[net-next-2.6.git] / include / linux / device.h

/*
 * device.h - generic, centralized driver model
 *
 * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
 *
 * This file is released under the GPLv2
 *
 * See Documentation/driver-model/ for more information.
 */

#ifndef _DEVICE_H_
#define _DEVICE_H_

#include <linux/ioport.h>
#include <linux/kobject.h>
#include <linux/klist.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <asm/semaphore.h>
#include <asm/atomic.h>

#define DEVICE_NAME_SIZE	50
#define DEVICE_NAME_HALF	__stringify(20)	/* Less than half to accommodate slop */
#define DEVICE_ID_SIZE		32
#define BUS_ID_SIZE		KOBJ_NAME_LEN


struct device;
struct device_driver;
struct class;
struct class_device;

struct bus_type {
	const char		* name;

	struct subsystem	subsys;
	struct kset		drivers;
	struct kset		devices;
	struct klist		klist_devices;
	struct klist		klist_drivers;

	struct bus_attribute	* bus_attrs;
	struct device_attribute	* dev_attrs;
	struct driver_attribute	* drv_attrs;

	int		(*match)(struct device * dev, struct device_driver * drv);
	int		(*uevent)(struct device *dev, char **envp,
				  int num_envp, char *buffer, int buffer_size);
	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);
};

extern int bus_register(struct bus_type * bus);
extern void bus_unregister(struct bus_type * bus);

extern void bus_rescan_devices(struct bus_type * bus);

/* iterator helpers for buses */

int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data,
		     int (*fn)(struct device *, void *));
struct device * bus_find_device(struct bus_type *bus, struct device *start,
				void *data, int (*match)(struct device *, void *));

int bus_for_each_drv(struct bus_type * bus, struct device_driver * start, 
		     void * data, int (*fn)(struct device_driver *, void *));


/* driverfs interface for exporting bus attributes */

struct bus_attribute {
	struct attribute	attr;
	ssize_t (*show)(struct bus_type *, char * buf);
	ssize_t (*store)(struct bus_type *, const char * buf, size_t count);
};

#define BUS_ATTR(_name,_mode,_show,_store)	\
struct bus_attribute bus_attr_##_name = __ATTR(_name,_mode,_show,_store)

extern int bus_create_file(struct bus_type *, struct bus_attribute *);
extern void bus_remove_file(struct bus_type *, struct bus_attribute *);

struct device_driver {
	const char		* name;
	struct bus_type		* bus;

	struct completion	unloaded;
	struct kobject		kobj;
	struct klist		klist_devices;
	struct klist_node	knode_bus;

	struct module		* owner;

	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);
};


extern int driver_register(struct device_driver * drv);
extern void driver_unregister(struct device_driver * drv);

extern struct device_driver * get_driver(struct device_driver * drv);
extern void put_driver(struct device_driver * drv);
extern struct device_driver *driver_find(const char *name, struct bus_type *bus);


/* driverfs interface for exporting driver attributes */

struct driver_attribute {
	struct attribute	attr;
	ssize_t (*show)(struct device_driver *, char * buf);
	ssize_t (*store)(struct device_driver *, const char * buf, size_t count);
};

#define DRIVER_ATTR(_name,_mode,_show,_store)	\
struct driver_attribute driver_attr_##_name = __ATTR(_name,_mode,_show,_store)

extern int driver_create_file(struct device_driver *, struct driver_attribute *);
extern void driver_remove_file(struct device_driver *, struct driver_attribute *);

extern int driver_for_each_device(struct device_driver * drv, struct device * start,
				  void * data, int (*fn)(struct device *, void *));
struct device * driver_find_device(struct device_driver *drv,
				   struct device *start, void *data,
				   int (*match)(struct device *, void *));


/*
 * device classes
 */
struct class {
	const char		* name;
	struct module		* owner;

	struct subsystem	subsys;
	struct list_head	children;
	struct list_head	devices;
	struct list_head	interfaces;
	struct semaphore	sem;	/* locks both the children and interfaces lists */

	struct class_attribute		* class_attrs;
	struct class_device_attribute	* class_dev_attrs;

	int	(*uevent)(struct class_device *dev, char **envp,
			   int num_envp, char *buffer, int buffer_size);

	void	(*release)(struct class_device *dev);
	void	(*class_release)(struct class *class);
};

extern int class_register(struct class *);
extern void class_unregister(struct class *);


struct class_attribute {
	struct attribute	attr;
	ssize_t (*show)(struct class *, char * buf);
	ssize_t (*store)(struct class *, const char * buf, size_t count);
};

#define CLASS_ATTR(_name,_mode,_show,_store)			\
struct class_attribute class_attr_##_name = __ATTR(_name,_mode,_show,_store) 

extern int class_create_file(struct class *, const struct class_attribute *);
extern void class_remove_file(struct class *, const struct class_attribute *);

struct class_device_attribute {
	struct attribute	attr;
	ssize_t (*show)(struct class_device *, char * buf);
	ssize_t (*store)(struct class_device *, const char * buf, size_t count);
};

#define CLASS_DEVICE_ATTR(_name,_mode,_show,_store)		\
struct class_device_attribute class_device_attr_##_name = 	\
	__ATTR(_name,_mode,_show,_store)

extern int class_device_create_file(struct class_device *,
				    const struct class_device_attribute *);

/**
 * struct class_device - class devices
 * @class: pointer to the parent class for this class device.  This is required.
 * @devt: for internal use by the driver core only.
 * @node: for internal use by the driver core only.
 * @kobj: for internal use by the driver core only.
 * @devt_attr: for internal use by the driver core only.
 * @groups: optional additional groups to be created
 * @dev: if set, a symlink to the struct device is created in the sysfs
 * directory for this struct class device.
 * @class_data: pointer to whatever you want to store here for this struct
 * class_device.  Use class_get_devdata() and class_set_devdata() to get and
 * set this pointer.
 * @parent: pointer to a struct class_device that is the parent of this struct
 * class_device.  If NULL, this class_device will show up at the root of the
 * struct class in sysfs (which is probably what you want to have happen.)
 * @release: pointer to a release function for this struct class_device.  If
 * set, this will be called instead of the class specific release function.
 * Only use this if you want to override the default release function, like
 * when you are nesting class_device structures.
 * @uevent: pointer to a uevent function for this struct class_device.  If
 * set, this will be called instead of the class specific uevent function.
 * Only use this if you want to override the default uevent function, like
 * when you are nesting class_device structures.
 */
struct class_device {
	struct list_head	node;

	struct kobject		kobj;
	struct class		* class;	/* required */
	dev_t			devt;		/* dev_t, creates the sysfs "dev" */
	struct class_device_attribute *devt_attr;
	struct class_device_attribute uevent_attr;
	struct device		* dev;		/* not necessary, but nice to have */
	void			* class_data;	/* class-specific data */
	struct class_device	*parent;	/* parent of this child device, if there is one */
	struct attribute_group  ** groups;	/* optional groups */

	void	(*release)(struct class_device *dev);
	int	(*uevent)(struct class_device *dev, char **envp,
			   int num_envp, char *buffer, int buffer_size);
	char	class_id[BUS_ID_SIZE];	/* unique to this class */
};

static inline void *
class_get_devdata (struct class_device *dev)
{
	return dev->class_data;
}

static inline void
class_set_devdata (struct class_device *dev, void *data)
{
	dev->class_data = data;
}


extern int class_device_register(struct class_device *);
extern void class_device_unregister(struct class_device *);
extern void class_device_initialize(struct class_device *);
extern int class_device_add(struct class_device *);
extern void class_device_del(struct class_device *);

extern int class_device_rename(struct class_device *, char *);

extern struct class_device * class_device_get(struct class_device *);
extern void class_device_put(struct class_device *);

extern void class_device_remove_file(struct class_device *, 
				     const struct class_device_attribute *);
extern int class_device_create_bin_file(struct class_device *,
					struct bin_attribute *);
extern void class_device_remove_bin_file(struct class_device *,
					 struct bin_attribute *);

struct class_interface {
	struct list_head	node;
	struct class		*class;

	int (*add)	(struct class_device *, struct class_interface *);
	void (*remove)	(struct class_device *, struct class_interface *);
};

extern int class_interface_register(struct class_interface *);
extern void class_interface_unregister(struct class_interface *);

extern struct class *class_create(struct module *owner, const char *name);
extern void class_destroy(struct class *cls);
extern struct class_device *class_device_create(struct class *cls,
						struct class_device *parent,
						dev_t devt,
						struct device *device,
						const char *fmt, ...)
					__attribute__((format(printf,5,6)));
extern void class_device_destroy(struct class *cls, dev_t devt);


/* interface for exporting device attributes */
struct device_attribute {
	struct attribute	attr;
	ssize_t (*show)(struct device *dev, struct device_attribute *attr,
			char *buf);
	ssize_t (*store)(struct device *dev, struct device_attribute *attr,
			 const char *buf, size_t count);
};

#define DEVICE_ATTR(_name,_mode,_show,_store) \
struct device_attribute dev_attr_##_name = __ATTR(_name,_mode,_show,_store)

extern int device_create_file(struct device *device, struct device_attribute * entry);
extern void device_remove_file(struct device * dev, struct device_attribute * attr);
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 kobject kobj;
	char	bus_id[BUS_ID_SIZE];	/* position on parent bus */
	struct device_attribute uevent_attr;
	struct device_attribute *devt_attr;

	struct semaphore	sem;	/* semaphore 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 */
	void		*firmware_data; /* Firmware specific data (e.g. ACPI,
					   BIOS data),reserved for device core*/
	struct dev_pm_info	power;

	u64		*dma_mask;	/* dma mask (if dma'able device) */
	u64		coherent_dma_mask;/* Like dma_mask, but for
					     alloc_coherent mappings as
					     not all hardware supports
					     64 bit addresses for consistent
					     allocations such descriptors. */

	struct list_head	dma_pools;	/* dma pools (if dma'ble) */

	struct dma_coherent_mem	*dma_mem; /* internal for coherent mem
					     override */

	/* class_device migration path */
	struct list_head	node;
	struct class		*class;		/* optional*/
	dev_t			devt;		/* dev_t, creates the sysfs "dev" */

	void	(*release)(struct device * dev);
};

static inline void *
dev_get_drvdata (struct device *dev)
{
	return dev->driver_data;
}

static inline void
dev_set_drvdata (struct device *dev, void *data)
{
	dev->driver_data = data;
}

static inline int device_is_registered(struct device *dev)
{
	return klist_node_attached(&dev->knode_bus);
}

/*
 * High level routines for use by the bus drivers
 */
extern int device_register(struct device * dev);
extern void device_unregister(struct device * dev);
extern void device_initialize(struct device * dev);
extern int device_add(struct device * dev);
extern void device_del(struct device * dev);
extern int device_for_each_child(struct device *, void *,
		     int (*fn)(struct device *, void *));

/*
 * Manual binding of a device to driver. See drivers/base/bus.c
 * for information on use.
 */
extern void device_bind_driver(struct device * dev);
extern void device_release_driver(struct device * dev);
extern int  device_attach(struct device * dev);
extern void driver_attach(struct device_driver * drv);
extern void device_reprobe(struct device *dev);

/*
 * Easy functions for dynamically creating devices on the fly
 */
extern struct device *device_create(struct class *cls, struct device *parent,
				    dev_t devt, const char *fmt, ...)
				    __attribute__((format(printf,4,5)));
extern void device_destroy(struct class *cls, dev_t devt);

/*
 * Platform "fixup" functions - allow the platform to have their say
 * about devices and actions that the general device layer doesn't
 * know about.
 */
/* Notify platform of device discovery */
extern int (*platform_notify)(struct device * dev);

extern int (*platform_notify_remove)(struct device * dev);


/**
 * get_device - atomically increment the reference count for the device.
 *
 */
extern struct device * get_device(struct device * dev);
extern void put_device(struct device * dev);


/* drivers/base/power/shutdown.c */
extern void device_shutdown(void);


/* drivers/base/firmware.c */
extern int firmware_register(struct subsystem *);
extern void firmware_unregister(struct subsystem *);

/* debugging and troubleshooting/diagnostic helpers. */
extern const char *dev_driver_string(struct device *dev);
#define dev_printk(level, dev, format, arg...)	\
	printk(level "%s %s: " format , dev_driver_string(dev) , (dev)->bus_id , ## arg)

#ifdef DEBUG
#define dev_dbg(dev, format, arg...)		\
	dev_printk(KERN_DEBUG , dev , format , ## arg)
#else
#define dev_dbg(dev, format, arg...) do { (void)(dev); } while (0)
#endif

#define dev_err(dev, format, arg...)		\
	dev_printk(KERN_ERR , dev , format , ## arg)
#define dev_info(dev, format, arg...)		\
	dev_printk(KERN_INFO , dev , format , ## arg)
#define dev_warn(dev, format, arg...)		\
	dev_printk(KERN_WARNING , dev , format , ## arg)
#define dev_notice(dev, format, arg...)		\
	dev_printk(KERN_NOTICE , dev , format , ## arg)

/* Create alias, so I can be autoloaded. */
#define MODULE_ALIAS_CHARDEV(major,minor) \
	MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))
#define MODULE_ALIAS_CHARDEV_MAJOR(major) \
	MODULE_ALIAS("char-major-" __stringify(major) "-*")
#endif /* _DEVICE_H_ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* device.h - generic, centralized driver model
	3	*
	4	* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
	5	*
	6	* This file is released under the GPLv2
	7	*
	8	* See Documentation/driver-model/ for more information.
	9	*/
	10
	11	#ifndef _DEVICE_H_
	12	#define _DEVICE_H_
	13
1da177e4 LT	14	#include <linux/ioport.h>
1da177e4 LT	15	#include <linux/kobject.h>
465c7a3a	16	#include <linux/klist.h>
1da177e4 LT	17	#include <linux/list.h>
	18	#include <linux/types.h>
	19	#include <linux/module.h>
	20	#include <linux/pm.h>
	21	#include <asm/semaphore.h>
	22	#include <asm/atomic.h>
	23
	24	#define DEVICE_NAME_SIZE 50
	25	#define DEVICE_NAME_HALF __stringify(20) /* Less than half to accommodate slop */
	26	#define DEVICE_ID_SIZE 32
	27	#define BUS_ID_SIZE KOBJ_NAME_LEN
	28
	29
1da177e4 LT	30	struct device;
	31	struct device_driver;
	32	struct class;
	33	struct class_device;
1da177e4 LT	34
1da177e4 LT	35	struct bus_type {
8d790d74	36	const char * name;
1da177e4 LT	37
	38	struct subsystem subsys;
	39	struct kset drivers;
	40	struct kset devices;
465c7a3a	41	struct klist klist_devices;
38fdac3c	42	struct klist klist_drivers;
1da177e4 LT	43
	44	struct bus_attribute * bus_attrs;
	45	struct device_attribute * dev_attrs;
	46	struct driver_attribute * drv_attrs;
	47
	48	int (match)(struct device dev, struct device_driver * drv);
312c004d KS	49	int (uevent)(struct device dev, char **envp,
312c004d KS	50	int num_envp, char *buffer, int buffer_size);
594c8281 RK	51	int (probe)(struct device dev);
	52	int (remove)(struct device dev);
	53	void (shutdown)(struct device dev);
1da177e4 LT	54	int (suspend)(struct device dev, pm_message_t state);
	55	int (resume)(struct device dev);
	56	};
	57
	58	extern int bus_register(struct bus_type * bus);
	59	extern void bus_unregister(struct bus_type * bus);
	60
23d3d602	61	extern void bus_rescan_devices(struct bus_type * bus);
1da177e4	62
1da177e4 LT	63	/* iterator helpers for buses */
	64
	65	int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data,
	66	int (fn)(struct device , void *));
0edb5860 CH	67	struct device * bus_find_device(struct bus_type bus, struct device start,
0edb5860 CH	68	void data, int (match)(struct device , void ));
1da177e4 LT	69
	70	int bus_for_each_drv(struct bus_type * bus, struct device_driver * start,
	71	void * data, int (fn)(struct device_driver , void *));
	72
	73
	74	/* driverfs interface for exporting bus attributes */
	75
	76	struct bus_attribute {
	77	struct attribute attr;
	78	ssize_t (show)(struct bus_type , char * buf);
	79	ssize_t (store)(struct bus_type , const char * buf, size_t count);
	80	};
	81
	82	#define BUS_ATTR(_name,_mode,_show,_store) \
	83	struct bus_attribute bus_attr_##_name = __ATTR(_name,_mode,_show,_store)
	84
	85	extern int bus_create_file(struct bus_type , struct bus_attribute );
	86	extern void bus_remove_file(struct bus_type , struct bus_attribute );
	87
	88	struct device_driver {
8d790d74	89	const char * name;
1da177e4 LT	90	struct bus_type * bus;
	91
	92	struct completion unloaded;
	93	struct kobject kobj;
94e7b1c5	94	struct klist klist_devices;
38fdac3c	95	struct klist_node knode_bus;
1da177e4	96
8d790d74	97	struct module * owner;
1da177e4 LT	98
1da177e4 LT	99	int (probe) (struct device dev);
8d790d74	100	int (remove) (struct device dev);
1da177e4	101	void (shutdown) (struct device dev);
9480e307 RK	102	int (suspend) (struct device dev, pm_message_t state);
9480e307 RK	103	int (resume) (struct device dev);
1da177e4 LT	104	};
	105
	106
	107	extern int driver_register(struct device_driver * drv);
	108	extern void driver_unregister(struct device_driver * drv);
	109
	110	extern struct device_driver * get_driver(struct device_driver * drv);
	111	extern void put_driver(struct device_driver * drv);
	112	extern struct device_driver driver_find(const char name, struct bus_type *bus);
	113
	114
	115	/* driverfs interface for exporting driver attributes */
	116
	117	struct driver_attribute {
	118	struct attribute attr;
	119	ssize_t (show)(struct device_driver , char * buf);
	120	ssize_t (store)(struct device_driver , const char * buf, size_t count);
	121	};
	122
	123	#define DRIVER_ATTR(_name,_mode,_show,_store) \
	124	struct driver_attribute driver_attr_##_name = __ATTR(_name,_mode,_show,_store)
	125
	126	extern int driver_create_file(struct device_driver , struct driver_attribute );
	127	extern void driver_remove_file(struct device_driver , struct driver_attribute );
	128
fae3cd00 PM	129	extern int driver_for_each_device(struct device_driver * drv, struct device * start,
fae3cd00 PM	130	void * data, int (fn)(struct device , void *));
0edb5860 CH	131	struct device * driver_find_device(struct device_driver *drv,
	132	struct device start, void data,
	133	int (match)(struct device , void *));
fae3cd00	134
1da177e4 LT	135
	136	/*
	137	* device classes
	138	*/
	139	struct class {
8d790d74	140	const char * name;
e9ba6365	141	struct module * owner;
1da177e4 LT	142
	143	struct subsystem subsys;
	144	struct list_head children;
23681e47	145	struct list_head devices;
1da177e4 LT	146	struct list_head interfaces;
	147	struct semaphore sem; /* locks both the children and interfaces lists */
	148
	149	struct class_attribute * class_attrs;
	150	struct class_device_attribute * class_dev_attrs;
	151
312c004d	152	int (uevent)(struct class_device dev, char **envp,
1da177e4 LT	153	int num_envp, char *buffer, int buffer_size);
	154
	155	void (release)(struct class_device dev);
	156	void (class_release)(struct class class);
	157	};
	158
	159	extern int class_register(struct class *);
	160	extern void class_unregister(struct class *);
	161
1da177e4 LT	162
	163	struct class_attribute {
	164	struct attribute attr;
	165	ssize_t (show)(struct class , char * buf);
	166	ssize_t (store)(struct class , const char * buf, size_t count);
	167	};
	168
	169	#define CLASS_ATTR(_name,_mode,_show,_store) \
	170	struct class_attribute class_attr_##_name = __ATTR(_name,_mode,_show,_store)
	171
	172	extern int class_create_file(struct class , const struct class_attribute );
	173	extern void class_remove_file(struct class , const struct class_attribute );
	174
a7fd6706 KS	175	struct class_device_attribute {
	176	struct attribute attr;
	177	ssize_t (show)(struct class_device , char * buf);
	178	ssize_t (store)(struct class_device , const char * buf, size_t count);
	179	};
	180
	181	#define CLASS_DEVICE_ATTR(_name,_mode,_show,_store) \
	182	struct class_device_attribute class_device_attr_##_name = \
	183	__ATTR(_name,_mode,_show,_store)
	184
	185	extern int class_device_create_file(struct class_device *,
	186	const struct class_device_attribute *);
1da177e4	187
74be227f GKH	188	/**
	189	* struct class_device - class devices
	190	* @class: pointer to the parent class for this class device. This is required.
	191	* @devt: for internal use by the driver core only.
	192	* @node: for internal use by the driver core only.
	193	* @kobj: for internal use by the driver core only.
	194	* @devt_attr: for internal use by the driver core only.
1498221d	195	* @groups: optional additional groups to be created
74be227f GKH	196	* @dev: if set, a symlink to the struct device is created in the sysfs
	197	* directory for this struct class device.
	198	* @class_data: pointer to whatever you want to store here for this struct
	199	* class_device. Use class_get_devdata() and class_set_devdata() to get and
	200	* set this pointer.
	201	* @parent: pointer to a struct class_device that is the parent of this struct
	202	* class_device. If NULL, this class_device will show up at the root of the
	203	* struct class in sysfs (which is probably what you want to have happen.)
	204	* @release: pointer to a release function for this struct class_device. If
	205	* set, this will be called instead of the class specific release function.
	206	* Only use this if you want to override the default release function, like
	207	* when you are nesting class_device structures.
312c004d KS	208	* @uevent: pointer to a uevent function for this struct class_device. If
	209	* set, this will be called instead of the class specific uevent function.
	210	* Only use this if you want to override the default uevent function, like
74be227f GKH	211	* when you are nesting class_device structures.
74be227f GKH	212	*/
1da177e4 LT	213	struct class_device {
	214	struct list_head node;
	215
	216	struct kobject kobj;
	217	struct class * class; /* required */
	218	dev_t devt; /* dev_t, creates the sysfs "dev" */
e9ba6365	219	struct class_device_attribute *devt_attr;
a7fd6706	220	struct class_device_attribute uevent_attr;
1da177e4 LT	221	struct device * dev; /* not necessary, but nice to have */
1da177e4 LT	222	void * class_data; /* class-specific data */
51d172d5	223	struct class_device parent; / parent of this child device, if there is one */
1498221d	224	struct attribute_group ** groups; /* optional groups */
1da177e4	225
51d172d5	226	void (release)(struct class_device dev);
312c004d	227	int (uevent)(struct class_device dev, char **envp,
51d172d5	228	int num_envp, char *buffer, int buffer_size);
1da177e4 LT	229	char class_id[BUS_ID_SIZE]; /* unique to this class */
	230	};
	231
	232	static inline void *
	233	class_get_devdata (struct class_device *dev)
	234	{
	235	return dev->class_data;
	236	}
	237
	238	static inline void
	239	class_set_devdata (struct class_device dev, void data)
	240	{
	241	dev->class_data = data;
	242	}
	243
	244
	245	extern int class_device_register(struct class_device *);
	246	extern void class_device_unregister(struct class_device *);
	247	extern void class_device_initialize(struct class_device *);
	248	extern int class_device_add(struct class_device *);
	249	extern void class_device_del(struct class_device *);
	250
	251	extern int class_device_rename(struct class_device , char );
	252
	253	extern struct class_device * class_device_get(struct class_device *);
	254	extern void class_device_put(struct class_device *);
	255
1da177e4 LT	256	extern void class_device_remove_file(struct class_device *,
	257	const struct class_device_attribute *);
	258	extern int class_device_create_bin_file(struct class_device *,
	259	struct bin_attribute *);
	260	extern void class_device_remove_bin_file(struct class_device *,
	261	struct bin_attribute *);
	262
	263	struct class_interface {
	264	struct list_head node;
	265	struct class *class;
	266
d8539d81 DT	267	int (add) (struct class_device , struct class_interface *);
d8539d81 DT	268	void (remove) (struct class_device , struct class_interface *);
1da177e4 LT	269	};
	270
	271	extern int class_interface_register(struct class_interface *);
	272	extern void class_interface_unregister(struct class_interface *);
	273
ab7d7371	274	extern struct class class_create(struct module owner, const char *name);
e9ba6365	275	extern void class_destroy(struct class *cls);
51d172d5 GKH	276	extern struct class_device class_device_create(struct class cls,
	277	struct class_device *parent,
	278	dev_t devt,
	279	struct device *device,
ddd5d35a	280	const char *fmt, ...)
51d172d5	281	__attribute__((format(printf,5,6)));
e9ba6365 GKH	282	extern void class_device_destroy(struct class *cls, dev_t devt);
e9ba6365 GKH	283
1da177e4	284
a7fd6706 KS	285	/* interface for exporting device attributes */
	286	struct device_attribute {
	287	struct attribute attr;
	288	ssize_t (show)(struct device dev, struct device_attribute *attr,
	289	char *buf);
	290	ssize_t (store)(struct device dev, struct device_attribute *attr,
	291	const char *buf, size_t count);
	292	};
	293
	294	#define DEVICE_ATTR(_name,_mode,_show,_store) \
	295	struct device_attribute dev_attr_##_name = __ATTR(_name,_mode,_show,_store)
	296
	297	extern int device_create_file(struct device device, struct device_attribute entry);
	298	extern void device_remove_file(struct device * dev, struct device_attribute * attr);
1da177e4	299	struct device {
36239577 PM	300	struct klist klist_children;
36239577 PM	301	struct klist_node knode_parent; /* node in sibling list */
94e7b1c5	302	struct klist_node knode_driver;
465c7a3a	303	struct klist_node knode_bus;
1da177e4 LT	304	struct device * parent;
	305
	306	struct kobject kobj;
	307	char bus_id[BUS_ID_SIZE]; /* position on parent bus */
a7fd6706	308	struct device_attribute uevent_attr;
23681e47	309	struct device_attribute *devt_attr;
1da177e4	310
af70316a PM	311	struct semaphore sem; /* semaphore to synchronize calls to
	312	* its driver.
	313	*/
	314
1da177e4 LT	315	struct bus_type * bus; /* type of bus device is on */
	316	struct device_driver driver; / which driver has allocated this
	317	device */
	318	void driver_data; / data private to the driver */
4e10d12a DSL	319	void platform_data; / Platform specific data, device
	320	core doesn't touch it */
	321	void firmware_data; / Firmware specific data (e.g. ACPI,
	322	BIOS data),reserved for device core*/
1da177e4 LT	323	struct dev_pm_info power;
1da177e4 LT	324
1da177e4 LT	325	u64 dma_mask; / dma mask (if dma'able device) */
	326	u64 coherent_dma_mask;/* Like dma_mask, but for
	327	alloc_coherent mappings as
	328	not all hardware supports
	329	64 bit addresses for consistent
	330	allocations such descriptors. */
	331
	332	struct list_head dma_pools; /* dma pools (if dma'ble) */
	333
	334	struct dma_coherent_mem dma_mem; / internal for coherent mem
	335	override */
	336
23681e47 GKH	337	/* class_device migration path */
	338	struct list_head node;
	339	struct class class; / optional*/
	340	dev_t devt; /* dev_t, creates the sysfs "dev" */
	341
1da177e4 LT	342	void (release)(struct device dev);
	343	};
	344
1da177e4 LT	345	static inline void *
	346	dev_get_drvdata (struct device *dev)
	347	{
	348	return dev->driver_data;
	349	}
	350
	351	static inline void
	352	dev_set_drvdata (struct device dev, void data)
	353	{
	354	dev->driver_data = data;
	355	}
	356
d305ef5d DR	357	static inline int device_is_registered(struct device *dev)
	358	{
	359	return klist_node_attached(&dev->knode_bus);
	360	}
	361
1da177e4 LT	362	/*
	363	* High level routines for use by the bus drivers
	364	*/
	365	extern int device_register(struct device * dev);
	366	extern void device_unregister(struct device * dev);
	367	extern void device_initialize(struct device * dev);
	368	extern int device_add(struct device * dev);
	369	extern void device_del(struct device * dev);
	370	extern int device_for_each_child(struct device , void ,
	371	int (fn)(struct device , void *));
	372
	373	/*
	374	* Manual binding of a device to driver. See drivers/base/bus.c
	375	* for information on use.
	376	*/
1da177e4 LT	377	extern void device_bind_driver(struct device * dev);
	378	extern void device_release_driver(struct device * dev);
	379	extern int device_attach(struct device * dev);
	380	extern void driver_attach(struct device_driver * drv);
e935d5da	381	extern void device_reprobe(struct device *dev);
1da177e4	382
23681e47 GKH	383	/*
	384	* Easy functions for dynamically creating devices on the fly
	385	*/
	386	extern struct device device_create(struct class cls, struct device *parent,
5cbe5f8a	387	dev_t devt, const char *fmt, ...)
23681e47 GKH	388	__attribute__((format(printf,4,5)));
23681e47 GKH	389	extern void device_destroy(struct class *cls, dev_t devt);
1da177e4	390
1da177e4 LT	391	/*
	392	* Platform "fixup" functions - allow the platform to have their say
	393	* about devices and actions that the general device layer doesn't
	394	* know about.
	395	*/
	396	/* Notify platform of device discovery */
	397	extern int (platform_notify)(struct device dev);
	398
	399	extern int (platform_notify_remove)(struct device dev);
	400
	401
	402	/**
	403	* get_device - atomically increment the reference count for the device.
	404	*
	405	*/
	406	extern struct device * get_device(struct device * dev);
	407	extern void put_device(struct device * dev);
1da177e4 LT	408
1da177e4 LT	409
116f232b	410	/* drivers/base/power/shutdown.c */
1da177e4 LT	411	extern void device_shutdown(void);
	412
	413
	414	/* drivers/base/firmware.c */
	415	extern int firmware_register(struct subsystem *);
	416	extern void firmware_unregister(struct subsystem *);
	417
	418	/* debugging and troubleshooting/diagnostic helpers. */
3e95637a	419	extern const char dev_driver_string(struct device dev);
1da177e4	420	#define dev_printk(level, dev, format, arg...) \
3e95637a	421	printk(level "%s %s: " format , dev_driver_string(dev) , (dev)->bus_id , ## arg)
1da177e4 LT	422
	423	#ifdef DEBUG
	424	#define dev_dbg(dev, format, arg...) \
	425	dev_printk(KERN_DEBUG , dev , format , ## arg)
	426	#else
	427	#define dev_dbg(dev, format, arg...) do { (void)(dev); } while (0)
	428	#endif
	429
	430	#define dev_err(dev, format, arg...) \
	431	dev_printk(KERN_ERR , dev , format , ## arg)
	432	#define dev_info(dev, format, arg...) \
	433	dev_printk(KERN_INFO , dev , format , ## arg)
	434	#define dev_warn(dev, format, arg...) \
	435	dev_printk(KERN_WARNING , dev , format , ## arg)
4f2928d0 TS	436	#define dev_notice(dev, format, arg...) \
4f2928d0 TS	437	dev_printk(KERN_NOTICE , dev , format , ## arg)
1da177e4 LT	438
	439	/* Create alias, so I can be autoloaded. */
	440	#define MODULE_ALIAS_CHARDEV(major,minor) \
	441	MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))
	442	#define MODULE_ALIAS_CHARDEV_MAJOR(major) \
	443	MODULE_ALIAS("char-major-" __stringify(major) "-*")
	444	#endif /* _DEVICE_H_ */