| #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_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */ |
| #define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */ |
| #define NR_LDISCS 19 |
| |
| /* 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 */ |
| #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 */ |
| #define N_SLCAN 17 /* Serial / USB serial CAN Adaptors */ |
| #define N_PPS 18 /* Pulse per Second */ |
| |
| /* |
| * 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' |
| |
| 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; |
| 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 */ |
| }; |
| /* |
| * 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; |
| struct signal_struct; |
| |
| /* |
| * Port level information. Each device keeps its own port level information |
| * so provide a common structure for those ports wanting to use common support |
| * routines. |
| * |
| * The tty port has a different lifetime to the tty so must be kept apart. |
| * In addition be careful as tty -> port mappings are valid for the life |
| * of the tty object but in many cases port -> tty mappings are valid only |
| * until a hangup so don't use the wrong path. |
| */ |
| |
| struct tty_port { |
| struct tty_struct *tty; /* Back pointer */ |
| int blocked_open; /* Waiting to open */ |
| int count; /* Usage count */ |
| wait_queue_head_t open_wait; /* Open waiters */ |
| wait_queue_head_t close_wait; /* Close waiters */ |
| unsigned long flags; /* TTY flags ASY_*/ |
| struct mutex mutex; /* Locking */ |
| unsigned char *xmit_buf; /* Optional buffer */ |
| int close_delay; /* Close port delay */ |
| int closing_wait; /* Delay for output */ |
| }; |
| |
| /* |
| * 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_operations; |
| |
| struct tty_struct { |
| int magic; |
| struct tty_driver *driver; |
| const struct tty_operations *ops; |
| int index; |
| /* The ldisc objects are protected by tty_ldisc_lock at the moment */ |
| struct tty_ldisc ldisc; |
| struct mutex termios_mutex; |
| spinlock_t ctrl_lock; |
| /* Termios values are protected by the termios mutex */ |
| struct ktermios *termios, *termios_locked; |
| char name[64]; |
| struct pid *pgrp; /* Protected by ctrl lock */ |
| struct pid *session; |
| unsigned long flags; |
| int count; |
| struct winsize winsize; /* termios mutex */ |
| unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1; |
| unsigned char low_latency:1, warned:1; |
| unsigned char ctrl_status; /* ctrl_lock */ |
| unsigned int receive_room; /* Bytes free for queue */ |
| |
| struct tty_struct *link; |
| struct fasync_struct *fasync; |
| struct tty_bufhead buf; /* Locked internally */ |
| 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. |
| * Mostly locked by the BKL. |
| */ |
| 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; |
| struct tty_port *port; |
| }; |
| |
| /* 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 /* Cause 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_FLUSHING 19 /* Flushing to ldisc in progress */ |
| #define TTY_FLUSHPENDING 20 /* Queued buffer flush pending */ |
| |
| #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_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 tty_put_char(struct tty_struct *tty, unsigned char c); |
| extern int tty_chars_in_buffer(struct tty_struct *tty); |
| extern int tty_write_room(struct tty_struct *tty); |
| extern void tty_driver_flush_buffer(struct tty_struct *tty); |
| extern void tty_throttle(struct tty_struct *tty); |
| extern void tty_unthrottle(struct tty_struct *tty); |
| extern int tty_do_resize(struct tty_struct *tty, struct tty_struct *real_tty, |
| struct winsize *ws); |
| |
| extern int is_current_pgrp_orphaned(void); |
| extern struct pid *tty_get_pgrp(struct tty_struct *tty); |
| 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 no_tty(void); |
| extern void tty_flip_buffer_push(struct tty_struct *tty); |
| extern void tty_buffer_free_all(struct tty_struct *tty); |
| extern void tty_buffer_flush(struct tty_struct *tty); |
| extern void tty_buffer_init(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 void tty_termios_encode_baud_rate(struct ktermios *termios, |
| speed_t ibaud, speed_t obaud); |
| extern void tty_encode_baud_rate(struct tty_struct *tty, |
| speed_t ibaud, speed_t obaud); |
| extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old); |
| extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b); |
| |
| 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 const struct file_operations tty_ldiscs_proc_fops; |
| |
| extern void tty_wakeup(struct tty_struct *tty); |
| extern void tty_ldisc_flush(struct tty_struct *tty); |
| |
| extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
| extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file, |
| unsigned int cmd, unsigned long arg); |
| extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg); |
| extern dev_t tty_devnum(struct tty_struct *tty); |
| extern void proc_clear_tty(struct task_struct *p); |
| extern struct tty_struct *get_current_tty(void); |
| |
| extern struct mutex tty_mutex; |
| |
| extern void tty_write_unlock(struct tty_struct *tty); |
| extern int tty_write_lock(struct tty_struct *tty, int ndelay); |
| #define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock)) |
| |
| extern void tty_port_init(struct tty_port *port); |
| extern int tty_port_alloc_xmit_buf(struct tty_port *port); |
| extern void tty_port_free_xmit_buf(struct tty_port *port); |
| |
| extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc); |
| extern int tty_unregister_ldisc(int disc); |
| extern int tty_set_ldisc(struct tty_struct *tty, int ldisc); |
| extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty); |
| extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty); |
| extern void tty_ldisc_init(struct tty_struct *tty); |
| extern void tty_ldisc_begin(void); |
| /* This last one is just for the tty layer internals and shouldn't be used elsewhere */ |
| extern void tty_ldisc_enable(struct tty_struct *tty); |
| |
| |
| /* n_tty.c */ |
| extern struct tty_ldisc_ops tty_ldisc_N_TTY; |
| |
| /* tty_audit.c */ |
| #ifdef CONFIG_AUDIT |
| extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data, |
| size_t size); |
| extern void tty_audit_exit(void); |
| extern void tty_audit_fork(struct signal_struct *sig); |
| extern void tty_audit_push(struct tty_struct *tty); |
| extern void tty_audit_push_task(struct task_struct *tsk, |
| uid_t loginuid, u32 sessionid); |
| #else |
| static inline void tty_audit_add_data(struct tty_struct *tty, |
| unsigned char *data, size_t size) |
| { |
| } |
| static inline void tty_audit_exit(void) |
| { |
| } |
| static inline void tty_audit_fork(struct signal_struct *sig) |
| { |
| } |
| static inline void tty_audit_push(struct tty_struct *tty) |
| { |
| } |
| static inline void tty_audit_push_task(struct task_struct *tsk, |
| uid_t loginuid, u32 sessionid) |
| { |
| } |
| #endif |
| |
| /* 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 |