#ifndef _LINUX_TTY_H #define _LINUX_TTY_H /* * 'tty.h' defines some structures used by tty_io.c and some defines. */ /* * These constants are also useful for user-level apps (e.g., VC * resizing). */ #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) */ #ifdef __KERNEL__ #include #include #include #include #include #include #include #include #include /* * 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 NR_PTYS 256 /* ptys/major */ #define NR_LDISCS 16 /* * Unix98 PTY's can be defined as any multiple of NR_PTYS up to * UNIX98_PTY_MAJOR_COUNT; this section defines what we need from the * config options */ #ifdef CONFIG_UNIX98_PTYS # define UNIX98_NR_MAJORS ((CONFIG_UNIX98_PTY_COUNT+NR_PTYS-1)/NR_PTYS) # if UNIX98_NR_MAJORS <= 0 # undef CONFIG_UNIX98_PTYS # elif UNIX98_NR_MAJORS > UNIX98_PTY_MAJOR_COUNT # error Too many Unix98 ptys defined # undef UNIX98_NR_MAJORS # define UNIX98_NR_MAJORS UNIX98_PTY_MAJOR_COUNT # endif #endif /* * These are set up by the setup-routine at boot-time: */ struct screen_info { unsigned char orig_x; /* 0x00 */ unsigned char orig_y; /* 0x01 */ unsigned short dontuse1; /* 0x02 -- EXT_MEM_K sits here */ unsigned short orig_video_page; /* 0x04 */ unsigned char orig_video_mode; /* 0x06 */ unsigned char orig_video_cols; /* 0x07 */ unsigned short unused2; /* 0x08 */ unsigned short orig_video_ega_bx; /* 0x0a */ unsigned short unused3; /* 0x0c */ unsigned char orig_video_lines; /* 0x0e */ unsigned char orig_video_isVGA; /* 0x0f */ unsigned short orig_video_points; /* 0x10 */ /* VESA graphic mode -- linear frame buffer */ unsigned short lfb_width; /* 0x12 */ unsigned short lfb_height; /* 0x14 */ unsigned short lfb_depth; /* 0x16 */ unsigned long lfb_base; /* 0x18 */ unsigned long lfb_size; /* 0x1c */ unsigned short dontuse2, dontuse3; /* 0x20 -- CL_MAGIC and CL_OFFSET here */ unsigned short lfb_linelength; /* 0x24 */ unsigned char red_size; /* 0x26 */ unsigned char red_pos; /* 0x27 */ unsigned char green_size; /* 0x28 */ unsigned char green_pos; /* 0x29 */ unsigned char blue_size; /* 0x2a */ unsigned char blue_pos; /* 0x2b */ unsigned char rsvd_size; /* 0x2c */ unsigned char rsvd_pos; /* 0x2d */ unsigned short vesapm_seg; /* 0x2e */ unsigned short vesapm_off; /* 0x30 */ unsigned short pages; /* 0x32 */ /* 0x34 -- 0x3f reserved for future expansion */ }; extern struct screen_info screen_info; #define ORIG_X (screen_info.orig_x) #define ORIG_Y (screen_info.orig_y) #define ORIG_VIDEO_MODE (screen_info.orig_video_mode) #define ORIG_VIDEO_COLS (screen_info.orig_video_cols) #define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx) #define ORIG_VIDEO_LINES (screen_info.orig_video_lines) #define ORIG_VIDEO_ISVGA (screen_info.orig_video_isVGA) #define ORIG_VIDEO_POINTS (screen_info.orig_video_points) #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 in Color Mode */ #define VIDEO_TYPE_VGAC 0x22 /* VGA+ in Color Mode */ #define VIDEO_TYPE_VLFB 0x23 /* VESA VGA in graphic mode */ #define VIDEO_TYPE_TGAC 0x40 /* DEC TGA */ #define VIDEO_TYPE_SUN 0x50 /* Sun frame buffer. */ #define VIDEO_TYPE_SUNPCI 0x51 /* Sun PCI based frame buffer. */ #define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */ #define VIDEO_TYPE_SGI 0x70 /* Various SGI graphics hardware */ #define VIDEO_TYPE_MIPS_G364 0x71 /* MIPS Magnum 4000 G364 video */ /* * 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; struct semaphore pty_sem; char *char_buf_ptr; unsigned char *flag_buf_ptr; int count; int buf_num; unsigned char char_buf[2*TTY_FLIPBUF_SIZE]; char flag_buf[2*TTY_FLIPBUF_SIZE]; unsigned char slop[4]; /* N.B. bug overwrites buffer by 1 */ }; /* * 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 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_FLIPBUF_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; kdev_t device; 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; struct tty_struct *link; struct fasync_struct *fasync; struct tty_flip_buffer flip; int max_flip_cnt; int alt_speed; /* For magic substitution of 38400 bps */ struct wait_queue *write_wait; struct wait_queue *read_wait; struct tq_struct tq_hangup; 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 char closing:1; unsigned short minimum_to_wake; unsigned 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 semaphore atomic_read; }; /* 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_OTHER_CLOSED 2 #define TTY_EXCLUSIVE 3 #define TTY_DEBUG 4 #define TTY_DO_WRITE_WAKEUP 5 #define TTY_PUSH 6 #define TTY_CLOSING 7 #define TTY_DONT_FLIP 8 #define TTY_HW_COOK_OUT 14 #define TTY_HW_COOK_IN 15 #define TTY_PTY_LOCK 16 #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, last_console, want_console; extern int kmsg_redirect; extern unsigned long con_init(unsigned long); extern int rs_init(void); extern int lp_init(void); extern int pty_init(void); extern int tty_init(void); extern int ip2_init(void); extern int pcxe_init(void); extern int pc_init(void); extern int vcs_init(void); extern int rp_init(void); extern int cy_init(void); extern int stl_init(void); extern int stli_init(void); extern int riscom8_init(void); extern int specialix_init(void); extern int espserial_init(void); extern int macserial_init(void); extern int tty_paranoia_check(struct tty_struct *tty, kdev_t device, 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_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 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); /* 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 long serial_console_init(long kmem_start, long kmem_end); /* 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