sound/soc/meson/axg-tdmin.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 #include <linux/module.h>
   7 #include <linux/of_platform.h>
   8 #include <linux/regmap.h>
   9 #include <sound/soc.h>
  10 #include <sound/soc-dai.h>
  11
  12 #include "axg-tdm-formatter.h"
  13
  14 #define TDMIN_CTRL                      0x00
  15 #define  TDMIN_CTRL_ENABLE              BIT(31)
  16 #define  TDMIN_CTRL_I2S_MODE            BIT(30)
  17 #define  TDMIN_CTRL_RST_OUT             BIT(29)
  18 #define  TDMIN_CTRL_RST_IN              BIT(28)
  19 #define  TDMIN_CTRL_WS_INV              BIT(25)
  20 #define  TDMIN_CTRL_SEL_SHIFT           20
  21 #define  TDMIN_CTRL_IN_BIT_SKEW_MASK    GENMASK(18, 16)
  22 #define  TDMIN_CTRL_IN_BIT_SKEW(x)      ((x) << 16)
  23 #define  TDMIN_CTRL_LSB_FIRST           BIT(5)
  24 #define  TDMIN_CTRL_BITNUM_MASK GENMASK(4, 0)
  25 #define  TDMIN_CTRL_BITNUM(x)           ((x) << 0)
  26 #define TDMIN_SWAP                      0x04
  27 #define TDMIN_MASK0                     0x08
  28 #define TDMIN_MASK1                     0x0c
  29 #define TDMIN_MASK2                     0x10
  30 #define TDMIN_MASK3                     0x14
  31 #define TDMIN_STAT                      0x18
  32 #define TDMIN_MUTE_VAL                  0x1c
  33 #define TDMIN_MUTE0                     0x20
  34 #define TDMIN_MUTE1                     0x24
  35 #define TDMIN_MUTE2                     0x28
  36 #define TDMIN_MUTE3                     0x2c
  37
  38 static const struct regmap_config axg_tdmin_regmap_cfg = {
  39         .reg_bits       = 32,
  40         .val_bits       = 32,
  41         .reg_stride     = 4,
  42         .max_register   = TDMIN_MUTE3,
  43 };
  44
  45 static const char * const axg_tdmin_sel_texts[] = {
  46         "IN 0", "IN 1", "IN 2",  "IN 3",  "IN 4",  "IN 5",  "IN 6",  "IN 7",
  47         "IN 8", "IN 9", "IN 10", "IN 11", "IN 12", "IN 13", "IN 14", "IN 15",
  48 };
  49
  50 /* Change to special mux control to reset dapm */
  51 static SOC_ENUM_SINGLE_DECL(axg_tdmin_sel_enum, TDMIN_CTRL,
  52                             TDMIN_CTRL_SEL_SHIFT, axg_tdmin_sel_texts);
  53
  54 static const struct snd_kcontrol_new axg_tdmin_in_mux =
  55         SOC_DAPM_ENUM("Input Source", axg_tdmin_sel_enum);
  56
  57 static struct snd_soc_dai *
  58 axg_tdmin_get_be(struct snd_soc_dapm_widget *w)
  59 {
  60         struct snd_soc_dapm_path *p = NULL;
  61         struct snd_soc_dai *be;
  62
  63         snd_soc_dapm_widget_for_each_source_path(w, p) {
  64                 if (!p->connect)
  65                         continue;
  66
  67                 if (p->source->id == snd_soc_dapm_dai_out)
  68                         return (struct snd_soc_dai *)p->source->priv;
  69
  70                 be = axg_tdmin_get_be(p->source);
  71                 if (be)
  72                         return be;
  73         }
  74
  75         return NULL;
  76 }
  77
  78 static struct axg_tdm_stream *
  79 axg_tdmin_get_tdm_stream(struct snd_soc_dapm_widget *w)
  80 {
  81         struct snd_soc_dai *be = axg_tdmin_get_be(w);
  82
  83         if (!be)
  84                 return NULL;
  85
  86         return be->capture_dma_data;
  87 }
  88
  89 static void axg_tdmin_enable(struct regmap *map)
  90 {
  91         /* Apply both reset */
  92         regmap_update_bits(map, TDMIN_CTRL,
  93                            TDMIN_CTRL_RST_OUT | TDMIN_CTRL_RST_IN, 0);
  94
  95         /* Clear out reset before in reset */
  96         regmap_update_bits(map, TDMIN_CTRL,
  97                            TDMIN_CTRL_RST_OUT, TDMIN_CTRL_RST_OUT);
  98         regmap_update_bits(map, TDMIN_CTRL,
  99                            TDMIN_CTRL_RST_IN,  TDMIN_CTRL_RST_IN);
 100
 101         /* Actually enable tdmin */
 102         regmap_update_bits(map, TDMIN_CTRL,
 103                            TDMIN_CTRL_ENABLE, TDMIN_CTRL_ENABLE);
 104 }
 105
 106 static void axg_tdmin_disable(struct regmap *map)
 107 {
 108         regmap_update_bits(map, TDMIN_CTRL, TDMIN_CTRL_ENABLE, 0);
 109 }
 110
 111 static int axg_tdmin_prepare(struct regmap *map,
 112                              const struct axg_tdm_formatter_hw *quirks,
 113                              struct axg_tdm_stream *ts)
 114 {
 115         unsigned int val, skew = quirks->skew_offset;
 116
 117         /* Set stream skew */
 118         switch (ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 119         case SND_SOC_DAIFMT_I2S:
 120         case SND_SOC_DAIFMT_DSP_A:
 121                 skew += 1;
 122                 break;
 123
 124         case SND_SOC_DAIFMT_LEFT_J:
 125         case SND_SOC_DAIFMT_DSP_B:
 126                 break;
 127
 128         default:
 129                 pr_err("Unsupported format: %u\n",
 130                        ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK);
 131                 return -EINVAL;
 132         }
 133
 134         val = TDMIN_CTRL_IN_BIT_SKEW(skew);
 135
 136         /* Set stream format mode */
 137         switch (ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 138         case SND_SOC_DAIFMT_I2S:
 139         case SND_SOC_DAIFMT_LEFT_J:
 140         case SND_SOC_DAIFMT_RIGHT_J:
 141                 val |= TDMIN_CTRL_I2S_MODE;
 142                 break;
 143         }
 144
 145         /* If the sample clock is inverted, invert it back for the formatter */
 146         if (axg_tdm_lrclk_invert(ts->iface->fmt))
 147                 val |= TDMIN_CTRL_WS_INV;
 148
 149         /* Set the slot width */
 150         val |= TDMIN_CTRL_BITNUM(ts->iface->slot_width - 1);
 151
 152         /*
 153          * The following also reset LSB_FIRST which result in the formatter
 154          * placing the first bit received at bit 31
 155          */
 156         regmap_update_bits(map, TDMIN_CTRL,
 157                            (TDMIN_CTRL_IN_BIT_SKEW_MASK | TDMIN_CTRL_WS_INV |
 158                             TDMIN_CTRL_I2S_MODE | TDMIN_CTRL_LSB_FIRST |
 159                             TDMIN_CTRL_BITNUM_MASK), val);
 160
 161         /* Set static swap mask configuration */
 162         regmap_write(map, TDMIN_SWAP, 0x76543210);
 163
 164         return axg_tdm_formatter_set_channel_masks(map, ts, TDMIN_MASK0);
 165 }
 166
 167 static const struct snd_soc_dapm_widget axg_tdmin_dapm_widgets[] = {
 168         SND_SOC_DAPM_AIF_IN("IN 0",  NULL, 0, SND_SOC_NOPM, 0, 0),
 169         SND_SOC_DAPM_AIF_IN("IN 1",  NULL, 0, SND_SOC_NOPM, 0, 0),
 170         SND_SOC_DAPM_AIF_IN("IN 2",  NULL, 0, SND_SOC_NOPM, 0, 0),
 171         SND_SOC_DAPM_AIF_IN("IN 3",  NULL, 0, SND_SOC_NOPM, 0, 0),
 172         SND_SOC_DAPM_AIF_IN("IN 4",  NULL, 0, SND_SOC_NOPM, 0, 0),
 173         SND_SOC_DAPM_AIF_IN("IN 5",  NULL, 0, SND_SOC_NOPM, 0, 0),
 174         SND_SOC_DAPM_AIF_IN("IN 6",  NULL, 0, SND_SOC_NOPM, 0, 0),
 175         SND_SOC_DAPM_AIF_IN("IN 7",  NULL, 0, SND_SOC_NOPM, 0, 0),
 176         SND_SOC_DAPM_AIF_IN("IN 8",  NULL, 0, SND_SOC_NOPM, 0, 0),
 177         SND_SOC_DAPM_AIF_IN("IN 9",  NULL, 0, SND_SOC_NOPM, 0, 0),
 178         SND_SOC_DAPM_AIF_IN("IN 10", NULL, 0, SND_SOC_NOPM, 0, 0),
 179         SND_SOC_DAPM_AIF_IN("IN 11", NULL, 0, SND_SOC_NOPM, 0, 0),
 180         SND_SOC_DAPM_AIF_IN("IN 12", NULL, 0, SND_SOC_NOPM, 0, 0),
 181         SND_SOC_DAPM_AIF_IN("IN 13", NULL, 0, SND_SOC_NOPM, 0, 0),
 182         SND_SOC_DAPM_AIF_IN("IN 14", NULL, 0, SND_SOC_NOPM, 0, 0),
 183         SND_SOC_DAPM_AIF_IN("IN 15", NULL, 0, SND_SOC_NOPM, 0, 0),
 184         SND_SOC_DAPM_MUX("SRC SEL", SND_SOC_NOPM, 0, 0, &axg_tdmin_in_mux),
 185         SND_SOC_DAPM_PGA_E("DEC", SND_SOC_NOPM, 0, 0, NULL, 0,
 186                            axg_tdm_formatter_event,
 187                            (SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_PRE_PMD)),
 188         SND_SOC_DAPM_AIF_OUT("OUT", NULL, 0, SND_SOC_NOPM, 0, 0),
 189 };
 190
 191 static const struct snd_soc_dapm_route axg_tdmin_dapm_routes[] = {
 192         { "SRC SEL", "IN 0",  "IN 0" },
 193         { "SRC SEL", "IN 1",  "IN 1" },
 194         { "SRC SEL", "IN 2",  "IN 2" },
 195         { "SRC SEL", "IN 3",  "IN 3" },
 196         { "SRC SEL", "IN 4",  "IN 4" },
 197         { "SRC SEL", "IN 5",  "IN 5" },
 198         { "SRC SEL", "IN 6",  "IN 6" },
 199         { "SRC SEL", "IN 7",  "IN 7" },
 200         { "SRC SEL", "IN 8",  "IN 8" },
 201         { "SRC SEL", "IN 9",  "IN 9" },
 202         { "SRC SEL", "IN 10", "IN 10" },
 203         { "SRC SEL", "IN 11", "IN 11" },
 204         { "SRC SEL", "IN 12", "IN 12" },
 205         { "SRC SEL", "IN 13", "IN 13" },
 206         { "SRC SEL", "IN 14", "IN 14" },
 207         { "SRC SEL", "IN 15", "IN 15" },
 208         { "DEC", NULL, "SRC SEL" },
 209         { "OUT", NULL, "DEC" },
 210 };
 211
 212 static const struct snd_soc_component_driver axg_tdmin_component_drv = {
 213         .dapm_widgets           = axg_tdmin_dapm_widgets,
 214         .num_dapm_widgets       = ARRAY_SIZE(axg_tdmin_dapm_widgets),
 215         .dapm_routes            = axg_tdmin_dapm_routes,
 216         .num_dapm_routes        = ARRAY_SIZE(axg_tdmin_dapm_routes),
 217 };
 218
 219 static const struct axg_tdm_formatter_ops axg_tdmin_ops = {
 220         .get_stream     = axg_tdmin_get_tdm_stream,
 221         .prepare        = axg_tdmin_prepare,
 222         .enable         = axg_tdmin_enable,
 223         .disable        = axg_tdmin_disable,
 224 };
 225
 226 static const struct axg_tdm_formatter_driver axg_tdmin_drv = {
 227         .component_drv  = &axg_tdmin_component_drv,
 228         .regmap_cfg     = &axg_tdmin_regmap_cfg,
 229         .ops            = &axg_tdmin_ops,
 230         .quirks         = &(const struct axg_tdm_formatter_hw) {
 231                 .invert_sclk    = false,
 232                 .skew_offset    = 2,
 233         },
 234 };
 235
 236 static const struct of_device_id axg_tdmin_of_match[] = {
 237         {
 238                 .compatible = "amlogic,axg-tdmin",
 239                 .data = &axg_tdmin_drv,
 240         }, {}
 241 };
 242 MODULE_DEVICE_TABLE(of, axg_tdmin_of_match);
 243
 244 static struct platform_driver axg_tdmin_pdrv = {
 245         .probe = axg_tdm_formatter_probe,
 246         .driver = {
 247                 .name = "axg-tdmin",
 248                 .of_match_table = axg_tdmin_of_match,
 249         },
 250 };
 251 module_platform_driver(axg_tdmin_pdrv);
 252
 253 MODULE_DESCRIPTION("Amlogic AXG TDM input formatter driver");
 254 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 255 MODULE_LICENSE("GPL v2");