LXR linux/sound/soc/meson/axg-tdm.h

   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_H
   8#define _MESON_AXG_TDM_H
   9
  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       4
  17#define AXG_TDM_CHANNEL_MAX     128
  18#define AXG_TDM_RATES           (SNDRV_PCM_RATE_5512 |          \
  19                                 SNDRV_PCM_RATE_8000_192000)
  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
  63struct axg_tdm_stream *axg_tdm_stream_alloc(struct axg_tdm_iface *iface);
  64void axg_tdm_stream_free(struct axg_tdm_stream *ts);
  65int axg_tdm_stream_start(struct axg_tdm_stream *ts);
  66void axg_tdm_stream_stop(struct axg_tdm_stream *ts);
  67
  68static inline int axg_tdm_stream_reset(struct axg_tdm_stream *ts)
  69{
  70        axg_tdm_stream_stop(ts);
  71        return axg_tdm_stream_start(ts);
  72}
  73
  74int axg_tdm_set_tdm_slots(struct snd_soc_dai *dai, u32 *tx_mask,
  75                          u32 *rx_mask, unsigned int slots,
  76                          unsigned int slot_width);
  77
  78#endif /* _MESON_AXG_TDM_H */
  79