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