640 lines
22 KiB
Text
640 lines
22 KiB
Text
#
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# Character device configuration
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#
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menu "Character devices"
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source "drivers/tty/Kconfig"
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config DEVMEM
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bool "Memory device driver"
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default y
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help
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The memory driver provides two character devices, mem and kmem, which
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provide access to the system's memory. The mem device is a view of
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physical memory, and each byte in the device corresponds to the
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matching physical address. The kmem device is the same as mem, but
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the addresses correspond to the kernel's virtual address space rather
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than physical memory. These devices are standard parts of a Linux
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system and most users should say Y here. You might say N if very
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security conscience or memory is tight.
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config DEVKMEM
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bool "/dev/kmem virtual device support"
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default y
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help
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Say Y here if you want to support the /dev/kmem device. The
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/dev/kmem device is rarely used, but can be used for certain
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kind of kernel debugging operations.
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When in doubt, say "N".
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config SGI_SNSC
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bool "SGI Altix system controller communication support"
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depends on (IA64_SGI_SN2 || IA64_GENERIC)
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help
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If you have an SGI Altix and you want to enable system
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controller communication from user space (you want this!),
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say Y. Otherwise, say N.
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config SGI_TIOCX
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bool "SGI TIO CX driver support"
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depends on (IA64_SGI_SN2 || IA64_GENERIC)
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help
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If you have an SGI Altix and you have fpga devices attached
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to your TIO, say Y here, otherwise say N.
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config SGI_MBCS
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tristate "SGI FPGA Core Services driver support"
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depends on SGI_TIOCX
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help
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If you have an SGI Altix with an attached SABrick
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say Y or M here, otherwise say N.
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source "drivers/tty/serial/Kconfig"
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source "drivers/char/diag/Kconfig"
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config TTY_PRINTK
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tristate "TTY driver to output user messages via printk"
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depends on EXPERT && TTY
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default n
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---help---
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If you say Y here, the support for writing user messages (i.e.
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console messages) via printk is available.
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The feature is useful to inline user messages with kernel
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messages.
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In order to use this feature, you should output user messages
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to /dev/ttyprintk or redirect console to this TTY.
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If unsure, say N.
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config BFIN_OTP
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tristate "Blackfin On-Chip OTP Memory Support"
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depends on BLACKFIN && (BF51x || BF52x || BF54x)
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default y
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help
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If you say Y here, you will get support for a character device
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interface into the One Time Programmable memory pages that are
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stored on the Blackfin processor. This will not get you access
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to the secure memory pages however. You will need to write your
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own secure code and reader for that.
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To compile this driver as a module, choose M here: the module
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will be called bfin-otp.
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If unsure, it is safe to say Y.
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config BFIN_OTP_WRITE_ENABLE
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bool "Enable writing support of OTP pages"
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depends on BFIN_OTP
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default n
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help
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If you say Y here, you will enable support for writing of the
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OTP pages. This is dangerous by nature as you can only program
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the pages once, so only enable this option when you actually
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need it so as to not inadvertently clobber data.
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If unsure, say N.
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config PRINTER
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tristate "Parallel printer support"
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depends on PARPORT
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---help---
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If you intend to attach a printer to the parallel port of your Linux
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box (as opposed to using a serial printer; if the connector at the
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printer has 9 or 25 holes ["female"], then it's serial), say Y.
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Also read the Printing-HOWTO, available from
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<http://www.tldp.org/docs.html#howto>.
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It is possible to share one parallel port among several devices
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(e.g. printer and ZIP drive) and it is safe to compile the
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corresponding drivers into the kernel.
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To compile this driver as a module, choose M here and read
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<file:Documentation/parport.txt>. The module will be called lp.
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If you have several parallel ports, you can specify which ports to
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use with the "lp" kernel command line option. (Try "man bootparam"
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or see the documentation of your boot loader (lilo or loadlin) about
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how to pass options to the kernel at boot time.) The syntax of the
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"lp" command line option can be found in <file:drivers/char/lp.c>.
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If you have more than 8 printers, you need to increase the LP_NO
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macro in lp.c and the PARPORT_MAX macro in parport.h.
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config LP_CONSOLE
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bool "Support for console on line printer"
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depends on PRINTER
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---help---
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If you want kernel messages to be printed out as they occur, you
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can have a console on the printer. This option adds support for
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doing that; to actually get it to happen you need to pass the
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option "console=lp0" to the kernel at boot time.
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If the printer is out of paper (or off, or unplugged, or too
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busy..) the kernel will stall until the printer is ready again.
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By defining CONSOLE_LP_STRICT to 0 (at your own risk) you
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can make the kernel continue when this happens,
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but it'll lose the kernel messages.
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If unsure, say N.
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config PPDEV
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tristate "Support for user-space parallel port device drivers"
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depends on PARPORT
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---help---
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Saying Y to this adds support for /dev/parport device nodes. This
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is needed for programs that want portable access to the parallel
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port, for instance deviceid (which displays Plug-and-Play device
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IDs).
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This is the parallel port equivalent of SCSI generic support (sg).
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It is safe to say N to this -- it is not needed for normal printing
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or parallel port CD-ROM/disk support.
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To compile this driver as a module, choose M here: the
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module will be called ppdev.
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If unsure, say N.
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source "drivers/tty/hvc/Kconfig"
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config VIRTIO_CONSOLE
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tristate "Virtio console"
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depends on VIRTIO && TTY
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select HVC_DRIVER
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help
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Virtio console for use with lguest and other hypervisors.
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Also serves as a general-purpose serial device for data
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transfer between the guest and host. Character devices at
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/dev/vportNpn will be created when corresponding ports are
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found, where N is the device number and n is the port number
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within that device. If specified by the host, a sysfs
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attribute called 'name' will be populated with a name for
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the port which can be used by udev scripts to create a
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symlink to the device.
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config IBM_BSR
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tristate "IBM POWER Barrier Synchronization Register support"
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depends on PPC_PSERIES
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help
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This devices exposes a hardware mechanism for fast synchronization
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of threads across a large system which avoids bouncing a cacheline
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between several cores on a system
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source "drivers/char/ipmi/Kconfig"
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config DS1620
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tristate "NetWinder thermometer support"
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depends on ARCH_NETWINDER
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help
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Say Y here to include support for the thermal management hardware
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found in the NetWinder. This driver allows the user to control the
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temperature set points and to read the current temperature.
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It is also possible to say M here to build it as a module (ds1620)
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It is recommended to be used on a NetWinder, but it is not a
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necessity.
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config NWBUTTON
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tristate "NetWinder Button"
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depends on ARCH_NETWINDER
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---help---
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If you say Y here and create a character device node /dev/nwbutton
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with major and minor numbers 10 and 158 ("man mknod"), then every
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time the orange button is pressed a number of times, the number of
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times the button was pressed will be written to that device.
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This is most useful for applications, as yet unwritten, which
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perform actions based on how many times the button is pressed in a
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row.
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Do not hold the button down for too long, as the driver does not
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alter the behaviour of the hardware reset circuitry attached to the
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button; it will still execute a hard reset if the button is held
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down for longer than approximately five seconds.
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To compile this driver as a module, choose M here: the
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module will be called nwbutton.
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Most people will answer Y to this question and "Reboot Using Button"
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below to be able to initiate a system shutdown from the button.
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config NWBUTTON_REBOOT
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bool "Reboot Using Button"
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depends on NWBUTTON
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help
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If you say Y here, then you will be able to initiate a system
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shutdown and reboot by pressing the orange button a number of times.
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The number of presses to initiate the shutdown is two by default,
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but this can be altered by modifying the value of NUM_PRESSES_REBOOT
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in nwbutton.h and recompiling the driver or, if you compile the
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driver as a module, you can specify the number of presses at load
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time with "insmod button reboot_count=<something>".
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config NWFLASH
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tristate "NetWinder flash support"
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depends on ARCH_NETWINDER
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---help---
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If you say Y here and create a character device /dev/flash with
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major 10 and minor 160 you can manipulate the flash ROM containing
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the NetWinder firmware. Be careful as accidentally overwriting the
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flash contents can render your computer unbootable. On no account
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allow random users access to this device. :-)
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To compile this driver as a module, choose M here: the
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module will be called nwflash.
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If you're not sure, say N.
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source "drivers/char/hw_random/Kconfig"
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config NVRAM
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tristate "/dev/nvram support"
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depends on ATARI || X86 || (ARM && RTC_DRV_CMOS) || GENERIC_NVRAM
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---help---
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If you say Y here and create a character special file /dev/nvram
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with major number 10 and minor number 144 using mknod ("man mknod"),
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you get read and write access to the extra bytes of non-volatile
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memory in the real time clock (RTC), which is contained in every PC
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and most Ataris. The actual number of bytes varies, depending on the
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nvram in the system, but is usually 114 (128-14 for the RTC).
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This memory is conventionally called "CMOS RAM" on PCs and "NVRAM"
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on Ataris. /dev/nvram may be used to view settings there, or to
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change them (with some utility). It could also be used to frequently
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save a few bits of very important data that may not be lost over
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power-off and for which writing to disk is too insecure. Note
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however that most NVRAM space in a PC belongs to the BIOS and you
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should NEVER idly tamper with it. See Ralf Brown's interrupt list
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for a guide to the use of CMOS bytes by your BIOS.
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On Atari machines, /dev/nvram is always configured and does not need
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to be selected.
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To compile this driver as a module, choose M here: the
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module will be called nvram.
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#
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# These legacy RTC drivers just cause too many conflicts with the generic
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# RTC framework ... let's not even try to coexist any more.
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#
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if RTC_LIB=n
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config RTC
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tristate "Enhanced Real Time Clock Support (legacy PC RTC driver)"
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depends on !PPC && !PARISC && !IA64 && !M68K && !SPARC && !FRV \
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&& !ARM && !SUPERH && !S390 && !AVR32 && !BLACKFIN && !UML
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---help---
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If you say Y here and create a character special file /dev/rtc with
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major number 10 and minor number 135 using mknod ("man mknod"), you
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will get access to the real time clock (or hardware clock) built
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into your computer.
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Every PC has such a clock built in. It can be used to generate
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signals from as low as 1Hz up to 8192Hz, and can also be used
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as a 24 hour alarm. It reports status information via the file
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/proc/driver/rtc and its behaviour is set by various ioctls on
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/dev/rtc.
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If you run Linux on a multiprocessor machine and said Y to
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"Symmetric Multi Processing" above, you should say Y here to read
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and set the RTC in an SMP compatible fashion.
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If you think you have a use for such a device (such as periodic data
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sampling), then say Y here, and read <file:Documentation/rtc.txt>
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for details.
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To compile this driver as a module, choose M here: the
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module will be called rtc.
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config JS_RTC
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tristate "Enhanced Real Time Clock Support"
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depends on SPARC32 && PCI
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---help---
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If you say Y here and create a character special file /dev/rtc with
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major number 10 and minor number 135 using mknod ("man mknod"), you
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will get access to the real time clock (or hardware clock) built
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into your computer.
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Every PC has such a clock built in. It can be used to generate
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signals from as low as 1Hz up to 8192Hz, and can also be used
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as a 24 hour alarm. It reports status information via the file
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/proc/driver/rtc and its behaviour is set by various ioctls on
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/dev/rtc.
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If you think you have a use for such a device (such as periodic data
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sampling), then say Y here, and read <file:Documentation/rtc.txt>
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for details.
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To compile this driver as a module, choose M here: the
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module will be called js-rtc.
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config GEN_RTC
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tristate "Generic /dev/rtc emulation"
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depends on RTC!=y && !IA64 && !ARM && !M32R && !MIPS && !SPARC && !FRV && !S390 && !SUPERH && !AVR32 && !BLACKFIN && !UML
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---help---
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If you say Y here and create a character special file /dev/rtc with
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major number 10 and minor number 135 using mknod ("man mknod"), you
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will get access to the real time clock (or hardware clock) built
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into your computer.
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It reports status information via the file /proc/driver/rtc and its
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behaviour is set by various ioctls on /dev/rtc. If you enable the
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"extended RTC operation" below it will also provide an emulation
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for RTC_UIE which is required by some programs and may improve
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precision in some cases.
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To compile this driver as a module, choose M here: the
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module will be called genrtc.
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config GEN_RTC_X
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bool "Extended RTC operation"
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depends on GEN_RTC
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help
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Provides an emulation for RTC_UIE which is required by some programs
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and may improve precision of the generic RTC support in some cases.
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config EFI_RTC
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bool "EFI Real Time Clock Services"
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depends on IA64
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config DS1302
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tristate "DS1302 RTC support"
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depends on M32R && (PLAT_M32700UT || PLAT_OPSPUT)
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help
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If you say Y here and create a character special file /dev/rtc with
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major number 121 and minor number 0 using mknod ("man mknod"), you
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will get access to the real time clock (or hardware clock) built
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into your computer.
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endif # RTC_LIB
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config DTLK
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tristate "Double Talk PC internal speech card support"
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depends on ISA
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help
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This driver is for the DoubleTalk PC, a speech synthesizer
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manufactured by RC Systems (<http://www.rcsys.com/>). It is also
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called the `internal DoubleTalk'.
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To compile this driver as a module, choose M here: the
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module will be called dtlk.
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config XILINX_HWICAP
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tristate "Xilinx HWICAP Support"
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depends on XILINX_VIRTEX || MICROBLAZE
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help
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This option enables support for Xilinx Internal Configuration
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Access Port (ICAP) driver. The ICAP is used on Xilinx Virtex
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FPGA platforms to partially reconfigure the FPGA at runtime.
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If unsure, say N.
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config R3964
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tristate "Siemens R3964 line discipline"
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depends on TTY
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---help---
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This driver allows synchronous communication with devices using the
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Siemens R3964 packet protocol. Unless you are dealing with special
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hardware like PLCs, you are unlikely to need this.
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To compile this driver as a module, choose M here: the
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module will be called n_r3964.
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If unsure, say N.
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config APPLICOM
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tristate "Applicom intelligent fieldbus card support"
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depends on PCI
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---help---
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This driver provides the kernel-side support for the intelligent
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fieldbus cards made by Applicom International. More information
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about these cards can be found on the WWW at the address
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<http://www.applicom-int.com/>, or by email from David Woodhouse
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<dwmw2@infradead.org>.
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To compile this driver as a module, choose M here: the
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module will be called applicom.
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If unsure, say N.
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config SONYPI
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tristate "Sony Vaio Programmable I/O Control Device support"
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depends on X86_32 && PCI && INPUT
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---help---
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This driver enables access to the Sony Programmable I/O Control
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Device which can be found in many (all ?) Sony Vaio laptops.
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If you have one of those laptops, read
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<file:Documentation/laptops/sonypi.txt>, and say Y or M here.
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To compile this driver as a module, choose M here: the
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module will be called sonypi.
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config GPIO_TB0219
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tristate "TANBAC TB0219 GPIO support"
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depends on TANBAC_TB022X
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select GPIO_VR41XX
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source "drivers/char/pcmcia/Kconfig"
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config MWAVE
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tristate "ACP Modem (Mwave) support"
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depends on X86 && TTY
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select SERIAL_8250
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---help---
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The ACP modem (Mwave) for Linux is a WinModem. It is composed of a
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kernel driver and a user level application. Together these components
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support direct attachment to public switched telephone networks (PSTNs)
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and support selected world wide countries.
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This version of the ACP Modem driver supports the IBM Thinkpad 600E,
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600, and 770 that include on board ACP modem hardware.
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The modem also supports the standard communications port interface
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(ttySx) and is compatible with the Hayes AT Command Set.
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The user level application needed to use this driver can be found at
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the IBM Linux Technology Center (LTC) web site:
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<http://www.ibm.com/linux/ltc/>.
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If you own one of the above IBM Thinkpads which has the Mwave chipset
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in it, say Y.
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To compile this driver as a module, choose M here: the
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module will be called mwave.
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config SCx200_GPIO
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tristate "NatSemi SCx200 GPIO Support"
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depends on SCx200
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select NSC_GPIO
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help
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Give userspace access to the GPIO pins on the National
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Semiconductor SCx200 processors.
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If compiled as a module, it will be called scx200_gpio.
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config PC8736x_GPIO
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tristate "NatSemi PC8736x GPIO Support"
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depends on X86_32 && !UML
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default SCx200_GPIO # mostly N
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select NSC_GPIO # needed for support routines
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help
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Give userspace access to the GPIO pins on the National
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Semiconductor PC-8736x (x=[03456]) SuperIO chip. The chip
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has multiple functional units, inc several managed by
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hwmon/pc87360 driver. Tested with PC-87366
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If compiled as a module, it will be called pc8736x_gpio.
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config NSC_GPIO
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tristate "NatSemi Base GPIO Support"
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depends on X86_32
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# selected by SCx200_GPIO and PC8736x_GPIO
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# what about 2 selectors differing: m != y
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help
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Common support used (and needed) by scx200_gpio and
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pc8736x_gpio drivers. If those drivers are built as
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modules, this one will be too, named nsc_gpio
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config RAW_DRIVER
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tristate "RAW driver (/dev/raw/rawN)"
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|
depends on BLOCK
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|
help
|
|
The raw driver permits block devices to be bound to /dev/raw/rawN.
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|
Once bound, I/O against /dev/raw/rawN uses efficient zero-copy I/O.
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|
See the raw(8) manpage for more details.
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|
Applications should preferably open the device (eg /dev/hda1)
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|
with the O_DIRECT flag.
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|
config MAX_RAW_DEVS
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|
int "Maximum number of RAW devices to support (1-65536)"
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|
depends on RAW_DRIVER
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|
range 1 65536
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|
default "256"
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|
help
|
|
The maximum number of RAW devices that are supported.
|
|
Default is 256. Increase this number in case you need lots of
|
|
raw devices.
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|
|
config HPET
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|
bool "HPET - High Precision Event Timer" if (X86 || IA64)
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|
default n
|
|
depends on ACPI
|
|
help
|
|
If you say Y here, you will have a miscdevice named "/dev/hpet/". Each
|
|
open selects one of the timers supported by the HPET. The timers are
|
|
non-periodic and/or periodic.
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|
|
|
config HPET_MMAP
|
|
bool "Allow mmap of HPET"
|
|
default y
|
|
depends on HPET
|
|
help
|
|
If you say Y here, user applications will be able to mmap
|
|
the HPET registers.
|
|
|
|
config HPET_MMAP_DEFAULT
|
|
bool "Enable HPET MMAP access by default"
|
|
default y
|
|
depends on HPET_MMAP
|
|
help
|
|
In some hardware implementations, the page containing HPET
|
|
registers may also contain other things that shouldn't be
|
|
exposed to the user. This option selects the default (if
|
|
kernel parameter hpet_mmap is not set) user access to the
|
|
registers for applications that require it.
|
|
|
|
config HANGCHECK_TIMER
|
|
tristate "Hangcheck timer"
|
|
depends on X86 || IA64 || PPC64 || S390
|
|
help
|
|
The hangcheck-timer module detects when the system has gone
|
|
out to lunch past a certain margin. It can reboot the system
|
|
or merely print a warning.
|
|
|
|
config MMTIMER
|
|
tristate "MMTIMER Memory mapped RTC for SGI Altix"
|
|
depends on IA64_GENERIC || IA64_SGI_SN2
|
|
default y
|
|
help
|
|
The mmtimer device allows direct userspace access to the
|
|
Altix system timer.
|
|
|
|
config UV_MMTIMER
|
|
tristate "UV_MMTIMER Memory mapped RTC for SGI UV"
|
|
depends on X86_UV
|
|
default m
|
|
help
|
|
The uv_mmtimer device allows direct userspace access to the
|
|
UV system timer.
|
|
|
|
source "drivers/char/tpm/Kconfig"
|
|
|
|
config TELCLOCK
|
|
tristate "Telecom clock driver for ATCA SBC"
|
|
depends on X86
|
|
default n
|
|
help
|
|
The telecom clock device is specific to the MPCBL0010 and MPCBL0050
|
|
ATCA computers and allows direct userspace access to the
|
|
configuration of the telecom clock configuration settings. This
|
|
device is used for hardware synchronization across the ATCA backplane
|
|
fabric. Upon loading, the driver exports a sysfs directory,
|
|
/sys/devices/platform/telco_clock, with a number of files for
|
|
controlling the behavior of this hardware.
|
|
|
|
config DEVPORT
|
|
bool
|
|
depends on !M68K
|
|
depends on ISA || PCI
|
|
default y
|
|
|
|
config DCC_TTY
|
|
tristate "DCC tty driver"
|
|
depends on ARM
|
|
|
|
source "drivers/s390/char/Kconfig"
|
|
|
|
config MSM_SMD_PKT
|
|
bool "Enable device interface for some SMD packet ports"
|
|
default n
|
|
depends on MSM_SMD
|
|
help
|
|
Enables userspace clients to read and write to some packet SMD
|
|
ports via device interface for MSM chipset.
|
|
|
|
config TILE_SROM
|
|
bool "Character-device access via hypervisor to the Tilera SPI ROM"
|
|
depends on TILE
|
|
default y
|
|
---help---
|
|
This device provides character-level read-write access
|
|
to the SROM, typically via the "0", "1", and "2" devices
|
|
in /dev/srom/. The Tilera hypervisor makes the flash
|
|
device appear much like a simple EEPROM, and knows
|
|
how to partition a single ROM for multiple purposes.
|
|
|
|
source "drivers/char/xillybus/Kconfig"
|
|
|
|
config MSM_ADSPRPC
|
|
tristate "Qualcomm ADSP RPC driver"
|
|
depends on MSM_SMD
|
|
help
|
|
Provides a communication mechanism that allows for clients to
|
|
make remote method invocations across processor boundary to
|
|
applications DSP processor. Say M if you want to enable this
|
|
module.
|
|
|
|
config MSM_RDBG
|
|
tristate "Qualcomm Remote debug driver"
|
|
help
|
|
Implements a shared memory based transport mechanism that allows
|
|
for a debugger running on a host PC to communicate with a remote
|
|
stub running on peripheral subsystems such as the ADSP, MODEM etc.
|
|
endmenu
|
|
|