1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
 4 */
 5
 6#ifndef __CHAN_USER_H__
 7#define __CHAN_USER_H__
 8
 9#include <init.h>
10
11struct chan_opts {
12	void (*const announce)(char *dev_name, int dev);
13	char *xterm_title;
14	int raw;
15};
16
17struct chan_ops {
18	char *type;
19	void *(*init)(char *, int, const struct chan_opts *);
20	int (*open)(int, int, int, void *, char **);
21	void (*close)(int, void *);
22	int (*read)(int, char *, void *);
23	int (*write)(int, const char *, int, void *);
24	int (*console_write)(int, const char *, int);
25	int (*window_size)(int, void *, unsigned short *, unsigned short *);
26	void (*free)(void *);
27	int winch;
28};
29
30extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,
31	tty_ops, xterm_ops;
32
33extern void generic_close(int fd, void *unused);
34extern int generic_read(int fd, char *c_out, void *unused);
35extern int generic_write(int fd, const char *buf, int n, void *unused);
36extern int generic_console_write(int fd, const char *buf, int n);
37extern int generic_window_size(int fd, void *unused, unsigned short *rows_out,
38			       unsigned short *cols_out);
39extern void generic_free(void *data);
40
41struct tty_port;
42extern void register_winch(int fd,  struct tty_port *port);
43extern void register_winch_irq(int fd, int tty_fd, int pid,
44			       struct tty_port *port, unsigned long stack);
45
46#define __channel_help(fn, prefix) \
47__uml_help(fn, prefix "[0-9]*=<channel description>\n" \
48"    Attach a console or serial line to a host channel.  See\n" \
49"    http://user-mode-linux.sourceforge.net/old/input.html for a complete\n" \
50"    description of this switch.\n\n" \
51);
52
53#endif