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- #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/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 17
- /* line disciplines */
- #define N_TTY 0
- #define N_SLIP 1
- #define N_MOUSE 2
- #define N_PPP 3
- #define N_STRIP 4
- #define N_AX25 5
- #define N_X25 6 /* X.25 async */
- #define N_6PACK 7
- #define N_MASC 8 /* Reserved for Mobitex module <kaz@cafe.net> */
- #define N_R3964 9 /* Reserved for Simatic R3964 module */
- #define N_PROFIBUS_FDL 10 /* Reserved for Profibus <Dave@mvhi.com> */
- #define N_IRDA 11 /* Linux IrDa - http://irda.sourceforge.net/ */
- #define N_SMSBLOCK 12 /* SMS block mode - for talking to GSM data */
- /* cards about SMS messages */
- #define N_HDLC 13 /* synchronous HDLC */
- #define N_SYNC_PPP 14 /* synchronous PPP */
- #define N_HCI 15 /* Bluetooth HCI UART */
- #define N_GIGASET_M101 16 /* Siemens Gigaset M101 serial DECT adapter */
- /*
- * 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 delayed_work 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 */
- int memory_used; /* Buffer space used excluding free queue */
- };
- /*
- * 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 mutex termios_mutex;
- struct ktermios *termios, *termios_locked;
- char name[64];
- struct pid *pgrp;
- struct pid *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 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 ktermios 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 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_current_pgrp_orphaned(void);
- 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 __do_SAK(struct tty_struct *tty);
- extern void disassociate_ctty(int priv);
- extern void tty_flip_buffer_push(struct tty_struct *tty);
- extern speed_t tty_get_baud_rate(struct tty_struct *tty);
- extern speed_t tty_termios_baud_rate(struct ktermios *termios);
- extern speed_t tty_termios_input_baud_rate(struct ktermios *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 int tty_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg);
- extern dev_t tty_devnum(struct tty_struct *tty);
- extern void proc_clear_tty(struct task_struct *p);
- extern void proc_set_tty(struct task_struct *tsk, struct tty_struct *tty);
- extern struct tty_struct *get_current_tty(void);
- 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);
- #endif /* __KERNEL__ */
- #endif
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