1 // SPDX-License-Identifier: GPL-2.0-only 2 // ALSA SoC Audio Layer - Rockchip I2S/TDM Controller driver 3 4 // Copyright (c) 2018 Rockchip Electronics Co. Ltd. 5 // Author: Sugar Zhang <sugar.zhang@rock-chips.com> 6 // Author: Nicolas Frattaroli <frattaroli.nicolas@gmail.com> 7 8 #include <linux/clk.h> 9 #include <linux/clk-provider.h> 10 #include <linux/delay.h> 11 #include <linux/mfd/syscon.h> 12 #include <linux/module.h> 13 #include <linux/of.h> 14 #include <linux/pm_runtime.h> 15 #include <linux/regmap.h> 16 #include <linux/reset.h> 17 #include <linux/spinlock.h> 18 #include <sound/dmaengine_pcm.h> 19 #include <sound/pcm_params.h> 20 21 #include "rockchip_i2s_tdm.h" 22 23 #define DRV_NAME "rockchip-i2s-tdm" 24 25 #define DEFAULT_MCLK_FS 256 26 #define CH_GRP_MAX 4 /* The max channel 8 / 2 */ 27 #define MULTIPLEX_CH_MAX 10 28 29 #define TRCM_TXRX 0 30 #define TRCM_TX 1 31 #define TRCM_RX 2 32 33 struct txrx_config { 34 u32 addr; 35 u32 reg; 36 u32 txonly; 37 u32 rxonly; 38 }; 39 40 struct rk_i2s_soc_data { 41 u32 softrst_offset; 42 u32 grf_reg_offset; 43 u32 grf_shift; 44 int config_count; 45 const struct txrx_config *configs; 46 int (*init)(struct device *dev, u32 addr); 47 }; 48 49 struct rk_i2s_tdm_dev { 50 struct device *dev; 51 struct clk *hclk; 52 struct clk *mclk_tx; 53 struct clk *mclk_rx; 54 struct regmap *regmap; 55 struct regmap *grf; 56 struct snd_dmaengine_dai_dma_data capture_dma_data; 57 struct snd_dmaengine_dai_dma_data playback_dma_data; 58 struct reset_control *tx_reset; 59 struct reset_control *rx_reset; 60 const struct rk_i2s_soc_data *soc_data; 61 bool is_master_mode; 62 bool io_multiplex; 63 bool tdm_mode; 64 unsigned int frame_width; 65 unsigned int clk_trcm; 66 unsigned int i2s_sdis[CH_GRP_MAX]; 67 unsigned int i2s_sdos[CH_GRP_MAX]; 68 int refcount; 69 spinlock_t lock; /* xfer lock */ 70 bool has_playback; 71 bool has_capture; 72 struct snd_soc_dai_driver *dai; 73 }; 74 75 static int to_ch_num(unsigned int val) 76 { 77 switch (val) { 78 case I2S_CHN_4: 79 return 4; 80 case I2S_CHN_6: 81 return 6; 82 case I2S_CHN_8: 83 return 8; 84 default: 85 return 2; 86 } 87 } 88 89 static void i2s_tdm_disable_unprepare_mclk(struct rk_i2s_tdm_dev *i2s_tdm) 90 { 91 clk_disable_unprepare(i2s_tdm->mclk_tx); 92 clk_disable_unprepare(i2s_tdm->mclk_rx); 93 } 94 95 /** 96 * i2s_tdm_prepare_enable_mclk - prepare to enable all mclks, disable them on 97 * failure. 98 * @i2s_tdm: rk_i2s_tdm_dev struct 99 * 100 * This function attempts to enable all mclk clocks, but cleans up after 101 * itself on failure. Guarantees to balance its calls. 102 * 103 * Returns success (0) or negative errno. 104 */ 105 static int i2s_tdm_prepare_enable_mclk(struct rk_i2s_tdm_dev *i2s_tdm) 106 { 107 int ret = 0; 108 109 ret = clk_prepare_enable(i2s_tdm->mclk_tx); 110 if (ret) 111 goto err_mclk_tx; 112 ret = clk_prepare_enable(i2s_tdm->mclk_rx); 113 if (ret) 114 goto err_mclk_rx; 115 116 return 0; 117 118 err_mclk_rx: 119 clk_disable_unprepare(i2s_tdm->mclk_tx); 120 err_mclk_tx: 121 return ret; 122 } 123 124 static int __maybe_unused i2s_tdm_runtime_suspend(struct device *dev) 125 { 126 struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev); 127 128 regcache_cache_only(i2s_tdm->regmap, true); 129 i2s_tdm_disable_unprepare_mclk(i2s_tdm); 130 131 clk_disable_unprepare(i2s_tdm->hclk); 132 133 return 0; 134 } 135 136 static int __maybe_unused i2s_tdm_runtime_resume(struct device *dev) 137 { 138 struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev); 139 int ret; 140 141 ret = clk_prepare_enable(i2s_tdm->hclk); 142 if (ret) 143 goto err_hclk; 144 145 ret = i2s_tdm_prepare_enable_mclk(i2s_tdm); 146 if (ret) 147 goto err_mclk; 148 149 regcache_cache_only(i2s_tdm->regmap, false); 150 regcache_mark_dirty(i2s_tdm->regmap); 151 152 ret = regcache_sync(i2s_tdm->regmap); 153 if (ret) 154 goto err_regcache; 155 156 return 0; 157 158 err_regcache: 159 i2s_tdm_disable_unprepare_mclk(i2s_tdm); 160 err_mclk: 161 clk_disable_unprepare(i2s_tdm->hclk); 162 err_hclk: 163 return ret; 164 } 165 166 static inline struct rk_i2s_tdm_dev *to_info(struct snd_soc_dai *dai) 167 { 168 return snd_soc_dai_get_drvdata(dai); 169 } 170 171 /* 172 * Makes sure that both tx and rx are reset at the same time to sync lrck 173 * when clk_trcm > 0. 174 */ 175 static void rockchip_snd_xfer_sync_reset(struct rk_i2s_tdm_dev *i2s_tdm) 176 { 177 /* This is technically race-y. 178 * 179 * In an ideal world, we could atomically assert both resets at the 180 * same time, through an atomic bulk reset API. This API however does 181 * not exist, so what the downstream vendor code used to do was 182 * implement half a reset controller here and require the CRU to be 183 * passed to the driver as a device tree node. Violating abstractions 184 * like that is bad, especially when it influences something like the 185 * bindings which are supposed to describe the hardware, not whatever 186 * workarounds the driver needs, so it was dropped. 187 * 188 * In practice, asserting the resets one by one appears to work just 189 * fine for playback. During duplex (playback + capture) operation, 190 * this might become an issue, but that should be solved by the 191 * implementation of the aforementioned API, not by shoving a reset 192 * controller into an audio driver. 193 */ 194 195 reset_control_assert(i2s_tdm->tx_reset); 196 reset_control_assert(i2s_tdm->rx_reset); 197 udelay(10); 198 reset_control_deassert(i2s_tdm->tx_reset); 199 reset_control_deassert(i2s_tdm->rx_reset); 200 udelay(10); 201 } 202 203 static void rockchip_snd_reset(struct reset_control *rc) 204 { 205 reset_control_assert(rc); 206 udelay(10); 207 reset_control_deassert(rc); 208 udelay(10); 209 } 210 211 static void rockchip_snd_xfer_clear(struct rk_i2s_tdm_dev *i2s_tdm, 212 unsigned int clr) 213 { 214 unsigned int xfer_mask = 0; 215 unsigned int xfer_val = 0; 216 unsigned int val; 217 int retry = 10; 218 bool tx = clr & I2S_CLR_TXC; 219 bool rx = clr & I2S_CLR_RXC; 220 221 if (!(rx || tx)) 222 return; 223 224 if (tx) { 225 xfer_mask = I2S_XFER_TXS_START; 226 xfer_val = I2S_XFER_TXS_STOP; 227 } 228 if (rx) { 229 xfer_mask |= I2S_XFER_RXS_START; 230 xfer_val |= I2S_XFER_RXS_STOP; 231 } 232 233 regmap_update_bits(i2s_tdm->regmap, I2S_XFER, xfer_mask, xfer_val); 234 udelay(150); 235 regmap_update_bits(i2s_tdm->regmap, I2S_CLR, clr, clr); 236 237 regmap_read(i2s_tdm->regmap, I2S_CLR, &val); 238 /* Wait on the clear operation to finish */ 239 while (val) { 240 udelay(15); 241 regmap_read(i2s_tdm->regmap, I2S_CLR, &val); 242 retry--; 243 if (!retry) { 244 dev_warn(i2s_tdm->dev, "clear failed, reset %s%s\n", 245 tx ? "tx" : "", rx ? "rx" : ""); 246 if (rx && tx) 247 rockchip_snd_xfer_sync_reset(i2s_tdm); 248 else if (tx) 249 rockchip_snd_reset(i2s_tdm->tx_reset); 250 else if (rx) 251 rockchip_snd_reset(i2s_tdm->rx_reset); 252 break; 253 } 254 } 255 } 256 257 static inline void rockchip_enable_tde(struct regmap *regmap) 258 { 259 regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE, 260 I2S_DMACR_TDE_ENABLE); 261 } 262 263 static inline void rockchip_disable_tde(struct regmap *regmap) 264 { 265 regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE, 266 I2S_DMACR_TDE_DISABLE); 267 } 268 269 static inline void rockchip_enable_rde(struct regmap *regmap) 270 { 271 regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_RDE_ENABLE, 272 I2S_DMACR_RDE_ENABLE); 273 } 274 275 static inline void rockchip_disable_rde(struct regmap *regmap) 276 { 277 regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_RDE_ENABLE, 278 I2S_DMACR_RDE_DISABLE); 279 } 280 281 /* only used when clk_trcm > 0 */ 282 static void rockchip_snd_txrxctrl(struct snd_pcm_substream *substream, 283 struct snd_soc_dai *dai, int on) 284 { 285 struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai); 286 unsigned long flags; 287 288 spin_lock_irqsave(&i2s_tdm->lock, flags); 289 if (on) { 290 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 291 rockchip_enable_tde(i2s_tdm->regmap); 292 else 293 rockchip_enable_rde(i2s_tdm->regmap); 294 295 if (++i2s_tdm->refcount == 1) { 296 rockchip_snd_xfer_sync_reset(i2s_tdm); 297 regmap_update_bits(i2s_tdm->regmap, I2S_XFER, 298 I2S_XFER_TXS_START | 299 I2S_XFER_RXS_START, 300 I2S_XFER_TXS_START | 301 I2S_XFER_RXS_START); 302 } 303 } else { 304 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 305 rockchip_disable_tde(i2s_tdm->regmap); 306 else 307 rockchip_disable_rde(i2s_tdm->regmap); 308 309 if (--i2s_tdm->refcount == 0) { 310 rockchip_snd_xfer_clear(i2s_tdm, 311 I2S_CLR_TXC | I2S_CLR_RXC); 312 } 313 } 314 spin_unlock_irqrestore(&i2s_tdm->lock, flags); 315 } 316 317 static void rockchip_snd_txctrl(struct rk_i2s_tdm_dev *i2s_tdm, int on) 318 { 319 if (on) { 320 rockchip_enable_tde(i2s_tdm->regmap); 321 322 regmap_update_bits(i2s_tdm->regmap, I2S_XFER, 323 I2S_XFER_TXS_START, 324 I2S_XFER_TXS_START); 325 } else { 326 rockchip_disable_tde(i2s_tdm->regmap); 327 328 rockchip_snd_xfer_clear(i2s_tdm, I2S_CLR_TXC); 329 } 330 } 331 332 static void rockchip_snd_rxctrl(struct rk_i2s_tdm_dev *i2s_tdm, int on) 333 { 334 if (on) { 335 rockchip_enable_rde(i2s_tdm->regmap); 336 337 regmap_update_bits(i2s_tdm->regmap, I2S_XFER, 338 I2S_XFER_RXS_START, 339 I2S_XFER_RXS_START); 340 } else { 341 rockchip_disable_rde(i2s_tdm->regmap); 342 343 rockchip_snd_xfer_clear(i2s_tdm, I2S_CLR_RXC); 344 } 345 } 346 347 static int rockchip_i2s_tdm_set_fmt(struct snd_soc_dai *cpu_dai, 348 unsigned int fmt) 349 { 350 struct rk_i2s_tdm_dev *i2s_tdm = to_info(cpu_dai); 351 unsigned int mask, val, tdm_val, txcr_val, rxcr_val; 352 int ret; 353 bool is_tdm = i2s_tdm->tdm_mode; 354 355 ret = pm_runtime_resume_and_get(cpu_dai->dev); 356 if (ret < 0 && ret != -EACCES) 357 return ret; 358 359 mask = I2S_CKR_MSS_MASK; 360 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 361 case SND_SOC_DAIFMT_BP_FP: 362 val = I2S_CKR_MSS_MASTER; 363 i2s_tdm->is_master_mode = true; 364 break; 365 case SND_SOC_DAIFMT_BC_FC: 366 val = I2S_CKR_MSS_SLAVE; 367 i2s_tdm->is_master_mode = false; 368 break; 369 default: 370 ret = -EINVAL; 371 goto err_pm_put; 372 } 373 374 regmap_update_bits(i2s_tdm->regmap, I2S_CKR, mask, val); 375 376 mask = I2S_CKR_CKP_MASK | I2S_CKR_TLP_MASK | I2S_CKR_RLP_MASK; 377 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 378 case SND_SOC_DAIFMT_NB_NF: 379 val = I2S_CKR_CKP_NORMAL | 380 I2S_CKR_TLP_NORMAL | 381 I2S_CKR_RLP_NORMAL; 382 break; 383 case SND_SOC_DAIFMT_NB_IF: 384 val = I2S_CKR_CKP_NORMAL | 385 I2S_CKR_TLP_INVERTED | 386 I2S_CKR_RLP_INVERTED; 387 break; 388 case SND_SOC_DAIFMT_IB_NF: 389 val = I2S_CKR_CKP_INVERTED | 390 I2S_CKR_TLP_NORMAL | 391 I2S_CKR_RLP_NORMAL; 392 break; 393 case SND_SOC_DAIFMT_IB_IF: 394 val = I2S_CKR_CKP_INVERTED | 395 I2S_CKR_TLP_INVERTED | 396 I2S_CKR_RLP_INVERTED; 397 break; 398 default: 399 ret = -EINVAL; 400 goto err_pm_put; 401 } 402 403 regmap_update_bits(i2s_tdm->regmap, I2S_CKR, mask, val); 404 405 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 406 case SND_SOC_DAIFMT_RIGHT_J: 407 txcr_val = I2S_TXCR_IBM_RSJM; 408 rxcr_val = I2S_RXCR_IBM_RSJM; 409 break; 410 case SND_SOC_DAIFMT_LEFT_J: 411 txcr_val = I2S_TXCR_IBM_LSJM; 412 rxcr_val = I2S_RXCR_IBM_LSJM; 413 break; 414 case SND_SOC_DAIFMT_I2S: 415 txcr_val = I2S_TXCR_IBM_NORMAL; 416 rxcr_val = I2S_RXCR_IBM_NORMAL; 417 break; 418 case SND_SOC_DAIFMT_DSP_A: /* PCM delay 1 mode */ 419 txcr_val = I2S_TXCR_TFS_PCM | I2S_TXCR_PBM_MODE(1); 420 rxcr_val = I2S_RXCR_TFS_PCM | I2S_RXCR_PBM_MODE(1); 421 break; 422 case SND_SOC_DAIFMT_DSP_B: /* PCM no delay mode */ 423 txcr_val = I2S_TXCR_TFS_PCM; 424 rxcr_val = I2S_RXCR_TFS_PCM; 425 break; 426 default: 427 ret = -EINVAL; 428 goto err_pm_put; 429 } 430 431 mask = I2S_TXCR_IBM_MASK | I2S_TXCR_TFS_MASK | I2S_TXCR_PBM_MASK; 432 regmap_update_bits(i2s_tdm->regmap, I2S_TXCR, mask, txcr_val); 433 434 mask = I2S_RXCR_IBM_MASK | I2S_RXCR_TFS_MASK | I2S_RXCR_PBM_MASK; 435 regmap_update_bits(i2s_tdm->regmap, I2S_RXCR, mask, rxcr_val); 436 437 if (is_tdm) { 438 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 439 case SND_SOC_DAIFMT_RIGHT_J: 440 val = I2S_TXCR_TFS_TDM_I2S; 441 tdm_val = TDM_SHIFT_CTRL(2); 442 break; 443 case SND_SOC_DAIFMT_LEFT_J: 444 val = I2S_TXCR_TFS_TDM_I2S; 445 tdm_val = TDM_SHIFT_CTRL(1); 446 break; 447 case SND_SOC_DAIFMT_I2S: 448 val = I2S_TXCR_TFS_TDM_I2S; 449 tdm_val = TDM_SHIFT_CTRL(0); 450 break; 451 case SND_SOC_DAIFMT_DSP_A: 452 val = I2S_TXCR_TFS_TDM_PCM; 453 tdm_val = TDM_SHIFT_CTRL(0); 454 break; 455 case SND_SOC_DAIFMT_DSP_B: 456 val = I2S_TXCR_TFS_TDM_PCM; 457 tdm_val = TDM_SHIFT_CTRL(2); 458 break; 459 default: 460 ret = -EINVAL; 461 goto err_pm_put; 462 } 463 464 tdm_val |= TDM_FSYNC_WIDTH_SEL1(1); 465 tdm_val |= TDM_FSYNC_WIDTH_HALF_FRAME; 466 467 mask = I2S_TXCR_TFS_MASK; 468 regmap_update_bits(i2s_tdm->regmap, I2S_TXCR, mask, val); 469 regmap_update_bits(i2s_tdm->regmap, I2S_RXCR, mask, val); 470 471 mask = TDM_FSYNC_WIDTH_SEL1_MSK | TDM_FSYNC_WIDTH_SEL0_MSK | 472 TDM_SHIFT_CTRL_MSK; 473 regmap_update_bits(i2s_tdm->regmap, I2S_TDM_TXCR, 474 mask, tdm_val); 475 regmap_update_bits(i2s_tdm->regmap, I2S_TDM_RXCR, 476 mask, tdm_val); 477 } 478 479 err_pm_put: 480 pm_runtime_put(cpu_dai->dev); 481 482 return ret; 483 } 484 485 static void rockchip_i2s_tdm_xfer_pause(struct snd_pcm_substream *substream, 486 struct rk_i2s_tdm_dev *i2s_tdm) 487 { 488 int stream; 489 490 stream = SNDRV_PCM_STREAM_LAST - substream->stream; 491 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 492 rockchip_disable_tde(i2s_tdm->regmap); 493 else 494 rockchip_disable_rde(i2s_tdm->regmap); 495 496 rockchip_snd_xfer_clear(i2s_tdm, I2S_CLR_TXC | I2S_CLR_RXC); 497 } 498 499 static void rockchip_i2s_tdm_xfer_resume(struct snd_pcm_substream *substream, 500 struct rk_i2s_tdm_dev *i2s_tdm) 501 { 502 int stream; 503 504 stream = SNDRV_PCM_STREAM_LAST - substream->stream; 505 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 506 rockchip_enable_tde(i2s_tdm->regmap); 507 else 508 rockchip_enable_rde(i2s_tdm->regmap); 509 510 regmap_update_bits(i2s_tdm->regmap, I2S_XFER, 511 I2S_XFER_TXS_START | 512 I2S_XFER_RXS_START, 513 I2S_XFER_TXS_START | 514 I2S_XFER_RXS_START); 515 } 516 517 static int rockchip_i2s_ch_to_io(unsigned int ch, bool substream_capture) 518 { 519 if (substream_capture) { 520 switch (ch) { 521 case I2S_CHN_4: 522 return I2S_IO_6CH_OUT_4CH_IN; 523 case I2S_CHN_6: 524 return I2S_IO_4CH_OUT_6CH_IN; 525 case I2S_CHN_8: 526 return I2S_IO_2CH_OUT_8CH_IN; 527 default: 528 return I2S_IO_8CH_OUT_2CH_IN; 529 } 530 } else { 531 switch (ch) { 532 case I2S_CHN_4: 533 return I2S_IO_4CH_OUT_6CH_IN; 534 case I2S_CHN_6: 535 return I2S_IO_6CH_OUT_4CH_IN; 536 case I2S_CHN_8: 537 return I2S_IO_8CH_OUT_2CH_IN; 538 default: 539 return I2S_IO_2CH_OUT_8CH_IN; 540 } 541 } 542 } 543 544 static int rockchip_i2s_io_multiplex(struct snd_pcm_substream *substream, 545 struct snd_soc_dai *dai) 546 { 547 struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai); 548 int usable_chs = MULTIPLEX_CH_MAX; 549 unsigned int val = 0; 550 551 if (!i2s_tdm->io_multiplex) 552 return 0; 553 554 if (IS_ERR_OR_NULL(i2s_tdm->grf)) { 555 dev_err(i2s_tdm->dev, 556 "io multiplex not supported for this device\n"); 557 return -EINVAL; 558 } 559 560 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 561 struct snd_pcm_str *playback_str = 562 &substream->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]; 563 564 if (playback_str->substream_opened) { 565 regmap_read(i2s_tdm->regmap, I2S_TXCR, &val); 566 val &= I2S_TXCR_CSR_MASK; 567 usable_chs = MULTIPLEX_CH_MAX - to_ch_num(val); 568 } 569 570 regmap_read(i2s_tdm->regmap, I2S_RXCR, &val); 571 val &= I2S_RXCR_CSR_MASK; 572 573 if (to_ch_num(val) > usable_chs) { 574 dev_err(i2s_tdm->dev, 575 "Capture channels (%d) > usable channels (%d)\n", 576 to_ch_num(val), usable_chs); 577 return -EINVAL; 578 } 579 580 rockchip_i2s_ch_to_io(val, true); 581 } else { 582 struct snd_pcm_str *capture_str = 583 &substream->pcm->streams[SNDRV_PCM_STREAM_CAPTURE]; 584 585 if (capture_str->substream_opened) { 586 regmap_read(i2s_tdm->regmap, I2S_RXCR, &val); 587 val &= I2S_RXCR_CSR_MASK; 588 usable_chs = MULTIPLEX_CH_MAX - to_ch_num(val); 589 } 590 591 regmap_read(i2s_tdm->regmap, I2S_TXCR, &val); 592 val &= I2S_TXCR_CSR_MASK; 593 594 if (to_ch_num(val) > usable_chs) { 595 dev_err(i2s_tdm->dev, 596 "Playback channels (%d) > usable channels (%d)\n", 597 to_ch_num(val), usable_chs); 598 return -EINVAL; 599 } 600 } 601 602 val <<= i2s_tdm->soc_data->grf_shift; 603 val |= (I2S_IO_DIRECTION_MASK << i2s_tdm->soc_data->grf_shift) << 16; 604 regmap_write(i2s_tdm->grf, i2s_tdm->soc_data->grf_reg_offset, val); 605 606 return 0; 607 } 608 609 static int rockchip_i2s_trcm_mode(struct snd_pcm_substream *substream, 610 struct snd_soc_dai *dai, 611 unsigned int div_bclk, 612 unsigned int div_lrck, 613 unsigned int fmt) 614 { 615 struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai); 616 unsigned long flags; 617 618 if (!i2s_tdm->clk_trcm) 619 return 0; 620 621 spin_lock_irqsave(&i2s_tdm->lock, flags); 622 if (i2s_tdm->refcount) 623 rockchip_i2s_tdm_xfer_pause(substream, i2s_tdm); 624 625 regmap_update_bits(i2s_tdm->regmap, I2S_CLKDIV, 626 I2S_CLKDIV_TXM_MASK | I2S_CLKDIV_RXM_MASK, 627 I2S_CLKDIV_TXM(div_bclk) | I2S_CLKDIV_RXM(div_bclk)); 628 regmap_update_bits(i2s_tdm->regmap, I2S_CKR, 629 I2S_CKR_TSD_MASK | I2S_CKR_RSD_MASK, 630 I2S_CKR_TSD(div_lrck) | I2S_CKR_RSD(div_lrck)); 631 632 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 633 regmap_update_bits(i2s_tdm->regmap, I2S_TXCR, 634 I2S_TXCR_VDW_MASK | I2S_TXCR_CSR_MASK, 635 fmt); 636 else 637 regmap_update_bits(i2s_tdm->regmap, I2S_RXCR, 638 I2S_RXCR_VDW_MASK | I2S_RXCR_CSR_MASK, 639 fmt); 640 641 if (i2s_tdm->refcount) 642 rockchip_i2s_tdm_xfer_resume(substream, i2s_tdm); 643 spin_unlock_irqrestore(&i2s_tdm->lock, flags); 644 645 return 0; 646 } 647 648 static int rockchip_i2s_tdm_hw_params(struct snd_pcm_substream *substream, 649 struct snd_pcm_hw_params *params, 650 struct snd_soc_dai *dai) 651 { 652 struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai); 653 unsigned int val = 0; 654 unsigned int mclk_rate, bclk_rate, div_bclk = 4, div_lrck = 64; 655 int err; 656 657 if (i2s_tdm->is_master_mode) { 658 struct clk *mclk; 659 660 if (i2s_tdm->clk_trcm == TRCM_TX) { 661 mclk = i2s_tdm->mclk_tx; 662 } else if (i2s_tdm->clk_trcm == TRCM_RX) { 663 mclk = i2s_tdm->mclk_rx; 664 } else if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 665 mclk = i2s_tdm->mclk_tx; 666 } else { 667 mclk = i2s_tdm->mclk_rx; 668 } 669 670 err = clk_set_rate(mclk, DEFAULT_MCLK_FS * params_rate(params)); 671 if (err) 672 return err; 673 674 mclk_rate = clk_get_rate(mclk); 675 bclk_rate = i2s_tdm->frame_width * params_rate(params); 676 if (!bclk_rate) 677 return -EINVAL; 678 679 div_bclk = DIV_ROUND_CLOSEST(mclk_rate, bclk_rate); 680 div_lrck = bclk_rate / params_rate(params); 681 } 682 683 switch (params_format(params)) { 684 case SNDRV_PCM_FORMAT_S8: 685 val |= I2S_TXCR_VDW(8); 686 break; 687 case SNDRV_PCM_FORMAT_S16_LE: 688 val |= I2S_TXCR_VDW(16); 689 break; 690 case SNDRV_PCM_FORMAT_S20_3LE: 691 val |= I2S_TXCR_VDW(20); 692 break; 693 case SNDRV_PCM_FORMAT_S24_LE: 694 val |= I2S_TXCR_VDW(24); 695 break; 696 case SNDRV_PCM_FORMAT_S32_LE: 697 val |= I2S_TXCR_VDW(32); 698 break; 699 default: 700 return -EINVAL; 701 } 702 703 switch (params_channels(params)) { 704 case 8: 705 val |= I2S_CHN_8; 706 break; 707 case 6: 708 val |= I2S_CHN_6; 709 break; 710 case 4: 711 val |= I2S_CHN_4; 712 break; 713 case 2: 714 val |= I2S_CHN_2; 715 break; 716 default: 717 return -EINVAL; 718 } 719 720 if (i2s_tdm->clk_trcm) { 721 rockchip_i2s_trcm_mode(substream, dai, div_bclk, div_lrck, val); 722 } else if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 723 regmap_update_bits(i2s_tdm->regmap, I2S_CLKDIV, 724 I2S_CLKDIV_TXM_MASK, 725 I2S_CLKDIV_TXM(div_bclk)); 726 regmap_update_bits(i2s_tdm->regmap, I2S_CKR, 727 I2S_CKR_TSD_MASK, 728 I2S_CKR_TSD(div_lrck)); 729 regmap_update_bits(i2s_tdm->regmap, I2S_TXCR, 730 I2S_TXCR_VDW_MASK | I2S_TXCR_CSR_MASK, 731 val); 732 } else { 733 regmap_update_bits(i2s_tdm->regmap, I2S_CLKDIV, 734 I2S_CLKDIV_RXM_MASK, 735 I2S_CLKDIV_RXM(div_bclk)); 736 regmap_update_bits(i2s_tdm->regmap, I2S_CKR, 737 I2S_CKR_RSD_MASK, 738 I2S_CKR_RSD(div_lrck)); 739 regmap_update_bits(i2s_tdm->regmap, I2S_RXCR, 740 I2S_RXCR_VDW_MASK | I2S_RXCR_CSR_MASK, 741 val); 742 } 743 744 return rockchip_i2s_io_multiplex(substream, dai); 745 } 746 747 static int rockchip_i2s_tdm_trigger(struct snd_pcm_substream *substream, 748 int cmd, struct snd_soc_dai *dai) 749 { 750 struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai); 751 752 switch (cmd) { 753 case SNDRV_PCM_TRIGGER_START: 754 case SNDRV_PCM_TRIGGER_RESUME: 755 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 756 if (i2s_tdm->clk_trcm) 757 rockchip_snd_txrxctrl(substream, dai, 1); 758 else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 759 rockchip_snd_rxctrl(i2s_tdm, 1); 760 else 761 rockchip_snd_txctrl(i2s_tdm, 1); 762 break; 763 case SNDRV_PCM_TRIGGER_SUSPEND: 764 case SNDRV_PCM_TRIGGER_STOP: 765 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 766 if (i2s_tdm->clk_trcm) 767 rockchip_snd_txrxctrl(substream, dai, 0); 768 else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 769 rockchip_snd_rxctrl(i2s_tdm, 0); 770 else 771 rockchip_snd_txctrl(i2s_tdm, 0); 772 break; 773 default: 774 return -EINVAL; 775 } 776 777 return 0; 778 } 779 780 static int rockchip_i2s_tdm_dai_probe(struct snd_soc_dai *dai) 781 { 782 struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_dai_get_drvdata(dai); 783 784 if (i2s_tdm->has_capture) 785 snd_soc_dai_dma_data_set_capture(dai, &i2s_tdm->capture_dma_data); 786 if (i2s_tdm->has_playback) 787 snd_soc_dai_dma_data_set_playback(dai, &i2s_tdm->playback_dma_data); 788 789 return 0; 790 } 791 792 static int rockchip_dai_tdm_slot(struct snd_soc_dai *dai, 793 unsigned int tx_mask, unsigned int rx_mask, 794 int slots, int slot_width) 795 { 796 struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_dai_get_drvdata(dai); 797 unsigned int mask, val; 798 799 i2s_tdm->tdm_mode = true; 800 i2s_tdm->frame_width = slots * slot_width; 801 mask = TDM_SLOT_BIT_WIDTH_MSK | TDM_FRAME_WIDTH_MSK; 802 val = TDM_SLOT_BIT_WIDTH(slot_width) | 803 TDM_FRAME_WIDTH(slots * slot_width); 804 regmap_update_bits(i2s_tdm->regmap, I2S_TDM_TXCR, 805 mask, val); 806 regmap_update_bits(i2s_tdm->regmap, I2S_TDM_RXCR, 807 mask, val); 808 809 return 0; 810 } 811 812 static int rockchip_i2s_tdm_set_bclk_ratio(struct snd_soc_dai *dai, 813 unsigned int ratio) 814 { 815 struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_dai_get_drvdata(dai); 816 817 if (ratio < 32 || ratio > 512 || ratio % 2 == 1) 818 return -EINVAL; 819 820 i2s_tdm->frame_width = ratio; 821 822 return 0; 823 } 824 825 static const struct snd_soc_dai_ops rockchip_i2s_tdm_dai_ops = { 826 .probe = rockchip_i2s_tdm_dai_probe, 827 .hw_params = rockchip_i2s_tdm_hw_params, 828 .set_bclk_ratio = rockchip_i2s_tdm_set_bclk_ratio, 829 .set_fmt = rockchip_i2s_tdm_set_fmt, 830 .set_tdm_slot = rockchip_dai_tdm_slot, 831 .trigger = rockchip_i2s_tdm_trigger, 832 }; 833 834 static const struct snd_soc_component_driver rockchip_i2s_tdm_component = { 835 .name = DRV_NAME, 836 .legacy_dai_naming = 1, 837 }; 838 839 static bool rockchip_i2s_tdm_wr_reg(struct device *dev, unsigned int reg) 840 { 841 switch (reg) { 842 case I2S_TXCR: 843 case I2S_RXCR: 844 case I2S_CKR: 845 case I2S_DMACR: 846 case I2S_INTCR: 847 case I2S_XFER: 848 case I2S_CLR: 849 case I2S_TXDR: 850 case I2S_TDM_TXCR: 851 case I2S_TDM_RXCR: 852 case I2S_CLKDIV: 853 return true; 854 default: 855 return false; 856 } 857 } 858 859 static bool rockchip_i2s_tdm_rd_reg(struct device *dev, unsigned int reg) 860 { 861 switch (reg) { 862 case I2S_TXCR: 863 case I2S_RXCR: 864 case I2S_CKR: 865 case I2S_DMACR: 866 case I2S_INTCR: 867 case I2S_XFER: 868 case I2S_CLR: 869 case I2S_TXDR: 870 case I2S_RXDR: 871 case I2S_TXFIFOLR: 872 case I2S_INTSR: 873 case I2S_RXFIFOLR: 874 case I2S_TDM_TXCR: 875 case I2S_TDM_RXCR: 876 case I2S_CLKDIV: 877 return true; 878 default: 879 return false; 880 } 881 } 882 883 static bool rockchip_i2s_tdm_volatile_reg(struct device *dev, unsigned int reg) 884 { 885 switch (reg) { 886 case I2S_TXFIFOLR: 887 case I2S_INTSR: 888 case I2S_CLR: 889 case I2S_TXDR: 890 case I2S_RXDR: 891 case I2S_RXFIFOLR: 892 return true; 893 default: 894 return false; 895 } 896 } 897 898 static bool rockchip_i2s_tdm_precious_reg(struct device *dev, unsigned int reg) 899 { 900 if (reg == I2S_RXDR) 901 return true; 902 return false; 903 } 904 905 static const struct reg_default rockchip_i2s_tdm_reg_defaults[] = { 906 {0x00, 0x7200000f}, 907 {0x04, 0x01c8000f}, 908 {0x08, 0x00001f1f}, 909 {0x10, 0x001f0000}, 910 {0x14, 0x01f00000}, 911 {0x30, 0x00003eff}, 912 {0x34, 0x00003eff}, 913 {0x38, 0x00000707}, 914 }; 915 916 static const struct regmap_config rockchip_i2s_tdm_regmap_config = { 917 .reg_bits = 32, 918 .reg_stride = 4, 919 .val_bits = 32, 920 .max_register = I2S_CLKDIV, 921 .reg_defaults = rockchip_i2s_tdm_reg_defaults, 922 .num_reg_defaults = ARRAY_SIZE(rockchip_i2s_tdm_reg_defaults), 923 .writeable_reg = rockchip_i2s_tdm_wr_reg, 924 .readable_reg = rockchip_i2s_tdm_rd_reg, 925 .volatile_reg = rockchip_i2s_tdm_volatile_reg, 926 .precious_reg = rockchip_i2s_tdm_precious_reg, 927 .cache_type = REGCACHE_FLAT, 928 }; 929 930 static int common_soc_init(struct device *dev, u32 addr) 931 { 932 struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev); 933 const struct txrx_config *configs = i2s_tdm->soc_data->configs; 934 u32 reg = 0, val = 0, trcm = i2s_tdm->clk_trcm; 935 int i; 936 937 if (trcm == TRCM_TXRX) 938 return 0; 939 940 if (IS_ERR_OR_NULL(i2s_tdm->grf)) { 941 dev_err(i2s_tdm->dev, 942 "no grf present but non-txrx TRCM specified\n"); 943 return -EINVAL; 944 } 945 946 for (i = 0; i < i2s_tdm->soc_data->config_count; i++) { 947 if (addr != configs[i].addr) 948 continue; 949 reg = configs[i].reg; 950 if (trcm == TRCM_TX) 951 val = configs[i].txonly; 952 else 953 val = configs[i].rxonly; 954 955 if (reg) 956 regmap_write(i2s_tdm->grf, reg, val); 957 } 958 959 return 0; 960 } 961 962 static const struct txrx_config px30_txrx_config[] = { 963 { 0xff060000, 0x184, PX30_I2S0_CLK_TXONLY, PX30_I2S0_CLK_RXONLY }, 964 }; 965 966 static const struct txrx_config rk1808_txrx_config[] = { 967 { 0xff7e0000, 0x190, RK1808_I2S0_CLK_TXONLY, RK1808_I2S0_CLK_RXONLY }, 968 }; 969 970 static const struct txrx_config rk3308_txrx_config[] = { 971 { 0xff300000, 0x308, RK3308_I2S0_CLK_TXONLY, RK3308_I2S0_CLK_RXONLY }, 972 { 0xff310000, 0x308, RK3308_I2S1_CLK_TXONLY, RK3308_I2S1_CLK_RXONLY }, 973 }; 974 975 static const struct txrx_config rk3568_txrx_config[] = { 976 { 0xfe410000, 0x504, RK3568_I2S1_CLK_TXONLY, RK3568_I2S1_CLK_RXONLY }, 977 { 0xfe410000, 0x508, RK3568_I2S1_MCLK_TX_OE, RK3568_I2S1_MCLK_RX_OE }, 978 { 0xfe420000, 0x508, RK3568_I2S2_MCLK_OE, RK3568_I2S2_MCLK_OE }, 979 { 0xfe430000, 0x504, RK3568_I2S3_CLK_TXONLY, RK3568_I2S3_CLK_RXONLY }, 980 { 0xfe430000, 0x508, RK3568_I2S3_MCLK_TXONLY, RK3568_I2S3_MCLK_RXONLY }, 981 { 0xfe430000, 0x508, RK3568_I2S3_MCLK_OE, RK3568_I2S3_MCLK_OE }, 982 }; 983 984 static const struct txrx_config rv1126_txrx_config[] = { 985 { 0xff800000, 0x10260, RV1126_I2S0_CLK_TXONLY, RV1126_I2S0_CLK_RXONLY }, 986 }; 987 988 static const struct rk_i2s_soc_data px30_i2s_soc_data = { 989 .softrst_offset = 0x0300, 990 .configs = px30_txrx_config, 991 .config_count = ARRAY_SIZE(px30_txrx_config), 992 .init = common_soc_init, 993 }; 994 995 static const struct rk_i2s_soc_data rk1808_i2s_soc_data = { 996 .softrst_offset = 0x0300, 997 .configs = rk1808_txrx_config, 998 .config_count = ARRAY_SIZE(rk1808_txrx_config), 999 .init = common_soc_init, 1000 }; 1001 1002 static const struct rk_i2s_soc_data rk3308_i2s_soc_data = { 1003 .softrst_offset = 0x0400, 1004 .grf_reg_offset = 0x0308, 1005 .grf_shift = 5, 1006 .configs = rk3308_txrx_config, 1007 .config_count = ARRAY_SIZE(rk3308_txrx_config), 1008 .init = common_soc_init, 1009 }; 1010 1011 static const struct rk_i2s_soc_data rk3568_i2s_soc_data = { 1012 .softrst_offset = 0x0400, 1013 .configs = rk3568_txrx_config, 1014 .config_count = ARRAY_SIZE(rk3568_txrx_config), 1015 .init = common_soc_init, 1016 }; 1017 1018 static const struct rk_i2s_soc_data rv1126_i2s_soc_data = { 1019 .softrst_offset = 0x0300, 1020 .configs = rv1126_txrx_config, 1021 .config_count = ARRAY_SIZE(rv1126_txrx_config), 1022 .init = common_soc_init, 1023 }; 1024 1025 static const struct of_device_id rockchip_i2s_tdm_match[] = { 1026 { .compatible = "rockchip,px30-i2s-tdm", .data = &px30_i2s_soc_data }, 1027 { .compatible = "rockchip,rk1808-i2s-tdm", .data = &rk1808_i2s_soc_data }, 1028 { .compatible = "rockchip,rk3308-i2s-tdm", .data = &rk3308_i2s_soc_data }, 1029 { .compatible = "rockchip,rk3568-i2s-tdm", .data = &rk3568_i2s_soc_data }, 1030 { .compatible = "rockchip,rk3588-i2s-tdm" }, 1031 { .compatible = "rockchip,rv1126-i2s-tdm", .data = &rv1126_i2s_soc_data }, 1032 {}, 1033 }; 1034 1035 static const struct snd_soc_dai_driver i2s_tdm_dai = { 1036 .ops = &rockchip_i2s_tdm_dai_ops, 1037 }; 1038 1039 static int rockchip_i2s_tdm_init_dai(struct rk_i2s_tdm_dev *i2s_tdm) 1040 { 1041 struct snd_soc_dai_driver *dai; 1042 struct property *dma_names; 1043 const char *dma_name; 1044 u64 formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | 1045 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE | 1046 SNDRV_PCM_FMTBIT_S32_LE); 1047 struct device_node *node = i2s_tdm->dev->of_node; 1048 1049 of_property_for_each_string(node, "dma-names", dma_names, dma_name) { 1050 if (!strcmp(dma_name, "tx")) 1051 i2s_tdm->has_playback = true; 1052 if (!strcmp(dma_name, "rx")) 1053 i2s_tdm->has_capture = true; 1054 } 1055 1056 dai = devm_kmemdup(i2s_tdm->dev, &i2s_tdm_dai, 1057 sizeof(*dai), GFP_KERNEL); 1058 if (!dai) 1059 return -ENOMEM; 1060 1061 if (i2s_tdm->has_playback) { 1062 dai->playback.stream_name = "Playback"; 1063 dai->playback.channels_min = 2; 1064 dai->playback.channels_max = 8; 1065 dai->playback.rates = SNDRV_PCM_RATE_8000_192000; 1066 dai->playback.formats = formats; 1067 } 1068 1069 if (i2s_tdm->has_capture) { 1070 dai->capture.stream_name = "Capture"; 1071 dai->capture.channels_min = 2; 1072 dai->capture.channels_max = 8; 1073 dai->capture.rates = SNDRV_PCM_RATE_8000_192000; 1074 dai->capture.formats = formats; 1075 } 1076 1077 if (i2s_tdm->clk_trcm != TRCM_TXRX) 1078 dai->symmetric_rate = 1; 1079 1080 i2s_tdm->dai = dai; 1081 1082 return 0; 1083 } 1084 1085 static int rockchip_i2s_tdm_path_check(struct rk_i2s_tdm_dev *i2s_tdm, 1086 int num, 1087 bool is_rx_path) 1088 { 1089 unsigned int *i2s_data; 1090 int i, j; 1091 1092 if (is_rx_path) 1093 i2s_data = i2s_tdm->i2s_sdis; 1094 else 1095 i2s_data = i2s_tdm->i2s_sdos; 1096 1097 for (i = 0; i < num; i++) { 1098 if (i2s_data[i] > CH_GRP_MAX - 1) { 1099 dev_err(i2s_tdm->dev, 1100 "%s path i2s_data[%d]: %d is too high, max is: %d\n", 1101 is_rx_path ? "RX" : "TX", 1102 i, i2s_data[i], CH_GRP_MAX); 1103 return -EINVAL; 1104 } 1105 1106 for (j = 0; j < num; j++) { 1107 if (i == j) 1108 continue; 1109 1110 if (i2s_data[i] == i2s_data[j]) { 1111 dev_err(i2s_tdm->dev, 1112 "%s path invalid routed i2s_data: [%d]%d == [%d]%d\n", 1113 is_rx_path ? "RX" : "TX", 1114 i, i2s_data[i], 1115 j, i2s_data[j]); 1116 return -EINVAL; 1117 } 1118 } 1119 } 1120 1121 return 0; 1122 } 1123 1124 static void rockchip_i2s_tdm_tx_path_config(struct rk_i2s_tdm_dev *i2s_tdm, 1125 int num) 1126 { 1127 int idx; 1128 1129 for (idx = 0; idx < num; idx++) { 1130 regmap_update_bits(i2s_tdm->regmap, I2S_TXCR, 1131 I2S_TXCR_PATH_MASK(idx), 1132 I2S_TXCR_PATH(idx, i2s_tdm->i2s_sdos[idx])); 1133 } 1134 } 1135 1136 static void rockchip_i2s_tdm_rx_path_config(struct rk_i2s_tdm_dev *i2s_tdm, 1137 int num) 1138 { 1139 int idx; 1140 1141 for (idx = 0; idx < num; idx++) { 1142 regmap_update_bits(i2s_tdm->regmap, I2S_RXCR, 1143 I2S_RXCR_PATH_MASK(idx), 1144 I2S_RXCR_PATH(idx, i2s_tdm->i2s_sdis[idx])); 1145 } 1146 } 1147 1148 static void rockchip_i2s_tdm_path_config(struct rk_i2s_tdm_dev *i2s_tdm, 1149 int num, bool is_rx_path) 1150 { 1151 if (is_rx_path) 1152 rockchip_i2s_tdm_rx_path_config(i2s_tdm, num); 1153 else 1154 rockchip_i2s_tdm_tx_path_config(i2s_tdm, num); 1155 } 1156 1157 static int rockchip_i2s_tdm_path_prepare(struct rk_i2s_tdm_dev *i2s_tdm, 1158 struct device_node *np, 1159 bool is_rx_path) 1160 { 1161 char *i2s_tx_path_prop = "rockchip,i2s-tx-route"; 1162 char *i2s_rx_path_prop = "rockchip,i2s-rx-route"; 1163 char *i2s_path_prop; 1164 unsigned int *i2s_data; 1165 int num, ret = 0; 1166 1167 if (is_rx_path) { 1168 i2s_path_prop = i2s_rx_path_prop; 1169 i2s_data = i2s_tdm->i2s_sdis; 1170 } else { 1171 i2s_path_prop = i2s_tx_path_prop; 1172 i2s_data = i2s_tdm->i2s_sdos; 1173 } 1174 1175 num = of_count_phandle_with_args(np, i2s_path_prop, NULL); 1176 if (num < 0) { 1177 if (num != -ENOENT) { 1178 dev_err(i2s_tdm->dev, 1179 "Failed to read '%s' num: %d\n", 1180 i2s_path_prop, num); 1181 ret = num; 1182 } 1183 return ret; 1184 } else if (num != CH_GRP_MAX) { 1185 dev_err(i2s_tdm->dev, 1186 "The num: %d should be: %d\n", num, CH_GRP_MAX); 1187 return -EINVAL; 1188 } 1189 1190 ret = of_property_read_u32_array(np, i2s_path_prop, 1191 i2s_data, num); 1192 if (ret < 0) { 1193 dev_err(i2s_tdm->dev, 1194 "Failed to read '%s': %d\n", 1195 i2s_path_prop, ret); 1196 return ret; 1197 } 1198 1199 ret = rockchip_i2s_tdm_path_check(i2s_tdm, num, is_rx_path); 1200 if (ret < 0) { 1201 dev_err(i2s_tdm->dev, 1202 "Failed to check i2s data bus: %d\n", ret); 1203 return ret; 1204 } 1205 1206 rockchip_i2s_tdm_path_config(i2s_tdm, num, is_rx_path); 1207 1208 return 0; 1209 } 1210 1211 static int rockchip_i2s_tdm_tx_path_prepare(struct rk_i2s_tdm_dev *i2s_tdm, 1212 struct device_node *np) 1213 { 1214 return rockchip_i2s_tdm_path_prepare(i2s_tdm, np, 0); 1215 } 1216 1217 static int rockchip_i2s_tdm_rx_path_prepare(struct rk_i2s_tdm_dev *i2s_tdm, 1218 struct device_node *np) 1219 { 1220 return rockchip_i2s_tdm_path_prepare(i2s_tdm, np, 1); 1221 } 1222 1223 static int rockchip_i2s_tdm_probe(struct platform_device *pdev) 1224 { 1225 struct device_node *node = pdev->dev.of_node; 1226 struct rk_i2s_tdm_dev *i2s_tdm; 1227 struct resource *res; 1228 void __iomem *regs; 1229 int ret; 1230 1231 i2s_tdm = devm_kzalloc(&pdev->dev, sizeof(*i2s_tdm), GFP_KERNEL); 1232 if (!i2s_tdm) 1233 return -ENOMEM; 1234 1235 i2s_tdm->dev = &pdev->dev; 1236 1237 spin_lock_init(&i2s_tdm->lock); 1238 i2s_tdm->soc_data = device_get_match_data(&pdev->dev); 1239 i2s_tdm->frame_width = 64; 1240 1241 i2s_tdm->clk_trcm = TRCM_TXRX; 1242 if (of_property_read_bool(node, "rockchip,trcm-sync-tx-only")) 1243 i2s_tdm->clk_trcm = TRCM_TX; 1244 if (of_property_read_bool(node, "rockchip,trcm-sync-rx-only")) { 1245 if (i2s_tdm->clk_trcm) { 1246 dev_err(i2s_tdm->dev, "invalid trcm-sync configuration\n"); 1247 return -EINVAL; 1248 } 1249 i2s_tdm->clk_trcm = TRCM_RX; 1250 } 1251 1252 ret = rockchip_i2s_tdm_init_dai(i2s_tdm); 1253 if (ret) 1254 return ret; 1255 1256 i2s_tdm->grf = syscon_regmap_lookup_by_phandle(node, "rockchip,grf"); 1257 i2s_tdm->tx_reset = devm_reset_control_get_optional_exclusive(&pdev->dev, 1258 "tx-m"); 1259 if (IS_ERR(i2s_tdm->tx_reset)) { 1260 ret = PTR_ERR(i2s_tdm->tx_reset); 1261 return dev_err_probe(i2s_tdm->dev, ret, 1262 "Error in tx-m reset control\n"); 1263 } 1264 1265 i2s_tdm->rx_reset = devm_reset_control_get_optional_exclusive(&pdev->dev, 1266 "rx-m"); 1267 if (IS_ERR(i2s_tdm->rx_reset)) { 1268 ret = PTR_ERR(i2s_tdm->rx_reset); 1269 return dev_err_probe(i2s_tdm->dev, ret, 1270 "Error in rx-m reset control\n"); 1271 } 1272 1273 i2s_tdm->hclk = devm_clk_get(&pdev->dev, "hclk"); 1274 if (IS_ERR(i2s_tdm->hclk)) { 1275 return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->hclk), 1276 "Failed to get clock hclk\n"); 1277 } 1278 1279 i2s_tdm->mclk_tx = devm_clk_get(&pdev->dev, "mclk_tx"); 1280 if (IS_ERR(i2s_tdm->mclk_tx)) { 1281 return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->mclk_tx), 1282 "Failed to get clock mclk_tx\n"); 1283 } 1284 1285 i2s_tdm->mclk_rx = devm_clk_get(&pdev->dev, "mclk_rx"); 1286 if (IS_ERR(i2s_tdm->mclk_rx)) { 1287 return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->mclk_rx), 1288 "Failed to get clock mclk_rx\n"); 1289 } 1290 1291 i2s_tdm->io_multiplex = 1292 of_property_read_bool(node, "rockchip,io-multiplex"); 1293 1294 regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 1295 if (IS_ERR(regs)) { 1296 return dev_err_probe(i2s_tdm->dev, PTR_ERR(regs), 1297 "Failed to get resource IORESOURCE_MEM\n"); 1298 } 1299 1300 i2s_tdm->regmap = devm_regmap_init_mmio(&pdev->dev, regs, 1301 &rockchip_i2s_tdm_regmap_config); 1302 if (IS_ERR(i2s_tdm->regmap)) { 1303 return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->regmap), 1304 "Failed to initialise regmap\n"); 1305 } 1306 1307 if (i2s_tdm->has_playback) { 1308 i2s_tdm->playback_dma_data.addr = res->start + I2S_TXDR; 1309 i2s_tdm->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 1310 i2s_tdm->playback_dma_data.maxburst = 8; 1311 } 1312 1313 if (i2s_tdm->has_capture) { 1314 i2s_tdm->capture_dma_data.addr = res->start + I2S_RXDR; 1315 i2s_tdm->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 1316 i2s_tdm->capture_dma_data.maxburst = 8; 1317 } 1318 1319 ret = rockchip_i2s_tdm_tx_path_prepare(i2s_tdm, node); 1320 if (ret < 0) { 1321 dev_err(&pdev->dev, "I2S TX path prepare failed: %d\n", ret); 1322 return ret; 1323 } 1324 1325 ret = rockchip_i2s_tdm_rx_path_prepare(i2s_tdm, node); 1326 if (ret < 0) { 1327 dev_err(&pdev->dev, "I2S RX path prepare failed: %d\n", ret); 1328 return ret; 1329 } 1330 1331 dev_set_drvdata(&pdev->dev, i2s_tdm); 1332 1333 ret = clk_prepare_enable(i2s_tdm->hclk); 1334 if (ret) { 1335 return dev_err_probe(i2s_tdm->dev, ret, 1336 "Failed to enable clock hclk\n"); 1337 } 1338 1339 ret = i2s_tdm_prepare_enable_mclk(i2s_tdm); 1340 if (ret) { 1341 ret = dev_err_probe(i2s_tdm->dev, ret, 1342 "Failed to enable one or more mclks\n"); 1343 goto err_disable_hclk; 1344 } 1345 1346 pm_runtime_enable(&pdev->dev); 1347 1348 regmap_update_bits(i2s_tdm->regmap, I2S_DMACR, I2S_DMACR_TDL_MASK, 1349 I2S_DMACR_TDL(16)); 1350 regmap_update_bits(i2s_tdm->regmap, I2S_DMACR, I2S_DMACR_RDL_MASK, 1351 I2S_DMACR_RDL(16)); 1352 regmap_update_bits(i2s_tdm->regmap, I2S_CKR, I2S_CKR_TRCM_MASK, 1353 i2s_tdm->clk_trcm << I2S_CKR_TRCM_SHIFT); 1354 1355 if (i2s_tdm->soc_data && i2s_tdm->soc_data->init) 1356 i2s_tdm->soc_data->init(&pdev->dev, res->start); 1357 1358 ret = devm_snd_soc_register_component(&pdev->dev, 1359 &rockchip_i2s_tdm_component, 1360 i2s_tdm->dai, 1); 1361 1362 if (ret) { 1363 dev_err(&pdev->dev, "Could not register DAI\n"); 1364 goto err_suspend; 1365 } 1366 1367 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0); 1368 if (ret) { 1369 dev_err(&pdev->dev, "Could not register PCM\n"); 1370 goto err_suspend; 1371 } 1372 1373 return 0; 1374 1375 err_suspend: 1376 if (!pm_runtime_status_suspended(&pdev->dev)) 1377 i2s_tdm_runtime_suspend(&pdev->dev); 1378 pm_runtime_disable(&pdev->dev); 1379 1380 err_disable_hclk: 1381 clk_disable_unprepare(i2s_tdm->hclk); 1382 1383 return ret; 1384 } 1385 1386 static void rockchip_i2s_tdm_remove(struct platform_device *pdev) 1387 { 1388 if (!pm_runtime_status_suspended(&pdev->dev)) 1389 i2s_tdm_runtime_suspend(&pdev->dev); 1390 1391 pm_runtime_disable(&pdev->dev); 1392 } 1393 1394 static int __maybe_unused rockchip_i2s_tdm_suspend(struct device *dev) 1395 { 1396 struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev); 1397 1398 regcache_mark_dirty(i2s_tdm->regmap); 1399 1400 return 0; 1401 } 1402 1403 static int __maybe_unused rockchip_i2s_tdm_resume(struct device *dev) 1404 { 1405 struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev); 1406 int ret; 1407 1408 ret = pm_runtime_resume_and_get(dev); 1409 if (ret < 0) 1410 return ret; 1411 ret = regcache_sync(i2s_tdm->regmap); 1412 pm_runtime_put(dev); 1413 1414 return ret; 1415 } 1416 1417 static const struct dev_pm_ops rockchip_i2s_tdm_pm_ops = { 1418 SET_RUNTIME_PM_OPS(i2s_tdm_runtime_suspend, i2s_tdm_runtime_resume, 1419 NULL) 1420 SET_SYSTEM_SLEEP_PM_OPS(rockchip_i2s_tdm_suspend, 1421 rockchip_i2s_tdm_resume) 1422 }; 1423 1424 static struct platform_driver rockchip_i2s_tdm_driver = { 1425 .probe = rockchip_i2s_tdm_probe, 1426 .remove = rockchip_i2s_tdm_remove, 1427 .driver = { 1428 .name = DRV_NAME, 1429 .of_match_table = rockchip_i2s_tdm_match, 1430 .pm = &rockchip_i2s_tdm_pm_ops, 1431 }, 1432 }; 1433 module_platform_driver(rockchip_i2s_tdm_driver); 1434 1435 MODULE_DESCRIPTION("ROCKCHIP I2S/TDM ASoC Interface"); 1436 MODULE_AUTHOR("Sugar Zhang <sugar.zhang@rock-chips.com>"); 1437 MODULE_LICENSE("GPL v2"); 1438 MODULE_ALIAS("platform:" DRV_NAME); 1439 MODULE_DEVICE_TABLE(of, rockchip_i2s_tdm_match); 1440