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Linux/sound/soc/mxs/mxs-pcm.c

  1 /*
  2  * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
  3  *
  4  * Based on sound/soc/imx/imx-pcm-dma-mx2.c
  5  *
  6  * This program is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License as published by
  8  * the Free Software Foundation; either version 2 of the License, or
  9  * (at your option) any later version.
 10  *
 11  * This program is distributed in the hope that it will be useful,
 12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  * GNU General Public License for more details.
 15  *
 16  * You should have received a copy of the GNU General Public License along
 17  * with this program; if not, write to the Free Software Foundation, Inc.,
 18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 19  */
 20 
 21 #include <linux/device.h>
 22 #include <linux/init.h>
 23 #include <linux/module.h>
 24 
 25 #include <sound/core.h>
 26 #include <sound/pcm.h>
 27 #include <sound/soc.h>
 28 #include <sound/dmaengine_pcm.h>
 29 
 30 #include "mxs-pcm.h"
 31 
 32 static const struct snd_pcm_hardware snd_mxs_hardware = {
 33         .info                   = SNDRV_PCM_INFO_MMAP |
 34                                   SNDRV_PCM_INFO_MMAP_VALID |
 35                                   SNDRV_PCM_INFO_PAUSE |
 36                                   SNDRV_PCM_INFO_RESUME |
 37                                   SNDRV_PCM_INFO_INTERLEAVED |
 38                                   SNDRV_PCM_INFO_HALF_DUPLEX,
 39         .period_bytes_min       = 32,
 40         .period_bytes_max       = 8192,
 41         .periods_min            = 1,
 42         .periods_max            = 52,
 43         .buffer_bytes_max       = 64 * 1024,
 44         .fifo_size              = 32,
 45 };
 46 
 47 static const struct snd_dmaengine_pcm_config mxs_dmaengine_pcm_config = {
 48         .pcm_hardware = &snd_mxs_hardware,
 49         .prealloc_buffer_size = 64 * 1024,
 50 };
 51 
 52 int mxs_pcm_platform_register(struct device *dev)
 53 {
 54         return devm_snd_dmaengine_pcm_register(dev, &mxs_dmaengine_pcm_config,
 55                 SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX);
 56 }
 57 EXPORT_SYMBOL_GPL(mxs_pcm_platform_register);
 58 
 59 MODULE_LICENSE("GPL");
 60 

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