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 <sound/core.h>
  29 #include <sound/pcm.h>
  30 #include <sound/pcm_params.h>
  31 #include <sound/soc.h>
  32 #include <sound/soc-dapm.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 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         struct snd_soc_codec codec;
 243         int mclk;
 244         int requested_adc;
 245         int requested_dac;
 246 };
 247
 248 /*
 249  * Common Crystals used
 250  * 11.2896 Mhz /128 = *88.2k  /192 = 58.8k
 251  * 12.0000 Mhz /125 = *96k    /136 = 88.235K
 252  * 12.2880 Mhz /128 = *96k    /192 = 64k
 253  * 16.9344 Mhz /128 = 132.3k /192 = *88.2k
 254  * 18.4320 Mhz /128 = 144k   /192 = *96k
 255  */
 256
 257 /*
 258  * Normal BOSR 0-256/2 = 128, 1-384/2 = 192
 259  * USB BOSR 0-250/2 = 125, 1-272/2 = 136
 260  */
 261 static const int bosr_usb_divisor_table[] = {
 262         128, 125, 192, 136
 263 };
 264 #define LOWER_GROUP ((1<<0) | (1<<1) | (1<<2) | (1<<3) | (1<<6) | (1<<7))
 265 #define UPPER_GROUP ((1<<8) | (1<<9) | (1<<10) | (1<<11)        | (1<<15))
 266 static const unsigned short sr_valid_mask[] = {
 267         LOWER_GROUP|UPPER_GROUP,        /* Normal, bosr - 0*/
 268         LOWER_GROUP,                    /* Usb, bosr - 0*/
 269         LOWER_GROUP|UPPER_GROUP,        /* Normal, bosr - 1*/
 270         UPPER_GROUP,                    /* Usb, bosr - 1*/
 271 };
 272 /*
 273  * Every divisor is a factor of 11*12
 274  */
 275 #define SR_MULT (11*12)
 276 #define A(x) (SR_MULT/x)
 277 static const unsigned char sr_adc_mult_table[] = {
 278         A(2), A(2), A(12), A(12),  0, 0, A(3), A(1),
 279         A(2), A(2), A(11), A(11),  0, 0, 0, A(1)
 280 };
 281 static const unsigned char sr_dac_mult_table[] = {
 282         A(2), A(12), A(2), A(12),  0, 0, A(3), A(1),
 283         A(2), A(11), A(2), A(11),  0, 0, 0, A(1)
 284 };
 285
 286 static unsigned get_score(int adc, int adc_l, int adc_h, int need_adc,
 287                 int dac, int dac_l, int dac_h, int need_dac)
 288 {
 289         if ((adc >= adc_l) && (adc <= adc_h) &&
 290                         (dac >= dac_l) && (dac <= dac_h)) {
 291                 int diff_adc = need_adc - adc;
 292                 int diff_dac = need_dac - dac;
 293                 return abs(diff_adc) + abs(diff_dac);
 294         }
 295         return UINT_MAX;
 296 }
 297
 298 static int find_rate(int mclk, u32 need_adc, u32 need_dac)
 299 {
 300         int i, j;
 301         int best_i = -1;
 302         int best_j = -1;
 303         int best_div = 0;
 304         unsigned best_score = UINT_MAX;
 305         int adc_l, adc_h, dac_l, dac_h;
 306
 307         need_adc *= SR_MULT;
 308         need_dac *= SR_MULT;
 309         /*
 310          * rates given are +/- 1/32
 311          */
 312         adc_l = need_adc - (need_adc >> 5);
 313         adc_h = need_adc + (need_adc >> 5);
 314         dac_l = need_dac - (need_dac >> 5);
 315         dac_h = need_dac + (need_dac >> 5);
 316         for (i = 0; i < ARRAY_SIZE(bosr_usb_divisor_table); i++) {
 317                 int base = mclk / bosr_usb_divisor_table[i];
 318                 int mask = sr_valid_mask[i];
 319                 for (j = 0; j < ARRAY_SIZE(sr_adc_mult_table);
 320                                 j++, mask >>= 1) {
 321                         int adc;
 322                         int dac;
 323                         int score;
 324                         if ((mask & 1) == 0)
 325                                 continue;
 326                         adc = base * sr_adc_mult_table[j];
 327                         dac = base * sr_dac_mult_table[j];
 328                         score = get_score(adc, adc_l, adc_h, need_adc,
 329                                         dac, dac_l, dac_h, need_dac);
 330                         if (best_score > score) {
 331                                 best_score = score;
 332                                 best_i = i;
 333                                 best_j = j;
 334                                 best_div = 0;
 335                         }
 336                         score = get_score((adc >> 1), adc_l, adc_h, need_adc,
 337                                         (dac >> 1), dac_l, dac_h, need_dac);
 338                         /* prefer to have a /2 */
 339                         if ((score != UINT_MAX) && (best_score >= score)) {
 340                                 best_score = score;
 341                                 best_i = i;
 342                                 best_j = j;
 343                                 best_div = 1;
 344                         }
 345                 }
 346         }
 347         return (best_j << 2) | best_i | (best_div << TLV320AIC23_CLKIN_SHIFT);
 348 }
 349
 350 #ifdef DEBUG
 351 static void get_current_sample_rates(struct snd_soc_codec *codec, int mclk,
 352                 u32 *sample_rate_adc, u32 *sample_rate_dac)
 353 {
 354         int src = tlv320aic23_read_reg_cache(codec, TLV320AIC23_SRATE);
 355         int sr = (src >> 2) & 0x0f;
 356         int val = (mclk / bosr_usb_divisor_table[src & 3]);
 357         int adc = (val * sr_adc_mult_table[sr]) / SR_MULT;
 358         int dac = (val * sr_dac_mult_table[sr]) / SR_MULT;
 359         if (src & TLV320AIC23_CLKIN_HALF) {
 360                 adc >>= 1;
 361                 dac >>= 1;
 362         }
 363         *sample_rate_adc = adc;
 364         *sample_rate_dac = dac;
 365 }
 366 #endif
 367
 368 static int set_sample_rate_control(struct snd_soc_codec *codec, int mclk,
 369                 u32 sample_rate_adc, u32 sample_rate_dac)
 370 {
 371         /* Search for the right sample rate */
 372         int data = find_rate(mclk, sample_rate_adc, sample_rate_dac);
 373         if (data < 0) {
 374                 printk(KERN_ERR "%s:Invalid rate %u,%u requested\n",
 375                                 __func__, sample_rate_adc, sample_rate_dac);
 376                 return -EINVAL;
 377         }
 378         tlv320aic23_write(codec, TLV320AIC23_SRATE, data);
 379 #ifdef DEBUG
 380         {
 381                 u32 adc, dac;
 382                 get_current_sample_rates(codec, mclk, &adc, &dac);
 383                 printk(KERN_DEBUG "actual samplerate = %u,%u reg=%x\n",
 384                         adc, dac, data);
 385         }
 386 #endif
 387         return 0;
 388 }
 389
 390 static int tlv320aic23_add_widgets(struct snd_soc_codec *codec)
 391 {
 392         snd_soc_dapm_new_controls(codec, tlv320aic23_dapm_widgets,
 393                                   ARRAY_SIZE(tlv320aic23_dapm_widgets));
 394
 395         /* set up audio path interconnects */
 396         snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
 397
 398         return 0;
 399 }
 400
 401 static int tlv320aic23_hw_params(struct snd_pcm_substream *substream,
 402                                  struct snd_pcm_hw_params *params,
 403                                  struct snd_soc_dai *dai)
 404 {
 405         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 406         struct snd_soc_device *socdev = rtd->socdev;
 407         struct snd_soc_codec *codec = socdev->card->codec;
 408         u16 iface_reg;
 409         int ret;
 410         struct aic23 *aic23 = container_of(codec, struct aic23, codec);
 411         u32 sample_rate_adc = aic23->requested_adc;
 412         u32 sample_rate_dac = aic23->requested_dac;
 413         u32 sample_rate = params_rate(params);
 414
 415         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 416                 aic23->requested_dac = sample_rate_dac = sample_rate;
 417                 if (!sample_rate_adc)
 418                         sample_rate_adc = sample_rate;
 419         } else {
 420                 aic23->requested_adc = sample_rate_adc = sample_rate;
 421                 if (!sample_rate_dac)
 422                         sample_rate_dac = sample_rate;
 423         }
 424         ret = set_sample_rate_control(codec, aic23->mclk, sample_rate_adc,
 425                         sample_rate_dac);
 426         if (ret < 0)
 427                 return ret;
 428
 429         iface_reg =
 430             tlv320aic23_read_reg_cache(codec,
 431                                        TLV320AIC23_DIGT_FMT) & ~(0x03 << 2);
 432         switch (params_format(params)) {
 433         case SNDRV_PCM_FORMAT_S16_LE:
 434                 break;
 435         case SNDRV_PCM_FORMAT_S20_3LE:
 436                 iface_reg |= (0x01 << 2);
 437                 break;
 438         case SNDRV_PCM_FORMAT_S24_LE:
 439                 iface_reg |= (0x02 << 2);
 440                 break;
 441         case SNDRV_PCM_FORMAT_S32_LE:
 442                 iface_reg |= (0x03 << 2);
 443                 break;
 444         }
 445         tlv320aic23_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
 446
 447         return 0;
 448 }
 449
 450 static int tlv320aic23_pcm_prepare(struct snd_pcm_substream *substream,
 451                                    struct snd_soc_dai *dai)
 452 {
 453         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 454         struct snd_soc_device *socdev = rtd->socdev;
 455         struct snd_soc_codec *codec = socdev->card->codec;
 456
 457         /* set active */
 458         tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0001);
 459
 460         return 0;
 461 }
 462
 463 static void tlv320aic23_shutdown(struct snd_pcm_substream *substream,
 464                                  struct snd_soc_dai *dai)
 465 {
 466         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 467         struct snd_soc_device *socdev = rtd->socdev;
 468         struct snd_soc_codec *codec = socdev->card->codec;
 469         struct aic23 *aic23 = container_of(codec, struct aic23, codec);
 470
 471         /* deactivate */
 472         if (!codec->active) {
 473                 udelay(50);
 474                 tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0);
 475         }
 476         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 477                 aic23->requested_dac = 0;
 478         else
 479                 aic23->requested_adc = 0;
 480 }
 481
 482 static int tlv320aic23_mute(struct snd_soc_dai *dai, int mute)
 483 {
 484         struct snd_soc_codec *codec = dai->codec;
 485         u16 reg;
 486
 487         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_DIGT);
 488         if (mute)
 489                 reg |= TLV320AIC23_DACM_MUTE;
 490
 491         else
 492                 reg &= ~TLV320AIC23_DACM_MUTE;
 493
 494         tlv320aic23_write(codec, TLV320AIC23_DIGT, reg);
 495
 496         return 0;
 497 }
 498
 499 static int tlv320aic23_set_dai_fmt(struct snd_soc_dai *codec_dai,
 500                                    unsigned int fmt)
 501 {
 502         struct snd_soc_codec *codec = codec_dai->codec;
 503         u16 iface_reg;
 504
 505         iface_reg =
 506             tlv320aic23_read_reg_cache(codec, TLV320AIC23_DIGT_FMT) & (~0x03);
 507
 508         /* set master/slave audio interface */
 509         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 510         case SND_SOC_DAIFMT_CBM_CFM:
 511                 iface_reg |= TLV320AIC23_MS_MASTER;
 512                 break;
 513         case SND_SOC_DAIFMT_CBS_CFS:
 514                 break;
 515         default:
 516                 return -EINVAL;
 517
 518         }
 519
 520         /* interface format */
 521         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 522         case SND_SOC_DAIFMT_I2S:
 523                 iface_reg |= TLV320AIC23_FOR_I2S;
 524                 break;
 525         case SND_SOC_DAIFMT_DSP_A:
 526                 iface_reg |= TLV320AIC23_LRP_ON;
 527         case SND_SOC_DAIFMT_DSP_B:
 528                 iface_reg |= TLV320AIC23_FOR_DSP;
 529                 break;
 530         case SND_SOC_DAIFMT_RIGHT_J:
 531                 break;
 532         case SND_SOC_DAIFMT_LEFT_J:
 533                 iface_reg |= TLV320AIC23_FOR_LJUST;
 534                 break;
 535         default:
 536                 return -EINVAL;
 537
 538         }
 539
 540         tlv320aic23_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
 541
 542         return 0;
 543 }
 544
 545 static int tlv320aic23_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 546                                       int clk_id, unsigned int freq, int dir)
 547 {
 548         struct snd_soc_codec *codec = codec_dai->codec;
 549         struct aic23 *aic23 = container_of(codec, struct aic23, codec);
 550         aic23->mclk = freq;
 551         return 0;
 552 }
 553
 554 static int tlv320aic23_set_bias_level(struct snd_soc_codec *codec,
 555                                       enum snd_soc_bias_level level)
 556 {
 557         u16 reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_PWR) & 0xff7f;
 558
 559         switch (level) {
 560         case SND_SOC_BIAS_ON:
 561                 /* vref/mid, osc on, dac unmute */
 562                 tlv320aic23_write(codec, TLV320AIC23_PWR, reg);
 563                 break;
 564         case SND_SOC_BIAS_PREPARE:
 565                 break;
 566         case SND_SOC_BIAS_STANDBY:
 567                 /* everything off except vref/vmid, */
 568                 tlv320aic23_write(codec, TLV320AIC23_PWR, reg | 0x0040);
 569                 break;
 570         case SND_SOC_BIAS_OFF:
 571                 /* everything off, dac mute, inactive */
 572                 tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0);
 573                 tlv320aic23_write(codec, TLV320AIC23_PWR, 0xffff);
 574                 break;
 575         }
 576         codec->bias_level = level;
 577         return 0;
 578 }
 579
 580 #define AIC23_RATES     SNDRV_PCM_RATE_8000_96000
 581 #define AIC23_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 582                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)
 583
 584 static struct snd_soc_dai_ops tlv320aic23_dai_ops = {
 585         .prepare        = tlv320aic23_pcm_prepare,
 586         .hw_params      = tlv320aic23_hw_params,
 587         .shutdown       = tlv320aic23_shutdown,
 588         .digital_mute   = tlv320aic23_mute,
 589         .set_fmt        = tlv320aic23_set_dai_fmt,
 590         .set_sysclk     = tlv320aic23_set_dai_sysclk,
 591 };
 592
 593 struct snd_soc_dai tlv320aic23_dai = {
 594         .name = "tlv320aic23",
 595         .playback = {
 596                      .stream_name = "Playback",
 597                      .channels_min = 2,
 598                      .channels_max = 2,
 599                      .rates = AIC23_RATES,
 600                      .formats = AIC23_FORMATS,},
 601         .capture = {
 602                     .stream_name = "Capture",
 603                     .channels_min = 2,
 604                     .channels_max = 2,
 605                     .rates = AIC23_RATES,
 606                     .formats = AIC23_FORMATS,},
 607         .ops = &tlv320aic23_dai_ops,
 608 };
 609 EXPORT_SYMBOL_GPL(tlv320aic23_dai);
 610
 611 static int tlv320aic23_suspend(struct platform_device *pdev,
 612                                pm_message_t state)
 613 {
 614         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 615         struct snd_soc_codec *codec = socdev->card->codec;
 616
 617         tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0);
 618         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
 619
 620         return 0;
 621 }
 622
 623 static int tlv320aic23_resume(struct platform_device *pdev)
 624 {
 625         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 626         struct snd_soc_codec *codec = socdev->card->codec;
 627         u16 reg;
 628
 629         /* Sync reg_cache with the hardware */
 630         for (reg = 0; reg <= TLV320AIC23_ACTIVE; reg++) {
 631                 u16 val = tlv320aic23_read_reg_cache(codec, reg);
 632                 tlv320aic23_write(codec, reg, val);
 633         }
 634
 635         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 636         tlv320aic23_set_bias_level(codec, codec->suspend_bias_level);
 637
 638         return 0;
 639 }
 640
 641 /*
 642  * initialise the AIC23 driver
 643  * register the mixer and dsp interfaces with the kernel
 644  */
 645 static int tlv320aic23_init(struct snd_soc_device *socdev)
 646 {
 647         struct snd_soc_codec *codec = socdev->card->codec;
 648         int ret = 0;
 649         u16 reg;
 650
 651         codec->name = "tlv320aic23";
 652         codec->owner = THIS_MODULE;
 653         codec->read = tlv320aic23_read_reg_cache;
 654         codec->write = tlv320aic23_write;
 655         codec->set_bias_level = tlv320aic23_set_bias_level;
 656         codec->dai = &tlv320aic23_dai;
 657         codec->num_dai = 1;
 658         codec->reg_cache_size = ARRAY_SIZE(tlv320aic23_reg);
 659         codec->reg_cache =
 660             kmemdup(tlv320aic23_reg, sizeof(tlv320aic23_reg), GFP_KERNEL);
 661         if (codec->reg_cache == NULL)
 662                 return -ENOMEM;
 663
 664         /* Reset codec */
 665         tlv320aic23_write(codec, TLV320AIC23_RESET, 0);
 666
 667         /* register pcms */
 668         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 669         if (ret < 0) {
 670                 printk(KERN_ERR "tlv320aic23: failed to create pcms\n");
 671                 goto pcm_err;
 672         }
 673
 674         /* power on device */
 675         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 676
 677         tlv320aic23_write(codec, TLV320AIC23_DIGT, TLV320AIC23_DEEMP_44K);
 678
 679         /* Unmute input */
 680         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_LINVOL);
 681         tlv320aic23_write(codec, TLV320AIC23_LINVOL,
 682                           (reg & (~TLV320AIC23_LIM_MUTED)) |
 683                           (TLV320AIC23_LRS_ENABLED));
 684
 685         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_RINVOL);
 686         tlv320aic23_write(codec, TLV320AIC23_RINVOL,
 687                           (reg & (~TLV320AIC23_LIM_MUTED)) |
 688                           TLV320AIC23_LRS_ENABLED);
 689
 690         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_ANLG);
 691         tlv320aic23_write(codec, TLV320AIC23_ANLG,
 692                          (reg) & (~TLV320AIC23_BYPASS_ON) &
 693                          (~TLV320AIC23_MICM_MUTED));
 694
 695         /* Default output volume */
 696         tlv320aic23_write(codec, TLV320AIC23_LCHNVOL,
 697                           TLV320AIC23_DEFAULT_OUT_VOL &
 698                           TLV320AIC23_OUT_VOL_MASK);
 699         tlv320aic23_write(codec, TLV320AIC23_RCHNVOL,
 700                           TLV320AIC23_DEFAULT_OUT_VOL &
 701                           TLV320AIC23_OUT_VOL_MASK);
 702
 703         tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x1);
 704
 705         snd_soc_add_controls(codec, tlv320aic23_snd_controls,
 706                                 ARRAY_SIZE(tlv320aic23_snd_controls));
 707         tlv320aic23_add_widgets(codec);
 708
 709         return ret;
 710
 711 pcm_err:
 712         kfree(codec->reg_cache);
 713         return ret;
 714 }
 715 static struct snd_soc_device *tlv320aic23_socdev;
 716
 717 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 718 /*
 719  * If the i2c layer weren't so broken, we could pass this kind of data
 720  * around
 721  */
 722 static int tlv320aic23_codec_probe(struct i2c_client *i2c,
 723                                    const struct i2c_device_id *i2c_id)
 724 {
 725         struct snd_soc_device *socdev = tlv320aic23_socdev;
 726         struct snd_soc_codec *codec = socdev->card->codec;
 727         int ret;
 728
 729         if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 730                 return -EINVAL;
 731
 732         i2c_set_clientdata(i2c, codec);
 733         codec->control_data = i2c;
 734
 735         ret = tlv320aic23_init(socdev);
 736         if (ret < 0) {
 737                 printk(KERN_ERR "tlv320aic23: failed to initialise AIC23\n");
 738                 goto err;
 739         }
 740         return ret;
 741
 742 err:
 743         kfree(codec);
 744         kfree(i2c);
 745         return ret;
 746 }
 747 static int __exit tlv320aic23_i2c_remove(struct i2c_client *i2c)
 748 {
 749         put_device(&i2c->dev);
 750         return 0;
 751 }
 752
 753 static const struct i2c_device_id tlv320aic23_id[] = {
 754         {"tlv320aic23", 0},
 755         {}
 756 };
 757
 758 MODULE_DEVICE_TABLE(i2c, tlv320aic23_id);
 759
 760 static struct i2c_driver tlv320aic23_i2c_driver = {
 761         .driver = {
 762                    .name = "tlv320aic23",
 763                    },
 764         .probe = tlv320aic23_codec_probe,
 765         .remove = __exit_p(tlv320aic23_i2c_remove),
 766         .id_table = tlv320aic23_id,
 767 };
 768
 769 #endif
 770
 771 static int tlv320aic23_probe(struct platform_device *pdev)
 772 {
 773         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 774         struct snd_soc_codec *codec;
 775         struct aic23 *aic23;
 776         int ret = 0;
 777
 778         printk(KERN_INFO "AIC23 Audio Codec %s\n", AIC23_VERSION);
 779
 780         aic23 = kzalloc(sizeof(struct aic23), GFP_KERNEL);
 781         if (aic23 == NULL)
 782                 return -ENOMEM;
 783         codec = &aic23->codec;
 784         socdev->card->codec = codec;
 785         mutex_init(&codec->mutex);
 786         INIT_LIST_HEAD(&codec->dapm_widgets);
 787         INIT_LIST_HEAD(&codec->dapm_paths);
 788
 789         tlv320aic23_socdev = socdev;
 790 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 791         codec->hw_write = (hw_write_t) i2c_master_send;
 792         codec->hw_read = NULL;
 793         ret = i2c_add_driver(&tlv320aic23_i2c_driver);
 794         if (ret != 0)
 795                 printk(KERN_ERR "can't add i2c driver");
 796 #endif
 797         return ret;
 798 }
 799
 800 static int tlv320aic23_remove(struct platform_device *pdev)
 801 {
 802         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 803         struct snd_soc_codec *codec = socdev->card->codec;
 804         struct aic23 *aic23 = container_of(codec, struct aic23, codec);
 805
 806         if (codec->control_data)
 807                 tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
 808
 809         snd_soc_free_pcms(socdev);
 810         snd_soc_dapm_free(socdev);
 811 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 812         i2c_del_driver(&tlv320aic23_i2c_driver);
 813 #endif
 814         kfree(codec->reg_cache);
 815         kfree(aic23);
 816
 817         return 0;
 818 }
 819 struct snd_soc_codec_device soc_codec_dev_tlv320aic23 = {
 820         .probe = tlv320aic23_probe,
 821         .remove = tlv320aic23_remove,
 822         .suspend = tlv320aic23_suspend,
 823         .resume = tlv320aic23_resume,
 824 };
 825 EXPORT_SYMBOL_GPL(soc_codec_dev_tlv320aic23);
 826
 827 static int __init tlv320aic23_modinit(void)
 828 {
 829         return snd_soc_register_dai(&tlv320aic23_dai);
 830 }
 831 module_init(tlv320aic23_modinit);
 832
 833 static void __exit tlv320aic23_exit(void)
 834 {
 835         snd_soc_unregister_dai(&tlv320aic23_dai);
 836 }
 837 module_exit(tlv320aic23_exit);
 838
 839 MODULE_DESCRIPTION("ASoC TLV320AIC23 codec driver");
 840 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 841 MODULE_LICENSE("GPL");