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