1 files changed, 235 insertions, 0 deletions
diff --git a/sound/soc/amd/acp/acp-pci.c b/sound/soc/amd/acp/acp-pci.c
new file mode 100644
index 0000000000..a32c14a109
--- /dev/null
+++ b/sound/soc/amd/acp/acp-pci.c
@@ -0,0 +1,235 @@
+// 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/module.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 acp_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))
+		return dev_err_probe(&pci->dev, -ENODEV,
+				     "pci_enable_device failed\n");
+
+	ret = pci_request_regions(pci, "AMD ACP3x audio");
+	if (ret < 0) {
+		dev_err(&pci->dev, "pci_request_regions failed\n");
+		ret = -ENOMEM;
+		goto disable_pci;
+	}
+
+	pci_set_master(pci);
+
+	res_acp = acp_res;
+	num_res = ARRAY_SIZE(acp_res);
+
+	switch (pci->revision) {
+	case 0x01:
+		chip->name = "acp_asoc_renoir";
+		chip->acp_rev = ACP3X_DEV;
+		break;
+	case 0x6f:
+		chip->name = "acp_asoc_rembrandt";
+		chip->acp_rev = ACP6X_DEV;
+		break;
+	default:
+		dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
+		ret = -EINVAL;
+		goto release_regions;
+	}
+
+	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");
+		ret = PTR_ERR(dmic_dev);
+		goto release_regions;
+	}
+
+	addr = pci_resource_start(pci, 0);
+	chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));
+	if (!chip->base) {
+		ret = -ENOMEM;
+		goto unregister_dmic_dev;
+	}
+
+	acp_init(chip);
+	res = devm_kcalloc(&pci->dev, num_res, sizeof(struct resource), GFP_KERNEL);
+	if (!res) {
+		ret = -ENOMEM;
+		goto unregister_dmic_dev;
+	}
+
+	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);
+		ret = PTR_ERR(pdev);
+		goto unregister_dmic_dev;
+	}
+	chip->chip_pdev = pdev;
+	dev_set_drvdata(&pci->dev, chip);
+	pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
+	pm_runtime_use_autosuspend(&pci->dev);
+	pm_runtime_put_noidle(&pci->dev);
+	pm_runtime_allow(&pci->dev);
+	return ret;
+
+unregister_dmic_dev:
+	platform_device_unregister(dmic_dev);
+release_regions:
+	pci_release_regions(pci);
+disable_pci:
+	pci_disable_device(pci);
+
+	return ret;
+};
+
+static int __maybe_unused snd_acp_suspend(struct device *dev)
+{
+	struct acp_chip_info *chip;
+	int ret;
+
+	chip = dev_get_drvdata(dev);
+	ret = acp_deinit(chip->base);
+	if (ret)
+		dev_err(dev, "ACP de-init failed\n");
+	return ret;
+}
+
+static int __maybe_unused snd_acp_resume(struct device *dev)
+{
+	struct acp_chip_info *chip;
+	struct acp_dev_data *adata;
+	struct device child;
+	int ret;
+
+	chip = dev_get_drvdata(dev);
+	ret = acp_init(chip);
+	if (ret)
+		dev_err(dev, "ACP init failed\n");
+	child = chip->chip_pdev->dev;
+	adata = dev_get_drvdata(&child);
+	if (adata)
+		acp_enable_interrupts(adata);
+	return ret;
+}
+
+static const struct dev_pm_ops acp_pm_ops = {
+	SET_RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume)
+};
+
+static void acp_pci_remove(struct pci_dev *pci)
+{
+	struct acp_chip_info *chip;
+	int ret;
+
+	chip = pci_get_drvdata(pci);
+	pm_runtime_forbid(&pci->dev);
+	pm_runtime_get_noresume(&pci->dev);
+	if (dmic_dev)
+		platform_device_unregister(dmic_dev);
+	if (pdev)
+		platform_device_unregister(pdev);
+	ret = acp_deinit(chip->base);
+	if (ret)
+		dev_err(&pci->dev, "ACP de-init failed\n");
+}
+
+/* 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,
+	.driver = {
+		.pm = &acp_pm_ops,
+	},
+};
+module_pci_driver(snd_amd_acp_pci_driver);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_IMPORT_NS(SND_SOC_ACP_COMMON);
+MODULE_ALIAS(DRV_NAME);