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

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