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-rw-r--r--sound/soc/amd/acp/acp-pci.c160
1 files changed, 160 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 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);