linux/drivers/auxdisplay/Kconfig
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   1#
   2# For a description of the syntax of this configuration file,
   3# see Documentation/kbuild/kconfig-language.txt.
   4#
   5# Auxiliary display drivers configuration.
   6#
   7
   8menuconfig AUXDISPLAY
   9        bool "Auxiliary Display support"
  10        ---help---
  11          Say Y here to get to see options for auxiliary display drivers.
  12          This option alone does not add any kernel code.
  13
  14          If you say N, all options in this submenu will be skipped and disabled.
  15
  16if AUXDISPLAY
  17
  18config KS0108
  19        tristate "KS0108 LCD Controller"
  20        depends on PARPORT_PC
  21        default n
  22        ---help---
  23          If you have a LCD controlled by one or more KS0108
  24          controllers, say Y. You will need also another more specific
  25          driver for your LCD.
  26
  27          Depends on Parallel Port support. If you say Y at
  28          parport, you will be able to compile this as a module (M)
  29          and built-in as well (Y).
  30
  31          To compile this as a module, choose M here:
  32          the module will be called ks0108.
  33
  34          If unsure, say N.
  35
  36config KS0108_PORT
  37        hex "Parallel port where the LCD is connected"
  38        depends on KS0108
  39        default 0x378
  40        ---help---
  41          The address of the parallel port where the LCD is connected.
  42
  43          The first  standard parallel port address is 0x378.
  44          The second standard parallel port address is 0x278.
  45          The third  standard parallel port address is 0x3BC.
  46
  47          You can specify a different address if you need.
  48
  49          If you don't know what I'm talking about, load the parport module,
  50          and execute "dmesg" or "cat /proc/ioports". You can see there how
  51          many parallel ports are present and which address each one has.
  52
  53          Usually you only need to use 0x378.
  54
  55          If you compile this as a module, you can still override this
  56          using the module parameters.
  57
  58config KS0108_DELAY
  59        int "Delay between each control writing (microseconds)"
  60        depends on KS0108
  61        default "2"
  62        ---help---
  63          Amount of time the ks0108 should wait between each control write
  64          to the parallel port.
  65
  66          If your LCD seems to miss random writings, increment this.
  67
  68          If you don't know what I'm talking about, ignore it.
  69
  70          If you compile this as a module, you can still override this
  71          value using the module parameters.
  72
  73config CFAG12864B
  74        tristate "CFAG12864B LCD"
  75        depends on X86
  76        depends on FB
  77        depends on KS0108
  78        select FB_SYS_FILLRECT
  79        select FB_SYS_COPYAREA
  80        select FB_SYS_IMAGEBLIT
  81        select FB_SYS_FOPS
  82        default n
  83        ---help---
  84          If you have a Crystalfontz 128x64 2-color LCD, cfag12864b Series,
  85          say Y. You also need the ks0108 LCD Controller driver.
  86
  87          For help about how to wire your LCD to the parallel port,
  88          check Documentation/auxdisplay/cfag12864b
  89
  90          Depends on the x86 arch and the framebuffer support.
  91
  92          The LCD framebuffer driver can be attached to a console.
  93          It will work fine. However, you can't attach it to the fbdev driver
  94          of the xorg server.
  95
  96          To compile this as a module, choose M here:
  97          the modules will be called cfag12864b and cfag12864bfb.
  98
  99          If unsure, say N.
 100
 101config CFAG12864B_RATE
 102       int "Refresh rate (hertz)"
 103        depends on CFAG12864B
 104        default "20"
 105        ---help---
 106          Refresh rate of the LCD.
 107
 108          As the LCD is not memory mapped, the driver has to make the work by
 109          software. This means you should be careful setting this value higher.
 110          If your CPUs are really slow or you feel the system is slowed down,
 111          decrease the value.
 112
 113          Be careful modifying this value to a very high value:
 114          You can freeze the computer, or the LCD maybe can't draw as fast as you
 115          are requesting.
 116
 117          If you don't know what I'm talking about, ignore it.
 118
 119          If you compile this as a module, you can still override this
 120          value using the module parameters.
 121
 122endif # AUXDISPLAY
 123
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