Target Board Information STMicroelectronics STx7200 MBoard (mb519)

The mb519 is the processor board for the STx7200 MBoard. It can be used stand-alone, or plugged into an application specific motherboard.

Hardware Setup

Switch settings

To use the on-board STE101P Ethernet PHY, jumper TP45 must be fitted in the 2-3 position.

Serial ports

EMI Config

Known problems

Ethernet PHY

When probing for an Ethernet PHY, the STx7200 tends to lock up if the PHY is not correctly detected. There can be several reasons for this:

• There are two Ethernet interfaces on the STx7200, the first uses a PHY on the mb519: U26 which is an STE101P. Sometimes the mb519 ships without this chip on the board, and so it will need to be fitted (it is located just behind the RJ45).

  The second PHY is connected using J2, and so requires daughter board. An example of this is the mb536 which uses a SMSC LAN8700.

  To disable one or both of these interfaces in case the PHY is not present, it needs to be removed from the kernel devices list. In arch/sh/boards/st/mb519/setup.c:

  static struct platform_device *stx7200mboard_devices[] __initdata = { &stmmaceth_device[0], &stmmaceth_device[1],

  Remove which ever device is causing problems.
• In addition, to use the on board Ethernet, a few jumpers need to be set:
  • TP45 must be in the 2-3 position
  • TP50 and TP51 should be open
  • Switches SW4 need to be all off except position 5 should be on.
  • For correct operation of the PHY interrupt, switch SW1 position 4 needs to be on.
• The board must be using EPLD revision v1r2 or later. Linux prints the EPLD revision as it boots, however versions 2.6.17.14_stm22_0039 and 2.6.17.14_stm23ear_0100 format this incorrectly, using decimal rather than hex, so on these boards use need version 18 or later.
  For example:

  mb519 PCB rev 12 EPLD rev 17

  is not sufficient, but:

  mb519 PCB rev 11 EPLD rev 19

  is OK.

USB 1.1

A bug has been found in the 2.6.17.14_stm22_0039 and 2.6.17.14_stm23ear_0100 kernel which prevents USB 1.1 devices from being recognised correctly. A simple fix for this is to add:

ctrl_outl(0, 0xFD701048);

to platform_setup() in arch/sh/boards/st/mb519/setup.c.

Patches

Support for the STx7200 and mb519 is provided in the 2.3EAR distribution. Patches are also available here against the kernels provided in the 2.2 distribution, but this is only an interim solution, and will not be maintained in the long term.

• linux-2.6.17.14_stm22_0038-stx7200-mb519.patch.gz patch against 2.6.17.14_stm22_0038.
• linux-2.6.17.14_stm22_0039-stx7200-mb519.patch.gz patch against 2.6.17.14_stm22_0039.