#ifndef _LINUX_TTY_H #define _LINUX_TTY_H /* * 'tty.h' defines some structures used by tty_io.c and some defines. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file README.legal in the main directory of this archive * for more details. */ #include #include #define NR_CONSOLES 8 #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 ahs no character etc) */ #define __DISABLED_CHAR '\0' /* * See comment for the tty_struct structure before changing * TTY_BUF_SIZE. Actually, there should be different sized tty_queue * structures for different purposes. 1024 bytes for the transmit * queue is way overkill. TYT, 9/14/92 */ #define TTY_BUF_SIZE 1024 /* Must be a power of 2 */ struct tty_queue { unsigned long data; unsigned long head; unsigned long tail; struct wait_queue * proc_list; unsigned char buf[TTY_BUF_SIZE]; }; struct serial_struct { int type; int line; int port; int irq; int flags; int xmit_fifo_size; int custom_divisor; int baud_base; char close_delay; char reserved_char[3]; int reserved[6]; }; /* * These are the supported serial types. */ #define PORT_UNKNOWN 0 #define PORT_8250 1 #define PORT_16450 2 #define PORT_16550 3 #define PORT_16550A 4 #define PORT_MAX 4 /* * Definitions for async_struct (and serial_struct) flags field */ #define ASYNC_HUP_NOTIFY 0x0001 /* Notify blocked open on hangups */ #define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */ #define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */ #define ASYNC_SKIP_TEST 0x0008 /* Skip UART test on bootup */ #define ASYNC_SPD_MASK 0x0030 #define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */ #define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */ #define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */ #define ASYNC_FLAGS 0x0037 /* Possible legal async flags */ /* Internal flags used only by kernel/chr_drv/serial.c */ #define ASYNC_INITIALIZED 0x80000000 /* Serial port was initialized */ #define ASYNC_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */ #define ASYNC_NORMAL_ACTIVE 0x20000000 /* Normal device is active */ #define IS_A_CONSOLE(min) (((min) & 0xC0) == 0x00) #define IS_A_SERIAL(min) (((min) & 0xC0) == 0x40) #define IS_A_PTY(min) ((min) & 0x80) #define IS_A_PTY_MASTER(min) (((min) & 0xC0) == 0x80) #define IS_A_PTY_SLAVE(min) (((min) & 0xC0) == 0xC0) #define PTY_OTHER(min) ((min) ^ 0x40) #define SL_TO_DEV(line) ((line) | 0x40) #define DEV_TO_SL(min) ((min) & 0x3F) #define INC(a) ((a) = ((a)+1) & (TTY_BUF_SIZE-1)) #define DEC(a) ((a) = ((a)-1) & (TTY_BUF_SIZE-1)) #define EMPTY(a) ((a)->head == (a)->tail) #define LEFT(a) (((a)->tail-(a)->head-1)&(TTY_BUF_SIZE-1)) #define LAST(a) ((a)->buf[(TTY_BUF_SIZE-1)&((a)->head-1)]) #define FULL(a) (!LEFT(a)) #define CHARS(a) (((a)->head-(a)->tail)&(TTY_BUF_SIZE-1)) extern void put_tty_queue(char c, struct tty_queue * queue); extern int get_tty_queue(struct tty_queue * queue); #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 START_CHAR(tty) ((tty)->termios->c_cc[VSTART]) #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP]) #define SUSPEND_CHAR(tty) ((tty)->termios->c_cc[VSUSP]) #define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT]) #define _L_FLAG(tty,f) ((tty)->termios->c_lflag & f) #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_CANON(tty) _L_FLAG((tty),ICANON) #define L_ISIG(tty) _L_FLAG((tty),ISIG) #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_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL) #define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE) #define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP) #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_UCLC(tty) _I_FLAG((tty),IUCLC) #define I_NLCR(tty) _I_FLAG((tty),INLCR) #define I_CRNL(tty) _I_FLAG((tty),ICRNL) #define I_NOCR(tty) _I_FLAG((tty),IGNCR) #define I_IXON(tty) _I_FLAG((tty),IXON) #define I_IXANY(tty) _I_FLAG((tty),IXANY) #define I_STRP(tty) _I_FLAG((tty),ISTRIP) #define O_POST(tty) _O_FLAG((tty),OPOST) #define O_NLCR(tty) _O_FLAG((tty),ONLCR) #define O_CRNL(tty) _O_FLAG((tty),OCRNL) #define O_NLRET(tty) _O_FLAG((tty),ONLRET) #define O_LCUC(tty) _O_FLAG((tty),OLCUC) #define C_LOCAL(tty) _C_FLAG((tty),CLOCAL) #define C_RTSCTS(tty) _C_FLAG((tty),CRTSCTS) #define C_SPEED(tty) ((tty)->termios->c_cflag & CBAUD) #define C_HUP(tty) (C_SPEED((tty)) == B0) /* * 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 { struct termios *termios; int pgrp; int session; unsigned char stopped:1, status_changed:1, packet:1, lnext:1; unsigned char char_error:2; unsigned char ctrl_status; short line; int disc; int flags; int count; struct winsize winsize; int (*open)(struct tty_struct * tty, struct file * filp); void (*close)(struct tty_struct * tty, struct file * filp); void (*write)(struct tty_struct * tty); int (*ioctl)(struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned int arg); void (*throttle)(struct tty_struct * tty, int status); void (*set_termios)(struct tty_struct *tty, struct termios * old); struct tty_struct *link; unsigned char *write_data_ptr; int write_data_cnt; void (*write_data_callback)(void * data); void * write_data_arg; int readq_flags[TTY_BUF_SIZE/32]; struct tty_queue read_q; struct tty_queue write_q; struct tty_queue secondary; }; struct tty_ldisc { int flags; /* * The following routines are called from above. */ int (*open)(struct tty_struct *); void (*close)(struct tty_struct *); int (*read)(struct tty_struct * tty, struct file * file, char * buf, int nr); int (*write)(struct tty_struct * tty, struct file * file, char * buf, int nr); int (*ioctl)(struct tty_struct * tty, struct file * file, unsigned int cmd, unsigned int arg); /* * The following routines are called from below. */ void (*handler)(struct tty_struct *); }; #define LDISC_FLAG_DEFINED 0x00000001 /* * These are the different types of thottle status which can be sent * to the low-level tty driver. The tty_io.c layer is responsible for * notifying the low-level tty driver of the following conditions: * secondary queue full, secondary queue available, and read queue * available. The low-level driver must send the read queue full * command to itself, if it is interested in that condition. * * Note that the low-level tty driver may elect to ignore one or both * of these conditions; normally, however, it will use ^S/^Q or some * sort of hardware flow control to regulate the input to try to avoid * overflow. While the low-level driver is responsible for all * receiving flow control, note that the ^S/^Q handling (but not * hardware flow control) is handled by the upper layer, in * copy_to_cooked. */ #define TTY_THROTTLE_SQ_FULL 1 #define TTY_THROTTLE_SQ_AVAIL 2 #define TTY_THROTTLE_RQ_FULL 3 #define TTY_THROTTLE_RQ_AVAIL 4 /* * This defines the low- and high-watermarks for the various conditions. * Again, the low-level driver is free to ignore any of these, and has * to implement RQ_THREHOLD_LW for itself if it wants it. */ #define SQ_THRESHOLD_LW 16 #define SQ_THRESHOLD_HW 768 #define RQ_THRESHOLD_LW 16 #define RQ_THRESHOLD_HW 768 /* * 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 repect to itself, as must * tty->write. Thus, you must use the inline functions set_bit() and * clear_bit() to make things atomic. */ #define TTY_WRITE_BUSY 0 #define TTY_READ_BUSY 1 #define TTY_CR_PENDING 2 #define TTY_SQ_THROTTLED 3 #define TTY_RQ_THROTTLED 4 #define TTY_IO_ERROR 5 /* * When a break, frame error, or parity error happens, these codes are * stuffed into the read queue, and the relevant bit in readq_flag bit * array is set. */ #define TTY_BREAK 1 #define TTY_FRAME 2 #define TTY_PARITY 3 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty)) #define TTY_READ_FLUSH(tty) tty_read_flush((tty)) extern void tty_write_flush(struct tty_struct *); extern void tty_read_flush(struct tty_struct *); extern struct tty_struct *tty_table[]; extern int tty_check_write[]; extern struct tty_struct * redirect; extern struct tty_ldisc ldiscs[]; extern int fg_console; extern unsigned long video_num_columns; extern unsigned long video_num_lines; extern struct wait_queue * keypress_wait; #define TTY_TABLE_IDX(nr) ((nr) ? (nr) : (fg_console+1)) #define TTY_TABLE(nr) (tty_table[TTY_TABLE_IDX(nr)]) /* intr=^C quit=^| erase=^H 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\010\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 tty_init(long); extern void flush_input(struct tty_struct * tty); extern void flush_output(struct tty_struct * tty); extern void wait_until_sent(struct tty_struct * tty); extern void copy_to_cooked(struct tty_struct * tty); extern int tty_register_ldisc(int disc, struct tty_ldisc *new); extern int tty_ioctl(struct inode *, struct file *, unsigned int, unsigned int); extern int is_orphaned_pgrp(int pgrp); extern int is_ignored(int sig); extern int tty_signal(int sig, struct tty_struct *tty); extern int kill_pg(int pgrp, int sig, int priv); extern int kill_sl(int sess, int sig, int priv); extern void tty_hangup(struct tty_struct * tty); extern void tty_vhangup(struct tty_struct * tty); extern void tty_unhangup(struct file *filp); extern void do_SAK(struct tty_struct *tty); /* tty write functions */ extern void rs_write(struct tty_struct * tty); extern void con_write(struct tty_struct * tty); /* 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 int arg); #endif