1150 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) STMicroelectronics SA 20154 * 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 definitions18 */19 20/* sys config registers definitions */21#define SYS_CFG_AUDIO_GLUE 0xA422 23/*24 * Driver specific types.25 */26 27#define UNIPERIF_PLAYER_CLK_ADJ_MIN -99999928#define UNIPERIF_PLAYER_CLK_ADJ_MAX 100000029#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 to33 * integrate DAI_CPU capability in term of rate and supported channels34 */35static 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_SIZE54};55 56/*57 * uni_player_irq_handler58 * In case of error audio stream is stopped; stop action is protected via PCM59 * stream lock to avoid race condition with trigger callback.60 */61static 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(player->substream, SNDRV_PCM_STATE_XRUN);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(player->substream, SNDRV_PCM_STATE_XRUN);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(player->substream, SNDRV_PCM_STATE_XRUN);142 143 ret = IRQ_HANDLED;144 }145 146stream_unlock:147 snd_pcm_stream_unlock(player->substream);148irq_spin_unlock:149 spin_unlock(&player->irq_lock);150 151 return ret;152}153 154static 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 * a161 * F = f + --------- * f = f + d162 * 1000000163 *164 * a165 * d = --------- * f166 * 1000000167 *168 * where:169 * f - nominal rate170 * a - adjustment in ppm (parts per milion)171 * F - rate to be set in synthesizer172 * d - delta (difference) between f and F173 */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 up201 * to twice as much as requested, but no more202 */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 218static 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 correct226 * sampling frequency. If no sample rate is already specified, then227 * 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 mode277 */278 if (player->stream_settings.iec958.status[0] & IEC958_AES0_NONAUDIO)279 player->stream_settings.encoding_mode =280 UNIPERIF_IEC958_ENCODING_MODE_ENCODED;281 else282 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 else290 /* 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 else310 SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player);311}312 313static 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 else390 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 function405 * uni_player_start() at the same time as the operation406 * 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 else411 SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player);412 413 return 0;414}415 416static 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 else426 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 64434 */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 FIFO448 */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 bits473 * 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 509static 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 controls560 */561static 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 570static 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 587static 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 else607 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 615static 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 control625 */626static 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 638static 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 652static 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 674static 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 682static struct snd_kcontrol_new *snd_sti_pcm_ctl[] = {683 &uni_player_clk_adj_ctl,684};685 686static struct snd_kcontrol_new *snd_sti_iec_ctl[] = {687 &uni_player_iec958_ctl,688 &uni_player_clk_adj_ctl,689};690 691static 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 724static 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 746static 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_0777 * FDMA_TRIGGER_LIMIT also controls when the state switches778 * 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 858static 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 directly896 * into the audio data stream. As such, when encoded mode is selected,897 * linear pcm mode is still used, but with the differences of the898 * 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 be904 * enabled after the operation mode is set. If set prior to this, it905 * 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 else915 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 923static 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 952int 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}974EXPORT_SYMBOL_GPL(uni_player_resume);975 976static 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 994static 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 1010static 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 1037static 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 .probe = sti_uniperiph_dai_probe,1042 .trigger = uni_player_trigger,1043 .hw_params = sti_uniperiph_dai_hw_params,1044 .set_fmt = sti_uniperiph_dai_set_fmt,1045 .set_sysclk = uni_player_set_sysclk,1046 .set_tdm_slot = sti_uniperiph_set_tdm_slot1047};1048 1049int uni_player_init(struct platform_device *pdev,1050 struct uniperif *player)1051{1052 int ret = 0;1053 1054 player->dev = &pdev->dev;1055 player->state = UNIPERIF_STATE_STOPPED;1056 player->dai_ops = &uni_player_dai_ops;1057 1058 /* Get PCM_CLK_SEL & PCMP_VALID_SEL from audio-glue-ctrl SoC reg */1059 ret = uni_player_parse_dt_audio_glue(pdev, player);1060 1061 if (ret < 0) {1062 dev_err(player->dev, "Failed to parse DeviceTree\n");1063 return ret;1064 }1065 1066 /* Underflow recovery is only supported on later ip revisions */1067 if (player->ver >= SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)1068 player->underflow_enabled = 1;1069 1070 if (UNIPERIF_TYPE_IS_TDM(player))1071 player->hw = &uni_tdm_hw;1072 else1073 player->hw = &uni_player_pcm_hw;1074 1075 /* Get uniperif resource */1076 player->clk = of_clk_get(pdev->dev.of_node, 0);1077 if (IS_ERR(player->clk)) {1078 dev_err(player->dev, "Failed to get clock\n");1079 return PTR_ERR(player->clk);1080 }1081 1082 /* Select the frequency synthesizer clock */1083 if (player->clk_sel) {1084 ret = regmap_field_write(player->clk_sel, 1);1085 if (ret) {1086 dev_err(player->dev,1087 "%s: Failed to select freq synth clock\n",1088 __func__);1089 return ret;1090 }1091 }1092 1093 /* connect to I2S/TDM TX bus */1094 if (player->valid_sel &&1095 (player->id == UNIPERIF_PLAYER_I2S_OUT)) {1096 ret = regmap_field_write(player->valid_sel, player->id);1097 if (ret) {1098 dev_err(player->dev,1099 "%s: unable to connect to tdm bus\n", __func__);1100 return ret;1101 }1102 }1103 1104 ret = devm_request_irq(&pdev->dev, player->irq,1105 uni_player_irq_handler, IRQF_SHARED,1106 dev_name(&pdev->dev), player);1107 if (ret < 0) {1108 dev_err(player->dev, "unable to request IRQ %d\n", player->irq);1109 return ret;1110 }1111 1112 mutex_init(&player->ctrl_lock);1113 spin_lock_init(&player->irq_lock);1114 1115 /* Ensure that disabled by default */1116 SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player);1117 SET_UNIPERIF_CTRL_ROUNDING_OFF(player);1118 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);1119 SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player);1120 1121 if (UNIPERIF_TYPE_IS_IEC958(player)) {1122 /* Set default iec958 status bits */1123 1124 /* Consumer, PCM, copyright, 2ch, mode 0 */1125 player->stream_settings.iec958.status[0] = 0x00;1126 /* Broadcast reception category */1127 player->stream_settings.iec958.status[1] =1128 IEC958_AES1_CON_GENERAL;1129 /* Do not take into account source or channel number */1130 player->stream_settings.iec958.status[2] =1131 IEC958_AES2_CON_SOURCE_UNSPEC;1132 /* Sampling frequency not indicated */1133 player->stream_settings.iec958.status[3] =1134 IEC958_AES3_CON_FS_NOTID;1135 /* Max sample word 24-bit, sample word length not indicated */1136 player->stream_settings.iec958.status[4] =1137 IEC958_AES4_CON_MAX_WORDLEN_24 |1138 IEC958_AES4_CON_WORDLEN_24_20;1139 1140 player->num_ctrls = ARRAY_SIZE(snd_sti_iec_ctl);1141 player->snd_ctrls = snd_sti_iec_ctl[0];1142 } else {1143 player->num_ctrls = ARRAY_SIZE(snd_sti_pcm_ctl);1144 player->snd_ctrls = snd_sti_pcm_ctl[0];1145 }1146 1147 return 0;1148}1149EXPORT_SYMBOL_GPL(uni_player_init);1150