// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2021 Stephan Gerhold * * Register definitions/sequences taken from various tfa98xx kernel drivers: * Copyright (C) 2014-2020 NXP Semiconductors, All Rights Reserved. * Copyright (C) 2013 Sony Mobile Communications Inc. */ #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <sound/soc.h> #define TFA989X_STATUSREG … #define TFA989X_BATTERYVOLTAGE … #define TFA989X_TEMPERATURE … #define TFA989X_REVISIONNUMBER … #define TFA989X_REVISIONNUMBER_REV_MSK … #define TFA989X_I2SREG … #define TFA989X_I2SREG_RCV … #define TFA989X_I2SREG_CHSA … #define TFA989X_I2SREG_CHSA_MSK … #define TFA989X_I2SREG_I2SSR … #define TFA989X_I2SREG_I2SSR_MSK … #define TFA989X_BAT_PROT … #define TFA989X_AUDIO_CTR … #define TFA989X_DCDCBOOST … #define TFA989X_SPKR_CALIBRATION … #define TFA989X_SYS_CTRL … #define TFA989X_SYS_CTRL_PWDN … #define TFA989X_SYS_CTRL_I2CR … #define TFA989X_SYS_CTRL_CFE … #define TFA989X_SYS_CTRL_AMPE … #define TFA989X_SYS_CTRL_DCA … #define TFA989X_SYS_CTRL_SBSL … #define TFA989X_SYS_CTRL_AMPC … #define TFA989X_I2S_SEL_REG … #define TFA989X_I2S_SEL_REG_SPKR_MSK … #define TFA989X_I2S_SEL_REG_DCFG_MSK … #define TFA989X_HIDE_UNHIDE_KEY … #define TFA989X_PWM_CONTROL … #define TFA989X_CURRENTSENSE1 … #define TFA989X_CURRENTSENSE2 … #define TFA989X_CURRENTSENSE3 … #define TFA989X_CURRENTSENSE4 … #define TFA9890_REVISION … #define TFA9895_REVISION … #define TFA9897_REVISION … struct tfa989x_rev { … }; struct tfa989x { … }; static bool tfa989x_writeable_reg(struct device *dev, unsigned int reg) { … } static bool tfa989x_volatile_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config tfa989x_regmap = …; static const char * const chsa_text[] = …; static SOC_ENUM_SINGLE_DECL(chsa_enum, TFA989X_I2SREG, TFA989X_I2SREG_CHSA, chsa_text); static const struct snd_kcontrol_new chsa_mux = …; static const struct snd_soc_dapm_widget tfa989x_dapm_widgets[] = …; static const struct snd_soc_dapm_route tfa989x_dapm_routes[] = …; static int tfa989x_put_mode(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static const char * const mode_text[] = …; static SOC_ENUM_SINGLE_DECL(mode_enum, TFA989X_I2SREG, TFA989X_I2SREG_RCV, mode_text); static const struct snd_kcontrol_new tfa989x_mode_controls[] = …; static int tfa989x_probe(struct snd_soc_component *component) { … } static const struct snd_soc_component_driver tfa989x_component = …; static const unsigned int tfa989x_rates[] = …; static int tfa989x_find_sample_rate(unsigned int rate) { … } static int tfa989x_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { … } static const struct snd_soc_dai_ops tfa989x_dai_ops = …; static struct snd_soc_dai_driver tfa989x_dai = …; static int tfa9890_init(struct regmap *regmap) { … } static const struct tfa989x_rev tfa9890_rev = …; static const struct reg_sequence tfa9895_reg_init[] = …; static int tfa9895_init(struct regmap *regmap) { … } static const struct tfa989x_rev tfa9895_rev = …; static int tfa9897_init(struct regmap *regmap) { … } static const struct tfa989x_rev tfa9897_rev = …; /* * Note: At the moment this driver bypasses the "CoolFlux DSP" built into the * TFA989X amplifiers. Unfortunately, there seems to be absolutely * no documentation for it - the public "short datasheets" do not provide * any information about the DSP or available registers. * * Usually the TFA989X amplifiers are configured through proprietary userspace * libraries. There are also some (rather complex) kernel drivers but even those * rely on obscure firmware blobs for configuration (so-called "containers"). * They seem to contain different "profiles" with tuned speaker settings, sample * rates and volume steps (which would be better exposed as separate ALSA mixers). * * Bypassing the DSP disables volume control (and perhaps some speaker * optimization?), but at least allows using the speaker without obscure * kernel drivers and firmware. * * Ideally NXP (or now Goodix) should release proper documentation for these * amplifiers so that support for the "CoolFlux DSP" can be implemented properly. */ static int tfa989x_dsp_bypass(struct regmap *regmap) { … } static void tfa989x_regulator_disable(void *data) { … } static int tfa989x_i2c_probe(struct i2c_client *i2c) { … } static const struct of_device_id tfa989x_of_match[] = …; MODULE_DEVICE_TABLE(of, tfa989x_of_match); static struct i2c_driver tfa989x_i2c_driver = …; module_i2c_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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