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PD accessories that are RW update-able will broadcast their rw_hash SHA1 digest upon connection to the PD MCU which will store it. For update purposes, the host needs that accessories device id and rw_hash to determine its proper firmware update payload. This CL creates a host command that requests the type-C accessory info attached to a particular port. It also implements an ectool command to expose the host command. BRANCH=none BUG=chrome-os-partner:31361 TEST=manual, # connect zinger to port 1 on samus ectool --dev=1 --interface=lpc infopddev 1 Port:0 Device:1 Hash: 0x7f4d7a13 0xf07b65b9 0x41181e10 0xb99b3d5f 0x9dee1206 ectool --dev=1 --interface=lpc infopddev 0 Port:0 has no valid device Also do the same on port 0 with similar results. Change-Id: Id63c7edad77a43d43c14d8cd6bd96e08d0d9b501 Signed-off-by: Todd Broch <tbroch@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/216814 Reviewed-by: Alec Berg <alecaberg@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit