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Diffstat (limited to 'include/linux/device.h')
| -rw-r--r-- | include/linux/device.h | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h new file mode 100644 index 00000000000..cf470459fa6 --- /dev/null +++ b/include/linux/device.h @@ -0,0 +1,426 @@ +/* + * 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/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 completion unloaded; + 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, pm_message_t 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 semaphore sem; /* locks both the children and interfaces lists */ + + 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 */ + dev_t devt; /* dev_t, creates the sysfs "dev" */ + 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_ */ |