1 files changed, 54 insertions, 0 deletions
diff --git a/src/devices/agp_device.c b/src/devices/agp_device.c
new file mode 100644
index 0000000000..27ae36eefd
--- /dev/null
+++ b/src/devices/agp_device.c
@@ -0,0 +1,54 @@
+/* (c) 2005 Linux Networx GPL see COPYING for details */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/agp.h>
+
+static void agp_tune_dev(device_t dev)
+{
+	unsigned cap;
+	cap = pci_find_capability(dev, PCI_CAP_ID_AGP);
+	if (!cap) {
+		return;
+	}
+	/* The OS is responsible for AGP tuning so do nothing here */
+}
+
+unsigned int agp_scan_bus(struct bus *bus,
+	unsigned min_devfn, unsigned max_devfn, unsigned int max)
+{
+	device_t child;
+	max = pci_scan_bus(bus, min_devfn, max_devfn, max);
+	for(child = bus->children; child; child = child->sibling) {
+		if (	(child->path.u.pci.devfn < min_devfn) ||
+			(child->path.u.pci.devfn > max_devfn))
+		{
+			continue;
+		}
+		agp_tune_dev(child);
+	}
+	return max;
+}
+
+unsigned int agp_scan_bridge(device_t dev, unsigned int max)
+{
+	return do_pci_scan_bridge(dev, max, agp_scan_bus);
+}
+
+/** Default device operations for AGP bridges */
+static struct pci_operations agp_bus_ops_pci = {
+	.set_subsystem = 0,
+};
+
+struct device_operations default_agp_ops_bus = {
+	.read_resources   = pci_bus_read_resources,
+	.set_resources    = pci_dev_set_resources,
+	.enable_resources = pci_bus_enable_resources,
+	.init		  = 0,
+	.scan_bus	  = agp_scan_bridge,
+	.enable           = 0,
+	.reset_bus        = pci_bus_reset,
+	.ops_pci          = &agp_bus_ops_pci,
+};