Support for the Intel ICH7 southbridge.

This includes an early SMI handler.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3701 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 141 insertions, 0 deletions

diff --git a/src/southbridge/intel/i82801gx/i82801gx_pci.c b/src/southbridge/intel/i82801gx/i82801gx_pci.c
new file mode 100644
index 0000000..cf7cad6
--- /dev/null
+++ b/src/southbridge/intel/i82801gx/i82801gx_pci.c
@@ -0,0 +1,141 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008 coresystems GmbH
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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/pci_ids.h>
+
+static void pci_init(struct device *dev)
+{
+	u16 reg16;
+
+#if 0
+	/* Commented out for now because it will break on some machines. */
+	/* Set latency timer to 32. */
+	pci_write_config16(dev, 0x1b, 0x20);
+#endif
+
+	/* disable parity error response */
+	reg16 = pci_read_config16(dev, 0x3e);
+	reg16 &= ~(1 << 0);
+	pci_write_config16(dev, 0x3e, reg16);
+
+	/* Clear errors in status registers */
+	reg16 = pci_read_config16(dev, 0x06);
+	reg16 |= 0xf900;
+	pci_write_config16(dev, 0x06, reg16);
+
+	reg16 = pci_read_config16(dev, 0x1e);
+	reg16 |= 0xf900;
+	pci_write_config16(dev, 0x1e, reg16);
+}
+
+static void ich_pci_dev_enable_resources(struct device *dev)
+{
+	const struct pci_operations *ops;
+	uint16_t command;
+
+	/* Set the subsystem vendor and device id for mainboard devices */
+	ops = ops_pci(dev);
+	if (dev->on_mainboard && ops && ops->set_subsystem) {
+		printk_debug("%s subsystem <- %02x/%02x\n",
+			dev_path(dev), 
+			MAINBOARD_PCI_SUBSYSTEM_VENDOR_ID,
+			MAINBOARD_PCI_SUBSYSTEM_DEVICE_ID);
+		ops->set_subsystem(dev, 
+			MAINBOARD_PCI_SUBSYSTEM_VENDOR_ID,
+			MAINBOARD_PCI_SUBSYSTEM_DEVICE_ID);
+	}
+
+#if 0
+	/* If we write to PCI_COMMAND, on some systems 
+	 * this will cause the ROM and APICs not being visible
+	 * anymore.
+	 */
+	command = pci_read_config16(dev, PCI_COMMAND);
+	command |= dev->command;
+	printk_debug("%s cmd <- %02x\n", dev_path(dev), command);
+	pci_write_config16(dev, PCI_COMMAND, command);
+#endif
+}
+
+static void ich_pci_bus_enable_resources(struct device *dev)
+{
+	uint16_t ctrl;
+	/* enable IO in command register if there is VGA card
+	 * connected with (even it does not claim IO resource)
+	 */
+	if (dev->link[0].bridge_ctrl & PCI_BRIDGE_CTL_VGA)
+		dev->command |= PCI_COMMAND_IO;
+	ctrl = pci_read_config16(dev, PCI_BRIDGE_CONTROL);
+	ctrl |= dev->link[0].bridge_ctrl;
+	ctrl |= (PCI_BRIDGE_CTL_PARITY + PCI_BRIDGE_CTL_SERR); /* error check */
+	printk_debug("%s bridge ctrl <- %04x\n", dev_path(dev), ctrl);
+	pci_write_config16(dev, PCI_BRIDGE_CONTROL, ctrl);
+
+	/* This is the reason we need our own pci_bus_enable_resources */
+	ich_pci_dev_enable_resources(dev);
+
+	enable_childrens_resources(dev);
+}
+
+static void set_subsystem(device_t dev, unsigned vendor, unsigned device)
+{
+#if 0
+	/* Currently disabled because it causes a "BAR 9" memory resource
+	 * conflict:
+	 */
+	u32 pci_id;
+
+	printk_debug("Setting PCI bridge subsystem ID\n");
+	pci_id = pci_read_config32(dev, 0);
+	pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, pci_id );
+#endif
+}
+
+static struct pci_operations pci_ops = {
+	.set_subsystem = set_subsystem,
+};
+
+static struct device_operations device_ops = {
+	.read_resources		= pci_bus_read_resources,
+	.set_resources		= pci_dev_set_resources,
+	.enable_resources	= ich_pci_bus_enable_resources,
+	.init			= pci_init,
+	.scan_bus		= pci_scan_bridge,
+	.ops_pci		= &pci_ops,
+};
+
+
+/* Desktop */
+static const struct pci_driver i82801g_pci __pci_driver = {
+	.ops	= &device_ops,
+	.vendor	= 0x8086,
+	.device	= 0x244e,
+};
+
+/* Mobile / Ultra Mobile */
+static const struct pci_driver i82801gmu_pci __pci_driver = {
+	.ops	= &device_ops,
+	.vendor	= 0x8086,
+	.device	= 0x2448,
+};
+