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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* platform_device.h - generic, centralized driver model
*
* Copyright (c) 2001-2003 Patrick Mochel <[email protected]>
*
* See Documentation/driver-api/driver-model/ for more information.
*/
#ifndef _PLATFORM_DEVICE_H_
#define _PLATFORM_DEVICE_H_
#include <linux/device.h>
#define PLATFORM_DEVID_NONE (-1)
#define PLATFORM_DEVID_AUTO (-2)
struct irq_affinity;
struct mfd_cell;
struct property_entry;
struct platform_device_id;
struct platform_device {
const char *name;
int id;
bool id_auto;
struct device dev;
u64 platform_dma_mask;
struct device_dma_parameters dma_parms;
u32 num_resources;
struct resource *resource;
const struct platform_device_id *id_entry;
/*
* Driver name to force a match. Do not set directly, because core
* frees it. Use driver_set_override() to set or clear it.
*/
const char *driver_override;
/* 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 dev_is_platform(dev) ((dev)->bus == &platform_bus_type)
#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 struct resource *platform_get_mem_or_io(struct platform_device *,
unsigned int);
extern struct device *
platform_find_device_by_driver(struct device *start,
const struct device_driver *drv);
#ifdef CONFIG_HAS_IOMEM
extern void __iomem *
devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
unsigned int index, struct resource **res);
extern void __iomem *
devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index);
extern void __iomem *
devm_platform_ioremap_resource_byname(struct platform_device *pdev,
const char *name);
#else
static inline void __iomem *
devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
unsigned int index, struct resource **res)
{
return ERR_PTR(-EINVAL);
}
static inline void __iomem *
devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index)
{
return ERR_PTR(-EINVAL);
}
static inline void __iomem *
devm_platform_ioremap_resource_byname(struct platform_device *pdev,
const char *name)
{
return ERR_PTR(-EINVAL);
}
#endif
extern int platform_get_irq(struct platform_device *, unsigned int);
extern int platform_get_irq_optional(struct platform_device *, unsigned int);
extern int platform_irq_count(struct platform_device *);
extern int devm_platform_get_irqs_affinity(struct platform_device *dev,
struct irq_affinity *affd,
unsigned int minvec,
unsigned int maxvec,
int **irqs);
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_get_irq_byname_optional(struct platform_device *dev,
const char *name);
extern int platform_add_devices(struct platform_device **, int);
struct platform_device_info {
struct device *parent;
struct fwnode_handle *fwnode;
bool of_node_reused;
const char *name;
int id;
const struct resource *res;
unsigned int num_res;
const void *data;
size_t size_data;
u64 dma_mask;
const struct property_entry *properties;
};
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 *);
/*
* Traditionally the remove callback returned an int which however is
* ignored by the driver core. This led to wrong expectations by driver
* authors who thought returning an error code was a valid error
* handling strategy. To convert to a callback returning void, new
* drivers should implement .remove_new() until the conversion it done
* that eventually makes .remove() return void.
*/
int (*remove)(struct platform_device *);
void (*remove_new)(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;
/*
* For most device drivers, no need to care about this flag as long as
* all DMAs are handled through the kernel DMA API. For some special
* ones, for example VFIO drivers, they know how to manage the DMA
* themselves and set this flag so that the IOMMU layer will allow them
* to setup and manage their own I/O address space.
*/
bool driver_managed_dma;
};
#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.
*/
#define platform_driver_probe(drv, probe) \
__platform_driver_probe(drv, probe, THIS_MODULE)
extern int __platform_driver_probe(struct platform_driver *driver,
int (*probe)(struct platform_device *), struct module *module);
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)
/* builtin_platform_driver() - Helper macro for builtin drivers that
* don't do anything special in driver init. This eliminates some
* boilerplate. Each driver may only use this macro once, and
* calling it replaces device_initcall(). Note this is meant to be
* a parallel of module_platform_driver() above, but w/o _exit stuff.
*/
#define builtin_platform_driver(__platform_driver) \
builtin_driver(__platform_driver, platform_driver_register)
/* 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);
/* builtin_platform_driver_probe() - Helper macro for drivers that don't do
* anything special in device init. This eliminates some boilerplate. Each
* driver may only use this macro once, and using it replaces device_initcall.
* This is meant to be a parallel of module_platform_driver_probe above, but
* without the __exit parts.
*/
#define builtin_platform_driver_probe(__platform_driver, __platform_probe) \
static int __init __platform_driver##_init(void) \
{ \
return platform_driver_probe(&(__platform_driver), \
__platform_probe); \
} \
device_initcall(__platform_driver##_init); \
#define platform_create_bundle(driver, probe, res, n_res, data, size) \
__platform_create_bundle(driver, probe, res, n_res, data, size, THIS_MODULE)
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, struct module *module);
int __platform_register_drivers(struct platform_driver * const *drivers,
unsigned int count, struct module *owner);
void platform_unregister_drivers(struct platform_driver * const *drivers,
unsigned int count);
#define platform_register_drivers(drivers, count) \
__platform_register_drivers(drivers, count, THIS_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
#ifndef CONFIG_SUPERH
/*
* REVISIT: This stub is needed for all non-SuperH users of early platform
* drivers. It should go away once we introduce the new platform_device-based
* early driver framework.
*/
static inline int is_sh_early_platform_device(struct platform_device *pdev)
{
return 0;
}
#endif /* CONFIG_SUPERH */
/* For now only SuperH uses it */
void early_platform_cleanup(void);
#endif /* _PLATFORM_DEVICE_H_ */
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