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/*
* Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#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 one modifiable field in this - .mc.list */
struct line_driver {
const char *name;
const char *device_name;
const short major;
const short minor_start;
const short type;
const short subtype;
const int read_irq;
const char *read_irq_name;
const int write_irq;
const char *write_irq_name;
struct mc_device mc;
};
struct line {
struct tty_struct *tty;
spinlock_t count_lock;
int valid;
char *init_str;
int init_pri;
struct list_head chan_list;
/*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;
int have_irq;
};
#define LINE_INIT(str, d) \
{ .count_lock = __SPIN_LOCK_UNLOCKED((str).count_lock), \
.init_str = str, \
.init_pri = INIT_STATIC, \
.valid = 1, \
.lock = __SPIN_LOCK_UNLOCKED((str).lock), \
.driver = d }
extern void line_close(struct tty_struct *tty, struct file * filp);
extern int line_open(struct line *lines, struct tty_struct *tty);
extern int line_setup(struct line *lines, unsigned int sizeof_lines,
char *init, char **error_out);
extern int line_write(struct tty_struct *tty, const unsigned char *buf,
int len);
extern int line_put_char(struct tty_struct *tty, unsigned char ch);
extern void line_set_termios(struct tty_struct *tty, struct ktermios * old);
extern 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 int line_write_room(struct tty_struct *tty);
extern int line_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg);
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 struct tty_driver *register_lines(struct line_driver *line_driver,
const struct tty_operations *driver,
struct line *lines, int nlines);
extern void lines_init(struct line *lines, int nlines, struct chan_opts *opts);
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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