This is happening intermittently:
```
> reset; halt
JTAG scan chain interrogation failed: all ones
Check JTAG interface, timings, target power, etc.
```
along with:
```
> reset; halt
JTAG tap: imx28.cpu tap/device found: 0x079264f3 (mfg: 0x279 (SigmaTel), part: 0x7926, ver: 0x0)
NOTE! Severe performance degradation without fast memory access enabled. Type 'help fast'.
Halt timed out, wake up GDB.
timed out while waiting for target halted
```
which is the problem I was hoping to solve using Glasgow. Just not sure whether to look for the problem in my openocd config, glasgow config, etc! 😄