[coreboot] Probe missing on W49F002U

[Jun Ma]

> What we did:
>
> Use superiotoo to dump the superio. Look at GPIOs. Notice that one,
> and only one,
> GPIO was even enabled. And it was enabled as output.
>
> So we looked at the output value, inverted it, and flashrom worked fine.
>
> This was a few minutes of debugging. It took longer to modify
> superiotool to know about this particular superio than it took to
> figure out how to write enable flash :-)
>
> You'll just need to dump the states of the GPIOs on the SiS part, see
> which ones
> are enabled, see which are enabled as outputs, and for a first try, just
> invert them all ... you can work out which one is controlling it bit by bit.
>

For my poor board with Super I/O chip ITE IT8770F, the superiotool outputs:

Sis530:~/superiotool#
Sis530:~/superiotool# ./superiotool -V
superiotool r
Probing for ALi Super I/O at 0x3f0...
  Failed. Returned data: id=0xffff, rev=0xff
Probing for ALi Super I/O at 0x370...
  Failed. Returned data: id=0xffff, rev=0xff
Probing for Fintek Super I/O at 0x2e...
  Failed. Returned data: vid=0xffff, id=0xffff
Probing for Fintek Super I/O at 0x4e...
  Failed. Returned data: vid=0xffff, id=0xffff
Probing for ITE Super I/O (init=0x87,0x01,0x55,0x55/0xaa) at 0x2e...
  Failed. Returned data: id=0xffff, rev=0xf
Probing for ITE Super I/O (init=0x87,0x87) at 0x2e...
  Failed. Returned data: id=0xffff, rev=0xf
Probing for ITE Super I/O (init=0x87,0x01,0x55,0x55/0xaa) at 0x4e...
  Failed. Returned data: id=0xffff, rev=0xf
Probing for ITE Super I/O (init=0x87,0x87) at 0x4e...
  Failed. Returned data: id=0xffff, rev=0xf
Probing for NSC Super I/O at 0x2e...
  Failed. Returned data: port=0xff, port+1=0xff
Probing for NSC Super I/O at 0x4e...
  Failed. Returned data: port=0xff, port+1=0xff
Probing for SMSC Super I/O (idregs=0x20/0x21) at 0x2e...
  Failed. Returned data: id=0xff, rev=0xff
Probing for SMSC Super I/O (idregs=0x0d/0x0e) at 0x2e...
  Failed. Returned data: id=0xff, rev=0xff
Probing for SMSC Super I/O (idregs=0x20/0x21) at 0x4e...
  Failed. Returned data: id=0xff, rev=0xff
Probing for SMSC Super I/O (idregs=0x0d/0x0e) at 0x4e...
  Failed. Returned data: id=0xff, rev=0xff
Probing for SMSC Super I/O (idregs=0x20/0x21) at 0x162e...
  Failed. Returned data: id=0xff, rev=0xff
Probing for SMSC Super I/O (idregs=0x0d/0x0e) at 0x162e...
  Failed. Returned data: id=0xff, rev=0xff
Probing for SMSC Super I/O (idregs=0x20/0x21) at 0x164e...
  Failed. Returned data: id=0xff, rev=0xff
Probing for SMSC Super I/O (idregs=0x0d/0x0e) at 0x164e...
  Failed. Returned data: id=0xff, rev=0xff
Probing for SMSC Super I/O (idregs=0x20/0x21) at 0x3f0...
  Failed. Returned data: id=0xff, rev=0xff
Probing for SMSC Super I/O (idregs=0x0d/0x0e) at 0x3f0...
  Failed. Returned data: id=0xff, rev=0xff
Probing for SMSC Super I/O (idregs=0x20/0x21) at 0x370...
  Failed. Returned data: id=0xff, rev=0xff
Probing for SMSC Super I/O (idregs=0x0d/0x0e) at 0x370...
  Failed. Returned data: id=0xff, rev=0xff
Probing for Winbond Super I/O (init=0x88) at 0x2e...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x89) at 0x2e...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x86,0x86) at 0x2e...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x87,0x87) at 0x2e...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x88) at 0x4e...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x89) at 0x4e...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x86,0x86) at 0x4e...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x87,0x87) at 0x4e...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x88) at 0x3f0...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x89) at 0x3f0...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x86,0x86) at 0x3f0...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x87,0x87) at 0x3f0...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x88) at 0x370...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x89) at 0x370...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x86,0x86) at 0x370...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x87,0x87) at 0x370...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x88) at 0x250...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x89) at 0x250...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x86,0x86) at 0x250...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
Probing for Winbond Super I/O (init=0x87,0x87) at 0x250...
  Failed. Returned data: id/oldid=0xff/0x0f, rev=0xff
No Super I/O found
Sis530:~/superiotool#


I saw some comments here:
/**
 * IT871[01]F and IT8708F use 0x87, 0x87
 * IT8761F uses 0x87, 0x61, 0x55, 0x55/0xaa
 * IT86xxF series uses different ports
 * IT8661F uses 0x86, 0x61, 0x55/0xaa, 0x55/0xaa and 32 more writes
 * IT8673F uses 0x86, 0x80, 0x55/0xaa, 0x55/0xaa and 32 more writes
 */
static void enter_conf_mode_ite(uint16_t port)
{
	outb(0x87, port);
	outb(0x01, port);
	outb(0x55, port);
	if (port == 0x2e)
		outb(0x55, port);
	else
		outb(0xaa, port);
}

Not support IT8770F(I guessed)?
also I haven't found any DS about IT8770F on internet, seems I am blind now..