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