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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/soc/meson/axg-tdm.h
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/* SPDX-License-Identifier: (GPL-2.0 OR MIT)

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 *

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 * Copyright (c) 2018 Baylibre SAS.

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 * Author: Jerome Brunet <[email protected]>

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 */

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#ifndef _MESON_AXG_TDM_H

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#define _MESON_AXG_TDM_H

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#include <linux/clk.h>

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#include <linux/regmap.h>

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#include <sound/pcm.h>

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#include <sound/soc.h>

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#include <sound/soc-dai.h>

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#define AXG_TDM_NUM_LANES	4

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#define AXG_TDM_CHANNEL_MAX	128

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#define AXG_TDM_FORMATS		(SNDRV_PCM_FMTBIT_S8 |		\

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				 SNDRV_PCM_FMTBIT_S16_LE |	\

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				 SNDRV_PCM_FMTBIT_S20_LE |	\

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				 SNDRV_PCM_FMTBIT_S24_LE |	\

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				 SNDRV_PCM_FMTBIT_S32_LE)

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struct axg_tdm_iface {

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	struct clk *sclk;

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	struct clk *lrclk;

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	struct clk *mclk;

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	unsigned long mclk_rate;

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	/* format is common to all the DAIs of the iface */

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	unsigned int fmt;

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	unsigned int slots;

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	unsigned int slot_width;

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	/* For component wide symmetry */

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	int rate;

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};

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static inline bool axg_tdm_lrclk_invert(unsigned int fmt)

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{

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	return ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S) ^

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		!!(fmt & (SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_NB_IF));

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}

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static inline bool axg_tdm_sclk_invert(unsigned int fmt)

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{

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	return fmt & (SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_IB_NF);

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}

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struct axg_tdm_stream {

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	struct axg_tdm_iface *iface;

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	struct list_head formatter_list;

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	struct mutex lock;

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	unsigned int channels;

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	unsigned int width;

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	unsigned int physical_width;

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	u32 *mask;

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	bool ready;

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	/* For continuous clock tracking */

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	bool clk_enabled;

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};

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struct axg_tdm_stream *axg_tdm_stream_alloc(struct axg_tdm_iface *iface);

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void axg_tdm_stream_free(struct axg_tdm_stream *ts);

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int axg_tdm_stream_start(struct axg_tdm_stream *ts);

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void axg_tdm_stream_stop(struct axg_tdm_stream *ts);

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int axg_tdm_stream_set_cont_clocks(struct axg_tdm_stream *ts,

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				   unsigned int fmt);

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static inline int axg_tdm_stream_reset(struct axg_tdm_stream *ts)

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{

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	axg_tdm_stream_stop(ts);

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	return axg_tdm_stream_start(ts);

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}

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int axg_tdm_set_tdm_slots(struct snd_soc_dai *dai, u32 *tx_mask,

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			  u32 *rx_mask, unsigned int slots,

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			  unsigned int slot_width);

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#endif /* _MESON_AXG_TDM_H */

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