X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=doc%2FREADME.KARO-TX28;h=c5a1fe13adcaaa3d1ca81b2c9ef27de7923a364b;hb=c552f39b08da25a7ca5af89e6d5f2cf93e7fe2aa;hp=36b86573979138bff153bed0b3743ebaf42119ba;hpb=56b0f39408c3d78dacb02db88de15e669dff9669;p=karo-tx-uboot.git

diff --git a/doc/README.KARO-TX28 b/doc/README.KARO-TX28
index 36b8657397..c5a1fe13ad 100644
--- a/doc/README.KARO-TX28
+++ b/doc/README.KARO-TX28
@@ -4,12 +4,12 @@
 Building U-Boot
 ---------------
 
-Note: There are currently two variants of the TX53 module, that
+Note: There are currently two variants of the TX28 module, that
       require slightly different U-Boot configurations. They are
       distinguished through the last digit of the module name. Replace
       the '?' in the following description with the corresponding
-      number from your TX51 module.
-      E.g. TX53-8031 => 'make tx53-xx31_config'
+      number from your TX28 module.
+      E.g. TX28-4031 => 'make tx28-40x1_config'
 
 Unpacking the source
 --------------------
@@ -17,37 +17,74 @@ 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.karo-electronics.de/karo-tx-uboot.git master
+
+
 Compiling U-Boot
 ----------------
 export ARCH=arm
-export CROSS_COMPILE=arm-cortexa8-linux-gnueabi-
-make tx28-4?xx_config            (see above Note!)
+export CROSS_COMPILE=arm-926ejs-linux-gnueabi-
+make tx28-4?x?_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 and program it like any other flash
-partition with:
-nand erase.part u-boot;nand write.trimffs ${fileaddr} u-boot ${filesize}
+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 (Jumper ST3
-on Starterkit-5 baseboard closed). See TX28-U-Boot.pdf for details.
+USB with the 'sbloader' tool in recovery boot mode (Bootmode jumper ST3
+on Starterkit-5 baseboard closed). See TX28_U-Boot.pdf for details.
+
+e.g.: /cdrom/Flashtools/Linux/sbloader/sbloader-x86_32 -s /cdrom/U-Boot/u-boot-tx28-4031.bin
+(This command can be used from within the ARMSK-VM)
 
 
 U-Boot Features
 ---------------
 
 Environment variables:
+boot_mode     selects which boot script will be used by 'bootcmd' to
+	      boot the application (Linux)
+	      supported values:
+	      nand: (default) load kernel from NAND partition 'linux'
+			      and mount rootfs (fstype UBIFS)
+			      from partition 'rootfs'. 
+	      mmc:	      load kernel from file 'uImage' on first
+	      		      partition (FAT) on (first) SD/MMC card
+			      and mount rootfs (fstype autodetected)
+			      from second partition.
+	      net:	      load kernel image via tftp (file uImage)
+	      		      and mount rootfs via NFS. This requires
+			      the additional variables 'nfsroot'
+			      (path to rootfs on NFS server) and
+			      'nfs_server' (hostname or IP address of
+			      NFS server) to be set.
+	      jffs2: (legacy) load kernel from NAND partition 'linux'
+			      and mount rootfs (fstype JFFS2)
+			      from partition 'rootfs'.
+
+cpu_clk       <CPU freq [MHz]> CPU clock frequency set after boot.
+
+touchpanel    {tsc2007|edt-ft5x06|imx28-lradc} 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.
 
-cpu_clk       <CPU freq [MHz]>
-touchpanel    {tsc2007|edt-ft5x06}
-otg_mode      [host|device|none]
-video_mode    <video mode as understood by Linux fb_find_mode() function>
-              e.g.: VGA-1:640x480MR-24@60
 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,
@@ -68,6 +105,7 @@ splashpos     (when 'splashimage' contains a memory address) the
 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 a character is available on the serial console
+      watchdog reset or <CTRL-C> is detected on the serial console
       during startup to give the user a chance to recover from this
-      situation.
+      situation. You should press and hold <CTRL-C> before applying
+      power to the module, for this to work.