// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2025 Šerif Rami <ramiserifpersia@gmail.com>

#include "us144mkii.h"

const struct snd_pcm_hardware tascam_pcm_hw = {
    .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
             SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID |
             SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
    .formats = SNDRV_PCM_FMTBIT_S24_3LE,
    .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
              SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000),
    .rate_min = 44100,
    .rate_max = 96000,
    .channels_min = NUM_CHANNELS,
    .channels_max = NUM_CHANNELS,
    .buffer_bytes_max = 1024 * 1024,
    .period_bytes_min = 48 * BYTES_PER_FRAME,
    .period_bytes_max = 1024 * BYTES_PER_FRAME,
    .periods_min = 2,
    .periods_max = 1024,
};

int tascam_pcm_hw_params(struct snd_pcm_substream *substream,
                         struct snd_pcm_hw_params *params) {
  return 0;
}

int tascam_pcm_hw_free(struct snd_pcm_substream *substream) { return 0; }

int tascam_pcm_trigger(struct snd_pcm_substream *substream, int cmd) {
  struct tascam_card *tascam = snd_pcm_substream_chip(substream);
  int err = 0;

  guard(spinlock_irqsave)(&tascam->lock);
  switch (cmd) {
  case SNDRV_PCM_TRIGGER_START:
  case SNDRV_PCM_TRIGGER_RESUME:
    if (!atomic_read(&tascam->playback_active)) {
      atomic_set(&tascam->playback_active, 1);
      atomic_set(&tascam->capture_active, 1);
    }
    break;
  case SNDRV_PCM_TRIGGER_STOP:
  case SNDRV_PCM_TRIGGER_SUSPEND:
  case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
    if (atomic_read(&tascam->playback_active)) {
      atomic_set(&tascam->playback_active, 0);
      atomic_set(&tascam->capture_active, 0);
    }
    break;
  default:
    err = -EINVAL;
    break;
  }

  return err;
}

int tascam_init_pcm(struct snd_pcm *pcm) {
  struct tascam_card *tascam = pcm->private_data;

  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &tascam_playback_ops);
  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &tascam_capture_ops);

  snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
                                 tascam->dev->dev.parent, 64 * 1024,
                                 tascam_pcm_hw.buffer_bytes_max);

  return 0;
}