linux/arch/um/drivers/line.h
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   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 two modifiable fields in this - .mc.list and .driver */
  19struct 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
  34struct line {
  35        struct tty_struct *tty;
  36        struct mutex count_lock;
  37        unsigned long count;
  38        int valid;
  39
  40        char *init_str;
  41        struct list_head chan_list;
  42        struct chan *chan_in, *chan_out;
  43
  44        /*This lock is actually, mostly, local to*/
  45        spinlock_t lock;
  46        int throttled;
  47        /* Yes, this is a real circular buffer.
  48         * XXX: And this should become a struct kfifo!
  49         *
  50         * buffer points to a buffer allocated on demand, of length
  51         * LINE_BUFSIZE, head to the start of the ring, tail to the end.*/
  52        char *buffer;
  53        char *head;
  54        char *tail;
  55
  56        int sigio;
  57        struct delayed_work task;
  58        const struct line_driver *driver;
  59};
  60
  61extern void line_close(struct tty_struct *tty, struct file * filp);
  62extern int line_open(struct line *lines, struct tty_struct *tty);
  63extern int line_setup(char **conf, unsigned nlines, char **def,
  64                      char *init, char *name);
  65extern int line_write(struct tty_struct *tty, const unsigned char *buf,
  66                      int len);
  67extern int line_put_char(struct tty_struct *tty, unsigned char ch);
  68extern void line_set_termios(struct tty_struct *tty, struct ktermios * old);
  69extern int line_chars_in_buffer(struct tty_struct *tty);
  70extern void line_flush_buffer(struct tty_struct *tty);
  71extern void line_flush_chars(struct tty_struct *tty);
  72extern int line_write_room(struct tty_struct *tty);
  73extern int line_ioctl(struct tty_struct *tty, unsigned int cmd,
  74                                unsigned long arg);
  75extern void line_throttle(struct tty_struct *tty);
  76extern void line_unthrottle(struct tty_struct *tty);
  77
  78extern char *add_xterm_umid(char *base);
  79extern int line_setup_irq(int fd, int input, int output, struct line *line,
  80                          void *data);
  81extern void line_close_chan(struct line *line);
  82extern int register_lines(struct line_driver *line_driver,
  83                          const struct tty_operations *driver,
  84                          struct line *lines, int nlines);
  85extern int setup_one_line(struct line *lines, int n, char *init,
  86                          const struct chan_opts *opts, char **error_out);
  87extern void close_lines(struct line *lines, int nlines);
  88
  89extern int line_config(struct line *lines, unsigned int sizeof_lines,
  90                       char *str, const struct chan_opts *opts,
  91                       char **error_out);
  92extern int line_id(char **str, int *start_out, int *end_out);
  93extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n,
  94                       char **error_out);
  95extern 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
 100
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