include/linux/platform_device.h

   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         /* arch specific additions */
  27         struct pdev_archdata    archdata;
  28 };
  29
  30 #define platform_get_device_id(pdev)    ((pdev)->id_entry)
  31
  32 #define to_platform_device(x) container_of((x), struct platform_device, dev)
  33
  34 extern int platform_device_register(struct platform_device *);
  35 extern void platform_device_unregister(struct platform_device *);
  36
  37 extern struct bus_type platform_bus_type;
  38 extern struct device platform_bus;
  39
  40 extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
  41 extern int platform_get_irq(struct platform_device *, unsigned int);
  42 extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, const char *);
  43 extern int platform_get_irq_byname(struct platform_device *, const char *);
  44 extern int platform_add_devices(struct platform_device **, int);
  45
  46 extern struct platform_device *platform_device_register_simple(const char *, int id,
  47                                         struct resource *, unsigned int);
  48 extern struct platform_device *platform_device_register_data(struct device *,
  49                 const char *, int, const void *, size_t);
  50
  51 extern struct platform_device *platform_device_alloc(const char *name, int id);
  52 extern int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num);
  53 extern int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size);
  54 extern int platform_device_add(struct platform_device *pdev);
  55 extern void platform_device_del(struct platform_device *pdev);
  56 extern void platform_device_put(struct platform_device *pdev);
  57
  58 struct platform_driver {
  59         int (*probe)(struct platform_device *);
  60         int (*remove)(struct platform_device *);
  61         void (*shutdown)(struct platform_device *);
  62         int (*suspend)(struct platform_device *, pm_message_t state);
  63         int (*resume)(struct platform_device *);
  64         struct device_driver driver;
  65         struct platform_device_id *id_table;
  66 };
  67
  68 extern int platform_driver_register(struct platform_driver *);
  69 extern void platform_driver_unregister(struct platform_driver *);
  70
  71 /* non-hotpluggable platform devices may use this so that probe() and
  72  * its support may live in __init sections, conserving runtime memory.
  73  */
  74 extern int platform_driver_probe(struct platform_driver *driver,
  75                 int (*probe)(struct platform_device *));
  76
  77 #define platform_get_drvdata(_dev)      dev_get_drvdata(&(_dev)->dev)
  78 #define platform_set_drvdata(_dev,data) dev_set_drvdata(&(_dev)->dev, (data))
  79
  80 /* early platform driver interface */
  81 struct early_platform_driver {
  82         const char *class_str;
  83         struct platform_driver *pdrv;
  84         struct list_head list;
  85         int requested_id;
  86         char *buffer;
  87         int bufsize;
  88 };
  89
  90 #define EARLY_PLATFORM_ID_UNSET -2
  91 #define EARLY_PLATFORM_ID_ERROR -3
  92
  93 extern int early_platform_driver_register(struct early_platform_driver *epdrv,
  94                                           char *buf);
  95 extern void early_platform_add_devices(struct platform_device **devs, int num);
  96
  97 static inline int is_early_platform_device(struct platform_device *pdev)
  98 {
  99         return !pdev->dev.driver;
 100 }
 101
 102 extern void early_platform_driver_register_all(char *class_str);
 103 extern int early_platform_driver_probe(char *class_str,
 104                                        int nr_probe, int user_only);
 105 extern void early_platform_cleanup(void);
 106
 107 #define early_platform_init(class_string, platdrv)              \
 108         early_platform_init_buffer(class_string, platdrv, NULL, 0)
 109
 110 #ifndef MODULE
 111 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz)  \
 112 static __initdata struct early_platform_driver early_driver = {         \
 113         .class_str = class_string,                                      \
 114         .buffer = buf,                                                  \
 115         .bufsize = bufsiz,                                              \
 116         .pdrv = platdrv,                                                \
 117         .requested_id = EARLY_PLATFORM_ID_UNSET,                        \
 118 };                                                                      \
 119 static int __init early_platform_driver_setup_func(char *buffer)        \
 120 {                                                                       \
 121         return early_platform_driver_register(&early_driver, buffer);   \
 122 }                                                                       \
 123 early_param(class_string, early_platform_driver_setup_func)
 124 #else /* MODULE */
 125 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz)  \
 126 static inline char *early_platform_driver_setup_func(void)              \
 127 {                                                                       \
 128         return bufsiz ? buf : NULL;                                     \
 129 }
 130 #endif /* MODULE */
 131
 132 #endif /* _PLATFORM_DEVICE_H_ */