#include <linux/overflow.h>
#include <linux/device/bus.h>
#include <linux/device/class.h>
+#include <linux/device/driver.h>
#include <asm/device.h>
struct device;
struct dev_pin_info;
struct iommu_param;
-/**
- * enum probe_type - device driver probe type to try
- * Device drivers may opt in for special handling of their
- * respective probe routines. This tells the core what to
- * expect and prefer.
- *
- * @PROBE_DEFAULT_STRATEGY: Used by drivers that work equally well
- * whether probed synchronously or asynchronously.
- * @PROBE_PREFER_ASYNCHRONOUS: Drivers for "slow" devices which
- * probing order is not essential for booting the system may
- * opt into executing their probes asynchronously.
- * @PROBE_FORCE_SYNCHRONOUS: Use this to annotate drivers that need
- * their probe routines to run synchronously with driver and
- * device registration (with the exception of -EPROBE_DEFER
- * handling - re-probing always ends up being done asynchronously).
- *
- * Note that the end goal is to switch the kernel to use asynchronous
- * probing by default, so annotating drivers with
- * %PROBE_PREFER_ASYNCHRONOUS is a temporary measure that allows us
- * to speed up boot process while we are validating the rest of the
- * drivers.
- */
-enum probe_type {
- PROBE_DEFAULT_STRATEGY,
- PROBE_PREFER_ASYNCHRONOUS,
- PROBE_FORCE_SYNCHRONOUS,
-};
-
-/**
- * struct device_driver - The basic device driver structure
- * @name: Name of the device driver.
- * @bus: The bus which the device of this driver belongs to.
- * @owner: The module owner.
- * @mod_name: Used for built-in modules.
- * @suppress_bind_attrs: Disables bind/unbind via sysfs.
- * @probe_type: Type of the probe (synchronous or asynchronous) to use.
- * @of_match_table: The open firmware table.
- * @acpi_match_table: The ACPI match table.
- * @probe: Called to query the existence of a specific device,
- * whether this driver can work with it, and bind the driver
- * to a specific device.
- * @sync_state: Called to sync device state to software state after all the
- * state tracking consumers linked to this device (present at
- * the time of late_initcall) have successfully bound to a
- * driver. If the device has no consumers, this function will
- * be called at late_initcall_sync level. If the device has
- * consumers that are never bound to a driver, this function
- * will never get called until they do.
- * @remove: Called when the device is removed from the system to
- * unbind a device from this driver.
- * @shutdown: Called at shut-down time to quiesce the device.
- * @suspend: Called to put the device to sleep mode. Usually to a
- * low power state.
- * @resume: Called to bring a device from sleep mode.
- * @groups: Default attributes that get created by the driver core
- * automatically.
- * @dev_groups: Additional attributes attached to device instance once the
- * it is bound to the driver.
- * @pm: Power management operations of the device which matched
- * this driver.
- * @coredump: Called when sysfs entry is written to. The device driver
- * is expected to call the dev_coredump API resulting in a
- * uevent.
- * @p: Driver core's private data, no one other than the driver
- * core can touch this.
- *
- * The device driver-model tracks all of the drivers known to the system.
- * The main reason for this tracking is to enable the driver core to match
- * up drivers with new devices. Once drivers are known objects within the
- * system, however, a number of other things become possible. Device drivers
- * can export information and configuration variables that are independent
- * of any specific device.
- */
-struct device_driver {
- const char *name;
- struct bus_type *bus;
-
- struct module *owner;
- const char *mod_name; /* used for built-in modules */
-
- bool suppress_bind_attrs; /* disables bind/unbind via sysfs */
- enum probe_type probe_type;
-
- const struct of_device_id *of_match_table;
- const struct acpi_device_id *acpi_match_table;
-
- int (*probe) (struct device *dev);
- void (*sync_state)(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);
- const struct attribute_group **groups;
- const struct attribute_group **dev_groups;
-
- const struct dev_pm_ops *pm;
- void (*coredump) (struct device *dev);
-
- struct driver_private *p;
-};
-
-
-extern int __must_check driver_register(struct device_driver *drv);
-extern void driver_unregister(struct device_driver *drv);
-
-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 */
-
-struct driver_attribute {
- struct attribute attr;
- ssize_t (*show)(struct device_driver *driver, char *buf);
- ssize_t (*store)(struct device_driver *driver, const char *buf,
- size_t count);
-};
-
-#define DRIVER_ATTR_RW(_name) \
- struct driver_attribute driver_attr_##_name = __ATTR_RW(_name)
-#define DRIVER_ATTR_RO(_name) \
- struct driver_attribute driver_attr_##_name = __ATTR_RO(_name)
-#define DRIVER_ATTR_WO(_name) \
- struct driver_attribute driver_attr_##_name = __ATTR_WO(_name)
-
-extern int __must_check driver_create_file(struct device_driver *driver,
- const struct driver_attribute *attr);
-extern void driver_remove_file(struct device_driver *driver,
- const struct driver_attribute *attr);
-
-extern int __must_check driver_for_each_device(struct device_driver *drv,
- struct device *start,
- void *data,
- int (*fn)(struct device *dev,
- void *));
-struct device *driver_find_device(struct device_driver *drv,
- struct device *start, const void *data,
- int (*match)(struct device *dev, const void *data));
-
-/**
- * driver_find_device_by_name - device iterator for locating a particular device
- * of a specific name.
- * @drv: the driver we're iterating
- * @name: name of the device to match
- */
-static inline struct device *driver_find_device_by_name(struct device_driver *drv,
- const char *name)
-{
- return driver_find_device(drv, NULL, name, device_match_name);
-}
-
-/**
- * driver_find_device_by_of_node- device iterator for locating a particular device
- * by of_node pointer.
- * @drv: the driver we're iterating
- * @np: of_node pointer to match.
- */
-static inline struct device *
-driver_find_device_by_of_node(struct device_driver *drv,
- const struct device_node *np)
-{
- return driver_find_device(drv, NULL, np, device_match_of_node);
-}
-
-/**
- * driver_find_device_by_fwnode- device iterator for locating a particular device
- * by fwnode pointer.
- * @drv: the driver we're iterating
- * @fwnode: fwnode pointer to match.
- */
-static inline struct device *
-driver_find_device_by_fwnode(struct device_driver *drv,
- const struct fwnode_handle *fwnode)
-{
- return driver_find_device(drv, NULL, fwnode, device_match_fwnode);
-}
-
-/**
- * driver_find_device_by_devt- device iterator for locating a particular device
- * by devt.
- * @drv: the driver we're iterating
- * @devt: devt pointer to match.
- */
-static inline struct device *driver_find_device_by_devt(struct device_driver *drv,
- dev_t devt)
-{
- return driver_find_device(drv, NULL, &devt, device_match_devt);
-}
-
-static inline struct device *driver_find_next_device(struct device_driver *drv,
- struct device *start)
-{
- return driver_find_device(drv, start, NULL, device_match_any);
-}
-
-#ifdef CONFIG_ACPI
-/**
- * driver_find_device_by_acpi_dev : device iterator for locating a particular
- * device matching the ACPI_COMPANION device.
- * @drv: the driver we're iterating
- * @adev: ACPI_COMPANION device to match.
- */
-static inline struct device *
-driver_find_device_by_acpi_dev(struct device_driver *drv,
- const struct acpi_device *adev)
-{
- return driver_find_device(drv, NULL, adev, device_match_acpi_dev);
-}
-#else
-static inline struct device *
-driver_find_device_by_acpi_dev(struct device_driver *drv, const void *adev)
-{
- return NULL;
-}
-#endif
-
-void driver_deferred_probe_add(struct device *dev);
-int driver_deferred_probe_check_state(struct device *dev);
-int driver_deferred_probe_check_state_continue(struct device *dev);
-
/**
* struct subsys_interface - interfaces to device functions
* @name: name of the device function
return dev->of_node;
}
-void driver_init(void);
-
/*
* High level routines for use by the bus drivers
*/
#define sysfs_deprecated 0
#endif
-/**
- * module_driver() - Helper macro for drivers that don't do anything
- * special in module init/exit. This eliminates a lot of boilerplate.
- * Each module may only use this macro once, and calling it replaces
- * module_init() and module_exit().
- *
- * @__driver: driver name
- * @__register: register function for this driver type
- * @__unregister: unregister function for this driver type
- * @...: Additional arguments to be passed to __register and __unregister.
- *
- * Use this macro to construct bus specific macros for registering
- * drivers, and do not use it on its own.
- */
-#define module_driver(__driver, __register, __unregister, ...) \
-static int __init __driver##_init(void) \
-{ \
- return __register(&(__driver) , ##__VA_ARGS__); \
-} \
-module_init(__driver##_init); \
-static void __exit __driver##_exit(void) \
-{ \
- __unregister(&(__driver) , ##__VA_ARGS__); \
-} \
-module_exit(__driver##_exit);
-
-/**
- * builtin_driver() - Helper macro for drivers that don't do anything
- * special in init and have no exit. This eliminates some boilerplate.
- * Each driver may only use this macro once, and calling it replaces
- * device_initcall (or in some cases, the legacy __initcall). This is
- * meant to be a direct parallel of module_driver() above but without
- * the __exit stuff that is not used for builtin cases.
- *
- * @__driver: driver name
- * @__register: register function for this driver type
- * @...: Additional arguments to be passed to __register
- *
- * Use this macro to construct bus specific macros for registering
- * drivers, and do not use it on its own.
- */
-#define builtin_driver(__driver, __register, ...) \
-static int __init __driver##_init(void) \
-{ \
- return __register(&(__driver) , ##__VA_ARGS__); \
-} \
-device_initcall(__driver##_init);
-
#endif /* _DEVICE_H_ */
git.samba.org / sfrench / cifs-2.6.git / blobdiff