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Ventana Expansion Modules

Expansion modules for adding a choice of Mini-PCIe sockets, Mini-PCI sockets, Ethernet ports and Fiber SFP pages to any Gateworks Ventana Single Board Computer. To see a complete list of expansion modules, see our main product selection guide here: ​http://www.gateworks.com/product#ventanaexpansion

• This wiki page is to provide more information about the implementation and usage the of the Ventana Expansion Modules

Connector Information

• To use a Ventana Expansion module, the base board must have the expansion connector, which is only placed on specific models.
• This expansion connector replaces one of the normal Mini-PCIe connectors, and thus one Mini-PCIe site is given up for the expansion module

• (Above) Ventana GW5100 Stacked w/GW16083 Expansion Module

• (Above) Ventana GW5100 Shown With Expansion Connector - Note standard Mini-PCIe connector is replaced with the expansion connector

• (Above) Ventana GW5300 Shown With Expansion Connector - Note standard Mini-PCIe connector is replaced with the expansion connector

Baseboard Models

Specific Ventana baseboards have a vertical board-to-board connector on their bottom-right miniPCIe socket allowing connection to an expansion mezzanine.

The following Ventana baseboards support expansion mezzanines:

• GW51xx:
  • GW5102 - Special order
  • GW5103 - Special order, check w/factory for availability

• GW52xx:
  • GW5202 - Special order
  • GW5203 - Special order, check w/factory for availability

• GW53xx:
  • GW5302 - Special order
  • GW5303 - Special order, check w/factory for availability
  • GW5312 - Special order
  • GW5313 - Special order

• GW54xx:
  • GW5402 - Special order
  • GW5403 - Special order, check w/factory for availability
  • GW5404 - Standard Stocking Model
  • GW5412 - Special order
  • GW5413 - Special order

Stacking Information

The GW16081 can be stacked multiple times upon itself if using a special variation of the GW16081 which is the GW16081-SP282.

The GW16082 and GW16083 cannot be stacked on top of itself but can be stacked on top of a GW16081-SP282 which has an expansion port.

GW16081 miniPCI-express expansion mezzanine

The GW16081 miniPCI-express expansion mezzanine adds the following capabilities to a Ventana baseboard that has a mezzanine connector:

• 140x100x13mm (5.5x3.9) form factor
• Generic Ventana Mounting Hole Pattern (standoff locations to mount to supported baseboards)
• 7x miniPCIe sockets (3 top, 4 bottom)
• 32Kb I2C serial EEPROM (24LC32AT)
• USB switch providing USB signaling to the bottom 4x miniPCIe sockets (for USB based miniPCIe form-factor cards such as bluetooth HCI's and cellular modems)
• GW16081 is powered by baseboard. Amount of power provided is dependent on baseboards power supply. Please consult baseboard user manual/datasheet.
• If desired a separate power supply can also power the GW16081 via a barrel jack input that accepts 8-60VDC. This can provide up 30W to the miniPCIe sockets on the GW16081.

Please refer to the Ventana PCI/PCIe support for important information about PCI device resource allocation for the IMX6 processor. Do not assume that 7x additional miniPCIe sockets means that you can add 7x additional PCI devices.

An ordering option exists for a version of the GW16081 which has an expansion riser to support connection to an additional Ventana Expansion Mezzanine. Please contact sales@… if you are interested in this option.

References:

• ​Product Brief / Datasheet / etc

GW16081 Software support

No software support is needed for the GW16081

GW16082 miniPCI expansion mezzanine

The GW16082 miniPCI expansion mezzanine adds the following capabilities to a Ventana baseboard that has a mezzanine connector:

• 140x100x18mm (5.5x3.9) form factor
• Generic Ventana Mounting Hole Pattern (standoff locations to mount to supported baseboards)
• 4x miniPCI sockets (2 top, 2 bottom) via a PCIe to PCI bridge
• 32Kb I2C serial EEPROM (24LC32AT)
• USB switch providing USB signaling to all 4 miniPCI sockets (for USB based miniPCI form-factor cards or miniPCI to miniPCIe adapters to support USB based devices such as bluetooth HCI's and cellular modems)
• Additional 8-60VDC input to provide 30W to the miniPCI sockets (not required if baseboard provides sufficient power for user needs).
  • If desired this power supply can also power the attached baseboard via a separate power connector cable.

Please refer to the Ventana PCI/PCIe support for important information about PCI device resource allocation for the IMX6 processor. Do not assume that 4x additional miniPCI sockets means that you can add 4x additional PCI devices.

References:

• ​GW16082 Product Brief / Datasheet / etc

GW16082 Software support

Support for the GW16082 exists for the following:

• Gateworks OpenWrt BSP
• Gateworks Android BSP
• Gateworks Yocto BSP
• Mainline Linux 3.18+

For Linux kernel versions 3.18 and beyond (ie OpenWrt 16.02 BSP using the 4.4 kernel) you must have the following:

• latest Gateworks bootloader containing a ​device-tree fixup that adds a proper interrupt-map for the bridge on the GW16082
• PCI enabled in the bootloader (in order for the above fixup to be allowed to work):

  setenv pcidisable; saveenv
  

  • Note that by default PCI is disabled in the Ventana bootloaders.

GW16083 Ethernet expansion mezzanine

The GW16083 Ethernet expansion mezzanine adds the following capabilities to a Ventana baseboard that has a mezzanine connector:

• 140x100x25mm (5.5x3.9x1.0in) form factor
• Generic Ventana Mounting Hole Pattern (standoff locations to mount to supported baseboards)
• 7-port Gigabit Ethernet Switch (Marvell LinkStreet 88E6176)
  • supports Energy Efficient Ethernet (EEE)
  • baseboard uses one port via an onboard Intel i210 PCIe Gigabit Ethernet device
  • 4x RJ45 Copper ports
  • 2x RJ45 auto-selectable Copper or SFP Module ports
    • SFP module supports Gigabit modules (to interconnect to Fiber networks for example)
• 32Kb I2C serial EEPROM (24LC32AT)
• Power over Ethernet (PoE) support via optional PoE module GW16104

Switch Details:

• 1 port of the Marvell switch is connected to an Intel i210 MAC which hangs off the baseboard PCI bus
• 4 ports of the Marvell switch use internal PHY's supporting Gigabit Copper via RJ45 jacks
• 2 ports of the Marvell switch use external Marvell PHY's that support Gigabit Copper or Gigabit SFP modules (10/100 not supported on these ports).

SFP Details:

• A software driver is required on the host to detect insertion and removal of SFP modules, query the capabilities of the SFP via its MSA, verify compatibility and configure the PHY for compatibility. Any SFP module that advertises
• Validated with:
  • Addon MGBSX1-AO (1000BASE-SX Duplex 850NM / 550M LC)
  • Addon EX-SFP-1GE-T-AO (1000BaseT Copper)

References:

• ​GW16083 Product Brief / Datasheet / etc

GW16083 Port mapping

The GW16083 uses an Intel i210 MAC (Linux igb driver) connected to a Marvell MV88E6176 6-port switch. The physical ports on the MV88E6176 are used as such:

Connector	Silkscreen	Port	DSA Common Name
J10	Ethernet4	0	lan4
J9	Ethernet3	1	lan3
J8	Ethernet2	2	lan2
J7	Ethernet1	3	lan1
-	i210 (cpu)	4	--
J3	Ethernet5	5	lan5
J2	Ethernet6	6	lan6

GW16083 Power support

The GW16083 gets its power from the baseboard through the expansion connector.

A barrel jack also exists on the GW16083. This barrel jack is only used when the optional POE module is used to output power through the ethernet ports.

GW16083 Software support

On power-up with no software support the GW16083 behaves as a simple unmanaged network switch for ports 1-4 (RJ45 copper) and the baseboard CPU upstream port.

To use ports 5-6 you need to have software drivers which are available for:

• Gateworks OpenWrt BSP
• Gateworks Android BSP
• Gateworks Yocto BSP
• Mainline Linux via patches:
  • ​net: igb: add i210/i211 support for phy read/write
  • ​net: igb: add phy read/write functions that accept phy addr
  • ​net: igb: register mii_bus for SerDes w/ external phy
  • ​phy: add driver for GW16083 Ethernet Expansion Mezzanine (main driver - see here for implementation details)
  • ​ARM: imx: ventana: added GW16083 to device-tree
  • These patches will eventually be submitted to mainline linux for consideration.

The Linux GW16083 driver software support provides the following:

• Enable ports 5-6
• register a phy driver off the i210 MDIO bus with a 1 second polling interval
• identify SFP module insertion event, detect module capabilities from MSA, ensure module compatibility, and configure switch port
• register a DSA driver to present ports as physical network interfaces (lan1-6)

The Gateworks U-Boot bootloader does not support the GW16083 meaning:

• ports 1-4 will act as a switch by default (because they power up this way) but the IMX6 eth1 port to the switch will not be active
• ports 5-6 will not be active
• PCI bus enumeration will see an i210 and show a message about its mac addr from env not matching its SROM mac addr but this has no affect because the NIC isn't supported anyway in U-Boot

The OpenWrt BSP has support for VLAN tagging and port management via OpenWrt's swconfig API however by default DSA support is enabled. See OpenWrt/swconfig for more details.

Port5/Port6 details:

• if both RJ45 (with link) as well as an SFP is inserted, the RJ45 (copper) will take precedence and be selected.
• Port physical interface mode is available from /sys/kernel/gw16083/lan*_mode:

  root@OpenWrt:/# cat /sys/kernel/gw16083/lan5_mode 
  SFP
  root@OpenWrt:/# cat /sys/kernel/gw16083/lan6_mode 
  RJ45
  

• Port SFP details are available from /sys/kernel/gw16083/lan*_sfp:

  root@OpenWrt:/# cat /sys/kernel/gw16083/lan5_sfp 
  SFP: Methode Elec. SFP-1GE-T-AO A2 ADDTX04396 
  

• Note that only GigE capable SFP's are supported
• Port management details are output to the kernel log as INFO level messages:

  root@OpenWrt:/# dmesg | grep gw16083
  [   12.639162] gw16083 1-0052: GW16083 Ethernet Expansion Mezzanine
  [   12.791152] gw16083 1-0052: registered GW16083 DSA switch
  [   12.796609] gw16083 1-0052: Configuring MV88E6176 7-port switch
  [   12.808135] gw16083 1-0052: Port5: MV88E111 PHY configured
  [   12.821554] gw16083 1-0052: Port6: MV88E111 PHY configured
  [   12.829929] gw16083 1-0052: Port5: SFP inserted
  [   12.888832] gw16083 1-0052: Port5: SFP: Methode Elec. SFP-1GE-T-AO A2 ADDTX04396 
  [   12.896432] gw16083 1-0052: Port5: 1000Base-T (Copper) (0x08)
  [   12.902209] gw16083 1-0052: Port5: SFP signal detected
  [   12.907400] gw16083 1-0052: Port5: copper auto-selected
  [   12.913102] gw16083 1-0052: Port5: SFP TX disabled
  [   12.917916] gw16083 1-0052: Port5: Copper: set auto-neg link/duplex/speed
  [   12.925601] gw16083 1-0052: Port5: SFP TX enabled
  [   12.930330] gw16083 1-0052: Port5: SFP: force 1000mbps link up (auto-negotiate duplex)
  [   21.123062] igb 0000:06:00.0 eth1: igb PHY driver [gw16083] (mii_bus:phy_addr=0000:06:00.0-157:10)
  [  592.964879] gw16083 1-0052: Port5: SERDES auto-selected
  

See also:

• linux/vlan
• OpenWrt/swconfig

GW16104 PoE Module

The GW16104 is an optional Power over Ethernet (PoE) module for the GW16083 Ethernet expansion mezzanine providing the following features:

• 44VDC to 57VDC power input (provided via the J11 barrel jack connector or the J6 2-pin connector on the GW16083)
• 44W PoE to Ethernet ports 1 through 4
• 802.3af and 802.3at compatible
• dip switch for configuration (802.3af vs 802.3at mode, power limits)

Refer to the GW16083 Hardware manual for more details