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__u8 *data, __u8 datasize);
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static int firm_open(struct usb_serial_port *port);
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static int firm_close(struct usb_serial_port *port);
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static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
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static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
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static int firm_set_break(struct usb_serial_port *port, __u8 onoff);