Change in coreboot[master]: soc/intel/common/block: tco: enable intruder SMI if selected

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/39264 )

Change subject: soc/intel/common/block: tco: enable intruder SMI if selected
......................................................................

soc/intel/common/block: tco: enable intruder SMI if selected

Set TCO to issue an SMI when the case instrusion switch gets pressed.

The SMI is controlled along with the general TCO SMI Kconfig.

Tested on X11SSM-F.

Change-Id: I3bc62c79ca3dc9e8896d9e2b9abdc14cfa46a9e7
Signed-off-by: Michael Niewöhner 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39264
Tested-by: build bot (Jenkins) 
Reviewed-by: Aaron Durbin 
---
M src/soc/intel/common/block/smbus/tco.c
1 file changed, 17 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Aaron Durbin: Looks good to me, approved

diff --git a/src/soc/intel/common/block/smbus/tco.c b/src/soc/intel/common/block/smbus/tco.c
index bd8790a..2c0b760 100644
--- a/src/soc/intel/common/block/smbus/tco.c
+++ b/src/soc/intel/common/block/smbus/tco.c
@@ -19,6 +19,7 @@
 #include <device/pci.h>
 #include <device/pci_def.h>
 #include <intelblocks/pcr.h>
+#include <intelblocks/pmclib.h>
 #include <intelblocks/tco.h>
 #include <soc/iomap.h>
 #include <soc/pci_devs.h>
@@ -96,6 +97,18 @@
    tco_write_reg(TCO1_CNT, tcocnt);
 }

+/* Enable and initialize TCO intruder SMI */
+static void tco_intruder_smi_enable(void)
+{
+	uint16_t tcocnt;
+
+	/* Make TCO issue an SMI on INTRD_DET assertion */
+	tcocnt = tco_read_reg(TCO2_CNT);
+	tcocnt &= ~TCO_INTRD_SEL_MASK;
+	tcocnt |= TCO_INTRD_SEL_SMI;
+	tco_write_reg(TCO2_CNT, tcocnt);
+}
+
 /* Enable TCO BAR using SMBUS TCO base to access TCO related register */
 static void tco_enable_bar(void)
 {
@@ -137,4 +150,8 @@
    	tco_enable_bar();

tco_timer_disable();
+
+	/* Enable intruder interrupt if TCO interrupts are enabled*/
+	if (CONFIG(SOC_INTEL_COMMON_BLOCK_SMM_TCO_ENABLE))
+		tco_intruder_smi_enable();
 }