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 static const struct of_device_id asoc_simple_card_of_match[] = {
  26         { .compatible = "renesas,rsrc-card", },
  27         { .compatible = "simple-scu-audio-card", },
  28         {},
  29 };
  30 MODULE_DEVICE_TABLE(of, asoc_simple_card_of_match);
  31
  32 struct asoc_simple_card_priv {
  33         struct snd_soc_card snd_card;
  34         struct snd_soc_codec_conf codec_conf;
  35         struct asoc_simple_dai *dai_props;
  36         struct snd_soc_dai_link *dai_link;
  37         u32 convert_rate;
  38         u32 convert_channels;
  39 };
  40
  41 #define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
  42 #define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i))
  43 #define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
  44
  45 #define DAI     "sound-dai"
  46 #define CELL    "#sound-dai-cells"
  47 #define PREFIX  "simple-audio-card,"
  48
  49 static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
  50 {
  51         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  52         struct asoc_simple_card_priv *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         return clk_prepare_enable(dai_props->clk);
  57 }
  58
  59 static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
  60 {
  61         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  62         struct asoc_simple_card_priv *priv =    snd_soc_card_get_drvdata(rtd->card);
  63         struct asoc_simple_dai *dai_props =
  64                 simple_priv_to_props(priv, rtd->num);
  65
  66         clk_disable_unprepare(dai_props->clk);
  67 }
  68
  69 static struct snd_soc_ops asoc_simple_card_ops = {
  70         .startup = asoc_simple_card_startup,
  71         .shutdown = asoc_simple_card_shutdown,
  72 };
  73
  74 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
  75 {
  76         struct asoc_simple_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
  77         struct snd_soc_dai *dai;
  78         struct snd_soc_dai_link *dai_link;
  79         struct asoc_simple_dai *dai_props;
  80         int num = rtd->num;
  81
  82         dai_link        = simple_priv_to_link(priv, num);
  83         dai_props       = simple_priv_to_props(priv, num);
  84         dai             = dai_link->dynamic ?
  85                                 rtd->cpu_dai :
  86                                 rtd->codec_dai;
  87
  88         return asoc_simple_card_init_dai(dai, dai_props);
  89 }
  90
  91 static int asoc_simple_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
  92                                         struct snd_pcm_hw_params *params)
  93 {
  94         struct asoc_simple_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
  95         struct snd_interval *rate = hw_param_interval(params,
  96                                                       SNDRV_PCM_HW_PARAM_RATE);
  97         struct snd_interval *channels = hw_param_interval(params,
  98                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
  99
 100         if (priv->convert_rate)
 101                 rate->min =
 102                 rate->max = priv->convert_rate;
 103
 104         if (priv->convert_channels)
 105                 channels->min =
 106                 channels->max = priv->convert_channels;
 107
 108         return 0;
 109 }
 110
 111 static int asoc_simple_card_parse_links(struct device_node *np,
 112                                         struct asoc_simple_card_priv *priv,
 113                                         unsigned int daifmt,
 114                                         int idx, bool is_fe)
 115 {
 116         struct device *dev = simple_priv_to_dev(priv);
 117         struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
 118         struct asoc_simple_dai *dai_props = simple_priv_to_props(priv, idx);
 119         int ret;
 120
 121         /* Parse TDM slot */
 122         ret = snd_soc_of_parse_tdm_slot(np,
 123                                         &dai_props->tx_slot_mask,
 124                                         &dai_props->rx_slot_mask,
 125                                         &dai_props->slots,
 126                                         &dai_props->slot_width);
 127         if (ret)
 128                 return ret;
 129
 130         if (is_fe) {
 131                 int is_single_links = 0;
 132
 133                 /* BE is dummy */
 134                 dai_link->codec_of_node         = NULL;
 135                 dai_link->codec_dai_name        = "snd-soc-dummy-dai";
 136                 dai_link->codec_name            = "snd-soc-dummy";
 137
 138                 /* FE settings */
 139                 dai_link->dynamic               = 1;
 140                 dai_link->dpcm_merged_format    = 1;
 141
 142                 ret = asoc_simple_card_parse_cpu(np, dai_link, DAI, CELL,
 143                                                  &is_single_links);
 144                 if (ret)
 145                         return ret;
 146
 147                 ret = asoc_simple_card_parse_clk_cpu(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                                                         "fe.%s",
 153                                                         dai_link->cpu_dai_name);
 154                 if (ret < 0)
 155                         return ret;
 156
 157                 asoc_simple_card_canonicalize_cpu(dai_link, is_single_links);
 158         } else {
 159                 /* FE is dummy */
 160                 dai_link->cpu_of_node           = NULL;
 161                 dai_link->cpu_dai_name          = "snd-soc-dummy-dai";
 162                 dai_link->cpu_name              = "snd-soc-dummy";
 163
 164                 /* BE settings */
 165                 dai_link->no_pcm                = 1;
 166                 dai_link->be_hw_params_fixup    = asoc_simple_card_be_hw_params_fixup;
 167
 168                 ret = asoc_simple_card_parse_codec(np, dai_link, DAI, CELL);
 169                 if (ret < 0)
 170                         return ret;
 171
 172                 ret = asoc_simple_card_parse_clk_codec(np, dai_link, dai_props);
 173                 if (ret < 0)
 174                         return ret;
 175
 176                 ret = asoc_simple_card_set_dailink_name(dev, dai_link,
 177                                                         "be.%s",
 178                                                         dai_link->codec_dai_name);
 179                 if (ret < 0)
 180                         return ret;
 181
 182                 snd_soc_of_parse_audio_prefix(&priv->snd_card,
 183                                               &priv->codec_conf,
 184                                               dai_link->codec_of_node,
 185                                               PREFIX "prefix");
 186         }
 187
 188         ret = asoc_simple_card_canonicalize_dailink(dai_link);
 189         if (ret < 0)
 190                 return ret;
 191
 192         dai_link->dai_fmt               = daifmt;
 193         dai_link->dpcm_playback         = 1;
 194         dai_link->dpcm_capture          = 1;
 195         dai_link->ops                   = &asoc_simple_card_ops;
 196         dai_link->init                  = asoc_simple_card_dai_init;
 197
 198         dev_dbg(dev, "\t%s / %04x / %d\n",
 199                 dai_link->name,
 200                 dai_link->dai_fmt,
 201                 dai_props->sysclk);
 202
 203         return 0;
 204 }
 205
 206 static int asoc_simple_card_dai_link_of(struct device_node *node,
 207                                  struct asoc_simple_card_priv *priv)
 208 {
 209         struct device *dev = simple_priv_to_dev(priv);
 210         struct device_node *np;
 211         unsigned int daifmt = 0;
 212         int ret, i;
 213         bool is_fe;
 214
 215         /* find 1st codec */
 216         np = of_get_child_by_name(node, PREFIX "codec");
 217         if (!np)
 218                 return -ENODEV;
 219
 220         ret = asoc_simple_card_parse_daifmt(dev, node, np,
 221                                             PREFIX, &daifmt);
 222         if (ret < 0)
 223                 return ret;
 224
 225         i = 0;
 226         for_each_child_of_node(node, np) {
 227                 is_fe = false;
 228                 if (strcmp(np->name, PREFIX "cpu") == 0)
 229                         is_fe = true;
 230
 231                 ret = asoc_simple_card_parse_links(np, priv, daifmt, i, is_fe);
 232                 if (ret < 0)
 233                         return ret;
 234                 i++;
 235         }
 236
 237         return 0;
 238 }
 239
 240 static int asoc_simple_card_parse_of(struct device_node *node,
 241                               struct asoc_simple_card_priv *priv,
 242                               struct device *dev)
 243 {
 244         struct asoc_simple_dai *props;
 245         struct snd_soc_dai_link *links;
 246         int ret;
 247         int num;
 248
 249         if (!node)
 250                 return -EINVAL;
 251
 252         num = of_get_child_count(node);
 253         props = devm_kzalloc(dev, sizeof(*props) * num, GFP_KERNEL);
 254         links = devm_kzalloc(dev, sizeof(*links) * num, GFP_KERNEL);
 255         if (!props || !links)
 256                 return -ENOMEM;
 257
 258         priv->dai_props = props;
 259         priv->dai_link  = links;
 260
 261         /* Init snd_soc_card */
 262         priv->snd_card.owner                    = THIS_MODULE;
 263         priv->snd_card.dev                      = dev;
 264         priv->snd_card.dai_link                 = priv->dai_link;
 265         priv->snd_card.num_links                = num;
 266         priv->snd_card.codec_conf               = &priv->codec_conf;
 267         priv->snd_card.num_configs              = 1;
 268
 269         ret = snd_soc_of_parse_audio_routing(&priv->snd_card, PREFIX "routing");
 270         if (ret < 0)
 271                 return ret;
 272
 273         /* sampling rate convert */
 274         of_property_read_u32(node, PREFIX "convert-rate", &priv->convert_rate);
 275
 276         /* channels transfer */
 277         of_property_read_u32(node, PREFIX "convert-channels", &priv->convert_channels);
 278
 279         ret = asoc_simple_card_dai_link_of(node, priv);
 280         if (ret < 0)
 281                 return ret;
 282
 283         ret = asoc_simple_card_parse_card_name(&priv->snd_card, PREFIX);
 284         if (ret < 0)
 285                 return ret;
 286
 287         dev_dbg(dev, "New card: %s\n",
 288                 priv->snd_card.name ? priv->snd_card.name : "");
 289         dev_dbg(dev, "convert_rate     %d\n", priv->convert_rate);
 290         dev_dbg(dev, "convert_channels %d\n", priv->convert_channels);
 291
 292         return 0;
 293 }
 294
 295 static int asoc_simple_card_probe(struct platform_device *pdev)
 296 {
 297         struct asoc_simple_card_priv *priv;
 298         struct device_node *np = pdev->dev.of_node;
 299         struct device *dev = &pdev->dev;
 300         int ret;
 301
 302         /* Allocate the private data */
 303         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 304         if (!priv)
 305                 return -ENOMEM;
 306
 307         ret = asoc_simple_card_parse_of(np, priv, dev);
 308         if (ret < 0) {
 309                 if (ret != -EPROBE_DEFER)
 310                         dev_err(dev, "parse error %d\n", ret);
 311                 goto err;
 312         }
 313
 314         snd_soc_card_set_drvdata(&priv->snd_card, priv);
 315
 316         ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
 317         if (ret >= 0)
 318                 return ret;
 319 err:
 320         asoc_simple_card_clean_reference(&priv->snd_card);
 321
 322         return ret;
 323 }
 324
 325 static int asoc_simple_card_remove(struct platform_device *pdev)
 326 {
 327         struct snd_soc_card *card = platform_get_drvdata(pdev);
 328
 329         return asoc_simple_card_clean_reference(card);
 330 }
 331
 332 static struct platform_driver asoc_simple_card = {
 333         .driver = {
 334                 .name = "simple-scu-audio-card",
 335                 .of_match_table = asoc_simple_card_of_match,
 336         },
 337         .probe = asoc_simple_card_probe,
 338         .remove = asoc_simple_card_remove,
 339 };
 340
 341 module_platform_driver(asoc_simple_card);
 342
 343 MODULE_ALIAS("platform:asoc-simple-scu-card");
 344 MODULE_LICENSE("GPL v2");
 345 MODULE_DESCRIPTION("ASoC Simple SCU Sound Card");
 346 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");