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 #include "../codecs/wm8960.h"
  27
  28 #define RX 0
  29 #define TX 1
  30
  31 /* Default DAI format without Master and Slave flag */
  32 #define DAI_FMT_BASE (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF)
  33
  34 /**
  35  * CODEC private data
  36  *
  37  * @mclk_freq: Clock rate of MCLK
  38  * @mclk_id: MCLK (or main clock) id for set_sysclk()
  39  * @fll_id: FLL (or secordary clock) id for set_sysclk()
  40  * @pll_id: PLL id for set_pll()
  41  */
  42 struct codec_priv {
  43         unsigned long mclk_freq;
  44         u32 mclk_id;
  45         u32 fll_id;
  46         u32 pll_id;
  47 };
  48
  49 /**
  50  * CPU private data
  51  *
  52  * @sysclk_freq[2]: SYSCLK rates for set_sysclk()
  53  * @sysclk_dir[2]: SYSCLK directions for set_sysclk()
  54  * @sysclk_id[2]: SYSCLK ids for set_sysclk()
  55  * @slot_width: Slot width of each frame
  56  *
  57  * Note: [1] for tx and [0] for rx
  58  */
  59 struct cpu_priv {
  60         unsigned long sysclk_freq[2];
  61         u32 sysclk_dir[2];
  62         u32 sysclk_id[2];
  63         u32 slot_width;
  64 };
  65
  66 /**
  67  * Freescale Generic ASOC card private data
  68  *
  69  * @dai_link[3]: DAI link structure including normal one and DPCM link
  70  * @pdev: platform device pointer
  71  * @codec_priv: CODEC private data
  72  * @cpu_priv: CPU private data
  73  * @card: ASoC card structure
  74  * @sample_rate: Current sample rate
  75  * @sample_format: Current sample format
  76  * @asrc_rate: ASRC sample rate used by Back-Ends
  77  * @asrc_format: ASRC sample format used by Back-Ends
  78  * @dai_fmt: DAI format between CPU and CODEC
  79  * @name: Card name
  80  */
  81
  82 struct fsl_asoc_card_priv {
  83         struct snd_soc_dai_link dai_link[3];
  84         struct platform_device *pdev;
  85         struct codec_priv codec_priv;
  86         struct cpu_priv cpu_priv;
  87         struct snd_soc_card card;
  88         u32 sample_rate;
  89         u32 sample_format;
  90         u32 asrc_rate;
  91         u32 asrc_format;
  92         u32 dai_fmt;
  93         char name[32];
  94 };
  95
  96 /**
  97  * This dapm route map exsits for DPCM link only.
  98  * The other routes shall go through Device Tree.
  99  */
 100 static const struct snd_soc_dapm_route audio_map[] = {
 101         {"CPU-Playback",  NULL, "ASRC-Playback"},
 102         {"Playback",  NULL, "CPU-Playback"},
 103         {"ASRC-Capture",  NULL, "CPU-Capture"},
 104         {"CPU-Capture",  NULL, "Capture"},
 105 };
 106
 107 /* Add all possible widgets into here without being redundant */
 108 static const struct snd_soc_dapm_widget fsl_asoc_card_dapm_widgets[] = {
 109         SND_SOC_DAPM_LINE("Line Out Jack", NULL),
 110         SND_SOC_DAPM_LINE("Line In Jack", NULL),
 111         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 112         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 113         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 114         SND_SOC_DAPM_MIC("AMIC", NULL),
 115         SND_SOC_DAPM_MIC("DMIC", NULL),
 116 };
 117
 118 static int fsl_asoc_card_hw_params(struct snd_pcm_substream *substream,
 119                                    struct snd_pcm_hw_params *params)
 120 {
 121         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 122         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 123         bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 124         struct cpu_priv *cpu_priv = &priv->cpu_priv;
 125         struct device *dev = rtd->card->dev;
 126         int ret;
 127
 128         priv->sample_rate = params_rate(params);
 129         priv->sample_format = params_format(params);
 130
 131         /*
 132          * If codec-dai is DAI Master and all configurations are already in the
 133          * set_bias_level(), bypass the remaining settings in hw_params().
 134          * Note: (dai_fmt & CBM_CFM) includes CBM_CFM and CBM_CFS.
 135          */
 136         if (priv->card.set_bias_level && priv->dai_fmt & SND_SOC_DAIFMT_CBM_CFM)
 137                 return 0;
 138
 139         /* Specific configurations of DAIs starts from here */
 140         ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, cpu_priv->sysclk_id[tx],
 141                                      cpu_priv->sysclk_freq[tx],
 142                                      cpu_priv->sysclk_dir[tx]);
 143         if (ret) {
 144                 dev_err(dev, "failed to set sysclk for cpu dai\n");
 145                 return ret;
 146         }
 147
 148         if (cpu_priv->slot_width) {
 149                 ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, 2,
 150                                                cpu_priv->slot_width);
 151                 if (ret) {
 152                         dev_err(dev, "failed to set TDM slot for cpu dai\n");
 153                         return ret;
 154                 }
 155         }
 156
 157         return 0;
 158 }
 159
 160 static struct snd_soc_ops fsl_asoc_card_ops = {
 161         .hw_params = fsl_asoc_card_hw_params,
 162 };
 163
 164 static int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
 165                               struct snd_pcm_hw_params *params)
 166 {
 167         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 168         struct snd_interval *rate;
 169         struct snd_mask *mask;
 170
 171         rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 172         rate->max = rate->min = priv->asrc_rate;
 173
 174         mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 175         snd_mask_none(mask);
 176         snd_mask_set(mask, priv->asrc_format);
 177
 178         return 0;
 179 }
 180
 181 static struct snd_soc_dai_link fsl_asoc_card_dai[] = {
 182         /* Default ASoC DAI Link*/
 183         {
 184                 .name = "HiFi",
 185                 .stream_name = "HiFi",
 186                 .ops = &fsl_asoc_card_ops,
 187         },
 188         /* DPCM Link between Front-End and Back-End (Optional) */
 189         {
 190                 .name = "HiFi-ASRC-FE",
 191                 .stream_name = "HiFi-ASRC-FE",
 192                 .codec_name = "snd-soc-dummy",
 193                 .codec_dai_name = "snd-soc-dummy-dai",
 194                 .dpcm_playback = 1,
 195                 .dpcm_capture = 1,
 196                 .dynamic = 1,
 197         },
 198         {
 199                 .name = "HiFi-ASRC-BE",
 200                 .stream_name = "HiFi-ASRC-BE",
 201                 .platform_name = "snd-soc-dummy",
 202                 .be_hw_params_fixup = be_hw_params_fixup,
 203                 .ops = &fsl_asoc_card_ops,
 204                 .dpcm_playback = 1,
 205                 .dpcm_capture = 1,
 206                 .no_pcm = 1,
 207         },
 208 };
 209
 210 static int fsl_asoc_card_set_bias_level(struct snd_soc_card *card,
 211                                         struct snd_soc_dapm_context *dapm,
 212                                         enum snd_soc_bias_level level)
 213 {
 214         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(card);
 215         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
 216         struct codec_priv *codec_priv = &priv->codec_priv;
 217         struct device *dev = card->dev;
 218         unsigned int pll_out;
 219         int ret;
 220
 221         if (dapm->dev != codec_dai->dev)
 222                 return 0;
 223
 224         switch (level) {
 225         case SND_SOC_BIAS_PREPARE:
 226                 if (dapm->bias_level != SND_SOC_BIAS_STANDBY)
 227                         break;
 228
 229                 if (priv->sample_format == SNDRV_PCM_FORMAT_S24_LE)
 230                         pll_out = priv->sample_rate * 384;
 231                 else
 232                         pll_out = priv->sample_rate * 256;
 233
 234                 ret = snd_soc_dai_set_pll(codec_dai, codec_priv->pll_id,
 235                                           codec_priv->mclk_id,
 236                                           codec_priv->mclk_freq, pll_out);
 237                 if (ret) {
 238                         dev_err(dev, "failed to start FLL: %d\n", ret);
 239                         return ret;
 240                 }
 241
 242                 ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->fll_id,
 243                                              pll_out, SND_SOC_CLOCK_IN);
 244                 if (ret) {
 245                         dev_err(dev, "failed to set SYSCLK: %d\n", ret);
 246                         return ret;
 247                 }
 248                 break;
 249
 250         case SND_SOC_BIAS_STANDBY:
 251                 if (dapm->bias_level != SND_SOC_BIAS_PREPARE)
 252                         break;
 253
 254                 ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->mclk_id,
 255                                              codec_priv->mclk_freq,
 256                                              SND_SOC_CLOCK_IN);
 257                 if (ret) {
 258                         dev_err(dev, "failed to switch away from FLL: %d\n", ret);
 259                         return ret;
 260                 }
 261
 262                 ret = snd_soc_dai_set_pll(codec_dai, codec_priv->pll_id, 0, 0, 0);
 263                 if (ret) {
 264                         dev_err(dev, "failed to stop FLL: %d\n", ret);
 265                         return ret;
 266                 }
 267                 break;
 268
 269         default:
 270                 break;
 271         }
 272
 273         return 0;
 274 }
 275
 276 static int fsl_asoc_card_audmux_init(struct device_node *np,
 277                                      struct fsl_asoc_card_priv *priv)
 278 {
 279         struct device *dev = &priv->pdev->dev;
 280         u32 int_ptcr = 0, ext_ptcr = 0;
 281         int int_port, ext_port;
 282         int ret;
 283
 284         ret = of_property_read_u32(np, "mux-int-port", &int_port);
 285         if (ret) {
 286                 dev_err(dev, "mux-int-port missing or invalid\n");
 287                 return ret;
 288         }
 289         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
 290         if (ret) {
 291                 dev_err(dev, "mux-ext-port missing or invalid\n");
 292                 return ret;
 293         }
 294
 295         /*
 296          * The port numbering in the hardware manual starts at 1, while
 297          * the AUDMUX API expects it starts at 0.
 298          */
 299         int_port--;
 300         ext_port--;
 301
 302         /*
 303          * Use asynchronous mode (6 wires) for all cases.
 304          * If only 4 wires are needed, just set SSI into
 305          * synchronous mode and enable 4 PADs in IOMUX.
 306          */
 307         switch (priv->dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 308         case SND_SOC_DAIFMT_CBM_CFM:
 309                 int_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | ext_port) |
 310                            IMX_AUDMUX_V2_PTCR_RCSEL(8 | ext_port) |
 311                            IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 312                            IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 313                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 314                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 315                            IMX_AUDMUX_V2_PTCR_TFSDIR |
 316                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 317                 break;
 318         case SND_SOC_DAIFMT_CBM_CFS:
 319                 int_ptcr = IMX_AUDMUX_V2_PTCR_RCSEL(8 | ext_port) |
 320                            IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 321                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 322                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 323                 ext_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | int_port) |
 324                            IMX_AUDMUX_V2_PTCR_TFSEL(int_port) |
 325                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 326                            IMX_AUDMUX_V2_PTCR_TFSDIR;
 327                 break;
 328         case SND_SOC_DAIFMT_CBS_CFM:
 329                 int_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | ext_port) |
 330                            IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 331                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 332                            IMX_AUDMUX_V2_PTCR_TFSDIR;
 333                 ext_ptcr = IMX_AUDMUX_V2_PTCR_RCSEL(8 | int_port) |
 334                            IMX_AUDMUX_V2_PTCR_TCSEL(int_port) |
 335                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 336                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 337                 break;
 338         case SND_SOC_DAIFMT_CBS_CFS:
 339                 ext_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | int_port) |
 340                            IMX_AUDMUX_V2_PTCR_RCSEL(8 | int_port) |
 341                            IMX_AUDMUX_V2_PTCR_TFSEL(int_port) |
 342                            IMX_AUDMUX_V2_PTCR_TCSEL(int_port) |
 343                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 344                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 345                            IMX_AUDMUX_V2_PTCR_TFSDIR |
 346                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 347                 break;
 348         default:
 349                 return -EINVAL;
 350         }
 351
 352         /* Asynchronous mode can not be set along with RCLKDIR */
 353         ret = imx_audmux_v2_configure_port(int_port, 0,
 354                                            IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
 355         if (ret) {
 356                 dev_err(dev, "audmux internal port setup failed\n");
 357                 return ret;
 358         }
 359
 360         ret = imx_audmux_v2_configure_port(int_port, int_ptcr,
 361                                            IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
 362         if (ret) {
 363                 dev_err(dev, "audmux internal port setup failed\n");
 364                 return ret;
 365         }
 366
 367         ret = imx_audmux_v2_configure_port(ext_port, 0,
 368                                            IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
 369         if (ret) {
 370                 dev_err(dev, "audmux external port setup failed\n");
 371                 return ret;
 372         }
 373
 374         ret = imx_audmux_v2_configure_port(ext_port, ext_ptcr,
 375                                            IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
 376         if (ret) {
 377                 dev_err(dev, "audmux external port setup failed\n");
 378                 return ret;
 379         }
 380
 381         return 0;
 382 }
 383
 384 static int fsl_asoc_card_late_probe(struct snd_soc_card *card)
 385 {
 386         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(card);
 387         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
 388         struct codec_priv *codec_priv = &priv->codec_priv;
 389         struct device *dev = card->dev;
 390         int ret;
 391
 392         ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->mclk_id,
 393                                      codec_priv->mclk_freq, SND_SOC_CLOCK_IN);
 394         if (ret) {
 395                 dev_err(dev, "failed to set sysclk in %s\n", __func__);
 396                 return ret;
 397         }
 398
 399         return 0;
 400 }
 401
 402 static int fsl_asoc_card_probe(struct platform_device *pdev)
 403 {
 404         struct device_node *cpu_np, *codec_np, *asrc_np;
 405         struct device_node *np = pdev->dev.of_node;
 406         struct platform_device *asrc_pdev = NULL;
 407         struct platform_device *cpu_pdev;
 408         struct fsl_asoc_card_priv *priv;
 409         struct i2c_client *codec_dev;
 410         struct clk *codec_clk;
 411         const char *codec_dai_name;
 412         u32 width;
 413         int ret;
 414
 415         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 416         if (!priv)
 417                 return -ENOMEM;
 418
 419         cpu_np = of_parse_phandle(np, "audio-cpu", 0);
 420         /* Give a chance to old DT binding */
 421         if (!cpu_np)
 422                 cpu_np = of_parse_phandle(np, "ssi-controller", 0);
 423         codec_np = of_parse_phandle(np, "audio-codec", 0);
 424         if (!cpu_np || !codec_np) {
 425                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 426                 ret = -EINVAL;
 427                 goto fail;
 428         }
 429
 430         cpu_pdev = of_find_device_by_node(cpu_np);
 431         if (!cpu_pdev) {
 432                 dev_err(&pdev->dev, "failed to find CPU DAI device\n");
 433                 ret = -EINVAL;
 434                 goto fail;
 435         }
 436
 437         codec_dev = of_find_i2c_device_by_node(codec_np);
 438         if (!codec_dev) {
 439                 dev_err(&pdev->dev, "failed to find codec platform device\n");
 440                 ret = -EINVAL;
 441                 goto fail;
 442         }
 443
 444         asrc_np = of_parse_phandle(np, "audio-asrc", 0);
 445         if (asrc_np)
 446                 asrc_pdev = of_find_device_by_node(asrc_np);
 447
 448         /* Get the MCLK rate only, and leave it controlled by CODEC drivers */
 449         codec_clk = clk_get(&codec_dev->dev, NULL);
 450         if (!IS_ERR(codec_clk)) {
 451                 priv->codec_priv.mclk_freq = clk_get_rate(codec_clk);
 452                 clk_put(codec_clk);
 453         }
 454
 455         /* Default sample rate and format, will be updated in hw_params() */
 456         priv->sample_rate = 44100;
 457         priv->sample_format = SNDRV_PCM_FORMAT_S16_LE;
 458
 459         /* Assign a default DAI format, and allow each card to overwrite it */
 460         priv->dai_fmt = DAI_FMT_BASE;
 461
 462         /* Diversify the card configurations */
 463         if (of_device_is_compatible(np, "fsl,imx-audio-cs42888")) {
 464                 codec_dai_name = "cs42888";
 465                 priv->card.set_bias_level = NULL;
 466                 priv->cpu_priv.sysclk_freq[TX] = priv->codec_priv.mclk_freq;
 467                 priv->cpu_priv.sysclk_freq[RX] = priv->codec_priv.mclk_freq;
 468                 priv->cpu_priv.sysclk_dir[TX] = SND_SOC_CLOCK_OUT;
 469                 priv->cpu_priv.sysclk_dir[RX] = SND_SOC_CLOCK_OUT;
 470                 priv->cpu_priv.slot_width = 32;
 471                 priv->dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
 472         } else if (of_device_is_compatible(np, "fsl,imx-audio-sgtl5000")) {
 473                 codec_dai_name = "sgtl5000";
 474                 priv->codec_priv.mclk_id = SGTL5000_SYSCLK;
 475                 priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 476         } else if (of_device_is_compatible(np, "fsl,imx-audio-wm8962")) {
 477                 codec_dai_name = "wm8962";
 478                 priv->card.set_bias_level = fsl_asoc_card_set_bias_level;
 479                 priv->codec_priv.mclk_id = WM8962_SYSCLK_MCLK;
 480                 priv->codec_priv.fll_id = WM8962_SYSCLK_FLL;
 481                 priv->codec_priv.pll_id = WM8962_FLL;
 482                 priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 483         } else if (of_device_is_compatible(np, "fsl,imx-audio-wm8960")) {
 484                 codec_dai_name = "wm8960-hifi";
 485                 priv->card.set_bias_level = fsl_asoc_card_set_bias_level;
 486                 priv->codec_priv.fll_id = WM8960_SYSCLK_AUTO;
 487                 priv->codec_priv.pll_id = WM8960_SYSCLK_AUTO;
 488                 priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 489         } else {
 490                 dev_err(&pdev->dev, "unknown Device Tree compatible\n");
 491                 ret = -EINVAL;
 492                 goto asrc_fail;
 493         }
 494
 495         /* Common settings for corresponding Freescale CPU DAI driver */
 496         if (strstr(cpu_np->name, "ssi")) {
 497                 /* Only SSI needs to configure AUDMUX */
 498                 ret = fsl_asoc_card_audmux_init(np, priv);
 499                 if (ret) {
 500                         dev_err(&pdev->dev, "failed to init audmux\n");
 501                         goto asrc_fail;
 502                 }
 503         } else if (strstr(cpu_np->name, "esai")) {
 504                 priv->cpu_priv.sysclk_id[1] = ESAI_HCKT_EXTAL;
 505                 priv->cpu_priv.sysclk_id[0] = ESAI_HCKR_EXTAL;
 506         } else if (strstr(cpu_np->name, "sai")) {
 507                 priv->cpu_priv.sysclk_id[1] = FSL_SAI_CLK_MAST1;
 508                 priv->cpu_priv.sysclk_id[0] = FSL_SAI_CLK_MAST1;
 509         }
 510
 511         sprintf(priv->name, "%s-audio", codec_dev->name);
 512
 513         /* Initialize sound card */
 514         priv->pdev = pdev;
 515         priv->card.dev = &pdev->dev;
 516         priv->card.name = priv->name;
 517         priv->card.dai_link = priv->dai_link;
 518         priv->card.dapm_routes = audio_map;
 519         priv->card.late_probe = fsl_asoc_card_late_probe;
 520         priv->card.num_dapm_routes = ARRAY_SIZE(audio_map);
 521         priv->card.dapm_widgets = fsl_asoc_card_dapm_widgets;
 522         priv->card.num_dapm_widgets = ARRAY_SIZE(fsl_asoc_card_dapm_widgets);
 523
 524         memcpy(priv->dai_link, fsl_asoc_card_dai,
 525                sizeof(struct snd_soc_dai_link) * ARRAY_SIZE(priv->dai_link));
 526
 527         ret = snd_soc_of_parse_audio_routing(&priv->card, "audio-routing");
 528         if (ret) {
 529                 dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
 530                 goto asrc_fail;
 531         }
 532
 533         /* Normal DAI Link */
 534         priv->dai_link[0].cpu_of_node = cpu_np;
 535         priv->dai_link[0].codec_of_node = codec_np;
 536         priv->dai_link[0].codec_dai_name = codec_dai_name;
 537         priv->dai_link[0].platform_of_node = cpu_np;
 538         priv->dai_link[0].dai_fmt = priv->dai_fmt;
 539         priv->card.num_links = 1;
 540
 541         if (asrc_pdev) {
 542                 /* DPCM DAI Links only if ASRC exsits */
 543                 priv->dai_link[1].cpu_of_node = asrc_np;
 544                 priv->dai_link[1].platform_of_node = asrc_np;
 545                 priv->dai_link[2].codec_dai_name = codec_dai_name;
 546                 priv->dai_link[2].codec_of_node = codec_np;
 547                 priv->dai_link[2].cpu_of_node = cpu_np;
 548                 priv->dai_link[2].dai_fmt = priv->dai_fmt;
 549                 priv->card.num_links = 3;
 550
 551                 ret = of_property_read_u32(asrc_np, "fsl,asrc-rate",
 552                                            &priv->asrc_rate);
 553                 if (ret) {
 554                         dev_err(&pdev->dev, "failed to get output rate\n");
 555                         ret = -EINVAL;
 556                         goto asrc_fail;
 557                 }
 558
 559                 ret = of_property_read_u32(asrc_np, "fsl,asrc-width", &width);
 560                 if (ret) {
 561                         dev_err(&pdev->dev, "failed to get output rate\n");
 562                         ret = -EINVAL;
 563                         goto asrc_fail;
 564                 }
 565
 566                 if (width == 24)
 567                         priv->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
 568                 else
 569                         priv->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
 570         }
 571
 572         /* Finish card registering */
 573         platform_set_drvdata(pdev, priv);
 574         snd_soc_card_set_drvdata(&priv->card, priv);
 575
 576         ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
 577         if (ret)
 578                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 579
 580 asrc_fail:
 581         of_node_put(asrc_np);
 582 fail:
 583         of_node_put(codec_np);
 584         of_node_put(cpu_np);
 585
 586         return ret;
 587 }
 588
 589 static const struct of_device_id fsl_asoc_card_dt_ids[] = {
 590         { .compatible = "fsl,imx-audio-cs42888", },
 591         { .compatible = "fsl,imx-audio-sgtl5000", },
 592         { .compatible = "fsl,imx-audio-wm8962", },
 593         { .compatible = "fsl,imx-audio-wm8960", },
 594         {}
 595 };
 596
 597 static struct platform_driver fsl_asoc_card_driver = {
 598         .probe = fsl_asoc_card_probe,
 599         .driver = {
 600                 .name = "fsl-asoc-card",
 601                 .pm = &snd_soc_pm_ops,
 602                 .of_match_table = fsl_asoc_card_dt_ids,
 603         },
 604 };
 605 module_platform_driver(fsl_asoc_card_driver);
 606
 607 MODULE_DESCRIPTION("Freescale Generic ASoC Sound Card driver with ASRC");
 608 MODULE_AUTHOR("Nicolin Chen <nicoleotsuka@gmail.com>");
 609 MODULE_ALIAS("platform:fsl-asoc-card");
 610 MODULE_LICENSE("GPL");