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
  16 static 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
  29 static 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
  34 int udma_pcm_platform_register(struct device *dev)
  35 {
  36         return devm_snd_dmaengine_pcm_register(dev, &udma_dmaengine_pcm_config,
  37                                                0);
  38 }
  39 EXPORT_SYMBOL_GPL(udma_pcm_platform_register);
  40
  41 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
  42 MODULE_DESCRIPTION("UDMA PCM ASoC platform driver");
  43 MODULE_LICENSE("GPL v2");