1*510c72a3SAl Viro /* 2*510c72a3SAl Viro * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) 3*510c72a3SAl Viro * Licensed under the GPL 4*510c72a3SAl Viro */ 5*510c72a3SAl Viro 6*510c72a3SAl Viro #ifndef __LINE_H__ 7*510c72a3SAl Viro #define __LINE_H__ 8*510c72a3SAl Viro 9*510c72a3SAl Viro #include "linux/list.h" 10*510c72a3SAl Viro #include "linux/workqueue.h" 11*510c72a3SAl Viro #include "linux/tty.h" 12*510c72a3SAl Viro #include "linux/interrupt.h" 13*510c72a3SAl Viro #include "linux/spinlock.h" 14*510c72a3SAl Viro #include "linux/mutex.h" 15*510c72a3SAl Viro #include "chan_user.h" 16*510c72a3SAl Viro #include "mconsole_kern.h" 17*510c72a3SAl Viro 18*510c72a3SAl Viro /* There's only one modifiable field in this - .mc.list */ 19*510c72a3SAl Viro struct line_driver { 20*510c72a3SAl Viro const char *name; 21*510c72a3SAl Viro const char *device_name; 22*510c72a3SAl Viro const short major; 23*510c72a3SAl Viro const short minor_start; 24*510c72a3SAl Viro const short type; 25*510c72a3SAl Viro const short subtype; 26*510c72a3SAl Viro const int read_irq; 27*510c72a3SAl Viro const char *read_irq_name; 28*510c72a3SAl Viro const int write_irq; 29*510c72a3SAl Viro const char *write_irq_name; 30*510c72a3SAl Viro struct mc_device mc; 31*510c72a3SAl Viro }; 32*510c72a3SAl Viro 33*510c72a3SAl Viro struct line { 34*510c72a3SAl Viro struct tty_struct *tty; 35*510c72a3SAl Viro spinlock_t count_lock; 36*510c72a3SAl Viro unsigned long count; 37*510c72a3SAl Viro int valid; 38*510c72a3SAl Viro 39*510c72a3SAl Viro char *init_str; 40*510c72a3SAl Viro int init_pri; 41*510c72a3SAl Viro struct list_head chan_list; 42*510c72a3SAl Viro 43*510c72a3SAl Viro /*This lock is actually, mostly, local to*/ 44*510c72a3SAl Viro spinlock_t lock; 45*510c72a3SAl Viro int throttled; 46*510c72a3SAl Viro /* Yes, this is a real circular buffer. 47*510c72a3SAl Viro * XXX: And this should become a struct kfifo! 48*510c72a3SAl Viro * 49*510c72a3SAl Viro * buffer points to a buffer allocated on demand, of length 50*510c72a3SAl Viro * LINE_BUFSIZE, head to the start of the ring, tail to the end.*/ 51*510c72a3SAl Viro char *buffer; 52*510c72a3SAl Viro char *head; 53*510c72a3SAl Viro char *tail; 54*510c72a3SAl Viro 55*510c72a3SAl Viro int sigio; 56*510c72a3SAl Viro struct delayed_work task; 57*510c72a3SAl Viro const struct line_driver *driver; 58*510c72a3SAl Viro int have_irq; 59*510c72a3SAl Viro }; 60*510c72a3SAl Viro 61*510c72a3SAl Viro #define LINE_INIT(str, d) \ 62*510c72a3SAl Viro { .count_lock = __SPIN_LOCK_UNLOCKED((str).count_lock), \ 63*510c72a3SAl Viro .init_str = str, \ 64*510c72a3SAl Viro .init_pri = INIT_STATIC, \ 65*510c72a3SAl Viro .valid = 1, \ 66*510c72a3SAl Viro .lock = __SPIN_LOCK_UNLOCKED((str).lock), \ 67*510c72a3SAl Viro .driver = d } 68*510c72a3SAl Viro 69*510c72a3SAl Viro extern void line_close(struct tty_struct *tty, struct file * filp); 70*510c72a3SAl Viro extern int line_open(struct line *lines, struct tty_struct *tty); 71*510c72a3SAl Viro extern int line_setup(struct line *lines, unsigned int sizeof_lines, 72*510c72a3SAl Viro char *init, char **error_out); 73*510c72a3SAl Viro extern int line_write(struct tty_struct *tty, const unsigned char *buf, 74*510c72a3SAl Viro int len); 75*510c72a3SAl Viro extern int line_put_char(struct tty_struct *tty, unsigned char ch); 76*510c72a3SAl Viro extern void line_set_termios(struct tty_struct *tty, struct ktermios * old); 77*510c72a3SAl Viro extern int line_chars_in_buffer(struct tty_struct *tty); 78*510c72a3SAl Viro extern void line_flush_buffer(struct tty_struct *tty); 79*510c72a3SAl Viro extern void line_flush_chars(struct tty_struct *tty); 80*510c72a3SAl Viro extern int line_write_room(struct tty_struct *tty); 81*510c72a3SAl Viro extern int line_ioctl(struct tty_struct *tty, unsigned int cmd, 82*510c72a3SAl Viro unsigned long arg); 83*510c72a3SAl Viro extern void line_throttle(struct tty_struct *tty); 84*510c72a3SAl Viro extern void line_unthrottle(struct tty_struct *tty); 85*510c72a3SAl Viro 86*510c72a3SAl Viro extern char *add_xterm_umid(char *base); 87*510c72a3SAl Viro extern int line_setup_irq(int fd, int input, int output, struct line *line, 88*510c72a3SAl Viro void *data); 89*510c72a3SAl Viro extern void line_close_chan(struct line *line); 90*510c72a3SAl Viro extern struct tty_driver *register_lines(struct line_driver *line_driver, 91*510c72a3SAl Viro const struct tty_operations *driver, 92*510c72a3SAl Viro struct line *lines, int nlines); 93*510c72a3SAl Viro extern void lines_init(struct line *lines, int nlines, struct chan_opts *opts); 94*510c72a3SAl Viro extern void close_lines(struct line *lines, int nlines); 95*510c72a3SAl Viro 96*510c72a3SAl Viro extern int line_config(struct line *lines, unsigned int sizeof_lines, 97*510c72a3SAl Viro char *str, const struct chan_opts *opts, 98*510c72a3SAl Viro char **error_out); 99*510c72a3SAl Viro extern int line_id(char **str, int *start_out, int *end_out); 100*510c72a3SAl Viro extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n, 101*510c72a3SAl Viro char **error_out); 102*510c72a3SAl Viro extern int line_get_config(char *dev, struct line *lines, 103*510c72a3SAl Viro unsigned int sizeof_lines, char *str, 104*510c72a3SAl Viro int size, char **error_out); 105*510c72a3SAl Viro 106*510c72a3SAl Viro #endif 107