sound/soc/codecs/tlv320dac33.c

   1 /*
   2  * ALSA SoC Texas Instruments TLV320DAC33 codec driver
   3  *
   4  * Author:      Peter Ujfalusi <peter.ujfalusi@nokia.com>
   5  *
   6  * Copyright:   (C) 2009 Nokia Corporation
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/init.h>
  27 #include <linux/delay.h>
  28 #include <linux/pm.h>
  29 #include <linux/i2c.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/gpio.h>
  33 #include <linux/regulator/consumer.h>
  34 #include <sound/core.h>
  35 #include <sound/pcm.h>
  36 #include <sound/pcm_params.h>
  37 #include <sound/soc.h>
  38 #include <sound/soc-dapm.h>
  39 #include <sound/initval.h>
  40 #include <sound/tlv.h>
  41
  42 #include <sound/tlv320dac33-plat.h>
  43 #include "tlv320dac33.h"
  44
  45 #define DAC33_BUFFER_SIZE_BYTES         24576   /* bytes, 12288 16 bit words,
  46                                                  * 6144 stereo */
  47 #define DAC33_BUFFER_SIZE_SAMPLES       6144
  48
  49 #define NSAMPLE_MAX             5700
  50
  51 #define LATENCY_TIME_MS         20
  52
  53 static struct snd_soc_codec *tlv320dac33_codec;
  54
  55 enum dac33_state {
  56         DAC33_IDLE = 0,
  57         DAC33_PREFILL,
  58         DAC33_PLAYBACK,
  59         DAC33_FLUSH,
  60 };
  61
  62 enum dac33_fifo_modes {
  63         DAC33_FIFO_BYPASS = 0,
  64         DAC33_FIFO_MODE1,
  65         DAC33_FIFO_MODE7,
  66         DAC33_FIFO_LAST_MODE,
  67 };
  68
  69 #define DAC33_NUM_SUPPLIES 3
  70 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
  71         "AVDD",
  72         "DVDD",
  73         "IOVDD",
  74 };
  75
  76 struct tlv320dac33_priv {
  77         struct mutex mutex;
  78         struct workqueue_struct *dac33_wq;
  79         struct work_struct work;
  80         struct snd_soc_codec codec;
  81         struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
  82         int power_gpio;
  83         int chip_power;
  84         int irq;
  85         unsigned int refclk;
  86
  87         unsigned int alarm_threshold;   /* set to be half of LATENCY_TIME_MS */
  88         unsigned int nsample_min;       /* nsample should not be lower than
  89                                          * this */
  90         unsigned int nsample_max;       /* nsample should not be higher than
  91                                          * this */
  92         enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
  93         unsigned int nsample;           /* burst read amount from host */
  94
  95         enum dac33_state state;
  96 };
  97
  98 static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
  99 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
 100 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
 101 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
 102 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
 103 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
 104 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
 105 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
 106 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
 107 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
 108 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
 109 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
 110 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
 111 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
 112 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
 113 0x00, 0x00,             /* 0x38 - 0x39 */
 114 /* Registers 0x3a - 0x3f are reserved  */
 115             0x00, 0x00, /* 0x3a - 0x3b */
 116 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
 117
 118 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
 119 0x00, 0x80,             /* 0x44 - 0x45 */
 120 /* Registers 0x46 - 0x47 are reserved  */
 121             0x80, 0x80, /* 0x46 - 0x47 */
 122
 123 0x80, 0x00, 0x00,       /* 0x48 - 0x4a */
 124 /* Registers 0x4b - 0x7c are reserved  */
 125                   0x00, /* 0x4b        */
 126 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
 127 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
 128 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
 129 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
 130 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
 131 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
 132 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
 133 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
 134 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
 135 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
 136 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
 137 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
 138 0x00,                   /* 0x7c        */
 139
 140       0xda, 0x33, 0x03, /* 0x7d - 0x7f */
 141 };
 142
 143 /* Register read and write */
 144 static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
 145                                                 unsigned reg)
 146 {
 147         u8 *cache = codec->reg_cache;
 148         if (reg >= DAC33_CACHEREGNUM)
 149                 return 0;
 150
 151         return cache[reg];
 152 }
 153
 154 static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
 155                                          u8 reg, u8 value)
 156 {
 157         u8 *cache = codec->reg_cache;
 158         if (reg >= DAC33_CACHEREGNUM)
 159                 return;
 160
 161         cache[reg] = value;
 162 }
 163
 164 static int dac33_read(struct snd_soc_codec *codec, unsigned int reg,
 165                       u8 *value)
 166 {
 167         struct tlv320dac33_priv *dac33 = codec->private_data;
 168         int val;
 169
 170         *value = reg & 0xff;
 171
 172         /* If powered off, return the cached value */
 173         if (dac33->chip_power) {
 174                 val = i2c_smbus_read_byte_data(codec->control_data, value[0]);
 175                 if (val < 0) {
 176                         dev_err(codec->dev, "Read failed (%d)\n", val);
 177                         value[0] = dac33_read_reg_cache(codec, reg);
 178                 } else {
 179                         value[0] = val;
 180                         dac33_write_reg_cache(codec, reg, val);
 181                 }
 182         } else {
 183                 value[0] = dac33_read_reg_cache(codec, reg);
 184         }
 185
 186         return 0;
 187 }
 188
 189 static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
 190                        unsigned int value)
 191 {
 192         struct tlv320dac33_priv *dac33 = codec->private_data;
 193         u8 data[2];
 194         int ret = 0;
 195
 196         /*
 197          * data is
 198          *   D15..D8 dac33 register offset
 199          *   D7...D0 register data
 200          */
 201         data[0] = reg & 0xff;
 202         data[1] = value & 0xff;
 203
 204         dac33_write_reg_cache(codec, data[0], data[1]);
 205         if (dac33->chip_power) {
 206                 ret = codec->hw_write(codec->control_data, data, 2);
 207                 if (ret != 2)
 208                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 209                 else
 210                         ret = 0;
 211         }
 212
 213         return ret;
 214 }
 215
 216 static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
 217                        unsigned int value)
 218 {
 219         struct tlv320dac33_priv *dac33 = codec->private_data;
 220         int ret;
 221
 222         mutex_lock(&dac33->mutex);
 223         ret = dac33_write(codec, reg, value);
 224         mutex_unlock(&dac33->mutex);
 225
 226         return ret;
 227 }
 228
 229 #define DAC33_I2C_ADDR_AUTOINC  0x80
 230 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
 231                        unsigned int value)
 232 {
 233         struct tlv320dac33_priv *dac33 = codec->private_data;
 234         u8 data[3];
 235         int ret = 0;
 236
 237         /*
 238          * data is
 239          *   D23..D16 dac33 register offset
 240          *   D15..D8  register data MSB
 241          *   D7...D0  register data LSB
 242          */
 243         data[0] = reg & 0xff;
 244         data[1] = (value >> 8) & 0xff;
 245         data[2] = value & 0xff;
 246
 247         dac33_write_reg_cache(codec, data[0], data[1]);
 248         dac33_write_reg_cache(codec, data[0] + 1, data[2]);
 249
 250         if (dac33->chip_power) {
 251                 /* We need to set autoincrement mode for 16 bit writes */
 252                 data[0] |= DAC33_I2C_ADDR_AUTOINC;
 253                 ret = codec->hw_write(codec->control_data, data, 3);
 254                 if (ret != 3)
 255                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 256                 else
 257                         ret = 0;
 258         }
 259
 260         return ret;
 261 }
 262
 263 static void dac33_restore_regs(struct snd_soc_codec *codec)
 264 {
 265         struct tlv320dac33_priv *dac33 = codec->private_data;
 266         u8 *cache = codec->reg_cache;
 267         u8 data[2];
 268         int i, ret;
 269
 270         if (!dac33->chip_power)
 271                 return;
 272
 273         for (i = DAC33_PWR_CTRL; i <= DAC33_INTP_CTRL_B; i++) {
 274                 data[0] = i;
 275                 data[1] = cache[i];
 276                 /* Skip the read only registers */
 277                 if ((i >= DAC33_INT_OSC_STATUS &&
 278                                 i <= DAC33_INT_OSC_FREQ_RAT_READ_B) ||
 279                     (i >= DAC33_FIFO_WPTR_MSB && i <= DAC33_FIFO_IRQ_FLAG) ||
 280                     i == DAC33_DAC_STATUS_FLAGS ||
 281                     i == DAC33_SRC_EST_REF_CLK_RATIO_A ||
 282                     i == DAC33_SRC_EST_REF_CLK_RATIO_B)
 283                         continue;
 284                 ret = codec->hw_write(codec->control_data, data, 2);
 285                 if (ret != 2)
 286                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 287         }
 288         for (i = DAC33_LDAC_PWR_CTRL; i <= DAC33_LINEL_TO_LLO_VOL; i++) {
 289                 data[0] = i;
 290                 data[1] = cache[i];
 291                 ret = codec->hw_write(codec->control_data, data, 2);
 292                 if (ret != 2)
 293                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 294         }
 295         for (i = DAC33_LINER_TO_RLO_VOL; i <= DAC33_OSC_TRIM; i++) {
 296                 data[0] = i;
 297                 data[1] = cache[i];
 298                 ret = codec->hw_write(codec->control_data, data, 2);
 299                 if (ret != 2)
 300                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 301         }
 302 }
 303
 304 static inline void dac33_soft_power(struct snd_soc_codec *codec, int power)
 305 {
 306         u8 reg;
 307
 308         reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
 309         if (power)
 310                 reg |= DAC33_PDNALLB;
 311         else
 312                 reg &= ~DAC33_PDNALLB;
 313         dac33_write(codec, DAC33_PWR_CTRL, reg);
 314 }
 315
 316 static int dac33_hard_power(struct snd_soc_codec *codec, int power)
 317 {
 318         struct tlv320dac33_priv *dac33 = codec->private_data;
 319         int ret;
 320
 321         mutex_lock(&dac33->mutex);
 322         if (power) {
 323                 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
 324                                           dac33->supplies);
 325                 if (ret != 0) {
 326                         dev_err(codec->dev,
 327                                 "Failed to enable supplies: %d\n", ret);
 328                                 goto exit;
 329                 }
 330
 331                 if (dac33->power_gpio >= 0)
 332                         gpio_set_value(dac33->power_gpio, 1);
 333
 334                 dac33->chip_power = 1;
 335
 336                 /* Restore registers */
 337                 dac33_restore_regs(codec);
 338
 339                 dac33_soft_power(codec, 1);
 340         } else {
 341                 dac33_soft_power(codec, 0);
 342                 if (dac33->power_gpio >= 0)
 343                         gpio_set_value(dac33->power_gpio, 0);
 344
 345                 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
 346                                              dac33->supplies);
 347                 if (ret != 0) {
 348                         dev_err(codec->dev,
 349                                 "Failed to disable supplies: %d\n", ret);
 350                         goto exit;
 351                 }
 352
 353                 dac33->chip_power = 0;
 354         }
 355
 356 exit:
 357         mutex_unlock(&dac33->mutex);
 358         return ret;
 359 }
 360
 361 static int dac33_get_nsample(struct snd_kcontrol *kcontrol,
 362                          struct snd_ctl_elem_value *ucontrol)
 363 {
 364         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 365         struct tlv320dac33_priv *dac33 = codec->private_data;
 366
 367         ucontrol->value.integer.value[0] = dac33->nsample;
 368
 369         return 0;
 370 }
 371
 372 static int dac33_set_nsample(struct snd_kcontrol *kcontrol,
 373                          struct snd_ctl_elem_value *ucontrol)
 374 {
 375         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 376         struct tlv320dac33_priv *dac33 = codec->private_data;
 377         int ret = 0;
 378
 379         if (dac33->nsample == ucontrol->value.integer.value[0])
 380                 return 0;
 381
 382         if (ucontrol->value.integer.value[0] < dac33->nsample_min ||
 383             ucontrol->value.integer.value[0] > dac33->nsample_max)
 384                 ret = -EINVAL;
 385         else
 386                 dac33->nsample = ucontrol->value.integer.value[0];
 387
 388         return ret;
 389 }
 390
 391 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
 392                          struct snd_ctl_elem_value *ucontrol)
 393 {
 394         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 395         struct tlv320dac33_priv *dac33 = codec->private_data;
 396
 397         ucontrol->value.integer.value[0] = dac33->fifo_mode;
 398
 399         return 0;
 400 }
 401
 402 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
 403                          struct snd_ctl_elem_value *ucontrol)
 404 {
 405         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 406         struct tlv320dac33_priv *dac33 = codec->private_data;
 407         int ret = 0;
 408
 409         if (dac33->fifo_mode == ucontrol->value.integer.value[0])
 410                 return 0;
 411         /* Do not allow changes while stream is running*/
 412         if (codec->active)
 413                 return -EPERM;
 414
 415         if (ucontrol->value.integer.value[0] < 0 ||
 416             ucontrol->value.integer.value[0] >= DAC33_FIFO_LAST_MODE)
 417                 ret = -EINVAL;
 418         else
 419                 dac33->fifo_mode = ucontrol->value.integer.value[0];
 420
 421         return ret;
 422 }
 423
 424 /* Codec operation modes */
 425 static const char *dac33_fifo_mode_texts[] = {
 426         "Bypass", "Mode 1", "Mode 7"
 427 };
 428
 429 static const struct soc_enum dac33_fifo_mode_enum =
 430         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(dac33_fifo_mode_texts),
 431                             dac33_fifo_mode_texts);
 432
 433 /*
 434  * DACL/R digital volume control:
 435  * from 0 dB to -63.5 in 0.5 dB steps
 436  * Need to be inverted later on:
 437  * 0x00 == 0 dB
 438  * 0x7f == -63.5 dB
 439  */
 440 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
 441
 442 static const struct snd_kcontrol_new dac33_snd_controls[] = {
 443         SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
 444                 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
 445                 0, 0x7f, 1, dac_digivol_tlv),
 446         SOC_DOUBLE_R("DAC Digital Playback Switch",
 447                  DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
 448         SOC_DOUBLE_R("Line to Line Out Volume",
 449                  DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
 450 };
 451
 452 static const struct snd_kcontrol_new dac33_nsample_snd_controls[] = {
 453         SOC_SINGLE_EXT("nSample", 0, 0, 5900, 0,
 454                  dac33_get_nsample, dac33_set_nsample),
 455         SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
 456                  dac33_get_fifo_mode, dac33_set_fifo_mode),
 457 };
 458
 459 /* Analog bypass */
 460 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
 461         SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
 462
 463 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
 464         SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
 465
 466 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
 467         SND_SOC_DAPM_OUTPUT("LEFT_LO"),
 468         SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
 469
 470         SND_SOC_DAPM_INPUT("LINEL"),
 471         SND_SOC_DAPM_INPUT("LINER"),
 472
 473         SND_SOC_DAPM_DAC("DACL", "Left Playback", DAC33_LDAC_PWR_CTRL, 2, 0),
 474         SND_SOC_DAPM_DAC("DACR", "Right Playback", DAC33_RDAC_PWR_CTRL, 2, 0),
 475
 476         /* Analog bypass */
 477         SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
 478                                 &dac33_dapm_abypassl_control),
 479         SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
 480                                 &dac33_dapm_abypassr_control),
 481
 482         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amp Power",
 483                          DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
 484         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amp Power",
 485                          DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
 486 };
 487
 488 static const struct snd_soc_dapm_route audio_map[] = {
 489         /* Analog bypass */
 490         {"Analog Left Bypass", "Switch", "LINEL"},
 491         {"Analog Right Bypass", "Switch", "LINER"},
 492
 493         {"Output Left Amp Power", NULL, "DACL"},
 494         {"Output Right Amp Power", NULL, "DACR"},
 495
 496         {"Output Left Amp Power", NULL, "Analog Left Bypass"},
 497         {"Output Right Amp Power", NULL, "Analog Right Bypass"},
 498
 499         /* output */
 500         {"LEFT_LO", NULL, "Output Left Amp Power"},
 501         {"RIGHT_LO", NULL, "Output Right Amp Power"},
 502 };
 503
 504 static int dac33_add_widgets(struct snd_soc_codec *codec)
 505 {
 506         snd_soc_dapm_new_controls(codec, dac33_dapm_widgets,
 507                                   ARRAY_SIZE(dac33_dapm_widgets));
 508
 509         /* set up audio path interconnects */
 510         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 511
 512         return 0;
 513 }
 514
 515 static int dac33_set_bias_level(struct snd_soc_codec *codec,
 516                                 enum snd_soc_bias_level level)
 517 {
 518         int ret;
 519
 520         switch (level) {
 521         case SND_SOC_BIAS_ON:
 522                 dac33_soft_power(codec, 1);
 523                 break;
 524         case SND_SOC_BIAS_PREPARE:
 525                 break;
 526         case SND_SOC_BIAS_STANDBY:
 527                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 528                         ret = dac33_hard_power(codec, 1);
 529                         if (ret != 0)
 530                                 return ret;
 531                 }
 532
 533                 dac33_soft_power(codec, 0);
 534                 break;
 535         case SND_SOC_BIAS_OFF:
 536                 ret = dac33_hard_power(codec, 0);
 537                 if (ret != 0)
 538                         return ret;
 539
 540                 break;
 541         }
 542         codec->bias_level = level;
 543
 544         return 0;
 545 }
 546
 547 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
 548 {
 549         struct snd_soc_codec *codec;
 550
 551         codec = &dac33->codec;
 552
 553         switch (dac33->fifo_mode) {
 554         case DAC33_FIFO_MODE1:
 555                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
 556                                 DAC33_THRREG(dac33->nsample));
 557                 dac33_write16(codec, DAC33_PREFILL_MSB,
 558                                 DAC33_THRREG(dac33->alarm_threshold));
 559                 break;
 560         case DAC33_FIFO_MODE7:
 561                 dac33_write16(codec, DAC33_PREFILL_MSB,
 562                                 DAC33_THRREG(20));
 563                 break;
 564         default:
 565                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
 566                                                         dac33->fifo_mode);
 567                 break;
 568         }
 569 }
 570
 571 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
 572 {
 573         struct snd_soc_codec *codec;
 574
 575         codec = &dac33->codec;
 576
 577         switch (dac33->fifo_mode) {
 578         case DAC33_FIFO_MODE1:
 579                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
 580                                 DAC33_THRREG(dac33->nsample));
 581                 break;
 582         case DAC33_FIFO_MODE7:
 583                 /* At the moment we are not using interrupts in mode7 */
 584                 break;
 585         default:
 586                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
 587                                                         dac33->fifo_mode);
 588                 break;
 589         }
 590 }
 591
 592 static void dac33_work(struct work_struct *work)
 593 {
 594         struct snd_soc_codec *codec;
 595         struct tlv320dac33_priv *dac33;
 596         u8 reg;
 597
 598         dac33 = container_of(work, struct tlv320dac33_priv, work);
 599         codec = &dac33->codec;
 600
 601         mutex_lock(&dac33->mutex);
 602         switch (dac33->state) {
 603         case DAC33_PREFILL:
 604                 dac33->state = DAC33_PLAYBACK;
 605                 dac33_prefill_handler(dac33);
 606                 break;
 607         case DAC33_PLAYBACK:
 608                 dac33_playback_handler(dac33);
 609                 break;
 610         case DAC33_IDLE:
 611                 break;
 612         case DAC33_FLUSH:
 613                 dac33->state = DAC33_IDLE;
 614                 /* Mask all interrupts from dac33 */
 615                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
 616
 617                 /* flush fifo */
 618                 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
 619                 reg |= DAC33_FIFOFLUSH;
 620                 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
 621                 break;
 622         }
 623         mutex_unlock(&dac33->mutex);
 624 }
 625
 626 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
 627 {
 628         struct snd_soc_codec *codec = dev;
 629         struct tlv320dac33_priv *dac33 = codec->private_data;
 630
 631         queue_work(dac33->dac33_wq, &dac33->work);
 632
 633         return IRQ_HANDLED;
 634 }
 635
 636 static void dac33_shutdown(struct snd_pcm_substream *substream,
 637                              struct snd_soc_dai *dai)
 638 {
 639         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 640         struct snd_soc_device *socdev = rtd->socdev;
 641         struct snd_soc_codec *codec = socdev->card->codec;
 642         struct tlv320dac33_priv *dac33 = codec->private_data;
 643         unsigned int pwr_ctrl;
 644
 645         /* Stop pending workqueue */
 646         if (dac33->fifo_mode)
 647                 cancel_work_sync(&dac33->work);
 648
 649         mutex_lock(&dac33->mutex);
 650         pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
 651         pwr_ctrl &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB);
 652         dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
 653         mutex_unlock(&dac33->mutex);
 654 }
 655
 656 static void dac33_oscwait(struct snd_soc_codec *codec)
 657 {
 658         int timeout = 20;
 659         u8 reg;
 660
 661         do {
 662                 msleep(1);
 663                 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
 664         } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
 665         if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
 666                 dev_err(codec->dev,
 667                         "internal oscillator calibration failed\n");
 668 }
 669
 670 static int dac33_hw_params(struct snd_pcm_substream *substream,
 671                            struct snd_pcm_hw_params *params,
 672                            struct snd_soc_dai *dai)
 673 {
 674         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 675         struct snd_soc_device *socdev = rtd->socdev;
 676         struct snd_soc_codec *codec = socdev->card->codec;
 677
 678         /* Check parameters for validity */
 679         switch (params_rate(params)) {
 680         case 44100:
 681         case 48000:
 682                 break;
 683         default:
 684                 dev_err(codec->dev, "unsupported rate %d\n",
 685                         params_rate(params));
 686                 return -EINVAL;
 687         }
 688
 689         switch (params_format(params)) {
 690         case SNDRV_PCM_FORMAT_S16_LE:
 691                 break;
 692         default:
 693                 dev_err(codec->dev, "unsupported format %d\n",
 694                         params_format(params));
 695                 return -EINVAL;
 696         }
 697
 698         return 0;
 699 }
 700
 701 #define CALC_OSCSET(rate, refclk) ( \
 702         ((((rate * 10000) / refclk) * 4096) + 5000) / 10000)
 703 #define CALC_RATIOSET(rate, refclk) ( \
 704         ((((refclk  * 100000) / rate) * 16384) + 50000) / 100000)
 705
 706 /*
 707  * tlv320dac33 is strict on the sequence of the register writes, if the register
 708  * writes happens in different order, than dac33 might end up in unknown state.
 709  * Use the known, working sequence of register writes to initialize the dac33.
 710  */
 711 static int dac33_prepare_chip(struct snd_pcm_substream *substream)
 712 {
 713         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 714         struct snd_soc_device *socdev = rtd->socdev;
 715         struct snd_soc_codec *codec = socdev->card->codec;
 716         struct tlv320dac33_priv *dac33 = codec->private_data;
 717         unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
 718         u8 aictrl_a, aictrl_b, fifoctrl_a;
 719
 720         switch (substream->runtime->rate) {
 721         case 44100:
 722         case 48000:
 723                 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
 724                 ratioset = CALC_RATIOSET(substream->runtime->rate,
 725                                          dac33->refclk);
 726                 break;
 727         default:
 728                 dev_err(codec->dev, "unsupported rate %d\n",
 729                         substream->runtime->rate);
 730                 return -EINVAL;
 731         }
 732
 733
 734         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
 735         aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
 736         fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
 737         fifoctrl_a &= ~DAC33_WIDTH;
 738         switch (substream->runtime->format) {
 739         case SNDRV_PCM_FORMAT_S16_LE:
 740                 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
 741                 fifoctrl_a |= DAC33_WIDTH;
 742                 break;
 743         default:
 744                 dev_err(codec->dev, "unsupported format %d\n",
 745                         substream->runtime->format);
 746                 return -EINVAL;
 747         }
 748
 749         mutex_lock(&dac33->mutex);
 750         dac33_soft_power(codec, 1);
 751
 752         reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
 753         dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
 754
 755         /* Write registers 0x08 and 0x09 (MSB, LSB) */
 756         dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
 757
 758         /* calib time: 128 is a nice number ;) */
 759         dac33_write(codec, DAC33_CALIB_TIME, 128);
 760
 761         /* adjustment treshold & step */
 762         dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
 763                                                  DAC33_ADJSTEP(1));
 764
 765         /* div=4 / gain=1 / div */
 766         dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
 767
 768         pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
 769         pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
 770         dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
 771
 772         dac33_oscwait(codec);
 773
 774         if (dac33->fifo_mode) {
 775                 /* Generic for all FIFO modes */
 776                 /* 50-51 : ASRC Control registers */
 777                 dac33_write(codec, DAC33_ASRC_CTRL_A, (1 << 4)); /* div=2 */
 778                 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
 779
 780                 /* Write registers 0x34 and 0x35 (MSB, LSB) */
 781                 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
 782
 783                 /* Set interrupts to high active */
 784                 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
 785         } else {
 786                 /* FIFO bypass mode */
 787                 /* 50-51 : ASRC Control registers */
 788                 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
 789                 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
 790         }
 791
 792         /* Interrupt behaviour configuration */
 793         switch (dac33->fifo_mode) {
 794         case DAC33_FIFO_MODE1:
 795                 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
 796                             DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
 797                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
 798                 break;
 799         case DAC33_FIFO_MODE7:
 800                 /* Disable all interrupts */
 801                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
 802                 break;
 803         default:
 804                 /* in FIFO bypass mode, the interrupts are not used */
 805                 break;
 806         }
 807
 808         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
 809
 810         switch (dac33->fifo_mode) {
 811         case DAC33_FIFO_MODE1:
 812                 /*
 813                  * For mode1:
 814                  * Disable the FIFO bypass (Enable the use of FIFO)
 815                  * Select nSample mode
 816                  * BCLK is only running when data is needed by DAC33
 817                  */
 818                 fifoctrl_a &= ~DAC33_FBYPAS;
 819                 fifoctrl_a &= ~DAC33_FAUTO;
 820                 aictrl_b &= ~DAC33_BCLKON;
 821                 break;
 822         case DAC33_FIFO_MODE7:
 823                 /*
 824                  * For mode1:
 825                  * Disable the FIFO bypass (Enable the use of FIFO)
 826                  * Select Threshold mode
 827                  * BCLK is only running when data is needed by DAC33
 828                  */
 829                 fifoctrl_a &= ~DAC33_FBYPAS;
 830                 fifoctrl_a |= DAC33_FAUTO;
 831                 aictrl_b &= ~DAC33_BCLKON;
 832                 break;
 833         default:
 834                 /*
 835                  * For FIFO bypass mode:
 836                  * Enable the FIFO bypass (Disable the FIFO use)
 837                  * Set the BCLK as continous
 838                  */
 839                 fifoctrl_a |= DAC33_FBYPAS;
 840                 aictrl_b |= DAC33_BCLKON;
 841                 break;
 842         }
 843
 844         dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
 845         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
 846         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
 847
 848         switch (dac33->fifo_mode) {
 849         case DAC33_FIFO_MODE1:
 850                 /* 20: BCLK divide ratio */
 851                 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 3);
 852
 853                 dac33_write16(codec, DAC33_ATHR_MSB,
 854                               DAC33_THRREG(dac33->alarm_threshold));
 855                 break;
 856         case DAC33_FIFO_MODE7:
 857                 /*
 858                  * Configure the threshold levels, and leave 10 sample space
 859                  * at the bottom, and also at the top of the FIFO
 860                  */
 861                 dac33_write16(codec, DAC33_UTHR_MSB,
 862                         DAC33_THRREG(DAC33_BUFFER_SIZE_SAMPLES - 10));
 863                 dac33_write16(codec, DAC33_LTHR_MSB,
 864                         DAC33_THRREG(10));
 865                 break;
 866         default:
 867                 /* BYPASS mode */
 868                 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
 869                 break;
 870         }
 871
 872         mutex_unlock(&dac33->mutex);
 873
 874         return 0;
 875 }
 876
 877 static void dac33_calculate_times(struct snd_pcm_substream *substream)
 878 {
 879         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 880         struct snd_soc_device *socdev = rtd->socdev;
 881         struct snd_soc_codec *codec = socdev->card->codec;
 882         struct tlv320dac33_priv *dac33 = codec->private_data;
 883         unsigned int nsample_limit;
 884
 885         /* Number of samples (16bit, stereo) in one period */
 886         dac33->nsample_min = snd_pcm_lib_period_bytes(substream) / 4;
 887
 888         /* Number of samples (16bit, stereo) in ALSA buffer */
 889         dac33->nsample_max = snd_pcm_lib_buffer_bytes(substream) / 4;
 890         /* Subtract one period from the total */
 891         dac33->nsample_max -= dac33->nsample_min;
 892
 893         /* Number of samples for LATENCY_TIME_MS / 2 */
 894         dac33->alarm_threshold = substream->runtime->rate /
 895                                  (1000 / (LATENCY_TIME_MS / 2));
 896
 897         /* Find and fix up the lowest nsmaple limit */
 898         nsample_limit = substream->runtime->rate / (1000 / LATENCY_TIME_MS);
 899
 900         if (dac33->nsample_min < nsample_limit)
 901                 dac33->nsample_min = nsample_limit;
 902
 903         if (dac33->nsample < dac33->nsample_min)
 904                 dac33->nsample = dac33->nsample_min;
 905
 906         /*
 907          * Find and fix up the highest nsmaple limit
 908          * In order to not overflow the DAC33 buffer substract the
 909          * alarm_threshold value from the size of the DAC33 buffer
 910          */
 911         nsample_limit = DAC33_BUFFER_SIZE_SAMPLES - dac33->alarm_threshold;
 912
 913         if (dac33->nsample_max > nsample_limit)
 914                 dac33->nsample_max = nsample_limit;
 915
 916         if (dac33->nsample > dac33->nsample_max)
 917                 dac33->nsample = dac33->nsample_max;
 918 }
 919
 920 static int dac33_pcm_prepare(struct snd_pcm_substream *substream,
 921                              struct snd_soc_dai *dai)
 922 {
 923         dac33_calculate_times(substream);
 924         dac33_prepare_chip(substream);
 925
 926         return 0;
 927 }
 928
 929 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
 930                              struct snd_soc_dai *dai)
 931 {
 932         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 933         struct snd_soc_device *socdev = rtd->socdev;
 934         struct snd_soc_codec *codec = socdev->card->codec;
 935         struct tlv320dac33_priv *dac33 = codec->private_data;
 936         int ret = 0;
 937
 938         switch (cmd) {
 939         case SNDRV_PCM_TRIGGER_START:
 940         case SNDRV_PCM_TRIGGER_RESUME:
 941         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 942                 if (dac33->fifo_mode) {
 943                         dac33->state = DAC33_PREFILL;
 944                         queue_work(dac33->dac33_wq, &dac33->work);
 945                 }
 946                 break;
 947         case SNDRV_PCM_TRIGGER_STOP:
 948         case SNDRV_PCM_TRIGGER_SUSPEND:
 949         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 950                 if (dac33->fifo_mode) {
 951                         dac33->state = DAC33_FLUSH;
 952                         queue_work(dac33->dac33_wq, &dac33->work);
 953                 }
 954                 break;
 955         default:
 956                 ret = -EINVAL;
 957         }
 958
 959         return ret;
 960 }
 961
 962 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 963                 int clk_id, unsigned int freq, int dir)
 964 {
 965         struct snd_soc_codec *codec = codec_dai->codec;
 966         struct tlv320dac33_priv *dac33 = codec->private_data;
 967         u8 ioc_reg, asrcb_reg;
 968
 969         ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
 970         asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
 971         switch (clk_id) {
 972         case TLV320DAC33_MCLK:
 973                 ioc_reg |= DAC33_REFSEL;
 974                 asrcb_reg |= DAC33_SRCREFSEL;
 975                 break;
 976         case TLV320DAC33_SLEEPCLK:
 977                 ioc_reg &= ~DAC33_REFSEL;
 978                 asrcb_reg &= ~DAC33_SRCREFSEL;
 979                 break;
 980         default:
 981                 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
 982                 break;
 983         }
 984         dac33->refclk = freq;
 985
 986         dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
 987         dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
 988
 989         return 0;
 990 }
 991
 992 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
 993                              unsigned int fmt)
 994 {
 995         struct snd_soc_codec *codec = codec_dai->codec;
 996         u8 aictrl_a, aictrl_b;
 997
 998         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
 999         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1000         /* set master/slave audio interface */
1001         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1002         case SND_SOC_DAIFMT_CBM_CFM:
1003                 /* Codec Master */
1004                 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1005                 break;
1006         case SND_SOC_DAIFMT_CBS_CFS:
1007                 /* Codec Slave */
1008                 aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1009                 break;
1010         default:
1011                 return -EINVAL;
1012         }
1013
1014         aictrl_a &= ~DAC33_AFMT_MASK;
1015         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1016         case SND_SOC_DAIFMT_I2S:
1017                 aictrl_a |= DAC33_AFMT_I2S;
1018                 break;
1019         case SND_SOC_DAIFMT_DSP_A:
1020                 aictrl_a |= DAC33_AFMT_DSP;
1021                 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1022                 aictrl_b |= DAC33_DATA_DELAY(1); /* 1 bit delay */
1023                 break;
1024         case SND_SOC_DAIFMT_DSP_B:
1025                 aictrl_a |= DAC33_AFMT_DSP;
1026                 aictrl_b &= ~DAC33_DATA_DELAY_MASK; /* No delay */
1027                 break;
1028         case SND_SOC_DAIFMT_RIGHT_J:
1029                 aictrl_a |= DAC33_AFMT_RIGHT_J;
1030                 break;
1031         case SND_SOC_DAIFMT_LEFT_J:
1032                 aictrl_a |= DAC33_AFMT_LEFT_J;
1033                 break;
1034         default:
1035                 dev_err(codec->dev, "Unsupported format (%u)\n",
1036                         fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1037                 return -EINVAL;
1038         }
1039
1040         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1041         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1042
1043         return 0;
1044 }
1045
1046 static void dac33_init_chip(struct snd_soc_codec *codec)
1047 {
1048         /* 44-46: DAC Control Registers */
1049         /* A : DAC sample rate Fsref/1.5 */
1050         dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(1));
1051         /* B : DAC src=normal, not muted */
1052         dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
1053                                              DAC33_DACSRCL_LEFT);
1054         /* C : (defaults) */
1055         dac33_write(codec, DAC33_DAC_CTRL_C, 0x00);
1056
1057         /* 64-65 : L&R DAC power control
1058          Line In -> OUT 1V/V Gain, DAC -> OUT 4V/V Gain*/
1059         dac33_write(codec, DAC33_LDAC_PWR_CTRL, DAC33_LROUT_GAIN(2));
1060         dac33_write(codec, DAC33_RDAC_PWR_CTRL, DAC33_LROUT_GAIN(2));
1061
1062         /* 73 : volume soft stepping control,
1063          clock source = internal osc (?) */
1064         dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
1065
1066         /* 66 : LOP/LOM Modes */
1067         dac33_write(codec, DAC33_OUT_AMP_CM_CTRL, 0xff);
1068
1069         /* 68 : LOM inverted from LOP */
1070         dac33_write(codec, DAC33_OUT_AMP_CTRL, (3<<2));
1071
1072         dac33_write(codec, DAC33_PWR_CTRL, DAC33_PDNALLB);
1073 }
1074
1075 static int dac33_soc_probe(struct platform_device *pdev)
1076 {
1077         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1078         struct snd_soc_codec *codec;
1079         struct tlv320dac33_priv *dac33;
1080         int ret = 0;
1081
1082         BUG_ON(!tlv320dac33_codec);
1083
1084         codec = tlv320dac33_codec;
1085         socdev->card->codec = codec;
1086         dac33 = codec->private_data;
1087
1088         /* Power up the codec */
1089         dac33_hard_power(codec, 1);
1090         /* Set default configuration */
1091         dac33_init_chip(codec);
1092
1093         /* register pcms */
1094         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
1095         if (ret < 0) {
1096                 dev_err(codec->dev, "failed to create pcms\n");
1097                 goto pcm_err;
1098         }
1099
1100         snd_soc_add_controls(codec, dac33_snd_controls,
1101                              ARRAY_SIZE(dac33_snd_controls));
1102         /* Only add the nSample controls, if we have valid IRQ number */
1103         if (dac33->irq >= 0)
1104                 snd_soc_add_controls(codec, dac33_nsample_snd_controls,
1105                                      ARRAY_SIZE(dac33_nsample_snd_controls));
1106
1107         dac33_add_widgets(codec);
1108
1109         /* power on device */
1110         dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1111
1112         /* Bias level configuration has enabled regulator an extra time */
1113         regulator_bulk_disable(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1114
1115         return 0;
1116
1117 pcm_err:
1118         dac33_hard_power(codec, 0);
1119         return ret;
1120 }
1121
1122 static int dac33_soc_remove(struct platform_device *pdev)
1123 {
1124         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1125         struct snd_soc_codec *codec = socdev->card->codec;
1126
1127         dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1128
1129         snd_soc_free_pcms(socdev);
1130         snd_soc_dapm_free(socdev);
1131
1132         return 0;
1133 }
1134
1135 static int dac33_soc_suspend(struct platform_device *pdev, pm_message_t state)
1136 {
1137         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1138         struct snd_soc_codec *codec = socdev->card->codec;
1139
1140         dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1141
1142         return 0;
1143 }
1144
1145 static int dac33_soc_resume(struct platform_device *pdev)
1146 {
1147         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1148         struct snd_soc_codec *codec = socdev->card->codec;
1149
1150         dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1151         dac33_set_bias_level(codec, codec->suspend_bias_level);
1152
1153         return 0;
1154 }
1155
1156 struct snd_soc_codec_device soc_codec_dev_tlv320dac33 = {
1157         .probe = dac33_soc_probe,
1158         .remove = dac33_soc_remove,
1159         .suspend = dac33_soc_suspend,
1160         .resume = dac33_soc_resume,
1161 };
1162 EXPORT_SYMBOL_GPL(soc_codec_dev_tlv320dac33);
1163
1164 #define DAC33_RATES     (SNDRV_PCM_RATE_44100 | \
1165                          SNDRV_PCM_RATE_48000)
1166 #define DAC33_FORMATS   SNDRV_PCM_FMTBIT_S16_LE
1167
1168 static struct snd_soc_dai_ops dac33_dai_ops = {
1169         .shutdown       = dac33_shutdown,
1170         .hw_params      = dac33_hw_params,
1171         .prepare        = dac33_pcm_prepare,
1172         .trigger        = dac33_pcm_trigger,
1173         .set_sysclk     = dac33_set_dai_sysclk,
1174         .set_fmt        = dac33_set_dai_fmt,
1175 };
1176
1177 struct snd_soc_dai dac33_dai = {
1178         .name = "tlv320dac33",
1179         .playback = {
1180                 .stream_name = "Playback",
1181                 .channels_min = 2,
1182                 .channels_max = 2,
1183                 .rates = DAC33_RATES,
1184                 .formats = DAC33_FORMATS,},
1185         .ops = &dac33_dai_ops,
1186 };
1187 EXPORT_SYMBOL_GPL(dac33_dai);
1188
1189 static int dac33_i2c_probe(struct i2c_client *client,
1190                            const struct i2c_device_id *id)
1191 {
1192         struct tlv320dac33_platform_data *pdata;
1193         struct tlv320dac33_priv *dac33;
1194         struct snd_soc_codec *codec;
1195         int ret, i;
1196
1197         if (client->dev.platform_data == NULL) {
1198                 dev_err(&client->dev, "Platform data not set\n");
1199                 return -ENODEV;
1200         }
1201         pdata = client->dev.platform_data;
1202
1203         dac33 = kzalloc(sizeof(struct tlv320dac33_priv), GFP_KERNEL);
1204         if (dac33 == NULL)
1205                 return -ENOMEM;
1206
1207         codec = &dac33->codec;
1208         codec->private_data = dac33;
1209         codec->control_data = client;
1210
1211         mutex_init(&codec->mutex);
1212         mutex_init(&dac33->mutex);
1213         INIT_LIST_HEAD(&codec->dapm_widgets);
1214         INIT_LIST_HEAD(&codec->dapm_paths);
1215
1216         codec->name = "tlv320dac33";
1217         codec->owner = THIS_MODULE;
1218         codec->read = dac33_read_reg_cache;
1219         codec->write = dac33_write_locked;
1220         codec->hw_write = (hw_write_t) i2c_master_send;
1221         codec->bias_level = SND_SOC_BIAS_OFF;
1222         codec->set_bias_level = dac33_set_bias_level;
1223         codec->dai = &dac33_dai;
1224         codec->num_dai = 1;
1225         codec->reg_cache_size = ARRAY_SIZE(dac33_reg);
1226         codec->reg_cache = kmemdup(dac33_reg, ARRAY_SIZE(dac33_reg),
1227                                    GFP_KERNEL);
1228         if (codec->reg_cache == NULL) {
1229                 ret = -ENOMEM;
1230                 goto error_reg;
1231         }
1232
1233         i2c_set_clientdata(client, dac33);
1234
1235         dac33->power_gpio = pdata->power_gpio;
1236         dac33->irq = client->irq;
1237         dac33->nsample = NSAMPLE_MAX;
1238         /* Disable FIFO use by default */
1239         dac33->fifo_mode = DAC33_FIFO_BYPASS;
1240
1241         tlv320dac33_codec = codec;
1242
1243         codec->dev = &client->dev;
1244         dac33_dai.dev = codec->dev;
1245
1246         /* Check if the reset GPIO number is valid and request it */
1247         if (dac33->power_gpio >= 0) {
1248                 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1249                 if (ret < 0) {
1250                         dev_err(codec->dev,
1251                                 "Failed to request reset GPIO (%d)\n",
1252                                 dac33->power_gpio);
1253                         snd_soc_unregister_dai(&dac33_dai);
1254                         snd_soc_unregister_codec(codec);
1255                         goto error_gpio;
1256                 }
1257                 gpio_direction_output(dac33->power_gpio, 0);
1258         } else {
1259                 dac33->chip_power = 1;
1260         }
1261
1262         /* Check if the IRQ number is valid and request it */
1263         if (dac33->irq >= 0) {
1264                 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1265                                   IRQF_TRIGGER_RISING | IRQF_DISABLED,
1266                                   codec->name, codec);
1267                 if (ret < 0) {
1268                         dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1269                                                 dac33->irq, ret);
1270                         dac33->irq = -1;
1271                 }
1272                 if (dac33->irq != -1) {
1273                         /* Setup work queue */
1274                         dac33->dac33_wq =
1275                                 create_singlethread_workqueue("tlv320dac33");
1276                         if (dac33->dac33_wq == NULL) {
1277                                 free_irq(dac33->irq, &dac33->codec);
1278                                 ret = -ENOMEM;
1279                                 goto error_wq;
1280                         }
1281
1282                         INIT_WORK(&dac33->work, dac33_work);
1283                 }
1284         }
1285
1286         for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1287                 dac33->supplies[i].supply = dac33_supply_names[i];
1288
1289         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(dac33->supplies),
1290                                  dac33->supplies);
1291
1292         if (ret != 0) {
1293                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
1294                 goto err_get;
1295         }
1296
1297         ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
1298                                     dac33->supplies);
1299         if (ret != 0) {
1300                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
1301                 goto err_enable;
1302         }
1303
1304         ret = snd_soc_register_codec(codec);
1305         if (ret != 0) {
1306                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
1307                 goto error_codec;
1308         }
1309
1310         ret = snd_soc_register_dai(&dac33_dai);
1311         if (ret != 0) {
1312                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
1313                 snd_soc_unregister_codec(codec);
1314                 goto error_codec;
1315         }
1316
1317         /* Shut down the codec for now */
1318         dac33_hard_power(codec, 0);
1319
1320         return ret;
1321
1322 error_codec:
1323         regulator_bulk_disable(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1324 err_enable:
1325         regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1326 err_get:
1327         if (dac33->irq >= 0) {
1328                 free_irq(dac33->irq, &dac33->codec);
1329                 destroy_workqueue(dac33->dac33_wq);
1330         }
1331 error_wq:
1332         if (dac33->power_gpio >= 0)
1333                 gpio_free(dac33->power_gpio);
1334 error_gpio:
1335         kfree(codec->reg_cache);
1336 error_reg:
1337         tlv320dac33_codec = NULL;
1338         kfree(dac33);
1339
1340         return ret;
1341 }
1342
1343 static int dac33_i2c_remove(struct i2c_client *client)
1344 {
1345         struct tlv320dac33_priv *dac33;
1346
1347         dac33 = i2c_get_clientdata(client);
1348         dac33_hard_power(&dac33->codec, 0);
1349
1350         if (dac33->power_gpio >= 0)
1351                 gpio_free(dac33->power_gpio);
1352         if (dac33->irq >= 0)
1353                 free_irq(dac33->irq, &dac33->codec);
1354
1355         regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1356
1357         destroy_workqueue(dac33->dac33_wq);
1358         snd_soc_unregister_dai(&dac33_dai);
1359         snd_soc_unregister_codec(&dac33->codec);
1360         kfree(dac33->codec.reg_cache);
1361         kfree(dac33);
1362         tlv320dac33_codec = NULL;
1363
1364         return 0;
1365 }
1366
1367 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1368         {
1369                 .name = "tlv320dac33",
1370                 .driver_data = 0,
1371         },
1372         { },
1373 };
1374
1375 static struct i2c_driver tlv320dac33_i2c_driver = {
1376         .driver = {
1377                 .name = "tlv320dac33",
1378                 .owner = THIS_MODULE,
1379         },
1380         .probe          = dac33_i2c_probe,
1381         .remove         = __devexit_p(dac33_i2c_remove),
1382         .id_table       = tlv320dac33_i2c_id,
1383 };
1384
1385 static int __init dac33_module_init(void)
1386 {
1387         int r;
1388         r = i2c_add_driver(&tlv320dac33_i2c_driver);
1389         if (r < 0) {
1390                 printk(KERN_ERR "DAC33: driver registration failed\n");
1391                 return r;
1392         }
1393         return 0;
1394 }
1395 module_init(dac33_module_init);
1396
1397 static void __exit dac33_module_exit(void)
1398 {
1399         i2c_del_driver(&tlv320dac33_i2c_driver);
1400 }
1401 module_exit(dac33_module_exit);
1402
1403
1404 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1405 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
1406 MODULE_LICENSE("GPL");