+/*
+ * 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,
*/
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_err("%s should never be called.\n", __func__);
}
/**
+ * @brief 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)
{
- 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_err("%s should never be called.\n", __func__);
}
/**
*
* 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.
*
- * This function is the default scan_bus() method for LPC bridges.
+ * 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.
*
- * @param root Pointer to the device structure for the system root device
- * @param max Maximum bus number allowed in the system.
+ * This function is the default scan_bus() method for the root device and
+ * LPC bridges.
+ *
+ * @param bus Pointer to the device structure which the static buses are attached
+ * @param max Maximum bus number currently used before scanning.
* @return 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_spew("%s for %s\n", __func__, dev_path(bus));
for(link = 0; link < bus->links; link++) {
+ /* for smbus bus enumerate */
+ child = bus->link[link].children;
+ if(child && child->path.type == DEVICE_PATH_I2C) {
+ bus->link[link].secondary = ++smbus_max;
+ }
for(child = bus->link[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_debug("smbus: %s[%d]->",
+ dev_path(child->bus->dev), child->bus->link );
+ }
printk_debug("%s %s\n",
dev_path(child),
child->enabled?"enabled": "disabled");
if (!child->ops || !child->ops->scan_bus)
continue;
printk_spew("%s scanning...\n", dev_path(child));
- max = child->ops->scan_bus(child, max);
+ max = scan_bus(child, max);
}
}
- printk_spew("%s done\n", __func__);
+ printk_spew("%s for %s done\n", __func__, dev_path(bus));
return max;
}
*
* @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.
+ * This function is called by the global enable_resource() indirectly via the
+ * device_operation::enable_resources() method of devices.
*
* Indirect mutual recursion:
+ * enable_childrens_resources() -> enable_resources()
+ * enable_resources() -> device_operation::enable_resources()
+ * device_operation::enable_resources() -> enable_children_resources()
*/
void enable_childrens_resources(device_t dev)
{
* @brief Scan root bus for generic systems
*
* @param root The root device structure
- * @param max The current bus number scanned so fat, usually 0x00
+ * @param max The current bus number scanned so far, usually 0x00
*
- * 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.
+ * This function is the default scan_bus() method of the root device.
*/
unsigned int root_dev_scan_bus(device_t root, unsigned int max)
{
{
}
+void root_dev_reset(struct bus *bus)
+{
+ printk_info("Reseting board...\n");
+ hard_reset();
+}
+
/**
* @brief Default device operation for root device
*
- * This is the default device operation for root devices in PCI based systems.
- * These operations should be fully usable as is. However the
- * chip_operations::dev_enable of a motherboard can override this if you
- * want non-default behavior. Currently src/mainboard/arima/hdama/mainbaord.c
- * does this for debugging purposes.
+ * 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,
+ .reset_bus = root_dev_reset,
};
-
-/**
- * @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.
- */
-extern struct device dev_root;
projects / coreboot.git / blobdiff