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Add support for more than one Super I/O or EC per machine

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Flashrom currently only supports exactly one Super I/O or Embedded
Controller, and this means quite a few notebooks and a small subset of
desktop/server boards cannot be handled reliably and easily.
Allow detection and initialization of up to 3 Super I/O and/or EC chips.

WARNING! If a Super I/O or EC responds on multiple ports (0x2e and
0x4e), the code will do the wrong thing (namely, initialize the hardware
twice). I have no idea if we should handle such situations, and whether
we should ignore the second chip with identical ID or not. Initializing
the hardware twice for the IT87* family is _not_ a problem, but I don't
know how well IT85* can handle it (and whether IT85* would listen at
more than one port anyway).

Corresponding to flashrom svn r1289.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

Thanks to Thomas Schneider for testing on a board with ITE IT87* SPI.
Test report (success) is here: http://paste.flashrom.org/view.php?id=379

Thanks to David Hendricks for testing on a Google Cr-48 laptop with
ITE IT85* EC SPI. Test report (success) is here:
http://www.flashrom.org/pipermail/flashrom/2011-April/006275.html
Acked-by: David Hendricks <dhendrix@google.com>
This commit is contained in:
Carl-Daniel Hailfinger
2011-04-27 14:34:08 +00:00
parent 880e867ae8
commit bfecef6986
6 changed files with 92 additions and 157 deletions
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18
internal.c
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@ -99,17 +99,29 @@ int force_boardenable = 0;
int force_boardmismatch = 0;
#if defined(__i386__) || defined(__x86_64__)
struct superio superio = {};
void probe_superio(void)
{
superio = probe_superio_ite();
probe_superio_ite();
#if 0
/* Winbond Super I/O code is not yet available. */
if (superio.vendor == SUPERIO_VENDOR_NONE)
superio = probe_superio_winbond();
#endif
}
int superio_count = 0;
#define SUPERIO_MAX_COUNT 3
struct superio superios[SUPERIO_MAX_COUNT];
int register_superio(struct superio s)
{
if (superio_count == SUPERIO_MAX_COUNT)
return 1;
superios[superio_count++] = s;
return 0;
}
#endif
int is_laptop = 0;