/*
   * platform_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 _PLATFORM_DEVICE_H_
  #define _PLATFORM_DEVICE_H_
  
  #include <linux/device.h>

  #include <linux/mod_devicetable.h>

  
  struct platform_device {
  	const char	* name;

  	int		id;

  	struct device	dev;
  	u32		num_resources;
  	struct resource	* resource;

  	const struct platform_device_id	*id_entry;

  
  	/* arch specific additions */
  	struct pdev_archdata	archdata;

  };

  #define platform_get_device_id(pdev)	((pdev)->id_entry)

  #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, const char *);
  extern int platform_get_irq_byname(struct platform_device *, const char *);

  extern int platform_add_devices(struct platform_device **, int);

  extern struct platform_device *platform_device_register_resndata(
  		struct device *parent, const char *name, int id,
  		const struct resource *res, unsigned int num,
  		const void *data, size_t size);
  
  /**
   * platform_device_register_simple - add a platform-level device and its resources
   * @name: base name of the device we're adding
   * @id: instance id
   * @res: set of resources that needs to be allocated for the device
   * @num: number of resources
   *
   * This function creates a simple platform device that requires minimal
   * resource and memory management. Canned release function freeing memory
   * allocated for the device allows drivers using such devices to be
   * unloaded without waiting for the last reference to the device to be
   * dropped.
   *
   * This interface is primarily intended for use with legacy drivers which
   * probe hardware directly.  Because such drivers create sysfs device nodes
   * themselves, rather than letting system infrastructure handle such device
   * enumeration tasks, they don't fully conform to the Linux driver model.
   * In particular, when such drivers are built as modules, they can't be
   * "hotplugged".
   *
   * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
   */
  static inline struct platform_device *platform_device_register_simple(
  		const char *name, int id,
  		const struct resource *res, unsigned int num)
  {
  	return platform_device_register_resndata(NULL, name, id,
  			res, num, NULL, 0);
  }
  
  /**
   * platform_device_register_data - add a platform-level device with platform-specific data
   * @parent: parent device for the device we're adding
   * @name: base name of the device we're adding
   * @id: instance id
   * @data: platform specific data for this platform device
   * @size: size of platform specific data
   *
   * This function creates a simple platform device that requires minimal
   * resource and memory management. Canned release function freeing memory
   * allocated for the device allows drivers using such devices to be
   * unloaded without waiting for the last reference to the device to be
   * dropped.
   *
   * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
   */
  static inline struct platform_device *platform_device_register_data(
  		struct device *parent, const char *name, int id,
  		const void *data, size_t size)
  {
  	return platform_device_register_resndata(parent, name, id,
  			NULL, 0, data, size);
  }

  extern struct platform_device *platform_device_alloc(const char *name, int id);

  extern int platform_device_add_resources(struct platform_device *pdev,
  					 const struct resource *res,
  					 unsigned int num);

  extern int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size);

  extern int platform_device_add(struct platform_device *pdev);

  extern void platform_device_del(struct platform_device *pdev);

  extern void platform_device_put(struct platform_device *pdev);

  struct platform_driver {
  	int (*probe)(struct platform_device *);
  	int (*remove)(struct platform_device *);
  	void (*shutdown)(struct platform_device *);
  	int (*suspend)(struct platform_device *, pm_message_t state);
  	int (*resume)(struct platform_device *);
  	struct device_driver driver;

  	const struct platform_device_id *id_table;

  };
  
  extern int platform_driver_register(struct platform_driver *);
  extern void platform_driver_unregister(struct platform_driver *);

  /* non-hotpluggable platform devices may use this so that probe() and
   * its support may live in __init sections, conserving runtime memory.
   */
  extern int platform_driver_probe(struct platform_driver *driver,
  		int (*probe)(struct platform_device *));

  #define platform_get_drvdata(_dev)	dev_get_drvdata(&(_dev)->dev)
  #define platform_set_drvdata(_dev,data)	dev_set_drvdata(&(_dev)->dev, (data))

  extern struct platform_device *platform_create_bundle(struct platform_driver *driver,
  					int (*probe)(struct platform_device *),
  					struct resource *res, unsigned int n_res,
  					const void *data, size_t size);

  /* early platform driver interface */
  struct early_platform_driver {
  	const char *class_str;
  	struct platform_driver *pdrv;
  	struct list_head list;
  	int requested_id;

  	char *buffer;
  	int bufsize;

  };
  
  #define EARLY_PLATFORM_ID_UNSET -2
  #define EARLY_PLATFORM_ID_ERROR -3
  
  extern int early_platform_driver_register(struct early_platform_driver *epdrv,
  					  char *buf);
  extern void early_platform_add_devices(struct platform_device **devs, int num);
  
  static inline int is_early_platform_device(struct platform_device *pdev)
  {
  	return !pdev->dev.driver;
  }
  
  extern void early_platform_driver_register_all(char *class_str);
  extern int early_platform_driver_probe(char *class_str,
  				       int nr_probe, int user_only);
  extern void early_platform_cleanup(void);

  #define early_platform_init(class_string, platdrv)		\
  	early_platform_init_buffer(class_string, platdrv, NULL, 0)

  
  #ifndef MODULE

  #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz)	\

  static __initdata struct early_platform_driver early_driver = {		\
  	.class_str = class_string,					\

  	.buffer = buf,							\
  	.bufsize = bufsiz,						\
  	.pdrv = platdrv,						\

  	.requested_id = EARLY_PLATFORM_ID_UNSET,			\
  };									\

  static int __init early_platform_driver_setup_func(char *buffer)	\

  {									\

  	return early_platform_driver_register(&early_driver, buffer);	\

  }									\
  early_param(class_string, early_platform_driver_setup_func)
  #else /* MODULE */

  #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz)	\
  static inline char *early_platform_driver_setup_func(void)		\
  {									\
  	return bufsiz ? buf : NULL;					\
  }

  #endif /* MODULE */

  #endif /* _PLATFORM_DEVICE_H_ */