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
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <sound/dmaengine_pcm.h>
  25 #include <sound/soc.h>
  26 #include <sound/soc-dai.h>
  27
  28 #include "dma.h"
  29
  30 #ifdef CONFIG_ARCH_S3C64XX
  31 #define filter_fn pl08x_filter_id
  32 #else
  33 #define filter_fn NULL
  34 #endif
  35
  36 static const struct snd_dmaengine_pcm_config samsung_dmaengine_pcm_config = {
  37         .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
  38         .compat_filter_fn = filter_fn,
  39 };
  40
  41 void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
  42                                 struct s3c_dma_params *playback,
  43                                 struct s3c_dma_params *capture)
  44 {
  45         struct snd_dmaengine_dai_dma_data *playback_data = NULL;
  46         struct snd_dmaengine_dai_dma_data *capture_data = NULL;
  47
  48         if (playback) {
  49                 playback_data = &playback->dma_data;
  50                 playback_data->filter_data = (void *)playback->channel;
  51                 playback_data->chan_name = playback->ch_name;
  52                 playback_data->addr = playback->dma_addr;
  53                 playback_data->addr_width = playback->dma_size;
  54         }
  55         if (capture) {
  56                 capture_data = &capture->dma_data;
  57                 capture_data->filter_data = (void *)capture->channel;
  58                 capture_data->chan_name = capture->ch_name;
  59                 capture_data->addr = capture->dma_addr;
  60                 capture_data->addr_width = capture->dma_size;
  61         }
  62
  63         snd_soc_dai_init_dma_data(dai, playback_data, capture_data);
  64 }
  65 EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data);
  66
  67 int samsung_asoc_dma_platform_register(struct device *dev)
  68 {
  69         return snd_dmaengine_pcm_register(dev, &samsung_dmaengine_pcm_config,
  70                                           SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME |
  71                                           SND_DMAENGINE_PCM_FLAG_COMPAT);
  72 }
  73 EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register);
  74
  75 void samsung_asoc_dma_platform_unregister(struct device *dev)
  76 {
  77         return snd_dmaengine_pcm_unregister(dev);
  78 }
  79 EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_unregister);
  80
  81 MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
  82 MODULE_DESCRIPTION("Samsung dmaengine ASoC driver");
  83 MODULE_LICENSE("GPL");