@@ -13,4 +13,14 @@ config SND_SOC_LOONGSON_I2S_PCI
The controller is found in loongson bridge chips or SoCs,
and work as a PCI device.
+config SND_SOC_LOONGSON_CARD
+ tristate "Loongson Sound Card Driver"
+ select SND_SOC_LOONGSON_I2S_PCI
+ help
+ Say Y or M if you want to add support for SoC audio using
+ loongson I2S controller.
+
+ The driver add support for ALSA SoC Audio support using
+ loongson I2S controller.
+
endmenu
@@ -2,3 +2,7 @@
#Platform Support
snd-soc-loongson-i2s-pci-objs := loongson_i2s_pci.o loongson_i2s.o loongson_dma.o
obj-$(CONFIG_SND_SOC_LOONGSON_I2S_PCI) += snd-soc-loongson-i2s-pci.o
+
+#Machine Support
+snd-soc-loongson-card-objs := loongson_card.o
+obj-$(CONFIG_SND_SOC_LOONGSON_CARD) += snd-soc-loongson-card.o
new file mode 100644
@@ -0,0 +1,230 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Loongson ASoC Audio Machine driver
+//
+// Copyright (C) 2023 Loongson Technology Corporation Limited
+// Author: Yingkun Meng <mengyingkun@loongson.cn>
+//
+
+#include <linux/module.h>
+#include <sound/soc.h>
+#include <sound/soc-acpi.h>
+#include <linux/acpi.h>
+#include <linux/pci.h>
+#include <sound/pcm_params.h>
+
+static char codec_name[SND_ACPI_I2C_ID_LEN];
+
+struct loongson_card_data {
+ struct snd_soc_card snd_card;
+ unsigned int mclk_fs;
+};
+
+static int loongson_card_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+ struct loongson_card_data *ls_card = snd_soc_card_get_drvdata(rtd->card);
+ int ret, mclk;
+
+ if (ls_card->mclk_fs) {
+ mclk = ls_card->mclk_fs * params_rate(params);
+ ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
+ SND_SOC_CLOCK_OUT);
+ if (ret < 0) {
+ dev_err(codec_dai->dev, "cpu_dai clock not set\n");
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
+ SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ dev_err(codec_dai->dev, "codec_dai clock not set\n");
+ return ret;
+ }
+ }
+ return 0;
+}
+
+static const struct snd_soc_ops loongson_ops = {
+ .hw_params = loongson_card_hw_params,
+};
+
+SND_SOC_DAILINK_DEFS(analog,
+ DAILINK_COMP_ARRAY(COMP_CPU("loongson-i2s")),
+ DAILINK_COMP_ARRAY(COMP_EMPTY()),
+ DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+static struct snd_soc_dai_link loongson_dai_links[] = {
+ {
+ .name = "Loongson Audio Port",
+ .stream_name = "Loongson Audio",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_IB_NF
+ | SND_SOC_DAIFMT_CBC_CFC,
+ SND_SOC_DAILINK_REG(analog),
+ .ops = &loongson_ops,
+ },
+};
+
+static int loongson_card_parse_acpi(struct loongson_card_data *data)
+{
+ struct snd_soc_card *card = &data->snd_card;
+ struct fwnode_handle *fwnode = card->dev->fwnode;
+ struct fwnode_reference_args args;
+ const char *codec_dai_name;
+ struct acpi_device *adev;
+ struct device *phy_dev;
+ int ret, i;
+
+ /* fixup platform name based on reference node */
+ memset(&args, 0, sizeof(args));
+ ret = acpi_node_get_property_reference(fwnode, "cpu", 0, &args);
+ if (ACPI_FAILURE(ret) || !is_acpi_device_node(args.fwnode)) {
+ dev_err(card->dev, "No matching phy in ACPI table\n");
+ return ret;
+ }
+ adev = to_acpi_device_node(args.fwnode);
+ phy_dev = acpi_get_first_physical_node(adev);
+ if (!phy_dev)
+ return -EPROBE_DEFER;
+ for (i = 0; i < card->num_links; i++)
+ loongson_dai_links[i].platforms->name = dev_name(phy_dev);
+
+ /* fixup codec name based on reference node */
+ memset(&args, 0, sizeof(args));
+ ret = acpi_node_get_property_reference(fwnode, "codec", 0, &args);
+ if (ACPI_FAILURE(ret) || !is_acpi_device_node(args.fwnode)) {
+ dev_err(card->dev, "No matching phy in ACPI table\n");
+ return ret;
+ }
+ adev = to_acpi_device_node(args.fwnode);
+ snprintf(codec_name, sizeof(codec_name), "i2c-%s", acpi_dev_name(adev));
+ for (i = 0; i < card->num_links; i++)
+ loongson_dai_links[i].codecs->name = codec_name;
+
+ device_property_read_string(card->dev, "codec-dai-name",
+ &codec_dai_name);
+ for (i = 0; i < card->num_links; i++)
+ loongson_dai_links[i].codecs->dai_name = codec_dai_name;
+
+ return 0;
+}
+
+static int loongson_card_parse_of(struct loongson_card_data *data)
+{
+ const char *cpu_dai_name, *codec_dai_name;
+ struct device_node *cpu, *codec;
+ struct snd_soc_card *card = &data->snd_card;
+ struct device *dev = card->dev;
+ struct of_phandle_args args;
+ int ret, i;
+
+ cpu = of_get_child_by_name(dev->of_node, "cpu");
+ if (!cpu) {
+ dev_err(dev, "platform property missing or invalid\n");
+ return -EINVAL;
+ }
+ codec = of_get_child_by_name(dev->of_node, "codec");
+ if (!codec) {
+ dev_err(dev, "audio-codec property missing or invalid\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ ret = of_parse_phandle_with_args(cpu, "sound-dai",
+ "#sound-dai-cells", 0, &args);
+ if (ret) {
+ dev_err(dev, "codec node missing #sound-dai-cells\n");
+ goto err;
+ }
+ for (i = 0; i < card->num_links; i++)
+ loongson_dai_links[i].cpus->of_node = args.np;
+
+ ret = of_parse_phandle_with_args(codec, "sound-dai",
+ "#sound-dai-cells", 0, &args);
+ if (ret) {
+ dev_err(dev, "codec node missing #sound-dai-cells\n");
+ goto err;
+ }
+ for (i = 0; i < card->num_links; i++)
+ loongson_dai_links[i].codecs->of_node = args.np;
+
+ snd_soc_of_get_dai_name(cpu, &cpu_dai_name);
+ snd_soc_of_get_dai_name(codec, &codec_dai_name);
+ for (i = 0; i < card->num_links; i++) {
+ loongson_dai_links[i].cpus->dai_name = cpu_dai_name;
+ loongson_dai_links[i].codecs->dai_name = codec_dai_name;
+ }
+ of_node_put(cpu);
+ of_node_put(codec);
+
+ return 0;
+
+err:
+ of_node_put(cpu);
+ of_node_put(codec);
+ return ret;
+}
+
+static int loongson_asoc_card_probe(struct platform_device *pdev)
+{
+ struct loongson_card_data *ls_priv;
+ struct snd_soc_card *card;
+ int ret;
+
+ ls_priv = devm_kzalloc(&pdev->dev, sizeof(*ls_priv), GFP_KERNEL);
+ if (!ls_priv)
+ return -ENOMEM;
+
+ card = &ls_priv->snd_card;
+
+ card->dev = &pdev->dev;
+ card->owner = THIS_MODULE;
+ card->dai_link = loongson_dai_links;
+ card->num_links = ARRAY_SIZE(loongson_dai_links);
+ snd_soc_card_set_drvdata(card, ls_priv);
+
+ ret = device_property_read_string(&pdev->dev, "model", &card->name);
+ if (ret) {
+ dev_err(&pdev->dev, "Error parsing card name: %d\n", ret);
+ return ret;
+ }
+ ret = device_property_read_u32(&pdev->dev, "mclk-fs", &ls_priv->mclk_fs);
+ if (ret) {
+ dev_err(&pdev->dev, "Error parsing mclk-fs: %d\n", ret);
+ return ret;
+ }
+
+ if (has_acpi_companion(&pdev->dev))
+ ret = loongson_card_parse_acpi(ls_priv);
+ else
+ ret = loongson_card_parse_of(ls_priv);
+ if (ret < 0)
+ return ret;
+
+ ret = devm_snd_soc_register_card(&pdev->dev, card);
+
+ return ret;
+}
+
+static const struct of_device_id loongson_asoc_dt_ids[] = {
+ { .compatible = "loongson,ls-audio-card" },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, loongson_asoc_dt_ids);
+
+static struct platform_driver loongson_audio_driver = {
+ .probe = loongson_asoc_card_probe,
+ .driver = {
+ .name = "loongson-asoc-card",
+ .pm = &snd_soc_pm_ops,
+ .of_match_table = of_match_ptr(loongson_asoc_dt_ids),
+ },
+};
+module_platform_driver(loongson_audio_driver);
+
+MODULE_DESCRIPTION("Loongson ASoc Sound Card driver");
+MODULE_AUTHOR("Loongson Technology Corporation Limited");
+MODULE_LICENSE("GPL");