LXR linux/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#ifdef CONFIG_ARCH_S3C64XX
  32#define filter_fn pl08x_filter_id
  33#elif defined(CONFIG_ARCH_S3C24XX)
  34#define filter_fn s3c24xx_dma_filter
  35#else
  36#define filter_fn NULL
  37#endif
  38
  39static const struct snd_dmaengine_pcm_config samsung_dmaengine_pcm_config = {
  40        .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
  41        .compat_filter_fn = filter_fn,
  42};
  43
  44void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
  45                                struct s3c_dma_params *playback,
  46                                struct s3c_dma_params *capture)
  47{
  48        struct snd_dmaengine_dai_dma_data *playback_data = NULL;
  49        struct snd_dmaengine_dai_dma_data *capture_data = NULL;
  50
  51        if (playback) {
  52                playback_data = &playback->dma_data;
  53                playback_data->filter_data = (void *)playback->channel;
  54                playback_data->chan_name = playback->ch_name;
  55                playback_data->addr = playback->dma_addr;
  56                playback_data->addr_width = playback->dma_size;
  57        }
  58        if (capture) {
  59                capture_data = &capture->dma_data;
  60                capture_data->filter_data = (void *)capture->channel;
  61                capture_data->chan_name = capture->ch_name;
  62                capture_data->addr = capture->dma_addr;
  63                capture_data->addr_width = capture->dma_size;
  64        }
  65
  66        snd_soc_dai_init_dma_data(dai, playback_data, capture_data);
  67}
  68EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data);
  69
  70int samsung_asoc_dma_platform_register(struct device *dev)
  71{
  72        return devm_snd_dmaengine_pcm_register(dev,
  73                        &samsung_dmaengine_pcm_config,
  74                        SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME |
  75                        SND_DMAENGINE_PCM_FLAG_COMPAT);
  76}
  77EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register);
  78
  79MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
  80MODULE_DESCRIPTION("Samsung dmaengine ASoC driver");
  81MODULE_LICENSE("GPL");
  82