soc/intel/cannonlake: Add support to log XHCI wake events

Enhance elog wake source information with more details about which USB port
resulted in a wake from S3 or S0ix.

BUG=b:123429132
BRANCH=none
TEST=``FW_NAME=hatch emerge-hatch chromeos-ec depthcharge vboot_reference
libpayload coreboot-private-files intel-cmlfsp coreboot-private-files-hatch
coreboot chromeos-bootimage``
Ensure /build/hatch/firmware/image-hatch.serial.bin has been built.

Plug a keyboard into a USB port on the DUT.
Switch the DUT to the console (Ctrl-Alt-F2, or use the AP console via
servo).
On the console, run ``powerd_dbus_suspend``.
Wait for the DUT to enter low power mode.
Verify low power mode by issuing the ``powerinfo`` command on the EC
console (via servo). Expect to see ``power state 4 = S0ix``.
Press a key on the USB keyboard.
The DUT wakes up.
On the console, run ``mosys eventlog list`` and look for the wake source.

156 | 2019-06-26 09:46:07 | S0ix Enter
157 | 2019-06-26 12:14:05 | S0ix Exit
158 | 2019-06-26 12:14:05 | Wake Source | Internal PME | 0
159 | 2019-06-26 12:14:05 | Wake Source | GPE # | 109

Program image-hatch.serial.bin into the DUT using flashrom.
Repeat the ``powerd_dbus_suspend``, ``powerinfo``, ``mosys eventlog list``
sequence.

12 | 2019-06-26 14:52:23 | S0ix Enter
13 | 2019-06-26 14:53:07 | S0ix Exit
14 | 2019-06-26 14:53:07 | Wake Source | PME - XHCI (USB 2.0 port) | 3
15 | 2019-06-26 14:53:07 | Wake Source | GPE # | 109

Change-Id: Ie9ef870e219733dea9806c766f5351db25689b32
Signed-off-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33843
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

0 files changed, 0 insertions, 0 deletions