1 /* 2 * dmaengine.c - Samsung dmaengine wrapper 3 * 4 * Author: Mark Brown <broonie@linaro.org> 5 * Copyright 2013 Linaro 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * version 2 as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 */ 17 18 #include <linux/module.h> 19 #include <sound/core.h> 20 #include <sound/pcm.h> 21 #include <sound/pcm_params.h> 22 #include <sound/dmaengine_pcm.h> 23 #include <sound/soc.h> 24 25 #include "dma.h" 26 27 int samsung_asoc_dma_platform_register(struct device *dev, dma_filter_fn filter, 28 const char *tx, const char *rx) 29 { 30 unsigned int flags = SND_DMAENGINE_PCM_FLAG_COMPAT; 31 struct snd_dmaengine_pcm_config *pcm_conf; 32 33 pcm_conf = devm_kzalloc(dev, sizeof(*pcm_conf), GFP_KERNEL); 34 if (!pcm_conf) 35 return -ENOMEM; 36 37 pcm_conf->prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config; 38 pcm_conf->compat_filter_fn = filter; 39 40 if (dev->of_node) { 41 pcm_conf->chan_names[SNDRV_PCM_STREAM_PLAYBACK] = tx; 42 pcm_conf->chan_names[SNDRV_PCM_STREAM_CAPTURE] = rx; 43 } else { 44 flags |= SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME; 45 } 46 47 return devm_snd_dmaengine_pcm_register(dev, pcm_conf, flags); 48 } 49 EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register); 50 51 MODULE_AUTHOR("Mark Brown <broonie@linaro.org>"); 52 MODULE_DESCRIPTION("Samsung dmaengine ASoC driver"); 53 MODULE_LICENSE("GPL"); 54