tty: move Kconfig entries into drivers/tty from drivers/char

The Kconfig options for the drivers/tty/ files still were hanging around
in the "big" drivers/char/Kconfig file, so move them to the proper
location under drivers/tty and drivers/tty/hvc/

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 150 insertions, 0 deletions

diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig
new file mode 100644
index 000000000000..9cfbdb318ed9
--- /dev/null
+++ b/drivers/tty/Kconfig
@@ -0,0 +1,150 @@
+config VT
+        bool "Virtual terminal" if EXPERT
+        depends on !S390
+        select INPUT
+        default y
+        ---help---
+          If you say Y here, you will get support for terminal devices with
+          display and keyboard devices. These are called "virtual" because you
+          can run several virtual terminals (also called virtual consoles) on
+          one physical terminal. This is rather useful, for example one
+          virtual terminal can collect system messages and warnings, another
+          one can be used for a text-mode user session, and a third could run
+          an X session, all in parallel. Switching between virtual terminals
+          is done with certain key combinations, usually Alt-<function key>.
+
+          The setterm command ("man setterm") can be used to change the
+          properties (such as colors or beeping) of a virtual terminal. The
+          man page console_codes(4) ("man console_codes") contains the special
+          character sequences that can be used to change those properties
+          directly. The fonts used on virtual terminals can be changed with
+          the setfont ("man setfont") command and the key bindings are defined
+          with the loadkeys ("man loadkeys") command.
+
+          You need at least one virtual terminal device in order to make use
+          of your keyboard and monitor. Therefore, only people configuring an
+          embedded system would want to say N here in order to save some
+          memory; the only way to log into such a system is then via a serial
+          or network connection.
+
+          If unsure, say Y, or else you won't be able to do much with your new
+          shiny Linux system :-)
+
+config CONSOLE_TRANSLATIONS
+        depends on VT
+        default y
+        bool "Enable character translations in console" if EXPERT
+        ---help---
+          This enables support for font mapping and Unicode translation
+          on virtual consoles.
+
+config VT_CONSOLE
+        bool "Support for console on virtual terminal" if EXPERT
+        depends on VT
+        default y
+        ---help---
+          The system console is the device which receives all kernel messages
+          and warnings and which allows logins in single user mode. If you
+          answer Y here, a virtual terminal (the device used to interact with
+          a physical terminal) can be used as system console. This is the most
+          common mode of operations, so you should say Y here unless you want
+          the kernel messages be output only to a serial port (in which case
+          you should say Y to "Console on serial port", below).
+
+          If you do say Y here, by default the currently visible virtual
+          terminal (/dev/tty0) will be used as system console. You can change
+          that with a kernel command line option such as "console=tty3" which
+          would use the third virtual terminal as system console. (Try "man
+          bootparam" or see the documentation of your boot loader (lilo or
+          loadlin) about how to pass options to the kernel at boot time.)
+
+          If unsure, say Y.
+
+config HW_CONSOLE
+        bool
+        depends on VT && !S390 && !UML
+        default y
+
+config VT_HW_CONSOLE_BINDING
+       bool "Support for binding and unbinding console drivers"
+       depends on HW_CONSOLE
+       default n
+       ---help---
+         The virtual terminal is the device that interacts with the physical
+         terminal through console drivers. On these systems, at least one
+         console driver is loaded. In other configurations, additional console
+         drivers may be enabled, such as the framebuffer console. If more than
+         1 console driver is enabled, setting this to 'y' will allow you to
+         select the console driver that will serve as the backend for the
+         virtual terminals.
+
+         See <file:Documentation/console/console.txt> for more
+         information. For framebuffer console users, please refer to
+         <file:Documentation/fb/fbcon.txt>.
+
+config UNIX98_PTYS
+        bool "Unix98 PTY support" if EXPERT
+        default y
+        ---help---
+          A pseudo terminal (PTY) is a software device consisting of two
+          halves: a master and a slave. The slave device behaves identical to
+          a physical terminal; the master device is used by a process to
+          read data from and write data to the slave, thereby emulating a
+          terminal. Typical programs for the master side are telnet servers
+          and xterms.
+
+          Linux has traditionally used the BSD-like names /dev/ptyxx for
+          masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
+          has a number of problems. The GNU C library glibc 2.1 and later,
+          however, supports the Unix98 naming standard: in order to acquire a
+          pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
+          terminal is then made available to the process and the pseudo
+          terminal slave can be accessed as /dev/pts/<number>. What was
+          traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
+
+          All modern Linux systems use the Unix98 ptys.  Say Y unless
+          you're on an embedded system and want to conserve memory.
+
+config DEVPTS_MULTIPLE_INSTANCES
+        bool "Support multiple instances of devpts"
+        depends on UNIX98_PTYS
+        default n
+        ---help---
+          Enable support for multiple instances of devpts filesystem.
+          If you want to have isolated PTY namespaces (eg: in containers),
+          say Y here.  Otherwise, say N. If enabled, each mount of devpts
+          filesystem with the '-o newinstance' option will create an
+          independent PTY namespace.
+
+config LEGACY_PTYS
+        bool "Legacy (BSD) PTY support"
+        default y
+        ---help---
+          A pseudo terminal (PTY) is a software device consisting of two
+          halves: a master and a slave. The slave device behaves identical to
+          a physical terminal; the master device is used by a process to
+          read data from and write data to the slave, thereby emulating a
+          terminal. Typical programs for the master side are telnet servers
+          and xterms.
+
+          Linux has traditionally used the BSD-like names /dev/ptyxx
+          for masters and /dev/ttyxx for slaves of pseudo
+          terminals. This scheme has a number of problems, including
+          security.  This option enables these legacy devices; on most
+          systems, it is safe to say N.
+
+
+config LEGACY_PTY_COUNT
+        int "Maximum number of legacy PTY in use"
+        depends on LEGACY_PTYS
+        range 0 256
+        default "256"
+        ---help---
+          The maximum number of legacy PTYs that can be used at any one time.
+          The default is 256, and should be more than enough.  Embedded
+          systems may want to reduce this to save memory.
+
+          When not in use, each legacy PTY occupies 12 bytes on 32-bit
+          architectures and 24 bytes on 64-bit architectures.
+
+