Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
Linus Torvalds
@@ -0,0 +1,397 @@
|
||||
/*
|
||||
* sys.c - pseudo-bus for system 'devices' (cpus, PICs, timers, etc)
|
||||
*
|
||||
* Copyright (c) 2002-3 Patrick Mochel
|
||||
* 2002-3 Open Source Development Lab
|
||||
*
|
||||
* This file is released under the GPLv2
|
||||
*
|
||||
* This exports a 'system' bus type.
|
||||
* By default, a 'sys' bus gets added to the root of the system. There will
|
||||
* always be core system devices. Devices can use sysdev_register() to
|
||||
* add themselves as children of the system bus.
|
||||
*/
|
||||
|
||||
#include <linux/config.h>
|
||||
#include <linux/sysdev.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/string.h>
|
||||
|
||||
|
||||
extern struct subsystem devices_subsys;
|
||||
|
||||
#define to_sysdev(k) container_of(k, struct sys_device, kobj)
|
||||
#define to_sysdev_attr(a) container_of(a, struct sysdev_attribute, attr)
|
||||
|
||||
|
||||
static ssize_t
|
||||
sysdev_show(struct kobject * kobj, struct attribute * attr, char * buffer)
|
||||
{
|
||||
struct sys_device * sysdev = to_sysdev(kobj);
|
||||
struct sysdev_attribute * sysdev_attr = to_sysdev_attr(attr);
|
||||
|
||||
if (sysdev_attr->show)
|
||||
return sysdev_attr->show(sysdev, buffer);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static ssize_t
|
||||
sysdev_store(struct kobject * kobj, struct attribute * attr,
|
||||
const char * buffer, size_t count)
|
||||
{
|
||||
struct sys_device * sysdev = to_sysdev(kobj);
|
||||
struct sysdev_attribute * sysdev_attr = to_sysdev_attr(attr);
|
||||
|
||||
if (sysdev_attr->store)
|
||||
return sysdev_attr->store(sysdev, buffer, count);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct sysfs_ops sysfs_ops = {
|
||||
.show = sysdev_show,
|
||||
.store = sysdev_store,
|
||||
};
|
||||
|
||||
static struct kobj_type ktype_sysdev = {
|
||||
.sysfs_ops = &sysfs_ops,
|
||||
};
|
||||
|
||||
|
||||
int sysdev_create_file(struct sys_device * s, struct sysdev_attribute * a)
|
||||
{
|
||||
return sysfs_create_file(&s->kobj, &a->attr);
|
||||
}
|
||||
|
||||
|
||||
void sysdev_remove_file(struct sys_device * s, struct sysdev_attribute * a)
|
||||
{
|
||||
sysfs_remove_file(&s->kobj, &a->attr);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL_GPL(sysdev_create_file);
|
||||
EXPORT_SYMBOL_GPL(sysdev_remove_file);
|
||||
|
||||
/*
|
||||
* declare system_subsys
|
||||
*/
|
||||
static decl_subsys(system, &ktype_sysdev, NULL);
|
||||
|
||||
int sysdev_class_register(struct sysdev_class * cls)
|
||||
{
|
||||
pr_debug("Registering sysdev class '%s'\n",
|
||||
kobject_name(&cls->kset.kobj));
|
||||
INIT_LIST_HEAD(&cls->drivers);
|
||||
cls->kset.subsys = &system_subsys;
|
||||
kset_set_kset_s(cls, system_subsys);
|
||||
return kset_register(&cls->kset);
|
||||
}
|
||||
|
||||
void sysdev_class_unregister(struct sysdev_class * cls)
|
||||
{
|
||||
pr_debug("Unregistering sysdev class '%s'\n",
|
||||
kobject_name(&cls->kset.kobj));
|
||||
kset_unregister(&cls->kset);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL_GPL(sysdev_class_register);
|
||||
EXPORT_SYMBOL_GPL(sysdev_class_unregister);
|
||||
|
||||
|
||||
static LIST_HEAD(sysdev_drivers);
|
||||
static DECLARE_MUTEX(sysdev_drivers_lock);
|
||||
|
||||
/**
|
||||
* sysdev_driver_register - Register auxillary driver
|
||||
* @cls: Device class driver belongs to.
|
||||
* @drv: Driver.
|
||||
*
|
||||
* If @cls is valid, then @drv is inserted into @cls->drivers to be
|
||||
* called on each operation on devices of that class. The refcount
|
||||
* of @cls is incremented.
|
||||
* Otherwise, @drv is inserted into sysdev_drivers, and called for
|
||||
* each device.
|
||||
*/
|
||||
|
||||
int sysdev_driver_register(struct sysdev_class * cls,
|
||||
struct sysdev_driver * drv)
|
||||
{
|
||||
down(&sysdev_drivers_lock);
|
||||
if (cls && kset_get(&cls->kset)) {
|
||||
list_add_tail(&drv->entry, &cls->drivers);
|
||||
|
||||
/* If devices of this class already exist, tell the driver */
|
||||
if (drv->add) {
|
||||
struct sys_device *dev;
|
||||
list_for_each_entry(dev, &cls->kset.list, kobj.entry)
|
||||
drv->add(dev);
|
||||
}
|
||||
} else
|
||||
list_add_tail(&drv->entry, &sysdev_drivers);
|
||||
up(&sysdev_drivers_lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* sysdev_driver_unregister - Remove an auxillary driver.
|
||||
* @cls: Class driver belongs to.
|
||||
* @drv: Driver.
|
||||
*/
|
||||
void sysdev_driver_unregister(struct sysdev_class * cls,
|
||||
struct sysdev_driver * drv)
|
||||
{
|
||||
down(&sysdev_drivers_lock);
|
||||
list_del_init(&drv->entry);
|
||||
if (cls) {
|
||||
if (drv->remove) {
|
||||
struct sys_device *dev;
|
||||
list_for_each_entry(dev, &cls->kset.list, kobj.entry)
|
||||
drv->remove(dev);
|
||||
}
|
||||
kset_put(&cls->kset);
|
||||
}
|
||||
up(&sysdev_drivers_lock);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL_GPL(sysdev_driver_register);
|
||||
EXPORT_SYMBOL_GPL(sysdev_driver_unregister);
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* sysdev_register - add a system device to the tree
|
||||
* @sysdev: device in question
|
||||
*
|
||||
*/
|
||||
int sysdev_register(struct sys_device * sysdev)
|
||||
{
|
||||
int error;
|
||||
struct sysdev_class * cls = sysdev->cls;
|
||||
|
||||
if (!cls)
|
||||
return -EINVAL;
|
||||
|
||||
/* Make sure the kset is set */
|
||||
sysdev->kobj.kset = &cls->kset;
|
||||
|
||||
/* But make sure we point to the right type for sysfs translation */
|
||||
sysdev->kobj.ktype = &ktype_sysdev;
|
||||
error = kobject_set_name(&sysdev->kobj, "%s%d",
|
||||
kobject_name(&cls->kset.kobj), sysdev->id);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
pr_debug("Registering sys device '%s'\n", kobject_name(&sysdev->kobj));
|
||||
|
||||
/* Register the object */
|
||||
error = kobject_register(&sysdev->kobj);
|
||||
|
||||
if (!error) {
|
||||
struct sysdev_driver * drv;
|
||||
|
||||
down(&sysdev_drivers_lock);
|
||||
/* Generic notification is implicit, because it's that
|
||||
* code that should have called us.
|
||||
*/
|
||||
|
||||
/* Notify global drivers */
|
||||
list_for_each_entry(drv, &sysdev_drivers, entry) {
|
||||
if (drv->add)
|
||||
drv->add(sysdev);
|
||||
}
|
||||
|
||||
/* Notify class auxillary drivers */
|
||||
list_for_each_entry(drv, &cls->drivers, entry) {
|
||||
if (drv->add)
|
||||
drv->add(sysdev);
|
||||
}
|
||||
up(&sysdev_drivers_lock);
|
||||
}
|
||||
return error;
|
||||
}
|
||||
|
||||
void sysdev_unregister(struct sys_device * sysdev)
|
||||
{
|
||||
struct sysdev_driver * drv;
|
||||
|
||||
down(&sysdev_drivers_lock);
|
||||
list_for_each_entry(drv, &sysdev_drivers, entry) {
|
||||
if (drv->remove)
|
||||
drv->remove(sysdev);
|
||||
}
|
||||
|
||||
list_for_each_entry(drv, &sysdev->cls->drivers, entry) {
|
||||
if (drv->remove)
|
||||
drv->remove(sysdev);
|
||||
}
|
||||
up(&sysdev_drivers_lock);
|
||||
|
||||
kobject_unregister(&sysdev->kobj);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* sysdev_shutdown - Shut down all system devices.
|
||||
*
|
||||
* Loop over each class of system devices, and the devices in each
|
||||
* of those classes. For each device, we call the shutdown method for
|
||||
* each driver registered for the device - the globals, the auxillaries,
|
||||
* and the class driver.
|
||||
*
|
||||
* Note: The list is iterated in reverse order, so that we shut down
|
||||
* child devices before we shut down thier parents. The list ordering
|
||||
* is guaranteed by virtue of the fact that child devices are registered
|
||||
* after their parents.
|
||||
*/
|
||||
|
||||
void sysdev_shutdown(void)
|
||||
{
|
||||
struct sysdev_class * cls;
|
||||
|
||||
pr_debug("Shutting Down System Devices\n");
|
||||
|
||||
down(&sysdev_drivers_lock);
|
||||
list_for_each_entry_reverse(cls, &system_subsys.kset.list,
|
||||
kset.kobj.entry) {
|
||||
struct sys_device * sysdev;
|
||||
|
||||
pr_debug("Shutting down type '%s':\n",
|
||||
kobject_name(&cls->kset.kobj));
|
||||
|
||||
list_for_each_entry(sysdev, &cls->kset.list, kobj.entry) {
|
||||
struct sysdev_driver * drv;
|
||||
pr_debug(" %s\n", kobject_name(&sysdev->kobj));
|
||||
|
||||
/* Call global drivers first. */
|
||||
list_for_each_entry(drv, &sysdev_drivers, entry) {
|
||||
if (drv->shutdown)
|
||||
drv->shutdown(sysdev);
|
||||
}
|
||||
|
||||
/* Call auxillary drivers next. */
|
||||
list_for_each_entry(drv, &cls->drivers, entry) {
|
||||
if (drv->shutdown)
|
||||
drv->shutdown(sysdev);
|
||||
}
|
||||
|
||||
/* Now call the generic one */
|
||||
if (cls->shutdown)
|
||||
cls->shutdown(sysdev);
|
||||
}
|
||||
}
|
||||
up(&sysdev_drivers_lock);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* sysdev_suspend - Suspend all system devices.
|
||||
* @state: Power state to enter.
|
||||
*
|
||||
* We perform an almost identical operation as sys_device_shutdown()
|
||||
* above, though calling ->suspend() instead. Interrupts are disabled
|
||||
* when this called. Devices are responsible for both saving state and
|
||||
* quiescing or powering down the device.
|
||||
*
|
||||
* This is only called by the device PM core, so we let them handle
|
||||
* all synchronization.
|
||||
*/
|
||||
|
||||
int sysdev_suspend(u32 state)
|
||||
{
|
||||
struct sysdev_class * cls;
|
||||
|
||||
pr_debug("Suspending System Devices\n");
|
||||
|
||||
list_for_each_entry_reverse(cls, &system_subsys.kset.list,
|
||||
kset.kobj.entry) {
|
||||
struct sys_device * sysdev;
|
||||
|
||||
pr_debug("Suspending type '%s':\n",
|
||||
kobject_name(&cls->kset.kobj));
|
||||
|
||||
list_for_each_entry(sysdev, &cls->kset.list, kobj.entry) {
|
||||
struct sysdev_driver * drv;
|
||||
pr_debug(" %s\n", kobject_name(&sysdev->kobj));
|
||||
|
||||
/* Call global drivers first. */
|
||||
list_for_each_entry(drv, &sysdev_drivers, entry) {
|
||||
if (drv->suspend)
|
||||
drv->suspend(sysdev, state);
|
||||
}
|
||||
|
||||
/* Call auxillary drivers next. */
|
||||
list_for_each_entry(drv, &cls->drivers, entry) {
|
||||
if (drv->suspend)
|
||||
drv->suspend(sysdev, state);
|
||||
}
|
||||
|
||||
/* Now call the generic one */
|
||||
if (cls->suspend)
|
||||
cls->suspend(sysdev, state);
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* sysdev_resume - Bring system devices back to life.
|
||||
*
|
||||
* Similar to sys_device_suspend(), but we iterate the list forwards
|
||||
* to guarantee that parent devices are resumed before their children.
|
||||
*
|
||||
* Note: Interrupts are disabled when called.
|
||||
*/
|
||||
|
||||
int sysdev_resume(void)
|
||||
{
|
||||
struct sysdev_class * cls;
|
||||
|
||||
pr_debug("Resuming System Devices\n");
|
||||
|
||||
list_for_each_entry(cls, &system_subsys.kset.list, kset.kobj.entry) {
|
||||
struct sys_device * sysdev;
|
||||
|
||||
pr_debug("Resuming type '%s':\n",
|
||||
kobject_name(&cls->kset.kobj));
|
||||
|
||||
list_for_each_entry(sysdev, &cls->kset.list, kobj.entry) {
|
||||
struct sysdev_driver * drv;
|
||||
pr_debug(" %s\n", kobject_name(&sysdev->kobj));
|
||||
|
||||
/* First, call the class-specific one */
|
||||
if (cls->resume)
|
||||
cls->resume(sysdev);
|
||||
|
||||
/* Call auxillary drivers next. */
|
||||
list_for_each_entry(drv, &cls->drivers, entry) {
|
||||
if (drv->resume)
|
||||
drv->resume(sysdev);
|
||||
}
|
||||
|
||||
/* Call global drivers. */
|
||||
list_for_each_entry(drv, &sysdev_drivers, entry) {
|
||||
if (drv->resume)
|
||||
drv->resume(sysdev);
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int __init system_bus_init(void)
|
||||
{
|
||||
system_subsys.kset.kobj.parent = &devices_subsys.kset.kobj;
|
||||
return subsystem_register(&system_subsys);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL_GPL(sysdev_register);
|
||||
EXPORT_SYMBOL_GPL(sysdev_unregister);
|
||||
Reference in New Issue
Block a user