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         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           throttled :   0, \
  65           lock :        SPIN_LOCK_UNLOCKED, \
  66           buffer :      NULL, \
  67           head :        NULL, \
  68           tail :        NULL, \
  69           sigio :       0, \
  70           driver :      d, \
  71           have_irq :    0 }
  72
  73 struct lines {
  74         int num;
  75 };
  76
  77 #define LINES_INIT(n) {  num :          n }
  78
  79 extern void line_close(struct tty_struct *tty, struct file * filp);
  80 extern int line_open(struct line *lines, struct tty_struct *tty);
  81 extern int line_setup(struct line *lines, unsigned int sizeof_lines,
  82                       char *init);
  83 extern int line_write(struct tty_struct *tty, const unsigned char *buf,
  84                       int len);
  85 extern void line_put_char(struct tty_struct *tty, unsigned char ch);
  86 extern void line_set_termios(struct tty_struct *tty, struct termios * old);
  87 extern int line_chars_in_buffer(struct tty_struct *tty);
  88 extern void line_flush_buffer(struct tty_struct *tty);
  89 extern void line_flush_chars(struct tty_struct *tty);
  90 extern int line_write_room(struct tty_struct *tty);
  91 extern int line_ioctl(struct tty_struct *tty, struct file * file,
  92                       unsigned int cmd, unsigned long arg);
  93 extern void line_throttle(struct tty_struct *tty);
  94 extern void line_unthrottle(struct tty_struct *tty);
  95
  96 extern char *add_xterm_umid(char *base);
  97 extern int line_setup_irq(int fd, int input, int output, struct line *line,
  98                           void *data);
  99 extern void line_close_chan(struct line *line);
 100 extern struct tty_driver * line_register_devfs(struct lines *set,
 101                                 struct line_driver *line_driver,
 102                                 struct tty_operations *driver,
 103                                 struct line *lines,
 104                                 int nlines);
 105 extern void lines_init(struct line *lines, int nlines, struct chan_opts *opts);
 106 extern void close_lines(struct line *lines, int nlines);
 107
 108 extern int line_config(struct line *lines, unsigned int sizeof_lines,
 109                        char *str, struct chan_opts *opts);
 110 extern int line_id(char **str, int *start_out, int *end_out);
 111 extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n);
 112 extern int line_get_config(char *dev, struct line *lines,
 113                            unsigned int sizeof_lines, char *str,
 114                            int size, char **error_out);
 115
 116 #endif