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67 lines
1.7 KiB
67 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface |
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* |
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* Copyright (C) 2006 Lennert Buytenhek <[email protected]> |
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* Copyright (C) 2006 Applied Data Systems |
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* |
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* Rewritten for the SoC audio subsystem (Based on PXA2xx code): |
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* Copyright (c) 2008 Ryan Mallon |
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*/ |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/platform_device.h> |
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#include <linux/dmaengine.h> |
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#include <sound/pcm.h> |
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#include <sound/soc.h> |
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#include <sound/dmaengine_pcm.h> |
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#include <linux/platform_data/dma-ep93xx.h> |
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#include "ep93xx-pcm.h" |
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static const struct snd_pcm_hardware ep93xx_pcm_hardware = { |
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.info = (SNDRV_PCM_INFO_MMAP | |
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SNDRV_PCM_INFO_MMAP_VALID | |
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SNDRV_PCM_INFO_INTERLEAVED | |
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SNDRV_PCM_INFO_BLOCK_TRANSFER), |
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.buffer_bytes_max = 131072, |
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.period_bytes_min = 32, |
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.period_bytes_max = 32768, |
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.periods_min = 1, |
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.periods_max = 32, |
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.fifo_size = 32, |
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}; |
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static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param) |
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{ |
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struct ep93xx_dma_data *data = filter_param; |
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if (data->direction == ep93xx_dma_chan_direction(chan)) { |
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chan->private = data; |
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return true; |
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} |
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return false; |
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} |
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static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = { |
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.pcm_hardware = &ep93xx_pcm_hardware, |
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.compat_filter_fn = ep93xx_pcm_dma_filter, |
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.prealloc_buffer_size = 131072, |
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}; |
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int devm_ep93xx_pcm_platform_register(struct device *dev) |
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{ |
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return devm_snd_dmaengine_pcm_register(dev, |
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&ep93xx_dmaengine_pcm_config, |
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SND_DMAENGINE_PCM_FLAG_NO_DT | |
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SND_DMAENGINE_PCM_FLAG_COMPAT); |
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} |
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EXPORT_SYMBOL_GPL(devm_ep93xx_pcm_platform_register); |
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MODULE_AUTHOR("Ryan Mallon"); |
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MODULE_DESCRIPTION("EP93xx ALSA PCM interface"); |
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MODULE_LICENSE("GPL");
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