blob: 9e7691103f0530a3f477025628aa566533a1d14f [file] [log] [blame]
Peter Ujfalusidde637f2018-05-07 11:49:54 +03001// SPDX-License-Identifier: GPL-2.0
2/*
Alexander A. Klimov3323a142020-07-18 13:24:03 +02003 * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com
Peter Ujfalusidde637f2018-05-07 11:49:54 +03004 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
5 */
6
Peter Ujfalusi1cc0fe22018-05-15 09:43:35 +03007#include <linux/device.h>
Peter Ujfalusi7bf8ad12018-05-15 09:43:34 +03008#include <linux/module.h>
Peter Ujfalusidde637f2018-05-07 11:49:54 +03009#include <sound/core.h>
10#include <sound/pcm.h>
11#include <sound/pcm_params.h>
12#include <sound/soc.h>
13#include <sound/dmaengine_pcm.h>
Peter Ujfalusidde637f2018-05-07 11:49:54 +030014
15#include "sdma-pcm.h"
16
17static const struct snd_pcm_hardware sdma_pcm_hardware = {
18 .info = SNDRV_PCM_INFO_MMAP |
19 SNDRV_PCM_INFO_MMAP_VALID |
20 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
21 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
22 SNDRV_PCM_INFO_INTERLEAVED,
23 .period_bytes_min = 32,
24 .period_bytes_max = 64 * 1024,
25 .buffer_bytes_max = 128 * 1024,
26 .periods_min = 2,
27 .periods_max = 255,
28};
29
30static const struct snd_dmaengine_pcm_config sdma_dmaengine_pcm_config = {
31 .pcm_hardware = &sdma_pcm_hardware,
32 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
Peter Ujfalusidde637f2018-05-07 11:49:54 +030033 .prealloc_buffer_size = 128 * 1024,
34};
35
36int sdma_pcm_platform_register(struct device *dev,
37 char *txdmachan, char *rxdmachan)
38{
39 struct snd_dmaengine_pcm_config *config;
Arnd Bergmann642aafe2019-03-07 16:16:08 +010040 unsigned int flags = 0;
Peter Ujfalusidde637f2018-05-07 11:49:54 +030041
42 /* Standard names for the directions: 'tx' and 'rx' */
43 if (!txdmachan && !rxdmachan)
44 return devm_snd_dmaengine_pcm_register(dev,
Arnd Bergmann642aafe2019-03-07 16:16:08 +010045 &sdma_dmaengine_pcm_config, 0);
Peter Ujfalusidde637f2018-05-07 11:49:54 +030046
47 config = devm_kzalloc(dev, sizeof(*config), GFP_KERNEL);
48 if (!config)
49 return -ENOMEM;
50
51 *config = sdma_dmaengine_pcm_config;
52
53 if (!txdmachan || !rxdmachan) {
54 /* One direction only PCM */
55 flags |= SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX;
56 if (!txdmachan) {
57 txdmachan = rxdmachan;
58 rxdmachan = NULL;
59 }
60 }
61
62 config->chan_names[0] = txdmachan;
63 config->chan_names[1] = rxdmachan;
64
Peter Ujfalusidd7e8d92019-10-28 13:52:07 +020065 return devm_snd_dmaengine_pcm_register(dev, config, flags);
Peter Ujfalusidde637f2018-05-07 11:49:54 +030066}
67EXPORT_SYMBOL_GPL(sdma_pcm_platform_register);
Peter Ujfalusi7bf8ad12018-05-15 09:43:34 +030068
69MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
70MODULE_DESCRIPTION("sDMA PCM ASoC platform driver");
71MODULE_LICENSE("GPL v2");