sound/soc/meson/t9015.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/clk.h>
   7 #include <linux/delay.h>
   8 #include <linux/module.h>
   9 #include <linux/regmap.h>
  10 #include <linux/regulator/consumer.h>
  11 #include <linux/reset.h>
  12 #include <sound/soc.h>
  13 #include <sound/tlv.h>
  14
  15 #define BLOCK_EN        0x00
  16 #define  LORN_EN        0
  17 #define  LORP_EN        1
  18 #define  LOLN_EN        2
  19 #define  LOLP_EN        3
  20 #define  DACR_EN        4
  21 #define  DACL_EN        5
  22 #define  DACR_INV       20
  23 #define  DACL_INV       21
  24 #define  DACR_SRC       22
  25 #define  DACL_SRC       23
  26 #define  REFP_BUF_EN    BIT(12)
  27 #define  BIAS_CURRENT_EN BIT(13)
  28 #define  VMID_GEN_FAST  BIT(14)
  29 #define  VMID_GEN_EN    BIT(15)
  30 #define  I2S_MODE       BIT(30)
  31 #define VOL_CTRL0       0x04
  32 #define  GAIN_H         31
  33 #define  GAIN_L         23
  34 #define VOL_CTRL1       0x08
  35 #define  DAC_MONO       8
  36 #define  RAMP_RATE      10
  37 #define  VC_RAMP_MODE   12
  38 #define  MUTE_MODE      13
  39 #define  UNMUTE_MODE    14
  40 #define  DAC_SOFT_MUTE  15
  41 #define  DACR_VC        16
  42 #define  DACL_VC        24
  43 #define LINEOUT_CFG     0x0c
  44 #define  LORN_POL       0
  45 #define  LORP_POL       4
  46 #define  LOLN_POL       8
  47 #define  LOLP_POL       12
  48 #define POWER_CFG       0x10
  49
  50 struct t9015 {
  51         struct clk *pclk;
  52         struct regulator *avdd;
  53 };
  54
  55 static int t9015_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
  56 {
  57         struct snd_soc_component *component = dai->component;
  58         unsigned int val;
  59
  60         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
  61         case SND_SOC_DAIFMT_CBM_CFM:
  62                 val = I2S_MODE;
  63                 break;
  64
  65         case SND_SOC_DAIFMT_CBS_CFS:
  66                 val = 0;
  67                 break;
  68
  69         default:
  70                 return -EINVAL;
  71         }
  72
  73         snd_soc_component_update_bits(component, BLOCK_EN, I2S_MODE, val);
  74
  75         if (((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_I2S) &&
  76             ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_LEFT_J))
  77                 return -EINVAL;
  78
  79         return 0;
  80 }
  81
  82 static const struct snd_soc_dai_ops t9015_dai_ops = {
  83         .set_fmt = t9015_dai_set_fmt,
  84 };
  85
  86 static struct snd_soc_dai_driver t9015_dai = {
  87         .name = "t9015-hifi",
  88         .playback = {
  89                 .stream_name = "Playback",
  90                 .channels_min = 1,
  91                 .channels_max = 2,
  92                 .rates = SNDRV_PCM_RATE_8000_96000,
  93                 .formats = (SNDRV_PCM_FMTBIT_S8 |
  94                             SNDRV_PCM_FMTBIT_S16_LE |
  95                             SNDRV_PCM_FMTBIT_S20_LE |
  96                             SNDRV_PCM_FMTBIT_S24_LE),
  97         },
  98         .ops = &t9015_dai_ops,
  99 };
 100
 101 static const DECLARE_TLV_DB_MINMAX_MUTE(dac_vol_tlv, -9525, 0);
 102
 103 static const char * const ramp_rate_txt[] = { "Fast", "Slow" };
 104 static SOC_ENUM_SINGLE_DECL(ramp_rate_enum, VOL_CTRL1, RAMP_RATE,
 105                             ramp_rate_txt);
 106
 107 static const char * const dacr_in_txt[] = { "Right", "Left" };
 108 static SOC_ENUM_SINGLE_DECL(dacr_in_enum, BLOCK_EN, DACR_SRC, dacr_in_txt);
 109
 110 static const char * const dacl_in_txt[] = { "Left", "Right" };
 111 static SOC_ENUM_SINGLE_DECL(dacl_in_enum, BLOCK_EN, DACL_SRC, dacl_in_txt);
 112
 113 static const char * const mono_txt[] = { "Stereo", "Mono"};
 114 static SOC_ENUM_SINGLE_DECL(mono_enum, VOL_CTRL1, DAC_MONO, mono_txt);
 115
 116 static const struct snd_kcontrol_new t9015_snd_controls[] = {
 117         /* Volume Controls */
 118         SOC_ENUM("Playback Channel Mode", mono_enum),
 119         SOC_SINGLE("Playback Switch", VOL_CTRL1, DAC_SOFT_MUTE, 1, 1),
 120         SOC_DOUBLE_TLV("Playback Volume", VOL_CTRL1, DACL_VC, DACR_VC,
 121                        0xff, 0, dac_vol_tlv),
 122
 123         /* Ramp Controls */
 124         SOC_ENUM("Ramp Rate", ramp_rate_enum),
 125         SOC_SINGLE("Volume Ramp Switch", VOL_CTRL1, VC_RAMP_MODE, 1, 0),
 126         SOC_SINGLE("Mute Ramp Switch", VOL_CTRL1, MUTE_MODE, 1, 0),
 127         SOC_SINGLE("Unmute Ramp Switch", VOL_CTRL1, UNMUTE_MODE, 1, 0),
 128 };
 129
 130 static const struct snd_kcontrol_new t9015_right_dac_mux =
 131         SOC_DAPM_ENUM("Right DAC Source", dacr_in_enum);
 132 static const struct snd_kcontrol_new t9015_left_dac_mux =
 133         SOC_DAPM_ENUM("Left DAC Source", dacl_in_enum);
 134
 135 static const struct snd_soc_dapm_widget t9015_dapm_widgets[] = {
 136         SND_SOC_DAPM_AIF_IN("Right IN", NULL, 0, SND_SOC_NOPM, 0, 0),
 137         SND_SOC_DAPM_AIF_IN("Left IN", NULL, 0, SND_SOC_NOPM, 0, 0),
 138         SND_SOC_DAPM_MUX("Right DAC Sel", SND_SOC_NOPM, 0, 0,
 139                          &t9015_right_dac_mux),
 140         SND_SOC_DAPM_MUX("Left DAC Sel", SND_SOC_NOPM, 0, 0,
 141                          &t9015_left_dac_mux),
 142         SND_SOC_DAPM_DAC("Right DAC", NULL, BLOCK_EN, DACR_EN, 0),
 143         SND_SOC_DAPM_DAC("Left DAC",  NULL, BLOCK_EN, DACL_EN, 0),
 144         SND_SOC_DAPM_OUT_DRV("Right- Driver", BLOCK_EN, LORN_EN, 0,
 145                          NULL, 0),
 146         SND_SOC_DAPM_OUT_DRV("Right+ Driver", BLOCK_EN, LORP_EN, 0,
 147                          NULL, 0),
 148         SND_SOC_DAPM_OUT_DRV("Left- Driver",  BLOCK_EN, LOLN_EN, 0,
 149                          NULL, 0),
 150         SND_SOC_DAPM_OUT_DRV("Left+ Driver",  BLOCK_EN, LOLP_EN, 0,
 151                          NULL, 0),
 152         SND_SOC_DAPM_OUTPUT("LORN"),
 153         SND_SOC_DAPM_OUTPUT("LORP"),
 154         SND_SOC_DAPM_OUTPUT("LOLN"),
 155         SND_SOC_DAPM_OUTPUT("LOLP"),
 156 };
 157
 158 static const struct snd_soc_dapm_route t9015_dapm_routes[] = {
 159         { "Right IN", NULL, "Playback" },
 160         { "Left IN",  NULL, "Playback" },
 161         { "Right DAC Sel", "Right", "Right IN" },
 162         { "Right DAC Sel", "Left",  "Left IN" },
 163         { "Left DAC Sel",  "Right", "Right IN" },
 164         { "Left DAC Sel",  "Left",  "Left IN" },
 165         { "Right DAC", NULL, "Right DAC Sel" },
 166         { "Left DAC",  NULL, "Left DAC Sel" },
 167         { "Right- Driver", NULL, "Right DAC" },
 168         { "Right+ Driver", NULL, "Right DAC" },
 169         { "Left- Driver",  NULL, "Left DAC"  },
 170         { "Left+ Driver",  NULL, "Left DAC"  },
 171         { "LORN", NULL, "Right- Driver", },
 172         { "LORP", NULL, "Right+ Driver", },
 173         { "LOLN", NULL, "Left- Driver",  },
 174         { "LOLP", NULL, "Left+ Driver",  },
 175 };
 176
 177 static int t9015_set_bias_level(struct snd_soc_component *component,
 178                                 enum snd_soc_bias_level level)
 179 {
 180         struct t9015 *priv = snd_soc_component_get_drvdata(component);
 181         enum snd_soc_bias_level now =
 182                 snd_soc_component_get_bias_level(component);
 183         int ret;
 184
 185         switch (level) {
 186         case SND_SOC_BIAS_ON:
 187                 snd_soc_component_update_bits(component, BLOCK_EN,
 188                                               BIAS_CURRENT_EN,
 189                                               BIAS_CURRENT_EN);
 190                 break;
 191         case SND_SOC_BIAS_PREPARE:
 192                 snd_soc_component_update_bits(component, BLOCK_EN,
 193                                               BIAS_CURRENT_EN,
 194                                               0);
 195                 break;
 196         case SND_SOC_BIAS_STANDBY:
 197                 ret = regulator_enable(priv->avdd);
 198                 if (ret) {
 199                         dev_err(component->dev, "AVDD enable failed\n");
 200                         return ret;
 201                 }
 202
 203                 if (now == SND_SOC_BIAS_OFF) {
 204                         snd_soc_component_update_bits(component, BLOCK_EN,
 205                                 VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN,
 206                                 VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN);
 207
 208                         mdelay(200);
 209                         snd_soc_component_update_bits(component, BLOCK_EN,
 210                                                       VMID_GEN_FAST,
 211                                                       0);
 212                 }
 213
 214                 break;
 215         case SND_SOC_BIAS_OFF:
 216                 snd_soc_component_update_bits(component, BLOCK_EN,
 217                         VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN,
 218                         0);
 219
 220                 regulator_disable(priv->avdd);
 221                 break;
 222         }
 223
 224         return 0;
 225 }
 226
 227 static const struct snd_soc_component_driver t9015_codec_driver = {
 228         .set_bias_level         = t9015_set_bias_level,
 229         .controls               = t9015_snd_controls,
 230         .num_controls           = ARRAY_SIZE(t9015_snd_controls),
 231         .dapm_widgets           = t9015_dapm_widgets,
 232         .num_dapm_widgets       = ARRAY_SIZE(t9015_dapm_widgets),
 233         .dapm_routes            = t9015_dapm_routes,
 234         .num_dapm_routes        = ARRAY_SIZE(t9015_dapm_routes),
 235         .suspend_bias_off       = 1,
 236         .endianness             = 1,
 237         .non_legacy_dai_naming  = 1,
 238 };
 239
 240 static const struct regmap_config t9015_regmap_config = {
 241         .reg_bits               = 32,
 242         .reg_stride             = 4,
 243         .val_bits               = 32,
 244         .max_register           = POWER_CFG,
 245 };
 246
 247 static int t9015_probe(struct platform_device *pdev)
 248 {
 249         struct device *dev = &pdev->dev;
 250         struct t9015 *priv;
 251         void __iomem *regs;
 252         struct regmap *regmap;
 253         int ret;
 254
 255         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 256         if (!priv)
 257                 return -ENOMEM;
 258         platform_set_drvdata(pdev, priv);
 259
 260         priv->pclk = devm_clk_get(dev, "pclk");
 261         if (IS_ERR(priv->pclk)) {
 262                 if (PTR_ERR(priv->pclk) != -EPROBE_DEFER)
 263                         dev_err(dev, "failed to get core clock\n");
 264                 return PTR_ERR(priv->pclk);
 265         }
 266
 267         priv->avdd = devm_regulator_get(dev, "AVDD");
 268         if (IS_ERR(priv->avdd)) {
 269                 if (PTR_ERR(priv->avdd) != -EPROBE_DEFER)
 270                         dev_err(dev, "failed to AVDD\n");
 271                 return PTR_ERR(priv->avdd);
 272         }
 273
 274         ret = clk_prepare_enable(priv->pclk);
 275         if (ret) {
 276                 dev_err(dev, "core clock enable failed\n");
 277                 return ret;
 278         }
 279
 280         ret = devm_add_action_or_reset(dev,
 281                         (void(*)(void *))clk_disable_unprepare,
 282                         priv->pclk);
 283         if (ret)
 284                 return ret;
 285
 286         ret = device_reset(dev);
 287         if (ret) {
 288                 dev_err(dev, "reset failed\n");
 289                 return ret;
 290         }
 291
 292         regs = devm_platform_ioremap_resource(pdev, 0);
 293         if (IS_ERR(regs)) {
 294                 dev_err(dev, "register map failed\n");
 295                 return PTR_ERR(regs);
 296         }
 297
 298         regmap = devm_regmap_init_mmio(dev, regs, &t9015_regmap_config);
 299         if (IS_ERR(regmap)) {
 300                 dev_err(dev, "regmap init failed\n");
 301                 return PTR_ERR(regmap);
 302         }
 303
 304         /*
 305          * Initialize output polarity:
 306          * ATM the output polarity is fixed but in the future it might useful
 307          * to add DT property to set this depending on the platform needs
 308          */
 309         regmap_write(regmap, LINEOUT_CFG, 0x1111);
 310
 311         return devm_snd_soc_register_component(dev, &t9015_codec_driver,
 312                                                &t9015_dai, 1);
 313 }
 314
 315 static const struct of_device_id t9015_ids[] __maybe_unused = {
 316         { .compatible = "amlogic,t9015", },
 317         { }
 318 };
 319 MODULE_DEVICE_TABLE(of, t9015_ids);
 320
 321 static struct platform_driver t9015_driver = {
 322         .driver = {
 323                 .name = "t9015-codec",
 324                 .of_match_table = of_match_ptr(t9015_ids),
 325         },
 326         .probe = t9015_probe,
 327 };
 328
 329 module_platform_driver(t9015_driver);
 330
 331 MODULE_DESCRIPTION("ASoC Amlogic T9015 codec driver");
 332 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 333 MODULE_LICENSE("GPL");