4 files changed, 79 insertions, 0 deletions
diff --git a/src/drivers/genesyslogic/gl9763e/Kconfig b/src/drivers/genesyslogic/gl9763e/Kconfig
new file mode 100644
index 0000000000..c254707f66
--- /dev/null
+++ b/src/drivers/genesyslogic/gl9763e/Kconfig
@@ -0,0 +1,2 @@
+config DRIVERS_GENESYSLOGIC_GL9763E
+	bool
diff --git a/src/drivers/genesyslogic/gl9763e/Makefile.inc b/src/drivers/genesyslogic/gl9763e/Makefile.inc
new file mode 100644
index 0000000000..61a63e6231
--- /dev/null
+++ b/src/drivers/genesyslogic/gl9763e/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_GENESYSLOGIC_GL9763E) += gl9763e.c
diff --git a/src/drivers/genesyslogic/gl9763e/gl9763e.c b/src/drivers/genesyslogic/gl9763e/gl9763e.c
new file mode 100644
index 0000000000..48e520bde2
--- /dev/null
+++ b/src/drivers/genesyslogic/gl9763e/gl9763e.c
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* Driver for Genesys Logic GL9763E */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <device/pci.h>
+#include <device/pci_ops.h>
+#include <device/pci_ids.h>
+#include "gl9763e.h"
+
+static void gl9763e_init(struct device *dev)
+{
+	printk(BIOS_INFO, "GL9763E: init\n");
+	pci_dev_init(dev);
+
+	/* Set VHS (Vendor Header Space) to be writable */
+	pci_update_config32(dev, VHS, ~VHS_REV_MASK, VHS_REV_W);
+	/* Set single AXI request */
+	pci_or_config32(dev, SCR, SCR_AXI_REQ);
+	/* Disable L0s support */
+	pci_and_config32(dev, CFG_REG_2, ~CFG_REG_2_L0S);
+	/* Set SSC to 30000 ppm */
+	pci_update_config32(dev, PLL_CTL_2, ~PLL_CTL_2_MAX_SSC_MASK, MAX_SSC_30000PPM);
+	/* Enable SSC */
+	pci_or_config32(dev, PLL_CTL, PLL_CTL_SSC);
+	/* Set VHS to read-only */
+	pci_update_config32(dev, VHS, ~VHS_REV_MASK, VHS_REV_R);
+}
+
+static struct device_operations gl9763e_ops = {
+	.read_resources		= pci_dev_read_resources,
+	.set_resources		= pci_dev_set_resources,
+	.enable_resources	= pci_dev_enable_resources,
+	.ops_pci		= &pci_dev_ops_pci,
+	.init			= gl9763e_init,
+};
+
+static const unsigned short pci_device_ids[] = {
+	PCI_DEVICE_ID_GLI_9763E,
+	0
+};
+
+static const struct pci_driver genesyslogic_gl9763e __pci_driver = {
+	.ops		= &gl9763e_ops,
+	.vendor		= PCI_VENDOR_ID_GLI,
+	.devices	= pci_device_ids,
+};
+
+struct chip_operations drivers_generic_genesyslogic_ops = {
+	CHIP_NAME("Genesys Logic GL9763E")
+};
diff --git a/src/drivers/genesyslogic/gl9763e/gl9763e.h b/src/drivers/genesyslogic/gl9763e/gl9763e.h
new file mode 100644
index 0000000000..fd9c6ba5c2
--- /dev/null
+++ b/src/drivers/genesyslogic/gl9763e/gl9763e.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* Definitions for Genesys Logic GL9763E */
+
+#include <types.h>
+
+#define VHS		0x884
+#define   VHS_REV_MASK	(0xF << 16)
+#define   VHS_REV_R	(0x0 << 16)
+#define   VHS_REV_M	(0x1 << 16)
+#define   VHS_REV_W	(0x2 << 16)
+#define SCR		0x8E0
+#define   SCR_AXI_REQ	BIT(9)
+
+#define CFG_REG_2	0x8A4
+#define   CFG_REG_2_L0S	BIT(11)
+
+#define PLL_CTL		0x938
+#define   PLL_CTL_SSC	BIT(19)
+
+#define PLL_CTL_2			0x93C
+#define   PLL_CTL_2_MAX_SSC_MASK	(0xFFFF << 16)
+#define   MAX_SSC_30000PPM		(0xF5C3 << 16)