linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 *  Copyright (C) 1991, 1992  Linus Torvalds

 */

​

/*

 * 'tty_io.c' gives an orthogonal feeling to tty's, be they consoles

 * or rs-channels. It also implements echoing, cooked mode etc.

 *

 * Kill-line thanks to John T Kohl, who also corrected VMIN = VTIME = 0.

 *

 * Modified by Theodore Ts'o, 9/14/92, to dynamically allocate the

 * tty_struct and tty_queue structures.  Previously there was an array

 * of 256 tty_struct's which was statically allocated, and the

 * tty_queue structures were allocated at boot time.  Both are now

 * dynamically allocated only when the tty is open.

 *

 * Also restructured routines so that there is more of a separation

 * between the high-level tty routines (tty_io.c and tty_ioctl.c) and

 * the low-level tty routines (serial.c, pty.c, console.c).  This

 * makes for cleaner and more compact code.  -TYT, 9/17/92

 *

 * Modified by Fred N. van Kempen, 01/29/93, to add line disciplines

 * which can be dynamically activated and de-activated by the line

 * discipline handling modules (like SLIP).

 *

 * NOTE: pay no attention to the line discipline code (yet); its

 * interface is still subject to change in this version...

 * -- TYT, 1/31/92

 *

 * Added functionality to the OPOST tty handling.  No delays, but all

 * other bits should be there.

 *  -- Nick Holloway <alfie@dcs.warwick.ac.uk>, 27th May 1993.

 *

 * Rewrote canonical mode and added more termios flags.

 *  -- julian@uhunix.uhcc.hawaii.edu (J. Cowley), 13Jan94

 *

 * Reorganized FASYNC support so mouse code can share it.

 *  -- ctm@ardi.com, 9Sep95

 *

 * New TIOCLINUX variants added.

 *  -- mj@k332.feld.cvut.cz, 19-Nov-95

 *

 * Restrict vt switching via ioctl()

 *      -- grif@cs.ucr.edu, 5-Dec-95

 *

 * Move console and virtual terminal code to more appropriate files,

 * implement CONFIG_VT and generalize console device interface.

 *  -- Marko Kohtala <Marko.Kohtala@hut.fi>, March 97

 *

 * Rewrote tty_init_dev and tty_release_dev to eliminate races.

 *  -- Bill Hawes <whawes@star.net>, June 97

 *

 * Added devfs support.

 *      -- C. Scott Ananian <cananian@alumni.princeton.edu>, 13-Jan-1998

 *

 * Added support for a Unix98-style ptmx device.

 *      -- C. Scott Ananian <cananian@alumni.princeton.edu>, 14-Jan-1998

 *

 * Reduced memory usage for older ARM systems

 *      -- Russell King <rmk@arm.linux.org.uk>

 *

 * Move do_SAK() into process context.  Less stack use in devfs functions.

 * alloc_tty_struct() always uses kmalloc()

 *           -- Andrew Morton <andrewm@uow.edu.eu> 17Mar01

 */

​

#include <linux/types.h>

#include <linux/major.h>

#include <linux/errno.h>

#include <linux/signal.h>

#include <linux/fcntl.h>

#include <linux/sched/signal.h>

#include <linux/sched/task.h>

#include <linux/interrupt.h>

#include <linux/tty.h>

#include <linux/tty_driver.h>

#include <linux/tty_flip.h>

#include <linux/devpts_fs.h>

#include <linux/file.h>

#include <linux/fdtable.h>

#include <linux/console.h>

#include <linux/timer.h>

#include <linux/ctype.h>

#include <linux/kd.h>

#include <linux/mm.h>

#include <linux/string.h>

#include <linux/slab.h>

#include <linux/poll.h>

#include <linux/proc_fs.h>

#include <linux/init.h>

#include <linux/module.h>