kernel/sound/soc/fsl/fsl-asoc-card.c

   1 /*
   2  * Freescale Generic ASoC Sound Card driver with ASRC
   3  *
   4  * Copyright (C) 2014 Freescale Semiconductor, Inc.
   5  *
   6  * Author: Nicolin Chen <nicoleotsuka@gmail.com>
   7  *
   8  * This file is licensed under the terms of the GNU General Public License
   9  * version 2. This program is licensed "as is" without any warranty of any
  10  * kind, whether express or implied.
  11  */
  12
  13 #include <linux/clk.h>
  14 #include <linux/i2c.h>
  15 #include <linux/module.h>
  16 #include <linux/of_platform.h>
  17 #include <sound/pcm_params.h>
  18 #include <sound/soc.h>
  19
  20 #include "fsl_esai.h"
  21 #include "fsl_sai.h"
  22 #include "imx-audmux.h"
  23
  24 #include "../codecs/sgtl5000.h"
  25 #include "../codecs/wm8962.h"
  26
  27 #define RX 0
  28 #define TX 1
  29
  30 /* Default DAI format without Master and Slave flag */
  31 #define DAI_FMT_BASE (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF)
  32
  33 /**
  34  * CODEC private data
  35  *
  36  * @mclk_freq: Clock rate of MCLK
  37  * @mclk_id: MCLK (or main clock) id for set_sysclk()
  38  * @fll_id: FLL (or secordary clock) id for set_sysclk()
  39  * @pll_id: PLL id for set_pll()
  40  */
  41 struct codec_priv {
  42         unsigned long mclk_freq;
  43         u32 mclk_id;
  44         u32 fll_id;
  45         u32 pll_id;
  46 };
  47
  48 /**
  49  * CPU private data
  50  *
  51  * @sysclk_freq[2]: SYSCLK rates for set_sysclk()
  52  * @sysclk_dir[2]: SYSCLK directions for set_sysclk()
  53  * @sysclk_id[2]: SYSCLK ids for set_sysclk()
  54  * @slot_width: Slot width of each frame
  55  *
  56  * Note: [1] for tx and [0] for rx
  57  */
  58 struct cpu_priv {
  59         unsigned long sysclk_freq[2];
  60         u32 sysclk_dir[2];
  61         u32 sysclk_id[2];
  62         u32 slot_width;
  63 };
  64
  65 /**
  66  * Freescale Generic ASOC card private data
  67  *
  68  * @dai_link[3]: DAI link structure including normal one and DPCM link
  69  * @pdev: platform device pointer
  70  * @codec_priv: CODEC private data
  71  * @cpu_priv: CPU private data
  72  * @card: ASoC card structure
  73  * @sample_rate: Current sample rate
  74  * @sample_format: Current sample format
  75  * @asrc_rate: ASRC sample rate used by Back-Ends
  76  * @asrc_format: ASRC sample format used by Back-Ends
  77  * @dai_fmt: DAI format between CPU and CODEC
  78  * @name: Card name
  79  */
  80
  81 struct fsl_asoc_card_priv {
  82         struct snd_soc_dai_link dai_link[3];
  83         struct platform_device *pdev;
  84         struct codec_priv codec_priv;
  85         struct cpu_priv cpu_priv;
  86         struct snd_soc_card card;
  87         u32 sample_rate;
  88         u32 sample_format;
  89         u32 asrc_rate;
  90         u32 asrc_format;
  91         u32 dai_fmt;
  92         char name[32];
  93 };
  94
  95 /**
  96  * This dapm route map exsits for DPCM link only.
  97  * The other routes shall go through Device Tree.
  98  */
  99 static const struct snd_soc_dapm_route audio_map[] = {
 100         {"CPU-Playback",  NULL, "ASRC-Playback"},
 101         {"Playback",  NULL, "CPU-Playback"},
 102         {"ASRC-Capture",  NULL, "CPU-Capture"},
 103         {"CPU-Capture",  NULL, "Capture"},
 104 };
 105
 106 /* Add all possible widgets into here without being redundant */
 107 static const struct snd_soc_dapm_widget fsl_asoc_card_dapm_widgets[] = {
 108         SND_SOC_DAPM_LINE("Line Out Jack", NULL),
 109         SND_SOC_DAPM_LINE("Line In Jack", NULL),
 110         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 111         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 112         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 113         SND_SOC_DAPM_MIC("AMIC", NULL),
 114         SND_SOC_DAPM_MIC("DMIC", NULL),
 115 };
 116
 117 static int fsl_asoc_card_hw_params(struct snd_pcm_substream *substream,
 118                                    struct snd_pcm_hw_params *params)
 119 {
 120         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 121         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 122         bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 123         struct cpu_priv *cpu_priv = &priv->cpu_priv;
 124         struct device *dev = rtd->card->dev;
 125         int ret;
 126
 127         priv->sample_rate = params_rate(params);
 128         priv->sample_format = params_format(params);
 129
 130         /*
 131          * If codec-dai is DAI Master and all configurations are already in the
 132          * set_bias_level(), bypass the remaining settings in hw_params().
 133          * Note: (dai_fmt & CBM_CFM) includes CBM_CFM and CBM_CFS.
 134          */
 135         if (priv->card.set_bias_level && priv->dai_fmt & SND_SOC_DAIFMT_CBM_CFM)
 136                 return 0;
 137
 138         /* Specific configurations of DAIs starts from here */
 139         ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, cpu_priv->sysclk_id[tx],
 140                                      cpu_priv->sysclk_freq[tx],
 141                                      cpu_priv->sysclk_dir[tx]);
 142         if (ret) {
 143                 dev_err(dev, "failed to set sysclk for cpu dai\n");
 144                 return ret;
 145         }
 146
 147         if (cpu_priv->slot_width) {
 148                 ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, 2,
 149                                                cpu_priv->slot_width);
 150                 if (ret) {
 151                         dev_err(dev, "failed to set TDM slot for cpu dai\n");
 152                         return ret;
 153                 }
 154         }
 155
 156         return 0;
 157 }
 158
 159 static struct snd_soc_ops fsl_asoc_card_ops = {
 160         .hw_params = fsl_asoc_card_hw_params,
 161 };
 162
 163 static int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
 164                               struct snd_pcm_hw_params *params)
 165 {
 166         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 167         struct snd_interval *rate;
 168         struct snd_mask *mask;
 169
 170         rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 171         rate->max = rate->min = priv->asrc_rate;
 172
 173         mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 174         snd_mask_none(mask);
 175         snd_mask_set(mask, priv->asrc_format);
 176
 177         return 0;
 178 }
 179
 180 static struct snd_soc_dai_link fsl_asoc_card_dai[] = {
 181         /* Default ASoC DAI Link*/
 182         {
 183                 .name = "HiFi",
 184                 .stream_name = "HiFi",
 185                 .ops = &fsl_asoc_card_ops,
 186         },
 187         /* DPCM Link between Front-End and Back-End (Optional) */
 188         {
 189                 .name = "HiFi-ASRC-FE",
 190                 .stream_name = "HiFi-ASRC-FE",
 191                 .codec_name = "snd-soc-dummy",
 192                 .codec_dai_name = "snd-soc-dummy-dai",
 193                 .dpcm_playback = 1,
 194                 .dpcm_capture = 1,
 195                 .dynamic = 1,
 196         },
 197         {
 198                 .name = "HiFi-ASRC-BE",
 199                 .stream_name = "HiFi-ASRC-BE",
 200                 .platform_name = "snd-soc-dummy",
 201                 .be_hw_params_fixup = be_hw_params_fixup,
 202                 .ops = &fsl_asoc_card_ops,
 203                 .dpcm_playback = 1,
 204                 .dpcm_capture = 1,
 205                 .no_pcm = 1,
 206         },
 207 };
 208
 209 static int fsl_asoc_card_set_bias_level(struct snd_soc_card *card,
 210                                         struct snd_soc_dapm_context *dapm,
 211                                         enum snd_soc_bias_level level)
 212 {
 213         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(card);
 214         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
 215         struct codec_priv *codec_priv = &priv->codec_priv;
 216         struct device *dev = card->dev;
 217         unsigned int pll_out;
 218         int ret;
 219
 220         if (dapm->dev != codec_dai->dev)
 221                 return 0;
 222
 223         switch (level) {
 224         case SND_SOC_BIAS_PREPARE:
 225                 if (dapm->bias_level != SND_SOC_BIAS_STANDBY)
 226                         break;
 227
 228                 if (priv->sample_format == SNDRV_PCM_FORMAT_S24_LE)
 229                         pll_out = priv->sample_rate * 384;
 230                 else
 231                         pll_out = priv->sample_rate * 256;
 232
 233                 ret = snd_soc_dai_set_pll(codec_dai, codec_priv->pll_id,
 234                                           codec_priv->mclk_id,
 235                                           codec_priv->mclk_freq, pll_out);
 236                 if (ret) {
 237                         dev_err(dev, "failed to start FLL: %d\n", ret);
 238                         return ret;
 239                 }
 240
 241                 ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->fll_id,
 242                                              pll_out, SND_SOC_CLOCK_IN);
 243                 if (ret) {
 244                         dev_err(dev, "failed to set SYSCLK: %d\n", ret);
 245                         return ret;
 246                 }
 247                 break;
 248
 249         case SND_SOC_BIAS_STANDBY:
 250                 if (dapm->bias_level != SND_SOC_BIAS_PREPARE)
 251                         break;
 252
 253                 ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->mclk_id,
 254                                              codec_priv->mclk_freq,
 255                                              SND_SOC_CLOCK_IN);
 256                 if (ret) {
 257                         dev_err(dev, "failed to switch away from FLL: %d\n", ret);
 258                         return ret;
 259                 }
 260
 261                 ret = snd_soc_dai_set_pll(codec_dai, codec_priv->pll_id, 0, 0, 0);
 262                 if (ret) {
 263                         dev_err(dev, "failed to stop FLL: %d\n", ret);
 264                         return ret;
 265                 }
 266                 break;
 267
 268         default:
 269                 break;
 270         }
 271
 272         return 0;
 273 }
 274
 275 static int fsl_asoc_card_audmux_init(struct device_node *np,
 276                                      struct fsl_asoc_card_priv *priv)
 277 {
 278         struct device *dev = &priv->pdev->dev;
 279         u32 int_ptcr = 0, ext_ptcr = 0;
 280         int int_port, ext_port;
 281         int ret;
 282
 283         ret = of_property_read_u32(np, "mux-int-port", &int_port);
 284         if (ret) {
 285                 dev_err(dev, "mux-int-port missing or invalid\n");
 286                 return ret;
 287         }
 288         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
 289         if (ret) {
 290                 dev_err(dev, "mux-ext-port missing or invalid\n");
 291                 return ret;
 292         }
 293
 294         /*
 295          * The port numbering in the hardware manual starts at 1, while
 296          * the AUDMUX API expects it starts at 0.
 297          */
 298         int_port--;
 299         ext_port--;
 300
 301         /*
 302          * Use asynchronous mode (6 wires) for all cases.
 303          * If only 4 wires are needed, just set SSI into
 304          * synchronous mode and enable 4 PADs in IOMUX.
 305          */
 306         switch (priv->dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 307         case SND_SOC_DAIFMT_CBM_CFM:
 308                 int_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | ext_port) |
 309                            IMX_AUDMUX_V2_PTCR_RCSEL(8 | ext_port) |
 310                            IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 311                            IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 312                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 313                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 314                            IMX_AUDMUX_V2_PTCR_TFSDIR |
 315                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 316                 break;
 317         case SND_SOC_DAIFMT_CBM_CFS:
 318                 int_ptcr = IMX_AUDMUX_V2_PTCR_RCSEL(8 | ext_port) |
 319                            IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 320                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 321                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 322                 ext_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | int_port) |
 323                            IMX_AUDMUX_V2_PTCR_TFSEL(int_port) |
 324                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 325                            IMX_AUDMUX_V2_PTCR_TFSDIR;
 326                 break;
 327         case SND_SOC_DAIFMT_CBS_CFM:
 328                 int_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | ext_port) |
 329                            IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 330                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 331                            IMX_AUDMUX_V2_PTCR_TFSDIR;
 332                 ext_ptcr = IMX_AUDMUX_V2_PTCR_RCSEL(8 | int_port) |
 333                            IMX_AUDMUX_V2_PTCR_TCSEL(int_port) |
 334                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 335                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 336                 break;
 337         case SND_SOC_DAIFMT_CBS_CFS:
 338                 ext_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | int_port) |
 339                            IMX_AUDMUX_V2_PTCR_RCSEL(8 | int_port) |
 340                            IMX_AUDMUX_V2_PTCR_TFSEL(int_port) |
 341                            IMX_AUDMUX_V2_PTCR_TCSEL(int_port) |
 342                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 343                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 344                            IMX_AUDMUX_V2_PTCR_TFSDIR |
 345                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 346                 break;
 347         default:
 348                 return -EINVAL;
 349         }
 350
 351         /* Asynchronous mode can not be set along with RCLKDIR */
 352         ret = imx_audmux_v2_configure_port(int_port, 0,
 353                                            IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
 354         if (ret) {
 355                 dev_err(dev, "audmux internal port setup failed\n");
 356                 return ret;
 357         }
 358
 359         ret = imx_audmux_v2_configure_port(int_port, int_ptcr,
 360                                            IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
 361         if (ret) {
 362                 dev_err(dev, "audmux internal port setup failed\n");
 363                 return ret;
 364         }
 365
 366         ret = imx_audmux_v2_configure_port(ext_port, 0,
 367                                            IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
 368         if (ret) {
 369                 dev_err(dev, "audmux external port setup failed\n");
 370                 return ret;
 371         }
 372
 373         ret = imx_audmux_v2_configure_port(ext_port, ext_ptcr,
 374                                            IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
 375         if (ret) {
 376                 dev_err(dev, "audmux external port setup failed\n");
 377                 return ret;
 378         }
 379
 380         return 0;
 381 }
 382
 383 static int fsl_asoc_card_late_probe(struct snd_soc_card *card)
 384 {
 385         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(card);
 386         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
 387         struct codec_priv *codec_priv = &priv->codec_priv;
 388         struct device *dev = card->dev;
 389         int ret;
 390
 391         ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->mclk_id,
 392                                      codec_priv->mclk_freq, SND_SOC_CLOCK_IN);
 393         if (ret) {
 394                 dev_err(dev, "failed to set sysclk in %s\n", __func__);
 395                 return ret;
 396         }
 397
 398         return 0;
 399 }
 400
 401 static int fsl_asoc_card_probe(struct platform_device *pdev)
 402 {
 403         struct device_node *cpu_np, *codec_np, *asrc_np;
 404         struct device_node *np = pdev->dev.of_node;
 405         struct platform_device *asrc_pdev = NULL;
 406         struct platform_device *cpu_pdev;
 407         struct fsl_asoc_card_priv *priv;
 408         struct i2c_client *codec_dev;
 409         struct clk *codec_clk;
 410         u32 width;
 411         int ret;
 412
 413         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 414         if (!priv)
 415                 return -ENOMEM;
 416
 417         cpu_np = of_parse_phandle(np, "audio-cpu", 0);
 418         /* Give a chance to old DT binding */
 419         if (!cpu_np)
 420                 cpu_np = of_parse_phandle(np, "ssi-controller", 0);
 421         codec_np = of_parse_phandle(np, "audio-codec", 0);
 422         if (!cpu_np || !codec_np) {
 423                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 424                 ret = -EINVAL;
 425                 goto fail;
 426         }
 427
 428         cpu_pdev = of_find_device_by_node(cpu_np);
 429         if (!cpu_pdev) {
 430                 dev_err(&pdev->dev, "failed to find CPU DAI device\n");
 431                 ret = -EINVAL;
 432                 goto fail;
 433         }
 434
 435         codec_dev = of_find_i2c_device_by_node(codec_np);
 436         if (!codec_dev) {
 437                 dev_err(&pdev->dev, "failed to find codec platform device\n");
 438                 ret = -EINVAL;
 439                 goto fail;
 440         }
 441
 442         asrc_np = of_parse_phandle(np, "audio-asrc", 0);
 443         if (asrc_np)
 444                 asrc_pdev = of_find_device_by_node(asrc_np);
 445
 446         /* Get the MCLK rate only, and leave it controlled by CODEC drivers */
 447         codec_clk = clk_get(&codec_dev->dev, NULL);
 448         if (!IS_ERR(codec_clk)) {
 449                 priv->codec_priv.mclk_freq = clk_get_rate(codec_clk);
 450                 clk_put(codec_clk);
 451         }
 452
 453         /* Default sample rate and format, will be updated in hw_params() */
 454         priv->sample_rate = 44100;
 455         priv->sample_format = SNDRV_PCM_FORMAT_S16_LE;
 456
 457         /* Assign a default DAI format, and allow each card to overwrite it */
 458         priv->dai_fmt = DAI_FMT_BASE;
 459
 460         /* Diversify the card configurations */
 461         if (of_device_is_compatible(np, "fsl,imx-audio-cs42888")) {
 462                 priv->card.set_bias_level = NULL;
 463                 priv->cpu_priv.sysclk_freq[TX] = priv->codec_priv.mclk_freq;
 464                 priv->cpu_priv.sysclk_freq[RX] = priv->codec_priv.mclk_freq;
 465                 priv->cpu_priv.sysclk_dir[TX] = SND_SOC_CLOCK_OUT;
 466                 priv->cpu_priv.sysclk_dir[RX] = SND_SOC_CLOCK_OUT;
 467                 priv->cpu_priv.slot_width = 32;
 468                 priv->dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
 469         } else if (of_device_is_compatible(np, "fsl,imx-audio-sgtl5000")) {
 470                 priv->codec_priv.mclk_id = SGTL5000_SYSCLK;
 471                 priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 472         } else if (of_device_is_compatible(np, "fsl,imx-audio-wm8962")) {
 473                 priv->card.set_bias_level = fsl_asoc_card_set_bias_level;
 474                 priv->codec_priv.mclk_id = WM8962_SYSCLK_MCLK;
 475                 priv->codec_priv.fll_id = WM8962_SYSCLK_FLL;
 476                 priv->codec_priv.pll_id = WM8962_FLL;
 477                 priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 478         } else {
 479                 dev_err(&pdev->dev, "unknown Device Tree compatible\n");
 480                 return -EINVAL;
 481         }
 482
 483         /* Common settings for corresponding Freescale CPU DAI driver */
 484         if (strstr(cpu_np->name, "ssi")) {
 485                 /* Only SSI needs to configure AUDMUX */
 486                 ret = fsl_asoc_card_audmux_init(np, priv);
 487                 if (ret) {
 488                         dev_err(&pdev->dev, "failed to init audmux\n");
 489                         goto asrc_fail;
 490                 }
 491         } else if (strstr(cpu_np->name, "esai")) {
 492                 priv->cpu_priv.sysclk_id[1] = ESAI_HCKT_EXTAL;
 493                 priv->cpu_priv.sysclk_id[0] = ESAI_HCKR_EXTAL;
 494         } else if (strstr(cpu_np->name, "sai")) {
 495                 priv->cpu_priv.sysclk_id[1] = FSL_SAI_CLK_MAST1;
 496                 priv->cpu_priv.sysclk_id[0] = FSL_SAI_CLK_MAST1;
 497         }
 498
 499         sprintf(priv->name, "%s-audio", codec_dev->name);
 500
 501         /* Initialize sound card */
 502         priv->pdev = pdev;
 503         priv->card.dev = &pdev->dev;
 504         priv->card.name = priv->name;
 505         priv->card.dai_link = priv->dai_link;
 506         priv->card.dapm_routes = audio_map;
 507         priv->card.late_probe = fsl_asoc_card_late_probe;
 508         priv->card.num_dapm_routes = ARRAY_SIZE(audio_map);
 509         priv->card.dapm_widgets = fsl_asoc_card_dapm_widgets;
 510         priv->card.num_dapm_widgets = ARRAY_SIZE(fsl_asoc_card_dapm_widgets);
 511
 512         memcpy(priv->dai_link, fsl_asoc_card_dai,
 513                sizeof(struct snd_soc_dai_link) * ARRAY_SIZE(priv->dai_link));
 514
 515         ret = snd_soc_of_parse_audio_routing(&priv->card, "audio-routing");
 516         if (ret) {
 517                 dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
 518                 goto asrc_fail;
 519         }
 520
 521         /* Normal DAI Link */
 522         priv->dai_link[0].cpu_of_node = cpu_np;
 523         priv->dai_link[0].codec_of_node = codec_np;
 524         priv->dai_link[0].codec_dai_name = codec_dev->name;
 525         priv->dai_link[0].platform_of_node = cpu_np;
 526         priv->dai_link[0].dai_fmt = priv->dai_fmt;
 527         priv->card.num_links = 1;
 528
 529         if (asrc_pdev) {
 530                 /* DPCM DAI Links only if ASRC exsits */
 531                 priv->dai_link[1].cpu_of_node = asrc_np;
 532                 priv->dai_link[1].platform_of_node = asrc_np;
 533                 priv->dai_link[2].codec_dai_name = codec_dev->name;
 534                 priv->dai_link[2].codec_of_node = codec_np;
 535                 priv->dai_link[2].cpu_of_node = cpu_np;
 536                 priv->dai_link[2].dai_fmt = priv->dai_fmt;
 537                 priv->card.num_links = 3;
 538
 539                 ret = of_property_read_u32(asrc_np, "fsl,asrc-rate",
 540                                            &priv->asrc_rate);
 541                 if (ret) {
 542                         dev_err(&pdev->dev, "failed to get output rate\n");
 543                         ret = -EINVAL;
 544                         goto asrc_fail;
 545                 }
 546
 547                 ret = of_property_read_u32(asrc_np, "fsl,asrc-width", &width);
 548                 if (ret) {
 549                         dev_err(&pdev->dev, "failed to get output rate\n");
 550                         ret = -EINVAL;
 551                         goto asrc_fail;
 552                 }
 553
 554                 if (width == 24)
 555                         priv->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
 556                 else
 557                         priv->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
 558         }
 559
 560         /* Finish card registering */
 561         platform_set_drvdata(pdev, priv);
 562         snd_soc_card_set_drvdata(&priv->card, priv);
 563
 564         ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
 565         if (ret)
 566                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 567
 568 asrc_fail:
 569         of_node_put(asrc_np);
 570 fail:
 571         of_node_put(codec_np);
 572         of_node_put(cpu_np);
 573
 574         return ret;
 575 }
 576
 577 static const struct of_device_id fsl_asoc_card_dt_ids[] = {
 578         { .compatible = "fsl,imx-audio-cs42888", },
 579         { .compatible = "fsl,imx-audio-sgtl5000", },
 580         { .compatible = "fsl,imx-audio-wm8962", },
 581         {}
 582 };
 583
 584 static struct platform_driver fsl_asoc_card_driver = {
 585         .probe = fsl_asoc_card_probe,
 586         .driver = {
 587                 .name = "fsl-asoc-card",
 588                 .pm = &snd_soc_pm_ops,
 589                 .of_match_table = fsl_asoc_card_dt_ids,
 590         },
 591 };
 592 module_platform_driver(fsl_asoc_card_driver);
 593
 594 MODULE_DESCRIPTION("Freescale Generic ASoC Sound Card driver with ASRC");
 595 MODULE_AUTHOR("Nicolin Chen <nicoleotsuka@gmail.com>");
 596 MODULE_ALIAS("platform:fsl-asoc-card");
 597 MODULE_LICENSE("GPL");