sound/soc/codecs/tlv320dac33.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ALSA SoC Texas Instruments TLV320DAC33 codec driver
   4  *
   5  * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
   6  *
   7  * Copyright:   (C) 2009 Nokia Corporation
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/moduleparam.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/pm.h>
  15 #include <linux/i2c.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/gpio.h>
  18 #include <linux/regulator/consumer.h>
  19 #include <linux/slab.h>
  20 #include <sound/core.h>
  21 #include <sound/pcm.h>
  22 #include <sound/pcm_params.h>
  23 #include <sound/soc.h>
  24 #include <sound/initval.h>
  25 #include <sound/tlv.h>
  26
  27 #include <sound/tlv320dac33-plat.h>
  28 #include "tlv320dac33.h"
  29
  30 /*
  31  * The internal FIFO is 24576 bytes long
  32  * It can be configured to hold 16bit or 24bit samples
  33  * In 16bit configuration the FIFO can hold 6144 stereo samples
  34  * In 24bit configuration the FIFO can hold 4096 stereo samples
  35  */
  36 #define DAC33_FIFO_SIZE_16BIT   6144
  37 #define DAC33_FIFO_SIZE_24BIT   4096
  38 #define DAC33_MODE7_MARGIN      10      /* Safety margin for FIFO in Mode7 */
  39
  40 #define BURST_BASEFREQ_HZ       49152000
  41
  42 #define SAMPLES_TO_US(rate, samples) \
  43         (1000000000 / (((rate) * 1000) / (samples)))
  44
  45 #define US_TO_SAMPLES(rate, us) \
  46         ((rate) / (1000000 / ((us) < 1000000 ? (us) : 1000000)))
  47
  48 #define UTHR_FROM_PERIOD_SIZE(samples, playrate, burstrate) \
  49         (((samples)*5000) / (((burstrate)*5000) / ((burstrate) - (playrate))))
  50
  51 static void dac33_calculate_times(struct snd_pcm_substream *substream,
  52                                   struct snd_soc_component *component);
  53 static int dac33_prepare_chip(struct snd_pcm_substream *substream,
  54                               struct snd_soc_component *component);
  55
  56 enum dac33_state {
  57         DAC33_IDLE = 0,
  58         DAC33_PREFILL,
  59         DAC33_PLAYBACK,
  60         DAC33_FLUSH,
  61 };
  62
  63 enum dac33_fifo_modes {
  64         DAC33_FIFO_BYPASS = 0,
  65         DAC33_FIFO_MODE1,
  66         DAC33_FIFO_MODE7,
  67         DAC33_FIFO_LAST_MODE,
  68 };
  69
  70 #define DAC33_NUM_SUPPLIES 3
  71 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
  72         "AVDD",
  73         "DVDD",
  74         "IOVDD",
  75 };
  76
  77 struct tlv320dac33_priv {
  78         struct mutex mutex;
  79         struct work_struct work;
  80         struct snd_soc_component *component;
  81         struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
  82         struct snd_pcm_substream *substream;
  83         int power_gpio;
  84         int chip_power;
  85         int irq;
  86         unsigned int refclk;
  87
  88         unsigned int alarm_threshold;   /* set to be half of LATENCY_TIME_MS */
  89         enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
  90         unsigned int fifo_size;         /* Size of the FIFO in samples */
  91         unsigned int nsample;           /* burst read amount from host */
  92         int mode1_latency;              /* latency caused by the i2c writes in
  93                                          * us */
  94         u8 burst_bclkdiv;               /* BCLK divider value in burst mode */
  95         u8 *reg_cache;
  96         unsigned int burst_rate;        /* Interface speed in Burst modes */
  97
  98         int keep_bclk;                  /* Keep the BCLK continuously running
  99                                          * in FIFO modes */
 100         spinlock_t lock;
 101         unsigned long long t_stamp1;    /* Time stamp for FIFO modes to */
 102         unsigned long long t_stamp2;    /* calculate the FIFO caused delay */
 103
 104         unsigned int mode1_us_burst;    /* Time to burst read n number of
 105                                          * samples */
 106         unsigned int mode7_us_to_lthr;  /* Time to reach lthr from uthr */
 107
 108         unsigned int uthr;
 109
 110         enum dac33_state state;
 111         struct i2c_client *i2c;
 112 };
 113
 114 static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
 115 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
 116 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
 117 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
 118 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
 119 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
 120 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
 121 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
 122 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
 123 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
 124 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
 125 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
 126 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
 127 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
 128 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
 129 0x00, 0x00,             /* 0x38 - 0x39 */
 130 /* Registers 0x3a - 0x3f are reserved  */
 131             0x00, 0x00, /* 0x3a - 0x3b */
 132 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
 133
 134 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
 135 0x00, 0x80,             /* 0x44 - 0x45 */
 136 /* Registers 0x46 - 0x47 are reserved  */
 137             0x80, 0x80, /* 0x46 - 0x47 */
 138
 139 0x80, 0x00, 0x00,       /* 0x48 - 0x4a */
 140 /* Registers 0x4b - 0x7c are reserved  */
 141                   0x00, /* 0x4b        */
 142 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
 143 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
 144 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
 145 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
 146 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
 147 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
 148 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
 149 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
 150 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
 151 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
 152 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
 153 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
 154 0x00,                   /* 0x7c        */
 155
 156       0xda, 0x33, 0x03, /* 0x7d - 0x7f */
 157 };
 158
 159 /* Register read and write */
 160 static inline unsigned int dac33_read_reg_cache(struct snd_soc_component *component,
 161                                                 unsigned reg)
 162 {
 163         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 164         u8 *cache = dac33->reg_cache;
 165         if (reg >= DAC33_CACHEREGNUM)
 166                 return 0;
 167
 168         return cache[reg];
 169 }
 170
 171 static inline void dac33_write_reg_cache(struct snd_soc_component *component,
 172                                          u8 reg, u8 value)
 173 {
 174         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 175         u8 *cache = dac33->reg_cache;
 176         if (reg >= DAC33_CACHEREGNUM)
 177                 return;
 178
 179         cache[reg] = value;
 180 }
 181
 182 static int dac33_read(struct snd_soc_component *component, unsigned int reg,
 183                       u8 *value)
 184 {
 185         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 186         int val, ret = 0;
 187
 188         *value = reg & 0xff;
 189
 190         /* If powered off, return the cached value */
 191         if (dac33->chip_power) {
 192                 val = i2c_smbus_read_byte_data(dac33->i2c, value[0]);
 193                 if (val < 0) {
 194                         dev_err(component->dev, "Read failed (%d)\n", val);
 195                         value[0] = dac33_read_reg_cache(component, reg);
 196                         ret = val;
 197                 } else {
 198                         value[0] = val;
 199                         dac33_write_reg_cache(component, reg, val);
 200                 }
 201         } else {
 202                 value[0] = dac33_read_reg_cache(component, reg);
 203         }
 204
 205         return ret;
 206 }
 207
 208 static int dac33_write(struct snd_soc_component *component, unsigned int reg,
 209                        unsigned int value)
 210 {
 211         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 212         u8 data[2];
 213         int ret = 0;
 214
 215         /*
 216          * data is
 217          *   D15..D8 dac33 register offset
 218          *   D7...D0 register data
 219          */
 220         data[0] = reg & 0xff;
 221         data[1] = value & 0xff;
 222
 223         dac33_write_reg_cache(component, data[0], data[1]);
 224         if (dac33->chip_power) {
 225                 ret = i2c_master_send(dac33->i2c, data, 2);
 226                 if (ret != 2)
 227                         dev_err(component->dev, "Write failed (%d)\n", ret);
 228                 else
 229                         ret = 0;
 230         }
 231
 232         return ret;
 233 }
 234
 235 static int dac33_write_locked(struct snd_soc_component *component, unsigned int reg,
 236                               unsigned int value)
 237 {
 238         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 239         int ret;
 240
 241         mutex_lock(&dac33->mutex);
 242         ret = dac33_write(component, reg, value);
 243         mutex_unlock(&dac33->mutex);
 244
 245         return ret;
 246 }
 247
 248 #define DAC33_I2C_ADDR_AUTOINC  0x80
 249 static int dac33_write16(struct snd_soc_component *component, unsigned int reg,
 250                        unsigned int value)
 251 {
 252         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 253         u8 data[3];
 254         int ret = 0;
 255
 256         /*
 257          * data is
 258          *   D23..D16 dac33 register offset
 259          *   D15..D8  register data MSB
 260          *   D7...D0  register data LSB
 261          */
 262         data[0] = reg & 0xff;
 263         data[1] = (value >> 8) & 0xff;
 264         data[2] = value & 0xff;
 265
 266         dac33_write_reg_cache(component, data[0], data[1]);
 267         dac33_write_reg_cache(component, data[0] + 1, data[2]);
 268
 269         if (dac33->chip_power) {
 270                 /* We need to set autoincrement mode for 16 bit writes */
 271                 data[0] |= DAC33_I2C_ADDR_AUTOINC;
 272                 ret = i2c_master_send(dac33->i2c, data, 3);
 273                 if (ret != 3)
 274                         dev_err(component->dev, "Write failed (%d)\n", ret);
 275                 else
 276                         ret = 0;
 277         }
 278
 279         return ret;
 280 }
 281
 282 static void dac33_init_chip(struct snd_soc_component *component)
 283 {
 284         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 285
 286         if (unlikely(!dac33->chip_power))
 287                 return;
 288
 289         /* A : DAC sample rate Fsref/1.5 */
 290         dac33_write(component, DAC33_DAC_CTRL_A, DAC33_DACRATE(0));
 291         /* B : DAC src=normal, not muted */
 292         dac33_write(component, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
 293                                              DAC33_DACSRCL_LEFT);
 294         /* C : (defaults) */
 295         dac33_write(component, DAC33_DAC_CTRL_C, 0x00);
 296
 297         /* 73 : volume soft stepping control,
 298          clock source = internal osc (?) */
 299         dac33_write(component, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
 300
 301         /* Restore only selected registers (gains mostly) */
 302         dac33_write(component, DAC33_LDAC_DIG_VOL_CTRL,
 303                     dac33_read_reg_cache(component, DAC33_LDAC_DIG_VOL_CTRL));
 304         dac33_write(component, DAC33_RDAC_DIG_VOL_CTRL,
 305                     dac33_read_reg_cache(component, DAC33_RDAC_DIG_VOL_CTRL));
 306
 307         dac33_write(component, DAC33_LINEL_TO_LLO_VOL,
 308                     dac33_read_reg_cache(component, DAC33_LINEL_TO_LLO_VOL));
 309         dac33_write(component, DAC33_LINER_TO_RLO_VOL,
 310                     dac33_read_reg_cache(component, DAC33_LINER_TO_RLO_VOL));
 311
 312         dac33_write(component, DAC33_OUT_AMP_CTRL,
 313                     dac33_read_reg_cache(component, DAC33_OUT_AMP_CTRL));
 314
 315         dac33_write(component, DAC33_LDAC_PWR_CTRL,
 316                     dac33_read_reg_cache(component, DAC33_LDAC_PWR_CTRL));
 317         dac33_write(component, DAC33_RDAC_PWR_CTRL,
 318                     dac33_read_reg_cache(component, DAC33_RDAC_PWR_CTRL));
 319 }
 320
 321 static inline int dac33_read_id(struct snd_soc_component *component)
 322 {
 323         int i, ret = 0;
 324         u8 reg;
 325
 326         for (i = 0; i < 3; i++) {
 327                 ret = dac33_read(component, DAC33_DEVICE_ID_MSB + i, &reg);
 328                 if (ret < 0)
 329                         break;
 330         }
 331
 332         return ret;
 333 }
 334
 335 static inline void dac33_soft_power(struct snd_soc_component *component, int power)
 336 {
 337         u8 reg;
 338
 339         reg = dac33_read_reg_cache(component, DAC33_PWR_CTRL);
 340         if (power)
 341                 reg |= DAC33_PDNALLB;
 342         else
 343                 reg &= ~(DAC33_PDNALLB | DAC33_OSCPDNB |
 344                          DAC33_DACRPDNB | DAC33_DACLPDNB);
 345         dac33_write(component, DAC33_PWR_CTRL, reg);
 346 }
 347
 348 static inline void dac33_disable_digital(struct snd_soc_component *component)
 349 {
 350         u8 reg;
 351
 352         /* Stop the DAI clock */
 353         reg = dac33_read_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_B);
 354         reg &= ~DAC33_BCLKON;
 355         dac33_write(component, DAC33_SER_AUDIOIF_CTRL_B, reg);
 356
 357         /* Power down the Oscillator, and DACs */
 358         reg = dac33_read_reg_cache(component, DAC33_PWR_CTRL);
 359         reg &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB);
 360         dac33_write(component, DAC33_PWR_CTRL, reg);
 361 }
 362
 363 static int dac33_hard_power(struct snd_soc_component *component, int power)
 364 {
 365         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 366         int ret = 0;
 367
 368         mutex_lock(&dac33->mutex);
 369
 370         /* Safety check */
 371         if (unlikely(power == dac33->chip_power)) {
 372                 dev_dbg(component->dev, "Trying to set the same power state: %s\n",
 373                         power ? "ON" : "OFF");
 374                 goto exit;
 375         }
 376
 377         if (power) {
 378                 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
 379                                           dac33->supplies);
 380                 if (ret != 0) {
 381                         dev_err(component->dev,
 382                                 "Failed to enable supplies: %d\n", ret);
 383                         goto exit;
 384                 }
 385
 386                 if (dac33->power_gpio >= 0)
 387                         gpio_set_value(dac33->power_gpio, 1);
 388
 389                 dac33->chip_power = 1;
 390         } else {
 391                 dac33_soft_power(component, 0);
 392                 if (dac33->power_gpio >= 0)
 393                         gpio_set_value(dac33->power_gpio, 0);
 394
 395                 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
 396                                              dac33->supplies);
 397                 if (ret != 0) {
 398                         dev_err(component->dev,
 399                                 "Failed to disable supplies: %d\n", ret);
 400                         goto exit;
 401                 }
 402
 403                 dac33->chip_power = 0;
 404         }
 405
 406 exit:
 407         mutex_unlock(&dac33->mutex);
 408         return ret;
 409 }
 410
 411 static int dac33_playback_event(struct snd_soc_dapm_widget *w,
 412                 struct snd_kcontrol *kcontrol, int event)
 413 {
 414         struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
 415         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 416
 417         switch (event) {
 418         case SND_SOC_DAPM_PRE_PMU:
 419                 if (likely(dac33->substream)) {
 420                         dac33_calculate_times(dac33->substream, component);
 421                         dac33_prepare_chip(dac33->substream, component);
 422                 }
 423                 break;
 424         case SND_SOC_DAPM_POST_PMD:
 425                 dac33_disable_digital(component);
 426                 break;
 427         }
 428         return 0;
 429 }
 430
 431 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
 432                          struct snd_ctl_elem_value *ucontrol)
 433 {
 434         struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
 435         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 436
 437         ucontrol->value.enumerated.item[0] = dac33->fifo_mode;
 438
 439         return 0;
 440 }
 441
 442 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
 443                          struct snd_ctl_elem_value *ucontrol)
 444 {
 445         struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
 446         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 447         int ret = 0;
 448
 449         if (dac33->fifo_mode == ucontrol->value.enumerated.item[0])
 450                 return 0;
 451         /* Do not allow changes while stream is running*/
 452         if (snd_soc_component_active(component))
 453                 return -EPERM;
 454
 455         if (ucontrol->value.enumerated.item[0] >= DAC33_FIFO_LAST_MODE)
 456                 ret = -EINVAL;
 457         else
 458                 dac33->fifo_mode = ucontrol->value.enumerated.item[0];
 459
 460         return ret;
 461 }
 462
 463 /* Codec operation modes */
 464 static const char *dac33_fifo_mode_texts[] = {
 465         "Bypass", "Mode 1", "Mode 7"
 466 };
 467
 468 static SOC_ENUM_SINGLE_EXT_DECL(dac33_fifo_mode_enum, dac33_fifo_mode_texts);
 469
 470 /* L/R Line Output Gain */
 471 static const char *lr_lineout_gain_texts[] = {
 472         "Line -12dB DAC 0dB", "Line -6dB DAC 6dB",
 473         "Line 0dB DAC 12dB", "Line 6dB DAC 18dB",
 474 };
 475
 476 static SOC_ENUM_SINGLE_DECL(l_lineout_gain_enum,
 477                             DAC33_LDAC_PWR_CTRL, 0,
 478                             lr_lineout_gain_texts);
 479
 480 static SOC_ENUM_SINGLE_DECL(r_lineout_gain_enum,
 481                             DAC33_RDAC_PWR_CTRL, 0,
 482                             lr_lineout_gain_texts);
 483
 484 /*
 485  * DACL/R digital volume control:
 486  * from 0 dB to -63.5 in 0.5 dB steps
 487  * Need to be inverted later on:
 488  * 0x00 == 0 dB
 489  * 0x7f == -63.5 dB
 490  */
 491 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
 492
 493 static const struct snd_kcontrol_new dac33_snd_controls[] = {
 494         SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
 495                 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
 496                 0, 0x7f, 1, dac_digivol_tlv),
 497         SOC_DOUBLE_R("DAC Digital Playback Switch",
 498                  DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
 499         SOC_DOUBLE_R("Line to Line Out Volume",
 500                  DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
 501         SOC_ENUM("Left Line Output Gain", l_lineout_gain_enum),
 502         SOC_ENUM("Right Line Output Gain", r_lineout_gain_enum),
 503 };
 504
 505 static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
 506         SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
 507                  dac33_get_fifo_mode, dac33_set_fifo_mode),
 508 };
 509
 510 /* Analog bypass */
 511 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
 512         SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
 513
 514 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
 515         SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
 516
 517 /* LOP L/R invert selection */
 518 static const char *dac33_lr_lom_texts[] = {"DAC", "LOP"};
 519
 520 static SOC_ENUM_SINGLE_DECL(dac33_left_lom_enum,
 521                             DAC33_OUT_AMP_CTRL, 3,
 522                             dac33_lr_lom_texts);
 523
 524 static const struct snd_kcontrol_new dac33_dapm_left_lom_control =
 525 SOC_DAPM_ENUM("Route", dac33_left_lom_enum);
 526
 527 static SOC_ENUM_SINGLE_DECL(dac33_right_lom_enum,
 528                             DAC33_OUT_AMP_CTRL, 2,
 529                             dac33_lr_lom_texts);
 530
 531 static const struct snd_kcontrol_new dac33_dapm_right_lom_control =
 532 SOC_DAPM_ENUM("Route", dac33_right_lom_enum);
 533
 534 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
 535         SND_SOC_DAPM_OUTPUT("LEFT_LO"),
 536         SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
 537
 538         SND_SOC_DAPM_INPUT("LINEL"),
 539         SND_SOC_DAPM_INPUT("LINER"),
 540
 541         SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
 542         SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),
 543
 544         /* Analog bypass */
 545         SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
 546                                 &dac33_dapm_abypassl_control),
 547         SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
 548                                 &dac33_dapm_abypassr_control),
 549
 550         SND_SOC_DAPM_MUX("Left LOM Inverted From", SND_SOC_NOPM, 0, 0,
 551                 &dac33_dapm_left_lom_control),
 552         SND_SOC_DAPM_MUX("Right LOM Inverted From", SND_SOC_NOPM, 0, 0,
 553                 &dac33_dapm_right_lom_control),
 554         /*
 555          * For DAPM path, when only the anlog bypass path is enabled, and the
 556          * LOP inverted from the corresponding DAC side.
 557          * This is needed, so we can attach the DAC power supply in this case.
 558          */
 559         SND_SOC_DAPM_PGA("Left Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 560         SND_SOC_DAPM_PGA("Right Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
 561
 562         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amplifier",
 563                          DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
 564         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amplifier",
 565                          DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
 566
 567         SND_SOC_DAPM_SUPPLY("Left DAC Power",
 568                             DAC33_LDAC_PWR_CTRL, 2, 0, NULL, 0),
 569         SND_SOC_DAPM_SUPPLY("Right DAC Power",
 570                             DAC33_RDAC_PWR_CTRL, 2, 0, NULL, 0),
 571
 572         SND_SOC_DAPM_SUPPLY("Codec Power",
 573                             DAC33_PWR_CTRL, 4, 0, NULL, 0),
 574
 575         SND_SOC_DAPM_PRE("Pre Playback", dac33_playback_event),
 576         SND_SOC_DAPM_POST("Post Playback", dac33_playback_event),
 577 };
 578
 579 static const struct snd_soc_dapm_route audio_map[] = {
 580         /* Analog bypass */
 581         {"Analog Left Bypass", "Switch", "LINEL"},
 582         {"Analog Right Bypass", "Switch", "LINER"},
 583
 584         {"Output Left Amplifier", NULL, "DACL"},
 585         {"Output Right Amplifier", NULL, "DACR"},
 586
 587         {"Left Bypass PGA", NULL, "Analog Left Bypass"},
 588         {"Right Bypass PGA", NULL, "Analog Right Bypass"},
 589
 590         {"Left LOM Inverted From", "DAC", "Left Bypass PGA"},
 591         {"Right LOM Inverted From", "DAC", "Right Bypass PGA"},
 592         {"Left LOM Inverted From", "LOP", "Analog Left Bypass"},
 593         {"Right LOM Inverted From", "LOP", "Analog Right Bypass"},
 594
 595         {"Output Left Amplifier", NULL, "Left LOM Inverted From"},
 596         {"Output Right Amplifier", NULL, "Right LOM Inverted From"},
 597
 598         {"DACL", NULL, "Left DAC Power"},
 599         {"DACR", NULL, "Right DAC Power"},
 600
 601         {"Left Bypass PGA", NULL, "Left DAC Power"},
 602         {"Right Bypass PGA", NULL, "Right DAC Power"},
 603
 604         /* output */
 605         {"LEFT_LO", NULL, "Output Left Amplifier"},
 606         {"RIGHT_LO", NULL, "Output Right Amplifier"},
 607
 608         {"LEFT_LO", NULL, "Codec Power"},
 609         {"RIGHT_LO", NULL, "Codec Power"},
 610 };
 611
 612 static int dac33_set_bias_level(struct snd_soc_component *component,
 613                                 enum snd_soc_bias_level level)
 614 {
 615         int ret;
 616
 617         switch (level) {
 618         case SND_SOC_BIAS_ON:
 619                 break;
 620         case SND_SOC_BIAS_PREPARE:
 621                 break;
 622         case SND_SOC_BIAS_STANDBY:
 623                 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
 624                         /* Coming from OFF, switch on the component */
 625                         ret = dac33_hard_power(component, 1);
 626                         if (ret != 0)
 627                                 return ret;
 628
 629                         dac33_init_chip(component);
 630                 }
 631                 break;
 632         case SND_SOC_BIAS_OFF:
 633                 /* Do not power off, when the component is already off */
 634                 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)
 635                         return 0;
 636                 ret = dac33_hard_power(component, 0);
 637                 if (ret != 0)
 638                         return ret;
 639                 break;
 640         }
 641
 642         return 0;
 643 }
 644
 645 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
 646 {
 647         struct snd_soc_component *component = dac33->component;
 648         unsigned int delay;
 649         unsigned long flags;
 650
 651         switch (dac33->fifo_mode) {
 652         case DAC33_FIFO_MODE1:
 653                 dac33_write16(component, DAC33_NSAMPLE_MSB,
 654                         DAC33_THRREG(dac33->nsample));
 655
 656                 /* Take the timestamps */
 657                 spin_lock_irqsave(&dac33->lock, flags);
 658                 dac33->t_stamp2 = ktime_to_us(ktime_get());
 659                 dac33->t_stamp1 = dac33->t_stamp2;
 660                 spin_unlock_irqrestore(&dac33->lock, flags);
 661
 662                 dac33_write16(component, DAC33_PREFILL_MSB,
 663                                 DAC33_THRREG(dac33->alarm_threshold));
 664                 /* Enable Alarm Threshold IRQ with a delay */
 665                 delay = SAMPLES_TO_US(dac33->burst_rate,
 666                                      dac33->alarm_threshold) + 1000;
 667                 usleep_range(delay, delay + 500);
 668                 dac33_write(component, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
 669                 break;
 670         case DAC33_FIFO_MODE7:
 671                 /* Take the timestamp */
 672                 spin_lock_irqsave(&dac33->lock, flags);
 673                 dac33->t_stamp1 = ktime_to_us(ktime_get());
 674                 /* Move back the timestamp with drain time */
 675                 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
 676                 spin_unlock_irqrestore(&dac33->lock, flags);
 677
 678                 dac33_write16(component, DAC33_PREFILL_MSB,
 679                                 DAC33_THRREG(DAC33_MODE7_MARGIN));
 680
 681                 /* Enable Upper Threshold IRQ */
 682                 dac33_write(component, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
 683                 break;
 684         default:
 685                 dev_warn(component->dev, "Unhandled FIFO mode: %d\n",
 686                                                         dac33->fifo_mode);
 687                 break;
 688         }
 689 }
 690
 691 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
 692 {
 693         struct snd_soc_component *component = dac33->component;
 694         unsigned long flags;
 695
 696         switch (dac33->fifo_mode) {
 697         case DAC33_FIFO_MODE1:
 698                 /* Take the timestamp */
 699                 spin_lock_irqsave(&dac33->lock, flags);
 700                 dac33->t_stamp2 = ktime_to_us(ktime_get());
 701                 spin_unlock_irqrestore(&dac33->lock, flags);
 702
 703                 dac33_write16(component, DAC33_NSAMPLE_MSB,
 704                                 DAC33_THRREG(dac33->nsample));
 705                 break;
 706         case DAC33_FIFO_MODE7:
 707                 /* At the moment we are not using interrupts in mode7 */
 708                 break;
 709         default:
 710                 dev_warn(component->dev, "Unhandled FIFO mode: %d\n",
 711                                                         dac33->fifo_mode);
 712                 break;
 713         }
 714 }
 715
 716 static void dac33_work(struct work_struct *work)
 717 {
 718         struct snd_soc_component *component;
 719         struct tlv320dac33_priv *dac33;
 720         u8 reg;
 721
 722         dac33 = container_of(work, struct tlv320dac33_priv, work);
 723         component = dac33->component;
 724
 725         mutex_lock(&dac33->mutex);
 726         switch (dac33->state) {
 727         case DAC33_PREFILL:
 728                 dac33->state = DAC33_PLAYBACK;
 729                 dac33_prefill_handler(dac33);
 730                 break;
 731         case DAC33_PLAYBACK:
 732                 dac33_playback_handler(dac33);
 733                 break;
 734         case DAC33_IDLE:
 735                 break;
 736         case DAC33_FLUSH:
 737                 dac33->state = DAC33_IDLE;
 738                 /* Mask all interrupts from dac33 */
 739                 dac33_write(component, DAC33_FIFO_IRQ_MASK, 0);
 740
 741                 /* flush fifo */
 742                 reg = dac33_read_reg_cache(component, DAC33_FIFO_CTRL_A);
 743                 reg |= DAC33_FIFOFLUSH;
 744                 dac33_write(component, DAC33_FIFO_CTRL_A, reg);
 745                 break;
 746         }
 747         mutex_unlock(&dac33->mutex);
 748 }
 749
 750 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
 751 {
 752         struct snd_soc_component *component = dev;
 753         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 754         unsigned long flags;
 755
 756         spin_lock_irqsave(&dac33->lock, flags);
 757         dac33->t_stamp1 = ktime_to_us(ktime_get());
 758         spin_unlock_irqrestore(&dac33->lock, flags);
 759
 760         /* Do not schedule the workqueue in Mode7 */
 761         if (dac33->fifo_mode != DAC33_FIFO_MODE7)
 762                 schedule_work(&dac33->work);
 763
 764         return IRQ_HANDLED;
 765 }
 766
 767 static void dac33_oscwait(struct snd_soc_component *component)
 768 {
 769         int timeout = 60;
 770         u8 reg;
 771
 772         do {
 773                 usleep_range(1000, 2000);
 774                 dac33_read(component, DAC33_INT_OSC_STATUS, &reg);
 775         } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
 776         if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
 777                 dev_err(component->dev,
 778                         "internal oscillator calibration failed\n");
 779 }
 780
 781 static int dac33_startup(struct snd_pcm_substream *substream,
 782                            struct snd_soc_dai *dai)
 783 {
 784         struct snd_soc_component *component = dai->component;
 785         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 786
 787         /* Stream started, save the substream pointer */
 788         dac33->substream = substream;
 789
 790         return 0;
 791 }
 792
 793 static void dac33_shutdown(struct snd_pcm_substream *substream,
 794                              struct snd_soc_dai *dai)
 795 {
 796         struct snd_soc_component *component = dai->component;
 797         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 798
 799         dac33->substream = NULL;
 800 }
 801
 802 #define CALC_BURST_RATE(bclkdiv, bclk_per_sample) \
 803         (BURST_BASEFREQ_HZ / bclkdiv / bclk_per_sample)
 804 static int dac33_hw_params(struct snd_pcm_substream *substream,
 805                            struct snd_pcm_hw_params *params,
 806                            struct snd_soc_dai *dai)
 807 {
 808         struct snd_soc_component *component = dai->component;
 809         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 810
 811         /* Check parameters for validity */
 812         switch (params_rate(params)) {
 813         case 44100:
 814         case 48000:
 815                 break;
 816         default:
 817                 dev_err(component->dev, "unsupported rate %d\n",
 818                         params_rate(params));
 819                 return -EINVAL;
 820         }
 821
 822         switch (params_width(params)) {
 823         case 16:
 824                 dac33->fifo_size = DAC33_FIFO_SIZE_16BIT;
 825                 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 32);
 826                 break;
 827         case 32:
 828                 dac33->fifo_size = DAC33_FIFO_SIZE_24BIT;
 829                 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 64);
 830                 break;
 831         default:
 832                 dev_err(component->dev, "unsupported width %d\n",
 833                         params_width(params));
 834                 return -EINVAL;
 835         }
 836
 837         return 0;
 838 }
 839
 840 #define CALC_OSCSET(rate, refclk) ( \
 841         ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
 842 #define CALC_RATIOSET(rate, refclk) ( \
 843         ((((refclk  * 100000) / rate) * 16384) + 50000) / 100000)
 844
 845 /*
 846  * tlv320dac33 is strict on the sequence of the register writes, if the register
 847  * writes happens in different order, than dac33 might end up in unknown state.
 848  * Use the known, working sequence of register writes to initialize the dac33.
 849  */
 850 static int dac33_prepare_chip(struct snd_pcm_substream *substream,
 851                               struct snd_soc_component *component)
 852 {
 853         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
 854         unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
 855         u8 aictrl_a, aictrl_b, fifoctrl_a;
 856
 857         switch (substream->runtime->rate) {
 858         case 44100:
 859         case 48000:
 860                 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
 861                 ratioset = CALC_RATIOSET(substream->runtime->rate,
 862                                          dac33->refclk);
 863                 break;
 864         default:
 865                 dev_err(component->dev, "unsupported rate %d\n",
 866                         substream->runtime->rate);
 867                 return -EINVAL;
 868         }
 869
 870
 871         aictrl_a = dac33_read_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_A);
 872         aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
 873         /* Read FIFO control A, and clear FIFO flush bit */
 874         fifoctrl_a = dac33_read_reg_cache(component, DAC33_FIFO_CTRL_A);
 875         fifoctrl_a &= ~DAC33_FIFOFLUSH;
 876
 877         fifoctrl_a &= ~DAC33_WIDTH;
 878         switch (substream->runtime->format) {
 879         case SNDRV_PCM_FORMAT_S16_LE:
 880                 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
 881                 fifoctrl_a |= DAC33_WIDTH;
 882                 break;
 883         case SNDRV_PCM_FORMAT_S32_LE:
 884                 aictrl_a |= (DAC33_NCYCL_32 | DAC33_WLEN_24);
 885                 break;
 886         default:
 887                 dev_err(component->dev, "unsupported format %d\n",
 888                         substream->runtime->format);
 889                 return -EINVAL;
 890         }
 891
 892         mutex_lock(&dac33->mutex);
 893
 894         if (!dac33->chip_power) {
 895                 /*
 896                  * Chip is not powered yet.
 897                  * Do the init in the dac33_set_bias_level later.
 898                  */
 899                 mutex_unlock(&dac33->mutex);
 900                 return 0;
 901         }
 902
 903         dac33_soft_power(component, 0);
 904         dac33_soft_power(component, 1);
 905
 906         reg_tmp = dac33_read_reg_cache(component, DAC33_INT_OSC_CTRL);
 907         dac33_write(component, DAC33_INT_OSC_CTRL, reg_tmp);
 908
 909         /* Write registers 0x08 and 0x09 (MSB, LSB) */
 910         dac33_write16(component, DAC33_INT_OSC_FREQ_RAT_A, oscset);
 911
 912         /* OSC calibration time */
 913         dac33_write(component, DAC33_CALIB_TIME, 96);
 914
 915         /* adjustment treshold & step */
 916         dac33_write(component, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
 917                                                  DAC33_ADJSTEP(1));
 918
 919         /* div=4 / gain=1 / div */
 920         dac33_write(component, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
 921
 922         pwr_ctrl = dac33_read_reg_cache(component, DAC33_PWR_CTRL);
 923         pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
 924         dac33_write(component, DAC33_PWR_CTRL, pwr_ctrl);
 925
 926         dac33_oscwait(component);
 927
 928         if (dac33->fifo_mode) {
 929                 /* Generic for all FIFO modes */
 930                 /* 50-51 : ASRC Control registers */
 931                 dac33_write(component, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
 932                 dac33_write(component, DAC33_ASRC_CTRL_B, 1); /* ??? */
 933
 934                 /* Write registers 0x34 and 0x35 (MSB, LSB) */
 935                 dac33_write16(component, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
 936
 937                 /* Set interrupts to high active */
 938                 dac33_write(component, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
 939         } else {
 940                 /* FIFO bypass mode */
 941                 /* 50-51 : ASRC Control registers */
 942                 dac33_write(component, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
 943                 dac33_write(component, DAC33_ASRC_CTRL_B, 0); /* ??? */
 944         }
 945
 946         /* Interrupt behaviour configuration */
 947         switch (dac33->fifo_mode) {
 948         case DAC33_FIFO_MODE1:
 949                 dac33_write(component, DAC33_FIFO_IRQ_MODE_B,
 950                             DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
 951                 break;
 952         case DAC33_FIFO_MODE7:
 953                 dac33_write(component, DAC33_FIFO_IRQ_MODE_A,
 954                         DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
 955                 break;
 956         default:
 957                 /* in FIFO bypass mode, the interrupts are not used */
 958                 break;
 959         }
 960
 961         aictrl_b = dac33_read_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_B);
 962
 963         switch (dac33->fifo_mode) {
 964         case DAC33_FIFO_MODE1:
 965                 /*
 966                  * For mode1:
 967                  * Disable the FIFO bypass (Enable the use of FIFO)
 968                  * Select nSample mode
 969                  * BCLK is only running when data is needed by DAC33
 970                  */
 971                 fifoctrl_a &= ~DAC33_FBYPAS;
 972                 fifoctrl_a &= ~DAC33_FAUTO;
 973                 if (dac33->keep_bclk)
 974                         aictrl_b |= DAC33_BCLKON;
 975                 else
 976                         aictrl_b &= ~DAC33_BCLKON;
 977                 break;
 978         case DAC33_FIFO_MODE7:
 979                 /*
 980                  * For mode1:
 981                  * Disable the FIFO bypass (Enable the use of FIFO)
 982                  * Select Threshold mode
 983                  * BCLK is only running when data is needed by DAC33
 984                  */
 985                 fifoctrl_a &= ~DAC33_FBYPAS;
 986                 fifoctrl_a |= DAC33_FAUTO;
 987                 if (dac33->keep_bclk)
 988                         aictrl_b |= DAC33_BCLKON;
 989                 else
 990                         aictrl_b &= ~DAC33_BCLKON;
 991                 break;
 992         default:
 993                 /*
 994                  * For FIFO bypass mode:
 995                  * Enable the FIFO bypass (Disable the FIFO use)
 996                  * Set the BCLK as continuous
 997                  */
 998                 fifoctrl_a |= DAC33_FBYPAS;
 999                 aictrl_b |= DAC33_BCLKON;
1000                 break;
1001         }
1002
1003         dac33_write(component, DAC33_FIFO_CTRL_A, fifoctrl_a);
1004         dac33_write(component, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1005         dac33_write(component, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1006
1007         /*
1008          * BCLK divide ratio
1009          * 0: 1.5
1010          * 1: 1
1011          * 2: 2
1012          * ...
1013          * 254: 254
1014          * 255: 255
1015          */
1016         if (dac33->fifo_mode)
1017                 dac33_write(component, DAC33_SER_AUDIOIF_CTRL_C,
1018                                                         dac33->burst_bclkdiv);
1019         else
1020                 if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE)
1021                         dac33_write(component, DAC33_SER_AUDIOIF_CTRL_C, 32);
1022                 else
1023                         dac33_write(component, DAC33_SER_AUDIOIF_CTRL_C, 16);
1024
1025         switch (dac33->fifo_mode) {
1026         case DAC33_FIFO_MODE1:
1027                 dac33_write16(component, DAC33_ATHR_MSB,
1028                               DAC33_THRREG(dac33->alarm_threshold));
1029                 break;
1030         case DAC33_FIFO_MODE7:
1031                 /*
1032                  * Configure the threshold levels, and leave 10 sample space
1033                  * at the bottom, and also at the top of the FIFO
1034                  */
1035                 dac33_write16(component, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1036                 dac33_write16(component, DAC33_LTHR_MSB,
1037                               DAC33_THRREG(DAC33_MODE7_MARGIN));
1038                 break;
1039         default:
1040                 break;
1041         }
1042
1043         mutex_unlock(&dac33->mutex);
1044
1045         return 0;
1046 }
1047
1048 static void dac33_calculate_times(struct snd_pcm_substream *substream,
1049                                   struct snd_soc_component *component)
1050 {
1051         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1052         unsigned int period_size = substream->runtime->period_size;
1053         unsigned int rate = substream->runtime->rate;
1054         unsigned int nsample_limit;
1055
1056         /* In bypass mode we don't need to calculate */
1057         if (!dac33->fifo_mode)
1058                 return;
1059
1060         switch (dac33->fifo_mode) {
1061         case DAC33_FIFO_MODE1:
1062                 /* Number of samples under i2c latency */
1063                 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1064                                                 dac33->mode1_latency);
1065                 nsample_limit = dac33->fifo_size - dac33->alarm_threshold;
1066
1067                 if (period_size <= dac33->alarm_threshold)
1068                         /*
1069                          * Configure nSamaple to number of periods,
1070                          * which covers the latency requironment.
1071                          */
1072                         dac33->nsample = period_size *
1073                                 ((dac33->alarm_threshold / period_size) +
1074                                  ((dac33->alarm_threshold % period_size) ?
1075                                 1 : 0));
1076                 else if (period_size > nsample_limit)
1077                         dac33->nsample = nsample_limit;
1078                 else
1079                         dac33->nsample = period_size;
1080
1081                 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
1082                                                       dac33->nsample);
1083                 dac33->t_stamp1 = 0;
1084                 dac33->t_stamp2 = 0;
1085                 break;
1086         case DAC33_FIFO_MODE7:
1087                 dac33->uthr = UTHR_FROM_PERIOD_SIZE(period_size, rate,
1088                                                     dac33->burst_rate) + 9;
1089                 if (dac33->uthr > (dac33->fifo_size - DAC33_MODE7_MARGIN))
1090                         dac33->uthr = dac33->fifo_size - DAC33_MODE7_MARGIN;
1091                 if (dac33->uthr < (DAC33_MODE7_MARGIN + 10))
1092                         dac33->uthr = (DAC33_MODE7_MARGIN + 10);
1093
1094                 dac33->mode7_us_to_lthr =
1095                                 SAMPLES_TO_US(substream->runtime->rate,
1096                                         dac33->uthr - DAC33_MODE7_MARGIN + 1);
1097                 dac33->t_stamp1 = 0;
1098                 break;
1099         default:
1100                 break;
1101         }
1102
1103 }
1104
1105 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1106                              struct snd_soc_dai *dai)
1107 {
1108         struct snd_soc_component *component = dai->component;
1109         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1110         int ret = 0;
1111
1112         switch (cmd) {
1113         case SNDRV_PCM_TRIGGER_START:
1114         case SNDRV_PCM_TRIGGER_RESUME:
1115         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1116                 if (dac33->fifo_mode) {
1117                         dac33->state = DAC33_PREFILL;
1118                         schedule_work(&dac33->work);
1119                 }
1120                 break;
1121         case SNDRV_PCM_TRIGGER_STOP:
1122         case SNDRV_PCM_TRIGGER_SUSPEND:
1123         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1124                 if (dac33->fifo_mode) {
1125                         dac33->state = DAC33_FLUSH;
1126                         schedule_work(&dac33->work);
1127                 }
1128                 break;
1129         default:
1130                 ret = -EINVAL;
1131         }
1132
1133         return ret;
1134 }
1135
1136 static snd_pcm_sframes_t dac33_dai_delay(
1137                         struct snd_pcm_substream *substream,
1138                         struct snd_soc_dai *dai)
1139 {
1140         struct snd_soc_component *component = dai->component;
1141         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1142         unsigned long long t0, t1, t_now;
1143         unsigned int time_delta, uthr;
1144         int samples_out, samples_in, samples;
1145         snd_pcm_sframes_t delay = 0;
1146         unsigned long flags;
1147
1148         switch (dac33->fifo_mode) {
1149         case DAC33_FIFO_BYPASS:
1150                 break;
1151         case DAC33_FIFO_MODE1:
1152                 spin_lock_irqsave(&dac33->lock, flags);
1153                 t0 = dac33->t_stamp1;
1154                 t1 = dac33->t_stamp2;
1155                 spin_unlock_irqrestore(&dac33->lock, flags);
1156                 t_now = ktime_to_us(ktime_get());
1157
1158                 /* We have not started to fill the FIFO yet, delay is 0 */
1159                 if (!t1)
1160                         goto out;
1161
1162                 if (t0 > t1) {
1163                         /*
1164                          * Phase 1:
1165                          * After Alarm threshold, and before nSample write
1166                          */
1167                         time_delta = t_now - t0;
1168                         samples_out = time_delta ? US_TO_SAMPLES(
1169                                                 substream->runtime->rate,
1170                                                 time_delta) : 0;
1171
1172                         if (likely(dac33->alarm_threshold > samples_out))
1173                                 delay = dac33->alarm_threshold - samples_out;
1174                         else
1175                                 delay = 0;
1176                 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1177                         /*
1178                          * Phase 2:
1179                          * After nSample write (during burst operation)
1180                          */
1181                         time_delta = t_now - t0;
1182                         samples_out = time_delta ? US_TO_SAMPLES(
1183                                                 substream->runtime->rate,
1184                                                 time_delta) : 0;
1185
1186                         time_delta = t_now - t1;
1187                         samples_in = time_delta ? US_TO_SAMPLES(
1188                                                 dac33->burst_rate,
1189                                                 time_delta) : 0;
1190
1191                         samples = dac33->alarm_threshold;
1192                         samples += (samples_in - samples_out);
1193
1194                         if (likely(samples > 0))
1195                                 delay = samples;
1196                         else
1197                                 delay = 0;
1198                 } else {
1199                         /*
1200                          * Phase 3:
1201                          * After burst operation, before next alarm threshold
1202                          */
1203                         time_delta = t_now - t0;
1204                         samples_out = time_delta ? US_TO_SAMPLES(
1205                                                 substream->runtime->rate,
1206                                                 time_delta) : 0;
1207
1208                         samples_in = dac33->nsample;
1209                         samples = dac33->alarm_threshold;
1210                         samples += (samples_in - samples_out);
1211
1212                         if (likely(samples > 0))
1213                                 delay = samples > dac33->fifo_size ?
1214                                         dac33->fifo_size : samples;
1215                         else
1216                                 delay = 0;
1217                 }
1218                 break;
1219         case DAC33_FIFO_MODE7:
1220                 spin_lock_irqsave(&dac33->lock, flags);
1221                 t0 = dac33->t_stamp1;
1222                 uthr = dac33->uthr;
1223                 spin_unlock_irqrestore(&dac33->lock, flags);
1224                 t_now = ktime_to_us(ktime_get());
1225
1226                 /* We have not started to fill the FIFO yet, delay is 0 */
1227                 if (!t0)
1228                         goto out;
1229
1230                 if (t_now <= t0) {
1231                         /*
1232                          * Either the timestamps are messed or equal. Report
1233                          * maximum delay
1234                          */
1235                         delay = uthr;
1236                         goto out;
1237                 }
1238
1239                 time_delta = t_now - t0;
1240                 if (time_delta <= dac33->mode7_us_to_lthr) {
1241                         /*
1242                         * Phase 1:
1243                         * After burst (draining phase)
1244                         */
1245                         samples_out = US_TO_SAMPLES(
1246                                         substream->runtime->rate,
1247                                         time_delta);
1248
1249                         if (likely(uthr > samples_out))
1250                                 delay = uthr - samples_out;
1251                         else
1252                                 delay = 0;
1253                 } else {
1254                         /*
1255                         * Phase 2:
1256                         * During burst operation
1257                         */
1258                         time_delta = time_delta - dac33->mode7_us_to_lthr;
1259
1260                         samples_out = US_TO_SAMPLES(
1261                                         substream->runtime->rate,
1262                                         time_delta);
1263                         samples_in = US_TO_SAMPLES(
1264                                         dac33->burst_rate,
1265                                         time_delta);
1266                         delay = DAC33_MODE7_MARGIN + samples_in - samples_out;
1267
1268                         if (unlikely(delay > uthr))
1269                                 delay = uthr;
1270                 }
1271                 break;
1272         default:
1273                 dev_warn(component->dev, "Unhandled FIFO mode: %d\n",
1274                                                         dac33->fifo_mode);
1275                 break;
1276         }
1277 out:
1278         return delay;
1279 }
1280
1281 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1282                 int clk_id, unsigned int freq, int dir)
1283 {
1284         struct snd_soc_component *component = codec_dai->component;
1285         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1286         u8 ioc_reg, asrcb_reg;
1287
1288         ioc_reg = dac33_read_reg_cache(component, DAC33_INT_OSC_CTRL);
1289         asrcb_reg = dac33_read_reg_cache(component, DAC33_ASRC_CTRL_B);
1290         switch (clk_id) {
1291         case TLV320DAC33_MCLK:
1292                 ioc_reg |= DAC33_REFSEL;
1293                 asrcb_reg |= DAC33_SRCREFSEL;
1294                 break;
1295         case TLV320DAC33_SLEEPCLK:
1296                 ioc_reg &= ~DAC33_REFSEL;
1297                 asrcb_reg &= ~DAC33_SRCREFSEL;
1298                 break;
1299         default:
1300                 dev_err(component->dev, "Invalid clock ID (%d)\n", clk_id);
1301                 break;
1302         }
1303         dac33->refclk = freq;
1304
1305         dac33_write_reg_cache(component, DAC33_INT_OSC_CTRL, ioc_reg);
1306         dac33_write_reg_cache(component, DAC33_ASRC_CTRL_B, asrcb_reg);
1307
1308         return 0;
1309 }
1310
1311 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1312                              unsigned int fmt)
1313 {
1314         struct snd_soc_component *component = codec_dai->component;
1315         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1316         u8 aictrl_a, aictrl_b;
1317
1318         aictrl_a = dac33_read_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_A);
1319         aictrl_b = dac33_read_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_B);
1320         /* set master/slave audio interface */
1321         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1322         case SND_SOC_DAIFMT_CBM_CFM:
1323                 /* Codec Master */
1324                 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1325                 break;
1326         case SND_SOC_DAIFMT_CBS_CFS:
1327                 /* Codec Slave */
1328                 if (dac33->fifo_mode) {
1329                         dev_err(component->dev, "FIFO mode requires master mode\n");
1330                         return -EINVAL;
1331                 } else
1332                         aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1333                 break;
1334         default:
1335                 return -EINVAL;
1336         }
1337
1338         aictrl_a &= ~DAC33_AFMT_MASK;
1339         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1340         case SND_SOC_DAIFMT_I2S:
1341                 aictrl_a |= DAC33_AFMT_I2S;
1342                 break;
1343         case SND_SOC_DAIFMT_DSP_A:
1344                 aictrl_a |= DAC33_AFMT_DSP;
1345                 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1346                 aictrl_b |= DAC33_DATA_DELAY(0);
1347                 break;
1348         case SND_SOC_DAIFMT_RIGHT_J:
1349                 aictrl_a |= DAC33_AFMT_RIGHT_J;
1350                 break;
1351         case SND_SOC_DAIFMT_LEFT_J:
1352                 aictrl_a |= DAC33_AFMT_LEFT_J;
1353                 break;
1354         default:
1355                 dev_err(component->dev, "Unsupported format (%u)\n",
1356                         fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1357                 return -EINVAL;
1358         }
1359
1360         dac33_write_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1361         dac33_write_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1362
1363         return 0;
1364 }
1365
1366 static int dac33_soc_probe(struct snd_soc_component *component)
1367 {
1368         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1369         int ret = 0;
1370
1371         dac33->component = component;
1372
1373         /* Read the tlv320dac33 ID registers */
1374         ret = dac33_hard_power(component, 1);
1375         if (ret != 0) {
1376                 dev_err(component->dev, "Failed to power up component: %d\n", ret);
1377                 goto err_power;
1378         }
1379         ret = dac33_read_id(component);
1380         dac33_hard_power(component, 0);
1381
1382         if (ret < 0) {
1383                 dev_err(component->dev, "Failed to read chip ID: %d\n", ret);
1384                 ret = -ENODEV;
1385                 goto err_power;
1386         }
1387
1388         /* Check if the IRQ number is valid and request it */
1389         if (dac33->irq >= 0) {
1390                 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1391                                   IRQF_TRIGGER_RISING,
1392                                   component->name, component);
1393                 if (ret < 0) {
1394                         dev_err(component->dev, "Could not request IRQ%d (%d)\n",
1395                                                 dac33->irq, ret);
1396                         dac33->irq = -1;
1397                 }
1398                 if (dac33->irq != -1) {
1399                         INIT_WORK(&dac33->work, dac33_work);
1400                 }
1401         }
1402
1403         /* Only add the FIFO controls, if we have valid IRQ number */
1404         if (dac33->irq >= 0)
1405                 snd_soc_add_component_controls(component, dac33_mode_snd_controls,
1406                                      ARRAY_SIZE(dac33_mode_snd_controls));
1407
1408 err_power:
1409         return ret;
1410 }
1411
1412 static void dac33_soc_remove(struct snd_soc_component *component)
1413 {
1414         struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1415
1416         if (dac33->irq >= 0) {
1417                 free_irq(dac33->irq, dac33->component);
1418                 flush_work(&dac33->work);
1419         }
1420 }
1421
1422 static const struct snd_soc_component_driver soc_component_dev_tlv320dac33 = {
1423         .read                   = dac33_read_reg_cache,
1424         .write                  = dac33_write_locked,
1425         .set_bias_level         = dac33_set_bias_level,
1426         .probe                  = dac33_soc_probe,
1427         .remove                 = dac33_soc_remove,
1428         .controls               = dac33_snd_controls,
1429         .num_controls           = ARRAY_SIZE(dac33_snd_controls),
1430         .dapm_widgets           = dac33_dapm_widgets,
1431         .num_dapm_widgets       = ARRAY_SIZE(dac33_dapm_widgets),
1432         .dapm_routes            = audio_map,
1433         .num_dapm_routes        = ARRAY_SIZE(audio_map),
1434         .use_pmdown_time        = 1,
1435         .endianness             = 1,
1436         .non_legacy_dai_naming  = 1,
1437 };
1438
1439 #define DAC33_RATES     (SNDRV_PCM_RATE_44100 | \
1440                          SNDRV_PCM_RATE_48000)
1441 #define DAC33_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
1442
1443 static const struct snd_soc_dai_ops dac33_dai_ops = {
1444         .startup        = dac33_startup,
1445         .shutdown       = dac33_shutdown,
1446         .hw_params      = dac33_hw_params,
1447         .trigger        = dac33_pcm_trigger,
1448         .delay          = dac33_dai_delay,
1449         .set_sysclk     = dac33_set_dai_sysclk,
1450         .set_fmt        = dac33_set_dai_fmt,
1451 };
1452
1453 static struct snd_soc_dai_driver dac33_dai = {
1454         .name = "tlv320dac33-hifi",
1455         .playback = {
1456                 .stream_name = "Playback",
1457                 .channels_min = 2,
1458                 .channels_max = 2,
1459                 .rates = DAC33_RATES,
1460                 .formats = DAC33_FORMATS,
1461                 .sig_bits = 24,
1462         },
1463         .ops = &dac33_dai_ops,
1464 };
1465
1466 static int dac33_i2c_probe(struct i2c_client *client)
1467 {
1468         struct tlv320dac33_platform_data *pdata;
1469         struct tlv320dac33_priv *dac33;
1470         int ret, i;
1471
1472         if (client->dev.platform_data == NULL) {
1473                 dev_err(&client->dev, "Platform data not set\n");
1474                 return -ENODEV;
1475         }
1476         pdata = client->dev.platform_data;
1477
1478         dac33 = devm_kzalloc(&client->dev, sizeof(struct tlv320dac33_priv),
1479                              GFP_KERNEL);
1480         if (dac33 == NULL)
1481                 return -ENOMEM;
1482
1483         dac33->reg_cache = devm_kmemdup(&client->dev,
1484                                         dac33_reg,
1485                                         ARRAY_SIZE(dac33_reg) * sizeof(u8),
1486                                         GFP_KERNEL);
1487         if (!dac33->reg_cache)
1488                 return -ENOMEM;
1489
1490         dac33->i2c = client;
1491         mutex_init(&dac33->mutex);
1492         spin_lock_init(&dac33->lock);
1493
1494         i2c_set_clientdata(client, dac33);
1495
1496         dac33->power_gpio = pdata->power_gpio;
1497         dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1498         dac33->keep_bclk = pdata->keep_bclk;
1499         dac33->mode1_latency = pdata->mode1_latency;
1500         if (!dac33->mode1_latency)
1501                 dac33->mode1_latency = 10000; /* 10ms */
1502         dac33->irq = client->irq;
1503         /* Disable FIFO use by default */
1504         dac33->fifo_mode = DAC33_FIFO_BYPASS;
1505
1506         /* Check if the reset GPIO number is valid and request it */
1507         if (dac33->power_gpio >= 0) {
1508                 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1509                 if (ret < 0) {
1510                         dev_err(&client->dev,
1511                                 "Failed to request reset GPIO (%d)\n",
1512                                 dac33->power_gpio);
1513                         goto err_gpio;
1514                 }
1515                 gpio_direction_output(dac33->power_gpio, 0);
1516         }
1517
1518         for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1519                 dac33->supplies[i].supply = dac33_supply_names[i];
1520
1521         ret = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
1522                                  dac33->supplies);
1523
1524         if (ret != 0) {
1525                 dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
1526                 goto err_get;
1527         }
1528
1529         ret = devm_snd_soc_register_component(&client->dev,
1530                         &soc_component_dev_tlv320dac33, &dac33_dai, 1);
1531         if (ret < 0)
1532                 goto err_get;
1533
1534         return ret;
1535 err_get:
1536         if (dac33->power_gpio >= 0)
1537                 gpio_free(dac33->power_gpio);
1538 err_gpio:
1539         return ret;
1540 }
1541
1542 static int dac33_i2c_remove(struct i2c_client *client)
1543 {
1544         struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
1545
1546         if (unlikely(dac33->chip_power))
1547                 dac33_hard_power(dac33->component, 0);
1548
1549         if (dac33->power_gpio >= 0)
1550                 gpio_free(dac33->power_gpio);
1551
1552         return 0;
1553 }
1554
1555 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1556         {
1557                 .name = "tlv320dac33",
1558                 .driver_data = 0,
1559         },
1560         { },
1561 };
1562 MODULE_DEVICE_TABLE(i2c, tlv320dac33_i2c_id);
1563
1564 static struct i2c_driver tlv320dac33_i2c_driver = {
1565         .driver = {
1566                 .name = "tlv320dac33-codec",
1567         },
1568         .probe_new      = dac33_i2c_probe,
1569         .remove         = dac33_i2c_remove,
1570         .id_table       = tlv320dac33_i2c_id,
1571 };
1572
1573 module_i2c_driver(tlv320dac33_i2c_driver);
1574
1575 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1576 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
1577 MODULE_LICENSE("GPL");