1// SPDX-License-Identifier: GPL-2.0-or-later
 2//
 3// Author: Kevin Wells <kevin.wells@nxp.com>
 4//
 5// Copyright (C) 2008 NXP Semiconductors
 6// Copyright 2023 Timesys Corporation <piotr.wojtaszczyk@timesys.com>
 7
 8#include <linux/module.h>
 9#include <linux/init.h>
10#include <linux/platform_device.h>
11#include <linux/slab.h>
12#include <linux/dma-mapping.h>
13#include <linux/amba/pl08x.h>
14
15#include <sound/core.h>
16#include <sound/pcm.h>
17#include <sound/pcm_params.h>
18#include <sound/dmaengine_pcm.h>
19#include <sound/soc.h>
20
21#include "lpc3xxx-i2s.h"
22
23#define STUB_FORMATS	(SNDRV_PCM_FMTBIT_S8 | \
24			SNDRV_PCM_FMTBIT_U8 | \
25			SNDRV_PCM_FMTBIT_S16_LE | \
26			SNDRV_PCM_FMTBIT_U16_LE | \
27			SNDRV_PCM_FMTBIT_S24_LE | \
28			SNDRV_PCM_FMTBIT_U24_LE | \
29			SNDRV_PCM_FMTBIT_S32_LE | \
30			SNDRV_PCM_FMTBIT_U32_LE | \
31			SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
32
33static const struct snd_pcm_hardware lpc3xxx_pcm_hardware = {
34	.info = (SNDRV_PCM_INFO_MMAP |
35		 SNDRV_PCM_INFO_MMAP_VALID |
36		 SNDRV_PCM_INFO_INTERLEAVED |
37		 SNDRV_PCM_INFO_BLOCK_TRANSFER |
38		 SNDRV_PCM_INFO_PAUSE |
39		 SNDRV_PCM_INFO_RESUME),
40	.formats = STUB_FORMATS,
41	.period_bytes_min = 128,
42	.period_bytes_max = 2048,
43	.periods_min = 2,
44	.periods_max = 1024,
45	.buffer_bytes_max = 128 * 1024
46};
47
48static const struct snd_dmaengine_pcm_config lpc3xxx_dmaengine_pcm_config = {
49	.pcm_hardware = &lpc3xxx_pcm_hardware,
50	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
51	.compat_filter_fn = pl08x_filter_id,
52	.prealloc_buffer_size = 128 * 1024,
53};
54
55static const struct snd_soc_component_driver lpc3xxx_soc_platform_driver = {
56	.name = "lpc32xx-pcm",
57};
58
59int lpc3xxx_pcm_register(struct platform_device *pdev)
60{
61	int ret;
62
63	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, &lpc3xxx_dmaengine_pcm_config, 0);
64	if (ret) {
65		dev_err(&pdev->dev, "failed to register dmaengine: %d\n", ret);
66		return ret;
67	}
68
69	return devm_snd_soc_register_component(&pdev->dev, &lpc3xxx_soc_platform_driver,
70					       NULL, 0);
71}
72EXPORT_SYMBOL(lpc3xxx_pcm_register);