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1275 |
phoenix |
#ifndef _LINUX_TTY_H
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#define _LINUX_TTY_H
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/*
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* 'tty.h' defines some structures used by tty_io.c and some defines.
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*/
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/*
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* These constants are also useful for user-level apps (e.g., VC
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* resizing).
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*/
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#define MIN_NR_CONSOLES 1 /* must be at least 1 */
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#define MAX_NR_CONSOLES 63 /* serial lines start at 64 */
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#define MAX_NR_USER_CONSOLES 63 /* must be root to allocate above this */
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/* Note: the ioctl VT_GETSTATE does not work for
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consoles 16 and higher (since it returns a short) */
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#ifdef __KERNEL__
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#include <linux/config.h>
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#include <linux/fs.h>
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#include <linux/major.h>
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#include <linux/termios.h>
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#include <linux/tqueue.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_ldisc.h>
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#include <asm/system.h>
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/*
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* Note: don't mess with NR_PTYS until you understand the tty minor
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* number allocation game...
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* (Note: the *_driver.minor_start values 1, 64, 128, 192 are
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* hardcoded at present.)
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*/
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#define NR_PTYS 256 /* ptys/major */
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#define NR_LDISCS 16
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/*
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* Unix98 PTY's can be defined as any multiple of NR_PTYS up to
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* UNIX98_PTY_MAJOR_COUNT; this section defines what we need from the
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* config options
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*/
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#ifdef CONFIG_UNIX98_PTYS
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# define UNIX98_NR_MAJORS ((CONFIG_UNIX98_PTY_COUNT+NR_PTYS-1)/NR_PTYS)
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# if UNIX98_NR_MAJORS <= 0
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# undef CONFIG_UNIX98_PTYS
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# elif UNIX98_NR_MAJORS > UNIX98_PTY_MAJOR_COUNT
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# error Too many Unix98 ptys defined
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# undef UNIX98_NR_MAJORS
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# define UNIX98_NR_MAJORS UNIX98_PTY_MAJOR_COUNT
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# endif
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#endif
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/*
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* These are set up by the setup-routine at boot-time:
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*/
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struct screen_info {
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u8 orig_x; /* 0x00 */
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u8 orig_y; /* 0x01 */
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u16 dontuse1; /* 0x02 -- EXT_MEM_K sits here */
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u16 orig_video_page; /* 0x04 */
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u8 orig_video_mode; /* 0x06 */
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u8 orig_video_cols; /* 0x07 */
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u16 unused2; /* 0x08 */
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u16 orig_video_ega_bx; /* 0x0a */
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u16 unused3; /* 0x0c */
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u8 orig_video_lines; /* 0x0e */
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u8 orig_video_isVGA; /* 0x0f */
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u16 orig_video_points; /* 0x10 */
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/* VESA graphic mode -- linear frame buffer */
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u16 lfb_width; /* 0x12 */
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u16 lfb_height; /* 0x14 */
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u16 lfb_depth; /* 0x16 */
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u32 lfb_base; /* 0x18 */
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u32 lfb_size; /* 0x1c */
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u16 dontuse2, dontuse3; /* 0x20 -- CL_MAGIC and CL_OFFSET here */
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u16 lfb_linelength; /* 0x24 */
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u8 red_size; /* 0x26 */
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u8 red_pos; /* 0x27 */
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u8 green_size; /* 0x28 */
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u8 green_pos; /* 0x29 */
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u8 blue_size; /* 0x2a */
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u8 blue_pos; /* 0x2b */
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u8 rsvd_size; /* 0x2c */
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u8 rsvd_pos; /* 0x2d */
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u16 vesapm_seg; /* 0x2e */
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u16 vesapm_off; /* 0x30 */
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u16 pages; /* 0x32 */
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/* 0x34 -- 0x3f reserved for future expansion */
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};
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extern struct screen_info screen_info;
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#define ORIG_X (screen_info.orig_x)
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#define ORIG_Y (screen_info.orig_y)
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#define ORIG_VIDEO_MODE (screen_info.orig_video_mode)
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#define ORIG_VIDEO_COLS (screen_info.orig_video_cols)
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#define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx)
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#define ORIG_VIDEO_LINES (screen_info.orig_video_lines)
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#define ORIG_VIDEO_ISVGA (screen_info.orig_video_isVGA)
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#define ORIG_VIDEO_POINTS (screen_info.orig_video_points)
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#define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */
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#define VIDEO_TYPE_CGA 0x11 /* CGA Display */
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#define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */
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#define VIDEO_TYPE_EGAC 0x21 /* EGA in Color Mode */
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#define VIDEO_TYPE_VGAC 0x22 /* VGA+ in Color Mode */
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#define VIDEO_TYPE_VLFB 0x23 /* VESA VGA in graphic mode */
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#define VIDEO_TYPE_PICA_S3 0x30 /* ACER PICA-61 local S3 video */
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#define VIDEO_TYPE_MIPS_G364 0x31 /* MIPS Magnum 4000 G364 video */
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#define VIDEO_TYPE_SNI_RM 0x32 /* SNI RM200 PCI video */
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#define VIDEO_TYPE_SGI 0x33 /* Various SGI graphics hardware */
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#define VIDEO_TYPE_TGAC 0x40 /* DEC TGA */
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#define VIDEO_TYPE_SUN 0x50 /* Sun frame buffer. */
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#define VIDEO_TYPE_SUNPCI 0x51 /* Sun PCI based frame buffer. */
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#define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */
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/*
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* This character is the same as _POSIX_VDISABLE: it cannot be used as
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* a c_cc[] character, but indicates that a particular special character
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* isn't in use (eg VINTR has no character etc)
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*/
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#define __DISABLED_CHAR '\0'
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/*
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* This is the flip buffer used for the tty driver. The buffer is
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* located in the tty structure, and is used as a high speed interface
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* between the tty driver and the tty line discipline.
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*/
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#define TTY_FLIPBUF_SIZE 512
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struct tty_flip_buffer {
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struct tq_struct tqueue;
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struct semaphore pty_sem;
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char *char_buf_ptr;
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unsigned char *flag_buf_ptr;
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int count;
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int buf_num;
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unsigned char char_buf[2*TTY_FLIPBUF_SIZE];
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char flag_buf[2*TTY_FLIPBUF_SIZE];
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unsigned char slop[4]; /* N.B. bug overwrites buffer by 1 */
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};
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/*
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* The pty uses char_buf and flag_buf as a contiguous buffer
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*/
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#define PTY_BUF_SIZE 4*TTY_FLIPBUF_SIZE
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/*
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* When a break, frame error, or parity error happens, these codes are
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* stuffed into the flags buffer.
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*/
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#define TTY_NORMAL 0
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#define TTY_BREAK 1
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#define TTY_FRAME 2
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#define TTY_PARITY 3
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#define TTY_OVERRUN 4
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#define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
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#define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
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#define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
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#define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
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#define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
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#define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
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#define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
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#define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
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#define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
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#define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
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#define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
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#define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
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#define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
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#define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
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#define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
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#define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
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#define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
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#define _I_FLAG(tty,f) ((tty)->termios->c_iflag & (f))
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#define _O_FLAG(tty,f) ((tty)->termios->c_oflag & (f))
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#define _C_FLAG(tty,f) ((tty)->termios->c_cflag & (f))
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#define _L_FLAG(tty,f) ((tty)->termios->c_lflag & (f))
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#define I_IGNBRK(tty) _I_FLAG((tty),IGNBRK)
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#define I_BRKINT(tty) _I_FLAG((tty),BRKINT)
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#define I_IGNPAR(tty) _I_FLAG((tty),IGNPAR)
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#define I_PARMRK(tty) _I_FLAG((tty),PARMRK)
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#define I_INPCK(tty) _I_FLAG((tty),INPCK)
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#define I_ISTRIP(tty) _I_FLAG((tty),ISTRIP)
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#define I_INLCR(tty) _I_FLAG((tty),INLCR)
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#define I_IGNCR(tty) _I_FLAG((tty),IGNCR)
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#define I_ICRNL(tty) _I_FLAG((tty),ICRNL)
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#define I_IUCLC(tty) _I_FLAG((tty),IUCLC)
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#define I_IXON(tty) _I_FLAG((tty),IXON)
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#define I_IXANY(tty) _I_FLAG((tty),IXANY)
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#define I_IXOFF(tty) _I_FLAG((tty),IXOFF)
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#define I_IMAXBEL(tty) _I_FLAG((tty),IMAXBEL)
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#define O_OPOST(tty) _O_FLAG((tty),OPOST)
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#define O_OLCUC(tty) _O_FLAG((tty),OLCUC)
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#define O_ONLCR(tty) _O_FLAG((tty),ONLCR)
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#define O_OCRNL(tty) _O_FLAG((tty),OCRNL)
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#define O_ONOCR(tty) _O_FLAG((tty),ONOCR)
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#define O_ONLRET(tty) _O_FLAG((tty),ONLRET)
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#define O_OFILL(tty) _O_FLAG((tty),OFILL)
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#define O_OFDEL(tty) _O_FLAG((tty),OFDEL)
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#define O_NLDLY(tty) _O_FLAG((tty),NLDLY)
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#define O_CRDLY(tty) _O_FLAG((tty),CRDLY)
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#define O_TABDLY(tty) _O_FLAG((tty),TABDLY)
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#define O_BSDLY(tty) _O_FLAG((tty),BSDLY)
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#define O_VTDLY(tty) _O_FLAG((tty),VTDLY)
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#define O_FFDLY(tty) _O_FLAG((tty),FFDLY)
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#define C_BAUD(tty) _C_FLAG((tty),CBAUD)
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#define C_CSIZE(tty) _C_FLAG((tty),CSIZE)
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#define C_CSTOPB(tty) _C_FLAG((tty),CSTOPB)
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#define C_CREAD(tty) _C_FLAG((tty),CREAD)
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#define C_PARENB(tty) _C_FLAG((tty),PARENB)
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#define C_PARODD(tty) _C_FLAG((tty),PARODD)
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#define C_HUPCL(tty) _C_FLAG((tty),HUPCL)
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#define C_CLOCAL(tty) _C_FLAG((tty),CLOCAL)
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#define C_CIBAUD(tty) _C_FLAG((tty),CIBAUD)
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#define C_CRTSCTS(tty) _C_FLAG((tty),CRTSCTS)
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#define L_ISIG(tty) _L_FLAG((tty),ISIG)
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#define L_ICANON(tty) _L_FLAG((tty),ICANON)
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#define L_XCASE(tty) _L_FLAG((tty),XCASE)
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#define L_ECHO(tty) _L_FLAG((tty),ECHO)
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#define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
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#define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
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#define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
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#define L_NOFLSH(tty) _L_FLAG((tty),NOFLSH)
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#define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
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#define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
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#define L_ECHOPRT(tty) _L_FLAG((tty),ECHOPRT)
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#define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
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#define L_FLUSHO(tty) _L_FLAG((tty),FLUSHO)
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#define L_PENDIN(tty) _L_FLAG((tty),PENDIN)
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#define L_IEXTEN(tty) _L_FLAG((tty),IEXTEN)
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/*
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* Where all of the state associated with a tty is kept while the tty
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* is open. Since the termios state should be kept even if the tty
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* has been closed --- for things like the baud rate, etc --- it is
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* not stored here, but rather a pointer to the real state is stored
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* here. Possible the winsize structure should have the same
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* treatment, but (1) the default 80x24 is usually right and (2) it's
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* most often used by a windowing system, which will set the correct
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* size each time the window is created or resized anyway.
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* IMPORTANT: since this structure is dynamically allocated, it must
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* be no larger than 4096 bytes. Changing TTY_FLIPBUF_SIZE will change
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* the size of this structure, and it needs to be done with care.
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* - TYT, 9/14/92
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*/
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struct tty_struct {
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int magic;
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struct tty_driver driver;
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262 |
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struct tty_ldisc ldisc;
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263 |
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struct termios *termios, *termios_locked;
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264 |
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int pgrp;
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265 |
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int session;
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266 |
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kdev_t device;
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267 |
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unsigned long flags;
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268 |
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int count;
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269 |
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struct winsize winsize;
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270 |
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unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
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unsigned char low_latency:1, warned:1;
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272 |
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unsigned char ctrl_status;
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273 |
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struct tty_struct *link;
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struct fasync_struct *fasync;
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struct tty_flip_buffer flip;
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277 |
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int max_flip_cnt;
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278 |
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int alt_speed; /* For magic substitution of 38400 bps */
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279 |
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wait_queue_head_t write_wait;
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280 |
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wait_queue_head_t read_wait;
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281 |
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struct tq_struct tq_hangup;
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282 |
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void *disc_data;
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283 |
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void *driver_data;
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284 |
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struct list_head tty_files;
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285 |
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286 |
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#define N_TTY_BUF_SIZE 4096
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288 |
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/*
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289 |
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* The following is data for the N_TTY line discipline. For
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* historical reasons, this is included in the tty structure.
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*/
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292 |
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unsigned int column;
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293 |
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unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
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294 |
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unsigned char closing:1;
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295 |
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unsigned short minimum_to_wake;
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296 |
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unsigned long overrun_time;
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297 |
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int num_overrun;
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298 |
|
|
unsigned long process_char_map[256/(8*sizeof(unsigned long))];
|
299 |
|
|
char *read_buf;
|
300 |
|
|
int read_head;
|
301 |
|
|
int read_tail;
|
302 |
|
|
int read_cnt;
|
303 |
|
|
unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
|
304 |
|
|
int canon_data;
|
305 |
|
|
unsigned long canon_head;
|
306 |
|
|
unsigned int canon_column;
|
307 |
|
|
struct semaphore atomic_read;
|
308 |
|
|
struct semaphore atomic_write;
|
309 |
|
|
spinlock_t read_lock;
|
310 |
|
|
/* If the tty has a pending do_SAK, queue it here - akpm */
|
311 |
|
|
struct tq_struct SAK_tq;
|
312 |
|
|
};
|
313 |
|
|
|
314 |
|
|
/* tty magic number */
|
315 |
|
|
#define TTY_MAGIC 0x5401
|
316 |
|
|
|
317 |
|
|
/*
|
318 |
|
|
* These bits are used in the flags field of the tty structure.
|
319 |
|
|
*
|
320 |
|
|
* So that interrupts won't be able to mess up the queues,
|
321 |
|
|
* copy_to_cooked must be atomic with respect to itself, as must
|
322 |
|
|
* tty->write. Thus, you must use the inline functions set_bit() and
|
323 |
|
|
* clear_bit() to make things atomic.
|
324 |
|
|
*/
|
325 |
|
|
#define TTY_THROTTLED 0
|
326 |
|
|
#define TTY_IO_ERROR 1
|
327 |
|
|
#define TTY_OTHER_CLOSED 2
|
328 |
|
|
#define TTY_EXCLUSIVE 3
|
329 |
|
|
#define TTY_DEBUG 4
|
330 |
|
|
#define TTY_DO_WRITE_WAKEUP 5
|
331 |
|
|
#define TTY_PUSH 6
|
332 |
|
|
#define TTY_CLOSING 7
|
333 |
|
|
#define TTY_DONT_FLIP 8
|
334 |
|
|
#define TTY_HW_COOK_OUT 14
|
335 |
|
|
#define TTY_HW_COOK_IN 15
|
336 |
|
|
#define TTY_PTY_LOCK 16
|
337 |
|
|
#define TTY_NO_WRITE_SPLIT 17
|
338 |
|
|
|
339 |
|
|
#define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
|
340 |
|
|
|
341 |
|
|
extern void tty_write_flush(struct tty_struct *);
|
342 |
|
|
|
343 |
|
|
extern struct termios tty_std_termios;
|
344 |
|
|
extern struct tty_ldisc ldiscs[];
|
345 |
|
|
extern int fg_console, last_console, want_console;
|
346 |
|
|
|
347 |
|
|
extern int kmsg_redirect;
|
348 |
|
|
|
349 |
|
|
extern void con_init(void);
|
350 |
|
|
extern void console_init(void);
|
351 |
|
|
|
352 |
|
|
extern int lp_init(void);
|
353 |
|
|
extern int pty_init(void);
|
354 |
|
|
extern void tty_init(void);
|
355 |
|
|
extern int mxser_init(void);
|
356 |
|
|
extern int moxa_init(void);
|
357 |
|
|
extern int ip2_init(void);
|
358 |
|
|
extern int pcxe_init(void);
|
359 |
|
|
extern int pc_init(void);
|
360 |
|
|
extern int vcs_init(void);
|
361 |
|
|
extern int rp_init(void);
|
362 |
|
|
extern int cy_init(void);
|
363 |
|
|
extern int stl_init(void);
|
364 |
|
|
extern int stli_init(void);
|
365 |
|
|
extern int specialix_init(void);
|
366 |
|
|
extern int espserial_init(void);
|
367 |
|
|
extern int macserial_init(void);
|
368 |
|
|
extern int a2232board_init(void);
|
369 |
|
|
|
370 |
|
|
extern int tty_paranoia_check(struct tty_struct *tty, kdev_t device,
|
371 |
|
|
const char *routine);
|
372 |
|
|
extern char *tty_name(struct tty_struct *tty, char *buf);
|
373 |
|
|
extern void tty_wait_until_sent(struct tty_struct * tty, long timeout);
|
374 |
|
|
extern int tty_check_change(struct tty_struct * tty);
|
375 |
|
|
extern void stop_tty(struct tty_struct * tty);
|
376 |
|
|
extern void start_tty(struct tty_struct * tty);
|
377 |
|
|
extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc);
|
378 |
|
|
extern int tty_register_driver(struct tty_driver *driver);
|
379 |
|
|
extern int tty_unregister_driver(struct tty_driver *driver);
|
380 |
|
|
extern void tty_register_devfs (struct tty_driver *driver, unsigned int flags,
|
381 |
|
|
unsigned minor);
|
382 |
|
|
extern void tty_unregister_devfs (struct tty_driver *driver, unsigned minor);
|
383 |
|
|
extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
|
384 |
|
|
int buflen);
|
385 |
|
|
extern void tty_write_message(struct tty_struct *tty, char *msg);
|
386 |
|
|
|
387 |
|
|
extern int is_orphaned_pgrp(int pgrp);
|
388 |
|
|
extern int is_ignored(int sig);
|
389 |
|
|
extern int tty_signal(int sig, struct tty_struct *tty);
|
390 |
|
|
extern void tty_hangup(struct tty_struct * tty);
|
391 |
|
|
extern void tty_vhangup(struct tty_struct * tty);
|
392 |
|
|
extern void tty_unhangup(struct file *filp);
|
393 |
|
|
extern int tty_hung_up_p(struct file * filp);
|
394 |
|
|
extern void do_SAK(struct tty_struct *tty);
|
395 |
|
|
extern void disassociate_ctty(int priv);
|
396 |
|
|
extern void tty_flip_buffer_push(struct tty_struct *tty);
|
397 |
|
|
extern int tty_get_baud_rate(struct tty_struct *tty);
|
398 |
|
|
|
399 |
|
|
/* n_tty.c */
|
400 |
|
|
extern struct tty_ldisc tty_ldisc_N_TTY;
|
401 |
|
|
|
402 |
|
|
/* tty_ioctl.c */
|
403 |
|
|
extern int n_tty_ioctl(struct tty_struct * tty, struct file * file,
|
404 |
|
|
unsigned int cmd, unsigned long arg);
|
405 |
|
|
|
406 |
|
|
/* serial.c */
|
407 |
|
|
|
408 |
|
|
extern void serial_console_init(void);
|
409 |
|
|
|
410 |
|
|
/* pcxx.c */
|
411 |
|
|
|
412 |
|
|
extern int pcxe_open(struct tty_struct *tty, struct file *filp);
|
413 |
|
|
|
414 |
|
|
/* printk.c */
|
415 |
|
|
|
416 |
|
|
extern void console_print(const char *);
|
417 |
|
|
|
418 |
|
|
/* vt.c */
|
419 |
|
|
|
420 |
|
|
extern int vt_ioctl(struct tty_struct *tty, struct file * file,
|
421 |
|
|
unsigned int cmd, unsigned long arg);
|
422 |
|
|
|
423 |
|
|
#endif /* __KERNEL__ */
|
424 |
|
|
#endif
|