Change in coreboot[4.11_branch]: mb/fb/watson: enable IPMI_KCS for watson_v2

[Angel Pons (Code Review)]

Angel Pons has submitted this change. ( https://review.coreboot.org/c/coreboot/+/51310 )

Change subject: mb/fb/watson: enable IPMI_KCS for watson_v2
......................................................................

mb/fb/watson: enable IPMI_KCS for watson_v2

For watson_v2 mainboard variant:
* Enable IPMI_KCS in config.
* In early_mainboard_romstage_entry(), enable LPC IO ports
for IPMI over KCS.

Signed-off-by: Ravi Rama 
Signed-off-by: Jonathan Zhang 
Change-Id: Ie0e718b44889678c49f3d61cccd0e33b306fc6f3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51310
Reviewed-by: Angel Pons 
Reviewed-by: Christian Walter 
Tested-by: build bot (Jenkins) 
---
M src/mainboard/facebook/watson/Kconfig
M src/mainboard/facebook/watson/include/variants.h
M src/mainboard/facebook/watson/romstage.c
M src/mainboard/facebook/watson/variants/watson_v2/romstage.c
4 files changed, 20 insertions(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Angel Pons: Looks good to me, approved
  Christian Walter: Looks good to me, approved

diff --git a/src/mainboard/facebook/watson/Kconfig b/src/mainboard/facebook/watson/Kconfig
index 2ebc020..919117d 100644
--- a/src/mainboard/facebook/watson/Kconfig
+++ b/src/mainboard/facebook/watson/Kconfig
@@ -16,6 +16,7 @@
    select HAVE_ACPI_TABLES
    select HAVE_OPTION_TABLE
    select INTEGRATED_UART
+	select IPMI_KCS if BOARD_FACEBOOK_WATSON_V2
    select SERIRQ_CONTINUOUS_MODE
    select MAINBOARD_USES_IFD_GBE_REGION
    select MAINBOARD_HAS_LPC_TPM
diff --git a/src/mainboard/facebook/watson/include/variants.h b/src/mainboard/facebook/watson/include/variants.h
index 4698916..d364b8b 100644
--- a/src/mainboard/facebook/watson/include/variants.h
+++ b/src/mainboard/facebook/watson/include/variants.h
@@ -21,5 +21,6 @@
 #include <soc/romstage.h>

void variant_romstage_fsp_init_params(UPD_DATA_REGION *UpdData);
+void variant_early_mainboard_romstage_entry(void);

#endif /* BASEBOARD_VARIANTS_H */
diff --git a/src/mainboard/facebook/watson/romstage.c b/src/mainboard/facebook/watson/romstage.c
index b8df798..d65ac0e 100644
--- a/src/mainboard/facebook/watson/romstage.c
+++ b/src/mainboard/facebook/watson/romstage.c
@@ -25,7 +25,7 @@
  */
 void early_mainboard_romstage_entry(void)
 {
-
+	variant_early_mainboard_romstage_entry();
 }

/**
@@ -52,3 +52,8 @@
 {

}
+
+__weak void variant_early_mainboard_romstage_entry(void)
+{
+
+}
diff --git a/src/mainboard/facebook/watson/variants/watson_v2/romstage.c b/src/mainboard/facebook/watson/variants/watson_v2/romstage.c
index 55f3025..2e571b9 100644
--- a/src/mainboard/facebook/watson/variants/watson_v2/romstage.c
+++ b/src/mainboard/facebook/watson/variants/watson_v2/romstage.c
@@ -15,6 +15,9 @@
  * GNU General Public License for more details.
  */

+#include <device/pci_ops.h>
+#include <soc/lpc.h>
+#include <soc/pci_devs.h>
 #include <soc/romstage.h>
 #include <variants.h>

@@ -46,3 +49,12 @@
    UpdData->HotPlug_PchPciPort7 = 1;
    UpdData->HotPlug_PchPciPort8 = 1;
 }
+
+void variant_early_mainboard_romstage_entry(void)
+{
+	// Enable LPC IO ports 0xca2, 0xca8 for IPMI
+	pci_write_config32(PCH_DEV_LPC, LPC_GEN2_DEC,
+		(0 << 16) | ALIGN_DOWN(0xca2, 4) | 1);
+	pci_write_config32(PCH_DEV_LPC, LPC_GEN3_DEC,
+		(0 << 16) | ALIGN_DOWN(0xca8, 4) | 1);
+}