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1/* SPDX-License-Identifier: (GPL-2.0 OR MIT)2 *3 * Copyright (c) 2018 Baylibre SAS.4 * Author: Jerome Brunet <jbrunet@baylibre.com>5 */6 7#ifndef _MESON_AXG_TDM_H8#define _MESON_AXG_TDM_H9 10#include <linux/clk.h>11#include <linux/regmap.h>12#include <sound/pcm.h>13#include <sound/soc.h>14#include <sound/soc-dai.h>15 16#define AXG_TDM_NUM_LANES 417#define AXG_TDM_CHANNEL_MAX 12818#define AXG_TDM_RATES (SNDRV_PCM_RATE_5512 | \19 SNDRV_PCM_RATE_8000_768000)20#define AXG_TDM_FORMATS (SNDRV_PCM_FMTBIT_S8 | \21 SNDRV_PCM_FMTBIT_S16_LE | \22 SNDRV_PCM_FMTBIT_S20_LE | \23 SNDRV_PCM_FMTBIT_S24_LE | \24 SNDRV_PCM_FMTBIT_S32_LE)25 26struct axg_tdm_iface {27 struct clk *sclk;28 struct clk *lrclk;29 struct clk *mclk;30 unsigned long mclk_rate;31 32 /* format is common to all the DAIs of the iface */33 unsigned int fmt;34 unsigned int slots;35 unsigned int slot_width;36 37 /* For component wide symmetry */38 int rate;39};40 41static inline bool axg_tdm_lrclk_invert(unsigned int fmt)42{43 return ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S) ^44 !!(fmt & (SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_NB_IF));45}46 47static inline bool axg_tdm_sclk_invert(unsigned int fmt)48{49 return fmt & (SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_IB_NF);50}51 52struct axg_tdm_stream {53 struct axg_tdm_iface *iface;54 struct list_head formatter_list;55 struct mutex lock;56 unsigned int channels;57 unsigned int width;58 unsigned int physical_width;59 u32 *mask;60 bool ready;61 62 /* For continuous clock tracking */63 bool clk_enabled;64};65 66struct axg_tdm_stream *axg_tdm_stream_alloc(struct axg_tdm_iface *iface);67void axg_tdm_stream_free(struct axg_tdm_stream *ts);68int axg_tdm_stream_start(struct axg_tdm_stream *ts);69void axg_tdm_stream_stop(struct axg_tdm_stream *ts);70int axg_tdm_stream_set_cont_clocks(struct axg_tdm_stream *ts,71 unsigned int fmt);72 73static inline int axg_tdm_stream_reset(struct axg_tdm_stream *ts)74{75 axg_tdm_stream_stop(ts);76 return axg_tdm_stream_start(ts);77}78 79int axg_tdm_set_tdm_slots(struct snd_soc_dai *dai, u32 *tx_mask,80 u32 *rx_mask, unsigned int slots,81 unsigned int slot_width);82 83#endif /* _MESON_AXG_TDM_H */84