/* * 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/config.h>#include <linux/ioport.h>#include <linux/kobject.h>#include <linux/list.h>#include <linux/spinlock.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 enum { SUSPEND_NOTIFY, SUSPEND_SAVE_STATE, SUSPEND_DISABLE, SUSPEND_POWER_DOWN,}; enum { RESUME_POWER_ON, RESUME_RESTORE_STATE, RESUME_ENABLE,}; struct device;struct device_driver;struct class;struct class_device;struct class_simple; struct bus_type { char * name; struct subsystem subsys; struct kset drivers; struct kset devices; 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 (*hotplug) (struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size); 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 int bus_rescan_devices(struct bus_type * bus); extern struct bus_type * get_bus(struct bus_type * bus);extern void put_bus(struct bus_type * bus); extern struct bus_type * find_bus(char * name); /* iterator helpers for buses */ int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data, int (*fn)(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 { char * name; struct bus_type * bus; struct semaphore unload_sem; struct kobject kobj; struct list_head devices; struct module * owner; int (*probe) (struct device * dev); int (*remove) (struct device * dev); void (*shutdown) (struct device * dev); int (*suspend) (struct device * dev, u32 state, u32 level); int (*resume) (struct device * dev, u32 level);}; 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 *); /* * device classes */struct class { char * name; struct subsystem subsys; struct list_head children; struct list_head interfaces; struct class_attribute * class_attrs; struct class_device_attribute * class_dev_attrs; int (*hotplug)(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 *); extern struct class * class_get(struct class *);extern void class_put(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 { struct list_head node; struct kobject kobj; struct class * class; /* required */ struct device * dev; /* not necessary, but nice to have */ void * class_data; /* class-specific data */ 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 voidclass_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 *); 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 *);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 *); void (*remove) (struct class_device *);}; extern int class_interface_register(struct class_interface *);extern void class_interface_unregister(struct class_interface *); /* interface for class simple stuff */extern struct class_simple *class_simple_create(struct module *owner, char *name);extern void class_simple_destroy(struct class_simple *cs);extern struct class_device *class_simple_device_add(struct class_simple *cs, dev_t dev, struct device *device, const char *fmt, ...) __attribute__((format(printf,4,5)));extern int class_simple_set_hotplug(struct class_simple *, int (*hotplug)(struct class_device *dev, char **envp, int num_envp, char *buffer, int buffer_size));extern void class_simple_device_remove(dev_t dev); struct device { struct list_head node; /* node in sibling list */ struct list_head bus_list; /* node in bus's list */ struct list_head driver_list; struct list_head children; struct device * parent; struct kobject kobj; char bus_id[BUS_ID_SIZE]; /* position on parent bus */ 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 (e.g. ACPI, BIOS data relevant to device) */ struct dev_pm_info power; u32 detach_state; /* State to enter when device is detached from its driver. */ 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 */ void (*release)(struct device * dev);}; static inline struct device *list_to_dev(struct list_head *node){ return list_entry(node, struct device, node);} static inline void *dev_get_drvdata (struct device *dev){ return dev->driver_data;} static inline voiddev_set_drvdata (struct device *dev, void *data){ dev->driver_data = data;} /* * 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 int driver_probe_device(struct device_driver * drv, struct device * dev);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); /* driverfs interface for exporting device attributes */ struct device_attribute { struct attribute attr; ssize_t (*show)(struct device * dev, char * buf); ssize_t (*store)(struct device * dev, 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); /* * 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);extern struct device *device_find(const char *name, struct bus_type *bus); /* drivers/base/platform.c */ struct platform_device { char * name; u32 id; struct device dev; u32 num_resources; struct resource * resource;}; #define to_platform_device(x) container_of((x), struct platform_device, dev) extern int platform_device_register(struct platform_device *);extern void platform_device_unregister(struct platform_device *); extern struct bus_type platform_bus_type;extern struct device platform_bus; extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);extern int platform_get_irq(struct platform_device *, unsigned int);extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, char *);extern int platform_get_irq_byname(struct platform_device *, char *);extern int platform_add_devices(struct platform_device **, int); extern struct platform_device *platform_device_register_simple(char *, unsigned int, struct resource *, unsigned int); /* drivers/base/power.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. */#define dev_printk(level, dev, format, arg...) \ printk(level "%s %s: " format , (dev)->driver ? (dev)->driver->name : "" , (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) /* 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_ */
/*
* 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/config.h>
#include <linux/ioport.h>
#include <linux/kobject.h>
#include <linux/list.h>
#include <linux/spinlock.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
enum {
SUSPEND_NOTIFY,
SUSPEND_SAVE_STATE,
SUSPEND_DISABLE,
SUSPEND_POWER_DOWN,
};
enum {
RESUME_POWER_ON,
RESUME_RESTORE_STATE,
RESUME_ENABLE,
};
struct device;
struct device_driver;
struct class;
struct class_device;
struct class_simple;
struct bus_type {
char * name;
struct subsystem subsys;
struct kset drivers;
struct kset devices;
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 (*hotplug) (struct device *dev, char **envp,
int num_envp, char *buffer, int buffer_size);
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 int bus_rescan_devices(struct bus_type * bus);
extern struct bus_type * get_bus(struct bus_type * bus);
extern void put_bus(struct bus_type * bus);
extern struct bus_type * find_bus(char * name);
/* iterator helpers for buses */
int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data,
int (*fn)(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 {
char * name;
struct bus_type * bus;
struct semaphore unload_sem;
struct kobject kobj;
struct list_head devices;
struct module * owner;
int (*probe) (struct device * dev);
int (*remove) (struct device * dev);
void (*shutdown) (struct device * dev);
int (*suspend) (struct device * dev, u32 state, u32 level);
int (*resume) (struct device * dev, u32 level);
};
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 *);
/*
* device classes
*/
struct class {
char * name;
struct subsystem subsys;
struct list_head children;
struct list_head interfaces;
struct class_attribute * class_attrs;
struct class_device_attribute * class_dev_attrs;
int (*hotplug)(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 *);
extern struct class * class_get(struct class *);
extern void class_put(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 {
struct list_head node;
struct kobject kobj;
struct class * class; /* required */
struct device * dev; /* not necessary, but nice to have */
void * class_data; /* class-specific data */
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 *);
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 *);
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 *);
void (*remove) (struct class_device *);
};
extern int class_interface_register(struct class_interface *);
extern void class_interface_unregister(struct class_interface *);
/* interface for class simple stuff */
extern struct class_simple *class_simple_create(struct module *owner, char *name);
extern void class_simple_destroy(struct class_simple *cs);
extern struct class_device *class_simple_device_add(struct class_simple *cs, dev_t dev, struct device *device, const char *fmt, ...)
__attribute__((format(printf,4,5)));
extern int class_simple_set_hotplug(struct class_simple *,
int (*hotplug)(struct class_device *dev, char **envp, int num_envp, char *buffer, int buffer_size));
extern void class_simple_device_remove(dev_t dev);
struct device {
struct list_head node; /* node in sibling list */
struct list_head bus_list; /* node in bus's list */
struct list_head driver_list;
struct list_head children;
struct device * parent;
struct kobject kobj;
char bus_id[BUS_ID_SIZE]; /* position on parent bus */
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 (e.g. ACPI,
BIOS data relevant to device) */
struct dev_pm_info power;
u32 detach_state; /* State to enter when device is
detached from its driver. */
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 */
void (*release)(struct device * dev);
};
static inline struct device *
list_to_dev(struct list_head *node)
{
return list_entry(node, struct device, node);
}
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;
}
/*
* 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 int driver_probe_device(struct device_driver * drv, struct device * dev);
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);
/* driverfs interface for exporting device attributes */
struct device_attribute {
struct attribute attr;
ssize_t (*show)(struct device * dev, char * buf);
ssize_t (*store)(struct device * dev, 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);
/*
* 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);
extern struct device *device_find(const char *name, struct bus_type *bus);
/* drivers/base/platform.c */
struct platform_device {
char * name;
u32 id;
struct device dev;
u32 num_resources;
struct resource * resource;
};
#define to_platform_device(x) container_of((x), struct platform_device, dev)
extern int platform_device_register(struct platform_device *);
extern void platform_device_unregister(struct platform_device *);
extern struct bus_type platform_bus_type;
extern struct device platform_bus;
extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
extern int platform_get_irq(struct platform_device *, unsigned int);
extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, char *);
extern int platform_get_irq_byname(struct platform_device *, char *);
extern int platform_add_devices(struct platform_device **, int);
extern struct platform_device *platform_device_register_simple(char *, unsigned int, struct resource *, unsigned int);
/* drivers/base/power.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. */
#define dev_printk(level, dev, format, arg...) \
printk(level "%s %s: " format , (dev)->driver ? (dev)->driver->name : "" , (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)
/* 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_ */