sound/soc/samsung/dma.h

   1 /*
   2  *  dma.h --
   3  *
   4  *  This program is free software; you can redistribute  it and/or modify it
   5  *  under  the terms of  the GNU General  Public License as published by the
   6  *  Free Software Foundation;  either version 2 of the  License, or (at your
   7  *  option) any later version.
   8  *
   9  *  ALSA PCM interface for the Samsung SoC
  10  */
  11
  12 #ifndef _S3C_AUDIO_H
  13 #define _S3C_AUDIO_H
  14
  15 #include <sound/dmaengine_pcm.h>
  16 #include <linux/dmaengine.h>
  17
  18 struct s3c_dma_params {
  19         void *slave;                            /* Channel ID */
  20         dma_addr_t dma_addr;
  21         int dma_size;                   /* Size of the DMA transfer */
  22         char *ch_name;
  23         struct snd_dmaengine_dai_dma_data dma_data;
  24 };
  25
  26 void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
  27                                 struct s3c_dma_params *playback,
  28                                 struct s3c_dma_params *capture);
  29 /*
  30  * @tx, @rx arguments can be NULL if the DMA channel names are "tx", "rx",
  31  * otherwise actual DMA channel names must be passed to this function.
  32  */
  33 int samsung_asoc_dma_platform_register(struct device *dev, dma_filter_fn filter,
  34                                        const char *tx, const char *rx);
  35 #endif