sound/soc/dwc/dwc-i2s.c

   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");