| Lars-Peter Clausen | e7f73a1 | 2012-02-22 10:49:08 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012, Analog Devices Inc. |
| 3 | * Author: Lars-Peter Clausen <lars@metafoo.de> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License as published by the |
| 7 | * Free Software Foundation; either version 2 of the License, or (at your |
| 8 | * option) any later version. |
| 9 | * |
| 10 | * You should have received a copy of the GNU General Public License along |
| 11 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 12 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 13 | * |
| 14 | */ |
| 15 | #ifndef __SOUND_DMAENGINE_PCM_H__ |
| 16 | #define __SOUND_DMAENGINE_PCM_H__ |
| 17 | |
| 18 | #include <sound/pcm.h> |
| 19 | #include <linux/dmaengine.h> |
| 20 | |
| 21 | /** |
| 22 | * snd_pcm_substream_to_dma_direction - Get dma_transfer_direction for a PCM |
| 23 | * substream |
| 24 | * @substream: PCM substream |
| 25 | */ |
| 26 | static inline enum dma_transfer_direction |
| 27 | snd_pcm_substream_to_dma_direction(const struct snd_pcm_substream *substream) |
| 28 | { |
| 29 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 30 | return DMA_MEM_TO_DEV; |
| 31 | else |
| 32 | return DMA_DEV_TO_MEM; |
| 33 | } |
| 34 | |
| 35 | void snd_dmaengine_pcm_set_data(struct snd_pcm_substream *substream, void *data); |
| 36 | void *snd_dmaengine_pcm_get_data(struct snd_pcm_substream *substream); |
| 37 | |
| 38 | int snd_hwparams_to_dma_slave_config(const struct snd_pcm_substream *substream, |
| 39 | const struct snd_pcm_hw_params *params, struct dma_slave_config *slave_config); |
| 40 | int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd); |
| 41 | snd_pcm_uframes_t snd_dmaengine_pcm_pointer(struct snd_pcm_substream *substream); |
| 42 | |
| 43 | int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream, |
| 44 | dma_filter_fn filter_fn, void *filter_data); |
| 45 | int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream); |
| 46 | |
| 47 | struct dma_chan *snd_dmaengine_pcm_get_chan(struct snd_pcm_substream *substream); |
| 48 | |
| 49 | #endif |