1// SPDX-License-Identifier: GPL-2.0 2// 3// Driver for Microchip S/PDIF RX Controller 4// 5// Copyright (C) 2020 Microchip Technology Inc. and its subsidiaries 6// 7// Author: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> 8 9#include <linux/clk.h> 10#include <linux/io.h> 11#include <linux/module.h> 12#include <linux/pm_runtime.h> 13#include <linux/regmap.h> 14#include <linux/spinlock.h> 15 16#include <sound/dmaengine_pcm.h> 17#include <sound/pcm_params.h> 18#include <sound/soc.h> 19 20/* 21 * ---- S/PDIF Receiver Controller Register map ---- 22 */ 23#define SPDIFRX_CR 0x00 /* Control Register */ 24#define SPDIFRX_MR 0x04 /* Mode Register */ 25 26#define SPDIFRX_IER 0x10 /* Interrupt Enable Register */ 27#define SPDIFRX_IDR 0x14 /* Interrupt Disable Register */ 28#define SPDIFRX_IMR 0x18 /* Interrupt Mask Register */ 29#define SPDIFRX_ISR 0x1c /* Interrupt Status Register */ 30#define SPDIFRX_RSR 0x20 /* Status Register */ 31#define SPDIFRX_RHR 0x24 /* Holding Register */ 32 33#define SPDIFRX_CHSR(channel, reg) \ 34 (0x30 + (channel) * 0x30 + (reg) * 4) /* Channel x Status Registers */ 35 36#define SPDIFRX_CHUD(channel, reg) \ 37 (0x48 + (channel) * 0x30 + (reg) * 4) /* Channel x User Data Registers */ 38 39#define SPDIFRX_WPMR 0xE4 /* Write Protection Mode Register */ 40#define SPDIFRX_WPSR 0xE8 /* Write Protection Status Register */ 41 42#define SPDIFRX_VERSION 0xFC /* Version Register */ 43 44/* 45 * ---- Control Register (Write-only) ---- 46 */ 47#define SPDIFRX_CR_SWRST BIT(0) /* Software Reset */ 48 49/* 50 * ---- Mode Register (Read/Write) ---- 51 */ 52/* Receive Enable */ 53#define SPDIFRX_MR_RXEN_MASK GENMASK(0, 0) 54#define SPDIFRX_MR_RXEN_DISABLE (0 << 0) /* SPDIF Receiver Disabled */ 55#define SPDIFRX_MR_RXEN_ENABLE (1 << 0) /* SPDIF Receiver Enabled */ 56 57/* Validity Bit Mode */ 58#define SPDIFRX_MR_VBMODE_MASK GENAMSK(1, 1) 59#define SPDIFRX_MR_VBMODE_ALWAYS_LOAD \ 60 (0 << 1) /* Load sample regardless of validity bit value */ 61#define SPDIFRX_MR_VBMODE_DISCARD_IF_VB1 \ 62 (1 << 1) /* Load sample only if validity bit is 0 */ 63 64/* Data Word Endian Mode */ 65#define SPDIFRX_MR_ENDIAN_MASK GENMASK(2, 2) 66#define SPDIFRX_MR_ENDIAN_LITTLE (0 << 2) /* Little Endian Mode */ 67#define SPDIFRX_MR_ENDIAN_BIG (1 << 2) /* Big Endian Mode */ 68 69/* Parity Bit Mode */ 70#define SPDIFRX_MR_PBMODE_MASK GENMASK(3, 3) 71#define SPDIFRX_MR_PBMODE_PARCHECK (0 << 3) /* Parity Check Enabled */ 72#define SPDIFRX_MR_PBMODE_NOPARCHECK (1 << 3) /* Parity Check Disabled */ 73 74/* Sample Data Width */ 75#define SPDIFRX_MR_DATAWIDTH_MASK GENMASK(5, 4) 76#define SPDIFRX_MR_DATAWIDTH(width) \ 77 (((6 - (width) / 4) << 4) & SPDIFRX_MR_DATAWIDTH_MASK) 78 79/* Packed Data Mode in Receive Holding Register */ 80#define SPDIFRX_MR_PACK_MASK GENMASK(7, 7) 81#define SPDIFRX_MR_PACK_DISABLED (0 << 7) 82#define SPDIFRX_MR_PACK_ENABLED (1 << 7) 83 84/* Start of Block Bit Mode */ 85#define SPDIFRX_MR_SBMODE_MASK GENMASK(8, 8) 86#define SPDIFRX_MR_SBMODE_ALWAYS_LOAD (0 << 8) 87#define SPDIFRX_MR_SBMODE_DISCARD (1 << 8) 88 89/* Consecutive Preamble Error Threshold Automatic Restart */ 90#define SPDIFRX_MR_AUTORST_MASK GENMASK(24, 24) 91#define SPDIFRX_MR_AUTORST_NOACTION (0 << 24) 92#define SPDIFRX_MR_AUTORST_UNLOCK_ON_PRE_ERR (1 << 24) 93 94/* 95 * ---- Interrupt Enable/Disable/Mask/Status Register (Write/Read-only) ---- 96 */ 97#define SPDIFRX_IR_RXRDY BIT(0) 98#define SPDIFRX_IR_LOCKED BIT(1) 99#define SPDIFRX_IR_LOSS BIT(2) 100#define SPDIFRX_IR_BLOCKEND BIT(3) 101#define SPDIFRX_IR_SFE BIT(4) 102#define SPDIFRX_IR_PAR_ERR BIT(5) 103#define SPDIFRX_IR_OVERRUN BIT(6) 104#define SPDIFRX_IR_RXFULL BIT(7) 105#define SPDIFRX_IR_CSC(ch) BIT((ch) + 8) 106#define SPDIFRX_IR_SECE BIT(10) 107#define SPDIFRX_IR_BLOCKST BIT(11) 108#define SPDIFRX_IR_NRZ_ERR BIT(12) 109#define SPDIFRX_IR_PRE_ERR BIT(13) 110#define SPDIFRX_IR_CP_ERR BIT(14) 111 112/* 113 * ---- Receiver Status Register (Read/Write) ---- 114 */ 115/* Enable Status */ 116#define SPDIFRX_RSR_ULOCK BIT(0) 117#define SPDIFRX_RSR_BADF BIT(1) 118#define SPDIFRX_RSR_LOWF BIT(2) 119#define SPDIFRX_RSR_NOSIGNAL BIT(3) 120#define SPDIFRX_RSR_IFS_MASK GENMASK(27, 16) 121#define SPDIFRX_RSR_IFS(reg) \ 122 (((reg) & SPDIFRX_RSR_IFS_MASK) >> 16) 123 124/* 125 * ---- Version Register (Read-only) ---- 126 */ 127#define SPDIFRX_VERSION_MASK GENMASK(11, 0) 128#define SPDIFRX_VERSION_MFN_MASK GENMASK(18, 16) 129#define SPDIFRX_VERSION_MFN(reg) (((reg) & SPDIFRX_VERSION_MFN_MASK) >> 16) 130 131static bool mchp_spdifrx_readable_reg(struct device *dev, unsigned int reg) 132{ 133 switch (reg) { 134 case SPDIFRX_MR: 135 case SPDIFRX_IMR: 136 case SPDIFRX_ISR: 137 case SPDIFRX_RSR: 138 case SPDIFRX_CHSR(0, 0): 139 case SPDIFRX_CHSR(0, 1): 140 case SPDIFRX_CHSR(0, 2): 141 case SPDIFRX_CHSR(0, 3): 142 case SPDIFRX_CHSR(0, 4): 143 case SPDIFRX_CHSR(0, 5): 144 case SPDIFRX_CHUD(0, 0): 145 case SPDIFRX_CHUD(0, 1): 146 case SPDIFRX_CHUD(0, 2): 147 case SPDIFRX_CHUD(0, 3): 148 case SPDIFRX_CHUD(0, 4): 149 case SPDIFRX_CHUD(0, 5): 150 case SPDIFRX_CHSR(1, 0): 151 case SPDIFRX_CHSR(1, 1): 152 case SPDIFRX_CHSR(1, 2): 153 case SPDIFRX_CHSR(1, 3): 154 case SPDIFRX_CHSR(1, 4): 155 case SPDIFRX_CHSR(1, 5): 156 case SPDIFRX_CHUD(1, 0): 157 case SPDIFRX_CHUD(1, 1): 158 case SPDIFRX_CHUD(1, 2): 159 case SPDIFRX_CHUD(1, 3): 160 case SPDIFRX_CHUD(1, 4): 161 case SPDIFRX_CHUD(1, 5): 162 case SPDIFRX_WPMR: 163 case SPDIFRX_WPSR: 164 case SPDIFRX_VERSION: 165 return true; 166 default: 167 return false; 168 } 169} 170 171static bool mchp_spdifrx_writeable_reg(struct device *dev, unsigned int reg) 172{ 173 switch (reg) { 174 case SPDIFRX_CR: 175 case SPDIFRX_MR: 176 case SPDIFRX_IER: 177 case SPDIFRX_IDR: 178 case SPDIFRX_WPMR: 179 return true; 180 default: 181 return false; 182 } 183} 184 185static bool mchp_spdifrx_precious_reg(struct device *dev, unsigned int reg) 186{ 187 switch (reg) { 188 case SPDIFRX_ISR: 189 case SPDIFRX_RHR: 190 return true; 191 default: 192 return false; 193 } 194} 195 196static bool mchp_spdifrx_volatile_reg(struct device *dev, unsigned int reg) 197{ 198 switch (reg) { 199 case SPDIFRX_IMR: 200 case SPDIFRX_ISR: 201 case SPDIFRX_RSR: 202 case SPDIFRX_CHSR(0, 0): 203 case SPDIFRX_CHSR(0, 1): 204 case SPDIFRX_CHSR(0, 2): 205 case SPDIFRX_CHSR(0, 3): 206 case SPDIFRX_CHSR(0, 4): 207 case SPDIFRX_CHSR(0, 5): 208 case SPDIFRX_CHUD(0, 0): 209 case SPDIFRX_CHUD(0, 1): 210 case SPDIFRX_CHUD(0, 2): 211 case SPDIFRX_CHUD(0, 3): 212 case SPDIFRX_CHUD(0, 4): 213 case SPDIFRX_CHUD(0, 5): 214 case SPDIFRX_CHSR(1, 0): 215 case SPDIFRX_CHSR(1, 1): 216 case SPDIFRX_CHSR(1, 2): 217 case SPDIFRX_CHSR(1, 3): 218 case SPDIFRX_CHSR(1, 4): 219 case SPDIFRX_CHSR(1, 5): 220 case SPDIFRX_CHUD(1, 0): 221 case SPDIFRX_CHUD(1, 1): 222 case SPDIFRX_CHUD(1, 2): 223 case SPDIFRX_CHUD(1, 3): 224 case SPDIFRX_CHUD(1, 4): 225 case SPDIFRX_CHUD(1, 5): 226 case SPDIFRX_VERSION: 227 return true; 228 default: 229 return false; 230 } 231} 232 233static const struct regmap_config mchp_spdifrx_regmap_config = { 234 .reg_bits = 32, 235 .reg_stride = 4, 236 .val_bits = 32, 237 .max_register = SPDIFRX_VERSION, 238 .readable_reg = mchp_spdifrx_readable_reg, 239 .writeable_reg = mchp_spdifrx_writeable_reg, 240 .precious_reg = mchp_spdifrx_precious_reg, 241 .volatile_reg = mchp_spdifrx_volatile_reg, 242 .cache_type = REGCACHE_FLAT, 243}; 244 245#define SPDIFRX_GCLK_RATIO_MIN (12 * 64) 246 247#define SPDIFRX_CS_BITS 192 248#define SPDIFRX_UD_BITS 192 249 250#define SPDIFRX_CHANNELS 2 251 252/** 253 * struct mchp_spdifrx_ch_stat: MCHP SPDIFRX channel status 254 * @data: channel status bits 255 * @done: completion to signal channel status bits acquisition done 256 */ 257struct mchp_spdifrx_ch_stat { 258 unsigned char data[SPDIFRX_CS_BITS / 8]; 259 struct completion done; 260}; 261 262/** 263 * struct mchp_spdifrx_user_data: MCHP SPDIFRX user data 264 * @data: user data bits 265 * @done: completion to signal user data bits acquisition done 266 */ 267struct mchp_spdifrx_user_data { 268 unsigned char data[SPDIFRX_UD_BITS / 8]; 269 struct completion done; 270}; 271 272/** 273 * struct mchp_spdifrx_mixer_control: MCHP SPDIFRX mixer control data structure 274 * @ch_stat: array of channel statuses 275 * @user_data: array of user data 276 * @ulock: ulock bit status 277 * @badf: badf bit status 278 * @signal: signal bit status 279 */ 280struct mchp_spdifrx_mixer_control { 281 struct mchp_spdifrx_ch_stat ch_stat[SPDIFRX_CHANNELS]; 282 struct mchp_spdifrx_user_data user_data[SPDIFRX_CHANNELS]; 283 bool ulock; 284 bool badf; 285 bool signal; 286}; 287 288/** 289 * struct mchp_spdifrx_dev: MCHP SPDIFRX device data structure 290 * @capture: DAI DMA configuration data 291 * @control: mixer controls 292 * @mlock: mutex to protect concurency b/w configuration and control APIs 293 * @dev: struct device 294 * @regmap: regmap for this device 295 * @pclk: peripheral clock 296 * @gclk: generic clock 297 * @trigger_enabled: true if enabled though trigger() ops 298 */ 299struct mchp_spdifrx_dev { 300 struct snd_dmaengine_dai_dma_data capture; 301 struct mchp_spdifrx_mixer_control control; 302 struct mutex mlock; 303 struct device *dev; 304 struct regmap *regmap; 305 struct clk *pclk; 306 struct clk *gclk; 307 unsigned int trigger_enabled; 308}; 309 310static void mchp_spdifrx_channel_status_read(struct mchp_spdifrx_dev *dev, 311 int channel) 312{ 313 struct mchp_spdifrx_mixer_control *ctrl = &dev->control; 314 u8 *ch_stat = &ctrl->ch_stat[channel].data[0]; 315 u32 val; 316 int i; 317 318 for (i = 0; i < ARRAY_SIZE(ctrl->ch_stat[channel].data) / 4; i++) { 319 regmap_read(dev->regmap, SPDIFRX_CHSR(channel, i), &val); 320 *ch_stat++ = val & 0xFF; 321 *ch_stat++ = (val >> 8) & 0xFF; 322 *ch_stat++ = (val >> 16) & 0xFF; 323 *ch_stat++ = (val >> 24) & 0xFF; 324 } 325} 326 327static void mchp_spdifrx_channel_user_data_read(struct mchp_spdifrx_dev *dev, 328 int channel) 329{ 330 struct mchp_spdifrx_mixer_control *ctrl = &dev->control; 331 u8 *user_data = &ctrl->user_data[channel].data[0]; 332 u32 val; 333 int i; 334 335 for (i = 0; i < ARRAY_SIZE(ctrl->user_data[channel].data) / 4; i++) { 336 regmap_read(dev->regmap, SPDIFRX_CHUD(channel, i), &val); 337 *user_data++ = val & 0xFF; 338 *user_data++ = (val >> 8) & 0xFF; 339 *user_data++ = (val >> 16) & 0xFF; 340 *user_data++ = (val >> 24) & 0xFF; 341 } 342} 343 344static irqreturn_t mchp_spdif_interrupt(int irq, void *dev_id) 345{ 346 struct mchp_spdifrx_dev *dev = dev_id; 347 struct mchp_spdifrx_mixer_control *ctrl = &dev->control; 348 u32 sr, imr, pending; 349 irqreturn_t ret = IRQ_NONE; 350 int ch; 351 352 regmap_read(dev->regmap, SPDIFRX_ISR, &sr); 353 regmap_read(dev->regmap, SPDIFRX_IMR, &imr); 354 pending = sr & imr; 355 dev_dbg(dev->dev, "ISR: %#x, IMR: %#x, pending: %#x\n", sr, imr, 356 pending); 357 358 if (!pending) 359 return IRQ_NONE; 360 361 if (pending & SPDIFRX_IR_BLOCKEND) { 362 for (ch = 0; ch < SPDIFRX_CHANNELS; ch++) { 363 mchp_spdifrx_channel_user_data_read(dev, ch); 364 complete(&ctrl->user_data[ch].done); 365 } 366 regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_BLOCKEND); 367 ret = IRQ_HANDLED; 368 } 369 370 for (ch = 0; ch < SPDIFRX_CHANNELS; ch++) { 371 if (pending & SPDIFRX_IR_CSC(ch)) { 372 mchp_spdifrx_channel_status_read(dev, ch); 373 complete(&ctrl->ch_stat[ch].done); 374 regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_CSC(ch)); 375 ret = IRQ_HANDLED; 376 } 377 } 378 379 if (pending & SPDIFRX_IR_OVERRUN) { 380 dev_warn(dev->dev, "Overrun detected\n"); 381 ret = IRQ_HANDLED; 382 } 383 384 return ret; 385} 386 387static int mchp_spdifrx_trigger(struct snd_pcm_substream *substream, int cmd, 388 struct snd_soc_dai *dai) 389{ 390 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 391 int ret = 0; 392 393 switch (cmd) { 394 case SNDRV_PCM_TRIGGER_START: 395 case SNDRV_PCM_TRIGGER_RESUME: 396 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 397 mutex_lock(&dev->mlock); 398 /* Enable overrun interrupts */ 399 regmap_write(dev->regmap, SPDIFRX_IER, SPDIFRX_IR_OVERRUN); 400 401 /* Enable receiver. */ 402 regmap_update_bits(dev->regmap, SPDIFRX_MR, SPDIFRX_MR_RXEN_MASK, 403 SPDIFRX_MR_RXEN_ENABLE); 404 dev->trigger_enabled = true; 405 mutex_unlock(&dev->mlock); 406 break; 407 case SNDRV_PCM_TRIGGER_STOP: 408 case SNDRV_PCM_TRIGGER_SUSPEND: 409 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 410 mutex_lock(&dev->mlock); 411 /* Disable overrun interrupts */ 412 regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_OVERRUN); 413 414 /* Disable receiver. */ 415 regmap_update_bits(dev->regmap, SPDIFRX_MR, SPDIFRX_MR_RXEN_MASK, 416 SPDIFRX_MR_RXEN_DISABLE); 417 dev->trigger_enabled = false; 418 mutex_unlock(&dev->mlock); 419 break; 420 default: 421 ret = -EINVAL; 422 } 423 424 return ret; 425} 426 427static int mchp_spdifrx_hw_params(struct snd_pcm_substream *substream, 428 struct snd_pcm_hw_params *params, 429 struct snd_soc_dai *dai) 430{ 431 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 432 u32 mr = 0; 433 int ret; 434 435 dev_dbg(dev->dev, "%s() rate=%u format=%#x width=%u channels=%u\n", 436 __func__, params_rate(params), params_format(params), 437 params_width(params), params_channels(params)); 438 439 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 440 dev_err(dev->dev, "Playback is not supported\n"); 441 return -EINVAL; 442 } 443 444 if (params_channels(params) != SPDIFRX_CHANNELS) { 445 dev_err(dev->dev, "unsupported number of channels: %d\n", 446 params_channels(params)); 447 return -EINVAL; 448 } 449 450 switch (params_format(params)) { 451 case SNDRV_PCM_FORMAT_S16_BE: 452 case SNDRV_PCM_FORMAT_S20_3BE: 453 case SNDRV_PCM_FORMAT_S24_3BE: 454 case SNDRV_PCM_FORMAT_S24_BE: 455 mr |= SPDIFRX_MR_ENDIAN_BIG; 456 fallthrough; 457 case SNDRV_PCM_FORMAT_S16_LE: 458 case SNDRV_PCM_FORMAT_S20_3LE: 459 case SNDRV_PCM_FORMAT_S24_3LE: 460 case SNDRV_PCM_FORMAT_S24_LE: 461 mr |= SPDIFRX_MR_DATAWIDTH(params_width(params)); 462 break; 463 default: 464 dev_err(dev->dev, "unsupported PCM format: %d\n", 465 params_format(params)); 466 return -EINVAL; 467 } 468 469 mutex_lock(&dev->mlock); 470 if (dev->trigger_enabled) { 471 dev_err(dev->dev, "PCM already running\n"); 472 ret = -EBUSY; 473 goto unlock; 474 } 475 476 /* GCLK is enabled by runtime PM. */ 477 clk_disable_unprepare(dev->gclk); 478 479 ret = clk_set_min_rate(dev->gclk, params_rate(params) * 480 SPDIFRX_GCLK_RATIO_MIN + 1); 481 if (ret) { 482 dev_err(dev->dev, 483 "unable to set gclk min rate: rate %u * ratio %u + 1\n", 484 params_rate(params), SPDIFRX_GCLK_RATIO_MIN); 485 /* Restore runtime PM state. */ 486 clk_prepare_enable(dev->gclk); 487 goto unlock; 488 } 489 ret = clk_prepare_enable(dev->gclk); 490 if (ret) { 491 dev_err(dev->dev, "unable to enable gclk: %d\n", ret); 492 goto unlock; 493 } 494 495 dev_dbg(dev->dev, "GCLK range min set to %d\n", 496 params_rate(params) * SPDIFRX_GCLK_RATIO_MIN + 1); 497 498 ret = regmap_write(dev->regmap, SPDIFRX_MR, mr); 499 500unlock: 501 mutex_unlock(&dev->mlock); 502 503 return ret; 504} 505 506#define MCHP_SPDIF_RATES SNDRV_PCM_RATE_8000_192000 507 508#define MCHP_SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ 509 SNDRV_PCM_FMTBIT_U16_BE | \ 510 SNDRV_PCM_FMTBIT_S20_3LE | \ 511 SNDRV_PCM_FMTBIT_S20_3BE | \ 512 SNDRV_PCM_FMTBIT_S24_3LE | \ 513 SNDRV_PCM_FMTBIT_S24_3BE | \ 514 SNDRV_PCM_FMTBIT_S24_LE | \ 515 SNDRV_PCM_FMTBIT_S24_BE \ 516 ) 517 518static int mchp_spdifrx_info(struct snd_kcontrol *kcontrol, 519 struct snd_ctl_elem_info *uinfo) 520{ 521 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 522 uinfo->count = 1; 523 524 return 0; 525} 526 527static int mchp_spdifrx_cs_get(struct mchp_spdifrx_dev *dev, 528 int channel, 529 struct snd_ctl_elem_value *uvalue) 530{ 531 struct mchp_spdifrx_mixer_control *ctrl = &dev->control; 532 struct mchp_spdifrx_ch_stat *ch_stat = &ctrl->ch_stat[channel]; 533 int ret = 0; 534 535 mutex_lock(&dev->mlock); 536 537 ret = pm_runtime_resume_and_get(dev->dev); 538 if (ret < 0) 539 goto unlock; 540 541 /* 542 * We may reach this point with both clocks enabled but the receiver 543 * still disabled. To void waiting for completion and return with 544 * timeout check the dev->trigger_enabled. 545 * 546 * To retrieve data: 547 * - if the receiver is enabled CSC IRQ will update the data in software 548 * caches (ch_stat->data) 549 * - otherwise we just update it here the software caches with latest 550 * available information and return it; in this case we don't need 551 * spin locking as the IRQ is disabled and will not be raised from 552 * anywhere else. 553 */ 554 555 if (dev->trigger_enabled) { 556 reinit_completion(&ch_stat->done); 557 regmap_write(dev->regmap, SPDIFRX_IER, SPDIFRX_IR_CSC(channel)); 558 /* Check for new data available */ 559 ret = wait_for_completion_interruptible_timeout(&ch_stat->done, 560 msecs_to_jiffies(100)); 561 /* Valid stream might not be present */ 562 if (ret <= 0) { 563 dev_dbg(dev->dev, "channel status for channel %d timeout\n", 564 channel); 565 regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_CSC(channel)); 566 ret = ret ? : -ETIMEDOUT; 567 goto pm_runtime_put; 568 } else { 569 ret = 0; 570 } 571 } else { 572 /* Update software cache with latest channel status. */ 573 mchp_spdifrx_channel_status_read(dev, channel); 574 } 575 576 memcpy(uvalue->value.iec958.status, ch_stat->data, 577 sizeof(ch_stat->data)); 578 579pm_runtime_put: 580 pm_runtime_mark_last_busy(dev->dev); 581 pm_runtime_put_autosuspend(dev->dev); 582unlock: 583 mutex_unlock(&dev->mlock); 584 return ret; 585} 586 587static int mchp_spdifrx_cs1_get(struct snd_kcontrol *kcontrol, 588 struct snd_ctl_elem_value *uvalue) 589{ 590 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 591 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 592 593 return mchp_spdifrx_cs_get(dev, 0, uvalue); 594} 595 596static int mchp_spdifrx_cs2_get(struct snd_kcontrol *kcontrol, 597 struct snd_ctl_elem_value *uvalue) 598{ 599 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 600 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 601 602 return mchp_spdifrx_cs_get(dev, 1, uvalue); 603} 604 605static int mchp_spdifrx_cs_mask(struct snd_kcontrol *kcontrol, 606 struct snd_ctl_elem_value *uvalue) 607{ 608 memset(uvalue->value.iec958.status, 0xff, 609 sizeof(uvalue->value.iec958.status)); 610 611 return 0; 612} 613 614static int mchp_spdifrx_subcode_ch_get(struct mchp_spdifrx_dev *dev, 615 int channel, 616 struct snd_ctl_elem_value *uvalue) 617{ 618 struct mchp_spdifrx_mixer_control *ctrl = &dev->control; 619 struct mchp_spdifrx_user_data *user_data = &ctrl->user_data[channel]; 620 int ret = 0; 621 622 mutex_lock(&dev->mlock); 623 624 ret = pm_runtime_resume_and_get(dev->dev); 625 if (ret < 0) 626 goto unlock; 627 628 /* 629 * We may reach this point with both clocks enabled but the receiver 630 * still disabled. To void waiting for completion to just timeout we 631 * check here the dev->trigger_enabled flag. 632 * 633 * To retrieve data: 634 * - if the receiver is enabled we need to wait for blockend IRQ to read 635 * data to and update it for us in software caches 636 * - otherwise reading the SPDIFRX_CHUD() registers is enough. 637 */ 638 639 if (dev->trigger_enabled) { 640 reinit_completion(&user_data->done); 641 regmap_write(dev->regmap, SPDIFRX_IER, SPDIFRX_IR_BLOCKEND); 642 ret = wait_for_completion_interruptible_timeout(&user_data->done, 643 msecs_to_jiffies(100)); 644 /* Valid stream might not be present. */ 645 if (ret <= 0) { 646 dev_dbg(dev->dev, "user data for channel %d timeout\n", 647 channel); 648 regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_BLOCKEND); 649 ret = ret ? : -ETIMEDOUT; 650 goto pm_runtime_put; 651 } else { 652 ret = 0; 653 } 654 } else { 655 /* Update software cache with last available data. */ 656 mchp_spdifrx_channel_user_data_read(dev, channel); 657 } 658 659 memcpy(uvalue->value.iec958.subcode, user_data->data, 660 sizeof(user_data->data)); 661 662pm_runtime_put: 663 pm_runtime_mark_last_busy(dev->dev); 664 pm_runtime_put_autosuspend(dev->dev); 665unlock: 666 mutex_unlock(&dev->mlock); 667 return ret; 668} 669 670static int mchp_spdifrx_subcode_ch1_get(struct snd_kcontrol *kcontrol, 671 struct snd_ctl_elem_value *uvalue) 672{ 673 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 674 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 675 676 return mchp_spdifrx_subcode_ch_get(dev, 0, uvalue); 677} 678 679static int mchp_spdifrx_subcode_ch2_get(struct snd_kcontrol *kcontrol, 680 struct snd_ctl_elem_value *uvalue) 681{ 682 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 683 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 684 685 return mchp_spdifrx_subcode_ch_get(dev, 1, uvalue); 686} 687 688static int mchp_spdifrx_boolean_info(struct snd_kcontrol *kcontrol, 689 struct snd_ctl_elem_info *uinfo) 690{ 691 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; 692 uinfo->count = 1; 693 uinfo->value.integer.min = 0; 694 uinfo->value.integer.max = 1; 695 696 return 0; 697} 698 699static int mchp_spdifrx_ulock_get(struct snd_kcontrol *kcontrol, 700 struct snd_ctl_elem_value *uvalue) 701{ 702 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 703 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 704 struct mchp_spdifrx_mixer_control *ctrl = &dev->control; 705 u32 val; 706 int ret; 707 bool ulock_old = ctrl->ulock; 708 709 mutex_lock(&dev->mlock); 710 711 ret = pm_runtime_resume_and_get(dev->dev); 712 if (ret < 0) 713 goto unlock; 714 715 /* 716 * The RSR.ULOCK has wrong value if both pclk and gclk are enabled 717 * and the receiver is disabled. Thus we take into account the 718 * dev->trigger_enabled here to return a real status. 719 */ 720 if (dev->trigger_enabled) { 721 regmap_read(dev->regmap, SPDIFRX_RSR, &val); 722 ctrl->ulock = !(val & SPDIFRX_RSR_ULOCK); 723 } else { 724 ctrl->ulock = 0; 725 } 726 727 uvalue->value.integer.value[0] = ctrl->ulock; 728 729 pm_runtime_mark_last_busy(dev->dev); 730 pm_runtime_put_autosuspend(dev->dev); 731unlock: 732 mutex_unlock(&dev->mlock); 733 734 return ulock_old != ctrl->ulock; 735} 736 737static int mchp_spdifrx_badf_get(struct snd_kcontrol *kcontrol, 738 struct snd_ctl_elem_value *uvalue) 739{ 740 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 741 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 742 struct mchp_spdifrx_mixer_control *ctrl = &dev->control; 743 u32 val; 744 int ret; 745 bool badf_old = ctrl->badf; 746 747 mutex_lock(&dev->mlock); 748 749 ret = pm_runtime_resume_and_get(dev->dev); 750 if (ret < 0) 751 goto unlock; 752 753 /* 754 * The RSR.ULOCK has wrong value if both pclk and gclk are enabled 755 * and the receiver is disabled. Thus we take into account the 756 * dev->trigger_enabled here to return a real status. 757 */ 758 if (dev->trigger_enabled) { 759 regmap_read(dev->regmap, SPDIFRX_RSR, &val); 760 ctrl->badf = !!(val & SPDIFRX_RSR_BADF); 761 } else { 762 ctrl->badf = 0; 763 } 764 765 pm_runtime_mark_last_busy(dev->dev); 766 pm_runtime_put_autosuspend(dev->dev); 767unlock: 768 mutex_unlock(&dev->mlock); 769 770 uvalue->value.integer.value[0] = ctrl->badf; 771 772 return badf_old != ctrl->badf; 773} 774 775static int mchp_spdifrx_signal_get(struct snd_kcontrol *kcontrol, 776 struct snd_ctl_elem_value *uvalue) 777{ 778 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 779 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 780 struct mchp_spdifrx_mixer_control *ctrl = &dev->control; 781 u32 val = ~0U, loops = 10; 782 int ret; 783 bool signal_old = ctrl->signal; 784 785 mutex_lock(&dev->mlock); 786 787 ret = pm_runtime_resume_and_get(dev->dev); 788 if (ret < 0) 789 goto unlock; 790 791 /* 792 * To get the signal we need to have receiver enabled. This 793 * could be enabled also from trigger() function thus we need to 794 * take care of not disabling the receiver when it runs. 795 */ 796 if (!dev->trigger_enabled) { 797 regmap_update_bits(dev->regmap, SPDIFRX_MR, SPDIFRX_MR_RXEN_MASK, 798 SPDIFRX_MR_RXEN_ENABLE); 799 800 /* Wait for RSR.ULOCK bit. */ 801 while (--loops) { 802 regmap_read(dev->regmap, SPDIFRX_RSR, &val); 803 if (!(val & SPDIFRX_RSR_ULOCK)) 804 break; 805 usleep_range(100, 150); 806 } 807 808 regmap_update_bits(dev->regmap, SPDIFRX_MR, SPDIFRX_MR_RXEN_MASK, 809 SPDIFRX_MR_RXEN_DISABLE); 810 } else { 811 regmap_read(dev->regmap, SPDIFRX_RSR, &val); 812 } 813 814 pm_runtime_mark_last_busy(dev->dev); 815 pm_runtime_put_autosuspend(dev->dev); 816 817unlock: 818 mutex_unlock(&dev->mlock); 819 820 if (!(val & SPDIFRX_RSR_ULOCK)) 821 ctrl->signal = !(val & SPDIFRX_RSR_NOSIGNAL); 822 else 823 ctrl->signal = 0; 824 uvalue->value.integer.value[0] = ctrl->signal; 825 826 return signal_old != ctrl->signal; 827} 828 829static int mchp_spdifrx_rate_info(struct snd_kcontrol *kcontrol, 830 struct snd_ctl_elem_info *uinfo) 831{ 832 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 833 uinfo->count = 1; 834 uinfo->value.integer.min = 0; 835 uinfo->value.integer.max = 192000; 836 837 return 0; 838} 839 840static int mchp_spdifrx_rate_get(struct snd_kcontrol *kcontrol, 841 struct snd_ctl_elem_value *ucontrol) 842{ 843 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); 844 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 845 unsigned long rate; 846 u32 val; 847 int ret; 848 849 mutex_lock(&dev->mlock); 850 851 ret = pm_runtime_resume_and_get(dev->dev); 852 if (ret < 0) 853 goto unlock; 854 855 /* 856 * The RSR.ULOCK has wrong value if both pclk and gclk are enabled 857 * and the receiver is disabled. Thus we take into account the 858 * dev->trigger_enabled here to return a real status. 859 */ 860 if (dev->trigger_enabled) { 861 regmap_read(dev->regmap, SPDIFRX_RSR, &val); 862 /* If the receiver is not locked, ISF data is invalid. */ 863 if (val & SPDIFRX_RSR_ULOCK || !(val & SPDIFRX_RSR_IFS_MASK)) { 864 ucontrol->value.integer.value[0] = 0; 865 goto pm_runtime_put; 866 } 867 } else { 868 /* Reveicer is not locked, IFS data is invalid. */ 869 ucontrol->value.integer.value[0] = 0; 870 goto pm_runtime_put; 871 } 872 873 rate = clk_get_rate(dev->gclk); 874 875 ucontrol->value.integer.value[0] = rate / (32 * SPDIFRX_RSR_IFS(val)); 876 877pm_runtime_put: 878 pm_runtime_mark_last_busy(dev->dev); 879 pm_runtime_put_autosuspend(dev->dev); 880unlock: 881 mutex_unlock(&dev->mlock); 882 return ret; 883} 884 885static struct snd_kcontrol_new mchp_spdifrx_ctrls[] = { 886 /* Channel status controller */ 887 { 888 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 889 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT) 890 " Channel 1", 891 .access = SNDRV_CTL_ELEM_ACCESS_READ | 892 SNDRV_CTL_ELEM_ACCESS_VOLATILE, 893 .info = mchp_spdifrx_info, 894 .get = mchp_spdifrx_cs1_get, 895 }, 896 { 897 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 898 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT) 899 " Channel 2", 900 .access = SNDRV_CTL_ELEM_ACCESS_READ | 901 SNDRV_CTL_ELEM_ACCESS_VOLATILE, 902 .info = mchp_spdifrx_info, 903 .get = mchp_spdifrx_cs2_get, 904 }, 905 { 906 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 907 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, MASK), 908 .access = SNDRV_CTL_ELEM_ACCESS_READ, 909 .info = mchp_spdifrx_info, 910 .get = mchp_spdifrx_cs_mask, 911 }, 912 /* User bits controller */ 913 { 914 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 915 .name = "IEC958 Subcode Capture Default Channel 1", 916 .access = SNDRV_CTL_ELEM_ACCESS_READ | 917 SNDRV_CTL_ELEM_ACCESS_VOLATILE, 918 .info = mchp_spdifrx_info, 919 .get = mchp_spdifrx_subcode_ch1_get, 920 }, 921 { 922 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 923 .name = "IEC958 Subcode Capture Default Channel 2", 924 .access = SNDRV_CTL_ELEM_ACCESS_READ | 925 SNDRV_CTL_ELEM_ACCESS_VOLATILE, 926 .info = mchp_spdifrx_info, 927 .get = mchp_spdifrx_subcode_ch2_get, 928 }, 929 /* Lock status */ 930 { 931 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 932 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE) "Unlocked", 933 .access = SNDRV_CTL_ELEM_ACCESS_READ | 934 SNDRV_CTL_ELEM_ACCESS_VOLATILE, 935 .info = mchp_spdifrx_boolean_info, 936 .get = mchp_spdifrx_ulock_get, 937 }, 938 /* Bad format */ 939 { 940 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 941 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE)"Bad Format", 942 .access = SNDRV_CTL_ELEM_ACCESS_READ | 943 SNDRV_CTL_ELEM_ACCESS_VOLATILE, 944 .info = mchp_spdifrx_boolean_info, 945 .get = mchp_spdifrx_badf_get, 946 }, 947 /* Signal */ 948 { 949 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 950 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE) "Signal", 951 .access = SNDRV_CTL_ELEM_ACCESS_READ | 952 SNDRV_CTL_ELEM_ACCESS_VOLATILE, 953 .info = mchp_spdifrx_boolean_info, 954 .get = mchp_spdifrx_signal_get, 955 }, 956 /* Sampling rate */ 957 { 958 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 959 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, NONE) "Rate", 960 .access = SNDRV_CTL_ELEM_ACCESS_READ | 961 SNDRV_CTL_ELEM_ACCESS_VOLATILE, 962 .info = mchp_spdifrx_rate_info, 963 .get = mchp_spdifrx_rate_get, 964 }, 965}; 966 967static int mchp_spdifrx_dai_probe(struct snd_soc_dai *dai) 968{ 969 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 970 struct mchp_spdifrx_mixer_control *ctrl = &dev->control; 971 int ch; 972 973 snd_soc_dai_init_dma_data(dai, NULL, &dev->capture); 974 975 /* Software reset the IP */ 976 regmap_write(dev->regmap, SPDIFRX_CR, SPDIFRX_CR_SWRST); 977 978 /* Default configuration */ 979 regmap_write(dev->regmap, SPDIFRX_MR, 980 SPDIFRX_MR_VBMODE_DISCARD_IF_VB1 | 981 SPDIFRX_MR_SBMODE_DISCARD | 982 SPDIFRX_MR_AUTORST_NOACTION | 983 SPDIFRX_MR_PACK_DISABLED); 984 985 for (ch = 0; ch < SPDIFRX_CHANNELS; ch++) { 986 init_completion(&ctrl->ch_stat[ch].done); 987 init_completion(&ctrl->user_data[ch].done); 988 } 989 990 /* Add controls */ 991 snd_soc_add_dai_controls(dai, mchp_spdifrx_ctrls, 992 ARRAY_SIZE(mchp_spdifrx_ctrls)); 993 994 return 0; 995} 996 997static int mchp_spdifrx_dai_remove(struct snd_soc_dai *dai) 998{ 999 struct mchp_spdifrx_dev *dev = snd_soc_dai_get_drvdata(dai); 1000 1001 /* Disable interrupts */ 1002 regmap_write(dev->regmap, SPDIFRX_IDR, GENMASK(14, 0)); 1003 1004 return 0; 1005} 1006 1007static const struct snd_soc_dai_ops mchp_spdifrx_dai_ops = { 1008 .probe = mchp_spdifrx_dai_probe, 1009 .remove = mchp_spdifrx_dai_remove, 1010 .trigger = mchp_spdifrx_trigger, 1011 .hw_params = mchp_spdifrx_hw_params, 1012}; 1013 1014static struct snd_soc_dai_driver mchp_spdifrx_dai = { 1015 .name = "mchp-spdifrx", 1016 .capture = { 1017 .stream_name = "S/PDIF Capture", 1018 .channels_min = SPDIFRX_CHANNELS, 1019 .channels_max = SPDIFRX_CHANNELS, 1020 .rates = MCHP_SPDIF_RATES, 1021 .formats = MCHP_SPDIF_FORMATS, 1022 }, 1023 .ops = &mchp_spdifrx_dai_ops, 1024}; 1025 1026static const struct snd_soc_component_driver mchp_spdifrx_component = { 1027 .name = "mchp-spdifrx", 1028 .legacy_dai_naming = 1, 1029}; 1030 1031static const struct of_device_id mchp_spdifrx_dt_ids[] = { 1032 { 1033 .compatible = "microchip,sama7g5-spdifrx", 1034 }, 1035 { /* sentinel */ } 1036}; 1037MODULE_DEVICE_TABLE(of, mchp_spdifrx_dt_ids); 1038 1039static int mchp_spdifrx_runtime_suspend(struct device *dev) 1040{ 1041 struct mchp_spdifrx_dev *spdifrx = dev_get_drvdata(dev); 1042 1043 regcache_cache_only(spdifrx->regmap, true); 1044 clk_disable_unprepare(spdifrx->gclk); 1045 clk_disable_unprepare(spdifrx->pclk); 1046 1047 return 0; 1048} 1049 1050static int mchp_spdifrx_runtime_resume(struct device *dev) 1051{ 1052 struct mchp_spdifrx_dev *spdifrx = dev_get_drvdata(dev); 1053 int ret; 1054 1055 ret = clk_prepare_enable(spdifrx->pclk); 1056 if (ret) 1057 return ret; 1058 1059 ret = clk_prepare_enable(spdifrx->gclk); 1060 if (ret) 1061 goto disable_pclk; 1062 1063 regcache_cache_only(spdifrx->regmap, false); 1064 regcache_mark_dirty(spdifrx->regmap); 1065 ret = regcache_sync(spdifrx->regmap); 1066 if (ret) { 1067 regcache_cache_only(spdifrx->regmap, true); 1068 clk_disable_unprepare(spdifrx->gclk); 1069disable_pclk: 1070 clk_disable_unprepare(spdifrx->pclk); 1071 } 1072 1073 return ret; 1074} 1075 1076static const struct dev_pm_ops mchp_spdifrx_pm_ops = { 1077 RUNTIME_PM_OPS(mchp_spdifrx_runtime_suspend, mchp_spdifrx_runtime_resume, 1078 NULL) 1079}; 1080 1081static int mchp_spdifrx_probe(struct platform_device *pdev) 1082{ 1083 struct mchp_spdifrx_dev *dev; 1084 struct resource *mem; 1085 struct regmap *regmap; 1086 void __iomem *base; 1087 int irq; 1088 int err; 1089 u32 vers; 1090 1091 /* Get memory for driver data. */ 1092 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); 1093 if (!dev) 1094 return -ENOMEM; 1095 1096 /* Map I/O registers. */ 1097 base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem); 1098 if (IS_ERR(base)) 1099 return PTR_ERR(base); 1100 1101 regmap = devm_regmap_init_mmio(&pdev->dev, base, 1102 &mchp_spdifrx_regmap_config); 1103 if (IS_ERR(regmap)) 1104 return PTR_ERR(regmap); 1105 1106 /* Request IRQ. */ 1107 irq = platform_get_irq(pdev, 0); 1108 if (irq < 0) 1109 return irq; 1110 1111 err = devm_request_irq(&pdev->dev, irq, mchp_spdif_interrupt, 0, 1112 dev_name(&pdev->dev), dev); 1113 if (err) 1114 return err; 1115 1116 /* Get the peripheral clock */ 1117 dev->pclk = devm_clk_get(&pdev->dev, "pclk"); 1118 if (IS_ERR(dev->pclk)) { 1119 err = PTR_ERR(dev->pclk); 1120 dev_err(&pdev->dev, "failed to get the peripheral clock: %d\n", 1121 err); 1122 return err; 1123 } 1124 1125 /* Get the generated clock */ 1126 dev->gclk = devm_clk_get(&pdev->dev, "gclk"); 1127 if (IS_ERR(dev->gclk)) { 1128 err = PTR_ERR(dev->gclk); 1129 dev_err(&pdev->dev, 1130 "failed to get the PMC generated clock: %d\n", err); 1131 return err; 1132 } 1133 1134 /* 1135 * Signal control need a valid rate on gclk. hw_params() configures 1136 * it propertly but requesting signal before any hw_params() has been 1137 * called lead to invalid value returned for signal. Thus, configure 1138 * gclk at a valid rate, here, in initialization, to simplify the 1139 * control path. 1140 */ 1141 clk_set_min_rate(dev->gclk, 48000 * SPDIFRX_GCLK_RATIO_MIN + 1); 1142 1143 mutex_init(&dev->mlock); 1144 1145 dev->dev = &pdev->dev; 1146 dev->regmap = regmap; 1147 platform_set_drvdata(pdev, dev); 1148 1149 pm_runtime_enable(dev->dev); 1150 if (!pm_runtime_enabled(dev->dev)) { 1151 err = mchp_spdifrx_runtime_resume(dev->dev); 1152 if (err) 1153 goto pm_runtime_disable; 1154 } 1155 1156 dev->capture.addr = (dma_addr_t)mem->start + SPDIFRX_RHR; 1157 dev->capture.maxburst = 1; 1158 1159 err = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0); 1160 if (err) { 1161 dev_err(&pdev->dev, "failed to register PCM: %d\n", err); 1162 goto pm_runtime_suspend; 1163 } 1164 1165 err = devm_snd_soc_register_component(&pdev->dev, 1166 &mchp_spdifrx_component, 1167 &mchp_spdifrx_dai, 1); 1168 if (err) { 1169 dev_err(&pdev->dev, "fail to register dai\n"); 1170 goto pm_runtime_suspend; 1171 } 1172 1173 regmap_read(regmap, SPDIFRX_VERSION, &vers); 1174 dev_info(&pdev->dev, "hw version: %#lx\n", vers & SPDIFRX_VERSION_MASK); 1175 1176 return 0; 1177 1178pm_runtime_suspend: 1179 if (!pm_runtime_status_suspended(dev->dev)) 1180 mchp_spdifrx_runtime_suspend(dev->dev); 1181pm_runtime_disable: 1182 pm_runtime_disable(dev->dev); 1183 return err; 1184} 1185 1186static void mchp_spdifrx_remove(struct platform_device *pdev) 1187{ 1188 struct mchp_spdifrx_dev *dev = platform_get_drvdata(pdev); 1189 1190 pm_runtime_disable(dev->dev); 1191 if (!pm_runtime_status_suspended(dev->dev)) 1192 mchp_spdifrx_runtime_suspend(dev->dev); 1193} 1194 1195static struct platform_driver mchp_spdifrx_driver = { 1196 .probe = mchp_spdifrx_probe, 1197 .remove_new = mchp_spdifrx_remove, 1198 .driver = { 1199 .name = "mchp_spdifrx", 1200 .of_match_table = mchp_spdifrx_dt_ids, 1201 .pm = pm_ptr(&mchp_spdifrx_pm_ops), 1202 }, 1203}; 1204 1205module_platform_driver(mchp_spdifrx_driver); 1206 1207MODULE_AUTHOR("Codrin Ciubotariu <codrin.ciubotariu@microchip.com>"); 1208MODULE_DESCRIPTION("Microchip S/PDIF RX Controller Driver"); 1209MODULE_LICENSE("GPL v2"); 1210