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line.h
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1 /*
2  * Copyright (C) 2001, 2002 Jeff Dike ([email protected])
3  * Licensed under the GPL
4  */
5 
6 #ifndef __LINE_H__
7 #define __LINE_H__
8 
9 #include <linux/list.h>
10 #include <linux/workqueue.h>
11 #include <linux/tty.h>
12 #include <linux/interrupt.h>
13 #include <linux/spinlock.h>
14 #include <linux/mutex.h>
15 #include "chan_user.h"
16 #include "mconsole_kern.h"
17 
18 /* There's only two modifiable fields in this - .mc.list and .driver */
19 struct line_driver {
20  const char *name;
21  const char *device_name;
22  const short major;
23  const short minor_start;
24  const short type;
25  const short subtype;
26  const int read_irq;
27  const char *read_irq_name;
28  const int write_irq;
29  const char *write_irq_name;
30  struct mc_device mc;
31  struct tty_driver *driver;
32 };
33 
34 struct line {
35  struct tty_port port;
36  int valid;
37 
38  char *init_str;
40  struct chan *chan_in, *chan_out;
41 
42  /*This lock is actually, mostly, local to*/
44  int throttled;
45  /* Yes, this is a real circular buffer.
46  * XXX: And this should become a struct kfifo!
47  *
48  * buffer points to a buffer allocated on demand, of length
49  * LINE_BUFSIZE, head to the start of the ring, tail to the end.*/
50  char *buffer;
51  char *head;
52  char *tail;
53 
54  int sigio;
56  const struct line_driver *driver;
57 };
58 
59 extern void line_close(struct tty_struct *tty, struct file * filp);
60 extern int line_open(struct tty_struct *tty, struct file *filp);
61 extern int line_install(struct tty_driver *driver, struct tty_struct *tty,
62  struct line *line);
63 extern void line_cleanup(struct tty_struct *tty);
64 extern void line_hangup(struct tty_struct *tty);
65 extern int line_setup(char **conf, unsigned nlines, char **def,
66  char *init, char *name);
67 extern int line_write(struct tty_struct *tty, const unsigned char *buf,
68  int len);
69 extern int line_put_char(struct tty_struct *tty, unsigned char ch);
70 extern void line_set_termios(struct tty_struct *tty, struct ktermios * old);
71 extern int line_chars_in_buffer(struct tty_struct *tty);
72 extern void line_flush_buffer(struct tty_struct *tty);
73 extern void line_flush_chars(struct tty_struct *tty);
74 extern int line_write_room(struct tty_struct *tty);
75 extern void line_throttle(struct tty_struct *tty);
76 extern void line_unthrottle(struct tty_struct *tty);
77 
78 extern char *add_xterm_umid(char *base);
79 extern int line_setup_irq(int fd, int input, int output, struct line *line,
80  void *data);
81 extern void line_close_chan(struct line *line);
82 extern int register_lines(struct line_driver *line_driver,
83  const struct tty_operations *driver,
84  struct line *lines, int nlines);
85 extern int setup_one_line(struct line *lines, int n, char *init,
86  const struct chan_opts *opts, char **error_out);
87 extern void close_lines(struct line *lines, int nlines);
88 
89 extern int line_config(struct line *lines, unsigned int sizeof_lines,
90  char *str, const struct chan_opts *opts,
91  char **error_out);
92 extern int line_id(char **str, int *start_out, int *end_out);
93 extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n,
94  char **error_out);
95 extern int line_get_config(char *dev, struct line *lines,
96  unsigned int sizeof_lines, char *str,
97  int size, char **error_out);
98 
99 #endif