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 #ifdef CONFIG_ARCH_S3C64XX 32 #define filter_fn pl08x_filter_id 33 #elif defined(CONFIG_ARCH_S3C24XX) 34 #define filter_fn s3c24xx_dma_filter 35 #else 36 #define filter_fn NULL 37 #endif 38 39 static const struct snd_dmaengine_pcm_config samsung_dmaengine_pcm_config = { 40 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, 41 .compat_filter_fn = filter_fn, 42 }; 43 44 void samsung_asoc_init_dma_data(struct snd_soc_dai *dai, 45 struct s3c_dma_params *playback, 46 struct s3c_dma_params *capture) 47 { 48 struct snd_dmaengine_dai_dma_data *playback_data = NULL; 49 struct snd_dmaengine_dai_dma_data *capture_data = NULL; 50 51 if (playback) { 52 playback_data = &playback->dma_data; 53 playback_data->filter_data = (void *)playback->channel; 54 playback_data->chan_name = playback->ch_name; 55 playback_data->addr = playback->dma_addr; 56 playback_data->addr_width = playback->dma_size; 57 } 58 if (capture) { 59 capture_data = &capture->dma_data; 60 capture_data->filter_data = (void *)capture->channel; 61 capture_data->chan_name = capture->ch_name; 62 capture_data->addr = capture->dma_addr; 63 capture_data->addr_width = capture->dma_size; 64 } 65 66 snd_soc_dai_init_dma_data(dai, playback_data, capture_data); 67 } 68 EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data); 69 70 int samsung_asoc_dma_platform_register(struct device *dev) 71 { 72 return devm_snd_dmaengine_pcm_register(dev, 73 &samsung_dmaengine_pcm_config, 74 SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME | 75 SND_DMAENGINE_PCM_FLAG_COMPAT); 76 } 77 EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register); 78 79 MODULE_AUTHOR("Mark Brown <broonie@linaro.org>"); 80 MODULE_DESCRIPTION("Samsung dmaengine ASoC driver"); 81 MODULE_LICENSE("GPL"); 82