diff options
Diffstat (limited to 'drivers/base/sys.c')
| -rw-r--r-- | drivers/base/sys.c | 383 |
1 files changed, 0 insertions, 383 deletions
diff --git a/drivers/base/sys.c b/drivers/base/sys.c deleted file mode 100644 index 409f5ce..0000000 --- a/drivers/base/sys.c +++ /dev/null @@ -1,383 +0,0 @@ -/* - * 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/sysdev.h> -#include <linux/err.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/string.h> -#include <linux/pm.h> -#include <linux/device.h> -#include <linux/mutex.h> -#include <linux/interrupt.h> - -#include "base.h" - -#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, sysdev_attr, buffer); - return -EIO; -} - - -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, sysdev_attr, buffer, count); - return -EIO; -} - -static const 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); - -#define to_sysdev_class(k) container_of(k, struct sysdev_class, kset.kobj) -#define to_sysdev_class_attr(a) container_of(a, \ - struct sysdev_class_attribute, attr) - -static ssize_t sysdev_class_show(struct kobject *kobj, struct attribute *attr, - char *buffer) -{ - struct sysdev_class *class = to_sysdev_class(kobj); - struct sysdev_class_attribute *class_attr = to_sysdev_class_attr(attr); - - if (class_attr->show) - return class_attr->show(class, class_attr, buffer); - return -EIO; -} - -static ssize_t sysdev_class_store(struct kobject *kobj, struct attribute *attr, - const char *buffer, size_t count) -{ - struct sysdev_class *class = to_sysdev_class(kobj); - struct sysdev_class_attribute *class_attr = to_sysdev_class_attr(attr); - - if (class_attr->store) - return class_attr->store(class, class_attr, buffer, count); - return -EIO; -} - -static const struct sysfs_ops sysfs_class_ops = { - .show = sysdev_class_show, - .store = sysdev_class_store, -}; - -static struct kobj_type ktype_sysdev_class = { - .sysfs_ops = &sysfs_class_ops, -}; - -int sysdev_class_create_file(struct sysdev_class *c, - struct sysdev_class_attribute *a) -{ - return sysfs_create_file(&c->kset.kobj, &a->attr); -} -EXPORT_SYMBOL_GPL(sysdev_class_create_file); - -void sysdev_class_remove_file(struct sysdev_class *c, - struct sysdev_class_attribute *a) -{ - sysfs_remove_file(&c->kset.kobj, &a->attr); -} -EXPORT_SYMBOL_GPL(sysdev_class_remove_file); - -extern struct kset *system_kset; - -int sysdev_class_register(struct sysdev_class *cls) -{ - int retval; - - pr_debug("Registering sysdev class '%s'\n", cls->name); - - INIT_LIST_HEAD(&cls->drivers); - memset(&cls->kset.kobj, 0x00, sizeof(struct kobject)); - cls->kset.kobj.parent = &system_kset->kobj; - cls->kset.kobj.ktype = &ktype_sysdev_class; - cls->kset.kobj.kset = system_kset; - - retval = kobject_set_name(&cls->kset.kobj, "%s", cls->name); - if (retval) - return retval; - - retval = kset_register(&cls->kset); - if (!retval && cls->attrs) - retval = sysfs_create_files(&cls->kset.kobj, - (const struct attribute **)cls->attrs); - return retval; -} - -void sysdev_class_unregister(struct sysdev_class *cls) -{ - pr_debug("Unregistering sysdev class '%s'\n", - kobject_name(&cls->kset.kobj)); - if (cls->attrs) - sysfs_remove_files(&cls->kset.kobj, - (const struct attribute **)cls->attrs); - kset_unregister(&cls->kset); -} - -EXPORT_SYMBOL_GPL(sysdev_class_register); -EXPORT_SYMBOL_GPL(sysdev_class_unregister); - -static DEFINE_MUTEX(sysdev_drivers_lock); - -/* - * @dev != NULL means that we're unwinding because some drv->add() - * failed for some reason. You need to grab sysdev_drivers_lock before - * calling this. - */ -static void __sysdev_driver_remove(struct sysdev_class *cls, - struct sysdev_driver *drv, - struct sys_device *from_dev) -{ - struct sys_device *dev = from_dev; - - list_del_init(&drv->entry); - if (!cls) - return; - - if (!drv->remove) - goto kset_put; - - if (dev) - list_for_each_entry_continue_reverse(dev, &cls->kset.list, - kobj.entry) - drv->remove(dev); - else - list_for_each_entry(dev, &cls->kset.list, kobj.entry) - drv->remove(dev); - -kset_put: - kset_put(&cls->kset); -} - -/** - * sysdev_driver_register - Register auxiliary driver - * @cls: Device class driver belongs to. - * @drv: Driver. - * - * @drv is inserted into @cls->drivers to be - * called on each operation on devices of that class. The refcount - * of @cls is incremented. - */ -int sysdev_driver_register(struct sysdev_class *cls, struct sysdev_driver *drv) -{ - struct sys_device *dev = NULL; - int err = 0; - - if (!cls) { - WARN(1, KERN_WARNING "sysdev: invalid class passed to %s!\n", - __func__); - return -EINVAL; - } - - /* Check whether this driver has already been added to a class. */ - if (drv->entry.next && !list_empty(&drv->entry)) - WARN(1, KERN_WARNING "sysdev: class %s: driver (%p) has already" - " been registered to a class, something is wrong, but " - "will forge on!\n", cls->name, drv); - - mutex_lock(&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) { - list_for_each_entry(dev, &cls->kset.list, kobj.entry) { - err = drv->add(dev); - if (err) - goto unwind; - } - } - } else { - err = -EINVAL; - WARN(1, KERN_ERR "%s: invalid device class\n", __func__); - } - - goto unlock; - -unwind: - __sysdev_driver_remove(cls, drv, dev); - -unlock: - mutex_unlock(&sysdev_drivers_lock); - return err; -} - -/** - * sysdev_driver_unregister - Remove an auxiliary driver. - * @cls: Class driver belongs to. - * @drv: Driver. - */ -void sysdev_driver_unregister(struct sysdev_class *cls, - struct sysdev_driver *drv) -{ - mutex_lock(&sysdev_drivers_lock); - __sysdev_driver_remove(cls, drv, NULL); - mutex_unlock(&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; - - pr_debug("Registering sys device of class '%s'\n", - kobject_name(&cls->kset.kobj)); - - /* initialize the kobject to 0, in case it had previously been used */ - memset(&sysdev->kobj, 0x00, sizeof(struct kobject)); - - /* Make sure the kset is set */ - sysdev->kobj.kset = &cls->kset; - - /* Register the object */ - error = kobject_init_and_add(&sysdev->kobj, &ktype_sysdev, NULL, - "%s%d", kobject_name(&cls->kset.kobj), - sysdev->id); - - if (!error) { - struct sysdev_driver *drv; - - pr_debug("Registering sys device '%s'\n", - kobject_name(&sysdev->kobj)); - - mutex_lock(&sysdev_drivers_lock); - /* Generic notification is implicit, because it's that - * code that should have called us. - */ - - /* Notify class auxiliary drivers */ - list_for_each_entry(drv, &cls->drivers, entry) { - if (drv->add) - drv->add(sysdev); - } - mutex_unlock(&sysdev_drivers_lock); - kobject_uevent(&sysdev->kobj, KOBJ_ADD); - } - - return error; -} - -void sysdev_unregister(struct sys_device *sysdev) -{ - struct sysdev_driver *drv; - - mutex_lock(&sysdev_drivers_lock); - list_for_each_entry(drv, &sysdev->cls->drivers, entry) { - if (drv->remove) - drv->remove(sysdev); - } - mutex_unlock(&sysdev_drivers_lock); - - kobject_put(&sysdev->kobj); -} - -EXPORT_SYMBOL_GPL(sysdev_register); -EXPORT_SYMBOL_GPL(sysdev_unregister); - -#define to_ext_attr(x) container_of(x, struct sysdev_ext_attribute, attr) - -ssize_t sysdev_store_ulong(struct sys_device *sysdev, - struct sysdev_attribute *attr, - const char *buf, size_t size) -{ - struct sysdev_ext_attribute *ea = to_ext_attr(attr); - char *end; - unsigned long new = simple_strtoul(buf, &end, 0); - if (end == buf) - return -EINVAL; - *(unsigned long *)(ea->var) = new; - /* Always return full write size even if we didn't consume all */ - return size; -} -EXPORT_SYMBOL_GPL(sysdev_store_ulong); - -ssize_t sysdev_show_ulong(struct sys_device *sysdev, - struct sysdev_attribute *attr, - char *buf) -{ - struct sysdev_ext_attribute *ea = to_ext_attr(attr); - return snprintf(buf, PAGE_SIZE, "%lx\n", *(unsigned long *)(ea->var)); -} -EXPORT_SYMBOL_GPL(sysdev_show_ulong); - -ssize_t sysdev_store_int(struct sys_device *sysdev, - struct sysdev_attribute *attr, - const char *buf, size_t size) -{ - struct sysdev_ext_attribute *ea = to_ext_attr(attr); - char *end; - long new = simple_strtol(buf, &end, 0); - if (end == buf || new > INT_MAX || new < INT_MIN) - return -EINVAL; - *(int *)(ea->var) = new; - /* Always return full write size even if we didn't consume all */ - return size; -} -EXPORT_SYMBOL_GPL(sysdev_store_int); - -ssize_t sysdev_show_int(struct sys_device *sysdev, - struct sysdev_attribute *attr, - char *buf) -{ - struct sysdev_ext_attribute *ea = to_ext_attr(attr); - return snprintf(buf, PAGE_SIZE, "%d\n", *(int *)(ea->var)); -} -EXPORT_SYMBOL_GPL(sysdev_show_int); - |
