[PATCH v2 10/11] ASoC: qcom: add sdm660 sound card support

[Richard Acayan <mailingradian@gmail.com>]

The Snapdragon 670 and Snapdragon 660 share the sound card, which can
have digital/analog WCD, WCD9335, WCD934X, or board-specific sound
codecs. Add support for the sound card.

Signed-off-by: Richard Acayan <mailingradian@gmail.com>
---
 sound/soc/qcom/Kconfig  |  12 +++
 sound/soc/qcom/Makefile |   2 +
 sound/soc/qcom/sdm660.c | 192 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 206 insertions(+)
 create mode 100644 sound/soc/qcom/sdm660.c

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index e6e24f3b9922..2ef4c436e534 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -167,6 +167,18 @@ config SND_SOC_MSM8996
 	  APQ8096 SoC-based systems.
 	  Say Y if you want to use audio device on this SoCs
 
+config SND_SOC_SDM660
+	tristate "SoC Machine driver for SDM660 and SDM670 boards"
+	depends on QCOM_APR
+	depends on OF
+	depends on PM
+	select SND_SOC_QDSP6
+	select SND_SOC_QCOM_COMMON
+	help
+	  This adds support for audio on Qualcomm Technologies Inc.
+	  SDM660 and SDM670 SoC-based systems.
+	  Say Y if you want to use audio devices on these SoCs.
+
 config SND_SOC_SDM845
 	tristate "SoC Machine driver for SDM845 boards"
 	depends on QCOM_APR && I2C && SOUNDWIRE
diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
index 985ce2ae286b..8b6bdc19e780 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -24,6 +24,7 @@ snd-soc-apq8016-sbc-y := apq8016_sbc.o
 snd-soc-apq8096-y := apq8096.o
 snd-soc-sc7180-y := sc7180.o
 snd-soc-sc7280-y := sc7280.o
+snd-soc-sdm660-y := sdm660.o
 snd-soc-sdm845-y := sdm845.o
 snd-soc-sm8250-y := sm8250.o
 snd-soc-sc8280xp-y := sc8280xp.o
@@ -38,6 +39,7 @@ obj-$(CONFIG_SND_SOC_MSM8996) += snd-soc-apq8096.o
 obj-$(CONFIG_SND_SOC_SC7180) += snd-soc-sc7180.o
 obj-$(CONFIG_SND_SOC_SC7280) += snd-soc-sc7280.o
 obj-$(CONFIG_SND_SOC_SC8280XP) += snd-soc-sc8280xp.o
+obj-$(CONFIG_SND_SOC_SDM660) += snd-soc-sdm660.o
 obj-$(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
diff --git a/sound/soc/qcom/sdm660.c b/sound/soc/qcom/sdm660.c
new file mode 100644
index 000000000000..8dae01b733dd
--- /dev/null
+++ b/sound/soc/qcom/sdm660.c
@@ -0,0 +1,192 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2015-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2023, Richard Acayan. All rights reserved.
+ */
+
+#include <dt-bindings/sound/qcom,q6dsp-lpass-ports.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/jack.h>
+#include <sound/soc.h>
+#include <sound/soc-card.h>
+#include <sound/soc-dai.h>
+#include <sound/soc-dapm.h>
+#include <sound/soc-jack.h>
+
+#include "common.h"
+#include "qdsp6/q6afe.h"
+
+#define DEFAULT_SAMPLE_RATE_48K		48000
+#define DEFAULT_INT_MCLK_RATE		9600000
+#define MI2S_BCLK_RATE			1536000
+
+struct sdm660_snd_data {
+	struct snd_soc_jack jack;
+	bool jack_setup;
+	uint32_t int0_mi2s_clk_count;
+	uint32_t int3_mi2s_clk_count;
+};
+
+static int snd_sdm660_startup(struct snd_pcm_substream *stream)
+{
+	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(stream);
+	struct sdm660_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+	struct snd_soc_dai *cpu = snd_soc_rtd_to_cpu(rtd, 0);
+
+	switch (cpu->id) {
+	case INT0_MI2S_RX:
+		data->int0_mi2s_clk_count++;
+		if (data->int0_mi2s_clk_count == 1)
+			snd_soc_dai_set_sysclk(cpu,
+				Q6AFE_LPASS_CLK_ID_INT0_MI2S_IBIT,
+				MI2S_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+
+		snd_soc_dai_set_fmt(cpu, SND_SOC_DAIFMT_CBP_CFP);
+
+		break;
+	case INT3_MI2S_TX:
+		data->int3_mi2s_clk_count++;
+		if (data->int3_mi2s_clk_count == 1)
+			snd_soc_dai_set_sysclk(cpu,
+				Q6AFE_LPASS_CLK_ID_INT3_MI2S_IBIT,
+				MI2S_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+
+		snd_soc_dai_set_fmt(cpu, SND_SOC_DAIFMT_CBP_CFP);
+
+		break;
+	default:
+		dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__,
+			cpu->id);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void snd_sdm660_shutdown(struct snd_pcm_substream *stream)
+{
+	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(stream);
+	struct sdm660_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
+	struct snd_soc_dai *cpu = snd_soc_rtd_to_cpu(rtd, 0);
+
+	switch (cpu->id) {
+	case INT0_MI2S_RX:
+		data->int0_mi2s_clk_count--;
+		if (data->int0_mi2s_clk_count == 0)
+			snd_soc_dai_set_sysclk(cpu,
+				Q6AFE_LPASS_CLK_ID_INT0_MI2S_IBIT,
+				0, SNDRV_PCM_STREAM_PLAYBACK);
+
+		break;
+	case INT3_MI2S_TX:
+		data->int3_mi2s_clk_count--;
+		if (data->int3_mi2s_clk_count == 0)
+			snd_soc_dai_set_sysclk(cpu,
+				Q6AFE_LPASS_CLK_ID_INT3_MI2S_IBIT,
+				0, SNDRV_PCM_STREAM_PLAYBACK);
+
+		break;
+	default:
+		dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__,
+			cpu->id);
+		break;
+	}
+}
+
+static const struct snd_soc_ops sdm660_ops = {
+	.startup = snd_sdm660_startup,
+	.shutdown = snd_sdm660_shutdown,
+};
+
+static int sdm660_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);
+	struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+
+	rate->min = rate->max = DEFAULT_SAMPLE_RATE_48K;
+	snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
+
+	channels->min = channels->max = 2;
+
+	return 0;
+}
+
+static int sdm660_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_card *card = rtd->card;
+	struct sdm660_snd_data *data = snd_soc_card_get_drvdata(card);
+
+	return qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
+}
+
+static void snd_sdm660_add_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->ops = &sdm660_ops;
+			link->be_hw_params_fixup = sdm660_be_hw_params_fixup;
+		}
+
+		link->init = sdm660_dai_init;
+	}
+}
+
+static int snd_sdm660_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card;
+	struct sdm660_snd_data *data;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	card = devm_kzalloc(dev, sizeof(struct snd_soc_card), GFP_KERNEL);
+	if (!card)
+		return -ENOMEM;
+
+	data = devm_kzalloc(dev, sizeof(struct sdm660_snd_data), GFP_KERNEL);
+	if (!card)
+		return -ENOMEM;
+
+	card->driver_name = "sdm660";
+	card->dev = dev;
+	card->owner = THIS_MODULE;
+
+	ret = qcom_snd_parse_of(card);
+	if (ret)
+		return ret;
+
+	snd_soc_card_set_drvdata(card, data);
+
+	snd_sdm660_add_ops(card);
+
+	return devm_snd_soc_register_card(dev, card);
+}
+
+static const struct of_device_id snd_sdm660_device_id[] = {
+	{ .compatible = "qcom,sdm660-sndcard", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, snd_sdm660_device_id);
+
+static struct platform_driver snd_sdm660_driver = {
+	.probe = snd_sdm660_probe,
+	.driver = {
+		.name = "sdm660-sndcard",
+		.of_match_table = snd_sdm660_device_id,
+		.pm = &snd_soc_pm_ops,
+	},
+};
+module_platform_driver(snd_sdm660_driver);
+
+MODULE_DESCRIPTION("sdm660 ASoC Machine Driver");
+MODULE_LICENSE("GPL");
-- 
2.53.0