4 files changed, 182 insertions, 0 deletions

diff --git a/sound/soc/amd/acp/Kconfig b/sound/soc/amd/acp/Kconfig
index f4ca7843391b..626e4a5cb06a 100644
--- a/sound/soc/amd/acp/Kconfig
+++ b/sound/soc/amd/acp/Kconfig
@@ -25,6 +25,12 @@ config SND_SOC_AMD_ACP_PCM
 	tristate
 	select SND_SOC_ACPI if ACPI
 
+config SND_SOC_AMD_ACP_PCI
+	tristate "AMD ACP PCI Driver Support"
+	depends on X86 && PCI
+	help
+	  This options enables generic PCI driver for ACP device.
+
 config SND_AMD_ASOC_RENOIR
 	tristate "AMD ACP ASOC Renoir Support"
 	select SND_SOC_AMD_ACP_PCM
diff --git a/sound/soc/amd/acp/Makefile b/sound/soc/amd/acp/Makefile
index 66cac95432f6..657ddfadf0bb 100644
--- a/sound/soc/amd/acp/Makefile
+++ b/sound/soc/amd/acp/Makefile
@@ -8,6 +8,7 @@
 snd-acp-pcm-objs     := acp-platform.o
 snd-acp-i2s-objs     := acp-i2s.o
 snd-acp-pdm-objs     := acp-pdm.o
+snd-acp-pci-objs     := acp-pci.o
 
 #platform specific driver
 snd-acp-renoir-objs     := acp-renoir.o
@@ -20,6 +21,7 @@ snd-acp-sof-mach-objs     := acp-sof-mach.o
 obj-$(CONFIG_SND_SOC_AMD_ACP_PCM) += snd-acp-pcm.o
 obj-$(CONFIG_SND_SOC_AMD_ACP_I2S) += snd-acp-i2s.o
 obj-$(CONFIG_SND_SOC_AMD_ACP_PDM) += snd-acp-pdm.o
+obj-$(CONFIG_SND_SOC_AMD_ACP_PCI) += snd-acp-pci.o
 
 obj-$(CONFIG_SND_AMD_ASOC_RENOIR) += snd-acp-renoir.o
 
diff --git a/sound/soc/amd/acp/acp-pci.c b/sound/soc/amd/acp/acp-pci.c
new file mode 100644
index 000000000000..340e39d7f420
--- /dev/null
+++ b/sound/soc/amd/acp/acp-pci.c
@@ -0,0 +1,160 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license. When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2022 Advanced Micro Devices, Inc. All rights reserved.
+//
+// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
+
+/*
+ * Generic PCI interface for ACP device
+ */
+
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include "amd.h"
+#include "../mach-config.h"
+
+#define DRV_NAME "acp_pci"
+
+#define ACP3x_REG_START	0x1240000
+#define ACP3x_REG_END	0x125C000
+
+static struct platform_device *dmic_dev;
+static struct platform_device *pdev;
+
+static const struct resource acp3x_res[] = {
+	{
+		.start = 0,
+		.end = ACP3x_REG_END - ACP3x_REG_START,
+		.name = "acp_mem",
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		.start = 0,
+		.end = 0,
+		.name = "acp_dai_irq",
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
+{
+	struct platform_device_info pdevinfo;
+	struct device *dev = &pci->dev;
+	const struct resource *res_acp;
+	struct acp_chip_info *chip;
+	struct resource *res;
+	unsigned int flag, addr, num_res, i;
+	int ret;
+
+	flag = snd_amd_acp_find_config(pci);
+	if (flag != FLAG_AMD_LEGACY)
+		return -ENODEV;
+
+	chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	if (pci_enable_device(pci)) {
+		dev_err(&pci->dev, "pci_enable_device failed\n");
+		return -ENODEV;
+	}
+
+	ret = pci_request_regions(pci, "AMD ACP3x audio");
+	if (ret < 0) {
+		dev_err(&pci->dev, "pci_request_regions failed\n");
+		return -ENOMEM;
+	}
+
+	pci_set_master(pci);
+
+	switch (pci->revision) {
+	case 0x01:
+		res_acp = acp3x_res;
+		num_res = ARRAY_SIZE(acp3x_res);
+		chip->name = "acp_asoc_renoir";
+		chip->acp_rev = ACP3X_DEV;
+		break;
+	default:
+		dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
+		return -EINVAL;
+	}
+
+	dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0);
+	if (IS_ERR(dmic_dev)) {
+		dev_err(dev, "failed to create DMIC device\n");
+		return PTR_ERR(dmic_dev);
+	}
+
+	addr = pci_resource_start(pci, 0);
+	chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));
+
+	res = devm_kzalloc(&pci->dev, sizeof(struct resource) * num_res, GFP_KERNEL);
+	if (!res) {
+		platform_device_unregister(dmic_dev);
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < num_res; i++, res_acp++) {
+		res[i].name = res_acp->name;
+		res[i].flags = res_acp->flags;
+		res[i].start = addr + res_acp->start;
+		res[i].end = addr + res_acp->end;
+		if (res_acp->flags == IORESOURCE_IRQ) {
+			res[i].start = pci->irq;
+			res[i].end = res[i].start;
+		}
+	}
+
+	memset(&pdevinfo, 0, sizeof(pdevinfo));
+
+	pdevinfo.name = chip->name;
+	pdevinfo.id = 0;
+	pdevinfo.parent = &pci->dev;
+	pdevinfo.num_res = num_res;
+	pdevinfo.res = &res[0];
+	pdevinfo.data = chip;
+	pdevinfo.size_data = sizeof(*chip);
+
+	pdev = platform_device_register_full(&pdevinfo);
+	if (IS_ERR(pdev)) {
+		dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name);
+		platform_device_unregister(dmic_dev);
+		ret = PTR_ERR(pdev);
+	}
+
+	return ret;
+};
+
+static void acp_pci_remove(struct pci_dev *pci)
+{
+	if (dmic_dev)
+		platform_device_unregister(dmic_dev);
+	if (pdev)
+		platform_device_unregister(pdev);
+}
+
+/* PCI IDs */
+static const struct pci_device_id acp_pci_ids[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)},
+	{ 0, }
+};
+MODULE_DEVICE_TABLE(pci, acp_pci_ids);
+
+/* pci_driver definition */
+static struct pci_driver snd_amd_acp_pci_driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = acp_pci_ids,
+	.probe = acp_pci_probe,
+	.remove = acp_pci_remove,
+};
+module_pci_driver(snd_amd_acp_pci_driver);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS(DRV_NAME);
diff --git a/sound/soc/amd/acp/amd.h b/sound/soc/amd/acp/amd.h
index 567355209a5c..8fd38bf4d3bd 100644
--- a/sound/soc/amd/acp/amd.h
+++ b/sound/soc/amd/acp/amd.h
@@ -12,9 +12,14 @@
 #define __AMD_ACP_H
 
 #include <sound/pcm.h>
+#include <sound/soc.h>
 #include <sound/soc-acpi.h>
+#include <sound/soc-dai.h>
+
 #include "chip_offset_byte.h"
 
+#define ACP3X_DEV			3
+
 #define I2S_SP_INSTANCE			0x00
 #define I2S_BT_INSTANCE			0x01
 #define DMIC_INSTANCE			0x02
@@ -70,6 +75,12 @@
 
 #define ACP_MAX_STREAM			6
 
+struct acp_chip_info {
+	char *name;		/* Platform name */
+	unsigned int acp_rev;	/* ACP Revision id */
+	void __iomem *base;	/* ACP memory PCI base */
+};
+
 struct acp_stream {
 	struct snd_pcm_substream *substream;
 	int irq_bit;
@@ -106,6 +117,9 @@ int acp_platform_unregister(struct device *dev);
 
 int acp_machine_select(struct acp_dev_data *adata);
 
+/* Machine configuration */
+int snd_amd_acp_find_config(struct pci_dev *pci);
+
 static inline u64 acp_get_byte_count(struct acp_dev_data *adata, int dai_id, int direction)
 {
 	u64 byte_count, low = 0, high = 0;