data */
 175 struct aic23 {
 176         enum snd_soc_control_type control_type;
 177         int mclk;
 178         int requested_adc;
 179         int requested_dac;
 180 };
 181
 182 /*
 183  * Common Crystals used
 184  * 11.2896 Mhz /128 = *88.2k  /192 = 58.8k
 185  * 12.0000 Mhz /125 = *96k    /136 = 88.235K
 186  * 12.2880 Mhz /128 = *96k    /192 = 64k
 187  * 16.9344 Mhz /128 = 132.3k /192 = *88.2k
 188  * 18.4320 Mhz /128 = 144k   /192 = *96k
 189  */
 190
 191 /*
 192  * Normal BOSR 0-256/2 = 128, 1-384/2 = 192
 193  * USB BOSR 0-250/2 = 125, 1-272/2 = 136
 194  */
 195 static const int bosr_usb_divisor_table[] = {
 196         128, 125, 192, 136
 197 };
 198 #define LOWER_GROUP ((1<<0) | (1<<1) | (1<<2) | (1<<3) | (1<<6) | (1<<7))
 199 #define UPPER_GROUP ((1<<8) | (1<<9) | (1<<10) | (1<<11)        | (1<<15))
 200 static const unsigned short sr_valid_mask[] = {
 201         LOWER_GROUP|UPPER_GROUP,        /* Normal, bosr - 0*/
 202         LOWER_GROUP,                    /* Usb, bosr - 0*/
 203         LOWER_GROUP|UPPER_GROUP,        /* Normal, bosr - 1*/
 204         UPPER_GROUP,                    /* Usb, bosr - 1*/
 205 };
 206 /*
 207  * Every divisor is a factor of 11*12
 208  */
 209 #define SR_MULT (11*12)
 210 #define A(x) (SR_MULT/x)
 211 static const unsigned char sr_adc_mult_table[] = {
 212         A(2), A(2), A(12), A(12),  0, 0, A(3), A(1),
 213         A(2), A(2), A(11), A(11),  0, 0, 0, A(1)
 214 };
 215 static const unsigned char sr_dac_mult_table[] = {
 216         A(2), A(12), A(2), A(12),  0, 0, A(3), A(1),
 217         A(2), A(11), A(2), A(11),  0, 0, 0, A(1)
 218 };
 219
 220 static unsigned get_score(int adc, int adc_l, int adc_h, int need_adc,
 221                 int dac, int dac_l, int dac_h, int need_dac)
 222 {
 223         if ((adc >= adc_l) && (adc <= adc_h) &&
 224                         (dac >= dac_l) && (dac <= dac_h)) {
 225                 int diff_adc = need_adc - adc;
 226                 int diff_dac = need_dac - dac;
 227                 return abs(diff_adc) + abs(diff_dac);
 228         }
 229         return UINT_MAX;
 230 }
 231
 232 static int find_rate(int mclk, u32 need_adc, u32 need_dac)
 233 {
 234         int i, j;
 235         int best_i = -1;
 236         int best_j = -1;
 237         int best_div = 0;
 238         unsigned best_score = UINT_MAX;
 239         int adc_l, adc_h, dac_l, dac_h;
 240
 241         need_adc *= SR_MULT;
 242         need_dac *= SR_MULT;
 243         /*
 244          * rates given are +/- 1/32
 245          */
 246         adc_l = need_adc - (need_adc >> 5);
 247         adc_h = need_adc + (need_adc >> 5);
 248         dac_l = need_dac - (need_dac >> 5);
 249         dac_h = need_dac + (need_dac >> 5);
 250         for (i = 0; i < ARRAY_SIZE(bosr_usb_divisor_table); i++) {
 251                 int base = mclk / bosr_usb_divisor_table[i];
 252                 int mask = sr_valid_mask[i];
 253                 for (j = 0; j < ARRAY_SIZE(sr_adc_mult_table);
 254                                 j++, mask >>= 1) {
 255                         int adc;
 256                         int dac;
 257                         int score;
 258                         if ((mask & 1) == 0)
 259                                 continue;
 260                         adc = base * sr_adc_mult_table[j];
 261                         dac = base * sr_dac_mult_table[j];
 262                         score = get_score(adc, adc_l, adc_h, need_adc,
 263                                         dac, dac_l, dac_h, need_dac);
 264                         if (best_score > score) {
 265                                 best_score = score;
 266                                 best_i = i;
 267                                 best_j = j;
 268                                 best_div = 0;
 269                         }
 270                         score = get_score((adc >> 1), adc_l, adc_h, need_adc,
 271                                         (dac >> 1), dac_l, dac_h, need_dac);
 272                         /* prefer to have a /2 */
 273                         if ((score != UINT_MAX) && (best_score >= score)) {
 274                                 best_score = score;
 275                                 best_i = i;
 276                                 best_j = j;
 277                                 best_div = 1;
 278                         }
 279                 }
 280         }
 281         return (best_j << 2) | best_i | (best_div << TLV320AIC23_CLKIN_SHIFT);
 282 }
 283
 284 #ifdef DEBUG
 285 static void get_current_sample_rates(struct snd_soc_codec *codec, int mclk,
 286                 u32 *sample_rate_adc, u32 *sample_rate_dac)
 287 {
 288         int src = snd_soc_read(codec, TLV320AIC23_SRATE);
 289         int sr = (src >> 2) & 0x0f;
 290         int val = (mclk / bosr_usb_divisor_table[src & 3]);
 291         int adc = (val * sr_adc_mult_table[sr]) / SR_MULT;
 292         int dac = (val * sr_dac_mult_table[sr]) / SR_MULT;
 293         if (src & TLV320AIC23_CLKIN_HALF) {
 294                 adc >>= 1;
 295                 dac >>= 1;
 296         }
 297         *sample_rate_adc = adc;
 298         *sample_rate_dac = dac;
 299 }
 300 #endif
 301
 302 static int set_sample_rate_control(struct snd_soc_codec *codec, int mclk,
 303                 u32 sample_rate_adc, u32 sample_rate_dac)
 304 {
 305         /* Search for the right sample rate */
 306         int data = find_rate(mclk, sample_rate_adc, sample_rate_dac);
 307         if (data < 0) {
 308                 printk(KERN_ERR "%s:Invalid rate %u,%u requested\n",
 309                                 __func__, sample_rate_adc, sample_rate_dac);
 310                 return -EINVAL;
 311         }
 312         snd_soc_write(codec, TLV320AIC23_SRATE, data);
 313 #ifdef DEBUG
 314         {
 315                 u32 adc, dac;
 316                 get_current_sample_rates(codec, mclk, &adc, &dac);
 317                 printk(KERN_DEBUG "actual samplerate = %u,%u reg=%x\n",
 318                         adc, dac, data);
 319         }
 320 #endif
 321         return 0;
 322 }
 323
 324 static int tlv320aic23_hw_params(struct snd_pcm_substream *substream,
 325                                  struct snd_pcm_hw_params *params,
 326                                  struct snd_soc_dai *dai)
 327 {
 328         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 329         struct snd_soc_codec *codec = rtd->codec;
 330         u16 iface_reg;
 331         int ret;
 332         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
 333         u32 sample_rate_adc = aic23->requested_adc;
 334         u32 sample_rate_dac = aic23->requested_dac;
 335         u32 sample_rate = params_rate(params);
 336
 337         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 338                 aic23->requested_dac = sample_rate_dac = sample_rate;
 339                 if (!sample_rate_adc)
 340                         sample_rate_adc = sample_rate;
 341         } else {
 342                 aic23->requested_adc = sample_rate_adc = sample_rate;
 343                 if (!sample_rate_dac)
 344                         sample_rate_dac = sample_rate;
 345         }
 346         ret = set_sample_rate_control(codec, aic23->mclk, sample_rate_adc,
 347                         sample_rate_dac);
 348         if (ret < 0)
 349                 return ret;
 350
 351         iface_reg = snd_soc_read(codec, TLV320AIC23_DIGT_FMT) & ~(0x03 << 2);
 352
 353         switch (params_format(params)) {
 354         case SNDRV_PCM_FORMAT_S16_LE:
 355                 break;
 356         case SNDRV_PCM_FORMAT_S20_3LE:
 357                 iface_reg |= (0x01 << 2);
 358                 break;
 359         case SNDRV_PCM_FORMAT_S24_LE:
 360                 iface_reg |= (0x02 << 2);
 361                 break;
 362         case SNDRV_PCM_FORMAT_S32_LE:
 363                 iface_reg |= (0x03 << 2);
 364                 break;
 365         }
 366         snd_soc_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
 367
 368         return 0;
 369 }
 370
 371 static int tlv320aic23_pcm_prepare(struct snd_pcm_substream *substream,
 372                                    struct snd_soc_dai *dai)
 373 {
 374         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 375         struct snd_soc_codec *codec = rtd->codec;
 376
 377         /* set active */
 378         snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x0001);
 379
 380         return 0;
 381 }
 382
 383 static void tlv320aic23_shutdown(struct snd_pcm_substream *substream,
 384                                  struct snd_soc_dai *dai)
 385 {
 386         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 387         struct snd_soc_codec *codec = rtd->codec;
 388         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
 389
 390         /* deactivate */
 391         if (!codec->active) {
 392                 udelay(50);
 393                 snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x0);
 394         }
 395         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 396                 aic23->requested_dac = 0;
 397         else
 398                 aic23->requested_adc = 0;
 399 }
 400
 401 static int tlv320aic23_mute(struct snd_soc_dai *dai, int mute)
 402 {
 403         struct snd_soc_codec *codec = dai->codec;
 404         u16 reg;
 405
 406         reg = snd_soc_read(codec, TLV320AIC23_DIGT);
 407         if (mute)
 408                 reg |= TLV320AIC23_DACM_MUTE;
 409
 410         else
 411                 reg &= ~TLV320AIC23_DACM_MUTE;
 412
 413         snd_soc_write(codec, TLV320AIC23_DIGT, reg);
 414
 415         return 0;
 416 }
 417
 418 static int tlv320aic23_set_dai_fmt(struct snd_soc_dai *codec_dai,
 419                                    unsigned int fmt)
 420 {
 421         struct snd_soc_codec *codec = codec_dai->codec;
 422         u16 iface_reg;
 423
 424         iface_reg = snd_soc_read(codec, TLV320AIC23_DIGT_FMT) & (~0x03);
 425
 426         /* set master/slave audio interface */
 427         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 428         case SND_SOC_DAIFMT_CBM_CFM:
 429                 iface_reg |= TLV320AIC23_MS_MASTER;
 430                 break;
 431         case SND_SOC_DAIFMT_CBS_CFS:
 432                 iface_reg &= ~TLV320AIC23_MS_MASTER;
 433                 break;
 434         default:
 435                 return -EINVAL;
 436
 437         }
 438
 439         /* interface format */
 440         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 441         case SND_SOC_DAIFMT_I2S:
 442                 iface_reg |= TLV320AIC23_FOR_I2S;
 443                 break;
 444         case SND_SOC_DAIFMT_DSP_A:
 445                 iface_reg |= TLV320AIC23_LRP_ON;
 446         case SND_SOC_DAIFMT_DSP_B:
 447                 iface_reg |= TLV320AIC23_FOR_DSP;
 448                 break;
 449         case SND_SOC_DAIFMT_RIGHT_J:
 450                 break;
 451         case SND_SOC_DAIFMT_LEFT_J:
 452                 iface_reg |= TLV320AIC23_FOR_LJUST;
 453                 break;
 454         default:
 455                 return -EINVAL;
 456
 457         }
 458
 459         snd_soc_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
 460
 461         return 0;
 462 }
 463
 464 static int tlv320aic23_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 465                                       int clk_id, unsigned int freq, int dir)
 466 {
 467         struct aic23 *aic23 = snd_soc_dai_get_drvdata(codec_dai);
 468         aic23->mclk = freq;
 469         return 0;
 470 }
 471
 472 static int tlv320aic23_set_bias_level(struct snd_soc_codec *codec,
 473                                       enum snd_soc_bias_level level)
 474 {
 475         u16 reg = snd_soc_read(codec, TLV320AIC23_PWR) & 0x17f;
 476
 477         switch (level) {
 478         case SND_SOC_BIAS_ON:
 479                 /* vref/mid, osc on, dac unmute */
 480                 reg &= ~(TLV320AIC23_DEVICE_PWR_OFF | TLV320AIC23_OSC_OFF | \
 481                         TLV320AIC23_DAC_OFF);
 482                 snd_soc_write(codec, TLV320AIC23_PWR, reg);
 483                 break;
 484         case SND_SOC_BIAS_PREPARE:
 485                 break;
 486         case SND_SOC_BIAS_STANDBY:
 487                 /* everything off except vref/vmid, */
 488                 snd_soc_write(codec, TLV320AIC23_PWR,
 489                               reg | TLV320AIC23_CLK_OFF);
 490                 break;
 491         case SND_SOC_BIAS_OFF:
 492                 /* everything off, dac mute, inactive */
 493                 snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x0);
 494                 snd_soc_write(codec, TLV320AIC23_PWR, 0x1ff);
 495                 break;
 496         }
 497         codec->dapm.bias_level = level;
 498         return 0;
 499 }
 500
 501 #define AIC23_RATES     SNDRV_PCM_RATE_8000_96000
 502 #define AIC23_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 503                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)
 504
 505 static const struct snd_soc_dai_ops tlv320aic23_dai_ops = {
 506         .prepare        = tlv320aic23_pcm_prepare,
 507         .hw_params      = tlv320aic23_hw_params,
 508         .shutdown       = tlv320aic23_shutdown,
 509         .digital_mute   = tlv320aic23_mute,
 510         .set_fmt        = tlv320aic23_set_dai_fmt,
 511         .set_sysclk     = tlv320aic23_set_dai_sysclk,
 512 };
 513
 514 static struct snd_soc_dai_driver tlv320aic23_dai = {
 515         .name = "tlv320aic23-hifi",
 516         .playback = {
 517                      .stream_name = "Playback",
 518                      .channels_min = 2,
 519                      .channels_max = 2,
 520                      .rates = AIC23_RATES,
 521                      .formats = AIC23_FORMATS,},
 522         .capture = {
 523                     .stream_name = "Capture",
 524                     .channels_min = 2,
 525                     .channels_max = 2,
 526                     .rates = AIC23_RATES,
 527                     .formats = AIC23_FORMATS,},
 528         .ops = &tlv320aic23_dai_ops,
 529 };
 530
 531 static int tlv320aic23_suspend(struct snd_soc_codec *codec)
 532 {
 533         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
 534
 535         return 0;
 536 }
 537
 538 static int tlv320aic23_resume(struct snd_soc_codec *codec)
 539 {
 540         snd_soc_cache_sync(codec);
 541         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 542
 543         return 0;
 544 }
 545
 546 static int tlv320aic23_probe(struct snd_soc_codec *codec)
 547 {
 548         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
 549         int ret;
 550
 551         printk(KERN_INFO "AIC23 Audio Codec %s\n", AIC23_VERSION);
 552
 553         ret = snd_soc_codec_set_cache_io(codec, 7, 9, aic23->control_type);
 554         if (ret < 0) {
 555                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 556                 return ret;
 557         }
 558
 559         /* Reset codec */
 560         snd_soc_write(codec, TLV320AIC23_RESET, 0);
 561
 562         /* Write the register default value to cache for reserved registers,
 563          * so the write to the these registers are suppressed by the cache
 564          * restore code when it skips writes of default registers.
 565          */
 566         snd_soc_cache_write(codec, 0x0A, 0);
 567         snd_soc_cache_write(codec, 0x0B, 0);
 568         snd_soc_cache_write(codec, 0x0C, 0);
 569         snd_soc_cache_write(codec, 0x0D, 0);
 570         snd_soc_cache_write(codec, 0x0E, 0);
 571
 572         /* power on device */
 573         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 574
 575         snd_soc_write(codec, TLV320AIC23_DIGT, TLV320AIC23_DEEMP_44K);
 576
 577         /* Unmute input */
 578         snd_soc_update_bits(codec, TLV320AIC23_LINVOL,
 579                             TLV320AIC23_LIM_MUTED, TLV320AIC23_LRS_ENABLED);
 580
 581         snd_soc_update_bits(codec, TLV320AIC23_RINVOL,
 582                             TLV320AIC23_LIM_MUTED, TLV320AIC23_LRS_ENABLED);
 583
 584         snd_soc_update_bits(codec, TLV320AIC23_ANLG,
 585                             TLV320AIC23_BYPASS_ON | TLV320AIC23_MICM_MUTED,
 586                             0);
 587
 588         /* Default output volume */
 589         snd_soc_write(codec, TLV320AIC23_LCHNVOL,
 590                       TLV320AIC23_DEFAULT_OUT_VOL & TLV320AIC23_OUT_VOL_MASK);
 591         snd_soc_write(codec, TLV320AIC23_RCHNVOL,
 592                       TLV320AIC23_DEFAULT_OUT_VOL & TLV320AIC23_OUT_VOL_MASK);
 593
 594         snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x1);
 595
 596         snd_soc_add_controls(codec, tlv320aic23_snd_controls,
 597                                 ARRAY_SIZE(tlv320aic23_snd_controls));
 598
 599         return 0;
 600 }
 601
 602 static int tlv320aic23_remove(struct snd_soc_codec *codec)
 603 {
 604         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
 605         return 0;
 606 }
 607
 608 static struct snd_soc_codec_driver soc_codec_dev_tlv320aic23 = {
 609         .reg_cache_size = ARRAY_SIZE(tlv320aic23_reg),
 610         .reg_word_size = sizeof(u16),
 611         .reg_cache_default = tlv320aic23_reg,
 612         .probe = tlv320aic23_probe,
 613         .remove = tlv320aic23_remove,
 614         .suspend = tlv320aic23_suspend,
 615         .resume = tlv320aic23_resume,
 616         .set_bias_level = tlv320aic23_set_bias_level,
 617         .dapm_widgets = tlv320aic23_dapm_widgets,
 618         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
 619         .dapm_routes = tlv320aic23_intercon,
 620         .num_dapm_routes = ARRAY_SIZE(tlv320aic23_intercon),
 621 };
 622
 623 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 624 /*
 625  * If the i2c layer weren't so broken, we could pass this kind of data
 626  * around
 627  */
 628 static int tlv320aic23_codec_probe(struct i2c_client *i2c,
 629                                    const struct i2c_device_id *i2c_id)
 630 {
 631         struct aic23 *aic23;
 632         int ret;
 633
 634         if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 635                 return -EINVAL;
 636
 637         aic23 = devm_kzalloc(&i2c->dev, sizeof(struct aic23), GFP_KERNEL);
 638         if (aic23 == NULL)
 639                 return -ENOMEM;
 640
 641         i2c_set_clientdata(i2c, aic23);
 642         aic23->control_type = SND_SOC_I2C;
 643
 644         ret =  snd_soc_register_codec(&i2c->dev,
 645                         &soc_codec_dev_tlv320aic23, &tlv320aic23_dai, 1);
 646         return ret;
 647 }
 648 static int __exit tlv320aic23_i2c_remove(struct i2c_client *i2c)
 649 {
 650         snd_soc_unregister_codec(&i2c->dev);
 651         return 0;
 652 }
 653
 654 static const struct i2c_device_id tlv320aic23_id[] = {
 655         {"tlv320aic23", 0},
 656         {}
 657 };
 658
 659 MODULE_DEVICE_TABLE(i2c, tlv320aic23_id);
 660
 661 static struct i2c_driver tlv320aic23_i2c_driver = {
 662         .driver = {
 663                    .name = "tlv320aic23-codec",
 664                    },
 665         .probe = tlv320aic23_codec_probe,
 666         .remove = __exit_p(tlv320aic23_i2c_remove),
 667         .id_table = tlv320aic23_id,
 668 };
 669
 670 #endif
 671
 672 static int __init tlv320aic23_modinit(void)
 673 {
 674         int ret;
 675 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 676         ret = i2c_add_driver(&tlv320aic23_i2c_driver);
 677         if (ret != 0) {
 678                 printk(KERN_ERR "Failed to register TLV320AIC23 I2C driver: %d\n",
 679                        ret);
 680         }
 681 #endif
 682         return ret;
 683 }
 684 module_init(tlv320aic23_modinit);
 685
 686 static void __exit tlv320aic23_exit(void)
 687 {
 688 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 689         i2c_del_driver(&tlv320aic23_i2c_driver);
 690 #endif
 691 }
 692 module_exit(tlv320aic23_exit);
 693
 694 MODULE_DESCRIPTION("ASoC TLV320AIC23 codec driver");
 695 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 696 MODULE_LICENSE("GPL");