[PATCH 01/19] ASoC: amd: ps: create platform devices based on acp config

[Vijendar Mukunda <Vijendar.Mukunda@amd.com>]

Create platform devices for sdw controllers and PDM controller
based on ACP pin config selection and ACPI fw handle for
pink sardine platform.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Signed-off-by: Mastan Katragadda <Mastan.Katragadda@amd.com>
---
 include/linux/soundwire/sdw_amd.h |  18 +++
 sound/soc/amd/ps/acp63.h          |  24 ++-
 sound/soc/amd/ps/pci-ps.c         | 248 ++++++++++++++++++++++++++++--
 3 files changed, 277 insertions(+), 13 deletions(-)
 create mode 100644 include/linux/soundwire/sdw_amd.h

diff --git a/include/linux/soundwire/sdw_amd.h b/include/linux/soundwire/sdw_amd.h
new file mode 100644
index 000000000000..f0123815af46
--- /dev/null
+++ b/include/linux/soundwire/sdw_amd.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.
+ */
+
+#ifndef __SDW_AMD_H
+#define __SDW_AMD_H
+
+#include <linux/soundwire/sdw.h>
+
+#define AMD_SDW_CLK_STOP_MODE		1
+#define AMD_SDW_POWER_OFF_MODE		2
+
+struct acp_sdw_pdata {
+	u16 instance;
+	struct mutex *sdw_lock;
+};
+#endif
diff --git a/sound/soc/amd/ps/acp63.h b/sound/soc/amd/ps/acp63.h
index b7535c7d093f..ed979e6d0c1d 100644
--- a/sound/soc/amd/ps/acp63.h
+++ b/sound/soc/amd/ps/acp63.h
@@ -10,7 +10,7 @@
 #define ACP_DEVICE_ID 0x15E2
 #define ACP63_REG_START		0x1240000
 #define ACP63_REG_END		0x1250200
-#define ACP63_DEVS		3
+#define ACP63_DEVS		5
 
 #define ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK	0x00010001
 #define ACP_PGFSM_CNTL_POWER_ON_MASK	1
@@ -55,8 +55,14 @@
 
 #define ACP63_DMIC_ADDR		2
 #define ACP63_PDM_MODE_DEVS		3
-#define ACP63_PDM_DEV_MASK		1
 #define ACP_DMIC_DEV	2
+#define ACP63_SDW0_MODE_DEVS		2
+#define ACP63_SDW0_SDW1_MODE_DEVS	3
+#define ACP63_SDW0_PDM_MODE_DEVS	4
+#define ACP63_SDW0_SDW1_PDM_MODE_DEVS   5
+#define ACP63_DMIC_ADDR			2
+#define ACP63_SDW_ADDR			5
+#define AMD_SDW_MAX_CONTROLLERS		2
 
 enum acp_config {
 	ACP_CONFIG_0 = 0,
@@ -77,6 +83,12 @@ enum acp_config {
 	ACP_CONFIG_15,
 };
 
+enum acp_pdev_mask {
+	ACP63_PDM_DEV_MASK = 1,
+	ACP63_SDW_DEV_MASK,
+	ACP63_SDW_PDM_DEV_MASK,
+};
+
 struct pdm_stream_instance {
 	u16 num_pages;
 	u16 channels;
@@ -107,7 +119,15 @@ struct acp63_dev_data {
 	struct resource *res;
 	struct platform_device *pdev[ACP63_DEVS];
 	struct mutex acp_lock; /* protect shared registers */
+	struct fwnode_handle *sdw_fw_node;
 	u16 pdev_mask;
 	u16 pdev_count;
 	u16 pdm_dev_index;
+	u8 sdw_master_count;
+	u16 sdw0_dev_index;
+	u16 sdw1_dev_index;
+	u16 sdw_dma_dev_index;
+	bool is_dmic_dev;
+	bool is_sdw_dev;
+	bool acp_sdw_power_off;
 };
diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
index e86f23d97584..85154cf0b2a2 100644
--- a/sound/soc/amd/ps/pci-ps.c
+++ b/sound/soc/amd/ps/pci-ps.c
@@ -14,6 +14,7 @@
 #include <linux/interrupt.h>
 #include <sound/pcm_params.h>
 #include <linux/pm_runtime.h>
+#include <linux/soundwire/sdw_amd.h>
 
 #include "acp63.h"
 
@@ -134,12 +135,68 @@ static irqreturn_t acp63_irq_handler(int irq, void *dev_id)
 	return IRQ_NONE;
 }
 
-static void get_acp63_device_config(u32 config, struct pci_dev *pci,
-				    struct acp63_dev_data *acp_data)
+static int sdw_amd_scan_controller(struct device *dev)
+{
+	struct acp63_dev_data *acp_data;
+	struct fwnode_handle *link;
+	char name[32];
+	u8 count = 0;
+	u32 acp_sdw_power_mode = 0;
+	int index;
+	int ret;
+
+	acp_data = dev_get_drvdata(dev);
+	acp_data->acp_sdw_power_off = true;
+	/* Found controller, find links supported */
+	ret = fwnode_property_read_u8_array((acp_data->sdw_fw_node),
+					    "mipi-sdw-master-count", &count, 1);
+
+	if (ret) {
+		dev_err(dev,
+			"Failed to read mipi-sdw-master-count: %d\n", ret);
+		return -EINVAL;
+	}
+
+	/* Check count is within bounds */
+	if (count > AMD_SDW_MAX_CONTROLLERS) {
+		dev_err(dev, "Controller count %d exceeds max %d\n",
+			count, AMD_SDW_MAX_CONTROLLERS);
+		return -EINVAL;
+	}
+
+	if (!count) {
+		dev_warn(dev, "No SoundWire controllers detected\n");
+		return -EINVAL;
+	}
+	dev_dbg(dev, "ACPI reports %d Soundwire Controller devices\n", count);
+	acp_data->sdw_master_count  = count;
+	for (index = 0; index < count; index++) {
+		snprintf(name, sizeof(name), "mipi-sdw-link-%d-subproperties", index);
+		link = fwnode_get_named_child_node(acp_data->sdw_fw_node, name);
+		if (!link) {
+			dev_err(dev, "Master node %s not found\n", name);
+			return -EIO;
+		}
+
+		fwnode_property_read_u32(link, "amd-sdw-power-mode",
+					 &acp_sdw_power_mode);
+		if (acp_sdw_power_mode != AMD_SDW_POWER_OFF_MODE)
+			acp_data->acp_sdw_power_off = false;
+	}
+	return 0;
+}
+
+static int get_acp63_device_config(u32 config, struct pci_dev *pci, struct acp63_dev_data *acp_data)
 {
 	struct acpi_device *dmic_dev;
+	struct acpi_device *sdw_dev;
+	struct device *dev;
 	const union acpi_object *obj;
 	bool is_dmic_dev = false;
+	bool is_sdw_dev = false;
+	int ret;
+
+	dev = &pci->dev;
 
 	dmic_dev = acpi_find_child_device(ACPI_COMPANION(&pci->dev), ACP63_DMIC_ADDR, 0);
 	if (dmic_dev) {
@@ -149,22 +206,84 @@ static void get_acp63_device_config(u32 config, struct pci_dev *pci,
 			is_dmic_dev = true;
 	}
 
+	sdw_dev = acpi_find_child_device(ACPI_COMPANION(&pci->dev), ACP63_SDW_ADDR, 0);
+	if (sdw_dev) {
+		is_sdw_dev = true;
+		acp_data->sdw_fw_node = acpi_fwnode_handle(sdw_dev);
+		ret = sdw_amd_scan_controller(dev);
+		if (ret)
+			return ret;
+	}
+
+	dev_dbg(&pci->dev, "Audio Mode %d\n", config);
 	switch (config) {
-	case ACP_CONFIG_0:
-	case ACP_CONFIG_1:
+	case ACP_CONFIG_4:
+	case ACP_CONFIG_5:
+	case ACP_CONFIG_10:
+	case ACP_CONFIG_11:
+		if (is_dmic_dev) {
+			acp_data->pdev_mask = ACP63_PDM_DEV_MASK;
+			acp_data->pdev_count = ACP63_PDM_MODE_DEVS;
+		}
+		break;
 	case ACP_CONFIG_2:
 	case ACP_CONFIG_3:
-	case ACP_CONFIG_9:
-	case ACP_CONFIG_15:
-		dev_dbg(&pci->dev, "Audio Mode %d\n", config);
+		if (is_sdw_dev) {
+			switch (acp_data->sdw_master_count) {
+			case 1:
+				acp_data->pdev_mask = ACP63_SDW_DEV_MASK;
+				acp_data->pdev_count = ACP63_SDW0_MODE_DEVS;
+				break;
+			case 2:
+				acp_data->pdev_mask = ACP63_SDW_DEV_MASK;
+				acp_data->pdev_count = ACP63_SDW0_SDW1_MODE_DEVS;
+				break;
+			default:
+				return -EINVAL;
+			}
+		}
 		break;
-	default:
-		if (is_dmic_dev) {
+	case ACP_CONFIG_6:
+	case ACP_CONFIG_7:
+	case ACP_CONFIG_12:
+	case ACP_CONFIG_8:
+	case ACP_CONFIG_13:
+	case ACP_CONFIG_14:
+		if (is_dmic_dev && is_sdw_dev) {
+			switch (acp_data->sdw_master_count) {
+			case 1:
+				acp_data->pdev_mask = ACP63_SDW_PDM_DEV_MASK;
+				acp_data->pdev_count = ACP63_SDW0_PDM_MODE_DEVS;
+				break;
+			case 2:
+				acp_data->pdev_mask = ACP63_SDW_PDM_DEV_MASK;
+				acp_data->pdev_count = ACP63_SDW0_SDW1_PDM_MODE_DEVS;
+				break;
+			default:
+				return -EINVAL;
+			}
+		} else if (is_dmic_dev) {
 			acp_data->pdev_mask = ACP63_PDM_DEV_MASK;
 			acp_data->pdev_count = ACP63_PDM_MODE_DEVS;
+		} else if (is_sdw_dev) {
+			switch (acp_data->sdw_master_count) {
+			case 1:
+				acp_data->pdev_mask = ACP63_SDW_DEV_MASK;
+				acp_data->pdev_count = ACP63_SDW0_MODE_DEVS;
+				break;
+			case 2:
+				acp_data->pdev_mask = ACP63_SDW_DEV_MASK;
+				acp_data->pdev_count = ACP63_SDW0_SDW1_MODE_DEVS;
+				break;
+			default:
+				return -EINVAL;
+			}
 		}
 		break;
+	default:
+		break;
 	}
+	return 0;
 }
 
 static void acp63_fill_platform_dev_info(struct platform_device_info *pdevinfo,
@@ -188,6 +307,7 @@ static void acp63_fill_platform_dev_info(struct platform_device_info *pdevinfo,
 
 static int create_acp63_platform_devs(struct pci_dev *pci, struct acp63_dev_data *adata, u32 addr)
 {
+	struct acp_sdw_pdata *sdw_pdata;
 	struct platform_device_info pdevinfo[ACP63_DEVS];
 	struct device *parent;
 	int index;
@@ -220,8 +340,110 @@ static int create_acp63_platform_devs(struct pci_dev *pci, struct acp63_dev_data
 		acp63_fill_platform_dev_info(&pdevinfo[2], parent, NULL, "acp_ps_mach",
 					     0, NULL, 0, NULL, 0);
 		break;
+	case ACP63_SDW_DEV_MASK:
+		if (adata->pdev_count == ACP63_SDW0_MODE_DEVS) {
+			sdw_pdata = devm_kzalloc(&pci->dev, sizeof(struct acp_sdw_pdata),
+						 GFP_KERNEL);
+			if (!sdw_pdata) {
+				ret = -ENOMEM;
+				goto de_init;
+			}
+
+			sdw_pdata->instance = 0;
+			sdw_pdata->sdw_lock = &adata->acp_lock;
+			adata->sdw0_dev_index = 0;
+			adata->sdw_dma_dev_index = 1;
+			acp63_fill_platform_dev_info(&pdevinfo[0], parent, adata->sdw_fw_node,
+						     "amd_sdw_controller", 0, adata->res, 1,
+						     sdw_pdata, sizeof(struct acp_sdw_pdata));
+			acp63_fill_platform_dev_info(&pdevinfo[1], parent, NULL, "amd_ps_sdw_dma",
+						     0, adata->res, 1, &adata->acp_lock,
+						     sizeof(adata->acp_lock));
+		} else if (adata->pdev_count == ACP63_SDW0_SDW1_MODE_DEVS) {
+			sdw_pdata = devm_kzalloc(&pci->dev, sizeof(struct acp_sdw_pdata) * 2,
+						 GFP_KERNEL);
+			if (!sdw_pdata) {
+				ret = -ENOMEM;
+				goto de_init;
+			}
+
+			sdw_pdata[0].instance = 0;
+			sdw_pdata[1].instance = 1;
+			sdw_pdata[0].sdw_lock = &adata->acp_lock;
+			sdw_pdata[1].sdw_lock = &adata->acp_lock;
+			sdw_pdata->sdw_lock = &adata->acp_lock;
+			adata->sdw0_dev_index = 0;
+			adata->sdw1_dev_index = 1;
+			adata->sdw_dma_dev_index = 2;
+			acp63_fill_platform_dev_info(&pdevinfo[0], parent, adata->sdw_fw_node,
+						     "amd_sdw_controller", 0, adata->res, 1,
+						     &sdw_pdata[0], sizeof(struct acp_sdw_pdata));
+			acp63_fill_platform_dev_info(&pdevinfo[1], parent, adata->sdw_fw_node,
+						     "amd_sdw_controller", 1, adata->res, 1,
+						     &sdw_pdata[1], sizeof(struct acp_sdw_pdata));
+			acp63_fill_platform_dev_info(&pdevinfo[2], parent, NULL, "amd_ps_sdw_dma",
+						     0, adata->res, 1, &adata->acp_lock,
+						     sizeof(adata->acp_lock));
+		}
+		break;
+	case ACP63_SDW_PDM_DEV_MASK:
+		if (adata->pdev_count == ACP63_SDW0_PDM_MODE_DEVS) {
+			sdw_pdata = devm_kzalloc(&pci->dev, sizeof(struct acp_sdw_pdata),
+						 GFP_KERNEL);
+			if (!sdw_pdata) {
+				ret = -ENOMEM;
+				goto de_init;
+			}
+
+			sdw_pdata->instance = 0;
+			sdw_pdata->sdw_lock = &adata->acp_lock;
+			adata->pdm_dev_index  = 0;
+			adata->sdw0_dev_index = 1;
+			adata->sdw_dma_dev_index = 2;
+			acp63_fill_platform_dev_info(&pdevinfo[0], parent, NULL, "acp_ps_pdm_dma",
+						     0, adata->res, 1, &adata->acp_lock,
+						     sizeof(adata->acp_lock));
+			acp63_fill_platform_dev_info(&pdevinfo[1], parent, adata->sdw_fw_node,
+						     "amd_sdw_controller", 0, adata->res, 1,
+						     sdw_pdata, sizeof(struct acp_sdw_pdata));
+			acp63_fill_platform_dev_info(&pdevinfo[2], parent, NULL, "amd_ps_sdw_dma",
+						     0, adata->res, 1, &adata->acp_lock,
+						     sizeof(adata->acp_lock));
+			acp63_fill_platform_dev_info(&pdevinfo[3], parent, NULL, "dmic-codec",
+						     0, NULL, 0, NULL, 0);
+		} else if (adata->pdev_count == ACP63_SDW0_SDW1_PDM_MODE_DEVS) {
+			sdw_pdata = devm_kzalloc(&pci->dev, sizeof(struct acp_sdw_pdata) * 2,
+						 GFP_KERNEL);
+			if (!sdw_pdata) {
+				ret = -ENOMEM;
+				goto de_init;
+			}
+			sdw_pdata[0].instance = 0;
+			sdw_pdata[1].instance = 1;
+			sdw_pdata[0].sdw_lock = &adata->acp_lock;
+			sdw_pdata[1].sdw_lock = &adata->acp_lock;
+			adata->pdm_dev_index = 0;
+			adata->sdw0_dev_index = 1;
+			adata->sdw1_dev_index = 2;
+			adata->sdw_dma_dev_index = 3;
+			acp63_fill_platform_dev_info(&pdevinfo[0], parent, NULL, "acp_ps_pdm_dma",
+						     0, adata->res, 1, &adata->acp_lock,
+						     sizeof(adata->acp_lock));
+			acp63_fill_platform_dev_info(&pdevinfo[1], parent, adata->sdw_fw_node,
+						     "amd_sdw_controller", 0, adata->res, 1,
+						     &sdw_pdata[0], sizeof(struct acp_sdw_pdata));
+			acp63_fill_platform_dev_info(&pdevinfo[2], parent, adata->sdw_fw_node,
+						     "amd_sdw_controller", 1, adata->res, 1,
+						     &sdw_pdata[1], sizeof(struct acp_sdw_pdata));
+			acp63_fill_platform_dev_info(&pdevinfo[3], parent, NULL, "amd_ps_sdw_dma",
+						     0, adata->res, 1, &adata->acp_lock,
+						     sizeof(adata->acp_lock));
+			acp63_fill_platform_dev_info(&pdevinfo[4], parent, NULL, "dmic-codec",
+						     0, NULL, 0, NULL, 0);
+		}
+		break;
 	default:
-		dev_dbg(&pci->dev, "No PDM devices found\n");
+		dev_dbg(&pci->dev, "No PDM or Soundwire controller devices found\n");
 		return 0;
 	}
 
@@ -299,7 +521,11 @@ static int snd_acp63_probe(struct pci_dev *pci,
 		goto de_init;
 	}
 	val = acp63_readl(adata->acp63_base + ACP_PIN_CONFIG);
-	get_acp63_device_config(val, pci, adata);
+	ret = get_acp63_device_config(val, pci, adata);
+	if (ret) {
+		dev_err(&pci->dev, "get acp device config failed:%d\n", ret);
+		goto de_init;
+	}
 	ret = create_acp63_platform_devs(pci, adata, addr);
 	if (ret < 0) {
 		dev_err(&pci->dev, "ACP platform devices creation failed\n");
-- 
2.34.1