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
16 static 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
29 static 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
udma_pcm_platform_register(struct device * dev)34 int udma_pcm_platform_register(struct device *dev)
35 {
36 return devm_snd_dmaengine_pcm_register(dev, &udma_dmaengine_pcm_config,
37 0);
38 }
39 EXPORT_SYMBOL_GPL(udma_pcm_platform_register);
40
41 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
42 MODULE_DESCRIPTION("UDMA PCM ASoC platform driver");
43 MODULE_LICENSE("GPL v2");
44