87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
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/*
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* tegra_pcm.c - Tegra PCM driver
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*
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* Author: Stephen Warren <swarren@nvidia.com>
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* Copyright (C) 2010,2012 - NVIDIA, Inc.
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*
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* Based on code copyright/by:
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*
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* Copyright (c) 2009-2010, NVIDIA Corporation.
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* Scott Peterson <speterson@nvidia.com>
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* Vijay Mali <vmali@nvidia.com>
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*
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* Copyright (C) 2010 Google, Inc.
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* Iliyan Malchev <malchev@google.com>
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/module.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/soc.h>
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#include <sound/dmaengine_pcm.h>
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#include "tegra_pcm.h"
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static const struct snd_pcm_hardware tegra_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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.period_bytes_min = 1024,
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.period_bytes_max = PAGE_SIZE,
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.periods_min = 2,
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.periods_max = 8,
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.buffer_bytes_max = PAGE_SIZE * 8,
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.fifo_size = 4,
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};
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static const struct snd_dmaengine_pcm_config tegra_dmaengine_pcm_config = {
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.pcm_hardware = &tegra_pcm_hardware,
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.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
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.prealloc_buffer_size = PAGE_SIZE * 8,
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};
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int tegra_pcm_platform_register(struct device *dev)
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{
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return snd_dmaengine_pcm_register(dev, &tegra_dmaengine_pcm_config, 0);
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}
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EXPORT_SYMBOL_GPL(tegra_pcm_platform_register);
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int tegra_pcm_platform_register_with_chan_names(struct device *dev,
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struct snd_dmaengine_pcm_config *config,
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char *txdmachan, char *rxdmachan)
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{
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*config = tegra_dmaengine_pcm_config;
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config->dma_dev = dev->parent;
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config->chan_names[0] = txdmachan;
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config->chan_names[1] = rxdmachan;
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return snd_dmaengine_pcm_register(dev, config, 0);
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}
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EXPORT_SYMBOL_GPL(tegra_pcm_platform_register_with_chan_names);
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void tegra_pcm_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(tegra_pcm_platform_unregister);
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MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
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MODULE_DESCRIPTION("Tegra PCM ASoC driver");
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MODULE_LICENSE("GPL");
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