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