63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
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/*
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* u_serial.h - interface to USB gadget "serial port"/TTY utilities
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*
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* Copyright (C) 2008 David Brownell
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* Copyright (C) 2008 by Nokia Corporation
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*
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* This software is distributed under the terms of the GNU General
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* Public License ("GPL") as published by the Free Software Foundation,
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* either version 2 of that License or (at your option) any later version.
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*/
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#ifndef __U_SERIAL_H
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#define __U_SERIAL_H
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/* #include <linux/usb/composite.h> */
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include <linux/usb/cdc.h>
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/*
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* One non-multiplexed "serial" I/O port ... there can be several of these
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* on any given USB peripheral device, if it provides enough endpoints.
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*
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* The "u_serial" utility component exists to do one thing: manage TTY
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* style I/O using the USB peripheral endpoints listed here, including
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* hookups to sysfs and /dev for each logical "tty" device.
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*
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* REVISIT need TTY --> USB event flow too, so ACM can report open/close
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* as carrier detect events. Model after ECM. There's more ACM state too.
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*
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* REVISIT someday, allow multiplexing several TTYs over these endpoints.
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*/
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struct gserial {
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/* struct usb_function func; */
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/* port is managed by gserial_{connect,disconnect} */
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struct gs_port *ioport;
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struct usb_ep *in;
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struct usb_ep *out;
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struct usb_endpoint_descriptor *in_desc;
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struct usb_endpoint_descriptor *out_desc;
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/* REVISIT avoid this CDC-ACM support harder ... */
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struct usb_cdc_line_coding port_line_coding; /* 9600-8-N-1 etc */
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/* FIXME remove these when we switch to acm_bind_config... */
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struct usb_ep *notify;
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struct usb_endpoint_descriptor *notify_desc;
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u16 port_handshake_bits;
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};
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/* port setup/teardown is handled by gadget driver */
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int gserial_setup(struct usb_gadget *g, unsigned n_ports);
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void gserial_cleanup(void);
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/* connect/disconnect is handled by individual functions */
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int gserial_connect(struct gserial *, u8 port_num);
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void gserial_disconnect(struct gserial *);
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#endif /* __U_SERIAL_H */
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