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