Root/drivers/auxdisplay/Kconfig

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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