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