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 static struct snd_dmaengine_pcm_config samsung_dmaengine_pcm_config = { 32 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, 33 }; 34 35 void samsung_asoc_init_dma_data(struct snd_soc_dai *dai, 36 struct s3c_dma_params *playback, 37 struct s3c_dma_params *capture) 38 { 39 struct snd_dmaengine_dai_dma_data *playback_data = NULL; 40 struct snd_dmaengine_dai_dma_data *capture_data = NULL; 41 42 if (playback) { 43 playback_data = &playback->dma_data; 44 playback_data->filter_data = playback->slave; 45 playback_data->chan_name = playback->ch_name; 46 playback_data->addr = playback->dma_addr; 47 playback_data->addr_width = playback->dma_size; 48 } 49 if (capture) { 50 capture_data = &capture->dma_data; 51 capture_data->filter_data = capture->slave; 52 capture_data->chan_name = capture->ch_name; 53 capture_data->addr = capture->dma_addr; 54 capture_data->addr_width = capture->dma_size; 55 } 56 57 snd_soc_dai_init_dma_data(dai, playback_data, capture_data); 58 } 59 EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data); 60 61 int samsung_asoc_dma_platform_register(struct device *dev, 62 dma_filter_fn filter) 63 { 64 samsung_dmaengine_pcm_config.compat_filter_fn = filter; 65 66 return devm_snd_dmaengine_pcm_register(dev, 67 &samsung_dmaengine_pcm_config, 68 SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME | 69 SND_DMAENGINE_PCM_FLAG_COMPAT); 70 } 71 EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register); 72 73 MODULE_AUTHOR("Mark Brown <broonie@linaro.org>"); 74 MODULE_DESCRIPTION("Samsung dmaengine ASoC driver"); 75 MODULE_LICENSE("GPL"); 76