sound/soc/codecs/lochnagar-sc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Lochnagar sound card driver
   4 //
   5 // Copyright (c) 2017-2019 Cirrus Logic, Inc. and
   6 //                         Cirrus Logic International Semiconductor Ltd.
   7 //
   8 // Author: Charles Keepax <ckeepax@opensource.cirrus.com>
   9 //         Piotr Stankiewicz <piotrs@opensource.cirrus.com>
  10
  11 #include <linux/clk.h>
  12 #include <linux/module.h>
  13 #include <sound/soc.h>
  14
  15 #include <linux/mfd/lochnagar.h>
  16 #include <linux/mfd/lochnagar1_regs.h>
  17 #include <linux/mfd/lochnagar2_regs.h>
  18
  19 struct lochnagar_sc_priv {
  20         struct clk *mclk;
  21 };
  22
  23 static const struct snd_soc_dapm_widget lochnagar_sc_widgets[] = {
  24         SND_SOC_DAPM_LINE("Line Jack", NULL),
  25         SND_SOC_DAPM_LINE("USB Audio", NULL),
  26 };
  27
  28 static const struct snd_soc_dapm_route lochnagar_sc_routes[] = {
  29         { "Line Jack", NULL, "AIF1 Playback" },
  30         { "AIF1 Capture", NULL, "Line Jack" },
  31
  32         { "USB Audio", NULL, "USB1 Playback" },
  33         { "USB Audio", NULL, "USB2 Playback" },
  34         { "USB1 Capture", NULL, "USB Audio" },
  35         { "USB2 Capture", NULL, "USB Audio" },
  36 };
  37
  38 static const unsigned int lochnagar_sc_chan_vals[] = {
  39         4, 8,
  40 };
  41
  42 static const struct snd_pcm_hw_constraint_list lochnagar_sc_chan_constraint = {
  43         .count = ARRAY_SIZE(lochnagar_sc_chan_vals),
  44         .list = lochnagar_sc_chan_vals,
  45 };
  46
  47 static const unsigned int lochnagar_sc_rate_vals[] = {
  48         8000, 16000, 24000, 32000, 48000, 96000, 192000,
  49         22050, 44100, 88200, 176400,
  50 };
  51
  52 static const struct snd_pcm_hw_constraint_list lochnagar_sc_rate_constraint = {
  53         .count = ARRAY_SIZE(lochnagar_sc_rate_vals),
  54         .list = lochnagar_sc_rate_vals,
  55 };
  56
  57 static int lochnagar_sc_hw_rule_rate(struct snd_pcm_hw_params *params,
  58                                      struct snd_pcm_hw_rule *rule)
  59 {
  60         struct snd_interval range = {
  61                 .min = 8000,
  62                 .max = 24576000 / hw_param_interval(params, rule->deps[0])->max,
  63         };
  64
  65         return snd_interval_refine(hw_param_interval(params, rule->var),
  66                                    &range);
  67 }
  68
  69 static int lochnagar_sc_startup(struct snd_pcm_substream *substream,
  70                                 struct snd_soc_dai *dai)
  71 {
  72         struct snd_soc_component *comp = dai->component;
  73         struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
  74         int ret;
  75
  76         ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
  77                                          SNDRV_PCM_HW_PARAM_RATE,
  78                                          &lochnagar_sc_rate_constraint);
  79         if (ret)
  80                 return ret;
  81
  82         return snd_pcm_hw_rule_add(substream->runtime, 0,
  83                                    SNDRV_PCM_HW_PARAM_RATE,
  84                                    lochnagar_sc_hw_rule_rate, priv,
  85                                    SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
  86 }
  87
  88 static int lochnagar_sc_line_startup(struct snd_pcm_substream *substream,
  89                                      struct snd_soc_dai *dai)
  90 {
  91         struct snd_soc_component *comp = dai->component;
  92         struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
  93         int ret;
  94
  95         ret = clk_prepare_enable(priv->mclk);
  96         if (ret < 0) {
  97                 dev_err(dai->dev, "Failed to enable MCLK: %d\n", ret);
  98                 return ret;
  99         }
 100
 101         ret = lochnagar_sc_startup(substream, dai);
 102         if (ret)
 103                 return ret;
 104
 105         return snd_pcm_hw_constraint_list(substream->runtime, 0,
 106                                           SNDRV_PCM_HW_PARAM_CHANNELS,
 107                                           &lochnagar_sc_chan_constraint);
 108 }
 109
 110 static void lochnagar_sc_line_shutdown(struct snd_pcm_substream *substream,
 111                                        struct snd_soc_dai *dai)
 112 {
 113         struct snd_soc_component *comp = dai->component;
 114         struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
 115
 116         clk_disable_unprepare(priv->mclk);
 117 }
 118
 119 static int lochnagar_sc_check_fmt(struct snd_soc_dai *dai, unsigned int fmt,
 120                                   unsigned int tar)
 121 {
 122         tar |= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
 123
 124         if ((fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) != tar)
 125                 return -EINVAL;
 126
 127         return 0;
 128 }
 129
 130 static int lochnagar_sc_set_line_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 131 {
 132         return lochnagar_sc_check_fmt(dai, fmt, SND_SOC_DAIFMT_CBS_CFS);
 133 }
 134
 135 static int lochnagar_sc_set_usb_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 136 {
 137         return lochnagar_sc_check_fmt(dai, fmt, SND_SOC_DAIFMT_CBM_CFM);
 138 }
 139
 140 static const struct snd_soc_dai_ops lochnagar_sc_line_ops = {
 141         .startup = lochnagar_sc_line_startup,
 142         .shutdown = lochnagar_sc_line_shutdown,
 143         .set_fmt = lochnagar_sc_set_line_fmt,
 144 };
 145
 146 static const struct snd_soc_dai_ops lochnagar_sc_usb_ops = {
 147         .startup = lochnagar_sc_startup,
 148         .set_fmt = lochnagar_sc_set_usb_fmt,
 149 };
 150
 151 static struct snd_soc_dai_driver lochnagar_sc_dai[] = {
 152         {
 153                 .name = "lochnagar-line",
 154                 .playback = {
 155                         .stream_name = "AIF1 Playback",
 156                         .channels_min = 4,
 157                         .channels_max = 8,
 158                         .rates = SNDRV_PCM_RATE_KNOT,
 159                         .formats = SNDRV_PCM_FMTBIT_S32_LE,
 160                 },
 161                 .capture = {
 162                         .stream_name = "AIF1 Capture",
 163                         .channels_min = 4,
 164                         .channels_max = 8,
 165                         .rates = SNDRV_PCM_RATE_KNOT,
 166                         .formats = SNDRV_PCM_FMTBIT_S32_LE,
 167                 },
 168                 .ops = &lochnagar_sc_line_ops,
 169                 .symmetric_rates = true,
 170                 .symmetric_samplebits = true,
 171         },
 172         {
 173                 .name = "lochnagar-usb1",
 174                 .playback = {
 175                         .stream_name = "USB1 Playback",
 176                         .channels_min = 1,
 177                         .channels_max = 8,
 178                         .rates = SNDRV_PCM_RATE_KNOT,
 179                         .formats = SNDRV_PCM_FMTBIT_S32_LE,
 180                 },
 181                 .capture = {
 182                         .stream_name = "USB1 Capture",
 183                         .channels_min = 1,
 184                         .channels_max = 8,
 185                         .rates = SNDRV_PCM_RATE_KNOT,
 186                         .formats = SNDRV_PCM_FMTBIT_S32_LE,
 187                 },
 188                 .ops = &lochnagar_sc_usb_ops,
 189                 .symmetric_rates = true,
 190                 .symmetric_samplebits = true,
 191         },
 192         {
 193                 .name = "lochnagar-usb2",
 194                 .playback = {
 195                         .stream_name = "USB2 Playback",
 196                         .channels_min = 1,
 197                         .channels_max = 8,
 198                         .rates = SNDRV_PCM_RATE_KNOT,
 199                         .formats = SNDRV_PCM_FMTBIT_S32_LE,
 200                 },
 201                 .capture = {
 202                         .stream_name = "USB2 Capture",
 203                         .channels_min = 1,
 204                         .channels_max = 8,
 205                         .rates = SNDRV_PCM_RATE_KNOT,
 206                         .formats = SNDRV_PCM_FMTBIT_S32_LE,
 207                 },
 208                 .ops = &lochnagar_sc_usb_ops,
 209                 .symmetric_rates = true,
 210                 .symmetric_samplebits = true,
 211         },
 212 };
 213
 214 static const struct snd_soc_component_driver lochnagar_sc_driver = {
 215         .non_legacy_dai_naming = 1,
 216
 217         .dapm_widgets = lochnagar_sc_widgets,
 218         .num_dapm_widgets = ARRAY_SIZE(lochnagar_sc_widgets),
 219         .dapm_routes = lochnagar_sc_routes,
 220         .num_dapm_routes = ARRAY_SIZE(lochnagar_sc_routes),
 221 };
 222
 223 static int lochnagar_sc_probe(struct platform_device *pdev)
 224 {
 225         struct lochnagar_sc_priv *priv;
 226         int ret;
 227
 228         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 229         if (!priv)
 230                 return -ENOMEM;
 231
 232         priv->mclk = devm_clk_get(&pdev->dev, "mclk");
 233         if (IS_ERR(priv->mclk)) {
 234                 ret = PTR_ERR(priv->mclk);
 235                 dev_err(&pdev->dev, "Failed to get MCLK: %d\n", ret);
 236                 return ret;
 237         }
 238
 239         platform_set_drvdata(pdev, priv);
 240
 241         return devm_snd_soc_register_component(&pdev->dev,
 242                                                &lochnagar_sc_driver,
 243                                                lochnagar_sc_dai,
 244                                                ARRAY_SIZE(lochnagar_sc_dai));
 245 }
 246
 247 static const struct of_device_id lochnagar_of_match[] = {
 248         { .compatible = "cirrus,lochnagar2-soundcard" },
 249         {}
 250 };
 251 MODULE_DEVICE_TABLE(of, lochnagar_of_match);
 252
 253 static struct platform_driver lochnagar_sc_codec_driver = {
 254         .driver = {
 255                 .name = "lochnagar-soundcard",
 256                 .of_match_table = of_match_ptr(lochnagar_of_match),
 257         },
 258
 259         .probe = lochnagar_sc_probe,
 260 };
 261 module_platform_driver(lochnagar_sc_codec_driver);
 262
 263 MODULE_DESCRIPTION("ASoC Lochnagar Sound Card Driver");
 264 MODULE_AUTHOR("Piotr Stankiewicz <piotrs@opensource.cirrus.com>");
 265 MODULE_LICENSE("GPL v2");
 266 MODULE_ALIAS("platform:lochnagar-soundcard");