sound/soc/fsl/imx-audmix.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright 2017 NXP
   4  *
   5  * The code contained herein is licensed under the GNU General Public
   6  * License. You may obtain a copy of the GNU General Public License
   7  * Version 2 or later at the following locations:
   8  *
   9  * https://www.opensource.org/licenses/gpl-license.html
  10  * https://www.gnu.org/copyleft/gpl.html
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/of_platform.h>
  15 #include <linux/clk.h>
  16 #include <sound/soc.h>
  17 #include <sound/soc-dapm.h>
  18 #include "fsl_sai.h"
  19 #include "fsl_audmix.h"
  20
  21 struct imx_audmix {
  22         struct platform_device *pdev;
  23         struct snd_soc_card card;
  24         struct platform_device *audmix_pdev;
  25         struct platform_device *out_pdev;
  26         struct clk *cpu_mclk;
  27         int num_dai;
  28         struct snd_soc_dai_link *dai;
  29         int num_dai_conf;
  30         struct snd_soc_codec_conf *dai_conf;
  31         int num_dapm_routes;
  32         struct snd_soc_dapm_route *dapm_routes;
  33 };
  34
  35 static const u32 imx_audmix_rates[] = {
  36         8000, 12000, 16000, 24000, 32000, 48000, 64000, 96000,
  37 };
  38
  39 static const struct snd_pcm_hw_constraint_list imx_audmix_rate_constraints = {
  40         .count = ARRAY_SIZE(imx_audmix_rates),
  41         .list = imx_audmix_rates,
  42 };
  43
  44 static int imx_audmix_fe_startup(struct snd_pcm_substream *substream)
  45 {
  46         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
  47         struct imx_audmix *priv = snd_soc_card_get_drvdata(rtd->card);
  48         struct snd_pcm_runtime *runtime = substream->runtime;
  49         struct device *dev = rtd->card->dev;
  50         unsigned long clk_rate = clk_get_rate(priv->cpu_mclk);
  51         int ret;
  52
  53         if (clk_rate % 24576000 == 0) {
  54                 ret = snd_pcm_hw_constraint_list(runtime, 0,
  55                                                  SNDRV_PCM_HW_PARAM_RATE,
  56                                                  &imx_audmix_rate_constraints);
  57                 if (ret < 0)
  58                         return ret;
  59         } else {
  60                 dev_warn(dev, "mclk may be not supported %lu\n", clk_rate);
  61         }
  62
  63         ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
  64                                            1, 8);
  65         if (ret < 0)
  66                 return ret;
  67
  68         return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT,
  69                                             FSL_AUDMIX_FORMATS);
  70 }
  71
  72 static int imx_audmix_fe_hw_params(struct snd_pcm_substream *substream,
  73                                    struct snd_pcm_hw_params *params)
  74 {
  75         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
  76         struct device *dev = rtd->card->dev;
  77         bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
  78         unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
  79         u32 channels = params_channels(params);
  80         int ret, dir;
  81
  82         /* For playback the AUDMIX is consumer, and for record is provider */
  83         fmt |= tx ? SND_SOC_DAIFMT_BP_FP : SND_SOC_DAIFMT_BC_FC;
  84         dir  = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN;
  85
  86         /* set DAI configuration */
  87         ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt);
  88         if (ret) {
  89                 dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
  90                 return ret;
  91         }
  92
  93         ret = snd_soc_dai_set_sysclk(snd_soc_rtd_to_cpu(rtd, 0), FSL_SAI_CLK_MAST1, 0, dir);
  94         if (ret) {
  95                 dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
  96                 return ret;
  97         }
  98
  99         /*
 100          * Per datasheet, AUDMIX expects 8 slots and 32 bits
 101          * for every slot in TDM mode.
 102          */
 103         ret = snd_soc_dai_set_tdm_slot(snd_soc_rtd_to_cpu(rtd, 0), BIT(channels) - 1,
 104                                        BIT(channels) - 1, 8, 32);
 105         if (ret)
 106                 dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
 107
 108         return ret;
 109 }
 110
 111 static int imx_audmix_be_hw_params(struct snd_pcm_substream *substream,
 112                                    struct snd_pcm_hw_params *params)
 113 {
 114         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 115         struct device *dev = rtd->card->dev;
 116         bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 117         unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
 118         int ret;
 119
 120         if (!tx)
 121                 return 0;
 122
 123         /* For playback the AUDMIX is consumer */
 124         fmt |= SND_SOC_DAIFMT_BC_FC;
 125
 126         /* set AUDMIX DAI configuration */
 127         ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt);
 128         if (ret)
 129                 dev_err(dev, "failed to set AUDMIX DAI fmt: %d\n", ret);
 130
 131         return ret;
 132 }
 133
 134 static const struct snd_soc_ops imx_audmix_fe_ops = {
 135         .startup = imx_audmix_fe_startup,
 136         .hw_params = imx_audmix_fe_hw_params,
 137 };
 138
 139 static const struct snd_soc_ops imx_audmix_be_ops = {
 140         .hw_params = imx_audmix_be_hw_params,
 141 };
 142
 143 static int imx_audmix_probe(struct platform_device *pdev)
 144 {
 145         struct device_node *np = pdev->dev.of_node;
 146         struct device_node *audmix_np = NULL, *out_cpu_np = NULL;
 147         struct platform_device *audmix_pdev = NULL;
 148         struct platform_device *cpu_pdev;
 149         struct of_phandle_args args;
 150         struct imx_audmix *priv;
 151         int i, num_dai, ret;
 152         const char *fe_name_pref = "HiFi-AUDMIX-FE-";
 153         char *be_name, *be_pb, *be_cp, *dai_name, *capture_dai_name;
 154
 155         if (pdev->dev.parent) {
 156                 audmix_np = pdev->dev.parent->of_node;
 157         } else {
 158                 dev_err(&pdev->dev, "Missing parent device.\n");
 159                 return -EINVAL;
 160         }
 161
 162         if (!audmix_np) {
 163                 dev_err(&pdev->dev, "Missing DT node for parent device.\n");
 164                 return -EINVAL;
 165         }
 166
 167         audmix_pdev = of_find_device_by_node(audmix_np);
 168         if (!audmix_pdev) {
 169                 dev_err(&pdev->dev, "Missing AUDMIX platform device for %s\n",
 170                         np->full_name);
 171                 return -EINVAL;
 172         }
 173         put_device(&audmix_pdev->dev);
 174
 175         num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL);
 176         if (num_dai != FSL_AUDMIX_MAX_DAIS) {
 177                 dev_err(&pdev->dev, "Need 2 dais to be provided for %s\n",
 178                         audmix_np->full_name);
 179                 return -EINVAL;
 180         }
 181
 182         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 183         if (!priv)
 184                 return -ENOMEM;
 185
 186         priv->num_dai = 2 * num_dai;
 187         priv->dai = devm_kcalloc(&pdev->dev, priv->num_dai,
 188                                  sizeof(struct snd_soc_dai_link), GFP_KERNEL);
 189         if (!priv->dai)
 190                 return -ENOMEM;
 191
 192         priv->num_dai_conf = num_dai;
 193         priv->dai_conf = devm_kcalloc(&pdev->dev, priv->num_dai_conf,
 194                                       sizeof(struct snd_soc_codec_conf),
 195                                       GFP_KERNEL);
 196         if (!priv->dai_conf)
 197                 return -ENOMEM;
 198
 199         priv->num_dapm_routes = 3 * num_dai;
 200         priv->dapm_routes = devm_kcalloc(&pdev->dev, priv->num_dapm_routes,
 201                                          sizeof(struct snd_soc_dapm_route),
 202                                          GFP_KERNEL);
 203         if (!priv->dapm_routes)
 204                 return -ENOMEM;
 205
 206         for (i = 0; i < num_dai; i++) {
 207                 struct snd_soc_dai_link_component *dlc;
 208
 209                 /* for CPU x 2 */
 210                 dlc = devm_kcalloc(&pdev->dev, 2, sizeof(*dlc), GFP_KERNEL);
 211                 if (!dlc)
 212                         return -ENOMEM;
 213
 214                 ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i,
 215                                                  &args);
 216                 if (ret < 0) {
 217                         dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n");
 218                         return ret;
 219                 }
 220
 221                 cpu_pdev = of_find_device_by_node(args.np);
 222                 if (!cpu_pdev) {
 223                         dev_err(&pdev->dev, "failed to find SAI platform device\n");
 224                         return -EINVAL;
 225                 }
 226                 put_device(&cpu_pdev->dev);
 227
 228                 dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s",
 229                                           fe_name_pref, args.np->full_name + 1);
 230                 if (!dai_name)
 231                         return -ENOMEM;
 232
 233                 dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name);
 234
 235                 if (i == 0) {
 236                         out_cpu_np = args.np;
 237                         capture_dai_name =
 238                                 devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
 239                                                dai_name, "CPU-Capture");
 240                         if (!capture_dai_name)
 241                                 return -ENOMEM;
 242                 }
 243
 244                 /*
 245                  * CPU == Platform
 246                  * platform is using soc-generic-dmaengine-pcm
 247                  */
 248                 priv->dai[i].cpus       =
 249                 priv->dai[i].platforms  = &dlc[0];
 250                 priv->dai[i].codecs     = &snd_soc_dummy_dlc;
 251
 252                 priv->dai[i].num_cpus = 1;
 253                 priv->dai[i].num_codecs = 1;
 254                 priv->dai[i].num_platforms = 1;
 255
 256                 priv->dai[i].name = dai_name;
 257                 priv->dai[i].stream_name = "HiFi-AUDMIX-FE";
 258                 priv->dai[i].cpus->of_node = args.np;
 259                 priv->dai[i].cpus->dai_name = dev_name(&cpu_pdev->dev);
 260                 priv->dai[i].dynamic = 1;
 261                 priv->dai[i].dpcm_playback = 1;
 262                 priv->dai[i].dpcm_capture = (i == 0 ? 1 : 0);
 263                 priv->dai[i].ignore_pmdown_time = 1;
 264                 priv->dai[i].ops = &imx_audmix_fe_ops;
 265
 266                 /* Add AUDMIX Backend */
 267                 be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
 268                                          "audmix-%d", i);
 269                 be_pb = devm_kasprintf(&pdev->dev, GFP_KERNEL,
 270                                        "AUDMIX-Playback-%d", i);
 271                 be_cp = devm_kasprintf(&pdev->dev, GFP_KERNEL,
 272                                        "AUDMIX-Capture-%d", i);
 273                 if (!be_name || !be_pb || !be_cp)
 274                         return -ENOMEM;
 275
 276                 priv->dai[num_dai + i].cpus     = &dlc[1];
 277                 priv->dai[num_dai + i].codecs   = &snd_soc_dummy_dlc;
 278
 279                 priv->dai[num_dai + i].num_cpus = 1;
 280                 priv->dai[num_dai + i].num_codecs = 1;
 281
 282                 priv->dai[num_dai + i].name = be_name;
 283                 priv->dai[num_dai + i].cpus->of_node = audmix_np;
 284                 priv->dai[num_dai + i].cpus->dai_name = be_name;
 285                 priv->dai[num_dai + i].no_pcm = 1;
 286                 priv->dai[num_dai + i].dpcm_playback = 1;
 287                 priv->dai[num_dai + i].dpcm_capture  = 1;
 288                 priv->dai[num_dai + i].ignore_pmdown_time = 1;
 289                 priv->dai[num_dai + i].ops = &imx_audmix_be_ops;
 290
 291                 priv->dai_conf[i].dlc.of_node = args.np;
 292                 priv->dai_conf[i].name_prefix = dai_name;
 293
 294                 priv->dapm_routes[i].source =
 295                         devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
 296                                        dai_name, "CPU-Playback");
 297                 if (!priv->dapm_routes[i].source)
 298                         return -ENOMEM;
 299
 300                 priv->dapm_routes[i].sink = be_pb;
 301                 priv->dapm_routes[num_dai + i].source   = be_pb;
 302                 priv->dapm_routes[num_dai + i].sink     = be_cp;
 303                 priv->dapm_routes[2 * num_dai + i].source = be_cp;
 304                 priv->dapm_routes[2 * num_dai + i].sink   = capture_dai_name;
 305         }
 306
 307         cpu_pdev = of_find_device_by_node(out_cpu_np);
 308         if (!cpu_pdev) {
 309                 dev_err(&pdev->dev, "failed to find SAI platform device\n");
 310                 return -EINVAL;
 311         }
 312         put_device(&cpu_pdev->dev);
 313
 314         priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1");
 315         if (IS_ERR(priv->cpu_mclk)) {
 316                 ret = PTR_ERR(priv->cpu_mclk);
 317                 dev_err(&cpu_pdev->dev, "failed to get DAI mclk1: %d\n", ret);
 318                 return ret;
 319         }
 320
 321         priv->audmix_pdev = audmix_pdev;
 322         priv->out_pdev  = cpu_pdev;
 323
 324         priv->card.dai_link = priv->dai;
 325         priv->card.num_links = priv->num_dai;
 326         priv->card.codec_conf = priv->dai_conf;
 327         priv->card.num_configs = priv->num_dai_conf;
 328         priv->card.dapm_routes = priv->dapm_routes;
 329         priv->card.num_dapm_routes = priv->num_dapm_routes;
 330         priv->card.dev = &pdev->dev;
 331         priv->card.owner = THIS_MODULE;
 332         priv->card.name = "imx-audmix";
 333
 334         platform_set_drvdata(pdev, &priv->card);
 335         snd_soc_card_set_drvdata(&priv->card, priv);
 336
 337         ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
 338         if (ret) {
 339                 dev_err(&pdev->dev, "snd_soc_register_card failed\n");
 340                 return ret;
 341         }
 342
 343         return ret;
 344 }
 345
 346 static struct platform_driver imx_audmix_driver = {
 347         .probe = imx_audmix_probe,
 348         .driver = {
 349                 .name = "imx-audmix",
 350                 .pm = &snd_soc_pm_ops,
 351         },
 352 };
 353 module_platform_driver(imx_audmix_driver);
 354
 355 MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver");
 356 MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
 357 MODULE_ALIAS("platform:imx-audmix");
 358 MODULE_LICENSE("GPL v2");