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
  28 /* common register for all channel */
  29 #define IER             0x000
  30 #define IRER            0x004
  31 #define ITER            0x008
  32 #define CER             0x00C
  33 #define CCR             0x010
  34 #define RXFFR           0x014
  35 #define TXFFR           0x018
  36
  37 /* I2STxRxRegisters for all channels */
  38 #define LRBR_LTHR(x)    (0x40 * x + 0x020)
  39 #define RRBR_RTHR(x)    (0x40 * x + 0x024)
  40 #define RER(x)          (0x40 * x + 0x028)
  41 #define TER(x)          (0x40 * x + 0x02C)
  42 #define RCR(x)          (0x40 * x + 0x030)
  43 #define TCR(x)          (0x40 * x + 0x034)
  44 #define ISR(x)          (0x40 * x + 0x038)
  45 #define IMR(x)          (0x40 * x + 0x03C)
  46 #define ROR(x)          (0x40 * x + 0x040)
  47 #define TOR(x)          (0x40 * x + 0x044)
  48 #define RFCR(x)         (0x40 * x + 0x048)
  49 #define TFCR(x)         (0x40 * x + 0x04C)
  50 #define RFF(x)          (0x40 * x + 0x050)
  51 #define TFF(x)          (0x40 * x + 0x054)
  52
  53 /* I2SCOMPRegisters */
  54 #define I2S_COMP_PARAM_2        0x01F0
  55 #define I2S_COMP_PARAM_1        0x01F4
  56 #define I2S_COMP_VERSION        0x01F8
  57 #define I2S_COMP_TYPE           0x01FC
  58
  59 /*
  60  * Component parameter register fields - define the I2S block's
  61  * configuration.
  62  */
  63 #define COMP1_TX_WORDSIZE_3(r)  (((r) & GENMASK(27, 25)) >> 25)
  64 #define COMP1_TX_WORDSIZE_2(r)  (((r) & GENMASK(24, 22)) >> 22)
  65 #define COMP1_TX_WORDSIZE_1(r)  (((r) & GENMASK(21, 19)) >> 19)
  66 #define COMP1_TX_WORDSIZE_0(r)  (((r) & GENMASK(18, 16)) >> 16)
  67 #define COMP1_TX_CHANNELS(r)    (((r) & GENMASK(10, 9)) >> 9)
  68 #define COMP1_RX_CHANNELS(r)    (((r) & GENMASK(8, 7)) >> 7)
  69 #define COMP1_RX_ENABLED(r)     (((r) & BIT(6)) >> 6)
  70 #define COMP1_TX_ENABLED(r)     (((r) & BIT(5)) >> 5)
  71 #define COMP1_MODE_EN(r)        (((r) & BIT(4)) >> 4)
  72 #define COMP1_FIFO_DEPTH_GLOBAL(r)      (((r) & GENMASK(3, 2)) >> 2)
  73 #define COMP1_APB_DATA_WIDTH(r) (((r) & GENMASK(1, 0)) >> 0)
  74
  75 #define COMP2_RX_WORDSIZE_3(r)  (((r) & GENMASK(12, 10)) >> 10)
  76 #define COMP2_RX_WORDSIZE_2(r)  (((r) & GENMASK(9, 7)) >> 7)
  77 #define COMP2_RX_WORDSIZE_1(r)  (((r) & GENMASK(5, 3)) >> 3)
  78 #define COMP2_RX_WORDSIZE_0(r)  (((r) & GENMASK(2, 0)) >> 0)
  79
  80 /* Number of entries in WORDSIZE and DATA_WIDTH parameter registers */
  81 #define COMP_MAX_WORDSIZE       (1 << 3)
  82 #define COMP_MAX_DATA_WIDTH     (1 << 2)
  83
  84 #define MAX_CHANNEL_NUM         8
  85 #define MIN_CHANNEL_NUM         2
  86
  87 union dw_i2s_snd_dma_data {
  88         struct i2s_dma_data pd;
  89         struct snd_dmaengine_dai_dma_data dt;
  90 };
  91
  92 struct dw_i2s_dev {
  93         void __iomem *i2s_base;
  94         struct clk *clk;
  95         int active;
  96         unsigned int capability;
  97         unsigned int quirks;
  98         unsigned int i2s_reg_comp1;
  99         unsigned int i2s_reg_comp2;
 100         struct device *dev;
 101         u32 ccr;
 102         u32 xfer_resolution;
 103
 104         /* data related to DMA transfers b/w i2s and DMAC */
 105         union dw_i2s_snd_dma_data play_dma_data;
 106         union dw_i2s_snd_dma_data capture_dma_data;
 107         struct i2s_clk_config_data config;
 108         int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
 109 };
 110
 111 static inline void i2s_write_reg(void __iomem *io_base, int reg, u32 val)
 112 {
 113         writel(val, io_base + reg);
 114 }
 115
 116 static inline u32 i2s_read_reg(void __iomem *io_base, int reg)
 117 {
 118         return readl(io_base + reg);
 119 }
 120
 121 static inline void i2s_disable_channels(struct dw_i2s_dev *dev, u32 stream)
 122 {
 123         u32 i = 0;
 124
 125         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 126                 for (i = 0; i < 4; i++)
 127                         i2s_write_reg(dev->i2s_base, TER(i), 0);
 128         } else {
 129                 for (i = 0; i < 4; i++)
 130                         i2s_write_reg(dev->i2s_base, RER(i), 0);
 131         }
 132 }
 133
 134 static inline void i2s_clear_irqs(struct dw_i2s_dev *dev, u32 stream)
 135 {
 136         u32 i = 0;
 137
 138         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 139                 for (i = 0; i < 4; i++)
 140                         i2s_read_reg(dev->i2s_base, TOR(i));
 141         } else {
 142                 for (i = 0; i < 4; i++)
 143                         i2s_read_reg(dev->i2s_base, ROR(i));
 144         }
 145 }
 146
 147 static void i2s_start(struct dw_i2s_dev *dev,
 148                       struct snd_pcm_substream *substream)
 149 {
 150         u32 i, irq;
 151         i2s_write_reg(dev->i2s_base, IER, 1);
 152
 153         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 154                 for (i = 0; i < 4; i++) {
 155                         irq = i2s_read_reg(dev->i2s_base, IMR(i));
 156                         i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x30);
 157                 }
 158                 i2s_write_reg(dev->i2s_base, ITER, 1);
 159         } else {
 160                 for (i = 0; i < 4; i++) {
 161                         irq = i2s_read_reg(dev->i2s_base, IMR(i));
 162                         i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x03);
 163                 }
 164                 i2s_write_reg(dev->i2s_base, IRER, 1);
 165         }
 166
 167         i2s_write_reg(dev->i2s_base, CER, 1);
 168 }
 169
 170 static void i2s_stop(struct dw_i2s_dev *dev,
 171                 struct snd_pcm_substream *substream)
 172 {
 173         u32 i = 0, irq;
 174
 175         i2s_clear_irqs(dev, substream->stream);
 176         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 177                 i2s_write_reg(dev->i2s_base, ITER, 0);
 178
 179                 for (i = 0; i < 4; i++) {
 180                         irq = i2s_read_reg(dev->i2s_base, IMR(i));
 181                         i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x30);
 182                 }
 183         } else {
 184                 i2s_write_reg(dev->i2s_base, IRER, 0);
 185
 186                 for (i = 0; i < 4; i++) {
 187                         irq = i2s_read_reg(dev->i2s_base, IMR(i));
 188                         i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x03);
 189                 }
 190         }
 191
 192         if (!dev->active) {
 193                 i2s_write_reg(dev->i2s_base, CER, 0);
 194                 i2s_write_reg(dev->i2s_base, IER, 0);
 195         }
 196 }
 197
 198 static int dw_i2s_startup(struct snd_pcm_substream *substream,
 199                 struct snd_soc_dai *cpu_dai)
 200 {
 201         struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
 202         union dw_i2s_snd_dma_data *dma_data = NULL;
 203
 204         if (!(dev->capability & DWC_I2S_RECORD) &&
 205                         (substream->stream == SNDRV_PCM_STREAM_CAPTURE))
 206                 return -EINVAL;
 207
 208         if (!(dev->capability & DWC_I2S_PLAY) &&
 209                         (substream->stream == SNDRV_PCM_STREAM_PLAYBACK))
 210                 return -EINVAL;
 211
 212         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 213                 dma_data = &dev->play_dma_data;
 214         else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 215                 dma_data = &dev->capture_dma_data;
 216
 217         snd_soc_dai_set_dma_data(cpu_dai, substream, (void *)dma_data);
 218
 219         return 0;
 220 }
 221
 222 static void dw_i2s_config(struct dw_i2s_dev *dev, int stream)
 223 {
 224         u32 ch_reg, irq;
 225         struct i2s_clk_config_data *config = &dev->config;
 226
 227
 228         i2s_disable_channels(dev, stream);
 229
 230         for (ch_reg = 0; ch_reg < (config->chan_nr / 2); ch_reg++) {
 231                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 232                         i2s_write_reg(dev->i2s_base, TCR(ch_reg),
 233                                       dev->xfer_resolution);
 234                         i2s_write_reg(dev->i2s_base, TFCR(ch_reg), 0x02);
 235                         irq = i2s_read_reg(dev->i2s_base, IMR(ch_reg));
 236                         i2s_write_reg(dev->i2s_base, IMR(ch_reg), irq & ~0x30);
 237                         i2s_write_reg(dev->i2s_base, TER(ch_reg), 1);
 238                 } else {
 239                         i2s_write_reg(dev->i2s_base, RCR(ch_reg),
 240                                       dev->xfer_resolution);
 241                         i2s_write_reg(dev->i2s_base, RFCR(ch_reg), 0x07);
 242                         irq = i2s_read_reg(dev->i2s_base, IMR(ch_reg));
 243                         i2s_write_reg(dev->i2s_base, IMR(ch_reg), irq & ~0x03);
 244                         i2s_write_reg(dev->i2s_base, RER(ch_reg), 1);
 245                 }
 246
 247         }
 248 }
 249
 250 static int dw_i2s_hw_params(struct snd_pcm_substream *substream,
 251                 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 252 {
 253         struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
 254         struct i2s_clk_config_data *config = &dev->config;
 255         int ret;
 256
 257         switch (params_format(params)) {
 258         case SNDRV_PCM_FORMAT_S16_LE:
 259                 config->data_width = 16;
 260                 dev->ccr = 0x00;
 261                 dev->xfer_resolution = 0x02;
 262                 break;
 263
 264         case SNDRV_PCM_FORMAT_S24_LE:
 265                 config->data_width = 24;
 266                 dev->ccr = 0x08;
 267                 dev->xfer_resolution = 0x04;
 268                 break;
 269
 270         case SNDRV_PCM_FORMAT_S32_LE:
 271                 config->data_width = 32;
 272                 dev->ccr = 0x10;
 273                 dev->xfer_resolution = 0x05;
 274                 break;
 275
 276         default:
 277                 dev_err(dev->dev, "designware-i2s: unsuppted PCM fmt");
 278                 return -EINVAL;
 279         }
 280
 281         config->chan_nr = params_channels(params);
 282
 283         switch (config->chan_nr) {
 284         case EIGHT_CHANNEL_SUPPORT:
 285         case SIX_CHANNEL_SUPPORT:
 286         case FOUR_CHANNEL_SUPPORT:
 287         case TWO_CHANNEL_SUPPORT:
 288                 break;
 289         default:
 290                 dev_err(dev->dev, "channel not supported\n");
 291                 return -EINVAL;
 292         }
 293
 294         dw_i2s_config(dev, substream->stream);
 295
 296         i2s_write_reg(dev->i2s_base, CCR, dev->ccr);
 297
 298         config->sample_rate = params_rate(params);
 299
 300         if (dev->capability & DW_I2S_MASTER) {
 301                 if (dev->i2s_clk_cfg) {
 302                         ret = dev->i2s_clk_cfg(config);
 303                         if (ret < 0) {
 304                                 dev_err(dev->dev, "runtime audio clk config fail\n");
 305                                 return ret;
 306                         }
 307                 } else {
 308                         u32 bitclk = config->sample_rate *
 309                                         config->data_width * 2;
 310
 311                         ret = clk_set_rate(dev->clk, bitclk);
 312                         if (ret) {
 313                                 dev_err(dev->dev, "Can't set I2S clock rate: %d\n",
 314                                         ret);
 315                                 return ret;
 316                         }
 317                 }
 318         }
 319         return 0;
 320 }
 321
 322 static void dw_i2s_shutdown(struct snd_pcm_substream *substream,
 323                 struct snd_soc_dai *dai)
 324 {
 325         snd_soc_dai_set_dma_data(dai, substream, NULL);
 326 }
 327
 328 static int dw_i2s_prepare(struct snd_pcm_substream *substream,
 329                           struct snd_soc_dai *dai)
 330 {
 331         struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
 332
 333         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 334                 i2s_write_reg(dev->i2s_base, TXFFR, 1);
 335         else
 336                 i2s_write_reg(dev->i2s_base, RXFFR, 1);
 337
 338         return 0;
 339 }
 340
 341 static int dw_i2s_trigger(struct snd_pcm_substream *substream,
 342                 int cmd, struct snd_soc_dai *dai)
 343 {
 344         struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
 345         int ret = 0;
 346
 347         switch (cmd) {
 348         case SNDRV_PCM_TRIGGER_START:
 349         case SNDRV_PCM_TRIGGER_RESUME:
 350         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 351                 dev->active++;
 352                 i2s_start(dev, substream);
 353                 break;
 354
 355         case SNDRV_PCM_TRIGGER_STOP:
 356         case SNDRV_PCM_TRIGGER_SUSPEND:
 357         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 358                 dev->active--;
 359                 i2s_stop(dev, substream);
 360                 break;
 361         default:
 362                 ret = -EINVAL;
 363                 break;
 364         }
 365         return ret;
 366 }
 367
 368 static int dw_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
 369 {
 370         struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
 371         int ret = 0;
 372
 373         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 374         case SND_SOC_DAIFMT_CBM_CFM:
 375                 if (dev->capability & DW_I2S_SLAVE)
 376                         ret = 0;
 377                 else
 378                         ret = -EINVAL;
 379                 break;
 380         case SND_SOC_DAIFMT_CBS_CFS:
 381                 if (dev->capability & DW_I2S_MASTER)
 382                         ret = 0;
 383                 else
 384                         ret = -EINVAL;
 385                 break;
 386         case SND_SOC_DAIFMT_CBM_CFS:
 387         case SND_SOC_DAIFMT_CBS_CFM:
 388                 ret = -EINVAL;
 389                 break;
 390         default:
 391                 dev_dbg(dev->dev, "dwc : Invalid master/slave format\n");
 392                 ret = -EINVAL;
 393                 break;
 394         }
 395         return ret;
 396 }
 397
 398 static struct snd_soc_dai_ops dw_i2s_dai_ops = {
 399         .startup        = dw_i2s_startup,
 400         .shutdown       = dw_i2s_shutdown,
 401         .hw_params      = dw_i2s_hw_params,
 402         .prepare        = dw_i2s_prepare,
 403         .trigger        = dw_i2s_trigger,
 404         .set_fmt        = dw_i2s_set_fmt,
 405 };
 406
 407 static const struct snd_soc_component_driver dw_i2s_component = {
 408         .name           = "dw-i2s",
 409 };
 410
 411 #ifdef CONFIG_PM
 412 static int dw_i2s_runtime_suspend(struct device *dev)
 413 {
 414         struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev);
 415
 416         if (dw_dev->capability & DW_I2S_MASTER)
 417                 clk_disable(dw_dev->clk);
 418         return 0;
 419 }
 420
 421 static int dw_i2s_runtime_resume(struct device *dev)
 422 {
 423         struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev);
 424
 425         if (dw_dev->capability & DW_I2S_MASTER)
 426                 clk_enable(dw_dev->clk);
 427         return 0;
 428 }
 429
 430 static int dw_i2s_suspend(struct snd_soc_dai *dai)
 431 {
 432         struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
 433
 434         if (dev->capability & DW_I2S_MASTER)
 435                 clk_disable(dev->clk);
 436         return 0;
 437 }
 438
 439 static int dw_i2s_resume(struct snd_soc_dai *dai)
 440 {
 441         struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
 442
 443         if (dev->capability & DW_I2S_MASTER)
 444                 clk_enable(dev->clk);
 445
 446         if (dai->playback_active)
 447                 dw_i2s_config(dev, SNDRV_PCM_STREAM_PLAYBACK);
 448         if (dai->capture_active)
 449                 dw_i2s_config(dev, SNDRV_PCM_STREAM_CAPTURE);
 450         return 0;
 451 }
 452
 453 #else
 454 #define dw_i2s_suspend  NULL
 455 #define dw_i2s_resume   NULL
 456 #endif
 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 idx;
 502
 503         if (dev->capability & DWC_I2S_RECORD &&
 504                         dev->quirks & DW_I2S_QUIRK_COMP_PARAM1)
 505                 comp1 = comp1 & ~BIT(5);
 506
 507         if (COMP1_TX_ENABLED(comp1)) {
 508                 dev_dbg(dev->dev, " designware: play supported\n");
 509                 idx = COMP1_TX_WORDSIZE_0(comp1);
 510                 if (WARN_ON(idx >= ARRAY_SIZE(formats)))
 511                         return -EINVAL;
 512                 dw_i2s_dai->playback.channels_min = MIN_CHANNEL_NUM;
 513                 dw_i2s_dai->playback.channels_max =
 514                                 1 << (COMP1_TX_CHANNELS(comp1) + 1);
 515                 dw_i2s_dai->playback.formats = formats[idx];
 516                 dw_i2s_dai->playback.rates = rates;
 517         }
 518
 519         if (COMP1_RX_ENABLED(comp1)) {
 520                 dev_dbg(dev->dev, "designware: record supported\n");
 521                 idx = COMP2_RX_WORDSIZE_0(comp2);
 522                 if (WARN_ON(idx >= ARRAY_SIZE(formats)))
 523                         return -EINVAL;
 524                 dw_i2s_dai->capture.channels_min = MIN_CHANNEL_NUM;
 525                 dw_i2s_dai->capture.channels_max =
 526                                 1 << (COMP1_RX_CHANNELS(comp1) + 1);
 527                 dw_i2s_dai->capture.formats = formats[idx];
 528                 dw_i2s_dai->capture.rates = rates;
 529         }
 530
 531         if (COMP1_MODE_EN(comp1)) {
 532                 dev_dbg(dev->dev, "designware: i2s master mode supported\n");
 533                 dev->capability |= DW_I2S_MASTER;
 534         } else {
 535                 dev_dbg(dev->dev, "designware: i2s slave mode supported\n");
 536                 dev->capability |= DW_I2S_SLAVE;
 537         }
 538
 539         return 0;
 540 }
 541
 542 static int dw_configure_dai_by_pd(struct dw_i2s_dev *dev,
 543                                    struct snd_soc_dai_driver *dw_i2s_dai,
 544                                    struct resource *res,
 545                                    const struct i2s_platform_data *pdata)
 546 {
 547         u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1);
 548         u32 idx = COMP1_APB_DATA_WIDTH(comp1);
 549         int ret;
 550
 551         if (WARN_ON(idx >= ARRAY_SIZE(bus_widths)))
 552                 return -EINVAL;
 553
 554         ret = dw_configure_dai(dev, dw_i2s_dai, pdata->snd_rates);
 555         if (ret < 0)
 556                 return ret;
 557
 558         /* Set DMA slaves info */
 559         dev->play_dma_data.pd.data = pdata->play_dma_data;
 560         dev->capture_dma_data.pd.data = pdata->capture_dma_data;
 561         dev->play_dma_data.pd.addr = res->start + I2S_TXDMA;
 562         dev->capture_dma_data.pd.addr = res->start + I2S_RXDMA;
 563         dev->play_dma_data.pd.max_burst = 16;
 564         dev->capture_dma_data.pd.max_burst = 16;
 565         dev->play_dma_data.pd.addr_width = bus_widths[idx];
 566         dev->capture_dma_data.pd.addr_width = bus_widths[idx];
 567         dev->play_dma_data.pd.filter = pdata->filter;
 568         dev->capture_dma_data.pd.filter = pdata->filter;
 569
 570         return 0;
 571 }
 572
 573 static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev,
 574                                    struct snd_soc_dai_driver *dw_i2s_dai,
 575                                    struct resource *res)
 576 {
 577         u32 comp1 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_1);
 578         u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2);
 579         u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1));
 580         u32 idx = COMP1_APB_DATA_WIDTH(comp1);
 581         u32 idx2;
 582         int ret;
 583
 584         if (WARN_ON(idx >= ARRAY_SIZE(bus_widths)))
 585                 return -EINVAL;
 586
 587         ret = dw_configure_dai(dev, dw_i2s_dai, SNDRV_PCM_RATE_8000_192000);
 588         if (ret < 0)
 589                 return ret;
 590
 591         if (COMP1_TX_ENABLED(comp1)) {
 592                 idx2 = COMP1_TX_WORDSIZE_0(comp1);
 593
 594                 dev->capability |= DWC_I2S_PLAY;
 595                 dev->play_dma_data.dt.addr = res->start + I2S_TXDMA;
 596                 dev->play_dma_data.dt.addr_width = bus_widths[idx];
 597                 dev->play_dma_data.dt.chan_name = "TX";
 598                 dev->play_dma_data.dt.fifo_size = fifo_depth *
 599                         (fifo_width[idx2]) >> 8;
 600                 dev->play_dma_data.dt.maxburst = 16;
 601         }
 602         if (COMP1_RX_ENABLED(comp1)) {
 603                 idx2 = COMP2_RX_WORDSIZE_0(comp2);
 604
 605                 dev->capability |= DWC_I2S_RECORD;
 606                 dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA;
 607                 dev->capture_dma_data.dt.addr_width = bus_widths[idx];
 608                 dev->capture_dma_data.dt.chan_name = "RX";
 609                 dev->capture_dma_data.dt.fifo_size = fifo_depth *
 610                         (fifo_width[idx2] >> 8);
 611                 dev->capture_dma_data.dt.maxburst = 16;
 612         }
 613
 614         return 0;
 615
 616 }
 617
 618 static int dw_i2s_probe(struct platform_device *pdev)
 619 {
 620         const struct i2s_platform_data *pdata = pdev->dev.platform_data;
 621         struct dw_i2s_dev *dev;
 622         struct resource *res;
 623         int ret;
 624         struct snd_soc_dai_driver *dw_i2s_dai;
 625         const char *clk_id;
 626
 627         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 628         if (!dev) {
 629                 dev_warn(&pdev->dev, "kzalloc fail\n");
 630                 return -ENOMEM;
 631         }
 632
 633         dw_i2s_dai = devm_kzalloc(&pdev->dev, sizeof(*dw_i2s_dai), GFP_KERNEL);
 634         if (!dw_i2s_dai)
 635                 return -ENOMEM;
 636
 637         dw_i2s_dai->ops = &dw_i2s_dai_ops;
 638         dw_i2s_dai->suspend = dw_i2s_suspend;
 639         dw_i2s_dai->resume = dw_i2s_resume;
 640
 641         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 642         dev->i2s_base = devm_ioremap_resource(&pdev->dev, res);
 643         if (IS_ERR(dev->i2s_base))
 644                 return PTR_ERR(dev->i2s_base);
 645
 646         dev->dev = &pdev->dev;
 647
 648         dev->i2s_reg_comp1 = I2S_COMP_PARAM_1;
 649         dev->i2s_reg_comp2 = I2S_COMP_PARAM_2;
 650         if (pdata) {
 651                 dev->capability = pdata->cap;
 652                 clk_id = NULL;
 653                 dev->quirks = pdata->quirks;
 654                 if (dev->quirks & DW_I2S_QUIRK_COMP_REG_OFFSET) {
 655                         dev->i2s_reg_comp1 = pdata->i2s_reg_comp1;
 656                         dev->i2s_reg_comp2 = pdata->i2s_reg_comp2;
 657                 }
 658                 ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata);
 659         } else {
 660                 clk_id = "i2sclk";
 661                 ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res);
 662         }
 663         if (ret < 0)
 664                 return ret;
 665
 666         if (dev->capability & DW_I2S_MASTER) {
 667                 if (pdata) {
 668                         dev->i2s_clk_cfg = pdata->i2s_clk_cfg;
 669                         if (!dev->i2s_clk_cfg) {
 670                                 dev_err(&pdev->dev, "no clock configure method\n");
 671                                 return -ENODEV;
 672                         }
 673                 }
 674                 dev->clk = devm_clk_get(&pdev->dev, clk_id);
 675
 676                 if (IS_ERR(dev->clk))
 677                         return PTR_ERR(dev->clk);
 678
 679                 ret = clk_prepare_enable(dev->clk);
 680                 if (ret < 0)
 681                         return ret;
 682         }
 683
 684         dev_set_drvdata(&pdev->dev, dev);
 685         ret = devm_snd_soc_register_component(&pdev->dev, &dw_i2s_component,
 686                                          dw_i2s_dai, 1);
 687         if (ret != 0) {
 688                 dev_err(&pdev->dev, "not able to register dai\n");
 689                 goto err_clk_disable;
 690         }
 691
 692         if (!pdata) {
 693                 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
 694                 if (ret) {
 695                         dev_err(&pdev->dev,
 696                                 "Could not register PCM: %d\n", ret);
 697                         goto err_clk_disable;
 698                 }
 699         }
 700         pm_runtime_enable(&pdev->dev);
 701         return 0;
 702
 703 err_clk_disable:
 704         if (dev->capability & DW_I2S_MASTER)
 705                 clk_disable_unprepare(dev->clk);
 706         return ret;
 707 }
 708
 709 static int dw_i2s_remove(struct platform_device *pdev)
 710 {
 711         struct dw_i2s_dev *dev = dev_get_drvdata(&pdev->dev);
 712
 713         if (dev->capability & DW_I2S_MASTER)
 714                 clk_disable_unprepare(dev->clk);
 715
 716         pm_runtime_disable(&pdev->dev);
 717         return 0;
 718 }
 719
 720 #ifdef CONFIG_OF
 721 static const struct of_device_id dw_i2s_of_match[] = {
 722         { .compatible = "snps,designware-i2s",   },
 723         {},
 724 };
 725
 726 MODULE_DEVICE_TABLE(of, dw_i2s_of_match);
 727 #endif
 728
 729 static const struct dev_pm_ops dwc_pm_ops = {
 730         SET_RUNTIME_PM_OPS(dw_i2s_runtime_suspend, dw_i2s_runtime_resume, NULL)
 731 };
 732
 733 static struct platform_driver dw_i2s_driver = {
 734         .probe          = dw_i2s_probe,
 735         .remove         = dw_i2s_remove,
 736         .driver         = {
 737                 .name   = "designware-i2s",
 738                 .of_match_table = of_match_ptr(dw_i2s_of_match),
 739                 .pm = &dwc_pm_ops,
 740         },
 741 };
 742
 743 module_platform_driver(dw_i2s_driver);
 744
 745 MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
 746 MODULE_DESCRIPTION("DESIGNWARE I2S SoC Interface");
 747 MODULE_LICENSE("GPL");
 748 MODULE_ALIAS("platform:designware_i2s");