LXR linux/sound/soc/mxs/mxs-pcm.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
   4 *
   5 * Based on sound/soc/imx/imx-pcm-dma-mx2.c
   6 */
   7
   8#include <linux/device.h>
   9#include <linux/init.h>
  10#include <linux/module.h>
  11
  12#include <sound/core.h>
  13#include <sound/pcm.h>
  14#include <sound/soc.h>
  15#include <sound/dmaengine_pcm.h>
  16
  17#include "mxs-pcm.h"
  18
  19static const struct snd_pcm_hardware snd_mxs_hardware = {
  20        .info                   = SNDRV_PCM_INFO_MMAP |
  21                                  SNDRV_PCM_INFO_MMAP_VALID |
  22                                  SNDRV_PCM_INFO_PAUSE |
  23                                  SNDRV_PCM_INFO_RESUME |
  24                                  SNDRV_PCM_INFO_INTERLEAVED |
  25                                  SNDRV_PCM_INFO_HALF_DUPLEX,
  26        .period_bytes_min       = 32,
  27        .period_bytes_max       = 8192,
  28        .periods_min            = 1,
  29        .periods_max            = 52,
  30        .buffer_bytes_max       = 64 * 1024,
  31        .fifo_size              = 32,
  32};
  33
  34static const struct snd_dmaengine_pcm_config mxs_dmaengine_pcm_config = {
  35        .pcm_hardware = &snd_mxs_hardware,
  36        .prealloc_buffer_size = 64 * 1024,
  37};
  38
  39int mxs_pcm_platform_register(struct device *dev)
  40{
  41        return devm_snd_dmaengine_pcm_register(dev, &mxs_dmaengine_pcm_config,
  42                SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX);
  43}
  44EXPORT_SYMBOL_GPL(mxs_pcm_platform_register);
  45
  46MODULE_LICENSE("GPL");
  47