ASoC: amd: acp7x: add ACP PCI driver probe/remove sequence

Add ACP7.x PCI driver probe and remove sequence for ACP7.D/7.E/7.F
variants.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Link: https://patch.msgid.link/20260507181251.20594-3-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/amd/acp7x/acp7x.h b/sound/soc/amd/acp7x/acp7x.h
new file mode 100644 (file)
index 0000000..b4586a2
--- /dev/null
+++ b/sound/soc/amd/acp7x/acp7x.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * AMD Common ACP header file for ACP7.X variants(ACP7.D/7.E/7.F)
+ *
+ * Copyright (C) 2026 Advanced Micro Devices, Inc. All rights reserved.
+ */
+
+#ifndef __SOUND_SOC_AMD_ACP7X_H
+#define __SOUND_SOC_AMD_ACP7X_H
+
+#include <linux/io.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+
+#include <sound/acp7x_chip_offset_byte.h>
+
+#define ACP_DEVICE_ID          0x15E2
+#define ACP7X_REG_START                0x1240000
+#define ACP7X_REG_END          0x125C000
+
+#define ACP7D_PCI_REV          0x7D
+#define ACP7E_PCI_REV          0x7E
+#define ACP7F_PCI_REV          0x7F
+
+int snd_amd_acp_find_config(struct pci_dev *pci);
+
+struct acp7x_dev_data {
+       void __iomem *acp7x_base;
+};
+
+#endif /* __SOUND_SOC_AMD_ACP7X_H */

diff --git a/sound/soc/amd/acp7x/pci-acp7x.c b/sound/soc/amd/acp7x/pci-acp7x.c
new file mode 100644 (file)
index 0000000..476b3ae
--- /dev/null
+++ b/sound/soc/amd/acp7x/pci-acp7x.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * AMD common ACP PCI driver for ACP7.x variants
+ * which includes ACP7.D/7.E/7.F and future variants
+ * with same register layout.
+ *
+ * Copyright 2026 Advanced Micro Devices, Inc.
+ */
+
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include "acp7x.h"
+
+static int snd_acp7x_probe(struct pci_dev *pci,
+                          const struct pci_device_id *pci_id)
+{
+       struct acp7x_dev_data *adata;
+       u32 addr;
+       u32 flag;
+       int ret;
+
+       flag = snd_amd_acp_find_config(pci);
+       if (flag)
+               return -ENODEV;
+
+       /* ACP PCI revision id check for ACP7.x platforms */
+       switch (pci->revision) {
+       case ACP7D_PCI_REV:
+       case ACP7E_PCI_REV:
+       case ACP7F_PCI_REV:
+               break;
+       default:
+               return -ENODEV;
+       }
+       if (pci_enable_device(pci)) {
+               dev_err(&pci->dev, "pci_enable_device failed\n");
+               return -ENODEV;
+       }
+
+       ret = pci_request_regions(pci, "AMD ACP7.x audio");
+       if (ret < 0) {
+               dev_err(&pci->dev, "pci_request_regions failed\n");
+               goto disable_pci;
+       }
+       adata = devm_kzalloc(&pci->dev, sizeof(struct acp7x_dev_data),
+                            GFP_KERNEL);
+       if (!adata) {
+               ret = -ENOMEM;
+               goto release_regions;
+       }
+       addr = pci_resource_start(pci, 0);
+       adata->acp7x_base = devm_ioremap(&pci->dev, addr,
+                                        pci_resource_len(pci, 0));
+       if (!adata->acp7x_base) {
+               ret = -ENOMEM;
+               goto release_regions;
+       }
+       pci_set_master(pci);
+       pci_set_drvdata(pci, adata);
+       return 0;
+
+release_regions:
+       pci_release_regions(pci);
+disable_pci:
+       pci_disable_device(pci);
+
+       return ret;
+}
+
+static void snd_acp7x_remove(struct pci_dev *pci)
+{
+       pci_release_regions(pci);
+       pci_disable_device(pci);
+}
+
+static const struct pci_device_id snd_acp7x_ids[] = {
+       { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),
+       .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
+       .class_mask = 0xffffff },
+       { 0, },
+};
+MODULE_DEVICE_TABLE(pci, snd_acp7x_ids);
+
+static struct pci_driver acp7x_pci_driver  = {
+       .name = KBUILD_MODNAME,
+       .id_table = snd_acp7x_ids,
+       .probe = snd_acp7x_probe,
+       .remove = snd_acp7x_remove,
+};
+
+module_pci_driver(acp7x_pci_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
+MODULE_DESCRIPTION("AMD ACP PCI driver for ACP7.X");
+MODULE_LICENSE("GPL");