1 // SPDX-License-Identifier: GPL-2.0-only 2 /* sound/soc/rockchip/rockchip_i2s.c 3 * 4 * ALSA SoC Audio Layer - Rockchip I2S Controller driver 5 * 6 * Copyright (c) 2014 Rockchip Electronics Co. Ltd. 7 * Author: Jianqun <jay.xu@rock-chips.com> 8 */ 9 10 #include <linux/module.h> 11 #include <linux/mfd/syscon.h> 12 #include <linux/delay.h> 13 #include <linux/of_gpio.h> 14 #include <linux/of_device.h> 15 #include <linux/clk.h> 16 #include <linux/pm_runtime.h> 17 #include <linux/regmap.h> 18 #include <sound/pcm_params.h> 19 #include <sound/dmaengine_pcm.h> 20 21 #include "rockchip_i2s.h" 22 #include "rockchip_pcm.h" 23 24 #define DRV_NAME "rockchip-i2s" 25 26 struct rk_i2s_pins { 27 u32 reg_offset; 28 u32 shift; 29 }; 30 31 struct rk_i2s_dev { 32 struct device *dev; 33 34 struct clk *hclk; 35 struct clk *mclk; 36 37 struct snd_dmaengine_dai_dma_data capture_dma_data; 38 struct snd_dmaengine_dai_dma_data playback_dma_data; 39 40 struct regmap *regmap; 41 struct regmap *grf; 42 43 /* 44 * Used to indicate the tx/rx status. 45 * I2S controller hopes to start the tx and rx together, 46 * also to stop them when they are both try to stop. 47 */ 48 bool tx_start; 49 bool rx_start; 50 bool is_master_mode; 51 const struct rk_i2s_pins *pins; 52 }; 53 54 static int i2s_runtime_suspend(struct device *dev) 55 { 56 struct rk_i2s_dev *i2s = dev_get_drvdata(dev); 57 58 regcache_cache_only(i2s->regmap, true); 59 clk_disable_unprepare(i2s->mclk); 60 61 return 0; 62 } 63 64 static int i2s_runtime_resume(struct device *dev) 65 { 66 struct rk_i2s_dev *i2s = dev_get_drvdata(dev); 67 int ret; 68 69 ret = clk_prepare_enable(i2s->mclk); 70 if (ret) { 71 dev_err(i2s->dev, "clock enable failed %d\n", ret); 72 return ret; 73 } 74 75 regcache_cache_only(i2s->regmap, false); 76 regcache_mark_dirty(i2s->regmap); 77 78 ret = regcache_sync(i2s->regmap); 79 if (ret) 80 clk_disable_unprepare(i2s->mclk); 81 82 return ret; 83 } 84 85 static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai) 86 { 87 return snd_soc_dai_get_drvdata(dai); 88 } 89 90 static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on) 91 { 92 unsigned int val = 0; 93 int retry = 10; 94 95 if (on) { 96 regmap_update_bits(i2s->regmap, I2S_DMACR, 97 I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE); 98 99 regmap_update_bits(i2s->regmap, I2S_XFER, 100 I2S_XFER_TXS_START | I2S_XFER_RXS_START, 101 I2S_XFER_TXS_START | I2S_XFER_RXS_START); 102 103 i2s->tx_start = true; 104 } else { 105 i2s->tx_start = false; 106 107 regmap_update_bits(i2s->regmap, I2S_DMACR, 108 I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_DISABLE); 109 110 if (!i2s->rx_start) { 111 regmap_update_bits(i2s->regmap, I2S_XFER, 112 I2S_XFER_TXS_START | 113 I2S_XFER_RXS_START, 114 I2S_XFER_TXS_STOP | 115 I2S_XFER_RXS_STOP); 116 117 udelay(150); 118 regmap_update_bits(i2s->regmap, I2S_CLR, 119 I2S_CLR_TXC | I2S_CLR_RXC, 120 I2S_CLR_TXC | I2S_CLR_RXC); 121 122 regmap_read(i2s->regmap, I2S_CLR, &val); 123 124 /* Should wait for clear operation to finish */ 125 while (val) { 126 regmap_read(i2s->regmap, I2S_CLR, &val); 127 retry--; 128 if (!retry) { 129 dev_warn(i2s->dev, "fail to clear\n"); 130 break; 131 } 132 } 133 } 134 } 135 } 136 137 static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on) 138 { 139 unsigned int val = 0; 140 int retry = 10; 141 142 if (on) { 143 regmap_update_bits(i2s->regmap, I2S_DMACR, 144 I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_ENABLE); 145 146 regmap_update_bits(i2s->regmap, I2S_XFER, 147 I2S_XFER_TXS_START | I2S_XFER_RXS_START, 148 I2S_XFER_TXS_START | I2S_XFER_RXS_START); 149 150 i2s->rx_start = true; 151 } else { 152 i2s->rx_start = false; 153 154 regmap_update_bits(i2s->regmap, I2S_DMACR, 155 I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_DISABLE); 156 157 if (!i2s->tx_start) { 158 regmap_update_bits(i2s->regmap, I2S_XFER, 159 I2S_XFER_TXS_START | 160 I2S_XFER_RXS_START, 161 I2S_XFER_TXS_STOP | 162 I2S_XFER_RXS_STOP); 163 164 udelay(150); 165 regmap_update_bits(i2s->regmap, I2S_CLR, 166 I2S_CLR_TXC | I2S_CLR_RXC, 167 I2S_CLR_TXC | I2S_CLR_RXC); 168 169 regmap_read(i2s->regmap, I2S_CLR, &val); 170 171 /* Should wait for clear operation to finish */ 172 while (val) { 173 regmap_read(i2s->regmap, I2S_CLR, &val); 174 retry--; 175 if (!retry) { 176 dev_warn(i2s->dev, "fail to clear\n"); 177 break; 178 } 179 } 180 } 181 } 182 } 183 184 static int rockchip_i2s_set_fmt(struct snd_soc_dai *cpu_dai, 185 unsigned int fmt) 186 { 187 struct rk_i2s_dev *i2s = to_info(cpu_dai); 188 unsigned int mask = 0, val = 0; 189 190 mask = I2S_CKR_MSS_MASK; 191 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 192 case SND_SOC_DAIFMT_CBS_CFS: 193 /* Set source clock in Master mode */ 194 val = I2S_CKR_MSS_MASTER; 195 i2s->is_master_mode = true; 196 break; 197 case SND_SOC_DAIFMT_CBM_CFM: 198 val = I2S_CKR_MSS_SLAVE; 199 i2s->is_master_mode = false; 200 break; 201 default: 202 return -EINVAL; 203 } 204 205 regmap_update_bits(i2s->regmap, I2S_CKR, mask, val); 206 207 mask = I2S_CKR_CKP_MASK; 208 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 209 case SND_SOC_DAIFMT_NB_NF: 210 val = I2S_CKR_CKP_NEG; 211 break; 212 case SND_SOC_DAIFMT_IB_NF: 213 val = I2S_CKR_CKP_POS; 214 break; 215 default: 216 return -EINVAL; 217 } 218 219 regmap_update_bits(i2s->regmap, I2S_CKR, mask, val); 220 221 mask = I2S_TXCR_IBM_MASK | I2S_TXCR_TFS_MASK | I2S_TXCR_PBM_MASK; 222 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 223 case SND_SOC_DAIFMT_RIGHT_J: 224 val = I2S_TXCR_IBM_RSJM; 225 break; 226 case SND_SOC_DAIFMT_LEFT_J: 227 val = I2S_TXCR_IBM_LSJM; 228 break; 229 case SND_SOC_DAIFMT_I2S: 230 val = I2S_TXCR_IBM_NORMAL; 231 break; 232 case SND_SOC_DAIFMT_DSP_A: /* PCM no delay mode */ 233 val = I2S_TXCR_TFS_PCM; 234 break; 235 case SND_SOC_DAIFMT_DSP_B: /* PCM delay 1 mode */ 236 val = I2S_TXCR_TFS_PCM | I2S_TXCR_PBM_MODE(1); 237 break; 238 default: 239 return -EINVAL; 240 } 241 242 regmap_update_bits(i2s->regmap, I2S_TXCR, mask, val); 243 244 mask = I2S_RXCR_IBM_MASK | I2S_RXCR_TFS_MASK | I2S_RXCR_PBM_MASK; 245 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 246 case SND_SOC_DAIFMT_RIGHT_J: 247 val = I2S_RXCR_IBM_RSJM; 248 break; 249 case SND_SOC_DAIFMT_LEFT_J: 250 val = I2S_RXCR_IBM_LSJM; 251 break; 252 case SND_SOC_DAIFMT_I2S: 253 val = I2S_RXCR_IBM_NORMAL; 254 break; 255 case SND_SOC_DAIFMT_DSP_A: /* PCM no delay mode */ 256 val = I2S_RXCR_TFS_PCM; 257 break; 258 case SND_SOC_DAIFMT_DSP_B: /* PCM delay 1 mode */ 259 val = I2S_RXCR_TFS_PCM | I2S_RXCR_PBM_MODE(1); 260 break; 261 default: 262 return -EINVAL; 263 } 264 265 regmap_update_bits(i2s->regmap, I2S_RXCR, mask, val); 266 267 return 0; 268 } 269 270 static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream, 271 struct snd_pcm_hw_params *params, 272 struct snd_soc_dai *dai) 273 { 274 struct rk_i2s_dev *i2s = to_info(dai); 275 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 276 unsigned int val = 0; 277 unsigned int mclk_rate, bclk_rate, div_bclk, div_lrck; 278 279 if (i2s->is_master_mode) { 280 mclk_rate = clk_get_rate(i2s->mclk); 281 bclk_rate = 2 * 32 * params_rate(params); 282 if (bclk_rate == 0 || mclk_rate % bclk_rate) 283 return -EINVAL; 284 285 div_bclk = mclk_rate / bclk_rate; 286 div_lrck = bclk_rate / params_rate(params); 287 regmap_update_bits(i2s->regmap, I2S_CKR, 288 I2S_CKR_MDIV_MASK, 289 I2S_CKR_MDIV(div_bclk)); 290 291 regmap_update_bits(i2s->regmap, I2S_CKR, 292 I2S_CKR_TSD_MASK | 293 I2S_CKR_RSD_MASK, 294 I2S_CKR_TSD(div_lrck) | 295 I2S_CKR_RSD(div_lrck)); 296 } 297 298 switch (params_format(params)) { 299 case SNDRV_PCM_FORMAT_S8: 300 val |= I2S_TXCR_VDW(8); 301 break; 302 case SNDRV_PCM_FORMAT_S16_LE: 303 val |= I2S_TXCR_VDW(16); 304 break; 305 case SNDRV_PCM_FORMAT_S20_3LE: 306 val |= I2S_TXCR_VDW(20); 307 break; 308 case SNDRV_PCM_FORMAT_S24_LE: 309 val |= I2S_TXCR_VDW(24); 310 break; 311 case SNDRV_PCM_FORMAT_S32_LE: 312 val |= I2S_TXCR_VDW(32); 313 break; 314 default: 315 return -EINVAL; 316 } 317 318 switch (params_channels(params)) { 319 case 8: 320 val |= I2S_CHN_8; 321 break; 322 case 6: 323 val |= I2S_CHN_6; 324 break; 325 case 4: 326 val |= I2S_CHN_4; 327 break; 328 case 2: 329 val |= I2S_CHN_2; 330 break; 331 default: 332 dev_err(i2s->dev, "invalid channel: %d\n", 333 params_channels(params)); 334 return -EINVAL; 335 } 336 337 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 338 regmap_update_bits(i2s->regmap, I2S_RXCR, 339 I2S_RXCR_VDW_MASK | I2S_RXCR_CSR_MASK, 340 val); 341 else 342 regmap_update_bits(i2s->regmap, I2S_TXCR, 343 I2S_TXCR_VDW_MASK | I2S_TXCR_CSR_MASK, 344 val); 345 346 if (!IS_ERR(i2s->grf) && i2s->pins) { 347 regmap_read(i2s->regmap, I2S_TXCR, &val); 348 val &= I2S_TXCR_CSR_MASK; 349 350 switch (val) { 351 case I2S_CHN_4: 352 val = I2S_IO_4CH_OUT_6CH_IN; 353 break; 354 case I2S_CHN_6: 355 val = I2S_IO_6CH_OUT_4CH_IN; 356 break; 357 case I2S_CHN_8: 358 val = I2S_IO_8CH_OUT_2CH_IN; 359 break; 360 default: 361 val = I2S_IO_2CH_OUT_8CH_IN; 362 break; 363 } 364 365 val <<= i2s->pins->shift; 366 val |= (I2S_IO_DIRECTION_MASK << i2s->pins->shift) << 16; 367 regmap_write(i2s->grf, i2s->pins->reg_offset, val); 368 } 369 370 regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDL_MASK, 371 I2S_DMACR_TDL(16)); 372 regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDL_MASK, 373 I2S_DMACR_RDL(16)); 374 375 val = I2S_CKR_TRCM_TXRX; 376 if (dai->driver->symmetric_rate && rtd->dai_link->symmetric_rate) 377 val = I2S_CKR_TRCM_TXONLY; 378 379 regmap_update_bits(i2s->regmap, I2S_CKR, 380 I2S_CKR_TRCM_MASK, 381 val); 382 return 0; 383 } 384 385 static int rockchip_i2s_trigger(struct snd_pcm_substream *substream, 386 int cmd, struct snd_soc_dai *dai) 387 { 388 struct rk_i2s_dev *i2s = to_info(dai); 389 int ret = 0; 390 391 switch (cmd) { 392 case SNDRV_PCM_TRIGGER_START: 393 case SNDRV_PCM_TRIGGER_RESUME: 394 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 395 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 396 rockchip_snd_rxctrl(i2s, 1); 397 else 398 rockchip_snd_txctrl(i2s, 1); 399 break; 400 case SNDRV_PCM_TRIGGER_SUSPEND: 401 case SNDRV_PCM_TRIGGER_STOP: 402 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 403 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 404 rockchip_snd_rxctrl(i2s, 0); 405 else 406 rockchip_snd_txctrl(i2s, 0); 407 break; 408 default: 409 ret = -EINVAL; 410 break; 411 } 412 413 return ret; 414 } 415 416 static int rockchip_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id, 417 unsigned int freq, int dir) 418 { 419 struct rk_i2s_dev *i2s = to_info(cpu_dai); 420 int ret; 421 422 if (freq == 0) 423 return 0; 424 425 ret = clk_set_rate(i2s->mclk, freq); 426 if (ret) 427 dev_err(i2s->dev, "Fail to set mclk %d\n", ret); 428 429 return ret; 430 } 431 432 static int rockchip_i2s_dai_probe(struct snd_soc_dai *dai) 433 { 434 struct rk_i2s_dev *i2s = snd_soc_dai_get_drvdata(dai); 435 436 dai->capture_dma_data = &i2s->capture_dma_data; 437 dai->playback_dma_data = &i2s->playback_dma_data; 438 439 return 0; 440 } 441 442 static const struct snd_soc_dai_ops rockchip_i2s_dai_ops = { 443 .hw_params = rockchip_i2s_hw_params, 444 .set_sysclk = rockchip_i2s_set_sysclk, 445 .set_fmt = rockchip_i2s_set_fmt, 446 .trigger = rockchip_i2s_trigger, 447 }; 448 449 static struct snd_soc_dai_driver rockchip_i2s_dai = { 450 .probe = rockchip_i2s_dai_probe, 451 .playback = { 452 .stream_name = "Playback", 453 .channels_min = 2, 454 .channels_max = 8, 455 .rates = SNDRV_PCM_RATE_8000_192000, 456 .formats = (SNDRV_PCM_FMTBIT_S8 | 457 SNDRV_PCM_FMTBIT_S16_LE | 458 SNDRV_PCM_FMTBIT_S20_3LE | 459 SNDRV_PCM_FMTBIT_S24_LE | 460 SNDRV_PCM_FMTBIT_S32_LE), 461 }, 462 .capture = { 463 .stream_name = "Capture", 464 .channels_min = 2, 465 .channels_max = 2, 466 .rates = SNDRV_PCM_RATE_8000_192000, 467 .formats = (SNDRV_PCM_FMTBIT_S8 | 468 SNDRV_PCM_FMTBIT_S16_LE | 469 SNDRV_PCM_FMTBIT_S20_3LE | 470 SNDRV_PCM_FMTBIT_S24_LE | 471 SNDRV_PCM_FMTBIT_S32_LE), 472 }, 473 .ops = &rockchip_i2s_dai_ops, 474 .symmetric_rate = 1, 475 }; 476 477 static const struct snd_soc_component_driver rockchip_i2s_component = { 478 .name = DRV_NAME, 479 }; 480 481 static bool rockchip_i2s_wr_reg(struct device *dev, unsigned int reg) 482 { 483 switch (reg) { 484 case I2S_TXCR: 485 case I2S_RXCR: 486 case I2S_CKR: 487 case I2S_DMACR: 488 case I2S_INTCR: 489 case I2S_XFER: 490 case I2S_CLR: 491 case I2S_TXDR: 492 return true; 493 default: 494 return false; 495 } 496 } 497 498 static bool rockchip_i2s_rd_reg(struct device *dev, unsigned int reg) 499 { 500 switch (reg) { 501 case I2S_TXCR: 502 case I2S_RXCR: 503 case I2S_CKR: 504 case I2S_DMACR: 505 case I2S_INTCR: 506 case I2S_XFER: 507 case I2S_CLR: 508 case I2S_TXDR: 509 case I2S_RXDR: 510 case I2S_FIFOLR: 511 case I2S_INTSR: 512 return true; 513 default: 514 return false; 515 } 516 } 517 518 static bool rockchip_i2s_volatile_reg(struct device *dev, unsigned int reg) 519 { 520 switch (reg) { 521 case I2S_INTSR: 522 case I2S_CLR: 523 case I2S_FIFOLR: 524 case I2S_TXDR: 525 case I2S_RXDR: 526 return true; 527 default: 528 return false; 529 } 530 } 531 532 static bool rockchip_i2s_precious_reg(struct device *dev, unsigned int reg) 533 { 534 switch (reg) { 535 case I2S_RXDR: 536 return true; 537 default: 538 return false; 539 } 540 } 541 542 static const struct reg_default rockchip_i2s_reg_defaults[] = { 543 {0x00, 0x0000000f}, 544 {0x04, 0x0000000f}, 545 {0x08, 0x00071f1f}, 546 {0x10, 0x001f0000}, 547 {0x14, 0x01f00000}, 548 }; 549 550 static const struct regmap_config rockchip_i2s_regmap_config = { 551 .reg_bits = 32, 552 .reg_stride = 4, 553 .val_bits = 32, 554 .max_register = I2S_RXDR, 555 .reg_defaults = rockchip_i2s_reg_defaults, 556 .num_reg_defaults = ARRAY_SIZE(rockchip_i2s_reg_defaults), 557 .writeable_reg = rockchip_i2s_wr_reg, 558 .readable_reg = rockchip_i2s_rd_reg, 559 .volatile_reg = rockchip_i2s_volatile_reg, 560 .precious_reg = rockchip_i2s_precious_reg, 561 .cache_type = REGCACHE_FLAT, 562 }; 563 564 static const struct rk_i2s_pins rk3399_i2s_pins = { 565 .reg_offset = 0xe220, 566 .shift = 11, 567 }; 568 569 static const struct of_device_id rockchip_i2s_match[] __maybe_unused = { 570 { .compatible = "rockchip,rk3066-i2s", }, 571 { .compatible = "rockchip,rk3188-i2s", }, 572 { .compatible = "rockchip,rk3288-i2s", }, 573 { .compatible = "rockchip,rk3399-i2s", .data = &rk3399_i2s_pins }, 574 {}, 575 }; 576 577 static int rockchip_i2s_probe(struct platform_device *pdev) 578 { 579 struct device_node *node = pdev->dev.of_node; 580 const struct of_device_id *of_id; 581 struct rk_i2s_dev *i2s; 582 struct snd_soc_dai_driver *soc_dai; 583 struct resource *res; 584 void __iomem *regs; 585 int ret; 586 int val; 587 588 i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL); 589 if (!i2s) 590 return -ENOMEM; 591 592 i2s->dev = &pdev->dev; 593 594 i2s->grf = syscon_regmap_lookup_by_phandle(node, "rockchip,grf"); 595 if (!IS_ERR(i2s->grf)) { 596 of_id = of_match_device(rockchip_i2s_match, &pdev->dev); 597 if (!of_id || !of_id->data) 598 return -EINVAL; 599 600 i2s->pins = of_id->data; 601 } 602 603 /* try to prepare related clocks */ 604 i2s->hclk = devm_clk_get(&pdev->dev, "i2s_hclk"); 605 if (IS_ERR(i2s->hclk)) { 606 dev_err(&pdev->dev, "Can't retrieve i2s bus clock\n"); 607 return PTR_ERR(i2s->hclk); 608 } 609 ret = clk_prepare_enable(i2s->hclk); 610 if (ret) { 611 dev_err(i2s->dev, "hclock enable failed %d\n", ret); 612 return ret; 613 } 614 615 i2s->mclk = devm_clk_get(&pdev->dev, "i2s_clk"); 616 if (IS_ERR(i2s->mclk)) { 617 dev_err(&pdev->dev, "Can't retrieve i2s master clock\n"); 618 return PTR_ERR(i2s->mclk); 619 } 620 621 regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 622 if (IS_ERR(regs)) 623 return PTR_ERR(regs); 624 625 i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs, 626 &rockchip_i2s_regmap_config); 627 if (IS_ERR(i2s->regmap)) { 628 dev_err(&pdev->dev, 629 "Failed to initialise managed register map\n"); 630 return PTR_ERR(i2s->regmap); 631 } 632 633 i2s->playback_dma_data.addr = res->start + I2S_TXDR; 634 i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 635 i2s->playback_dma_data.maxburst = 4; 636 637 i2s->capture_dma_data.addr = res->start + I2S_RXDR; 638 i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 639 i2s->capture_dma_data.maxburst = 4; 640 641 dev_set_drvdata(&pdev->dev, i2s); 642 643 pm_runtime_enable(&pdev->dev); 644 if (!pm_runtime_enabled(&pdev->dev)) { 645 ret = i2s_runtime_resume(&pdev->dev); 646 if (ret) 647 goto err_pm_disable; 648 } 649 650 soc_dai = devm_kmemdup(&pdev->dev, &rockchip_i2s_dai, 651 sizeof(*soc_dai), GFP_KERNEL); 652 if (!soc_dai) { 653 ret = -ENOMEM; 654 goto err_pm_disable; 655 } 656 657 if (!of_property_read_u32(node, "rockchip,playback-channels", &val)) { 658 if (val >= 2 && val <= 8) 659 soc_dai->playback.channels_max = val; 660 } 661 662 if (!of_property_read_u32(node, "rockchip,capture-channels", &val)) { 663 if (val >= 2 && val <= 8) 664 soc_dai->capture.channels_max = val; 665 } 666 667 ret = devm_snd_soc_register_component(&pdev->dev, 668 &rockchip_i2s_component, 669 soc_dai, 1); 670 671 if (ret) { 672 dev_err(&pdev->dev, "Could not register DAI\n"); 673 goto err_suspend; 674 } 675 676 ret = rockchip_pcm_platform_register(&pdev->dev); 677 if (ret) { 678 dev_err(&pdev->dev, "Could not register PCM\n"); 679 goto err_suspend; 680 } 681 682 return 0; 683 684 err_suspend: 685 if (!pm_runtime_status_suspended(&pdev->dev)) 686 i2s_runtime_suspend(&pdev->dev); 687 err_pm_disable: 688 pm_runtime_disable(&pdev->dev); 689 690 return ret; 691 } 692 693 static int rockchip_i2s_remove(struct platform_device *pdev) 694 { 695 struct rk_i2s_dev *i2s = dev_get_drvdata(&pdev->dev); 696 697 pm_runtime_disable(&pdev->dev); 698 if (!pm_runtime_status_suspended(&pdev->dev)) 699 i2s_runtime_suspend(&pdev->dev); 700 701 clk_disable_unprepare(i2s->hclk); 702 703 return 0; 704 } 705 706 static const struct dev_pm_ops rockchip_i2s_pm_ops = { 707 SET_RUNTIME_PM_OPS(i2s_runtime_suspend, i2s_runtime_resume, 708 NULL) 709 }; 710 711 static struct platform_driver rockchip_i2s_driver = { 712 .probe = rockchip_i2s_probe, 713 .remove = rockchip_i2s_remove, 714 .driver = { 715 .name = DRV_NAME, 716 .of_match_table = of_match_ptr(rockchip_i2s_match), 717 .pm = &rockchip_i2s_pm_ops, 718 }, 719 }; 720 module_platform_driver(rockchip_i2s_driver); 721 722 MODULE_DESCRIPTION("ROCKCHIP IIS ASoC Interface"); 723 MODULE_AUTHOR("jianqun <jay.xu@rock-chips.com>"); 724 MODULE_LICENSE("GPL v2"); 725 MODULE_ALIAS("platform:" DRV_NAME); 726 MODULE_DEVICE_TABLE(of, rockchip_i2s_match); 727