From cff479e930c20d56312c8f041d1e4f3318293b03 Mon Sep 17 00:00:00 2001 From: Furquan Shaikh Date: Wed, 8 Jul 2020 15:47:19 -0700 Subject: soc/amd/picasso: Add driver for handling PCIE GPP bridges This change adds a driver pcie_gpp.c which provides device_operations for external and internal PCIe GPP bridges. These device operations include standard PCI bridge operations as well as operations for generating ACPI node for the device and returning appropriate ACPI name for it. Signed-off-by: Furquan Shaikh Change-Id: I9f8809c2735bdc09435deda91a570c89e71e8062 Reviewed-on: https://review.coreboot.org/c/coreboot/+/43312 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/soc/amd/picasso/pcie_gpp.c | 60 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 src/soc/amd/picasso/pcie_gpp.c (limited to 'src/soc/amd/picasso/pcie_gpp.c') diff --git a/src/soc/amd/picasso/pcie_gpp.c b/src/soc/amd/picasso/pcie_gpp.c new file mode 100644 index 0000000000..73de80365d --- /dev/null +++ b/src/soc/amd/picasso/pcie_gpp.c @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include +#include +#include +#include +#include +#include + +static const char *pcie_gpp_acpi_name(const struct device *dev) +{ + if (dev->path.type != DEVICE_PATH_PCI) + return NULL; + + switch (dev->path.pci.devfn) { + case PCIE_GPP_0_DEVFN: + return "PBR0"; + case PCIE_GPP_1_DEVFN: + return "PBR1"; + case PCIE_GPP_2_DEVFN: + return "PBR2"; + case PCIE_GPP_3_DEVFN: + return "PBR3"; + case PCIE_GPP_4_DEVFN: + return "PBR4"; + case PCIE_GPP_5_DEVFN: + return "PBR5"; + case PCIE_GPP_6_DEVFN: + return "PBR6"; + case PCIE_GPP_A_DEVFN: + return "PBRA"; + case PCIE_GPP_B_DEVFN: + return "PBRB"; + } + + return NULL; +} + +static struct device_operations pcie_gpp_ops = { + .read_resources = pci_bus_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_bus_enable_resources, + .scan_bus = pci_scan_bridge, + .reset_bus = pci_bus_reset, + .acpi_name = pcie_gpp_acpi_name, + .acpi_fill_ssdt = acpi_device_write_pci_dev, +}; + +static const unsigned short pci_device_ids[] = { + PCI_DEVICE_ID_AMD_FAM17H_PCIE_GPP, + PCI_DEVICE_ID_AMD_FAM17H_PCIE_GPP_BUSA, + PCI_DEVICE_ID_AMD_FAM17H_PCIE_GPP_BUSB, + 0 +}; + +static const struct pci_driver pcie_gpp_driver __pci_driver = { + .ops = &pcie_gpp_ops, + .vendor = PCI_VENDOR_ID_AMD, + .devices = pci_device_ids, +}; -- cgit v1.2.3