usb4.c

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <acpi/acpigen.h>
#include <acpi/acpi_device.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_def.h>
#include <device/pci_ids.h>
#include <intelblocks/tcss.h>
#include <soc/pci_devs.h>
 
#define INTEL_TBT_IMR_VALID_UUID        "C44D002F-69F9-4E7D-A904-A7BAABDF43F7"
#define INTEL_TBT_WAKE_SUPPORTED_UUID   "6C501103-C189-4296-BA72-9BF5A26EBE5D"
 
#if CONFIG(HAVE_ACPI_TABLES)
static const char *tbt_dma_acpi_name(const struct device *dev)
{
        switch (dev->path.pci.devfn) {
        case SA_DEVFN_TCSS_DMA0:
                return "TDM0";
        case SA_DEVFN_TCSS_DMA1:
                return "TDM1";
        default:
                return NULL;
        }
}
 
static void tbt_dma_fill_ssdt(const struct device *dev)
{
        struct acpi_dp *dsd, *pkg;
 
        if (tcss_ops.valid_tbt_auth && !tcss_ops.valid_tbt_auth())
                return;
 
        acpigen_write_scope(acpi_device_path(dev));
 
        dsd = acpi_dp_new_table("_DSD");
 
        /* Indicate that device has valid IMR. */
        pkg = acpi_dp_new_table(INTEL_TBT_IMR_VALID_UUID);
        acpi_dp_add_integer(pkg, "IMR_VALID", 1);
        acpi_dp_add_package(dsd, pkg);
 
        /* Indicate that device is wake capable. */
        pkg = acpi_dp_new_table(INTEL_TBT_WAKE_SUPPORTED_UUID);
        acpi_dp_add_integer(pkg, "WAKE_SUPPORTED", 1);
 
        acpi_dp_add_package(dsd, pkg);
        acpi_dp_write(dsd);
 
        acpigen_pop_len(); /* Scope */
}
#endif
 
static const unsigned short pci_device_ids[] = {
        PCI_DID_INTEL_MTL_M_TBT_DMA0,
        PCI_DID_INTEL_MTL_P_TBT_DMA0,
        PCI_DID_INTEL_MTL_P_TBT_DMA1,
        PCI_DID_INTEL_TGL_TBT_DMA0,
        PCI_DID_INTEL_TGL_TBT_DMA1,
        PCI_DID_INTEL_TGL_H_TBT_DMA0,
        PCI_DID_INTEL_TGL_H_TBT_DMA1,
        PCI_DID_INTEL_ADL_TBT_DMA0,
        PCI_DID_INTEL_ADL_TBT_DMA1,
        0
};
 
static struct device_operations usb4_dev_ops = {
        .read_resources         = pci_dev_read_resources,
        .set_resources          = pci_dev_set_resources,
        .enable_resources       = pci_dev_enable_resources,
        .scan_bus               = scan_generic_bus,
        .ops_pci                = &pci_dev_ops_pci,
#if CONFIG(HAVE_ACPI_TABLES)
        .acpi_name              = tbt_dma_acpi_name,
        .acpi_fill_ssdt         = tbt_dma_fill_ssdt,
#endif
};
 
static const struct pci_driver usb4_driver __pci_driver = {
        .ops                    = &usb4_dev_ops,
        .vendor                 = PCI_VID_INTEL,
        .devices                = pci_device_ids,
};