diff options
Diffstat (limited to 'include/linux/tty.h')
| -rw-r--r-- | include/linux/tty.h | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h new file mode 100644 index 000000000..c177902b5 --- /dev/null +++ b/include/linux/tty.h @@ -0,0 +1,334 @@ +#ifndef _LINUX_TTY_H +#define _LINUX_TTY_H + +/* + * 'tty.h' defines some structures used by tty_io.c and some defines. + */ + +#ifdef __KERNEL__ +#include <linux/fs.h> +#include <linux/termios.h> +#include <linux/tqueue.h> +#include <linux/tty_driver.h> +#include <linux/tty_ldisc.h> + +#include <asm/system.h> + + +/* + * Note: don't mess with NR_PTYS until you understand the tty minor + * number allocation game... + * (Note: the *_driver.minor_start values 1, 64, 128, 192 are + * hardcoded at present.) + */ +#define MIN_NR_CONSOLES 1 /* must be at least 1 */ +#define MAX_NR_CONSOLES 63 /* serial lines start at 64 */ +#define MAX_NR_USER_CONSOLES 63 /* must be root to allocate above this */ + /* Note: the ioctl VT_GETSTATE does not work for + consoles 16 and higher (since it returns a short) */ +#define NR_PTYS 64 +#define NR_LDISCS 16 + +/* + * These are set up by the setup-routine at boot-time: + */ + +struct screen_info { + unsigned char orig_x; + unsigned char orig_y; + unsigned char unused1[2]; + unsigned short orig_video_page; + unsigned char orig_video_mode; + unsigned char orig_video_cols; + unsigned short orig_video_ega_ax; + unsigned short orig_video_ega_bx; + unsigned short orig_video_ega_cx; + unsigned char orig_video_lines; +}; + +extern struct screen_info screen_info; + +#define ORIG_X (screen_info.orig_x) +#define ORIG_Y (screen_info.orig_y) +#define ORIG_VIDEO_PAGE (screen_info.orig_video_page) +#define ORIG_VIDEO_MODE (screen_info.orig_video_mode) +#define ORIG_VIDEO_COLS (screen_info.orig_video_cols) +#define ORIG_VIDEO_EGA_AX (screen_info.orig_video_ega_ax) +#define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx) +#define ORIG_VIDEO_EGA_CX (screen_info.orig_video_ega_cx) +#define ORIG_VIDEO_LINES (screen_info.orig_video_lines) + +#define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */ +#define VIDEO_TYPE_CGA 0x11 /* CGA Display */ +#define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */ +#define VIDEO_TYPE_EGAC 0x21 /* EGA/VGA in Color Mode */ + +/* + * This character is the same as _POSIX_VDISABLE: it cannot be used as + * a c_cc[] character, but indicates that a particular special character + * isn't in use (eg VINTR has no character etc) + */ +#define __DISABLED_CHAR '\0' + +/* + * This is the flip buffer used for the tty driver. The buffer is + * located in the tty structure, and is used as a high speed interface + * between the tty driver and the tty line discipline. + */ +#define TTY_FLIPBUF_SIZE 512 + +struct tty_flip_buffer { + struct tq_struct tqueue; + unsigned char char_buf[2*TTY_FLIPBUF_SIZE]; + char flag_buf[2*TTY_FLIPBUF_SIZE]; + char *char_buf_ptr; + unsigned char *flag_buf_ptr; + int count; + int buf_num; +}; + +/* + * When a break, frame error, or parity error happens, these codes are + * stuffed into the flags buffer. + */ +#define TTY_NORMAL 0 +#define TTY_BREAK 1 +#define TTY_FRAME 2 +#define TTY_PARITY 3 +#define TTY_OVERRUN 4 + +#define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR]) +#define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT]) +#define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE]) +#define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL]) +#define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF]) +#define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME]) +#define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN]) +#define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC]) +#define START_CHAR(tty) ((tty)->termios->c_cc[VSTART]) +#define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP]) +#define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP]) +#define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL]) +#define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT]) +#define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD]) +#define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE]) +#define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT]) +#define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2]) + +#define _I_FLAG(tty,f) ((tty)->termios->c_iflag & (f)) +#define _O_FLAG(tty,f) ((tty)->termios->c_oflag & (f)) +#define _C_FLAG(tty,f) ((tty)->termios->c_cflag & (f)) +#define _L_FLAG(tty,f) ((tty)->termios->c_lflag & (f)) + +#define I_IGNBRK(tty) _I_FLAG((tty),IGNBRK) +#define I_BRKINT(tty) _I_FLAG((tty),BRKINT) +#define I_IGNPAR(tty) _I_FLAG((tty),IGNPAR) +#define I_PARMRK(tty) _I_FLAG((tty),PARMRK) +#define I_INPCK(tty) _I_FLAG((tty),INPCK) +#define I_ISTRIP(tty) _I_FLAG((tty),ISTRIP) +#define I_INLCR(tty) _I_FLAG((tty),INLCR) +#define I_IGNCR(tty) _I_FLAG((tty),IGNCR) +#define I_ICRNL(tty) _I_FLAG((tty),ICRNL) +#define I_IUCLC(tty) _I_FLAG((tty),IUCLC) +#define I_IXON(tty) _I_FLAG((tty),IXON) +#define I_IXANY(tty) _I_FLAG((tty),IXANY) +#define I_IXOFF(tty) _I_FLAG((tty),IXOFF) +#define I_IMAXBEL(tty) _I_FLAG((tty),IMAXBEL) + +#define O_OPOST(tty) _O_FLAG((tty),OPOST) +#define O_OLCUC(tty) _O_FLAG((tty),OLCUC) +#define O_ONLCR(tty) _O_FLAG((tty),ONLCR) +#define O_OCRNL(tty) _O_FLAG((tty),OCRNL) +#define O_ONOCR(tty) _O_FLAG((tty),ONOCR) +#define O_ONLRET(tty) _O_FLAG((tty),ONLRET) +#define O_OFILL(tty) _O_FLAG((tty),OFILL) +#define O_OFDEL(tty) _O_FLAG((tty),OFDEL) +#define O_NLDLY(tty) _O_FLAG((tty),NLDLY) +#define O_CRDLY(tty) _O_FLAG((tty),CRDLY) +#define O_TABDLY(tty) _O_FLAG((tty),TABDLY) +#define O_BSDLY(tty) _O_FLAG((tty),BSDLY) +#define O_VTDLY(tty) _O_FLAG((tty),VTDLY) +#define O_FFDLY(tty) _O_FLAG((tty),FFDLY) + +#define C_BAUD(tty) _C_FLAG((tty),CBAUD) +#define C_CSIZE(tty) _C_FLAG((tty),CSIZE) +#define C_CSTOPB(tty) _C_FLAG((tty),CSTOPB) +#define C_CREAD(tty) _C_FLAG((tty),CREAD) +#define C_PARENB(tty) _C_FLAG((tty),PARENB) +#define C_PARODD(tty) _C_FLAG((tty),PARODD) +#define C_HUPCL(tty) _C_FLAG((tty),HUPCL) +#define C_CLOCAL(tty) _C_FLAG((tty),CLOCAL) +#define C_CIBAUD(tty) _C_FLAG((tty),CIBAUD) +#define C_CRTSCTS(tty) _C_FLAG((tty),CRTSCTS) + +#define L_ISIG(tty) _L_FLAG((tty),ISIG) +#define L_ICANON(tty) _L_FLAG((tty),ICANON) +#define L_XCASE(tty) _L_FLAG((tty),XCASE) +#define L_ECHO(tty) _L_FLAG((tty),ECHO) +#define L_ECHOE(tty) _L_FLAG((tty),ECHOE) +#define L_ECHOK(tty) _L_FLAG((tty),ECHOK) +#define L_ECHONL(tty) _L_FLAG((tty),ECHONL) +#define L_NOFLSH(tty) _L_FLAG((tty),NOFLSH) +#define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP) +#define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL) +#define L_ECHOPRT(tty) _L_FLAG((tty),ECHOPRT) +#define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE) +#define L_FLUSHO(tty) _L_FLAG((tty),FLUSHO) +#define L_PENDIN(tty) _L_FLAG((tty),PENDIN) +#define L_IEXTEN(tty) _L_FLAG((tty),IEXTEN) + +/* + * Where all of the state associated with a tty is kept while the tty + * is open. Since the termios state should be kept even if the tty + * has been closed --- for things like the baud rate, etc --- it is + * not stored here, but rather a pointer to the real state is stored + * here. Possible the winsize structure should have the same + * treatment, but (1) the default 80x24 is usually right and (2) it's + * most often used by a windowing system, which will set the correct + * size each time the window is created or resized anyway. + * IMPORTANT: since this structure is dynamically allocated, it must + * be no larger than 4096 bytes. Changing TTY_BUF_SIZE will change + * the size of this structure, and it needs to be done with care. + * - TYT, 9/14/92 + */ +struct tty_struct { + int magic; + struct tty_driver driver; + struct tty_ldisc ldisc; + struct termios *termios, *termios_locked; + int pgrp; + int session; + dev_t device; + int flags; + int count; + struct winsize winsize; + unsigned char stopped:1, hw_stopped:1, packet:1; + unsigned char ctrl_status; + + struct tty_struct *link; + struct fasync_struct *fasync; + struct tty_flip_buffer flip; + int max_flip_cnt; + struct wait_queue *write_wait; + struct wait_queue *read_wait; + void *disc_data; + void *driver_data; + +#define N_TTY_BUF_SIZE 4096 + + /* + * The following is data for the N_TTY line discipline. For + * historical reasons, this is included in the tty structure. + */ + unsigned int column; + unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1; + unsigned short minimum_to_wake; + unsigned overrun_time; + int num_overrun; + int process_char_map[256/32]; + char *read_buf; + int read_head; + int read_tail; + int read_cnt; + int read_flags[N_TTY_BUF_SIZE/32]; + int canon_data; + unsigned long canon_head; + unsigned int canon_column; +}; + +/* tty magic number */ +#define TTY_MAGIC 0x5401 + +/* + * These bits are used in the flags field of the tty structure. + * + * So that interrupts won't be able to mess up the queues, + * copy_to_cooked must be atomic with respect to itself, as must + * tty->write. Thus, you must use the inline functions set_bit() and + * clear_bit() to make things atomic. + */ +#define TTY_THROTTLED 0 +#define TTY_IO_ERROR 1 +#define TTY_SLAVE_CLOSED 2 +#define TTY_EXCLUSIVE 3 +#define TTY_DEBUG 4 +#define TTY_DO_WRITE_WAKEUP 5 +#define TTY_PUSH 6 + +#define TTY_WRITE_FLUSH(tty) tty_write_flush((tty)) + +extern void tty_write_flush(struct tty_struct *); + +extern struct termios tty_std_termios; +extern struct tty_struct * redirect; +extern struct tty_ldisc ldiscs[]; +extern int fg_console; +extern struct wait_queue * keypress_wait; + +/* intr=^C quit=^| erase=del kill=^U + eof=^D vtime=\0 vmin=\1 sxtc=\0 + start=^Q stop=^S susp=^Z eol=\0 + reprint=^R discard=^U werase=^W lnext=^V + eol2=\0 +*/ +#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0" + +extern long rs_init(long); +extern long lp_init(long); +extern long con_init(long); +extern long pty_init(long); +extern long tty_init(long); + +extern int tty_paranoia_check(struct tty_struct *tty, dev_t device, + const char *routine); +extern char *_tty_name(struct tty_struct *tty, char *buf); +extern char *tty_name(struct tty_struct *tty); +extern void wait_until_sent(struct tty_struct * tty, int timeout); +extern int tty_check_change(struct tty_struct * tty); +extern void stop_tty(struct tty_struct * tty); +extern void start_tty(struct tty_struct * tty); +extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc); +extern int tty_register_driver(struct tty_driver *driver); +extern int tty_unregister_driver(struct tty_driver *driver); +extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp, + int buflen); + +extern int is_orphaned_pgrp(int pgrp); +extern int is_ignored(int sig); +extern int tty_signal(int sig, struct tty_struct *tty); +extern void tty_hangup(struct tty_struct * tty); +extern void tty_vhangup(struct tty_struct * tty); +extern void tty_unhangup(struct file *filp); +extern int tty_hung_up_p(struct file * filp); +extern void do_SAK(struct tty_struct *tty); +extern void disassociate_ctty(int priv); + +/* n_tty.c */ +extern struct tty_ldisc tty_ldisc_N_TTY; + +/* tty_ioctl.c */ +extern int n_tty_ioctl(struct tty_struct * tty, struct file * file, + unsigned int cmd, unsigned long arg); + +/* serial.c */ + +extern int rs_open(struct tty_struct * tty, struct file * filp); + +/* pty.c */ + +extern int pty_open(struct tty_struct * tty, struct file * filp); + +/* console.c */ + +extern int con_open(struct tty_struct * tty, struct file * filp); +extern void update_screen(int new_console); +extern void blank_screen(void); +extern void unblank_screen(void); + +/* vt.c */ + +extern int vt_ioctl(struct tty_struct *tty, struct file * file, + unsigned int cmd, unsigned long arg); + +#endif /* __KERNEL__ */ +#endif |