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_SHIFT            14
  25 #define  CTRL0_DAT_SEL                  (0x3 << CTRL0_DAT_SEL_SHIFT)
  26 #define  CTRL0_LANE_SEL                 12
  27 #define  CTRL0_LRCLK_SEL                GENMASK(9, 8)
  28 #define  CTRL0_BLK_CAP_INV              BIT(7)
  29 #define  CTRL0_BCLK_O_INV               BIT(6)
  30 #define  CTRL0_BCLK_SEL                 GENMASK(5, 4)
  31 #define  CTRL0_MCLK_SEL                 GENMASK(2, 0)
  32
  33 #define TOACODEC_OUT_CHMAX              2
  34
  35 static const char * const g12a_toacodec_mux_texts[] = {
  36         "I2S A", "I2S B", "I2S C",
  37 };
  38
  39 static int g12a_toacodec_mux_put_enum(struct snd_kcontrol *kcontrol,
  40                                       struct snd_ctl_elem_value *ucontrol)
  41 {
  42         struct snd_soc_component *component =
  43                 snd_soc_dapm_kcontrol_component(kcontrol);
  44         struct snd_soc_dapm_context *dapm =
  45                 snd_soc_dapm_kcontrol_dapm(kcontrol);
  46         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
  47         unsigned int mux, changed;
  48
  49         mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
  50         changed = snd_soc_component_test_bits(component, e->reg,
  51                                               CTRL0_DAT_SEL,
  52                                               FIELD_PREP(CTRL0_DAT_SEL, mux));
  53
  54         if (!changed)
  55                 return 0;
  56
  57         /* Force disconnect of the mux while updating */
  58         snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
  59
  60         snd_soc_component_update_bits(component, e->reg,
  61                                       CTRL0_DAT_SEL |
  62                                       CTRL0_LRCLK_SEL |
  63                                       CTRL0_BCLK_SEL,
  64                                       FIELD_PREP(CTRL0_DAT_SEL, mux) |
  65                                       FIELD_PREP(CTRL0_LRCLK_SEL, mux) |
  66                                       FIELD_PREP(CTRL0_BCLK_SEL, mux));
  67
  68         /*
  69          * FIXME:
  70          * On this soc, the glue gets the MCLK directly from the clock
  71          * controller instead of going the through the TDM interface.
  72          *
  73          * Here we assume interface A uses clock A, etc ... While it is
  74          * true for now, it could be different. Instead the glue should
  75          * find out the clock used by the interface and select the same
  76          * source. For that, we will need regmap backed clock mux which
  77          * is a work in progress
  78          */
  79         snd_soc_component_update_bits(component, e->reg,
  80                                       CTRL0_MCLK_SEL,
  81                                       FIELD_PREP(CTRL0_MCLK_SEL, mux));
  82
  83         snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
  84
  85         return 0;
  86 }
  87
  88 static SOC_ENUM_SINGLE_DECL(g12a_toacodec_mux_enum, TOACODEC_CTRL0,
  89                             CTRL0_DAT_SEL_SHIFT,
  90                             g12a_toacodec_mux_texts);
  91
  92 static const struct snd_kcontrol_new g12a_toacodec_mux =
  93         SOC_DAPM_ENUM_EXT("Source", g12a_toacodec_mux_enum,
  94                           snd_soc_dapm_get_enum_double,
  95                           g12a_toacodec_mux_put_enum);
  96
  97 static const struct snd_kcontrol_new g12a_toacodec_out_enable =
  98         SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOACODEC_CTRL0,
  99                                     CTRL0_ENABLE_SHIFT, 1, 0);
 100
 101 static const struct snd_soc_dapm_widget g12a_toacodec_widgets[] = {
 102         SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
 103                          &g12a_toacodec_mux),
 104         SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
 105                             &g12a_toacodec_out_enable),
 106 };
 107
 108 static int g12a_toacodec_input_hw_params(struct snd_pcm_substream *substream,
 109                                          struct snd_pcm_hw_params *params,
 110                                          struct snd_soc_dai *dai)
 111 {
 112         struct meson_codec_glue_input *data;
 113         int ret;
 114
 115         ret = meson_codec_glue_input_hw_params(substream, params, dai);
 116         if (ret)
 117                 return ret;
 118
 119         /* The glue will provide 1 lane out of the 4 to the output */
 120         data = meson_codec_glue_input_get_data(dai);
 121         data->params.channels_min = min_t(unsigned int, TOACODEC_OUT_CHMAX,
 122                                         data->params.channels_min);
 123         data->params.channels_max = min_t(unsigned int, TOACODEC_OUT_CHMAX,
 124                                         data->params.channels_max);
 125
 126         return 0;
 127 }
 128
 129 static const struct snd_soc_dai_ops g12a_toacodec_input_ops = {
 130         .hw_params      = g12a_toacodec_input_hw_params,
 131         .set_fmt        = meson_codec_glue_input_set_fmt,
 132 };
 133
 134 static const struct snd_soc_dai_ops g12a_toacodec_output_ops = {
 135         .startup        = meson_codec_glue_output_startup,
 136 };
 137
 138 #define TOACODEC_STREAM(xname, xsuffix, xchmax)                 \
 139 {                                                               \
 140         .stream_name    = xname " " xsuffix,                    \
 141         .channels_min   = 1,                                    \
 142         .channels_max   = (xchmax),                             \
 143         .rate_min       = 5512,                                 \
 144         .rate_max       = 192000,                               \
 145         .formats        = AXG_TDM_FORMATS,                      \
 146 }
 147
 148 #define TOACODEC_INPUT(xname, xid) {                                    \
 149         .name = xname,                                                  \
 150         .id = (xid),                                                    \
 151         .playback = TOACODEC_STREAM(xname, "Playback", 8),              \
 152         .ops = &g12a_toacodec_input_ops,                                \
 153         .probe = meson_codec_glue_input_dai_probe,                      \
 154         .remove = meson_codec_glue_input_dai_remove,                    \
 155 }
 156
 157 #define TOACODEC_OUTPUT(xname, xid) {                                   \
 158         .name = xname,                                                  \
 159         .id = (xid),                                                    \
 160         .capture = TOACODEC_STREAM(xname, "Capture", TOACODEC_OUT_CHMAX), \
 161         .ops = &g12a_toacodec_output_ops,                               \
 162 }
 163
 164 static struct snd_soc_dai_driver g12a_toacodec_dai_drv[] = {
 165         TOACODEC_INPUT("IN A", TOACODEC_IN_A),
 166         TOACODEC_INPUT("IN B", TOACODEC_IN_B),
 167         TOACODEC_INPUT("IN C", TOACODEC_IN_C),
 168         TOACODEC_OUTPUT("OUT", TOACODEC_OUT),
 169 };
 170
 171 static int g12a_toacodec_component_probe(struct snd_soc_component *c)
 172 {
 173         /* Initialize the static clock parameters */
 174         return snd_soc_component_write(c, TOACODEC_CTRL0,
 175                                        CTRL0_BLK_CAP_INV);
 176 }
 177
 178 static const struct snd_soc_dapm_route g12a_toacodec_routes[] = {
 179         { "SRC", "I2S A", "IN A Playback" },
 180         { "SRC", "I2S B", "IN B Playback" },
 181         { "SRC", "I2S C", "IN C Playback" },
 182         { "OUT EN", "Switch", "SRC" },
 183         { "OUT Capture", NULL, "OUT EN" },
 184 };
 185
 186 static const struct snd_kcontrol_new g12a_toacodec_controls[] = {
 187         SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL, 3, 0),
 188 };
 189
 190 static const struct snd_soc_component_driver g12a_toacodec_component_drv = {
 191         .probe                  = g12a_toacodec_component_probe,
 192         .controls               = g12a_toacodec_controls,
 193         .num_controls           = ARRAY_SIZE(g12a_toacodec_controls),
 194         .dapm_widgets           = g12a_toacodec_widgets,
 195         .num_dapm_widgets       = ARRAY_SIZE(g12a_toacodec_widgets),
 196         .dapm_routes            = g12a_toacodec_routes,
 197         .num_dapm_routes        = ARRAY_SIZE(g12a_toacodec_routes),
 198         .endianness             = 1,
 199         .non_legacy_dai_naming  = 1,
 200 };
 201
 202 static const struct regmap_config g12a_toacodec_regmap_cfg = {
 203         .reg_bits       = 32,
 204         .val_bits       = 32,
 205         .reg_stride     = 4,
 206 };
 207
 208 static const struct of_device_id g12a_toacodec_of_match[] = {
 209         { .compatible = "amlogic,g12a-toacodec", },
 210         {}
 211 };
 212 MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match);
 213
 214 static int g12a_toacodec_probe(struct platform_device *pdev)
 215 {
 216         struct device *dev = &pdev->dev;
 217         void __iomem *regs;
 218         struct regmap *map;
 219         int ret;
 220
 221         ret = device_reset(dev);
 222         if (ret)
 223                 return ret;
 224
 225         regs = devm_platform_ioremap_resource(pdev, 0);
 226         if (IS_ERR(regs))
 227                 return PTR_ERR(regs);
 228
 229         map = devm_regmap_init_mmio(dev, regs, &g12a_toacodec_regmap_cfg);
 230         if (IS_ERR(map)) {
 231                 dev_err(dev, "failed to init regmap: %ld\n",
 232                         PTR_ERR(map));
 233                 return PTR_ERR(map);
 234         }
 235
 236         return devm_snd_soc_register_component(dev,
 237                         &g12a_toacodec_component_drv, g12a_toacodec_dai_drv,
 238                         ARRAY_SIZE(g12a_toacodec_dai_drv));
 239 }
 240
 241 static struct platform_driver g12a_toacodec_pdrv = {
 242         .driver = {
 243                 .name = G12A_TOACODEC_DRV_NAME,
 244                 .of_match_table = g12a_toacodec_of_match,
 245         },
 246         .probe = g12a_toacodec_probe,
 247 };
 248 module_platform_driver(g12a_toacodec_pdrv);
 249
 250 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 251 MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver");
 252 MODULE_LICENSE("GPL v2");