| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 */ |
| 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 | struct tty_driver *driver; |
| 32 | }; |
| 33 | |
| 34 | struct line { |
| 35 | struct tty_port port; |
| 36 | int valid; |
| 37 | |
| 38 | char *init_str; |
| 39 | struct list_head chan_list; |
| 40 | struct chan *chan_in, *chan_out; |
| 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 | }; |
| 58 | |
| 59 | extern void line_close(struct tty_struct *tty, struct file * filp); |
| 60 | extern int line_open(struct tty_struct *tty, struct file *filp); |
| 61 | extern int line_install(struct tty_driver *driver, struct tty_struct *tty, |
| 62 | struct line *line); |
| 63 | extern void line_cleanup(struct tty_struct *tty); |
| 64 | extern void line_hangup(struct tty_struct *tty); |
| 65 | extern int line_setup(char **conf, unsigned nlines, char **def, |
| 66 | char *init, char *name); |
| 67 | extern int line_write(struct tty_struct *tty, const unsigned char *buf, |
| 68 | int len); |
| 69 | extern int line_put_char(struct tty_struct *tty, unsigned char ch); |
| 70 | extern void line_set_termios(struct tty_struct *tty, struct ktermios * old); |
| 71 | extern int line_chars_in_buffer(struct tty_struct *tty); |
| 72 | extern void line_flush_buffer(struct tty_struct *tty); |
| 73 | extern void line_flush_chars(struct tty_struct *tty); |
| 74 | extern int line_write_room(struct tty_struct *tty); |
| 75 | extern void line_throttle(struct tty_struct *tty); |
| 76 | extern void line_unthrottle(struct tty_struct *tty); |
| 77 | |
| 78 | extern char *add_xterm_umid(char *base); |
| 79 | extern int line_setup_irq(int fd, int input, int output, struct line *line, |
| 80 | void *data); |
| 81 | extern void line_close_chan(struct line *line); |
| 82 | extern int register_lines(struct line_driver *line_driver, |
| 83 | const struct tty_operations *driver, |
| 84 | struct line *lines, int nlines); |
| 85 | extern int setup_one_line(struct line *lines, int n, char *init, |
| 86 | const struct chan_opts *opts, char **error_out); |
| 87 | extern void close_lines(struct line *lines, int nlines); |
| 88 | |
| 89 | extern int line_config(struct line *lines, unsigned int sizeof_lines, |
| 90 | char *str, const struct chan_opts *opts, |
| 91 | char **error_out); |
| 92 | extern int line_id(char **str, int *start_out, int *end_out); |
| 93 | extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n, |
| 94 | char **error_out); |
| 95 | extern 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 |