d70e861a31
The Samsung dmaengine ASoC driver is used with two different dmaengine drivers. The pl80x, which properly supports residue reporting and the pl330, which reports that it does not support residue reporting. So there is no need to manually set the NO_RESIDUE flag. This has the advantage that a proper (race condition free) PCM pointer() implementation is used when the pl80x driver is used. Also once the pl330 driver supports residue reporting the ASoC PCM driver will automatically start using it. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@linaro.org>
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*
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* dmaengine.c - Samsung dmaengine wrapper
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*
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* Author: Mark Brown <broonie@linaro.org>
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* Copyright 2013 Linaro
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/amba/pl08x.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/dmaengine_pcm.h>
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#include <sound/soc.h>
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#include <sound/soc-dai.h>
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#include "dma.h"
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#ifdef CONFIG_ARCH_S3C64XX
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#define filter_fn pl08x_filter_id
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#else
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#define filter_fn NULL
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#endif
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static const struct snd_dmaengine_pcm_config samsung_dmaengine_pcm_config = {
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.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
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.compat_filter_fn = filter_fn,
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};
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void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
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struct s3c_dma_params *playback,
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struct s3c_dma_params *capture)
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{
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struct snd_dmaengine_dai_dma_data *playback_data = NULL;
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struct snd_dmaengine_dai_dma_data *capture_data = NULL;
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if (playback) {
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playback_data = &playback->dma_data;
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playback_data->filter_data = (void *)playback->channel;
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playback_data->chan_name = playback->ch_name;
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playback_data->addr = playback->dma_addr;
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playback_data->addr_width = playback->dma_size;
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}
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if (capture) {
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capture_data = &capture->dma_data;
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capture_data->filter_data = (void *)capture->channel;
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capture_data->chan_name = capture->ch_name;
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capture_data->addr = capture->dma_addr;
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capture_data->addr_width = capture->dma_size;
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}
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snd_soc_dai_init_dma_data(dai, playback_data, capture_data);
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}
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EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data);
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int samsung_asoc_dma_platform_register(struct device *dev)
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{
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return snd_dmaengine_pcm_register(dev, &samsung_dmaengine_pcm_config,
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SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME |
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SND_DMAENGINE_PCM_FLAG_COMPAT);
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}
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EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register);
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void samsung_asoc_dma_platform_unregister(struct device *dev)
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{
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return snd_dmaengine_pcm_unregister(dev);
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}
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EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_unregister);
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MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
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MODULE_DESCRIPTION("Samsung dmaengine ASoC driver");
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MODULE_LICENSE("GPL");
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