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linux
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
17struct 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
34extern int platform_device_register(struct platform_device *);
35extern void platform_device_unregister(struct platform_device *);
36
37extern struct bus_type platform_bus_type;
38extern struct device platform_bus;
39
40extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
41extern int platform_get_irq(struct platform_device *, unsigned int);
42extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, const char *);
43extern int platform_get_irq_byname(struct platform_device *, const char *);
44extern int platform_add_devices(struct platform_device **, int);
45
46extern struct platform_device *platform_device_register_simple(const char *, int id,
47 struct resource *, unsigned int);
48extern struct platform_device *platform_device_register_data(struct device *,
49 const char *, int, const void *, size_t);
50
51extern struct platform_device *platform_device_alloc(const char *name, int id);
52extern int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num);
53extern int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size);
54extern int platform_device_add(struct platform_device *pdev);
55extern void platform_device_del(struct platform_device *pdev);
56extern void platform_device_put(struct platform_device *pdev);
57
58struct 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
68extern int platform_driver_register(struct platform_driver *);
69extern 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 */
74extern 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 */
81struct 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
93extern int early_platform_driver_register(struct early_platform_driver *epdrv,
94 char *buf);
95extern void early_platform_add_devices(struct platform_device **devs, int num);
96
97static inline int is_early_platform_device(struct platform_device *pdev)
98{
99 return !pdev->dev.driver;
100}
101
102extern void early_platform_driver_register_all(char *class_str);
103extern int early_platform_driver_probe(char *class_str,
104 int nr_probe, int user_only);
105extern 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) \
112static __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}; \
119static int __init early_platform_driver_setup_func(char *buffer) \
120{ \
121 return early_platform_driver_register(&early_driver, buffer); \
122} \
123early_param(class_string, early_platform_driver_setup_func)
124#else /* MODULE */
125#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
126static inline char *early_platform_driver_setup_func(void) \
127{ \
128 return bufsiz ? buf : NULL; \
129}
130#endif /* MODULE */
131
132#endif /* _PLATFORM_DEVICE_H_ */