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 <linux/slab.h>
  35 #include <sound/core.h>
  36 #include <sound/pcm.h>
  37 #include <sound/pcm_params.h>
  38 #include <sound/soc.h>
  39 #include <sound/soc-dapm.h>
  40 #include <sound/initval.h>
  41 #include <sound/tlv.h>
  42
  43 #include <sound/tlv320dac33-plat.h>
  44 #include "tlv320dac33.h"
  45
  46 #define DAC33_BUFFER_SIZE_BYTES         24576   /* bytes, 12288 16 bit words,
  47                                                  * 6144 stereo */
  48 #define DAC33_BUFFER_SIZE_SAMPLES       6144
  49
  50 #define NSAMPLE_MAX             5700
  51
  52 #define MODE7_LTHR              10
  53 #define MODE7_UTHR              (DAC33_BUFFER_SIZE_SAMPLES - 10)
  54
  55 #define BURST_BASEFREQ_HZ       49152000
  56
  57 #define SAMPLES_TO_US(rate, samples) \
  58         (1000000000 / ((rate * 1000) / samples))
  59
  60 #define US_TO_SAMPLES(rate, us) \
  61         (rate / (1000000 / (us < 1000000 ? us : 1000000)))
  62
  63 #define UTHR_FROM_PERIOD_SIZE(samples, playrate, burstrate) \
  64         ((samples * 5000) / ((burstrate * 5000) / (burstrate - playrate)))
  65
  66 static void dac33_calculate_times(struct snd_pcm_substream *substream);
  67 static int dac33_prepare_chip(struct snd_pcm_substream *substream);
  68
  69 enum dac33_state {
  70         DAC33_IDLE = 0,
  71         DAC33_PREFILL,
  72         DAC33_PLAYBACK,
  73         DAC33_FLUSH,
  74 };
  75
  76 enum dac33_fifo_modes {
  77         DAC33_FIFO_BYPASS = 0,
  78         DAC33_FIFO_MODE1,
  79         DAC33_FIFO_MODE7,
  80         DAC33_FIFO_LAST_MODE,
  81 };
  82
  83 #define DAC33_NUM_SUPPLIES 3
  84 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
  85         "AVDD",
  86         "DVDD",
  87         "IOVDD",
  88 };
  89
  90 struct tlv320dac33_priv {
  91         struct mutex mutex;
  92         struct workqueue_struct *dac33_wq;
  93         struct work_struct work;
  94         struct snd_soc_codec *codec;
  95         struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
  96         struct snd_pcm_substream *substream;
  97         int power_gpio;
  98         int chip_power;
  99         int irq;
 100         unsigned int refclk;
 101
 102         unsigned int alarm_threshold;   /* set to be half of LATENCY_TIME_MS */
 103         unsigned int nsample_min;       /* nsample should not be lower than
 104                                          * this */
 105         unsigned int nsample_max;       /* nsample should not be higher than
 106                                          * this */
 107         enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
 108         unsigned int nsample;           /* burst read amount from host */
 109         int mode1_latency;              /* latency caused by the i2c writes in
 110                                          * us */
 111         int auto_fifo_config;           /* Configure the FIFO based on the
 112                                          * period size */
 113         u8 burst_bclkdiv;               /* BCLK divider value in burst mode */
 114         unsigned int burst_rate;        /* Interface speed in Burst modes */
 115
 116         int keep_bclk;                  /* Keep the BCLK continuously running
 117                                          * in FIFO modes */
 118         spinlock_t lock;
 119         unsigned long long t_stamp1;    /* Time stamp for FIFO modes to */
 120         unsigned long long t_stamp2;    /* calculate the FIFO caused delay */
 121
 122         unsigned int mode1_us_burst;    /* Time to burst read n number of
 123                                          * samples */
 124         unsigned int mode7_us_to_lthr;  /* Time to reach lthr from uthr */
 125
 126         unsigned int uthr;
 127
 128         enum dac33_state state;
 129         enum snd_soc_control_type control_type;
 130         void *control_data;
 131 };
 132
 133 static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
 134 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
 135 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
 136 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
 137 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
 138 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
 139 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
 140 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
 141 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
 142 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
 143 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
 144 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
 145 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
 146 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
 147 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
 148 0x00, 0x00,             /* 0x38 - 0x39 */
 149 /* Registers 0x3a - 0x3f are reserved  */
 150             0x00, 0x00, /* 0x3a - 0x3b */
 151 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
 152
 153 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
 154 0x00, 0x80,             /* 0x44 - 0x45 */
 155 /* Registers 0x46 - 0x47 are reserved  */
 156             0x80, 0x80, /* 0x46 - 0x47 */
 157
 158 0x80, 0x00, 0x00,       /* 0x48 - 0x4a */
 159 /* Registers 0x4b - 0x7c are reserved  */
 160                   0x00, /* 0x4b        */
 161 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
 162 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
 163 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
 164 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
 165 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
 166 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
 167 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
 168 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
 169 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
 170 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
 171 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
 172 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
 173 0x00,                   /* 0x7c        */
 174
 175       0xda, 0x33, 0x03, /* 0x7d - 0x7f */
 176 };
 177
 178 /* Register read and write */
 179 static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
 180                                                 unsigned reg)
 181 {
 182         u8 *cache = codec->reg_cache;
 183         if (reg >= DAC33_CACHEREGNUM)
 184                 return 0;
 185
 186         return cache[reg];
 187 }
 188
 189 static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
 190                                          u8 reg, u8 value)
 191 {
 192         u8 *cache = codec->reg_cache;
 193         if (reg >= DAC33_CACHEREGNUM)
 194                 return;
 195
 196         cache[reg] = value;
 197 }
 198
 199 static int dac33_read(struct snd_soc_codec *codec, unsigned int reg,
 200                       u8 *value)
 201 {
 202         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 203         int val, ret = 0;
 204
 205         *value = reg & 0xff;
 206
 207         /* If powered off, return the cached value */
 208         if (dac33->chip_power) {
 209                 val = i2c_smbus_read_byte_data(codec->control_data, value[0]);
 210                 if (val < 0) {
 211                         dev_err(codec->dev, "Read failed (%d)\n", val);
 212                         value[0] = dac33_read_reg_cache(codec, reg);
 213                         ret = val;
 214                 } else {
 215                         value[0] = val;
 216                         dac33_write_reg_cache(codec, reg, val);
 217                 }
 218         } else {
 219                 value[0] = dac33_read_reg_cache(codec, reg);
 220         }
 221
 222         return ret;
 223 }
 224
 225 static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
 226                        unsigned int value)
 227 {
 228         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 229         u8 data[2];
 230         int ret = 0;
 231
 232         /*
 233          * data is
 234          *   D15..D8 dac33 register offset
 235          *   D7...D0 register data
 236          */
 237         data[0] = reg & 0xff;
 238         data[1] = value & 0xff;
 239
 240         dac33_write_reg_cache(codec, data[0], data[1]);
 241         if (dac33->chip_power) {
 242                 ret = codec->hw_write(codec->control_data, data, 2);
 243                 if (ret != 2)
 244                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 245                 else
 246                         ret = 0;
 247         }
 248
 249         return ret;
 250 }
 251
 252 static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
 253                        unsigned int value)
 254 {
 255         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 256         int ret;
 257
 258         mutex_lock(&dac33->mutex);
 259         ret = dac33_write(codec, reg, value);
 260         mutex_unlock(&dac33->mutex);
 261
 262         return ret;
 263 }
 264
 265 #define DAC33_I2C_ADDR_AUTOINC  0x80
 266 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
 267                        unsigned int value)
 268 {
 269         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 270         u8 data[3];
 271         int ret = 0;
 272
 273         /*
 274          * data is
 275          *   D23..D16 dac33 register offset
 276          *   D15..D8  register data MSB
 277          *   D7...D0  register data LSB
 278          */
 279         data[0] = reg & 0xff;
 280         data[1] = (value >> 8) & 0xff;
 281         data[2] = value & 0xff;
 282
 283         dac33_write_reg_cache(codec, data[0], data[1]);
 284         dac33_write_reg_cache(codec, data[0] + 1, data[2]);
 285
 286         if (dac33->chip_power) {
 287                 /* We need to set autoincrement mode for 16 bit writes */
 288                 data[0] |= DAC33_I2C_ADDR_AUTOINC;
 289                 ret = codec->hw_write(codec->control_data, data, 3);
 290                 if (ret != 3)
 291                         dev_err(codec->dev, "Write failed (%d)\n", ret);
 292                 else
 293                         ret = 0;
 294         }
 295
 296         return ret;
 297 }
 298
 299 static void dac33_init_chip(struct snd_soc_codec *codec)
 300 {
 301         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 302
 303         if (unlikely(!dac33->chip_power))
 304                 return;
 305
 306         /* 44-46: DAC Control Registers */
 307         /* A : DAC sample rate Fsref/1.5 */
 308         dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(0));
 309         /* B : DAC src=normal, not muted */
 310         dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
 311                                              DAC33_DACSRCL_LEFT);
 312         /* C : (defaults) */
 313         dac33_write(codec, DAC33_DAC_CTRL_C, 0x00);
 314
 315         /* 73 : volume soft stepping control,
 316          clock source = internal osc (?) */
 317         dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
 318
 319         dac33_write(codec, DAC33_PWR_CTRL, DAC33_PDNALLB);
 320
 321         /* Restore only selected registers (gains mostly) */
 322         dac33_write(codec, DAC33_LDAC_DIG_VOL_CTRL,
 323                     dac33_read_reg_cache(codec, DAC33_LDAC_DIG_VOL_CTRL));
 324         dac33_write(codec, DAC33_RDAC_DIG_VOL_CTRL,
 325                     dac33_read_reg_cache(codec, DAC33_RDAC_DIG_VOL_CTRL));
 326
 327         dac33_write(codec, DAC33_LINEL_TO_LLO_VOL,
 328                     dac33_read_reg_cache(codec, DAC33_LINEL_TO_LLO_VOL));
 329         dac33_write(codec, DAC33_LINER_TO_RLO_VOL,
 330                     dac33_read_reg_cache(codec, DAC33_LINER_TO_RLO_VOL));
 331 }
 332
 333 static inline int dac33_read_id(struct snd_soc_codec *codec)
 334 {
 335         int i, ret = 0;
 336         u8 reg;
 337
 338         for (i = 0; i < 3; i++) {
 339                 ret = dac33_read(codec, DAC33_DEVICE_ID_MSB + i, &reg);
 340                 if (ret < 0)
 341                         break;
 342         }
 343
 344         return ret;
 345 }
 346
 347 static inline void dac33_soft_power(struct snd_soc_codec *codec, int power)
 348 {
 349         u8 reg;
 350
 351         reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
 352         if (power)
 353                 reg |= DAC33_PDNALLB;
 354         else
 355                 reg &= ~(DAC33_PDNALLB | DAC33_OSCPDNB |
 356                          DAC33_DACRPDNB | DAC33_DACLPDNB);
 357         dac33_write(codec, DAC33_PWR_CTRL, reg);
 358 }
 359
 360 static int dac33_hard_power(struct snd_soc_codec *codec, int power)
 361 {
 362         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 363         int ret = 0;
 364
 365         mutex_lock(&dac33->mutex);
 366
 367         /* Safety check */
 368         if (unlikely(power == dac33->chip_power)) {
 369                 dev_dbg(codec->dev, "Trying to set the same power state: %s\n",
 370                         power ? "ON" : "OFF");
 371                 goto exit;
 372         }
 373
 374         if (power) {
 375                 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
 376                                           dac33->supplies);
 377                 if (ret != 0) {
 378                         dev_err(codec->dev,
 379                                 "Failed to enable supplies: %d\n", ret);
 380                                 goto exit;
 381                 }
 382
 383                 if (dac33->power_gpio >= 0)
 384                         gpio_set_value(dac33->power_gpio, 1);
 385
 386                 dac33->chip_power = 1;
 387         } else {
 388                 dac33_soft_power(codec, 0);
 389                 if (dac33->power_gpio >= 0)
 390                         gpio_set_value(dac33->power_gpio, 0);
 391
 392                 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
 393                                              dac33->supplies);
 394                 if (ret != 0) {
 395                         dev_err(codec->dev,
 396                                 "Failed to disable supplies: %d\n", ret);
 397                         goto exit;
 398                 }
 399
 400                 dac33->chip_power = 0;
 401         }
 402
 403 exit:
 404         mutex_unlock(&dac33->mutex);
 405         return ret;
 406 }
 407
 408 static int playback_event(struct snd_soc_dapm_widget *w,
 409                 struct snd_kcontrol *kcontrol, int event)
 410 {
 411         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(w->codec);
 412
 413         switch (event) {
 414         case SND_SOC_DAPM_PRE_PMU:
 415                 if (likely(dac33->substream)) {
 416                         dac33_calculate_times(dac33->substream);
 417                         dac33_prepare_chip(dac33->substream);
 418                 }
 419                 break;
 420         }
 421         return 0;
 422 }
 423
 424 static int dac33_get_nsample(struct snd_kcontrol *kcontrol,
 425                          struct snd_ctl_elem_value *ucontrol)
 426 {
 427         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 428         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 429
 430         ucontrol->value.integer.value[0] = dac33->nsample;
 431
 432         return 0;
 433 }
 434
 435 static int dac33_set_nsample(struct snd_kcontrol *kcontrol,
 436                          struct snd_ctl_elem_value *ucontrol)
 437 {
 438         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 439         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 440         int ret = 0;
 441
 442         if (dac33->nsample == ucontrol->value.integer.value[0])
 443                 return 0;
 444
 445         if (ucontrol->value.integer.value[0] < dac33->nsample_min ||
 446             ucontrol->value.integer.value[0] > dac33->nsample_max) {
 447                 ret = -EINVAL;
 448         } else {
 449                 dac33->nsample = ucontrol->value.integer.value[0];
 450                 /* Re calculate the burst time */
 451                 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
 452                                                       dac33->nsample);
 453         }
 454
 455         return ret;
 456 }
 457
 458 static int dac33_get_uthr(struct snd_kcontrol *kcontrol,
 459                          struct snd_ctl_elem_value *ucontrol)
 460 {
 461         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 462         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 463
 464         ucontrol->value.integer.value[0] = dac33->uthr;
 465
 466         return 0;
 467 }
 468
 469 static int dac33_set_uthr(struct snd_kcontrol *kcontrol,
 470                          struct snd_ctl_elem_value *ucontrol)
 471 {
 472         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 473         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 474         int ret = 0;
 475
 476         if (dac33->substream)
 477                 return -EBUSY;
 478
 479         if (dac33->uthr == ucontrol->value.integer.value[0])
 480                 return 0;
 481
 482         if (ucontrol->value.integer.value[0] < (MODE7_LTHR + 10) ||
 483             ucontrol->value.integer.value[0] > MODE7_UTHR)
 484                 ret = -EINVAL;
 485         else
 486                 dac33->uthr = ucontrol->value.integer.value[0];
 487
 488         return ret;
 489 }
 490
 491 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
 492                          struct snd_ctl_elem_value *ucontrol)
 493 {
 494         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 495         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 496
 497         ucontrol->value.integer.value[0] = dac33->fifo_mode;
 498
 499         return 0;
 500 }
 501
 502 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
 503                          struct snd_ctl_elem_value *ucontrol)
 504 {
 505         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 506         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 507         int ret = 0;
 508
 509         if (dac33->fifo_mode == ucontrol->value.integer.value[0])
 510                 return 0;
 511         /* Do not allow changes while stream is running*/
 512         if (codec->active)
 513                 return -EPERM;
 514
 515         if (ucontrol->value.integer.value[0] < 0 ||
 516             ucontrol->value.integer.value[0] >= DAC33_FIFO_LAST_MODE)
 517                 ret = -EINVAL;
 518         else
 519                 dac33->fifo_mode = ucontrol->value.integer.value[0];
 520
 521         return ret;
 522 }
 523
 524 /* Codec operation modes */
 525 static const char *dac33_fifo_mode_texts[] = {
 526         "Bypass", "Mode 1", "Mode 7"
 527 };
 528
 529 static const struct soc_enum dac33_fifo_mode_enum =
 530         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(dac33_fifo_mode_texts),
 531                             dac33_fifo_mode_texts);
 532
 533 /* L/R Line Output Gain */
 534 static const char *lr_lineout_gain_texts[] = {
 535         "Line -12dB DAC 0dB", "Line -6dB DAC 6dB",
 536         "Line 0dB DAC 12dB", "Line 6dB DAC 18dB",
 537 };
 538
 539 static const struct soc_enum l_lineout_gain_enum =
 540         SOC_ENUM_SINGLE(DAC33_LDAC_PWR_CTRL, 0,
 541                         ARRAY_SIZE(lr_lineout_gain_texts),
 542                         lr_lineout_gain_texts);
 543
 544 static const struct soc_enum r_lineout_gain_enum =
 545         SOC_ENUM_SINGLE(DAC33_RDAC_PWR_CTRL, 0,
 546                         ARRAY_SIZE(lr_lineout_gain_texts),
 547                         lr_lineout_gain_texts);
 548
 549 /*
 550  * DACL/R digital volume control:
 551  * from 0 dB to -63.5 in 0.5 dB steps
 552  * Need to be inverted later on:
 553  * 0x00 == 0 dB
 554  * 0x7f == -63.5 dB
 555  */
 556 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
 557
 558 static const struct snd_kcontrol_new dac33_snd_controls[] = {
 559         SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
 560                 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
 561                 0, 0x7f, 1, dac_digivol_tlv),
 562         SOC_DOUBLE_R("DAC Digital Playback Switch",
 563                  DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
 564         SOC_DOUBLE_R("Line to Line Out Volume",
 565                  DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
 566         SOC_ENUM("Left Line Output Gain", l_lineout_gain_enum),
 567         SOC_ENUM("Right Line Output Gain", r_lineout_gain_enum),
 568 };
 569
 570 static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
 571         SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
 572                  dac33_get_fifo_mode, dac33_set_fifo_mode),
 573 };
 574
 575 static const struct snd_kcontrol_new dac33_fifo_snd_controls[] = {
 576         SOC_SINGLE_EXT("nSample", 0, 0, 5900, 0,
 577                 dac33_get_nsample, dac33_set_nsample),
 578         SOC_SINGLE_EXT("UTHR", 0, 0, MODE7_UTHR, 0,
 579                  dac33_get_uthr, dac33_set_uthr),
 580 };
 581
 582 /* Analog bypass */
 583 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
 584         SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
 585
 586 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
 587         SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
 588
 589 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
 590         SND_SOC_DAPM_OUTPUT("LEFT_LO"),
 591         SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
 592
 593         SND_SOC_DAPM_INPUT("LINEL"),
 594         SND_SOC_DAPM_INPUT("LINER"),
 595
 596         SND_SOC_DAPM_DAC("DACL", "Left Playback", DAC33_LDAC_PWR_CTRL, 2, 0),
 597         SND_SOC_DAPM_DAC("DACR", "Right Playback", DAC33_RDAC_PWR_CTRL, 2, 0),
 598
 599         /* Analog bypass */
 600         SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
 601                                 &dac33_dapm_abypassl_control),
 602         SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
 603                                 &dac33_dapm_abypassr_control),
 604
 605         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amp Power",
 606                          DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
 607         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amp Power",
 608                          DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
 609
 610         SND_SOC_DAPM_PRE("Prepare Playback", playback_event),
 611 };
 612
 613 static const struct snd_soc_dapm_route audio_map[] = {
 614         /* Analog bypass */
 615         {"Analog Left Bypass", "Switch", "LINEL"},
 616         {"Analog Right Bypass", "Switch", "LINER"},
 617
 618         {"Output Left Amp Power", NULL, "DACL"},
 619         {"Output Right Amp Power", NULL, "DACR"},
 620
 621         {"Output Left Amp Power", NULL, "Analog Left Bypass"},
 622         {"Output Right Amp Power", NULL, "Analog Right Bypass"},
 623
 624         /* output */
 625         {"LEFT_LO", NULL, "Output Left Amp Power"},
 626         {"RIGHT_LO", NULL, "Output Right Amp Power"},
 627 };
 628
 629 static int dac33_add_widgets(struct snd_soc_codec *codec)
 630 {
 631         snd_soc_dapm_new_controls(codec, dac33_dapm_widgets,
 632                                   ARRAY_SIZE(dac33_dapm_widgets));
 633
 634         /* set up audio path interconnects */
 635         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 636
 637         return 0;
 638 }
 639
 640 static int dac33_set_bias_level(struct snd_soc_codec *codec,
 641                                 enum snd_soc_bias_level level)
 642 {
 643         int ret;
 644
 645         switch (level) {
 646         case SND_SOC_BIAS_ON:
 647                 dac33_soft_power(codec, 1);
 648                 break;
 649         case SND_SOC_BIAS_PREPARE:
 650                 break;
 651         case SND_SOC_BIAS_STANDBY:
 652                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 653                         /* Coming from OFF, switch on the codec */
 654                         ret = dac33_hard_power(codec, 1);
 655                         if (ret != 0)
 656                                 return ret;
 657
 658                         dac33_init_chip(codec);
 659                 }
 660                 break;
 661         case SND_SOC_BIAS_OFF:
 662                 /* Do not power off, when the codec is already off */
 663                 if (codec->bias_level == SND_SOC_BIAS_OFF)
 664                         return 0;
 665                 ret = dac33_hard_power(codec, 0);
 666                 if (ret != 0)
 667                         return ret;
 668                 break;
 669         }
 670         codec->bias_level = level;
 671
 672         return 0;
 673 }
 674
 675 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
 676 {
 677         struct snd_soc_codec *codec = dac33->codec;
 678         unsigned int delay;
 679
 680         switch (dac33->fifo_mode) {
 681         case DAC33_FIFO_MODE1:
 682                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
 683                         DAC33_THRREG(dac33->nsample));
 684
 685                 /* Take the timestamps */
 686                 spin_lock_irq(&dac33->lock);
 687                 dac33->t_stamp2 = ktime_to_us(ktime_get());
 688                 dac33->t_stamp1 = dac33->t_stamp2;
 689                 spin_unlock_irq(&dac33->lock);
 690
 691                 dac33_write16(codec, DAC33_PREFILL_MSB,
 692                                 DAC33_THRREG(dac33->alarm_threshold));
 693                 /* Enable Alarm Threshold IRQ with a delay */
 694                 delay = SAMPLES_TO_US(dac33->burst_rate,
 695                                      dac33->alarm_threshold) + 1000;
 696                 usleep_range(delay, delay + 500);
 697                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
 698                 break;
 699         case DAC33_FIFO_MODE7:
 700                 /* Take the timestamp */
 701                 spin_lock_irq(&dac33->lock);
 702                 dac33->t_stamp1 = ktime_to_us(ktime_get());
 703                 /* Move back the timestamp with drain time */
 704                 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
 705                 spin_unlock_irq(&dac33->lock);
 706
 707                 dac33_write16(codec, DAC33_PREFILL_MSB,
 708                                 DAC33_THRREG(MODE7_LTHR));
 709
 710                 /* Enable Upper Threshold IRQ */
 711                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
 712                 break;
 713         default:
 714                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
 715                                                         dac33->fifo_mode);
 716                 break;
 717         }
 718 }
 719
 720 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
 721 {
 722         struct snd_soc_codec *codec = dac33->codec;
 723
 724         switch (dac33->fifo_mode) {
 725         case DAC33_FIFO_MODE1:
 726                 /* Take the timestamp */
 727                 spin_lock_irq(&dac33->lock);
 728                 dac33->t_stamp2 = ktime_to_us(ktime_get());
 729                 spin_unlock_irq(&dac33->lock);
 730
 731                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
 732                                 DAC33_THRREG(dac33->nsample));
 733                 break;
 734         case DAC33_FIFO_MODE7:
 735                 /* At the moment we are not using interrupts in mode7 */
 736                 break;
 737         default:
 738                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
 739                                                         dac33->fifo_mode);
 740                 break;
 741         }
 742 }
 743
 744 static void dac33_work(struct work_struct *work)
 745 {
 746         struct snd_soc_codec *codec;
 747         struct tlv320dac33_priv *dac33;
 748         u8 reg;
 749
 750         dac33 = container_of(work, struct tlv320dac33_priv, work);
 751         codec = dac33->codec;
 752
 753         mutex_lock(&dac33->mutex);
 754         switch (dac33->state) {
 755         case DAC33_PREFILL:
 756                 dac33->state = DAC33_PLAYBACK;
 757                 dac33_prefill_handler(dac33);
 758                 break;
 759         case DAC33_PLAYBACK:
 760                 dac33_playback_handler(dac33);
 761                 break;
 762         case DAC33_IDLE:
 763                 break;
 764         case DAC33_FLUSH:
 765                 dac33->state = DAC33_IDLE;
 766                 /* Mask all interrupts from dac33 */
 767                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
 768
 769                 /* flush fifo */
 770                 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
 771                 reg |= DAC33_FIFOFLUSH;
 772                 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
 773                 break;
 774         }
 775         mutex_unlock(&dac33->mutex);
 776 }
 777
 778 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
 779 {
 780         struct snd_soc_codec *codec = dev;
 781         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 782
 783         spin_lock(&dac33->lock);
 784         dac33->t_stamp1 = ktime_to_us(ktime_get());
 785         spin_unlock(&dac33->lock);
 786
 787         /* Do not schedule the workqueue in Mode7 */
 788         if (dac33->fifo_mode != DAC33_FIFO_MODE7)
 789                 queue_work(dac33->dac33_wq, &dac33->work);
 790
 791         return IRQ_HANDLED;
 792 }
 793
 794 static void dac33_oscwait(struct snd_soc_codec *codec)
 795 {
 796         int timeout = 60;
 797         u8 reg;
 798
 799         do {
 800                 usleep_range(1000, 2000);
 801                 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
 802         } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
 803         if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
 804                 dev_err(codec->dev,
 805                         "internal oscillator calibration failed\n");
 806 }
 807
 808 static int dac33_startup(struct snd_pcm_substream *substream,
 809                            struct snd_soc_dai *dai)
 810 {
 811         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 812         struct snd_soc_codec *codec = rtd->codec;
 813         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 814
 815         /* Stream started, save the substream pointer */
 816         dac33->substream = substream;
 817
 818         return 0;
 819 }
 820
 821 static void dac33_shutdown(struct snd_pcm_substream *substream,
 822                              struct snd_soc_dai *dai)
 823 {
 824         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 825         struct snd_soc_codec *codec = rtd->codec;
 826         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 827
 828         dac33->substream = NULL;
 829
 830         /* Reset the nSample restrictions */
 831         dac33->nsample_min = 0;
 832         dac33->nsample_max = NSAMPLE_MAX;
 833 }
 834
 835 static int dac33_hw_params(struct snd_pcm_substream *substream,
 836                            struct snd_pcm_hw_params *params,
 837                            struct snd_soc_dai *dai)
 838 {
 839         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 840         struct snd_soc_codec *codec = rtd->codec;
 841
 842         /* Check parameters for validity */
 843         switch (params_rate(params)) {
 844         case 44100:
 845         case 48000:
 846                 break;
 847         default:
 848                 dev_err(codec->dev, "unsupported rate %d\n",
 849                         params_rate(params));
 850                 return -EINVAL;
 851         }
 852
 853         switch (params_format(params)) {
 854         case SNDRV_PCM_FORMAT_S16_LE:
 855                 break;
 856         default:
 857                 dev_err(codec->dev, "unsupported format %d\n",
 858                         params_format(params));
 859                 return -EINVAL;
 860         }
 861
 862         return 0;
 863 }
 864
 865 #define CALC_OSCSET(rate, refclk) ( \
 866         ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
 867 #define CALC_RATIOSET(rate, refclk) ( \
 868         ((((refclk  * 100000) / rate) * 16384) + 50000) / 100000)
 869
 870 /*
 871  * tlv320dac33 is strict on the sequence of the register writes, if the register
 872  * writes happens in different order, than dac33 might end up in unknown state.
 873  * Use the known, working sequence of register writes to initialize the dac33.
 874  */
 875 static int dac33_prepare_chip(struct snd_pcm_substream *substream)
 876 {
 877         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 878         struct snd_soc_codec *codec = rtd->codec;
 879         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 880         unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
 881         u8 aictrl_a, aictrl_b, fifoctrl_a;
 882
 883         switch (substream->runtime->rate) {
 884         case 44100:
 885         case 48000:
 886                 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
 887                 ratioset = CALC_RATIOSET(substream->runtime->rate,
 888                                          dac33->refclk);
 889                 break;
 890         default:
 891                 dev_err(codec->dev, "unsupported rate %d\n",
 892                         substream->runtime->rate);
 893                 return -EINVAL;
 894         }
 895
 896
 897         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
 898         aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
 899         /* Read FIFO control A, and clear FIFO flush bit */
 900         fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
 901         fifoctrl_a &= ~DAC33_FIFOFLUSH;
 902
 903         fifoctrl_a &= ~DAC33_WIDTH;
 904         switch (substream->runtime->format) {
 905         case SNDRV_PCM_FORMAT_S16_LE:
 906                 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
 907                 fifoctrl_a |= DAC33_WIDTH;
 908                 break;
 909         default:
 910                 dev_err(codec->dev, "unsupported format %d\n",
 911                         substream->runtime->format);
 912                 return -EINVAL;
 913         }
 914
 915         mutex_lock(&dac33->mutex);
 916
 917         if (!dac33->chip_power) {
 918                 /*
 919                  * Chip is not powered yet.
 920                  * Do the init in the dac33_set_bias_level later.
 921                  */
 922                 mutex_unlock(&dac33->mutex);
 923                 return 0;
 924         }
 925
 926         dac33_soft_power(codec, 0);
 927         dac33_soft_power(codec, 1);
 928
 929         reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
 930         dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
 931
 932         /* Write registers 0x08 and 0x09 (MSB, LSB) */
 933         dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
 934
 935         /* calib time: 128 is a nice number ;) */
 936         dac33_write(codec, DAC33_CALIB_TIME, 128);
 937
 938         /* adjustment treshold & step */
 939         dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
 940                                                  DAC33_ADJSTEP(1));
 941
 942         /* div=4 / gain=1 / div */
 943         dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
 944
 945         pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
 946         pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
 947         dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
 948
 949         dac33_oscwait(codec);
 950
 951         if (dac33->fifo_mode) {
 952                 /* Generic for all FIFO modes */
 953                 /* 50-51 : ASRC Control registers */
 954                 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
 955                 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
 956
 957                 /* Write registers 0x34 and 0x35 (MSB, LSB) */
 958                 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
 959
 960                 /* Set interrupts to high active */
 961                 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
 962         } else {
 963                 /* FIFO bypass mode */
 964                 /* 50-51 : ASRC Control registers */
 965                 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
 966                 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
 967         }
 968
 969         /* Interrupt behaviour configuration */
 970         switch (dac33->fifo_mode) {
 971         case DAC33_FIFO_MODE1:
 972                 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
 973                             DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
 974                 break;
 975         case DAC33_FIFO_MODE7:
 976                 dac33_write(codec, DAC33_FIFO_IRQ_MODE_A,
 977                         DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
 978                 break;
 979         default:
 980                 /* in FIFO bypass mode, the interrupts are not used */
 981                 break;
 982         }
 983
 984         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
 985
 986         switch (dac33->fifo_mode) {
 987         case DAC33_FIFO_MODE1:
 988                 /*
 989                  * For mode1:
 990                  * Disable the FIFO bypass (Enable the use of FIFO)
 991                  * Select nSample mode
 992                  * BCLK is only running when data is needed by DAC33
 993                  */
 994                 fifoctrl_a &= ~DAC33_FBYPAS;
 995                 fifoctrl_a &= ~DAC33_FAUTO;
 996                 if (dac33->keep_bclk)
 997                         aictrl_b |= DAC33_BCLKON;
 998                 else
 999                         aictrl_b &= ~DAC33_BCLKON;
1000                 break;
1001         case DAC33_FIFO_MODE7:
1002                 /*
1003                  * For mode1:
1004                  * Disable the FIFO bypass (Enable the use of FIFO)
1005                  * Select Threshold mode
1006                  * BCLK is only running when data is needed by DAC33
1007                  */
1008                 fifoctrl_a &= ~DAC33_FBYPAS;
1009                 fifoctrl_a |= DAC33_FAUTO;
1010                 if (dac33->keep_bclk)
1011                         aictrl_b |= DAC33_BCLKON;
1012                 else
1013                         aictrl_b &= ~DAC33_BCLKON;
1014                 break;
1015         default:
1016                 /*
1017                  * For FIFO bypass mode:
1018                  * Enable the FIFO bypass (Disable the FIFO use)
1019                  * Set the BCLK as continous
1020                  */
1021                 fifoctrl_a |= DAC33_FBYPAS;
1022                 aictrl_b |= DAC33_BCLKON;
1023                 break;
1024         }
1025
1026         dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
1027         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1028         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1029
1030         /*
1031          * BCLK divide ratio
1032          * 0: 1.5
1033          * 1: 1
1034          * 2: 2
1035          * ...
1036          * 254: 254
1037          * 255: 255
1038          */
1039         if (dac33->fifo_mode)
1040                 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
1041                                                         dac33->burst_bclkdiv);
1042         else
1043                 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
1044
1045         switch (dac33->fifo_mode) {
1046         case DAC33_FIFO_MODE1:
1047                 dac33_write16(codec, DAC33_ATHR_MSB,
1048                               DAC33_THRREG(dac33->alarm_threshold));
1049                 break;
1050         case DAC33_FIFO_MODE7:
1051                 /*
1052                  * Configure the threshold levels, and leave 10 sample space
1053                  * at the bottom, and also at the top of the FIFO
1054                  */
1055                 dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1056                 dac33_write16(codec, DAC33_LTHR_MSB, DAC33_THRREG(MODE7_LTHR));
1057                 break;
1058         default:
1059                 break;
1060         }
1061
1062         mutex_unlock(&dac33->mutex);
1063
1064         return 0;
1065 }
1066
1067 static void dac33_calculate_times(struct snd_pcm_substream *substream)
1068 {
1069         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1070         struct snd_soc_codec *codec = rtd->codec;
1071         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1072         unsigned int period_size = substream->runtime->period_size;
1073         unsigned int rate = substream->runtime->rate;
1074         unsigned int nsample_limit;
1075
1076         /* In bypass mode we don't need to calculate */
1077         if (!dac33->fifo_mode)
1078                 return;
1079
1080         switch (dac33->fifo_mode) {
1081         case DAC33_FIFO_MODE1:
1082                 /* Number of samples under i2c latency */
1083                 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1084                                                 dac33->mode1_latency);
1085                 if (dac33->auto_fifo_config) {
1086                         if (period_size <= dac33->alarm_threshold)
1087                                 /*
1088                                  * Configure nSamaple to number of periods,
1089                                  * which covers the latency requironment.
1090                                  */
1091                                 dac33->nsample = period_size *
1092                                        ((dac33->alarm_threshold / period_size) +
1093                                        (dac33->alarm_threshold % period_size ?
1094                                        1 : 0));
1095                         else
1096                                 dac33->nsample = period_size;
1097                 } else {
1098                         /* nSample time shall not be shorter than i2c latency */
1099                         dac33->nsample_min = dac33->alarm_threshold;
1100                         /*
1101                          * nSample should not be bigger than alsa buffer minus
1102                          * size of one period to avoid overruns
1103                          */
1104                         dac33->nsample_max = substream->runtime->buffer_size -
1105                                                 period_size;
1106                         nsample_limit = DAC33_BUFFER_SIZE_SAMPLES -
1107                                         dac33->alarm_threshold;
1108                         if (dac33->nsample_max > nsample_limit)
1109                                 dac33->nsample_max = nsample_limit;
1110
1111                         /* Correct the nSample if it is outside of the ranges */
1112                         if (dac33->nsample < dac33->nsample_min)
1113                                 dac33->nsample = dac33->nsample_min;
1114                         if (dac33->nsample > dac33->nsample_max)
1115                                 dac33->nsample = dac33->nsample_max;
1116                 }
1117
1118                 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
1119                                                       dac33->nsample);
1120                 dac33->t_stamp1 = 0;
1121                 dac33->t_stamp2 = 0;
1122                 break;
1123         case DAC33_FIFO_MODE7:
1124                 if (dac33->auto_fifo_config) {
1125                         dac33->uthr = UTHR_FROM_PERIOD_SIZE(
1126                                         period_size,
1127                                         rate,
1128                                         dac33->burst_rate) + 9;
1129                         if (dac33->uthr > MODE7_UTHR)
1130                                 dac33->uthr = MODE7_UTHR;
1131                         if (dac33->uthr < (MODE7_LTHR + 10))
1132                                 dac33->uthr = (MODE7_LTHR + 10);
1133                 }
1134                 dac33->mode7_us_to_lthr =
1135                                 SAMPLES_TO_US(substream->runtime->rate,
1136                                         dac33->uthr - MODE7_LTHR + 1);
1137                 dac33->t_stamp1 = 0;
1138                 break;
1139         default:
1140                 break;
1141         }
1142
1143 }
1144
1145 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1146                              struct snd_soc_dai *dai)
1147 {
1148         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1149         struct snd_soc_codec *codec = rtd->codec;
1150         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1151         int ret = 0;
1152
1153         switch (cmd) {
1154         case SNDRV_PCM_TRIGGER_START:
1155         case SNDRV_PCM_TRIGGER_RESUME:
1156         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1157                 if (dac33->fifo_mode) {
1158                         dac33->state = DAC33_PREFILL;
1159                         queue_work(dac33->dac33_wq, &dac33->work);
1160                 }
1161                 break;
1162         case SNDRV_PCM_TRIGGER_STOP:
1163         case SNDRV_PCM_TRIGGER_SUSPEND:
1164         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1165                 if (dac33->fifo_mode) {
1166                         dac33->state = DAC33_FLUSH;
1167                         queue_work(dac33->dac33_wq, &dac33->work);
1168                 }
1169                 break;
1170         default:
1171                 ret = -EINVAL;
1172         }
1173
1174         return ret;
1175 }
1176
1177 static snd_pcm_sframes_t dac33_dai_delay(
1178                         struct snd_pcm_substream *substream,
1179                         struct snd_soc_dai *dai)
1180 {
1181         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1182         struct snd_soc_codec *codec = rtd->codec;
1183         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1184         unsigned long long t0, t1, t_now;
1185         unsigned int time_delta, uthr;
1186         int samples_out, samples_in, samples;
1187         snd_pcm_sframes_t delay = 0;
1188
1189         switch (dac33->fifo_mode) {
1190         case DAC33_FIFO_BYPASS:
1191                 break;
1192         case DAC33_FIFO_MODE1:
1193                 spin_lock(&dac33->lock);
1194                 t0 = dac33->t_stamp1;
1195                 t1 = dac33->t_stamp2;
1196                 spin_unlock(&dac33->lock);
1197                 t_now = ktime_to_us(ktime_get());
1198
1199                 /* We have not started to fill the FIFO yet, delay is 0 */
1200                 if (!t1)
1201                         goto out;
1202
1203                 if (t0 > t1) {
1204                         /*
1205                          * Phase 1:
1206                          * After Alarm threshold, and before nSample write
1207                          */
1208                         time_delta = t_now - t0;
1209                         samples_out = time_delta ? US_TO_SAMPLES(
1210                                                 substream->runtime->rate,
1211                                                 time_delta) : 0;
1212
1213                         if (likely(dac33->alarm_threshold > samples_out))
1214                                 delay = dac33->alarm_threshold - samples_out;
1215                         else
1216                                 delay = 0;
1217                 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1218                         /*
1219                          * Phase 2:
1220                          * After nSample write (during burst operation)
1221                          */
1222                         time_delta = t_now - t0;
1223                         samples_out = time_delta ? US_TO_SAMPLES(
1224                                                 substream->runtime->rate,
1225                                                 time_delta) : 0;
1226
1227                         time_delta = t_now - t1;
1228                         samples_in = time_delta ? US_TO_SAMPLES(
1229                                                 dac33->burst_rate,
1230                                                 time_delta) : 0;
1231
1232                         samples = dac33->alarm_threshold;
1233                         samples += (samples_in - samples_out);
1234
1235                         if (likely(samples > 0))
1236                                 delay = samples;
1237                         else
1238                                 delay = 0;
1239                 } else {
1240                         /*
1241                          * Phase 3:
1242                          * After burst operation, before next alarm threshold
1243                          */
1244                         time_delta = t_now - t0;
1245                         samples_out = time_delta ? US_TO_SAMPLES(
1246                                                 substream->runtime->rate,
1247                                                 time_delta) : 0;
1248
1249                         samples_in = dac33->nsample;
1250                         samples = dac33->alarm_threshold;
1251                         samples += (samples_in - samples_out);
1252
1253                         if (likely(samples > 0))
1254                                 delay = samples > DAC33_BUFFER_SIZE_SAMPLES ?
1255                                         DAC33_BUFFER_SIZE_SAMPLES : samples;
1256                         else
1257                                 delay = 0;
1258                 }
1259                 break;
1260         case DAC33_FIFO_MODE7:
1261                 spin_lock(&dac33->lock);
1262                 t0 = dac33->t_stamp1;
1263                 uthr = dac33->uthr;
1264                 spin_unlock(&dac33->lock);
1265                 t_now = ktime_to_us(ktime_get());
1266
1267                 /* We have not started to fill the FIFO yet, delay is 0 */
1268                 if (!t0)
1269                         goto out;
1270
1271                 if (t_now <= t0) {
1272                         /*
1273                          * Either the timestamps are messed or equal. Report
1274                          * maximum delay
1275                          */
1276                         delay = uthr;
1277                         goto out;
1278                 }
1279
1280                 time_delta = t_now - t0;
1281                 if (time_delta <= dac33->mode7_us_to_lthr) {
1282                         /*
1283                         * Phase 1:
1284                         * After burst (draining phase)
1285                         */
1286                         samples_out = US_TO_SAMPLES(
1287                                         substream->runtime->rate,
1288                                         time_delta);
1289
1290                         if (likely(uthr > samples_out))
1291                                 delay = uthr - samples_out;
1292                         else
1293                                 delay = 0;
1294                 } else {
1295                         /*
1296                         * Phase 2:
1297                         * During burst operation
1298                         */
1299                         time_delta = time_delta - dac33->mode7_us_to_lthr;
1300
1301                         samples_out = US_TO_SAMPLES(
1302                                         substream->runtime->rate,
1303                                         time_delta);
1304                         samples_in = US_TO_SAMPLES(
1305                                         dac33->burst_rate,
1306                                         time_delta);
1307                         delay = MODE7_LTHR + samples_in - samples_out;
1308
1309                         if (unlikely(delay > uthr))
1310                                 delay = uthr;
1311                 }
1312                 break;
1313         default:
1314                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
1315                                                         dac33->fifo_mode);
1316                 break;
1317         }
1318 out:
1319         return delay;
1320 }
1321
1322 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1323                 int clk_id, unsigned int freq, int dir)
1324 {
1325         struct snd_soc_codec *codec = codec_dai->codec;
1326         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1327         u8 ioc_reg, asrcb_reg;
1328
1329         ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
1330         asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
1331         switch (clk_id) {
1332         case TLV320DAC33_MCLK:
1333                 ioc_reg |= DAC33_REFSEL;
1334                 asrcb_reg |= DAC33_SRCREFSEL;
1335                 break;
1336         case TLV320DAC33_SLEEPCLK:
1337                 ioc_reg &= ~DAC33_REFSEL;
1338                 asrcb_reg &= ~DAC33_SRCREFSEL;
1339                 break;
1340         default:
1341                 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
1342                 break;
1343         }
1344         dac33->refclk = freq;
1345
1346         dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
1347         dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
1348
1349         return 0;
1350 }
1351
1352 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1353                              unsigned int fmt)
1354 {
1355         struct snd_soc_codec *codec = codec_dai->codec;
1356         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1357         u8 aictrl_a, aictrl_b;
1358
1359         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1360         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1361         /* set master/slave audio interface */
1362         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1363         case SND_SOC_DAIFMT_CBM_CFM:
1364                 /* Codec Master */
1365                 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1366                 break;
1367         case SND_SOC_DAIFMT_CBS_CFS:
1368                 /* Codec Slave */
1369                 if (dac33->fifo_mode) {
1370                         dev_err(codec->dev, "FIFO mode requires master mode\n");
1371                         return -EINVAL;
1372                 } else
1373                         aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1374                 break;
1375         default:
1376                 return -EINVAL;
1377         }
1378
1379         aictrl_a &= ~DAC33_AFMT_MASK;
1380         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1381         case SND_SOC_DAIFMT_I2S:
1382                 aictrl_a |= DAC33_AFMT_I2S;
1383                 break;
1384         case SND_SOC_DAIFMT_DSP_A:
1385                 aictrl_a |= DAC33_AFMT_DSP;
1386                 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1387                 aictrl_b |= DAC33_DATA_DELAY(0);
1388                 break;
1389         case SND_SOC_DAIFMT_RIGHT_J:
1390                 aictrl_a |= DAC33_AFMT_RIGHT_J;
1391                 break;
1392         case SND_SOC_DAIFMT_LEFT_J:
1393                 aictrl_a |= DAC33_AFMT_LEFT_J;
1394                 break;
1395         default:
1396                 dev_err(codec->dev, "Unsupported format (%u)\n",
1397                         fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1398                 return -EINVAL;
1399         }
1400
1401         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1402         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1403
1404         return 0;
1405 }
1406
1407 static int dac33_soc_probe(struct snd_soc_codec *codec)
1408 {
1409         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1410         int ret = 0;
1411
1412         codec->control_data = dac33->control_data;
1413         codec->hw_write = (hw_write_t) i2c_master_send;
1414         codec->idle_bias_off = 1;
1415         dac33->codec = codec;
1416
1417         /* Read the tlv320dac33 ID registers */
1418         ret = dac33_hard_power(codec, 1);
1419         if (ret != 0) {
1420                 dev_err(codec->dev, "Failed to power up codec: %d\n", ret);
1421                 goto err_power;
1422         }
1423         ret = dac33_read_id(codec);
1424         dac33_hard_power(codec, 0);
1425
1426         if (ret < 0) {
1427                 dev_err(codec->dev, "Failed to read chip ID: %d\n", ret);
1428                 ret = -ENODEV;
1429                 goto err_power;
1430         }
1431
1432         /* Check if the IRQ number is valid and request it */
1433         if (dac33->irq >= 0) {
1434                 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1435                                   IRQF_TRIGGER_RISING | IRQF_DISABLED,
1436                                   codec->name, codec);
1437                 if (ret < 0) {
1438                         dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1439                                                 dac33->irq, ret);
1440                         dac33->irq = -1;
1441                 }
1442                 if (dac33->irq != -1) {
1443                         /* Setup work queue */
1444                         dac33->dac33_wq =
1445                                 create_singlethread_workqueue("tlv320dac33");
1446                         if (dac33->dac33_wq == NULL) {
1447                                 free_irq(dac33->irq, codec);
1448                                 return -ENOMEM;
1449                         }
1450
1451                         INIT_WORK(&dac33->work, dac33_work);
1452                 }
1453         }
1454
1455         snd_soc_add_controls(codec, dac33_snd_controls,
1456                              ARRAY_SIZE(dac33_snd_controls));
1457         /* Only add the FIFO controls, if we have valid IRQ number */
1458         if (dac33->irq >= 0) {
1459                 snd_soc_add_controls(codec, dac33_mode_snd_controls,
1460                                      ARRAY_SIZE(dac33_mode_snd_controls));
1461                 /* FIFO usage controls only, if autoio config is not selected */
1462                 if (!dac33->auto_fifo_config)
1463                         snd_soc_add_controls(codec, dac33_fifo_snd_controls,
1464                                         ARRAY_SIZE(dac33_fifo_snd_controls));
1465         }
1466         dac33_add_widgets(codec);
1467
1468 err_power:
1469         return ret;
1470 }
1471
1472 static int dac33_soc_remove(struct snd_soc_codec *codec)
1473 {
1474         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1475
1476         dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1477
1478         if (dac33->irq >= 0) {
1479                 free_irq(dac33->irq, dac33->codec);
1480                 destroy_workqueue(dac33->dac33_wq);
1481         }
1482         return 0;
1483 }
1484
1485 static int dac33_soc_suspend(struct snd_soc_codec *codec, pm_message_t state)
1486 {
1487         dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1488
1489         return 0;
1490 }
1491
1492 static int dac33_soc_resume(struct snd_soc_codec *codec)
1493 {
1494         dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1495
1496         return 0;
1497 }
1498
1499 static struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = {
1500         .read = dac33_read_reg_cache,
1501         .write = dac33_write_locked,
1502         .set_bias_level = dac33_set_bias_level,
1503         .reg_cache_size = ARRAY_SIZE(dac33_reg),
1504         .reg_word_size = sizeof(u8),
1505         .reg_cache_default = dac33_reg,
1506         .probe = dac33_soc_probe,
1507         .remove = dac33_soc_remove,
1508         .suspend = dac33_soc_suspend,
1509         .resume = dac33_soc_resume,
1510 };
1511
1512 #define DAC33_RATES     (SNDRV_PCM_RATE_44100 | \
1513                          SNDRV_PCM_RATE_48000)
1514 #define DAC33_FORMATS   SNDRV_PCM_FMTBIT_S16_LE
1515
1516 static struct snd_soc_dai_ops dac33_dai_ops = {
1517         .startup        = dac33_startup,
1518         .shutdown       = dac33_shutdown,
1519         .hw_params      = dac33_hw_params,
1520         .trigger        = dac33_pcm_trigger,
1521         .delay          = dac33_dai_delay,
1522         .set_sysclk     = dac33_set_dai_sysclk,
1523         .set_fmt        = dac33_set_dai_fmt,
1524 };
1525
1526 static struct snd_soc_dai_driver dac33_dai = {
1527         .name = "tlv320dac33-hifi",
1528         .playback = {
1529                 .stream_name = "Playback",
1530                 .channels_min = 2,
1531                 .channels_max = 2,
1532                 .rates = DAC33_RATES,
1533                 .formats = DAC33_FORMATS,},
1534         .ops = &dac33_dai_ops,
1535 };
1536
1537 static int __devinit dac33_i2c_probe(struct i2c_client *client,
1538                                      const struct i2c_device_id *id)
1539 {
1540         struct tlv320dac33_platform_data *pdata;
1541         struct tlv320dac33_priv *dac33;
1542         int ret, i;
1543
1544         if (client->dev.platform_data == NULL) {
1545                 dev_err(&client->dev, "Platform data not set\n");
1546                 return -ENODEV;
1547         }
1548         pdata = client->dev.platform_data;
1549
1550         dac33 = kzalloc(sizeof(struct tlv320dac33_priv), GFP_KERNEL);
1551         if (dac33 == NULL)
1552                 return -ENOMEM;
1553
1554         dac33->control_data = client;
1555         mutex_init(&dac33->mutex);
1556         spin_lock_init(&dac33->lock);
1557
1558         i2c_set_clientdata(client, dac33);
1559
1560         dac33->power_gpio = pdata->power_gpio;
1561         dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1562         /* Pre calculate the burst rate */
1563         dac33->burst_rate = BURST_BASEFREQ_HZ / dac33->burst_bclkdiv / 32;
1564         dac33->keep_bclk = pdata->keep_bclk;
1565         dac33->auto_fifo_config = pdata->auto_fifo_config;
1566         dac33->mode1_latency = pdata->mode1_latency;
1567         if (!dac33->mode1_latency)
1568                 dac33->mode1_latency = 10000; /* 10ms */
1569         dac33->irq = client->irq;
1570         dac33->nsample = NSAMPLE_MAX;
1571         dac33->nsample_max = NSAMPLE_MAX;
1572         dac33->uthr = MODE7_UTHR;
1573         /* Disable FIFO use by default */
1574         dac33->fifo_mode = DAC33_FIFO_BYPASS;
1575
1576         /* Check if the reset GPIO number is valid and request it */
1577         if (dac33->power_gpio >= 0) {
1578                 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1579                 if (ret < 0) {
1580                         dev_err(&client->dev,
1581                                 "Failed to request reset GPIO (%d)\n",
1582                                 dac33->power_gpio);
1583                         goto err_gpio;
1584                 }
1585                 gpio_direction_output(dac33->power_gpio, 0);
1586         }
1587
1588         for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1589                 dac33->supplies[i].supply = dac33_supply_names[i];
1590
1591         ret = regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
1592                                  dac33->supplies);
1593
1594         if (ret != 0) {
1595                 dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
1596                 goto err_get;
1597         }
1598
1599         ret = snd_soc_register_codec(&client->dev,
1600                         &soc_codec_dev_tlv320dac33, &dac33_dai, 1);
1601         if (ret < 0)
1602                 goto err_register;
1603
1604         return ret;
1605 err_register:
1606         regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1607 err_get:
1608         if (dac33->power_gpio >= 0)
1609                 gpio_free(dac33->power_gpio);
1610 err_gpio:
1611         kfree(dac33);
1612         return ret;
1613 }
1614
1615 static int __devexit dac33_i2c_remove(struct i2c_client *client)
1616 {
1617         struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
1618
1619         if (unlikely(dac33->chip_power))
1620                 dac33_hard_power(dac33->codec, 0);
1621
1622         if (dac33->power_gpio >= 0)
1623                 gpio_free(dac33->power_gpio);
1624
1625         regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1626
1627         snd_soc_unregister_codec(&client->dev);
1628         kfree(dac33);
1629
1630         return 0;
1631 }
1632
1633 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1634         {
1635                 .name = "tlv320dac33",
1636                 .driver_data = 0,
1637         },
1638         { },
1639 };
1640
1641 static struct i2c_driver tlv320dac33_i2c_driver = {
1642         .driver = {
1643                 .name = "tlv320dac33-codec",
1644                 .owner = THIS_MODULE,
1645         },
1646         .probe          = dac33_i2c_probe,
1647         .remove         = __devexit_p(dac33_i2c_remove),
1648         .id_table       = tlv320dac33_i2c_id,
1649 };
1650
1651 static int __init dac33_module_init(void)
1652 {
1653         int r;
1654         r = i2c_add_driver(&tlv320dac33_i2c_driver);
1655         if (r < 0) {
1656                 printk(KERN_ERR "DAC33: driver registration failed\n");
1657                 return r;
1658         }
1659         return 0;
1660 }
1661 module_init(dac33_module_init);
1662
1663 static void __exit dac33_module_exit(void)
1664 {
1665         i2c_del_driver(&tlv320dac33_i2c_driver);
1666 }
1667 module_exit(dac33_module_exit);
1668
1669
1670 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1671 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
1672 MODULE_LICENSE("GPL");