/* 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_enable(struct device *dev) { uint32_t reg; printk(BIOS_INFO, "GL9755: configure ASPM and LTR\n"); /* 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); /* Adjust L1 exit latency to enable ASPM */ reg = pci_read_config32(dev, CFG2); reg &= ~CFG2_LAT_L1_MASK; reg |= CFG2_LAT_L1_64US; pci_write_config32(dev, CFG2, reg); /* Disable ASPM L0s support */ pci_and_config32(dev, CFG2, ~CFG2_L0S_SUPPORT); /* Turn off debug mode to enable SCP/OCP */ pci_and_config32(dev, CFG3, ~SCP_DEBUG); /* 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, .enable = gl9755_enable }; 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") };