sound/soc/meson/axg-toddr.c

   1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
   2 //
   3 // Copyright (c) 2018 BayLibre, SAS.
   4 // Author: Jerome Brunet <jbrunet@baylibre.com>
   5
   6 /* This driver implements the frontend capture DAI of AXG based SoCs */
   7
   8 #include <linux/clk.h>
   9 #include <linux/regmap.h>
  10 #include <linux/module.h>
  11 #include <linux/of_platform.h>
  12 #include <sound/pcm_params.h>
  13 #include <sound/soc.h>
  14 #include <sound/soc-dai.h>
  15
  16 #include "axg-fifo.h"
  17
  18 #define CTRL0_TODDR_SEL_RESAMPLE        BIT(30)
  19 #define CTRL0_TODDR_EXT_SIGNED          BIT(29)
  20 #define CTRL0_TODDR_PP_MODE             BIT(28)
  21 #define CTRL0_TODDR_TYPE_MASK           GENMASK(15, 13)
  22 #define CTRL0_TODDR_TYPE(x)             ((x) << 13)
  23 #define CTRL0_TODDR_MSB_POS_MASK        GENMASK(12, 8)
  24 #define CTRL0_TODDR_MSB_POS(x)          ((x) << 8)
  25 #define CTRL0_TODDR_LSB_POS_MASK        GENMASK(7, 3)
  26 #define CTRL0_TODDR_LSB_POS(x)          ((x) << 3)
  27
  28 #define TODDR_MSB_POS   31
  29
  30 static int axg_toddr_pcm_new(struct snd_soc_pcm_runtime *rtd,
  31                              struct snd_soc_dai *dai)
  32 {
  33         return axg_fifo_pcm_new(rtd, SNDRV_PCM_STREAM_CAPTURE);
  34 }
  35
  36 static int axg_toddr_dai_hw_params(struct snd_pcm_substream *substream,
  37                                    struct snd_pcm_hw_params *params,
  38                                    struct snd_soc_dai *dai)
  39 {
  40         struct axg_fifo *fifo = snd_soc_dai_get_drvdata(dai);
  41         unsigned int type, width;
  42
  43         switch (params_physical_width(params)) {
  44         case 8:
  45                 type = 0; /* 8 samples of 8 bits */
  46                 break;
  47         case 16:
  48                 type = 2; /* 4 samples of 16 bits - right justified */
  49                 break;
  50         case 32:
  51                 type = 4; /* 2 samples of 32 bits - right justified */
  52                 break;
  53         default:
  54                 return -EINVAL;
  55         }
  56
  57         width = params_width(params);
  58
  59         regmap_update_bits(fifo->map, FIFO_CTRL0,
  60                            CTRL0_TODDR_TYPE_MASK |
  61                            CTRL0_TODDR_MSB_POS_MASK |
  62                            CTRL0_TODDR_LSB_POS_MASK,
  63                            CTRL0_TODDR_TYPE(type) |
  64                            CTRL0_TODDR_MSB_POS(TODDR_MSB_POS) |
  65                            CTRL0_TODDR_LSB_POS(TODDR_MSB_POS - (width - 1)));
  66
  67         return 0;
  68 }
  69
  70 static int axg_toddr_dai_startup(struct snd_pcm_substream *substream,
  71                                  struct snd_soc_dai *dai)
  72 {
  73         struct axg_fifo *fifo = snd_soc_dai_get_drvdata(dai);
  74         unsigned int fifo_threshold;
  75         int ret;
  76
  77         /* Enable pclk to access registers and clock the fifo ip */
  78         ret = clk_prepare_enable(fifo->pclk);
  79         if (ret)
  80                 return ret;
  81
  82         /* Select orginal data - resampling not supported ATM */
  83         regmap_update_bits(fifo->map, FIFO_CTRL0, CTRL0_TODDR_SEL_RESAMPLE, 0);
  84
  85         /* Only signed format are supported ATM */
  86         regmap_update_bits(fifo->map, FIFO_CTRL0, CTRL0_TODDR_EXT_SIGNED,
  87                            CTRL0_TODDR_EXT_SIGNED);
  88
  89         /* Apply single buffer mode to the interface */
  90         regmap_update_bits(fifo->map, FIFO_CTRL0, CTRL0_TODDR_PP_MODE, 0);
  91
  92         /* TODDR does not have a configurable fifo depth */
  93         fifo_threshold = AXG_FIFO_MIN_CNT - 1;
  94         regmap_update_bits(fifo->map, FIFO_CTRL1, CTRL1_THRESHOLD_MASK,
  95                            CTRL1_THRESHOLD(fifo_threshold));
  96
  97         return 0;
  98 }
  99
 100 static void axg_toddr_dai_shutdown(struct snd_pcm_substream *substream,
 101                                    struct snd_soc_dai *dai)
 102 {
 103         struct axg_fifo *fifo = snd_soc_dai_get_drvdata(dai);
 104
 105         clk_disable_unprepare(fifo->pclk);
 106 }
 107
 108 static const struct snd_soc_dai_ops axg_toddr_ops = {
 109         .hw_params      = axg_toddr_dai_hw_params,
 110         .startup        = axg_toddr_dai_startup,
 111         .shutdown       = axg_toddr_dai_shutdown,
 112 };
 113
 114 static struct snd_soc_dai_driver axg_toddr_dai_drv = {
 115         .name = "TODDR",
 116         .capture = {
 117                 .stream_name    = "Capture",
 118                 .channels_min   = 1,
 119                 .channels_max   = AXG_FIFO_CH_MAX,
 120                 .rates          = AXG_FIFO_RATES,
 121                 .formats        = AXG_FIFO_FORMATS,
 122         },
 123         .ops            = &axg_toddr_ops,
 124         .pcm_new        = axg_toddr_pcm_new,
 125 };
 126
 127 static const char * const axg_toddr_sel_texts[] = {
 128         "IN 0", "IN 1", "IN 2", "IN 3", "IN 4", "IN 6"
 129 };
 130
 131 static const unsigned int axg_toddr_sel_values[] = {
 132         0, 1, 2, 3, 4, 6
 133 };
 134
 135 static SOC_VALUE_ENUM_SINGLE_DECL(axg_toddr_sel_enum, FIFO_CTRL0,
 136                                   CTRL0_SEL_SHIFT, CTRL0_SEL_MASK,
 137                                   axg_toddr_sel_texts, axg_toddr_sel_values);
 138
 139 static const struct snd_kcontrol_new axg_toddr_in_mux =
 140         SOC_DAPM_ENUM("Input Source", axg_toddr_sel_enum);
 141
 142 static const struct snd_soc_dapm_widget axg_toddr_dapm_widgets[] = {
 143         SND_SOC_DAPM_MUX("SRC SEL", SND_SOC_NOPM, 0, 0, &axg_toddr_in_mux),
 144         SND_SOC_DAPM_AIF_IN("IN 0", NULL, 0, SND_SOC_NOPM, 0, 0),
 145         SND_SOC_DAPM_AIF_IN("IN 1", NULL, 0, SND_SOC_NOPM, 0, 0),
 146         SND_SOC_DAPM_AIF_IN("IN 2", NULL, 0, SND_SOC_NOPM, 0, 0),
 147         SND_SOC_DAPM_AIF_IN("IN 3", NULL, 0, SND_SOC_NOPM, 0, 0),
 148         SND_SOC_DAPM_AIF_IN("IN 4", NULL, 0, SND_SOC_NOPM, 0, 0),
 149         SND_SOC_DAPM_AIF_IN("IN 6", NULL, 0, SND_SOC_NOPM, 0, 0),
 150 };
 151
 152 static const struct snd_soc_dapm_route axg_toddr_dapm_routes[] = {
 153         { "Capture", NULL, "SRC SEL" },
 154         { "SRC SEL", "IN 0", "IN 0" },
 155         { "SRC SEL", "IN 1", "IN 1" },
 156         { "SRC SEL", "IN 2", "IN 2" },
 157         { "SRC SEL", "IN 3", "IN 3" },
 158         { "SRC SEL", "IN 4", "IN 4" },
 159         { "SRC SEL", "IN 6", "IN 6" },
 160 };
 161
 162 static const struct snd_soc_component_driver axg_toddr_component_drv = {
 163         .dapm_widgets           = axg_toddr_dapm_widgets,
 164         .num_dapm_widgets       = ARRAY_SIZE(axg_toddr_dapm_widgets),
 165         .dapm_routes            = axg_toddr_dapm_routes,
 166         .num_dapm_routes        = ARRAY_SIZE(axg_toddr_dapm_routes),
 167         .ops                    = &axg_fifo_pcm_ops
 168 };
 169
 170 static const struct axg_fifo_match_data axg_toddr_match_data = {
 171         .component_drv  = &axg_toddr_component_drv,
 172         .dai_drv        = &axg_toddr_dai_drv
 173 };
 174
 175 static const struct of_device_id axg_toddr_of_match[] = {
 176         {
 177                 .compatible = "amlogic,axg-toddr",
 178                 .data = &axg_toddr_match_data,
 179         }, {}
 180 };
 181 MODULE_DEVICE_TABLE(of, axg_toddr_of_match);
 182
 183 static struct platform_driver axg_toddr_pdrv = {
 184         .probe = axg_fifo_probe,
 185         .driver = {
 186                 .name = "axg-toddr",
 187                 .of_match_table = axg_toddr_of_match,
 188         },
 189 };
 190 module_platform_driver(axg_toddr_pdrv);
 191
 192 MODULE_DESCRIPTION("Amlogic AXG capture fifo driver");
 193 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 194 MODULE_LICENSE("GPL v2");