linux-kernel - [PATCH 07/19] ASoC: amd: ps: add soundwire dma driver for pink sardine platform

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Message-ID: <20230111090222.2016499-8-Vijendar.Mukunda@amd.com>
Date:   Wed, 11 Jan 2023 14:32:10 +0530
From:   Vijendar Mukunda <Vijendar.Mukunda@....com>
To:     <broonie@...nel.org>, <vkoul@...nel.org>,
        <alsa-devel@...a-project.org>
CC:     <Basavaraj.Hiregoudar@....com>, <Sunil-kumar.Dommati@....com>,
        <Mario.Limonciello@....com>, <Mastan.Katragadda@....com>,
        <arungopal.kondaveeti@....com>,
        Vijendar Mukunda <Vijendar.Mukunda@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Syed Saba Kareem <Syed.SabaKareem@....com>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 07/19] ASoC: amd: ps: add soundwire dma driver for pink sardine platform

Soundwire DMA platform driver binds to the platform device created by
ACP PCI device. Soundwire DMA driver registers ALSA DMA component
with ASoC framework.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/amd/ps/acp63.h      |  5 +++
 sound/soc/amd/ps/ps-sdw-dma.c | 72 +++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+)
 create mode 100644 sound/soc/amd/ps/ps-sdw-dma.c

diff --git a/sound/soc/amd/ps/acp63.h b/sound/soc/amd/ps/acp63.h
index 0bd9dc363461..b462320fdf2a 100644
--- a/sound/soc/amd/ps/acp63.h
+++ b/sound/soc/amd/ps/acp63.h
@@ -135,3 +135,8 @@ struct acp63_dev_data {
 	bool is_sdw_dev;
 	bool acp_sdw_power_off;
 };
+
+struct sdw_dma_dev_data {
+	void __iomem *acp_base;
+	struct mutex *acp_lock;
+};
diff --git a/sound/soc/amd/ps/ps-sdw-dma.c b/sound/soc/amd/ps/ps-sdw-dma.c
new file mode 100644
index 000000000000..388a4b7df715
--- /dev/null
+++ b/sound/soc/amd/ps/ps-sdw-dma.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * AMD ALSA SoC Pink Sardine Soundwire DMA Driver
+ *
+ * Copyright 2023 Advanced Micro Devices, Inc.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include "acp63.h"
+
+#define DRV_NAME "amd_ps_sdw_dma"
+
+static const struct snd_soc_component_driver acp63_sdw_component = {
+	.name		= DRV_NAME,
+};
+
+static int acp63_sdw_platform_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct sdw_dma_dev_data *sdw_data;
+	int status;
+
+	if (!pdev->dev.platform_data) {
+		dev_err(&pdev->dev, "platform_data not retrieved\n");
+		return -ENODEV;
+	}
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
+		return -ENODEV;
+	}
+
+	sdw_data = devm_kzalloc(&pdev->dev, sizeof(*sdw_data), GFP_KERNEL);
+	if (!sdw_data)
+		return -ENOMEM;
+
+	sdw_data->acp_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+	if (!sdw_data->acp_base)
+		return -ENOMEM;
+
+	sdw_data->acp_lock = pdev->dev.platform_data;
+	dev_set_drvdata(&pdev->dev, sdw_data);
+	status = devm_snd_soc_register_component(&pdev->dev,
+						 &acp63_sdw_component,
+						 NULL, 0);
+	if (status) {
+		dev_err(&pdev->dev, "Fail to register acp pdm dai\n");
+
+		return -ENODEV;
+	}
+	return 0;
+}
+
+static struct platform_driver acp63_sdw_dma_driver = {
+	.probe = acp63_sdw_platform_probe,
+	.driver = {
+		.name = "amd_ps_sdw_dma",
+	},
+};
+
+module_platform_driver(acp63_sdw_dma_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@....com");
+MODULE_DESCRIPTION("AMD ACP6.3 PS SDW DMA Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
-- 
2.34.1