[coreboot-gerrit] Change in coreboot[master]: drivers/genesyslogic/gl9755: Add driver for Genesys Logic GL9755

[Ben Chuang (Code Review)]

Ben Chuang has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/45062 )

Change subject: drivers/genesyslogic/gl9755: Add driver for Genesys Logic GL9755
......................................................................

drivers/genesyslogic/gl9755: Add driver for Genesys Logic GL9755

The device is a PCIe Gen2 to SD 4.0 card reader controller to be
used in the Chromebook. The datasheet name is GL9755S the revision
is 05.

The patch sets LTR value.

Signed-off-by: Ben Chuang 
Change-Id: I16048dde348be248c748d50ca4a8a62c8a781430
---
A src/drivers/genesyslogic/gl9755/Kconfig
A src/drivers/genesyslogic/gl9755/Makefile.inc
A src/drivers/genesyslogic/gl9755/gl9755.c
A src/drivers/genesyslogic/gl9755/gl9755.h
M src/include/device/pci_ids.h
5 files changed, 66 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/62/45062/1

diff --git a/src/drivers/genesyslogic/gl9755/Kconfig b/src/drivers/genesyslogic/gl9755/Kconfig
new file mode 100644
index 0000000..0d1fe57
--- /dev/null
+++ b/src/drivers/genesyslogic/gl9755/Kconfig
@@ -0,0 +1,2 @@
+config DRIVERS_GENESYSLOGIC_GL9755
+	bool
diff --git a/src/drivers/genesyslogic/gl9755/Makefile.inc b/src/drivers/genesyslogic/gl9755/Makefile.inc
new file mode 100644
index 0000000..995cfd3
--- /dev/null
+++ b/src/drivers/genesyslogic/gl9755/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_GENESYSLOGIC_GL9755) += gl9755.c
diff --git a/src/drivers/genesyslogic/gl9755/gl9755.c b/src/drivers/genesyslogic/gl9755/gl9755.c
new file mode 100644
index 0000000..f66344b
--- /dev/null
+++ b/src/drivers/genesyslogic/gl9755/gl9755.c
@@ -0,0 +1,47 @@
+/* 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 "gl9755.h"
+
+static void gl9755_init(struct device *dev)
+{
+	printk(BIOS_INFO, "GL9755: init\n");
+	pci_dev_init(dev);
+
+	/* Set Vendor Config to be configurable */
+	pci_or_config32(dev, CFG, CFG_EN);
+	/* Set LTR value */
+	pci_update_config32(dev, LTR, 0, NO_SNOOP_SCALE|NO_SNOOP_VALUE|SNOOP_SCALE|SNOOP_VALUE);
+	/* Set Vendor Config to be non-configurable */
+	pci_and_config32(dev, CFG, ~CFG_EN);
+}
+
+static struct device_operations gl9755_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			= gl9755_init,
+};
+
+static const unsigned short pci_device_ids[] = {
+	PCI_DEVICE_ID_GLI_9755,
+	0
+};
+
+static const struct pci_driver genesyslogic_gl9755 __pci_driver = {
+	.ops		= &gl9755_ops,
+	.vendor		= PCI_VENDOR_ID_GLI,
+	.devices	= pci_device_ids,
+};
+
+struct chip_operations drivers_generic_genesyslogic_gl9755_ops = {
+	CHIP_NAME("Genesys Logic GL9755")
+};
diff --git a/src/drivers/genesyslogic/gl9755/gl9755.h b/src/drivers/genesyslogic/gl9755/gl9755.h
new file mode 100644
index 0000000..04d25ef
--- /dev/null
+++ b/src/drivers/genesyslogic/gl9755/gl9755.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* Definitions for Genesys Logic GL9755 */
+
+#include <types.h>
+
+#define CFG          0x800
+#define  CFG_EN          0x1
+#define LTR             0x5C
+#define   SNOOP_VALUE   0x25
+#define   SNOOP_SCALE   (0x3 << 10)
+#define   NO_SNOOP_VALUE   (0x25 << 16)
+#define   NO_SNOOP_SCALE   (0x3  << 26)
+
+
diff --git a/src/include/device/pci_ids.h b/src/include/device/pci_ids.h
index 5aaf7b3..9b45d7e 100644
--- a/src/include/device/pci_ids.h
+++ b/src/include/device/pci_ids.h
@@ -2035,6 +2035,7 @@

#define PCI_VENDOR_ID_GLI		0x17a0
 #define PCI_DEVICE_ID_GLI_9763E		0xe763
+#define PCI_DEVICE_ID_GLI_9755		0x9755

#define PCI_VENDOR_ID_XGI		0x18ca
 #define PCI_DEVICE_ID_XGI_20		0x0020