sound/soc/generic/simple-scu-card.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // ASoC simple SCU sound card support
   4 //
   5 // Copyright (C) 2015 Renesas Solutions Corp.
   6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   7 //
   8 // based on ${LINUX}/sound/soc/generic/simple-card.c
   9
  10 #include <linux/clk.h>
  11 #include <linux/device.h>
  12 #include <linux/module.h>
  13 #include <linux/of.h>
  14 #include <linux/of_device.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/string.h>
  17 #include <sound/jack.h>
  18 #include <sound/soc.h>
  19 #include <sound/soc-dai.h>
  20 #include <sound/simple_card_utils.h>
  21
  22 struct simple_card_data {
  23         struct snd_soc_card snd_card;
  24         struct snd_soc_codec_conf codec_conf;
  25         struct simple_dai_props {
  26                 struct asoc_simple_dai dai;
  27                 struct snd_soc_dai_link_component codecs;
  28                 struct snd_soc_dai_link_component platform;
  29         } *dai_props;
  30         struct snd_soc_dai_link *dai_link;
  31         struct asoc_simple_card_data adata;
  32 };
  33
  34 #define simple_priv_to_card(priv) (&(priv)->snd_card)
  35 #define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
  36 #define simple_priv_to_dev(priv) (simple_priv_to_card(priv)->dev)
  37 #define simple_priv_to_link(priv, i) (simple_priv_to_card(priv)->dai_link + (i))
  38
  39 #define DAI     "sound-dai"
  40 #define CELL    "#sound-dai-cells"
  41 #define PREFIX  "simple-audio-card,"
  42
  43 static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
  44 {
  45         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  46         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
  47         struct simple_dai_props *dai_props =
  48                 simple_priv_to_props(priv, rtd->num);
  49
  50         return asoc_simple_card_clk_enable(&dai_props->dai);
  51 }
  52
  53 static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
  54 {
  55         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  56         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
  57         struct simple_dai_props *dai_props =
  58                 simple_priv_to_props(priv, rtd->num);
  59
  60         asoc_simple_card_clk_disable(&dai_props->dai);
  61 }
  62
  63 static const struct snd_soc_ops asoc_simple_card_ops = {
  64         .startup = asoc_simple_card_startup,
  65         .shutdown = asoc_simple_card_shutdown,
  66 };
  67
  68 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
  69 {
  70         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
  71         struct snd_soc_dai *dai;
  72         struct snd_soc_dai_link *dai_link;
  73         struct simple_dai_props *dai_props;
  74         int num = rtd->num;
  75
  76         dai_link        = simple_priv_to_link(priv, num);
  77         dai_props       = simple_priv_to_props(priv, num);
  78         dai             = dai_link->dynamic ?
  79                                 rtd->cpu_dai :
  80                                 rtd->codec_dai;
  81
  82         return asoc_simple_card_init_dai(dai, &dai_props->dai);
  83 }
  84
  85 static int asoc_simple_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
  86                                         struct snd_pcm_hw_params *params)
  87 {
  88         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
  89
  90         asoc_simple_card_convert_fixup(&priv->adata, params);
  91
  92         return 0;
  93 }
  94
  95 static int asoc_simple_card_dai_link_of(struct device_node *np,
  96                                         struct simple_card_data *priv,
  97                                         unsigned int daifmt,
  98                                         int idx, bool is_fe)
  99 {
 100         struct device *dev = simple_priv_to_dev(priv);
 101         struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
 102         struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
 103         struct snd_soc_card *card = simple_priv_to_card(priv);
 104         int ret;
 105
 106         if (is_fe) {
 107                 int is_single_links = 0;
 108                 struct snd_soc_dai_link_component *codecs;
 109
 110                 /* BE is dummy */
 111                 codecs                  = dai_link->codecs;
 112                 codecs->of_node         = NULL;
 113                 codecs->dai_name        = "snd-soc-dummy-dai";
 114                 codecs->name            = "snd-soc-dummy";
 115
 116                 /* FE settings */
 117                 dai_link->dynamic               = 1;
 118                 dai_link->dpcm_merged_format    = 1;
 119
 120                 ret = asoc_simple_card_parse_cpu(np, dai_link, DAI, CELL,
 121                                                  &is_single_links);
 122                 if (ret)
 123                         return ret;
 124
 125                 ret = asoc_simple_card_parse_clk_cpu(dev, np, dai_link, &dai_props->dai);
 126                 if (ret < 0)
 127                         return ret;
 128
 129                 ret = asoc_simple_card_set_dailink_name(dev, dai_link,
 130                                                         "fe.%s",
 131                                                         dai_link->cpu_dai_name);
 132                 if (ret < 0)
 133                         return ret;
 134
 135                 asoc_simple_card_canonicalize_cpu(dai_link, is_single_links);
 136         } else {
 137                 /* FE is dummy */
 138                 dai_link->cpu_of_node           = NULL;
 139                 dai_link->cpu_dai_name          = "snd-soc-dummy-dai";
 140                 dai_link->cpu_name              = "snd-soc-dummy";
 141
 142                 /* BE settings */
 143                 dai_link->no_pcm                = 1;
 144                 dai_link->be_hw_params_fixup    = asoc_simple_card_be_hw_params_fixup;
 145
 146                 ret = asoc_simple_card_parse_codec(np, dai_link, DAI, CELL);
 147                 if (ret < 0)
 148                         return ret;
 149
 150                 ret = asoc_simple_card_parse_clk_codec(dev, np, dai_link, &dai_props->dai);
 151                 if (ret < 0)
 152                         return ret;
 153
 154                 ret = asoc_simple_card_set_dailink_name(dev, dai_link,
 155                                                         "be.%s",
 156                                                         dai_link->codecs->dai_name);
 157                 if (ret < 0)
 158                         return ret;
 159
 160                 snd_soc_of_parse_audio_prefix(card,
 161                                               &priv->codec_conf,
 162                                               dai_link->codecs->of_node,
 163                                               PREFIX "prefix");
 164         }
 165
 166         ret = asoc_simple_card_of_parse_tdm(np, &dai_props->dai);
 167         if (ret)
 168                 return ret;
 169
 170         ret = asoc_simple_card_canonicalize_dailink(dai_link);
 171         if (ret < 0)
 172                 return ret;
 173
 174         dai_link->dai_fmt               = daifmt;
 175         dai_link->dpcm_playback         = 1;
 176         dai_link->dpcm_capture          = 1;
 177         dai_link->ops                   = &asoc_simple_card_ops;
 178         dai_link->init                  = asoc_simple_card_dai_init;
 179
 180         return 0;
 181 }
 182
 183 static int asoc_simple_card_parse_of(struct simple_card_data *priv)
 184
 185 {
 186         struct device *dev = simple_priv_to_dev(priv);
 187         struct device_node *np;
 188         struct snd_soc_card *card = simple_priv_to_card(priv);
 189         struct device_node *node = dev->of_node;
 190         unsigned int daifmt = 0;
 191         bool is_fe;
 192         int ret, i;
 193
 194         if (!node)
 195                 return -EINVAL;
 196
 197         ret = asoc_simple_card_of_parse_widgets(card, PREFIX);
 198         if (ret < 0)
 199                 return ret;
 200
 201         ret = asoc_simple_card_of_parse_routing(card, PREFIX, 0);
 202         if (ret < 0)
 203                 return ret;
 204
 205         asoc_simple_card_parse_convert(dev, PREFIX, &priv->adata);
 206
 207         /* find 1st codec */
 208         np = of_get_child_by_name(node, PREFIX "codec");
 209         if (!np)
 210                 return -ENODEV;
 211
 212         ret = asoc_simple_card_parse_daifmt(dev, node, np, PREFIX, &daifmt);
 213         if (ret < 0)
 214                 return ret;
 215
 216         i = 0;
 217         for_each_child_of_node(node, np) {
 218                 is_fe = false;
 219                 if (strcmp(np->name, PREFIX "cpu") == 0)
 220                         is_fe = true;
 221
 222                 ret = asoc_simple_card_dai_link_of(np, priv, daifmt, i, is_fe);
 223                 if (ret < 0)
 224                         return ret;
 225                 i++;
 226         }
 227
 228         ret = asoc_simple_card_parse_card_name(card, PREFIX);
 229         if (ret < 0)
 230                 return ret;
 231
 232         return 0;
 233 }
 234
 235 static int asoc_simple_card_probe(struct platform_device *pdev)
 236 {
 237         struct simple_card_data *priv;
 238         struct snd_soc_dai_link *dai_link;
 239         struct simple_dai_props *dai_props;
 240         struct snd_soc_card *card;
 241         struct device *dev = &pdev->dev;
 242         struct device_node *np = dev->of_node;
 243         int num, ret, i;
 244
 245         /* Allocate the private data */
 246         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 247         if (!priv)
 248                 return -ENOMEM;
 249
 250         num = of_get_child_count(np);
 251
 252         dai_props = devm_kcalloc(dev, num, sizeof(*dai_props), GFP_KERNEL);
 253         dai_link  = devm_kcalloc(dev, num, sizeof(*dai_link), GFP_KERNEL);
 254         if (!dai_props || !dai_link)
 255                 return -ENOMEM;
 256
 257         /*
 258          * Use snd_soc_dai_link_component instead of legacy style
 259          * It is codec only. but cpu/platform will be supported in the future.
 260          * see
 261          *      soc-core.c :: snd_soc_init_multicodec()
 262          */
 263         for (i = 0; i < num; i++) {
 264                 dai_link[i].codecs      = &dai_props[i].codecs;
 265                 dai_link[i].num_codecs  = 1;
 266                 dai_link[i].platform    = &dai_props[i].platform;
 267         }
 268
 269         priv->dai_props                         = dai_props;
 270         priv->dai_link                          = dai_link;
 271
 272         /* Init snd_soc_card */
 273         card = simple_priv_to_card(priv);
 274         card->owner             = THIS_MODULE;
 275         card->dev               = dev;
 276         card->dai_link          = priv->dai_link;
 277         card->num_links         = num;
 278         card->codec_conf        = &priv->codec_conf;
 279         card->num_configs       = 1;
 280
 281         ret = asoc_simple_card_parse_of(priv);
 282         if (ret < 0) {
 283                 if (ret != -EPROBE_DEFER)
 284                         dev_err(dev, "parse error %d\n", ret);
 285                 goto err;
 286         }
 287
 288         snd_soc_card_set_drvdata(card, priv);
 289
 290         ret = devm_snd_soc_register_card(dev, card);
 291         if (ret < 0)
 292                 goto err;
 293
 294         return 0;
 295 err:
 296         asoc_simple_card_clean_reference(card);
 297
 298         return ret;
 299 }
 300
 301 static int asoc_simple_card_remove(struct platform_device *pdev)
 302 {
 303         struct snd_soc_card *card = platform_get_drvdata(pdev);
 304
 305         return asoc_simple_card_clean_reference(card);
 306 }
 307
 308 static const struct of_device_id asoc_simple_of_match[] = {
 309         { .compatible = "renesas,rsrc-card", },
 310         { .compatible = "simple-scu-audio-card", },
 311         {},
 312 };
 313 MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
 314
 315 static struct platform_driver asoc_simple_card = {
 316         .driver = {
 317                 .name = "simple-scu-audio-card",
 318                 .pm = &snd_soc_pm_ops,
 319                 .of_match_table = asoc_simple_of_match,
 320         },
 321         .probe = asoc_simple_card_probe,
 322         .remove = asoc_simple_card_remove,
 323 };
 324
 325 module_platform_driver(asoc_simple_card);
 326
 327 MODULE_ALIAS("platform:asoc-simple-scu-card");
 328 MODULE_LICENSE("GPL v2");
 329 MODULE_DESCRIPTION("ASoC Simple SCU Sound Card");
 330 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");