1 /* 2 * ALSA SoC Synopsys I2S Audio Layer 3 * 4 * sound/soc/dwc/designware_i2s.c 5 * 6 * Copyright (C) 2010 ST Microelectronics 7 * Rajeev Kumar <rajeevkumar.linux@gmail.com> 8 * 9 * This file is licensed under the terms of the GNU General Public 10 * License version 2. This program is licensed "as is" without any 11 * warranty of any kind, whether express or implied. 12 */ 13 14 #include <linux/clk.h> 15 #include <linux/device.h> 16 #include <linux/init.h> 17 #include <linux/io.h> 18 #include <linux/interrupt.h> 19 #include <linux/mfd/syscon.h> 20 #include <linux/module.h> 21 #include <linux/reset.h> 22 #include <linux/slab.h> 23 #include <linux/pm_runtime.h> 24 #include <sound/designware_i2s.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 #include <sound/soc.h> 28 #include <sound/dmaengine_pcm.h> 29 #include "local.h" 30 31 static inline void i2s_write_reg(void __iomem *io_base, int reg, u32 val) 32 { 33 writel(val, io_base + reg); 34 } 35 36 static inline u32 i2s_read_reg(void __iomem *io_base, int reg) 37 { 38 return readl(io_base + reg); 39 } 40 41 static inline void i2s_disable_channels(struct dw_i2s_dev *dev, u32 stream) 42 { 43 u32 i = 0; 44 45 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 46 for (i = 0; i < 4; i++) 47 i2s_write_reg(dev->i2s_base, TER(i), 0); 48 } else { 49 for (i = 0; i < 4; i++) 50 i2s_write_reg(dev->i2s_base, RER(i), 0); 51 } 52 } 53 54 static inline void i2s_clear_irqs(struct dw_i2s_dev *dev, u32 stream) 55 { 56 u32 i = 0; 57 58 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 59 for (i = 0; i < 4; i++) 60 i2s_read_reg(dev->i2s_base, TOR(i)); 61 } else { 62 for (i = 0; i < 4; i++) 63 i2s_read_reg(dev->i2s_base, ROR(i)); 64 } 65 } 66 67 static inline void i2s_disable_irqs(struct dw_i2s_dev *dev, u32 stream, 68 int chan_nr) 69 { 70 u32 i, irq; 71 72 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 73 for (i = 0; i < (chan_nr / 2); i++) { 74 irq = i2s_read_reg(dev->i2s_base, IMR(i)); 75 i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x30); 76 } 77 } else { 78 for (i = 0; i < (chan_nr / 2); i++) { 79 irq = i2s_read_reg(dev->i2s_base, IMR(i)); 80 i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x03); 81 } 82 } 83 } 84 85 static inline void i2s_enable_irqs(struct dw_i2s_dev *dev, u32 stream, 86 int chan_nr) 87 { 88 u32 i, irq; 89 90 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 91 for (i = 0; i < (chan_nr / 2); i++) { 92 irq = i2s_read_reg(dev->i2s_base, IMR(i)); 93 i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x30); 94 } 95 } else { 96 for (i = 0; i < (chan_nr / 2); i++) { 97 irq = i2s_read_reg(dev->i2s_base, IMR(i)); 98 i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x03); 99 } 100 } 101 } 102 103 static irqreturn_t i2s_irq_handler(int irq, void *dev_id) 104 { 105 struct dw_i2s_dev *dev = dev_id; 106 bool irq_valid = false; 107 u32 isr[4]; 108 int i; 109 110 for (i = 0; i < 4; i++) 111 isr[i] = i2s_read_reg(dev->i2s_base, ISR(i)); 112 113 i2s_clear_irqs(dev, SNDRV_PCM_STREAM_PLAYBACK); 114 i2s_clear_irqs(dev, SNDRV_PCM_STREAM_CAPTURE); 115 116 for (i = 0; i < 4; i++) { 117 /* 118 * Check if TX fifo is empty. If empty fill FIFO with samples 119 * NOTE: Only two channels supported 120 */ 121 if ((isr[i] & ISR_TXFE) && (i == 0) && dev->use_pio) { 122 dw_pcm_push_tx(dev); 123 irq_valid = true; 124 } 125 126 /* 127 * Data available. Retrieve samples from FIFO 128 * NOTE: Only two channels supported 129 */ 130 if ((isr[i] & ISR_RXDA) && (i == 0) && dev->use_pio) { 131 dw_pcm_pop_rx(dev); 132 irq_valid = true; 133 } 134 135 /* Error Handling: TX */ 136 if (isr[i] & ISR_TXFO) { 137 dev_err_ratelimited(dev->dev, "TX overrun (ch_id=%d)\n", i); 138 irq_valid = true; 139 } 140 141 /* Error Handling: TX */ 142 if (isr[i] & ISR_RXFO) { 143 dev_err_ratelimited(dev->dev, "RX overrun (ch_id=%d)\n", i); 144 irq_valid = true; 145 } 146 } 147 148 if (irq_valid) 149 return IRQ_HANDLED; 150 else 151 return IRQ_NONE; 152 } 153 154 static void i2s_enable_dma(struct dw_i2s_dev *dev, u32 stream) 155 { 156 u32 dma_reg = i2s_read_reg(dev->i2s_base, I2S_DMACR); 157 158 /* Enable DMA handshake for stream */ 159 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 160 dma_reg |= I2S_DMAEN_TXBLOCK; 161 else 162 dma_reg |= I2S_DMAEN_RXBLOCK; 163 164 i2s_write_reg(dev->i2s_base, I2S_DMACR, dma_reg); 165 } 166 167 static void i2s_disable_dma(struct dw_i2s_dev *dev, u32 stream) 168 { 169 u32 dma_reg = i2s_read_reg(dev->i2s_base, I2S_DMACR); 170 171 /* Disable DMA handshake for stream */ 172 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 173 dma_reg &= ~I2S_DMAEN_TXBLOCK; 174 i2s_write_reg(dev->i2s_base, I2S_RTXDMA, 1); 175 } else { 176 dma_reg &= ~I2S_DMAEN_RXBLOCK; 177 i2s_write_reg(dev->i2s_base, I2S_RRXDMA, 1); 178 } 179 i2s_write_reg(dev->i2s_base, I2S_DMACR, dma_reg); 180 } 181 182 static void i2s_start(struct dw_i2s_dev *dev, 183 struct snd_pcm_substream *substream) 184 { 185 struct i2s_clk_config_data *config = &dev->config; 186 187 u32 reg = IER_IEN; 188 189 if (dev->tdm_slots) { 190 reg |= (dev->tdm_slots - 1) << IER_TDM_SLOTS_SHIFT; 191 reg |= IER_INTF_TYPE; 192 reg |= dev->frame_offset << IER_FRAME_OFF_SHIFT; 193 } 194 195 i2s_write_reg(dev->i2s_base, IER, reg); 196 197 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 198 i2s_write_reg(dev->i2s_base, ITER, 1); 199 else 200 i2s_write_reg(dev->i2s_base, IRER, 1); 201 202 /* I2S needs to enable IRQ to make a handshake with DMAC on the JH7110 SoC */ 203 if (dev->use_pio || dev->is_jh7110) 204 i2s_enable_irqs(dev, substream->stream, config->chan_nr); 205 else 206 i2s_enable_dma(dev, substream->stream); 207 208 i2s_write_reg(dev->i2s_base, CER, 1); 209 } 210 211 static void i2s_stop(struct dw_i2s_dev *dev, 212 struct snd_pcm_substream *substream) 213 { 214 215 i2s_clear_irqs(dev, substream->stream); 216 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 217 i2s_write_reg(dev->i2s_base, ITER, 0); 218 else 219 i2s_write_reg(dev->i2s_base, IRER, 0); 220 221 if (dev->use_pio || dev->is_jh7110) 222 i2s_disable_irqs(dev, substream->stream, 8); 223 else 224 i2s_disable_dma(dev, substream->stream); 225 226 if (!dev->active) { 227 i2s_write_reg(dev->i2s_base, CER, 0); 228 i2s_write_reg(dev->i2s_base, IER, 0); 229 } 230 } 231 232 static int dw_i2s_startup(struct snd_pcm_substream *substream, 233 struct snd_soc_dai *cpu_dai) 234 { 235 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai); 236 237 if (dev->is_jh7110) { 238 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 239 struct snd_soc_dai_link *dai_link = rtd->dai_link; 240 241 dai_link->trigger_stop = SND_SOC_TRIGGER_ORDER_LDC; 242 } 243 244 return 0; 245 } 246 247 static void dw_i2s_config(struct dw_i2s_dev *dev, int stream) 248 { 249 u32 ch_reg; 250 struct i2s_clk_config_data *config = &dev->config; 251 252 253 i2s_disable_channels(dev, stream); 254 255 for (ch_reg = 0; ch_reg < (config->chan_nr / 2); ch_reg++) { 256 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 257 i2s_write_reg(dev->i2s_base, TCR(ch_reg), 258 dev->xfer_resolution); 259 i2s_write_reg(dev->i2s_base, TFCR(ch_reg), 260 dev->fifo_th - 1); 261 i2s_write_reg(dev->i2s_base, TER(ch_reg), TER_TXCHEN | 262 dev->tdm_mask << TER_TXSLOT_SHIFT); 263 } else { 264 i2s_write_reg(dev->i2s_base, RCR(ch_reg), 265 dev->xfer_resolution); 266 i2s_write_reg(dev->i2s_base, RFCR(ch_reg), 267 dev->fifo_th - 1); 268 i2s_write_reg(dev->i2s_base, RER(ch_reg), RER_RXCHEN | 269 dev->tdm_mask << RER_RXSLOT_SHIFT); 270 } 271 272 } 273 } 274 275 static int dw_i2s_hw_params(struct snd_pcm_substream *substream, 276 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) 277 { 278 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); 279 struct i2s_clk_config_data *config = &dev->config; 280 int ret; 281 282 switch (params_format(params)) { 283 case SNDRV_PCM_FORMAT_S16_LE: 284 config->data_width = 16; 285 dev->ccr = 0x00; 286 dev->xfer_resolution = 0x02; 287 break; 288 289 case SNDRV_PCM_FORMAT_S24_LE: 290 config->data_width = 24; 291 dev->ccr = 0x08; 292 dev->xfer_resolution = 0x04; 293 break; 294 295 case SNDRV_PCM_FORMAT_S32_LE: 296 config->data_width = 32; 297 dev->ccr = 0x10; 298 dev->xfer_resolution = 0x05; 299 break; 300 301 default: 302 dev_err(dev->dev, "designware-i2s: unsupported PCM fmt"); 303 return -EINVAL; 304 } 305 306 if (dev->tdm_slots) 307 config->data_width = 32; 308 309 config->chan_nr = params_channels(params); 310 311 switch (config->chan_nr) { 312 case EIGHT_CHANNEL_SUPPORT: 313 case SIX_CHANNEL_SUPPORT: 314 case FOUR_CHANNEL_SUPPORT: 315 case TWO_CHANNEL_SUPPORT: 316 break; 317 default: 318 dev_err(dev->dev, "channel not supported\n"); 319 return -EINVAL; 320 } 321 322 dw_i2s_config(dev, substream->stream); 323 324 i2s_write_reg(dev->i2s_base, CCR, dev->ccr); 325 326 config->sample_rate = params_rate(params); 327 328 if (dev->capability & DW_I2S_MASTER) { 329 if (dev->i2s_clk_cfg) { 330 ret = dev->i2s_clk_cfg(config); 331 if (ret < 0) { 332 dev_err(dev->dev, "runtime audio clk config fail\n"); 333 return ret; 334 } 335 } else { 336 u32 bitclk = config->sample_rate * 337 config->data_width * 2; 338 339 ret = clk_set_rate(dev->clk, bitclk); 340 if (ret) { 341 dev_err(dev->dev, "Can't set I2S clock rate: %d\n", 342 ret); 343 return ret; 344 } 345 } 346 } 347 return 0; 348 } 349 350 static int dw_i2s_prepare(struct snd_pcm_substream *substream, 351 struct snd_soc_dai *dai) 352 { 353 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); 354 355 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 356 i2s_write_reg(dev->i2s_base, TXFFR, 1); 357 else 358 i2s_write_reg(dev->i2s_base, RXFFR, 1); 359 360 return 0; 361 } 362 363 static int dw_i2s_trigger(struct snd_pcm_substream *substream, 364 int cmd, struct snd_soc_dai *dai) 365 { 366 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); 367 int ret = 0; 368 369 switch (cmd) { 370 case SNDRV_PCM_TRIGGER_START: 371 case SNDRV_PCM_TRIGGER_RESUME: 372 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 373 dev->active++; 374 i2s_start(dev, substream); 375 break; 376 377 case SNDRV_PCM_TRIGGER_STOP: 378 case SNDRV_PCM_TRIGGER_SUSPEND: 379 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 380 dev->active--; 381 i2s_stop(dev, substream); 382 break; 383 default: 384 ret = -EINVAL; 385 break; 386 } 387 return ret; 388 } 389 390 static int dw_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) 391 { 392 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai); 393 int ret = 0; 394 395 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 396 case SND_SOC_DAIFMT_BC_FC: 397 if (dev->capability & DW_I2S_SLAVE) 398 ret = 0; 399 else 400 ret = -EINVAL; 401 break; 402 case SND_SOC_DAIFMT_BP_FP: 403 if (dev->capability & DW_I2S_MASTER) 404 ret = 0; 405 else 406 ret = -EINVAL; 407 break; 408 case SND_SOC_DAIFMT_BC_FP: 409 case SND_SOC_DAIFMT_BP_FC: 410 ret = -EINVAL; 411 break; 412 default: 413 dev_dbg(dev->dev, "dwc : Invalid clock provider format\n"); 414 ret = -EINVAL; 415 break; 416 } 417 418 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 419 case SND_SOC_DAIFMT_I2S: 420 case SND_SOC_DAIFMT_LEFT_J: 421 case SND_SOC_DAIFMT_RIGHT_J: 422 break; 423 case SND_SOC_DAIFMT_DSP_A: 424 dev->frame_offset = 1; 425 break; 426 case SND_SOC_DAIFMT_DSP_B: 427 dev->frame_offset = 0; 428 break; 429 default: 430 dev_err(dev->dev, "DAI format unsupported"); 431 return -EINVAL; 432 } 433 434 return ret; 435 } 436 437 static int dw_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, unsigned int tx_mask, 438 unsigned int rx_mask, int slots, int slot_width) 439 { 440 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai); 441 442 if (slot_width != 32) 443 return -EINVAL; 444 445 if (slots < 0 || slots > 16) 446 return -EINVAL; 447 448 if (rx_mask != tx_mask) 449 return -EINVAL; 450 451 if (!rx_mask) 452 return -EINVAL; 453 454 dev->tdm_slots = slots; 455 dev->tdm_mask = rx_mask; 456 457 dev->l_reg = RSLOT_TSLOT(ffs(rx_mask) - 1); 458 dev->r_reg = RSLOT_TSLOT(fls(rx_mask) - 1); 459 460 return 0; 461 } 462 463 static int dw_i2s_dai_probe(struct snd_soc_dai *dai) 464 { 465 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); 466 467 snd_soc_dai_init_dma_data(dai, &dev->play_dma_data, &dev->capture_dma_data); 468 return 0; 469 } 470 471 static const struct snd_soc_dai_ops dw_i2s_dai_ops = { 472 .probe = dw_i2s_dai_probe, 473 .startup = dw_i2s_startup, 474 .hw_params = dw_i2s_hw_params, 475 .prepare = dw_i2s_prepare, 476 .trigger = dw_i2s_trigger, 477 .set_fmt = dw_i2s_set_fmt, 478 .set_tdm_slot = dw_i2s_set_tdm_slot, 479 }; 480 481 #ifdef CONFIG_PM 482 static int dw_i2s_runtime_suspend(struct device *dev) 483 { 484 struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev); 485 486 if (dw_dev->capability & DW_I2S_MASTER) 487 clk_disable(dw_dev->clk); 488 return 0; 489 } 490 491 static int dw_i2s_runtime_resume(struct device *dev) 492 { 493 struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev); 494 int ret; 495 496 if (dw_dev->capability & DW_I2S_MASTER) { 497 ret = clk_enable(dw_dev->clk); 498 if (ret) 499 return ret; 500 } 501 return 0; 502 } 503 504 static int dw_i2s_suspend(struct snd_soc_component *component) 505 { 506 struct dw_i2s_dev *dev = snd_soc_component_get_drvdata(component); 507 508 if (dev->capability & DW_I2S_MASTER) 509 clk_disable(dev->clk); 510 return 0; 511 } 512 513 static int dw_i2s_resume(struct snd_soc_component *component) 514 { 515 struct dw_i2s_dev *dev = snd_soc_component_get_drvdata(component); 516 struct snd_soc_dai *dai; 517 int stream, ret; 518 519 if (dev->capability & DW_I2S_MASTER) { 520 ret = clk_enable(dev->clk); 521 if (ret) 522 return ret; 523 } 524 525 for_each_component_dais(component, dai) { 526 for_each_pcm_streams(stream) 527 if (snd_soc_dai_stream_active(dai, stream)) 528 dw_i2s_config(dev, stream); 529 } 530 531 return 0; 532 } 533 534 #else 535 #define dw_i2s_suspend NULL 536 #define dw_i2s_resume NULL 537 #endif 538 539 static const struct snd_soc_component_driver dw_i2s_component = { 540 .name = "dw-i2s", 541 .suspend = dw_i2s_suspend, 542 .resume = dw_i2s_resume, 543 .legacy_dai_naming = 1, 544 }; 545 546 /* 547 * The following tables allow a direct lookup of various parameters 548 * defined in the I2S block's configuration in terms of sound system 549 * parameters. Each table is sized to the number of entries possible 550 * according to the number of configuration bits describing an I2S 551 * block parameter. 552 */ 553 554 /* Maximum bit resolution of a channel - not uniformly spaced */ 555 static const u32 fifo_width[COMP_MAX_WORDSIZE] = { 556 12, 16, 20, 24, 32, 0, 0, 0 557 }; 558 559 /* Width of (DMA) bus */ 560 static const u32 bus_widths[COMP_MAX_DATA_WIDTH] = { 561 DMA_SLAVE_BUSWIDTH_1_BYTE, 562 DMA_SLAVE_BUSWIDTH_2_BYTES, 563 DMA_SLAVE_BUSWIDTH_4_BYTES, 564 DMA_SLAVE_BUSWIDTH_UNDEFINED 565 }; 566 567 /* PCM format to support channel resolution */ 568 static const u32 formats[COMP_MAX_WORDSIZE] = { 569 SNDRV_PCM_FMTBIT_S16_LE, 570 SNDRV_PCM_FMTBIT_S16_LE, 571 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 572 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 573 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE, 574 0, 575 0, 576 0 577 }; 578 579 static int dw_configure_dai(struct dw_i2s_dev *dev, 580 struct snd_soc_dai_driver *dw_i2s_dai, 581 unsigned int rates) 582 { 583 /* 584 * Read component parameter registers to extract 585 * the I2S block's configuration. 586 */ 587 u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1); 588 u32 comp2 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp2); 589 u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1)); 590 u32 idx; 591 592 if (dev->capability & DWC_I2S_RECORD && 593 dev->quirks & DW_I2S_QUIRK_COMP_PARAM1) 594 comp1 = comp1 & ~BIT(5); 595 596 if (dev->capability & DWC_I2S_PLAY && 597 dev->quirks & DW_I2S_QUIRK_COMP_PARAM1) 598 comp1 = comp1 & ~BIT(6); 599 600 if (COMP1_TX_ENABLED(comp1)) { 601 dev_dbg(dev->dev, " designware: play supported\n"); 602 idx = COMP1_TX_WORDSIZE_0(comp1); 603 if (WARN_ON(idx >= ARRAY_SIZE(formats))) 604 return -EINVAL; 605 if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) 606 idx = 1; 607 dw_i2s_dai->playback.channels_min = MIN_CHANNEL_NUM; 608 dw_i2s_dai->playback.channels_max = 609 1 << (COMP1_TX_CHANNELS(comp1) + 1); 610 dw_i2s_dai->playback.formats = formats[idx]; 611 dw_i2s_dai->playback.rates = rates; 612 } 613 614 if (COMP1_RX_ENABLED(comp1)) { 615 dev_dbg(dev->dev, "designware: record supported\n"); 616 idx = COMP2_RX_WORDSIZE_0(comp2); 617 if (WARN_ON(idx >= ARRAY_SIZE(formats))) 618 return -EINVAL; 619 if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) 620 idx = 1; 621 dw_i2s_dai->capture.channels_min = MIN_CHANNEL_NUM; 622 dw_i2s_dai->capture.channels_max = 623 1 << (COMP1_RX_CHANNELS(comp1) + 1); 624 dw_i2s_dai->capture.formats = formats[idx]; 625 dw_i2s_dai->capture.rates = rates; 626 } 627 628 if (COMP1_MODE_EN(comp1)) { 629 dev_dbg(dev->dev, "designware: i2s master mode supported\n"); 630 dev->capability |= DW_I2S_MASTER; 631 } else { 632 dev_dbg(dev->dev, "designware: i2s slave mode supported\n"); 633 dev->capability |= DW_I2S_SLAVE; 634 } 635 636 dev->fifo_th = fifo_depth / 2; 637 return 0; 638 } 639 640 static int dw_configure_dai_by_pd(struct dw_i2s_dev *dev, 641 struct snd_soc_dai_driver *dw_i2s_dai, 642 struct resource *res, 643 const struct i2s_platform_data *pdata) 644 { 645 u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1); 646 u32 idx = COMP1_APB_DATA_WIDTH(comp1); 647 int ret; 648 649 if (WARN_ON(idx >= ARRAY_SIZE(bus_widths))) 650 return -EINVAL; 651 652 ret = dw_configure_dai(dev, dw_i2s_dai, pdata->snd_rates); 653 if (ret < 0) 654 return ret; 655 656 if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) 657 idx = 1; 658 659 if (dev->is_jh7110) { 660 /* Use platform data and snd_dmaengine_dai_dma_data struct at the same time */ 661 u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2); 662 u32 idx2; 663 664 if (COMP1_TX_ENABLED(comp1)) { 665 idx2 = COMP1_TX_WORDSIZE_0(comp1); 666 dev->play_dma_data.dt.addr = res->start + I2S_TXDMA; 667 dev->play_dma_data.dt.fifo_size = dev->fifo_th * 2 * 668 (fifo_width[idx2]) >> 8; 669 dev->play_dma_data.dt.maxburst = 16; 670 } 671 if (COMP1_RX_ENABLED(comp1)) { 672 idx2 = COMP2_RX_WORDSIZE_0(comp2); 673 dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA; 674 dev->capture_dma_data.dt.fifo_size = dev->fifo_th * 2 * 675 (fifo_width[idx2] >> 8); 676 dev->capture_dma_data.dt.maxburst = 16; 677 } 678 } else { 679 /* Set DMA slaves info */ 680 dev->play_dma_data.pd.data = pdata->play_dma_data; 681 dev->capture_dma_data.pd.data = pdata->capture_dma_data; 682 dev->play_dma_data.pd.addr = res->start + I2S_TXDMA; 683 dev->capture_dma_data.pd.addr = res->start + I2S_RXDMA; 684 dev->play_dma_data.pd.max_burst = 16; 685 dev->capture_dma_data.pd.max_burst = 16; 686 dev->play_dma_data.pd.addr_width = bus_widths[idx]; 687 dev->capture_dma_data.pd.addr_width = bus_widths[idx]; 688 dev->play_dma_data.pd.filter = pdata->filter; 689 dev->capture_dma_data.pd.filter = pdata->filter; 690 } 691 692 return 0; 693 } 694 695 static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev, 696 struct snd_soc_dai_driver *dw_i2s_dai, 697 struct resource *res) 698 { 699 u32 comp1 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_1); 700 u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2); 701 u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1)); 702 u32 idx2; 703 int ret; 704 705 ret = dw_configure_dai(dev, dw_i2s_dai, SNDRV_PCM_RATE_8000_192000); 706 if (ret < 0) 707 return ret; 708 709 if (COMP1_TX_ENABLED(comp1)) { 710 idx2 = COMP1_TX_WORDSIZE_0(comp1); 711 712 dev->capability |= DWC_I2S_PLAY; 713 dev->play_dma_data.dt.addr = res->start + I2S_TXDMA; 714 dev->play_dma_data.dt.fifo_size = fifo_depth * 715 (fifo_width[idx2]) >> 8; 716 dev->play_dma_data.dt.maxburst = 16; 717 } 718 if (COMP1_RX_ENABLED(comp1)) { 719 idx2 = COMP2_RX_WORDSIZE_0(comp2); 720 721 dev->capability |= DWC_I2S_RECORD; 722 dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA; 723 dev->capture_dma_data.dt.fifo_size = fifo_depth * 724 (fifo_width[idx2] >> 8); 725 dev->capture_dma_data.dt.maxburst = 16; 726 } 727 728 return 0; 729 730 } 731 732 #ifdef CONFIG_OF 733 /* clocks initialization with master mode on JH7110 SoC */ 734 static int jh7110_i2s_crg_master_init(struct dw_i2s_dev *dev) 735 { 736 static struct clk_bulk_data clks[] = { 737 { .id = "mclk" }, 738 { .id = "mclk_ext" }, 739 { .id = "mclk_inner" }, 740 { .id = "apb" }, 741 { .id = "i2sclk" }, 742 }; 743 struct reset_control *resets = devm_reset_control_array_get_exclusive(dev->dev); 744 int ret; 745 struct clk *pclk; 746 struct clk *bclk_mst; 747 struct clk *mclk; 748 struct clk *mclk_ext; 749 struct clk *mclk_inner; 750 751 if (IS_ERR(resets)) 752 return dev_err_probe(dev->dev, PTR_ERR(resets), "failed to get i2s resets\n"); 753 754 ret = clk_bulk_get(dev->dev, ARRAY_SIZE(clks), clks); 755 if (ret) 756 return dev_err_probe(dev->dev, ret, "failed to get i2s clocks\n"); 757 758 mclk = clks[0].clk; 759 mclk_ext = clks[1].clk; 760 mclk_inner = clks[2].clk; 761 pclk = clks[3].clk; 762 bclk_mst = clks[4].clk; 763 764 ret = clk_prepare_enable(pclk); 765 if (ret) 766 goto exit; 767 768 /* Use inner mclk first and avoid uninitialized gpio for external mclk */ 769 ret = clk_set_parent(mclk, mclk_inner); 770 if (ret) 771 goto err_dis_pclk; 772 773 ret = clk_prepare_enable(bclk_mst); 774 if (ret) 775 goto err_dis_pclk; 776 777 /* deassert resets before set clock parent */ 778 ret = reset_control_deassert(resets); 779 if (ret) 780 goto err_dis_all; 781 782 /* external clock (12.288MHz) for Audio */ 783 ret = clk_set_parent(mclk, mclk_ext); 784 if (ret) 785 goto err_dis_all; 786 787 /* i2sclk will be got and enabled repeatedly later and should be disabled now. */ 788 clk_disable_unprepare(bclk_mst); 789 clk_bulk_put(ARRAY_SIZE(clks), clks); 790 dev->is_jh7110 = true; 791 792 return 0; 793 794 err_dis_all: 795 clk_disable_unprepare(bclk_mst); 796 err_dis_pclk: 797 clk_disable_unprepare(pclk); 798 exit: 799 clk_bulk_put(ARRAY_SIZE(clks), clks); 800 return ret; 801 } 802 803 /* clocks initialization with slave mode on JH7110 SoC */ 804 static int jh7110_i2s_crg_slave_init(struct dw_i2s_dev *dev) 805 { 806 static struct clk_bulk_data clks[] = { 807 { .id = "mclk" }, 808 { .id = "mclk_ext" }, 809 { .id = "apb" }, 810 { .id = "bclk_ext" }, 811 { .id = "lrck_ext" }, 812 { .id = "bclk" }, 813 { .id = "lrck" }, 814 { .id = "mclk_inner" }, 815 { .id = "i2sclk" }, 816 }; 817 struct reset_control *resets = devm_reset_control_array_get_exclusive(dev->dev); 818 int ret; 819 struct clk *pclk; 820 struct clk *bclk_mst; 821 struct clk *bclk_ext; 822 struct clk *lrck_ext; 823 struct clk *bclk; 824 struct clk *lrck; 825 struct clk *mclk; 826 struct clk *mclk_ext; 827 struct clk *mclk_inner; 828 829 if (IS_ERR(resets)) 830 return dev_err_probe(dev->dev, PTR_ERR(resets), "failed to get i2s resets\n"); 831 832 ret = clk_bulk_get(dev->dev, ARRAY_SIZE(clks), clks); 833 if (ret) 834 return dev_err_probe(dev->dev, ret, "failed to get i2s clocks\n"); 835 836 mclk = clks[0].clk; 837 mclk_ext = clks[1].clk; 838 pclk = clks[2].clk; 839 bclk_ext = clks[3].clk; 840 lrck_ext = clks[4].clk; 841 bclk = clks[5].clk; 842 lrck = clks[6].clk; 843 mclk_inner = clks[7].clk; 844 bclk_mst = clks[8].clk; 845 846 ret = clk_prepare_enable(pclk); 847 if (ret) 848 goto exit; 849 850 ret = clk_set_parent(mclk, mclk_inner); 851 if (ret) 852 goto err_dis_pclk; 853 854 ret = clk_prepare_enable(bclk_mst); 855 if (ret) 856 goto err_dis_pclk; 857 858 ret = reset_control_deassert(resets); 859 if (ret) 860 goto err_dis_all; 861 862 /* The sources of BCLK and LRCK are the external codec. */ 863 ret = clk_set_parent(bclk, bclk_ext); 864 if (ret) 865 goto err_dis_all; 866 867 ret = clk_set_parent(lrck, lrck_ext); 868 if (ret) 869 goto err_dis_all; 870 871 ret = clk_set_parent(mclk, mclk_ext); 872 if (ret) 873 goto err_dis_all; 874 875 /* The i2sclk will be got and enabled repeatedly later and should be disabled now. */ 876 clk_disable_unprepare(bclk_mst); 877 clk_bulk_put(ARRAY_SIZE(clks), clks); 878 dev->is_jh7110 = true; 879 880 return 0; 881 882 err_dis_all: 883 clk_disable_unprepare(bclk_mst); 884 err_dis_pclk: 885 clk_disable_unprepare(pclk); 886 exit: 887 clk_bulk_put(ARRAY_SIZE(clks), clks); 888 return ret; 889 } 890 891 /* Special syscon initialization about RX channel with slave mode on JH7110 SoC */ 892 static int jh7110_i2srx_crg_init(struct dw_i2s_dev *dev) 893 { 894 struct regmap *regmap; 895 unsigned int args[2]; 896 897 regmap = syscon_regmap_lookup_by_phandle_args(dev->dev->of_node, 898 "starfive,syscon", 899 2, args); 900 if (IS_ERR(regmap)) 901 return dev_err_probe(dev->dev, PTR_ERR(regmap), "getting the regmap failed\n"); 902 903 /* Enable I2Srx with syscon register, args[0]: offset, args[1]: mask */ 904 regmap_update_bits(regmap, args[0], args[1], args[1]); 905 906 return jh7110_i2s_crg_slave_init(dev); 907 } 908 909 static int jh7110_i2stx0_clk_cfg(struct i2s_clk_config_data *config) 910 { 911 struct dw_i2s_dev *dev = container_of(config, struct dw_i2s_dev, config); 912 u32 bclk_rate = config->sample_rate * 64; 913 914 return clk_set_rate(dev->clk, bclk_rate); 915 } 916 #endif /* CONFIG_OF */ 917 918 static int dw_i2s_probe(struct platform_device *pdev) 919 { 920 const struct i2s_platform_data *pdata = of_device_get_match_data(&pdev->dev); 921 struct dw_i2s_dev *dev; 922 struct resource *res; 923 int ret, irq; 924 struct snd_soc_dai_driver *dw_i2s_dai; 925 const char *clk_id; 926 927 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); 928 if (!dev) 929 return -ENOMEM; 930 931 dw_i2s_dai = devm_kzalloc(&pdev->dev, sizeof(*dw_i2s_dai), GFP_KERNEL); 932 if (!dw_i2s_dai) 933 return -ENOMEM; 934 935 dw_i2s_dai->ops = &dw_i2s_dai_ops; 936 937 dev->i2s_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 938 if (IS_ERR(dev->i2s_base)) 939 return PTR_ERR(dev->i2s_base); 940 941 dev->dev = &pdev->dev; 942 dev->is_jh7110 = false; 943 if (pdata) { 944 if (pdata->i2s_pd_init) { 945 ret = pdata->i2s_pd_init(dev); 946 if (ret) 947 return ret; 948 } 949 } 950 951 if (!dev->is_jh7110) { 952 dev->reset = devm_reset_control_array_get_optional_shared(&pdev->dev); 953 if (IS_ERR(dev->reset)) 954 return PTR_ERR(dev->reset); 955 956 ret = reset_control_deassert(dev->reset); 957 if (ret) 958 return ret; 959 } 960 961 irq = platform_get_irq_optional(pdev, 0); 962 if (irq >= 0) { 963 ret = devm_request_irq(&pdev->dev, irq, i2s_irq_handler, 0, 964 pdev->name, dev); 965 if (ret < 0) { 966 dev_err(&pdev->dev, "failed to request irq\n"); 967 goto err_assert_reset; 968 } 969 } 970 971 dev->i2s_reg_comp1 = I2S_COMP_PARAM_1; 972 dev->i2s_reg_comp2 = I2S_COMP_PARAM_2; 973 if (pdata) { 974 dev->capability = pdata->cap; 975 clk_id = NULL; 976 dev->quirks = pdata->quirks; 977 if (dev->quirks & DW_I2S_QUIRK_COMP_REG_OFFSET) { 978 dev->i2s_reg_comp1 = pdata->i2s_reg_comp1; 979 dev->i2s_reg_comp2 = pdata->i2s_reg_comp2; 980 } 981 ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata); 982 } else { 983 clk_id = "i2sclk"; 984 ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res); 985 } 986 if (ret < 0) 987 goto err_assert_reset; 988 989 if (dev->capability & DW_I2S_MASTER) { 990 if (pdata) { 991 dev->i2s_clk_cfg = pdata->i2s_clk_cfg; 992 if (!dev->i2s_clk_cfg) { 993 dev_err(&pdev->dev, "no clock configure method\n"); 994 ret = -ENODEV; 995 goto err_assert_reset; 996 } 997 } 998 dev->clk = devm_clk_get(&pdev->dev, clk_id); 999 1000 if (IS_ERR(dev->clk)) { 1001 ret = PTR_ERR(dev->clk); 1002 goto err_assert_reset; 1003 } 1004 1005 ret = clk_prepare_enable(dev->clk); 1006 if (ret < 0) 1007 goto err_assert_reset; 1008 } 1009 1010 dev_set_drvdata(&pdev->dev, dev); 1011 ret = devm_snd_soc_register_component(&pdev->dev, &dw_i2s_component, 1012 dw_i2s_dai, 1); 1013 if (ret != 0) { 1014 dev_err(&pdev->dev, "not able to register dai\n"); 1015 goto err_clk_disable; 1016 } 1017 1018 if (!pdata || dev->is_jh7110) { 1019 if (irq >= 0) { 1020 ret = dw_pcm_register(pdev); 1021 dev->use_pio = true; 1022 dev->l_reg = LRBR_LTHR(0); 1023 dev->r_reg = RRBR_RTHR(0); 1024 } else { 1025 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 1026 0); 1027 dev->use_pio = false; 1028 } 1029 1030 if (ret) { 1031 dev_err(&pdev->dev, "could not register pcm: %d\n", 1032 ret); 1033 goto err_clk_disable; 1034 } 1035 } 1036 1037 pm_runtime_enable(&pdev->dev); 1038 return 0; 1039 1040 err_clk_disable: 1041 if (dev->capability & DW_I2S_MASTER) 1042 clk_disable_unprepare(dev->clk); 1043 err_assert_reset: 1044 reset_control_assert(dev->reset); 1045 return ret; 1046 } 1047 1048 static void dw_i2s_remove(struct platform_device *pdev) 1049 { 1050 struct dw_i2s_dev *dev = dev_get_drvdata(&pdev->dev); 1051 1052 if (dev->capability & DW_I2S_MASTER) 1053 clk_disable_unprepare(dev->clk); 1054 1055 reset_control_assert(dev->reset); 1056 pm_runtime_disable(&pdev->dev); 1057 } 1058 1059 #ifdef CONFIG_OF 1060 static const struct i2s_platform_data jh7110_i2stx0_data = { 1061 .cap = DWC_I2S_PLAY | DW_I2S_MASTER, 1062 .channel = TWO_CHANNEL_SUPPORT, 1063 .snd_fmts = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE, 1064 .snd_rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000, 1065 .i2s_clk_cfg = jh7110_i2stx0_clk_cfg, 1066 .i2s_pd_init = jh7110_i2s_crg_master_init, 1067 }; 1068 1069 static const struct i2s_platform_data jh7110_i2stx1_data = { 1070 .cap = DWC_I2S_PLAY | DW_I2S_SLAVE, 1071 .channel = TWO_CHANNEL_SUPPORT, 1072 .snd_fmts = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE, 1073 .snd_rates = SNDRV_PCM_RATE_8000_192000, 1074 .i2s_pd_init = jh7110_i2s_crg_slave_init, 1075 }; 1076 1077 static const struct i2s_platform_data jh7110_i2srx_data = { 1078 .cap = DWC_I2S_RECORD | DW_I2S_SLAVE, 1079 .channel = TWO_CHANNEL_SUPPORT, 1080 .snd_fmts = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE, 1081 .snd_rates = SNDRV_PCM_RATE_8000_192000, 1082 .i2s_pd_init = jh7110_i2srx_crg_init, 1083 }; 1084 1085 static const struct of_device_id dw_i2s_of_match[] = { 1086 { .compatible = "snps,designware-i2s", }, 1087 { .compatible = "starfive,jh7110-i2stx0", .data = &jh7110_i2stx0_data, }, 1088 { .compatible = "starfive,jh7110-i2stx1", .data = &jh7110_i2stx1_data,}, 1089 { .compatible = "starfive,jh7110-i2srx", .data = &jh7110_i2srx_data,}, 1090 {}, 1091 }; 1092 1093 MODULE_DEVICE_TABLE(of, dw_i2s_of_match); 1094 #endif 1095 1096 static const struct dev_pm_ops dwc_pm_ops = { 1097 SET_RUNTIME_PM_OPS(dw_i2s_runtime_suspend, dw_i2s_runtime_resume, NULL) 1098 }; 1099 1100 static struct platform_driver dw_i2s_driver = { 1101 .probe = dw_i2s_probe, 1102 .remove_new = dw_i2s_remove, 1103 .driver = { 1104 .name = "designware-i2s", 1105 .of_match_table = of_match_ptr(dw_i2s_of_match), 1106 .pm = &dwc_pm_ops, 1107 }, 1108 }; 1109 1110 module_platform_driver(dw_i2s_driver); 1111 1112 MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>"); 1113 MODULE_DESCRIPTION("DESIGNWARE I2S SoC Interface"); 1114 MODULE_LICENSE("GPL"); 1115 MODULE_ALIAS("platform:designware_i2s"); 1116