LXR linux/sound/soc/ti/udma-pcm.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 *  Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com
   4 *  Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
   5 */
   6
   7#include <linux/module.h>
   8#include <sound/core.h>
   9#include <sound/pcm.h>
  10#include <sound/pcm_params.h>
  11#include <sound/soc.h>
  12#include <sound/dmaengine_pcm.h>
  13
  14#include "udma-pcm.h"
  15
  16static const struct snd_pcm_hardware udma_pcm_hardware = {
  17        .info                   = SNDRV_PCM_INFO_MMAP |
  18                                  SNDRV_PCM_INFO_MMAP_VALID |
  19                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
  20                                  SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
  21                                  SNDRV_PCM_INFO_INTERLEAVED,
  22        .buffer_bytes_max       = SIZE_MAX,
  23        .period_bytes_min       = 32,
  24        .period_bytes_max       = SZ_64K,
  25        .periods_min            = 2,
  26        .periods_max            = UINT_MAX,
  27};
  28
  29static const struct snd_dmaengine_pcm_config udma_dmaengine_pcm_config = {
  30        .pcm_hardware = &udma_pcm_hardware,
  31        .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
  32};
  33
  34int udma_pcm_platform_register(struct device *dev)
  35{
  36        return devm_snd_dmaengine_pcm_register(dev, &udma_dmaengine_pcm_config,
  37                                               0);
  38}
  39EXPORT_SYMBOL_GPL(udma_pcm_platform_register);
  40
  41MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
  42MODULE_DESCRIPTION("UDMA PCM ASoC platform driver");
  43MODULE_LICENSE("GPL v2");
  44