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/module.h> 20 #include <linux/slab.h> 21 #include <linux/pm_runtime.h> 22 #include <sound/designware_i2s.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/dmaengine_pcm.h> 27 #include "local.h" 28 29 static inline void i2s_write_reg(void __iomem *io_base, int reg, u32 val) 30 { 31 writel(val, io_base + reg); 32 } 33 34 static inline u32 i2s_read_reg(void __iomem *io_base, int reg) 35 { 36 return readl(io_base + reg); 37 } 38 39 static inline void i2s_disable_channels(struct dw_i2s_dev *dev, u32 stream) 40 { 41 u32 i = 0; 42 43 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 44 for (i = 0; i < 4; i++) 45 i2s_write_reg(dev->i2s_base, TER(i), 0); 46 } else { 47 for (i = 0; i < 4; i++) 48 i2s_write_reg(dev->i2s_base, RER(i), 0); 49 } 50 } 51 52 static inline void i2s_clear_irqs(struct dw_i2s_dev *dev, u32 stream) 53 { 54 u32 i = 0; 55 56 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 57 for (i = 0; i < 4; i++) 58 i2s_read_reg(dev->i2s_base, TOR(i)); 59 } else { 60 for (i = 0; i < 4; i++) 61 i2s_read_reg(dev->i2s_base, ROR(i)); 62 } 63 } 64 65 static inline void i2s_disable_irqs(struct dw_i2s_dev *dev, u32 stream, 66 int chan_nr) 67 { 68 u32 i, irq; 69 70 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 71 for (i = 0; i < (chan_nr / 2); i++) { 72 irq = i2s_read_reg(dev->i2s_base, IMR(i)); 73 i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x30); 74 } 75 } else { 76 for (i = 0; i < (chan_nr / 2); i++) { 77 irq = i2s_read_reg(dev->i2s_base, IMR(i)); 78 i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x03); 79 } 80 } 81 } 82 83 static inline void i2s_enable_irqs(struct dw_i2s_dev *dev, u32 stream, 84 int chan_nr) 85 { 86 u32 i, irq; 87 88 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 89 for (i = 0; i < (chan_nr / 2); i++) { 90 irq = i2s_read_reg(dev->i2s_base, IMR(i)); 91 i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x30); 92 } 93 } else { 94 for (i = 0; i < (chan_nr / 2); i++) { 95 irq = i2s_read_reg(dev->i2s_base, IMR(i)); 96 i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x03); 97 } 98 } 99 } 100 101 static irqreturn_t i2s_irq_handler(int irq, void *dev_id) 102 { 103 struct dw_i2s_dev *dev = dev_id; 104 bool irq_valid = false; 105 u32 isr[4]; 106 int i; 107 108 for (i = 0; i < 4; i++) 109 isr[i] = i2s_read_reg(dev->i2s_base, ISR(i)); 110 111 i2s_clear_irqs(dev, SNDRV_PCM_STREAM_PLAYBACK); 112 i2s_clear_irqs(dev, SNDRV_PCM_STREAM_CAPTURE); 113 114 for (i = 0; i < 4; i++) { 115 /* 116 * Check if TX fifo is empty. If empty fill FIFO with samples 117 * NOTE: Only two channels supported 118 */ 119 if ((isr[i] & ISR_TXFE) && (i == 0) && dev->use_pio) { 120 dw_pcm_push_tx(dev); 121 irq_valid = true; 122 } 123 124 /* 125 * Data available. Retrieve samples from FIFO 126 * NOTE: Only two channels supported 127 */ 128 if ((isr[i] & ISR_RXDA) && (i == 0) && dev->use_pio) { 129 dw_pcm_pop_rx(dev); 130 irq_valid = true; 131 } 132 133 /* Error Handling: TX */ 134 if (isr[i] & ISR_TXFO) { 135 dev_err(dev->dev, "TX overrun (ch_id=%d)\n", i); 136 irq_valid = true; 137 } 138 139 /* Error Handling: TX */ 140 if (isr[i] & ISR_RXFO) { 141 dev_err(dev->dev, "RX overrun (ch_id=%d)\n", i); 142 irq_valid = true; 143 } 144 } 145 146 if (irq_valid) 147 return IRQ_HANDLED; 148 else 149 return IRQ_NONE; 150 } 151 152 static void i2s_start(struct dw_i2s_dev *dev, 153 struct snd_pcm_substream *substream) 154 { 155 struct i2s_clk_config_data *config = &dev->config; 156 157 i2s_write_reg(dev->i2s_base, IER, 1); 158 i2s_enable_irqs(dev, substream->stream, config->chan_nr); 159 160 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 161 i2s_write_reg(dev->i2s_base, ITER, 1); 162 else 163 i2s_write_reg(dev->i2s_base, IRER, 1); 164 165 i2s_write_reg(dev->i2s_base, CER, 1); 166 } 167 168 static void i2s_stop(struct dw_i2s_dev *dev, 169 struct snd_pcm_substream *substream) 170 { 171 172 i2s_clear_irqs(dev, substream->stream); 173 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 174 i2s_write_reg(dev->i2s_base, ITER, 0); 175 else 176 i2s_write_reg(dev->i2s_base, IRER, 0); 177 178 i2s_disable_irqs(dev, substream->stream, 8); 179 180 if (!dev->active) { 181 i2s_write_reg(dev->i2s_base, CER, 0); 182 i2s_write_reg(dev->i2s_base, IER, 0); 183 } 184 } 185 186 static int dw_i2s_startup(struct snd_pcm_substream *substream, 187 struct snd_soc_dai *cpu_dai) 188 { 189 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai); 190 union dw_i2s_snd_dma_data *dma_data = NULL; 191 192 if (!(dev->capability & DWC_I2S_RECORD) && 193 (substream->stream == SNDRV_PCM_STREAM_CAPTURE)) 194 return -EINVAL; 195 196 if (!(dev->capability & DWC_I2S_PLAY) && 197 (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)) 198 return -EINVAL; 199 200 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 201 dma_data = &dev->play_dma_data; 202 else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 203 dma_data = &dev->capture_dma_data; 204 205 snd_soc_dai_set_dma_data(cpu_dai, substream, (void *)dma_data); 206 207 return 0; 208 } 209 210 static void dw_i2s_config(struct dw_i2s_dev *dev, int stream) 211 { 212 u32 ch_reg; 213 struct i2s_clk_config_data *config = &dev->config; 214 215 216 i2s_disable_channels(dev, stream); 217 218 for (ch_reg = 0; ch_reg < (config->chan_nr / 2); ch_reg++) { 219 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 220 i2s_write_reg(dev->i2s_base, TCR(ch_reg), 221 dev->xfer_resolution); 222 i2s_write_reg(dev->i2s_base, TFCR(ch_reg), 223 dev->fifo_th - 1); 224 i2s_write_reg(dev->i2s_base, TER(ch_reg), 1); 225 } else { 226 i2s_write_reg(dev->i2s_base, RCR(ch_reg), 227 dev->xfer_resolution); 228 i2s_write_reg(dev->i2s_base, RFCR(ch_reg), 229 dev->fifo_th - 1); 230 i2s_write_reg(dev->i2s_base, RER(ch_reg), 1); 231 } 232 233 } 234 } 235 236 static int dw_i2s_hw_params(struct snd_pcm_substream *substream, 237 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) 238 { 239 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); 240 struct i2s_clk_config_data *config = &dev->config; 241 int ret; 242 243 switch (params_format(params)) { 244 case SNDRV_PCM_FORMAT_S16_LE: 245 config->data_width = 16; 246 dev->ccr = 0x00; 247 dev->xfer_resolution = 0x02; 248 break; 249 250 case SNDRV_PCM_FORMAT_S24_LE: 251 config->data_width = 24; 252 dev->ccr = 0x08; 253 dev->xfer_resolution = 0x04; 254 break; 255 256 case SNDRV_PCM_FORMAT_S32_LE: 257 config->data_width = 32; 258 dev->ccr = 0x10; 259 dev->xfer_resolution = 0x05; 260 break; 261 262 default: 263 dev_err(dev->dev, "designware-i2s: unsupported PCM fmt"); 264 return -EINVAL; 265 } 266 267 config->chan_nr = params_channels(params); 268 269 switch (config->chan_nr) { 270 case EIGHT_CHANNEL_SUPPORT: 271 case SIX_CHANNEL_SUPPORT: 272 case FOUR_CHANNEL_SUPPORT: 273 case TWO_CHANNEL_SUPPORT: 274 break; 275 default: 276 dev_err(dev->dev, "channel not supported\n"); 277 return -EINVAL; 278 } 279 280 dw_i2s_config(dev, substream->stream); 281 282 i2s_write_reg(dev->i2s_base, CCR, dev->ccr); 283 284 config->sample_rate = params_rate(params); 285 286 if (dev->capability & DW_I2S_MASTER) { 287 if (dev->i2s_clk_cfg) { 288 ret = dev->i2s_clk_cfg(config); 289 if (ret < 0) { 290 dev_err(dev->dev, "runtime audio clk config fail\n"); 291 return ret; 292 } 293 } else { 294 u32 bitclk = config->sample_rate * 295 config->data_width * 2; 296 297 ret = clk_set_rate(dev->clk, bitclk); 298 if (ret) { 299 dev_err(dev->dev, "Can't set I2S clock rate: %d\n", 300 ret); 301 return ret; 302 } 303 } 304 } 305 return 0; 306 } 307 308 static void dw_i2s_shutdown(struct snd_pcm_substream *substream, 309 struct snd_soc_dai *dai) 310 { 311 snd_soc_dai_set_dma_data(dai, substream, NULL); 312 } 313 314 static int dw_i2s_prepare(struct snd_pcm_substream *substream, 315 struct snd_soc_dai *dai) 316 { 317 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); 318 319 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 320 i2s_write_reg(dev->i2s_base, TXFFR, 1); 321 else 322 i2s_write_reg(dev->i2s_base, RXFFR, 1); 323 324 return 0; 325 } 326 327 static int dw_i2s_trigger(struct snd_pcm_substream *substream, 328 int cmd, struct snd_soc_dai *dai) 329 { 330 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); 331 int ret = 0; 332 333 switch (cmd) { 334 case SNDRV_PCM_TRIGGER_START: 335 case SNDRV_PCM_TRIGGER_RESUME: 336 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 337 dev->active++; 338 i2s_start(dev, substream); 339 break; 340 341 case SNDRV_PCM_TRIGGER_STOP: 342 case SNDRV_PCM_TRIGGER_SUSPEND: 343 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 344 dev->active--; 345 i2s_stop(dev, substream); 346 break; 347 default: 348 ret = -EINVAL; 349 break; 350 } 351 return ret; 352 } 353 354 static int dw_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) 355 { 356 struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai); 357 int ret = 0; 358 359 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 360 case SND_SOC_DAIFMT_BC_FC: 361 if (dev->capability & DW_I2S_SLAVE) 362 ret = 0; 363 else 364 ret = -EINVAL; 365 break; 366 case SND_SOC_DAIFMT_BP_FP: 367 if (dev->capability & DW_I2S_MASTER) 368 ret = 0; 369 else 370 ret = -EINVAL; 371 break; 372 case SND_SOC_DAIFMT_BC_FP: 373 case SND_SOC_DAIFMT_BP_FC: 374 ret = -EINVAL; 375 break; 376 default: 377 dev_dbg(dev->dev, "dwc : Invalid clock provider format\n"); 378 ret = -EINVAL; 379 break; 380 } 381 return ret; 382 } 383 384 static const struct snd_soc_dai_ops dw_i2s_dai_ops = { 385 .startup = dw_i2s_startup, 386 .shutdown = dw_i2s_shutdown, 387 .hw_params = dw_i2s_hw_params, 388 .prepare = dw_i2s_prepare, 389 .trigger = dw_i2s_trigger, 390 .set_fmt = dw_i2s_set_fmt, 391 }; 392 393 #ifdef CONFIG_PM 394 static int dw_i2s_runtime_suspend(struct device *dev) 395 { 396 struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev); 397 398 if (dw_dev->capability & DW_I2S_MASTER) 399 clk_disable(dw_dev->clk); 400 return 0; 401 } 402 403 static int dw_i2s_runtime_resume(struct device *dev) 404 { 405 struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev); 406 int ret; 407 408 if (dw_dev->capability & DW_I2S_MASTER) { 409 ret = clk_enable(dw_dev->clk); 410 if (ret) 411 return ret; 412 } 413 return 0; 414 } 415 416 static int dw_i2s_suspend(struct snd_soc_component *component) 417 { 418 struct dw_i2s_dev *dev = snd_soc_component_get_drvdata(component); 419 420 if (dev->capability & DW_I2S_MASTER) 421 clk_disable(dev->clk); 422 return 0; 423 } 424 425 static int dw_i2s_resume(struct snd_soc_component *component) 426 { 427 struct dw_i2s_dev *dev = snd_soc_component_get_drvdata(component); 428 struct snd_soc_dai *dai; 429 int stream, ret; 430 431 if (dev->capability & DW_I2S_MASTER) { 432 ret = clk_enable(dev->clk); 433 if (ret) 434 return ret; 435 } 436 437 for_each_component_dais(component, dai) { 438 for_each_pcm_streams(stream) 439 if (snd_soc_dai_stream_active(dai, stream)) 440 dw_i2s_config(dev, stream); 441 } 442 443 return 0; 444 } 445 446 #else 447 #define dw_i2s_suspend NULL 448 #define dw_i2s_resume NULL 449 #endif 450 451 static const struct snd_soc_component_driver dw_i2s_component = { 452 .name = "dw-i2s", 453 .suspend = dw_i2s_suspend, 454 .resume = dw_i2s_resume, 455 .legacy_dai_naming = 1, 456 }; 457 458 /* 459 * The following tables allow a direct lookup of various parameters 460 * defined in the I2S block's configuration in terms of sound system 461 * parameters. Each table is sized to the number of entries possible 462 * according to the number of configuration bits describing an I2S 463 * block parameter. 464 */ 465 466 /* Maximum bit resolution of a channel - not uniformly spaced */ 467 static const u32 fifo_width[COMP_MAX_WORDSIZE] = { 468 12, 16, 20, 24, 32, 0, 0, 0 469 }; 470 471 /* Width of (DMA) bus */ 472 static const u32 bus_widths[COMP_MAX_DATA_WIDTH] = { 473 DMA_SLAVE_BUSWIDTH_1_BYTE, 474 DMA_SLAVE_BUSWIDTH_2_BYTES, 475 DMA_SLAVE_BUSWIDTH_4_BYTES, 476 DMA_SLAVE_BUSWIDTH_UNDEFINED 477 }; 478 479 /* PCM format to support channel resolution */ 480 static const u32 formats[COMP_MAX_WORDSIZE] = { 481 SNDRV_PCM_FMTBIT_S16_LE, 482 SNDRV_PCM_FMTBIT_S16_LE, 483 SNDRV_PCM_FMTBIT_S24_LE, 484 SNDRV_PCM_FMTBIT_S24_LE, 485 SNDRV_PCM_FMTBIT_S32_LE, 486 0, 487 0, 488 0 489 }; 490 491 static int dw_configure_dai(struct dw_i2s_dev *dev, 492 struct snd_soc_dai_driver *dw_i2s_dai, 493 unsigned int rates) 494 { 495 /* 496 * Read component parameter registers to extract 497 * the I2S block's configuration. 498 */ 499 u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1); 500 u32 comp2 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp2); 501 u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1)); 502 u32 idx; 503 504 if (dev->capability & DWC_I2S_RECORD && 505 dev->quirks & DW_I2S_QUIRK_COMP_PARAM1) 506 comp1 = comp1 & ~BIT(5); 507 508 if (dev->capability & DWC_I2S_PLAY && 509 dev->quirks & DW_I2S_QUIRK_COMP_PARAM1) 510 comp1 = comp1 & ~BIT(6); 511 512 if (COMP1_TX_ENABLED(comp1)) { 513 dev_dbg(dev->dev, " designware: play supported\n"); 514 idx = COMP1_TX_WORDSIZE_0(comp1); 515 if (WARN_ON(idx >= ARRAY_SIZE(formats))) 516 return -EINVAL; 517 if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) 518 idx = 1; 519 dw_i2s_dai->playback.channels_min = MIN_CHANNEL_NUM; 520 dw_i2s_dai->playback.channels_max = 521 1 << (COMP1_TX_CHANNELS(comp1) + 1); 522 dw_i2s_dai->playback.formats = formats[idx]; 523 dw_i2s_dai->playback.rates = rates; 524 } 525 526 if (COMP1_RX_ENABLED(comp1)) { 527 dev_dbg(dev->dev, "designware: record supported\n"); 528 idx = COMP2_RX_WORDSIZE_0(comp2); 529 if (WARN_ON(idx >= ARRAY_SIZE(formats))) 530 return -EINVAL; 531 if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) 532 idx = 1; 533 dw_i2s_dai->capture.channels_min = MIN_CHANNEL_NUM; 534 dw_i2s_dai->capture.channels_max = 535 1 << (COMP1_RX_CHANNELS(comp1) + 1); 536 dw_i2s_dai->capture.formats = formats[idx]; 537 dw_i2s_dai->capture.rates = rates; 538 } 539 540 if (COMP1_MODE_EN(comp1)) { 541 dev_dbg(dev->dev, "designware: i2s master mode supported\n"); 542 dev->capability |= DW_I2S_MASTER; 543 } else { 544 dev_dbg(dev->dev, "designware: i2s slave mode supported\n"); 545 dev->capability |= DW_I2S_SLAVE; 546 } 547 548 dev->fifo_th = fifo_depth / 2; 549 return 0; 550 } 551 552 static int dw_configure_dai_by_pd(struct dw_i2s_dev *dev, 553 struct snd_soc_dai_driver *dw_i2s_dai, 554 struct resource *res, 555 const struct i2s_platform_data *pdata) 556 { 557 u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1); 558 u32 idx = COMP1_APB_DATA_WIDTH(comp1); 559 int ret; 560 561 if (WARN_ON(idx >= ARRAY_SIZE(bus_widths))) 562 return -EINVAL; 563 564 ret = dw_configure_dai(dev, dw_i2s_dai, pdata->snd_rates); 565 if (ret < 0) 566 return ret; 567 568 if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) 569 idx = 1; 570 /* Set DMA slaves info */ 571 dev->play_dma_data.pd.data = pdata->play_dma_data; 572 dev->capture_dma_data.pd.data = pdata->capture_dma_data; 573 dev->play_dma_data.pd.addr = res->start + I2S_TXDMA; 574 dev->capture_dma_data.pd.addr = res->start + I2S_RXDMA; 575 dev->play_dma_data.pd.max_burst = 16; 576 dev->capture_dma_data.pd.max_burst = 16; 577 dev->play_dma_data.pd.addr_width = bus_widths[idx]; 578 dev->capture_dma_data.pd.addr_width = bus_widths[idx]; 579 dev->play_dma_data.pd.filter = pdata->filter; 580 dev->capture_dma_data.pd.filter = pdata->filter; 581 582 return 0; 583 } 584 585 static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev, 586 struct snd_soc_dai_driver *dw_i2s_dai, 587 struct resource *res) 588 { 589 u32 comp1 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_1); 590 u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2); 591 u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1)); 592 u32 idx = COMP1_APB_DATA_WIDTH(comp1); 593 u32 idx2; 594 int ret; 595 596 if (WARN_ON(idx >= ARRAY_SIZE(bus_widths))) 597 return -EINVAL; 598 599 ret = dw_configure_dai(dev, dw_i2s_dai, SNDRV_PCM_RATE_8000_192000); 600 if (ret < 0) 601 return ret; 602 603 if (COMP1_TX_ENABLED(comp1)) { 604 idx2 = COMP1_TX_WORDSIZE_0(comp1); 605 606 dev->capability |= DWC_I2S_PLAY; 607 dev->play_dma_data.dt.addr = res->start + I2S_TXDMA; 608 dev->play_dma_data.dt.addr_width = bus_widths[idx]; 609 dev->play_dma_data.dt.fifo_size = fifo_depth * 610 (fifo_width[idx2]) >> 8; 611 dev->play_dma_data.dt.maxburst = 16; 612 } 613 if (COMP1_RX_ENABLED(comp1)) { 614 idx2 = COMP2_RX_WORDSIZE_0(comp2); 615 616 dev->capability |= DWC_I2S_RECORD; 617 dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA; 618 dev->capture_dma_data.dt.addr_width = bus_widths[idx]; 619 dev->capture_dma_data.dt.fifo_size = fifo_depth * 620 (fifo_width[idx2] >> 8); 621 dev->capture_dma_data.dt.maxburst = 16; 622 } 623 624 return 0; 625 626 } 627 628 static int dw_i2s_probe(struct platform_device *pdev) 629 { 630 const struct i2s_platform_data *pdata = pdev->dev.platform_data; 631 struct dw_i2s_dev *dev; 632 struct resource *res; 633 int ret, irq; 634 struct snd_soc_dai_driver *dw_i2s_dai; 635 const char *clk_id; 636 637 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); 638 if (!dev) 639 return -ENOMEM; 640 641 dw_i2s_dai = devm_kzalloc(&pdev->dev, sizeof(*dw_i2s_dai), GFP_KERNEL); 642 if (!dw_i2s_dai) 643 return -ENOMEM; 644 645 dw_i2s_dai->ops = &dw_i2s_dai_ops; 646 647 dev->i2s_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 648 if (IS_ERR(dev->i2s_base)) 649 return PTR_ERR(dev->i2s_base); 650 651 dev->dev = &pdev->dev; 652 653 irq = platform_get_irq_optional(pdev, 0); 654 if (irq >= 0) { 655 ret = devm_request_irq(&pdev->dev, irq, i2s_irq_handler, 0, 656 pdev->name, dev); 657 if (ret < 0) { 658 dev_err(&pdev->dev, "failed to request irq\n"); 659 return ret; 660 } 661 } 662 663 dev->i2s_reg_comp1 = I2S_COMP_PARAM_1; 664 dev->i2s_reg_comp2 = I2S_COMP_PARAM_2; 665 if (pdata) { 666 dev->capability = pdata->cap; 667 clk_id = NULL; 668 dev->quirks = pdata->quirks; 669 if (dev->quirks & DW_I2S_QUIRK_COMP_REG_OFFSET) { 670 dev->i2s_reg_comp1 = pdata->i2s_reg_comp1; 671 dev->i2s_reg_comp2 = pdata->i2s_reg_comp2; 672 } 673 ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata); 674 } else { 675 clk_id = "i2sclk"; 676 ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res); 677 } 678 if (ret < 0) 679 return ret; 680 681 if (dev->capability & DW_I2S_MASTER) { 682 if (pdata) { 683 dev->i2s_clk_cfg = pdata->i2s_clk_cfg; 684 if (!dev->i2s_clk_cfg) { 685 dev_err(&pdev->dev, "no clock configure method\n"); 686 return -ENODEV; 687 } 688 } 689 dev->clk = devm_clk_get(&pdev->dev, clk_id); 690 691 if (IS_ERR(dev->clk)) 692 return PTR_ERR(dev->clk); 693 694 ret = clk_prepare_enable(dev->clk); 695 if (ret < 0) 696 return ret; 697 } 698 699 dev_set_drvdata(&pdev->dev, dev); 700 ret = devm_snd_soc_register_component(&pdev->dev, &dw_i2s_component, 701 dw_i2s_dai, 1); 702 if (ret != 0) { 703 dev_err(&pdev->dev, "not able to register dai\n"); 704 goto err_clk_disable; 705 } 706 707 if (!pdata) { 708 if (irq >= 0) { 709 ret = dw_pcm_register(pdev); 710 dev->use_pio = true; 711 } else { 712 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 713 0); 714 dev->use_pio = false; 715 } 716 717 if (ret) { 718 dev_err(&pdev->dev, "could not register pcm: %d\n", 719 ret); 720 goto err_clk_disable; 721 } 722 } 723 724 pm_runtime_enable(&pdev->dev); 725 return 0; 726 727 err_clk_disable: 728 if (dev->capability & DW_I2S_MASTER) 729 clk_disable_unprepare(dev->clk); 730 return ret; 731 } 732 733 static int dw_i2s_remove(struct platform_device *pdev) 734 { 735 struct dw_i2s_dev *dev = dev_get_drvdata(&pdev->dev); 736 737 if (dev->capability & DW_I2S_MASTER) 738 clk_disable_unprepare(dev->clk); 739 740 pm_runtime_disable(&pdev->dev); 741 return 0; 742 } 743 744 #ifdef CONFIG_OF 745 static const struct of_device_id dw_i2s_of_match[] = { 746 { .compatible = "snps,designware-i2s", }, 747 {}, 748 }; 749 750 MODULE_DEVICE_TABLE(of, dw_i2s_of_match); 751 #endif 752 753 static const struct dev_pm_ops dwc_pm_ops = { 754 SET_RUNTIME_PM_OPS(dw_i2s_runtime_suspend, dw_i2s_runtime_resume, NULL) 755 }; 756 757 static struct platform_driver dw_i2s_driver = { 758 .probe = dw_i2s_probe, 759 .remove = dw_i2s_remove, 760 .driver = { 761 .name = "designware-i2s", 762 .of_match_table = of_match_ptr(dw_i2s_of_match), 763 .pm = &dwc_pm_ops, 764 }, 765 }; 766 767 module_platform_driver(dw_i2s_driver); 768 769 MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>"); 770 MODULE_DESCRIPTION("DESIGNWARE I2S SoC Interface"); 771 MODULE_LICENSE("GPL"); 772 MODULE_ALIAS("platform:designware_i2s"); 773