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