sound/soc/tegra/tegra30_i2s.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * tegra30_i2s.c - Tegra30 I2S driver
   4  *
   5  * Author: Stephen Warren <swarren@nvidia.com>
   6  * Copyright (c) 2010-2012, NVIDIA CORPORATION.  All rights reserved.
   7  *
   8  * Based on code copyright/by:
   9  *
  10  * Copyright (c) 2009-2010, NVIDIA Corporation.
  11  * Scott Peterson <speterson@nvidia.com>
  12  *
  13  * Copyright (C) 2010 Google, Inc.
  14  * Iliyan Malchev <malchev@google.com>
  15  */
  16
  17 #include <linux/clk.h>
  18 #include <linux/device.h>
  19 #include <linux/io.h>
  20 #include <linux/module.h>
  21 #include <linux/of.h>
  22 #include <linux/of_device.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/pm_runtime.h>
  25 #include <linux/regmap.h>
  26 #include <linux/reset.h>
  27 #include <linux/slab.h>
  28 #include <sound/core.h>
  29 #include <sound/pcm.h>
  30 #include <sound/pcm_params.h>
  31 #include <sound/soc.h>
  32 #include <sound/dmaengine_pcm.h>
  33
  34 #include "tegra30_ahub.h"
  35 #include "tegra30_i2s.h"
  36
  37 #define DRV_NAME "tegra30-i2s"
  38
  39 static __maybe_unused int tegra30_i2s_runtime_suspend(struct device *dev)
  40 {
  41         struct tegra30_i2s *i2s = dev_get_drvdata(dev);
  42
  43         regcache_cache_only(i2s->regmap, true);
  44
  45         clk_disable_unprepare(i2s->clk_i2s);
  46
  47         return 0;
  48 }
  49
  50 static __maybe_unused int tegra30_i2s_runtime_resume(struct device *dev)
  51 {
  52         struct tegra30_i2s *i2s = dev_get_drvdata(dev);
  53         int ret;
  54
  55         ret = clk_prepare_enable(i2s->clk_i2s);
  56         if (ret) {
  57                 dev_err(dev, "clk_enable failed: %d\n", ret);
  58                 return ret;
  59         }
  60
  61         regcache_cache_only(i2s->regmap, false);
  62         regcache_mark_dirty(i2s->regmap);
  63
  64         ret = regcache_sync(i2s->regmap);
  65         if (ret)
  66                 goto disable_clocks;
  67
  68         return 0;
  69
  70 disable_clocks:
  71         clk_disable_unprepare(i2s->clk_i2s);
  72
  73         return ret;
  74 }
  75
  76 static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
  77                                 unsigned int fmt)
  78 {
  79         struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
  80         unsigned int mask = 0, val = 0;
  81
  82         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
  83         case SND_SOC_DAIFMT_NB_NF:
  84                 break;
  85         default:
  86                 return -EINVAL;
  87         }
  88
  89         mask |= TEGRA30_I2S_CTRL_MASTER_ENABLE;
  90         switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
  91         case SND_SOC_DAIFMT_BP_FP:
  92                 val |= TEGRA30_I2S_CTRL_MASTER_ENABLE;
  93                 break;
  94         case SND_SOC_DAIFMT_BC_FC:
  95                 break;
  96         default:
  97                 return -EINVAL;
  98         }
  99
 100         mask |= TEGRA30_I2S_CTRL_FRAME_FORMAT_MASK |
 101                 TEGRA30_I2S_CTRL_LRCK_MASK;
 102         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 103         case SND_SOC_DAIFMT_DSP_A:
 104                 val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
 105                 val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
 106                 break;
 107         case SND_SOC_DAIFMT_DSP_B:
 108                 val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
 109                 val |= TEGRA30_I2S_CTRL_LRCK_R_LOW;
 110                 break;
 111         case SND_SOC_DAIFMT_I2S:
 112                 val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
 113                 val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
 114                 break;
 115         case SND_SOC_DAIFMT_RIGHT_J:
 116                 val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
 117                 val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
 118                 break;
 119         case SND_SOC_DAIFMT_LEFT_J:
 120                 val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
 121                 val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
 122                 break;
 123         default:
 124                 return -EINVAL;
 125         }
 126
 127         pm_runtime_get_sync(dai->dev);
 128         regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL, mask, val);
 129         pm_runtime_put(dai->dev);
 130
 131         return 0;
 132 }
 133
 134 static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
 135                                  struct snd_pcm_hw_params *params,
 136                                  struct snd_soc_dai *dai)
 137 {
 138         struct device *dev = dai->dev;
 139         struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
 140         unsigned int mask, val, reg;
 141         int ret, sample_size, srate, i2sclock, bitcnt;
 142         struct tegra30_ahub_cif_conf cif_conf;
 143
 144         if (params_channels(params) != 2)
 145                 return -EINVAL;
 146
 147         mask = TEGRA30_I2S_CTRL_BIT_SIZE_MASK;
 148         switch (params_format(params)) {
 149         case SNDRV_PCM_FORMAT_S16_LE:
 150                 val = TEGRA30_I2S_CTRL_BIT_SIZE_16;
 151                 sample_size = 16;
 152                 break;
 153         default:
 154                 return -EINVAL;
 155         }
 156
 157         regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL, mask, val);
 158
 159         srate = params_rate(params);
 160
 161         /* Final "* 2" required by Tegra hardware */
 162         i2sclock = srate * params_channels(params) * sample_size * 2;
 163
 164         bitcnt = (i2sclock / (2 * srate)) - 1;
 165         if (bitcnt < 0 || bitcnt > TEGRA30_I2S_TIMING_CHANNEL_BIT_COUNT_MASK_US)
 166                 return -EINVAL;
 167
 168         ret = clk_set_rate(i2s->clk_i2s, i2sclock);
 169         if (ret) {
 170                 dev_err(dev, "Can't set I2S clock rate: %d\n", ret);
 171                 return ret;
 172         }
 173
 174         val = bitcnt << TEGRA30_I2S_TIMING_CHANNEL_BIT_COUNT_SHIFT;
 175
 176         if (i2sclock % (2 * srate))
 177                 val |= TEGRA30_I2S_TIMING_NON_SYM_ENABLE;
 178
 179         regmap_write(i2s->regmap, TEGRA30_I2S_TIMING, val);
 180
 181         cif_conf.threshold = 0;
 182         cif_conf.audio_channels = 2;
 183         cif_conf.client_channels = 2;
 184         cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
 185         cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
 186         cif_conf.expand = 0;
 187         cif_conf.stereo_conv = 0;
 188         cif_conf.replicate = 0;
 189         cif_conf.truncate = 0;
 190         cif_conf.mono_conv = 0;
 191
 192         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 193                 cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
 194                 reg = TEGRA30_I2S_CIF_RX_CTRL;
 195         } else {
 196                 cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
 197                 reg = TEGRA30_I2S_CIF_TX_CTRL;
 198         }
 199
 200         i2s->soc_data->set_audio_cif(i2s->regmap, reg, &cif_conf);
 201
 202         val = (1 << TEGRA30_I2S_OFFSET_RX_DATA_OFFSET_SHIFT) |
 203               (1 << TEGRA30_I2S_OFFSET_TX_DATA_OFFSET_SHIFT);
 204         regmap_write(i2s->regmap, TEGRA30_I2S_OFFSET, val);
 205
 206         return 0;
 207 }
 208
 209 static void tegra30_i2s_start_playback(struct tegra30_i2s *i2s)
 210 {
 211         tegra30_ahub_enable_tx_fifo(i2s->playback_fifo_cif);
 212         regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
 213                            TEGRA30_I2S_CTRL_XFER_EN_TX,
 214                            TEGRA30_I2S_CTRL_XFER_EN_TX);
 215 }
 216
 217 static void tegra30_i2s_stop_playback(struct tegra30_i2s *i2s)
 218 {
 219         tegra30_ahub_disable_tx_fifo(i2s->playback_fifo_cif);
 220         regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
 221                            TEGRA30_I2S_CTRL_XFER_EN_TX, 0);
 222 }
 223
 224 static void tegra30_i2s_start_capture(struct tegra30_i2s *i2s)
 225 {
 226         tegra30_ahub_enable_rx_fifo(i2s->capture_fifo_cif);
 227         regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
 228                            TEGRA30_I2S_CTRL_XFER_EN_RX,
 229                            TEGRA30_I2S_CTRL_XFER_EN_RX);
 230 }
 231
 232 static void tegra30_i2s_stop_capture(struct tegra30_i2s *i2s)
 233 {
 234         regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
 235                            TEGRA30_I2S_CTRL_XFER_EN_RX, 0);
 236         tegra30_ahub_disable_rx_fifo(i2s->capture_fifo_cif);
 237 }
 238
 239 static int tegra30_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 240                                 struct snd_soc_dai *dai)
 241 {
 242         struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
 243
 244         switch (cmd) {
 245         case SNDRV_PCM_TRIGGER_START:
 246         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 247         case SNDRV_PCM_TRIGGER_RESUME:
 248                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 249                         tegra30_i2s_start_playback(i2s);
 250                 else
 251                         tegra30_i2s_start_capture(i2s);
 252                 break;
 253         case SNDRV_PCM_TRIGGER_STOP:
 254         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 255         case SNDRV_PCM_TRIGGER_SUSPEND:
 256                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 257                         tegra30_i2s_stop_playback(i2s);
 258                 else
 259                         tegra30_i2s_stop_capture(i2s);
 260                 break;
 261         default:
 262                 return -EINVAL;
 263         }
 264
 265         return 0;
 266 }
 267
 268 static int tegra30_i2s_set_tdm(struct snd_soc_dai *dai,
 269                                unsigned int tx_mask, unsigned int rx_mask,
 270                                int slots, int slot_width)
 271 {
 272         struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
 273         unsigned int mask, val;
 274
 275         dev_dbg(dai->dev, "%s: txmask=0x%08x rxmask=0x%08x slots=%d width=%d\n",
 276                  __func__, tx_mask, rx_mask, slots, slot_width);
 277
 278         mask = TEGRA30_I2S_SLOT_CTRL_TOTAL_SLOTS_MASK |
 279                TEGRA30_I2S_SLOT_CTRL_RX_SLOT_ENABLES_MASK |
 280                TEGRA30_I2S_SLOT_CTRL_TX_SLOT_ENABLES_MASK;
 281
 282         val = (tx_mask << TEGRA30_I2S_SLOT_CTRL_TX_SLOT_ENABLES_SHIFT) |
 283               (rx_mask << TEGRA30_I2S_SLOT_CTRL_RX_SLOT_ENABLES_SHIFT) |
 284               ((slots - 1) << TEGRA30_I2S_SLOT_CTRL_TOTAL_SLOTS_SHIFT);
 285
 286         pm_runtime_get_sync(dai->dev);
 287         regmap_update_bits(i2s->regmap, TEGRA30_I2S_SLOT_CTRL, mask, val);
 288         /* set the fsync width to minimum of 1 clock width */
 289         regmap_update_bits(i2s->regmap, TEGRA30_I2S_CH_CTRL,
 290                            TEGRA30_I2S_CH_CTRL_FSYNC_WIDTH_MASK, 0x0);
 291         pm_runtime_put(dai->dev);
 292
 293         return 0;
 294 }
 295
 296 static int tegra30_i2s_probe(struct snd_soc_dai *dai)
 297 {
 298         struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
 299
 300         dai->capture_dma_data = &i2s->capture_dma_data;
 301         dai->playback_dma_data = &i2s->playback_dma_data;
 302
 303         return 0;
 304 }
 305
 306 static const struct snd_soc_dai_ops tegra30_i2s_dai_ops = {
 307         .set_fmt        = tegra30_i2s_set_fmt,
 308         .hw_params      = tegra30_i2s_hw_params,
 309         .trigger        = tegra30_i2s_trigger,
 310         .set_tdm_slot   = tegra30_i2s_set_tdm,
 311 };
 312
 313 static const struct snd_soc_dai_driver tegra30_i2s_dai_template = {
 314         .probe = tegra30_i2s_probe,
 315         .playback = {
 316                 .stream_name = "Playback",
 317                 .channels_min = 2,
 318                 .channels_max = 2,
 319                 .rates = SNDRV_PCM_RATE_8000_96000,
 320                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 321         },
 322         .capture = {
 323                 .stream_name = "Capture",
 324                 .channels_min = 2,
 325                 .channels_max = 2,
 326                 .rates = SNDRV_PCM_RATE_8000_96000,
 327                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 328         },
 329         .ops = &tegra30_i2s_dai_ops,
 330         .symmetric_rate = 1,
 331 };
 332
 333 static const struct snd_soc_component_driver tegra30_i2s_component = {
 334         .name                   = DRV_NAME,
 335         .legacy_dai_naming      = 1,
 336 };
 337
 338 static bool tegra30_i2s_wr_rd_reg(struct device *dev, unsigned int reg)
 339 {
 340         switch (reg) {
 341         case TEGRA30_I2S_CTRL:
 342         case TEGRA30_I2S_TIMING:
 343         case TEGRA30_I2S_OFFSET:
 344         case TEGRA30_I2S_CH_CTRL:
 345         case TEGRA30_I2S_SLOT_CTRL:
 346         case TEGRA30_I2S_CIF_RX_CTRL:
 347         case TEGRA30_I2S_CIF_TX_CTRL:
 348         case TEGRA30_I2S_FLOWCTL:
 349         case TEGRA30_I2S_TX_STEP:
 350         case TEGRA30_I2S_FLOW_STATUS:
 351         case TEGRA30_I2S_FLOW_TOTAL:
 352         case TEGRA30_I2S_FLOW_OVER:
 353         case TEGRA30_I2S_FLOW_UNDER:
 354         case TEGRA30_I2S_LCOEF_1_4_0:
 355         case TEGRA30_I2S_LCOEF_1_4_1:
 356         case TEGRA30_I2S_LCOEF_1_4_2:
 357         case TEGRA30_I2S_LCOEF_1_4_3:
 358         case TEGRA30_I2S_LCOEF_1_4_4:
 359         case TEGRA30_I2S_LCOEF_1_4_5:
 360         case TEGRA30_I2S_LCOEF_2_4_0:
 361         case TEGRA30_I2S_LCOEF_2_4_1:
 362         case TEGRA30_I2S_LCOEF_2_4_2:
 363                 return true;
 364         default:
 365                 return false;
 366         }
 367 }
 368
 369 static bool tegra30_i2s_volatile_reg(struct device *dev, unsigned int reg)
 370 {
 371         switch (reg) {
 372         case TEGRA30_I2S_FLOW_STATUS:
 373         case TEGRA30_I2S_FLOW_TOTAL:
 374         case TEGRA30_I2S_FLOW_OVER:
 375         case TEGRA30_I2S_FLOW_UNDER:
 376                 return true;
 377         default:
 378                 return false;
 379         }
 380 }
 381
 382 static const struct regmap_config tegra30_i2s_regmap_config = {
 383         .reg_bits = 32,
 384         .reg_stride = 4,
 385         .val_bits = 32,
 386         .max_register = TEGRA30_I2S_LCOEF_2_4_2,
 387         .writeable_reg = tegra30_i2s_wr_rd_reg,
 388         .readable_reg = tegra30_i2s_wr_rd_reg,
 389         .volatile_reg = tegra30_i2s_volatile_reg,
 390         .cache_type = REGCACHE_FLAT,
 391 };
 392
 393 static const struct tegra30_i2s_soc_data tegra30_i2s_config = {
 394         .set_audio_cif = tegra30_ahub_set_cif,
 395 };
 396
 397 static const struct tegra30_i2s_soc_data tegra124_i2s_config = {
 398         .set_audio_cif = tegra124_ahub_set_cif,
 399 };
 400
 401 static const struct of_device_id tegra30_i2s_of_match[] = {
 402         { .compatible = "nvidia,tegra124-i2s", .data = &tegra124_i2s_config },
 403         { .compatible = "nvidia,tegra30-i2s", .data = &tegra30_i2s_config },
 404         {},
 405 };
 406
 407 static int tegra30_i2s_platform_probe(struct platform_device *pdev)
 408 {
 409         struct tegra30_i2s *i2s;
 410         const struct tegra30_i2s_soc_data *soc_data;
 411         u32 cif_ids[2];
 412         void __iomem *regs;
 413         int ret;
 414
 415         i2s = devm_kzalloc(&pdev->dev, sizeof(struct tegra30_i2s), GFP_KERNEL);
 416         if (!i2s) {
 417                 ret = -ENOMEM;
 418                 goto err;
 419         }
 420         dev_set_drvdata(&pdev->dev, i2s);
 421
 422         soc_data = of_device_get_match_data(&pdev->dev);
 423         if (!soc_data) {
 424                 dev_err(&pdev->dev, "Error: No device match found\n");
 425                 ret = -ENODEV;
 426                 goto err;
 427         }
 428         i2s->soc_data = soc_data;
 429
 430         i2s->dai = tegra30_i2s_dai_template;
 431         i2s->dai.name = dev_name(&pdev->dev);
 432
 433         ret = of_property_read_u32_array(pdev->dev.of_node,
 434                                          "nvidia,ahub-cif-ids", cif_ids,
 435                                          ARRAY_SIZE(cif_ids));
 436         if (ret < 0)
 437                 goto err;
 438
 439         i2s->playback_i2s_cif = cif_ids[0];
 440         i2s->capture_i2s_cif = cif_ids[1];
 441
 442         i2s->clk_i2s = devm_clk_get(&pdev->dev, NULL);
 443         if (IS_ERR(i2s->clk_i2s)) {
 444                 dev_err(&pdev->dev, "Can't retrieve i2s clock\n");
 445                 ret = PTR_ERR(i2s->clk_i2s);
 446                 goto err;
 447         }
 448
 449         regs = devm_platform_ioremap_resource(pdev, 0);
 450         if (IS_ERR(regs)) {
 451                 ret = PTR_ERR(regs);
 452                 goto err;
 453         }
 454
 455         i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
 456                                             &tegra30_i2s_regmap_config);
 457         if (IS_ERR(i2s->regmap)) {
 458                 dev_err(&pdev->dev, "regmap init failed\n");
 459                 ret = PTR_ERR(i2s->regmap);
 460                 goto err;
 461         }
 462         regcache_cache_only(i2s->regmap, true);
 463
 464         pm_runtime_enable(&pdev->dev);
 465
 466         i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 467         i2s->playback_dma_data.maxburst = 4;
 468         ret = tegra30_ahub_allocate_tx_fifo(&i2s->playback_fifo_cif,
 469                                             i2s->playback_dma_chan,
 470                                             sizeof(i2s->playback_dma_chan),
 471                                             &i2s->playback_dma_data.addr);
 472         if (ret) {
 473                 dev_err(&pdev->dev, "Could not alloc TX FIFO: %d\n", ret);
 474                 goto err_pm_disable;
 475         }
 476         ret = tegra30_ahub_set_rx_cif_source(i2s->playback_i2s_cif,
 477                                              i2s->playback_fifo_cif);
 478         if (ret) {
 479                 dev_err(&pdev->dev, "Could not route TX FIFO: %d\n", ret);
 480                 goto err_free_tx_fifo;
 481         }
 482
 483         i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 484         i2s->capture_dma_data.maxburst = 4;
 485         ret = tegra30_ahub_allocate_rx_fifo(&i2s->capture_fifo_cif,
 486                                             i2s->capture_dma_chan,
 487                                             sizeof(i2s->capture_dma_chan),
 488                                             &i2s->capture_dma_data.addr);
 489         if (ret) {
 490                 dev_err(&pdev->dev, "Could not alloc RX FIFO: %d\n", ret);
 491                 goto err_unroute_tx_fifo;
 492         }
 493         ret = tegra30_ahub_set_rx_cif_source(i2s->capture_fifo_cif,
 494                                              i2s->capture_i2s_cif);
 495         if (ret) {
 496                 dev_err(&pdev->dev, "Could not route TX FIFO: %d\n", ret);
 497                 goto err_free_rx_fifo;
 498         }
 499
 500         ret = snd_soc_register_component(&pdev->dev, &tegra30_i2s_component,
 501                                    &i2s->dai, 1);
 502         if (ret) {
 503                 dev_err(&pdev->dev, "Could not register DAI: %d\n", ret);
 504                 ret = -ENOMEM;
 505                 goto err_unroute_rx_fifo;
 506         }
 507
 508         ret = tegra_pcm_platform_register_with_chan_names(&pdev->dev,
 509                                 &i2s->dma_config, i2s->playback_dma_chan,
 510                                 i2s->capture_dma_chan);
 511         if (ret) {
 512                 dev_err(&pdev->dev, "Could not register PCM: %d\n", ret);
 513                 goto err_unregister_component;
 514         }
 515
 516         return 0;
 517
 518 err_unregister_component:
 519         snd_soc_unregister_component(&pdev->dev);
 520 err_unroute_rx_fifo:
 521         tegra30_ahub_unset_rx_cif_source(i2s->capture_fifo_cif);
 522 err_free_rx_fifo:
 523         tegra30_ahub_free_rx_fifo(i2s->capture_fifo_cif);
 524 err_unroute_tx_fifo:
 525         tegra30_ahub_unset_rx_cif_source(i2s->playback_i2s_cif);
 526 err_free_tx_fifo:
 527         tegra30_ahub_free_tx_fifo(i2s->playback_fifo_cif);
 528 err_pm_disable:
 529         pm_runtime_disable(&pdev->dev);
 530 err:
 531         return ret;
 532 }
 533
 534 static int tegra30_i2s_platform_remove(struct platform_device *pdev)
 535 {
 536         struct tegra30_i2s *i2s = dev_get_drvdata(&pdev->dev);
 537
 538         tegra_pcm_platform_unregister(&pdev->dev);
 539         snd_soc_unregister_component(&pdev->dev);
 540
 541         tegra30_ahub_unset_rx_cif_source(i2s->capture_fifo_cif);
 542         tegra30_ahub_free_rx_fifo(i2s->capture_fifo_cif);
 543
 544         tegra30_ahub_unset_rx_cif_source(i2s->playback_i2s_cif);
 545         tegra30_ahub_free_tx_fifo(i2s->playback_fifo_cif);
 546
 547         pm_runtime_disable(&pdev->dev);
 548
 549         return 0;
 550 }
 551
 552 static const struct dev_pm_ops tegra30_i2s_pm_ops = {
 553         SET_RUNTIME_PM_OPS(tegra30_i2s_runtime_suspend,
 554                            tegra30_i2s_runtime_resume, NULL)
 555         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 556                                 pm_runtime_force_resume)
 557 };
 558
 559 static struct platform_driver tegra30_i2s_driver = {
 560         .driver = {
 561                 .name = DRV_NAME,
 562                 .of_match_table = tegra30_i2s_of_match,
 563                 .pm = &tegra30_i2s_pm_ops,
 564         },
 565         .probe = tegra30_i2s_platform_probe,
 566         .remove = tegra30_i2s_platform_remove,
 567 };
 568 module_platform_driver(tegra30_i2s_driver);
 569
 570 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 571 MODULE_DESCRIPTION("Tegra30 I2S ASoC driver");
 572 MODULE_LICENSE("GPL");
 573 MODULE_ALIAS("platform:" DRV_NAME);
 574 MODULE_DEVICE_TABLE(of, tegra30_i2s_of_match);