sound/soc/codecs/uda1334.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 //
   3 // uda1334.c  --  UDA1334 ALSA SoC Audio driver
   4 //
   5 // Based on WM8523 ALSA SoC Audio driver written by Mark Brown
   6
   7 #include <linux/module.h>
   8 #include <linux/moduleparam.h>
   9 #include <linux/init.h>
  10 #include <linux/delay.h>
  11 #include <linux/slab.h>
  12 #include <linux/gpio/consumer.h>
  13 #include <linux/of_device.h>
  14 #include <sound/core.h>
  15 #include <sound/pcm.h>
  16 #include <sound/pcm_params.h>
  17 #include <sound/soc.h>
  18 #include <sound/initval.h>
  19
  20 #define UDA1334_NUM_RATES 6
  21
  22 /* codec private data */
  23 struct uda1334_priv {
  24         struct gpio_desc *mute;
  25         struct gpio_desc *deemph;
  26         unsigned int sysclk;
  27         unsigned int rate_constraint_list[UDA1334_NUM_RATES];
  28         struct snd_pcm_hw_constraint_list rate_constraint;
  29 };
  30
  31 static const struct snd_soc_dapm_widget uda1334_dapm_widgets[] = {
  32 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
  33 SND_SOC_DAPM_OUTPUT("LINEVOUTL"),
  34 SND_SOC_DAPM_OUTPUT("LINEVOUTR"),
  35 };
  36
  37 static const struct snd_soc_dapm_route uda1334_dapm_routes[] = {
  38         { "LINEVOUTL", NULL, "DAC" },
  39         { "LINEVOUTR", NULL, "DAC" },
  40 };
  41
  42 static int uda1334_put_deemph(struct snd_kcontrol *kcontrol,
  43                               struct snd_ctl_elem_value *ucontrol)
  44 {
  45         struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
  46         struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
  47         int deemph = ucontrol->value.integer.value[0];
  48
  49         if (deemph > 1)
  50                 return -EINVAL;
  51
  52         gpiod_set_value_cansleep(uda1334->deemph, deemph);
  53
  54         return 0;
  55 };
  56
  57 static int uda1334_get_deemph(struct snd_kcontrol *kcontrol,
  58                               struct snd_ctl_elem_value *ucontrol)
  59 {
  60         struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
  61         struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
  62         int ret;
  63
  64         ret = gpiod_get_value_cansleep(uda1334->deemph);
  65         if (ret < 0)
  66                 return -EINVAL;
  67
  68         ucontrol->value.integer.value[0] = ret;
  69
  70         return 0;
  71 };
  72
  73 static const struct snd_kcontrol_new uda1334_snd_controls[] = {
  74         SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
  75                             uda1334_get_deemph, uda1334_put_deemph),
  76 };
  77
  78 static const struct {
  79         int value;
  80         int ratio;
  81 } lrclk_ratios[UDA1334_NUM_RATES] = {
  82         { 1, 128 },
  83         { 2, 192 },
  84         { 3, 256 },
  85         { 4, 384 },
  86         { 5, 512 },
  87         { 6, 768 },
  88 };
  89
  90 static int uda1334_startup(struct snd_pcm_substream *substream,
  91                            struct snd_soc_dai *dai)
  92 {
  93         struct snd_soc_component *component = dai->component;
  94         struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
  95
  96         /*
  97          * The set of sample rates that can be supported depends on the
  98          * MCLK supplied to the CODEC - enforce this.
  99          */
 100         if (!uda1334->sysclk) {
 101                 dev_err(component->dev,
 102                         "No MCLK configured, call set_sysclk() on init\n");
 103                 return -EINVAL;
 104         }
 105
 106         snd_pcm_hw_constraint_list(substream->runtime, 0,
 107                                    SNDRV_PCM_HW_PARAM_RATE,
 108                                    &uda1334->rate_constraint);
 109
 110         gpiod_set_value_cansleep(uda1334->mute, 1);
 111
 112         return 0;
 113 }
 114
 115 static void uda1334_shutdown(struct snd_pcm_substream *substream,
 116                              struct snd_soc_dai *dai)
 117 {
 118         struct snd_soc_component *component = dai->component;
 119         struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
 120
 121         gpiod_set_value_cansleep(uda1334->mute, 0);
 122 }
 123
 124 static int uda1334_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 125                                   int clk_id, unsigned int freq, int dir)
 126 {
 127         struct snd_soc_component *component = codec_dai->component;
 128         struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
 129         unsigned int val;
 130         int i, j = 0;
 131
 132         uda1334->sysclk = freq;
 133
 134         uda1334->rate_constraint.count = 0;
 135         for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
 136                 val = freq / lrclk_ratios[i].ratio;
 137                 /*
 138                  * Check that it's a standard rate since core can't
 139                  * cope with others and having the odd rates confuses
 140                  * constraint matching.
 141                  */
 142
 143                 switch (val) {
 144                 case 8000:
 145                 case 32000:
 146                 case 44100:
 147                 case 48000:
 148                 case 64000:
 149                 case 88200:
 150                 case 96000:
 151                         dev_dbg(component->dev, "Supported sample rate: %dHz\n",
 152                                 val);
 153                         uda1334->rate_constraint_list[j++] = val;
 154                         uda1334->rate_constraint.count++;
 155                         break;
 156                 default:
 157                         dev_dbg(component->dev, "Skipping sample rate: %dHz\n",
 158                                 val);
 159                 }
 160         }
 161
 162         /* Need at least one supported rate... */
 163         if (uda1334->rate_constraint.count == 0)
 164                 return -EINVAL;
 165
 166         return 0;
 167 }
 168
 169 static int uda1334_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
 170 {
 171         fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK |
 172                 SND_SOC_DAIFMT_MASTER_MASK);
 173
 174         if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 175                     SND_SOC_DAIFMT_CBS_CFS)) {
 176                 dev_err(codec_dai->dev, "Invalid DAI format\n");
 177                 return -EINVAL;
 178         }
 179
 180         return 0;
 181 }
 182
 183 static int uda1334_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
 184 {
 185         struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(dai->component);
 186
 187         if (uda1334->mute)
 188                 gpiod_set_value_cansleep(uda1334->mute, mute);
 189
 190         return 0;
 191 }
 192
 193 #define UDA1334_RATES SNDRV_PCM_RATE_8000_96000
 194
 195 #define UDA1334_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
 196
 197 static const struct snd_soc_dai_ops uda1334_dai_ops = {
 198         .startup        = uda1334_startup,
 199         .shutdown       = uda1334_shutdown,
 200         .set_sysclk     = uda1334_set_dai_sysclk,
 201         .set_fmt        = uda1334_set_fmt,
 202         .mute_stream    = uda1334_mute_stream,
 203 };
 204
 205 static struct snd_soc_dai_driver uda1334_dai = {
 206         .name = "uda1334-hifi",
 207         .playback = {
 208                 .stream_name = "Playback",
 209                 .channels_min = 2,
 210                 .channels_max = 2,
 211                 .rates = UDA1334_RATES,
 212                 .formats = UDA1334_FORMATS,
 213         },
 214         .ops = &uda1334_dai_ops,
 215 };
 216
 217 static int uda1334_probe(struct snd_soc_component *component)
 218 {
 219         struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
 220
 221         uda1334->rate_constraint.list = &uda1334->rate_constraint_list[0];
 222         uda1334->rate_constraint.count =
 223                 ARRAY_SIZE(uda1334->rate_constraint_list);
 224
 225         return 0;
 226 }
 227
 228 static const struct snd_soc_component_driver soc_component_dev_uda1334 = {
 229         .probe                  = uda1334_probe,
 230         .controls               = uda1334_snd_controls,
 231         .num_controls           = ARRAY_SIZE(uda1334_snd_controls),
 232         .dapm_widgets           = uda1334_dapm_widgets,
 233         .num_dapm_widgets       = ARRAY_SIZE(uda1334_dapm_widgets),
 234         .dapm_routes            = uda1334_dapm_routes,
 235         .num_dapm_routes        = ARRAY_SIZE(uda1334_dapm_routes),
 236         .idle_bias_on           = 1,
 237         .use_pmdown_time        = 1,
 238         .endianness             = 1,
 239         .non_legacy_dai_naming  = 1,
 240 };
 241
 242 static const struct of_device_id uda1334_of_match[] = {
 243         { .compatible = "nxp,uda1334" },
 244         { /* sentinel*/ }
 245 };
 246 MODULE_DEVICE_TABLE(of, uda1334_of_match);
 247
 248 static int uda1334_codec_probe(struct platform_device *pdev)
 249 {
 250         struct uda1334_priv *uda1334;
 251         int ret;
 252
 253         uda1334 = devm_kzalloc(&pdev->dev, sizeof(struct uda1334_priv),
 254                                GFP_KERNEL);
 255         if (!uda1334)
 256                 return -ENOMEM;
 257
 258         platform_set_drvdata(pdev, uda1334);
 259
 260         uda1334->mute = devm_gpiod_get(&pdev->dev, "nxp,mute", GPIOD_OUT_LOW);
 261         if (IS_ERR(uda1334->mute)) {
 262                 ret = PTR_ERR(uda1334->mute);
 263                 dev_err(&pdev->dev, "Failed to get mute line: %d\n", ret);
 264                 return ret;
 265         }
 266
 267         uda1334->deemph = devm_gpiod_get(&pdev->dev, "nxp,deemph", GPIOD_OUT_LOW);
 268         if (IS_ERR(uda1334->deemph)) {
 269                 ret = PTR_ERR(uda1334->deemph);
 270                 dev_err(&pdev->dev, "Failed to get deemph line: %d\n", ret);
 271                 return ret;
 272         }
 273
 274         ret = devm_snd_soc_register_component(&pdev->dev,
 275                                               &soc_component_dev_uda1334,
 276                                               &uda1334_dai, 1);
 277         if (ret < 0)
 278                 dev_err(&pdev->dev, "Failed to register component: %d\n", ret);
 279
 280         return ret;
 281 }
 282
 283 static struct platform_driver uda1334_codec_driver = {
 284         .probe          = uda1334_codec_probe,
 285         .driver         = {
 286                 .name   = "uda1334-codec",
 287                 .of_match_table = uda1334_of_match,
 288         },
 289 };
 290 module_platform_driver(uda1334_codec_driver);
 291
 292 MODULE_DESCRIPTION("ASoC UDA1334 driver");
 293 MODULE_AUTHOR("Andra Danciu <andradanciu1997@gmail.com>");
 294 MODULE_ALIAS("platform:uda1334-codec");
 295 MODULE_LICENSE("GPL v2");