// SPDX-License-Identifier: GPL-2.0-only // SPDX-FileCopyrightText: Copyright (c) 2020-2024 NVIDIA CORPORATION & AFFILIATES. // All rights reserved. // // tegra210_dmic.c - Tegra210 DMIC driver #include #include #include #include #include #include #include #include #include #include #include #include "tegra210_dmic.h" #include "tegra_cif.h" static const struct reg_default tegra210_dmic_reg_defaults[] = { { TEGRA210_DMIC_TX_INT_MASK, 0x00000001 }, { TEGRA210_DMIC_TX_CIF_CTRL, 0x00007700 }, { TEGRA210_DMIC_CG, 0x1 }, { TEGRA210_DMIC_CTRL, 0x00000301 }, /* Below enables all filters - DCR, LP and SC */ { TEGRA210_DMIC_DBG_CTRL, 0xe }, /* Below as per latest POR value */ { TEGRA210_DMIC_DCR_BIQUAD_0_COEF_4, 0x0 }, /* LP filter is configured for pass through and used to apply gain */ { TEGRA210_DMIC_LP_BIQUAD_0_COEF_0, 0x00800000 }, { TEGRA210_DMIC_LP_BIQUAD_0_COEF_1, 0x0 }, { TEGRA210_DMIC_LP_BIQUAD_0_COEF_2, 0x0 }, { TEGRA210_DMIC_LP_BIQUAD_0_COEF_3, 0x0 }, { TEGRA210_DMIC_LP_BIQUAD_0_COEF_4, 0x0 }, { TEGRA210_DMIC_LP_BIQUAD_1_COEF_0, 0x00800000 }, { TEGRA210_DMIC_LP_BIQUAD_1_COEF_1, 0x0 }, { TEGRA210_DMIC_LP_BIQUAD_1_COEF_2, 0x0 }, { TEGRA210_DMIC_LP_BIQUAD_1_COEF_3, 0x0 }, { TEGRA210_DMIC_LP_BIQUAD_1_COEF_4, 0x0 }, }; static int __maybe_unused tegra210_dmic_runtime_suspend(struct device *dev) { struct tegra210_dmic *dmic = dev_get_drvdata(dev); regcache_cache_only(dmic->regmap, true); regcache_mark_dirty(dmic->regmap); clk_disable_unprepare(dmic->clk_dmic); return 0; } static int __maybe_unused tegra210_dmic_runtime_resume(struct device *dev) { struct tegra210_dmic *dmic = dev_get_drvdata(dev); int err; err = clk_prepare_enable(dmic->clk_dmic); if (err) { dev_err(dev, "failed to enable DMIC clock, err: %d\n", err); return err; } regcache_cache_only(dmic->regmap, false); regcache_sync(dmic->regmap); return 0; } static int tegra210_dmic_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct tegra210_dmic *dmic = snd_soc_dai_get_drvdata(dai); unsigned int srate, clk_rate, channels; struct tegra_cif_conf cif_conf; unsigned long long gain_q23 = DEFAULT_GAIN_Q23; int err; memset(&cif_conf, 0, sizeof(struct tegra_cif_conf)); channels = params_channels(params); cif_conf.audio_ch = channels; switch (dmic->ch_select) { case DMIC_CH_SELECT_LEFT: case DMIC_CH_SELECT_RIGHT: cif_conf.client_ch = 1; break; case DMIC_CH_SELECT_STEREO: cif_conf.client_ch = 2; break; default: dev_err(dai->dev, "invalid DMIC client channels\n"); return -EINVAL; } srate = params_rate(params); /* * DMIC clock rate is a multiple of 'Over Sampling Ratio' and * 'Sample Rate'. The supported OSR values are 64, 128 and 256. */ clk_rate = (DMIC_OSR_FACTOR << dmic->osr_val) * srate; err = clk_set_rate(dmic->clk_dmic, clk_rate); if (err) { dev_err(dai->dev, "can't set DMIC clock rate %u, err: %d\n", clk_rate, err); return err; } regmap_update_bits(dmic->regmap, /* Reg */ TEGRA210_DMIC_CTRL, /* Mask */ TEGRA210_DMIC_CTRL_LRSEL_POLARITY_MASK | TEGRA210_DMIC_CTRL_OSR_MASK | TEGRA210_DMIC_CTRL_CHANNEL_SELECT_MASK, /* Value */ (dmic->lrsel << LRSEL_POL_SHIFT) | (dmic->osr_val << OSR_SHIFT) | ((dmic->ch_select + 1) << CH_SEL_SHIFT)); /* * Use LP filter gain register to apply boost. * Boost Gain Volume control has 100x factor. */ if (dmic->boost_gain) gain_q23 = div_u64(gain_q23 * dmic->boost_gain, 100); regmap_write(dmic->regmap, TEGRA210_DMIC_LP_FILTER_GAIN, (unsigned int)gain_q23); switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: cif_conf.audio_bits = TEGRA_ACIF_BITS_16; break; case SNDRV_PCM_FORMAT_S24_LE: case SNDRV_PCM_FORMAT_S32_LE: cif_conf.audio_bits = TEGRA_ACIF_BITS_32; break; default: dev_err(dai->dev, "unsupported format!\n"); return -EOPNOTSUPP; } cif_conf.client_bits = TEGRA_ACIF_BITS_24; cif_conf.mono_conv = dmic->mono_to_stereo; cif_conf.stereo_conv = dmic->stereo_to_mono; tegra_set_cif(dmic->regmap, TEGRA210_DMIC_TX_CIF_CTRL, &cif_conf); return 0; } static int tegra210_dmic_get_boost_gain(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); ucontrol->value.integer.value[0] = dmic->boost_gain; return 0; } static int tegra210_dmic_put_boost_gain(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); int value = ucontrol->value.integer.value[0]; if (value == dmic->boost_gain) return 0; dmic->boost_gain = value; return 1; } static int tegra210_dmic_get_ch_select(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); ucontrol->value.enumerated.item[0] = dmic->ch_select; return 0; } static int tegra210_dmic_put_ch_select(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); unsigned int value = ucontrol->value.enumerated.item[0]; if (value == dmic->ch_select) return 0; dmic->ch_select = value; return 1; } static int tegra210_dmic_get_mono_to_stereo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); ucontrol->value.enumerated.item[0] = dmic->mono_to_stereo; return 0; } static int tegra210_dmic_put_mono_to_stereo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); unsigned int value = ucontrol->value.enumerated.item[0]; if (value == dmic->mono_to_stereo) return 0; dmic->mono_to_stereo = value; return 1; } static int tegra210_dmic_get_stereo_to_mono(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); ucontrol->value.enumerated.item[0] = dmic->stereo_to_mono; return 0; } static int tegra210_dmic_put_stereo_to_mono(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); unsigned int value = ucontrol->value.enumerated.item[0]; if (value == dmic->stereo_to_mono) return 0; dmic->stereo_to_mono = value; return 1; } static int tegra210_dmic_get_osr_val(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); ucontrol->value.enumerated.item[0] = dmic->osr_val; return 0; } static int tegra210_dmic_put_osr_val(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); unsigned int value = ucontrol->value.enumerated.item[0]; if (value == dmic->osr_val) return 0; dmic->osr_val = value; return 1; } static int tegra210_dmic_get_pol_sel(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); ucontrol->value.enumerated.item[0] = dmic->lrsel; return 0; } static int tegra210_dmic_put_pol_sel(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); unsigned int value = ucontrol->value.enumerated.item[0]; if (value == dmic->lrsel) return 0; dmic->lrsel = value; return 1; } static const struct snd_soc_dai_ops tegra210_dmic_dai_ops = { .hw_params = tegra210_dmic_hw_params, }; static struct snd_soc_dai_driver tegra210_dmic_dais[] = { { .name = "DMIC-CIF", .capture = { .stream_name = "CIF-Capture", .channels_min = 1, .channels_max = 2, .rates = SNDRV_PCM_RATE_8000_48000, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE, }, }, { .name = "DMIC-DAP", .capture = { .stream_name = "DAP-Capture", .channels_min = 1, .channels_max = 2, .rates = SNDRV_PCM_RATE_8000_48000, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE, }, .ops = &tegra210_dmic_dai_ops, .symmetric_rate = 1, }, }; static const struct snd_soc_dapm_widget tegra210_dmic_widgets[] = { SND_SOC_DAPM_AIF_OUT("TX", NULL, 0, TEGRA210_DMIC_ENABLE, 0, 0), SND_SOC_DAPM_MIC("MIC", NULL), }; static const struct snd_soc_dapm_route tegra210_dmic_routes[] = { { "XBAR-RX", NULL, "XBAR-Capture" }, { "XBAR-Capture", NULL, "CIF-Capture" }, { "CIF-Capture", NULL, "TX" }, { "TX", NULL, "DAP-Capture" }, { "DAP-Capture", NULL, "MIC" }, }; static const char * const tegra210_dmic_ch_select[] = { "Left", "Right", "Stereo", }; static const struct soc_enum tegra210_dmic_ch_enum = SOC_ENUM_SINGLE(0, 0, ARRAY_SIZE(tegra210_dmic_ch_select), tegra210_dmic_ch_select); static const char * const tegra210_dmic_mono_conv_text[] = { "Zero", "Copy", }; static const char * const tegra210_dmic_stereo_conv_text[] = { "CH0", "CH1", "AVG", }; static const struct soc_enum tegra210_dmic_mono_conv_enum = SOC_ENUM_SINGLE(0, 0, ARRAY_SIZE(tegra210_dmic_mono_conv_text), tegra210_dmic_mono_conv_text); static const struct soc_enum tegra210_dmic_stereo_conv_enum = SOC_ENUM_SINGLE(0, 0, ARRAY_SIZE(tegra210_dmic_stereo_conv_text), tegra210_dmic_stereo_conv_text); static const char * const tegra210_dmic_osr_text[] = { "OSR_64", "OSR_128", "OSR_256", }; static const struct soc_enum tegra210_dmic_osr_enum = SOC_ENUM_SINGLE(0, 0, ARRAY_SIZE(tegra210_dmic_osr_text), tegra210_dmic_osr_text); static const char * const tegra210_dmic_lrsel_text[] = { "Left", "Right", }; static const struct soc_enum tegra210_dmic_lrsel_enum = SOC_ENUM_SINGLE(0, 0, ARRAY_SIZE(tegra210_dmic_lrsel_text), tegra210_dmic_lrsel_text); static const struct snd_kcontrol_new tegra210_dmic_controls[] = { SOC_SINGLE_EXT("Boost Gain Volume", 0, 0, MAX_BOOST_GAIN, 0, tegra210_dmic_get_boost_gain, tegra210_dmic_put_boost_gain), SOC_ENUM_EXT("Channel Select", tegra210_dmic_ch_enum, tegra210_dmic_get_ch_select, tegra210_dmic_put_ch_select), SOC_ENUM_EXT("Mono To Stereo", tegra210_dmic_mono_conv_enum, tegra210_dmic_get_mono_to_stereo, tegra210_dmic_put_mono_to_stereo), SOC_ENUM_EXT("Stereo To Mono", tegra210_dmic_stereo_conv_enum, tegra210_dmic_get_stereo_to_mono, tegra210_dmic_put_stereo_to_mono), SOC_ENUM_EXT("OSR Value", tegra210_dmic_osr_enum, tegra210_dmic_get_osr_val, tegra210_dmic_put_osr_val), SOC_ENUM_EXT("LR Polarity Select", tegra210_dmic_lrsel_enum, tegra210_dmic_get_pol_sel, tegra210_dmic_put_pol_sel), }; static const struct snd_soc_component_driver tegra210_dmic_compnt = { .dapm_widgets = tegra210_dmic_widgets, .num_dapm_widgets = ARRAY_SIZE(tegra210_dmic_widgets), .dapm_routes = tegra210_dmic_routes, .num_dapm_routes = ARRAY_SIZE(tegra210_dmic_routes), .controls = tegra210_dmic_controls, .num_controls = ARRAY_SIZE(tegra210_dmic_controls), }; static bool tegra210_dmic_wr_reg(struct device *dev, unsigned int reg) { switch (reg) { case TEGRA210_DMIC_TX_INT_MASK ... TEGRA210_DMIC_TX_CIF_CTRL: case TEGRA210_DMIC_ENABLE ... TEGRA210_DMIC_CG: case TEGRA210_DMIC_CTRL: case TEGRA210_DMIC_DBG_CTRL: case TEGRA210_DMIC_DCR_BIQUAD_0_COEF_4 ... TEGRA210_DMIC_LP_BIQUAD_1_COEF_4: return true; default: return false; } } static bool tegra210_dmic_rd_reg(struct device *dev, unsigned int reg) { if (tegra210_dmic_wr_reg(dev, reg)) return true; switch (reg) { case TEGRA210_DMIC_TX_STATUS: case TEGRA210_DMIC_TX_INT_STATUS: case TEGRA210_DMIC_STATUS: case TEGRA210_DMIC_INT_STATUS: return true; default: return false; } } static bool tegra210_dmic_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { case TEGRA210_DMIC_TX_STATUS: case TEGRA210_DMIC_TX_INT_STATUS: case TEGRA210_DMIC_TX_INT_SET: case TEGRA210_DMIC_SOFT_RESET: case TEGRA210_DMIC_STATUS: case TEGRA210_DMIC_INT_STATUS: return true; default: return false; } } static const struct regmap_config tegra210_dmic_regmap_config = { .reg_bits = 32, .reg_stride = 4, .val_bits = 32, .max_register = TEGRA210_DMIC_LP_BIQUAD_1_COEF_4, .writeable_reg = tegra210_dmic_wr_reg, .readable_reg = tegra210_dmic_rd_reg, .volatile_reg = tegra210_dmic_volatile_reg, .reg_defaults = tegra210_dmic_reg_defaults, .num_reg_defaults = ARRAY_SIZE(tegra210_dmic_reg_defaults), .cache_type = REGCACHE_FLAT, }; static int tegra210_dmic_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct tegra210_dmic *dmic; void __iomem *regs; int err; dmic = devm_kzalloc(dev, sizeof(*dmic), GFP_KERNEL); if (!dmic) return -ENOMEM; dmic->osr_val = DMIC_OSR_64; dmic->ch_select = DMIC_CH_SELECT_STEREO; dmic->lrsel = DMIC_LRSEL_LEFT; dmic->boost_gain = 0; dmic->stereo_to_mono = 0; /* "CH0" */ dev_set_drvdata(dev, dmic); dmic->clk_dmic = devm_clk_get(dev, "dmic"); if (IS_ERR(dmic->clk_dmic)) { dev_err(dev, "can't retrieve DMIC clock\n"); return PTR_ERR(dmic->clk_dmic); } regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(regs)) return PTR_ERR(regs); dmic->regmap = devm_regmap_init_mmio(dev, regs, &tegra210_dmic_regmap_config); if (IS_ERR(dmic->regmap)) { dev_err(dev, "regmap init failed\n"); return PTR_ERR(dmic->regmap); } regcache_cache_only(dmic->regmap, true); err = devm_snd_soc_register_component(dev, &tegra210_dmic_compnt, tegra210_dmic_dais, ARRAY_SIZE(tegra210_dmic_dais)); if (err) { dev_err(dev, "can't register DMIC component, err: %d\n", err); return err; } pm_runtime_enable(dev); return 0; } static void tegra210_dmic_remove(struct platform_device *pdev) { pm_runtime_disable(&pdev->dev); } static const struct dev_pm_ops tegra210_dmic_pm_ops = { SET_RUNTIME_PM_OPS(tegra210_dmic_runtime_suspend, tegra210_dmic_runtime_resume, NULL) SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) }; static const struct of_device_id tegra210_dmic_of_match[] = { { .compatible = "nvidia,tegra210-dmic" }, {}, }; MODULE_DEVICE_TABLE(of, tegra210_dmic_of_match); static struct platform_driver tegra210_dmic_driver = { .driver = { .name = "tegra210-dmic", .of_match_table = tegra210_dmic_of_match, .pm = &tegra210_dmic_pm_ops, }, .probe = tegra210_dmic_probe, .remove = tegra210_dmic_remove, }; module_platform_driver(tegra210_dmic_driver) MODULE_AUTHOR("Rahul Mittal "); MODULE_DESCRIPTION("Tegra210 ASoC DMIC driver"); MODULE_LICENSE("GPL v2");