--- /dev/null
+ U-Boot for TX6
+ ==============
+
+Building U-Boot
+---------------
+
+Note: There are currently six variants of the TX6 module, that
+ require slightly different U-Boot configurations. They are
+ distinguished through the 'TX6' suffix 'Q' or 'U' and the
+ numerical suffix of the module name. Replace the '?' in the
+ following description with the corresponding digits from your
+ TX6 module.
+ E.g. TX6Q-1010 => 'make tx6q-1010_config'
+
+Unpacking the source
+--------------------
+mkdir u-boot
+cd u-boot
+tar -xjf /cdrom/U-Boot/u-boot-src.tar.bz2
+
+Alternatively you can access the current source via the git repository:
+git://git.kernelconcepts.de/karo-tx-uboot.git master
+
+
+Compiling U-Boot
+----------------
+export ARCH=arm
+export CROSS_COMPILE=arm-cortexa9-linux-gnueabi-
+make tx6?-??1?_config (see above Note!)
+make
+
+
+Flashing U-Boot Image
+---------------------
+If you want to replace a working U-Boot with a new version, you can
+load the new U-Boot image via TFTP or SD-Card and write it to flash
+with the 'romupdate' command.
+
+If you want to revive a bricked module, U-Boot can be downloaded via
+USB with the 'sbloader' tool in recovery boot mode (Bootmode jumper ST3
+on Starterkit-5 baseboard closed). See TX6_U-Boot.pdf for details.
+
+e.g.: /cdrom/Flashtools/Linux/sbloader/sbloader-x86_32 -m -s /cdrom/U-Boot/target/u-boot-tx6q-1010.bin
+(This command can be used from within the ARMSK-VM)
+
+MfgTool
+-------
+For Windows users the application MfgTool allows the (re-)flashing of
+U-Boot. For more information either see:
+
+\U-Boot\TX6Q_U-Boot.pdf
+\STK5_TX6Q_Quickstart_Guide.pdf
+\Flashtools\Windows\Mfgtools-TX6...
+
+
+U-Boot Features
+---------------
+
+Environment variables:
+
+cpu_clk <CPU freq [MHz]> CPU clock frequency set after boot.
+
+touchpanel {tsc2007|edt-ft5x06|egalax_ts} type of touchpanel.
+ No touchpanel will be enabled when unset.
+
+otg_mode [host|device|none] operation mode of the USBOTG port
+
+video_mode <one of the display names from the Glyn Family Concept or
+ a video mode as understood by Linux fb_find_mode() function
+ (e.g.: 640x480MR-24@60)>
+ LCD interface will be disabled when unset.
+
+baseboard {stk5-v3|stk5-v5} selects type of baseboard
+ 'stk5-v5' setting disables USB Host mode on USBOTG port
+ and redefines the LCD0 pin as CAN transceiver control pin.
+ Strings not starting in 'stk5' prevent the STK5 specific
+ pad initialization to be done.
+
+splashimage either: memory address (e.g. ${loadaddr}) of a BMP file
+ to be displayed instead of the built-in logo. Since NAND
+ flash is not accessible in a memory mapped fashion,
+ U-Boot will try to load the contents of the flash
+ partition 'logo.bmp' to the address given with
+ 'splashimage'.
+
+ or: the name of an MTD partition, that contains a raw
+ dump of the frame buffer contents which will be loaded
+ to the framebuffer.
+
+splashpos (when 'splashimage' contains a memory address) the
+ position ('x,y') on the screen at which the BMP image
+ will be displayed.
+ Setting splashpos to 'm,m' will center the image on the
+ screen.
+
+Note: Some variables (like 'cpu_clk' or 'splashimage') may render the
+ board unbootable if incorrectly set. Therefore these variables
+ will not be evaluated in case the board has been reset through a
+ watchdog reset or <CTRL-C> is detected on the serial console
+ during startup to give the user a chance to recover from this
+ situation. You should press and hold <CTRL-C> before applying
+ power to the module, for this to work.
projects / karo-tx-uboot.git / blobdiff