// SPDX-License-Identifier: (GPL-2.0 OR MIT) // // Copyright (c) 2018 BayLibre, SAS. // Author: Jerome Brunet <[email protected]> #include <linux/clk.h> #include <linux/module.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/regmap.h> #include <sound/soc.h> #include <sound/soc-dai.h> #include <sound/pcm_params.h> #define PDM_CTRL … #define PDM_CTRL_EN … #define PDM_CTRL_OUT_MODE … #define PDM_CTRL_BYPASS_MODE … #define PDM_CTRL_RST_FIFO … #define PDM_CTRL_CHAN_RSTN_MASK … #define PDM_CTRL_CHAN_RSTN(x) … #define PDM_CTRL_CHAN_EN_MASK … #define PDM_CTRL_CHAN_EN(x) … #define PDM_HCIC_CTRL1 … #define PDM_FILTER_EN … #define PDM_HCIC_CTRL1_GAIN_SFT_MASK … #define PDM_HCIC_CTRL1_GAIN_SFT(x) … #define PDM_HCIC_CTRL1_GAIN_MULT_MASK … #define PDM_HCIC_CTRL1_GAIN_MULT(x) … #define PDM_HCIC_CTRL1_DSR_MASK … #define PDM_HCIC_CTRL1_DSR(x) … #define PDM_HCIC_CTRL1_STAGE_NUM_MASK … #define PDM_HCIC_CTRL1_STAGE_NUM(x) … #define PDM_HCIC_CTRL2 … #define PDM_F1_CTRL … #define PDM_LPF_ROUND_MODE_MASK … #define PDM_LPF_ROUND_MODE(x) … #define PDM_LPF_DSR_MASK … #define PDM_LPF_DSR(x) … #define PDM_LPF_STAGE_NUM_MASK … #define PDM_LPF_STAGE_NUM(x) … #define PDM_LPF_MAX_STAGE … #define PDM_LPF_NUM … #define PDM_F2_CTRL … #define PDM_F3_CTRL … #define PDM_HPF_CTRL … #define PDM_HPF_SFT_STEPS_MASK … #define PDM_HPF_SFT_STEPS(x) … #define PDM_HPF_OUT_FACTOR_MASK … #define PDM_HPF_OUT_FACTOR(x) … #define PDM_CHAN_CTRL … #define PDM_CHAN_CTRL_POINTER_WIDTH … #define PDM_CHAN_CTRL_POINTER_MAX … #define PDM_CHAN_CTRL_NUM … #define PDM_CHAN_CTRL1 … #define PDM_COEFF_ADDR … #define PDM_COEFF_DATA … #define PDM_CLKG_CTRL … #define PDM_STS … struct axg_pdm_lpf { … }; struct axg_pdm_hcic { … }; struct axg_pdm_hpf { … }; struct axg_pdm_filters { … }; struct axg_pdm_cfg { … }; struct axg_pdm { … }; static void axg_pdm_enable(struct regmap *map) { … } static void axg_pdm_disable(struct regmap *map) { … } static void axg_pdm_filters_enable(struct regmap *map, bool enable) { … } static int axg_pdm_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { … } static unsigned int axg_pdm_get_os(struct axg_pdm *priv) { … } static int axg_pdm_set_sysclk(struct axg_pdm *priv, unsigned int os, unsigned int rate) { … } static int axg_pdm_set_sample_pointer(struct axg_pdm *priv) { … } static void axg_pdm_set_channel_mask(struct axg_pdm *priv, unsigned int channels) { … } static int axg_pdm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { … } static int axg_pdm_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { … } static void axg_pdm_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { … } static void axg_pdm_set_hcic_ctrl(struct axg_pdm *priv) { … } static void axg_pdm_set_lpf_ctrl(struct axg_pdm *priv, unsigned int index) { … } static void axg_pdm_set_hpf_ctrl(struct axg_pdm *priv) { … } static int axg_pdm_set_lpf_filters(struct axg_pdm *priv) { … } static int axg_pdm_dai_probe(struct snd_soc_dai *dai) { … } static int axg_pdm_dai_remove(struct snd_soc_dai *dai) { … } static const struct snd_soc_dai_ops axg_pdm_dai_ops = …; static struct snd_soc_dai_driver axg_pdm_dai_drv = …; static const struct snd_soc_component_driver axg_pdm_component_drv = …; static const struct regmap_config axg_pdm_regmap_cfg = …; static const unsigned int lpf1_default_tap[] = …; static const unsigned int lpf2_default_tap[] = …; static const unsigned int lpf3_default_tap[] = …; /* * These values are sane defaults for the axg platform: * - OS = 64 * - Latency = 38700 (?) * * TODO: There is a lot of different HCIC, LPFs and HPF configurations possible. * the configuration may depend on the dmic used by the platform, the * expected tradeoff between latency and quality, etc ... If/When other * settings are required, we should add a fw interface to this driver to * load new filter settings. */ static const struct axg_pdm_filters axg_default_filters = …; static const struct axg_pdm_cfg axg_pdm_config = …; static const struct of_device_id axg_pdm_of_match[] = …; MODULE_DEVICE_TABLE(of, axg_pdm_of_match); static int axg_pdm_probe(struct platform_device *pdev) { … } static struct platform_driver axg_pdm_pdrv = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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