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