1f1ba11b64
Update the CDC-ACM gadget code to support the peripheral-to-host notifications when the tty is opened or closed, or issues a BREAK. The serial framework code calls new generic hooks; right now only CDC-ACM uses those hooks. This resolves several REVISIT comments in the code. (Based on a patch from Felipe Balbi.) Note that this doesn't expose USB_CDC_CAP_BRK to the host, since this code still rejects USB_CDC_REQ_SEND_BREAK control requests for host-to-peripheral BREAK signaling (received via /dev/ttyGS*). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Felipe Balbi <felipe.balbi@nokia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
67 lines
2.2 KiB
C
67 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>
|
|
|
|
/*
|
|
* 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;
|
|
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 */
|
|
|
|
/* 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);
|
|
|
|
/* 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 */
|