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
cs42l43_sdw_add_peripheral(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)21 int 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 }
45 EXPORT_SYMBOL_NS_GPL(cs42l43_sdw_add_peripheral, SND_SOC_CS42L43);
46
cs42l43_sdw_remove_peripheral(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)47 int 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 }
59 EXPORT_SYMBOL_NS_GPL(cs42l43_sdw_remove_peripheral, SND_SOC_CS42L43);
60
cs42l43_sdw_set_stream(struct snd_soc_dai * dai,void * sdw_stream,int direction)61 int 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 }
67 EXPORT_SYMBOL_NS_GPL(cs42l43_sdw_set_stream, SND_SOC_CS42L43);
68
69 MODULE_DESCRIPTION("CS42L43 CODEC SoundWire Driver");
70 MODULE_AUTHOR("Charles Keepax <ckeepax@opensource.cirrus.com>");
71 MODULE_LICENSE("GPL");
72