Embedded module TQMa6x - PTXdist Linux BSP documentation



Known Issues

Linux BSP Rev.0113

U-Boot 2017.11

U-Boot Environment
Affects U-Boot Environment
Issue U-Boot Environment loading/storing uses eMMC only
Effect If eMMC contains a valid environment sector the BSP Rev.0113 U-Boot will load that environment regardless of the actual boot device (e.g. sd card).
As the partition layout has been changed with BSP Rev.0110, boot commands from environments of BSP Revs. ≤ 0109 will not work anymore.
In consequence booting BSP Rev.0113 U-Boot will fail if an environment from BSP Rev. ≤ 0109 is present in eMMC.
Solution / Workaround Will be fixed in next BSP release.
Workaround boot failure:
  1. Boot from SD card using BSP Rev.0113 U-Boot
  2. Interrupt autoboot to access the U-Boot command line interface
  3. Set eMMC to be the active mmc device
    mmc dev 0
  4. Erase the environment sector
    mmc erase 0x800 0x800
  5. Reboot the system:
    reset
  6. Interrupt autoboot to access the U-Boot command line interface
  7. Save default enviroment to eMMC
    saveenv

Linux BSP Rev.0109

Vivante GPU Driver

Vivante GPU driver warning
Affects Linux kernel boot messages
Issue Warning about a possible deadlock
Effect none (i.e. just a warning, no deadlocks occur
Solution / Workaround fixed in later driver versions


PTXdist

Build failure on Ubuntu 16.x host
Affects Image/RootFS creation
Issue Segmentation fault caused by genimage-7 tool when run on Ubuntu 16.x host
Effect Target root.ext2 fails to build.
Solution / Workaround Use genimage-8 instead of genimage-7

1. copy host-genimage.in and host-genimage.make from /usr/local/lib/ptxdist-2015.05.0/rules/ to TQMa6x-BSP-REV.0109/rules/
2. modify TQMa6x-BSP-REV.0109/rules/host-genimage.make like this:
HOST_GENIMAGE_VERSION    := 8
HOST_GENIMAGE_MD5        := 506a0cd6722431af87ef7cfe437662cc

3. run ptxdist clean host-genimage
4. run ptxdist images

Linux BSP Rev.0105

PTXdist

U-Boot build failure
Affects U-Boot build stage
Issue Typo in configs/platform-tq-mba6x/rules/u-boot-spi-tqma6s.make
Effect When U_BOOT_SPI_TQMA6S is selected, U-Boot fails to build properly.
Solution / Workaround Change line 29 in configs/platform-tq-mba6x/rules/u-boot-spi-tqma6s.make from
U_BOOT_SPI_TQMA6S_LICENS E := GPLv2
to
U_BOOT_SPI_TQMA6S_LICENSE := GPLv2

Linux BSP Rev.0104

PTXdist

U-Boot build failure

Linux Kernel 3.16

Kernel does not boot
Affects U-Boot & U-Boot environment
Issue New Kernel memory map
Effect Kernel does not boot (properly) with U-Boot and U-Boot environment from BSPs < Rev. 0104
Solution / Workaround Use U-Boot from BSP Rev. 0104 and reset U-Boot envrionment to default (any custom variables can, of course, be added again afterwards).

OSELAS.Toolchain 2013.12.x from debian.pengutronix.de

Qt Creator debugging fails
Affects
Subject 		GDB
Issue Missing support for Python scripts (i.e., gdb is not configured using –with-python)
Effect Qt Creator Debugging Helpers will not work (properly)
Solution / Workaround Build toolchain from source

Linux

General

  • Affected Revisions: prerel 20130407
  • Issue: spurios kernel panic when mounting NFS root on TQMa6S
  • Solution: fixed in newer releases

CAN

  • Affected Revisions: up to 0100
  • Issue: wrong Bitrate setup
  • Solution: fix planned for REV 0101

Ethernet

  • Affected Revisions: all
  • Issue: missing support for GIGE
  • Solution: Software fix planned for REV 0101, needs MBa6x 0102
  • Affected Revisions: all
  • Issue: missing support for GIGE
  • Solution: currently none, under investigation

USB

  • Affected Revisions: all
  • Issue: Hub power issue, hub signals that port draws too much current even if the hub is powered
  • Solution: fixed, needs hardware workaround on MBa6x REV0100, fixed on newer revisions
  • Affected Revisions: prerel 20130704
  • Issue: missing LED support for USB-Ethernet port
  • Solution: fixed in newer BSP

I2C

  • Affected Revisions: prerel 20130407
  • Issue: I2C eeprom access slow
  • Solution: fixed in newer releases

SD / eMMC

  • Affected Revisions: all
  • Issue: spurios SD card write error -84
  • Solution: under investigation

SPI

  • Affected Revisions: all
  • Issue: missing support for boot from SPI-NOR
  • Solution: currently none, planned for future release

PTXdist

Toolchain

If you have compiler / compilation errors please contact us using our web formular.

OSELAS.Toolchain 2012.12.x

  • Affected Revisions: all
  • Issue: missing support for cortex-strings in glibc
  • Solution:
    1) If performance impacts are noticed, use OSELAS.Toolchain for cortexa8. It is known to work
    2) Try other toolchain with cortex-strings support

Disclaimer
TQ-Systems GmbH provides the Board Support Packages (BSP) free of charge. The software included in the shipment has been configured individually for the starter kits. The software is only intended to evaluate the module. The use of the Board Support Packages (BSP) is only allowed within the scope of functionality described by TQ-Systems GmbH. TQ-Systems GmbH does not accept any liability for all further changes of the Board Support Package and for any damage resulting from its use.