any progress on sa 8300/4250

[Skillet50]

IDCODE 10001B4B is consistant, but have never seen impcode.
bl nand

~ attribute ~\ value \

-------------------------------

{"total blocks" }[ 0x00000400 ]

{"page size" }[ 0x00000800 ]

{"page count" }[ 0x0040 ]

{"boot size" }[ 0x00000100 ]

{"spare start" }[ 0x00000200 ]
Just a sample of what I can get out of the Serial Port. Will gladly get into the donating side, just need an address.

[Skillet50]

and thanks to Merkin....
#define CALLIOPE_IO_BASE 0x08000000

and the serial port says....
flash

$ serial | NAND $

\type Size|type Size\

---------------------------------------

[AMTEL 2048|ST 131072]

*0*

[merkin]

So this box has nand and spi flash.

Are you familiar with how to use 'tap' commands with usbjtagnt?

If you want to donate just pm usbbdm.

[Skillet50]

I've only seen tap c and tap a ffffffff in the forums. I believe it was to get debug/trap on and yes just tried it and debug changed to on then box reset and turned it back off. That's as familiar as I am. What different things can be done is a mystery to me.

[merkin]

yeah gotta teach yourself, have doubt that anyone here can explain it, but usbbdm.

so here goes
"tap c" is ejtag boot instruction and

"tap a" selects the ejtag control register with value "ffffffff"
you can read page 100 for explanation of all 32 bits here: http://downloads.buffalo.nas-central.or ... -03.10.pdf

similarly "tap 1" and "tap 3" accesses the IDCODE and IMPCODE registers, respectively.
so you can manually try reading IMPCODE and you should also receive the same IDCODE.

[Skillet50]

-detect
IDCODE 10001B4B
Manufacturer not found 5A5
-tap 1
Eco :10001B4B
-tap 3
Eco :60414000
So Impcode is 60414000 for the MIPS JTAG PORT.The Boss is still working on the ST-40 cores there are some results over in the SAT forums

[merkin]

Very strange that you are not getting an IMPCODE when you detect, but it works with "tap 3"

Anyway 0x60414000 = 1100000010000010100000000000000

So here is the register map


It looks like valid IMPCODE...Good Job!

[usbbdm]

I am actively working on ST40 core. However if it is ST40 core, no need to work on IMPCODE. That is for MIPS core.

[merkin]

... no need to work on IMPCODE. That is for MIPS core.

Yeah, no kidding and we already confirmed mips ejtag port is working.
Calliope cpu is under linux-2.6/arch/mips/powertv/asic/
http://kerneldox.com/kdox-linux-2.6/dir ... 09908.html

So where is the confusion?

[usbbdm]

Yeah, no kidding and we already confirmed mips ejtag port is working.
Calliope cpu is under linux-2.6/arch/mips/powertv/asic/
http://kerneldox.com/kdox-linux-2.6/dir ... 09908.html

So where is the confusion?

Confusion is that someone said it is ST40 core not MIPS core.

[merkin]

Well if you look back at schematic, this asic cpu appears to have two seperate debug modules.
Why not accept donation since the mips port is active?

This will be first cablecard box with ejtag access.

[Skillet50]

It's two mints in one...... This is the Calliope. Earlier boxes used an Atlas (EXP-XXXX boxes the Thread starter) the HDMI boxes use the Cronus and I believe the RNG200N uses a Zeus...

[usbbdm]

Well if you look back at schematic, this asic cpu appears to have two seperate debug modules.
Why not accept donation since the mips port is active?

This will be first cablecard box with ejtag access.

I am having some board with me now and stuck on the ST40. I am afraid I will not work on it right away.
If there is already one MIPS core, why not hook up JTAG NT and see if you can get DEBUG ON. (Trap ON need proper xml, DEBUG ON normally do not).

From what I see here is the CPU ID might not be right yet. This could indicate different flavor of MIPS core if it is MIPS core.

[merkin]

okay wait for st40 support first.

1. Why does the user not get IMPCODE when 'detect'?

2. But 'tap 3' shows valid IMPCODE?

3. What bits of IDCODE look wrong?

[usbbdm]

IDCODE 10001B4B
Manufacturer not found 5A5

The parts number seems odd but I could be wrong. What CPU is this? If you define it properly in vender.xml you might get IMPCODE detection.