diff --git a/autobuild_mac80211_release/mt7986_bersa_mac80211/package/kernel/mt76/src/bersa/pci.c b/autobuild_mac80211_release/mt7986_bersa_mac80211/package/kernel/mt76/src/bersa/pci.c
new file mode 100644
index 0000000..a5e5e56
--- /dev/null
+++ b/autobuild_mac80211_release/mt7986_bersa_mac80211/package/kernel/mt76/src/bersa/pci.c
@@ -0,0 +1,216 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2020 MediaTek Inc.
+ *
+ * Author: Ryder Lee <ryder.lee@mediatek.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#include "bersa.h"
+#include "mac.h"
+#include "../trace.h"
+
+static LIST_HEAD(hif_list);
+static DEFINE_SPINLOCK(hif_lock);
+static u32 hif_idx;
+
+static const struct pci_device_id bersa_pci_device_table[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7902) }, //bellwether
+	{ },
+};
+
+static const struct pci_device_id bersa_hif_device_table[] = {
+	{ },
+};
+
+static struct bersa_hif *bersa_pci_get_hif2(u32 idx)
+{
+	struct bersa_hif *hif;
+	u32 val;
+
+	spin_lock_bh(&hif_lock);
+
+	list_for_each_entry(hif, &hif_list, list) {
+		val = readl(hif->regs + MT_PCIE_RECOG_ID);
+		val &= MT_PCIE_RECOG_ID_MASK;
+		if (val != idx)
+			continue;
+
+		get_device(hif->dev);
+		goto out;
+	}
+	hif = NULL;
+
+out:
+	spin_unlock_bh(&hif_lock);
+
+	return hif;
+}
+
+static void bersa_put_hif2(struct bersa_hif *hif)
+{
+	if (!hif)
+		return;
+
+	put_device(hif->dev);
+}
+
+static struct bersa_hif *bersa_pci_init_hif2(struct pci_dev *pdev)
+{
+	hif_idx++;
+	if (!pci_get_device(PCI_VENDOR_ID_MEDIATEK, 0x7916, NULL) &&
+	    !pci_get_device(PCI_VENDOR_ID_MEDIATEK, 0x790a, NULL))
+		return NULL;
+
+	writel(hif_idx | MT_PCIE_RECOG_ID_SEM,
+	       pcim_iomap_table(pdev)[0] + MT_PCIE_RECOG_ID);
+
+	return bersa_pci_get_hif2(hif_idx);
+}
+
+static int bersa_pci_hif2_probe(struct pci_dev *pdev)
+{
+	struct bersa_hif *hif;
+
+	hif = devm_kzalloc(&pdev->dev, sizeof(*hif), GFP_KERNEL);
+	if (!hif)
+		return -ENOMEM;
+
+	hif->dev = &pdev->dev;
+	hif->regs = pcim_iomap_table(pdev)[0];
+	hif->irq = pdev->irq;
+	spin_lock_bh(&hif_lock);
+	list_add(&hif->list, &hif_list);
+	spin_unlock_bh(&hif_lock);
+	pci_set_drvdata(pdev, hif);
+
+	return 0;
+}
+
+static int bersa_pci_probe(struct pci_dev *pdev,
+			    const struct pci_device_id *id)
+{
+	struct bersa_dev *dev;
+	struct mt76_dev *mdev;
+	struct bersa_hif *hif2;
+	int irq;
+	int ret;
+
+	ret = pcim_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
+	if (ret)
+		return ret;
+
+	pci_set_master(pdev);
+
+	ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+
+	mt76_pci_disable_aspm(pdev);
+
+	if (id->device == 0x790a)
+		return bersa_pci_hif2_probe(pdev);
+
+	dev = bersa_mmio_probe(&pdev->dev, pcim_iomap_table(pdev)[0],
+				id->device);
+	if (IS_ERR(dev))
+		return PTR_ERR(dev);
+
+	mdev = &dev->mt76;
+	hif2 = bersa_pci_init_hif2(pdev);
+
+	ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
+	if (ret < 0)
+		goto free_device;
+
+	irq = pdev->irq;
+	ret = devm_request_irq(mdev->dev, irq, bersa_irq_handler,
+			       IRQF_SHARED, KBUILD_MODNAME, dev);
+	if (ret)
+		goto free_irq_vector;
+
+	mt76_wr(dev, MT_INT_MASK_CSR, 0);
+
+	/* master switch of PCIe tnterrupt enable */
+	mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
+
+	if (hif2) {
+		dev->hif2 = hif2;
+
+		mt76_wr(dev, MT_INT1_MASK_CSR, 0);
+		/* master switch of PCIe tnterrupt enable */
+		mt76_wr(dev, MT_PCIE1_MAC_INT_ENABLE, 0xff);
+
+		ret = devm_request_irq(mdev->dev, dev->hif2->irq,
+				       bersa_irq_handler, IRQF_SHARED,
+				       KBUILD_MODNAME "-hif", dev);
+		if (ret)
+			goto free_hif2;
+	}
+
+	ret = bersa_register_device(dev);
+	if (ret)
+		goto free_hif2_irq;
+
+	return 0;
+
+free_hif2_irq:
+	if (dev->hif2)
+		devm_free_irq(mdev->dev, dev->hif2->irq, dev);
+free_hif2:
+	if (dev->hif2)
+		put_device(dev->hif2->dev);
+	devm_free_irq(mdev->dev, irq, dev);
+free_irq_vector:
+	pci_free_irq_vectors(pdev);
+free_device:
+	mt76_free_device(&dev->mt76);
+
+	return ret;
+}
+
+static void bersa_hif_remove(struct pci_dev *pdev)
+{
+	struct bersa_hif *hif = pci_get_drvdata(pdev);
+
+	list_del(&hif->list);
+}
+
+static void bersa_pci_remove(struct pci_dev *pdev)
+{
+	struct mt76_dev *mdev;
+	struct bersa_dev *dev;
+
+	mdev = pci_get_drvdata(pdev);
+	dev = container_of(mdev, struct bersa_dev, mt76);
+	bersa_put_hif2(dev->hif2);
+	bersa_unregister_device(dev);
+}
+
+struct pci_driver bersa_hif_driver = {
+	.name		= KBUILD_MODNAME "_hif",
+	.id_table	= bersa_hif_device_table,
+	.probe		= bersa_pci_probe,
+	.remove		= bersa_hif_remove,
+};
+
+struct pci_driver bersa_pci_driver = {
+	.name		= KBUILD_MODNAME,
+	.id_table	= bersa_pci_device_table,
+	.probe		= bersa_pci_probe,
+	.remove		= bersa_pci_remove,
+};
+
+MODULE_DEVICE_TABLE(pci, bersa_pci_device_table);
+MODULE_DEVICE_TABLE(pci, bersa_hif_device_table);
+MODULE_FIRMWARE(MT7902_FIRMWARE_WA);
+MODULE_FIRMWARE(MT7902_FIRMWARE_WM);
+MODULE_FIRMWARE(MT7902_ROM_PATCH);
+MODULE_FIRMWARE(MT7902_FIRMWARE_ROM);
+MODULE_FIRMWARE(MT7902_FIRMWARE_ROM_SRAM);
\ No newline at end of file