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historical/gems-kernel.git/source/THIRDPARTY/linux-old/include/linux/tty.h

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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.
*/
#include <linux/termios.h>
#include <asm/system.h>
#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 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;
unsigned short close_delay;
char reserved_char[2];
int hub6;
int reserved[5];
};
/*
* 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 getty on hangups and closes
on the callout port */
#define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */
#define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */
#define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
#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_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
#define ASYNC_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */
#define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
#define ASYNC_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */
#define ASYNC_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */
#define ASYNC_FLAGS 0x0FFF /* Possible legal async flags */
#define ASYNC_USR_MASK 0x0430 /* Legal flags that non-privileged
* users can set or reset */
/* 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 ASYNC_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */
#define ASYNC_CLOSING 0x08000000 /* Serial port is closing */
#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(unsigned 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 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_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, hw_stopped:1, packet:1, lnext:1;
unsigned char char_error:3;
unsigned char erasing:1;
unsigned char ctrl_status;
short line;
int disc;
int flags;
int count;
unsigned int column;
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 long arg);
void (*throttle)(struct tty_struct * tty, int status);
void (*set_termios)(struct tty_struct *tty, struct termios * old);
void (*stop)(struct tty_struct *tty);
void (*start)(struct tty_struct *tty);
void (*hangup)(struct tty_struct *tty);
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];
int secondary_flags[TTY_BUF_SIZE/32];
int canon_data;
unsigned long canon_head;
unsigned int canon_column;
struct tty_queue read_q;
struct tty_queue write_q;
struct tty_queue secondary;
void *disc_data;
};
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,
unsigned char * buf, unsigned int nr);
int (*write)(struct tty_struct * tty, struct file * file,
unsigned char * buf, unsigned int nr);
int (*ioctl)(struct tty_struct * tty, struct file * file,
unsigned int cmd, unsigned long arg);
int (*select)(struct tty_struct * tty, struct inode * inode,
struct file * file, int sel_type,
struct select_table_struct *wait);
/*
* 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_SQ_THROTTLED 2
#define TTY_RQ_THROTTLED 3
#define TTY_IO_ERROR 4
#define TTY_SLAVE_CLOSED 5
#define TTY_EXCLUSIVE 6
/*
* 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_OVERRUN 4
#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 *);
/* Number of chars that must be available in a write queue before
the queue is awakened. */
#define WAKEUP_CHARS (3*TTY_BUF_SIZE/4)
extern struct tty_struct *tty_table[];
extern struct termios *tty_termios[];
extern struct termios *termios_locked[];
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=del 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\177\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 int check_change(struct tty_struct * tty, int channel);
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_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
int buflen);
extern int tty_write_data(struct tty_struct *tty, char *bufp, int buflen,
void (*callback)(void * data), void * callarg);
extern int tty_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
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);
/* 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 long arg);
#endif
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