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diff --git a/drivers/usb/serial/cypress_m8.h b/drivers/usb/serial/cypress_m8.h
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+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef CYPRESS_M8_H
+#define CYPRESS_M8_H
+
+/*
+ * definitions and function prototypes used for the cypress USB to Serial
+ * controller
+ */
+
+/*
+ * For sending our feature buffer - controlling serial communication states.
+ * Linux HID has no support for serial devices so we do this through the driver
+ */
+#define HID_REQ_GET_REPORT 0x01
+#define HID_REQ_SET_REPORT 0x09
+
+/* List other cypress USB to Serial devices here, and add them to the id_table */
+
+/* DeLorme Earthmate USB - a GPS device */
+#define VENDOR_ID_DELORME 0x1163
+#define PRODUCT_ID_EARTHMATEUSB 0x0100
+#define PRODUCT_ID_EARTHMATEUSB_LT20 0x0200
+
+/* Cypress HID->COM RS232 Adapter */
+#define VENDOR_ID_CYPRESS 0x04b4
+#define PRODUCT_ID_CYPHIDCOM 0x5500
+
+/* Simply Automated HID->COM UPB PIM (using Cypress PID 0x5500) */
+#define VENDOR_ID_SAI 0x17dd
+
+/* FRWD Dongle - a GPS sports watch */
+#define VENDOR_ID_FRWD 0x6737
+#define PRODUCT_ID_CYPHIDCOM_FRWD 0x0001
+
+/* Powercom UPS, chip CY7C63723 */
+#define VENDOR_ID_POWERCOM 0x0d9f
+#define PRODUCT_ID_UPS 0x0002
+
+/* Nokia CA-42 USB to serial cable */
+#define VENDOR_ID_DAZZLE 0x07d0
+#define PRODUCT_ID_CA42 0x4101
+/* End of device listing */
+
+/* Used for setting / requesting serial line settings */
+#define CYPRESS_SET_CONFIG 0x01
+#define CYPRESS_GET_CONFIG 0x02
+
+/* Used for throttle control */
+#define THROTTLED 0x1
+#define ACTUALLY_THROTTLED 0x2
+
+/*
+ * chiptypes - used in case firmware differs from the generic form ... offering
+ * different baud speeds/etc.
+ */
+#define CT_EARTHMATE 0x01
+#define CT_CYPHIDCOM 0x02
+#define CT_CA42V2 0x03
+#define CT_GENERIC 0x0F
+/* End of chiptype definitions */
+
+/*
+ * RS-232 serial data communication protocol definitions.
+ *
+ * These are sent / read at byte 0 of the input/output hid reports.
+ * You can find these values defined in the CY4601 USB to Serial design notes.
+ */
+
+#define CONTROL_DTR 0x20 /* data terminal ready */
+#define CONTROL_RTS 0x10 /* request to send */
+#define CONTROL_RESET 0x08 /* sent with output report */
+
+#define UART_MSR_MASK 0xf0
+#define UART_RI 0x80 /* ring indicator */
+#define UART_CD 0x40 /* carrier detect */
+#define UART_DSR 0x20 /* data set ready */
+#define UART_CTS 0x10 /* clear to send */
+#define CYP_ERROR 0x08 /* received from input report */
+
+/* End of RS-232 protocol definitions */
+
+#endif /* CYPRESS_M8_H */