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/platform_device.h>
  28 #include <linux/slab.h>
  29 #include <sound/core.h>
  30 #include <sound/pcm.h>
  31 #include <sound/pcm_params.h>
  32 #include <sound/soc.h>
  33 #include <sound/tlv.h>
  34 #include <sound/initval.h>
  35
  36 #include "tlv320aic23.h"
  37
  38 #define AIC23_VERSION "0.1"
  39
  40 /*
  41  * AIC23 register cache
  42  */
  43 static const u16 tlv320aic23_reg[] = {
  44         0x0097, 0x0097, 0x00F9, 0x00F9, /* 0 */
  45         0x001A, 0x0004, 0x0007, 0x0001, /* 4 */
  46         0x0020, 0x0000, 0x0000, 0x0000, /* 8 */
  47         0x0000, 0x0000, 0x0000, 0x0000, /* 12 */
  48 };
  49
  50 /*
  51  * read tlv320aic23 register cache
  52  */
  53 static inline unsigned int tlv320aic23_read_reg_cache(struct snd_soc_codec
  54                                                       *codec, unsigned int reg)
  55 {
  56         u16 *cache = codec->reg_cache;
  57         if (reg >= ARRAY_SIZE(tlv320aic23_reg))
  58                 return -1;
  59         return cache[reg];
  60 }
  61
  62 /*
  63  * write tlv320aic23 register cache
  64  */
  65 static inline void tlv320aic23_write_reg_cache(struct snd_soc_codec *codec,
  66                                                u8 reg, u16 value)
  67 {
  68         u16 *cache = codec->reg_cache;
  69         if (reg >= ARRAY_SIZE(tlv320aic23_reg))
  70                 return;
  71         cache[reg] = value;
  72 }
  73
  74 /*
  75  * write to the tlv320aic23 register space
  76  */
  77 static int tlv320aic23_write(struct snd_soc_codec *codec, unsigned int reg,
  78                              unsigned int value)
  79 {
  80
  81         u8 data[2];
  82
  83         /* TLV320AIC23 has 7 bit address and 9 bits of data
  84          * so we need to switch one data bit into reg and rest
  85          * of data into val
  86          */
  87
  88         if (reg > 9 && reg != 15) {
  89                 printk(KERN_WARNING "%s Invalid register R%u\n", __func__, reg);
  90                 return -1;
  91         }
  92
  93         data[0] = (reg << 1) | (value >> 8 & 0x01);
  94         data[1] = value & 0xff;
  95
  96         tlv320aic23_write_reg_cache(codec, reg, value);
  97
  98         if (codec->hw_write(codec->control_data, data, 2) == 2)
  99                 return 0;
 100
 101         printk(KERN_ERR "%s cannot write %03x to register R%u\n", __func__,
 102                value, reg);
 103
 104         return -EIO;
 105 }
 106
 107 static const char *rec_src_text[] = { "Line", "Mic" };
 108 static const char *deemph_text[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 109
 110 static const struct soc_enum rec_src_enum =
 111         SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);
 112
 113 static const struct snd_kcontrol_new tlv320aic23_rec_src_mux_controls =
 114 SOC_DAPM_ENUM("Input Select", rec_src_enum);
 115
 116 static const struct soc_enum tlv320aic23_rec_src =
 117         SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);
 118 static const struct soc_enum tlv320aic23_deemph =
 119         SOC_ENUM_SINGLE(TLV320AIC23_DIGT, 1, 4, deemph_text);
 120
 121 static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -12100, 100, 0);
 122 static const DECLARE_TLV_DB_SCALE(input_gain_tlv, -1725, 75, 0);
 123 static const DECLARE_TLV_DB_SCALE(sidetone_vol_tlv, -1800, 300, 0);
 124
 125 static int snd_soc_tlv320aic23_put_volsw(struct snd_kcontrol *kcontrol,
 126         struct snd_ctl_elem_value *ucontrol)
 127 {
 128         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 129         u16 val, reg;
 130
 131         val = (ucontrol->value.integer.value[0] & 0x07);
 132
 133         /* linear conversion to userspace
 134         * 000   =       -6db
 135         * 001   =       -9db
 136         * 010   =       -12db
 137         * 011   =       -18db (Min)
 138         * 100   =       0db (Max)
 139         */
 140         val = (val >= 4) ? 4  : (3 - val);
 141
 142         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_ANLG) & (~0x1C0);
 143         tlv320aic23_write(codec, TLV320AIC23_ANLG, reg | (val << 6));
 144
 145         return 0;
 146 }
 147
 148 static int snd_soc_tlv320aic23_get_volsw(struct snd_kcontrol *kcontrol,
 149         struct snd_ctl_elem_value *ucontrol)
 150 {
 151         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 152         u16 val;
 153
 154         val = tlv320aic23_read_reg_cache(codec, TLV320AIC23_ANLG) & (0x1C0);
 155         val = val >> 6;
 156         val = (val >= 4) ? 4  : (3 -  val);
 157         ucontrol->value.integer.value[0] = val;
 158         return 0;
 159
 160 }
 161
 162 #define SOC_TLV320AIC23_SINGLE_TLV(xname, reg, shift, max, invert, tlv_array) \
 163 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 164         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
 165                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
 166         .tlv.p = (tlv_array), \
 167         .info = snd_soc_info_volsw, .get = snd_soc_tlv320aic23_get_volsw,\
 168         .put = snd_soc_tlv320aic23_put_volsw, \
 169         .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
 170
 171 static const struct snd_kcontrol_new tlv320aic23_snd_controls[] = {
 172         SOC_DOUBLE_R_TLV("Digital Playback Volume", TLV320AIC23_LCHNVOL,
 173                          TLV320AIC23_RCHNVOL, 0, 127, 0, out_gain_tlv),
 174         SOC_SINGLE("Digital Playback Switch", TLV320AIC23_DIGT, 3, 1, 1),
 175         SOC_DOUBLE_R("Line Input Switch", TLV320AIC23_LINVOL,
 176                      TLV320AIC23_RINVOL, 7, 1, 0),
 177         SOC_DOUBLE_R_TLV("Line Input Volume", TLV320AIC23_LINVOL,
 178                          TLV320AIC23_RINVOL, 0, 31, 0, input_gain_tlv),
 179         SOC_SINGLE("Mic Input Switch", TLV320AIC23_ANLG, 1, 1, 1),
 180         SOC_SINGLE("Mic Booster Switch", TLV320AIC23_ANLG, 0, 1, 0),
 181         SOC_TLV320AIC23_SINGLE_TLV("Sidetone Volume", TLV320AIC23_ANLG,
 182                                   6, 4, 0, sidetone_vol_tlv),
 183         SOC_ENUM("Playback De-emphasis", tlv320aic23_deemph),
 184 };
 185
 186 /* PGA Mixer controls for Line and Mic switch */
 187 static const struct snd_kcontrol_new tlv320aic23_output_mixer_controls[] = {
 188         SOC_DAPM_SINGLE("Line Bypass Switch", TLV320AIC23_ANLG, 3, 1, 0),
 189         SOC_DAPM_SINGLE("Mic Sidetone Switch", TLV320AIC23_ANLG, 5, 1, 0),
 190         SOC_DAPM_SINGLE("Playback Switch", TLV320AIC23_ANLG, 4, 1, 0),
 191 };
 192
 193 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
 194         SND_SOC_DAPM_DAC("DAC", "Playback", TLV320AIC23_PWR, 3, 1),
 195         SND_SOC_DAPM_ADC("ADC", "Capture", TLV320AIC23_PWR, 2, 1),
 196         SND_SOC_DAPM_MUX("Capture Source", SND_SOC_NOPM, 0, 0,
 197                          &tlv320aic23_rec_src_mux_controls),
 198         SND_SOC_DAPM_MIXER("Output Mixer", TLV320AIC23_PWR, 4, 1,
 199                            &tlv320aic23_output_mixer_controls[0],
 200                            ARRAY_SIZE(tlv320aic23_output_mixer_controls)),
 201         SND_SOC_DAPM_PGA("Line Input", TLV320AIC23_PWR, 0, 1, NULL, 0),
 202         SND_SOC_DAPM_PGA("Mic Input", TLV320AIC23_PWR, 1, 1, NULL, 0),
 203
 204         SND_SOC_DAPM_OUTPUT("LHPOUT"),
 205         SND_SOC_DAPM_OUTPUT("RHPOUT"),
 206         SND_SOC_DAPM_OUTPUT("LOUT"),
 207         SND_SOC_DAPM_OUTPUT("ROUT"),
 208
 209         SND_SOC_DAPM_INPUT("LLINEIN"),
 210         SND_SOC_DAPM_INPUT("RLINEIN"),
 211
 212         SND_SOC_DAPM_INPUT("MICIN"),
 213 };
 214
 215 static const struct snd_soc_dapm_route tlv320aic23_intercon[] = {
 216         /* Output Mixer */
 217         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 218         {"Output Mixer", "Playback Switch", "DAC"},
 219         {"Output Mixer", "Mic Sidetone Switch", "Mic Input"},
 220
 221         /* Outputs */
 222         {"RHPOUT", NULL, "Output Mixer"},
 223         {"LHPOUT", NULL, "Output Mixer"},
 224         {"LOUT", NULL, "Output Mixer"},
 225         {"ROUT", NULL, "Output Mixer"},
 226
 227         /* Inputs */
 228         {"Line Input", "NULL", "LLINEIN"},
 229         {"Line Input", "NULL", "RLINEIN"},
 230
 231         {"Mic Input", "NULL", "MICIN"},
 232
 233         /* input mux */
 234         {"Capture Source", "Line", "Line Input"},
 235         {"Capture Source", "Mic", "Mic Input"},
 236         {"ADC", NULL, "Capture Source"},
 237
 238 };
 239
 240 /* AIC23 driver data */
 241 struct aic23 {
 242         enum snd_soc_control_type control_type;
 243         void *control_data;
 244         int mclk;
 245         int requested_adc;
 246         int requested_dac;
 247 };
 248
 249 /*
 250  * Common Crystals used
 251  * 11.2896 Mhz /128 = *88.2k  /192 = 58.8k
 252  * 12.0000 Mhz /125 = *96k    /136 = 88.235K
 253  * 12.2880 Mhz /128 = *96k    /192 = 64k
 254  * 16.9344 Mhz /128 = 132.3k /192 = *88.2k
 255  * 18.4320 Mhz /128 = 144k   /192 = *96k
 256  */
 257
 258 /*
 259  * Normal BOSR 0-256/2 = 128, 1-384/2 = 192
 260  * USB BOSR 0-250/2 = 125, 1-272/2 = 136
 261  */
 262 static const int bosr_usb_divisor_table[] = {
 263         128, 125, 192, 136
 264 };
 265 #define LOWER_GROUP ((1<<0) | (1<<1) | (1<<2) | (1<<3) | (1<<6) | (1<<7))
 266 #define UPPER_GROUP ((1<<8) | (1<<9) | (1<<10) | (1<<11)        | (1<<15))
 267 static const unsigned short sr_valid_mask[] = {
 268         LOWER_GROUP|UPPER_GROUP,        /* Normal, bosr - 0*/
 269         LOWER_GROUP,                    /* Usb, bosr - 0*/
 270         LOWER_GROUP|UPPER_GROUP,        /* Normal, bosr - 1*/
 271         UPPER_GROUP,                    /* Usb, bosr - 1*/
 272 };
 273 /*
 274  * Every divisor is a factor of 11*12
 275  */
 276 #define SR_MULT (11*12)
 277 #define A(x) (SR_MULT/x)
 278 static const unsigned char sr_adc_mult_table[] = {
 279         A(2), A(2), A(12), A(12),  0, 0, A(3), A(1),
 280         A(2), A(2), A(11), A(11),  0, 0, 0, A(1)
 281 };
 282 static const unsigned char sr_dac_mult_table[] = {
 283         A(2), A(12), A(2), A(12),  0, 0, A(3), A(1),
 284         A(2), A(11), A(2), A(11),  0, 0, 0, A(1)
 285 };
 286
 287 static unsigned get_score(int adc, int adc_l, int adc_h, int need_adc,
 288                 int dac, int dac_l, int dac_h, int need_dac)
 289 {
 290         if ((adc >= adc_l) && (adc <= adc_h) &&
 291                         (dac >= dac_l) && (dac <= dac_h)) {
 292                 int diff_adc = need_adc - adc;
 293                 int diff_dac = need_dac - dac;
 294                 return abs(diff_adc) + abs(diff_dac);
 295         }
 296         return UINT_MAX;
 297 }
 298
 299 static int find_rate(int mclk, u32 need_adc, u32 need_dac)
 300 {
 301         int i, j;
 302         int best_i = -1;
 303         int best_j = -1;
 304         int best_div = 0;
 305         unsigned best_score = UINT_MAX;
 306         int adc_l, adc_h, dac_l, dac_h;
 307
 308         need_adc *= SR_MULT;
 309         need_dac *= SR_MULT;
 310         /*
 311          * rates given are +/- 1/32
 312          */
 313         adc_l = need_adc - (need_adc >> 5);
 314         adc_h = need_adc + (need_adc >> 5);
 315         dac_l = need_dac - (need_dac >> 5);
 316         dac_h = need_dac + (need_dac >> 5);
 317         for (i = 0; i < ARRAY_SIZE(bosr_usb_divisor_table); i++) {
 318                 int base = mclk / bosr_usb_divisor_table[i];
 319                 int mask = sr_valid_mask[i];
 320                 for (j = 0; j < ARRAY_SIZE(sr_adc_mult_table);
 321                                 j++, mask >>= 1) {
 322                         int adc;
 323                         int dac;
 324                         int score;
 325                         if ((mask & 1) == 0)
 326                                 continue;
 327                         adc = base * sr_adc_mult_table[j];
 328                         dac = base * sr_dac_mult_table[j];
 329                         score = get_score(adc, adc_l, adc_h, need_adc,
 330                                         dac, dac_l, dac_h, need_dac);
 331                         if (best_score > score) {
 332                                 best_score = score;
 333                                 best_i = i;
 334                                 best_j = j;
 335                                 best_div = 0;
 336                         }
 337                         score = get_score((adc >> 1), adc_l, adc_h, need_adc,
 338                                         (dac >> 1), dac_l, dac_h, need_dac);
 339                         /* prefer to have a /2 */
 340                         if ((score != UINT_MAX) && (best_score >= score)) {
 341                                 best_score = score;
 342                                 best_i = i;
 343                                 best_j = j;
 344                                 best_div = 1;
 345                         }
 346                 }
 347         }
 348         return (best_j << 2) | best_i | (best_div << TLV320AIC23_CLKIN_SHIFT);
 349 }
 350
 351 #ifdef DEBUG
 352 static void get_current_sample_rates(struct snd_soc_codec *codec, int mclk,
 353                 u32 *sample_rate_adc, u32 *sample_rate_dac)
 354 {
 355         int src = tlv320aic23_read_reg_cache(codec, TLV320AIC23_SRATE);
 356         int sr = (src >> 2) & 0x0f;
 357         int val = (mclk / bosr_usb_divisor_table[src & 3]);
 358         int adc = (val * sr_adc_mult_table[sr]) / SR_MULT;
 359         int dac = (val * sr_dac_mult_table[sr]) / SR_MULT;
 360         if (src & TLV320AIC23_CLKIN_HALF) {
 361                 adc >>= 1;
 362                 dac >>= 1;
 363         }
 364         *sample_rate_adc = adc;
 365         *sample_rate_dac = dac;
 366 }
 367 #endif
 368
 369 static int set_sample_rate_control(struct snd_soc_codec *codec, int mclk,
 370                 u32 sample_rate_adc, u32 sample_rate_dac)
 371 {
 372         /* Search for the right sample rate */
 373         int data = find_rate(mclk, sample_rate_adc, sample_rate_dac);
 374         if (data < 0) {
 375                 printk(KERN_ERR "%s:Invalid rate %u,%u requested\n",
 376                                 __func__, sample_rate_adc, sample_rate_dac);
 377                 return -EINVAL;
 378         }
 379         tlv320aic23_write(codec, TLV320AIC23_SRATE, data);
 380 #ifdef DEBUG
 381         {
 382                 u32 adc, dac;
 383                 get_current_sample_rates(codec, mclk, &adc, &dac);
 384                 printk(KERN_DEBUG "actual samplerate = %u,%u reg=%x\n",
 385                         adc, dac, data);
 386         }
 387 #endif
 388         return 0;
 389 }
 390
 391 static int tlv320aic23_hw_params(struct snd_pcm_substream *substream,
 392                                  struct snd_pcm_hw_params *params,
 393                                  struct snd_soc_dai *dai)
 394 {
 395         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 396         struct snd_soc_codec *codec = rtd->codec;
 397         u16 iface_reg;
 398         int ret;
 399         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
 400         u32 sample_rate_adc = aic23->requested_adc;
 401         u32 sample_rate_dac = aic23->requested_dac;
 402         u32 sample_rate = params_rate(params);
 403
 404         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 405                 aic23->requested_dac = sample_rate_dac = sample_rate;
 406                 if (!sample_rate_adc)
 407                         sample_rate_adc = sample_rate;
 408         } else {
 409                 aic23->requested_adc = sample_rate_adc = sample_rate;
 410                 if (!sample_rate_dac)
 411                         sample_rate_dac = sample_rate;
 412         }
 413         ret = set_sample_rate_control(codec, aic23->mclk, sample_rate_adc,
 414                         sample_rate_dac);
 415         if (ret < 0)
 416                 return ret;
 417
 418         iface_reg =
 419             tlv320aic23_read_reg_cache(codec,
 420                                        TLV320AIC23_DIGT_FMT) & ~(0x03 << 2);
 421         switch (params_format(params)) {
 422         case SNDRV_PCM_FORMAT_S16_LE:
 423                 break;
 424         case SNDRV_PCM_FORMAT_S20_3LE:
 425                 iface_reg |= (0x01 << 2);
 426                 break;
 427         case SNDRV_PCM_FORMAT_S24_LE:
 428                 iface_reg |= (0x02 << 2);
 429                 break;
 430         case SNDRV_PCM_FORMAT_S32_LE:
 431                 iface_reg |= (0x03 << 2);
 432                 break;
 433         }
 434         tlv320aic23_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
 435
 436         return 0;
 437 }
 438
 439 static int tlv320aic23_pcm_prepare(struct snd_pcm_substream *substream,
 440                                    struct snd_soc_dai *dai)
 441 {
 442         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 443         struct snd_soc_codec *codec = rtd->codec;
 444
 445         /* set active */
 446         tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0001);
 447
 448         return 0;
 449 }
 450
 451 static void tlv320aic23_shutdown(struct snd_pcm_substream *substream,
 452                                  struct snd_soc_dai *dai)
 453 {
 454         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 455         struct snd_soc_codec *codec = rtd->codec;
 456         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
 457
 458         /* deactivate */
 459         if (!codec->active) {
 460                 udelay(50);
 461                 tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0);
 462         }
 463         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 464                 aic23->requested_dac = 0;
 465         else
 466                 aic23->requested_adc = 0;
 467 }
 468
 469 static int tlv320aic23_mute(struct snd_soc_dai *dai, int mute)
 470 {
 471         struct snd_soc_codec *codec = dai->codec;
 472         u16 reg;
 473
 474         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_DIGT);
 475         if (mute)
 476                 reg |= TLV320AIC23_DACM_MUTE;
 477
 478         else
 479                 reg &= ~TLV320AIC23_DACM_MUTE;
 480
 481         tlv320aic23_write(codec, TLV320AIC23_DIGT, reg);
 482
 483         return 0;
 484 }
 485
 486 static int tlv320aic23_set_dai_fmt(struct snd_soc_dai *codec_dai,
 487                                    unsigned int fmt)
 488 {
 489         struct snd_soc_codec *codec = codec_dai->codec;
 490         u16 iface_reg;
 491
 492         iface_reg =
 493             tlv320aic23_read_reg_cache(codec, TLV320AIC23_DIGT_FMT) & (~0x03);
 494
 495         /* set master/slave audio interface */
 496         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 497         case SND_SOC_DAIFMT_CBM_CFM:
 498                 iface_reg |= TLV320AIC23_MS_MASTER;
 499                 break;
 500         case SND_SOC_DAIFMT_CBS_CFS:
 501                 break;
 502         default:
 503                 return -EINVAL;
 504
 505         }
 506
 507         /* interface format */
 508         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 509         case SND_SOC_DAIFMT_I2S:
 510                 iface_reg |= TLV320AIC23_FOR_I2S;
 511                 break;
 512         case SND_SOC_DAIFMT_DSP_A:
 513                 iface_reg |= TLV320AIC23_LRP_ON;
 514         case SND_SOC_DAIFMT_DSP_B:
 515                 iface_reg |= TLV320AIC23_FOR_DSP;
 516                 break;
 517         case SND_SOC_DAIFMT_RIGHT_J:
 518                 break;
 519         case SND_SOC_DAIFMT_LEFT_J:
 520                 iface_reg |= TLV320AIC23_FOR_LJUST;
 521                 break;
 522         default:
 523                 return -EINVAL;
 524
 525         }
 526
 527         tlv320aic23_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
 528
 529         return 0;
 530 }
 531
 532 static int tlv320aic23_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 533                                       int clk_id, unsigned int freq, int dir)
 534 {
 535         struct aic23 *aic23 = snd_soc_dai_get_drvdata(codec_dai);
 536         aic23->mclk = freq;
 537         return 0;
 538 }
 539
 540 static int tlv320aic23_set_bias_level(struct snd_soc_codec *codec,
 541                                       enum snd_soc_bias_level level)
 542 {
 543         u16 reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_PWR) & 0xff7f;
 544
 545         switch (level) {
 546         case SND_SOC_BIAS_ON:
 547                 /* vref/mid, osc on, dac unmute */
 548                 reg &= ~(TLV320AIC23_DEVICE_PWR_OFF | TLV320AIC23_OSC_OFF | \
 549                         TLV320AIC23_DAC_OFF);
 550                 tlv320aic23_write(codec, TLV320AIC23_PWR, reg);
 551                 break;
 552         case SND_SOC_BIAS_PREPARE:
 553                 break;
 554         case SND_SOC_BIAS_STANDBY:
 555                 /* everything off except vref/vmid, */
 556                 tlv320aic23_write(codec, TLV320AIC23_PWR, reg | \
 557                         TLV320AIC23_CLK_OFF);
 558                 break;
 559         case SND_SOC_BIAS_OFF:
 560                 /* everything off, dac mute, inactive */
 561                 tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0);
 562                 tlv320aic23_write(codec, TLV320AIC23_PWR, 0xffff);
 563                 break;
 564         }
 565         codec->dapm.bias_level = level;
 566         return 0;
 567 }
 568
 569 #define AIC23_RATES     SNDRV_PCM_RATE_8000_96000
 570 #define AIC23_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 571                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)
 572
 573 static struct snd_soc_dai_ops tlv320aic23_dai_ops = {
 574         .prepare        = tlv320aic23_pcm_prepare,
 575         .hw_params      = tlv320aic23_hw_params,
 576         .shutdown       = tlv320aic23_shutdown,
 577         .digital_mute   = tlv320aic23_mute,
 578         .set_fmt        = tlv320aic23_set_dai_fmt,
 579         .set_sysclk     = tlv320aic23_set_dai_sysclk,
 580 };
 581
 582 static struct snd_soc_dai_driver tlv320aic23_dai = {
 583         .name = "tlv320aic23-hifi",
 584         .playback = {
 585                      .stream_name = "Playback",
 586                      .channels_min = 2,
 587                      .channels_max = 2,
 588                      .rates = AIC23_RATES,
 589                      .formats = AIC23_FORMATS,},
 590         .capture = {
 591                     .stream_name = "Capture",
 592                     .channels_min = 2,
 593                     .channels_max = 2,
 594                     .rates = AIC23_RATES,
 595                     .formats = AIC23_FORMATS,},
 596         .ops = &tlv320aic23_dai_ops,
 597 };
 598
 599 static int tlv320aic23_suspend(struct snd_soc_codec *codec,
 600                                pm_message_t state)
 601 {
 602         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
 603
 604         return 0;
 605 }
 606
 607 static int tlv320aic23_resume(struct snd_soc_codec *codec)
 608 {
 609         u16 reg;
 610
 611         /* Sync reg_cache with the hardware */
 612         for (reg = 0; reg <= TLV320AIC23_ACTIVE; reg++) {
 613                 u16 val = tlv320aic23_read_reg_cache(codec, reg);
 614                 tlv320aic23_write(codec, reg, val);
 615         }
 616         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 617
 618         return 0;
 619 }
 620
 621 static int tlv320aic23_probe(struct snd_soc_codec *codec)
 622 {
 623         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
 624         int reg;
 625
 626         printk(KERN_INFO "AIC23 Audio Codec %s\n", AIC23_VERSION);
 627         codec->control_data = aic23->control_data;
 628         codec->hw_write = (hw_write_t)i2c_master_send;
 629         codec->hw_read = NULL;
 630
 631         /* Reset codec */
 632         tlv320aic23_write(codec, TLV320AIC23_RESET, 0);
 633
 634         /* power on device */
 635         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 636
 637         tlv320aic23_write(codec, TLV320AIC23_DIGT, TLV320AIC23_DEEMP_44K);
 638
 639         /* Unmute input */
 640         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_LINVOL);
 641         tlv320aic23_write(codec, TLV320AIC23_LINVOL,
 642                           (reg & (~TLV320AIC23_LIM_MUTED)) |
 643                           (TLV320AIC23_LRS_ENABLED));
 644
 645         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_RINVOL);
 646         tlv320aic23_write(codec, TLV320AIC23_RINVOL,
 647                           (reg & (~TLV320AIC23_LIM_MUTED)) |
 648                           TLV320AIC23_LRS_ENABLED);
 649
 650         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_ANLG);
 651         tlv320aic23_write(codec, TLV320AIC23_ANLG,
 652                          (reg) & (~TLV320AIC23_BYPASS_ON) &
 653                          (~TLV320AIC23_MICM_MUTED));
 654
 655         /* Default output volume */
 656         tlv320aic23_write(codec, TLV320AIC23_LCHNVOL,
 657                           TLV320AIC23_DEFAULT_OUT_VOL &
 658                           TLV320AIC23_OUT_VOL_MASK);
 659         tlv320aic23_write(codec, TLV320AIC23_RCHNVOL,
 660                           TLV320AIC23_DEFAULT_OUT_VOL &
 661                           TLV320AIC23_OUT_VOL_MASK);
 662
 663         tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x1);
 664
 665         snd_soc_add_controls(codec, tlv320aic23_snd_controls,
 666                                 ARRAY_SIZE(tlv320aic23_snd_controls));
 667
 668         return 0;
 669 }
 670
 671 static int tlv320aic23_remove(struct snd_soc_codec *codec)
 672 {
 673         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
 674         return 0;
 675 }
 676
 677 static struct snd_soc_codec_driver soc_codec_dev_tlv320aic23 = {
 678         .reg_cache_size = ARRAY_SIZE(tlv320aic23_reg),
 679         .reg_word_size = sizeof(u16),
 680         .reg_cache_default = tlv320aic23_reg,
 681         .probe = tlv320aic23_probe,
 682         .remove = tlv320aic23_remove,
 683         .suspend = tlv320aic23_suspend,
 684         .resume = tlv320aic23_resume,
 685         .read = tlv320aic23_read_reg_cache,
 686         .write = tlv320aic23_write,
 687         .set_bias_level = tlv320aic23_set_bias_level,
 688         .dapm_widgets = tlv320aic23_dapm_widgets,
 689         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
 690         .dapm_routes = tlv320aic23_intercon,
 691         .num_dapm_routes = ARRAY_SIZE(tlv320aic23_intercon),
 692 };
 693
 694 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 695 /*
 696  * If the i2c layer weren't so broken, we could pass this kind of data
 697  * around
 698  */
 699 static int tlv320aic23_codec_probe(struct i2c_client *i2c,
 700                                    const struct i2c_device_id *i2c_id)
 701 {
 702         struct aic23 *aic23;
 703         int ret;
 704
 705         if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 706                 return -EINVAL;
 707
 708         aic23 = kzalloc(sizeof(struct aic23), GFP_KERNEL);
 709         if (aic23 == NULL)
 710                 return -ENOMEM;
 711
 712         i2c_set_clientdata(i2c, aic23);
 713         aic23->control_data = i2c;
 714         aic23->control_type = SND_SOC_I2C;
 715
 716         ret =  snd_soc_register_codec(&i2c->dev,
 717                         &soc_codec_dev_tlv320aic23, &tlv320aic23_dai, 1);
 718         if (ret < 0)
 719                 kfree(aic23);
 720         return ret;
 721 }
 722 static int __exit tlv320aic23_i2c_remove(struct i2c_client *i2c)
 723 {
 724         snd_soc_unregister_codec(&i2c->dev);
 725         kfree(i2c_get_clientdata(i2c));
 726         return 0;
 727 }
 728
 729 static const struct i2c_device_id tlv320aic23_id[] = {
 730         {"tlv320aic23", 0},
 731         {}
 732 };
 733
 734 MODULE_DEVICE_TABLE(i2c, tlv320aic23_id);
 735
 736 static struct i2c_driver tlv320aic23_i2c_driver = {
 737         .driver = {
 738                    .name = "tlv320aic23-codec",
 739                    },
 740         .probe = tlv320aic23_codec_probe,
 741         .remove = __exit_p(tlv320aic23_i2c_remove),
 742         .id_table = tlv320aic23_id,
 743 };
 744
 745 #endif
 746
 747 static int __init tlv320aic23_modinit(void)
 748 {
 749         int ret;
 750 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 751         ret = i2c_add_driver(&tlv320aic23_i2c_driver);
 752         if (ret != 0) {
 753                 printk(KERN_ERR "Failed to register TLV320AIC23 I2C driver: %d\n",
 754                        ret);
 755         }
 756 #endif
 757         return ret;
 758 }
 759 module_init(tlv320aic23_modinit);
 760
 761 static void __exit tlv320aic23_exit(void)
 762 {
 763 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 764         i2c_del_driver(&tlv320aic23_i2c_driver);
 765 #endif
 766 }
 767 module_exit(tlv320aic23_exit);
 768
 769 MODULE_DESCRIPTION("ASoC TLV320AIC23 codec driver");
 770 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 771 MODULE_LICENSE("GPL");