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 struct tlv320aic23_srate_reg_info {
  41         u32 sample_rate;
  42         u8 control;             /* SR3, SR2, SR1, SR0 and BOSR */
  43         u8 divider;             /* if 0 CLKIN = MCLK, if 1 CLKIN = MCLK/2 */
  44 };
  45
  46 /*
  47  * AIC23 register cache
  48  */
  49 static const u16 tlv320aic23_reg[] = {
  50         0x0097, 0x0097, 0x00F9, 0x00F9, /* 0 */
  51         0x001A, 0x0004, 0x0007, 0x0001, /* 4 */
  52         0x0020, 0x0000, 0x0000, 0x0000, /* 8 */
  53         0x0000, 0x0000, 0x0000, 0x0000, /* 12 */
  54 };
  55
  56 /*
  57  * read tlv320aic23 register cache
  58  */
  59 static inline unsigned int tlv320aic23_read_reg_cache(struct snd_soc_codec
  60                                                       *codec, unsigned int reg)
  61 {
  62         u16 *cache = codec->reg_cache;
  63         if (reg >= ARRAY_SIZE(tlv320aic23_reg))
  64                 return -1;
  65         return cache[reg];
  66 }
  67
  68 /*
  69  * write tlv320aic23 register cache
  70  */
  71 static inline void tlv320aic23_write_reg_cache(struct snd_soc_codec *codec,
  72                                                u8 reg, u16 value)
  73 {
  74         u16 *cache = codec->reg_cache;
  75         if (reg >= ARRAY_SIZE(tlv320aic23_reg))
  76                 return;
  77         cache[reg] = value;
  78 }
  79
  80 /*
  81  * write to the tlv320aic23 register space
  82  */
  83 static int tlv320aic23_write(struct snd_soc_codec *codec, unsigned int reg,
  84                              unsigned int value)
  85 {
  86
  87         u8 data;
  88
  89         /* TLV320AIC23 has 7 bit address and 9 bits of data
  90          * so we need to switch one data bit into reg and rest
  91          * of data into val
  92          */
  93
  94         if ((reg < 0 || reg > 9) && (reg != 15)) {
  95                 printk(KERN_WARNING "%s Invalid register R%d\n", __func__, reg);
  96                 return -1;
  97         }
  98
  99         data = (reg << 1) | (value >> 8 & 0x01);
 100
 101         tlv320aic23_write_reg_cache(codec, reg, value);
 102
 103         if (codec->hw_write(codec->control_data, data,
 104                             (value & 0xff)) == 0)
 105                 return 0;
 106
 107         printk(KERN_ERR "%s cannot write %03x to register R%d\n", __func__,
 108                value, reg);
 109
 110         return -EIO;
 111 }
 112
 113 static const char *rec_src_text[] = { "Line", "Mic" };
 114 static const char *deemph_text[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 115
 116 static const struct soc_enum rec_src_enum =
 117         SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);
 118
 119 static const struct snd_kcontrol_new tlv320aic23_rec_src_mux_controls =
 120 SOC_DAPM_ENUM("Input Select", rec_src_enum);
 121
 122 static const struct soc_enum tlv320aic23_rec_src =
 123         SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);
 124 static const struct soc_enum tlv320aic23_deemph =
 125         SOC_ENUM_SINGLE(TLV320AIC23_DIGT, 1, 4, deemph_text);
 126
 127 static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -12100, 100, 0);
 128 static const DECLARE_TLV_DB_SCALE(input_gain_tlv, -1725, 75, 0);
 129 static const DECLARE_TLV_DB_SCALE(sidetone_vol_tlv, -1800, 300, 0);
 130
 131 static int snd_soc_tlv320aic23_put_volsw(struct snd_kcontrol *kcontrol,
 132         struct snd_ctl_elem_value *ucontrol)
 133 {
 134         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 135         u16 val, reg;
 136
 137         val = (ucontrol->value.integer.value[0] & 0x07);
 138
 139         /* linear conversion to userspace
 140         * 000   =       -6db
 141         * 001   =       -9db
 142         * 010   =       -12db
 143         * 011   =       -18db (Min)
 144         * 100   =       0db (Max)
 145         */
 146         val = (val >= 4) ? 4  : (3 - val);
 147
 148         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_ANLG) & (~0x1C0);
 149         tlv320aic23_write(codec, TLV320AIC23_ANLG, reg | (val << 6));
 150
 151         return 0;
 152 }
 153
 154 static int snd_soc_tlv320aic23_get_volsw(struct snd_kcontrol *kcontrol,
 155         struct snd_ctl_elem_value *ucontrol)
 156 {
 157         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 158         u16 val;
 159
 160         val = tlv320aic23_read_reg_cache(codec, TLV320AIC23_ANLG) & (0x1C0);
 161         val = val >> 6;
 162         val = (val >= 4) ? 4  : (3 -  val);
 163         ucontrol->value.integer.value[0] = val;
 164         return 0;
 165
 166 }
 167
 168 #define SOC_TLV320AIC23_SINGLE_TLV(xname, reg, shift, max, invert, tlv_array) \
 169 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 170         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
 171                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
 172         .tlv.p = (tlv_array), \
 173         .info = snd_soc_info_volsw, .get = snd_soc_tlv320aic23_get_volsw,\
 174         .put = snd_soc_tlv320aic23_put_volsw, \
 175         .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
 176
 177 static const struct snd_kcontrol_new tlv320aic23_snd_controls[] = {
 178         SOC_DOUBLE_R_TLV("Digital Playback Volume", TLV320AIC23_LCHNVOL,
 179                          TLV320AIC23_RCHNVOL, 0, 127, 0, out_gain_tlv),
 180         SOC_SINGLE("Digital Playback Switch", TLV320AIC23_DIGT, 3, 1, 1),
 181         SOC_DOUBLE_R("Line Input Switch", TLV320AIC23_LINVOL,
 182                      TLV320AIC23_RINVOL, 7, 1, 0),
 183         SOC_DOUBLE_R_TLV("Line Input Volume", TLV320AIC23_LINVOL,
 184                          TLV320AIC23_RINVOL, 0, 31, 0, input_gain_tlv),
 185         SOC_SINGLE("Mic Input Switch", TLV320AIC23_ANLG, 1, 1, 1),
 186         SOC_SINGLE("Mic Booster Switch", TLV320AIC23_ANLG, 0, 1, 0),
 187         SOC_TLV320AIC23_SINGLE_TLV("Sidetone Volume", TLV320AIC23_ANLG,
 188                                   6, 4, 0, sidetone_vol_tlv),
 189         SOC_ENUM("Playback De-emphasis", tlv320aic23_deemph),
 190 };
 191
 192 /* add non dapm controls */
 193 static int tlv320aic23_add_controls(struct snd_soc_codec *codec)
 194 {
 195
 196         int err, i;
 197
 198         for (i = 0; i < ARRAY_SIZE(tlv320aic23_snd_controls); i++) {
 199                 err = snd_ctl_add(codec->card,
 200                                   snd_soc_cnew(&tlv320aic23_snd_controls[i],
 201                                                codec, NULL));
 202                 if (err < 0)
 203                         return err;
 204         }
 205
 206         return 0;
 207
 208 }
 209
 210 /* PGA Mixer controls for Line and Mic switch */
 211 static const struct snd_kcontrol_new tlv320aic23_output_mixer_controls[] = {
 212         SOC_DAPM_SINGLE("Line Bypass Switch", TLV320AIC23_ANLG, 3, 1, 0),
 213         SOC_DAPM_SINGLE("Mic Sidetone Switch", TLV320AIC23_ANLG, 5, 1, 0),
 214         SOC_DAPM_SINGLE("Playback Switch", TLV320AIC23_ANLG, 4, 1, 0),
 215 };
 216
 217 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
 218         SND_SOC_DAPM_DAC("DAC", "Playback", TLV320AIC23_PWR, 3, 1),
 219         SND_SOC_DAPM_ADC("ADC", "Capture", TLV320AIC23_PWR, 2, 1),
 220         SND_SOC_DAPM_MUX("Capture Source", SND_SOC_NOPM, 0, 0,
 221                          &tlv320aic23_rec_src_mux_controls),
 222         SND_SOC_DAPM_MIXER("Output Mixer", TLV320AIC23_PWR, 4, 1,
 223                            &tlv320aic23_output_mixer_controls[0],
 224                            ARRAY_SIZE(tlv320aic23_output_mixer_controls)),
 225         SND_SOC_DAPM_PGA("Line Input", TLV320AIC23_PWR, 0, 1, NULL, 0),
 226         SND_SOC_DAPM_PGA("Mic Input", TLV320AIC23_PWR, 1, 1, NULL, 0),
 227
 228         SND_SOC_DAPM_OUTPUT("LHPOUT"),
 229         SND_SOC_DAPM_OUTPUT("RHPOUT"),
 230         SND_SOC_DAPM_OUTPUT("LOUT"),
 231         SND_SOC_DAPM_OUTPUT("ROUT"),
 232
 233         SND_SOC_DAPM_INPUT("LLINEIN"),
 234         SND_SOC_DAPM_INPUT("RLINEIN"),
 235
 236         SND_SOC_DAPM_INPUT("MICIN"),
 237 };
 238
 239 static const struct snd_soc_dapm_route intercon[] = {
 240         /* Output Mixer */
 241         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 242         {"Output Mixer", "Playback Switch", "DAC"},
 243         {"Output Mixer", "Mic Sidetone Switch", "Mic Input"},
 244
 245         /* Outputs */
 246         {"RHPOUT", NULL, "Output Mixer"},
 247         {"LHPOUT", NULL, "Output Mixer"},
 248         {"LOUT", NULL, "Output Mixer"},
 249         {"ROUT", NULL, "Output Mixer"},
 250
 251         /* Inputs */
 252         {"Line Input", "NULL", "LLINEIN"},
 253         {"Line Input", "NULL", "RLINEIN"},
 254
 255         {"Mic Input", "NULL", "MICIN"},
 256
 257         /* input mux */
 258         {"Capture Source", "Line", "Line Input"},
 259         {"Capture Source", "Mic", "Mic Input"},
 260         {"ADC", NULL, "Capture Source"},
 261
 262 };
 263
 264 /* tlv320aic23 related */
 265 static const struct tlv320aic23_srate_reg_info srate_reg_info[] = {
 266         {4000, 0x06, 1},        /*  4000 */
 267         {8000, 0x06, 0},        /*  8000 */
 268         {16000, 0x0C, 1},       /* 16000 */
 269         {22050, 0x11, 1},       /* 22050 */
 270         {24000, 0x00, 1},       /* 24000 */
 271         {32000, 0x0C, 0},       /* 32000 */
 272         {44100, 0x11, 0},       /* 44100 */
 273         {48000, 0x00, 0},       /* 48000 */
 274         {88200, 0x1F, 0},       /* 88200 */
 275         {96000, 0x0E, 0},       /* 96000 */
 276 };
 277
 278 static int tlv320aic23_add_widgets(struct snd_soc_codec *codec)
 279 {
 280         snd_soc_dapm_new_controls(codec, tlv320aic23_dapm_widgets,
 281                                   ARRAY_SIZE(tlv320aic23_dapm_widgets));
 282
 283         /* set up audio path interconnects */
 284         snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
 285
 286         snd_soc_dapm_new_widgets(codec);
 287         return 0;
 288 }
 289
 290 static int tlv320aic23_hw_params(struct snd_pcm_substream *substream,
 291                                  struct snd_pcm_hw_params *params)
 292 {
 293         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 294         struct snd_soc_device *socdev = rtd->socdev;
 295         struct snd_soc_codec *codec = socdev->codec;
 296         u16 iface_reg, data;
 297         u8 count = 0;
 298
 299         iface_reg =
 300             tlv320aic23_read_reg_cache(codec,
 301                                        TLV320AIC23_DIGT_FMT) & ~(0x03 << 2);
 302
 303         /* Search for the right sample rate */
 304         /* Verify what happens if the rate is not supported
 305          * now it goes to 96Khz */
 306         while ((srate_reg_info[count].sample_rate != params_rate(params)) &&
 307                (count < ARRAY_SIZE(srate_reg_info))) {
 308                 count++;
 309         }
 310
 311         data =  (srate_reg_info[count].divider << TLV320AIC23_CLKIN_SHIFT) |
 312                 (srate_reg_info[count]. control << TLV320AIC23_BOSR_SHIFT) |
 313                 TLV320AIC23_USB_CLK_ON;
 314
 315         tlv320aic23_write(codec, TLV320AIC23_SRATE, data);
 316
 317         switch (params_format(params)) {
 318         case SNDRV_PCM_FORMAT_S16_LE:
 319                 break;
 320         case SNDRV_PCM_FORMAT_S20_3LE:
 321                 iface_reg |= (0x01 << 2);
 322                 break;
 323         case SNDRV_PCM_FORMAT_S24_LE:
 324                 iface_reg |= (0x02 << 2);
 325                 break;
 326         case SNDRV_PCM_FORMAT_S32_LE:
 327                 iface_reg |= (0x03 << 2);
 328                 break;
 329         }
 330         tlv320aic23_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
 331
 332         return 0;
 333 }
 334
 335 static int tlv320aic23_pcm_prepare(struct snd_pcm_substream *substream)
 336 {
 337         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 338         struct snd_soc_device *socdev = rtd->socdev;
 339         struct snd_soc_codec *codec = socdev->codec;
 340
 341         /* set active */
 342         tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0001);
 343
 344         return 0;
 345 }
 346
 347 static void tlv320aic23_shutdown(struct snd_pcm_substream *substream)
 348 {
 349         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 350         struct snd_soc_device *socdev = rtd->socdev;
 351         struct snd_soc_codec *codec = socdev->codec;
 352
 353         /* deactivate */
 354         if (!codec->active) {
 355                 udelay(50);
 356                 tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0);
 357         }
 358 }
 359
 360 static int tlv320aic23_mute(struct snd_soc_dai *dai, int mute)
 361 {
 362         struct snd_soc_codec *codec = dai->codec;
 363         u16 reg;
 364
 365         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_DIGT);
 366         if (mute)
 367                 reg |= TLV320AIC23_DACM_MUTE;
 368
 369         else
 370                 reg &= ~TLV320AIC23_DACM_MUTE;
 371
 372         tlv320aic23_write(codec, TLV320AIC23_DIGT, reg);
 373
 374         return 0;
 375 }
 376
 377 static int tlv320aic23_set_dai_fmt(struct snd_soc_dai *codec_dai,
 378                                    unsigned int fmt)
 379 {
 380         struct snd_soc_codec *codec = codec_dai->codec;
 381         u16 iface_reg;
 382
 383         iface_reg =
 384             tlv320aic23_read_reg_cache(codec, TLV320AIC23_DIGT_FMT) & (~0x03);
 385
 386         /* set master/slave audio interface */
 387         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 388         case SND_SOC_DAIFMT_CBM_CFM:
 389                 iface_reg |= TLV320AIC23_MS_MASTER;
 390                 break;
 391         case SND_SOC_DAIFMT_CBS_CFS:
 392                 break;
 393         default:
 394                 return -EINVAL;
 395
 396         }
 397
 398         /* interface format */
 399         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 400         case SND_SOC_DAIFMT_I2S:
 401                 iface_reg |= TLV320AIC23_FOR_I2S;
 402                 break;
 403         case SND_SOC_DAIFMT_DSP_A:
 404                 iface_reg |= TLV320AIC23_FOR_DSP;
 405                 break;
 406         case SND_SOC_DAIFMT_RIGHT_J:
 407                 break;
 408         case SND_SOC_DAIFMT_LEFT_J:
 409                 iface_reg |= TLV320AIC23_FOR_LJUST;
 410                 break;
 411         default:
 412                 return -EINVAL;
 413
 414         }
 415
 416         tlv320aic23_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
 417
 418         return 0;
 419 }
 420
 421 static int tlv320aic23_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 422                                       int clk_id, unsigned int freq, int dir)
 423 {
 424         struct snd_soc_codec *codec = codec_dai->codec;
 425
 426         switch (freq) {
 427         case 12000000:
 428                 return 0;
 429         }
 430         return -EINVAL;
 431 }
 432
 433 static int tlv320aic23_set_bias_level(struct snd_soc_codec *codec,
 434                                       enum snd_soc_bias_level level)
 435 {
 436         u16 reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_PWR) & 0xff7f;
 437
 438         switch (level) {
 439         case SND_SOC_BIAS_ON:
 440                 /* vref/mid, osc on, dac unmute */
 441                 tlv320aic23_write(codec, TLV320AIC23_PWR, reg);
 442                 break;
 443         case SND_SOC_BIAS_PREPARE:
 444                 break;
 445         case SND_SOC_BIAS_STANDBY:
 446                 /* everything off except vref/vmid, */
 447                 tlv320aic23_write(codec, TLV320AIC23_PWR, reg | 0x0040);
 448                 break;
 449         case SND_SOC_BIAS_OFF:
 450                 /* everything off, dac mute, inactive */
 451                 tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0);
 452                 tlv320aic23_write(codec, TLV320AIC23_PWR, 0xffff);
 453                 break;
 454         }
 455         codec->bias_level = level;
 456         return 0;
 457 }
 458
 459 #define AIC23_RATES     SNDRV_PCM_RATE_8000_96000
 460 #define AIC23_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 461                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)
 462
 463 struct snd_soc_dai tlv320aic23_dai = {
 464         .name = "tlv320aic23",
 465         .playback = {
 466                      .stream_name = "Playback",
 467                      .channels_min = 2,
 468                      .channels_max = 2,
 469                      .rates = AIC23_RATES,
 470                      .formats = AIC23_FORMATS,},
 471         .capture = {
 472                     .stream_name = "Capture",
 473                     .channels_min = 2,
 474                     .channels_max = 2,
 475                     .rates = AIC23_RATES,
 476                     .formats = AIC23_FORMATS,},
 477         .ops = {
 478                 .prepare = tlv320aic23_pcm_prepare,
 479                 .hw_params = tlv320aic23_hw_params,
 480                 .shutdown = tlv320aic23_shutdown,
 481                 },
 482         .dai_ops = {
 483                     .digital_mute = tlv320aic23_mute,
 484                     .set_fmt = tlv320aic23_set_dai_fmt,
 485                     .set_sysclk = tlv320aic23_set_dai_sysclk,
 486                     }
 487 };
 488 EXPORT_SYMBOL_GPL(tlv320aic23_dai);
 489
 490 static int tlv320aic23_suspend(struct platform_device *pdev,
 491                                pm_message_t state)
 492 {
 493         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 494         struct snd_soc_codec *codec = socdev->codec;
 495
 496         tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0);
 497         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
 498
 499         return 0;
 500 }
 501
 502 static int tlv320aic23_resume(struct platform_device *pdev)
 503 {
 504         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 505         struct snd_soc_codec *codec = socdev->codec;
 506         int i;
 507         u16 reg;
 508
 509         /* Sync reg_cache with the hardware */
 510         for (reg = 0; reg < ARRAY_SIZE(tlv320aic23_reg); i++) {
 511                 u16 val = tlv320aic23_read_reg_cache(codec, reg);
 512                 tlv320aic23_write(codec, reg, val);
 513         }
 514
 515         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 516         tlv320aic23_set_bias_level(codec, codec->suspend_bias_level);
 517
 518         return 0;
 519 }
 520
 521 /*
 522  * initialise the AIC23 driver
 523  * register the mixer and dsp interfaces with the kernel
 524  */
 525 static int tlv320aic23_init(struct snd_soc_device *socdev)
 526 {
 527         struct snd_soc_codec *codec = socdev->codec;
 528         int ret = 0;
 529         u16 reg;
 530
 531         codec->name = "tlv320aic23";
 532         codec->owner = THIS_MODULE;
 533         codec->read = tlv320aic23_read_reg_cache;
 534         codec->write = tlv320aic23_write;
 535         codec->set_bias_level = tlv320aic23_set_bias_level;
 536         codec->dai = &tlv320aic23_dai;
 537         codec->num_dai = 1;
 538         codec->reg_cache_size = ARRAY_SIZE(tlv320aic23_reg);
 539         codec->reg_cache =
 540             kmemdup(tlv320aic23_reg, sizeof(tlv320aic23_reg), GFP_KERNEL);
 541         if (codec->reg_cache == NULL)
 542                 return -ENOMEM;
 543
 544         /* Reset codec */
 545         tlv320aic23_write(codec, TLV320AIC23_RESET, 0);
 546
 547         /* register pcms */
 548         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 549         if (ret < 0) {
 550                 printk(KERN_ERR "tlv320aic23: failed to create pcms\n");
 551                 goto pcm_err;
 552         }
 553
 554         /* power on device */
 555         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 556
 557         tlv320aic23_write(codec, TLV320AIC23_DIGT, TLV320AIC23_DEEMP_44K);
 558
 559         /* Unmute input */
 560         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_LINVOL);
 561         tlv320aic23_write(codec, TLV320AIC23_LINVOL,
 562                           (reg & (~TLV320AIC23_LIM_MUTED)) |
 563                           (TLV320AIC23_LRS_ENABLED));
 564
 565         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_RINVOL);
 566         tlv320aic23_write(codec, TLV320AIC23_RINVOL,
 567                           (reg & (~TLV320AIC23_LIM_MUTED)) |
 568                           TLV320AIC23_LRS_ENABLED);
 569
 570         reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_ANLG);
 571         tlv320aic23_write(codec, TLV320AIC23_ANLG,
 572                          (reg) & (~TLV320AIC23_BYPASS_ON) &
 573                          (~TLV320AIC23_MICM_MUTED));
 574
 575         /* Default output volume */
 576         tlv320aic23_write(codec, TLV320AIC23_LCHNVOL,
 577                           TLV320AIC23_DEFAULT_OUT_VOL &
 578                           TLV320AIC23_OUT_VOL_MASK);
 579         tlv320aic23_write(codec, TLV320AIC23_RCHNVOL,
 580                           TLV320AIC23_DEFAULT_OUT_VOL &
 581                           TLV320AIC23_OUT_VOL_MASK);
 582
 583         tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x1);
 584
 585         tlv320aic23_add_controls(codec);
 586         tlv320aic23_add_widgets(codec);
 587         ret = snd_soc_register_card(socdev);
 588         if (ret < 0) {
 589                 printk(KERN_ERR "tlv320aic23: failed to register card\n");
 590                 goto card_err;
 591         }
 592
 593         return ret;
 594
 595 card_err:
 596         snd_soc_free_pcms(socdev);
 597         snd_soc_dapm_free(socdev);
 598 pcm_err:
 599         kfree(codec->reg_cache);
 600         return ret;
 601 }
 602 static struct snd_soc_device *tlv320aic23_socdev;
 603
 604 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 605 /*
 606  * If the i2c layer weren't so broken, we could pass this kind of data
 607  * around
 608  */
 609 static int tlv320aic23_codec_probe(struct i2c_client *i2c,
 610                                    const struct i2c_device_id *i2c_id)
 611 {
 612         struct snd_soc_device *socdev = tlv320aic23_socdev;
 613         struct snd_soc_codec *codec = socdev->codec;
 614         int ret;
 615
 616         if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 617                 return -EINVAL;
 618
 619         i2c_set_clientdata(i2c, codec);
 620         codec->control_data = i2c;
 621
 622         ret = tlv320aic23_init(socdev);
 623         if (ret < 0) {
 624                 printk(KERN_ERR "tlv320aic23: failed to initialise AIC23\n");
 625                 goto err;
 626         }
 627         return ret;
 628
 629 err:
 630         kfree(codec);
 631         kfree(i2c);
 632         return ret;
 633 }
 634 static int __exit tlv320aic23_i2c_remove(struct i2c_client *i2c)
 635 {
 636         put_device(&i2c->dev);
 637         return 0;
 638 }
 639
 640 static const struct i2c_device_id tlv320aic23_id[] = {
 641         {"tlv320aic23", 0},
 642         {}
 643 };
 644
 645 MODULE_DEVICE_TABLE(i2c, tlv320aic23_id);
 646
 647 static struct i2c_driver tlv320aic23_i2c_driver = {
 648         .driver = {
 649                    .name = "tlv320aic23",
 650                    },
 651         .probe = tlv320aic23_codec_probe,
 652         .remove = __exit_p(tlv320aic23_i2c_remove),
 653         .id_table = tlv320aic23_id,
 654 };
 655
 656 #endif
 657
 658 static int tlv320aic23_probe(struct platform_device *pdev)
 659 {
 660         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 661         struct snd_soc_codec *codec;
 662         int ret = 0;
 663
 664         printk(KERN_INFO "AIC23 Audio Codec %s\n", AIC23_VERSION);
 665
 666         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 667         if (codec == NULL)
 668                 return -ENOMEM;
 669
 670         socdev->codec = codec;
 671         mutex_init(&codec->mutex);
 672         INIT_LIST_HEAD(&codec->dapm_widgets);
 673         INIT_LIST_HEAD(&codec->dapm_paths);
 674
 675         tlv320aic23_socdev = socdev;
 676 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 677         codec->hw_write = (hw_write_t) i2c_smbus_write_byte_data;
 678         codec->hw_read = NULL;
 679         ret = i2c_add_driver(&tlv320aic23_i2c_driver);
 680         if (ret != 0)
 681                 printk(KERN_ERR "can't add i2c driver");
 682 #endif
 683         return ret;
 684 }
 685
 686 static int tlv320aic23_remove(struct platform_device *pdev)
 687 {
 688         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 689         struct snd_soc_codec *codec = socdev->codec;
 690
 691         if (codec->control_data)
 692                 tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
 693
 694         snd_soc_free_pcms(socdev);
 695         snd_soc_dapm_free(socdev);
 696 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 697         i2c_del_driver(&tlv320aic23_i2c_driver);
 698 #endif
 699         kfree(codec->reg_cache);
 700         kfree(codec);
 701
 702         return 0;
 703 }
 704 struct snd_soc_codec_device soc_codec_dev_tlv320aic23 = {
 705         .probe = tlv320aic23_probe,
 706         .remove = tlv320aic23_remove,
 707         .suspend = tlv320aic23_suspend,
 708         .resume = tlv320aic23_resume,
 709 };
 710 EXPORT_SYMBOL_GPL(soc_codec_dev_tlv320aic23);
 711
 712 MODULE_DESCRIPTION("ASoC TLV320AIC23 codec driver");
 713 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 714 MODULE_LICENSE("GPL");