diff options
| -rw-r--r-- | src/soc/intel/common/block/usb4/Kconfig | 7 | ||||
| -rw-r--r-- | src/soc/intel/common/block/usb4/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/intel/common/block/usb4/chip.h | 13 | ||||
| -rw-r--r-- | src/soc/intel/common/block/usb4/pcie.c | 97 |
4 files changed, 118 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/usb4/Kconfig b/src/soc/intel/common/block/usb4/Kconfig index 1516e758c7..be0b3782b0 100644 --- a/src/soc/intel/common/block/usb4/Kconfig +++ b/src/soc/intel/common/block/usb4/Kconfig @@ -4,3 +4,10 @@ config SOC_INTEL_COMMON_BLOCK_USB4 help Minimal PCI Driver for enabling SSDT generation for the DMA component of Intel Thunderbolt/USB4 ports. + +config SOC_INTEL_COMMON_BLOCK_USB4_PCIE + bool + default n + help + Chip driver for adding PCI ops and SSDT generation for common Intel + USB4/Thunderbolt root ports. diff --git a/src/soc/intel/common/block/usb4/Makefile.inc b/src/soc/intel/common/block/usb4/Makefile.inc index 7dad4ba972..89ce426ae2 100644 --- a/src/soc/intel/common/block/usb4/Makefile.inc +++ b/src/soc/intel/common/block/usb4/Makefile.inc @@ -1 +1,2 @@ ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_USB4) += usb4.c +ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_USB4_PCIE) += pcie.c diff --git a/src/soc/intel/common/block/usb4/chip.h b/src/soc/intel/common/block/usb4/chip.h new file mode 100644 index 0000000000..f2eee4d34c --- /dev/null +++ b/src/soc/intel/common/block/usb4/chip.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#ifndef __DRIVERS_INTEL_USB4_PCIE_H__ +#define __DRIVERS_INTEL_USB4_PCIE_H__ + +struct soc_intel_common_block_usb4_config { + const char *desc; + + /* Pointer to USB4 device that this PCIe root port is routed to. */ + DEVTREE_CONST struct device *usb4_port; +}; + +#endif /* __DRIVERS_INTEL_USB4_PCIE_H__ */ diff --git a/src/soc/intel/common/block/usb4/pcie.c b/src/soc/intel/common/block/usb4/pcie.c new file mode 100644 index 0000000000..e37d5f4125 --- /dev/null +++ b/src/soc/intel/common/block/usb4/pcie.c @@ -0,0 +1,97 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include <acpi/acpigen.h> +#include <console/console.h> +#include <device/device.h> +#include <device/path.h> +#include <device/pci.h> +#include <device/pci_def.h> +#include <device/pci_ids.h> +#include <stdlib.h> +#include <string.h> +#include <types.h> +#include "chip.h" + +#define PCI_HOTPLUG_IN_D3_UUID "6211E2C0-58A3-4AF3-90E1-927A4E0C55A4" +#define PCI_EXTERNAL_PORT_UUID "EFCC06CC-73AC-4BC3-BFF0-76143807C389" + +#if CONFIG(HAVE_ACPI_TABLES) +static void usb4_pcie_fill_ssdt(const struct device *dev) +{ + const struct soc_intel_common_block_usb4_config *config; + const struct device *parent; + struct acpi_dp *dsd, *pkg; + const char *usb4_path; + int port_id; + + /* Get parent PCI device */ + parent = dev->bus->dev; + if (!parent) { + printk(BIOS_ERR, "%s: Unable to find parent device\n", __func__); + return; + } + + if (!dev->enabled || !parent->enabled) + return; + + config = config_of(dev); + if (!config->usb4_port) { + printk(BIOS_ERR, "%s: Unable to find reference to usb4_port\n", __func__); + return; + } + + /* Get ACPI path to USB4 device. */ + usb4_path = acpi_device_path(config->usb4_port); + if (!usb4_path) { + printk(BIOS_ERR, "%s: Unable to find ACPI path for usb4_port\n", __func__); + return; + } + + usb4_path = strdup(usb4_path); + port_id = dev->path.generic.id; + + acpigen_write_scope(acpi_device_path(dev)); + + /* Add pointer to USB4 port controller. */ + dsd = acpi_dp_new_table("_DSD"); + acpi_dp_add_reference(dsd, "usb4-host-interface", usb4_path); + acpi_dp_add_integer(dsd, "usb4-port-number", port_id); + + /* Indicate that device supports hotplug in D3. */ + pkg = acpi_dp_new_table(PCI_HOTPLUG_IN_D3_UUID); + acpi_dp_add_integer(pkg, "HotPlugSupportInD3", 1); + acpi_dp_add_package(dsd, pkg); + + /* Indicate that port is external. */ + pkg = acpi_dp_new_table(PCI_EXTERNAL_PORT_UUID); + acpi_dp_add_integer(pkg, "ExternalFacingPort", 1); + acpi_dp_add_integer(pkg, "UID", port_id); + + acpi_dp_add_package(dsd, pkg); + acpi_dp_write(dsd); + + acpigen_pop_len(); /* Scope */ + + printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev), config->desc, dev_path(dev)); +} +#endif + +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_static_bus, +#if CONFIG(HAVE_ACPI_TABLES) + .acpi_fill_ssdt = usb4_pcie_fill_ssdt, +#endif +}; + +static void pcie_enable(struct device *dev) +{ + dev->ops = &usb4_dev_ops; +} + +struct chip_operations soc_intel_common_block_usb4_ops = { + CHIP_NAME("Intel USB4 Root Port") + .enable_dev = pcie_enable +}; |