src/soc/intel/denverton_ns/csme_ie_kt.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/pci.h>
   4 #include <device/pci_ids.h>
   5 #include <console/console.h>
   6 #include <soc/pci_devs.h>
   7 #include <soc/ramstage.h>
   8
   9 /**
  10 * Read the base address registers for a given device.
  11 *
  12 * @param dev Pointer to the dev structure.
  13 * @param howmany How many registers to read.
  14 */
  15 static void pci_read_bases(struct device *dev, unsigned int howmany)
  16 {
  17         unsigned long index;
  18
  19         for (index = PCI_BASE_ADDRESS_0;
  20              (index < PCI_BASE_ADDRESS_0 + (howmany << 2));) {
  21                 struct resource *resource;
  22                 resource = pci_get_resource(dev, index);
  23                 /**
  24                 * Workaround for Denverton-NS silicon (Rev A0/A1 for CSME/IE,
  25                 *  Rev B0 for CSME only)
  26                 *  CSME&IEs KT IO bar must be 16-byte aligned
  27                 */
  28                 if ((resource->flags & IORESOURCE_IO) &&
  29                     (resource->align != 4)) {
  30                         printk(BIOS_DEBUG,
  31                                "CSME&IEs KT IO bar must be 16-byte aligned!\n");
  32                         resource->align = 4;
  33                         resource->gran = 4;
  34                         resource->size = 16;
  35                 }
  36                 index += (resource->flags & IORESOURCE_PCI64) ? 8 : 4;
  37         }
  38
  39         compact_resources(dev);
  40 }
  41
  42 static void pci_csme_ie_kt_read_resources(struct device *dev)
  43 {
  44         /**
  45         * CSME/IE KT has 2 BARs to check:
  46         *   0x10 - KT IO BAR
  47         *   0x14 - KT Memory BAR
  48         * CSME/IE KT has no Expansion ROM BAR to check:
  49         *   0x30 - KT Host XRBAR, READ ONLY
  50         */
  51         pci_read_bases(dev, 2);
  52 }
  53
  54 static struct device_operations csme_ie_kt_ops = {
  55         .read_resources = pci_csme_ie_kt_read_resources,
  56         .set_resources = pci_dev_set_resources,
  57         .enable_resources = pci_dev_enable_resources,
  58         .ops_pci = &soc_pci_ops,
  59 };
  60
  61 static const unsigned short pci_device_ids[] = {
  62         PCI_DID_INTEL_DNV_ME_KT,
  63         PCI_DID_INTEL_DNV_IE_KT,
  64         0
  65 };
  66
  67 static const struct pci_driver csme_ie_kt __pci_driver = {
  68         .ops = &csme_ie_kt_ops,
  69         .vendor = PCI_VID_INTEL,
  70         .devices = pci_device_ids,
  71 };