pinebuds/platform/hal/hal_i2s.c

/***************************************************************************
 *
 * Copyright 2015-2019 BES.
 * All rights reserved. All unpublished rights reserved.
 *
 * No part of this work may be used or reproduced in any form or by any
 * means, or stored in a database or retrieval system, without prior written
 * permission of BES.
 *
 * Use of this work is governed by a license granted by BES.
 * This work contains confidential and proprietary information of
 * BES. which is protected by copyright, trade secret,
 * trademark and other intellectual property rights.
 *
 ****************************************************************************/
#include "hal_i2s.h"
#include "hal_cmu.h"
#include "hal_i2sip.h"
#include "hal_iomux.h"
#include "plat_addr_map.h"
#include "plat_types.h"
#include "reg_i2sip.h"
#if !defined(CHIP_BEST1000) && defined(I2S_MCLK_FROM_SPDIF)
#include "hal_spdif.h"
#endif
#include "analog.h"
#include "cmsis.h"
#include "hal_timer.h"
#include "hal_trace.h"

// Trigger DMA request when TX-FIFO count <= threshold
#define HAL_I2S_TX_FIFO_TRIGGER_LEVEL (I2SIP_FIFO_DEPTH / 2)
// Trigger DMA request when RX-FIFO count >= threshold
#define HAL_I2S_RX_FIFO_TRIGGER_LEVEL (I2SIP_FIFO_DEPTH / 2)

#define HAL_I2S_YES 1
#define HAL_I2S_NO 0

#ifdef CHIP_BEST1000
#define I2S_CMU_DIV CODEC_PLL_DIV
#define I2S_CHAN_NUM 1
#else
#define I2S_CMU_DIV CODEC_CMU_DIV
#define I2S_CHAN_NUM 4
#endif

#ifndef I2S_MCLK_DIV
#define I2S_MCLK_DIV 2
#endif

enum HAL_I2S_STATUS_T {
  HAL_I2S_STATUS_NULL,
  HAL_I2S_STATUS_OPENED,
  HAL_I2S_STATUS_STARTED,
};

struct I2S_SAMPLE_RATE_T {
  enum AUD_SAMPRATE_T sample_rate;
  uint32_t codec_freq;
  uint8_t codec_div;
  uint8_t cmu_div;
};

struct HAL_I2S_MOD_NAME_T {
  enum HAL_CMU_MOD_ID_T mod;
  enum HAL_CMU_MOD_ID_T apb;
};

static const struct I2S_SAMPLE_RATE_T i2s_sample_rate[] = {
    {AUD_SAMPRATE_8000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_16000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_32000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_44100, CODEC_FREQ_44_1K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_48000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_64000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_96000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_128000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_256000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_176400, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_192000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_352800, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_384000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_512000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_705600, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_768000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
    {AUD_SAMPRATE_1024000, CODEC_FREQ_48K_SERIES, CODEC_PLL_DIV, I2S_CMU_DIV},
};

static const char *const invalid_id = "Invalid I2S ID: %d\n";
// static const char * const invalid_ch = "Invalid I2S CH: %d\n";

static enum HAL_I2S_STATUS_T i2s_status[HAL_I2S_ID_QTY][AUD_STREAM_NUM];
static enum HAL_I2S_MODE_T i2s_mode[HAL_I2S_ID_QTY];
static bool i2s_dma[HAL_I2S_ID_QTY][AUD_STREAM_NUM];
static bool sync_start[HAL_I2S_ID_QTY][AUD_STREAM_NUM];
#ifdef CHIP_BEST2000
static uint8_t i2s_rx_line_map[HAL_I2S_ID_QTY];
STATIC_ASSERT(sizeof(i2s_rx_line_map) * 8 >= I2S_CHAN_NUM,
              "i2s_rx_line_map size too small");
#endif

static const struct HAL_I2S_MOD_NAME_T i2s_mod[HAL_I2S_ID_QTY] = {
    {
        .mod = HAL_CMU_MOD_O_I2S0,
        .apb = HAL_CMU_MOD_P_I2S0,
    },
#if defined(CHIP_HAS_I2S) && (CHIP_HAS_I2S > 1)
    {
        .mod = HAL_CMU_MOD_O_I2S1,
        .apb = HAL_CMU_MOD_P_I2S1,
    },
#endif
};

static inline uint32_t _i2s_get_reg_base(enum HAL_I2S_ID_T id) {
  ASSERT(id < HAL_I2S_ID_QTY, invalid_id, id);
  switch (id) {
  case HAL_I2S_ID_0:
    return I2S0_BASE;
    break;
#if defined(CHIP_HAS_I2S) && (CHIP_HAS_I2S > 1)
  case HAL_I2S_ID_1:
    return I2S1_BASE;
    break;
#endif
  default:
    break;
  }
  return 0;
}

static int hal_i2s_master_stream_closed(void) {
  enum HAL_I2S_ID_T id;

  for (id = HAL_I2S_ID_0; id < HAL_I2S_ID_QTY; id++) {
    if (i2s_status[id][AUD_STREAM_PLAYBACK] != HAL_I2S_STATUS_NULL ||
        i2s_status[id][AUD_STREAM_CAPTURE] != HAL_I2S_STATUS_NULL) {
      if (i2s_mode[id] == HAL_I2S_MODE_MASTER) {
        return false;
      }
    }
  }

  return true;
}

int hal_i2s_open(enum HAL_I2S_ID_T id, enum AUD_STREAM_T stream,
                 enum HAL_I2S_MODE_T mode) {
  uint32_t reg_base;

  reg_base = _i2s_get_reg_base(id);

  ASSERT(mode == HAL_I2S_MODE_MASTER || mode == HAL_I2S_MODE_SLAVE,
         "Invalid I2S mode for stream %d: %d", stream, mode);
  ASSERT(i2s_mode[id] == HAL_I2S_MODE_NULL || i2s_mode[id] == mode,
         "Incompatible I2S mode for stream %d: prev=%d cur=%d", stream,
         i2s_mode[id], mode);

  if (i2s_status[id][stream] != HAL_I2S_STATUS_NULL) {
    TRACE(2, "Invalid I2S opening status for stream %d: %d", stream,
          i2s_status[id][stream]);
    return 1;
  }

  if (i2s_status[id][AUD_STREAM_PLAYBACK] == HAL_I2S_STATUS_NULL &&
      i2s_status[id][AUD_STREAM_CAPTURE] == HAL_I2S_STATUS_NULL) {
    if (mode == HAL_I2S_MODE_MASTER) {
#ifndef SIMU
      if (hal_i2s_master_stream_closed()) {
        analog_aud_pll_open(ANA_AUD_PLL_USER_I2S);
      }
#endif
      hal_cmu_i2s_clock_enable(id);
    }

    if (id == HAL_I2S_ID_0) {
      hal_iomux_set_i2s0();
#if defined(CHIP_HAS_I2S) && (CHIP_HAS_I2S > 1)
    } else {
      hal_iomux_set_i2s1();
#endif
    }

    hal_cmu_clock_enable(i2s_mod[id].mod);
    hal_cmu_clock_enable(i2s_mod[id].apb);
    hal_cmu_reset_clear(i2s_mod[id].mod);
    hal_cmu_reset_clear(i2s_mod[id].apb);
    i2sip_w_enable_i2sip(reg_base, HAL_I2S_YES);

    for (int i = 0; i < I2S_CHAN_NUM; i++) {
      i2sip_w_enable_rx_channel(reg_base, i, HAL_I2S_NO);
      i2sip_w_enable_tx_channel(reg_base, i, HAL_I2S_NO);
      i2sip_w_rx_fifo_reset(reg_base, i);
      i2sip_w_tx_fifo_reset(reg_base, i);
    }

#ifndef CHIP_BEST1000
    if (mode == HAL_I2S_MODE_MASTER) {
      i2sip_w_enable_slave_mode(reg_base, HAL_I2S_NO);
    } else {
      i2sip_w_enable_slave_mode(reg_base, HAL_I2S_YES);
    }
#endif

    if (mode == HAL_I2S_MODE_MASTER) {
      hal_cmu_i2s_set_master_mode(id);
    } else {
      hal_cmu_i2s_set_slave_mode(id);
    }

    i2s_mode[id] = mode;
  }

  i2s_dma[id][stream] = false;
  i2s_status[id][stream] = HAL_I2S_STATUS_OPENED;

  return 0;
}

int hal_i2s_close(enum HAL_I2S_ID_T id, enum AUD_STREAM_T stream) {
  uint32_t reg_base;

  reg_base = _i2s_get_reg_base(id);

  if (i2s_status[id][stream] != HAL_I2S_STATUS_OPENED) {
    TRACE(2, "Invalid I2S closing status for stream %d: %d", stream,
          i2s_status[id][stream]);
    return 1;
  }

  i2s_status[id][stream] = HAL_I2S_STATUS_NULL;

  if (i2s_status[id][AUD_STREAM_PLAYBACK] == HAL_I2S_STATUS_NULL &&
      i2s_status[id][AUD_STREAM_CAPTURE] == HAL_I2S_STATUS_NULL) {
    i2sip_w_enable_i2sip(reg_base, HAL_I2S_NO);
    hal_cmu_reset_set(i2s_mod[id].apb);
    hal_cmu_reset_set(i2s_mod[id].mod);
    hal_cmu_clock_disable(i2s_mod[id].apb);
    hal_cmu_clock_disable(i2s_mod[id].mod);

    if (i2s_mode[id] == HAL_I2S_MODE_MASTER) {
      hal_cmu_i2s_clock_disable(id);
      if (hal_i2s_master_stream_closed()) {
#if !defined(CHIP_BEST1000) && defined(I2S_MCLK_FROM_SPDIF)
        hal_cmu_clock_out_disable();
        hal_spdif_clock_out_disable(HAL_SPDIF_ID_0);
#endif
#ifndef SIMU
        analog_aud_pll_close(ANA_AUD_PLL_USER_I2S);
#endif
      }
    }

    i2s_mode[id] = HAL_I2S_MODE_NULL;
  }

  return 0;
}

#ifdef AF_ADC_I2S_SYNC
static bool _hal_i2s_enable_delay[HAL_I2S_ID_QTY];

void hal_i2s_enable_delay(enum HAL_I2S_ID_T id) {
  _hal_i2s_enable_delay[id] = true;
}

void hal_i2s_disable_delay(enum HAL_I2S_ID_T id) {
  _hal_i2s_enable_delay[id] = false;
}

void hal_i2s_enable(enum HAL_I2S_ID_T id) {
  i2sip_w_enable_clk_gen(_i2s_get_reg_base(id), HAL_I2S_YES);
}
#endif

int hal_i2s_start_stream(enum HAL_I2S_ID_T id, enum AUD_STREAM_T stream) {
  uint32_t reg_base;
  uint32_t lock;
  bool xfer_en[AUD_STREAM_NUM];

  reg_base = _i2s_get_reg_base(id);

  if (i2s_status[id][stream] != HAL_I2S_STATUS_OPENED) {
    TRACE(2, "Invalid I2S starting status for stream %d: %d", stream,
          i2s_status[id][stream]);
    return 1;
  }

  if (i2s_mode[id] == HAL_I2S_MODE_SLAVE && sync_start[id][stream]) {
    xfer_en[stream] = false;
    xfer_en[!stream] = false;
  } else {
    xfer_en[stream] = true;
    if (i2s_mode[id] == HAL_I2S_MODE_SLAVE &&
        i2s_status[id][!stream] == HAL_I2S_STATUS_STARTED &&
        sync_start[id][!stream]) {
      xfer_en[!stream] = true;
    } else {
      xfer_en[!stream] = false;
    }
  }

  if (stream == AUD_STREAM_PLAYBACK) {
    lock = int_lock();
    i2sip_w_enable_tx_channel(reg_base, 0, HAL_I2S_YES);
    if (xfer_en[stream]) {
      i2sip_w_enable_tx_block(reg_base, HAL_I2S_YES);
      if (i2s_dma[id][stream]) {
        i2sip_w_enable_tx_dma(reg_base, HAL_I2S_YES);
      }
    }
    if (xfer_en[!stream]) {
      i2sip_w_enable_rx_block(reg_base, HAL_I2S_YES);
    }
    int_unlock(lock);
    if (i2s_dma[id][stream] && i2s_mode[id] == HAL_I2S_MODE_MASTER) {
      // Delay a little time for DMA to fill the TX FIFO before sending
      // (enabling clk gen)
      for (volatile int i = 0; i < 50; i++)
        ;
    }
  } else {
    if (i2s_dma[id][stream]) {
      i2sip_w_enable_rx_dma(reg_base, HAL_I2S_YES);
    }
#ifdef CHIP_BEST2000
    int i;
    for (i = 0; i < I2S_CHAN_NUM; i++) {
      if (i2s_rx_line_map[id] & (1 << i)) {
        i2sip_w_enable_rx_channel(reg_base, i, HAL_I2S_YES);
      }
    }
#else
    i2sip_w_enable_rx_channel(reg_base, 0, HAL_I2S_YES);
#endif
    lock = int_lock();
    if (xfer_en[stream]) {
      i2sip_w_enable_rx_block(reg_base, HAL_I2S_YES);
    }
    if (xfer_en[!stream]) {
      i2sip_w_enable_tx_block(reg_base, HAL_I2S_YES);
      if (i2s_dma[id][!stream]) {
        i2sip_w_enable_tx_dma(reg_base, HAL_I2S_YES);
      }
    }
    int_unlock(lock);
  }

  if (i2s_mode[id] == HAL_I2S_MODE_MASTER && !sync_start[id][stream]) {
    if (i2sip_r_clk_gen_enabled(reg_base) == 0) {
      hal_cmu_i2s_clock_out_enable(id);
#ifdef AF_ADC_I2S_SYNC
      if (_hal_i2s_enable_delay[id]) {
        _hal_i2s_enable_delay[id] = false;
      } else {
        hal_i2s_enable(id);
      }
#else
      i2sip_w_enable_clk_gen(reg_base, HAL_I2S_YES);
#endif
    }
  }

  i2s_status[id][stream] = HAL_I2S_STATUS_STARTED;

  return 0;
}

int hal_i2s_stop_stream(enum HAL_I2S_ID_T id, enum AUD_STREAM_T stream) {
  uint32_t reg_base;

  reg_base = _i2s_get_reg_base(id);

  if (i2s_status[id][stream] != HAL_I2S_STATUS_STARTED) {
    TRACE(2, "Invalid I2S stopping status for stream %d: %d", stream,
          i2s_status[id][stream]);
    return 1;
  }

  i2s_status[id][stream] = HAL_I2S_STATUS_OPENED;

  if (i2s_status[id][AUD_STREAM_PLAYBACK] != HAL_I2S_STATUS_STARTED &&
      i2s_status[id][AUD_STREAM_CAPTURE] != HAL_I2S_STATUS_STARTED) {
    if (i2s_mode[id] == HAL_I2S_MODE_MASTER) {
      hal_cmu_i2s_clock_out_disable(id);
      i2sip_w_enable_clk_gen(reg_base, HAL_I2S_NO);
#ifdef AF_ADC_I2S_SYNC
      _hal_i2s_enable_delay[id] = false;
#endif
    }
  }

  if (stream == AUD_STREAM_PLAYBACK) {
    i2sip_w_enable_tx_block(reg_base, HAL_I2S_NO);
    i2sip_w_enable_tx_channel(reg_base, 0, HAL_I2S_NO);
    i2sip_w_enable_tx_dma(reg_base, HAL_I2S_NO);
    i2sip_w_tx_fifo_reset(reg_base, 0);
  } else {
    i2sip_w_enable_rx_block(reg_base, HAL_I2S_NO);
    i2sip_w_enable_rx_dma(reg_base, HAL_I2S_NO);
#ifdef CHIP_BEST1000
    i2sip_w_enable_rx_channel(reg_base, 0, HAL_I2S_NO);
    i2sip_w_rx_fifo_reset(reg_base, 0);
#else
    int i;
    for (i = 0; i < I2S_CHAN_NUM; i++) {
      i2sip_w_enable_rx_channel(reg_base, i, HAL_I2S_NO);
      i2sip_w_rx_fifo_reset(reg_base, i);
    }
#endif
  }

  return 0;
}

int hal_i2s_setup_stream(enum HAL_I2S_ID_T id, enum AUD_STREAM_T stream,
                         const struct HAL_I2S_CONFIG_T *cfg) {
  uint32_t reg_base;
  uint32_t div = 0;
  uint8_t cycles;
  uint8_t resolution = 0, word_sclk = 0;
  bool valid;
  int POSSIBLY_UNUSED i;

  reg_base = _i2s_get_reg_base(id);

  if (i2s_status[id][stream] != HAL_I2S_STATUS_OPENED) {
    TRACE(2, "Invalid I2S setup status for stream %d: %d", stream,
          i2s_status[id][stream]);
    return 1;
  }

  cycles = cfg->cycles;
  if (cycles == 0) {
    if (cfg->bits <= AUD_BITS_16) {
      cycles = 16;
    } else {
      cycles = 32;
    }
  }
  ASSERT(cycles >= cfg->bits, "I2S cycles (%u) should >= bits (%u)", cycles,
         cfg->bits);

  switch (cycles) {
  case 16:
    word_sclk = I2SIP_CLK_CFG_WSS_VAL_16CYCLE;
    break;
  case 24:
    word_sclk = I2SIP_CLK_CFG_WSS_VAL_24CYCLE;
    break;
  case 32:
    word_sclk = I2SIP_CLK_CFG_WSS_VAL_32CYCLE;
    break;
  default:
    ASSERT(false, "Bad I2S cycles (%u)", cycles);
    return 1;
  }

  switch (cfg->bits) {
  case AUD_BITS_8:
    resolution = I2SIP_CFG_WLEN_VAL_IGNORE;
    break;
  case AUD_BITS_12:
    resolution = I2SIP_CFG_WLEN_VAL_12BIT;
    break;
  case AUD_BITS_16:
    resolution = I2SIP_CFG_WLEN_VAL_16BIT;
    break;
  case AUD_BITS_20:
    resolution = I2SIP_CFG_WLEN_VAL_20BIT;
    break;
  case AUD_BITS_24:
    resolution = I2SIP_CFG_WLEN_VAL_24BIT;
    break;
  case AUD_BITS_32:
    resolution = I2SIP_CFG_WLEN_VAL_32BIT;
    break;
  default:
    ASSERT(false, "Bad I2S bits (%u)", cfg->bits);
    return 1;
  }

  /* word clock width : how many sclk work sclk count*/
  /* sclk gate in word clock : how many sclk gate : fixed no gate */
  i2sip_w_clk_cfg_reg(reg_base, (word_sclk << I2SIP_CLK_CFG_WSS_SHIFT) |
                                    (I2SIP_CLK_CFG_SCLK_GATE_VAL_NO_GATE
                                     << I2SIP_CLK_CFG_SCLK_GATE_SHIFT));

#ifdef CHIP_BEST2000
  if (stream == AUD_STREAM_PLAYBACK) {
    valid = (cfg->channel_num == AUD_CHANNEL_NUM_2);
  } else {
    valid = (cfg->channel_num == AUD_CHANNEL_NUM_2 ||
             cfg->channel_num == AUD_CHANNEL_NUM_4 ||
             cfg->channel_num == AUD_CHANNEL_NUM_6 ||
             cfg->channel_num == AUD_CHANNEL_NUM_8);
  }
#else
  valid = (cfg->channel_num == AUD_CHANNEL_NUM_2);
#endif
  ASSERT(valid, "[%s] Stream %d Channel number(%d) error", __func__, stream,
         cfg->channel_num);

  if (i2s_mode[id] == HAL_I2S_MODE_MASTER) {

    uint32_t i2s_clock;
    uint32_t bit_rate;

    for (i = 0; i < ARRAY_SIZE(i2s_sample_rate); i++) {
      if (i2s_sample_rate[i].sample_rate == cfg->sample_rate) {
        break;
      }
    }
    ASSERT(i < ARRAY_SIZE(i2s_sample_rate), "%s: Invalid i2s sample rate: %d",
           __func__, cfg->sample_rate);

    TRACE(3, "[%s] stream=%d sample_rate=%d", __func__, stream,
          cfg->sample_rate);

    ASSERT(i2s_sample_rate[i].codec_div / i2s_sample_rate[i].cmu_div *
                   i2s_sample_rate[i].cmu_div ==
               i2s_sample_rate[i].codec_div,
           "%s: Invalid codec div for rate %u: codec_div=%u cmu_div=%u",
           __func__, cfg->sample_rate, i2s_sample_rate[i].codec_div,
           i2s_sample_rate[i].cmu_div);

#ifndef SIMU
    analog_aud_freq_pll_config(i2s_sample_rate[i].codec_freq,
                               i2s_sample_rate[i].codec_div);
#ifdef CHIP_BEST2000
    analog_aud_pll_set_dig_div(i2s_sample_rate[i].codec_div /
                               i2s_sample_rate[i].cmu_div);
#endif
#endif

    i2s_clock = i2s_sample_rate[i].codec_freq * i2s_sample_rate[i].cmu_div;
    bit_rate = i2s_sample_rate[i].sample_rate * AUD_CHANNEL_NUM_2 * cycles;
    div = i2s_clock / bit_rate;

    ASSERT(
        i2s_clock == bit_rate * div,
        "%s: Bad stream cfg (bad cycles?): i2s_clock=%u bit_rate=%u cycles=%u",
        __func__, i2s_clock, bit_rate, cycles);

#if !defined(CHIP_BEST1000) && defined(I2S_MCLK_FROM_SPDIF)
#ifdef I2S_MCLK_PIN
    hal_iomux_set_i2s_mclk();
    hal_cmu_i2s_mclk_enable(HAL_CMU_I2S_MCLK_PLLSPDIF0);
#else
    hal_iomux_set_clock_out();
    hal_cmu_clock_out_enable(HAL_CMU_CLOCK_OUT_MCU_SPDIF0);
#endif
    // By default MCLK is half of (CODEC_FREQ_24P576M or CODEC_FREQ_22P5792M)
    hal_spdif_clock_out_enable(HAL_SPDIF_ID_0,
                               i2s_sample_rate[i].cmu_div * I2S_MCLK_DIV);
#endif

    hal_cmu_i2s_set_div(id, div);
  }

  if ((stream == AUD_STREAM_PLAYBACK &&
       i2s_status[id][AUD_STREAM_CAPTURE] == HAL_I2S_STATUS_NULL) ||
      (stream == AUD_STREAM_CAPTURE &&
       i2s_status[id][AUD_STREAM_PLAYBACK] == HAL_I2S_STATUS_NULL)) {
    hal_cmu_reset_pulse(i2s_mod[id].mod);
  }

  i2s_dma[id][stream] = cfg->use_dma;
  sync_start[id][stream] = cfg->sync_start;

  if (stream == AUD_STREAM_PLAYBACK) {
    /* resolution : valid bit width */
    i2sip_w_tx_resolution(reg_base, 0, resolution);

    /* fifo level to trigger empty interrupt or dma req */
    i2sip_w_tx_fifo_threshold(reg_base, 0, HAL_I2S_TX_FIFO_TRIGGER_LEVEL);
  } else {
#ifdef CHIP_BEST2000
    uint32_t ch;
    uint32_t cnt = 0;

    i2s_rx_line_map[id] = 0;

    for (i = 0; i < I2S_CHAN_NUM; i++) {
      ch = (cfg->channel_map >> (i * 2)) & 3;
      ASSERT(ch == 0 || ch == 3, "[%s] Stream %d Bad Chan Map 0x%04X", __func__,
             stream, cfg->channel_map);
      if (ch == 3) {
        i2s_rx_line_map[id] |= (1 << i);
        cnt += 2;
      }
    }
    ASSERT(cnt == cfg->channel_num,
           "[%s] Stream %d Unmatched Chan Num (%u) and Map (0x%04X)", __func__,
           stream, cfg->channel_num, cfg->channel_map);

    if (cfg->chan_sep_buf) {
      i2sip_w_rx_dma_blk_size(reg_base, HAL_I2S_RX_FIFO_TRIGGER_LEVEL);
      i2sp_w_enable_rx_dma_block(reg_base, HAL_I2S_YES);
    } else {
      i2sp_w_enable_rx_dma_block(reg_base, HAL_I2S_NO);
    }

    for (i = 0; i < I2S_CHAN_NUM; i++) {
      if (i2s_rx_line_map[id] & (1 << i)) {
        i2sip_w_rx_resolution(reg_base, i, resolution);
        i2sip_w_rx_fifo_threshold(reg_base, i, HAL_I2S_RX_FIFO_TRIGGER_LEVEL);
      }
    }
#else
    /* resolution : valid bit width */
    i2sip_w_rx_resolution(reg_base, 0, resolution);

    /* fifo level to trigger empty interrupt or dma req */
    i2sip_w_rx_fifo_threshold(reg_base, 0, HAL_I2S_RX_FIFO_TRIGGER_LEVEL);
#endif
  }

  return 0;
}

int hal_i2s_send(enum HAL_I2S_ID_T id, const uint8_t *value,
                 uint32_t value_len) {
  uint32_t i = 0;
  uint32_t reg_base;

  reg_base = _i2s_get_reg_base(id);

  for (i = 0; i < value_len; i += 4) {
    while (!(i2sip_r_int_status(reg_base, 0) &
             I2SIP_INT_STATUS_TX_FIFO_EMPTY_MASK))
      ;

    i2sip_w_tx_left_fifo(reg_base, 0, value[i + 1] << 8 | value[i]);
    i2sip_w_tx_right_fifo(reg_base, 0, value[i + 3] << 8 | value[i + 2]);
  }

  return 0;
}
uint8_t hal_i2s_recv(enum HAL_I2S_ID_T id, uint8_t *value, uint32_t value_len) {
  // uint32_t reg_base;

  // reg_base = _i2s_get_reg_base(id);

  return 0;
}

//================================================================================
// I2S Packet Mode
//================================================================================

static bool i2s_pkt_opened = false;

int hal_i2s_packet_open(void) {
  uint32_t reg_base;
  uint8_t resolution = 0, word_sclk = 0;

  if (i2s_pkt_opened) {
    return 1;
  }

  word_sclk = I2SIP_CLK_CFG_WSS_VAL_32CYCLE;
  resolution = I2SIP_CFG_WLEN_VAL_32BIT;

  reg_base = _i2s_get_reg_base(HAL_I2S_ID_0);

  hal_iomux_set_i2s0();
  hal_cmu_i2s_clock_enable(HAL_I2S_ID_0);
  hal_cmu_clock_enable(i2s_mod[HAL_I2S_ID_0].mod);
  hal_cmu_clock_enable(i2s_mod[HAL_I2S_ID_0].apb);
  hal_cmu_reset_clear(i2s_mod[HAL_I2S_ID_0].mod);
  hal_cmu_reset_clear(i2s_mod[HAL_I2S_ID_0].apb);
  i2sip_w_enable_i2sip(reg_base, HAL_I2S_YES);

  for (int i = 0; i < I2S_CHAN_NUM; i++) {
    i2sip_w_enable_rx_channel(reg_base, i, HAL_I2S_NO);
    i2sip_w_enable_tx_channel(reg_base, i, HAL_I2S_NO);
  }

  hal_cmu_i2s_set_slave_mode(HAL_I2S_ID_0);
#ifndef CHIP_BEST1000
  i2sip_w_enable_slave_mode(reg_base, HAL_I2S_YES);
#endif

  /* word clock width : how many sclk work sclk count*/
  /* sclk gate in word clock : how many sclk gate : fixed no gate */
  i2sip_w_clk_cfg_reg(reg_base, (word_sclk << I2SIP_CLK_CFG_WSS_SHIFT) |
                                    (I2SIP_CLK_CFG_SCLK_GATE_VAL_NO_GATE
                                     << I2SIP_CLK_CFG_SCLK_GATE_SHIFT));

  i2sip_w_tx_resolution(reg_base, 0, resolution);
  i2sip_w_tx_fifo_threshold(reg_base, 0, HAL_I2S_TX_FIFO_TRIGGER_LEVEL);
  i2sip_w_rx_resolution(reg_base, 0, resolution);
  i2sip_w_rx_fifo_threshold(reg_base, 0, HAL_I2S_RX_FIFO_TRIGGER_LEVEL);

  i2s_pkt_opened = true;

  return 0;
}

int hal_i2s_packet_close(void) {
  uint32_t reg_base;

  if (!i2s_pkt_opened) {
    return 1;
  }

  reg_base = _i2s_get_reg_base(HAL_I2S_ID_0);

  i2sip_w_enable_i2sip(reg_base, HAL_I2S_NO);
  hal_cmu_reset_set(i2s_mod[HAL_I2S_ID_0].apb);
  hal_cmu_reset_set(i2s_mod[HAL_I2S_ID_0].mod);
  hal_cmu_clock_disable(i2s_mod[HAL_I2S_ID_0].apb);
  hal_cmu_clock_disable(i2s_mod[HAL_I2S_ID_0].mod);
  hal_cmu_i2s_clock_disable(HAL_I2S_ID_0);

  i2s_pkt_opened = false;

  return 0;
}

int hal_i2s_start_transfer(void) {
  uint32_t reg_base;

  if (!i2s_pkt_opened) {
    return 1;
  }

  hal_cmu_reset_pulse(i2s_mod[HAL_I2S_ID_0].mod);

  reg_base = _i2s_get_reg_base(HAL_I2S_ID_0);

  i2sip_w_enable_tx_channel(reg_base, 0, HAL_I2S_YES);
  i2sip_w_enable_tx_dma(reg_base, HAL_I2S_YES);
  i2sip_w_enable_tx_block(reg_base, HAL_I2S_YES);

  i2sip_w_enable_rx_channel(reg_base, 0, HAL_I2S_YES);
  i2sip_w_enable_rx_dma(reg_base, HAL_I2S_YES);
  i2sip_w_enable_rx_block(reg_base, HAL_I2S_YES);

  return 0;
}

int hal_i2s_stop_transfer(void) {
  uint32_t reg_base;

  if (!i2s_pkt_opened) {
    return 1;
  }

  reg_base = _i2s_get_reg_base(HAL_I2S_ID_0);

  i2sip_w_enable_tx_block(reg_base, HAL_I2S_NO);
  i2sip_w_enable_tx_channel(reg_base, 0, HAL_I2S_NO);
  i2sip_w_enable_tx_dma(reg_base, HAL_I2S_NO);
  i2sip_w_tx_fifo_reset(reg_base, 0);

  i2sip_w_enable_rx_block(reg_base, HAL_I2S_NO);
  i2sip_w_enable_rx_channel(reg_base, 0, HAL_I2S_NO);
  i2sip_w_enable_rx_dma(reg_base, HAL_I2S_NO);
  i2sip_w_rx_fifo_reset(reg_base, 0);

  return 0;
}

void hal_i2s_tx_sync_enable(enum HAL_I2S_SYNC_TYPE_T type) {
  uint32_t reg_base = _i2s_get_reg_base(HAL_I2S_ID_0);
  i2sip_w_tx_sync_enable(reg_base, type);
}

void hal_i2s_tx_sync_disable(void) {
  uint32_t reg_base = _i2s_get_reg_base(HAL_I2S_ID_0);
  i2sip_w_tx_sync_disable(reg_base);
}

void hal_i2s_rx_sync_enable(enum HAL_I2S_SYNC_TYPE_T type) {
  uint32_t reg_base = _i2s_get_reg_base(HAL_I2S_ID_0);
  i2sip_w_rx_sync_enable(reg_base, type);
}

void hal_i2s_rx_sync_disable(void) {
  uint32_t reg_base = _i2s_get_reg_base(HAL_I2S_ID_0);
  i2sip_w_rx_sync_disable(reg_base);
}

void hal_i2s_clk_sync_enable(enum HAL_I2S_SYNC_TYPE_T type) {
  uint32_t reg_base = _i2s_get_reg_base(HAL_I2S_ID_0);
  i2sip_w_clk_sync_enable(reg_base, type);
}

void hal_i2s_clk_sync_disable(void) {
  uint32_t reg_base = _i2s_get_reg_base(HAL_I2S_ID_0);
  i2sip_w_clk_sync_disable(reg_base);
}