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 and the revision
is 05.

The patch sets LTR value.

Signed-off-by: Ben Chuang <benchuanggli@gmail.com>
Change-Id: I16048dde348be248c748d50ca4a8a62c8a781430
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45062
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
This commit is contained in:
Ben Chuang 2020-09-03 16:02:46 +08:00 committed by Tim Wawrzynczak
parent 8ad2b8be25
commit ff17b31dfb
5 changed files with 67 additions and 0 deletions

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config DRIVERS_GENESYSLOGIC_GL9755
bool "Genesys Logic GL9755"
help
GL9755 is a PCI Express Rev. 2.1 compliant card reader controller
which integrates PCI Express PHY, UHS-II PHY, memory card access
interface, regulators (3.3V-to-1.8V and 3.3V-to-1.2V) and card
power switch.

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ramstage-$(CONFIG_DRIVERS_GENESYSLOGIC_GL9755) += gl9755.c

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/* SPDX-License-Identifier: GPL-2.0-only */
/* Driver for Genesys Logic GL9755 */
#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_write_config32(dev, LTR, 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")
};

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/* SPDX-License-Identifier: GPL-2.0-only */
/* Definitions for Genesys Logic GL9755 */
#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)

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#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