1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) STMicroelectronics SA 2015 4 * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com> 5 * for STMicroelectronics. 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 if (runtime) { 230 switch (runtime->rate) { 231 case 22050: 232 player->stream_settings.iec958.status[3] = 233 IEC958_AES3_CON_FS_22050; 234 break; 235 case 44100: 236 player->stream_settings.iec958.status[3] = 237 IEC958_AES3_CON_FS_44100; 238 break; 239 case 88200: 240 player->stream_settings.iec958.status[3] = 241 IEC958_AES3_CON_FS_88200; 242 break; 243 case 176400: 244 player->stream_settings.iec958.status[3] = 245 IEC958_AES3_CON_FS_176400; 246 break; 247 case 24000: 248 player->stream_settings.iec958.status[3] = 249 IEC958_AES3_CON_FS_24000; 250 break; 251 case 48000: 252 player->stream_settings.iec958.status[3] = 253 IEC958_AES3_CON_FS_48000; 254 break; 255 case 96000: 256 player->stream_settings.iec958.status[3] = 257 IEC958_AES3_CON_FS_96000; 258 break; 259 case 192000: 260 player->stream_settings.iec958.status[3] = 261 IEC958_AES3_CON_FS_192000; 262 break; 263 case 32000: 264 player->stream_settings.iec958.status[3] = 265 IEC958_AES3_CON_FS_32000; 266 break; 267 default: 268 /* Mark as sampling frequency not indicated */ 269 player->stream_settings.iec958.status[3] = 270 IEC958_AES3_CON_FS_NOTID; 271 break; 272 } 273 } 274 275 /* Audio mode: 276 * Use audio mode status to select PCM or encoded mode 277 */ 278 if (player->stream_settings.iec958.status[0] & IEC958_AES0_NONAUDIO) 279 player->stream_settings.encoding_mode = 280 UNIPERIF_IEC958_ENCODING_MODE_ENCODED; 281 else 282 player->stream_settings.encoding_mode = 283 UNIPERIF_IEC958_ENCODING_MODE_PCM; 284 285 if (player->stream_settings.encoding_mode == 286 UNIPERIF_IEC958_ENCODING_MODE_PCM) 287 /* Clear user validity bits */ 288 SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0); 289 else 290 /* Set user validity bits */ 291 SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 1); 292 293 /* Program the new channel status */ 294 for (n = 0; n < 6; ++n) { 295 status = 296 player->stream_settings.iec958.status[0 + (n * 4)] & 0xf; 297 status |= 298 player->stream_settings.iec958.status[1 + (n * 4)] << 8; 299 status |= 300 player->stream_settings.iec958.status[2 + (n * 4)] << 16; 301 status |= 302 player->stream_settings.iec958.status[3 + (n * 4)] << 24; 303 SET_UNIPERIF_CHANNEL_STA_REGN(player, n, status); 304 } 305 306 /* Update the channel status */ 307 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) 308 SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player); 309 else 310 SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player); 311 } 312 313 static int uni_player_prepare_iec958(struct uniperif *player, 314 struct snd_pcm_runtime *runtime) 315 { 316 int clk_div; 317 318 clk_div = player->mclk / runtime->rate; 319 320 /* Oversampling must be multiple of 128 as iec958 frame is 32-bits */ 321 if ((clk_div % 128) || (clk_div <= 0)) { 322 dev_err(player->dev, "%s: invalid clk_div %d\n", 323 __func__, clk_div); 324 return -EINVAL; 325 } 326 327 switch (runtime->format) { 328 case SNDRV_PCM_FORMAT_S16_LE: 329 /* 16/16 memory format */ 330 SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player); 331 /* 16-bits per sub-frame */ 332 SET_UNIPERIF_I2S_FMT_NBIT_32(player); 333 /* Set 16-bit sample precision */ 334 SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player); 335 break; 336 case SNDRV_PCM_FORMAT_S32_LE: 337 /* 16/0 memory format */ 338 SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player); 339 /* 32-bits per sub-frame */ 340 SET_UNIPERIF_I2S_FMT_NBIT_32(player); 341 /* Set 24-bit sample precision */ 342 SET_UNIPERIF_I2S_FMT_DATA_SIZE_24(player); 343 break; 344 default: 345 dev_err(player->dev, "format not supported\n"); 346 return -EINVAL; 347 } 348 349 /* Set parity to be calculated by the hardware */ 350 SET_UNIPERIF_CONFIG_PARITY_CNTR_BY_HW(player); 351 352 /* Set channel status bits to be inserted by the hardware */ 353 SET_UNIPERIF_CONFIG_CHANNEL_STA_CNTR_BY_HW(player); 354 355 /* Set user data bits to be inserted by the hardware */ 356 SET_UNIPERIF_CONFIG_USER_DAT_CNTR_BY_HW(player); 357 358 /* Set validity bits to be inserted by the hardware */ 359 SET_UNIPERIF_CONFIG_VALIDITY_DAT_CNTR_BY_HW(player); 360 361 /* Set full software control to disabled */ 362 SET_UNIPERIF_CONFIG_SPDIF_SW_CTRL_DISABLE(player); 363 364 SET_UNIPERIF_CTRL_ZERO_STUFF_HW(player); 365 366 mutex_lock(&player->ctrl_lock); 367 /* Update the channel status */ 368 uni_player_set_channel_status(player, runtime); 369 mutex_unlock(&player->ctrl_lock); 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]; 601 602 spin_lock_irqsave(&player->irq_lock, flags); 603 if (player->substream && player->substream->runtime) 604 uni_player_set_channel_status(player, 605 player->substream->runtime); 606 else 607 uni_player_set_channel_status(player, NULL); 608 609 spin_unlock_irqrestore(&player->irq_lock, flags); 610 mutex_unlock(&player->ctrl_lock); 611 612 return 0; 613 } 614 615 static struct snd_kcontrol_new uni_player_iec958_ctl = { 616 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 617 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT), 618 .info = uni_player_ctl_iec958_info, 619 .get = uni_player_ctl_iec958_get, 620 .put = uni_player_ctl_iec958_put, 621 }; 622 623 /* 624 * uniperif rate adjustement control 625 */ 626 static int snd_sti_clk_adjustment_info(struct snd_kcontrol *kcontrol, 627 struct snd_ctl_elem_info *uinfo) 628 { 629 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 630 uinfo->count = 1; 631 uinfo->value.integer.min = UNIPERIF_PLAYER_CLK_ADJ_MIN; 632 uinfo->value.integer.max = UNIPERIF_PLAYER_CLK_ADJ_MAX; 633 uinfo->value.integer.step = 1; 634 635 return 0; 636 } 637 638 static int snd_sti_clk_adjustment_get(struct snd_kcontrol *kcontrol, 639 struct snd_ctl_elem_value *ucontrol) 640 { 641 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 642 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 643 struct uniperif *player = priv->dai_data.uni; 644 645 mutex_lock(&player->ctrl_lock); 646 ucontrol->value.integer.value[0] = player->clk_adj; 647 mutex_unlock(&player->ctrl_lock); 648 649 return 0; 650 } 651 652 static int snd_sti_clk_adjustment_put(struct snd_kcontrol *kcontrol, 653 struct snd_ctl_elem_value *ucontrol) 654 { 655 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 656 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 657 struct uniperif *player = priv->dai_data.uni; 658 int ret = 0; 659 660 if ((ucontrol->value.integer.value[0] < UNIPERIF_PLAYER_CLK_ADJ_MIN) || 661 (ucontrol->value.integer.value[0] > UNIPERIF_PLAYER_CLK_ADJ_MAX)) 662 return -EINVAL; 663 664 mutex_lock(&player->ctrl_lock); 665 player->clk_adj = ucontrol->value.integer.value[0]; 666 667 if (player->mclk) 668 ret = uni_player_clk_set_rate(player, player->mclk); 669 mutex_unlock(&player->ctrl_lock); 670 671 return ret; 672 } 673 674 static struct snd_kcontrol_new uni_player_clk_adj_ctl = { 675 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 676 .name = "PCM Playback Oversampling Freq. Adjustment", 677 .info = snd_sti_clk_adjustment_info, 678 .get = snd_sti_clk_adjustment_get, 679 .put = snd_sti_clk_adjustment_put, 680 }; 681 682 static struct snd_kcontrol_new *snd_sti_pcm_ctl[] = { 683 &uni_player_clk_adj_ctl, 684 }; 685 686 static struct snd_kcontrol_new *snd_sti_iec_ctl[] = { 687 &uni_player_iec958_ctl, 688 &uni_player_clk_adj_ctl, 689 }; 690 691 static int uni_player_startup(struct snd_pcm_substream *substream, 692 struct snd_soc_dai *dai) 693 { 694 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 695 struct uniperif *player = priv->dai_data.uni; 696 unsigned long flags; 697 int ret; 698 699 spin_lock_irqsave(&player->irq_lock, flags); 700 player->substream = substream; 701 spin_unlock_irqrestore(&player->irq_lock, flags); 702 703 player->clk_adj = 0; 704 705 if (!UNIPERIF_TYPE_IS_TDM(player)) 706 return 0; 707 708 /* refine hw constraint in tdm mode */ 709 ret = snd_pcm_hw_rule_add(substream->runtime, 0, 710 SNDRV_PCM_HW_PARAM_CHANNELS, 711 sti_uniperiph_fix_tdm_chan, 712 player, SNDRV_PCM_HW_PARAM_CHANNELS, 713 -1); 714 if (ret < 0) 715 return ret; 716 717 return snd_pcm_hw_rule_add(substream->runtime, 0, 718 SNDRV_PCM_HW_PARAM_FORMAT, 719 sti_uniperiph_fix_tdm_format, 720 player, SNDRV_PCM_HW_PARAM_FORMAT, 721 -1); 722 } 723 724 static int uni_player_set_sysclk(struct snd_soc_dai *dai, int clk_id, 725 unsigned int freq, int dir) 726 { 727 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 728 struct uniperif *player = priv->dai_data.uni; 729 int ret; 730 731 if (UNIPERIF_TYPE_IS_TDM(player) || (dir == SND_SOC_CLOCK_IN)) 732 return 0; 733 734 if (clk_id != 0) 735 return -EINVAL; 736 737 mutex_lock(&player->ctrl_lock); 738 ret = uni_player_clk_set_rate(player, freq); 739 if (!ret) 740 player->mclk = freq; 741 mutex_unlock(&player->ctrl_lock); 742 743 return ret; 744 } 745 746 static int uni_player_prepare(struct snd_pcm_substream *substream, 747 struct snd_soc_dai *dai) 748 { 749 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 750 struct uniperif *player = priv->dai_data.uni; 751 struct snd_pcm_runtime *runtime = substream->runtime; 752 int transfer_size, trigger_limit; 753 int ret; 754 755 /* The player should be stopped */ 756 if (player->state != UNIPERIF_STATE_STOPPED) { 757 dev_err(player->dev, "%s: invalid player state %d\n", __func__, 758 player->state); 759 return -EINVAL; 760 } 761 762 /* Calculate transfer size (in fifo cells and bytes) for frame count */ 763 if (player->type == SND_ST_UNIPERIF_TYPE_TDM) { 764 /* transfer size = user frame size (in 32 bits FIFO cell) */ 765 transfer_size = 766 sti_uniperiph_get_user_frame_size(runtime) / 4; 767 } else { 768 transfer_size = runtime->channels * UNIPERIF_FIFO_FRAMES; 769 } 770 771 /* Calculate number of empty cells available before asserting DREQ */ 772 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) { 773 trigger_limit = UNIPERIF_FIFO_SIZE - transfer_size; 774 } else { 775 /* 776 * Since SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0 777 * FDMA_TRIGGER_LIMIT also controls when the state switches 778 * from OFF or STANDBY to AUDIO DATA. 779 */ 780 trigger_limit = transfer_size; 781 } 782 783 /* Trigger limit must be an even number */ 784 if ((!trigger_limit % 2) || (trigger_limit != 1 && transfer_size % 2) || 785 (trigger_limit > UNIPERIF_CONFIG_DMA_TRIG_LIMIT_MASK(player))) { 786 dev_err(player->dev, "invalid trigger limit %d\n", 787 trigger_limit); 788 return -EINVAL; 789 } 790 791 SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(player, trigger_limit); 792 793 /* Uniperipheral setup depends on player type */ 794 switch (player->type) { 795 case SND_ST_UNIPERIF_TYPE_HDMI: 796 ret = uni_player_prepare_iec958(player, runtime); 797 break; 798 case SND_ST_UNIPERIF_TYPE_PCM: 799 ret = uni_player_prepare_pcm(player, runtime); 800 break; 801 case SND_ST_UNIPERIF_TYPE_SPDIF: 802 ret = uni_player_prepare_iec958(player, runtime); 803 break; 804 case SND_ST_UNIPERIF_TYPE_TDM: 805 ret = uni_player_prepare_tdm(player, runtime); 806 break; 807 default: 808 dev_err(player->dev, "invalid player type\n"); 809 return -EINVAL; 810 } 811 812 if (ret) 813 return ret; 814 815 switch (player->daifmt & SND_SOC_DAIFMT_INV_MASK) { 816 case SND_SOC_DAIFMT_NB_NF: 817 SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player); 818 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player); 819 break; 820 case SND_SOC_DAIFMT_NB_IF: 821 SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player); 822 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player); 823 break; 824 case SND_SOC_DAIFMT_IB_NF: 825 SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player); 826 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player); 827 break; 828 case SND_SOC_DAIFMT_IB_IF: 829 SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player); 830 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player); 831 break; 832 } 833 834 switch (player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) { 835 case SND_SOC_DAIFMT_I2S: 836 SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player); 837 SET_UNIPERIF_I2S_FMT_PADDING_I2S_MODE(player); 838 break; 839 case SND_SOC_DAIFMT_LEFT_J: 840 SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player); 841 SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player); 842 break; 843 case SND_SOC_DAIFMT_RIGHT_J: 844 SET_UNIPERIF_I2S_FMT_ALIGN_RIGHT(player); 845 SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player); 846 break; 847 default: 848 dev_err(player->dev, "format not supported\n"); 849 return -EINVAL; 850 } 851 852 SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(player, 0); 853 854 855 return sti_uniperiph_reset(player); 856 } 857 858 static int uni_player_start(struct uniperif *player) 859 { 860 int ret; 861 862 /* The player should be stopped */ 863 if (player->state != UNIPERIF_STATE_STOPPED) { 864 dev_err(player->dev, "%s: invalid player state\n", __func__); 865 return -EINVAL; 866 } 867 868 ret = clk_prepare_enable(player->clk); 869 if (ret) { 870 dev_err(player->dev, "%s: Failed to enable clock\n", __func__); 871 return ret; 872 } 873 874 /* Clear any pending interrupts */ 875 SET_UNIPERIF_ITS_BCLR(player, GET_UNIPERIF_ITS(player)); 876 877 /* Set the interrupt mask */ 878 SET_UNIPERIF_ITM_BSET_DMA_ERROR(player); 879 SET_UNIPERIF_ITM_BSET_FIFO_ERROR(player); 880 881 /* Enable underflow recovery interrupts */ 882 if (player->underflow_enabled) { 883 SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(player); 884 SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(player); 885 } 886 887 ret = sti_uniperiph_reset(player); 888 if (ret < 0) { 889 clk_disable_unprepare(player->clk); 890 return ret; 891 } 892 893 /* 894 * Does not use IEC61937 features of the uniperipheral hardware. 895 * Instead it performs IEC61937 in software and inserts it directly 896 * into the audio data stream. As such, when encoded mode is selected, 897 * linear pcm mode is still used, but with the differences of the 898 * channel status bits set for encoded mode and the validity bits set. 899 */ 900 SET_UNIPERIF_CTRL_OPERATION_PCM_DATA(player); 901 902 /* 903 * If iec958 formatting is required for hdmi or spdif, then it must be 904 * enabled after the operation mode is set. If set prior to this, it 905 * will not take affect and hang the player. 906 */ 907 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) 908 if (UNIPERIF_TYPE_IS_IEC958(player)) 909 SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player); 910 911 /* Force channel status update (no update if clk disable) */ 912 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) 913 SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player); 914 else 915 SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player); 916 917 /* Update state to started */ 918 player->state = UNIPERIF_STATE_STARTED; 919 920 return 0; 921 } 922 923 static int uni_player_stop(struct uniperif *player) 924 { 925 int ret; 926 927 /* The player should not be in stopped state */ 928 if (player->state == UNIPERIF_STATE_STOPPED) { 929 dev_err(player->dev, "%s: invalid player state\n", __func__); 930 return -EINVAL; 931 } 932 933 /* Turn the player off */ 934 SET_UNIPERIF_CTRL_OPERATION_OFF(player); 935 936 ret = sti_uniperiph_reset(player); 937 if (ret < 0) 938 return ret; 939 940 /* Disable interrupts */ 941 SET_UNIPERIF_ITM_BCLR(player, GET_UNIPERIF_ITM(player)); 942 943 /* Disable clock */ 944 clk_disable_unprepare(player->clk); 945 946 /* Update state to stopped and return */ 947 player->state = UNIPERIF_STATE_STOPPED; 948 949 return 0; 950 } 951 952 int uni_player_resume(struct uniperif *player) 953 { 954 int ret; 955 956 /* Select the frequency synthesizer clock */ 957 if (player->clk_sel) { 958 ret = regmap_field_write(player->clk_sel, 1); 959 if (ret) { 960 dev_err(player->dev, 961 "%s: Failed to select freq synth clock\n", 962 __func__); 963 return ret; 964 } 965 } 966 967 SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player); 968 SET_UNIPERIF_CTRL_ROUNDING_OFF(player); 969 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player); 970 SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player); 971 972 return 0; 973 } 974 EXPORT_SYMBOL_GPL(uni_player_resume); 975 976 static int uni_player_trigger(struct snd_pcm_substream *substream, 977 int cmd, struct snd_soc_dai *dai) 978 { 979 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 980 struct uniperif *player = priv->dai_data.uni; 981 982 switch (cmd) { 983 case SNDRV_PCM_TRIGGER_START: 984 return uni_player_start(player); 985 case SNDRV_PCM_TRIGGER_STOP: 986 return uni_player_stop(player); 987 case SNDRV_PCM_TRIGGER_RESUME: 988 return uni_player_resume(player); 989 default: 990 return -EINVAL; 991 } 992 } 993 994 static void uni_player_shutdown(struct snd_pcm_substream *substream, 995 struct snd_soc_dai *dai) 996 { 997 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 998 struct uniperif *player = priv->dai_data.uni; 999 unsigned long flags; 1000 1001 spin_lock_irqsave(&player->irq_lock, flags); 1002 if (player->state != UNIPERIF_STATE_STOPPED) 1003 /* Stop the player */ 1004 uni_player_stop(player); 1005 1006 player->substream = NULL; 1007 spin_unlock_irqrestore(&player->irq_lock, flags); 1008 } 1009 1010 static int uni_player_parse_dt_audio_glue(struct platform_device *pdev, 1011 struct uniperif *player) 1012 { 1013 struct device_node *node = pdev->dev.of_node; 1014 struct regmap *regmap; 1015 struct reg_field regfield[2] = { 1016 /* PCM_CLK_SEL */ 1017 REG_FIELD(SYS_CFG_AUDIO_GLUE, 1018 8 + player->id, 1019 8 + player->id), 1020 /* PCMP_VALID_SEL */ 1021 REG_FIELD(SYS_CFG_AUDIO_GLUE, 0, 1) 1022 }; 1023 1024 regmap = syscon_regmap_lookup_by_phandle(node, "st,syscfg"); 1025 1026 if (IS_ERR(regmap)) { 1027 dev_err(&pdev->dev, "sti-audio-clk-glue syscf not found\n"); 1028 return PTR_ERR(regmap); 1029 } 1030 1031 player->clk_sel = regmap_field_alloc(regmap, regfield[0]); 1032 player->valid_sel = regmap_field_alloc(regmap, regfield[1]); 1033 1034 return 0; 1035 } 1036 1037 static const struct snd_soc_dai_ops uni_player_dai_ops = { 1038 .startup = uni_player_startup, 1039 .shutdown = uni_player_shutdown, 1040 .prepare = uni_player_prepare, 1041 .trigger = uni_player_trigger, 1042 .hw_params = sti_uniperiph_dai_hw_params, 1043 .set_fmt = sti_uniperiph_dai_set_fmt, 1044 .set_sysclk = uni_player_set_sysclk, 1045 .set_tdm_slot = sti_uniperiph_set_tdm_slot 1046 }; 1047 1048 int uni_player_init(struct platform_device *pdev, 1049 struct uniperif *player) 1050 { 1051 int ret = 0; 1052 1053 player->dev = &pdev->dev; 1054 player->state = UNIPERIF_STATE_STOPPED; 1055 player->dai_ops = &uni_player_dai_ops; 1056 1057 /* Get PCM_CLK_SEL & PCMP_VALID_SEL from audio-glue-ctrl SoC reg */ 1058 ret = uni_player_parse_dt_audio_glue(pdev, player); 1059 1060 if (ret < 0) { 1061 dev_err(player->dev, "Failed to parse DeviceTree\n"); 1062 return ret; 1063 } 1064 1065 /* Underflow recovery is only supported on later ip revisions */ 1066 if (player->ver >= SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) 1067 player->underflow_enabled = 1; 1068 1069 if (UNIPERIF_TYPE_IS_TDM(player)) 1070 player->hw = &uni_tdm_hw; 1071 else 1072 player->hw = &uni_player_pcm_hw; 1073 1074 /* Get uniperif resource */ 1075 player->clk = of_clk_get(pdev->dev.of_node, 0); 1076 if (IS_ERR(player->clk)) { 1077 dev_err(player->dev, "Failed to get clock\n"); 1078 return PTR_ERR(player->clk); 1079 } 1080 1081 /* Select the frequency synthesizer clock */ 1082 if (player->clk_sel) { 1083 ret = regmap_field_write(player->clk_sel, 1); 1084 if (ret) { 1085 dev_err(player->dev, 1086 "%s: Failed to select freq synth clock\n", 1087 __func__); 1088 return ret; 1089 } 1090 } 1091 1092 /* connect to I2S/TDM TX bus */ 1093 if (player->valid_sel && 1094 (player->id == UNIPERIF_PLAYER_I2S_OUT)) { 1095 ret = regmap_field_write(player->valid_sel, player->id); 1096 if (ret) { 1097 dev_err(player->dev, 1098 "%s: unable to connect to tdm bus\n", __func__); 1099 return ret; 1100 } 1101 } 1102 1103 ret = devm_request_irq(&pdev->dev, player->irq, 1104 uni_player_irq_handler, IRQF_SHARED, 1105 dev_name(&pdev->dev), player); 1106 if (ret < 0) { 1107 dev_err(player->dev, "unable to request IRQ %d\n", player->irq); 1108 return ret; 1109 } 1110 1111 mutex_init(&player->ctrl_lock); 1112 spin_lock_init(&player->irq_lock); 1113 1114 /* Ensure that disabled by default */ 1115 SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player); 1116 SET_UNIPERIF_CTRL_ROUNDING_OFF(player); 1117 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player); 1118 SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player); 1119 1120 if (UNIPERIF_TYPE_IS_IEC958(player)) { 1121 /* Set default iec958 status bits */ 1122 1123 /* Consumer, PCM, copyright, 2ch, mode 0 */ 1124 player->stream_settings.iec958.status[0] = 0x00; 1125 /* Broadcast reception category */ 1126 player->stream_settings.iec958.status[1] = 1127 IEC958_AES1_CON_GENERAL; 1128 /* Do not take into account source or channel number */ 1129 player->stream_settings.iec958.status[2] = 1130 IEC958_AES2_CON_SOURCE_UNSPEC; 1131 /* Sampling frequency not indicated */ 1132 player->stream_settings.iec958.status[3] = 1133 IEC958_AES3_CON_FS_NOTID; 1134 /* Max sample word 24-bit, sample word length not indicated */ 1135 player->stream_settings.iec958.status[4] = 1136 IEC958_AES4_CON_MAX_WORDLEN_24 | 1137 IEC958_AES4_CON_WORDLEN_24_20; 1138 1139 player->num_ctrls = ARRAY_SIZE(snd_sti_iec_ctl); 1140 player->snd_ctrls = snd_sti_iec_ctl[0]; 1141 } else { 1142 player->num_ctrls = ARRAY_SIZE(snd_sti_pcm_ctl); 1143 player->snd_ctrls = snd_sti_pcm_ctl[0]; 1144 } 1145 1146 return 0; 1147 } 1148 EXPORT_SYMBOL_GPL(uni_player_init); 1149