sound/soc/samsung/dmaengine.c

   1 /*
   2  * dmaengine.c - Samsung dmaengine wrapper
   3  *
   4  * Author: Mark Brown <broonie@linaro.org>
   5  * Copyright 2013 Linaro
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * version 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/amba/pl08x.h>
  20 #include <linux/platform_data/dma-s3c24xx.h>
  21
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/dmaengine_pcm.h>
  26 #include <sound/soc.h>
  27 #include <sound/soc-dai.h>
  28
  29 #include "dma.h"
  30
  31 void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
  32                                 struct s3c_dma_params *playback,
  33                                 struct s3c_dma_params *capture)
  34 {
  35         struct snd_dmaengine_dai_dma_data *playback_data = NULL;
  36         struct snd_dmaengine_dai_dma_data *capture_data = NULL;
  37
  38         if (playback) {
  39                 playback_data = &playback->dma_data;
  40                 playback_data->filter_data = playback->slave;
  41                 playback_data->chan_name = playback->ch_name;
  42                 playback_data->addr = playback->dma_addr;
  43                 playback_data->addr_width = playback->dma_size;
  44         }
  45         if (capture) {
  46                 capture_data = &capture->dma_data;
  47                 capture_data->filter_data = capture->slave;
  48                 capture_data->chan_name = capture->ch_name;
  49                 capture_data->addr = capture->dma_addr;
  50                 capture_data->addr_width = capture->dma_size;
  51         }
  52
  53         snd_soc_dai_init_dma_data(dai, playback_data, capture_data);
  54 }
  55 EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data);
  56
  57 int samsung_asoc_dma_platform_register(struct device *dev, dma_filter_fn filter,
  58                                        const char *tx, const char *rx)
  59 {
  60         unsigned int flags = SND_DMAENGINE_PCM_FLAG_COMPAT;
  61
  62         struct snd_dmaengine_pcm_config *pcm_conf;
  63
  64         pcm_conf = devm_kzalloc(dev, sizeof(*pcm_conf), GFP_KERNEL);
  65         if (!pcm_conf)
  66                 return -ENOMEM;
  67
  68         pcm_conf->prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
  69         pcm_conf->compat_filter_fn = filter;
  70
  71         if (dev->of_node) {
  72                 pcm_conf->chan_names[SNDRV_PCM_STREAM_PLAYBACK] = tx;
  73                 pcm_conf->chan_names[SNDRV_PCM_STREAM_CAPTURE] = rx;
  74         } else {
  75                 flags |= SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME;
  76         }
  77
  78         return devm_snd_dmaengine_pcm_register(dev, pcm_conf, flags);
  79 }
  80 EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register);
  81
  82 MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
  83 MODULE_DESCRIPTION("Samsung dmaengine ASoC driver");
  84 MODULE_LICENSE("GPL");