From 026e940f03107cdd32b6f479134d1b61f700a3de Mon Sep 17 00:00:00 2001 From: Ben Chuang Date: Thu, 16 Jul 2020 11:34:36 +0800 Subject: drivers/genesyslogic/gl9763e: Add driver for Genesys Logic GL9763E The device is a PCIe to eMMC bridge controller to be used in the Chromebook as the boot disk. The datasheet name is GL9763E and the revision is 02. The patch sets single request AXI, disables ASPM L0s and enables SSC. Signed-off-by: Ben Chuang Change-Id: I158c79f5ac6e559f335b6b50092469c7b1646c56 Reviewed-on: https://review.coreboot.org/c/coreboot/+/43751 Tested-by: build bot (Jenkins) Reviewed-by: Angel Pons Reviewed-by: Aaron Durbin --- src/drivers/genesyslogic/gl9763e/gl9763e.c | 53 ++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 src/drivers/genesyslogic/gl9763e/gl9763e.c (limited to 'src/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 +#include +#include +#include +#include +#include +#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") +}; -- cgit v1.2.3