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