udma-pcm.c

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 *  Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com
 4 *  Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
 5 */
 6
 7#include <linux/module.h>
 8#include <sound/core.h>
 9#include <sound/pcm.h>
10#include <sound/pcm_params.h>
11#include <sound/soc.h>
12#include <sound/dmaengine_pcm.h>
13
14#include "udma-pcm.h"
15
16static const struct snd_pcm_hardware udma_pcm_hardware = {
17	.info			= SNDRV_PCM_INFO_MMAP |
18				  SNDRV_PCM_INFO_MMAP_VALID |
19				  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
20				  SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
21				  SNDRV_PCM_INFO_INTERLEAVED,
22	.buffer_bytes_max	= SIZE_MAX,
23	.period_bytes_min	= 32,
24	.period_bytes_max	= SZ_64K,
25	.periods_min		= 2,
26	.periods_max		= UINT_MAX,
27};
28
29static const struct snd_dmaengine_pcm_config udma_dmaengine_pcm_config = {
30	.pcm_hardware = &udma_pcm_hardware,
31	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
32};
33
34int udma_pcm_platform_register(struct device *dev)
35{
36	return devm_snd_dmaengine_pcm_register(dev, &udma_dmaengine_pcm_config,
37					       0);
38}
39EXPORT_SYMBOL_GPL(udma_pcm_platform_register);
40
41MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
42MODULE_DESCRIPTION("UDMA PCM ASoC platform driver");
43MODULE_LICENSE("GPL v2");