1// SPDX-License-Identifier: GPL-2.0
2//
3// CS42L43 CODEC driver SoundWire handling
4//
5// Copyright (C) 2022-2023 Cirrus Logic, Inc. and
6//                         Cirrus Logic International Semiconductor Ltd.
7
8#include <linux/errno.h>
9#include <linux/mfd/cs42l43.h>
10#include <linux/mfd/cs42l43-regs.h>
11#include <linux/module.h>
12#include <sound/pcm.h>
13#include <sound/sdw.h>
14#include <sound/soc-component.h>
15#include <sound/soc-dai.h>
16#include <sound/soc.h>
17
18#include "cs42l43.h"
19
20int cs42l43_sdw_add_peripheral(struct snd_pcm_substream *substream,
21			       struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
22{
23	struct cs42l43_codec *priv = snd_soc_component_get_drvdata(dai->component);
24	struct sdw_stream_runtime *sdw_stream = snd_soc_dai_get_dma_data(dai, substream);
25	struct sdw_slave *sdw = dev_to_sdw_dev(priv->dev->parent);
26	struct sdw_stream_config sconfig = {0};
27	struct sdw_port_config pconfig = {0};
28	int ret;
29
30	if (!sdw_stream)
31		return -EINVAL;
32
33	snd_sdw_params_to_config(substream, params, &sconfig, &pconfig);
34
35	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
36		pconfig.num = dai->id;
37	else
38		pconfig.num = dai->id;
39
40	ret = sdw_stream_add_slave(sdw, &sconfig, &pconfig, 1, sdw_stream);
41	if (ret) {
42		dev_err(priv->dev, "Failed to add sdw stream: %d\n", ret);
43		return ret;
44	}
45
46	return 0;
47}
48EXPORT_SYMBOL_NS_GPL(cs42l43_sdw_add_peripheral, SND_SOC_CS42L43);
49
50int cs42l43_sdw_remove_peripheral(struct snd_pcm_substream *substream,
51				  struct snd_soc_dai *dai)
52{
53	struct cs42l43_codec *priv = snd_soc_component_get_drvdata(dai->component);
54	struct sdw_stream_runtime *sdw_stream = snd_soc_dai_get_dma_data(dai, substream);
55	struct sdw_slave *sdw = dev_to_sdw_dev(priv->dev->parent);
56
57	if (!sdw_stream)
58		return -EINVAL;
59
60	return sdw_stream_remove_slave(sdw, sdw_stream);
61}
62EXPORT_SYMBOL_NS_GPL(cs42l43_sdw_remove_peripheral, SND_SOC_CS42L43);
63
64int cs42l43_sdw_set_stream(struct snd_soc_dai *dai, void *sdw_stream, int direction)
65{
66	snd_soc_dai_dma_data_set(dai, direction, sdw_stream);
67
68	return 0;
69}
70EXPORT_SYMBOL_NS_GPL(cs42l43_sdw_set_stream, SND_SOC_CS42L43);
71
72MODULE_DESCRIPTION("CS42L43 CODEC SoundWire Driver");
73MODULE_AUTHOR("Charles Keepax <ckeepax@opensource.cirrus.com>");
74MODULE_LICENSE("GPL");
75