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 16config CHARLCD 17 tristate "Character LCD core support" if COMPILE_TEST 18 19if AUXDISPLAY 20 21config 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 32config 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 50config 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 72config 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 87config 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 115config 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 136config 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 145config 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 158endif # AUXDISPLAY 159 160config 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 170config 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 182if PANEL 183 184config 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 195config 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 216config 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 233config 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 256config 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 265config 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 274config 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 290config 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 304config 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 320config 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 333config 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 348config 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 363config 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 378config 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 393config 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 408config 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 423config 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 435config 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 448endif # PANEL 449