sound/soc/meson/aiu-acodec-ctrl.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 <sound/pcm_params.h>
   8 #include <sound/soc.h>
   9 #include <sound/soc-dai.h>
  10
  11 #include <dt-bindings/sound/meson-aiu.h>
  12 #include "aiu.h"
  13 #include "meson-codec-glue.h"
  14
  15 #define CTRL_DIN_EN                     15
  16 #define CTRL_CLK_INV                    BIT(14)
  17 #define CTRL_LRCLK_INV                  BIT(13)
  18 #define CTRL_I2S_IN_BCLK_SRC            BIT(11)
  19 #define CTRL_DIN_LRCLK_SRC_SHIFT        6
  20 #define CTRL_DIN_LRCLK_SRC              (0x3 << CTRL_DIN_LRCLK_SRC_SHIFT)
  21 #define CTRL_BCLK_MCLK_SRC              GENMASK(5, 4)
  22 #define CTRL_DIN_SKEW                   GENMASK(3, 2)
  23 #define CTRL_I2S_OUT_LANE_SRC           0
  24
  25 #define AIU_ACODEC_OUT_CHMAX            2
  26
  27 static const char * const aiu_acodec_ctrl_mux_texts[] = {
  28         "DISABLED", "I2S", "PCM",
  29 };
  30
  31 static int aiu_acodec_ctrl_mux_put_enum(struct snd_kcontrol *kcontrol,
  32                                         struct snd_ctl_elem_value *ucontrol)
  33 {
  34         struct snd_soc_component *component =
  35                 snd_soc_dapm_kcontrol_component(kcontrol);
  36         struct snd_soc_dapm_context *dapm =
  37                 snd_soc_dapm_kcontrol_dapm(kcontrol);
  38         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
  39         unsigned int mux, changed;
  40
  41         mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
  42         changed = snd_soc_component_test_bits(component, e->reg,
  43                                               CTRL_DIN_LRCLK_SRC,
  44                                               FIELD_PREP(CTRL_DIN_LRCLK_SRC,
  45                                                          mux));
  46
  47         if (!changed)
  48                 return 0;
  49
  50         /* Force disconnect of the mux while updating */
  51         snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
  52
  53         snd_soc_component_update_bits(component, e->reg,
  54                                       CTRL_DIN_LRCLK_SRC |
  55                                       CTRL_BCLK_MCLK_SRC,
  56                                       FIELD_PREP(CTRL_DIN_LRCLK_SRC, mux) |
  57                                       FIELD_PREP(CTRL_BCLK_MCLK_SRC, mux));
  58
  59         snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
  60
  61         return 1;
  62 }
  63
  64 static SOC_ENUM_SINGLE_DECL(aiu_acodec_ctrl_mux_enum, AIU_ACODEC_CTRL,
  65                             CTRL_DIN_LRCLK_SRC_SHIFT,
  66                             aiu_acodec_ctrl_mux_texts);
  67
  68 static const struct snd_kcontrol_new aiu_acodec_ctrl_mux =
  69         SOC_DAPM_ENUM_EXT("ACodec Source", aiu_acodec_ctrl_mux_enum,
  70                           snd_soc_dapm_get_enum_double,
  71                           aiu_acodec_ctrl_mux_put_enum);
  72
  73 static const struct snd_kcontrol_new aiu_acodec_ctrl_out_enable =
  74         SOC_DAPM_SINGLE_AUTODISABLE("Switch", AIU_ACODEC_CTRL,
  75                                     CTRL_DIN_EN, 1, 0);
  76
  77 static const struct snd_soc_dapm_widget aiu_acodec_ctrl_widgets[] = {
  78         SND_SOC_DAPM_MUX("ACODEC SRC", SND_SOC_NOPM, 0, 0,
  79                          &aiu_acodec_ctrl_mux),
  80         SND_SOC_DAPM_SWITCH("ACODEC OUT EN", SND_SOC_NOPM, 0, 0,
  81                             &aiu_acodec_ctrl_out_enable),
  82 };
  83
  84 static int aiu_acodec_ctrl_input_hw_params(struct snd_pcm_substream *substream,
  85                                            struct snd_pcm_hw_params *params,
  86                                            struct snd_soc_dai *dai)
  87 {
  88         struct meson_codec_glue_input *data;
  89         int ret;
  90
  91         ret = meson_codec_glue_input_hw_params(substream, params, dai);
  92         if (ret)
  93                 return ret;
  94
  95         /* The glue will provide 1 lane out of the 4 to the output */
  96         data = meson_codec_glue_input_get_data(dai);
  97         data->params.channels_min = min_t(unsigned int, AIU_ACODEC_OUT_CHMAX,
  98                                           data->params.channels_min);
  99         data->params.channels_max = min_t(unsigned int, AIU_ACODEC_OUT_CHMAX,
 100                                           data->params.channels_max);
 101
 102         return 0;
 103 }
 104
 105 static const struct snd_soc_dai_ops aiu_acodec_ctrl_input_ops = {
 106         .probe          = meson_codec_glue_input_dai_probe,
 107         .remove         = meson_codec_glue_input_dai_remove,
 108         .hw_params      = aiu_acodec_ctrl_input_hw_params,
 109         .set_fmt        = meson_codec_glue_input_set_fmt,
 110 };
 111
 112 static const struct snd_soc_dai_ops aiu_acodec_ctrl_output_ops = {
 113         .startup        = meson_codec_glue_output_startup,
 114 };
 115
 116 #define AIU_ACODEC_CTRL_FORMATS                                 \
 117         (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |   \
 118          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE |   \
 119          SNDRV_PCM_FMTBIT_S32_LE)
 120
 121 #define AIU_ACODEC_STREAM(xname, xsuffix, xchmax)               \
 122 {                                                               \
 123         .stream_name    = xname " " xsuffix,                    \
 124         .channels_min   = 1,                                    \
 125         .channels_max   = (xchmax),                             \
 126         .rate_min       = 5512,                                 \
 127         .rate_max       = 192000,                               \
 128         .formats        = AIU_ACODEC_CTRL_FORMATS,              \
 129 }
 130
 131 #define AIU_ACODEC_INPUT(xname) {                               \
 132         .name = "ACODEC CTRL " xname,                           \
 133         .playback = AIU_ACODEC_STREAM(xname, "Playback", 8),    \
 134         .ops = &aiu_acodec_ctrl_input_ops,                      \
 135 }
 136
 137 #define AIU_ACODEC_OUTPUT(xname) {                              \
 138         .name = "ACODEC CTRL " xname,                           \
 139         .capture = AIU_ACODEC_STREAM(xname, "Capture", AIU_ACODEC_OUT_CHMAX), \
 140         .ops = &aiu_acodec_ctrl_output_ops,                     \
 141 }
 142
 143 static struct snd_soc_dai_driver aiu_acodec_ctrl_dai_drv[] = {
 144         [CTRL_I2S] = AIU_ACODEC_INPUT("ACODEC I2S IN"),
 145         [CTRL_PCM] = AIU_ACODEC_INPUT("ACODEC PCM IN"),
 146         [CTRL_OUT] = AIU_ACODEC_OUTPUT("ACODEC OUT"),
 147 };
 148
 149 static const struct snd_soc_dapm_route aiu_acodec_ctrl_routes[] = {
 150         { "ACODEC SRC", "I2S", "ACODEC I2S IN Playback" },
 151         { "ACODEC SRC", "PCM", "ACODEC PCM IN Playback" },
 152         { "ACODEC OUT EN", "Switch", "ACODEC SRC" },
 153         { "ACODEC OUT Capture", NULL, "ACODEC OUT EN" },
 154 };
 155
 156 static const struct snd_kcontrol_new aiu_acodec_ctrl_controls[] = {
 157         SOC_SINGLE("ACODEC I2S Lane Select", AIU_ACODEC_CTRL,
 158                    CTRL_I2S_OUT_LANE_SRC, 3, 0),
 159 };
 160
 161 static int aiu_acodec_of_xlate_dai_name(struct snd_soc_component *component,
 162                                         const struct of_phandle_args *args,
 163                                         const char **dai_name)
 164 {
 165         return aiu_of_xlate_dai_name(component, args, dai_name, AIU_ACODEC);
 166 }
 167
 168 static int aiu_acodec_ctrl_component_probe(struct snd_soc_component *component)
 169 {
 170         /*
 171          * NOTE: Din Skew setting
 172          * According to the documentation, the following update adds one delay
 173          * to the din line. Without this, the output saturates. This happens
 174          * regardless of the link format (i2s or left_j) so it is not clear what
 175          * it actually does but it seems to be required
 176          */
 177         snd_soc_component_update_bits(component, AIU_ACODEC_CTRL,
 178                                       CTRL_DIN_SKEW,
 179                                       FIELD_PREP(CTRL_DIN_SKEW, 2));
 180
 181         return 0;
 182 }
 183
 184 static const struct snd_soc_component_driver aiu_acodec_ctrl_component = {
 185         .name                   = "AIU Internal DAC Codec Control",
 186         .probe                  = aiu_acodec_ctrl_component_probe,
 187         .controls               = aiu_acodec_ctrl_controls,
 188         .num_controls           = ARRAY_SIZE(aiu_acodec_ctrl_controls),
 189         .dapm_widgets           = aiu_acodec_ctrl_widgets,
 190         .num_dapm_widgets       = ARRAY_SIZE(aiu_acodec_ctrl_widgets),
 191         .dapm_routes            = aiu_acodec_ctrl_routes,
 192         .num_dapm_routes        = ARRAY_SIZE(aiu_acodec_ctrl_routes),
 193         .of_xlate_dai_name      = aiu_acodec_of_xlate_dai_name,
 194         .endianness             = 1,
 195 #ifdef CONFIG_DEBUG_FS
 196         .debugfs_prefix         = "acodec",
 197 #endif
 198 };
 199
 200 int aiu_acodec_ctrl_register_component(struct device *dev)
 201 {
 202         return snd_soc_register_component(dev, &aiu_acodec_ctrl_component,
 203                                           aiu_acodec_ctrl_dai_drv,
 204                                           ARRAY_SIZE(aiu_acodec_ctrl_dai_drv));
 205 }