Mario Scheithauer has uploaded this change for review.
mb/siemens/mc_ehl2: Adjust Legacy IRQ routing for PCI devices
On this mainboard there is a legacy PCI device, which is connected to
the PCIe root port via a PCIe-2-PCI bridge. This device only supports
legacy interrupt routing. For this reason, we have to adjust the PIR8
register (0x3150) which is responsible for PCIe device 25h. The bridge
is connected to PCIe root port 7.
The following routing is required:
INTA#->PIRQC#, INTB#->PIRQD#, INTC#->PIRQA#, INTD#-> PIRQB#
Change-Id: Id6bb8d00458c4d1e3fefd01ac3848078355868d9
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
---
M src/mainboard/siemens/mc_ehl/variants/mc_ehl2/Makefile.inc
A src/mainboard/siemens/mc_ehl/variants/mc_ehl2/mainboard.c
2 files changed, 16 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/72/58172/1
diff --git a/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/Makefile.inc b/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/Makefile.inc
index 9cb0f1d..2903dd1 100644
--- a/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/Makefile.inc
+++ b/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/Makefile.inc
@@ -3,6 +3,7 @@
bootblock-y += gpio.c
romstage-y += memory.c
ramstage-y += gpio.c
+ramstage-y += mainboard.c
SPD_SOURCES = mc_ehl2 # 0b000
LIB_SPD_DEPS := $(foreach f, $(SPD_SOURCES), \
diff --git a/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/mainboard.c b/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/mainboard.c
new file mode 100644
index 0000000..a58a79e
--- /dev/null
+++ b/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/mainboard.c
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <baseboard/variants.h>
+#include <console/console.h>
+#include <intelblocks/pcr.h>
+#include <soc/pcr_ids.h>
+
+void variant_mainboard_final(void)
+{
+ /* PIR8 register mapping for PCIe root ports
+ * INTA#->PIRQC#, INTB#->PIRQD#, INTC#->PIRQA#, INTD#-> PIRQB#
+ */
+ pcr_write16(PID_ITSS, 0x3150, 0x1032);
+ printk(BIOS_INFO, "PIRQ routing adapted for SOC2\n");
+}
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