| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <stdint.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <console/console.h> |
| #include <soc/pci_devs.h> |
| #include <soc/ramstage.h> |
| |
| /** |
| * Read the base address registers for a given device. |
| * |
| * @param dev Pointer to the dev structure. |
| * @param howmany How many registers to read. |
| */ |
| static void pci_read_bases(struct device *dev, unsigned int howmany) |
| { |
| unsigned long index; |
| |
| for (index = PCI_BASE_ADDRESS_0; |
| (index < PCI_BASE_ADDRESS_0 + (howmany << 2));) { |
| struct resource *resource; |
| resource = pci_get_resource(dev, index); |
| /** |
| * Workaround for Denverton-NS silicon (Rev A0/A1 for CSME/IE, |
| * Rev B0 for CSME only) |
| * CSME&IEs KT IO bar must be 16-byte aligned |
| */ |
| if ((resource->flags & IORESOURCE_IO) && |
| (resource->align != 4)) { |
| printk(BIOS_DEBUG, |
| "CSME&IEs KT IO bar must be 16-byte aligned!\n"); |
| resource->align = 4; |
| resource->gran = 4; |
| resource->size = 16; |
| } |
| index += (resource->flags & IORESOURCE_PCI64) ? 8 : 4; |
| } |
| |
| compact_resources(dev); |
| } |
| |
| static void pci_csme_ie_kt_read_resources(struct device *dev) |
| { |
| /** |
| * CSME/IE KT has 2 BARs to check: |
| * 0x10 - KT IO BAR |
| * 0x14 - KT Memory BAR |
| * CSME/IE KT has no Expansion ROM BAR to check: |
| * 0x30 - KT Host XRBAR, READ ONLY |
| */ |
| pci_read_bases(dev, 2); |
| } |
| |
| static struct device_operations csme_ie_kt_ops = { |
| .read_resources = pci_csme_ie_kt_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .ops_pci = &soc_pci_ops, |
| }; |
| |
| static const unsigned short pci_device_ids[] = { |
| PCI_DEVICE_ID_INTEL_DENVERTON_ME_KT, |
| PCI_DEVICE_ID_INTEL_DENVERTON_IE_KT, |
| 0 |
| }; |
| |
| static const struct pci_driver csme_ie_kt __pci_driver = { |
| .ops = &csme_ie_kt_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = pci_device_ids, |
| }; |