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   1 /*
   2  * platform_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 _PLATFORM_DEVICE_H_
  12 #define _PLATFORM_DEVICE_H_
  13
  14 #include <linux/device.h>
  15 #include <linux/mod_devicetable.h>
  16
  17 struct platform_device {
  18         const char      * name;
  19         int             id;
  20         struct device   dev;
  21         u32             num_resources;
  22         struct resource * resource;
  23
  24         struct platform_device_id       *id_entry;
  25 };
  26
  27 #define platform_get_device_id(pdev)    ((pdev)->id_entry)
  28
  29 #define to_platform_device(x) container_of((x), struct platform_device, dev)
  30
  31 extern int platform_device_register(struct platform_device *);
  32 extern void platform_device_unregister(struct platform_device *);
  33
  34 extern struct bus_type platform_bus_type;
  35 extern struct device platform_bus;
  36
  37 extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
  38 extern int platform_get_irq(struct platform_device *, unsigned int);
  39 extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, const char *);
  40 extern int platform_get_irq_byname(struct platform_device *, const char *);
  41 extern int platform_add_devices(struct platform_device **, int);
  42
  43 extern struct platform_device *platform_device_register_simple(const char *, int id,
  44                                         struct resource *, unsigned int);
  45 extern struct platform_device *platform_device_register_data(struct device *,
  46                 const char *, int, const void *, size_t);
  47
  48 extern struct platform_device *platform_device_alloc(const char *name, int id);
  49 extern int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num);
  50 extern int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size);
  51 extern int platform_device_add(struct platform_device *pdev);
  52 extern void platform_device_del(struct platform_device *pdev);
  53 extern void platform_device_put(struct platform_device *pdev);
  54
  55 struct platform_driver {
  56         int (*probe)(struct platform_device *);
  57         int (*remove)(struct platform_device *);
  58         void (*shutdown)(struct platform_device *);
  59         int (*suspend)(struct platform_device *, pm_message_t state);
  60         int (*suspend_late)(struct platform_device *, pm_message_t state);
  61         int (*resume_early)(struct platform_device *);
  62         int (*resume)(struct platform_device *);
  63         struct device_driver driver;
  64         struct platform_device_id *id_table;
  65 };
  66
  67 extern int platform_driver_register(struct platform_driver *);
  68 extern void platform_driver_unregister(struct platform_driver *);
  69
  70 /* non-hotpluggable platform devices may use this so that probe() and
  71  * its support may live in __init sections, conserving runtime memory.
  72  */
  73 extern int platform_driver_probe(struct platform_driver *driver,
  74                 int (*probe)(struct platform_device *));
  75
  76 #define platform_get_drvdata(_dev)      dev_get_drvdata(&(_dev)->dev)
  77 #define platform_set_drvdata(_dev,data) dev_set_drvdata(&(_dev)->dev, (data))
  78
  79 /* early platform driver interface */
  80 struct early_platform_driver {
  81         const char *class_str;
  82         struct platform_driver *pdrv;
  83         struct list_head list;
  84         int requested_id;
  85 };
  86
  87 #define EARLY_PLATFORM_ID_UNSET -2
  88 #define EARLY_PLATFORM_ID_ERROR -3
  89
  90 extern int early_platform_driver_register(struct early_platform_driver *epdrv,
  91                                           char *buf);
  92 extern void early_platform_add_devices(struct platform_device **devs, int num);
  93
  94 static inline int is_early_platform_device(struct platform_device *pdev)
  95 {
  96         return !pdev->dev.driver;
  97 }
  98
  99 extern void early_platform_driver_register_all(char *class_str);
 100 extern int early_platform_driver_probe(char *class_str,
 101                                        int nr_probe, int user_only);
 102 extern void early_platform_cleanup(void);
 103
 104
 105 #ifndef MODULE
 106 #define early_platform_init(class_string, platform_driver)              \
 107 static __initdata struct early_platform_driver early_driver = {         \
 108         .class_str = class_string,                                      \
 109         .pdrv = platform_driver,                                        \
 110         .requested_id = EARLY_PLATFORM_ID_UNSET,                        \
 111 };                                                                      \
 112 static int __init early_platform_driver_setup_func(char *buf)           \
 113 {                                                                       \
 114         return early_platform_driver_register(&early_driver, buf);      \
 115 }                                                                       \
 116 early_param(class_string, early_platform_driver_setup_func)
 117 #else /* MODULE */
 118 #define early_platform_init(class_string, platform_driver)
 119 #endif /* MODULE */
 120
 121 #endif /* _PLATFORM_DEVICE_H_ */