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Enable the SHI interrupt only after we have received and begun processing our host command. Disable the SHI interrupt once our transaction is complete (with either success or error status). This will prevent the SHI interrupt from being asserted at the same time as the CS interrupt, which can lead to the SHI interrupt being serviced first. Also, it avoids needless, non-useful SHI interrupts during error transactions. BUG=chrome-os-partner:55710,chrome-os-partner:55795,chrome-os-partner:56254 BRANCH=None TEST=Manual on gru. Stress test flashrom w/ unpowered Donette attached (for host command spam), verify no errors encountered after 100 minutes. Also verify host command interface functions properly after sysjump. Change-Id: I41e3deb382897cd4286e6ac96f4f3066bf7a94a7 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/371510 Reviewed-by: Aseda Aboagye <aaboagye@chromium.org> Reviewed-by: Mulin Chao <mlchao@nuvoton.com>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly