Dell platforms
This page collects information about Dell boards with WPCM450, especially Dell PowerEdge T110.
A tracing tool can be found at src/dellfw.
There are different kinds of remote management firmware for Dell boards:
- BMC, offering only the most basic functionality such as IPMI
- iDRAC6 Express, which adds features such as a web interface
- iDRAC6 Enterprise, with some more features
According to Introduction to iDRAC6, the 100 Series (including T110) only supports BMC firmware. Some of the resulting limitations (such as the lack of a web interface) are purely firmware-based, others (the lack of a dedicated network port) are hardware constraints.
The firmware variant is selected by the presence of iDRAC cards
- Dell system CPLD
- iDRAC LCD, part of the control panel on some servers
| port | offset | I/O | active | description |
|---|---|---|---|---|
| 1 | 9 | input | high | host power is on |
| 2 | 5 | output | low | virtual power button |
- ADC channel 0 monitors the battery
- PWM channel 1 controls fan speed. Higher duty cycle results in lower speed.
- Fan tachometer channel 1 monitors fan speed
This connector appears to be a standard ARM 20-pin JTAG:
(picture courtesy of robot-italy.com)
| Pin | idle | signal | description |
|---|---|---|---|
| 1 | 3.3V | ||
| 2 | 3.3V | TDO | |
| 3 | 3.3V | TDI | |
| 4 | 0V | ||
| 5 | 0V | ||
| 6 | 3.3V | TMS | |
| 7 | 0V | GND | |
| 8 | 0V | TCK |
See also: Dell CPLD
- J_IBMC_MFG enables "manufacturing mode", which means allowing U-Boot interaction^1
- J_IBMC_RST resets the BMC