+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2003-2004 Linux Networx
+ * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
+ * Copyright (C) 2003 Ronald G. Minnich <rminnich@gmail.com>
+ * Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov>
+ * Copyright (C) 2005 Tyan
+ * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
+ *
+ * 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 <reset.h>
-/**
- * Read the resources for the root device,
- * that encompass the resources for the entire system.
- * @param root Pointer to the device structure for the system root device
+/**
+ * Read the resources for the root device, that encompass the resources for
+ * the entire system.
+ *
+ * @param root Pointer to the device structure for the system root device.
*/
-void root_dev_read_resources(device_t root)
+static void root_dev_read_resources(device_t root)
{
- struct resource *resource;
-
- /* Initialize the system wide io space constraints */
- resource = new_resource(root, 0);
- resource->base = 0x400;
- resource->size = 0;
- resource->align = 0;
- resource->gran = 0;
- resource->limit = 0xffffUL;
- resource->flags = IORESOURCE_IO;
- compute_allocate_resource(&root->link[0], resource,
- IORESOURCE_IO, IORESOURCE_IO);
-
- /* Initialize the system wide memory resources constraints */
- resource = new_resource(root, 1);
- resource->base = 0;
- resource->size = 0;
- resource->align = 0;
- resource->gran = 0;
- resource->limit = 0xffffffffUL;
- resource->flags = IORESOURCE_MEM;
- compute_allocate_resource(&root->link[0], resource,
- IORESOURCE_MEM, IORESOURCE_MEM);
+ printk(BIOS_ERR, "%s should never be called.\n", __func__);
}
/**
- * Write the resources for the root device,
- * and every device under it which are all of the devices.
- * @param root Pointer to the device structure for the system root device
+ * Write the resources for every device.
+ *
+ * Write the resources for the root device, and every device under it which
+ * are all of the devices.
+ *
+ * @param root Pointer to the device structure for the system root device.
*/
-void root_dev_set_resources(device_t root)
+static void root_dev_set_resources(device_t root)
{
- struct bus *bus;
-
- bus = &root->link[0];
- compute_allocate_resource(bus,
- &root->resource[0], IORESOURCE_IO, IORESOURCE_IO);
- compute_allocate_resource(bus,
- &root->resource[1], IORESOURCE_MEM, IORESOURCE_MEM);
- assign_resources(bus);
+ printk(BIOS_ERR, "%s should never be called.\n", __func__);
}
/**
- * @brief Scan devices on static buses.
+ * Scan devices on static buses.
*
* The enumeration of certain buses is purely static. The existence of
* devices on those buses can be completely determined at compile time
- * by the config file. Typical expamles are the 'PNP' devices on a legacy
- * ISA/LPC bus. There is no need of probing of any kind, the only thing
- * we have to do is to walk through the bus and enable or disable devices
- * as indicated in the config file.
+ * and is specified in the config file. Typical examples are the 'PNP'
+ * devices on a legacy ISA/LPC bus. There is no need of probing of any kind,
+ * the only thing we have to do is to walk through the bus and
+ * enable or disable devices as indicated in the config file.
+ *
+ * On the other hand, some devices are virtual and their existence is
+ * artificial. They can not be probed at run time. One example is the
+ * debug device. Those virtual devices have to be listed in the config
+ * file under some static bus in order to be enumerated at run time.
*
- * This function is the default scan_bus() method for LPC bridges.
+ * This function is the default scan_bus() method for the root device and
+ * LPC bridges.
*
- * @param root Pointer to the device structure for the system root device
- * @param max Maximum bus number allowed in the system.
- * @return Largest bus number used.
+ * @param bus Pointer to the device to which the static buses are attached to.
+ * @param max Maximum bus number currently used before scanning.
+ * @return The largest bus number used.
*/
+static int smbus_max = 0;
unsigned int scan_static_bus(device_t bus, unsigned int max)
{
device_t child;
- unsigned link;
-
- printk_debug("%s for %s\n", __func__, dev_path(bus));
+ struct bus *link;
+
+ printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus));
+
+ for (link = bus->link_list; link; link = link->next) {
+ /* For SMBus bus enumerate. */
+ child = link->children;
+
+ if (child && child->path.type == DEVICE_PATH_I2C)
+ link->secondary = ++smbus_max;
- for(link = 0; link < bus->links; link++) {
- for(child = bus->link[link].children; child; child = child->sibling) {
- if (child->ops && child->ops->enable) {
+ for (child = link->children; child; child = child->sibling) {
+ if (child->chip_ops && child->chip_ops->enable_dev)
+ child->chip_ops->enable_dev(child);
+
+ if (child->ops && child->ops->enable)
child->ops->enable(child);
+
+ if (child->path.type == DEVICE_PATH_I2C) {
+ printk(BIOS_DEBUG, "smbus: %s[%d]->",
+ dev_path(child->bus->dev),
+ child->bus->link_num);
}
- printk_debug("%s %s\n",
- dev_path(child),
- child->enabled?"enabled": "disabled");
+ printk(BIOS_DEBUG, "%s %s\n", dev_path(child),
+ child->enabled ? "enabled" : "disabled");
}
}
- for(link = 0; link < bus->links; link++) {
- for(child = bus->link[link].children; child; child = child->sibling) {
+
+ for (link = bus->link_list; link; link = link->next) {
+ for (child = link->children; child; child = child->sibling) {
if (!child->ops || !child->ops->scan_bus)
continue;
- printk_debug("%s scanning...\n", dev_path(child));
- max = child->ops->scan_bus(child, max);
+ printk(BIOS_SPEW, "%s scanning...\n", dev_path(child));
+ max = scan_bus(child, max);
}
}
- printk_debug("%s done\n", __func__);
+ printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus));
return max;
}
-/**
- * @brief Enable resources for children devices
- *
- * @param dev the device whos children's resources are to be enabled
- *
- * This function is call by the enable_resource() indirectly via the
- * enable_resources() method of devices.
- *
- * Indirect mutual recursion:
- */
-void enable_childrens_resources(device_t dev)
-{
- unsigned link;
- for(link = 0; link < dev->links; link++) {
- device_t child;
- for(child = dev->link[link].children; child; child = child->sibling) {
- enable_resources(child);
- }
- }
-}
-
-void root_dev_enable_resources(device_t dev)
+static void root_dev_enable_resources(device_t dev)
{
- enable_childrens_resources(dev);
}
/**
- * @brief Scan root bus for generic systems
+ * Scan root bus for generic systems.
*
- * @param root The root device structure
- * @param max The current bus number scanned so fat, usually 0x00
+ * This function is the default scan_bus() method of the root device.
*
- * This function is the default scan_bus() method of the dynamic root device.
- * The bus heirachy is rooted at the host/northbridge. The northbridge of a
- * generic PCI bus system is at Bus 0, Dev 0, Fun 0 so we scan the whole PCI
- * buses from there.
+ * @param root The root device structure.
+ * @param max The current bus number scanned so far, usually 0x00.
+ * @return The largest bus number used.
*/
-unsigned int root_dev_scan_bus(device_t root, unsigned int max)
+static unsigned int root_dev_scan_bus(device_t root, unsigned int max)
{
return scan_static_bus(root, max);
}
-void root_dev_init(device_t root)
+static void root_dev_init(device_t root)
{
- initialize_cpus(root);
+}
+
+static void root_dev_reset(struct bus *bus)
+{
+ printk(BIOS_INFO, "Resetting board...\n");
+ hard_reset();
}
/**
- * @brief Default device operation for root device
+ * Default device operation for root device.
*
- * This is the default device operation for root devices in PCI based systems.
- * The static enumeration code chip_control::enumerate() of mainboards usually
- * override this operation with their own device operations. An notable
- * example is mainboard operations for AMD K8 mainboards. They replace the
- * scan_bus() method with amdk8_scan_root_bus() due to the special device
- * layout of AMD K8 systems.
+ * This is the default device operation for root devices. These operations
+ * should be fully usable as is. However the chip_operations::enable_dev()
+ * of a motherboard can override this if you want non-default behavior.
*/
struct device_operations default_dev_ops_root = {
.read_resources = root_dev_read_resources,
.enable_resources = root_dev_enable_resources,
.init = root_dev_init,
.scan_bus = root_dev_scan_bus,
-};
-
-/**
- * @brief The root of dynamic device tree.
- *
- * This is the root of the dynamic device tree. A PCI tree always has
- * one bus, bus 0. Bus 0 contains devices and bridges.
- */
-struct device dev_root = {
- .ops = &default_dev_ops_root,
- .bus = &dev_root.link[0],
- .path = { .type = DEVICE_PATH_ROOT },
- .enabled = 1,
+ .reset_bus = root_dev_reset,
};
projects / coreboot.git / blobdiff