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authorChris Morgan <macromorgan@hotmail.com>2020-02-07 09:40:42 -0600
committerPatrick Georgi <pgeorgi@google.com>2020-03-06 07:54:26 +0000
commit5e5e789f9b115f7fb1e7c453cdf20df088ac893d (patch)
tree0b4a2bd0c1658ed770485947b468073450345ae0 /src
parentefc4be6bf1b132f8d280b7b840049ea6677405d3 (diff)
downloadcoreboot-5e5e789f9b115f7fb1e7c453cdf20df088ac893d.tar.xz
nb/intel/haswell/peg: Add PEG driver stub
This is a port of https://review.coreboot.org/c/coreboot/+/22337 to the Haswell northbridge. This code is necessary to support the dGPU of the t440p. Code was cut and pasted from Sandy Bridge with vendor IDs updated to the correct Haswell values. Tested on t440p with dGPU on Ubuntu 18.04.4 with 5.3.0-28 kernel. Without patches dmesg reports Nouveau is unable to read the VBIOS of the dGPU as it has an invalid checksum (I checked that the ROM in CBFS is correct). With this patch DRM works correctly with both the Nouveau driver and the Nvidia proprietary driver. Windows 10 1909 also tested but generates bluescreen once GPU driver is loaded. Change-Id: Ie5f089fb6fd774e6c61f4f9281e2945bd44edf27 Signed-off-by: Chris Morgan <macromorgan@hotmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/38743 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Diffstat (limited to 'src')
-rw-r--r--src/northbridge/intel/haswell/Makefile.inc1
-rw-r--r--src/northbridge/intel/haswell/acpi/haswell.asl1
-rw-r--r--src/northbridge/intel/haswell/acpi/hostbridge.asl3
-rw-r--r--src/northbridge/intel/haswell/acpi/peg.asl60
-rw-r--r--src/northbridge/intel/haswell/pcie.c88
5 files changed, 152 insertions, 1 deletions
diff --git a/src/northbridge/intel/haswell/Makefile.inc b/src/northbridge/intel/haswell/Makefile.inc
index b9863367c9..73a20f2dfb 100644
--- a/src/northbridge/intel/haswell/Makefile.inc
+++ b/src/northbridge/intel/haswell/Makefile.inc
@@ -19,6 +19,7 @@ bootblock-y += bootblock.c
ramstage-y += memmap.c
ramstage-y += northbridge.c
+ramstage-y += pcie.c
ramstage-y += gma.c
ramstage-y += acpi.c
diff --git a/src/northbridge/intel/haswell/acpi/haswell.asl b/src/northbridge/intel/haswell/acpi/haswell.asl
index 45ebff29f1..2db72d7842 100644
--- a/src/northbridge/intel/haswell/acpi/haswell.asl
+++ b/src/northbridge/intel/haswell/acpi/haswell.asl
@@ -16,6 +16,7 @@
#include "../haswell.h"
#include "hostbridge.asl"
+#include "peg.asl"
#include <southbridge/intel/common/rcba.h>
/* PCI Device Resource Consumption */
diff --git a/src/northbridge/intel/haswell/acpi/hostbridge.asl b/src/northbridge/intel/haswell/acpi/hostbridge.asl
index 19d788ce26..d567701cb7 100644
--- a/src/northbridge/intel/haswell/acpi/hostbridge.asl
+++ b/src/northbridge/intel/haswell/acpi/hostbridge.asl
@@ -36,7 +36,8 @@ Device (MCHC)
MHEN, 1, // Enable
, 13, //
MHBR, 22, // MCHBAR
-
+ Offset (0x54),
+ DVEN, 32,
Offset (0x60), // PCIe BAR
PXEN, 1, // Enable
PXSZ, 2, // BAR size
diff --git a/src/northbridge/intel/haswell/acpi/peg.asl b/src/northbridge/intel/haswell/acpi/peg.asl
new file mode 100644
index 0000000000..c4af375422
--- /dev/null
+++ b/src/northbridge/intel/haswell/acpi/peg.asl
@@ -0,0 +1,60 @@
+/*
+ * 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.
+ */
+
+Device (PEGP)
+{
+ Name (_ADR, 0x00010000)
+
+ Method (_STA)
+ {
+ Return (((\_SB.PCI0.MCHC.DVEN >> 3) & 1) * 0xf)
+ }
+
+ Device (DEV0)
+ {
+ Name(_ADR, 0x00000000)
+ }
+}
+
+Device (PEG1)
+{
+ Name (_ADR, 0x00010001)
+
+ Method (_STA)
+ {
+ Return (((\_SB.PCI0.MCHC.DVEN >> 2) & 1) * 0xf)
+ }
+
+ Device (DEV0)
+ {
+ Name(_ADR, 0x00000000)
+ }
+}
+
+Device (PEG2)
+{
+ Name (_ADR, 0x00010002)
+
+ Method (_STA)
+ {
+ Return (((\_SB.PCI0.MCHC.DVEN >> 1) & 1) * 0xf)
+ }
+
+ Device (DEV0)
+ {
+ Name(_ADR, 0x00000000)
+ }
+}
diff --git a/src/northbridge/intel/haswell/pcie.c b/src/northbridge/intel/haswell/pcie.c
new file mode 100644
index 0000000000..b3a21bfc3e
--- /dev/null
+++ b/src/northbridge/intel/haswell/pcie.c
@@ -0,0 +1,88 @@
+/*
+ * 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 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";
+ };
+
+ struct device *const 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)))
+ return "DEV0";
+
+ return NULL;
+}
+#endif
+
+static struct pci_operations pci_ops = {
+ .set_subsystem = pci_dev_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 CONFIG(HAVE_ACPI_TABLES)
+ .acpi_name = pcie_acpi_name,
+#endif
+};
+
+static const unsigned short pci_device_ids[] = { 0x0c01, 0x0c05, 0x0c09, 0x0c0d, 0 };
+
+static const struct pci_driver pch_pcie __pci_driver = {
+ .ops = &device_ops,
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .devices = pci_device_ids,
+};