soc/fsp_broadwell_de: Add devhide functionality

Add function to hide IIO PCIe root ports.

TEST=On OCP Monolake, hide built-in NIC PCIe root port [0.2.2 and 0.2.3]
and make sure OS does not detect built-in NIC.

Change-Id: I2fcac5b7d9a7a52a2801c010bfccf247f2a44581
Signed-off-by: Andrey Petrov <anpetrov@fb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35321
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/soc/intel/fsp_broadwell_de/ubox.c b/src/soc/intel/fsp_broadwell_de/ubox.c
new file mode 100644
index 0000000000..d7352ad667
--- /dev/null
+++ b/src/soc/intel/fsp_broadwell_de/ubox.c
@@ -0,0 +1,27 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 Facebook Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#define __SIMPLE_DEVICE__
+
+#include <stdint.h>
+#include <soc/ubox.h>
+
+void iio_hide(const uint8_t devno, const uint8_t funcno)
+{
+	pci_devfn_t ubox_dev;
+
+	ubox_dev = PCI_DEV(get_busno1(), UBOX_DEV, UBOX_FUNC);
+	pci_or_config32(ubox_dev, UBOX_DEVHIDE0 + funcno * 4, 1 << devno);
+}