// SPDX-License-Identifier: GPL-2.0 // // Driver for Microchip Pulse Density Microphone Controller (PDMC) interfaces // // Copyright (C) 2019-2022 Microchip Technology Inc. and its subsidiaries // // Author: Codrin Ciubotariu <[email protected]> #include <dt-bindings/sound/microchip,pdmc.h> #include <linux/bitfield.h> #include <linux/clk.h> #include <linux/module.h> #include <linux/of.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <sound/core.h> #include <sound/dmaengine_pcm.h> #include <sound/pcm_params.h> #include <sound/tlv.h> /* * ---- PDMC Register map ---- */ #define MCHP_PDMC_CR … #define MCHP_PDMC_MR … #define MCHP_PDMC_CFGR … #define MCHP_PDMC_RHR … #define MCHP_PDMC_IER … #define MCHP_PDMC_IDR … #define MCHP_PDMC_IMR … #define MCHP_PDMC_ISR … #define MCHP_PDMC_VER … /* * ---- Control Register (Write-only) ---- */ #define MCHP_PDMC_CR_SWRST … /* * ---- Mode Register (Read/Write) ---- */ #define MCHP_PDMC_MR_PDMCEN_MASK … #define MCHP_PDMC_MR_PDMCEN(ch) … #define MCHP_PDMC_MR_OSR_MASK … #define MCHP_PDMC_MR_OSR64 … #define MCHP_PDMC_MR_OSR128 … #define MCHP_PDMC_MR_OSR256 … #define MCHP_PDMC_MR_SINCORDER_MASK … #define MCHP_PDMC_MR_SINC_OSR_MASK … #define MCHP_PDMC_MR_SINC_OSR_DIS … #define MCHP_PDMC_MR_SINC_OSR_8 … #define MCHP_PDMC_MR_SINC_OSR_16 … #define MCHP_PDMC_MR_SINC_OSR_32 … #define MCHP_PDMC_MR_SINC_OSR_64 … #define MCHP_PDMC_MR_SINC_OSR_128 … #define MCHP_PDMC_MR_SINC_OSR_256 … #define MCHP_PDMC_MR_CHUNK_MASK … /* * ---- Configuration Register (Read/Write) ---- */ #define MCHP_PDMC_CFGR_BSSEL_MASK … #define MCHP_PDMC_CFGR_BSSEL(ch) … #define MCHP_PDMC_CFGR_PDMSEL_MASK … #define MCHP_PDMC_CFGR_PDMSEL(ch) … /* * ---- Interrupt Enable/Disable/Mask/Status Registers ---- */ #define MCHP_PDMC_IR_RXRDY … #define MCHP_PDMC_IR_RXEMPTY … #define MCHP_PDMC_IR_RXFULL … #define MCHP_PDMC_IR_RXCHUNK … #define MCHP_PDMC_IR_RXUDR … #define MCHP_PDMC_IR_RXOVR … /* * ---- Version Register (Read-only) ---- */ #define MCHP_PDMC_VER_VERSION … #define MCHP_PDMC_MAX_CHANNELS … #define MCHP_PDMC_DS_NO … #define MCHP_PDMC_EDGE_NO … struct mic_map { … }; struct mchp_pdmc_chmap { … }; struct mchp_pdmc { … }; static const char *const mchp_pdmc_sinc_filter_order_text[] = …; static const unsigned int mchp_pdmc_sinc_filter_order_values[] = …; static const struct soc_enum mchp_pdmc_sinc_filter_order_enum = …; static int mchp_pdmc_sinc_order_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_pdmc_sinc_order_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_pdmc_af_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_pdmc_af_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_pdmc_chmap_ctl_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static inline struct snd_pcm_substream * mchp_pdmc_chmap_substream(struct mchp_pdmc_chmap *info, unsigned int idx) { … } static struct snd_pcm_chmap_elem *mchp_pdmc_chmap_get(struct snd_pcm_substream *substream, struct mchp_pdmc_chmap *ch_info) { … } static int mchp_pdmc_chmap_ctl_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int mchp_pdmc_chmap_ctl_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static void mchp_pdmc_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) { … } static int mchp_pdmc_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, unsigned int size, unsigned int __user *tlv) { … } static const struct snd_kcontrol_new mchp_pdmc_snd_controls[] = …; static int mchp_pdmc_close(struct snd_soc_component *component, struct snd_pcm_substream *substream) { … } static int mchp_pdmc_open(struct snd_soc_component *component, struct snd_pcm_substream *substream) { … } static const struct snd_soc_component_driver mchp_pdmc_dai_component = …; static const unsigned int mchp_pdmc_1mic[] = …; static const unsigned int mchp_pdmc_2mic[] = …; static const unsigned int mchp_pdmc_3mic[] = …; static const unsigned int mchp_pdmc_4mic[] = …; static const struct snd_pcm_hw_constraint_list mchp_pdmc_chan_constr[] = …; static int mchp_pdmc_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { … } static int mchp_pdmc_dai_probe(struct snd_soc_dai *dai) { … } static int mchp_pdmc_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { … } static u32 mchp_pdmc_mr_set_osr(int audio_filter_en, unsigned int osr) { … } static inline int mchp_pdmc_period_to_maxburst(int period_size) { … } static struct snd_pcm_chmap_elem mchp_pdmc_std_chmaps[] = …; static int mchp_pdmc_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { … } static void mchp_pdmc_noise_filter_workaround(struct mchp_pdmc *dd) { … } static int mchp_pdmc_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { … } static int mchp_pdmc_add_chmap_ctls(struct snd_pcm *pcm, struct mchp_pdmc *dd) { … } static int mchp_pdmc_pcm_new(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai) { … } static const struct snd_soc_dai_ops mchp_pdmc_dai_ops = …; static struct snd_soc_dai_driver mchp_pdmc_dai = …; /* PDMC interrupt handler */ static irqreturn_t mchp_pdmc_interrupt(int irq, void *dev_id) { … } /* regmap configuration */ static bool mchp_pdmc_readable_reg(struct device *dev, unsigned int reg) { … } static bool mchp_pdmc_writeable_reg(struct device *dev, unsigned int reg) { … } static bool mchp_pdmc_volatile_reg(struct device *dev, unsigned int reg) { … } static bool mchp_pdmc_precious_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config mchp_pdmc_regmap_config = …; static int mchp_pdmc_dt_init(struct mchp_pdmc *dd) { … } /* used to clean the channel index found on RHR's MSB */ static int mchp_pdmc_process(struct snd_pcm_substream *substream, int channel, unsigned long hwoff, unsigned long bytes) { … } static struct snd_dmaengine_pcm_config mchp_pdmc_config = …; static int mchp_pdmc_runtime_suspend(struct device *dev) { … } static int mchp_pdmc_runtime_resume(struct device *dev) { … } static int mchp_pdmc_probe(struct platform_device *pdev) { … } static void mchp_pdmc_remove(struct platform_device *pdev) { … } static const struct of_device_id mchp_pdmc_of_match[] = …; MODULE_DEVICE_TABLE(of, mchp_pdmc_of_match); static const struct dev_pm_ops mchp_pdmc_pm_ops = …; static struct platform_driver mchp_pdmc_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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