diff options
Diffstat (limited to 'sound/soc/tegra/tegra210_dmic.c')
| -rw-r--r-- | sound/soc/tegra/tegra210_dmic.c | 570 |
1 files changed, 570 insertions, 0 deletions
diff --git a/sound/soc/tegra/tegra210_dmic.c b/sound/soc/tegra/tegra210_dmic.c new file mode 100644 index 000000000..db9579453 --- /dev/null +++ b/sound/soc/tegra/tegra210_dmic.c @@ -0,0 +1,570 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// tegra210_dmic.c - Tegra210 DMIC driver +// +// Copyright (c) 2020 NVIDIA CORPORATION. All rights reserved. + +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/math64.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <sound/core.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#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_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_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_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 int tegra210_dmic_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + + return 0; +} + +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 <rmittal@nvidia.com>"); +MODULE_DESCRIPTION("Tegra210 ASoC DMIC driver"); +MODULE_LICENSE("GPL v2"); |