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 21 #include <sound/core.h> 22 #include <sound/pcm.h> 23 #include <sound/pcm_params.h> 24 #include <sound/dmaengine_pcm.h> 25 #include <sound/soc.h> 26 #include <sound/soc-dai.h> 27 28 #include "dma.h" 29 30 #ifdef CONFIG_ARCH_S3C64XX 31 #define filter_fn pl08x_filter_id 32 #else 33 #define filter_fn NULL 34 #endif 35 36 static const struct snd_dmaengine_pcm_config samsung_dmaengine_pcm_config = { 37 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, 38 .compat_filter_fn = filter_fn, 39 }; 40 41 void samsung_asoc_init_dma_data(struct snd_soc_dai *dai, 42 struct s3c_dma_params *playback, 43 struct s3c_dma_params *capture) 44 { 45 struct snd_dmaengine_dai_dma_data *playback_data = NULL; 46 struct snd_dmaengine_dai_dma_data *capture_data = NULL; 47 48 if (playback) { 49 playback_data = &playback->dma_data; 50 playback_data->filter_data = (void *)playback->channel; 51 playback_data->chan_name = playback->ch_name; 52 playback_data->addr = playback->dma_addr; 53 playback_data->addr_width = playback->dma_size; 54 } 55 if (capture) { 56 capture_data = &capture->dma_data; 57 capture_data->filter_data = (void *)capture->channel; 58 capture_data->chan_name = capture->ch_name; 59 capture_data->addr = capture->dma_addr; 60 capture_data->addr_width = capture->dma_size; 61 } 62 63 snd_soc_dai_init_dma_data(dai, playback_data, capture_data); 64 } 65 EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data); 66 67 int samsung_asoc_dma_platform_register(struct device *dev) 68 { 69 return devm_snd_dmaengine_pcm_register(dev, 70 &samsung_dmaengine_pcm_config, 71 SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME | 72 SND_DMAENGINE_PCM_FLAG_COMPAT); 73 } 74 EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register); 75 76 MODULE_AUTHOR("Mark Brown <broonie@linaro.org>"); 77 MODULE_DESCRIPTION("Samsung dmaengine ASoC driver"); 78 MODULE_LICENSE("GPL"); 79