// SPDX-License-Identifier: (GPL-2.0 OR MIT) // // Copyright (c) 2018 BayLibre, SAS. // Author: Jerome Brunet <[email protected]> #include <linux/bitfield.h> #include <linux/clk.h> #include <linux/module.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 SPDIFIN_CTRL0 … #define SPDIFIN_CTRL0_EN … #define SPDIFIN_CTRL0_RST_OUT … #define SPDIFIN_CTRL0_RST_IN … #define SPDIFIN_CTRL0_WIDTH_SEL … #define SPDIFIN_CTRL0_STATUS_CH_SHIFT … #define SPDIFIN_CTRL0_STATUS_SEL … #define SPDIFIN_CTRL0_SRC_SEL … #define SPDIFIN_CTRL0_CHK_VALID … #define SPDIFIN_CTRL1 … #define SPDIFIN_CTRL1_BASE_TIMER … #define SPDIFIN_CTRL1_IRQ_MASK … #define SPDIFIN_CTRL2 … #define SPDIFIN_THRES_PER_REG … #define SPDIFIN_THRES_WIDTH … #define SPDIFIN_CTRL3 … #define SPDIFIN_CTRL4 … #define SPDIFIN_TIMER_PER_REG … #define SPDIFIN_TIMER_WIDTH … #define SPDIFIN_CTRL5 … #define SPDIFIN_CTRL6 … #define SPDIFIN_STAT0 … #define SPDIFIN_STAT0_MODE … #define SPDIFIN_STAT0_MAXW … #define SPDIFIN_STAT0_IRQ … #define SPDIFIN_IRQ_MODE_CHANGED … #define SPDIFIN_STAT1 … #define SPDIFIN_STAT2 … #define SPDIFIN_MUTE_VAL … #define SPDIFIN_MODE_NUM … struct axg_spdifin_cfg { … }; struct axg_spdifin { … }; /* * TODO: * It would have been nice to check the actual rate against the sample rate * requested in hw_params(). Unfortunately, I was not able to make the mode * detection and IRQ work reliably: * * 1. IRQs are generated on mode change only, so there is no notification * on transition between no signal and mode 0 (32kHz). * 2. Mode detection very often has glitches, and may detects the * lowest or the highest mode before zeroing in on the actual mode. * * This makes calling snd_pcm_stop() difficult to get right. Even notifying * the kcontrol would be very unreliable at this point. * Let's keep things simple until the magic spell that makes this work is * found. */ static unsigned int axg_spdifin_get_rate(struct axg_spdifin *priv) { … } static int axg_spdifin_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { … } static void axg_spdifin_write_mode_param(struct regmap *map, int mode, unsigned int val, unsigned int num_per_reg, unsigned int base_reg, unsigned int width) { … } static void axg_spdifin_write_timer(struct regmap *map, int mode, unsigned int val) { … } static void axg_spdifin_write_threshold(struct regmap *map, int mode, unsigned int val) { … } static unsigned int axg_spdifin_mode_timer(struct axg_spdifin *priv, int mode, unsigned int rate) { … } static int axg_spdifin_sample_mode_config(struct snd_soc_dai *dai, struct axg_spdifin *priv) { … } static int axg_spdifin_dai_probe(struct snd_soc_dai *dai) { … } static int axg_spdifin_dai_remove(struct snd_soc_dai *dai) { … } static const struct snd_soc_dai_ops axg_spdifin_ops = …; static int axg_spdifin_iec958_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int axg_spdifin_get_status_mask(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int axg_spdifin_get_status(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } #define AXG_SPDIFIN_IEC958_MASK … #define AXG_SPDIFIN_IEC958_STATUS … static const char * const spdifin_chsts_src_texts[] = …; static SOC_ENUM_SINGLE_DECL(axg_spdifin_chsts_src_enum, SPDIFIN_CTRL0, SPDIFIN_CTRL0_STATUS_CH_SHIFT, spdifin_chsts_src_texts); static int axg_spdifin_rate_lock_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int axg_spdifin_rate_lock_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } #define AXG_SPDIFIN_LOCK_RATE(xname) … static const struct snd_kcontrol_new axg_spdifin_controls[] = …; static const struct snd_soc_component_driver axg_spdifin_component_drv = …; static const struct regmap_config axg_spdifin_regmap_cfg = …; static const unsigned int axg_spdifin_mode_rates[SPDIFIN_MODE_NUM] = …; static const struct axg_spdifin_cfg axg_cfg = …; static const struct of_device_id axg_spdifin_of_match[] = …; MODULE_DEVICE_TABLE(of, axg_spdifin_of_match); static struct snd_soc_dai_driver * axg_spdifin_get_dai_drv(struct device *dev, struct axg_spdifin *priv) { … } static int axg_spdifin_probe(struct platform_device *pdev) { … } static struct platform_driver axg_spdifin_pdrv = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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