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1// SPDX-License-Identifier: GPL-2.02//3// Loongson ASoC Audio Machine driver4//5// Copyright (C) 2023 Loongson Technology Corporation Limited6// Author: Yingkun Meng <mengyingkun@loongson.cn>7//8 9#include <linux/module.h>10#include <sound/soc.h>11#include <sound/soc-acpi.h>12#include <linux/acpi.h>13#include <linux/pci.h>14#include <sound/pcm_params.h>15 16static char codec_name[SND_ACPI_I2C_ID_LEN];17 18struct loongson_card_data {19 struct snd_soc_card snd_card;20 unsigned int mclk_fs;21};22 23static int loongson_card_hw_params(struct snd_pcm_substream *substream,24 struct snd_pcm_hw_params *params)25{26 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);27 struct loongson_card_data *ls_card = snd_soc_card_get_drvdata(rtd->card);28 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);29 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);30 int ret, mclk;31 32 if (!ls_card->mclk_fs)33 return 0;34 35 mclk = ls_card->mclk_fs * params_rate(params);36 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk, SND_SOC_CLOCK_OUT);37 if (ret < 0) {38 dev_err(codec_dai->dev, "cpu_dai clock not set\n");39 return ret;40 }41 42 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, SND_SOC_CLOCK_IN);43 if (ret < 0) {44 dev_err(codec_dai->dev, "codec_dai clock not set\n");45 return ret;46 }47 48 return 0;49}50 51static const struct snd_soc_ops loongson_ops = {52 .hw_params = loongson_card_hw_params,53};54 55SND_SOC_DAILINK_DEFS(analog,56 DAILINK_COMP_ARRAY(COMP_CPU("loongson-i2s")),57 DAILINK_COMP_ARRAY(COMP_EMPTY()),58 DAILINK_COMP_ARRAY(COMP_EMPTY()));59 60static struct snd_soc_dai_link loongson_dai_links[] = {61 {62 .name = "Loongson Audio Port",63 .stream_name = "Loongson Audio",64 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_IB_NF65 | SND_SOC_DAIFMT_CBC_CFC,66 SND_SOC_DAILINK_REG(analog),67 .ops = &loongson_ops,68 },69};70 71static struct acpi_device *loongson_card_acpi_find_device(struct snd_soc_card *card,72 const char *name)73{74 struct fwnode_handle *fwnode = card->dev->fwnode;75 struct fwnode_reference_args args;76 int status;77 78 memset(&args, 0, sizeof(args));79 status = acpi_node_get_property_reference(fwnode, name, 0, &args);80 if (status || !is_acpi_device_node(args.fwnode)) {81 dev_err(card->dev, "No matching phy in ACPI table\n");82 return NULL;83 }84 85 return to_acpi_device_node(args.fwnode);86}87 88static int loongson_card_parse_acpi(struct loongson_card_data *data)89{90 struct snd_soc_card *card = &data->snd_card;91 const char *codec_dai_name;92 struct acpi_device *adev;93 struct device *phy_dev;94 int i;95 96 /* fixup platform name based on reference node */97 adev = loongson_card_acpi_find_device(card, "cpu");98 if (!adev)99 return -ENOENT;100 101 phy_dev = acpi_get_first_physical_node(adev);102 if (!phy_dev)103 return -EPROBE_DEFER;104 105 /* fixup codec name based on reference node */106 adev = loongson_card_acpi_find_device(card, "codec");107 if (!adev)108 return -ENOENT;109 snprintf(codec_name, sizeof(codec_name), "i2c-%s", acpi_dev_name(adev));110 111 device_property_read_string(card->dev, "codec-dai-name", &codec_dai_name);112 113 for (i = 0; i < card->num_links; i++) {114 loongson_dai_links[i].platforms->name = dev_name(phy_dev);115 loongson_dai_links[i].codecs->name = codec_name;116 loongson_dai_links[i].codecs->dai_name = codec_dai_name;117 }118 119 return 0;120}121 122static int loongson_card_parse_of(struct loongson_card_data *data)123{124 struct device_node *cpu, *codec;125 struct snd_soc_card *card = &data->snd_card;126 struct device *dev = card->dev;127 int ret, i;128 129 cpu = of_get_child_by_name(dev->of_node, "cpu");130 if (!cpu) {131 dev_err(dev, "platform property missing or invalid\n");132 return -EINVAL;133 }134 codec = of_get_child_by_name(dev->of_node, "codec");135 if (!codec) {136 dev_err(dev, "audio-codec property missing or invalid\n");137 of_node_put(cpu);138 return -EINVAL;139 }140 141 for (i = 0; i < card->num_links; i++) {142 ret = snd_soc_of_get_dlc(cpu, NULL, loongson_dai_links[i].cpus, 0);143 if (ret < 0) {144 dev_err(dev, "getting cpu dlc error (%d)\n", ret);145 goto err;146 }147 loongson_dai_links[i].platforms->of_node = loongson_dai_links[i].cpus->of_node;148 149 ret = snd_soc_of_get_dlc(codec, NULL, loongson_dai_links[i].codecs, 0);150 if (ret < 0) {151 dev_err(dev, "getting codec dlc error (%d)\n", ret);152 goto err;153 }154 }155 156 of_node_put(cpu);157 of_node_put(codec);158 159 return 0;160 161err:162 of_node_put(cpu);163 of_node_put(codec);164 return ret;165}166 167static int loongson_asoc_card_probe(struct platform_device *pdev)168{169 struct loongson_card_data *ls_priv;170 struct device *dev = &pdev->dev;171 struct snd_soc_card *card;172 int ret;173 174 ls_priv = devm_kzalloc(dev, sizeof(*ls_priv), GFP_KERNEL);175 if (!ls_priv)176 return -ENOMEM;177 178 card = &ls_priv->snd_card;179 180 card->dev = dev;181 card->owner = THIS_MODULE;182 card->dai_link = loongson_dai_links;183 card->num_links = ARRAY_SIZE(loongson_dai_links);184 snd_soc_card_set_drvdata(card, ls_priv);185 186 ret = device_property_read_string(dev, "model", &card->name);187 if (ret)188 return dev_err_probe(dev, ret, "Error parsing card name\n");189 190 ret = device_property_read_u32(dev, "mclk-fs", &ls_priv->mclk_fs);191 if (ret)192 return dev_err_probe(dev, ret, "Error parsing mclk-fs\n");193 194 ret = has_acpi_companion(dev) ? loongson_card_parse_acpi(ls_priv)195 : loongson_card_parse_of(ls_priv);196 if (ret)197 return dev_err_probe(dev, ret, "Error parsing acpi/of properties\n");198 199 return devm_snd_soc_register_card(dev, card);200}201 202static const struct of_device_id loongson_asoc_dt_ids[] = {203 { .compatible = "loongson,ls-audio-card" },204 { /* sentinel */ },205};206MODULE_DEVICE_TABLE(of, loongson_asoc_dt_ids);207 208static struct platform_driver loongson_audio_driver = {209 .probe = loongson_asoc_card_probe,210 .driver = {211 .name = "loongson-asoc-card",212 .pm = &snd_soc_pm_ops,213 .of_match_table = loongson_asoc_dt_ids,214 },215};216module_platform_driver(loongson_audio_driver);217 218MODULE_DESCRIPTION("Loongson ASoc Sound Card driver");219MODULE_AUTHOR("Loongson Technology Corporation Limited");220MODULE_LICENSE("GPL");221