soc/amd/morgana: Add initial commit for new SoC

This is an initial framework for the Morgana SoC.

TODOs have been added to the files for both customization and
commonization.

Signed-off-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
Change-Id: If92e129db10d41595e1dc18a7c1dfe99d57790cc
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68195
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/src/soc/amd/morgana/espi_util.c b/src/soc/amd/morgana/espi_util.c
new file mode 100644
index 0000000000..1d0fc1731a
--- /dev/null
+++ b/src/soc/amd/morgana/espi_util.c
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* TODO: Update for Morgana */
+
+#include <amdblocks/spi.h>
+#include <soc/espi.h>
+#include <types.h>
+
+#define ESPI_CNTRL_REGISTER	0x10
+#define  LOCK_SPIX10_BIT2	BIT(3)
+#define  ESPI_MUX_SPI1		BIT(2)
+#define  ROM_ADDR_WR_PROT	BIT(1)
+#define  DIS_ESPI_MASCTL_REG_WR	BIT(0)
+
+void espi_switch_to_spi1_pads(void)
+{
+	uint8_t reg = spi_read8(ESPI_CNTRL_REGISTER);
+
+	reg |= ESPI_MUX_SPI1;
+
+	spi_write8(ESPI_CNTRL_REGISTER, reg);
+}