diff --git a/drivers/net/usb/aqc111.c b/drivers/net/usb/aqc111.c
index c914e19387f2..7f3e5a615750 100644
--- a/drivers/net/usb/aqc111.c
+++ b/drivers/net/usb/aqc111.c
@@ -14,6 +14,130 @@
 #include <linux/usb/cdc.h>
 #include <linux/usb/usbnet.h>
 
+#include "aqc111.h"
+
+static int __aqc111_read_cmd(struct usbnet *dev, u8 cmd, u16 value,
+			     u16 index, u16 size, void *data, int nopm)
+{
+	int ret;
+	int (*fn)(struct usbnet *dev, u8 cmd, u8 reqtype, u16 value,
+		  u16 index, void *data, u16 size);
+
+	if (nopm)
+		fn = usbnet_read_cmd_nopm;
+	else
+		fn = usbnet_read_cmd;
+
+	ret = fn(dev, cmd, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		 value, index, data, size);
+	if (size == 2)
+		le16_to_cpus(data);
+
+	if (unlikely(ret < 0))
+		netdev_warn(dev->net,
+			    "Failed to read(0x%x) reg index 0x%04x: %d\n",
+			    cmd, index, ret);
+	return ret;
+}
+
+static int aqc111_read_cmd_nopm(struct usbnet *dev, u8 cmd, u16 value,
+				u16 index, u16 size, void *data)
+{
+	return __aqc111_read_cmd(dev, cmd, value, index, size, data, 1);
+}
+
+static int aqc111_read_cmd(struct usbnet *dev, u8 cmd, u16 value,
+			   u16 index, u16 size, void *data)
+{
+	return __aqc111_read_cmd(dev, cmd, value, index, size, data, 0);
+}
+
+static int __aq_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
+			  u16 value, u16 index, const void *data, u16 size)
+{
+	void *buf = NULL;
+	int err = -ENOMEM;
+
+	netdev_dbg(dev->net,
+		   "%s cmd=%#x reqtype=%#x value=%#x index=%#x size=%d\n",
+		   __func__, cmd, reqtype, value, index, size);
+
+	if (data) {
+		buf = kmemdup(data, size, GFP_KERNEL);
+		if (!buf)
+			goto out;
+	}
+
+	if (size == 2)
+		cpu_to_le16s(buf);
+	else if (size == 4)
+		cpu_to_le32s(buf);
+
+	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
+			      cmd, reqtype, value, index, buf, size,
+			      (cmd == AQ_PHY_POWER) ? AQ_USB_PHY_SET_TIMEOUT :
+			      AQ_USB_SET_TIMEOUT);
+
+	kfree(buf);
+
+out:
+	return err;
+}
+
+static int aq_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype,
+			     u16 value, u16 index, const void *data, u16 size)
+{
+	return __aq_write_cmd(dev, cmd, reqtype, value, index,
+			      data, size);
+}
+
+static int aq_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
+			u16 value, u16 index, const void *data, u16 size)
+{
+	int ret;
+
+	if (usb_autopm_get_interface(dev->intf) < 0)
+		return -ENODEV;
+	ret = __aq_write_cmd(dev, cmd, reqtype, value, index, data, size);
+	usb_autopm_put_interface(dev->intf);
+	return ret;
+}
+
+static int __aqc111_write_cmd(struct usbnet *dev, u8 cmd, u16 value,
+			      u16 index, u16 size, void *data, int nopm)
+{
+	int ret;
+	int (*fn)(struct usbnet *dev, u8 cmd, u8 reqtype, u16 value,
+		  u16 index, const void *data, u16 size);
+
+	if (nopm)
+		fn = aq_write_cmd_nopm;
+	else
+		fn = aq_write_cmd;
+
+	ret = fn(dev, cmd, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		 value, index, data, size);
+
+	if (unlikely(ret < 0))
+		netdev_warn(dev->net,
+			    "Failed to write(0x%x) reg 0x%04x: %d\n",
+			    cmd, value, ret);
+
+	return ret;
+}
+
+static int aqc111_write_cmd_nopm(struct usbnet *dev, u8 cmd, u16 value,
+				 u16 index, u16 size, void *data)
+{
+	return __aqc111_write_cmd(dev, cmd, value, index, size, data, 1);
+}
+
+static int aqc111_write_cmd(struct usbnet *dev, u8 cmd, u16 value,
+			    u16 index, u16 size, void *data)
+{
+	return __aqc111_write_cmd(dev, cmd, value, index, size, data, 0);
+}
+
 static const struct net_device_ops aqc111_netdev_ops = {
 	.ndo_open		= usbnet_open,
 	.ndo_stop		= usbnet_stop,
diff --git a/drivers/net/usb/aqc111.h b/drivers/net/usb/aqc111.h
new file mode 100644
index 000000000000..1698a6a104fe
--- /dev/null
+++ b/drivers/net/usb/aqc111.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Aquantia Corp. Aquantia AQtion USB to 5GbE Controller
+ * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
+ * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
+ * Copyright (C) 2002-2003 TiVo Inc.
+ * Copyright (C) 2017-2018 ASIX
+ * Copyright (C) 2018 Aquantia Corp.
+ */
+
+#ifndef __LINUX_USBNET_AQC111_H
+#define __LINUX_USBNET_AQC111_H
+
+#define AQ_PHY_POWER			0x31
+
+#define AQ_USB_PHY_SET_TIMEOUT		10000
+#define AQ_USB_SET_TIMEOUT		4000
+
+#endif /* __LINUX_USBNET_AQC111_H */
+
