mirror of https://gitee.com/openkylin/linux.git
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/*
|
|
* u_serial.h - interface to USB gadget "serial port"/TTY utilities
|
|
*
|
|
* Copyright (C) 2008 David Brownell
|
|
* Copyright (C) 2008 by Nokia Corporation
|
|
*
|
|
* This software is distributed under the terms of the GNU General
|
|
* Public License ("GPL") as published by the Free Software Foundation,
|
|
* either version 2 of that License or (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef __U_SERIAL_H
|
|
#define __U_SERIAL_H
|
|
|
|
#include <linux/usb/composite.h>
|
|
#include <linux/usb/cdc.h>
|
|
|
|
#define MAX_U_SERIAL_PORTS 4
|
|
|
|
struct f_serial_opts {
|
|
struct usb_function_instance func_inst;
|
|
u8 port_num;
|
|
};
|
|
|
|
/*
|
|
* One non-multiplexed "serial" I/O port ... there can be several of these
|
|
* on any given USB peripheral device, if it provides enough endpoints.
|
|
*
|
|
* The "u_serial" utility component exists to do one thing: manage TTY
|
|
* style I/O using the USB peripheral endpoints listed here, including
|
|
* hookups to sysfs and /dev for each logical "tty" device.
|
|
*
|
|
* REVISIT at least ACM could support tiocmget() if needed.
|
|
*
|
|
* REVISIT someday, allow multiplexing several TTYs over these endpoints.
|
|
*/
|
|
struct gserial {
|
|
struct usb_function func;
|
|
|
|
/* port is managed by gserial_{connect,disconnect} */
|
|
struct gs_port *ioport;
|
|
|
|
struct usb_ep *in;
|
|
struct usb_ep *out;
|
|
|
|
/* REVISIT avoid this CDC-ACM support harder ... */
|
|
struct usb_cdc_line_coding port_line_coding; /* 9600-8-N-1 etc */
|
|
|
|
/* notification callbacks */
|
|
void (*connect)(struct gserial *p);
|
|
void (*disconnect)(struct gserial *p);
|
|
int (*send_break)(struct gserial *p, int duration);
|
|
};
|
|
|
|
/* utilities to allocate/free request and buffer */
|
|
struct usb_request *gs_alloc_req(struct usb_ep *ep, unsigned len, gfp_t flags);
|
|
void gs_free_req(struct usb_ep *, struct usb_request *req);
|
|
|
|
/* management of individual TTY ports */
|
|
int gserial_alloc_line(unsigned char *port_line);
|
|
void gserial_free_line(unsigned char port_line);
|
|
|
|
/* connect/disconnect is handled by individual functions */
|
|
int gserial_connect(struct gserial *, u8 port_num);
|
|
void gserial_disconnect(struct gserial *);
|
|
|
|
/* functions are bound to configurations by a config or gadget driver */
|
|
int gser_bind_config(struct usb_configuration *c, u8 port_num);
|
|
int obex_bind_config(struct usb_configuration *c, u8 port_num);
|
|
|
|
#endif /* __U_SERIAL_H */
|