csme_ie_kt.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#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_DID_INTEL_DNV_ME_KT,
        PCI_DID_INTEL_DNV_IE_KT,
        0
};
 
static const struct pci_driver csme_ie_kt __pci_driver = {
        .ops = &csme_ie_kt_ops,
        .vendor = PCI_VID_INTEL,
        .devices = pci_device_ids,
};