[PATCH v2 2/2] ASoC: qcom: add sdm845 sound card support

[Rohit kumar <rohitkr@codeaurora.org>]

This patch adds sdm845 audio machine driver support.

Signed-off-by: Rohit kumar <rohitkr@codeaurora.org>
---
 sound/soc/qcom/Kconfig  |   9 +
 sound/soc/qcom/Makefile |   2 +
 sound/soc/qcom/sdm845.c | 514 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 525 insertions(+)
 create mode 100644 sound/soc/qcom/sdm845.c

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 87838fa..09de50d 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -90,3 +90,12 @@ config SND_SOC_MSM8996
           Support for Qualcomm Technologies LPASS audio block in
           APQ8096 SoC-based systems.
           Say Y if you want to use audio device on this SoCs
+
+config SND_SOC_SDM845
+	tristate "SoC Machine driver for SDM845 boards"
+	depends on QCOM_APR
+	select SND_SOC_QDSP6
+	help
+	  To add support for audio on Qualcomm Technologies Inc.
+	  SDM845 SoC-based systems.
+          Say Y if you want to use audio device on this SoCs
diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
index 206945b..07f097a 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -14,10 +14,12 @@ obj-$(CONFIG_SND_SOC_LPASS_APQ8016) += snd-soc-lpass-apq8016.o
 snd-soc-storm-objs := storm.o
 snd-soc-apq8016-sbc-objs := apq8016_sbc.o
 snd-soc-apq8096-objs := apq8096.o
+snd-soc-sdm845-objs := sdm845.o
 
 obj-$(CONFIG_SND_SOC_STORM) += snd-soc-storm.o
 obj-$(CONFIG_SND_SOC_APQ8016_SBC) += snd-soc-apq8016-sbc.o
 obj-$(CONFIG_SND_SOC_MSM8996) += snd-soc-apq8096.o
+obj-$(CONFIG_SND_SOC_SDM845) += snd-soc-sdm845.o
 
 #DSP lib
 obj-$(CONFIG_SND_SOC_QDSP6) += qdsp6/
diff --git a/sound/soc/qcom/sdm845.c b/sound/soc/qcom/sdm845.c
new file mode 100644
index 0000000..531af82
--- /dev/null
+++ b/sound/soc/qcom/sdm845.c
@@ -0,0 +1,514 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/module.h>
+#include <linux/component.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/atomic.h>
+#include <linux/of_device.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <linux/soc/qcom/apr.h>
+#include "qdsp6/q6afe.h"
+
+#define DEFAULT_SAMPLE_RATE_48K		48000
+#define DEFAULT_MCLK_RATE		24576000
+#define DEFAULT_BCLK_RATE		1536000
+
+struct sdm845_snd_data {
+	struct snd_soc_card *card;
+	struct regulator *vdd_supply;
+	uint32_t pri_mi2s_clk_count;
+	uint32_t quat_tdm_clk_count;
+	struct snd_soc_dai_link dai_link[];
+};
+
+
+static unsigned int tdm_slot_offset[8] = {0, 4, 8, 12, 16, 20, 24, 28};
+
+static int sdm845_tdm_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 = rtd->cpu_dai;
+	int ret = 0;
+	int channels, slot_width;
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S32_LE:
+	case SNDRV_PCM_FORMAT_S24_LE:
+	case SNDRV_PCM_FORMAT_S16_LE:
+		slot_width = 32;
+		break;
+	default:
+		dev_err(rtd->dev, "%s: invalid param format 0x%x\n",
+				__func__, params_format(params));
+		return -EINVAL;
+	}
+
+	channels = params_channels(params);
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0x3,
+				channels, slot_width);
+		if (ret < 0) {
+			dev_err(rtd->dev, "%s: failed to set tdm slot, err:%d\n",
+					__func__, ret);
+			goto end;
+		}
+
+		ret = snd_soc_dai_set_channel_map(cpu_dai, 0, NULL,
+				channels, tdm_slot_offset);
+		if (ret < 0) {
+			dev_err(rtd->dev, "%s: failed to set channel map, err:%d\n",
+					__func__, ret);
+			goto end;
+		}
+	} else {
+		ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0xf, 0,
+				channels, slot_width);
+		if (ret < 0) {
+			dev_err(rtd->dev, "%s: failed to set tdm slot, err:%d\n",
+					__func__, ret);
+			goto end;
+		}
+
+		ret = snd_soc_dai_set_channel_map(cpu_dai, channels,
+				tdm_slot_offset, 0, NULL);
+		if (ret < 0) {
+			dev_err(rtd->dev, "%s: failed to set channel map, err:%d\n",
+					__func__, ret);
+			goto end;
+		}
+	}
+end:
+	return ret;
+}
+
+static int sdm845_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 = rtd->cpu_dai;
+	int ret = 0;
+
+	switch (cpu_dai->id) {
+	case QUATERNARY_TDM_RX_0:
+	case QUATERNARY_TDM_TX_0:
+		ret = sdm845_tdm_snd_hw_params(substream, params);
+		break;
+	default:
+		pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+		break;
+	}
+	return ret;
+}
+
+static int sdm845_snd_startup(struct snd_pcm_substream *substream)
+{
+	unsigned int fmt = SND_SOC_DAIFMT_CBS_CFS;
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_card *card = rtd->card;
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+
+	switch (cpu_dai->id) {
+	case PRIMARY_MI2S_RX:
+	case PRIMARY_MI2S_TX:
+		if (++(data->pri_mi2s_clk_count) == 1) {
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_MCLK_1,
+				DEFAULT_MCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
+				DEFAULT_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+		}
+		snd_soc_dai_set_fmt(cpu_dai, fmt);
+		break;
+
+	case QUATERNARY_TDM_RX_0:
+	case QUATERNARY_TDM_TX_0:
+		if (++(data->quat_tdm_clk_count) == 1) {
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_QUAD_TDM_IBIT,
+				DEFAULT_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
+		}
+		break;
+
+	default:
+		pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+		break;
+	}
+	return 0;
+}
+
+static void  sdm845_snd_shutdown(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_card *card = rtd->card;
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+
+	switch (cpu_dai->id) {
+	case PRIMARY_MI2S_RX:
+	case PRIMARY_MI2S_TX:
+		if (--(data->pri_mi2s_clk_count) == 0) {
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_MCLK_1,
+				0, SNDRV_PCM_STREAM_PLAYBACK);
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
+				0, SNDRV_PCM_STREAM_PLAYBACK);
+		};
+		break;
+
+	case QUATERNARY_TDM_RX_0:
+	case QUATERNARY_TDM_TX_0:
+		if (--(data->quat_tdm_clk_count) == 0) {
+			snd_soc_dai_set_sysclk(cpu_dai,
+				Q6AFE_LPASS_CLK_ID_QUAD_TDM_IBIT,
+				0, SNDRV_PCM_STREAM_PLAYBACK);
+		}
+		break;
+
+	default:
+		pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
+		break;
+	}
+}
+
+static struct snd_soc_ops sdm845_be_ops = {
+	.hw_params = sdm845_snd_hw_params,
+	.startup = sdm845_snd_startup,
+	.shutdown = sdm845_snd_shutdown,
+};
+
+static int sdm845_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 = DEFAULT_SAMPLE_RATE_48K;
+	channels->min = channels->max = 2;
+
+	return 0;
+}
+
+static struct sdm845_snd_data *sdm845_sbc_parse_of(struct snd_soc_card *card)
+{
+	struct device *dev = card->dev;
+	struct snd_soc_dai_link *link;
+	struct device_node *np, *codec, *platform, *cpu, *node;
+	int ret, num_links;
+	struct sdm845_snd_data *data;
+
+	ret = snd_soc_of_parse_card_name(card, "qcom,model");
+	if (ret) {
+		dev_err(dev, "Error parsing card name: %d\n", ret);
+		return ERR_PTR(ret);
+	}
+
+	node = dev->of_node;
+
+	/* DAPM routes */
+	if (of_property_read_bool(node, "qcom,audio-routing")) {
+		ret = snd_soc_of_parse_audio_routing(card,
+					"qcom,audio-routing");
+		if (ret)
+			return ERR_PTR(ret);
+	}
+
+	/* Populate links */
+	num_links = of_get_child_count(node);
+
+	/* Allocate the private data and the DAI link array */
+	data = kzalloc(sizeof(*data) + sizeof(*link) * num_links,
+			GFP_KERNEL);
+	if (!data)
+		return ERR_PTR(-ENOMEM);
+
+	card->dai_link = &data->dai_link[0];
+	card->num_links = num_links;
+
+	link = data->dai_link;
+	data->card = card;
+
+	for_each_child_of_node(node, np) {
+		cpu = of_get_child_by_name(np, "cpu");
+		if (!cpu) {
+			dev_err(dev, "Can't find cpu DT node\n");
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
+		if (!link->cpu_of_node) {
+			dev_err(card->dev, "error getting cpu phandle\n");
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
+		if (ret) {
+			dev_err(card->dev, "error getting cpu dai name\n");
+			goto fail;
+		}
+
+		platform = of_get_child_by_name(np, "platform");
+		codec = of_get_child_by_name(np, "codec");
+		if (codec && platform) {
+			link->platform_of_node = of_parse_phandle(platform,
+					"sound-dai", 0);
+			if (!link->platform_of_node) {
+				dev_err(card->dev, "error getting platform phandle\n");
+				ret = -EINVAL;
+				goto fail;
+			}
+
+			ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
+			if (ret < 0) {
+				dev_err(card->dev, "error getting codec dai name\n");
+				goto fail;
+			}
+			link->no_pcm = 1;
+			link->ignore_pmdown_time = 1;
+			link->ops = &sdm845_be_ops;
+			link->be_hw_params_fixup = sdm845_be_hw_params_fixup;
+		} else {
+			link->platform_of_node = link->cpu_of_node;
+			link->codec_dai_name = "snd-soc-dummy-dai";
+			link->codec_name = "snd-soc-dummy";
+			link->dynamic = 1;
+		}
+
+		link->ignore_suspend = 1;
+		ret = of_property_read_string(np, "link-name", &link->name);
+		if (ret) {
+			dev_err(card->dev,
+				"error getting codec dai_link name\n");
+			goto fail;
+		}
+
+		link->dpcm_playback = 1;
+		link->dpcm_capture = 1;
+		link->stream_name = link->name;
+		link++;
+	}
+	dev_set_drvdata(dev, card);
+	snd_soc_card_set_drvdata(card, data);
+
+	return data;
+fail:
+	kfree(data);
+	return ERR_PTR(ret);
+}
+
+static void sdm845_init_supplies(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+	data->vdd_supply = regulator_get(dev, "cdc-vdd");
+	if (IS_ERR(data->vdd_supply)) {
+		dev_err(dev, "Unable to get regulator supplies\n");
+		data->vdd_supply = NULL;
+		return;
+	}
+
+	if (regulator_enable(data->vdd_supply))
+		dev_err(dev, "Unable to enable vdd supply\n");
+}
+
+static void sdm845_deinit_supplies(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+	if (!data->vdd_supply)
+		return;
+
+	regulator_disable(data->vdd_supply);
+	regulator_put(data->vdd_supply);
+}
+
+static int sdm845_bind(struct device *dev)
+{
+	struct snd_soc_card *card;
+	struct sdm845_snd_data *data;
+	int ret;
+
+	card = kzalloc(sizeof(*card), GFP_KERNEL);
+	if (!card)
+		return -ENOMEM;
+
+	ret = component_bind_all(dev, card);
+	if (ret) {
+		dev_err(dev, "Audio components bind failed: %d\n", ret);
+		goto bind_fail;
+	}
+
+	card->dev = dev;
+	data = sdm845_sbc_parse_of(card);
+	if (IS_ERR_OR_NULL(data)) {
+		dev_err(dev, "Error parsing OF data\n");
+		goto parse_dt_fail;
+	}
+	sdm845_init_supplies(dev);
+
+	ret = snd_soc_register_card(card);
+	if (ret) {
+		dev_err(dev, "Sound card registration failed\n");
+		goto register_card_fail;
+	}
+	return ret;
+
+register_card_fail:
+	sdm845_deinit_supplies(dev);
+	kfree(data);
+parse_dt_fail:
+	component_unbind_all(dev, card);
+bind_fail:
+	kfree(card);
+	return ret;
+}
+
+static void sdm845_unbind(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+	if (data->vdd_supply)
+		regulator_put(data->vdd_supply);
+	component_unbind_all(dev, card);
+	snd_soc_unregister_card(card);
+	kfree(data);
+	kfree(card);
+}
+
+static const struct component_master_ops sdm845_ops = {
+	.bind = sdm845_bind,
+	.unbind = sdm845_unbind,
+};
+
+static int sdm845_runtime_resume(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+	if (!data->vdd_supply) {
+		dev_dbg(dev, "no supplies defined\n");
+		return 0;
+	}
+
+	if (regulator_enable(data->vdd_supply))
+		dev_err(dev, "Enable regulator supply failed\n");
+
+	return 0;
+}
+
+static int sdm845_runtime_suspend(struct device *dev)
+{
+	struct snd_soc_card *card = dev_get_drvdata(dev);
+	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
+
+	if (!data->vdd_supply) {
+		dev_dbg(dev, "no supplies defined\n");
+		return 0;
+	}
+
+	if (regulator_disable(data->vdd_supply))
+		dev_err(dev, "Disable regulator supply failed\n");
+
+	return 0;
+}
+
+static const struct dev_pm_ops sdm845_pm_ops = {
+	SET_RUNTIME_PM_OPS(sdm845_runtime_suspend,
+			sdm845_runtime_resume, NULL)
+};
+
+static int sdm845_compare_of(struct device *dev, void *data)
+{
+	return dev->of_node == data;
+}
+
+static void sdm845_release_of(struct device *dev, void *data)
+{
+	of_node_put(data);
+}
+
+static int add_audio_components(struct device *dev,
+				struct component_match **matchptr)
+{
+	struct device_node *np, *platform, *cpu, *node, *dai_node;
+
+	node = dev->of_node;
+
+	for_each_child_of_node(node, np) {
+		cpu = of_get_child_by_name(np, "cpu");
+		if (cpu) {
+			dai_node = of_parse_phandle(cpu, "sound-dai", 0);
+			of_node_get(dai_node);
+			component_match_add_release(dev, matchptr,
+					sdm845_release_of,
+					sdm845_compare_of,
+					dai_node);
+		}
+
+		platform = of_get_child_by_name(np, "platform");
+		if (platform) {
+			dai_node = of_parse_phandle(platform, "sound-dai", 0);
+			component_match_add_release(dev, matchptr,
+					sdm845_release_of,
+					sdm845_compare_of,
+					dai_node);
+		}
+	}
+
+	return 0;
+}
+
+static int sdm845_snd_platform_probe(struct platform_device *pdev)
+{
+	struct component_match *match = NULL;
+	int ret;
+
+	ret = add_audio_components(&pdev->dev, &match);
+	if (ret)
+		return ret;
+
+	return component_master_add_with_match(&pdev->dev, &sdm845_ops, match);
+}
+
+static int sdm845_snd_platform_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &sdm845_ops);
+	return 0;
+}
+
+static const struct of_device_id sdm845_snd_device_id[]  = {
+	{ .compatible = "qcom,sdm845-sndcard" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, sdm845_snd_device_id);
+
+static struct platform_driver sdm845_snd_driver = {
+	.probe = sdm845_snd_platform_probe,
+	.remove = sdm845_snd_platform_remove,
+	.driver = {
+		.name = "msm-snd-sdm845",
+		.pm = &sdm845_pm_ops,
+		.owner = THIS_MODULE,
+		.of_match_table = sdm845_snd_device_id,
+	},
+};
+module_platform_driver(sdm845_snd_driver);
+
+MODULE_DESCRIPTION("sdm845 ASoC Machine Driver");
+MODULE_LICENSE("GPL v2");
-- 
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is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.