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, config: &udma_dmaengine_pcm_config,
37 flags: 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");
44

source code of linux/sound/soc/ti/udma-pcm.c