| Age | Commit message (Collapse) | Author |
|---|
|
There is a whole bunch of pads being configured by the vendor firmware
that are either unconnected due to unpopulated resistor pads, only
connected to test points for vendor debugging purposes or just used as
strap. Configure them as NC with an appropriate pull to disable the
RX/TX functions.
The pads have been determined by dissecting a dead board.
This patch has been tested thoughroughly on a machine, normally used
productive, to see if any issues arise. No problems occurred at all.
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Change-Id: I06b942e3182469f87e41914c893e5b485ccca420
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48100
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
|
|
Correct unconnected pads that are configured different currently by
copying vendor configuration while porting the board.
Add internal pull resistors to all unconnected pads, that do not have an
external pull resistor, to prevent floating.
The pads have been determined by dissecting a dead board. This commit
only changes pads, that are not connected at all and don't have any via,
so we can be absolutely sure there is no other connection.
Change-Id: I991fe270b42f430f7447712236e0f80b3d5bba2a
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48099
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
|
|
(Re)configure various pads found by dissecting a dead board and vendor
firmware, as well as the BMC firmware:
- GPP_B14: input connected to jumper JBR1 - could be used to implement
"BIOS Recovery" ("Top-Block Swap") functionality; external pull-up
- GPP_C20: output to BMC alert CPU_THROTTLED# - can be used to notify
the BMC about a thermal throttling event. Not implemented in vendor
firmware.
- GPP_C23: input connected to the CPU's CATERR# output; external pull-up
Not actively used by vendor firmware.
- GPP_D1: output connected to on-board and front panel power LEDs
- GPP_D18: output connected to PERST# of both CPU PCIe Slots. Can be
used for testing/debugging only, since it resets both slots at once.
Not actively used by vendor firmware.
- GPP_D19: output connected to PERST# of both PCH PCIe Slots. Can be
used for testing/debugging only, since it resets both slots at once.
Not actively used by vendor firmware.
- GPP_D22: input connected to the BMC enable/disable jumper JPB1; Will
be used later in CB:48096 and CB:48097; external pull-up
- GPP_G0 - GPP_G3: dedicated/integrated CPU switching; probably not
useful, since the IGD is not connected to any ports on this board.
External pulls ensure correct function of a dGPU even without driving
the gpios. Not used by vendor firmware.
- GPP_G12 - GPP_G16: inputs for binary SKU_ID; external pulls
- GPP_G20: PWRFAIL# input from JPI2C1 (pin 3); external pull-up; Not
used by vendor firmware.
Also add comments for documentation. While at it, mark ME-owned pads as
reserved.
Change-Id: I9f9328e9ce6f7e291b171f776bb98bc617b64b93
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48098
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
|
|
All four SMI/NMI interrupt inputs have an external pull-up resistor and
get triggered by pulling the line low. Thus, correct the trigger to
active-low.
Also document the signals by adding appropriate comments.
The pads' connections have been determined by dissecting a dead board.
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Change-Id: Id1a8c1e0b9fe723a15d04a88d565a53eeba9b085
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48093
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
|
|
Rework gpio setup for the board series to not use headers but
stage-specific compilation units.
Tested successfully on X11SSM-F.
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Change-Id: Ic62ce4335af605c081ef288e892441585ff2bd3e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48087
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
|
