21dde8b25f
The Google "Wilco" Embedded Controller is a new embedded controller that will be used in some future devices. The mailbox interface is simliar to the existing Chromium EC protocol version 3, but not close enough that it was convenient to re-use the full Chrome EC driver. This commit adds the basic mailbox interface for ramstage which will be used by future commits to send varous mailbox commands during the boot process. The IO base addresses for the mailbox interface are defined in Kconfig so they can be changed by the mainboard if needed. Change-Id: I8520dadfa982c9d14357cf2aa644e255cef425c2 Signed-off-by: Duncan Laurie <dlaurie@google.com> Reviewed-on: https://review.coreboot.org/29113 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
47 lines
1.3 KiB
Text
47 lines
1.3 KiB
Text
config EC_GOOGLE_WILCO
|
|
bool
|
|
default n
|
|
select EC_GOOGLE_COMMON_MEC
|
|
help
|
|
Google Wilco Embedded Controller interface.
|
|
|
|
config EC_BASE_ACPI_DATA
|
|
hex
|
|
default 0x930
|
|
help
|
|
This option provides the 16-bit IO base address for the ACPI
|
|
data interface. This is the standard ACPI EC interface that
|
|
is used by the ACPI EC drivers in the OS.
|
|
|
|
config EC_BASE_ACPI_COMMAND
|
|
hex
|
|
default 0x934
|
|
help
|
|
This option provides the 16-bit IO base address for the ACPI
|
|
EC command interface. This is the standard ACPI EC interface
|
|
that is used by the ACPI EC drivers in the OS.
|
|
|
|
config EC_BASE_HOST_DATA
|
|
hex
|
|
default 0x940
|
|
help
|
|
This option provides the 16-bit IO base address for the host
|
|
data interface. This is the interface that is used to drive
|
|
the mailbox protocol.
|
|
|
|
config EC_BASE_HOST_COMMAND
|
|
hex
|
|
default 0x944
|
|
help
|
|
This option provides the 16-bit IO base address for the host
|
|
command interface. This is the interface that is used to drive
|
|
the mailbox protocol.
|
|
|
|
config EC_BASE_PACKET
|
|
hex
|
|
default 0x950
|
|
help
|
|
This option provides the 16-bit IO base address for the EC
|
|
mailbox interface data region. This data buffer is used along
|
|
with the host command and data registers to drive the EC
|
|
mailbox interface. This is also the MEC EMI base address.
|