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
   8 menuconfig 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
  16 config CHARLCD
  17         tristate "Character LCD core support" if COMPILE_TEST
  18
  19 if AUXDISPLAY
  20
  21 config HD44780
  22         tristate "HD44780 Character LCD support"
  23         depends on GPIOLIB || COMPILE_TEST
  24         select CHARLCD
  25         ---help---
  26           Enable support for Character LCDs using a HD44780 controller.
  27           The LCD is accessible through the /dev/lcd char device (10, 156).
  28           This code can either be compiled as a module, or linked into the
  29           kernel and started at boot.
  30           If you don't understand what all this is about, say N.
  31
  32 config KS0108
  33         tristate "KS0108 LCD Controller"
  34         depends on PARPORT_PC
  35         default n
  36         ---help---
  37           If you have a LCD controlled by one or more KS0108
  38           controllers, say Y. You will need also another more specific
  39           driver for your LCD.
  40
  41           Depends on Parallel Port support. If you say Y at
  42           parport, you will be able to compile this as a module (M)
  43           and built-in as well (Y).
  44
  45           To compile this as a module, choose M here:
  46           the module will be called ks0108.
  47
  48           If unsure, say N.
  49
  50 config KS0108_PORT
  51         hex "Parallel port where the LCD is connected"
  52         depends on KS0108
  53         default 0x378
  54         ---help---
  55           The address of the parallel port where the LCD is connected.
  56
  57           The first  standard parallel port address is 0x378.
  58           The second standard parallel port address is 0x278.
  59           The third  standard parallel port address is 0x3BC.
  60
  61           You can specify a different address if you need.
  62
  63           If you don't know what I'm talking about, load the parport module,
  64           and execute "dmesg" or "cat /proc/ioports". You can see there how
  65           many parallel ports are present and which address each one has.
  66
  67           Usually you only need to use 0x378.
  68
  69           If you compile this as a module, you can still override this
  70           using the module parameters.
  71
  72 config KS0108_DELAY
  73         int "Delay between each control writing (microseconds)"
  74         depends on KS0108
  75         default "2"
  76         ---help---
  77           Amount of time the ks0108 should wait between each control write
  78           to the parallel port.
  79
  80           If your LCD seems to miss random writings, increment this.
  81
  82           If you don't know what I'm talking about, ignore it.
  83
  84           If you compile this as a module, you can still override this
  85           value using the module parameters.
  86
  87 config CFAG12864B
  88         tristate "CFAG12864B LCD"
  89         depends on X86
  90         depends on FB
  91         depends on KS0108
  92         select FB_SYS_FILLRECT
  93         select FB_SYS_COPYAREA
  94         select FB_SYS_IMAGEBLIT
  95         select FB_SYS_FOPS
  96         default n
  97         ---help---
  98           If you have a Crystalfontz 128x64 2-color LCD, cfag12864b Series,
  99           say Y. You also need the ks0108 LCD Controller driver.
 100
 101           For help about how to wire your LCD to the parallel port,
 102           check Documentation/auxdisplay/cfag12864b
 103
 104           Depends on the x86 arch and the framebuffer support.
 105
 106           The LCD framebuffer driver can be attached to a console.
 107           It will work fine. However, you can't attach it to the fbdev driver
 108           of the xorg server.
 109
 110           To compile this as a module, choose M here:
 111           the modules will be called cfag12864b and cfag12864bfb.
 112
 113           If unsure, say N.
 114
 115 config CFAG12864B_RATE
 116        int "Refresh rate (hertz)"
 117         depends on CFAG12864B
 118         default "20"
 119         ---help---
 120           Refresh rate of the LCD.
 121
 122           As the LCD is not memory mapped, the driver has to make the work by
 123           software. This means you should be careful setting this value higher.
 124           If your CPUs are really slow or you feel the system is slowed down,
 125           decrease the value.
 126
 127           Be careful modifying this value to a very high value:
 128           You can freeze the computer, or the LCD maybe can't draw as fast as you
 129           are requesting.
 130
 131           If you don't know what I'm talking about, ignore it.
 132
 133           If you compile this as a module, you can still override this
 134           value using the module parameters.
 135
 136 config IMG_ASCII_LCD
 137         tristate "Imagination Technologies ASCII LCD Display"
 138         default y if MIPS_MALTA || MIPS_SEAD3
 139         select SYSCON
 140         help
 141           Enable this to support the simple ASCII LCD displays found on
 142           development boards such as the MIPS Boston, MIPS Malta & MIPS SEAD3
 143           from Imagination Technologies.
 144
 145 config HT16K33
 146         tristate "Holtek Ht16K33 LED controller with keyscan"
 147         depends on FB && OF && I2C && INPUT
 148         select FB_SYS_FOPS
 149         select FB_SYS_FILLRECT
 150         select FB_SYS_COPYAREA
 151         select FB_SYS_IMAGEBLIT
 152         select INPUT_MATRIXKMAP
 153         select FB_BACKLIGHT
 154         help
 155           Say yes here to add support for Holtek HT16K33, RAM mapping 16*8
 156           LED controller driver with keyscan.
 157
 158 endif # AUXDISPLAY
 159
 160 config ARM_CHARLCD
 161         bool "ARM Ltd. Character LCD Driver"
 162         depends on PLAT_VERSATILE
 163         help
 164           This is a driver for the character LCD found on the ARM Ltd.
 165           Versatile and RealView Platform Baseboards. It doesn't do
 166           very much more than display the text "ARM Linux" on the first
 167           line and the Linux version on the second line, but that's
 168           still useful.
 169
 170 config PANEL
 171         tristate "Parallel port LCD/Keypad Panel support"
 172         depends on PARPORT
 173         select CHARLCD
 174         ---help---
 175           Say Y here if you have an HD44780 or KS-0074 LCD connected to your
 176           parallel port. This driver also features 4 and 6-key keypads. The LCD
 177           is accessible through the /dev/lcd char device (10, 156), and the
 178           keypad through /dev/keypad (10, 185). This code can either be
 179           compiled as a module, or linked into the kernel and started at boot.
 180           If you don't understand what all this is about, say N.
 181
 182 if PANEL
 183
 184 config PANEL_PARPORT
 185         int "Default parallel port number (0=LPT1)"
 186         range 0 255
 187         default "0"
 188         ---help---
 189           This is the index of the parallel port the panel is connected to. One
 190           driver instance only supports one parallel port, so if your keypad
 191           and LCD are connected to two separate ports, you have to start two
 192           modules with different arguments. Numbering starts with '0' for LPT1,
 193           and so on.
 194
 195 config PANEL_PROFILE
 196         int "Default panel profile (0-5, 0=custom)"
 197         range 0 5
 198         default "5"
 199         ---help---
 200           To ease configuration, the driver supports different configuration
 201           profiles for past and recent wirings. These profiles can also be
 202           used to define an approximative configuration, completed by a few
 203           other options. Here are the profiles :
 204
 205             0 = custom (see further)
 206             1 = 2x16 parallel LCD, old keypad
 207             2 = 2x16 serial LCD (KS-0074), new keypad
 208             3 = 2x16 parallel LCD (Hantronix), no keypad
 209             4 = 2x16 parallel LCD (Nexcom NSA1045) with Nexcom's keypad
 210             5 = 2x40 parallel LCD (old one), with old keypad
 211
 212           Custom configurations allow you to define how your display is
 213           wired to the parallel port, and how it works. This is only intended
 214           for experts.
 215
 216 config PANEL_KEYPAD
 217         depends on PANEL_PROFILE="0"
 218         int "Keypad type (0=none, 1=old 6 keys, 2=new 6 keys, 3=Nexcom 4 keys)"
 219         range 0 3
 220         default 0
 221         ---help---
 222           This enables and configures a keypad connected to the parallel port.
 223           The keys will be read from character device 10,185. Valid values are :
 224
 225             0 : do not enable this driver
 226             1 : old 6 keys keypad
 227             2 : new 6 keys keypad, as used on the server at www.ant-computing.com
 228             3 : Nexcom NSA1045's 4 keys keypad
 229
 230           New profiles can be described in the driver source. The driver also
 231           supports simultaneous keys pressed when the keypad supports them.
 232
 233 config PANEL_LCD
 234         depends on PANEL_PROFILE="0"
 235         int "LCD type (0=none, 1=custom, 2=old //, 3=ks0074, 4=hantronix, 5=Nexcom)"
 236         range 0 5
 237         default 0
 238         ---help---
 239            This enables and configures an LCD connected to the parallel port.
 240            The driver includes an interpreter for escape codes starting with
 241            '\e[L' which are specific to the LCD, and a few ANSI codes. The
 242            driver will be registered as character device 10,156, usually
 243            under the name '/dev/lcd'. There are a total of 6 supported types :
 244
 245              0 : do not enable the driver
 246              1 : custom configuration and wiring (see further)
 247              2 : 2x16 & 2x40 parallel LCD (old wiring)
 248              3 : 2x16 serial LCD (KS-0074 based)
 249              4 : 2x16 parallel LCD (Hantronix wiring)
 250              5 : 2x16 parallel LCD (Nexcom wiring)
 251
 252            When type '1' is specified, other options will appear to configure
 253            more precise aspects (wiring, dimensions, protocol, ...). Please note
 254            that those values changed from the 2.4 driver for better consistency.
 255
 256 config PANEL_LCD_HEIGHT
 257         depends on PANEL_PROFILE="0" && PANEL_LCD="1"
 258         int "Number of lines on the LCD (1-2)"
 259         range 1 2
 260         default 2
 261         ---help---
 262           This is the number of visible character lines on the LCD in custom profile.
 263           It can either be 1 or 2.
 264
 265 config PANEL_LCD_WIDTH
 266         depends on PANEL_PROFILE="0" && PANEL_LCD="1"
 267         int "Number of characters per line on the LCD (1-40)"
 268         range 1 40
 269         default 40
 270         ---help---
 271           This is the number of characters per line on the LCD in custom profile.
 272           Common values are 16,20,24,40.
 273
 274 config PANEL_LCD_BWIDTH
 275         depends on PANEL_PROFILE="0" && PANEL_LCD="1"
 276         int "Internal LCD line width (1-40, 40 by default)"
 277         range 1 40
 278         default 40
 279         ---help---
 280           Most LCDs use a standard controller which supports hardware lines of 40
 281           characters, although sometimes only 16, 20 or 24 of them are really wired
 282           to the terminal. This results in some non-visible but addressable characters,
 283           and is the case for most parallel LCDs. Other LCDs, and some serial ones,
 284           however, use the same line width internally as what is visible. The KS0074
 285           for example, uses 16 characters per line for 16 visible characters per line.
 286
 287           This option lets you configure the value used by your LCD in 'custom' profile.
 288           If you don't know, put '40' here.
 289
 290 config PANEL_LCD_HWIDTH
 291         depends on PANEL_PROFILE="0" && PANEL_LCD="1"
 292         int "Hardware LCD line width (1-64, 64 by default)"
 293         range 1 64
 294         default 64
 295         ---help---
 296           Most LCDs use a single address bit to differentiate line 0 and line 1. Since
 297           some of them need to be able to address 40 chars with the lower bits, they
 298           often use the immediately superior power of 2, which is 64, to address the
 299           next line.
 300
 301           If you don't know what your LCD uses, in doubt let 16 here for a 2x16, and
 302           64 here for a 2x40.
 303
 304 config PANEL_LCD_CHARSET
 305         depends on PANEL_PROFILE="0" && PANEL_LCD="1"
 306         int "LCD character set (0=normal, 1=KS0074)"
 307         range 0 1
 308         default 0
 309         ---help---
 310           Some controllers such as the KS0074 use a somewhat strange character set
 311           where many symbols are at unusual places. The driver knows how to map
 312           'standard' ASCII characters to the character sets used by these controllers.
 313           Valid values are :
 314
 315              0 : normal (untranslated) character set
 316              1 : KS0074 character set
 317
 318           If you don't know, use the normal one (0).
 319
 320 config PANEL_LCD_PROTO
 321         depends on PANEL_PROFILE="0" && PANEL_LCD="1"
 322         int "LCD communication mode (0=parallel 8 bits, 1=serial)"
 323         range 0 1
 324         default 0
 325         ---help---
 326           This driver now supports any serial or parallel LCD wired to a parallel
 327           port. But before assigning signals, the driver needs to know if it will
 328           be driving a serial LCD or a parallel one. Serial LCDs only use 2 wires
 329           (SDA/SCL), while parallel ones use 2 or 3 wires for the control signals
 330           (E, RS, sometimes RW), and 4 or 8 for the data. Use 0 here for a 8 bits
 331           parallel LCD, and 1 for a serial LCD.
 332
 333 config PANEL_LCD_PIN_E
 334         depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
 335         int "Parallel port pin number & polarity connected to the LCD E signal (-17...17) "
 336         range -17 17
 337         default 14
 338         ---help---
 339           This describes the number of the parallel port pin to which the LCD 'E'
 340           signal has been connected. It can be :
 341
 342                   0 : no connection (eg: connected to ground)
 343               1..17 : directly connected to any of these pins on the DB25 plug
 344             -1..-17 : connected to the same pin through an inverter (eg: transistor).
 345
 346           Default for the 'E' pin in custom profile is '14' (AUTOFEED).
 347
 348 config PANEL_LCD_PIN_RS
 349         depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
 350         int "Parallel port pin number & polarity connected to the LCD RS signal (-17...17) "
 351         range -17 17
 352         default 17
 353         ---help---
 354           This describes the number of the parallel port pin to which the LCD 'RS'
 355           signal has been connected. It can be :
 356
 357                   0 : no connection (eg: connected to ground)
 358               1..17 : directly connected to any of these pins on the DB25 plug
 359             -1..-17 : connected to the same pin through an inverter (eg: transistor).
 360
 361           Default for the 'RS' pin in custom profile is '17' (SELECT IN).
 362
 363 config PANEL_LCD_PIN_RW
 364         depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
 365         int "Parallel port pin number & polarity connected to the LCD RW signal (-17...17) "
 366         range -17 17
 367         default 16
 368         ---help---
 369           This describes the number of the parallel port pin to which the LCD 'RW'
 370           signal has been connected. It can be :
 371
 372                   0 : no connection (eg: connected to ground)
 373               1..17 : directly connected to any of these pins on the DB25 plug
 374             -1..-17 : connected to the same pin through an inverter (eg: transistor).
 375
 376           Default for the 'RW' pin in custom profile is '16' (INIT).
 377
 378 config PANEL_LCD_PIN_SCL
 379         depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0"
 380         int "Parallel port pin number & polarity connected to the LCD SCL signal (-17...17) "
 381         range -17 17
 382         default 1
 383         ---help---
 384           This describes the number of the parallel port pin to which the serial
 385           LCD 'SCL' signal has been connected. It can be :
 386
 387                   0 : no connection (eg: connected to ground)
 388               1..17 : directly connected to any of these pins on the DB25 plug
 389             -1..-17 : connected to the same pin through an inverter (eg: transistor).
 390
 391           Default for the 'SCL' pin in custom profile is '1' (STROBE).
 392
 393 config PANEL_LCD_PIN_SDA
 394         depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0"
 395         int "Parallel port pin number & polarity connected to the LCD SDA signal (-17...17) "
 396         range -17 17
 397         default 2
 398         ---help---
 399           This describes the number of the parallel port pin to which the serial
 400           LCD 'SDA' signal has been connected. It can be :
 401
 402                   0 : no connection (eg: connected to ground)
 403               1..17 : directly connected to any of these pins on the DB25 plug
 404             -1..-17 : connected to the same pin through an inverter (eg: transistor).
 405
 406           Default for the 'SDA' pin in custom profile is '2' (D0).
 407
 408 config PANEL_LCD_PIN_BL
 409         depends on PANEL_PROFILE="0" && PANEL_LCD="1"
 410         int "Parallel port pin number & polarity connected to the LCD backlight signal (-17...17) "
 411         range -17 17
 412         default 0
 413         ---help---
 414           This describes the number of the parallel port pin to which the LCD 'BL' signal
 415           has been connected. It can be :
 416
 417                   0 : no connection (eg: connected to ground)
 418               1..17 : directly connected to any of these pins on the DB25 plug
 419             -1..-17 : connected to the same pin through an inverter (eg: transistor).
 420
 421           Default for the 'BL' pin in custom profile is '0' (uncontrolled).
 422
 423 config PANEL_CHANGE_MESSAGE
 424         bool "Change LCD initialization message ?"
 425         default "n"
 426         ---help---
 427           This allows you to replace the boot message indicating the kernel version
 428           and the driver version with a custom message. This is useful on appliances
 429           where a simple 'Starting system' message can be enough to stop a customer
 430           from worrying.
 431
 432           If you say 'Y' here, you'll be able to choose a message yourself. Otherwise,
 433           say 'N' and keep the default message with the version.
 434
 435 config PANEL_BOOT_MESSAGE
 436         depends on PANEL_CHANGE_MESSAGE="y"
 437         string "New initialization message"
 438         default ""
 439         ---help---
 440           This allows you to replace the boot message indicating the kernel version
 441           and the driver version with a custom message. This is useful on appliances
 442           where a simple 'Starting system' message can be enough to stop a customer
 443           from worrying.
 444
 445           An empty message will only clear the display at driver init time. Any other
 446           printf()-formatted message is valid with newline and escape codes.
 447
 448 endif # PANEL