Re: [coreboot] Trying to flash coreboot onto on-board SPI chip of HP Envy H87 haswell chipset.

[Arpita Biswas]

Hi David,

That did the trick !!! Thanks a bunch ! For anyone else interested, here is
the combination of things I did :

SOIC config as (1) mentioned earlier + held down the power button for 30
sec to reset it + removed CMOS battery + removed jumper on SPI header (that
cuts off the processor signal to SPI chip) + plugged in the power cable
(that way enough power was there throughout the board for dediprog to
detect) + removed the DIM (dunno if that made any difference, but did it
since a post mentioned it anyways!).

Dediprog then detected it sweetly :) :)

Cheers,
- Arpita

On Tue, Oct 20, 2015 at 2:05 PM, David Hendricks 
wrote:
> On Tue, Oct 20, 2015 at 12:26 PM, Arpita Biswas <[e-mail]
> > wrote:
> > Hi all,
> >
> > I am trying to update BIOS with coreboot onto HP Envy H87 haswell
> > chipset (ipm87_mp)
> > http://www.newegg.com/Product/Product.aspx?Item=9SIA6392VN4810. I am
> > using Dediprog + SOIC 8-pin flash clip for flashing the SPI chip (W25Q64).
> > However dediprog doesn't detect the chip when it's soldered on-board. On
> > removing the chip from board, I can detect/read/write onto it without any
> > issues.
> >
> > I've tried (and failed) with the following configurations :
> > (1) SPI pin ------> Dediprog : /CS ---> CS, DO (IO1) ---> MISO, /WP (IO2)
> > ---> 3.3V, GND ---> GND, DI (IO0) ---> MOSI, CLK ---> CLK, /HOLD (IO3) --->
> > 3.3V, VCC ---> 3.3V with motherboard power ON.
> >
> > (2) Same config as above but I tried to isolate the chip by removing CMOS
> > battery + removing jumper on SPI header + powering OFF the motherboard.
> >
> > (3) Similar as (1) and (2), but let /HOLD, /Vcc and /WP float.
> >
> > (4) I tried using flashrom on the box too as internal programmer, but it
> > did not recognize the SPI chip. Error log says "Found Programmer flash chip
> > "Opaque flash chip" (8192 kB, Programmer-specific)."
> >
> > I've a feeling that something on the motherboard is interfering with the
> > SPI chip since an off-board chip is working fine. Does anybody have any
> > pointers on what could be going wrong ?
>
> I suspect your motherboard does not isolate the SPI ROM's voltage supply
> and thus your Dediprog is effectively powering other components on the
> board.
>
> If you can find a way to hold the PCH and ME in reset while the board is
> powered on, that might work. Or, with the board off, you can try using an
> external power supply (the usual warnings about possibly frying your board
> apply).
> > Thanks in advance,
> > Arpita