[deliverable/linux.git] / include / linux / tty.h

#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 <linux/config.h>
#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 <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		16

/*
 * These are set up by the setup-routine at boot-time:
 */

struct screen_info {
	u8  orig_x;		/* 0x00 */
	u8  orig_y;		/* 0x01 */
	u16 dontuse1;		/* 0x02 -- EXT_MEM_K sits here */
	u16 orig_video_page;	/* 0x04 */
	u8  orig_video_mode;	/* 0x06 */
	u8  orig_video_cols;	/* 0x07 */
	u16 unused2;		/* 0x08 */
	u16 orig_video_ega_bx;	/* 0x0a */
	u16 unused3;		/* 0x0c */
	u8  orig_video_lines;	/* 0x0e */
	u8  orig_video_isVGA;	/* 0x0f */
	u16 orig_video_points;	/* 0x10 */

	/* VESA graphic mode -- linear frame buffer */
	u16 lfb_width;		/* 0x12 */
	u16 lfb_height;		/* 0x14 */
	u16 lfb_depth;		/* 0x16 */
	u32 lfb_base;		/* 0x18 */
	u32 lfb_size;		/* 0x1c */
	u16 dontuse2, dontuse3;	/* 0x20 -- CL_MAGIC and CL_OFFSET here */
	u16 lfb_linelength;	/* 0x24 */
	u8  red_size;		/* 0x26 */
	u8  red_pos;		/* 0x27 */
	u8  green_size;		/* 0x28 */
	u8  green_pos;		/* 0x29 */
	u8  blue_size;		/* 0x2a */
	u8  blue_pos;		/* 0x2b */
	u8  rsvd_size;		/* 0x2c */
	u8  rsvd_pos;		/* 0x2d */
	u16 vesapm_seg;		/* 0x2e */
	u16 vesapm_off;		/* 0x30 */
	u16 pages;		/* 0x32 */
	u16 vesa_attributes;	/* 0x34 */
	u32  capabilities;      /* 0x36 */
				/* 0x3a -- 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_PICA_S3	0x30	/* ACER PICA-61 local S3 video	*/
#define VIDEO_TYPE_MIPS_G364	0x31    /* MIPS Magnum 4000 G364 video  */
#define VIDEO_TYPE_SGI          0x33    /* Various SGI graphics hardware */

#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. */

/*
 * 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 work_struct		work;
	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 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 semaphore termios_sem;
	struct termios *termios, *termios_locked;
	char name[64];
	int pgrp;
	int 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;

	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 */
	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 semaphore atomic_read;
	struct semaphore atomic_write;
	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_DONT_FLIP 		8	/* Defer buffer flip */
#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 termios tty_std_termios;
extern int fg_console, last_console, want_console;

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 void 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_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);
extern int tty_termios_baud_rate(struct termios *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);

struct semaphore;
extern struct semaphore tty_sem;

/* 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);

static inline dev_t tty_devnum(struct tty_struct *tty)
{
	return MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index;
}

#endif /* __KERNEL__ */
#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_TTY_H
	2	#define _LINUX_TTY_H
	3
	4	/*
	5	* 'tty.h' defines some structures used by tty_io.c and some defines.
	6	*/
	7
	8	/*
	9	* These constants are also useful for user-level apps (e.g., VC
	10	* resizing).
	11	*/
	12	#define MIN_NR_CONSOLES 1 /* must be at least 1 */
	13	#define MAX_NR_CONSOLES 63 /* serial lines start at 64 */
	14	#define MAX_NR_USER_CONSOLES 63 /* must be root to allocate above this */
	15	/* Note: the ioctl VT_GETSTATE does not work for
	16	consoles 16 and higher (since it returns a short) */
	17
	18	#ifdef __KERNEL__
	19	#include <linux/config.h>
	20	#include <linux/fs.h>
	21	#include <linux/major.h>
	22	#include <linux/termios.h>
	23	#include <linux/workqueue.h>
	24	#include <linux/tty_driver.h>
	25	#include <linux/tty_ldisc.h>
	26
	27	#include <asm/system.h>
	28
	29
	30	/*
	31	* (Note: the *_driver.minor_start values 1, 64, 128, 192 are
	32	* hardcoded at present.)
	33	*/
	34	#define NR_PTYS CONFIG_LEGACY_PTY_COUNT /* Number of legacy ptys */
	35	#define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
	36	#define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
	37	#define NR_LDISCS 16
	38
	39	/*
	40	* These are set up by the setup-routine at boot-time:
	41	*/
	42
	43	struct screen_info {
	44	u8 orig_x; /* 0x00 */
	45	u8 orig_y; /* 0x01 */
	46	u16 dontuse1; /* 0x02 -- EXT_MEM_K sits here */
	47	u16 orig_video_page; /* 0x04 */
	48	u8 orig_video_mode; /* 0x06 */
	49	u8 orig_video_cols; /* 0x07 */
	50	u16 unused2; /* 0x08 */
	51	u16 orig_video_ega_bx; /* 0x0a */
	52	u16 unused3; /* 0x0c */
	53	u8 orig_video_lines; /* 0x0e */
	54	u8 orig_video_isVGA; /* 0x0f */
	55	u16 orig_video_points; /* 0x10 */
	56
	57	/* VESA graphic mode -- linear frame buffer */
	58	u16 lfb_width; /* 0x12 */
	59	u16 lfb_height; /* 0x14 */
	60	u16 lfb_depth; /* 0x16 */
	61	u32 lfb_base; /* 0x18 */
	62	u32 lfb_size; /* 0x1c */
	63	u16 dontuse2, dontuse3; /* 0x20 -- CL_MAGIC and CL_OFFSET here */
	64	u16 lfb_linelength; /* 0x24 */
65	u8 red_size; /* 0x26 */
66	u8 red_pos; /* 0x27 */
67	u8 green_size; /* 0x28 */
68	u8 green_pos; /* 0x29 */
69	u8 blue_size; /* 0x2a */
70	u8 blue_pos; /* 0x2b */
71	u8 rsvd_size; /* 0x2c */
72	u8 rsvd_pos; /* 0x2d */
73	u16 vesapm_seg; /* 0x2e */
74	u16 vesapm_off; /* 0x30 */
75	u16 pages; /* 0x32 */
76	u16 vesa_attributes; /* 0x34 */
d2d58384 AD	77	u32 capabilities; /* 0x36 */
d2d58384 AD	78	/* 0x3a -- 0x3f reserved for future expansion */
1da177e4 LT	79	};
	80
	81	extern struct screen_info screen_info;
	82
	83	#define ORIG_X (screen_info.orig_x)
	84	#define ORIG_Y (screen_info.orig_y)
	85	#define ORIG_VIDEO_MODE (screen_info.orig_video_mode)
	86	#define ORIG_VIDEO_COLS (screen_info.orig_video_cols)
	87	#define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx)
	88	#define ORIG_VIDEO_LINES (screen_info.orig_video_lines)
	89	#define ORIG_VIDEO_ISVGA (screen_info.orig_video_isVGA)
	90	#define ORIG_VIDEO_POINTS (screen_info.orig_video_points)
	91
	92	#define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */
	93	#define VIDEO_TYPE_CGA 0x11 /* CGA Display */
	94	#define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */
	95	#define VIDEO_TYPE_EGAC 0x21 /* EGA in Color Mode */
	96	#define VIDEO_TYPE_VGAC 0x22 /* VGA+ in Color Mode */
	97	#define VIDEO_TYPE_VLFB 0x23 /* VESA VGA in graphic mode */
	98
	99	#define VIDEO_TYPE_PICA_S3 0x30 /* ACER PICA-61 local S3 video */
	100	#define VIDEO_TYPE_MIPS_G364 0x31 /* MIPS Magnum 4000 G364 video */
	101	#define VIDEO_TYPE_SGI 0x33 /* Various SGI graphics hardware */
	102
	103	#define VIDEO_TYPE_TGAC 0x40 /* DEC TGA */
	104
	105	#define VIDEO_TYPE_SUN 0x50 /* Sun frame buffer. */
	106	#define VIDEO_TYPE_SUNPCI 0x51 /* Sun PCI based frame buffer. */
	107
	108	#define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */
	109
	110	/*
	111	* This character is the same as _POSIX_VDISABLE: it cannot be used as
	112	* a c_cc[] character, but indicates that a particular special character
	113	* isn't in use (eg VINTR has no character etc)
	114	*/
	115	#define __DISABLED_CHAR '\0'
	116
	117	/*
	118	* This is the flip buffer used for the tty driver. The buffer is
	119	* located in the tty structure, and is used as a high speed interface
	120	* between the tty driver and the tty line discipline.
	121	*/
	122	#define TTY_FLIPBUF_SIZE 512
	123
	124	struct tty_flip_buffer {
	125	struct work_struct work;
	126	struct semaphore pty_sem;
	127	char *char_buf_ptr;
	128	unsigned char *flag_buf_ptr;
	129	int count;
	130	int buf_num;
	131	unsigned char char_buf[2*TTY_FLIPBUF_SIZE];
	132	char flag_buf[2*TTY_FLIPBUF_SIZE];
	133	unsigned char slop[4]; /* N.B. bug overwrites buffer by 1 */
	134	};
	135	/*
	136	* The pty uses char_buf and flag_buf as a contiguous buffer
	137	*/
	138	#define PTY_BUF_SIZE 4*TTY_FLIPBUF_SIZE
	139
	140	/*
	141	* When a break, frame error, or parity error happens, these codes are
	142	* stuffed into the flags buffer.
143	*/
144	#define TTY_NORMAL 0
145	#define TTY_BREAK 1
146	#define TTY_FRAME 2
147	#define TTY_PARITY 3
148	#define TTY_OVERRUN 4
149
150	#define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
151	#define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
152	#define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
153	#define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
154	#define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
155	#define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
156	#define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
157	#define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
158	#define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
159	#define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
160	#define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
161	#define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
162	#define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
163	#define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
164	#define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
165	#define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
166	#define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
167
168	#define _I_FLAG(tty,f) ((tty)->termios->c_iflag & (f))
169	#define _O_FLAG(tty,f) ((tty)->termios->c_oflag & (f))
170	#define _C_FLAG(tty,f) ((tty)->termios->c_cflag & (f))
171	#define _L_FLAG(tty,f) ((tty)->termios->c_lflag & (f))
172
173	#define I_IGNBRK(tty) _I_FLAG((tty),IGNBRK)
174	#define I_BRKINT(tty) _I_FLAG((tty),BRKINT)
175	#define I_IGNPAR(tty) _I_FLAG((tty),IGNPAR)
176	#define I_PARMRK(tty) _I_FLAG((tty),PARMRK)
177	#define I_INPCK(tty) _I_FLAG((tty),INPCK)
178	#define I_ISTRIP(tty) _I_FLAG((tty),ISTRIP)
179	#define I_INLCR(tty) _I_FLAG((tty),INLCR)
180	#define I_IGNCR(tty) _I_FLAG((tty),IGNCR)
181	#define I_ICRNL(tty) _I_FLAG((tty),ICRNL)
182	#define I_IUCLC(tty) _I_FLAG((tty),IUCLC)
183	#define I_IXON(tty) _I_FLAG((tty),IXON)
184	#define I_IXANY(tty) _I_FLAG((tty),IXANY)
185	#define I_IXOFF(tty) _I_FLAG((tty),IXOFF)
186	#define I_IMAXBEL(tty) _I_FLAG((tty),IMAXBEL)
187	#define I_IUTF8(tty) _I_FLAG((tty),IUTF8)
188
189	#define O_OPOST(tty) _O_FLAG((tty),OPOST)
190	#define O_OLCUC(tty) _O_FLAG((tty),OLCUC)
191	#define O_ONLCR(tty) _O_FLAG((tty),ONLCR)
192	#define O_OCRNL(tty) _O_FLAG((tty),OCRNL)
193	#define O_ONOCR(tty) _O_FLAG((tty),ONOCR)
194	#define O_ONLRET(tty) _O_FLAG((tty),ONLRET)
195	#define O_OFILL(tty) _O_FLAG((tty),OFILL)
196	#define O_OFDEL(tty) _O_FLAG((tty),OFDEL)
197	#define O_NLDLY(tty) _O_FLAG((tty),NLDLY)
198	#define O_CRDLY(tty) _O_FLAG((tty),CRDLY)
199	#define O_TABDLY(tty) _O_FLAG((tty),TABDLY)
200	#define O_BSDLY(tty) _O_FLAG((tty),BSDLY)
201	#define O_VTDLY(tty) _O_FLAG((tty),VTDLY)
202	#define O_FFDLY(tty) _O_FLAG((tty),FFDLY)
203
204	#define C_BAUD(tty) _C_FLAG((tty),CBAUD)
205	#define C_CSIZE(tty) _C_FLAG((tty),CSIZE)
206	#define C_CSTOPB(tty) _C_FLAG((tty),CSTOPB)
207	#define C_CREAD(tty) _C_FLAG((tty),CREAD)
208	#define C_PARENB(tty) _C_FLAG((tty),PARENB)
209	#define C_PARODD(tty) _C_FLAG((tty),PARODD)
210	#define C_HUPCL(tty) _C_FLAG((tty),HUPCL)
211	#define C_CLOCAL(tty) _C_FLAG((tty),CLOCAL)
212	#define C_CIBAUD(tty) _C_FLAG((tty),CIBAUD)
213	#define C_CRTSCTS(tty) _C_FLAG((tty),CRTSCTS)
214
215	#define L_ISIG(tty) _L_FLAG((tty),ISIG)
216	#define L_ICANON(tty) _L_FLAG((tty),ICANON)
217	#define L_XCASE(tty) _L_FLAG((tty),XCASE)
218	#define L_ECHO(tty) _L_FLAG((tty),ECHO)
219	#define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
220	#define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
221	#define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
222	#define L_NOFLSH(tty) _L_FLAG((tty),NOFLSH)
223	#define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
224	#define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
225	#define L_ECHOPRT(tty) _L_FLAG((tty),ECHOPRT)
226	#define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
227	#define L_FLUSHO(tty) _L_FLAG((tty),FLUSHO)
228	#define L_PENDIN(tty) _L_FLAG((tty),PENDIN)
229	#define L_IEXTEN(tty) _L_FLAG((tty),IEXTEN)
230
231	struct device;
232	/*
233	* Where all of the state associated with a tty is kept while the tty
234	* is open. Since the termios state should be kept even if the tty
235	* has been closed --- for things like the baud rate, etc --- it is
236	* not stored here, but rather a pointer to the real state is stored
237	* here. Possible the winsize structure should have the same
238	* treatment, but (1) the default 80x24 is usually right and (2) it's
239	* most often used by a windowing system, which will set the correct
240	* size each time the window is created or resized anyway.
241	* - TYT, 9/14/92
242	*/
243	struct tty_struct {
244	int magic;
245	struct tty_driver *driver;
246	int index;
247	struct tty_ldisc ldisc;
248	struct semaphore termios_sem;
249	struct termios termios, termios_locked;
250	char name[64];
251	int pgrp;
252	int session;
253	unsigned long flags;
254	int count;
255	struct winsize winsize;
256	unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
257	unsigned char low_latency:1, warned:1;
258	unsigned char ctrl_status;
259
260	struct tty_struct *link;
261	struct fasync_struct *fasync;
262	struct tty_flip_buffer flip;
263	int max_flip_cnt;
264	int alt_speed; /* For magic substitution of 38400 bps */
265	wait_queue_head_t write_wait;
266	wait_queue_head_t read_wait;
267	struct work_struct hangup_work;
268	void *disc_data;
269	void *driver_data;
270	struct list_head tty_files;
271
272	#define N_TTY_BUF_SIZE 4096
273
274	/*
275	* The following is data for the N_TTY line discipline. For
276	* historical reasons, this is included in the tty structure.
277	*/
278	unsigned int column;
279	unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
280	unsigned char closing:1;
281	unsigned short minimum_to_wake;
282	unsigned long overrun_time;
283	int num_overrun;
284	unsigned long process_char_map[256/(8*sizeof(unsigned long))];
285	char *read_buf;
286	int read_head;
287	int read_tail;
288	int read_cnt;
289	unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
290	int canon_data;
291	unsigned long canon_head;
292	unsigned int canon_column;
293	struct semaphore atomic_read;
294	struct semaphore atomic_write;
295	unsigned char *write_buf;
296	int write_cnt;
297	spinlock_t read_lock;
298	/* If the tty has a pending do_SAK, queue it here - akpm */
299	struct work_struct SAK_work;
300	};
301
302	/* tty magic number */
303	#define TTY_MAGIC 0x5401
304
305	/*
306	* These bits are used in the flags field of the tty structure.
307	*
308	* So that interrupts won't be able to mess up the queues,
309	* copy_to_cooked must be atomic with respect to itself, as must
310	* tty->write. Thus, you must use the inline functions set_bit() and
311	* clear_bit() to make things atomic.
312	*/
313	#define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */
314	#define TTY_IO_ERROR 1 /* Canse an I/O error (may be no ldisc too) */
315	#define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */
316	#define TTY_EXCLUSIVE 3 /* Exclusive open mode */
317	#define TTY_DEBUG 4 /* Debugging */
318	#define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */
319	#define TTY_PUSH 6 /* n_tty private */
320	#define TTY_CLOSING 7 /* ->close() in progress */
321	#define TTY_DONT_FLIP 8 /* Defer buffer flip */
322	#define TTY_LDISC 9 /* Line discipline attached */
323	#define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */
324	#define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */
325	#define TTY_PTY_LOCK 16 /* pty private */
326	#define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */
327	#define TTY_HUPPED 18 /* Post driver->hangup() */
328
329	#define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
330
331	extern void tty_write_flush(struct tty_struct *);
332
333	extern struct termios tty_std_termios;
334	extern int fg_console, last_console, want_console;
335
336	extern int kmsg_redirect;
337
338	extern void console_init(void);
339	extern int vcs_init(void);
340
341	extern int tty_paranoia_check(struct tty_struct tty, struct inode inode,
342	const char *routine);
343	extern char tty_name(struct tty_struct tty, char *buf);
344	extern void tty_wait_until_sent(struct tty_struct * tty, long timeout);
345	extern int tty_check_change(struct tty_struct * tty);
346	extern void stop_tty(struct tty_struct * tty);
347	extern void start_tty(struct tty_struct * tty);
348	extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc);
bfb07599	349	extern int tty_unregister_ldisc(int disc);
1da177e4 LT	350	extern int tty_register_driver(struct tty_driver *driver);
	351	extern int tty_unregister_driver(struct tty_driver *driver);
	352	extern void tty_register_device(struct tty_driver driver, unsigned index, struct device dev);
	353	extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
	354	extern int tty_read_raw_data(struct tty_struct tty, unsigned char bufp,
	355	int buflen);
	356	extern void tty_write_message(struct tty_struct tty, char msg);
	357
	358	extern int is_orphaned_pgrp(int pgrp);
	359	extern int is_ignored(int sig);
	360	extern int tty_signal(int sig, struct tty_struct *tty);
	361	extern void tty_hangup(struct tty_struct * tty);
	362	extern void tty_vhangup(struct tty_struct * tty);
	363	extern void tty_unhangup(struct file *filp);
	364	extern int tty_hung_up_p(struct file * filp);
	365	extern void do_SAK(struct tty_struct *tty);
	366	extern void disassociate_ctty(int priv);
	367	extern void tty_flip_buffer_push(struct tty_struct *tty);
	368	extern int tty_get_baud_rate(struct tty_struct *tty);
	369	extern int tty_termios_baud_rate(struct termios *termios);
	370
	371	extern struct tty_ldisc tty_ldisc_ref(struct tty_struct );
	372	extern void tty_ldisc_deref(struct tty_ldisc *);
	373	extern struct tty_ldisc tty_ldisc_ref_wait(struct tty_struct );
	374
	375	extern struct tty_ldisc *tty_ldisc_get(int);
	376	extern void tty_ldisc_put(int);
	377
	378	extern void tty_wakeup(struct tty_struct *tty);
	379	extern void tty_ldisc_flush(struct tty_struct *tty);
	380
	381	struct semaphore;
	382	extern struct semaphore tty_sem;
	383
	384	/* n_tty.c */
	385	extern struct tty_ldisc tty_ldisc_N_TTY;
	386
	387	/* tty_ioctl.c */
	388	extern int n_tty_ioctl(struct tty_struct * tty, struct file * file,
	389	unsigned int cmd, unsigned long arg);
	390
	391	/* serial.c */
	392
	393	extern void serial_console_init(void);
	394
	395	/* pcxx.c */
	396
	397	extern int pcxe_open(struct tty_struct tty, struct file filp);
	398
	399	/* printk.c */
	400
	401	extern void console_print(const char *);
	402
	403	/* vt.c */
	404
	405	extern int vt_ioctl(struct tty_struct tty, struct file file,
	406	unsigned int cmd, unsigned long arg);
	407
	408	static inline dev_t tty_devnum(struct tty_struct *tty)
	409	{
	410	return MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index;
	411	}
	412
	413	#endif /* __KERNEL__ */
414	#endif