sound/soc/meson/g12a-tohdmitx.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2019 BayLibre, SAS.
   4 // Author: Jerome Brunet <jbrunet@baylibre.com>
   5
   6 #include <linux/bitfield.h>
   7 #include <linux/clk.h>
   8 #include <linux/module.h>
   9 #include <sound/pcm_params.h>
  10 #include <linux/regmap.h>
  11 #include <sound/soc.h>
  12 #include <sound/soc-dai.h>
  13
  14 #include <dt-bindings/sound/meson-g12a-tohdmitx.h>
  15
  16 #define G12A_TOHDMITX_DRV_NAME "g12a-tohdmitx"
  17
  18 #define TOHDMITX_CTRL0                  0x0
  19 #define  CTRL0_ENABLE_SHIFT             31
  20 #define  CTRL0_I2S_DAT_SEL              GENMASK(13, 12)
  21 #define  CTRL0_I2S_LRCLK_SEL            GENMASK(9, 8)
  22 #define  CTRL0_I2S_BLK_CAP_INV          BIT(7)
  23 #define  CTRL0_I2S_BCLK_O_INV           BIT(6)
  24 #define  CTRL0_I2S_BCLK_SEL             GENMASK(5, 4)
  25 #define  CTRL0_SPDIF_CLK_CAP_INV        BIT(3)
  26 #define  CTRL0_SPDIF_CLK_O_INV          BIT(2)
  27 #define  CTRL0_SPDIF_SEL                BIT(1)
  28 #define  CTRL0_SPDIF_CLK_SEL            BIT(0)
  29
  30 struct g12a_tohdmitx_input {
  31         struct snd_soc_pcm_stream params;
  32         unsigned int fmt;
  33 };
  34
  35 static struct snd_soc_dapm_widget *
  36 g12a_tohdmitx_get_input(struct snd_soc_dapm_widget *w)
  37 {
  38         struct snd_soc_dapm_path *p = NULL;
  39         struct snd_soc_dapm_widget *in;
  40
  41         snd_soc_dapm_widget_for_each_source_path(w, p) {
  42                 if (!p->connect)
  43                         continue;
  44
  45                 /* Check that we still are in the same component */
  46                 if (snd_soc_dapm_to_component(w->dapm) !=
  47                     snd_soc_dapm_to_component(p->source->dapm))
  48                         continue;
  49
  50                 if (p->source->id == snd_soc_dapm_dai_in)
  51                         return p->source;
  52
  53                 in = g12a_tohdmitx_get_input(p->source);
  54                 if (in)
  55                         return in;
  56         }
  57
  58         return NULL;
  59 }
  60
  61 static struct g12a_tohdmitx_input *
  62 g12a_tohdmitx_get_input_data(struct snd_soc_dapm_widget *w)
  63 {
  64         struct snd_soc_dapm_widget *in =
  65                 g12a_tohdmitx_get_input(w);
  66         struct snd_soc_dai *dai;
  67
  68         if (WARN_ON(!in))
  69                 return NULL;
  70
  71         dai = in->priv;
  72
  73         return dai->playback_dma_data;
  74 }
  75
  76 static const char * const g12a_tohdmitx_i2s_mux_texts[] = {
  77         "I2S A", "I2S B", "I2S C",
  78 };
  79
  80 static SOC_ENUM_SINGLE_EXT_DECL(g12a_tohdmitx_i2s_mux_enum,
  81                                 g12a_tohdmitx_i2s_mux_texts);
  82
  83 static int g12a_tohdmitx_get_input_val(struct snd_soc_component *component,
  84                                        unsigned int mask)
  85 {
  86         unsigned int val;
  87
  88         snd_soc_component_read(component, TOHDMITX_CTRL0, &val);
  89         return (val & mask) >> __ffs(mask);
  90 }
  91
  92 static int g12a_tohdmitx_i2s_mux_get_enum(struct snd_kcontrol *kcontrol,
  93                                           struct snd_ctl_elem_value *ucontrol)
  94 {
  95         struct snd_soc_component *component =
  96                 snd_soc_dapm_kcontrol_component(kcontrol);
  97
  98         ucontrol->value.enumerated.item[0] =
  99                 g12a_tohdmitx_get_input_val(component, CTRL0_I2S_DAT_SEL);
 100
 101         return 0;
 102 }
 103
 104 static int g12a_tohdmitx_i2s_mux_put_enum(struct snd_kcontrol *kcontrol,
 105                                           struct snd_ctl_elem_value *ucontrol)
 106 {
 107         struct snd_soc_component *component =
 108                 snd_soc_dapm_kcontrol_component(kcontrol);
 109         struct snd_soc_dapm_context *dapm =
 110                 snd_soc_dapm_kcontrol_dapm(kcontrol);
 111         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
 112         unsigned int mux = ucontrol->value.enumerated.item[0];
 113         unsigned int val = g12a_tohdmitx_get_input_val(component,
 114                                                        CTRL0_I2S_DAT_SEL);
 115
 116         /* Force disconnect of the mux while updating */
 117         if (val != mux)
 118                 snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
 119
 120         snd_soc_component_update_bits(component, TOHDMITX_CTRL0,
 121                                       CTRL0_I2S_DAT_SEL |
 122                                       CTRL0_I2S_LRCLK_SEL |
 123                                       CTRL0_I2S_BCLK_SEL,
 124                                       FIELD_PREP(CTRL0_I2S_DAT_SEL, mux) |
 125                                       FIELD_PREP(CTRL0_I2S_LRCLK_SEL, mux) |
 126                                       FIELD_PREP(CTRL0_I2S_BCLK_SEL, mux));
 127
 128         snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
 129
 130         return 0;
 131 }
 132
 133 static const struct snd_kcontrol_new g12a_tohdmitx_i2s_mux =
 134         SOC_DAPM_ENUM_EXT("I2S Source", g12a_tohdmitx_i2s_mux_enum,
 135                           g12a_tohdmitx_i2s_mux_get_enum,
 136                           g12a_tohdmitx_i2s_mux_put_enum);
 137
 138 static const char * const g12a_tohdmitx_spdif_mux_texts[] = {
 139         "SPDIF A", "SPDIF B",
 140 };
 141
 142 static SOC_ENUM_SINGLE_EXT_DECL(g12a_tohdmitx_spdif_mux_enum,
 143                                 g12a_tohdmitx_spdif_mux_texts);
 144
 145 static int g12a_tohdmitx_spdif_mux_get_enum(struct snd_kcontrol *kcontrol,
 146                                             struct snd_ctl_elem_value *ucontrol)
 147 {
 148         struct snd_soc_component *component =
 149                 snd_soc_dapm_kcontrol_component(kcontrol);
 150
 151         ucontrol->value.enumerated.item[0] =
 152                 g12a_tohdmitx_get_input_val(component, CTRL0_SPDIF_SEL);
 153
 154         return 0;
 155 }
 156
 157 static int g12a_tohdmitx_spdif_mux_put_enum(struct snd_kcontrol *kcontrol,
 158                                             struct snd_ctl_elem_value *ucontrol)
 159 {
 160         struct snd_soc_component *component =
 161                 snd_soc_dapm_kcontrol_component(kcontrol);
 162         struct snd_soc_dapm_context *dapm =
 163                 snd_soc_dapm_kcontrol_dapm(kcontrol);
 164         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
 165         unsigned int mux = ucontrol->value.enumerated.item[0];
 166         unsigned int val = g12a_tohdmitx_get_input_val(component,
 167                                                        CTRL0_SPDIF_SEL);
 168
 169         /* Force disconnect of the mux while updating */
 170         if (val != mux)
 171                 snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
 172
 173         snd_soc_component_update_bits(component, TOHDMITX_CTRL0,
 174                                       CTRL0_SPDIF_SEL |
 175                                       CTRL0_SPDIF_CLK_SEL,
 176                                       FIELD_PREP(CTRL0_SPDIF_SEL, mux) |
 177                                       FIELD_PREP(CTRL0_SPDIF_CLK_SEL, mux));
 178
 179         snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
 180
 181         return 0;
 182 }
 183
 184 static const struct snd_kcontrol_new g12a_tohdmitx_spdif_mux =
 185         SOC_DAPM_ENUM_EXT("SPDIF Source", g12a_tohdmitx_spdif_mux_enum,
 186                           g12a_tohdmitx_spdif_mux_get_enum,
 187                           g12a_tohdmitx_spdif_mux_put_enum);
 188
 189 static const struct snd_kcontrol_new g12a_tohdmitx_out_enable =
 190         SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOHDMITX_CTRL0,
 191                                     CTRL0_ENABLE_SHIFT, 1, 0);
 192
 193 static const struct snd_soc_dapm_widget g12a_tohdmitx_widgets[] = {
 194         SND_SOC_DAPM_MUX("I2S SRC", SND_SOC_NOPM, 0, 0,
 195                          &g12a_tohdmitx_i2s_mux),
 196         SND_SOC_DAPM_SWITCH("I2S OUT EN", SND_SOC_NOPM, 0, 0,
 197                             &g12a_tohdmitx_out_enable),
 198         SND_SOC_DAPM_MUX("SPDIF SRC", SND_SOC_NOPM, 0, 0,
 199                          &g12a_tohdmitx_spdif_mux),
 200         SND_SOC_DAPM_SWITCH("SPDIF OUT EN", SND_SOC_NOPM, 0, 0,
 201                             &g12a_tohdmitx_out_enable),
 202 };
 203
 204 static int g12a_tohdmitx_input_probe(struct snd_soc_dai *dai)
 205 {
 206         struct g12a_tohdmitx_input *data;
 207
 208         data = kzalloc(sizeof(*data), GFP_KERNEL);
 209         if (!data)
 210                 return -ENOMEM;
 211
 212         dai->playback_dma_data = data;
 213         return 0;
 214 }
 215
 216 static int g12a_tohdmitx_input_remove(struct snd_soc_dai *dai)
 217 {
 218         kfree(dai->playback_dma_data);
 219         return 0;
 220 }
 221
 222 static int g12a_tohdmitx_input_hw_params(struct snd_pcm_substream *substream,
 223                                          struct snd_pcm_hw_params *params,
 224                                          struct snd_soc_dai *dai)
 225 {
 226         struct g12a_tohdmitx_input *data = dai->playback_dma_data;
 227
 228         data->params.rates = snd_pcm_rate_to_rate_bit(params_rate(params));
 229         data->params.rate_min = params_rate(params);
 230         data->params.rate_max = params_rate(params);
 231         data->params.formats = 1 << params_format(params);
 232         data->params.channels_min = params_channels(params);
 233         data->params.channels_max = params_channels(params);
 234         data->params.sig_bits = dai->driver->playback.sig_bits;
 235
 236         return 0;
 237 }
 238
 239
 240 static int g12a_tohdmitx_input_set_fmt(struct snd_soc_dai *dai,
 241                                        unsigned int fmt)
 242 {
 243         struct g12a_tohdmitx_input *data = dai->playback_dma_data;
 244
 245         /* Save the source stream format for the downstream link */
 246         data->fmt = fmt;
 247         return 0;
 248 }
 249
 250 static int g12a_tohdmitx_output_startup(struct snd_pcm_substream *substream,
 251                                         struct snd_soc_dai *dai)
 252 {
 253         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 254         struct g12a_tohdmitx_input *in_data =
 255                 g12a_tohdmitx_get_input_data(dai->capture_widget);
 256
 257         if (!in_data)
 258                 return -ENODEV;
 259
 260         if (WARN_ON(!rtd->dai_link->params)) {
 261                 dev_warn(dai->dev, "codec2codec link expected\n");
 262                 return -EINVAL;
 263         }
 264
 265         /* Replace link params with the input params */
 266         rtd->dai_link->params = &in_data->params;
 267
 268         if (!in_data->fmt)
 269                 return 0;
 270
 271         return snd_soc_runtime_set_dai_fmt(rtd, in_data->fmt);
 272 }
 273
 274 static const struct snd_soc_dai_ops g12a_tohdmitx_input_ops = {
 275         .hw_params      = g12a_tohdmitx_input_hw_params,
 276         .set_fmt        = g12a_tohdmitx_input_set_fmt,
 277 };
 278
 279 static const struct snd_soc_dai_ops g12a_tohdmitx_output_ops = {
 280         .startup        = g12a_tohdmitx_output_startup,
 281 };
 282
 283 #define TOHDMITX_SPDIF_FORMATS                                  \
 284         (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |   \
 285          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE)
 286
 287 #define TOHDMITX_I2S_FORMATS                                    \
 288         (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |   \
 289          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE |   \
 290          SNDRV_PCM_FMTBIT_S32_LE)
 291
 292 #define TOHDMITX_STREAM(xname, xsuffix, xfmt, xchmax)           \
 293 {                                                               \
 294         .stream_name    = xname " " xsuffix,                    \
 295         .channels_min   = 1,                                    \
 296         .channels_max   = (xchmax),                             \
 297         .rate_min       = 8000,                                 \
 298         .rate_max       = 192000,                               \
 299         .formats        = (xfmt),                               \
 300 }
 301
 302 #define TOHDMITX_IN(xname, xid, xfmt, xchmax) {                         \
 303         .name = xname,                                                  \
 304         .id = (xid),                                                    \
 305         .playback = TOHDMITX_STREAM(xname, "Playback", xfmt, xchmax),   \
 306         .ops = &g12a_tohdmitx_input_ops,                                \
 307         .probe = g12a_tohdmitx_input_probe,                             \
 308         .remove = g12a_tohdmitx_input_remove,                           \
 309 }
 310
 311 #define TOHDMITX_OUT(xname, xid, xfmt, xchmax) {                        \
 312         .name = xname,                                                  \
 313         .id = (xid),                                                    \
 314         .capture = TOHDMITX_STREAM(xname, "Capture", xfmt, xchmax),     \
 315         .ops = &g12a_tohdmitx_output_ops,                               \
 316 }
 317
 318 static struct snd_soc_dai_driver g12a_tohdmitx_dai_drv[] = {
 319         TOHDMITX_IN("I2S IN A", TOHDMITX_I2S_IN_A,
 320                     TOHDMITX_I2S_FORMATS, 8),
 321         TOHDMITX_IN("I2S IN B", TOHDMITX_I2S_IN_B,
 322                     TOHDMITX_I2S_FORMATS, 8),
 323         TOHDMITX_IN("I2S IN C", TOHDMITX_I2S_IN_C,
 324                     TOHDMITX_I2S_FORMATS, 8),
 325         TOHDMITX_OUT("I2S OUT", TOHDMITX_I2S_OUT,
 326                      TOHDMITX_I2S_FORMATS, 8),
 327         TOHDMITX_IN("SPDIF IN A", TOHDMITX_SPDIF_IN_A,
 328                     TOHDMITX_SPDIF_FORMATS, 2),
 329         TOHDMITX_IN("SPDIF IN B", TOHDMITX_SPDIF_IN_B,
 330                     TOHDMITX_SPDIF_FORMATS, 2),
 331         TOHDMITX_OUT("SPDIF OUT", TOHDMITX_SPDIF_OUT,
 332                      TOHDMITX_SPDIF_FORMATS, 2),
 333 };
 334
 335 static int g12a_tohdmi_component_probe(struct snd_soc_component *c)
 336 {
 337         /* Initialize the static clock parameters */
 338         return snd_soc_component_write(c, TOHDMITX_CTRL0,
 339                      CTRL0_I2S_BLK_CAP_INV | CTRL0_SPDIF_CLK_CAP_INV);
 340 }
 341
 342 static const struct snd_soc_dapm_route g12a_tohdmitx_routes[] = {
 343         { "I2S SRC", "I2S A", "I2S IN A Playback" },
 344         { "I2S SRC", "I2S B", "I2S IN B Playback" },
 345         { "I2S SRC", "I2S C", "I2S IN C Playback" },
 346         { "I2S OUT EN", "Switch", "I2S SRC" },
 347         { "I2S OUT Capture", NULL, "I2S OUT EN" },
 348         { "SPDIF SRC", "SPDIF A", "SPDIF IN A Playback" },
 349         { "SPDIF SRC", "SPDIF B", "SPDIF IN B Playback" },
 350         { "SPDIF OUT EN", "Switch", "SPDIF SRC" },
 351         { "SPDIF OUT Capture", NULL, "SPDIF OUT EN" },
 352 };
 353
 354 static const struct snd_soc_component_driver g12a_tohdmitx_component_drv = {
 355         .probe                  = g12a_tohdmi_component_probe,
 356         .dapm_widgets           = g12a_tohdmitx_widgets,
 357         .num_dapm_widgets       = ARRAY_SIZE(g12a_tohdmitx_widgets),
 358         .dapm_routes            = g12a_tohdmitx_routes,
 359         .num_dapm_routes        = ARRAY_SIZE(g12a_tohdmitx_routes),
 360         .endianness             = 1,
 361         .non_legacy_dai_naming  = 1,
 362 };
 363
 364 static const struct regmap_config g12a_tohdmitx_regmap_cfg = {
 365         .reg_bits       = 32,
 366         .val_bits       = 32,
 367         .reg_stride     = 4,
 368 };
 369
 370 static const struct of_device_id g12a_tohdmitx_of_match[] = {
 371         { .compatible = "amlogic,g12a-tohdmitx", },
 372         {}
 373 };
 374 MODULE_DEVICE_TABLE(of, g12a_tohdmitx_of_match);
 375
 376 static int g12a_tohdmitx_probe(struct platform_device *pdev)
 377 {
 378         struct device *dev = &pdev->dev;
 379         void __iomem *regs;
 380         struct regmap *map;
 381
 382         regs = devm_platform_ioremap_resource(pdev, 0);
 383         if (IS_ERR(regs))
 384                 return PTR_ERR(regs);
 385
 386         map = devm_regmap_init_mmio(dev, regs, &g12a_tohdmitx_regmap_cfg);
 387         if (IS_ERR(map)) {
 388                 dev_err(dev, "failed to init regmap: %ld\n",
 389                         PTR_ERR(map));
 390                 return PTR_ERR(map);
 391         }
 392
 393         return devm_snd_soc_register_component(dev,
 394                         &g12a_tohdmitx_component_drv, g12a_tohdmitx_dai_drv,
 395                         ARRAY_SIZE(g12a_tohdmitx_dai_drv));
 396 }
 397
 398 static struct platform_driver g12a_tohdmitx_pdrv = {
 399         .driver = {
 400                 .name = G12A_TOHDMITX_DRV_NAME,
 401                 .of_match_table = g12a_tohdmitx_of_match,
 402         },
 403         .probe = g12a_tohdmitx_probe,
 404 };
 405 module_platform_driver(g12a_tohdmitx_pdrv);
 406
 407 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 408 MODULE_DESCRIPTION("Amlogic G12a To HDMI Tx Control Codec Driver");
 409 MODULE_LICENSE("GPL v2");