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         u8 burst_bclkdiv;               /* BCLK divider value in burst mode */
  95
  96         enum dac33_state state;
  97 };
  98
  99 static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
 100 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
 101 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
 102 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
 103 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
 104 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
 105 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
 106 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
 107 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
 108 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
 109 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
 110 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
 111 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
 112 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
 113 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
 114 0x00, 0x00,             /* 0x38 - 0x39 */
 115 /* Registers 0x3a - 0x3f are reserved  */
 116             0x00, 0x00, /* 0x3a - 0x3b */
 117 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
 118
 119 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
 120 0x00, 0x80,             /* 0x44 - 0x45 */
 121 /* Registers 0x46 - 0x47 are reserved  */
 122             0x80, 0x80, /* 0x46 - 0x47 */
 123
 124 0x80, 0x00, 0x00,       /* 0x48 - 0x4a */
 125 /* Registers 0x4b - 0x7c are reserved  */
 126                   0x00, /* 0x4b        */
 127 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
 128 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
 129 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
 130 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
 131 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
 132 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
 133 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
 134 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
 135 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
 136 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
 137 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
 138 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
 139 0x00,                   /* 0x7c        */
 140
 141       0xda, 0x33, 0x03, /* 0x7d - 0x7f */
 142 };
 143
 144 /* Register read and write */
 145 static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
 146                                                 unsigned reg)
 147 {
 148         u8 *cache = codec->reg_cache;
 149         if (reg >= DAC33_CACHEREGNUM)
 150                 return 0;
 151
 152         return cache[reg];
 153 }
 154
 155 static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
 156                                          u8 reg, u8 value)
 157 {
 158         u8 *cache = codec->reg_cache;
 159         if (reg >= DAC33_CACHEREGNUM)
 160                 return;
 161
 162         cache[reg] = value;
 163 }
 164
 165 static int dac33_read(struct snd_soc_codec *codec, unsigned int reg,
 166                       u8 *value)
 167 {
 168         struct tlv320dac33_priv *dac33 = codec->private_data;
 169         int val;
 170
 171         *value = reg & 0xff;
 172
 173         /* If powered off, return the cached value */
 174         if (dac33->chip_power) {
 175                 val = i2c_smbus_read_byte_data(codec->control_data, value[0]);
 176                 if (val < 0) {
 177                         dev_err(codec->dev, "Read failed (%d)\n", val);
 178                         value[0] = dac33_read_reg_cache(codec, reg);
 179                 } else {
 180                         value[0] = val;
 181                         dac33_write_reg_cache(codec, reg, val);
 182                 }
 183         } else {
 184                 value[0] = dac33_read_reg_cache(codec, reg);
 185         }
 186
 187         return 0;
 188 }
 189
 190 static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
 191                        unsigned int value)
 192 {
 193         struct tlv320dac33_priv *dac33 = codec->private_data;
 194         u8 data[2];
 195         int ret = 0;
 196
 197         /*
 198          * data is
 199          *   D15..D8 dac33 register offset
 200          *   D7...D0 register data
 201          */
 202         data[0] = reg & 0xff;
 203         data[1] = value & 0xff;
 204
 205         dac33_write_reg_cache(codec, data[0], data[1]);
 206         if (dac33->chip_power) {
 207                 ret = codec->hw_write(codec->control_data, data, 2);
 208                 if (ret != 2)
 209                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 210                 else
 211                         ret = 0;
 212         }
 213
 214         return ret;
 215 }
 216
 217 static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
 218                        unsigned int value)
 219 {
 220         struct tlv320dac33_priv *dac33 = codec->private_data;
 221         int ret;
 222
 223         mutex_lock(&dac33->mutex);
 224         ret = dac33_write(codec, reg, value);
 225         mutex_unlock(&dac33->mutex);
 226
 227         return ret;
 228 }
 229
 230 #define DAC33_I2C_ADDR_AUTOINC  0x80
 231 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
 232                        unsigned int value)
 233 {
 234         struct tlv320dac33_priv *dac33 = codec->private_data;
 235         u8 data[3];
 236         int ret = 0;
 237
 238         /*
 239          * data is
 240          *   D23..D16 dac33 register offset
 241          *   D15..D8  register data MSB
 242          *   D7...D0  register data LSB
 243          */
 244         data[0] = reg & 0xff;
 245         data[1] = (value >> 8) & 0xff;
 246         data[2] = value & 0xff;
 247
 248         dac33_write_reg_cache(codec, data[0], data[1]);
 249         dac33_write_reg_cache(codec, data[0] + 1, data[2]);
 250
 251         if (dac33->chip_power) {
 252                 /* We need to set autoincrement mode for 16 bit writes */
 253                 data[0] |= DAC33_I2C_ADDR_AUTOINC;
 254                 ret = codec->hw_write(codec->control_data, data, 3);
 255                 if (ret != 3)
 256                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 257                 else
 258                         ret = 0;
 259         }
 260
 261         return ret;
 262 }
 263
 264 static void dac33_restore_regs(struct snd_soc_codec *codec)
 265 {
 266         struct tlv320dac33_priv *dac33 = codec->private_data;
 267         u8 *cache = codec->reg_cache;
 268         u8 data[2];
 269         int i, ret;
 270
 271         if (!dac33->chip_power)
 272                 return;
 273
 274         for (i = DAC33_PWR_CTRL; i <= DAC33_INTP_CTRL_B; i++) {
 275                 data[0] = i;
 276                 data[1] = cache[i];
 277                 /* Skip the read only registers */
 278                 if ((i >= DAC33_INT_OSC_STATUS &&
 279                                 i <= DAC33_INT_OSC_FREQ_RAT_READ_B) ||
 280                     (i >= DAC33_FIFO_WPTR_MSB && i <= DAC33_FIFO_IRQ_FLAG) ||
 281                     i == DAC33_DAC_STATUS_FLAGS ||
 282                     i == DAC33_SRC_EST_REF_CLK_RATIO_A ||
 283                     i == DAC33_SRC_EST_REF_CLK_RATIO_B)
 284                         continue;
 285                 ret = codec->hw_write(codec->control_data, data, 2);
 286                 if (ret != 2)
 287                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 288         }
 289         for (i = DAC33_LDAC_PWR_CTRL; i <= DAC33_LINEL_TO_LLO_VOL; i++) {
 290                 data[0] = i;
 291                 data[1] = cache[i];
 292                 ret = codec->hw_write(codec->control_data, data, 2);
 293                 if (ret != 2)
 294                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 295         }
 296         for (i = DAC33_LINER_TO_RLO_VOL; i <= DAC33_OSC_TRIM; i++) {
 297                 data[0] = i;
 298                 data[1] = cache[i];
 299                 ret = codec->hw_write(codec->control_data, data, 2);
 300                 if (ret != 2)
 301                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 302         }
 303 }
 304
 305 static inline void dac33_soft_power(struct snd_soc_codec *codec, int power)
 306 {
 307         u8 reg;
 308
 309         reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
 310         if (power)
 311                 reg |= DAC33_PDNALLB;
 312         else
 313                 reg &= ~DAC33_PDNALLB;
 314         dac33_write(codec, DAC33_PWR_CTRL, reg);
 315 }
 316
 317 static int dac33_hard_power(struct snd_soc_codec *codec, int power)
 318 {
 319         struct tlv320dac33_priv *dac33 = codec->private_data;
 320         int ret;
 321
 322         mutex_lock(&dac33->mutex);
 323         if (power) {
 324                 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
 325                                           dac33->supplies);
 326                 if (ret != 0) {
 327                         dev_err(codec->dev,
 328                                 "Failed to enable supplies: %d\n", ret);
 329                                 goto exit;
 330                 }
 331
 332                 if (dac33->power_gpio >= 0)
 333                         gpio_set_value(dac33->power_gpio, 1);
 334
 335                 dac33->chip_power = 1;
 336
 337                 /* Restore registers */
 338                 dac33_restore_regs(codec);
 339
 340                 dac33_soft_power(codec, 1);
 341         } else {
 342                 dac33_soft_power(codec, 0);
 343                 if (dac33->power_gpio >= 0)
 344                         gpio_set_value(dac33->power_gpio, 0);
 345
 346                 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
 347                                              dac33->supplies);
 348                 if (ret != 0) {
 349                         dev_err(codec->dev,
 350                                 "Failed to disable supplies: %d\n", ret);
 351                         goto exit;
 352                 }
 353
 354                 dac33->chip_power = 0;
 355         }
 356
 357 exit:
 358         mutex_unlock(&dac33->mutex);
 359         return ret;
 360 }
 361
 362 static int dac33_get_nsample(struct snd_kcontrol *kcontrol,
 363                          struct snd_ctl_elem_value *ucontrol)
 364 {
 365         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 366         struct tlv320dac33_priv *dac33 = codec->private_data;
 367
 368         ucontrol->value.integer.value[0] = dac33->nsample;
 369
 370         return 0;
 371 }
 372
 373 static int dac33_set_nsample(struct snd_kcontrol *kcontrol,
 374                          struct snd_ctl_elem_value *ucontrol)
 375 {
 376         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 377         struct tlv320dac33_priv *dac33 = codec->private_data;
 378         int ret = 0;
 379
 380         if (dac33->nsample == ucontrol->value.integer.value[0])
 381                 return 0;
 382
 383         if (ucontrol->value.integer.value[0] < dac33->nsample_min ||
 384             ucontrol->value.integer.value[0] > dac33->nsample_max)
 385                 ret = -EINVAL;
 386         else
 387                 dac33->nsample = ucontrol->value.integer.value[0];
 388
 389         return ret;
 390 }
 391
 392 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
 393                          struct snd_ctl_elem_value *ucontrol)
 394 {
 395         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 396         struct tlv320dac33_priv *dac33 = codec->private_data;
 397
 398         ucontrol->value.integer.value[0] = dac33->fifo_mode;
 399
 400         return 0;
 401 }
 402
 403 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
 404                          struct snd_ctl_elem_value *ucontrol)
 405 {
 406         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 407         struct tlv320dac33_priv *dac33 = codec->private_data;
 408         int ret = 0;
 409
 410         if (dac33->fifo_mode == ucontrol->value.integer.value[0])
 411                 return 0;
 412         /* Do not allow changes while stream is running*/
 413         if (codec->active)
 414                 return -EPERM;
 415
 416         if (ucontrol->value.integer.value[0] < 0 ||
 417             ucontrol->value.integer.value[0] >= DAC33_FIFO_LAST_MODE)
 418                 ret = -EINVAL;
 419         else
 420                 dac33->fifo_mode = ucontrol->value.integer.value[0];
 421
 422         return ret;
 423 }
 424
 425 /* Codec operation modes */
 426 static const char *dac33_fifo_mode_texts[] = {
 427         "Bypass", "Mode 1", "Mode 7"
 428 };
 429
 430 static const struct soc_enum dac33_fifo_mode_enum =
 431         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(dac33_fifo_mode_texts),
 432                             dac33_fifo_mode_texts);
 433
 434 /*
 435  * DACL/R digital volume control:
 436  * from 0 dB to -63.5 in 0.5 dB steps
 437  * Need to be inverted later on:
 438  * 0x00 == 0 dB
 439  * 0x7f == -63.5 dB
 440  */
 441 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
 442
 443 static const struct snd_kcontrol_new dac33_snd_controls[] = {
 444         SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
 445                 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
 446                 0, 0x7f, 1, dac_digivol_tlv),
 447         SOC_DOUBLE_R("DAC Digital Playback Switch",
 448                  DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
 449         SOC_DOUBLE_R("Line to Line Out Volume",
 450                  DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
 451 };
 452
 453 static const struct snd_kcontrol_new dac33_nsample_snd_controls[] = {
 454         SOC_SINGLE_EXT("nSample", 0, 0, 5900, 0,
 455                  dac33_get_nsample, dac33_set_nsample),
 456         SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
 457                  dac33_get_fifo_mode, dac33_set_fifo_mode),
 458 };
 459
 460 /* Analog bypass */
 461 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
 462         SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
 463
 464 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
 465         SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
 466
 467 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
 468         SND_SOC_DAPM_OUTPUT("LEFT_LO"),
 469         SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
 470
 471         SND_SOC_DAPM_INPUT("LINEL"),
 472         SND_SOC_DAPM_INPUT("LINER"),
 473
 474         SND_SOC_DAPM_DAC("DACL", "Left Playback", DAC33_LDAC_PWR_CTRL, 2, 0),
 475         SND_SOC_DAPM_DAC("DACR", "Right Playback", DAC33_RDAC_PWR_CTRL, 2, 0),
 476
 477         /* Analog bypass */
 478         SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
 479                                 &dac33_dapm_abypassl_control),
 480         SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
 481                                 &dac33_dapm_abypassr_control),
 482
 483         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amp Power",
 484                          DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
 485         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amp Power",
 486                          DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
 487 };
 488
 489 static const struct snd_soc_dapm_route audio_map[] = {
 490         /* Analog bypass */
 491         {"Analog Left Bypass", "Switch", "LINEL"},
 492         {"Analog Right Bypass", "Switch", "LINER"},
 493
 494         {"Output Left Amp Power", NULL, "DACL"},
 495         {"Output Right Amp Power", NULL, "DACR"},
 496
 497         {"Output Left Amp Power", NULL, "Analog Left Bypass"},
 498         {"Output Right Amp Power", NULL, "Analog Right Bypass"},
 499
 500         /* output */
 501         {"LEFT_LO", NULL, "Output Left Amp Power"},
 502         {"RIGHT_LO", NULL, "Output Right Amp Power"},
 503 };
 504
 505 static int dac33_add_widgets(struct snd_soc_codec *codec)
 506 {
 507         snd_soc_dapm_new_controls(codec, dac33_dapm_widgets,
 508                                   ARRAY_SIZE(dac33_dapm_widgets));
 509
 510         /* set up audio path interconnects */
 511         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 512
 513         return 0;
 514 }
 515
 516 static int dac33_set_bias_level(struct snd_soc_codec *codec,
 517                                 enum snd_soc_bias_level level)
 518 {
 519         int ret;
 520
 521         switch (level) {
 522         case SND_SOC_BIAS_ON:
 523                 dac33_soft_power(codec, 1);
 524                 break;
 525         case SND_SOC_BIAS_PREPARE:
 526                 break;
 527         case SND_SOC_BIAS_STANDBY:
 528                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 529                         ret = dac33_hard_power(codec, 1);
 530                         if (ret != 0)
 531                                 return ret;
 532                 }
 533
 534                 dac33_soft_power(codec, 0);
 535                 break;
 536         case SND_SOC_BIAS_OFF:
 537                 ret = dac33_hard_power(codec, 0);
 538                 if (ret != 0)
 539                         return ret;
 540
 541                 break;
 542         }
 543         codec->bias_level = level;
 544
 545         return 0;
 546 }
 547
 548 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
 549 {
 550         struct snd_soc_codec *codec;
 551
 552         codec = &dac33->codec;
 553
 554         switch (dac33->fifo_mode) {
 555         case DAC33_FIFO_MODE1:
 556                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
 557                                 DAC33_THRREG(dac33->nsample));
 558                 dac33_write16(codec, DAC33_PREFILL_MSB,
 559                                 DAC33_THRREG(dac33->alarm_threshold));
 560                 break;
 561         case DAC33_FIFO_MODE7:
 562                 dac33_write16(codec, DAC33_PREFILL_MSB,
 563                                 DAC33_THRREG(10));
 564                 break;
 565         default:
 566                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
 567                                                         dac33->fifo_mode);
 568                 break;
 569         }
 570 }
 571
 572 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
 573 {
 574         struct snd_soc_codec *codec;
 575
 576         codec = &dac33->codec;
 577
 578         switch (dac33->fifo_mode) {
 579         case DAC33_FIFO_MODE1:
 580                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
 581                                 DAC33_THRREG(dac33->nsample));
 582                 break;
 583         case DAC33_FIFO_MODE7:
 584                 /* At the moment we are not using interrupts in mode7 */
 585                 break;
 586         default:
 587                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
 588                                                         dac33->fifo_mode);
 589                 break;
 590         }
 591 }
 592
 593 static void dac33_work(struct work_struct *work)
 594 {
 595         struct snd_soc_codec *codec;
 596         struct tlv320dac33_priv *dac33;
 597         u8 reg;
 598
 599         dac33 = container_of(work, struct tlv320dac33_priv, work);
 600         codec = &dac33->codec;
 601
 602         mutex_lock(&dac33->mutex);
 603         switch (dac33->state) {
 604         case DAC33_PREFILL:
 605                 dac33->state = DAC33_PLAYBACK;
 606                 dac33_prefill_handler(dac33);
 607                 break;
 608         case DAC33_PLAYBACK:
 609                 dac33_playback_handler(dac33);
 610                 break;
 611         case DAC33_IDLE:
 612                 break;
 613         case DAC33_FLUSH:
 614                 dac33->state = DAC33_IDLE;
 615                 /* Mask all interrupts from dac33 */
 616                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
 617
 618                 /* flush fifo */
 619                 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
 620                 reg |= DAC33_FIFOFLUSH;
 621                 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
 622                 break;
 623         }
 624         mutex_unlock(&dac33->mutex);
 625 }
 626
 627 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
 628 {
 629         struct snd_soc_codec *codec = dev;
 630         struct tlv320dac33_priv *dac33 = codec->private_data;
 631
 632         queue_work(dac33->dac33_wq, &dac33->work);
 633
 634         return IRQ_HANDLED;
 635 }
 636
 637 static void dac33_shutdown(struct snd_pcm_substream *substream,
 638                              struct snd_soc_dai *dai)
 639 {
 640         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 641         struct snd_soc_device *socdev = rtd->socdev;
 642         struct snd_soc_codec *codec = socdev->card->codec;
 643         struct tlv320dac33_priv *dac33 = codec->private_data;
 644         unsigned int pwr_ctrl;
 645
 646         /* Stop pending workqueue */
 647         if (dac33->fifo_mode)
 648                 cancel_work_sync(&dac33->work);
 649
 650         mutex_lock(&dac33->mutex);
 651         pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
 652         pwr_ctrl &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB);
 653         dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
 654         mutex_unlock(&dac33->mutex);
 655 }
 656
 657 static void dac33_oscwait(struct snd_soc_codec *codec)
 658 {
 659         int timeout = 20;
 660         u8 reg;
 661
 662         do {
 663                 msleep(1);
 664                 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
 665         } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
 666         if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
 667                 dev_err(codec->dev,
 668                         "internal oscillator calibration failed\n");
 669 }
 670
 671 static int dac33_hw_params(struct snd_pcm_substream *substream,
 672                            struct snd_pcm_hw_params *params,
 673                            struct snd_soc_dai *dai)
 674 {
 675         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 676         struct snd_soc_device *socdev = rtd->socdev;
 677         struct snd_soc_codec *codec = socdev->card->codec;
 678
 679         /* Check parameters for validity */
 680         switch (params_rate(params)) {
 681         case 44100:
 682         case 48000:
 683                 break;
 684         default:
 685                 dev_err(codec->dev, "unsupported rate %d\n",
 686                         params_rate(params));
 687                 return -EINVAL;
 688         }
 689
 690         switch (params_format(params)) {
 691         case SNDRV_PCM_FORMAT_S16_LE:
 692                 break;
 693         default:
 694                 dev_err(codec->dev, "unsupported format %d\n",
 695                         params_format(params));
 696                 return -EINVAL;
 697         }
 698
 699         return 0;
 700 }
 701
 702 #define CALC_OSCSET(rate, refclk) ( \
 703         ((((rate * 10000) / refclk) * 4096) + 5000) / 10000)
 704 #define CALC_RATIOSET(rate, refclk) ( \
 705         ((((refclk  * 100000) / rate) * 16384) + 50000) / 100000)
 706
 707 /*
 708  * tlv320dac33 is strict on the sequence of the register writes, if the register
 709  * writes happens in different order, than dac33 might end up in unknown state.
 710  * Use the known, working sequence of register writes to initialize the dac33.
 711  */
 712 static int dac33_prepare_chip(struct snd_pcm_substream *substream)
 713 {
 714         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 715         struct snd_soc_device *socdev = rtd->socdev;
 716         struct snd_soc_codec *codec = socdev->card->codec;
 717         struct tlv320dac33_priv *dac33 = codec->private_data;
 718         unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
 719         u8 aictrl_a, aictrl_b, fifoctrl_a;
 720
 721         switch (substream->runtime->rate) {
 722         case 44100:
 723         case 48000:
 724                 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
 725                 ratioset = CALC_RATIOSET(substream->runtime->rate,
 726                                          dac33->refclk);
 727                 break;
 728         default:
 729                 dev_err(codec->dev, "unsupported rate %d\n",
 730                         substream->runtime->rate);
 731                 return -EINVAL;
 732         }
 733
 734
 735         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
 736         aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
 737         fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
 738         fifoctrl_a &= ~DAC33_WIDTH;
 739         switch (substream->runtime->format) {
 740         case SNDRV_PCM_FORMAT_S16_LE:
 741                 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
 742                 fifoctrl_a |= DAC33_WIDTH;
 743                 break;
 744         default:
 745                 dev_err(codec->dev, "unsupported format %d\n",
 746                         substream->runtime->format);
 747                 return -EINVAL;
 748         }
 749
 750         mutex_lock(&dac33->mutex);
 751         dac33_soft_power(codec, 1);
 752
 753         reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
 754         dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
 755
 756         /* Write registers 0x08 and 0x09 (MSB, LSB) */
 757         dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
 758
 759         /* calib time: 128 is a nice number ;) */
 760         dac33_write(codec, DAC33_CALIB_TIME, 128);
 761
 762         /* adjustment treshold & step */
 763         dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
 764                                                  DAC33_ADJSTEP(1));
 765
 766         /* div=4 / gain=1 / div */
 767         dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
 768
 769         pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
 770         pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
 771         dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
 772
 773         dac33_oscwait(codec);
 774
 775         if (dac33->fifo_mode) {
 776                 /* Generic for all FIFO modes */
 777                 /* 50-51 : ASRC Control registers */
 778                 dac33_write(codec, DAC33_ASRC_CTRL_A, (1 << 4)); /* div=2 */
 779                 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
 780
 781                 /* Write registers 0x34 and 0x35 (MSB, LSB) */
 782                 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
 783
 784                 /* Set interrupts to high active */
 785                 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
 786         } else {
 787                 /* FIFO bypass mode */
 788                 /* 50-51 : ASRC Control registers */
 789                 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
 790                 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
 791         }
 792
 793         /* Interrupt behaviour configuration */
 794         switch (dac33->fifo_mode) {
 795         case DAC33_FIFO_MODE1:
 796                 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
 797                             DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
 798                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
 799                 break;
 800         case DAC33_FIFO_MODE7:
 801                 /* Disable all interrupts */
 802                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
 803                 break;
 804         default:
 805                 /* in FIFO bypass mode, the interrupts are not used */
 806                 break;
 807         }
 808
 809         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
 810
 811         switch (dac33->fifo_mode) {
 812         case DAC33_FIFO_MODE1:
 813                 /*
 814                  * For mode1:
 815                  * Disable the FIFO bypass (Enable the use of FIFO)
 816                  * Select nSample mode
 817                  * BCLK is only running when data is needed by DAC33
 818                  */
 819                 fifoctrl_a &= ~DAC33_FBYPAS;
 820                 fifoctrl_a &= ~DAC33_FAUTO;
 821                 aictrl_b &= ~DAC33_BCLKON;
 822                 break;
 823         case DAC33_FIFO_MODE7:
 824                 /*
 825                  * For mode1:
 826                  * Disable the FIFO bypass (Enable the use of FIFO)
 827                  * Select Threshold mode
 828                  * BCLK is only running when data is needed by DAC33
 829                  */
 830                 fifoctrl_a &= ~DAC33_FBYPAS;
 831                 fifoctrl_a |= DAC33_FAUTO;
 832                 aictrl_b &= ~DAC33_BCLKON;
 833                 break;
 834         default:
 835                 /*
 836                  * For FIFO bypass mode:
 837                  * Enable the FIFO bypass (Disable the FIFO use)
 838                  * Set the BCLK as continous
 839                  */
 840                 fifoctrl_a |= DAC33_FBYPAS;
 841                 aictrl_b |= DAC33_BCLKON;
 842                 break;
 843         }
 844
 845         dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
 846         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
 847         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
 848
 849         /*
 850          * BCLK divide ratio
 851          * 0: 1.5
 852          * 1: 1
 853          * 2: 2
 854          * ...
 855          * 254: 254
 856          * 255: 255
 857          */
 858         if (dac33->fifo_mode)
 859                 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
 860                                                         dac33->burst_bclkdiv);
 861         else
 862                 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
 863
 864         switch (dac33->fifo_mode) {
 865         case DAC33_FIFO_MODE1:
 866                 dac33_write16(codec, DAC33_ATHR_MSB,
 867                               DAC33_THRREG(dac33->alarm_threshold));
 868                 break;
 869         case DAC33_FIFO_MODE7:
 870                 /*
 871                  * Configure the threshold levels, and leave 10 sample space
 872                  * at the bottom, and also at the top of the FIFO
 873                  */
 874                 dac33_write16(codec, DAC33_UTHR_MSB,
 875                         DAC33_THRREG(DAC33_BUFFER_SIZE_SAMPLES - 10));
 876                 dac33_write16(codec, DAC33_LTHR_MSB,
 877                         DAC33_THRREG(10));
 878                 break;
 879         default:
 880                 break;
 881         }
 882
 883         mutex_unlock(&dac33->mutex);
 884
 885         return 0;
 886 }
 887
 888 static void dac33_calculate_times(struct snd_pcm_substream *substream)
 889 {
 890         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 891         struct snd_soc_device *socdev = rtd->socdev;
 892         struct snd_soc_codec *codec = socdev->card->codec;
 893         struct tlv320dac33_priv *dac33 = codec->private_data;
 894         unsigned int nsample_limit;
 895
 896         /* Number of samples (16bit, stereo) in one period */
 897         dac33->nsample_min = snd_pcm_lib_period_bytes(substream) / 4;
 898
 899         /* Number of samples (16bit, stereo) in ALSA buffer */
 900         dac33->nsample_max = snd_pcm_lib_buffer_bytes(substream) / 4;
 901         /* Subtract one period from the total */
 902         dac33->nsample_max -= dac33->nsample_min;
 903
 904         /* Number of samples for LATENCY_TIME_MS / 2 */
 905         dac33->alarm_threshold = substream->runtime->rate /
 906                                  (1000 / (LATENCY_TIME_MS / 2));
 907
 908         /* Find and fix up the lowest nsmaple limit */
 909         nsample_limit = substream->runtime->rate / (1000 / LATENCY_TIME_MS);
 910
 911         if (dac33->nsample_min < nsample_limit)
 912                 dac33->nsample_min = nsample_limit;
 913
 914         if (dac33->nsample < dac33->nsample_min)
 915                 dac33->nsample = dac33->nsample_min;
 916
 917         /*
 918          * Find and fix up the highest nsmaple limit
 919          * In order to not overflow the DAC33 buffer substract the
 920          * alarm_threshold value from the size of the DAC33 buffer
 921          */
 922         nsample_limit = DAC33_BUFFER_SIZE_SAMPLES - dac33->alarm_threshold;
 923
 924         if (dac33->nsample_max > nsample_limit)
 925                 dac33->nsample_max = nsample_limit;
 926
 927         if (dac33->nsample > dac33->nsample_max)
 928                 dac33->nsample = dac33->nsample_max;
 929 }
 930
 931 static int dac33_pcm_prepare(struct snd_pcm_substream *substream,
 932                              struct snd_soc_dai *dai)
 933 {
 934         dac33_calculate_times(substream);
 935         dac33_prepare_chip(substream);
 936
 937         return 0;
 938 }
 939
 940 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
 941                              struct snd_soc_dai *dai)
 942 {
 943         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 944         struct snd_soc_device *socdev = rtd->socdev;
 945         struct snd_soc_codec *codec = socdev->card->codec;
 946         struct tlv320dac33_priv *dac33 = codec->private_data;
 947         int ret = 0;
 948
 949         switch (cmd) {
 950         case SNDRV_PCM_TRIGGER_START:
 951         case SNDRV_PCM_TRIGGER_RESUME:
 952         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 953                 if (dac33->fifo_mode) {
 954                         dac33->state = DAC33_PREFILL;
 955                         queue_work(dac33->dac33_wq, &dac33->work);
 956                 }
 957                 break;
 958         case SNDRV_PCM_TRIGGER_STOP:
 959         case SNDRV_PCM_TRIGGER_SUSPEND:
 960         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 961                 if (dac33->fifo_mode) {
 962                         dac33->state = DAC33_FLUSH;
 963                         queue_work(dac33->dac33_wq, &dac33->work);
 964                 }
 965                 break;
 966         default:
 967                 ret = -EINVAL;
 968         }
 969
 970         return ret;
 971 }
 972
 973 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 974                 int clk_id, unsigned int freq, int dir)
 975 {
 976         struct snd_soc_codec *codec = codec_dai->codec;
 977         struct tlv320dac33_priv *dac33 = codec->private_data;
 978         u8 ioc_reg, asrcb_reg;
 979
 980         ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
 981         asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
 982         switch (clk_id) {
 983         case TLV320DAC33_MCLK:
 984                 ioc_reg |= DAC33_REFSEL;
 985                 asrcb_reg |= DAC33_SRCREFSEL;
 986                 break;
 987         case TLV320DAC33_SLEEPCLK:
 988                 ioc_reg &= ~DAC33_REFSEL;
 989                 asrcb_reg &= ~DAC33_SRCREFSEL;
 990                 break;
 991         default:
 992                 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
 993                 break;
 994         }
 995         dac33->refclk = freq;
 996
 997         dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
 998         dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
 999
1000         return 0;
1001 }
1002
1003 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1004                              unsigned int fmt)
1005 {
1006         struct snd_soc_codec *codec = codec_dai->codec;
1007         struct tlv320dac33_priv *dac33 = codec->private_data;
1008         u8 aictrl_a, aictrl_b;
1009
1010         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1011         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1012         /* set master/slave audio interface */
1013         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1014         case SND_SOC_DAIFMT_CBM_CFM:
1015                 /* Codec Master */
1016                 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1017                 break;
1018         case SND_SOC_DAIFMT_CBS_CFS:
1019                 /* Codec Slave */
1020                 if (dac33->fifo_mode) {
1021                         dev_err(codec->dev, "FIFO mode requires master mode\n");
1022                         return -EINVAL;
1023                 } else
1024                         aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1025                 break;
1026         default:
1027                 return -EINVAL;
1028         }
1029
1030         aictrl_a &= ~DAC33_AFMT_MASK;
1031         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1032         case SND_SOC_DAIFMT_I2S:
1033                 aictrl_a |= DAC33_AFMT_I2S;
1034                 break;
1035         case SND_SOC_DAIFMT_DSP_A:
1036                 aictrl_a |= DAC33_AFMT_DSP;
1037                 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1038                 aictrl_b |= DAC33_DATA_DELAY(1); /* 1 bit delay */
1039                 break;
1040         case SND_SOC_DAIFMT_DSP_B:
1041                 aictrl_a |= DAC33_AFMT_DSP;
1042                 aictrl_b &= ~DAC33_DATA_DELAY_MASK; /* No delay */
1043                 break;
1044         case SND_SOC_DAIFMT_RIGHT_J:
1045                 aictrl_a |= DAC33_AFMT_RIGHT_J;
1046                 break;
1047         case SND_SOC_DAIFMT_LEFT_J:
1048                 aictrl_a |= DAC33_AFMT_LEFT_J;
1049                 break;
1050         default:
1051                 dev_err(codec->dev, "Unsupported format (%u)\n",
1052                         fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1053                 return -EINVAL;
1054         }
1055
1056         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1057         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1058
1059         return 0;
1060 }
1061
1062 static void dac33_init_chip(struct snd_soc_codec *codec)
1063 {
1064         /* 44-46: DAC Control Registers */
1065         /* A : DAC sample rate Fsref/1.5 */
1066         dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(1));
1067         /* B : DAC src=normal, not muted */
1068         dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
1069                                              DAC33_DACSRCL_LEFT);
1070         /* C : (defaults) */
1071         dac33_write(codec, DAC33_DAC_CTRL_C, 0x00);
1072
1073         /* 64-65 : L&R DAC power control
1074          Line In -> OUT 1V/V Gain, DAC -> OUT 4V/V Gain*/
1075         dac33_write(codec, DAC33_LDAC_PWR_CTRL, DAC33_LROUT_GAIN(2));
1076         dac33_write(codec, DAC33_RDAC_PWR_CTRL, DAC33_LROUT_GAIN(2));
1077
1078         /* 73 : volume soft stepping control,
1079          clock source = internal osc (?) */
1080         dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
1081
1082         /* 66 : LOP/LOM Modes */
1083         dac33_write(codec, DAC33_OUT_AMP_CM_CTRL, 0xff);
1084
1085         /* 68 : LOM inverted from LOP */
1086         dac33_write(codec, DAC33_OUT_AMP_CTRL, (3<<2));
1087
1088         dac33_write(codec, DAC33_PWR_CTRL, DAC33_PDNALLB);
1089 }
1090
1091 static int dac33_soc_probe(struct platform_device *pdev)
1092 {
1093         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1094         struct snd_soc_codec *codec;
1095         struct tlv320dac33_priv *dac33;
1096         int ret = 0;
1097
1098         BUG_ON(!tlv320dac33_codec);
1099
1100         codec = tlv320dac33_codec;
1101         socdev->card->codec = codec;
1102         dac33 = codec->private_data;
1103
1104         /* Power up the codec */
1105         dac33_hard_power(codec, 1);
1106         /* Set default configuration */
1107         dac33_init_chip(codec);
1108
1109         /* register pcms */
1110         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
1111         if (ret < 0) {
1112                 dev_err(codec->dev, "failed to create pcms\n");
1113                 goto pcm_err;
1114         }
1115
1116         snd_soc_add_controls(codec, dac33_snd_controls,
1117                              ARRAY_SIZE(dac33_snd_controls));
1118         /* Only add the nSample controls, if we have valid IRQ number */
1119         if (dac33->irq >= 0)
1120                 snd_soc_add_controls(codec, dac33_nsample_snd_controls,
1121                                      ARRAY_SIZE(dac33_nsample_snd_controls));
1122
1123         dac33_add_widgets(codec);
1124
1125         /* power on device */
1126         dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1127
1128         /* Bias level configuration has enabled regulator an extra time */
1129         regulator_bulk_disable(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1130
1131         return 0;
1132
1133 pcm_err:
1134         dac33_hard_power(codec, 0);
1135         return ret;
1136 }
1137
1138 static int dac33_soc_remove(struct platform_device *pdev)
1139 {
1140         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1141         struct snd_soc_codec *codec = socdev->card->codec;
1142
1143         dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1144
1145         snd_soc_free_pcms(socdev);
1146         snd_soc_dapm_free(socdev);
1147
1148         return 0;
1149 }
1150
1151 static int dac33_soc_suspend(struct platform_device *pdev, pm_message_t state)
1152 {
1153         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1154         struct snd_soc_codec *codec = socdev->card->codec;
1155
1156         dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1157
1158         return 0;
1159 }
1160
1161 static int dac33_soc_resume(struct platform_device *pdev)
1162 {
1163         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1164         struct snd_soc_codec *codec = socdev->card->codec;
1165
1166         dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1167         dac33_set_bias_level(codec, codec->suspend_bias_level);
1168
1169         return 0;
1170 }
1171
1172 struct snd_soc_codec_device soc_codec_dev_tlv320dac33 = {
1173         .probe = dac33_soc_probe,
1174         .remove = dac33_soc_remove,
1175         .suspend = dac33_soc_suspend,
1176         .resume = dac33_soc_resume,
1177 };
1178 EXPORT_SYMBOL_GPL(soc_codec_dev_tlv320dac33);
1179
1180 #define DAC33_RATES     (SNDRV_PCM_RATE_44100 | \
1181                          SNDRV_PCM_RATE_48000)
1182 #define DAC33_FORMATS   SNDRV_PCM_FMTBIT_S16_LE
1183
1184 static struct snd_soc_dai_ops dac33_dai_ops = {
1185         .shutdown       = dac33_shutdown,
1186         .hw_params      = dac33_hw_params,
1187         .prepare        = dac33_pcm_prepare,
1188         .trigger        = dac33_pcm_trigger,
1189         .set_sysclk     = dac33_set_dai_sysclk,
1190         .set_fmt        = dac33_set_dai_fmt,
1191 };
1192
1193 struct snd_soc_dai dac33_dai = {
1194         .name = "tlv320dac33",
1195         .playback = {
1196                 .stream_name = "Playback",
1197                 .channels_min = 2,
1198                 .channels_max = 2,
1199                 .rates = DAC33_RATES,
1200                 .formats = DAC33_FORMATS,},
1201         .ops = &dac33_dai_ops,
1202 };
1203 EXPORT_SYMBOL_GPL(dac33_dai);
1204
1205 static int __devinit dac33_i2c_probe(struct i2c_client *client,
1206                                      const struct i2c_device_id *id)
1207 {
1208         struct tlv320dac33_platform_data *pdata;
1209         struct tlv320dac33_priv *dac33;
1210         struct snd_soc_codec *codec;
1211         int ret, i;
1212
1213         if (client->dev.platform_data == NULL) {
1214                 dev_err(&client->dev, "Platform data not set\n");
1215                 return -ENODEV;
1216         }
1217         pdata = client->dev.platform_data;
1218
1219         dac33 = kzalloc(sizeof(struct tlv320dac33_priv), GFP_KERNEL);
1220         if (dac33 == NULL)
1221                 return -ENOMEM;
1222
1223         codec = &dac33->codec;
1224         codec->private_data = dac33;
1225         codec->control_data = client;
1226
1227         mutex_init(&codec->mutex);
1228         mutex_init(&dac33->mutex);
1229         INIT_LIST_HEAD(&codec->dapm_widgets);
1230         INIT_LIST_HEAD(&codec->dapm_paths);
1231
1232         codec->name = "tlv320dac33";
1233         codec->owner = THIS_MODULE;
1234         codec->read = dac33_read_reg_cache;
1235         codec->write = dac33_write_locked;
1236         codec->hw_write = (hw_write_t) i2c_master_send;
1237         codec->bias_level = SND_SOC_BIAS_OFF;
1238         codec->set_bias_level = dac33_set_bias_level;
1239         codec->dai = &dac33_dai;
1240         codec->num_dai = 1;
1241         codec->reg_cache_size = ARRAY_SIZE(dac33_reg);
1242         codec->reg_cache = kmemdup(dac33_reg, ARRAY_SIZE(dac33_reg),
1243                                    GFP_KERNEL);
1244         if (codec->reg_cache == NULL) {
1245                 ret = -ENOMEM;
1246                 goto error_reg;
1247         }
1248
1249         i2c_set_clientdata(client, dac33);
1250
1251         dac33->power_gpio = pdata->power_gpio;
1252         dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1253         dac33->irq = client->irq;
1254         dac33->nsample = NSAMPLE_MAX;
1255         /* Disable FIFO use by default */
1256         dac33->fifo_mode = DAC33_FIFO_BYPASS;
1257
1258         tlv320dac33_codec = codec;
1259
1260         codec->dev = &client->dev;
1261         dac33_dai.dev = codec->dev;
1262
1263         /* Check if the reset GPIO number is valid and request it */
1264         if (dac33->power_gpio >= 0) {
1265                 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1266                 if (ret < 0) {
1267                         dev_err(codec->dev,
1268                                 "Failed to request reset GPIO (%d)\n",
1269                                 dac33->power_gpio);
1270                         snd_soc_unregister_dai(&dac33_dai);
1271                         snd_soc_unregister_codec(codec);
1272                         goto error_gpio;
1273                 }
1274                 gpio_direction_output(dac33->power_gpio, 0);
1275         } else {
1276                 dac33->chip_power = 1;
1277         }
1278
1279         /* Check if the IRQ number is valid and request it */
1280         if (dac33->irq >= 0) {
1281                 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1282                                   IRQF_TRIGGER_RISING | IRQF_DISABLED,
1283                                   codec->name, codec);
1284                 if (ret < 0) {
1285                         dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1286                                                 dac33->irq, ret);
1287                         dac33->irq = -1;
1288                 }
1289                 if (dac33->irq != -1) {
1290                         /* Setup work queue */
1291                         dac33->dac33_wq =
1292                                 create_singlethread_workqueue("tlv320dac33");
1293                         if (dac33->dac33_wq == NULL) {
1294                                 free_irq(dac33->irq, &dac33->codec);
1295                                 ret = -ENOMEM;
1296                                 goto error_wq;
1297                         }
1298
1299                         INIT_WORK(&dac33->work, dac33_work);
1300                 }
1301         }
1302
1303         for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1304                 dac33->supplies[i].supply = dac33_supply_names[i];
1305
1306         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(dac33->supplies),
1307                                  dac33->supplies);
1308
1309         if (ret != 0) {
1310                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
1311                 goto err_get;
1312         }
1313
1314         ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
1315                                     dac33->supplies);
1316         if (ret != 0) {
1317                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
1318                 goto err_enable;
1319         }
1320
1321         ret = snd_soc_register_codec(codec);
1322         if (ret != 0) {
1323                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
1324                 goto error_codec;
1325         }
1326
1327         ret = snd_soc_register_dai(&dac33_dai);
1328         if (ret != 0) {
1329                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
1330                 snd_soc_unregister_codec(codec);
1331                 goto error_codec;
1332         }
1333
1334         /* Shut down the codec for now */
1335         dac33_hard_power(codec, 0);
1336
1337         return ret;
1338
1339 error_codec:
1340         regulator_bulk_disable(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1341 err_enable:
1342         regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1343 err_get:
1344         if (dac33->irq >= 0) {
1345                 free_irq(dac33->irq, &dac33->codec);
1346                 destroy_workqueue(dac33->dac33_wq);
1347         }
1348 error_wq:
1349         if (dac33->power_gpio >= 0)
1350                 gpio_free(dac33->power_gpio);
1351 error_gpio:
1352         kfree(codec->reg_cache);
1353 error_reg:
1354         tlv320dac33_codec = NULL;
1355         kfree(dac33);
1356
1357         return ret;
1358 }
1359
1360 static int __devexit dac33_i2c_remove(struct i2c_client *client)
1361 {
1362         struct tlv320dac33_priv *dac33;
1363
1364         dac33 = i2c_get_clientdata(client);
1365         dac33_hard_power(&dac33->codec, 0);
1366
1367         if (dac33->power_gpio >= 0)
1368                 gpio_free(dac33->power_gpio);
1369         if (dac33->irq >= 0)
1370                 free_irq(dac33->irq, &dac33->codec);
1371
1372         regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1373
1374         destroy_workqueue(dac33->dac33_wq);
1375         snd_soc_unregister_dai(&dac33_dai);
1376         snd_soc_unregister_codec(&dac33->codec);
1377         kfree(dac33->codec.reg_cache);
1378         kfree(dac33);
1379         tlv320dac33_codec = NULL;
1380
1381         return 0;
1382 }
1383
1384 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1385         {
1386                 .name = "tlv320dac33",
1387                 .driver_data = 0,
1388         },
1389         { },
1390 };
1391
1392 static struct i2c_driver tlv320dac33_i2c_driver = {
1393         .driver = {
1394                 .name = "tlv320dac33",
1395                 .owner = THIS_MODULE,
1396         },
1397         .probe          = dac33_i2c_probe,
1398         .remove         = __devexit_p(dac33_i2c_remove),
1399         .id_table       = tlv320dac33_i2c_id,
1400 };
1401
1402 static int __init dac33_module_init(void)
1403 {
1404         int r;
1405         r = i2c_add_driver(&tlv320dac33_i2c_driver);
1406         if (r < 0) {
1407                 printk(KERN_ERR "DAC33: driver registration failed\n");
1408                 return r;
1409         }
1410         return 0;
1411 }
1412 module_init(dac33_module_init);
1413
1414 static void __exit dac33_module_exit(void)
1415 {
1416         i2c_del_driver(&tlv320dac33_i2c_driver);
1417 }
1418 module_exit(dac33_module_exit);
1419
1420
1421 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1422 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
1423 MODULE_LICENSE("GPL");