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