| #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/major.h> |
| #include <linux/termios.h> |
| #include <linux/workqueue.h> |
| #include <linux/tty_driver.h> |
| #include <linux/tty_ldisc.h> |
| #include <linux/screen_info.h> |
| #include <linux/mutex.h> |
| |
| #include <asm/system.h> |
| |
| |
| /* |
| * (Note: the *_driver.minor_start values 1, 64, 128, 192 are |
| * hardcoded at present.) |
| */ |
| #define NR_PTYS CONFIG_LEGACY_PTY_COUNT /* Number of legacy ptys */ |
| #define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */ |
| #define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */ |
| #define NR_LDISCS 16 |
| |
| /* |
| * 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_buffer { |
| struct tty_buffer *next; |
| char *char_buf_ptr; |
| unsigned char *flag_buf_ptr; |
| int used; |
| int size; |
| int commit; |
| int read; |
| /* Data points here */ |
| unsigned long data[0]; |
| }; |
| |
| struct tty_bufhead { |
| struct work_struct work; |
| struct semaphore pty_sem; |
| spinlock_t lock; |
| struct tty_buffer *head; /* Queue head */ |
| struct tty_buffer *tail; /* Active buffer */ |
| struct tty_buffer *free; /* Free queue head */ |
| }; |
| /* |
| * The pty uses char_buf and flag_buf as a contiguous buffer |
| */ |
| #define PTY_BUF_SIZE 4*TTY_FLIPBUF_SIZE |
| |
| /* |
| * 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 I_IUTF8(tty) _I_FLAG((tty),IUTF8) |
| |
| #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) |
| |
| struct device; |
| /* |
| * 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. |
| * - TYT, 9/14/92 |
| */ |
| struct tty_struct { |
| int magic; |
| struct tty_driver *driver; |
| int index; |
| struct tty_ldisc ldisc; |
| struct semaphore termios_sem; |
| struct termios *termios, *termios_locked; |
| char name[64]; |
| int pgrp; |
| int session; |
| unsigned long flags; |
| int count; |
| struct winsize winsize; |
| unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1; |
| unsigned char low_latency:1, warned:1; |
| unsigned char ctrl_status; |
| unsigned int receive_room; /* Bytes free for queue */ |
| |
| struct tty_struct *link; |
| struct fasync_struct *fasync; |
| struct tty_bufhead buf; |
| int max_flip_cnt; |
| int alt_speed; /* For magic substitution of 38400 bps */ |
| wait_queue_head_t write_wait; |
| wait_queue_head_t read_wait; |
| struct work_struct hangup_work; |
| void *disc_data; |
| void *driver_data; |
| struct list_head tty_files; |
| |
| #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 char closing:1; |
| unsigned short minimum_to_wake; |
| unsigned long overrun_time; |
| int num_overrun; |
| unsigned long process_char_map[256/(8*sizeof(unsigned long))]; |
| char *read_buf; |
| int read_head; |
| int read_tail; |
| int read_cnt; |
| unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))]; |
| int canon_data; |
| unsigned long canon_head; |
| unsigned int canon_column; |
| struct mutex atomic_read_lock; |
| struct mutex atomic_write_lock; |
| unsigned char *write_buf; |
| int write_cnt; |
| spinlock_t read_lock; |
| /* If the tty has a pending do_SAK, queue it here - akpm */ |
| struct work_struct SAK_work; |
| }; |
| |
| /* 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 /* Call unthrottle() at threshold min */ |
| #define TTY_IO_ERROR 1 /* Canse an I/O error (may be no ldisc too) */ |
| #define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */ |
| #define TTY_EXCLUSIVE 3 /* Exclusive open mode */ |
| #define TTY_DEBUG 4 /* Debugging */ |
| #define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */ |
| #define TTY_PUSH 6 /* n_tty private */ |
| #define TTY_CLOSING 7 /* ->close() in progress */ |
| #define TTY_LDISC 9 /* Line discipline attached */ |
| #define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */ |
| #define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */ |
| #define TTY_PTY_LOCK 16 /* pty private */ |
| #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */ |
| #define TTY_HUPPED 18 /* Post driver->hangup() */ |
| |
| #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty)) |
| |
| extern void tty_write_flush(struct tty_struct *); |
| |
| extern struct termios tty_std_termios; |
| |
| extern int kmsg_redirect; |
| |
| extern void console_init(void); |
| extern int vcs_init(void); |
| |
| extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode, |
| const char *routine); |
| extern char *tty_name(struct tty_struct *tty, char *buf); |
| extern void tty_wait_until_sent(struct tty_struct * tty, long 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_unregister_ldisc(int disc); |
| extern int tty_register_driver(struct tty_driver *driver); |
| extern int tty_unregister_driver(struct tty_driver *driver); |
| extern struct class_device *tty_register_device(struct tty_driver *driver, |
| unsigned index, |
| struct device *dev); |
| extern void tty_unregister_device(struct tty_driver *driver, unsigned index); |
| extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp, |
| int buflen); |
| extern void tty_write_message(struct tty_struct *tty, char *msg); |
| |
| 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); |
| extern void tty_flip_buffer_push(struct tty_struct *tty); |
| extern int tty_get_baud_rate(struct tty_struct *tty); |
| extern int tty_termios_baud_rate(struct termios *termios); |
| |
| extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *); |
| extern void tty_ldisc_deref(struct tty_ldisc *); |
| extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *); |
| |
| extern struct tty_ldisc *tty_ldisc_get(int); |
| extern void tty_ldisc_put(int); |
| |
| extern void tty_wakeup(struct tty_struct *tty); |
| extern void tty_ldisc_flush(struct tty_struct *tty); |
| |
| extern struct mutex tty_mutex; |
| |
| /* 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 void serial_console_init(void); |
| |
| /* pcxx.c */ |
| |
| extern int pcxe_open(struct tty_struct *tty, struct file *filp); |
| |
| /* printk.c */ |
| |
| extern void console_print(const char *); |
| |
| /* vt.c */ |
| |
| extern int vt_ioctl(struct tty_struct *tty, struct file * file, |
| unsigned int cmd, unsigned long arg); |
| |
| static inline dev_t tty_devnum(struct tty_struct *tty) |
| { |
| return MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index; |
| } |
| |
| #endif /* __KERNEL__ */ |
| #endif |