ASoC: qcom: add machine driver for sm8450rb5-audioreach

Add machine driver for sm8450 SoC.

This intial supports only includes WSA883x Speakers and WCD938x based headset.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

3 files changed, 158 insertions, 0 deletions

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 96a6d4731e6fd..0c6105434c756 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -175,6 +175,17 @@ config SND_SOC_SM8250
 	  SM8250 SoC-based systems.
 	  Say Y if you want to use audio device on this SoCs.
 
+config SND_SOC_SM8450
+	tristate "SoC Machine driver for SM8450 boards"
+	depends on QCOM_APR && SOUNDWIRE
+	depends on COMMON_CLK
+	select SND_SOC_QDSP6
+	select SND_SOC_QCOM_COMMON
+	help
+	  To add support for audio on Qualcomm Technologies Inc.
+	  SM8450 SoC-based systems.
+	  Say Y if you want to use audio device on this SoCs.
+
 config SND_SOC_SC8280XP
 	tristate "SoC Machine driver for SC8280XP boards"
 	depends on QCOM_APR && SOUNDWIRE
diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
index 8b97172cf990f..19a8b49706fb4 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -26,6 +26,7 @@ snd-soc-sc7180-objs := sc7180.o
 snd-soc-sc7280-objs := sc7280.o
 snd-soc-sdm845-objs := sdm845.o
 snd-soc-sm8250-objs := sm8250.o
+snd-soc-sm8450-objs := sm8450.o
 snd-soc-sc8280xp-objs := sc8280xp.o
 snd-soc-qcom-common-objs := common.o
 
@@ -37,6 +38,7 @@ obj-$(CONFIG_SND_SOC_SC7280) += snd-soc-sc7280.o
 obj-$(CONFIG_SND_SOC_SC8280XP) += snd-soc-sc8280xp.o
 obj-$(CONFIG_SND_SOC_SDM845) += snd-soc-sdm845.o
 obj-$(CONFIG_SND_SOC_SM8250) += snd-soc-sm8250.o
+obj-$(CONFIG_SND_SOC_SM8450) += snd-soc-sc8450.o
 obj-$(CONFIG_SND_SOC_QCOM_COMMON) += snd-soc-qcom-common.o
 
 #DSP lib
diff --git a/sound/soc/qcom/sm8450.c b/sound/soc/qcom/sm8450.c
new file mode 100644
index 0000000000000..2322ef1d0babe
--- /dev/null
+++ b/sound/soc/qcom/sm8450.c
@@ -0,0 +1,145 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2022, Linaro Limited
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/pcm.h>
+#include <linux/soundwire/sdw.h>
+#include <sound/jack.h>
+#include <linux/input-event-codes.h>
+#include "qdsp6/q6afe.h"
+#include "common.h"
+
+#define DRIVER_NAME		"sm8450"
+
+struct sm8450_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 sm8450_snd_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct sm8450_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+
+	return qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
+}
+
+static int sm8450_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+				     struct snd_pcm_hw_params *params)
+{
+	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;
+	channels->min = 1;
+	channels->max = 2;
+
+	return 0;
+}
+
+static int sm8450_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 = asoc_rtd_to_cpu(rtd, 0);
+	struct sm8450_snd_data *pdata = snd_soc_card_get_drvdata(rtd->card);
+
+	return qcom_snd_sdw_hw_params(substream, params, &pdata->sruntime[cpu_dai->id]);
+}
+
+static int sm8450_snd_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+	struct sm8450_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 sm8450_snd_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct sm8450_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+	struct snd_soc_dai *cpu_dai = asoc_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 sm8450_be_ops = {
+	.hw_params = sm8450_snd_hw_params,
+	.hw_free = sm8450_snd_hw_free,
+	.prepare = sm8450_snd_prepare,
+};
+
+static void sm8450_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 = sm8450_snd_init;
+			link->be_hw_params_fixup = sm8450_be_hw_params_fixup;
+			link->ops = &sm8450_be_ops;
+		}
+	}
+}
+
+static int sm8450_platform_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card;
+	struct sm8450_snd_data *data;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
+	if (!card)
+		return -ENOMEM;
+	card->owner = THIS_MODULE;
+	/* Allocate the private data */
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	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 = DRIVER_NAME;
+	sm8450_add_be_ops(card);
+	return devm_snd_soc_register_card(dev, card);
+}
+
+static const struct of_device_id snd_sm8450_dt_match[] = {
+	{.compatible = "qcom,sm8450-sndcard",},
+	{}
+};
+
+MODULE_DEVICE_TABLE(of, snd_sm8450_dt_match);
+
+static struct platform_driver snd_sm8450_driver = {
+	.probe  = sm8450_platform_probe,
+	.driver = {
+		.name = "snd-sm8450",
+		.of_match_table = snd_sm8450_dt_match,
+	},
+};
+module_platform_driver(snd_sm8450_driver);
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
+MODULE_DESCRIPTION("SM8450 ASoC Machine Driver");
+MODULE_LICENSE("GPL v2");