diff options
Diffstat (limited to 'snd-alpx/core/generic/5.7/dmaengine_pcm.h')
| -rw-r--r-- | snd-alpx/core/generic/5.7/dmaengine_pcm.h | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/snd-alpx/core/generic/5.7/dmaengine_pcm.h b/snd-alpx/core/generic/5.7/dmaengine_pcm.h deleted file mode 100644 index b652206..0000000 --- a/snd-alpx/core/generic/5.7/dmaengine_pcm.h +++ /dev/null @@ -1,164 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0+ - * - * Copyright (C) 2012, Analog Devices Inc. - * Author: Lars-Peter Clausen <lars@metafoo.de> - */ - -#ifndef __SOUND_DMAENGINE_PCM_H__ -#define __SOUND_DMAENGINE_PCM_H__ - -#include <sound/pcm.h> -#include <sound/soc.h> -#include <linux/dmaengine.h> - -/** - * snd_pcm_substream_to_dma_direction - Get dma_transfer_direction for a PCM - * substream - * @substream: PCM substream - */ -static inline enum dma_transfer_direction -snd_pcm_substream_to_dma_direction(const struct snd_pcm_substream *substream) -{ - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) - return DMA_MEM_TO_DEV; - else - return DMA_DEV_TO_MEM; -} - -int snd_hwparams_to_dma_slave_config(const struct snd_pcm_substream *substream, - const struct snd_pcm_hw_params *params, struct dma_slave_config *slave_config); -int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd); -snd_pcm_uframes_t snd_dmaengine_pcm_pointer(struct snd_pcm_substream *substream); -snd_pcm_uframes_t snd_dmaengine_pcm_pointer_no_residue(struct snd_pcm_substream *substream); - -int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream, - struct dma_chan *chan); -int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream); - -int snd_dmaengine_pcm_open_request_chan(struct snd_pcm_substream *substream, - dma_filter_fn filter_fn, void *filter_data); -int snd_dmaengine_pcm_close_release_chan(struct snd_pcm_substream *substream); - -struct dma_chan *snd_dmaengine_pcm_request_channel(dma_filter_fn filter_fn, - void *filter_data); -struct dma_chan *snd_dmaengine_pcm_get_chan(struct snd_pcm_substream *substream); - -/* - * The DAI supports packed transfers, eg 2 16-bit samples in a 32-bit word. - * If this flag is set the dmaengine driver won't put any restriction on - * the supported sample formats and set the DMA transfer size to undefined. - * The DAI driver is responsible to disable any unsupported formats in it's - * configuration and catch corner cases that are not already handled in - * the ALSA core. - */ -#define SND_DMAENGINE_PCM_DAI_FLAG_PACK BIT(0) - -/** - * struct snd_dmaengine_dai_dma_data - DAI DMA configuration data - * @addr: Address of the DAI data source or destination register. - * @addr_width: Width of the DAI data source or destination register. - * @maxburst: Maximum number of words(note: words, as in units of the - * src_addr_width member, not bytes) that can be send to or received from the - * DAI in one burst. - * @slave_id: Slave requester id for the DMA channel. - * @filter_data: Custom DMA channel filter data, this will usually be used when - * requesting the DMA channel. - * @chan_name: Custom channel name to use when requesting DMA channel. - * @fifo_size: FIFO size of the DAI controller in bytes - * @flags: PCM_DAI flags, only SND_DMAENGINE_PCM_DAI_FLAG_PACK for now - */ -struct snd_dmaengine_dai_dma_data { - dma_addr_t addr; - enum dma_slave_buswidth addr_width; - u32 maxburst; - unsigned int slave_id; - void *filter_data; - const char *chan_name; - unsigned int fifo_size; - unsigned int flags; -}; - -void snd_dmaengine_pcm_set_config_from_dai_data( - const struct snd_pcm_substream *substream, - const struct snd_dmaengine_dai_dma_data *dma_data, - struct dma_slave_config *config); - -int snd_dmaengine_pcm_refine_runtime_hwparams( - struct snd_pcm_substream *substream, - struct snd_dmaengine_dai_dma_data *dma_data, - struct snd_pcm_hardware *hw, - struct dma_chan *chan); - -/* - * Try to request the DMA channel using compat_request_channel or - * compat_filter_fn if it couldn't be requested through devicetree. - */ -#define SND_DMAENGINE_PCM_FLAG_COMPAT BIT(0) -/* - * Don't try to request the DMA channels through devicetree. This flag only - * makes sense if SND_DMAENGINE_PCM_FLAG_COMPAT is set as well. - */ -#define SND_DMAENGINE_PCM_FLAG_NO_DT BIT(1) -/* - * The PCM is half duplex and the DMA channel is shared between capture and - * playback. - */ -#define SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX BIT(3) - -/** - * struct snd_dmaengine_pcm_config - Configuration data for dmaengine based PCM - * @prepare_slave_config: Callback used to fill in the DMA slave_config for a - * PCM substream. Will be called from the PCM drivers hwparams callback. - * @compat_request_channel: Callback to request a DMA channel for platforms - * which do not use devicetree. - * @process: Callback used to apply processing on samples transferred from/to - * user space. - * @compat_filter_fn: Will be used as the filter function when requesting a - * channel for platforms which do not use devicetree. The filter parameter - * will be the DAI's DMA data. - * @dma_dev: If set, request DMA channel on this device rather than the DAI - * device. - * @chan_names: If set, these custom DMA channel names will be requested at - * registration time. - * @pcm_hardware: snd_pcm_hardware struct to be used for the PCM. - * @prealloc_buffer_size: Size of the preallocated audio buffer. - * - * Note: If both compat_request_channel and compat_filter_fn are set - * compat_request_channel will be used to request the channel and - * compat_filter_fn will be ignored. Otherwise the channel will be requested - * using dma_request_channel with compat_filter_fn as the filter function. - */ -struct snd_dmaengine_pcm_config { - int (*prepare_slave_config)(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params, - struct dma_slave_config *slave_config); - struct dma_chan *(*compat_request_channel)( - struct snd_soc_pcm_runtime *rtd, - struct snd_pcm_substream *substream); - int (*process)(struct snd_pcm_substream *substream, - int channel, unsigned long hwoff, - void *buf, unsigned long bytes); - dma_filter_fn compat_filter_fn; - struct device *dma_dev; - const char *chan_names[SNDRV_PCM_STREAM_LAST + 1]; - - const struct snd_pcm_hardware *pcm_hardware; - unsigned int prealloc_buffer_size; -}; - -int snd_dmaengine_pcm_register(struct device *dev, - const struct snd_dmaengine_pcm_config *config, - unsigned int flags); -void snd_dmaengine_pcm_unregister(struct device *dev); - -int devm_snd_dmaengine_pcm_register(struct device *dev, - const struct snd_dmaengine_pcm_config *config, - unsigned int flags); - -int snd_dmaengine_pcm_prepare_slave_config(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params, - struct dma_slave_config *slave_config); - -#define SND_DMAENGINE_PCM_DRV_NAME "snd_dmaengine_pcm" - -#endif |