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 "linux/mutex.h"
15 #include "chan_user.h"
16 #include "mconsole_kern.h"
17
18 /* There's only one modifiable field in this - .mc.list */
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 };
32
33 struct line {
34 struct tty_struct *tty;
35 spinlock_t count_lock;
36 int valid;
37
38 char *init_str;
39 int init_pri;
40 struct list_head chan_list;
41
42 /*This lock is actually, mostly, local to*/
43 spinlock_t lock;
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;
55 struct delayed_work task;
56 const struct line_driver *driver;
57 int have_irq;
58 };
59
60 #define LINE_INIT(str, d) \
61 { .count_lock = __SPIN_LOCK_UNLOCKED((str).count_lock), \
62 .init_str = str, \
63 .init_pri = INIT_STATIC, \
64 .valid = 1, \
65 .lock = __SPIN_LOCK_UNLOCKED((str).lock), \
66 .driver = d }
67
68 extern void line_close(struct tty_struct *tty, struct file * filp);
69 extern int line_open(struct line *lines, struct tty_struct *tty);
70 extern int line_setup(struct line *lines, unsigned int sizeof_lines,
71 char *init, char **error_out);
72 extern int line_write(struct tty_struct *tty, const unsigned char *buf,
73 int len);
74 extern int line_put_char(struct tty_struct *tty, unsigned char ch);
75 extern void line_set_termios(struct tty_struct *tty, struct ktermios * old);
76 extern int line_chars_in_buffer(struct tty_struct *tty);
77 extern void line_flush_buffer(struct tty_struct *tty);
78 extern void line_flush_chars(struct tty_struct *tty);
79 extern int line_write_room(struct tty_struct *tty);
80 extern int line_ioctl(struct tty_struct *tty, struct file * file,
81 unsigned int cmd, unsigned long arg);
82 extern void line_throttle(struct tty_struct *tty);
83 extern void line_unthrottle(struct tty_struct *tty);
84
85 extern char *add_xterm_umid(char *base);
86 extern int line_setup_irq(int fd, int input, int output, struct line *line,
87 void *data);
88 extern void line_close_chan(struct line *line);
89 extern struct tty_driver *register_lines(struct line_driver *line_driver,
90 const struct tty_operations *driver,
91 struct line *lines, int nlines);
92 extern void lines_init(struct line *lines, int nlines, struct chan_opts *opts);
93 extern void close_lines(struct line *lines, int nlines);
94
95 extern int line_config(struct line *lines, unsigned int sizeof_lines,
96 char *str, const struct chan_opts *opts,
97 char **error_out);
98 extern int line_id(char **str, int *start_out, int *end_out);
99 extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n,
100 char **error_out);
101 extern int line_get_config(char *dev, struct line *lines,
102 unsigned int sizeof_lines, char *str,
103 int size, char **error_out);
104
105 #endif
106
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