siemens/nc_fpga: Set FW_DONE bit before jumping to payload

Once coreboot is ready and payload has been loaded a bit inside the NC
FPGA needs to be set to notify this event. As there are NC FPGAs with
different PCI device IDs save the BAR0 address in a global variable once
the driver evaluates this address. It can then be used to access the
register from the boot state machine callback without the need of searching
for all possible PCI devices again.

As this driver is only used at ramstage there is no need of using
CAR_GLOBAL for the global variable. Use a Kconfig switch to make this
feature selectable from mainboard as not every mainboard may have a FPGA
with that capability.

Change-Id: I9cd09e7051edde30d144a7e020b84bb549e9e8b9
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/22138
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/drivers/siemens/nc_fpga/nc_fpga.h b/src/drivers/siemens/nc_fpga/nc_fpga.h
index 7bf087b69a..8a98627889 100644
--- a/src/drivers/siemens/nc_fpga/nc_fpga.h
+++ b/src/drivers/siemens/nc_fpga/nc_fpga.h
@@ -26,6 +26,8 @@
 #define  NC_CAP1_FAN_CTRL		0x080
 #define  NC_CAP1_TEMP_MON		0x100
 #define NC_DSAVE_OFFSET			0x58
+#define NC_DIAG_CTRL_OFFSET		0x60
+#define  NC_DIAG_FW_DONE		0x10000
 #define NC_BL_BRIGHTNESS_OFFSET		0x88
 #define NC_BL_PWM_OFFSET		0x8C
 #define NC_FANMON_CTRL_OFFSET		0x400