diff options
author | Patrick Rudolph <siro@das-labor.org> | 2017-07-05 20:07:06 +0200 |
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committer | Martin Roth <martinroth@google.com> | 2018-04-13 16:55:14 +0000 |
commit | 0b643d24994588480a3ca77ecacbb7ce66402195 (patch) | |
tree | 08754f880a954f7b9e9ce9c935cfc890c526d390 /src/northbridge/intel/sandybridge/pcie.c | |
parent | 70df5d6e43fd839d3fc7bf8fa672c4b540fc0c10 (diff) | |
download | coreboot-0b643d24994588480a3ca77ecacbb7ce66402195.tar.xz |
nb/intel/sandybridge/peg: Add PEG driver stub
Required for other ACPI generators, like the one used for _ROM.
* Add ACPI code for PEG10/PEG11/PEG12/PEG60 and include it on all platforms.
* Add PCIe driver for PEG. The driver returns ACPI names for ssdt generators.
Needs test on real hardware.
Change-Id: I96835c43522580c95fd4f250c56bf9438e993bc1
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/22337
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/northbridge/intel/sandybridge/pcie.c')
-rw-r--r-- | src/northbridge/intel/sandybridge/pcie.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/northbridge/intel/sandybridge/pcie.c b/src/northbridge/intel/sandybridge/pcie.c new file mode 100644 index 0000000000..9cb823e34c --- /dev/null +++ b/src/northbridge/intel/sandybridge/pcie.c @@ -0,0 +1,105 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2017-2018 Patrick Rudolph <siro@das-labor.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; version 2 of + * the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <console/console.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pciexp.h> +#include <device/pci_ids.h> +#include <assert.h> + +static void pcie_disable(struct device *dev) +{ + printk(BIOS_INFO, "%s: Disabling device\n", dev_path(dev)); + dev->enabled = 0; +} + +#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES) +static const char *pcie_acpi_name(const struct device *dev) +{ + assert(dev); + + if (dev->path.type != DEVICE_PATH_PCI) + return NULL; + + assert(dev->bus); + if (dev->bus->secondary == 0) + switch (dev->path.pci.devfn) { + case PCI_DEVFN(1, 0): + return "PEGP"; + case PCI_DEVFN(1, 1): + return "PEG1"; + case PCI_DEVFN(1, 2): + return "PEG2"; + case PCI_DEVFN(6, 0): + return "PEG6"; + }; + + const device_t port = dev->bus->dev; + assert(port); + assert(port->bus); + + if (dev->path.pci.devfn == PCI_DEVFN(0, 0) && + port->bus->secondary == 0 && + (port->path.pci.devfn == PCI_DEVFN(1, 0) || + port->path.pci.devfn == PCI_DEVFN(1, 1) || + port->path.pci.devfn == PCI_DEVFN(1, 2) || + port->path.pci.devfn == PCI_DEVFN(6, 0))) + return "DEV0"; + + return NULL; +} +#endif + +static void +pcie_set_subsystem(struct device *dev, unsigned int ven, unsigned int device) +{ + /* NOTE: This is not the default position! */ + if (!ven || !device) + pci_write_config32(dev, 0x94, + pci_read_config32(dev, 0)); + else + pci_write_config32(dev, 0x94, + ((device & 0xffff) << 16) | (ven & 0xffff)); +} + +static struct pci_operations pci_ops = { + .set_subsystem = pcie_set_subsystem, +}; + +static struct device_operations device_ops = { + .read_resources = pci_bus_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_bus_enable_resources, + .scan_bus = pciexp_scan_bridge, + .reset_bus = pci_bus_reset, + .disable = pcie_disable, + .init = pci_dev_init, + .ops_pci = &pci_ops, +#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES) + .acpi_name = pcie_acpi_name, +#endif +}; + +static const unsigned short pci_device_ids[] = { 0x0101, 0x0105, 0x0109, 0x010d, + 0x0151, 0x0155, 0x0159, 0x015d, + 0 }; + +static const struct pci_driver pch_pcie __pci_driver = { + .ops = &device_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .devices = pci_device_ids, +}; |