root/include/linux/platform_device.h

INCLUDED FROM

DEFINITIONS

1. platform_device_register_resndata
2. platform_device_register_simple
3. platform_device_register_data
4. platform_get_drvdata
5. platform_set_drvdata
6. is_early_platform_device

/*
 * 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>

#define PLATFORM_DEVID_NONE     (-1)
#define PLATFORM_DEVID_AUTO     (-2)

struct mfd_cell;

struct platform_device {
        const char      *name;
        int             id;
        bool            id_auto;
        struct device   dev;
        u32             num_resources;
        struct resource *resource;

        const struct platform_device_id *id_entry;
        char *driver_override; /* Driver name to force a match */

        /* MFD cell pointer */
        struct mfd_cell *mfd_cell;

        /* 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 void arch_setup_pdev_archdata(struct platform_device *);
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);

struct platform_device_info {
                struct device *parent;
                struct acpi_dev_node acpi_node;

                const char *name;
                int id;

                const struct resource *res;
                unsigned int num_res;

                const void *data;
                size_t size_data;
                u64 dma_mask;
};
extern struct platform_device *platform_device_register_full(
                const struct platform_device_info *pdevinfo);

/**
 * platform_device_register_resndata - add a platform-level device with
 * resources and platform-specific data
 *
 * @parent: parent device for the device we're adding
 * @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
 * @data: platform specific data for this platform device
 * @size: size of platform specific data
 *
 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
 */
static inline 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) {

        struct platform_device_info pdevinfo = {
                .parent = parent,
                .name = name,
                .id = id,
                .res = res,
                .num_res = num,
                .data = data,
                .size_data = size,
                .dma_mask = 0,
        };

        return platform_device_register_full(&pdevinfo);
}

/**
 * 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;
        bool prevent_deferred_probe;
};

#define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
                                 driver))

/*
 * use a macro to avoid include chaining to get THIS_MODULE
 */
#define platform_driver_register(drv) \
        __platform_driver_register(drv, THIS_MODULE)
extern int __platform_driver_register(struct platform_driver *,
                                        struct module *);
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 *));

static inline void *platform_get_drvdata(const struct platform_device *pdev)
{
        return dev_get_drvdata(&pdev->dev);
}

static inline void platform_set_drvdata(struct platform_device *pdev,
                                        void *data)
{
        dev_set_drvdata(&pdev->dev, data);
}

/* module_platform_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()
 */
#define module_platform_driver(__platform_driver) \
        module_driver(__platform_driver, platform_driver_register, \
                        platform_driver_unregister)

/* module_platform_driver_probe() - 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()
 */
#define module_platform_driver_probe(__platform_driver, __platform_probe) \
static int __init __platform_driver##_init(void) \
{ \
        return platform_driver_probe(&(__platform_driver), \
                                     __platform_probe);    \
} \
module_init(__platform_driver##_init); \
static void __exit __platform_driver##_exit(void) \
{ \
        platform_driver_unregister(&(__platform_driver)); \
} \
module_exit(__platform_driver##_exit);

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 */

#ifdef CONFIG_SUSPEND
extern int platform_pm_suspend(struct device *dev);
extern int platform_pm_resume(struct device *dev);
#else
#define platform_pm_suspend             NULL
#define platform_pm_resume              NULL
#endif

#ifdef CONFIG_HIBERNATE_CALLBACKS
extern int platform_pm_freeze(struct device *dev);
extern int platform_pm_thaw(struct device *dev);
extern int platform_pm_poweroff(struct device *dev);
extern int platform_pm_restore(struct device *dev);
#else
#define platform_pm_freeze              NULL
#define platform_pm_thaw                NULL
#define platform_pm_poweroff            NULL
#define platform_pm_restore             NULL
#endif

#ifdef CONFIG_PM_SLEEP
#define USE_PLATFORM_PM_SLEEP_OPS \
        .suspend = platform_pm_suspend, \
        .resume = platform_pm_resume, \
        .freeze = platform_pm_freeze, \
        .thaw = platform_pm_thaw, \
        .poweroff = platform_pm_poweroff, \
        .restore = platform_pm_restore,
#else
#define USE_PLATFORM_PM_SLEEP_OPS
#endif

#endif /* _PLATFORM_DEVICE_H_ */