[PATCH 1/2] ASoC: qcom: Add x1e80100 sound machine driver

[Krzysztof Kozlowski]

Add sound machine driver for the soundcards on Qualcomm X1E80100 SoC,
supporting up to four channel audio playback over Soundwire bus.  The
driver is based on existing sc8280xp.c driver.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
---
 sound/soc/qcom/Kconfig    |  12 +++
 sound/soc/qcom/Makefile   |   2 +
 sound/soc/qcom/x1e80100.c | 168 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 182 insertions(+)
 create mode 100644 sound/soc/qcom/x1e80100.c

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index e7b00d1d9e99..762491d6f2f2 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -221,4 +221,16 @@ config SND_SOC_SC7280
 	  SC7280 SoC-based systems.
 	  Say Y or M if you want to use audio device on this SoCs.
 
+config SND_SOC_X1E80100
+	tristate "SoC Machine driver for X1E80100 boards"
+	depends on QCOM_APR && SOUNDWIRE
+	depends on COMMON_CLK
+	select SND_SOC_QDSP6
+	select SND_SOC_QCOM_COMMON
+	select SND_SOC_QCOM_SDW
+	help
+	  Add support for audio on Qualcomm Technologies Inc.
+	  X1E80100 SoC-based systems.
+	  Say Y or M if you want to use audio device on this SoCs.
+
 endif #SND_SOC_QCOM
diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
index 254350d9dc06..34f3fcb8ee9a 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -29,6 +29,7 @@ snd-soc-sm8250-objs := sm8250.o
 snd-soc-sc8280xp-objs := sc8280xp.o
 snd-soc-qcom-common-objs := common.o
 snd-soc-qcom-sdw-objs := sdw.o
+snd-soc-x1e80100-objs := x1e80100.o
 
 obj-$(CONFIG_SND_SOC_STORM) += snd-soc-storm.o
 obj-$(CONFIG_SND_SOC_APQ8016_SBC) += snd-soc-apq8016-sbc.o
@@ -40,6 +41,7 @@ obj-$(CONFIG_SND_SOC_SDM845) += snd-soc-sdm845.o
 obj-$(CONFIG_SND_SOC_SM8250) += snd-soc-sm8250.o
 obj-$(CONFIG_SND_SOC_QCOM_COMMON) += snd-soc-qcom-common.o
 obj-$(CONFIG_SND_SOC_QCOM_SDW) += snd-soc-qcom-sdw.o
+obj-$(CONFIG_SND_SOC_X1E80100) += snd-soc-x1e80100.o
 
 #DSP lib
 obj-$(CONFIG_SND_SOC_QDSP6) += qdsp6/
diff --git a/sound/soc/qcom/x1e80100.c b/sound/soc/qcom/x1e80100.c
new file mode 100644
index 000000000000..c3c8bf7ffb5b
--- /dev/null
+++ b/sound/soc/qcom/x1e80100.c
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2023, Linaro Limited
+
+#include <dt-bindings/sound/qcom,q6afe.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/soundwire/sdw.h>
+#include <sound/pcm.h>
+#include <sound/jack.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include "common.h"
+#include "qdsp6/q6afe.h"
+#include "sdw.h"
+
+struct x1e80100_snd_data {
+	bool stream_prepared[AFE_PORT_MAX];
+	struct snd_soc_card *card;
+	struct sdw_stream_runtime *sruntime[AFE_PORT_MAX];
+	struct snd_soc_jack jack;
+	bool jack_setup;
+};
+
+static int x1e80100_snd_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct x1e80100_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+
+	return qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
+}
+
+static void x1e80100_snd_shutdown(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
+	struct x1e80100_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+	struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
+
+	data->sruntime[cpu_dai->id] = NULL;
+	sdw_release_stream(sruntime);
+}
+
+static int x1e80100_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+				     struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
+	struct snd_interval *rate = hw_param_interval(params,
+						      SNDRV_PCM_HW_PARAM_RATE);
+	struct snd_interval *channels = hw_param_interval(params,
+							  SNDRV_PCM_HW_PARAM_CHANNELS);
+
+	rate->min = rate->max = 48000;
+	switch (cpu_dai->id) {
+	case TX_CODEC_DMA_TX_0:
+	case TX_CODEC_DMA_TX_1:
+	case TX_CODEC_DMA_TX_2:
+	case TX_CODEC_DMA_TX_3:
+		channels->min = 1;
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int x1e80100_snd_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 = snd_soc_rtd_to_cpu(rtd, 0);
+	struct x1e80100_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+
+	return qcom_snd_sdw_hw_params(substream, params, &data->sruntime[cpu_dai->id]);
+}
+
+static int x1e80100_snd_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
+	struct x1e80100_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+	struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
+
+	return qcom_snd_sdw_prepare(substream, sruntime,
+				    &data->stream_prepared[cpu_dai->id]);
+}
+
+static int x1e80100_snd_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct x1e80100_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
+	struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
+
+	return qcom_snd_sdw_hw_free(substream, sruntime,
+				    &data->stream_prepared[cpu_dai->id]);
+}
+
+static const struct snd_soc_ops x1e80100_be_ops = {
+	.startup = qcom_snd_sdw_startup,
+	.shutdown = x1e80100_snd_shutdown,
+	.hw_params = x1e80100_snd_hw_params,
+	.hw_free = x1e80100_snd_hw_free,
+	.prepare = x1e80100_snd_prepare,
+};
+
+static void x1e80100_add_be_ops(struct snd_soc_card *card)
+{
+	struct snd_soc_dai_link *link;
+	int i;
+
+	for_each_card_prelinks(card, i, link) {
+		if (link->no_pcm == 1) {
+			link->init = x1e80100_snd_init;
+			link->be_hw_params_fixup = x1e80100_be_hw_params_fixup;
+			link->ops = &x1e80100_be_ops;
+		}
+	}
+}
+
+static int x1e80100_platform_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card;
+	struct x1e80100_snd_data *data;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
+	if (!card)
+		return -ENOMEM;
+	/* Allocate the private data */
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	card->owner = THIS_MODULE;
+	card->dev = dev;
+	dev_set_drvdata(dev, card);
+	snd_soc_card_set_drvdata(card, data);
+
+	ret = qcom_snd_parse_of(card);
+	if (ret)
+		return ret;
+
+	card->driver_name = "x1e80100";
+	x1e80100_add_be_ops(card);
+
+	return devm_snd_soc_register_card(dev, card);
+}
+
+static const struct of_device_id snd_x1e80100_dt_match[] = {
+	{ .compatible = "qcom,x1e80100-sndcard", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, snd_x1e80100_dt_match);
+
+static struct platform_driver snd_x1e80100_driver = {
+	.probe  = x1e80100_platform_probe,
+	.driver = {
+		.name = "snd-x1e80100",
+		.of_match_table = snd_x1e80100_dt_match,
+	},
+};
+module_platform_driver(snd_x1e80100_driver);
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx");
+MODULE_AUTHOR("Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Qualcomm X1E80100 ASoC Machine Driver");
+MODULE_LICENSE("GPL");
-- 
2.34.1