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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
tty: tty_driver: move TTY macros to the top
So that they can be referenced in structs once converted to enums (in
the next patches).
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20250317070046.24386-13-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
authored by
Jiri Slaby (SUSE)
and committed by
Greg Kroah-Hartman
67acbcc3
f812af36
+78
-78
+78
-78
include/linux/tty_driver.h
+78
-78
include/linux/tty_driver.h
···
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struct serial_struct;
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/**
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* DOC: TTY Driver Flags
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*
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* TTY_DRIVER_RESET_TERMIOS
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* Requests the tty layer to reset the termios setting when the last
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* process has closed the device. Used for PTYs, in particular.
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*
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* TTY_DRIVER_REAL_RAW
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* Indicates that the driver will guarantee not to set any special
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* character handling flags if this is set for the tty:
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*
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* ``(IGNBRK || (!BRKINT && !PARMRK)) && (IGNPAR || !INPCK)``
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*
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* That is, if there is no reason for the driver to
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* send notifications of parity and break characters up to the line
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* driver, it won't do so. This allows the line driver to optimize for
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* this case if this flag is set. (Note that there is also a promise, if
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* the above case is true, not to signal overruns, either.)
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*
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* TTY_DRIVER_DYNAMIC_DEV
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* The individual tty devices need to be registered with a call to
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* tty_register_device() when the device is found in the system and
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* unregistered with a call to tty_unregister_device() so the devices will
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* be show up properly in sysfs. If not set, all &tty_driver.num entries
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* will be created by the tty core in sysfs when tty_register_driver() is
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* called. This is to be used by drivers that have tty devices that can
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* appear and disappear while the main tty driver is registered with the
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* tty core.
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*
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* TTY_DRIVER_DEVPTS_MEM
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* Don't use the standard arrays (&tty_driver.ttys and
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* &tty_driver.termios), instead use dynamic memory keyed through the
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* devpts filesystem. This is only applicable to the PTY driver.
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*
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* TTY_DRIVER_HARDWARE_BREAK
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* Hardware handles break signals. Pass the requested timeout to the
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* &tty_operations.break_ctl instead of using a simple on/off interface.
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*
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* TTY_DRIVER_DYNAMIC_ALLOC
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* Do not allocate structures which are needed per line for this driver
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* (&tty_driver.ports) as it would waste memory. The driver will take
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* care. This is only applicable to the PTY driver.
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*
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* TTY_DRIVER_UNNUMBERED_NODE
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* Do not create numbered ``/dev`` nodes. For example, create
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* ``/dev/ttyprintk`` and not ``/dev/ttyprintk0``. Applicable only when a
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* driver for a single tty device is being allocated.
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*/
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#define TTY_DRIVER_INSTALLED 0x0001
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#define TTY_DRIVER_RESET_TERMIOS 0x0002
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#define TTY_DRIVER_REAL_RAW 0x0004
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#define TTY_DRIVER_DYNAMIC_DEV 0x0008
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#define TTY_DRIVER_DEVPTS_MEM 0x0010
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#define TTY_DRIVER_HARDWARE_BREAK 0x0020
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#define TTY_DRIVER_DYNAMIC_ALLOC 0x0040
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#define TTY_DRIVER_UNNUMBERED_NODE 0x0080
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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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/* system subtypes (magic, used by tty_io.c) */
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#define SYSTEM_TYPE_TTY 0x0001
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#define SYSTEM_TYPE_CONSOLE 0x0002
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#define SYSTEM_TYPE_SYSCONS 0x0003
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#define SYSTEM_TYPE_SYSPTMX 0x0004
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/* pty subtypes (magic, used by tty_io.c) */
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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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/**
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* struct tty_operations -- interface between driver and tty
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*
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* @lookup: ``struct tty_struct *()(struct tty_driver *self, struct file *,
···
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{
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driver->ops = op;
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}
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-
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/**
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* DOC: TTY Driver Flags
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*
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* TTY_DRIVER_RESET_TERMIOS
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* Requests the tty layer to reset the termios setting when the last
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* process has closed the device. Used for PTYs, in particular.
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*
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* TTY_DRIVER_REAL_RAW
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* Indicates that the driver will guarantee not to set any special
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* character handling flags if this is set for the tty:
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*
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* ``(IGNBRK || (!BRKINT && !PARMRK)) && (IGNPAR || !INPCK)``
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*
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* That is, if there is no reason for the driver to
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* send notifications of parity and break characters up to the line
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* driver, it won't do so. This allows the line driver to optimize for
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* this case if this flag is set. (Note that there is also a promise, if
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* the above case is true, not to signal overruns, either.)
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*
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* TTY_DRIVER_DYNAMIC_DEV
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* The individual tty devices need to be registered with a call to
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* tty_register_device() when the device is found in the system and
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* unregistered with a call to tty_unregister_device() so the devices will
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* be show up properly in sysfs. If not set, all &tty_driver.num entries
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* will be created by the tty core in sysfs when tty_register_driver() is
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* called. This is to be used by drivers that have tty devices that can
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* appear and disappear while the main tty driver is registered with the
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* tty core.
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*
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* TTY_DRIVER_DEVPTS_MEM
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* Don't use the standard arrays (&tty_driver.ttys and
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* &tty_driver.termios), instead use dynamic memory keyed through the
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* devpts filesystem. This is only applicable to the PTY driver.
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*
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* TTY_DRIVER_HARDWARE_BREAK
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* Hardware handles break signals. Pass the requested timeout to the
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* &tty_operations.break_ctl instead of using a simple on/off interface.
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-
*
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* TTY_DRIVER_DYNAMIC_ALLOC
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* Do not allocate structures which are needed per line for this driver
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* (&tty_driver.ports) as it would waste memory. The driver will take
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* care. This is only applicable to the PTY driver.
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*
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* TTY_DRIVER_UNNUMBERED_NODE
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* Do not create numbered ``/dev`` nodes. For example, create
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* ``/dev/ttyprintk`` and not ``/dev/ttyprintk0``. Applicable only when a
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* driver for a single tty device is being allocated.
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*/
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#define TTY_DRIVER_INSTALLED 0x0001
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#define TTY_DRIVER_RESET_TERMIOS 0x0002
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#define TTY_DRIVER_REAL_RAW 0x0004
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#define TTY_DRIVER_DYNAMIC_DEV 0x0008
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#define TTY_DRIVER_DEVPTS_MEM 0x0010
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#define TTY_DRIVER_HARDWARE_BREAK 0x0020
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#define TTY_DRIVER_DYNAMIC_ALLOC 0x0040
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#define TTY_DRIVER_UNNUMBERED_NODE 0x0080
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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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/* system subtypes (magic, used by tty_io.c) */
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#define SYSTEM_TYPE_TTY 0x0001
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#define SYSTEM_TYPE_CONSOLE 0x0002
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#define SYSTEM_TYPE_SYSCONS 0x0003
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#define SYSTEM_TYPE_SYSPTMX 0x0004
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/* pty subtypes (magic, used by tty_io.c) */
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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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int tty_register_driver(struct tty_driver *driver);
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void tty_unregister_driver(struct tty_driver *driver);