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_MASTER_MASK) {
 360         case SND_SOC_DAIFMT_CBM_CFM:
 361                 if (dev->capability & DW_I2S_SLAVE)
 362                         ret = 0;
 363                 else
 364                         ret = -EINVAL;
 365                 break;
 366         case SND_SOC_DAIFMT_CBS_CFS:
 367                 if (dev->capability & DW_I2S_MASTER)
 368                         ret = 0;
 369                 else
 370                         ret = -EINVAL;
 371                 break;
 372         case SND_SOC_DAIFMT_CBM_CFS:
 373         case SND_SOC_DAIFMT_CBS_CFM:
 374                 ret = -EINVAL;
 375                 break;
 376         default:
 377                 dev_dbg(dev->dev, "dwc : Invalid master/slave format\n");
 378                 ret = -EINVAL;
 379                 break;
 380         }
 381         return ret;
 382 }
 383
 384 static 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 static const struct snd_soc_component_driver dw_i2s_component = {
 394         .name           = "dw-i2s",
 395 };
 396
 397 #ifdef CONFIG_PM
 398 static int dw_i2s_runtime_suspend(struct device *dev)
 399 {
 400         struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev);
 401
 402         if (dw_dev->capability & DW_I2S_MASTER)
 403                 clk_disable(dw_dev->clk);
 404         return 0;
 405 }
 406
 407 static int dw_i2s_runtime_resume(struct device *dev)
 408 {
 409         struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev);
 410
 411         if (dw_dev->capability & DW_I2S_MASTER)
 412                 clk_enable(dw_dev->clk);
 413         return 0;
 414 }
 415
 416 static int dw_i2s_suspend(struct snd_soc_dai *dai)
 417 {
 418         struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
 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_dai *dai)
 426 {
 427         struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
 428
 429         if (dev->capability & DW_I2S_MASTER)
 430                 clk_enable(dev->clk);
 431
 432         if (dai->playback_active)
 433                 dw_i2s_config(dev, SNDRV_PCM_STREAM_PLAYBACK);
 434         if (dai->capture_active)
 435                 dw_i2s_config(dev, SNDRV_PCM_STREAM_CAPTURE);
 436         return 0;
 437 }
 438
 439 #else
 440 #define dw_i2s_suspend  NULL
 441 #define dw_i2s_resume   NULL
 442 #endif
 443
 444 /*
 445  * The following tables allow a direct lookup of various parameters
 446  * defined in the I2S block's configuration in terms of sound system
 447  * parameters.  Each table is sized to the number of entries possible
 448  * according to the number of configuration bits describing an I2S
 449  * block parameter.
 450  */
 451
 452 /* Maximum bit resolution of a channel - not uniformly spaced */
 453 static const u32 fifo_width[COMP_MAX_WORDSIZE] = {
 454         12, 16, 20, 24, 32, 0, 0, 0
 455 };
 456
 457 /* Width of (DMA) bus */
 458 static const u32 bus_widths[COMP_MAX_DATA_WIDTH] = {
 459         DMA_SLAVE_BUSWIDTH_1_BYTE,
 460         DMA_SLAVE_BUSWIDTH_2_BYTES,
 461         DMA_SLAVE_BUSWIDTH_4_BYTES,
 462         DMA_SLAVE_BUSWIDTH_UNDEFINED
 463 };
 464
 465 /* PCM format to support channel resolution */
 466 static const u32 formats[COMP_MAX_WORDSIZE] = {
 467         SNDRV_PCM_FMTBIT_S16_LE,
 468         SNDRV_PCM_FMTBIT_S16_LE,
 469         SNDRV_PCM_FMTBIT_S24_LE,
 470         SNDRV_PCM_FMTBIT_S24_LE,
 471         SNDRV_PCM_FMTBIT_S32_LE,
 472         0,
 473         0,
 474         0
 475 };
 476
 477 static int dw_configure_dai(struct dw_i2s_dev *dev,
 478                                    struct snd_soc_dai_driver *dw_i2s_dai,
 479                                    unsigned int rates)
 480 {
 481         /*
 482          * Read component parameter registers to extract
 483          * the I2S block's configuration.
 484          */
 485         u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1);
 486         u32 comp2 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp2);
 487         u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1));
 488         u32 idx;
 489
 490         if (dev->capability & DWC_I2S_RECORD &&
 491                         dev->quirks & DW_I2S_QUIRK_COMP_PARAM1)
 492                 comp1 = comp1 & ~BIT(5);
 493
 494         if (COMP1_TX_ENABLED(comp1)) {
 495                 dev_dbg(dev->dev, " designware: play supported\n");
 496                 idx = COMP1_TX_WORDSIZE_0(comp1);
 497                 if (WARN_ON(idx >= ARRAY_SIZE(formats)))
 498                         return -EINVAL;
 499                 dw_i2s_dai->playback.channels_min = MIN_CHANNEL_NUM;
 500                 dw_i2s_dai->playback.channels_max =
 501                                 1 << (COMP1_TX_CHANNELS(comp1) + 1);
 502                 dw_i2s_dai->playback.formats = formats[idx];
 503                 dw_i2s_dai->playback.rates = rates;
 504         }
 505
 506         if (COMP1_RX_ENABLED(comp1)) {
 507                 dev_dbg(dev->dev, "designware: record supported\n");
 508                 idx = COMP2_RX_WORDSIZE_0(comp2);
 509                 if (WARN_ON(idx >= ARRAY_SIZE(formats)))
 510                         return -EINVAL;
 511                 dw_i2s_dai->capture.channels_min = MIN_CHANNEL_NUM;
 512                 dw_i2s_dai->capture.channels_max =
 513                                 1 << (COMP1_RX_CHANNELS(comp1) + 1);
 514                 dw_i2s_dai->capture.formats = formats[idx];
 515                 dw_i2s_dai->capture.rates = rates;
 516         }
 517
 518         if (COMP1_MODE_EN(comp1)) {
 519                 dev_dbg(dev->dev, "designware: i2s master mode supported\n");
 520                 dev->capability |= DW_I2S_MASTER;
 521         } else {
 522                 dev_dbg(dev->dev, "designware: i2s slave mode supported\n");
 523                 dev->capability |= DW_I2S_SLAVE;
 524         }
 525
 526         dev->fifo_th = fifo_depth / 2;
 527         return 0;
 528 }
 529
 530 static int dw_configure_dai_by_pd(struct dw_i2s_dev *dev,
 531                                    struct snd_soc_dai_driver *dw_i2s_dai,
 532                                    struct resource *res,
 533                                    const struct i2s_platform_data *pdata)
 534 {
 535         u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1);
 536         u32 idx = COMP1_APB_DATA_WIDTH(comp1);
 537         int ret;
 538
 539         if (WARN_ON(idx >= ARRAY_SIZE(bus_widths)))
 540                 return -EINVAL;
 541
 542         ret = dw_configure_dai(dev, dw_i2s_dai, pdata->snd_rates);
 543         if (ret < 0)
 544                 return ret;
 545
 546         /* Set DMA slaves info */
 547         dev->play_dma_data.pd.data = pdata->play_dma_data;
 548         dev->capture_dma_data.pd.data = pdata->capture_dma_data;
 549         dev->play_dma_data.pd.addr = res->start + I2S_TXDMA;
 550         dev->capture_dma_data.pd.addr = res->start + I2S_RXDMA;
 551         dev->play_dma_data.pd.max_burst = 16;
 552         dev->capture_dma_data.pd.max_burst = 16;
 553         dev->play_dma_data.pd.addr_width = bus_widths[idx];
 554         dev->capture_dma_data.pd.addr_width = bus_widths[idx];
 555         dev->play_dma_data.pd.filter = pdata->filter;
 556         dev->capture_dma_data.pd.filter = pdata->filter;
 557
 558         return 0;
 559 }
 560
 561 static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev,
 562                                    struct snd_soc_dai_driver *dw_i2s_dai,
 563                                    struct resource *res)
 564 {
 565         u32 comp1 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_1);
 566         u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2);
 567         u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1));
 568         u32 idx = COMP1_APB_DATA_WIDTH(comp1);
 569         u32 idx2;
 570         int ret;
 571
 572         if (WARN_ON(idx >= ARRAY_SIZE(bus_widths)))
 573                 return -EINVAL;
 574
 575         ret = dw_configure_dai(dev, dw_i2s_dai, SNDRV_PCM_RATE_8000_192000);
 576         if (ret < 0)
 577                 return ret;
 578
 579         if (COMP1_TX_ENABLED(comp1)) {
 580                 idx2 = COMP1_TX_WORDSIZE_0(comp1);
 581
 582                 dev->capability |= DWC_I2S_PLAY;
 583                 dev->play_dma_data.dt.addr = res->start + I2S_TXDMA;
 584                 dev->play_dma_data.dt.addr_width = bus_widths[idx];
 585                 dev->play_dma_data.dt.fifo_size = fifo_depth *
 586                         (fifo_width[idx2]) >> 8;
 587                 dev->play_dma_data.dt.maxburst = 16;
 588         }
 589         if (COMP1_RX_ENABLED(comp1)) {
 590                 idx2 = COMP2_RX_WORDSIZE_0(comp2);
 591
 592                 dev->capability |= DWC_I2S_RECORD;
 593                 dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA;
 594                 dev->capture_dma_data.dt.addr_width = bus_widths[idx];
 595                 dev->capture_dma_data.dt.fifo_size = fifo_depth *
 596                         (fifo_width[idx2] >> 8);
 597                 dev->capture_dma_data.dt.maxburst = 16;
 598         }
 599
 600         return 0;
 601
 602 }
 603
 604 static int dw_i2s_probe(struct platform_device *pdev)
 605 {
 606         const struct i2s_platform_data *pdata = pdev->dev.platform_data;
 607         struct dw_i2s_dev *dev;
 608         struct resource *res;
 609         int ret, irq;
 610         struct snd_soc_dai_driver *dw_i2s_dai;
 611         const char *clk_id;
 612
 613         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 614         if (!dev) {
 615                 dev_warn(&pdev->dev, "kzalloc fail\n");
 616                 return -ENOMEM;
 617         }
 618
 619         dw_i2s_dai = devm_kzalloc(&pdev->dev, sizeof(*dw_i2s_dai), GFP_KERNEL);
 620         if (!dw_i2s_dai)
 621                 return -ENOMEM;
 622
 623         dw_i2s_dai->ops = &dw_i2s_dai_ops;
 624         dw_i2s_dai->suspend = dw_i2s_suspend;
 625         dw_i2s_dai->resume = dw_i2s_resume;
 626
 627         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 628         dev->i2s_base = devm_ioremap_resource(&pdev->dev, res);
 629         if (IS_ERR(dev->i2s_base))
 630                 return PTR_ERR(dev->i2s_base);
 631
 632         dev->dev = &pdev->dev;
 633
 634         irq = platform_get_irq(pdev, 0);
 635         if (irq >= 0) {
 636                 ret = devm_request_irq(&pdev->dev, irq, i2s_irq_handler, 0,
 637                                 pdev->name, dev);
 638                 if (ret < 0) {
 639                         dev_err(&pdev->dev, "failed to request irq\n");
 640                         return ret;
 641                 }
 642         }
 643
 644         dev->i2s_reg_comp1 = I2S_COMP_PARAM_1;
 645         dev->i2s_reg_comp2 = I2S_COMP_PARAM_2;
 646         if (pdata) {
 647                 dev->capability = pdata->cap;
 648                 clk_id = NULL;
 649                 dev->quirks = pdata->quirks;
 650                 if (dev->quirks & DW_I2S_QUIRK_COMP_REG_OFFSET) {
 651                         dev->i2s_reg_comp1 = pdata->i2s_reg_comp1;
 652                         dev->i2s_reg_comp2 = pdata->i2s_reg_comp2;
 653                 }
 654                 ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata);
 655         } else {
 656                 clk_id = "i2sclk";
 657                 ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res);
 658         }
 659         if (ret < 0)
 660                 return ret;
 661
 662         if (dev->capability & DW_I2S_MASTER) {
 663                 if (pdata) {
 664                         dev->i2s_clk_cfg = pdata->i2s_clk_cfg;
 665                         if (!dev->i2s_clk_cfg) {
 666                                 dev_err(&pdev->dev, "no clock configure method\n");
 667                                 return -ENODEV;
 668                         }
 669                 }
 670                 dev->clk = devm_clk_get(&pdev->dev, clk_id);
 671
 672                 if (IS_ERR(dev->clk))
 673                         return PTR_ERR(dev->clk);
 674
 675                 ret = clk_prepare_enable(dev->clk);
 676                 if (ret < 0)
 677                         return ret;
 678         }
 679
 680         dev_set_drvdata(&pdev->dev, dev);
 681         ret = devm_snd_soc_register_component(&pdev->dev, &dw_i2s_component,
 682                                          dw_i2s_dai, 1);
 683         if (ret != 0) {
 684                 dev_err(&pdev->dev, "not able to register dai\n");
 685                 goto err_clk_disable;
 686         }
 687
 688         if (!pdata) {
 689                 if (irq >= 0) {
 690                         ret = dw_pcm_register(pdev);
 691                         dev->use_pio = true;
 692                 } else {
 693                         ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL,
 694                                         0);
 695                         dev->use_pio = false;
 696                 }
 697
 698                 if (ret) {
 699                         dev_err(&pdev->dev, "could not register pcm: %d\n",
 700                                         ret);
 701                         goto err_clk_disable;
 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");