Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
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 "chan_user.h"
15#include "mconsole_kern.h"
16
17struct line_driver {
18 char *name;
19 char *device_name;
20 char *devfs_name;
21 short major;
22 short minor_start;
23 short type;
24 short subtype;
25 int read_irq;
26 char *read_irq_name;
27 int write_irq;
28 char *write_irq_name;
29 char *symlink_from;
30 char *symlink_to;
31 struct mc_device mc;
32};
33
34struct line {
35 struct tty_struct *tty;
36 char *init_str;
37 int init_pri;
38 struct list_head chan_list;
39 int valid;
40 int count;
41 int throttled;
42 /*This lock is actually, mostly, local to*/
43 spinlock_t lock;
44
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;
55 struct work_struct task;
56 struct line_driver *driver;
57 int have_irq;
58};
59
60#define LINE_INIT(str, d) \
61 { .init_str = str, \
62 .init_pri = INIT_STATIC, \
63 .valid = 1, \
64 .lock = SPIN_LOCK_UNLOCKED, \
65 .driver = d }
66
67struct lines {
68 int num;
69};
70
71#define LINES_INIT(n) { .num = n }
72
73extern void line_close(struct tty_struct *tty, struct file * filp);
74extern int line_open(struct line *lines, struct tty_struct *tty);
75extern int line_setup(struct line *lines, unsigned int sizeof_lines,
76 char *init);
77extern int line_write(struct tty_struct *tty, const unsigned char *buf,
78 int len);
79extern void line_put_char(struct tty_struct *tty, unsigned char ch);
80extern void line_set_termios(struct tty_struct *tty, struct termios * old);
81extern int line_chars_in_buffer(struct tty_struct *tty);
82extern void line_flush_buffer(struct tty_struct *tty);
83extern void line_flush_chars(struct tty_struct *tty);
84extern int line_write_room(struct tty_struct *tty);
85extern int line_ioctl(struct tty_struct *tty, struct file * file,
86 unsigned int cmd, unsigned long arg);
87extern void line_throttle(struct tty_struct *tty);
88extern void line_unthrottle(struct tty_struct *tty);
89
90extern char *add_xterm_umid(char *base);
91extern int line_setup_irq(int fd, int input, int output, struct line *line,
92 void *data);
93extern void line_close_chan(struct line *line);
94extern struct tty_driver * line_register_devfs(struct lines *set,
95 struct line_driver *line_driver,
96 struct tty_operations *driver,
97 struct line *lines,
98 int nlines);
99extern void lines_init(struct line *lines, int nlines, struct chan_opts *opts);
100extern void close_lines(struct line *lines, int nlines);
101
102extern int line_config(struct line *lines, unsigned int sizeof_lines,
103 char *str, struct chan_opts *opts);
104extern int line_id(char **str, int *start_out, int *end_out);
105extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n);
106extern int line_get_config(char *dev, struct line *lines,
107 unsigned int sizeof_lines, char *str,
108 int size, char **error_out);
109
110#endif