+/*
+ * 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 encompase 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)
{
- int res = 0;
-
- printk_spew("%s . Root is %p\n", __FUNCTION__, root);
- /* Initialize the system wide io space constraints */
- root->resource[res].base = 0x400;
- root->resource[res].size = 0;
- root->resource[res].align = 0;
- root->resource[res].gran = 0;
- root->resource[res].limit = 0xffffUL;
- root->resource[res].flags = IORESOURCE_IO;
- root->resource[res].index = 0;
- printk_spew("%s . link %p, resource %p\n", __FUNCTION__,
- &root->link[0], &root->resource[res]);
- compute_allocate_resource(&root->link[0], &root->resource[res],
- IORESOURCE_IO, IORESOURCE_IO);
- res++;
-
- /* Initialize the system wide memory resources constraints */
- root->resource[res].base = 0;
- root->resource[res].size = 0;
- root->resource[res].align = 0;
- root->resource[res].gran = 0;
- root->resource[res].limit = 0xffffffffUL;
- root->resource[res].flags = IORESOURCE_MEM;
- root->resource[res].index = 1;
- printk_spew("%s . link %p, resource %p\n", __FUNCTION__,
- &root->link[0], &root->resource[res]);
- compute_allocate_resource(&root->link[0], &root->resource[res],
- IORESOURCE_MEM, IORESOURCE_MEM);
- res++;
-
- root->resources = res;
- printk_spew("%s DONE\n", __FUNCTION__);
+ 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__);
}
/**
- * Walk through devices on the motherboard and scan for devices behind
- * them.
- * @param root Pointer to the device structure for the system root device
- * @param max Maximum bus number allowed in the system.
+ * 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
+ * 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 the root device and
+ * LPC bridges.
+ *
+ * @param bus Pointer to the device to which the static buses are attached to.
+ * @param max Maximum bus number currently used before scanning.
* @return Largest bus number used.
*/
-unsigned int walk_static_devices(device_t bus, unsigned int max)
+static int smbus_max = 0;
+unsigned int scan_static_bus(device_t bus, unsigned int max)
{
device_t child;
- unsigned link;
- for(link = 0; link < bus->links; link++) {
- for(child = bus->link[link].children; child; child = child->sibling) {
+ 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(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);
}
- printk_debug("%s %s\n",
+ if (child->path.type == DEVICE_PATH_I2C) {
+ printk(BIOS_DEBUG, "smbus: %s[%d]->",
+ dev_path(child->bus->dev), child->bus->link_num );
+ }
+ printk(BIOS_DEBUG, "%s %s\n",
dev_path(child),
- child->enable?"enabled": "disabled");
+ 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(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus));
+
return max;
}
-void enable_childrens_resources(device_t dev)
+static void root_dev_enable_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);
- }
- }
}
-unsigned int root_dev_scan_pci_bus(device_t root, unsigned int max)
+/**
+ * Scan root bus for generic systems.
+ *
+ * This function is the default scan_bus() method of the root device.
+ *
+ * @param root The root device structure.
+ * @param max The current bus number scanned so far, usually 0x00.
+ * @return TODO.
+ */
+static unsigned int root_dev_scan_bus(device_t root, unsigned int max)
{
- return pci_scan_bus(&root->link[0], 0, 0xff, max);
+ return scan_static_bus(root, max);
}
-struct device_operations default_dev_ops_root = {
- .read_resources = root_dev_read_resources,
- .set_resources = root_dev_set_resources,
- .enable_resources = enable_childrens_resources,
- .init = 0,
- .scan_bus = root_dev_scan_pci_bus,
-};
+static void root_dev_init(device_t root)
+{
+}
+
+static void root_dev_reset(struct bus *bus)
+{
+ printk(BIOS_INFO, "Reseting board...\n");
+ hard_reset();
+}
/**
- * This is the root of the device tree. A PCI tree always has
- * one bus, bus 0. Bus 0 contains devices and bridges.
+ * Default device operation for root device.
+ *
+ * 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 dev_root = {
- .ops = &default_dev_ops_root,
- .bus = &dev_root.link[0],
- .path = { .type = DEVICE_PATH_ROOT },
- .enable = 1,
- .links = 1,
- .link = {
- [0] = {
- .dev = &dev_root,
- .link = 0,
- },
- },
+struct device_operations default_dev_ops_root = {
+ .read_resources = root_dev_read_resources,
+ .set_resources = root_dev_set_resources,
+ .enable_resources = root_dev_enable_resources,
+ .init = root_dev_init,
+ .scan_bus = root_dev_scan_bus,
+ .reset_bus = root_dev_reset,
};
projects / coreboot.git / blobdiff