1 /* 2 * Copyright (C) STMicroelectronics SA 2015 3 * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com> 4 * for STMicroelectronics. 5 * License terms: GNU General Public License (GPL), version 2 6 */ 7 8 #include <linux/clk.h> 9 #include <linux/mfd/syscon.h> 10 11 #include <sound/asoundef.h> 12 #include <sound/soc.h> 13 14 #include "uniperif.h" 15 16 /* 17 * Some hardware-related definitions 18 */ 19 20 /* sys config registers definitions */ 21 #define SYS_CFG_AUDIO_GLUE 0xA4 22 23 /* 24 * Driver specific types. 25 */ 26 27 #define UNIPERIF_PLAYER_CLK_ADJ_MIN -999999 28 #define UNIPERIF_PLAYER_CLK_ADJ_MAX 1000000 29 #define UNIPERIF_PLAYER_I2S_OUT 1 /* player id connected to I2S/TDM TX bus */ 30 31 /* 32 * Note: snd_pcm_hardware is linked to DMA controller but is declared here to 33 * integrate DAI_CPU capability in term of rate and supported channels 34 */ 35 static const struct snd_pcm_hardware uni_player_pcm_hw = { 36 .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | 37 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP | 38 SNDRV_PCM_INFO_MMAP_VALID, 39 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE, 40 41 .rates = SNDRV_PCM_RATE_CONTINUOUS, 42 .rate_min = 8000, 43 .rate_max = 192000, 44 45 .channels_min = 2, 46 .channels_max = 8, 47 48 .periods_min = 2, 49 .periods_max = 48, 50 51 .period_bytes_min = 128, 52 .period_bytes_max = 64 * PAGE_SIZE, 53 .buffer_bytes_max = 256 * PAGE_SIZE 54 }; 55 56 /* 57 * uni_player_irq_handler 58 * In case of error audio stream is stopped; stop action is protected via PCM 59 * stream lock to avoid race condition with trigger callback. 60 */ 61 static irqreturn_t uni_player_irq_handler(int irq, void *dev_id) 62 { 63 irqreturn_t ret = IRQ_NONE; 64 struct uniperif *player = dev_id; 65 unsigned int status; 66 unsigned int tmp; 67 68 spin_lock(&player->irq_lock); 69 if (!player->substream) 70 goto irq_spin_unlock; 71 72 snd_pcm_stream_lock(player->substream); 73 if (player->state == UNIPERIF_STATE_STOPPED) 74 goto stream_unlock; 75 76 /* Get interrupt status & clear them immediately */ 77 status = GET_UNIPERIF_ITS(player); 78 SET_UNIPERIF_ITS_BCLR(player, status); 79 80 /* Check for fifo error (underrun) */ 81 if (unlikely(status & UNIPERIF_ITS_FIFO_ERROR_MASK(player))) { 82 dev_err(player->dev, "FIFO underflow error detected\n"); 83 84 /* Interrupt is just for information when underflow recovery */ 85 if (player->underflow_enabled) { 86 /* Update state to underflow */ 87 player->state = UNIPERIF_STATE_UNDERFLOW; 88 89 } else { 90 /* Disable interrupt so doesn't continually fire */ 91 SET_UNIPERIF_ITM_BCLR_FIFO_ERROR(player); 92 93 /* Stop the player */ 94 snd_pcm_stop_xrun(player->substream); 95 } 96 97 ret = IRQ_HANDLED; 98 } 99 100 /* Check for dma error (overrun) */ 101 if (unlikely(status & UNIPERIF_ITS_DMA_ERROR_MASK(player))) { 102 dev_err(player->dev, "DMA error detected\n"); 103 104 /* Disable interrupt so doesn't continually fire */ 105 SET_UNIPERIF_ITM_BCLR_DMA_ERROR(player); 106 107 /* Stop the player */ 108 snd_pcm_stop_xrun(player->substream); 109 110 ret = IRQ_HANDLED; 111 } 112 113 /* Check for underflow recovery done */ 114 if (unlikely(status & UNIPERIF_ITM_UNDERFLOW_REC_DONE_MASK(player))) { 115 if (!player->underflow_enabled) { 116 dev_err(player->dev, 117 "unexpected Underflow recovering\n"); 118 ret = -EPERM; 119 goto stream_unlock; 120 } 121 /* Read the underflow recovery duration */ 122 tmp = GET_UNIPERIF_STATUS_1_UNDERFLOW_DURATION(player); 123 dev_dbg(player->dev, "Underflow recovered (%d LR clocks max)\n", 124 tmp); 125 126 /* Clear the underflow recovery duration */ 127 SET_UNIPERIF_BIT_CONTROL_CLR_UNDERFLOW_DURATION(player); 128 129 /* Update state to started */ 130 player->state = UNIPERIF_STATE_STARTED; 131 132 ret = IRQ_HANDLED; 133 } 134 135 /* Check if underflow recovery failed */ 136 if (unlikely(status & 137 UNIPERIF_ITM_UNDERFLOW_REC_FAILED_MASK(player))) { 138 dev_err(player->dev, "Underflow recovery failed\n"); 139 140 /* Stop the player */ 141 snd_pcm_stop_xrun(player->substream); 142 143 ret = IRQ_HANDLED; 144 } 145 146 stream_unlock: 147 snd_pcm_stream_unlock(player->substream); 148 irq_spin_unlock: 149 spin_unlock(&player->irq_lock); 150 151 return ret; 152 } 153 154 static int uni_player_clk_set_rate(struct uniperif *player, unsigned long rate) 155 { 156 int rate_adjusted, rate_achieved, delta, ret; 157 int adjustment = player->clk_adj; 158 159 /* 160 * a 161 * F = f + --------- * f = f + d 162 * 1000000 163 * 164 * a 165 * d = --------- * f 166 * 1000000 167 * 168 * where: 169 * f - nominal rate 170 * a - adjustment in ppm (parts per milion) 171 * F - rate to be set in synthesizer 172 * d - delta (difference) between f and F 173 */ 174 if (adjustment < 0) { 175 /* div64_64 operates on unsigned values... */ 176 delta = -1; 177 adjustment = -adjustment; 178 } else { 179 delta = 1; 180 } 181 /* 500000 ppm is 0.5, which is used to round up values */ 182 delta *= (int)div64_u64((uint64_t)rate * 183 (uint64_t)adjustment + 500000, 1000000); 184 rate_adjusted = rate + delta; 185 186 /* Adjusted rate should never be == 0 */ 187 if (!rate_adjusted) 188 return -EINVAL; 189 190 ret = clk_set_rate(player->clk, rate_adjusted); 191 if (ret < 0) 192 return ret; 193 194 rate_achieved = clk_get_rate(player->clk); 195 if (!rate_achieved) 196 /* If value is 0 means that clock or parent not valid */ 197 return -EINVAL; 198 199 /* 200 * Using ALSA's adjustment control, we can modify the rate to be up 201 * to twice as much as requested, but no more 202 */ 203 delta = rate_achieved - rate; 204 if (delta < 0) { 205 /* div64_64 operates on unsigned values... */ 206 delta = -delta; 207 adjustment = -1; 208 } else { 209 adjustment = 1; 210 } 211 /* Frequency/2 is added to round up result */ 212 adjustment *= (int)div64_u64((uint64_t)delta * 1000000 + rate / 2, 213 rate); 214 player->clk_adj = adjustment; 215 return 0; 216 } 217 218 static void uni_player_set_channel_status(struct uniperif *player, 219 struct snd_pcm_runtime *runtime) 220 { 221 int n; 222 unsigned int status; 223 224 /* 225 * Some AVRs and TVs require the channel status to contain a correct 226 * sampling frequency. If no sample rate is already specified, then 227 * set one. 228 */ 229 mutex_lock(&player->ctrl_lock); 230 if (runtime) { 231 switch (runtime->rate) { 232 case 22050: 233 player->stream_settings.iec958.status[3] = 234 IEC958_AES3_CON_FS_22050; 235 break; 236 case 44100: 237 player->stream_settings.iec958.status[3] = 238 IEC958_AES3_CON_FS_44100; 239 break; 240 case 88200: 241 player->stream_settings.iec958.status[3] = 242 IEC958_AES3_CON_FS_88200; 243 break; 244 case 176400: 245 player->stream_settings.iec958.status[3] = 246 IEC958_AES3_CON_FS_176400; 247 break; 248 case 24000: 249 player->stream_settings.iec958.status[3] = 250 IEC958_AES3_CON_FS_24000; 251 break; 252 case 48000: 253 player->stream_settings.iec958.status[3] = 254 IEC958_AES3_CON_FS_48000; 255 break; 256 case 96000: 257 player->stream_settings.iec958.status[3] = 258 IEC958_AES3_CON_FS_96000; 259 break; 260 case 192000: 261 player->stream_settings.iec958.status[3] = 262 IEC958_AES3_CON_FS_192000; 263 break; 264 case 32000: 265 player->stream_settings.iec958.status[3] = 266 IEC958_AES3_CON_FS_32000; 267 break; 268 default: 269 /* Mark as sampling frequency not indicated */ 270 player->stream_settings.iec958.status[3] = 271 IEC958_AES3_CON_FS_NOTID; 272 break; 273 } 274 } 275 276 /* Audio mode: 277 * Use audio mode status to select PCM or encoded mode 278 */ 279 if (player->stream_settings.iec958.status[0] & IEC958_AES0_NONAUDIO) 280 player->stream_settings.encoding_mode = 281 UNIPERIF_IEC958_ENCODING_MODE_ENCODED; 282 else 283 player->stream_settings.encoding_mode = 284 UNIPERIF_IEC958_ENCODING_MODE_PCM; 285 286 if (player->stream_settings.encoding_mode == 287 UNIPERIF_IEC958_ENCODING_MODE_PCM) 288 /* Clear user validity bits */ 289 SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0); 290 else 291 /* Set user validity bits */ 292 SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 1); 293 294 /* Program the new channel status */ 295 for (n = 0; n < 6; ++n) { 296 status = 297 player->stream_settings.iec958.status[0 + (n * 4)] & 0xf; 298 status |= 299 player->stream_settings.iec958.status[1 + (n * 4)] << 8; 300 status |= 301 player->stream_settings.iec958.status[2 + (n * 4)] << 16; 302 status |= 303 player->stream_settings.iec958.status[3 + (n * 4)] << 24; 304 SET_UNIPERIF_CHANNEL_STA_REGN(player, n, status); 305 } 306 mutex_unlock(&player->ctrl_lock); 307 308 /* Update the channel status */ 309 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) 310 SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player); 311 else 312 SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player); 313 } 314 315 static int uni_player_prepare_iec958(struct uniperif *player, 316 struct snd_pcm_runtime *runtime) 317 { 318 int clk_div; 319 320 clk_div = player->mclk / runtime->rate; 321 322 /* Oversampling must be multiple of 128 as iec958 frame is 32-bits */ 323 if ((clk_div % 128) || (clk_div <= 0)) { 324 dev_err(player->dev, "%s: invalid clk_div %d\n", 325 __func__, clk_div); 326 return -EINVAL; 327 } 328 329 switch (runtime->format) { 330 case SNDRV_PCM_FORMAT_S16_LE: 331 /* 16/16 memory format */ 332 SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player); 333 /* 16-bits per sub-frame */ 334 SET_UNIPERIF_I2S_FMT_NBIT_32(player); 335 /* Set 16-bit sample precision */ 336 SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player); 337 break; 338 case SNDRV_PCM_FORMAT_S32_LE: 339 /* 16/0 memory format */ 340 SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player); 341 /* 32-bits per sub-frame */ 342 SET_UNIPERIF_I2S_FMT_NBIT_32(player); 343 /* Set 24-bit sample precision */ 344 SET_UNIPERIF_I2S_FMT_DATA_SIZE_24(player); 345 break; 346 default: 347 dev_err(player->dev, "format not supported\n"); 348 return -EINVAL; 349 } 350 351 /* Set parity to be calculated by the hardware */ 352 SET_UNIPERIF_CONFIG_PARITY_CNTR_BY_HW(player); 353 354 /* Set channel status bits to be inserted by the hardware */ 355 SET_UNIPERIF_CONFIG_CHANNEL_STA_CNTR_BY_HW(player); 356 357 /* Set user data bits to be inserted by the hardware */ 358 SET_UNIPERIF_CONFIG_USER_DAT_CNTR_BY_HW(player); 359 360 /* Set validity bits to be inserted by the hardware */ 361 SET_UNIPERIF_CONFIG_VALIDITY_DAT_CNTR_BY_HW(player); 362 363 /* Set full software control to disabled */ 364 SET_UNIPERIF_CONFIG_SPDIF_SW_CTRL_DISABLE(player); 365 366 SET_UNIPERIF_CTRL_ZERO_STUFF_HW(player); 367 368 /* Update the channel status */ 369 uni_player_set_channel_status(player, runtime); 370 371 /* Clear the user validity user bits */ 372 SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0); 373 374 /* Disable one-bit audio mode */ 375 SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player); 376 377 /* Enable consecutive frames repetition of Z preamble (not for HBRA) */ 378 SET_UNIPERIF_CONFIG_REPEAT_CHL_STS_ENABLE(player); 379 380 /* Change to SUF0_SUBF1 and left/right channels swap! */ 381 SET_UNIPERIF_CONFIG_SUBFRAME_SEL_SUBF1_SUBF0(player); 382 383 /* Set data output as MSB first */ 384 SET_UNIPERIF_I2S_FMT_ORDER_MSB(player); 385 386 if (player->stream_settings.encoding_mode == 387 UNIPERIF_IEC958_ENCODING_MODE_ENCODED) 388 SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_ON(player); 389 else 390 SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_OFF(player); 391 392 SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2); 393 394 /* Set rounding to off */ 395 SET_UNIPERIF_CTRL_ROUNDING_OFF(player); 396 397 /* Set clock divisor */ 398 SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / 128); 399 400 /* Set the spdif latency to not wait before starting player */ 401 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player); 402 403 /* 404 * Ensure iec958 formatting is off. It will be enabled in function 405 * uni_player_start() at the same time as the operation 406 * mode is set to work around a silicon issue. 407 */ 408 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) 409 SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player); 410 else 411 SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player); 412 413 return 0; 414 } 415 416 static int uni_player_prepare_pcm(struct uniperif *player, 417 struct snd_pcm_runtime *runtime) 418 { 419 int output_frame_size, slot_width, clk_div; 420 421 /* Force slot width to 32 in I2S mode (HW constraint) */ 422 if ((player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) == 423 SND_SOC_DAIFMT_I2S) 424 slot_width = 32; 425 else 426 slot_width = snd_pcm_format_width(runtime->format); 427 428 output_frame_size = slot_width * runtime->channels; 429 430 clk_div = player->mclk / runtime->rate; 431 /* 432 * For 32 bits subframe clk_div must be a multiple of 128, 433 * for 16 bits must be a multiple of 64 434 */ 435 if ((slot_width == 32) && (clk_div % 128)) { 436 dev_err(player->dev, "%s: invalid clk_div\n", __func__); 437 return -EINVAL; 438 } 439 440 if ((slot_width == 16) && (clk_div % 64)) { 441 dev_err(player->dev, "%s: invalid clk_div\n", __func__); 442 return -EINVAL; 443 } 444 445 /* 446 * Number of bits per subframe (which is one channel sample) 447 * on output - Transfer 16 or 32 bits from FIFO 448 */ 449 switch (slot_width) { 450 case 32: 451 SET_UNIPERIF_I2S_FMT_NBIT_32(player); 452 SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player); 453 break; 454 case 16: 455 SET_UNIPERIF_I2S_FMT_NBIT_16(player); 456 SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player); 457 break; 458 default: 459 dev_err(player->dev, "subframe format not supported\n"); 460 return -EINVAL; 461 } 462 463 /* Configure data memory format */ 464 switch (runtime->format) { 465 case SNDRV_PCM_FORMAT_S16_LE: 466 /* One data word contains two samples */ 467 SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player); 468 break; 469 470 case SNDRV_PCM_FORMAT_S32_LE: 471 /* 472 * Actually "16 bits/0 bits" means "32/28/24/20/18/16 bits 473 * on the left than zeros (if less than 32 bytes)"... ;-) 474 */ 475 SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player); 476 break; 477 478 default: 479 dev_err(player->dev, "format not supported\n"); 480 return -EINVAL; 481 } 482 483 /* Set rounding to off */ 484 SET_UNIPERIF_CTRL_ROUNDING_OFF(player); 485 486 /* Set clock divisor */ 487 SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / (2 * output_frame_size)); 488 489 /* Number of channelsmust be even*/ 490 if ((runtime->channels % 2) || (runtime->channels < 2) || 491 (runtime->channels > 10)) { 492 dev_err(player->dev, "%s: invalid nb of channels\n", __func__); 493 return -EINVAL; 494 } 495 496 SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2); 497 498 /* Set 1-bit audio format to disabled */ 499 SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player); 500 501 SET_UNIPERIF_I2S_FMT_ORDER_MSB(player); 502 503 /* No iec958 formatting as outputting to DAC */ 504 SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player); 505 506 return 0; 507 } 508 509 static int uni_player_prepare_tdm(struct uniperif *player, 510 struct snd_pcm_runtime *runtime) 511 { 512 int tdm_frame_size; /* unip tdm frame size in bytes */ 513 int user_frame_size; /* user tdm frame size in bytes */ 514 /* default unip TDM_WORD_POS_X_Y */ 515 unsigned int word_pos[4] = { 516 0x04060002, 0x0C0E080A, 0x14161012, 0x1C1E181A}; 517 int freq, ret; 518 519 tdm_frame_size = 520 sti_uniperiph_get_unip_tdm_frame_size(player); 521 user_frame_size = 522 sti_uniperiph_get_user_frame_size(runtime); 523 524 /* fix 16/0 format */ 525 SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player); 526 SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player); 527 528 /* number of words inserted on the TDM line */ 529 SET_UNIPERIF_I2S_FMT_NUM_CH(player, user_frame_size / 4 / 2); 530 531 SET_UNIPERIF_I2S_FMT_ORDER_MSB(player); 532 SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player); 533 534 /* Enable the tdm functionality */ 535 SET_UNIPERIF_TDM_ENABLE_TDM_ENABLE(player); 536 537 /* number of 8 bits timeslots avail in unip tdm frame */ 538 SET_UNIPERIF_TDM_FS_REF_DIV_NUM_TIMESLOT(player, tdm_frame_size); 539 540 /* set the timeslot allocation for words in FIFO */ 541 sti_uniperiph_get_tdm_word_pos(player, word_pos); 542 SET_UNIPERIF_TDM_WORD_POS(player, 1_2, word_pos[WORD_1_2]); 543 SET_UNIPERIF_TDM_WORD_POS(player, 3_4, word_pos[WORD_3_4]); 544 SET_UNIPERIF_TDM_WORD_POS(player, 5_6, word_pos[WORD_5_6]); 545 SET_UNIPERIF_TDM_WORD_POS(player, 7_8, word_pos[WORD_7_8]); 546 547 /* set unip clk rate (not done vai set_sysclk ops) */ 548 freq = runtime->rate * tdm_frame_size * 8; 549 mutex_lock(&player->ctrl_lock); 550 ret = uni_player_clk_set_rate(player, freq); 551 if (!ret) 552 player->mclk = freq; 553 mutex_unlock(&player->ctrl_lock); 554 555 return 0; 556 } 557 558 /* 559 * ALSA uniperipheral iec958 controls 560 */ 561 static int uni_player_ctl_iec958_info(struct snd_kcontrol *kcontrol, 562 struct snd_ctl_elem_info *uinfo) 563 { 564 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 565 uinfo->count = 1; 566 567 return 0; 568 } 569 570 static int uni_player_ctl_iec958_get(struct snd_kcontrol *kcontrol, 571 struct snd_ctl_elem_value *ucontrol) 572 { 573 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 574 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 575 struct uniperif *player = priv->dai_data.uni; 576 struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958; 577 578 mutex_lock(&player->ctrl_lock); 579 ucontrol->value.iec958.status[0] = iec958->status[0]; 580 ucontrol->value.iec958.status[1] = iec958->status[1]; 581 ucontrol->value.iec958.status[2] = iec958->status[2]; 582 ucontrol->value.iec958.status[3] = iec958->status[3]; 583 mutex_unlock(&player->ctrl_lock); 584 return 0; 585 } 586 587 static int uni_player_ctl_iec958_put(struct snd_kcontrol *kcontrol, 588 struct snd_ctl_elem_value *ucontrol) 589 { 590 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 591 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 592 struct uniperif *player = priv->dai_data.uni; 593 struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958; 594 unsigned long flags; 595 596 mutex_lock(&player->ctrl_lock); 597 iec958->status[0] = ucontrol->value.iec958.status[0]; 598 iec958->status[1] = ucontrol->value.iec958.status[1]; 599 iec958->status[2] = ucontrol->value.iec958.status[2]; 600 iec958->status[3] = ucontrol->value.iec958.status[3]; 601 mutex_unlock(&player->ctrl_lock); 602 603 spin_lock_irqsave(&player->irq_lock, flags); 604 if (player->substream && player->substream->runtime) 605 uni_player_set_channel_status(player, 606 player->substream->runtime); 607 else 608 uni_player_set_channel_status(player, NULL); 609 610 spin_unlock_irqrestore(&player->irq_lock, flags); 611 return 0; 612 } 613 614 static struct snd_kcontrol_new uni_player_iec958_ctl = { 615 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 616 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT), 617 .info = uni_player_ctl_iec958_info, 618 .get = uni_player_ctl_iec958_get, 619 .put = uni_player_ctl_iec958_put, 620 }; 621 622 /* 623 * uniperif rate adjustement control 624 */ 625 static int snd_sti_clk_adjustment_info(struct snd_kcontrol *kcontrol, 626 struct snd_ctl_elem_info *uinfo) 627 { 628 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 629 uinfo->count = 1; 630 uinfo->value.integer.min = UNIPERIF_PLAYER_CLK_ADJ_MIN; 631 uinfo->value.integer.max = UNIPERIF_PLAYER_CLK_ADJ_MAX; 632 uinfo->value.integer.step = 1; 633 634 return 0; 635 } 636 637 static int snd_sti_clk_adjustment_get(struct snd_kcontrol *kcontrol, 638 struct snd_ctl_elem_value *ucontrol) 639 { 640 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 641 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 642 struct uniperif *player = priv->dai_data.uni; 643 644 mutex_lock(&player->ctrl_lock); 645 ucontrol->value.integer.value[0] = player->clk_adj; 646 mutex_unlock(&player->ctrl_lock); 647 648 return 0; 649 } 650 651 static int snd_sti_clk_adjustment_put(struct snd_kcontrol *kcontrol, 652 struct snd_ctl_elem_value *ucontrol) 653 { 654 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 655 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 656 struct uniperif *player = priv->dai_data.uni; 657 int ret = 0; 658 659 if ((ucontrol->value.integer.value[0] < UNIPERIF_PLAYER_CLK_ADJ_MIN) || 660 (ucontrol->value.integer.value[0] > UNIPERIF_PLAYER_CLK_ADJ_MAX)) 661 return -EINVAL; 662 663 mutex_lock(&player->ctrl_lock); 664 player->clk_adj = ucontrol->value.integer.value[0]; 665 666 if (player->mclk) 667 ret = uni_player_clk_set_rate(player, player->mclk); 668 mutex_unlock(&player->ctrl_lock); 669 670 return ret; 671 } 672 673 static struct snd_kcontrol_new uni_player_clk_adj_ctl = { 674 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 675 .name = "PCM Playback Oversampling Freq. Adjustment", 676 .info = snd_sti_clk_adjustment_info, 677 .get = snd_sti_clk_adjustment_get, 678 .put = snd_sti_clk_adjustment_put, 679 }; 680 681 static struct snd_kcontrol_new *snd_sti_pcm_ctl[] = { 682 &uni_player_clk_adj_ctl, 683 }; 684 685 static struct snd_kcontrol_new *snd_sti_iec_ctl[] = { 686 &uni_player_iec958_ctl, 687 &uni_player_clk_adj_ctl, 688 }; 689 690 static int uni_player_startup(struct snd_pcm_substream *substream, 691 struct snd_soc_dai *dai) 692 { 693 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 694 struct uniperif *player = priv->dai_data.uni; 695 unsigned long flags; 696 int ret; 697 698 spin_lock_irqsave(&player->irq_lock, flags); 699 player->substream = substream; 700 spin_unlock_irqrestore(&player->irq_lock, flags); 701 702 player->clk_adj = 0; 703 704 if (!UNIPERIF_TYPE_IS_TDM(player)) 705 return 0; 706 707 /* refine hw constraint in tdm mode */ 708 ret = snd_pcm_hw_rule_add(substream->runtime, 0, 709 SNDRV_PCM_HW_PARAM_CHANNELS, 710 sti_uniperiph_fix_tdm_chan, 711 player, SNDRV_PCM_HW_PARAM_CHANNELS, 712 -1); 713 if (ret < 0) 714 return ret; 715 716 return snd_pcm_hw_rule_add(substream->runtime, 0, 717 SNDRV_PCM_HW_PARAM_FORMAT, 718 sti_uniperiph_fix_tdm_format, 719 player, SNDRV_PCM_HW_PARAM_FORMAT, 720 -1); 721 } 722 723 static int uni_player_set_sysclk(struct snd_soc_dai *dai, int clk_id, 724 unsigned int freq, int dir) 725 { 726 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 727 struct uniperif *player = priv->dai_data.uni; 728 int ret; 729 730 if (UNIPERIF_TYPE_IS_TDM(player) || (dir == SND_SOC_CLOCK_IN)) 731 return 0; 732 733 if (clk_id != 0) 734 return -EINVAL; 735 736 mutex_lock(&player->ctrl_lock); 737 ret = uni_player_clk_set_rate(player, freq); 738 if (!ret) 739 player->mclk = freq; 740 mutex_unlock(&player->ctrl_lock); 741 742 return ret; 743 } 744 745 static int uni_player_prepare(struct snd_pcm_substream *substream, 746 struct snd_soc_dai *dai) 747 { 748 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 749 struct uniperif *player = priv->dai_data.uni; 750 struct snd_pcm_runtime *runtime = substream->runtime; 751 int transfer_size, trigger_limit; 752 int ret; 753 754 /* The player should be stopped */ 755 if (player->state != UNIPERIF_STATE_STOPPED) { 756 dev_err(player->dev, "%s: invalid player state %d\n", __func__, 757 player->state); 758 return -EINVAL; 759 } 760 761 /* Calculate transfer size (in fifo cells and bytes) for frame count */ 762 if (player->type == SND_ST_UNIPERIF_TYPE_TDM) { 763 /* transfer size = user frame size (in 32 bits FIFO cell) */ 764 transfer_size = 765 sti_uniperiph_get_user_frame_size(runtime) / 4; 766 } else { 767 transfer_size = runtime->channels * UNIPERIF_FIFO_FRAMES; 768 } 769 770 /* Calculate number of empty cells available before asserting DREQ */ 771 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) { 772 trigger_limit = UNIPERIF_FIFO_SIZE - transfer_size; 773 } else { 774 /* 775 * Since SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0 776 * FDMA_TRIGGER_LIMIT also controls when the state switches 777 * from OFF or STANDBY to AUDIO DATA. 778 */ 779 trigger_limit = transfer_size; 780 } 781 782 /* Trigger limit must be an even number */ 783 if ((!trigger_limit % 2) || (trigger_limit != 1 && transfer_size % 2) || 784 (trigger_limit > UNIPERIF_CONFIG_DMA_TRIG_LIMIT_MASK(player))) { 785 dev_err(player->dev, "invalid trigger limit %d\n", 786 trigger_limit); 787 return -EINVAL; 788 } 789 790 SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(player, trigger_limit); 791 792 /* Uniperipheral setup depends on player type */ 793 switch (player->type) { 794 case SND_ST_UNIPERIF_TYPE_HDMI: 795 ret = uni_player_prepare_iec958(player, runtime); 796 break; 797 case SND_ST_UNIPERIF_TYPE_PCM: 798 ret = uni_player_prepare_pcm(player, runtime); 799 break; 800 case SND_ST_UNIPERIF_TYPE_SPDIF: 801 ret = uni_player_prepare_iec958(player, runtime); 802 break; 803 case SND_ST_UNIPERIF_TYPE_TDM: 804 ret = uni_player_prepare_tdm(player, runtime); 805 break; 806 default: 807 dev_err(player->dev, "invalid player type\n"); 808 return -EINVAL; 809 } 810 811 if (ret) 812 return ret; 813 814 switch (player->daifmt & SND_SOC_DAIFMT_INV_MASK) { 815 case SND_SOC_DAIFMT_NB_NF: 816 SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player); 817 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player); 818 break; 819 case SND_SOC_DAIFMT_NB_IF: 820 SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player); 821 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player); 822 break; 823 case SND_SOC_DAIFMT_IB_NF: 824 SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player); 825 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player); 826 break; 827 case SND_SOC_DAIFMT_IB_IF: 828 SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player); 829 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player); 830 break; 831 } 832 833 switch (player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) { 834 case SND_SOC_DAIFMT_I2S: 835 SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player); 836 SET_UNIPERIF_I2S_FMT_PADDING_I2S_MODE(player); 837 break; 838 case SND_SOC_DAIFMT_LEFT_J: 839 SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player); 840 SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player); 841 break; 842 case SND_SOC_DAIFMT_RIGHT_J: 843 SET_UNIPERIF_I2S_FMT_ALIGN_RIGHT(player); 844 SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player); 845 break; 846 default: 847 dev_err(player->dev, "format not supported\n"); 848 return -EINVAL; 849 } 850 851 SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(player, 0); 852 853 854 return sti_uniperiph_reset(player); 855 } 856 857 static int uni_player_start(struct uniperif *player) 858 { 859 int ret; 860 861 /* The player should be stopped */ 862 if (player->state != UNIPERIF_STATE_STOPPED) { 863 dev_err(player->dev, "%s: invalid player state\n", __func__); 864 return -EINVAL; 865 } 866 867 ret = clk_prepare_enable(player->clk); 868 if (ret) { 869 dev_err(player->dev, "%s: Failed to enable clock\n", __func__); 870 return ret; 871 } 872 873 /* Clear any pending interrupts */ 874 SET_UNIPERIF_ITS_BCLR(player, GET_UNIPERIF_ITS(player)); 875 876 /* Set the interrupt mask */ 877 SET_UNIPERIF_ITM_BSET_DMA_ERROR(player); 878 SET_UNIPERIF_ITM_BSET_FIFO_ERROR(player); 879 880 /* Enable underflow recovery interrupts */ 881 if (player->underflow_enabled) { 882 SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(player); 883 SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(player); 884 } 885 886 ret = sti_uniperiph_reset(player); 887 if (ret < 0) { 888 clk_disable_unprepare(player->clk); 889 return ret; 890 } 891 892 /* 893 * Does not use IEC61937 features of the uniperipheral hardware. 894 * Instead it performs IEC61937 in software and inserts it directly 895 * into the audio data stream. As such, when encoded mode is selected, 896 * linear pcm mode is still used, but with the differences of the 897 * channel status bits set for encoded mode and the validity bits set. 898 */ 899 SET_UNIPERIF_CTRL_OPERATION_PCM_DATA(player); 900 901 /* 902 * If iec958 formatting is required for hdmi or spdif, then it must be 903 * enabled after the operation mode is set. If set prior to this, it 904 * will not take affect and hang the player. 905 */ 906 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) 907 if (UNIPERIF_TYPE_IS_IEC958(player)) 908 SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player); 909 910 /* Force channel status update (no update if clk disable) */ 911 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) 912 SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player); 913 else 914 SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player); 915 916 /* Update state to started */ 917 player->state = UNIPERIF_STATE_STARTED; 918 919 return 0; 920 } 921 922 static int uni_player_stop(struct uniperif *player) 923 { 924 int ret; 925 926 /* The player should not be in stopped state */ 927 if (player->state == UNIPERIF_STATE_STOPPED) { 928 dev_err(player->dev, "%s: invalid player state\n", __func__); 929 return -EINVAL; 930 } 931 932 /* Turn the player off */ 933 SET_UNIPERIF_CTRL_OPERATION_OFF(player); 934 935 ret = sti_uniperiph_reset(player); 936 if (ret < 0) 937 return ret; 938 939 /* Disable interrupts */ 940 SET_UNIPERIF_ITM_BCLR(player, GET_UNIPERIF_ITM(player)); 941 942 /* Disable clock */ 943 clk_disable_unprepare(player->clk); 944 945 /* Update state to stopped and return */ 946 player->state = UNIPERIF_STATE_STOPPED; 947 948 return 0; 949 } 950 951 int uni_player_resume(struct uniperif *player) 952 { 953 int ret; 954 955 /* Select the frequency synthesizer clock */ 956 if (player->clk_sel) { 957 ret = regmap_field_write(player->clk_sel, 1); 958 if (ret) { 959 dev_err(player->dev, 960 "%s: Failed to select freq synth clock\n", 961 __func__); 962 return ret; 963 } 964 } 965 966 SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player); 967 SET_UNIPERIF_CTRL_ROUNDING_OFF(player); 968 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player); 969 SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player); 970 971 return 0; 972 } 973 EXPORT_SYMBOL_GPL(uni_player_resume); 974 975 static int uni_player_trigger(struct snd_pcm_substream *substream, 976 int cmd, struct snd_soc_dai *dai) 977 { 978 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 979 struct uniperif *player = priv->dai_data.uni; 980 981 switch (cmd) { 982 case SNDRV_PCM_TRIGGER_START: 983 return uni_player_start(player); 984 case SNDRV_PCM_TRIGGER_STOP: 985 return uni_player_stop(player); 986 case SNDRV_PCM_TRIGGER_RESUME: 987 return uni_player_resume(player); 988 default: 989 return -EINVAL; 990 } 991 } 992 993 static void uni_player_shutdown(struct snd_pcm_substream *substream, 994 struct snd_soc_dai *dai) 995 { 996 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 997 struct uniperif *player = priv->dai_data.uni; 998 unsigned long flags; 999 1000 spin_lock_irqsave(&player->irq_lock, flags); 1001 if (player->state != UNIPERIF_STATE_STOPPED) 1002 /* Stop the player */ 1003 uni_player_stop(player); 1004 1005 player->substream = NULL; 1006 spin_unlock_irqrestore(&player->irq_lock, flags); 1007 } 1008 1009 static int uni_player_parse_dt_audio_glue(struct platform_device *pdev, 1010 struct uniperif *player) 1011 { 1012 struct device_node *node = pdev->dev.of_node; 1013 struct regmap *regmap; 1014 struct reg_field regfield[2] = { 1015 /* PCM_CLK_SEL */ 1016 REG_FIELD(SYS_CFG_AUDIO_GLUE, 1017 8 + player->id, 1018 8 + player->id), 1019 /* PCMP_VALID_SEL */ 1020 REG_FIELD(SYS_CFG_AUDIO_GLUE, 0, 1) 1021 }; 1022 1023 regmap = syscon_regmap_lookup_by_phandle(node, "st,syscfg"); 1024 1025 if (IS_ERR(regmap)) { 1026 dev_err(&pdev->dev, "sti-audio-clk-glue syscf not found\n"); 1027 return PTR_ERR(regmap); 1028 } 1029 1030 player->clk_sel = regmap_field_alloc(regmap, regfield[0]); 1031 player->valid_sel = regmap_field_alloc(regmap, regfield[1]); 1032 1033 return 0; 1034 } 1035 1036 static const struct snd_soc_dai_ops uni_player_dai_ops = { 1037 .startup = uni_player_startup, 1038 .shutdown = uni_player_shutdown, 1039 .prepare = uni_player_prepare, 1040 .trigger = uni_player_trigger, 1041 .hw_params = sti_uniperiph_dai_hw_params, 1042 .set_fmt = sti_uniperiph_dai_set_fmt, 1043 .set_sysclk = uni_player_set_sysclk, 1044 .set_tdm_slot = sti_uniperiph_set_tdm_slot 1045 }; 1046 1047 int uni_player_init(struct platform_device *pdev, 1048 struct uniperif *player) 1049 { 1050 int ret = 0; 1051 1052 player->dev = &pdev->dev; 1053 player->state = UNIPERIF_STATE_STOPPED; 1054 player->dai_ops = &uni_player_dai_ops; 1055 1056 /* Get PCM_CLK_SEL & PCMP_VALID_SEL from audio-glue-ctrl SoC reg */ 1057 ret = uni_player_parse_dt_audio_glue(pdev, player); 1058 1059 if (ret < 0) { 1060 dev_err(player->dev, "Failed to parse DeviceTree\n"); 1061 return ret; 1062 } 1063 1064 /* Underflow recovery is only supported on later ip revisions */ 1065 if (player->ver >= SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) 1066 player->underflow_enabled = 1; 1067 1068 if (UNIPERIF_TYPE_IS_TDM(player)) 1069 player->hw = &uni_tdm_hw; 1070 else 1071 player->hw = &uni_player_pcm_hw; 1072 1073 /* Get uniperif resource */ 1074 player->clk = of_clk_get(pdev->dev.of_node, 0); 1075 if (IS_ERR(player->clk)) { 1076 dev_err(player->dev, "Failed to get clock\n"); 1077 return PTR_ERR(player->clk); 1078 } 1079 1080 /* Select the frequency synthesizer clock */ 1081 if (player->clk_sel) { 1082 ret = regmap_field_write(player->clk_sel, 1); 1083 if (ret) { 1084 dev_err(player->dev, 1085 "%s: Failed to select freq synth clock\n", 1086 __func__); 1087 return ret; 1088 } 1089 } 1090 1091 /* connect to I2S/TDM TX bus */ 1092 if (player->valid_sel && 1093 (player->id == UNIPERIF_PLAYER_I2S_OUT)) { 1094 ret = regmap_field_write(player->valid_sel, player->id); 1095 if (ret) { 1096 dev_err(player->dev, 1097 "%s: unable to connect to tdm bus\n", __func__); 1098 return ret; 1099 } 1100 } 1101 1102 ret = devm_request_irq(&pdev->dev, player->irq, 1103 uni_player_irq_handler, IRQF_SHARED, 1104 dev_name(&pdev->dev), player); 1105 if (ret < 0) { 1106 dev_err(player->dev, "unable to request IRQ %d\n", player->irq); 1107 return ret; 1108 } 1109 1110 mutex_init(&player->ctrl_lock); 1111 spin_lock_init(&player->irq_lock); 1112 1113 /* Ensure that disabled by default */ 1114 SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player); 1115 SET_UNIPERIF_CTRL_ROUNDING_OFF(player); 1116 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player); 1117 SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player); 1118 1119 if (UNIPERIF_TYPE_IS_IEC958(player)) { 1120 /* Set default iec958 status bits */ 1121 1122 /* Consumer, PCM, copyright, 2ch, mode 0 */ 1123 player->stream_settings.iec958.status[0] = 0x00; 1124 /* Broadcast reception category */ 1125 player->stream_settings.iec958.status[1] = 1126 IEC958_AES1_CON_GENERAL; 1127 /* Do not take into account source or channel number */ 1128 player->stream_settings.iec958.status[2] = 1129 IEC958_AES2_CON_SOURCE_UNSPEC; 1130 /* Sampling frequency not indicated */ 1131 player->stream_settings.iec958.status[3] = 1132 IEC958_AES3_CON_FS_NOTID; 1133 /* Max sample word 24-bit, sample word length not indicated */ 1134 player->stream_settings.iec958.status[4] = 1135 IEC958_AES4_CON_MAX_WORDLEN_24 | 1136 IEC958_AES4_CON_WORDLEN_24_20; 1137 1138 player->num_ctrls = ARRAY_SIZE(snd_sti_iec_ctl); 1139 player->snd_ctrls = snd_sti_iec_ctl[0]; 1140 } else { 1141 player->num_ctrls = ARRAY_SIZE(snd_sti_pcm_ctl); 1142 player->snd_ctrls = snd_sti_pcm_ctl[0]; 1143 } 1144 1145 return 0; 1146 } 1147 EXPORT_SYMBOL_GPL(uni_player_init); 1148