arch/um/include/line.h

   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
  17 struct 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
  34 struct line {
  35         char *init_str;
  36         int init_pri;
  37         struct list_head chan_list;
  38         int valid;
  39         int count;
  40         /*This lock is actually, mostly, local to*/
  41         spinlock_t lock;
  42
  43         /* Yes, this is a real circular buffer.
  44          * XXX: And this should become a struct kfifo!
  45          *
  46          * buffer points to a buffer allocated on demand, of length
  47          * LINE_BUFSIZE, head to the start of the ring, tail to the end.*/
  48         char *buffer;
  49         char *head;
  50         char *tail;
  51
  52         int sigio;
  53         struct work_struct task;
  54         struct line_driver *driver;
  55         int have_irq;
  56 };
  57
  58 #define LINE_INIT(str, d) \
  59         { init_str :    str, \
  60           init_pri :    INIT_STATIC, \
  61           chan_list :   { }, \
  62           valid :       1, \
  63           buffer :      NULL, \
  64           head :        NULL, \
  65           tail :        NULL, \
  66           sigio :       0, \
  67           driver :      d, \
  68           have_irq :    0 }
  69
  70 struct lines {
  71         int num;
  72 };
  73
  74 #define LINES_INIT(n) {  num :          n }
  75
  76 extern void line_close(struct tty_struct *tty, struct file * filp);
  77 extern int line_open(struct line *lines, struct tty_struct *tty,
  78                      struct chan_opts *opts);
  79 extern int line_setup(struct line *lines, unsigned int sizeof_lines, char *init,
  80                       int all_allowed);
  81 extern int line_write(struct tty_struct *tty, const unsigned char *buf, int len);
  82 extern void line_put_char(struct tty_struct *tty, unsigned char ch);
  83 extern void line_set_termios(struct tty_struct *tty, struct termios * old);
  84 extern int line_chars_in_buffer(struct tty_struct *tty);
  85 extern void line_flush_buffer(struct tty_struct *tty);
  86 extern void line_flush_chars(struct tty_struct *tty);
  87 extern int line_write_room(struct tty_struct *tty);
  88 extern int line_ioctl(struct tty_struct *tty, struct file * file,
  89                       unsigned int cmd, unsigned long arg);
  90
  91 extern char *add_xterm_umid(char *base);
  92 extern int line_setup_irq(int fd, int input, int output, struct tty_struct *tty);
  93 extern void line_close_chan(struct line *line);
  94 extern void line_disable(struct tty_struct *tty, int current_irq);
  95 extern struct tty_driver * line_register_devfs(struct lines *set,
  96                                 struct line_driver *line_driver,
  97                                 struct tty_operations *driver,
  98                                 struct line *lines,
  99                                 int nlines);
 100 extern void lines_init(struct line *lines, int nlines);
 101 extern void close_lines(struct line *lines, int nlines);
 102
 103 extern int line_config(struct line *lines, unsigned int sizeof_lines, char *str);
 104 extern int line_remove(struct line *lines, unsigned int sizeof_lines, char *str);
 105 extern int line_get_config(char *dev, struct line *lines, unsigned int sizeof_lines, char *str,
 106                            int size, char **error_out);
 107
 108 #endif