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>
Fix a few typos.
Change the EC memory region mapping name.
Drop unused function parameter.
Use mmio_writeb()/mmio_readb() to get reliable access to volatile memory
locations instead of plain pointer access which is optimized away by gcc.
Use own it85_* SPI high-level chip read/write functions instead of
relying on unrelated ICH functions.
Corresponding to flashrom svn r1279.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
David writes:
I applied the patch against the Chromium OS branch and
successfully tested read and write operations on a Cr48.
Acked-by: David Hendricks <dhendrix@google.com>
This code has been deployed and tested to work on the Cr-48.
There are a few caveats, though:
- The boot BIOS straps register must be modified to select LPC. This
can be done with the "select_bbs.sh" script (Install iotools at
http://code.google.com/p/iotools/ before using select_bbs).
- It is very important to disable power management daemons before
running flashrom on this EC. I commented out the brute force method
we use in the Chromium OS branch that disables powerd, since IIRC
Carl-Daniel has a better approach in the works.
- Due to dependencies which may be introduced by the OEM/ODM EC
firmware, the code is not guaranteed to work for anything other than
the Cr-48.
Corresponding to flashrom svn r1263.
Signed-off-by: David Hendricks <dhendrix@google.com>
Carl-Daniel comments:
Code is not hooked up yet because probing needs to be sorted out.
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
The patch was developed by Google.
It was tested for IT8500E on a Chrome OS platform and may require
modification depending on ODM/OEM customization and EC firmware version.
This patch is not officially supported by ITE Tech Inc.
Corresponding to flashrom svn r1262.
Signed-off-by: Donald Huang <donald.huang@ite.com.tw>
Signed-off-by: Yung-chieh Lo <yjlou@google.com>
Signed-off-by: David Hendricks <dhendrix@google.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
