intel/i82801ix: new southbridge, ICH9

Add support for ICH9 southbridge

Change-Id: I70612431101bf48d9dcc96ee1b37d257c9ad2ee2
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1690
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

1 files changed, 134 insertions, 0 deletions

diff --git a/src/southbridge/intel/i82801ix/pcie.c b/src/southbridge/intel/i82801ix/pcie.c
new file mode 100644
index 0000000000..fcf6668f59
--- /dev/null
+++ b/src/southbridge/intel/i82801ix/pcie.c
@@ -0,0 +1,134 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008-2009 coresystems GmbH
+ *               2012 secunet Security Networks AG
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pciexp.h>
+#include <device/pci_ids.h>
+
+static void pci_init(struct device *dev)
+{
+	u16 reg16;
+	u32 reg32;
+
+	printk(BIOS_DEBUG, "Initializing ICH9 PCIe root port.\n");
+
+	/* Enable Bus Master */
+	reg32 = pci_read_config32(dev, PCI_COMMAND);
+	reg32 |= PCI_COMMAND_MASTER;
+	pci_write_config32(dev, PCI_COMMAND, reg32);
+
+	/* Set Cache Line Size to 0x10 */
+	// This has no effect but the OS might expect it
+	pci_write_config8(dev, 0x0c, 0x10);
+
+	reg16 = pci_read_config16(dev, 0x3e);
+	reg16 &= ~(1 << 0); /* disable parity error response */
+	reg16 |= (1 << 2); /* ISA enable */
+	pci_write_config16(dev, 0x3e, reg16);
+
+	/* Enable IO xAPIC on this PCIe port */
+	reg32 = pci_read_config32(dev, 0xd8);
+	reg32 |= (1 << 7);
+	pci_write_config32(dev, 0xd8, reg32);
+
+	/* Enable Backbone Clock Gating */
+	reg32 = pci_read_config32(dev, 0xe1);
+	reg32 |= (1 << 3) | (1 << 2) | (1 << 1) | (1 << 0);
+	pci_write_config32(dev, 0xe1, reg32);
+
+#if CONFIG_MMCONF_SUPPORT
+	/* Set VC0 transaction class */
+	reg32 = pci_mmio_read_config32(dev, 0x114);
+	reg32 &= 0xffffff00;
+	reg32 |= 1;
+	pci_mmio_write_config32(dev, 0x114, reg32);
+
+	/* Mask completion timeouts */
+	reg32 = pci_mmio_read_config32(dev, 0x148);
+	reg32 |= (1 << 14);
+	pci_mmio_write_config32(dev, 0x148, reg32);
+
+	/* Lock R/WO Correctable Error Mask. */
+	pci_mmio_write_config32(dev, 0x154, pci_mmio_read_config32(dev, 0x154));
+#else
+#error "MMIO needed for ICH9 PCIe"
+#endif
+
+	/* Clear errors in status registers */
+	reg16 = pci_read_config16(dev, 0x06);
+	pci_write_config16(dev, 0x06, reg16);
+	reg16 = pci_read_config16(dev, 0x1e);
+	pci_write_config16(dev, 0x1e, reg16);
+
+	/* Get configured ASPM state */
+	const enum aspm_type apmc = pci_read_config32(dev, 0x50) & 3;
+
+	/* If both L0s and L1 enabled then set root port 0xE8[1]=1 */
+	if (apmc == PCIE_ASPM_BOTH) {
+		reg32 = pci_read_config32(dev, 0xe8);
+		reg32 |= (1 << 1);
+		pci_write_config32(dev, 0xe8, reg32);
+	}
+}
+
+static void pcie_set_subsystem(device_t dev, unsigned vendor, unsigned device)
+{
+	/* NOTE: 0x94 is not the default position! */
+	if (!vendor || !device) {
+		pci_write_config32(dev, 0x94,
+				pci_read_config32(dev, 0));
+	} else {
+		pci_write_config32(dev, 0x94,
+				((device & 0xffff) << 16) | (vendor & 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,
+	.init			= pci_init,
+	.scan_bus		= pciexp_scan_bridge,
+	.ops_pci		= &pci_ops,
+};
+
+/* 82801Ix (ICH9DH/ICH9DO/ICH9R/ICH9/ICH9M-E/ICH9M) */
+static const unsigned short pci_device_ids[] = {
+	0x2940, /* Port 1 */
+	0x2942, /* Port 2 */
+	0x2944, /* Port 3 */
+	0x2946, /* Port 4 */
+	0x2948, /* Port 5 */
+	0x294a, /* Port 6 */
+	0
+};
+static const struct pci_driver ich9_pcie __pci_driver = {
+	.ops		= &device_ops,
+	.vendor		= PCI_VENDOR_ID_INTEL,
+	.devices	= pci_device_ids,
+};
+