* device.h - generic, centralized driver model
*
* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
- * Copyright (c) 2004-2007 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2008-2009 Novell Inc.
*
* This file is released under the GPLv2
*
#include <linux/types.h>
#include <linux/module.h>
#include <linux/pm.h>
-#include <linux/semaphore.h>
#include <asm/atomic.h>
#include <asm/device.h>
-#define BUS_ID_SIZE 20
-
struct device;
+struct device_private;
struct device_driver;
struct driver_private;
struct class;
struct class_private;
struct bus_type;
struct bus_type_private;
+struct device_node;
struct bus_attribute {
struct attribute attr;
void (*shutdown)(struct device *dev);
int (*suspend)(struct device *dev, pm_message_t state);
- int (*suspend_late)(struct device *dev, pm_message_t state);
- int (*resume_early)(struct device *dev);
int (*resume)(struct device *dev);
- struct dev_pm_ops *pm;
+ const struct dev_pm_ops *pm;
struct bus_type_private *p;
};
/* All 4 notifers below get called with the target struct device *
* as an argument. Note that those functions are likely to be called
- * with the device semaphore held in the core, so be careful.
+ * with the device lock held in the core, so be careful.
*/
#define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */
#define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */
#define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */
#define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be
unbound */
+#define BUS_NOTIFY_UNBOUND_DRIVER 0x00000005 /* driver is unbound
+ from the device */
extern struct kset *bus_get_kset(struct bus_type *bus);
extern struct klist *bus_get_device_klist(struct bus_type *bus);
struct bus_type *bus;
struct module *owner;
- const char *mod_name; /* used for built-in modules */
+ const char *mod_name; /* used for built-in modules */
+
+ bool suppress_bind_attrs; /* disables bind/unbind via sysfs */
+
+#if defined(CONFIG_OF)
+ const struct of_device_id *of_match_table;
+#endif
int (*probe) (struct device *dev);
int (*remove) (struct device *dev);
void (*shutdown) (struct device *dev);
int (*suspend) (struct device *dev, pm_message_t state);
int (*resume) (struct device *dev);
- struct attribute_group **groups;
+ const struct attribute_group **groups;
- struct dev_pm_ops *pm;
+ const struct dev_pm_ops *pm;
struct driver_private *p;
};
extern struct device_driver *driver_find(const char *name,
struct bus_type *bus);
extern int driver_probe_done(void);
+extern void wait_for_device_probe(void);
+
/* sysfs interface for exporting driver attributes */
__ATTR(_name, _mode, _show, _store)
extern int __must_check driver_create_file(struct device_driver *driver,
- struct driver_attribute *attr);
+ const struct driver_attribute *attr);
extern void driver_remove_file(struct device_driver *driver,
- struct driver_attribute *attr);
+ const struct driver_attribute *attr);
extern int __must_check driver_add_kobj(struct device_driver *drv,
struct kobject *kobj,
struct kobject *dev_kobj;
int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env);
+ char *(*devnode)(struct device *dev, mode_t *mode);
void (*class_release)(struct class *class);
void (*dev_release)(struct device *dev);
int (*suspend)(struct device *dev, pm_message_t state);
int (*resume)(struct device *dev);
- struct dev_pm_ops *pm;
+ const struct kobj_ns_type_operations *ns_type;
+ const void *(*namespace)(struct device *dev);
+
+ const struct dev_pm_ops *pm;
+
struct class_private *p;
};
__class_register(class, &__key); \
})
+struct class_compat;
+struct class_compat *class_compat_register(const char *name);
+void class_compat_unregister(struct class_compat *cls);
+int class_compat_create_link(struct class_compat *cls, struct device *dev,
+ struct device *device_link);
+void class_compat_remove_link(struct class_compat *cls, struct device *dev,
+ struct device *device_link);
+
extern void class_dev_iter_init(struct class_dev_iter *iter,
struct class *class,
struct device *start,
struct class_attribute {
struct attribute attr;
- ssize_t (*show)(struct class *class, char *buf);
- ssize_t (*store)(struct class *class, const char *buf, size_t count);
+ ssize_t (*show)(struct class *class, struct class_attribute *attr,
+ char *buf);
+ ssize_t (*store)(struct class *class, struct class_attribute *attr,
+ const char *buf, size_t count);
};
#define CLASS_ATTR(_name, _mode, _show, _store) \
extern void class_remove_file(struct class *class,
const struct class_attribute *attr);
+/* Simple class attribute that is just a static string */
+
+struct class_attribute_string {
+ struct class_attribute attr;
+ char *str;
+};
+
+/* Currently read-only only */
+#define _CLASS_ATTR_STRING(_name, _mode, _str) \
+ { __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
+#define CLASS_ATTR_STRING(_name, _mode, _str) \
+ struct class_attribute_string class_attr_##_name = \
+ _CLASS_ATTR_STRING(_name, _mode, _str)
+
+extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr,
+ char *buf);
+
struct class_interface {
struct list_head node;
struct class *class;
*/
struct device_type {
const char *name;
- struct attribute_group **groups;
+ const struct attribute_group **groups;
int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
+ char *(*devnode)(struct device *dev, mode_t *mode);
void (*release)(struct device *dev);
- int (*suspend)(struct device *dev, pm_message_t state);
- int (*resume)(struct device *dev);
-
- struct dev_pm_ops *pm;
+ const struct dev_pm_ops *pm;
};
/* interface for exporting device attributes */
struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
extern int __must_check device_create_file(struct device *device,
- struct device_attribute *entry);
+ const struct device_attribute *entry);
extern void device_remove_file(struct device *dev,
- struct device_attribute *attr);
+ const struct device_attribute *attr);
extern int __must_check device_create_bin_file(struct device *dev,
- struct bin_attribute *attr);
+ const struct bin_attribute *attr);
extern void device_remove_bin_file(struct device *dev,
- struct bin_attribute *attr);
+ const struct bin_attribute *attr);
extern int device_schedule_callback_owner(struct device *dev,
void (*func)(struct device *dev), struct module *owner);
};
struct device {
- struct klist klist_children;
- struct klist_node knode_parent; /* node in sibling list */
- struct klist_node knode_driver;
- struct klist_node knode_bus;
struct device *parent;
+ struct device_private *p;
+
struct kobject kobj;
- char bus_id[BUS_ID_SIZE]; /* position on parent bus */
- unsigned uevent_suppress:1;
const char *init_name; /* initial name of the device */
struct device_type *type;
- struct semaphore sem; /* semaphore to synchronize calls to
+ struct mutex mutex; /* mutex to synchronize calls to
* its driver.
*/
struct bus_type *bus; /* type of bus device is on */
struct device_driver *driver; /* which driver has allocated this
device */
- void *driver_data; /* data private to the driver */
void *platform_data; /* Platform specific data, device
core doesn't touch it */
struct dev_pm_info power;
override */
/* arch specific additions */
struct dev_archdata archdata;
+#ifdef CONFIG_OF
+ struct device_node *of_node;
+#endif
dev_t devt; /* dev_t, creates the sysfs "dev" */
struct klist_node knode_class;
struct class *class;
- struct attribute_group **groups; /* optional groups */
+ const struct attribute_group **groups; /* optional groups */
void (*release)(struct device *dev);
};
static inline const char *dev_name(const struct device *dev)
{
- /* will be changed into kobject_name(&dev->kobj) in the near future */
- return dev->bus_id;
+ /* Use the init name until the kobject becomes available */
+ if (dev->init_name)
+ return dev->init_name;
+
+ return kobject_name(&dev->kobj);
}
extern int dev_set_name(struct device *dev, const char *name, ...)
}
#endif
-static inline void *dev_get_drvdata(const struct device *dev)
+static inline unsigned int dev_get_uevent_suppress(const struct device *dev)
{
- return dev->driver_data;
+ return dev->kobj.uevent_suppress;
}
-static inline void dev_set_drvdata(struct device *dev, void *data)
+static inline void dev_set_uevent_suppress(struct device *dev, int val)
{
- dev->driver_data = data;
+ dev->kobj.uevent_suppress = val;
}
static inline int device_is_registered(struct device *dev)
return dev->kobj.state_in_sysfs;
}
+static inline void device_enable_async_suspend(struct device *dev)
+{
+ if (dev->power.status == DPM_ON)
+ dev->power.async_suspend = true;
+}
+
+static inline void device_disable_async_suspend(struct device *dev)
+{
+ if (dev->power.status == DPM_ON)
+ dev->power.async_suspend = false;
+}
+
+static inline bool device_async_suspend_enabled(struct device *dev)
+{
+ return !!dev->power.async_suspend;
+}
+
+static inline void device_lock(struct device *dev)
+{
+ mutex_lock(&dev->mutex);
+}
+
+static inline int device_trylock(struct device *dev)
+{
+ return mutex_trylock(&dev->mutex);
+}
+
+static inline void device_unlock(struct device *dev)
+{
+ mutex_unlock(&dev->mutex);
+}
+
void driver_init(void);
/*
extern struct device *device_find_child(struct device *dev, void *data,
int (*match)(struct device *dev, void *data));
extern int device_rename(struct device *dev, char *new_name);
-extern int device_move(struct device *dev, struct device *new_parent);
+extern int device_move(struct device *dev, struct device *new_parent,
+ enum dpm_order dpm_order);
+extern const char *device_get_devnode(struct device *dev,
+ mode_t *mode, const char **tmp);
+extern void *dev_get_drvdata(const struct device *dev);
+extern void dev_set_drvdata(struct device *dev, void *data);
+
+/*
+ * Root device objects for grouping under /sys/devices
+ */
+extern struct device *__root_device_register(const char *name,
+ struct module *owner);
+static inline struct device *root_device_register(const char *name)
+{
+ return __root_device_register(name, THIS_MODULE);
+}
+extern void root_device_unregister(struct device *root);
+
+static inline void *dev_get_platdata(const struct device *dev)
+{
+ return dev->platform_data;
+}
/*
* Manual binding of a device to driver. See drivers/base/bus.c
extern struct device *get_device(struct device *dev);
extern void put_device(struct device *dev);
+extern void wait_for_device_probe(void);
+
+#ifdef CONFIG_DEVTMPFS
+extern int devtmpfs_create_node(struct device *dev);
+extern int devtmpfs_delete_node(struct device *dev);
+extern int devtmpfs_mount(const char *mntdir);
+#else
+static inline int devtmpfs_create_node(struct device *dev) { return 0; }
+static inline int devtmpfs_delete_node(struct device *dev) { return 0; }
+static inline int devtmpfs_mount(const char *mountpoint) { return 0; }
+#endif
/* drivers/base/power/shutdown.c */
extern void device_shutdown(void);
#define dev_info(dev, format, arg...) \
dev_printk(KERN_INFO , dev , format , ## arg)
-#if defined(CONFIG_DYNAMIC_PRINTK_DEBUG)
+#if defined(DEBUG)
+#define dev_dbg(dev, format, arg...) \
+ dev_printk(KERN_DEBUG , dev , format , ## arg)
+#elif defined(CONFIG_DYNAMIC_DEBUG)
#define dev_dbg(dev, format, ...) do { \
dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \
} while (0)
-#elif defined(DEBUG)
-#define dev_dbg(dev, format, arg...) \
- dev_printk(KERN_DEBUG , dev , format , ## arg)
#else
#define dev_dbg(dev, format, arg...) \
({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; })
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff