// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause // Copyright 2018 NXP #include <linux/bitfield.h> #include <linux/clk.h> #include <linux/device.h> #include <linux/interrupt.h> #include <linux/kobject.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/sysfs.h> #include <linux/types.h> #include <linux/dma/imx-dma.h> #include <sound/dmaengine_pcm.h> #include <sound/pcm.h> #include <sound/soc.h> #include <sound/tlv.h> #include <sound/core.h> #include "fsl_micfil.h" #include "fsl_utils.h" #define MICFIL_OSR_DEFAULT … enum quality { … }; struct fsl_micfil { … }; struct fsl_micfil_soc_data { … }; static struct fsl_micfil_soc_data fsl_micfil_imx8mm = …; static struct fsl_micfil_soc_data fsl_micfil_imx8mp = …; static struct fsl_micfil_soc_data fsl_micfil_imx93 = …; static const struct of_device_id fsl_micfil_dt_ids[] = …; MODULE_DEVICE_TABLE(of, fsl_micfil_dt_ids); static const char * const micfil_quality_select_texts[] = …; static const struct soc_enum fsl_micfil_quality_enum = …; static DECLARE_TLV_DB_SCALE(gain_tlv, 0, 100, 0); static int micfil_set_quality(struct fsl_micfil *micfil) { … } static int micfil_quality_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int micfil_quality_set(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static const char * const micfil_hwvad_enable[] = …; static const char * const micfil_hwvad_init_mode[] = …; static const char * const micfil_hwvad_hpf_texts[] = …; /* * DC Remover Control * Filter Bypassed 1 1 * Cut-off @21Hz 0 0 * Cut-off @83Hz 0 1 * Cut-off @152HZ 1 0 */ static const char * const micfil_dc_remover_texts[] = …; static const struct soc_enum hwvad_enable_enum = …; static const struct soc_enum hwvad_init_mode_enum = …; static const struct soc_enum hwvad_hpf_enum = …; static const struct soc_enum fsl_micfil_dc_remover_enum = …; static int micfil_put_dc_remover_state(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int micfil_get_dc_remover_state(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int hwvad_put_enable(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int hwvad_get_enable(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int hwvad_put_init_mode(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int hwvad_get_init_mode(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int hwvad_detected(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static const struct snd_kcontrol_new fsl_micfil_snd_controls[] = …; static int fsl_micfil_use_verid(struct device *dev) { … } /* The SRES is a self-negated bit which provides the CPU with the * capability to initialize the PDM Interface module through the * slave-bus interface. This bit always reads as zero, and this * bit is only effective when MDIS is cleared */ static int fsl_micfil_reset(struct device *dev) { … } static int fsl_micfil_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { … } /* Enable/disable hwvad interrupts */ static int fsl_micfil_configure_hwvad_interrupts(struct fsl_micfil *micfil, int enable) { … } /* Configuration done only in energy-based initialization mode */ static int fsl_micfil_init_hwvad_energy_mode(struct fsl_micfil *micfil) { … } /* Configuration done only in envelope-based initialization mode */ static int fsl_micfil_init_hwvad_envelope_mode(struct fsl_micfil *micfil) { … } /* * Hardware Voice Active Detection: The HWVAD takes data from the input * of a selected PDM microphone to detect if there is any * voice activity. When a voice activity is detected, an interrupt could * be delivered to the system. Initialization in section 8.4: * Can work in two modes: * -> Eneveope-based mode (section 8.4.1) * -> Energy-based mode (section 8.4.2) * * It is important to remark that the HWVAD detector could be enabled * or reset only when the MICFIL isn't running i.e. when the BSY_FIL * bit in STAT register is cleared */ static int fsl_micfil_hwvad_enable(struct fsl_micfil *micfil) { … } static int fsl_micfil_hwvad_disable(struct fsl_micfil *micfil) { … } static int fsl_micfil_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { … } static int fsl_micfil_reparent_rootclk(struct fsl_micfil *micfil, unsigned int sample_rate) { … } static int fsl_micfil_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { … } static int fsl_micfil_dai_probe(struct snd_soc_dai *cpu_dai) { … } static const struct snd_soc_dai_ops fsl_micfil_dai_ops = …; static struct snd_soc_dai_driver fsl_micfil_dai = …; static const struct snd_soc_component_driver fsl_micfil_component = …; /* REGMAP */ static const struct reg_default fsl_micfil_reg_defaults[] = …; static bool fsl_micfil_readable_reg(struct device *dev, unsigned int reg) { … } static bool fsl_micfil_writeable_reg(struct device *dev, unsigned int reg) { … } static bool fsl_micfil_volatile_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config fsl_micfil_regmap_config = …; /* END OF REGMAP */ static irqreturn_t micfil_isr(int irq, void *devid) { … } static irqreturn_t micfil_err_isr(int irq, void *devid) { … } static irqreturn_t voice_detected_fn(int irq, void *devid) { … } static irqreturn_t hwvad_isr(int irq, void *devid) { … } static irqreturn_t hwvad_err_isr(int irq, void *devid) { … } static int fsl_micfil_runtime_suspend(struct device *dev); static int fsl_micfil_runtime_resume(struct device *dev); static int fsl_micfil_probe(struct platform_device *pdev) { … } static void fsl_micfil_remove(struct platform_device *pdev) { … } static int fsl_micfil_runtime_suspend(struct device *dev) { … } static int fsl_micfil_runtime_resume(struct device *dev) { … } static const struct dev_pm_ops fsl_micfil_pm_ops = …; static struct platform_driver fsl_micfil_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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