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
  26 struct 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
  41 static 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
  47 static 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
  52 struct 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
  63 struct axg_tdm_stream *axg_tdm_stream_alloc(struct axg_tdm_iface *iface);
  64 void axg_tdm_stream_free(struct axg_tdm_stream *ts);
  65 int axg_tdm_stream_start(struct axg_tdm_stream *ts);
  66 void axg_tdm_stream_stop(struct axg_tdm_stream *ts);
  67
  68 static 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
  74 int 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 */