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570 lines
16 KiB
570 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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// |
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// tegra210_dmic.c - Tegra210 DMIC driver |
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// |
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// Copyright (c) 2020 NVIDIA CORPORATION. All rights reserved. |
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#include <linux/clk.h> |
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#include <linux/device.h> |
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#include <linux/math64.h> |
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#include <linux/module.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/regmap.h> |
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#include <sound/core.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include "tegra210_dmic.h" |
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#include "tegra_cif.h" |
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static const struct reg_default tegra210_dmic_reg_defaults[] = { |
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{ TEGRA210_DMIC_TX_INT_MASK, 0x00000001 }, |
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{ TEGRA210_DMIC_TX_CIF_CTRL, 0x00007700 }, |
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{ TEGRA210_DMIC_CG, 0x1 }, |
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{ TEGRA210_DMIC_CTRL, 0x00000301 }, |
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/* Below enables all filters - DCR, LP and SC */ |
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{ TEGRA210_DMIC_DBG_CTRL, 0xe }, |
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/* Below as per latest POR value */ |
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{ TEGRA210_DMIC_DCR_BIQUAD_0_COEF_4, 0x0 }, |
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/* LP filter is configured for pass through and used to apply gain */ |
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{ TEGRA210_DMIC_LP_BIQUAD_0_COEF_0, 0x00800000 }, |
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{ TEGRA210_DMIC_LP_BIQUAD_0_COEF_1, 0x0 }, |
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{ TEGRA210_DMIC_LP_BIQUAD_0_COEF_2, 0x0 }, |
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{ TEGRA210_DMIC_LP_BIQUAD_0_COEF_3, 0x0 }, |
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{ TEGRA210_DMIC_LP_BIQUAD_0_COEF_4, 0x0 }, |
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{ TEGRA210_DMIC_LP_BIQUAD_1_COEF_0, 0x00800000 }, |
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{ TEGRA210_DMIC_LP_BIQUAD_1_COEF_1, 0x0 }, |
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{ TEGRA210_DMIC_LP_BIQUAD_1_COEF_2, 0x0 }, |
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{ TEGRA210_DMIC_LP_BIQUAD_1_COEF_3, 0x0 }, |
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{ TEGRA210_DMIC_LP_BIQUAD_1_COEF_4, 0x0 }, |
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}; |
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static int __maybe_unused tegra210_dmic_runtime_suspend(struct device *dev) |
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{ |
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struct tegra210_dmic *dmic = dev_get_drvdata(dev); |
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regcache_cache_only(dmic->regmap, true); |
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regcache_mark_dirty(dmic->regmap); |
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clk_disable_unprepare(dmic->clk_dmic); |
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return 0; |
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} |
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static int __maybe_unused tegra210_dmic_runtime_resume(struct device *dev) |
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{ |
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struct tegra210_dmic *dmic = dev_get_drvdata(dev); |
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int err; |
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err = clk_prepare_enable(dmic->clk_dmic); |
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if (err) { |
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dev_err(dev, "failed to enable DMIC clock, err: %d\n", err); |
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return err; |
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} |
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regcache_cache_only(dmic->regmap, false); |
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regcache_sync(dmic->regmap); |
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return 0; |
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} |
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static int tegra210_dmic_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *dai) |
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{ |
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struct tegra210_dmic *dmic = snd_soc_dai_get_drvdata(dai); |
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unsigned int srate, clk_rate, channels; |
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struct tegra_cif_conf cif_conf; |
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unsigned long long gain_q23 = DEFAULT_GAIN_Q23; |
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int err; |
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memset(&cif_conf, 0, sizeof(struct tegra_cif_conf)); |
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channels = params_channels(params); |
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cif_conf.audio_ch = channels; |
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switch (dmic->ch_select) { |
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case DMIC_CH_SELECT_LEFT: |
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case DMIC_CH_SELECT_RIGHT: |
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cif_conf.client_ch = 1; |
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break; |
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case DMIC_CH_SELECT_STEREO: |
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cif_conf.client_ch = 2; |
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break; |
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default: |
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dev_err(dai->dev, "invalid DMIC client channels\n"); |
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return -EINVAL; |
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} |
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srate = params_rate(params); |
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/* |
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* DMIC clock rate is a multiple of 'Over Sampling Ratio' and |
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* 'Sample Rate'. The supported OSR values are 64, 128 and 256. |
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*/ |
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clk_rate = (DMIC_OSR_FACTOR << dmic->osr_val) * srate; |
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err = clk_set_rate(dmic->clk_dmic, clk_rate); |
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if (err) { |
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dev_err(dai->dev, "can't set DMIC clock rate %u, err: %d\n", |
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clk_rate, err); |
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return err; |
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} |
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regmap_update_bits(dmic->regmap, |
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/* Reg */ |
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TEGRA210_DMIC_CTRL, |
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/* Mask */ |
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TEGRA210_DMIC_CTRL_LRSEL_POLARITY_MASK | |
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TEGRA210_DMIC_CTRL_OSR_MASK | |
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TEGRA210_DMIC_CTRL_CHANNEL_SELECT_MASK, |
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/* Value */ |
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(dmic->lrsel << LRSEL_POL_SHIFT) | |
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(dmic->osr_val << OSR_SHIFT) | |
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((dmic->ch_select + 1) << CH_SEL_SHIFT)); |
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/* |
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* Use LP filter gain register to apply boost. |
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* Boost Gain Volume control has 100x factor. |
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*/ |
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if (dmic->boost_gain) |
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gain_q23 = div_u64(gain_q23 * dmic->boost_gain, 100); |
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regmap_write(dmic->regmap, TEGRA210_DMIC_LP_FILTER_GAIN, |
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(unsigned int)gain_q23); |
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switch (params_format(params)) { |
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case SNDRV_PCM_FORMAT_S16_LE: |
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cif_conf.audio_bits = TEGRA_ACIF_BITS_16; |
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break; |
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case SNDRV_PCM_FORMAT_S32_LE: |
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cif_conf.audio_bits = TEGRA_ACIF_BITS_32; |
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break; |
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default: |
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dev_err(dai->dev, "unsupported format!\n"); |
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return -EOPNOTSUPP; |
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} |
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cif_conf.client_bits = TEGRA_ACIF_BITS_24; |
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cif_conf.mono_conv = dmic->mono_to_stereo; |
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cif_conf.stereo_conv = dmic->stereo_to_mono; |
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tegra_set_cif(dmic->regmap, TEGRA210_DMIC_TX_CIF_CTRL, &cif_conf); |
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return 0; |
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} |
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static int tegra210_dmic_get_boost_gain(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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ucontrol->value.integer.value[0] = dmic->boost_gain; |
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return 0; |
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} |
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static int tegra210_dmic_put_boost_gain(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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int value = ucontrol->value.integer.value[0]; |
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if (value == dmic->boost_gain) |
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return 0; |
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dmic->boost_gain = value; |
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return 1; |
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} |
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static int tegra210_dmic_get_ch_select(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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ucontrol->value.enumerated.item[0] = dmic->ch_select; |
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return 0; |
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} |
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static int tegra210_dmic_put_ch_select(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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unsigned int value = ucontrol->value.enumerated.item[0]; |
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if (value == dmic->ch_select) |
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return 0; |
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dmic->ch_select = value; |
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return 1; |
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} |
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static int tegra210_dmic_get_mono_to_stereo(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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ucontrol->value.enumerated.item[0] = dmic->mono_to_stereo; |
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return 0; |
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} |
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static int tegra210_dmic_put_mono_to_stereo(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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unsigned int value = ucontrol->value.enumerated.item[0]; |
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if (value == dmic->mono_to_stereo) |
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return 0; |
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dmic->mono_to_stereo = value; |
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return 1; |
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} |
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static int tegra210_dmic_get_stereo_to_mono(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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ucontrol->value.enumerated.item[0] = dmic->stereo_to_mono; |
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return 0; |
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} |
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static int tegra210_dmic_put_stereo_to_mono(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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unsigned int value = ucontrol->value.enumerated.item[0]; |
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if (value == dmic->stereo_to_mono) |
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return 0; |
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dmic->stereo_to_mono = value; |
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return 1; |
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} |
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static int tegra210_dmic_get_osr_val(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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ucontrol->value.enumerated.item[0] = dmic->osr_val; |
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return 0; |
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} |
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static int tegra210_dmic_put_osr_val(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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unsigned int value = ucontrol->value.enumerated.item[0]; |
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if (value == dmic->osr_val) |
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return 0; |
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dmic->osr_val = value; |
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return 1; |
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} |
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static int tegra210_dmic_get_pol_sel(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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ucontrol->value.enumerated.item[0] = dmic->lrsel; |
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return 0; |
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} |
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static int tegra210_dmic_put_pol_sel(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol); |
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struct tegra210_dmic *dmic = snd_soc_component_get_drvdata(comp); |
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unsigned int value = ucontrol->value.enumerated.item[0]; |
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if (value == dmic->lrsel) |
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return 0; |
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dmic->lrsel = value; |
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return 1; |
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} |
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static const struct snd_soc_dai_ops tegra210_dmic_dai_ops = { |
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.hw_params = tegra210_dmic_hw_params, |
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}; |
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static struct snd_soc_dai_driver tegra210_dmic_dais[] = { |
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{ |
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.name = "DMIC-CIF", |
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.capture = { |
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.stream_name = "CIF-Capture", |
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.channels_min = 1, |
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.channels_max = 2, |
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.rates = SNDRV_PCM_RATE_8000_48000, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | |
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SNDRV_PCM_FMTBIT_S32_LE, |
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}, |
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}, |
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{ |
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.name = "DMIC-DAP", |
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.capture = { |
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.stream_name = "DAP-Capture", |
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.channels_min = 1, |
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.channels_max = 2, |
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.rates = SNDRV_PCM_RATE_8000_48000, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | |
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SNDRV_PCM_FMTBIT_S32_LE, |
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}, |
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.ops = &tegra210_dmic_dai_ops, |
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.symmetric_rate = 1, |
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}, |
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}; |
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static const struct snd_soc_dapm_widget tegra210_dmic_widgets[] = { |
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SND_SOC_DAPM_AIF_OUT("TX", NULL, 0, TEGRA210_DMIC_ENABLE, 0, 0), |
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SND_SOC_DAPM_MIC("MIC", NULL), |
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}; |
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static const struct snd_soc_dapm_route tegra210_dmic_routes[] = { |
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{ "XBAR-RX", NULL, "XBAR-Capture" }, |
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{ "XBAR-Capture", NULL, "CIF-Capture" }, |
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{ "CIF-Capture", NULL, "TX" }, |
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{ "TX", NULL, "DAP-Capture" }, |
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{ "DAP-Capture", NULL, "MIC" }, |
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}; |
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static const char * const tegra210_dmic_ch_select[] = { |
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"Left", "Right", "Stereo", |
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}; |
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static const struct soc_enum tegra210_dmic_ch_enum = |
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SOC_ENUM_SINGLE(0, 0, ARRAY_SIZE(tegra210_dmic_ch_select), |
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tegra210_dmic_ch_select); |
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static const char * const tegra210_dmic_mono_conv_text[] = { |
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"Zero", "Copy", |
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}; |
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static const char * const tegra210_dmic_stereo_conv_text[] = { |
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"CH0", "CH1", "AVG", |
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}; |
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static const struct soc_enum tegra210_dmic_mono_conv_enum = |
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SOC_ENUM_SINGLE(0, 0, ARRAY_SIZE(tegra210_dmic_mono_conv_text), |
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tegra210_dmic_mono_conv_text); |
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static const struct soc_enum tegra210_dmic_stereo_conv_enum = |
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SOC_ENUM_SINGLE(0, 0, ARRAY_SIZE(tegra210_dmic_stereo_conv_text), |
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tegra210_dmic_stereo_conv_text); |
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static const char * const tegra210_dmic_osr_text[] = { |
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"OSR_64", "OSR_128", "OSR_256", |
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}; |
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static const struct soc_enum tegra210_dmic_osr_enum = |
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SOC_ENUM_SINGLE(0, 0, ARRAY_SIZE(tegra210_dmic_osr_text), |
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tegra210_dmic_osr_text); |
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static const char * const tegra210_dmic_lrsel_text[] = { |
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"Left", "Right", |
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}; |
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static const struct soc_enum tegra210_dmic_lrsel_enum = |
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SOC_ENUM_SINGLE(0, 0, ARRAY_SIZE(tegra210_dmic_lrsel_text), |
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tegra210_dmic_lrsel_text); |
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static const struct snd_kcontrol_new tegra210_dmic_controls[] = { |
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SOC_SINGLE_EXT("Boost Gain Volume", 0, 0, MAX_BOOST_GAIN, 0, |
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tegra210_dmic_get_boost_gain, |
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tegra210_dmic_put_boost_gain), |
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SOC_ENUM_EXT("Channel Select", tegra210_dmic_ch_enum, |
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tegra210_dmic_get_ch_select, tegra210_dmic_put_ch_select), |
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SOC_ENUM_EXT("Mono To Stereo", |
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tegra210_dmic_mono_conv_enum, |
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tegra210_dmic_get_mono_to_stereo, |
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tegra210_dmic_put_mono_to_stereo), |
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SOC_ENUM_EXT("Stereo To Mono", |
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tegra210_dmic_stereo_conv_enum, |
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tegra210_dmic_get_stereo_to_mono, |
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tegra210_dmic_put_stereo_to_mono), |
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SOC_ENUM_EXT("OSR Value", tegra210_dmic_osr_enum, |
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tegra210_dmic_get_osr_val, tegra210_dmic_put_osr_val), |
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SOC_ENUM_EXT("LR Polarity Select", tegra210_dmic_lrsel_enum, |
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tegra210_dmic_get_pol_sel, tegra210_dmic_put_pol_sel), |
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}; |
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static const struct snd_soc_component_driver tegra210_dmic_compnt = { |
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.dapm_widgets = tegra210_dmic_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(tegra210_dmic_widgets), |
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.dapm_routes = tegra210_dmic_routes, |
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.num_dapm_routes = ARRAY_SIZE(tegra210_dmic_routes), |
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.controls = tegra210_dmic_controls, |
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.num_controls = ARRAY_SIZE(tegra210_dmic_controls), |
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}; |
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static bool tegra210_dmic_wr_reg(struct device *dev, unsigned int reg) |
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{ |
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switch (reg) { |
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case TEGRA210_DMIC_TX_INT_MASK ... TEGRA210_DMIC_TX_CIF_CTRL: |
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case TEGRA210_DMIC_ENABLE ... TEGRA210_DMIC_CG: |
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case TEGRA210_DMIC_CTRL: |
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case TEGRA210_DMIC_DBG_CTRL: |
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case TEGRA210_DMIC_DCR_BIQUAD_0_COEF_4 ... TEGRA210_DMIC_LP_BIQUAD_1_COEF_4: |
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return true; |
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default: |
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return false; |
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} |
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} |
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static bool tegra210_dmic_rd_reg(struct device *dev, unsigned int reg) |
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{ |
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if (tegra210_dmic_wr_reg(dev, reg)) |
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return true; |
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switch (reg) { |
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case TEGRA210_DMIC_TX_STATUS: |
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case TEGRA210_DMIC_TX_INT_STATUS: |
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case TEGRA210_DMIC_STATUS: |
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case TEGRA210_DMIC_INT_STATUS: |
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return true; |
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default: |
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return false; |
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} |
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} |
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static bool tegra210_dmic_volatile_reg(struct device *dev, unsigned int reg) |
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{ |
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switch (reg) { |
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case TEGRA210_DMIC_TX_STATUS: |
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case TEGRA210_DMIC_TX_INT_STATUS: |
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case TEGRA210_DMIC_TX_INT_SET: |
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case TEGRA210_DMIC_SOFT_RESET: |
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case TEGRA210_DMIC_STATUS: |
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case TEGRA210_DMIC_INT_STATUS: |
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return true; |
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default: |
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return false; |
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} |
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} |
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static const struct regmap_config tegra210_dmic_regmap_config = { |
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.reg_bits = 32, |
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.reg_stride = 4, |
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.val_bits = 32, |
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.max_register = TEGRA210_DMIC_LP_BIQUAD_1_COEF_4, |
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.writeable_reg = tegra210_dmic_wr_reg, |
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.readable_reg = tegra210_dmic_rd_reg, |
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.volatile_reg = tegra210_dmic_volatile_reg, |
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.reg_defaults = tegra210_dmic_reg_defaults, |
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.num_reg_defaults = ARRAY_SIZE(tegra210_dmic_reg_defaults), |
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.cache_type = REGCACHE_FLAT, |
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}; |
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static int tegra210_dmic_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct tegra210_dmic *dmic; |
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void __iomem *regs; |
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int err; |
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dmic = devm_kzalloc(dev, sizeof(*dmic), GFP_KERNEL); |
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if (!dmic) |
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return -ENOMEM; |
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dmic->osr_val = DMIC_OSR_64; |
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dmic->ch_select = DMIC_CH_SELECT_STEREO; |
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dmic->lrsel = DMIC_LRSEL_LEFT; |
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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 <[email protected]>"); |
|
MODULE_DESCRIPTION("Tegra210 ASoC DMIC driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|