sound/soc/meson/g12a-toacodec.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2020 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 <linux/regulator/consumer.h>
  12 #include <linux/reset.h>
  13 #include <sound/soc.h>
  14 #include <sound/soc-dai.h>
  15
  16 #include <dt-bindings/sound/meson-g12a-toacodec.h>
  17 #include "axg-tdm.h"
  18 #include "meson-codec-glue.h"
  19
  20 #define G12A_TOACODEC_DRV_NAME "g12a-toacodec"
  21
  22 #define TOACODEC_CTRL0                  0x0
  23 #define  CTRL0_ENABLE_SHIFT             31
  24 #define  CTRL0_DAT_SEL_SM1_MSB          19
  25 #define  CTRL0_DAT_SEL_SM1_LSB          18
  26 #define  CTRL0_DAT_SEL_MSB              15
  27 #define  CTRL0_DAT_SEL_LSB              14
  28 #define  CTRL0_LANE_SEL_SM1             16
  29 #define  CTRL0_LANE_SEL                 12
  30 #define  CTRL0_LRCLK_SEL_SM1_MSB        14
  31 #define  CTRL0_LRCLK_SEL_SM1_LSB        12
  32 #define  CTRL0_LRCLK_SEL_MSB            9
  33 #define  CTRL0_LRCLK_SEL_LSB            8
  34 #define  CTRL0_LRCLK_INV_SM1            BIT(10)
  35 #define  CTRL0_BLK_CAP_INV_SM1          BIT(9)
  36 #define  CTRL0_BLK_CAP_INV              BIT(7)
  37 #define  CTRL0_BCLK_O_INV_SM1           BIT(8)
  38 #define  CTRL0_BCLK_O_INV               BIT(6)
  39 #define  CTRL0_BCLK_SEL_SM1_MSB         6
  40 #define  CTRL0_BCLK_SEL_MSB             5
  41 #define  CTRL0_BCLK_SEL_LSB             4
  42 #define  CTRL0_MCLK_SEL                 GENMASK(2, 0)
  43
  44 #define TOACODEC_OUT_CHMAX              2
  45
  46 struct g12a_toacodec {
  47         struct regmap_field *field_dat_sel;
  48         struct regmap_field *field_lrclk_sel;
  49         struct regmap_field *field_bclk_sel;
  50 };
  51
  52 struct g12a_toacodec_match_data {
  53         const struct snd_soc_component_driver *component_drv;
  54         struct reg_field field_dat_sel;
  55         struct reg_field field_lrclk_sel;
  56         struct reg_field field_bclk_sel;
  57 };
  58
  59 static const char * const g12a_toacodec_mux_texts[] = {
  60         "I2S A", "I2S B", "I2S C",
  61 };
  62
  63 static int g12a_toacodec_mux_put_enum(struct snd_kcontrol *kcontrol,
  64                                       struct snd_ctl_elem_value *ucontrol)
  65 {
  66         struct snd_soc_component *component =
  67                 snd_soc_dapm_kcontrol_component(kcontrol);
  68         struct g12a_toacodec *priv = snd_soc_component_get_drvdata(component);
  69         struct snd_soc_dapm_context *dapm =
  70                 snd_soc_dapm_kcontrol_dapm(kcontrol);
  71         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
  72         unsigned int mux, reg;
  73
  74         mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
  75         regmap_field_read(priv->field_dat_sel, &reg);
  76
  77         if (mux == reg)
  78                 return 0;
  79
  80         /* Force disconnect of the mux while updating */
  81         snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
  82
  83         regmap_field_write(priv->field_dat_sel, mux);
  84         regmap_field_write(priv->field_lrclk_sel, mux);
  85         regmap_field_write(priv->field_bclk_sel, mux);
  86
  87         /*
  88          * FIXME:
  89          * On this soc, the glue gets the MCLK directly from the clock
  90          * controller instead of going the through the TDM interface.
  91          *
  92          * Here we assume interface A uses clock A, etc ... While it is
  93          * true for now, it could be different. Instead the glue should
  94          * find out the clock used by the interface and select the same
  95          * source. For that, we will need regmap backed clock mux which
  96          * is a work in progress
  97          */
  98         snd_soc_component_update_bits(component, e->reg,
  99                                       CTRL0_MCLK_SEL,
 100                                       FIELD_PREP(CTRL0_MCLK_SEL, mux));
 101
 102         snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
 103
 104         return 0;
 105 }
 106
 107 static SOC_ENUM_SINGLE_DECL(g12a_toacodec_mux_enum, TOACODEC_CTRL0,
 108                             CTRL0_DAT_SEL_LSB,
 109                             g12a_toacodec_mux_texts);
 110
 111 static SOC_ENUM_SINGLE_DECL(sm1_toacodec_mux_enum, TOACODEC_CTRL0,
 112                             CTRL0_DAT_SEL_SM1_LSB,
 113                             g12a_toacodec_mux_texts);
 114
 115 static const struct snd_kcontrol_new g12a_toacodec_mux =
 116         SOC_DAPM_ENUM_EXT("Source", g12a_toacodec_mux_enum,
 117                           snd_soc_dapm_get_enum_double,
 118                           g12a_toacodec_mux_put_enum);
 119
 120 static const struct snd_kcontrol_new sm1_toacodec_mux =
 121         SOC_DAPM_ENUM_EXT("Source", sm1_toacodec_mux_enum,
 122                           snd_soc_dapm_get_enum_double,
 123                           g12a_toacodec_mux_put_enum);
 124
 125 static const struct snd_kcontrol_new g12a_toacodec_out_enable =
 126         SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOACODEC_CTRL0,
 127                                     CTRL0_ENABLE_SHIFT, 1, 0);
 128
 129 static const struct snd_soc_dapm_widget g12a_toacodec_widgets[] = {
 130         SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
 131                          &g12a_toacodec_mux),
 132         SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
 133                             &g12a_toacodec_out_enable),
 134 };
 135
 136 static const struct snd_soc_dapm_widget sm1_toacodec_widgets[] = {
 137         SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
 138                          &sm1_toacodec_mux),
 139         SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
 140                             &g12a_toacodec_out_enable),
 141 };
 142
 143 static int g12a_toacodec_input_hw_params(struct snd_pcm_substream *substream,
 144                                          struct snd_pcm_hw_params *params,
 145                                          struct snd_soc_dai *dai)
 146 {
 147         struct meson_codec_glue_input *data;
 148         int ret;
 149
 150         ret = meson_codec_glue_input_hw_params(substream, params, dai);
 151         if (ret)
 152                 return ret;
 153
 154         /* The glue will provide 1 lane out of the 4 to the output */
 155         data = meson_codec_glue_input_get_data(dai);
 156         data->params.channels_min = min_t(unsigned int, TOACODEC_OUT_CHMAX,
 157                                         data->params.channels_min);
 158         data->params.channels_max = min_t(unsigned int, TOACODEC_OUT_CHMAX,
 159                                         data->params.channels_max);
 160
 161         return 0;
 162 }
 163
 164 static const struct snd_soc_dai_ops g12a_toacodec_input_ops = {
 165         .hw_params      = g12a_toacodec_input_hw_params,
 166         .set_fmt        = meson_codec_glue_input_set_fmt,
 167 };
 168
 169 static const struct snd_soc_dai_ops g12a_toacodec_output_ops = {
 170         .startup        = meson_codec_glue_output_startup,
 171 };
 172
 173 #define TOACODEC_STREAM(xname, xsuffix, xchmax)                 \
 174 {                                                               \
 175         .stream_name    = xname " " xsuffix,                    \
 176         .channels_min   = 1,                                    \
 177         .channels_max   = (xchmax),                             \
 178         .rate_min       = 5512,                                 \
 179         .rate_max       = 192000,                               \
 180         .formats        = AXG_TDM_FORMATS,                      \
 181 }
 182
 183 #define TOACODEC_INPUT(xname, xid) {                                    \
 184         .name = xname,                                                  \
 185         .id = (xid),                                                    \
 186         .playback = TOACODEC_STREAM(xname, "Playback", 8),              \
 187         .ops = &g12a_toacodec_input_ops,                                \
 188         .probe = meson_codec_glue_input_dai_probe,                      \
 189         .remove = meson_codec_glue_input_dai_remove,                    \
 190 }
 191
 192 #define TOACODEC_OUTPUT(xname, xid) {                                   \
 193         .name = xname,                                                  \
 194         .id = (xid),                                                    \
 195         .capture = TOACODEC_STREAM(xname, "Capture", TOACODEC_OUT_CHMAX), \
 196         .ops = &g12a_toacodec_output_ops,                               \
 197 }
 198
 199 static struct snd_soc_dai_driver g12a_toacodec_dai_drv[] = {
 200         TOACODEC_INPUT("IN A", TOACODEC_IN_A),
 201         TOACODEC_INPUT("IN B", TOACODEC_IN_B),
 202         TOACODEC_INPUT("IN C", TOACODEC_IN_C),
 203         TOACODEC_OUTPUT("OUT", TOACODEC_OUT),
 204 };
 205
 206 static int g12a_toacodec_component_probe(struct snd_soc_component *c)
 207 {
 208         /* Initialize the static clock parameters */
 209         return snd_soc_component_write(c, TOACODEC_CTRL0,
 210                                        CTRL0_BLK_CAP_INV);
 211 }
 212
 213 static int sm1_toacodec_component_probe(struct snd_soc_component *c)
 214 {
 215         /* Initialize the static clock parameters */
 216         return snd_soc_component_write(c, TOACODEC_CTRL0,
 217                                        CTRL0_BLK_CAP_INV_SM1);
 218 }
 219
 220 static const struct snd_soc_dapm_route g12a_toacodec_routes[] = {
 221         { "SRC", "I2S A", "IN A Playback" },
 222         { "SRC", "I2S B", "IN B Playback" },
 223         { "SRC", "I2S C", "IN C Playback" },
 224         { "OUT EN", "Switch", "SRC" },
 225         { "OUT Capture", NULL, "OUT EN" },
 226 };
 227
 228 static const struct snd_kcontrol_new g12a_toacodec_controls[] = {
 229         SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL, 3, 0),
 230 };
 231
 232 static const struct snd_kcontrol_new sm1_toacodec_controls[] = {
 233         SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL_SM1, 3, 0),
 234 };
 235
 236 static const struct snd_soc_component_driver g12a_toacodec_component_drv = {
 237         .probe                  = g12a_toacodec_component_probe,
 238         .controls               = g12a_toacodec_controls,
 239         .num_controls           = ARRAY_SIZE(g12a_toacodec_controls),
 240         .dapm_widgets           = g12a_toacodec_widgets,
 241         .num_dapm_widgets       = ARRAY_SIZE(g12a_toacodec_widgets),
 242         .dapm_routes            = g12a_toacodec_routes,
 243         .num_dapm_routes        = ARRAY_SIZE(g12a_toacodec_routes),
 244         .endianness             = 1,
 245         .non_legacy_dai_naming  = 1,
 246 };
 247
 248 static const struct snd_soc_component_driver sm1_toacodec_component_drv = {
 249         .probe                  = sm1_toacodec_component_probe,
 250         .controls               = sm1_toacodec_controls,
 251         .num_controls           = ARRAY_SIZE(sm1_toacodec_controls),
 252         .dapm_widgets           = sm1_toacodec_widgets,
 253         .num_dapm_widgets       = ARRAY_SIZE(sm1_toacodec_widgets),
 254         .dapm_routes            = g12a_toacodec_routes,
 255         .num_dapm_routes        = ARRAY_SIZE(g12a_toacodec_routes),
 256         .endianness             = 1,
 257         .non_legacy_dai_naming  = 1,
 258 };
 259
 260 static const struct regmap_config g12a_toacodec_regmap_cfg = {
 261         .reg_bits       = 32,
 262         .val_bits       = 32,
 263         .reg_stride     = 4,
 264 };
 265
 266 static const struct g12a_toacodec_match_data g12a_toacodec_match_data = {
 267         .component_drv  = &g12a_toacodec_component_drv,
 268         .field_dat_sel  = REG_FIELD(TOACODEC_CTRL0, 14, 15),
 269         .field_lrclk_sel = REG_FIELD(TOACODEC_CTRL0, 8, 9),
 270         .field_bclk_sel = REG_FIELD(TOACODEC_CTRL0, 4, 5),
 271 };
 272
 273 static const struct g12a_toacodec_match_data sm1_toacodec_match_data = {
 274         .component_drv  = &sm1_toacodec_component_drv,
 275         .field_dat_sel  = REG_FIELD(TOACODEC_CTRL0, 18, 19),
 276         .field_lrclk_sel = REG_FIELD(TOACODEC_CTRL0, 12, 14),
 277         .field_bclk_sel = REG_FIELD(TOACODEC_CTRL0, 4, 6),
 278 };
 279
 280 static const struct of_device_id g12a_toacodec_of_match[] = {
 281         {
 282                 .compatible = "amlogic,g12a-toacodec",
 283                 .data = &g12a_toacodec_match_data,
 284         },
 285         {
 286                 .compatible = "amlogic,sm1-toacodec",
 287                 .data = &sm1_toacodec_match_data,
 288         },
 289         {}
 290 };
 291 MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match);
 292
 293 static int g12a_toacodec_probe(struct platform_device *pdev)
 294 {
 295         const struct g12a_toacodec_match_data *data;
 296         struct device *dev = &pdev->dev;
 297         struct g12a_toacodec *priv;
 298         void __iomem *regs;
 299         struct regmap *map;
 300         int ret;
 301
 302         data = device_get_match_data(dev);
 303         if (!data) {
 304                 dev_err(dev, "failed to match device\n");
 305                 return -ENODEV;
 306         }
 307
 308         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 309         if (!priv)
 310                 return -ENOMEM;
 311
 312         platform_set_drvdata(pdev, priv);
 313
 314         ret = device_reset(dev);
 315         if (ret)
 316                 return ret;
 317
 318         regs = devm_platform_ioremap_resource(pdev, 0);
 319         if (IS_ERR(regs))
 320                 return PTR_ERR(regs);
 321
 322         map = devm_regmap_init_mmio(dev, regs, &g12a_toacodec_regmap_cfg);
 323         if (IS_ERR(map)) {
 324                 dev_err(dev, "failed to init regmap: %ld\n",
 325                         PTR_ERR(map));
 326                 return PTR_ERR(map);
 327         }
 328
 329         priv->field_dat_sel = devm_regmap_field_alloc(dev, map, data->field_dat_sel);
 330         if (IS_ERR(priv->field_dat_sel))
 331                 return PTR_ERR(priv->field_dat_sel);
 332
 333         priv->field_lrclk_sel = devm_regmap_field_alloc(dev, map, data->field_lrclk_sel);
 334         if (IS_ERR(priv->field_lrclk_sel))
 335                 return PTR_ERR(priv->field_lrclk_sel);
 336
 337         priv->field_bclk_sel = devm_regmap_field_alloc(dev, map, data->field_bclk_sel);
 338         if (IS_ERR(priv->field_bclk_sel))
 339                 return PTR_ERR(priv->field_bclk_sel);
 340
 341         return devm_snd_soc_register_component(dev,
 342                         data->component_drv, g12a_toacodec_dai_drv,
 343                         ARRAY_SIZE(g12a_toacodec_dai_drv));
 344 }
 345
 346 static struct platform_driver g12a_toacodec_pdrv = {
 347         .driver = {
 348                 .name = G12A_TOACODEC_DRV_NAME,
 349                 .of_match_table = g12a_toacodec_of_match,
 350         },
 351         .probe = g12a_toacodec_probe,
 352 };
 353 module_platform_driver(g12a_toacodec_pdrv);
 354
 355 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 356 MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver");
 357 MODULE_LICENSE("GPL v2");