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DM814x C6A814x AM387x PSP Release Notes

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This document covers details for TI814x release. This release is tested on DM8148EVM

TI814x PSP

Release Notes

Release Date: Feb 3, 2011

Document License

This work is licensed under the Creative Commons Attribution-Share Alike 3.0 United States License. To view a copy of this license, visit or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.

Read This First

1) The kernel NAND driver now uses 1-bit h/w ECC and U-Boot is also updated accordingly. So it is mandatory to re-flash the latest U-Boot along with kernel and filesystem (if using NAND based kernel and/or filesystem) as provided in this release before proceeding to boot the kernel.

2) The serial console device names in this kernel are changed from ttySx to ttyOx. This means you will need to change the boot arguments passed to kernel and the /etc/inittab file in the filesystem accordingly when booting the kernel. Please refer Using The Correct Console Device section in User Guide.

3) You might need to update the DHCP script in your filesystem when using network mounted root filesystem with the kernel from this release. Please refer Updating the DHCP Script section in User Guide.

4) The parameter passed to mkfs.jffs2 while creating JFFS2 image has changed, please refer "Creating JFFS2 File-system" section under "U-Boot NAND Support" in U-Boot User Guide.

5) The steps for flashing jffs2 image to NAND from U-Boot has changed, please refer "Flashing File-system from U-Boot" section under "U-Boot NAND Support" in U-Boot User Guide.


This is Release of TI814x Linux PSP tested on DM8148 EVM. The EVM consists of base board. In the rest of the document, we will refer this setup as DM8148 EVM.

The Linux PSP serves to provide a fundamental software platform for development, deployment and execution of Linux based applications on Texas Instruments DM8148 EVM. The Linux kernel and U-Boot software in this release are based on the following open source repositories:

Component Version Base Repository Base Tag (or commit id)
TI814x Linux Kernel 2.6.37-rc3(Linux kernel version);a=commit;h=5a5ae19658c9492493261eb44a842a46596a18a6 5a5ae19658c9492493261eb44a842a46596a18a6
U-Boot 2010.06;a=summary v2010.06

The code base for Linux kernel and U-Boot included in this release is hosted at the following repositories:

Component Repository (Branch) Baseline Tag/Commit Release Tag
TI814x Linux Kernel;a=summary (ti81xx-master) 5a5ae19658c9492493261eb44a842a46596a18a6 v2.6.37-rc3_TI814XPSP_04.01.00.02.patch2
TI814x U-Boot;a=summary (ti81xx-master) v2010.06 v2010.06_TI814XPSP_04.01.00.02

For detailed information on the various software components included in the release and how to use them, please refer to the User Guide.

The kernel and U-Boot have been compiled with CodeSourcery GNU Toolchain for ARM Processors 2009-q1-203 based on GCC 4.3.3


The User Guide provides instructions on how to use the PSP Release package. A copy of the UserGuide is included in the docs folder of the package.

What's Supported

SDK package includes support for DM8148 EVM platform.

The Linux PSP package supports the following components:

  • U-Boot supporting NAND, SD and SPI, boot modes
  • Linux Kernel and device drivers.
    • Ethernet
    • MUSB host driver supporting Mass Storage Class and HID class on USB0 and USB1.
    • NAND
    • UART
    • I2C
    • SATA
    • EDMA
    • Audio
    • SPI (PIO mode)
    • SD
    • Video Display Driver(FBDev)
    • TILER
    • IOMMU
  • Pre-built binaries for U-Boot (for SD and NAND boot mode only), Linux kernel.
  • Pre-Built binaries for NAND and SPI flash writers.

What's Not Supported

  • Following are not supported:
    • PCIe Boot
    • PCIe RC driver
    • NOR Boot
    • Ethernet Boot
    • HDMI Audio
    • TVP5158 Audio
    • ADC3101 Audio
    • RTC
    • WDT
    • GPIO
    • The release package does not include a filesystem image

Fixed in this Release

This section lists issues fixed in this release:

Issue Identifier
Issue Headline
SDOCM00074654 Top command always displays per process CPU load as 0%
SDOCM00077516 U-Boot does not read MAC address from eFuse registers
SDOCM00077309 SD boot clk config missing
SDOCM00072641 USB MSC: Device node is not deleted after USB harddisk unplugged and also device unplugged notification is not seen

New in this Release

  • Updated to Linux 2.6.37-rc3 kernel from linux-omap git
  • NAND 1-bit h/w ECC support in U-Boot and Kernel (Enabled by default)
  • SD Boot
  • SD Driver in Linux

Known Issues

This section lists known issues observed in this release:

Issue Identifier
Issue Headline
Known Workaround(s)
Audio: Overrun, underrun errors observed for less period sizes less than 64 frames
Fourth test(try to write off end of device) in mtd_oobtest is failing for read on third mtd partition

This is a limitation in Linux NAND stack. Fourth mtd_oobtest will fail if used in intermediate partitions in a flash device. Hence if mtd4 is used for mtd_oobtest it would succeed.

Kernel build throws warnings


These warnings will not be fixed as they are from common kernel or Omap OMAP(2/3) source.

NAND 4 bit ECC not supported in TI814x


This is a hardware issue and will not be supported.

Linux SD driver cannot detect SD card hot insertion
Make sure to insert SD card before booting
MMC/SD card's write protect status is not detected
Host does not enumerate devices connected to all the ports of a port multiplier.
Do not use 0th Port of the port multiplier and connect the required devices to the remaining ports of the port multiplier
USB: While USB Audio record and playback there is underrun error displayed on the console
USB Module support: USB Modular feature (insmod/rmmod) is not supported
Known issue
Defconfig: The default ti8148_evm_defconfig throws warning when mulitmedia support and UVC usb class is selcted

Known issue.

USB:Gadget:Perrformance: The Write performance is very poor for USB Gadget with SATA as storag device
Known issue
Kernel build fails if IOMMU Debug-FS is enabled in kernel configuration
Disable iommu debug-fs support during kernel configuration (menuconfig)
CCS based JTAG flashing tool can be used only to flash bootloader
For other images use u-boot or uart boot mode.
HDMI PLL doesn't get locked on some of Centaurus boards. Will be fixed in PG2.0 version of Silicon
Try on other Board.

Installation and Usage

Please look for detailed installation and usage instructions in the User Guide

Upgrade and Compatibility Information

To upgrade to new PSP release, simply delete the old release and extract the new release in its place.


Device Support

This release supports the Texas Instruments DM8148 EVM

Validation Information

This release is tested on DM8148 EVM with SDK filesystem (link to be updated).

ARM is running at 600 MHz and DDR2 at 333 MHz.


This is release of TI814X Linux PSP product.

Technical Support and Product Updates

For further information or to report any problems, contact or

OMAP Linux Mailing List: