1 /* 2 * ALSA SoC Texas Instruments TLV320DAC33 codec driver 3 * 4 * Author: Peter Ujfalusi <peter.ujfalusi@ti.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/interrupt.h> 31 #include <linux/gpio.h> 32 #include <linux/regulator/consumer.h> 33 #include <linux/slab.h> 34 #include <sound/core.h> 35 #include <sound/pcm.h> 36 #include <sound/pcm_params.h> 37 #include <sound/soc.h> 38 #include <sound/initval.h> 39 #include <sound/tlv.h> 40 41 #include <sound/tlv320dac33-plat.h> 42 #include "tlv320dac33.h" 43 44 /* 45 * The internal FIFO is 24576 bytes long 46 * It can be configured to hold 16bit or 24bit samples 47 * In 16bit configuration the FIFO can hold 6144 stereo samples 48 * In 24bit configuration the FIFO can hold 4096 stereo samples 49 */ 50 #define DAC33_FIFO_SIZE_16BIT 6144 51 #define DAC33_FIFO_SIZE_24BIT 4096 52 #define DAC33_MODE7_MARGIN 10 /* Safety margin for FIFO in Mode7 */ 53 54 #define BURST_BASEFREQ_HZ 49152000 55 56 #define SAMPLES_TO_US(rate, samples) \ 57 (1000000000 / (((rate) * 1000) / (samples))) 58 59 #define US_TO_SAMPLES(rate, us) \ 60 ((rate) / (1000000 / ((us) < 1000000 ? (us) : 1000000))) 61 62 #define UTHR_FROM_PERIOD_SIZE(samples, playrate, burstrate) \ 63 (((samples)*5000) / (((burstrate)*5000) / ((burstrate) - (playrate)))) 64 65 static void dac33_calculate_times(struct snd_pcm_substream *substream, 66 struct snd_soc_codec *codec); 67 static int dac33_prepare_chip(struct snd_pcm_substream *substream, 68 struct snd_soc_codec *codec); 69 70 enum dac33_state { 71 DAC33_IDLE = 0, 72 DAC33_PREFILL, 73 DAC33_PLAYBACK, 74 DAC33_FLUSH, 75 }; 76 77 enum dac33_fifo_modes { 78 DAC33_FIFO_BYPASS = 0, 79 DAC33_FIFO_MODE1, 80 DAC33_FIFO_MODE7, 81 DAC33_FIFO_LAST_MODE, 82 }; 83 84 #define DAC33_NUM_SUPPLIES 3 85 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = { 86 "AVDD", 87 "DVDD", 88 "IOVDD", 89 }; 90 91 struct tlv320dac33_priv { 92 struct mutex mutex; 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 enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */ 104 unsigned int fifo_size; /* Size of the FIFO in samples */ 105 unsigned int nsample; /* burst read amount from host */ 106 int mode1_latency; /* latency caused by the i2c writes in 107 * us */ 108 u8 burst_bclkdiv; /* BCLK divider value in burst mode */ 109 u8 *reg_cache; 110 unsigned int burst_rate; /* Interface speed in Burst modes */ 111 112 int keep_bclk; /* Keep the BCLK continuously running 113 * in FIFO modes */ 114 spinlock_t lock; 115 unsigned long long t_stamp1; /* Time stamp for FIFO modes to */ 116 unsigned long long t_stamp2; /* calculate the FIFO caused delay */ 117 118 unsigned int mode1_us_burst; /* Time to burst read n number of 119 * samples */ 120 unsigned int mode7_us_to_lthr; /* Time to reach lthr from uthr */ 121 122 unsigned int uthr; 123 124 enum dac33_state state; 125 struct i2c_client *i2c; 126 }; 127 128 static const u8 dac33_reg[DAC33_CACHEREGNUM] = { 129 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */ 130 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */ 131 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */ 132 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */ 133 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */ 134 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */ 135 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */ 136 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */ 137 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */ 138 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */ 139 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */ 140 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */ 141 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */ 142 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */ 143 0x00, 0x00, /* 0x38 - 0x39 */ 144 /* Registers 0x3a - 0x3f are reserved */ 145 0x00, 0x00, /* 0x3a - 0x3b */ 146 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */ 147 148 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */ 149 0x00, 0x80, /* 0x44 - 0x45 */ 150 /* Registers 0x46 - 0x47 are reserved */ 151 0x80, 0x80, /* 0x46 - 0x47 */ 152 153 0x80, 0x00, 0x00, /* 0x48 - 0x4a */ 154 /* Registers 0x4b - 0x7c are reserved */ 155 0x00, /* 0x4b */ 156 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */ 157 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */ 158 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */ 159 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */ 160 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */ 161 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */ 162 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */ 163 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */ 164 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */ 165 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */ 166 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */ 167 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */ 168 0x00, /* 0x7c */ 169 170 0xda, 0x33, 0x03, /* 0x7d - 0x7f */ 171 }; 172 173 /* Register read and write */ 174 static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec, 175 unsigned reg) 176 { 177 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 178 u8 *cache = dac33->reg_cache; 179 if (reg >= DAC33_CACHEREGNUM) 180 return 0; 181 182 return cache[reg]; 183 } 184 185 static inline void dac33_write_reg_cache(struct snd_soc_codec *codec, 186 u8 reg, u8 value) 187 { 188 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 189 u8 *cache = dac33->reg_cache; 190 if (reg >= DAC33_CACHEREGNUM) 191 return; 192 193 cache[reg] = value; 194 } 195 196 static int dac33_read(struct snd_soc_codec *codec, unsigned int reg, 197 u8 *value) 198 { 199 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 200 int val, ret = 0; 201 202 *value = reg & 0xff; 203 204 /* If powered off, return the cached value */ 205 if (dac33->chip_power) { 206 val = i2c_smbus_read_byte_data(dac33->i2c, value[0]); 207 if (val < 0) { 208 dev_err(codec->dev, "Read failed (%d)\n", val); 209 value[0] = dac33_read_reg_cache(codec, reg); 210 ret = val; 211 } else { 212 value[0] = val; 213 dac33_write_reg_cache(codec, reg, val); 214 } 215 } else { 216 value[0] = dac33_read_reg_cache(codec, reg); 217 } 218 219 return ret; 220 } 221 222 static int dac33_write(struct snd_soc_codec *codec, unsigned int reg, 223 unsigned int value) 224 { 225 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 226 u8 data[2]; 227 int ret = 0; 228 229 /* 230 * data is 231 * D15..D8 dac33 register offset 232 * D7...D0 register data 233 */ 234 data[0] = reg & 0xff; 235 data[1] = value & 0xff; 236 237 dac33_write_reg_cache(codec, data[0], data[1]); 238 if (dac33->chip_power) { 239 ret = i2c_master_send(dac33->i2c, data, 2); 240 if (ret != 2) 241 dev_err(codec->dev, "Write failed (%d)\n", ret); 242 else 243 ret = 0; 244 } 245 246 return ret; 247 } 248 249 static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg, 250 unsigned int value) 251 { 252 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 253 int ret; 254 255 mutex_lock(&dac33->mutex); 256 ret = dac33_write(codec, reg, value); 257 mutex_unlock(&dac33->mutex); 258 259 return ret; 260 } 261 262 #define DAC33_I2C_ADDR_AUTOINC 0x80 263 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg, 264 unsigned int value) 265 { 266 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 267 u8 data[3]; 268 int ret = 0; 269 270 /* 271 * data is 272 * D23..D16 dac33 register offset 273 * D15..D8 register data MSB 274 * D7...D0 register data LSB 275 */ 276 data[0] = reg & 0xff; 277 data[1] = (value >> 8) & 0xff; 278 data[2] = value & 0xff; 279 280 dac33_write_reg_cache(codec, data[0], data[1]); 281 dac33_write_reg_cache(codec, data[0] + 1, data[2]); 282 283 if (dac33->chip_power) { 284 /* We need to set autoincrement mode for 16 bit writes */ 285 data[0] |= DAC33_I2C_ADDR_AUTOINC; 286 ret = i2c_master_send(dac33->i2c, data, 3); 287 if (ret != 3) 288 dev_err(codec->dev, "Write failed (%d)\n", ret); 289 else 290 ret = 0; 291 } 292 293 return ret; 294 } 295 296 static void dac33_init_chip(struct snd_soc_codec *codec) 297 { 298 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 299 300 if (unlikely(!dac33->chip_power)) 301 return; 302 303 /* A : DAC sample rate Fsref/1.5 */ 304 dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(0)); 305 /* B : DAC src=normal, not muted */ 306 dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT | 307 DAC33_DACSRCL_LEFT); 308 /* C : (defaults) */ 309 dac33_write(codec, DAC33_DAC_CTRL_C, 0x00); 310 311 /* 73 : volume soft stepping control, 312 clock source = internal osc (?) */ 313 dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN); 314 315 /* Restore only selected registers (gains mostly) */ 316 dac33_write(codec, DAC33_LDAC_DIG_VOL_CTRL, 317 dac33_read_reg_cache(codec, DAC33_LDAC_DIG_VOL_CTRL)); 318 dac33_write(codec, DAC33_RDAC_DIG_VOL_CTRL, 319 dac33_read_reg_cache(codec, DAC33_RDAC_DIG_VOL_CTRL)); 320 321 dac33_write(codec, DAC33_LINEL_TO_LLO_VOL, 322 dac33_read_reg_cache(codec, DAC33_LINEL_TO_LLO_VOL)); 323 dac33_write(codec, DAC33_LINER_TO_RLO_VOL, 324 dac33_read_reg_cache(codec, DAC33_LINER_TO_RLO_VOL)); 325 326 dac33_write(codec, DAC33_OUT_AMP_CTRL, 327 dac33_read_reg_cache(codec, DAC33_OUT_AMP_CTRL)); 328 329 dac33_write(codec, DAC33_LDAC_PWR_CTRL, 330 dac33_read_reg_cache(codec, DAC33_LDAC_PWR_CTRL)); 331 dac33_write(codec, DAC33_RDAC_PWR_CTRL, 332 dac33_read_reg_cache(codec, DAC33_RDAC_PWR_CTRL)); 333 } 334 335 static inline int dac33_read_id(struct snd_soc_codec *codec) 336 { 337 int i, ret = 0; 338 u8 reg; 339 340 for (i = 0; i < 3; i++) { 341 ret = dac33_read(codec, DAC33_DEVICE_ID_MSB + i, ®); 342 if (ret < 0) 343 break; 344 } 345 346 return ret; 347 } 348 349 static inline void dac33_soft_power(struct snd_soc_codec *codec, int power) 350 { 351 u8 reg; 352 353 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL); 354 if (power) 355 reg |= DAC33_PDNALLB; 356 else 357 reg &= ~(DAC33_PDNALLB | DAC33_OSCPDNB | 358 DAC33_DACRPDNB | DAC33_DACLPDNB); 359 dac33_write(codec, DAC33_PWR_CTRL, reg); 360 } 361 362 static inline void dac33_disable_digital(struct snd_soc_codec *codec) 363 { 364 u8 reg; 365 366 /* Stop the DAI clock */ 367 reg = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B); 368 reg &= ~DAC33_BCLKON; 369 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, reg); 370 371 /* Power down the Oscillator, and DACs */ 372 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL); 373 reg &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB); 374 dac33_write(codec, DAC33_PWR_CTRL, reg); 375 } 376 377 static int dac33_hard_power(struct snd_soc_codec *codec, int power) 378 { 379 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 380 int ret = 0; 381 382 mutex_lock(&dac33->mutex); 383 384 /* Safety check */ 385 if (unlikely(power == dac33->chip_power)) { 386 dev_dbg(codec->dev, "Trying to set the same power state: %s\n", 387 power ? "ON" : "OFF"); 388 goto exit; 389 } 390 391 if (power) { 392 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies), 393 dac33->supplies); 394 if (ret != 0) { 395 dev_err(codec->dev, 396 "Failed to enable supplies: %d\n", ret); 397 goto exit; 398 } 399 400 if (dac33->power_gpio >= 0) 401 gpio_set_value(dac33->power_gpio, 1); 402 403 dac33->chip_power = 1; 404 } else { 405 dac33_soft_power(codec, 0); 406 if (dac33->power_gpio >= 0) 407 gpio_set_value(dac33->power_gpio, 0); 408 409 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies), 410 dac33->supplies); 411 if (ret != 0) { 412 dev_err(codec->dev, 413 "Failed to disable supplies: %d\n", ret); 414 goto exit; 415 } 416 417 dac33->chip_power = 0; 418 } 419 420 exit: 421 mutex_unlock(&dac33->mutex); 422 return ret; 423 } 424 425 static int dac33_playback_event(struct snd_soc_dapm_widget *w, 426 struct snd_kcontrol *kcontrol, int event) 427 { 428 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm); 429 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 430 431 switch (event) { 432 case SND_SOC_DAPM_PRE_PMU: 433 if (likely(dac33->substream)) { 434 dac33_calculate_times(dac33->substream, codec); 435 dac33_prepare_chip(dac33->substream, codec); 436 } 437 break; 438 case SND_SOC_DAPM_POST_PMD: 439 dac33_disable_digital(codec); 440 break; 441 } 442 return 0; 443 } 444 445 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol, 446 struct snd_ctl_elem_value *ucontrol) 447 { 448 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 449 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 450 451 ucontrol->value.enumerated.item[0] = dac33->fifo_mode; 452 453 return 0; 454 } 455 456 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol, 457 struct snd_ctl_elem_value *ucontrol) 458 { 459 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 460 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 461 int ret = 0; 462 463 if (dac33->fifo_mode == ucontrol->value.enumerated.item[0]) 464 return 0; 465 /* Do not allow changes while stream is running*/ 466 if (snd_soc_codec_is_active(codec)) 467 return -EPERM; 468 469 if (ucontrol->value.enumerated.item[0] >= DAC33_FIFO_LAST_MODE) 470 ret = -EINVAL; 471 else 472 dac33->fifo_mode = ucontrol->value.enumerated.item[0]; 473 474 return ret; 475 } 476 477 /* Codec operation modes */ 478 static const char *dac33_fifo_mode_texts[] = { 479 "Bypass", "Mode 1", "Mode 7" 480 }; 481 482 static SOC_ENUM_SINGLE_EXT_DECL(dac33_fifo_mode_enum, dac33_fifo_mode_texts); 483 484 /* L/R Line Output Gain */ 485 static const char *lr_lineout_gain_texts[] = { 486 "Line -12dB DAC 0dB", "Line -6dB DAC 6dB", 487 "Line 0dB DAC 12dB", "Line 6dB DAC 18dB", 488 }; 489 490 static SOC_ENUM_SINGLE_DECL(l_lineout_gain_enum, 491 DAC33_LDAC_PWR_CTRL, 0, 492 lr_lineout_gain_texts); 493 494 static SOC_ENUM_SINGLE_DECL(r_lineout_gain_enum, 495 DAC33_RDAC_PWR_CTRL, 0, 496 lr_lineout_gain_texts); 497 498 /* 499 * DACL/R digital volume control: 500 * from 0 dB to -63.5 in 0.5 dB steps 501 * Need to be inverted later on: 502 * 0x00 == 0 dB 503 * 0x7f == -63.5 dB 504 */ 505 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0); 506 507 static const struct snd_kcontrol_new dac33_snd_controls[] = { 508 SOC_DOUBLE_R_TLV("DAC Digital Playback Volume", 509 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 510 0, 0x7f, 1, dac_digivol_tlv), 511 SOC_DOUBLE_R("DAC Digital Playback Switch", 512 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1), 513 SOC_DOUBLE_R("Line to Line Out Volume", 514 DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1), 515 SOC_ENUM("Left Line Output Gain", l_lineout_gain_enum), 516 SOC_ENUM("Right Line Output Gain", r_lineout_gain_enum), 517 }; 518 519 static const struct snd_kcontrol_new dac33_mode_snd_controls[] = { 520 SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum, 521 dac33_get_fifo_mode, dac33_set_fifo_mode), 522 }; 523 524 /* Analog bypass */ 525 static const struct snd_kcontrol_new dac33_dapm_abypassl_control = 526 SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1); 527 528 static const struct snd_kcontrol_new dac33_dapm_abypassr_control = 529 SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1); 530 531 /* LOP L/R invert selection */ 532 static const char *dac33_lr_lom_texts[] = {"DAC", "LOP"}; 533 534 static SOC_ENUM_SINGLE_DECL(dac33_left_lom_enum, 535 DAC33_OUT_AMP_CTRL, 3, 536 dac33_lr_lom_texts); 537 538 static const struct snd_kcontrol_new dac33_dapm_left_lom_control = 539 SOC_DAPM_ENUM("Route", dac33_left_lom_enum); 540 541 static SOC_ENUM_SINGLE_DECL(dac33_right_lom_enum, 542 DAC33_OUT_AMP_CTRL, 2, 543 dac33_lr_lom_texts); 544 545 static const struct snd_kcontrol_new dac33_dapm_right_lom_control = 546 SOC_DAPM_ENUM("Route", dac33_right_lom_enum); 547 548 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = { 549 SND_SOC_DAPM_OUTPUT("LEFT_LO"), 550 SND_SOC_DAPM_OUTPUT("RIGHT_LO"), 551 552 SND_SOC_DAPM_INPUT("LINEL"), 553 SND_SOC_DAPM_INPUT("LINER"), 554 555 SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0), 556 SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0), 557 558 /* Analog bypass */ 559 SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0, 560 &dac33_dapm_abypassl_control), 561 SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0, 562 &dac33_dapm_abypassr_control), 563 564 SND_SOC_DAPM_MUX("Left LOM Inverted From", SND_SOC_NOPM, 0, 0, 565 &dac33_dapm_left_lom_control), 566 SND_SOC_DAPM_MUX("Right LOM Inverted From", SND_SOC_NOPM, 0, 0, 567 &dac33_dapm_right_lom_control), 568 /* 569 * For DAPM path, when only the anlog bypass path is enabled, and the 570 * LOP inverted from the corresponding DAC side. 571 * This is needed, so we can attach the DAC power supply in this case. 572 */ 573 SND_SOC_DAPM_PGA("Left Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0), 574 SND_SOC_DAPM_PGA("Right Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0), 575 576 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amplifier", 577 DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0), 578 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amplifier", 579 DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0), 580 581 SND_SOC_DAPM_SUPPLY("Left DAC Power", 582 DAC33_LDAC_PWR_CTRL, 2, 0, NULL, 0), 583 SND_SOC_DAPM_SUPPLY("Right DAC Power", 584 DAC33_RDAC_PWR_CTRL, 2, 0, NULL, 0), 585 586 SND_SOC_DAPM_SUPPLY("Codec Power", 587 DAC33_PWR_CTRL, 4, 0, NULL, 0), 588 589 SND_SOC_DAPM_PRE("Pre Playback", dac33_playback_event), 590 SND_SOC_DAPM_POST("Post Playback", dac33_playback_event), 591 }; 592 593 static const struct snd_soc_dapm_route audio_map[] = { 594 /* Analog bypass */ 595 {"Analog Left Bypass", "Switch", "LINEL"}, 596 {"Analog Right Bypass", "Switch", "LINER"}, 597 598 {"Output Left Amplifier", NULL, "DACL"}, 599 {"Output Right Amplifier", NULL, "DACR"}, 600 601 {"Left Bypass PGA", NULL, "Analog Left Bypass"}, 602 {"Right Bypass PGA", NULL, "Analog Right Bypass"}, 603 604 {"Left LOM Inverted From", "DAC", "Left Bypass PGA"}, 605 {"Right LOM Inverted From", "DAC", "Right Bypass PGA"}, 606 {"Left LOM Inverted From", "LOP", "Analog Left Bypass"}, 607 {"Right LOM Inverted From", "LOP", "Analog Right Bypass"}, 608 609 {"Output Left Amplifier", NULL, "Left LOM Inverted From"}, 610 {"Output Right Amplifier", NULL, "Right LOM Inverted From"}, 611 612 {"DACL", NULL, "Left DAC Power"}, 613 {"DACR", NULL, "Right DAC Power"}, 614 615 {"Left Bypass PGA", NULL, "Left DAC Power"}, 616 {"Right Bypass PGA", NULL, "Right DAC Power"}, 617 618 /* output */ 619 {"LEFT_LO", NULL, "Output Left Amplifier"}, 620 {"RIGHT_LO", NULL, "Output Right Amplifier"}, 621 622 {"LEFT_LO", NULL, "Codec Power"}, 623 {"RIGHT_LO", NULL, "Codec Power"}, 624 }; 625 626 static int dac33_set_bias_level(struct snd_soc_codec *codec, 627 enum snd_soc_bias_level level) 628 { 629 int ret; 630 631 switch (level) { 632 case SND_SOC_BIAS_ON: 633 break; 634 case SND_SOC_BIAS_PREPARE: 635 break; 636 case SND_SOC_BIAS_STANDBY: 637 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) { 638 /* Coming from OFF, switch on the codec */ 639 ret = dac33_hard_power(codec, 1); 640 if (ret != 0) 641 return ret; 642 643 dac33_init_chip(codec); 644 } 645 break; 646 case SND_SOC_BIAS_OFF: 647 /* Do not power off, when the codec is already off */ 648 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) 649 return 0; 650 ret = dac33_hard_power(codec, 0); 651 if (ret != 0) 652 return ret; 653 break; 654 } 655 656 return 0; 657 } 658 659 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33) 660 { 661 struct snd_soc_codec *codec = dac33->codec; 662 unsigned int delay; 663 unsigned long flags; 664 665 switch (dac33->fifo_mode) { 666 case DAC33_FIFO_MODE1: 667 dac33_write16(codec, DAC33_NSAMPLE_MSB, 668 DAC33_THRREG(dac33->nsample)); 669 670 /* Take the timestamps */ 671 spin_lock_irqsave(&dac33->lock, flags); 672 dac33->t_stamp2 = ktime_to_us(ktime_get()); 673 dac33->t_stamp1 = dac33->t_stamp2; 674 spin_unlock_irqrestore(&dac33->lock, flags); 675 676 dac33_write16(codec, DAC33_PREFILL_MSB, 677 DAC33_THRREG(dac33->alarm_threshold)); 678 /* Enable Alarm Threshold IRQ with a delay */ 679 delay = SAMPLES_TO_US(dac33->burst_rate, 680 dac33->alarm_threshold) + 1000; 681 usleep_range(delay, delay + 500); 682 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT); 683 break; 684 case DAC33_FIFO_MODE7: 685 /* Take the timestamp */ 686 spin_lock_irqsave(&dac33->lock, flags); 687 dac33->t_stamp1 = ktime_to_us(ktime_get()); 688 /* Move back the timestamp with drain time */ 689 dac33->t_stamp1 -= dac33->mode7_us_to_lthr; 690 spin_unlock_irqrestore(&dac33->lock, flags); 691 692 dac33_write16(codec, DAC33_PREFILL_MSB, 693 DAC33_THRREG(DAC33_MODE7_MARGIN)); 694 695 /* Enable Upper Threshold IRQ */ 696 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT); 697 break; 698 default: 699 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n", 700 dac33->fifo_mode); 701 break; 702 } 703 } 704 705 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33) 706 { 707 struct snd_soc_codec *codec = dac33->codec; 708 unsigned long flags; 709 710 switch (dac33->fifo_mode) { 711 case DAC33_FIFO_MODE1: 712 /* Take the timestamp */ 713 spin_lock_irqsave(&dac33->lock, flags); 714 dac33->t_stamp2 = ktime_to_us(ktime_get()); 715 spin_unlock_irqrestore(&dac33->lock, flags); 716 717 dac33_write16(codec, DAC33_NSAMPLE_MSB, 718 DAC33_THRREG(dac33->nsample)); 719 break; 720 case DAC33_FIFO_MODE7: 721 /* At the moment we are not using interrupts in mode7 */ 722 break; 723 default: 724 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n", 725 dac33->fifo_mode); 726 break; 727 } 728 } 729 730 static void dac33_work(struct work_struct *work) 731 { 732 struct snd_soc_codec *codec; 733 struct tlv320dac33_priv *dac33; 734 u8 reg; 735 736 dac33 = container_of(work, struct tlv320dac33_priv, work); 737 codec = dac33->codec; 738 739 mutex_lock(&dac33->mutex); 740 switch (dac33->state) { 741 case DAC33_PREFILL: 742 dac33->state = DAC33_PLAYBACK; 743 dac33_prefill_handler(dac33); 744 break; 745 case DAC33_PLAYBACK: 746 dac33_playback_handler(dac33); 747 break; 748 case DAC33_IDLE: 749 break; 750 case DAC33_FLUSH: 751 dac33->state = DAC33_IDLE; 752 /* Mask all interrupts from dac33 */ 753 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0); 754 755 /* flush fifo */ 756 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A); 757 reg |= DAC33_FIFOFLUSH; 758 dac33_write(codec, DAC33_FIFO_CTRL_A, reg); 759 break; 760 } 761 mutex_unlock(&dac33->mutex); 762 } 763 764 static irqreturn_t dac33_interrupt_handler(int irq, void *dev) 765 { 766 struct snd_soc_codec *codec = dev; 767 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 768 unsigned long flags; 769 770 spin_lock_irqsave(&dac33->lock, flags); 771 dac33->t_stamp1 = ktime_to_us(ktime_get()); 772 spin_unlock_irqrestore(&dac33->lock, flags); 773 774 /* Do not schedule the workqueue in Mode7 */ 775 if (dac33->fifo_mode != DAC33_FIFO_MODE7) 776 schedule_work(&dac33->work); 777 778 return IRQ_HANDLED; 779 } 780 781 static void dac33_oscwait(struct snd_soc_codec *codec) 782 { 783 int timeout = 60; 784 u8 reg; 785 786 do { 787 usleep_range(1000, 2000); 788 dac33_read(codec, DAC33_INT_OSC_STATUS, ®); 789 } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--); 790 if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) 791 dev_err(codec->dev, 792 "internal oscillator calibration failed\n"); 793 } 794 795 static int dac33_startup(struct snd_pcm_substream *substream, 796 struct snd_soc_dai *dai) 797 { 798 struct snd_soc_codec *codec = dai->codec; 799 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 800 801 /* Stream started, save the substream pointer */ 802 dac33->substream = substream; 803 804 return 0; 805 } 806 807 static void dac33_shutdown(struct snd_pcm_substream *substream, 808 struct snd_soc_dai *dai) 809 { 810 struct snd_soc_codec *codec = dai->codec; 811 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 812 813 dac33->substream = NULL; 814 } 815 816 #define CALC_BURST_RATE(bclkdiv, bclk_per_sample) \ 817 (BURST_BASEFREQ_HZ / bclkdiv / bclk_per_sample) 818 static int dac33_hw_params(struct snd_pcm_substream *substream, 819 struct snd_pcm_hw_params *params, 820 struct snd_soc_dai *dai) 821 { 822 struct snd_soc_codec *codec = dai->codec; 823 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 824 825 /* Check parameters for validity */ 826 switch (params_rate(params)) { 827 case 44100: 828 case 48000: 829 break; 830 default: 831 dev_err(codec->dev, "unsupported rate %d\n", 832 params_rate(params)); 833 return -EINVAL; 834 } 835 836 switch (params_width(params)) { 837 case 16: 838 dac33->fifo_size = DAC33_FIFO_SIZE_16BIT; 839 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 32); 840 break; 841 case 32: 842 dac33->fifo_size = DAC33_FIFO_SIZE_24BIT; 843 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 64); 844 break; 845 default: 846 dev_err(codec->dev, "unsupported width %d\n", 847 params_width(params)); 848 return -EINVAL; 849 } 850 851 return 0; 852 } 853 854 #define CALC_OSCSET(rate, refclk) ( \ 855 ((((rate * 10000) / refclk) * 4096) + 7000) / 10000) 856 #define CALC_RATIOSET(rate, refclk) ( \ 857 ((((refclk * 100000) / rate) * 16384) + 50000) / 100000) 858 859 /* 860 * tlv320dac33 is strict on the sequence of the register writes, if the register 861 * writes happens in different order, than dac33 might end up in unknown state. 862 * Use the known, working sequence of register writes to initialize the dac33. 863 */ 864 static int dac33_prepare_chip(struct snd_pcm_substream *substream, 865 struct snd_soc_codec *codec) 866 { 867 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 868 unsigned int oscset, ratioset, pwr_ctrl, reg_tmp; 869 u8 aictrl_a, aictrl_b, fifoctrl_a; 870 871 switch (substream->runtime->rate) { 872 case 44100: 873 case 48000: 874 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk); 875 ratioset = CALC_RATIOSET(substream->runtime->rate, 876 dac33->refclk); 877 break; 878 default: 879 dev_err(codec->dev, "unsupported rate %d\n", 880 substream->runtime->rate); 881 return -EINVAL; 882 } 883 884 885 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A); 886 aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK); 887 /* Read FIFO control A, and clear FIFO flush bit */ 888 fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A); 889 fifoctrl_a &= ~DAC33_FIFOFLUSH; 890 891 fifoctrl_a &= ~DAC33_WIDTH; 892 switch (substream->runtime->format) { 893 case SNDRV_PCM_FORMAT_S16_LE: 894 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16); 895 fifoctrl_a |= DAC33_WIDTH; 896 break; 897 case SNDRV_PCM_FORMAT_S32_LE: 898 aictrl_a |= (DAC33_NCYCL_32 | DAC33_WLEN_24); 899 break; 900 default: 901 dev_err(codec->dev, "unsupported format %d\n", 902 substream->runtime->format); 903 return -EINVAL; 904 } 905 906 mutex_lock(&dac33->mutex); 907 908 if (!dac33->chip_power) { 909 /* 910 * Chip is not powered yet. 911 * Do the init in the dac33_set_bias_level later. 912 */ 913 mutex_unlock(&dac33->mutex); 914 return 0; 915 } 916 917 dac33_soft_power(codec, 0); 918 dac33_soft_power(codec, 1); 919 920 reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL); 921 dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp); 922 923 /* Write registers 0x08 and 0x09 (MSB, LSB) */ 924 dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset); 925 926 /* OSC calibration time */ 927 dac33_write(codec, DAC33_CALIB_TIME, 96); 928 929 /* adjustment treshold & step */ 930 dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) | 931 DAC33_ADJSTEP(1)); 932 933 /* div=4 / gain=1 / div */ 934 dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4)); 935 936 pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL); 937 pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB; 938 dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl); 939 940 dac33_oscwait(codec); 941 942 if (dac33->fifo_mode) { 943 /* Generic for all FIFO modes */ 944 /* 50-51 : ASRC Control registers */ 945 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1)); 946 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */ 947 948 /* Write registers 0x34 and 0x35 (MSB, LSB) */ 949 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset); 950 951 /* Set interrupts to high active */ 952 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH); 953 } else { 954 /* FIFO bypass mode */ 955 /* 50-51 : ASRC Control registers */ 956 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP); 957 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */ 958 } 959 960 /* Interrupt behaviour configuration */ 961 switch (dac33->fifo_mode) { 962 case DAC33_FIFO_MODE1: 963 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B, 964 DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL)); 965 break; 966 case DAC33_FIFO_MODE7: 967 dac33_write(codec, DAC33_FIFO_IRQ_MODE_A, 968 DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL)); 969 break; 970 default: 971 /* in FIFO bypass mode, the interrupts are not used */ 972 break; 973 } 974 975 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B); 976 977 switch (dac33->fifo_mode) { 978 case DAC33_FIFO_MODE1: 979 /* 980 * For mode1: 981 * Disable the FIFO bypass (Enable the use of FIFO) 982 * Select nSample 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 case DAC33_FIFO_MODE7: 993 /* 994 * For mode1: 995 * Disable the FIFO bypass (Enable the use of FIFO) 996 * Select Threshold mode 997 * BCLK is only running when data is needed by DAC33 998 */ 999 fifoctrl_a &= ~DAC33_FBYPAS; 1000 fifoctrl_a |= DAC33_FAUTO; 1001 if (dac33->keep_bclk) 1002 aictrl_b |= DAC33_BCLKON; 1003 else 1004 aictrl_b &= ~DAC33_BCLKON; 1005 break; 1006 default: 1007 /* 1008 * For FIFO bypass mode: 1009 * Enable the FIFO bypass (Disable the FIFO use) 1010 * Set the BCLK as continuous 1011 */ 1012 fifoctrl_a |= DAC33_FBYPAS; 1013 aictrl_b |= DAC33_BCLKON; 1014 break; 1015 } 1016 1017 dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a); 1018 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a); 1019 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b); 1020 1021 /* 1022 * BCLK divide ratio 1023 * 0: 1.5 1024 * 1: 1 1025 * 2: 2 1026 * ... 1027 * 254: 254 1028 * 255: 255 1029 */ 1030 if (dac33->fifo_mode) 1031 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 1032 dac33->burst_bclkdiv); 1033 else 1034 if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE) 1035 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32); 1036 else 1037 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 16); 1038 1039 switch (dac33->fifo_mode) { 1040 case DAC33_FIFO_MODE1: 1041 dac33_write16(codec, DAC33_ATHR_MSB, 1042 DAC33_THRREG(dac33->alarm_threshold)); 1043 break; 1044 case DAC33_FIFO_MODE7: 1045 /* 1046 * Configure the threshold levels, and leave 10 sample space 1047 * at the bottom, and also at the top of the FIFO 1048 */ 1049 dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr)); 1050 dac33_write16(codec, DAC33_LTHR_MSB, 1051 DAC33_THRREG(DAC33_MODE7_MARGIN)); 1052 break; 1053 default: 1054 break; 1055 } 1056 1057 mutex_unlock(&dac33->mutex); 1058 1059 return 0; 1060 } 1061 1062 static void dac33_calculate_times(struct snd_pcm_substream *substream, 1063 struct snd_soc_codec *codec) 1064 { 1065 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 1066 unsigned int period_size = substream->runtime->period_size; 1067 unsigned int rate = substream->runtime->rate; 1068 unsigned int nsample_limit; 1069 1070 /* In bypass mode we don't need to calculate */ 1071 if (!dac33->fifo_mode) 1072 return; 1073 1074 switch (dac33->fifo_mode) { 1075 case DAC33_FIFO_MODE1: 1076 /* Number of samples under i2c latency */ 1077 dac33->alarm_threshold = US_TO_SAMPLES(rate, 1078 dac33->mode1_latency); 1079 nsample_limit = dac33->fifo_size - dac33->alarm_threshold; 1080 1081 if (period_size <= dac33->alarm_threshold) 1082 /* 1083 * Configure nSamaple to number of periods, 1084 * which covers the latency requironment. 1085 */ 1086 dac33->nsample = period_size * 1087 ((dac33->alarm_threshold / period_size) + 1088 (dac33->alarm_threshold % period_size ? 1089 1 : 0)); 1090 else if (period_size > nsample_limit) 1091 dac33->nsample = nsample_limit; 1092 else 1093 dac33->nsample = period_size; 1094 1095 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate, 1096 dac33->nsample); 1097 dac33->t_stamp1 = 0; 1098 dac33->t_stamp2 = 0; 1099 break; 1100 case DAC33_FIFO_MODE7: 1101 dac33->uthr = UTHR_FROM_PERIOD_SIZE(period_size, rate, 1102 dac33->burst_rate) + 9; 1103 if (dac33->uthr > (dac33->fifo_size - DAC33_MODE7_MARGIN)) 1104 dac33->uthr = dac33->fifo_size - DAC33_MODE7_MARGIN; 1105 if (dac33->uthr < (DAC33_MODE7_MARGIN + 10)) 1106 dac33->uthr = (DAC33_MODE7_MARGIN + 10); 1107 1108 dac33->mode7_us_to_lthr = 1109 SAMPLES_TO_US(substream->runtime->rate, 1110 dac33->uthr - DAC33_MODE7_MARGIN + 1); 1111 dac33->t_stamp1 = 0; 1112 break; 1113 default: 1114 break; 1115 } 1116 1117 } 1118 1119 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd, 1120 struct snd_soc_dai *dai) 1121 { 1122 struct snd_soc_codec *codec = dai->codec; 1123 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 1124 int ret = 0; 1125 1126 switch (cmd) { 1127 case SNDRV_PCM_TRIGGER_START: 1128 case SNDRV_PCM_TRIGGER_RESUME: 1129 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1130 if (dac33->fifo_mode) { 1131 dac33->state = DAC33_PREFILL; 1132 schedule_work(&dac33->work); 1133 } 1134 break; 1135 case SNDRV_PCM_TRIGGER_STOP: 1136 case SNDRV_PCM_TRIGGER_SUSPEND: 1137 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1138 if (dac33->fifo_mode) { 1139 dac33->state = DAC33_FLUSH; 1140 schedule_work(&dac33->work); 1141 } 1142 break; 1143 default: 1144 ret = -EINVAL; 1145 } 1146 1147 return ret; 1148 } 1149 1150 static snd_pcm_sframes_t dac33_dai_delay( 1151 struct snd_pcm_substream *substream, 1152 struct snd_soc_dai *dai) 1153 { 1154 struct snd_soc_codec *codec = dai->codec; 1155 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 1156 unsigned long long t0, t1, t_now; 1157 unsigned int time_delta, uthr; 1158 int samples_out, samples_in, samples; 1159 snd_pcm_sframes_t delay = 0; 1160 unsigned long flags; 1161 1162 switch (dac33->fifo_mode) { 1163 case DAC33_FIFO_BYPASS: 1164 break; 1165 case DAC33_FIFO_MODE1: 1166 spin_lock_irqsave(&dac33->lock, flags); 1167 t0 = dac33->t_stamp1; 1168 t1 = dac33->t_stamp2; 1169 spin_unlock_irqrestore(&dac33->lock, flags); 1170 t_now = ktime_to_us(ktime_get()); 1171 1172 /* We have not started to fill the FIFO yet, delay is 0 */ 1173 if (!t1) 1174 goto out; 1175 1176 if (t0 > t1) { 1177 /* 1178 * Phase 1: 1179 * After Alarm threshold, and before nSample write 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 if (likely(dac33->alarm_threshold > samples_out)) 1187 delay = dac33->alarm_threshold - samples_out; 1188 else 1189 delay = 0; 1190 } else if ((t_now - t1) <= dac33->mode1_us_burst) { 1191 /* 1192 * Phase 2: 1193 * After nSample write (during burst operation) 1194 */ 1195 time_delta = t_now - t0; 1196 samples_out = time_delta ? US_TO_SAMPLES( 1197 substream->runtime->rate, 1198 time_delta) : 0; 1199 1200 time_delta = t_now - t1; 1201 samples_in = time_delta ? US_TO_SAMPLES( 1202 dac33->burst_rate, 1203 time_delta) : 0; 1204 1205 samples = dac33->alarm_threshold; 1206 samples += (samples_in - samples_out); 1207 1208 if (likely(samples > 0)) 1209 delay = samples; 1210 else 1211 delay = 0; 1212 } else { 1213 /* 1214 * Phase 3: 1215 * After burst operation, before next alarm threshold 1216 */ 1217 time_delta = t_now - t0; 1218 samples_out = time_delta ? US_TO_SAMPLES( 1219 substream->runtime->rate, 1220 time_delta) : 0; 1221 1222 samples_in = dac33->nsample; 1223 samples = dac33->alarm_threshold; 1224 samples += (samples_in - samples_out); 1225 1226 if (likely(samples > 0)) 1227 delay = samples > dac33->fifo_size ? 1228 dac33->fifo_size : samples; 1229 else 1230 delay = 0; 1231 } 1232 break; 1233 case DAC33_FIFO_MODE7: 1234 spin_lock_irqsave(&dac33->lock, flags); 1235 t0 = dac33->t_stamp1; 1236 uthr = dac33->uthr; 1237 spin_unlock_irqrestore(&dac33->lock, flags); 1238 t_now = ktime_to_us(ktime_get()); 1239 1240 /* We have not started to fill the FIFO yet, delay is 0 */ 1241 if (!t0) 1242 goto out; 1243 1244 if (t_now <= t0) { 1245 /* 1246 * Either the timestamps are messed or equal. Report 1247 * maximum delay 1248 */ 1249 delay = uthr; 1250 goto out; 1251 } 1252 1253 time_delta = t_now - t0; 1254 if (time_delta <= dac33->mode7_us_to_lthr) { 1255 /* 1256 * Phase 1: 1257 * After burst (draining phase) 1258 */ 1259 samples_out = US_TO_SAMPLES( 1260 substream->runtime->rate, 1261 time_delta); 1262 1263 if (likely(uthr > samples_out)) 1264 delay = uthr - samples_out; 1265 else 1266 delay = 0; 1267 } else { 1268 /* 1269 * Phase 2: 1270 * During burst operation 1271 */ 1272 time_delta = time_delta - dac33->mode7_us_to_lthr; 1273 1274 samples_out = US_TO_SAMPLES( 1275 substream->runtime->rate, 1276 time_delta); 1277 samples_in = US_TO_SAMPLES( 1278 dac33->burst_rate, 1279 time_delta); 1280 delay = DAC33_MODE7_MARGIN + samples_in - samples_out; 1281 1282 if (unlikely(delay > uthr)) 1283 delay = uthr; 1284 } 1285 break; 1286 default: 1287 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n", 1288 dac33->fifo_mode); 1289 break; 1290 } 1291 out: 1292 return delay; 1293 } 1294 1295 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai, 1296 int clk_id, unsigned int freq, int dir) 1297 { 1298 struct snd_soc_codec *codec = codec_dai->codec; 1299 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 1300 u8 ioc_reg, asrcb_reg; 1301 1302 ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL); 1303 asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B); 1304 switch (clk_id) { 1305 case TLV320DAC33_MCLK: 1306 ioc_reg |= DAC33_REFSEL; 1307 asrcb_reg |= DAC33_SRCREFSEL; 1308 break; 1309 case TLV320DAC33_SLEEPCLK: 1310 ioc_reg &= ~DAC33_REFSEL; 1311 asrcb_reg &= ~DAC33_SRCREFSEL; 1312 break; 1313 default: 1314 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id); 1315 break; 1316 } 1317 dac33->refclk = freq; 1318 1319 dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg); 1320 dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg); 1321 1322 return 0; 1323 } 1324 1325 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai, 1326 unsigned int fmt) 1327 { 1328 struct snd_soc_codec *codec = codec_dai->codec; 1329 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 1330 u8 aictrl_a, aictrl_b; 1331 1332 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A); 1333 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B); 1334 /* set master/slave audio interface */ 1335 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 1336 case SND_SOC_DAIFMT_CBM_CFM: 1337 /* Codec Master */ 1338 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK); 1339 break; 1340 case SND_SOC_DAIFMT_CBS_CFS: 1341 /* Codec Slave */ 1342 if (dac33->fifo_mode) { 1343 dev_err(codec->dev, "FIFO mode requires master mode\n"); 1344 return -EINVAL; 1345 } else 1346 aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK); 1347 break; 1348 default: 1349 return -EINVAL; 1350 } 1351 1352 aictrl_a &= ~DAC33_AFMT_MASK; 1353 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 1354 case SND_SOC_DAIFMT_I2S: 1355 aictrl_a |= DAC33_AFMT_I2S; 1356 break; 1357 case SND_SOC_DAIFMT_DSP_A: 1358 aictrl_a |= DAC33_AFMT_DSP; 1359 aictrl_b &= ~DAC33_DATA_DELAY_MASK; 1360 aictrl_b |= DAC33_DATA_DELAY(0); 1361 break; 1362 case SND_SOC_DAIFMT_RIGHT_J: 1363 aictrl_a |= DAC33_AFMT_RIGHT_J; 1364 break; 1365 case SND_SOC_DAIFMT_LEFT_J: 1366 aictrl_a |= DAC33_AFMT_LEFT_J; 1367 break; 1368 default: 1369 dev_err(codec->dev, "Unsupported format (%u)\n", 1370 fmt & SND_SOC_DAIFMT_FORMAT_MASK); 1371 return -EINVAL; 1372 } 1373 1374 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a); 1375 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b); 1376 1377 return 0; 1378 } 1379 1380 static int dac33_soc_probe(struct snd_soc_codec *codec) 1381 { 1382 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 1383 int ret = 0; 1384 1385 dac33->codec = codec; 1386 1387 /* Read the tlv320dac33 ID registers */ 1388 ret = dac33_hard_power(codec, 1); 1389 if (ret != 0) { 1390 dev_err(codec->dev, "Failed to power up codec: %d\n", ret); 1391 goto err_power; 1392 } 1393 ret = dac33_read_id(codec); 1394 dac33_hard_power(codec, 0); 1395 1396 if (ret < 0) { 1397 dev_err(codec->dev, "Failed to read chip ID: %d\n", ret); 1398 ret = -ENODEV; 1399 goto err_power; 1400 } 1401 1402 /* Check if the IRQ number is valid and request it */ 1403 if (dac33->irq >= 0) { 1404 ret = request_irq(dac33->irq, dac33_interrupt_handler, 1405 IRQF_TRIGGER_RISING, 1406 codec->component.name, codec); 1407 if (ret < 0) { 1408 dev_err(codec->dev, "Could not request IRQ%d (%d)\n", 1409 dac33->irq, ret); 1410 dac33->irq = -1; 1411 } 1412 if (dac33->irq != -1) { 1413 INIT_WORK(&dac33->work, dac33_work); 1414 } 1415 } 1416 1417 /* Only add the FIFO controls, if we have valid IRQ number */ 1418 if (dac33->irq >= 0) 1419 snd_soc_add_codec_controls(codec, dac33_mode_snd_controls, 1420 ARRAY_SIZE(dac33_mode_snd_controls)); 1421 1422 err_power: 1423 return ret; 1424 } 1425 1426 static int dac33_soc_remove(struct snd_soc_codec *codec) 1427 { 1428 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec); 1429 1430 if (dac33->irq >= 0) { 1431 free_irq(dac33->irq, dac33->codec); 1432 flush_work(&dac33->work); 1433 } 1434 return 0; 1435 } 1436 1437 static const struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = { 1438 .read = dac33_read_reg_cache, 1439 .write = dac33_write_locked, 1440 .set_bias_level = dac33_set_bias_level, 1441 .idle_bias_off = true, 1442 1443 .probe = dac33_soc_probe, 1444 .remove = dac33_soc_remove, 1445 1446 .component_driver = { 1447 .controls = dac33_snd_controls, 1448 .num_controls = ARRAY_SIZE(dac33_snd_controls), 1449 .dapm_widgets = dac33_dapm_widgets, 1450 .num_dapm_widgets = ARRAY_SIZE(dac33_dapm_widgets), 1451 .dapm_routes = audio_map, 1452 .num_dapm_routes = ARRAY_SIZE(audio_map), 1453 }, 1454 }; 1455 1456 #define DAC33_RATES (SNDRV_PCM_RATE_44100 | \ 1457 SNDRV_PCM_RATE_48000) 1458 #define DAC33_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE) 1459 1460 static const struct snd_soc_dai_ops dac33_dai_ops = { 1461 .startup = dac33_startup, 1462 .shutdown = dac33_shutdown, 1463 .hw_params = dac33_hw_params, 1464 .trigger = dac33_pcm_trigger, 1465 .delay = dac33_dai_delay, 1466 .set_sysclk = dac33_set_dai_sysclk, 1467 .set_fmt = dac33_set_dai_fmt, 1468 }; 1469 1470 static struct snd_soc_dai_driver dac33_dai = { 1471 .name = "tlv320dac33-hifi", 1472 .playback = { 1473 .stream_name = "Playback", 1474 .channels_min = 2, 1475 .channels_max = 2, 1476 .rates = DAC33_RATES, 1477 .formats = DAC33_FORMATS, 1478 .sig_bits = 24, 1479 }, 1480 .ops = &dac33_dai_ops, 1481 }; 1482 1483 static int dac33_i2c_probe(struct i2c_client *client, 1484 const struct i2c_device_id *id) 1485 { 1486 struct tlv320dac33_platform_data *pdata; 1487 struct tlv320dac33_priv *dac33; 1488 int ret, i; 1489 1490 if (client->dev.platform_data == NULL) { 1491 dev_err(&client->dev, "Platform data not set\n"); 1492 return -ENODEV; 1493 } 1494 pdata = client->dev.platform_data; 1495 1496 dac33 = devm_kzalloc(&client->dev, sizeof(struct tlv320dac33_priv), 1497 GFP_KERNEL); 1498 if (dac33 == NULL) 1499 return -ENOMEM; 1500 1501 dac33->reg_cache = devm_kmemdup(&client->dev, 1502 dac33_reg, 1503 ARRAY_SIZE(dac33_reg) * sizeof(u8), 1504 GFP_KERNEL); 1505 if (!dac33->reg_cache) 1506 return -ENOMEM; 1507 1508 dac33->i2c = client; 1509 mutex_init(&dac33->mutex); 1510 spin_lock_init(&dac33->lock); 1511 1512 i2c_set_clientdata(client, dac33); 1513 1514 dac33->power_gpio = pdata->power_gpio; 1515 dac33->burst_bclkdiv = pdata->burst_bclkdiv; 1516 dac33->keep_bclk = pdata->keep_bclk; 1517 dac33->mode1_latency = pdata->mode1_latency; 1518 if (!dac33->mode1_latency) 1519 dac33->mode1_latency = 10000; /* 10ms */ 1520 dac33->irq = client->irq; 1521 /* Disable FIFO use by default */ 1522 dac33->fifo_mode = DAC33_FIFO_BYPASS; 1523 1524 /* Check if the reset GPIO number is valid and request it */ 1525 if (dac33->power_gpio >= 0) { 1526 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset"); 1527 if (ret < 0) { 1528 dev_err(&client->dev, 1529 "Failed to request reset GPIO (%d)\n", 1530 dac33->power_gpio); 1531 goto err_gpio; 1532 } 1533 gpio_direction_output(dac33->power_gpio, 0); 1534 } 1535 1536 for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++) 1537 dac33->supplies[i].supply = dac33_supply_names[i]; 1538 1539 ret = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies), 1540 dac33->supplies); 1541 1542 if (ret != 0) { 1543 dev_err(&client->dev, "Failed to request supplies: %d\n", ret); 1544 goto err_get; 1545 } 1546 1547 ret = snd_soc_register_codec(&client->dev, 1548 &soc_codec_dev_tlv320dac33, &dac33_dai, 1); 1549 if (ret < 0) 1550 goto err_get; 1551 1552 return ret; 1553 err_get: 1554 if (dac33->power_gpio >= 0) 1555 gpio_free(dac33->power_gpio); 1556 err_gpio: 1557 return ret; 1558 } 1559 1560 static int dac33_i2c_remove(struct i2c_client *client) 1561 { 1562 struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client); 1563 1564 if (unlikely(dac33->chip_power)) 1565 dac33_hard_power(dac33->codec, 0); 1566 1567 if (dac33->power_gpio >= 0) 1568 gpio_free(dac33->power_gpio); 1569 1570 snd_soc_unregister_codec(&client->dev); 1571 return 0; 1572 } 1573 1574 static const struct i2c_device_id tlv320dac33_i2c_id[] = { 1575 { 1576 .name = "tlv320dac33", 1577 .driver_data = 0, 1578 }, 1579 { }, 1580 }; 1581 MODULE_DEVICE_TABLE(i2c, tlv320dac33_i2c_id); 1582 1583 static struct i2c_driver tlv320dac33_i2c_driver = { 1584 .driver = { 1585 .name = "tlv320dac33-codec", 1586 }, 1587 .probe = dac33_i2c_probe, 1588 .remove = dac33_i2c_remove, 1589 .id_table = tlv320dac33_i2c_id, 1590 }; 1591 1592 module_i2c_driver(tlv320dac33_i2c_driver); 1593 1594 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver"); 1595 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>"); 1596 MODULE_LICENSE("GPL"); 1597