tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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);