ASoC: amd: add platform devices for acp6x pdm driver and dmic driver

ACP6.x IP has PDM decoder block.
Create a platform device for it, so that the PDM platform driver
can be bound to this device.
Pass PCI resources like MMIO to this platform device.

Create a platform device for generic dmic codec driver.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20211018112044.1705805-5-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/amd/yc/acp6x.h

@@ -9,6 +9,10 @@
 
 #define ACP_DEVICE_ID 0x15E2
 #define ACP6x_PHY_BASE_ADDRESS 0x1240000
+#define ACP6x_REG_START		0x1240000
+#define ACP6x_REG_END		0x1250200
+#define ACP6x_DEVS		2
+#define ACP6x_PDM_MODE		1
 
 #define ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK	0x00010001
 #define ACP_PGFSM_CNTL_POWER_ON_MASK	1
@@ -22,6 +26,25 @@
 #define ACP_ERROR_MASK 0x20000000
 #define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
 
+enum acp_config {
+	ACP_CONFIG_0 = 0,
+	ACP_CONFIG_1,
+	ACP_CONFIG_2,
+	ACP_CONFIG_3,
+	ACP_CONFIG_4,
+	ACP_CONFIG_5,
+	ACP_CONFIG_6,
+	ACP_CONFIG_7,
+	ACP_CONFIG_8,
+	ACP_CONFIG_9,
+	ACP_CONFIG_10,
+	ACP_CONFIG_11,
+	ACP_CONFIG_12,
+	ACP_CONFIG_13,
+	ACP_CONFIG_14,
+	ACP_CONFIG_15,
+};
+
 static inline u32 acp6x_readl(void __iomem *base_addr)
 {
 	return readl(base_addr - ACP6x_PHY_BASE_ADDRESS);

sound/soc/amd/yc/pci-acp6x.c

@@ -9,11 +9,15 @@
 #include <linux/module.h>
 #include <linux/io.h>
 #include <linux/delay.h>
+#include <linux/platform_device.h>
 
 #include "acp6x.h"
 
 struct acp6x_dev_data {
 	void __iomem *acp6x_base;
+	struct resource *res;
+	bool acp6x_audio_mode;
+	struct platform_device *pdev[ACP6x_DEVS];
 };
 
 static int acp6x_power_on(void __iomem *acp_base)
@@ -117,7 +121,9 @@ static int snd_acp6x_probe(struct pci_dev *pci,
 			   const struct pci_device_id *pci_id)
 {
 	struct acp6x_dev_data *adata;
-	int ret;
+	struct platform_device_info pdevinfo[ACP6x_DEVS];
+	int ret, index;
+	int val = 0x00;
 	u32 addr;
 
 	/* Yellow Carp device check */
@@ -154,8 +160,62 @@ static int snd_acp6x_probe(struct pci_dev *pci,
 	ret = acp6x_init(adata->acp6x_base);
 	if (ret)
 		goto release_regions;
+	val = acp6x_readl(adata->acp6x_base + ACP_PIN_CONFIG);
+	switch (val) {
+	case ACP_CONFIG_0:
+	case ACP_CONFIG_1:
+	case ACP_CONFIG_2:
+	case ACP_CONFIG_3:
+	case ACP_CONFIG_9:
+	case ACP_CONFIG_15:
+		dev_info(&pci->dev, "Audio Mode %d\n", val);
+		break;
+	default:
+		adata->res = devm_kzalloc(&pci->dev,
+					  sizeof(struct resource),
+					  GFP_KERNEL);
+		if (!adata->res) {
+			ret = -ENOMEM;
+			goto de_init;
+		}
+
+		adata->res->name = "acp_iomem";
+		adata->res->flags = IORESOURCE_MEM;
+		adata->res->start = addr;
+		adata->res->end = addr + (ACP6x_REG_END - ACP6x_REG_START);
+
+		adata->acp6x_audio_mode = ACP6x_PDM_MODE;
+
+		memset(&pdevinfo, 0, sizeof(pdevinfo));
+		pdevinfo[0].name = "acp_yc_pdm_dma";
+		pdevinfo[0].id = 0;
+		pdevinfo[0].parent = &pci->dev;
+		pdevinfo[0].num_res = 1;
+		pdevinfo[0].res = adata->res;
+
+		pdevinfo[1].name = "dmic-codec";
+		pdevinfo[1].id = 0;
+		pdevinfo[1].parent = &pci->dev;
 
+		for (index = 0; index < ACP6x_DEVS; index++) {
+			adata->pdev[index] =
+				platform_device_register_full(&pdevinfo[index]);
+			if (IS_ERR(adata->pdev[index])) {
+				dev_err(&pci->dev, "cannot register %s device\n",
+					pdevinfo[index].name);
+				ret = PTR_ERR(adata->pdev[index]);
+				goto unregister_devs;
+			}
+		}
+		break;
+	}
 	return 0;
+unregister_devs:
+	for (--index; index >= 0; index--)
+		platform_device_unregister(adata->pdev[index]);
+de_init:
+	if (acp6x_deinit(adata->acp6x_base))
+		dev_err(&pci->dev, "ACP de-init failed\n");
 release_regions:
 	pci_release_regions(pci);
 disable_pci:
@@ -167,9 +227,13 @@ static int snd_acp6x_probe(struct pci_dev *pci,
 static void snd_acp6x_remove(struct pci_dev *pci)
 {
 	struct acp6x_dev_data *adata;
-	int ret;
+	int ret, index;
 
 	adata = pci_get_drvdata(pci);
+	if (adata->acp6x_audio_mode == ACP6x_PDM_MODE) {
+		for (index = 0; index < ACP6x_DEVS; index++)
+			platform_device_unregister(adata->pdev[index]);
+	}
 	ret = acp6x_deinit(adata->acp6x_base);
 	if (ret)
 		dev_err(&pci->dev, "ACP de-init failed\n");