forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
1.7 KiB
63 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* edma-pcm.c - eDMA PCM driver using dmaengine for AM3xxx, AM4xxx |
|
* |
|
* Copyright (C) 2014 Texas Instruments, Inc. |
|
* |
|
* Author: Peter Ujfalusi <[email protected]> |
|
* |
|
* Based on: sound/soc/tegra/tegra_pcm.c |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <sound/core.h> |
|
#include <sound/pcm.h> |
|
#include <sound/pcm_params.h> |
|
#include <sound/soc.h> |
|
#include <sound/dmaengine_pcm.h> |
|
|
|
#include "edma-pcm.h" |
|
|
|
static const struct snd_pcm_hardware edma_pcm_hardware = { |
|
.info = SNDRV_PCM_INFO_MMAP | |
|
SNDRV_PCM_INFO_MMAP_VALID | |
|
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME | |
|
SNDRV_PCM_INFO_NO_PERIOD_WAKEUP | |
|
SNDRV_PCM_INFO_INTERLEAVED, |
|
.buffer_bytes_max = 128 * 1024, |
|
.period_bytes_min = 32, |
|
.period_bytes_max = 64 * 1024, |
|
.periods_min = 2, |
|
.periods_max = 19, /* Limit by edma dmaengine driver */ |
|
}; |
|
|
|
static const struct snd_dmaengine_pcm_config edma_dmaengine_pcm_config = { |
|
.pcm_hardware = &edma_pcm_hardware, |
|
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, |
|
.prealloc_buffer_size = 128 * 1024, |
|
}; |
|
|
|
int edma_pcm_platform_register(struct device *dev) |
|
{ |
|
struct snd_dmaengine_pcm_config *config; |
|
|
|
if (dev->of_node) |
|
return devm_snd_dmaengine_pcm_register(dev, |
|
&edma_dmaengine_pcm_config, 0); |
|
|
|
config = devm_kzalloc(dev, sizeof(*config), GFP_KERNEL); |
|
if (!config) |
|
return -ENOMEM; |
|
|
|
*config = edma_dmaengine_pcm_config; |
|
|
|
config->chan_names[0] = "tx"; |
|
config->chan_names[1] = "rx"; |
|
|
|
return devm_snd_dmaengine_pcm_register(dev, config, 0); |
|
} |
|
EXPORT_SYMBOL_GPL(edma_pcm_platform_register); |
|
|
|
MODULE_AUTHOR("Peter Ujfalusi <[email protected]>"); |
|
MODULE_DESCRIPTION("eDMA PCM ASoC platform driver"); |
|
MODULE_LICENSE("GPL");
|
|
|