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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
*/
#ifndef __LINE_H__
#define __LINE_H__
#include <linux/list.h>
#include <linux/workqueue.h>
#include <linux/tty.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include "chan_user.h"
#include "mconsole_kern.h"
/* There's only two modifiable fields in this - .mc.list and .driver */
struct line_driver {
const char *name;
const char *device_name;
const short major;
const short minor_start;
const short type;
const short subtype;
const char *read_irq_name;
const char *write_irq_name;
struct mc_device mc;
struct tty_driver *driver;
};
struct line {
struct tty_port port;
int valid;
int read_irq, write_irq;
char *init_str;
struct list_head chan_list;
struct chan *chan_in, *chan_out;
/*This lock is actually, mostly, local to*/
spinlock_t lock;
int throttled;
/* Yes, this is a real circular buffer.
* XXX: And this should become a struct kfifo!
*
* buffer points to a buffer allocated on demand, of length
* LINE_BUFSIZE, head to the start of the ring, tail to the end.*/
char *buffer;
char *head;
char *tail;
int sigio;
struct delayed_work task;
const struct line_driver *driver;
};
extern void line_close(struct tty_struct *tty, struct file * filp);
extern int line_open(struct tty_struct *tty, struct file *filp);
extern int line_install(struct tty_driver *driver, struct tty_struct *tty,
struct line *line);
extern void line_cleanup(struct tty_struct *tty);
extern void line_hangup(struct tty_struct *tty);
extern int line_setup(char **conf, unsigned nlines, char **def,
char *init, char *name);
extern ssize_t line_write(struct tty_struct *tty, const u8 *buf, size_t len);
extern unsigned int line_chars_in_buffer(struct tty_struct *tty);
extern void line_flush_buffer(struct tty_struct *tty);
extern void line_flush_chars(struct tty_struct *tty);
extern unsigned int line_write_room(struct tty_struct *tty);
extern void line_throttle(struct tty_struct *tty);
extern void line_unthrottle(struct tty_struct *tty);
extern char *add_xterm_umid(char *base);
extern int line_setup_irq(int fd, int input, int output, struct line *line,
void *data);
extern void line_close_chan(struct line *line);
extern int register_lines(struct line_driver *line_driver,
const struct tty_operations *driver,
struct line *lines, int nlines);
extern int setup_one_line(struct line *lines, int n, char *init,
const struct chan_opts *opts, char **error_out);
extern void close_lines(struct line *lines, int nlines);
extern int line_config(struct line *lines, unsigned int sizeof_lines,
char *str, const struct chan_opts *opts,
char **error_out);
extern int line_id(char **str, int *start_out, int *end_out);
extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n,
char **error_out);
extern int line_get_config(char *dev, struct line *lines,
unsigned int sizeof_lines, char *str,
int size, char **error_out);
#endif
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