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 <linux/amba/pl08x.h> 20 #include <linux/platform_data/dma-s3c24xx.h> 21 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/dmaengine_pcm.h> 26 #include <sound/soc.h> 27 #include <sound/soc-dai.h> 28 29 #include "dma.h" 30 31 void samsung_asoc_init_dma_data(struct snd_soc_dai *dai, 32 struct s3c_dma_params *playback, 33 struct s3c_dma_params *capture) 34 { 35 struct snd_dmaengine_dai_dma_data *playback_data = NULL; 36 struct snd_dmaengine_dai_dma_data *capture_data = NULL; 37 38 if (playback) { 39 playback_data = &playback->dma_data; 40 playback_data->filter_data = playback->slave; 41 playback_data->chan_name = playback->ch_name; 42 playback_data->addr = playback->dma_addr; 43 playback_data->addr_width = playback->dma_size; 44 } 45 if (capture) { 46 capture_data = &capture->dma_data; 47 capture_data->filter_data = capture->slave; 48 capture_data->chan_name = capture->ch_name; 49 capture_data->addr = capture->dma_addr; 50 capture_data->addr_width = capture->dma_size; 51 } 52 53 snd_soc_dai_init_dma_data(dai, playback_data, capture_data); 54 } 55 EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data); 56 57 int samsung_asoc_dma_platform_register(struct device *dev, dma_filter_fn filter, 58 const char *tx, const char *rx) 59 { 60 unsigned int flags = SND_DMAENGINE_PCM_FLAG_COMPAT; 61 62 struct snd_dmaengine_pcm_config *pcm_conf; 63 64 pcm_conf = devm_kzalloc(dev, sizeof(*pcm_conf), GFP_KERNEL); 65 if (!pcm_conf) 66 return -ENOMEM; 67 68 pcm_conf->prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config; 69 pcm_conf->compat_filter_fn = filter; 70 71 if (dev->of_node) { 72 pcm_conf->chan_names[SNDRV_PCM_STREAM_PLAYBACK] = tx; 73 pcm_conf->chan_names[SNDRV_PCM_STREAM_CAPTURE] = rx; 74 } else { 75 flags |= SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME; 76 } 77 78 return devm_snd_dmaengine_pcm_register(dev, pcm_conf, flags); 79 } 80 EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register); 81 82 MODULE_AUTHOR("Mark Brown <broonie@linaro.org>"); 83 MODULE_DESCRIPTION("Samsung dmaengine ASoC driver"); 84 MODULE_LICENSE("GPL"); 85