// SPDX-License-Identifier: GPL-2.0 // // Driver for the TAS5805M Audio Amplifier // // Author: Andy Liu <[email protected]> // Author: Daniel Beer <[email protected]> // // This is based on a driver originally written by Andy Liu at TI and // posted here: // // https://e2e.ti.com/support/audio-group/audio/f/audio-forum/722027/linux-tas5825m-linux-drivers // // It has been simplified a little and reworked for the 5.x ALSA SoC API. #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/firmware.h> #include <linux/slab.h> #include <linux/of.h> #include <linux/init.h> #include <linux/i2c.h> #include <linux/regmap.h> #include <linux/gpio/consumer.h> #include <linux/regulator/consumer.h> #include <linux/atomic.h> #include <linux/workqueue.h> #include <sound/soc.h> #include <sound/pcm.h> #include <sound/initval.h> /* Datasheet-defined registers on page 0, book 0 */ #define REG_PAGE … #define REG_DEVICE_CTRL_1 … #define REG_DEVICE_CTRL_2 … #define REG_SIG_CH_CTRL … #define REG_SAP_CTRL_1 … #define REG_FS_MON … #define REG_BCK_MON … #define REG_CLKDET_STATUS … #define REG_VOL_CTL … #define REG_AGAIN … #define REG_ADR_PIN_CTRL … #define REG_ADR_PIN_CONFIG … #define REG_CHAN_FAULT … #define REG_GLOBAL_FAULT1 … #define REG_GLOBAL_FAULT2 … #define REG_FAULT … #define REG_BOOK … /* DEVICE_CTRL_2 register values */ #define DCTRL2_MODE_DEEP_SLEEP … #define DCTRL2_MODE_SLEEP … #define DCTRL2_MODE_HIZ … #define DCTRL2_MODE_PLAY … #define DCTRL2_MUTE … #define DCTRL2_DIS_DSP … /* This sequence of register writes must always be sent, prior to the * 5ms delay while we wait for the DSP to boot. */ static const uint8_t dsp_cfg_preboot[] = …; static const uint32_t tas5805m_volume[] = …; #define TAS5805M_VOLUME_MAX … #define TAS5805M_VOLUME_MIN … struct tas5805m_priv { … }; static void set_dsp_scale(struct regmap *rm, int offset, int vol) { … } static void tas5805m_refresh(struct tas5805m_priv *tas5805m) { … } static int tas5805m_vol_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int tas5805m_vol_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static inline int volume_is_valid(int v) { … } static int tas5805m_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static const struct snd_kcontrol_new tas5805m_snd_controls[] = …; static void send_cfg(struct regmap *rm, const uint8_t *s, unsigned int len) { … } /* The TAS5805M DSP can't be configured until the I2S clock has been * present and stable for 5ms, or else it won't boot and we get no * sound. */ static int tas5805m_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { … } static void do_work(struct work_struct *work) { … } static int tas5805m_dac_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { … } static const struct snd_soc_dapm_route tas5805m_audio_map[] = …; static const struct snd_soc_dapm_widget tas5805m_dapm_widgets[] = …; static const struct snd_soc_component_driver soc_codec_dev_tas5805m = …; static int tas5805m_mute(struct snd_soc_dai *dai, int mute, int direction) { … } static const struct snd_soc_dai_ops tas5805m_dai_ops = …; static struct snd_soc_dai_driver tas5805m_dai = …; static const struct regmap_config tas5805m_regmap = …; static int tas5805m_i2c_probe(struct i2c_client *i2c) { … } static void tas5805m_i2c_remove(struct i2c_client *i2c) { … } static const struct i2c_device_id tas5805m_i2c_id[] = …; MODULE_DEVICE_TABLE(i2c, tas5805m_i2c_id); #if IS_ENABLED(CONFIG_OF) static const struct of_device_id tas5805m_of_match[] = …; MODULE_DEVICE_TABLE(of, tas5805m_of_match); #endif static struct i2c_driver tas5805m_i2c_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux