56 строки
1.8 KiB
C
56 строки
1.8 KiB
C
/*
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* ALSA PCM interface for ST SPEAr Processors
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*
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* sound/soc/spear/spear_pcm.c
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*
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* Copyright (C) 2012 ST Microelectronics
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* Rajeev Kumar<rajeevkumar.linux@gmail.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/module.h>
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#include <linux/dmaengine.h>
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#include <linux/platform_device.h>
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#include <sound/dmaengine_pcm.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/spear_dma.h>
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#include "spear_pcm.h"
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static const struct snd_pcm_hardware spear_pcm_hardware = {
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.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
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.buffer_bytes_max = 16 * 1024, /* max buffer size */
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.period_bytes_min = 2 * 1024, /* 1 msec data minimum period size */
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.period_bytes_max = 2 * 1024, /* maximum period size */
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.periods_min = 1, /* min # periods */
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.periods_max = 8, /* max # of periods */
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.fifo_size = 0, /* fifo size in bytes */
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};
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static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = {
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.pcm_hardware = &spear_pcm_hardware,
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.prealloc_buffer_size = 16 * 1024,
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};
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int devm_spear_pcm_platform_register(struct device *dev,
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struct snd_dmaengine_pcm_config *config,
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bool (*filter)(struct dma_chan *chan, void *slave))
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{
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*config = spear_dmaengine_pcm_config;
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config->compat_filter_fn = filter;
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return devm_snd_dmaengine_pcm_register(dev, 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_spear_pcm_platform_register);
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MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
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MODULE_DESCRIPTION("SPEAr PCM DMA module");
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MODULE_LICENSE("GPL");
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