491 lines
14 KiB
C
491 lines
14 KiB
C
/*
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* Copyright (c) 2006-2023, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021.12.07 linzhenxing first version
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*/
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#ifndef __TTY_H__
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#define __TTY_H__
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#include <rthw.h>
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#include <rtthread.h>
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#include <tty_ldisc.h>
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#ifdef RT_USING_SMART
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#include <lwp.h>
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#endif
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#if defined(RT_USING_POSIX_TERMIOS)
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#include <poll.h>
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#include <termios.h>
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#endif
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#ifndef ENOIOCTLCMD
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#define ENOIOCTLCMD (515) /* No ioctl command */
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#endif
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#define current lwp_self()
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#define __DISABLED_CHAR '\0'
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struct tty_node
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{
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struct rt_lwp *lwp;
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struct tty_node *next;
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};
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void tty_initstack(struct tty_node *node);
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int tty_push(struct tty_node **head, struct rt_lwp *lwp);
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struct rt_lwp *tty_pop(struct tty_node **head, struct rt_lwp *target_lwp);
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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)->init_termios.c_cc[VINTR])
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#define QUIT_CHAR(tty) ((tty)->init_termios.c_cc[VQUIT])
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#define ERASE_CHAR(tty) ((tty)->init_termios.c_cc[VERASE])
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#define KILL_CHAR(tty) ((tty)->init_termios.c_cc[VKILL])
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#define EOF_CHAR(tty) ((tty)->init_termios.c_cc[VEOF])
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#define TIME_CHAR(tty) ((tty)->init_termios.c_cc[VTIME])
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#define MIN_CHAR(tty) ((tty)->init_termios.c_cc[VMIN])
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#define SWTC_CHAR(tty) ((tty)->init_termios.c_cc[VSWTC])
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#define START_CHAR(tty) ((tty)->init_termios.c_cc[VSTART])
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#define STOP_CHAR(tty) ((tty)->init_termios.c_cc[VSTOP])
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#define SUSP_CHAR(tty) ((tty)->init_termios.c_cc[VSUSP])
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#define EOL_CHAR(tty) ((tty)->init_termios.c_cc[VEOL])
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#define REPRINT_CHAR(tty) ((tty)->init_termios.c_cc[VREPRINT])
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#define DISCARD_CHAR(tty) ((tty)->init_termios.c_cc[VDISCARD])
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#define WERASE_CHAR(tty) ((tty)->init_termios.c_cc[VWERASE])
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#define LNEXT_CHAR(tty) ((tty)->init_termios.c_cc[VLNEXT])
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#define EOL2_CHAR(tty) ((tty)->init_termios.c_cc[VEOL2])
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#define _I_FLAG(tty,f) ((tty)->init_termios.c_iflag & (f))
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#define _O_FLAG(tty,f) ((tty)->init_termios.c_oflag & (f))
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#define _C_FLAG(tty,f) ((tty)->init_termios.c_cflag & (f))
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#define _L_FLAG(tty,f) ((tty)->init_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 I_IUTF8(tty) _I_FLAG((tty), IUTF8)
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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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#define L_EXTPROC(tty) _L_FLAG((tty), EXTPROC)
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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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* - TYT, 9/14/92
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*/
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struct tty_struct
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{
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struct rt_device parent;
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int type;
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int subtype;
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int init_flag;
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int index; //for pty
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int pts_lock; //for pty
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struct tty_struct *other_struct; //for pty
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struct termios init_termios;
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struct winsize winsize;
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struct rt_mutex lock;
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pid_t pgrp;
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pid_t session;
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struct rt_lwp *foreground;
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struct tty_node *head;
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struct tty_ldisc *ldisc;
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void *disc_data;
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struct rt_device *driver;
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struct rt_wqueue wait_queue;
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#define RT_TTY_BUF 1024
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rt_list_t tty_drivers;
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};
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enum
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{
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TTY_INIT_FLAG_NONE = 0,
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TTY_INIT_FLAG_ALLOCED,
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TTY_INIT_FLAG_REGED,
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TTY_INIT_FLAG_INITED,
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};
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#define TTY_DRIVER_TYPE_SYSTEM 0x0001
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#define TTY_DRIVER_TYPE_CONSOLE 0x0002
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#define TTY_DRIVER_TYPE_SERIAL 0x0003
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#define TTY_DRIVER_TYPE_PTY 0x0004
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#define TTY_DRIVER_TYPE_SCC 0x0005 /* scc driver */
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#define TTY_DRIVER_TYPE_SYSCONS 0x0006
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/* tty magic number */
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#define TTY_MAGIC 0x5401
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/*
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* These bits are used in the flags field of the tty structure.
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*
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* So that interrupts won't be able to mess up the queues,
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* copy_to_cooked must be atomic with respect to itself, as must
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* tty->write. Thus, you must use the inline functions set_bit() and
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* clear_bit() to make things atomic.
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*/
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#define TTY_THROTTLED 0
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#define TTY_IO_ERROR 1
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#define TTY_OTHER_CLOSED 2
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#define TTY_EXCLUSIVE 3
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#define TTY_DEBUG 4
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#define TTY_DO_WRITE_WAKEUP 5
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#define TTY_PUSH 6
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#define TTY_CLOSING 7
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#define TTY_DONT_FLIP 8
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#define TTY_HW_COOK_OUT 14
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#define TTY_HW_COOK_IN 15
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#define TTY_PTY_LOCK 16
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#define TTY_NO_WRITE_SPLIT 17
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/*
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* These bits are used in the flags field of the tty structure.
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*
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* So that interrupts won't be able to mess up the queues,
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* copy_to_cooked must be atomic with respect to itself, as must
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* tty->write. Thus, you must use the inline functions set_bit() and
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* clear_bit() to make things atomic.
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*/
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#define TTY_THROTTLED 0
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#define TTY_IO_ERROR 1
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#define TTY_OTHER_CLOSED 2
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#define TTY_EXCLUSIVE 3
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#define TTY_DEBUG 4
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#define TTY_DO_WRITE_WAKEUP 5
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#define TTY_PUSH 6
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#define TTY_CLOSING 7
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#define TTY_DONT_FLIP 8
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#define TTY_HW_COOK_OUT 14
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#define TTY_HW_COOK_IN 15
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#define TTY_PTY_LOCK 16
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#define TTY_NO_WRITE_SPLIT 17
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#define NR_LDISCS 30
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/* line disciplines */
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#define N_TTY 0
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#define N_SLIP 1
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#define N_MOUSE 2
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#define N_PPP 3
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#define N_STRIP 4
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#define N_AX25 5
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#define N_X25 6 /* X.25 async */
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#define N_6PACK 7
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#define N_MASC 8 /* Reserved for Mobitex module <kaz@cafe.net> */
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#define N_R3964 9 /* Reserved for Simatic R3964 module */
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#define N_PROFIBUS_FDL 10 /* Reserved for Profibus */
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#define N_IRDA 11 /* Linux IrDa - http://irda.sourceforge.net/ */
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#define N_SMSBLOCK 12 /* SMS block mode - for talking to GSM data */
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/* cards about SMS messages */
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#define N_HDLC 13 /* synchronous HDLC */
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#define N_SYNC_PPP 14 /* synchronous PPP */
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#define N_HCI 15 /* Bluetooth HCI UART */
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#define N_GIGASET_M101 16 /* Siemens Gigaset M101 serial DECT adapter */
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#define N_SLCAN 17 /* Serial / USB serial CAN Adaptors */
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#define N_PPS 18 /* Pulse per Second */
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#define N_V253 19 /* Codec control over voice modem */
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#define N_CAIF 20 /* CAIF protocol for talking to modems */
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#define N_GSM0710 21 /* GSM 0710 Mux */
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#define N_TI_WL 22 /* for TI's WL BT, FM, GPS combo chips */
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#define N_TRACESINK 23 /* Trace data routing for MIPI P1149.7 */
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#define N_TRACEROUTER 24 /* Trace data routing for MIPI P1149.7 */
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#define N_NCI 25 /* NFC NCI UART */
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/* Used for packet mode */
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#define TIOCPKT_DATA 0
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#define TIOCPKT_FLUSHREAD 1
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#define TIOCPKT_FLUSHWRITE 2
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#define TIOCPKT_STOP 4
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#define TIOCPKT_START 8
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#define TIOCPKT_NOSTOP 16
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#define TIOCPKT_DOSTOP 32
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/* tty driver types */
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#define TTY_DRIVER_TYPE_SYSTEM 0x0001
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#define TTY_DRIVER_TYPE_CONSOLE 0x0002
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#define TTY_DRIVER_TYPE_SERIAL 0x0003
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#define TTY_DRIVER_TYPE_PTY 0x0004
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#define TTY_DRIVER_TYPE_SCC 0x0005 /* scc driver */
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#define TTY_DRIVER_TYPE_SYSCONS 0x0006
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/* pty subtypes */
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#define PTY_TYPE_MASTER 0x0001
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#define PTY_TYPE_SLAVE 0x0002
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/* serial subtype definitions */
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#define SERIAL_TYPE_NORMAL 1
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#define max(a, b) ({\
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typeof(a) _a = a;\
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typeof(b) _b = b;\
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_a > _b ? _a : _b; })
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#define min(a, b) ({\
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typeof(a) _a = a;\
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typeof(b) _b = b;\
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_a < _b ? _a : _b; })
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void tty_set_fops(struct dfs_file_ops *fops);
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void console_set_fops(struct dfs_file_ops *fops);
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void mutex_lock(rt_mutex_t mutex);
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void mutex_unlock(rt_mutex_t mutex);
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int __tty_check_change(struct tty_struct *tty, int sig);
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int tty_check_change(struct tty_struct *tty);
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rt_inline struct rt_wqueue *wait_queue_get(struct rt_lwp *lwp, struct tty_struct *tty)
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{
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if (lwp == RT_NULL)
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{
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return &tty->wait_queue;
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}
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return &lwp->wait_queue;
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}
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rt_inline struct rt_wqueue *wait_queue_current_get(struct rt_lwp *lwp, struct tty_struct *tty)
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{
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return wait_queue_get(lwp, tty);
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}
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rt_inline void tty_wakeup_check(struct tty_struct *tty)
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{
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struct rt_wqueue *wq = NULL;
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wq = wait_queue_current_get(tty->foreground, tty);
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rt_wqueue_wakeup(wq, (void*)POLLIN);
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}
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rt_inline int set_bit(int nr,int *addr)
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{
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int mask, retval, level;
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addr += nr >> 5;
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mask = 1 << (nr & 0x1f);
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level = rt_hw_interrupt_disable();
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retval = (mask & *addr) != 0;
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*addr |= mask;
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rt_hw_interrupt_enable(level);
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return retval;
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}
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rt_inline int clear_bit(int nr, int *addr)
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{
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int mask, retval, level;
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addr += nr >> 5;
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mask = 1 << (nr & 0x1f);
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level = rt_hw_interrupt_disable();
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retval = (mask & *addr) != 0;
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*addr &= ~mask;
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rt_hw_interrupt_enable(level);
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return retval;
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}
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rt_inline int test_bit(int nr, int *addr)
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{
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int mask;
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addr += nr >> 5;
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mask = 1 << (nr & 0x1f);
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return ((mask & *addr) != 0);
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}
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rt_inline int test_and_clear_bit(int nr, volatile void *addr)
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{
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int mask, retval, level;
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volatile unsigned int *a = addr;
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a += nr >> 5;
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mask = 1 << (nr & 0x1f);
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level = rt_hw_interrupt_disable();
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retval = (mask & *a) != 0;
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*a &= ~mask;
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rt_hw_interrupt_enable(level);
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return retval;
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}
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rt_inline unsigned long __ffs(unsigned long word)
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{
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int num = 0;
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#if BITS_PER_LONG == 64
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if ((word & 0xffffffff) == 0)
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{
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num += 32;
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word >>= 32;
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}
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#endif
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if ((word & 0xffff) == 0)
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{
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num += 16;
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word >>= 16;
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}
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if ((word & 0xff) == 0)
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{
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num += 8;
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word >>= 8;
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}
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if ((word & 0xf) == 0)
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{
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num += 4;
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word >>= 4;
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}
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if ((word & 0x3) == 0)
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{
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num += 2;
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word >>= 2;
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}
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if ((word & 0x1) == 0)
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{
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num += 1;
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}
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return num;
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}
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#define BITS_PER_LONG 32
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#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG)
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/*
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* Find the next set bit in a memory region.
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*/
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rt_inline unsigned long find_next_bit(const unsigned long *addr, unsigned long size,
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unsigned long offset)
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{
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const unsigned long *p = addr + BITOP_WORD(offset);
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unsigned long result = offset & ~(BITS_PER_LONG-1);
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unsigned long tmp;
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if (offset >= size)
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{
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return size;
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}
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size -= result;
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offset %= BITS_PER_LONG;
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if (offset)
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{
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tmp = *(p++);
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tmp &= (~0UL << offset);
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if (size < BITS_PER_LONG)
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{
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goto found_first;
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}
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if (tmp)
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{
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goto found_middle;
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}
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size -= BITS_PER_LONG;
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result += BITS_PER_LONG;
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}
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while (size & ~(BITS_PER_LONG-1))
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{
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if ((tmp = *(p++)))
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{
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goto found_middle;
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}
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result += BITS_PER_LONG;
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size -= BITS_PER_LONG;
|
|
}
|
|
|
|
if (!size)
|
|
{
|
|
return result;
|
|
}
|
|
|
|
tmp = *p;
|
|
|
|
found_first:
|
|
tmp &= (~0UL >> (BITS_PER_LONG - size));
|
|
if (tmp == 0UL) /* Are any bits set? */
|
|
{
|
|
return result + size; /* Nope. */
|
|
}
|
|
|
|
found_middle:
|
|
return result + __ffs(tmp);
|
|
}
|
|
|
|
/*create by tty_ioctl.c*/
|
|
int n_tty_ioctl_extend(struct tty_struct *tty, int cmd, void *arg);
|
|
|
|
/*create by n_tty.c*/
|
|
void console_ldata_init(struct tty_struct *tty);
|
|
int n_tty_receive_buf(struct tty_struct *tty, char *cp, int count);
|
|
void n_tty_init(void);
|
|
|
|
#endif /*__TTY_H__*/
|