projects / mirror_ubuntu-focal-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| e7f73a16 LPC |
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 | ||
| e7f73a16 LPC |
35 | int snd_hwparams_to_dma_slave_config(const struct snd_pcm_substream *substream, |
| 36 | const struct snd_pcm_hw_params *params, struct dma_slave_config *slave_config); | |
| 37 | int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd); | |
| 3528f27a | 38 | snd_pcm_uframes_t snd_dmaengine_pcm_pointer(struct snd_pcm_substream *substream); |
| 9883ab22 | 39 | snd_pcm_uframes_t snd_dmaengine_pcm_pointer_no_residue(struct snd_pcm_substream *substream); |
| e7f73a16 LPC |
40 | |
| 41 | int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream, | |
| 7c1c1d4a | 42 | struct dma_chan *chan); |
| e7f73a16 LPC |
43 | int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream); |
| 44 | ||
| 7c1c1d4a LPC |
45 | int snd_dmaengine_pcm_open_request_chan(struct snd_pcm_substream *substream, |
| 46 | dma_filter_fn filter_fn, void *filter_data); | |
| 47 | int snd_dmaengine_pcm_close_release_chan(struct snd_pcm_substream *substream); | |
| 48 | ||
| e7f73a16 LPC |
49 | struct dma_chan *snd_dmaengine_pcm_get_chan(struct snd_pcm_substream *substream); |
| 50 | ||
| 85c9f9c5 LPC |
51 | /** |
| 52 | * struct snd_dmaengine_dai_dma_data - DAI DMA configuration data | |
| 53 | * @addr: Address of the DAI data source or destination register. | |
| 54 | * @addr_width: Width of the DAI data source or destination register. | |
| 55 | * @maxburst: Maximum number of words(note: words, as in units of the | |
| 56 | * src_addr_width member, not bytes) that can be send to or received from the | |
| 57 | * DAI in one burst. | |
| 58 | * @slave_id: Slave requester id for the DMA channel. | |
| 59 | * @filter_data: Custom DMA channel filter data, this will usually be used when | |
| 60 | * requesting the DMA channel. | |
| 61 | */ | |
| 62 | struct snd_dmaengine_dai_dma_data { | |
| 63 | dma_addr_t addr; | |
| 64 | enum dma_slave_buswidth addr_width; | |
| 65 | u32 maxburst; | |
| 66 | unsigned int slave_id; | |
| 67 | void *filter_data; | |
| 68 | }; | |
| 69 | ||
| 70 | void snd_dmaengine_pcm_set_config_from_dai_data( | |
| 71 | const struct snd_pcm_substream *substream, | |
| 72 | const struct snd_dmaengine_dai_dma_data *dma_data, | |
| 73 | struct dma_slave_config *config); | |
| 74 | ||
| e7f73a16 | 75 | #endif |