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

DEFINITIONS

1. fsl_asoc_card_is_ac97
2. fsl_asoc_card_hw_params
3. be_hw_params_fixup
4. fsl_asoc_card_set_bias_level
5. fsl_asoc_card_audmux_init
6. fsl_asoc_card_late_probe
7. fsl_asoc_card_probe

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Freescale Generic ASoC Sound Card driver with ASRC
   4 //
   5 // Copyright (C) 2014 Freescale Semiconductor, Inc.
   6 //
   7 // Author: Nicolin Chen <nicoleotsuka@gmail.com>
   8 
   9 #include <linux/clk.h>
  10 #include <linux/i2c.h>
  11 #include <linux/module.h>
  12 #include <linux/of_platform.h>
  13 #if IS_ENABLED(CONFIG_SND_AC97_CODEC)
  14 #include <sound/ac97_codec.h>
  15 #endif
  16 #include <sound/pcm_params.h>
  17 #include <sound/soc.h>
  18 
  19 #include "fsl_esai.h"
  20 #include "fsl_sai.h"
  21 #include "imx-audmux.h"
  22 
  23 #include "../codecs/sgtl5000.h"
  24 #include "../codecs/wm8962.h"
  25 #include "../codecs/wm8960.h"
  26 
  27 #define CS427x_SYSCLK_MCLK 0
  28 
  29 #define RX 0
  30 #define TX 1
  31 
  32 /* Default DAI format without Master and Slave flag */
  33 #define DAI_FMT_BASE (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF)
  34 
  35 /**
  36  * CODEC private data
  37  *
  38  * @mclk_freq: Clock rate of MCLK
  39  * @mclk_id: MCLK (or main clock) id for set_sysclk()
  40  * @fll_id: FLL (or secordary clock) id for set_sysclk()
  41  * @pll_id: PLL id for set_pll()
  42  */
  43 struct codec_priv {
  44         unsigned long mclk_freq;
  45         u32 mclk_id;
  46         u32 fll_id;
  47         u32 pll_id;
  48 };
  49 
  50 /**
  51  * CPU private data
  52  *
  53  * @sysclk_freq[2]: SYSCLK rates for set_sysclk()
  54  * @sysclk_dir[2]: SYSCLK directions for set_sysclk()
  55  * @sysclk_id[2]: SYSCLK ids for set_sysclk()
  56  * @slot_width: Slot width of each frame
  57  *
  58  * Note: [1] for tx and [0] for rx
  59  */
  60 struct cpu_priv {
  61         unsigned long sysclk_freq[2];
  62         u32 sysclk_dir[2];
  63         u32 sysclk_id[2];
  64         u32 slot_width;
  65 };
  66 
  67 /**
  68  * Freescale Generic ASOC card private data
  69  *
  70  * @dai_link[3]: DAI link structure including normal one and DPCM link
  71  * @pdev: platform device pointer
  72  * @codec_priv: CODEC private data
  73  * @cpu_priv: CPU private data
  74  * @card: ASoC card structure
  75  * @sample_rate: Current sample rate
  76  * @sample_format: Current sample format
  77  * @asrc_rate: ASRC sample rate used by Back-Ends
  78  * @asrc_format: ASRC sample format used by Back-Ends
  79  * @dai_fmt: DAI format between CPU and CODEC
  80  * @name: Card name
  81  */
  82 
  83 struct fsl_asoc_card_priv {
  84         struct snd_soc_dai_link dai_link[3];
  85         struct platform_device *pdev;
  86         struct codec_priv codec_priv;
  87         struct cpu_priv cpu_priv;
  88         struct snd_soc_card card;
  89         u32 sample_rate;
  90         snd_pcm_format_t sample_format;
  91         u32 asrc_rate;
  92         snd_pcm_format_t asrc_format;
  93         u32 dai_fmt;
  94         char name[32];
  95 };
  96 
  97 /**
  98  * This dapm route map exsits for DPCM link only.
  99  * The other routes shall go through Device Tree.
 100  *
 101  * Note: keep all ASRC routes in the second half
 102  *       to drop them easily for non-ASRC cases.
 103  */
 104 static const struct snd_soc_dapm_route audio_map[] = {
 105         /* 1st half -- Normal DAPM routes */
 106         {"Playback",  NULL, "CPU-Playback"},
 107         {"CPU-Capture",  NULL, "Capture"},
 108         /* 2nd half -- ASRC DAPM routes */
 109         {"CPU-Playback",  NULL, "ASRC-Playback"},
 110         {"ASRC-Capture",  NULL, "CPU-Capture"},
 111 };
 112 
 113 static const struct snd_soc_dapm_route audio_map_ac97[] = {
 114         /* 1st half -- Normal DAPM routes */
 115         {"Playback",  NULL, "AC97 Playback"},
 116         {"AC97 Capture",  NULL, "Capture"},
 117         /* 2nd half -- ASRC DAPM routes */
 118         {"AC97 Playback",  NULL, "ASRC-Playback"},
 119         {"ASRC-Capture",  NULL, "AC97 Capture"},
 120 };
 121 
 122 /* Add all possible widgets into here without being redundant */
 123 static const struct snd_soc_dapm_widget fsl_asoc_card_dapm_widgets[] = {
 124         SND_SOC_DAPM_LINE("Line Out Jack", NULL),
 125         SND_SOC_DAPM_LINE("Line In Jack", NULL),
 126         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 127         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 128         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 129         SND_SOC_DAPM_MIC("AMIC", NULL),
 130         SND_SOC_DAPM_MIC("DMIC", NULL),
 131 };
 132 
 133 static bool fsl_asoc_card_is_ac97(struct fsl_asoc_card_priv *priv)
 134 {
 135         return priv->dai_fmt == SND_SOC_DAIFMT_AC97;
 136 }
 137 
 138 static int fsl_asoc_card_hw_params(struct snd_pcm_substream *substream,
 139                                    struct snd_pcm_hw_params *params)
 140 {
 141         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 142         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 143         bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 144         struct cpu_priv *cpu_priv = &priv->cpu_priv;
 145         struct device *dev = rtd->card->dev;
 146         int ret;
 147 
 148         priv->sample_rate = params_rate(params);
 149         priv->sample_format = params_format(params);
 150 
 151         /*
 152          * If codec-dai is DAI Master and all configurations are already in the
 153          * set_bias_level(), bypass the remaining settings in hw_params().
 154          * Note: (dai_fmt & CBM_CFM) includes CBM_CFM and CBM_CFS.
 155          */
 156         if ((priv->card.set_bias_level &&
 157              priv->dai_fmt & SND_SOC_DAIFMT_CBM_CFM) ||
 158             fsl_asoc_card_is_ac97(priv))
 159                 return 0;
 160 
 161         /* Specific configurations of DAIs starts from here */
 162         ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, cpu_priv->sysclk_id[tx],
 163                                      cpu_priv->sysclk_freq[tx],
 164                                      cpu_priv->sysclk_dir[tx]);
 165         if (ret && ret != -ENOTSUPP) {
 166                 dev_err(dev, "failed to set sysclk for cpu dai\n");
 167                 return ret;
 168         }
 169 
 170         if (cpu_priv->slot_width) {
 171                 ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, 2,
 172                                                cpu_priv->slot_width);
 173                 if (ret && ret != -ENOTSUPP) {
 174                         dev_err(dev, "failed to set TDM slot for cpu dai\n");
 175                         return ret;
 176                 }
 177         }
 178 
 179         return 0;
 180 }
 181 
 182 static const struct snd_soc_ops fsl_asoc_card_ops = {
 183         .hw_params = fsl_asoc_card_hw_params,
 184 };
 185 
 186 static int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
 187                               struct snd_pcm_hw_params *params)
 188 {
 189         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 190         struct snd_interval *rate;
 191         struct snd_mask *mask;
 192 
 193         rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 194         rate->max = rate->min = priv->asrc_rate;
 195 
 196         mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 197         snd_mask_none(mask);
 198         snd_mask_set_format(mask, priv->asrc_format);
 199 
 200         return 0;
 201 }
 202 
 203 SND_SOC_DAILINK_DEFS(hifi,
 204         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 205         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 206         DAILINK_COMP_ARRAY(COMP_EMPTY()));
 207 
 208 SND_SOC_DAILINK_DEFS(hifi_fe,
 209         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 210         DAILINK_COMP_ARRAY(COMP_DUMMY()),
 211         DAILINK_COMP_ARRAY(COMP_EMPTY()));
 212 
 213 SND_SOC_DAILINK_DEFS(hifi_be,
 214         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 215         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 216         DAILINK_COMP_ARRAY(COMP_DUMMY()));
 217 
 218 static struct snd_soc_dai_link fsl_asoc_card_dai[] = {
 219         /* Default ASoC DAI Link*/
 220         {
 221                 .name = "HiFi",
 222                 .stream_name = "HiFi",
 223                 .ops = &fsl_asoc_card_ops,
 224                 SND_SOC_DAILINK_REG(hifi),
 225         },
 226         /* DPCM Link between Front-End and Back-End (Optional) */
 227         {
 228                 .name = "HiFi-ASRC-FE",
 229                 .stream_name = "HiFi-ASRC-FE",
 230                 .dpcm_playback = 1,
 231                 .dpcm_capture = 1,
 232                 .dynamic = 1,
 233                 SND_SOC_DAILINK_REG(hifi_fe),
 234         },
 235         {
 236                 .name = "HiFi-ASRC-BE",
 237                 .stream_name = "HiFi-ASRC-BE",
 238                 .be_hw_params_fixup = be_hw_params_fixup,
 239                 .ops = &fsl_asoc_card_ops,
 240                 .dpcm_playback = 1,
 241                 .dpcm_capture = 1,
 242                 .no_pcm = 1,
 243                 SND_SOC_DAILINK_REG(hifi_be),
 244         },
 245 };
 246 
 247 static int fsl_asoc_card_set_bias_level(struct snd_soc_card *card,
 248                                         struct snd_soc_dapm_context *dapm,
 249                                         enum snd_soc_bias_level level)
 250 {
 251         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(card);
 252         struct snd_soc_pcm_runtime *rtd;
 253         struct snd_soc_dai *codec_dai;
 254         struct codec_priv *codec_priv = &priv->codec_priv;
 255         struct device *dev = card->dev;
 256         unsigned int pll_out;
 257         int ret;
 258 
 259         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 260         codec_dai = rtd->codec_dai;
 261         if (dapm->dev != codec_dai->dev)
 262                 return 0;
 263 
 264         switch (level) {
 265         case SND_SOC_BIAS_PREPARE:
 266                 if (dapm->bias_level != SND_SOC_BIAS_STANDBY)
 267                         break;
 268 
 269                 if (priv->sample_format == SNDRV_PCM_FORMAT_S24_LE)
 270                         pll_out = priv->sample_rate * 384;
 271                 else
 272                         pll_out = priv->sample_rate * 256;
 273 
 274                 ret = snd_soc_dai_set_pll(codec_dai, codec_priv->pll_id,
 275                                           codec_priv->mclk_id,
 276                                           codec_priv->mclk_freq, pll_out);
 277                 if (ret) {
 278                         dev_err(dev, "failed to start FLL: %d\n", ret);
 279                         return ret;
 280                 }
 281 
 282                 ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->fll_id,
 283                                              pll_out, SND_SOC_CLOCK_IN);
 284                 if (ret && ret != -ENOTSUPP) {
 285                         dev_err(dev, "failed to set SYSCLK: %d\n", ret);
 286                         return ret;
 287                 }
 288                 break;
 289 
 290         case SND_SOC_BIAS_STANDBY:
 291                 if (dapm->bias_level != SND_SOC_BIAS_PREPARE)
 292                         break;
 293 
 294                 ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->mclk_id,
 295                                              codec_priv->mclk_freq,
 296                                              SND_SOC_CLOCK_IN);
 297                 if (ret && ret != -ENOTSUPP) {
 298                         dev_err(dev, "failed to switch away from FLL: %d\n", ret);
 299                         return ret;
 300                 }
 301 
 302                 ret = snd_soc_dai_set_pll(codec_dai, codec_priv->pll_id, 0, 0, 0);
 303                 if (ret) {
 304                         dev_err(dev, "failed to stop FLL: %d\n", ret);
 305                         return ret;
 306                 }
 307                 break;
 308 
 309         default:
 310                 break;
 311         }
 312 
 313         return 0;
 314 }
 315 
 316 static int fsl_asoc_card_audmux_init(struct device_node *np,
 317                                      struct fsl_asoc_card_priv *priv)
 318 {
 319         struct device *dev = &priv->pdev->dev;
 320         u32 int_ptcr = 0, ext_ptcr = 0;
 321         int int_port, ext_port;
 322         int ret;
 323 
 324         ret = of_property_read_u32(np, "mux-int-port", &int_port);
 325         if (ret) {
 326                 dev_err(dev, "mux-int-port missing or invalid\n");
 327                 return ret;
 328         }
 329         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
 330         if (ret) {
 331                 dev_err(dev, "mux-ext-port missing or invalid\n");
 332                 return ret;
 333         }
 334 
 335         /*
 336          * The port numbering in the hardware manual starts at 1, while
 337          * the AUDMUX API expects it starts at 0.
 338          */
 339         int_port--;
 340         ext_port--;
 341 
 342         /*
 343          * Use asynchronous mode (6 wires) for all cases except AC97.
 344          * If only 4 wires are needed, just set SSI into
 345          * synchronous mode and enable 4 PADs in IOMUX.
 346          */
 347         switch (priv->dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 348         case SND_SOC_DAIFMT_CBM_CFM:
 349                 int_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | ext_port) |
 350                            IMX_AUDMUX_V2_PTCR_RCSEL(8 | ext_port) |
 351                            IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 352                            IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 353                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 354                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 355                            IMX_AUDMUX_V2_PTCR_TFSDIR |
 356                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 357                 break;
 358         case SND_SOC_DAIFMT_CBM_CFS:
 359                 int_ptcr = IMX_AUDMUX_V2_PTCR_RCSEL(8 | ext_port) |
 360                            IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 361                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 362                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 363                 ext_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | int_port) |
 364                            IMX_AUDMUX_V2_PTCR_TFSEL(int_port) |
 365                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 366                            IMX_AUDMUX_V2_PTCR_TFSDIR;
 367                 break;
 368         case SND_SOC_DAIFMT_CBS_CFM:
 369                 int_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | ext_port) |
 370                            IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 371                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 372                            IMX_AUDMUX_V2_PTCR_TFSDIR;
 373                 ext_ptcr = IMX_AUDMUX_V2_PTCR_RCSEL(8 | int_port) |
 374                            IMX_AUDMUX_V2_PTCR_TCSEL(int_port) |
 375                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 376                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 377                 break;
 378         case SND_SOC_DAIFMT_CBS_CFS:
 379                 ext_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | int_port) |
 380                            IMX_AUDMUX_V2_PTCR_RCSEL(8 | int_port) |
 381                            IMX_AUDMUX_V2_PTCR_TFSEL(int_port) |
 382                            IMX_AUDMUX_V2_PTCR_TCSEL(int_port) |
 383                            IMX_AUDMUX_V2_PTCR_RFSDIR |
 384                            IMX_AUDMUX_V2_PTCR_RCLKDIR |
 385                            IMX_AUDMUX_V2_PTCR_TFSDIR |
 386                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 387                 break;
 388         default:
 389                 if (!fsl_asoc_card_is_ac97(priv))
 390                         return -EINVAL;
 391         }
 392 
 393         if (fsl_asoc_card_is_ac97(priv)) {
 394                 int_ptcr = IMX_AUDMUX_V2_PTCR_SYN |
 395                            IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 396                            IMX_AUDMUX_V2_PTCR_TCLKDIR;
 397                 ext_ptcr = IMX_AUDMUX_V2_PTCR_SYN |
 398                            IMX_AUDMUX_V2_PTCR_TFSEL(int_port) |
 399                            IMX_AUDMUX_V2_PTCR_TFSDIR;
 400         }
 401 
 402         /* Asynchronous mode can not be set along with RCLKDIR */
 403         if (!fsl_asoc_card_is_ac97(priv)) {
 404                 unsigned int pdcr =
 405                                 IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port);
 406 
 407                 ret = imx_audmux_v2_configure_port(int_port, 0,
 408                                                    pdcr);
 409                 if (ret) {
 410                         dev_err(dev, "audmux internal port setup failed\n");
 411                         return ret;
 412                 }
 413         }
 414 
 415         ret = imx_audmux_v2_configure_port(int_port, int_ptcr,
 416                                            IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
 417         if (ret) {
 418                 dev_err(dev, "audmux internal port setup failed\n");
 419                 return ret;
 420         }
 421 
 422         if (!fsl_asoc_card_is_ac97(priv)) {
 423                 unsigned int pdcr =
 424                                 IMX_AUDMUX_V2_PDCR_RXDSEL(int_port);
 425 
 426                 ret = imx_audmux_v2_configure_port(ext_port, 0,
 427                                                    pdcr);
 428                 if (ret) {
 429                         dev_err(dev, "audmux external port setup failed\n");
 430                         return ret;
 431                 }
 432         }
 433 
 434         ret = imx_audmux_v2_configure_port(ext_port, ext_ptcr,
 435                                            IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
 436         if (ret) {
 437                 dev_err(dev, "audmux external port setup failed\n");
 438                 return ret;
 439         }
 440 
 441         return 0;
 442 }
 443 
 444 static int fsl_asoc_card_late_probe(struct snd_soc_card *card)
 445 {
 446         struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(card);
 447         struct snd_soc_pcm_runtime *rtd = list_first_entry(
 448                         &card->rtd_list, struct snd_soc_pcm_runtime, list);
 449         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 450         struct codec_priv *codec_priv = &priv->codec_priv;
 451         struct device *dev = card->dev;
 452         int ret;
 453 
 454         if (fsl_asoc_card_is_ac97(priv)) {
 455 #if IS_ENABLED(CONFIG_SND_AC97_CODEC)
 456                 struct snd_soc_component *component = rtd->codec_dai->component;
 457                 struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component);
 458 
 459                 /*
 460                  * Use slots 3/4 for S/PDIF so SSI won't try to enable
 461                  * other slots and send some samples there
 462                  * due to SLOTREQ bits for S/PDIF received from codec
 463                  */
 464                 snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS,
 465                                      AC97_EA_SPSA_SLOT_MASK, AC97_EA_SPSA_3_4);
 466 #endif
 467 
 468                 return 0;
 469         }
 470 
 471         ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->mclk_id,
 472                                      codec_priv->mclk_freq, SND_SOC_CLOCK_IN);
 473         if (ret && ret != -ENOTSUPP) {
 474                 dev_err(dev, "failed to set sysclk in %s\n", __func__);
 475                 return ret;
 476         }
 477 
 478         return 0;
 479 }
 480 
 481 static int fsl_asoc_card_probe(struct platform_device *pdev)
 482 {
 483         struct device_node *cpu_np, *codec_np, *asrc_np;
 484         struct device_node *np = pdev->dev.of_node;
 485         struct platform_device *asrc_pdev = NULL;
 486         struct platform_device *cpu_pdev;
 487         struct fsl_asoc_card_priv *priv;
 488         struct i2c_client *codec_dev;
 489         const char *codec_dai_name;
 490         u32 width;
 491         int ret;
 492 
 493         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 494         if (!priv)
 495                 return -ENOMEM;
 496 
 497         cpu_np = of_parse_phandle(np, "audio-cpu", 0);
 498         /* Give a chance to old DT binding */
 499         if (!cpu_np)
 500                 cpu_np = of_parse_phandle(np, "ssi-controller", 0);
 501         if (!cpu_np) {
 502                 dev_err(&pdev->dev, "CPU phandle missing or invalid\n");
 503                 ret = -EINVAL;
 504                 goto fail;
 505         }
 506 
 507         cpu_pdev = of_find_device_by_node(cpu_np);
 508         if (!cpu_pdev) {
 509                 dev_err(&pdev->dev, "failed to find CPU DAI device\n");
 510                 ret = -EINVAL;
 511                 goto fail;
 512         }
 513 
 514         codec_np = of_parse_phandle(np, "audio-codec", 0);
 515         if (codec_np)
 516                 codec_dev = of_find_i2c_device_by_node(codec_np);
 517         else
 518                 codec_dev = NULL;
 519 
 520         asrc_np = of_parse_phandle(np, "audio-asrc", 0);
 521         if (asrc_np)
 522                 asrc_pdev = of_find_device_by_node(asrc_np);
 523 
 524         /* Get the MCLK rate only, and leave it controlled by CODEC drivers */
 525         if (codec_dev) {
 526                 struct clk *codec_clk = clk_get(&codec_dev->dev, NULL);
 527 
 528                 if (!IS_ERR(codec_clk)) {
 529                         priv->codec_priv.mclk_freq = clk_get_rate(codec_clk);
 530                         clk_put(codec_clk);
 531                 }
 532         }
 533 
 534         /* Default sample rate and format, will be updated in hw_params() */
 535         priv->sample_rate = 44100;
 536         priv->sample_format = SNDRV_PCM_FORMAT_S16_LE;
 537 
 538         /* Assign a default DAI format, and allow each card to overwrite it */
 539         priv->dai_fmt = DAI_FMT_BASE;
 540 
 541         /* Diversify the card configurations */
 542         if (of_device_is_compatible(np, "fsl,imx-audio-cs42888")) {
 543                 codec_dai_name = "cs42888";
 544                 priv->card.set_bias_level = NULL;
 545                 priv->cpu_priv.sysclk_freq[TX] = priv->codec_priv.mclk_freq;
 546                 priv->cpu_priv.sysclk_freq[RX] = priv->codec_priv.mclk_freq;
 547                 priv->cpu_priv.sysclk_dir[TX] = SND_SOC_CLOCK_OUT;
 548                 priv->cpu_priv.sysclk_dir[RX] = SND_SOC_CLOCK_OUT;
 549                 priv->cpu_priv.slot_width = 32;
 550                 priv->dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
 551         } else if (of_device_is_compatible(np, "fsl,imx-audio-cs427x")) {
 552                 codec_dai_name = "cs4271-hifi";
 553                 priv->codec_priv.mclk_id = CS427x_SYSCLK_MCLK;
 554                 priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 555         } else if (of_device_is_compatible(np, "fsl,imx-audio-sgtl5000")) {
 556                 codec_dai_name = "sgtl5000";
 557                 priv->codec_priv.mclk_id = SGTL5000_SYSCLK;
 558                 priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 559         } else if (of_device_is_compatible(np, "fsl,imx-audio-wm8962")) {
 560                 codec_dai_name = "wm8962";
 561                 priv->card.set_bias_level = fsl_asoc_card_set_bias_level;
 562                 priv->codec_priv.mclk_id = WM8962_SYSCLK_MCLK;
 563                 priv->codec_priv.fll_id = WM8962_SYSCLK_FLL;
 564                 priv->codec_priv.pll_id = WM8962_FLL;
 565                 priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 566         } else if (of_device_is_compatible(np, "fsl,imx-audio-wm8960")) {
 567                 codec_dai_name = "wm8960-hifi";
 568                 priv->card.set_bias_level = fsl_asoc_card_set_bias_level;
 569                 priv->codec_priv.fll_id = WM8960_SYSCLK_AUTO;
 570                 priv->codec_priv.pll_id = WM8960_SYSCLK_AUTO;
 571                 priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 572         } else if (of_device_is_compatible(np, "fsl,imx-audio-ac97")) {
 573                 codec_dai_name = "ac97-hifi";
 574                 priv->card.set_bias_level = NULL;
 575                 priv->dai_fmt = SND_SOC_DAIFMT_AC97;
 576         } else {
 577                 dev_err(&pdev->dev, "unknown Device Tree compatible\n");
 578                 ret = -EINVAL;
 579                 goto asrc_fail;
 580         }
 581 
 582         if (!fsl_asoc_card_is_ac97(priv) && !codec_dev) {
 583                 dev_err(&pdev->dev, "failed to find codec device\n");
 584                 ret = -EINVAL;
 585                 goto asrc_fail;
 586         }
 587 
 588         /* Common settings for corresponding Freescale CPU DAI driver */
 589         if (of_node_name_eq(cpu_np, "ssi")) {
 590                 /* Only SSI needs to configure AUDMUX */
 591                 ret = fsl_asoc_card_audmux_init(np, priv);
 592                 if (ret) {
 593                         dev_err(&pdev->dev, "failed to init audmux\n");
 594                         goto asrc_fail;
 595                 }
 596         } else if (of_node_name_eq(cpu_np, "esai")) {
 597                 priv->cpu_priv.sysclk_id[1] = ESAI_HCKT_EXTAL;
 598                 priv->cpu_priv.sysclk_id[0] = ESAI_HCKR_EXTAL;
 599         } else if (of_node_name_eq(cpu_np, "sai")) {
 600                 priv->cpu_priv.sysclk_id[1] = FSL_SAI_CLK_MAST1;
 601                 priv->cpu_priv.sysclk_id[0] = FSL_SAI_CLK_MAST1;
 602         }
 603 
 604         snprintf(priv->name, sizeof(priv->name), "%s-audio",
 605                  fsl_asoc_card_is_ac97(priv) ? "ac97" :
 606                  codec_dev->name);
 607 
 608         /* Initialize sound card */
 609         priv->pdev = pdev;
 610         priv->card.dev = &pdev->dev;
 611         priv->card.name = priv->name;
 612         priv->card.dai_link = priv->dai_link;
 613         priv->card.dapm_routes = fsl_asoc_card_is_ac97(priv) ?
 614                                  audio_map_ac97 : audio_map;
 615         priv->card.late_probe = fsl_asoc_card_late_probe;
 616         priv->card.num_dapm_routes = ARRAY_SIZE(audio_map);
 617         priv->card.dapm_widgets = fsl_asoc_card_dapm_widgets;
 618         priv->card.num_dapm_widgets = ARRAY_SIZE(fsl_asoc_card_dapm_widgets);
 619 
 620         /* Drop the second half of DAPM routes -- ASRC */
 621         if (!asrc_pdev)
 622                 priv->card.num_dapm_routes /= 2;
 623 
 624         memcpy(priv->dai_link, fsl_asoc_card_dai,
 625                sizeof(struct snd_soc_dai_link) * ARRAY_SIZE(priv->dai_link));
 626 
 627         ret = snd_soc_of_parse_audio_routing(&priv->card, "audio-routing");
 628         if (ret) {
 629                 dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
 630                 goto asrc_fail;
 631         }
 632 
 633         /* Normal DAI Link */
 634         priv->dai_link[0].cpus->of_node = cpu_np;
 635         priv->dai_link[0].codecs->dai_name = codec_dai_name;
 636 
 637         if (!fsl_asoc_card_is_ac97(priv))
 638                 priv->dai_link[0].codecs->of_node = codec_np;
 639         else {
 640                 u32 idx;
 641 
 642                 ret = of_property_read_u32(cpu_np, "cell-index", &idx);
 643                 if (ret) {
 644                         dev_err(&pdev->dev,
 645                                 "cannot get CPU index property\n");
 646                         goto asrc_fail;
 647                 }
 648 
 649                 priv->dai_link[0].codecs->name =
 650                                 devm_kasprintf(&pdev->dev, GFP_KERNEL,
 651                                                "ac97-codec.%u",
 652                                                (unsigned int)idx);
 653                 if (!priv->dai_link[0].codecs->name) {
 654                         ret = -ENOMEM;
 655                         goto asrc_fail;
 656                 }
 657         }
 658 
 659         priv->dai_link[0].platforms->of_node = cpu_np;
 660         priv->dai_link[0].dai_fmt = priv->dai_fmt;
 661         priv->card.num_links = 1;
 662 
 663         if (asrc_pdev) {
 664                 /* DPCM DAI Links only if ASRC exsits */
 665                 priv->dai_link[1].cpus->of_node = asrc_np;
 666                 priv->dai_link[1].platforms->of_node = asrc_np;
 667                 priv->dai_link[2].codecs->dai_name = codec_dai_name;
 668                 priv->dai_link[2].codecs->of_node = codec_np;
 669                 priv->dai_link[2].codecs->name =
 670                                 priv->dai_link[0].codecs->name;
 671                 priv->dai_link[2].cpus->of_node = cpu_np;
 672                 priv->dai_link[2].dai_fmt = priv->dai_fmt;
 673                 priv->card.num_links = 3;
 674 
 675                 ret = of_property_read_u32(asrc_np, "fsl,asrc-rate",
 676                                            &priv->asrc_rate);
 677                 if (ret) {
 678                         dev_err(&pdev->dev, "failed to get output rate\n");
 679                         ret = -EINVAL;
 680                         goto asrc_fail;
 681                 }
 682 
 683                 ret = of_property_read_u32(asrc_np, "fsl,asrc-width", &width);
 684                 if (ret) {
 685                         dev_err(&pdev->dev, "failed to get output rate\n");
 686                         ret = -EINVAL;
 687                         goto asrc_fail;
 688                 }
 689 
 690                 if (width == 24)
 691                         priv->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
 692                 else
 693                         priv->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
 694         }
 695 
 696         /* Finish card registering */
 697         platform_set_drvdata(pdev, priv);
 698         snd_soc_card_set_drvdata(&priv->card, priv);
 699 
 700         ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
 701         if (ret && ret != -EPROBE_DEFER)
 702                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 703 
 704 asrc_fail:
 705         of_node_put(asrc_np);
 706         of_node_put(codec_np);
 707         put_device(&cpu_pdev->dev);
 708 fail:
 709         of_node_put(cpu_np);
 710 
 711         return ret;
 712 }
 713 
 714 static const struct of_device_id fsl_asoc_card_dt_ids[] = {
 715         { .compatible = "fsl,imx-audio-ac97", },
 716         { .compatible = "fsl,imx-audio-cs42888", },
 717         { .compatible = "fsl,imx-audio-cs427x", },
 718         { .compatible = "fsl,imx-audio-sgtl5000", },
 719         { .compatible = "fsl,imx-audio-wm8962", },
 720         { .compatible = "fsl,imx-audio-wm8960", },
 721         {}
 722 };
 723 MODULE_DEVICE_TABLE(of, fsl_asoc_card_dt_ids);
 724 
 725 static struct platform_driver fsl_asoc_card_driver = {
 726         .probe = fsl_asoc_card_probe,
 727         .driver = {
 728                 .name = "fsl-asoc-card",
 729                 .pm = &snd_soc_pm_ops,
 730                 .of_match_table = fsl_asoc_card_dt_ids,
 731         },
 732 };
 733 module_platform_driver(fsl_asoc_card_driver);
 734 
 735 MODULE_DESCRIPTION("Freescale Generic ASoC Sound Card driver with ASRC");
 736 MODULE_AUTHOR("Nicolin Chen <nicoleotsuka@gmail.com>");
 737 MODULE_ALIAS("platform:fsl-asoc-card");
 738 MODULE_LICENSE("GPL");