c60e0504c8
Add early_platform_init_buffer() support and update the early platform driver code to allow passing parameters to the driver on the kernel command line. early_platform_init_buffer() simply allows early platform drivers to provide a pointer and length to a memory area where the remaining part of the kernel command line option will be stored. Needed to pass baud rate and other serial port options to the reworked early serial console code on SuperH. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
133 lines
4.5 KiB
C
133 lines
4.5 KiB
C
/*
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* platform_device.h - generic, centralized driver model
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*
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* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
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*
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* This file is released under the GPLv2
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*
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* See Documentation/driver-model/ for more information.
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*/
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#ifndef _PLATFORM_DEVICE_H_
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#define _PLATFORM_DEVICE_H_
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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struct platform_device {
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const char * name;
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int id;
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struct device dev;
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u32 num_resources;
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struct resource * resource;
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struct platform_device_id *id_entry;
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/* arch specific additions */
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struct pdev_archdata archdata;
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};
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#define platform_get_device_id(pdev) ((pdev)->id_entry)
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#define to_platform_device(x) container_of((x), struct platform_device, dev)
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extern int platform_device_register(struct platform_device *);
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extern void platform_device_unregister(struct platform_device *);
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extern struct bus_type platform_bus_type;
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extern struct device platform_bus;
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extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
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extern int platform_get_irq(struct platform_device *, unsigned int);
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extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, const char *);
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extern int platform_get_irq_byname(struct platform_device *, const char *);
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extern int platform_add_devices(struct platform_device **, int);
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extern struct platform_device *platform_device_register_simple(const char *, int id,
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struct resource *, unsigned int);
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extern struct platform_device *platform_device_register_data(struct device *,
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const char *, int, const void *, size_t);
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extern struct platform_device *platform_device_alloc(const char *name, int id);
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extern int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num);
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extern int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size);
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extern int platform_device_add(struct platform_device *pdev);
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extern void platform_device_del(struct platform_device *pdev);
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extern void platform_device_put(struct platform_device *pdev);
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struct platform_driver {
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int (*probe)(struct platform_device *);
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int (*remove)(struct platform_device *);
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void (*shutdown)(struct platform_device *);
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int (*suspend)(struct platform_device *, pm_message_t state);
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int (*resume)(struct platform_device *);
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struct device_driver driver;
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struct platform_device_id *id_table;
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};
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extern int platform_driver_register(struct platform_driver *);
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extern void platform_driver_unregister(struct platform_driver *);
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/* non-hotpluggable platform devices may use this so that probe() and
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* its support may live in __init sections, conserving runtime memory.
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*/
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extern int platform_driver_probe(struct platform_driver *driver,
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int (*probe)(struct platform_device *));
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#define platform_get_drvdata(_dev) dev_get_drvdata(&(_dev)->dev)
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#define platform_set_drvdata(_dev,data) dev_set_drvdata(&(_dev)->dev, (data))
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/* early platform driver interface */
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struct early_platform_driver {
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const char *class_str;
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struct platform_driver *pdrv;
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struct list_head list;
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int requested_id;
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char *buffer;
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int bufsize;
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};
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#define EARLY_PLATFORM_ID_UNSET -2
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#define EARLY_PLATFORM_ID_ERROR -3
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extern int early_platform_driver_register(struct early_platform_driver *epdrv,
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char *buf);
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extern void early_platform_add_devices(struct platform_device **devs, int num);
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static inline int is_early_platform_device(struct platform_device *pdev)
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{
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return !pdev->dev.driver;
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}
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extern void early_platform_driver_register_all(char *class_str);
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extern int early_platform_driver_probe(char *class_str,
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int nr_probe, int user_only);
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extern void early_platform_cleanup(void);
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#define early_platform_init(class_string, platdrv) \
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early_platform_init_buffer(class_string, platdrv, NULL, 0)
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#ifndef MODULE
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#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
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static __initdata struct early_platform_driver early_driver = { \
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.class_str = class_string, \
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.buffer = buf, \
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.bufsize = bufsiz, \
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.pdrv = platdrv, \
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.requested_id = EARLY_PLATFORM_ID_UNSET, \
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}; \
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static int __init early_platform_driver_setup_func(char *buffer) \
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{ \
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return early_platform_driver_register(&early_driver, buffer); \
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} \
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early_param(class_string, early_platform_driver_setup_func)
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#else /* MODULE */
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#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
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static inline char *early_platform_driver_setup_func(void) \
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{ \
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return bufsiz ? buf : NULL; \
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}
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#endif /* MODULE */
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#endif /* _PLATFORM_DEVICE_H_ */
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