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authorLi-Ta Lo <ollie@lanl.gov>2004-05-07 21:52:47 +0000
committerLi-Ta Lo <ollie@lanl.gov>2004-05-07 21:52:47 +0000
commitfb4c50f6950ac76dad88cc8c7ec8511321be0db0 (patch)
tree8ffbf7c4a81b675f363ef732085fb5af00597e04 /src/devices
parent3bb314725aee90ae9436ce3b1d7e9e29f8e2d473 (diff)
code reformat, doxidization
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1549 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/devices')
-rw-r--r--src/devices/device_util.c2
-rw-r--r--src/devices/root_device.c35
2 files changed, 28 insertions, 9 deletions
diff --git a/src/devices/device_util.c b/src/devices/device_util.c
index 29bb539e1d..93a8a5cd96 100644
--- a/src/devices/device_util.c
+++ b/src/devices/device_util.c
@@ -184,7 +184,7 @@ struct resource *get_resource(device_t dev, unsigned index)
/* See if there is a resource with the appropriate index */
resource = 0;
- for(i = 0; i < dev->resources; i++) {
+ for (i = 0; i < dev->resources; i++) {
if (dev->resource[i].index == index) {
resource = &dev->resource[i];
break;
diff --git a/src/devices/root_device.c b/src/devices/root_device.c
index 78a81608ad..301db1889d 100644
--- a/src/devices/root_device.c
+++ b/src/devices/root_device.c
@@ -61,17 +61,27 @@ void root_dev_set_resources(device_t root)
}
/**
- * Walk through devices on the motherboard and scan for devices behind
- * them.
+ * @brief Scan devices on static buses.
+ *
+ * The existence of devices on certain buses can be completely determined at
+ * compile time by the config file. Typical expamles are the 'PNP' devices
+ * on an 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.
+ *
* @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.
*/
-unsigned int walk_static_devices(device_t bus, unsigned int max)
+unsigned int scan_static_bus(device_t bus, unsigned int max)
{
device_t child;
unsigned link;
+ printk_debug("%s entered\n", __FUNCTION__);
+
for (link = 0; link < bus->links; link++) {
for (child = bus->link[link].children; child; child = child->sibling) {
if (child->ops && child->ops->enable) {
@@ -89,15 +99,18 @@ unsigned int walk_static_devices(device_t bus, unsigned int max)
max = child->ops->scan_bus(child, max);
}
}
+
+ printk_debug("%s done\n", __FUNCTION__);
+
return max;
}
/**
* @brief Enable resources for children devices
*
- * @param dev the device whos childrens resources are to be enabled
+ * @param dev the device whos children's resources are to be enabled
*
- * This function is call by the enable_resource
+ * This function is call by the enable_resource()
*/
void enable_childrens_resources(device_t dev)
{
@@ -113,9 +126,13 @@ void enable_childrens_resources(device_t dev)
/**
* @brief Scan root bus for generic PCI systems
*
- * @param root the root device structure
- * @param max the current bus number scanned so fat, usually 0x00
+ * @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 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.
*/
unsigned int root_dev_scan_pci_bus(device_t root, unsigned int max)
{
@@ -141,7 +158,9 @@ struct device_operations default_dev_ops_root = {
};
/**
- * This is the root of the device tree. A PCI tree always has
+ * @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 = {