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 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 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 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