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#ifndef __U_SERIAL_H
#define __U_SERIAL_H
#include <linux/usb/composite.h>
#include <linux/usb/cdc.h>
/*
* 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 module 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 need TTY --> USB event flow too, so ACM can report open/close
* as carrier detect events. There's other ACM state too...
*
* 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;
struct usb_endpoint_descriptor *in_desc;
struct usb_endpoint_descriptor *out_desc;
/* REVISIT avoid this CDC-ACM support harder ... */
struct usb_cdc_line_coding port_line_coding; /* 9600-8-N-1 etc */
};
/* port setup/teardown is handled by gadget driver */
int gserial_setup(struct usb_gadget *g, unsigned n_ports);
void gserial_cleanup(void);
/* 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 acm_bind_config(struct usb_configuration *c, u8 port_num);
int gser_bind_config(struct usb_configuration *c, u8 port_num);
#endif /* __U_SERIAL_H */
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