94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
/*
|
|
* include/linux/uio_driver.h
|
|
*
|
|
* Copyright(C) 2005, Benedikt Spranger <b.spranger@linutronix.de>
|
|
* Copyright(C) 2005, Thomas Gleixner <tglx@linutronix.de>
|
|
* Copyright(C) 2006, Hans J. Koch <hjk@linutronix.de>
|
|
* Copyright(C) 2006, Greg Kroah-Hartman <greg@kroah.com>
|
|
*
|
|
* Userspace IO driver.
|
|
*
|
|
* Licensed under the GPLv2 only.
|
|
*/
|
|
|
|
#ifndef _UIO_DRIVER_H_
|
|
#define _UIO_DRIVER_H_
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
struct uio_map;
|
|
|
|
/**
|
|
* struct uio_mem - description of a UIO memory region
|
|
* @addr: address of the device's memory
|
|
* @size: size of IO
|
|
* @memtype: type of memory addr points to
|
|
* @internal_addr: ioremap-ped version of addr, for driver internal use
|
|
* @map: for use by the UIO core only.
|
|
*/
|
|
struct uio_mem {
|
|
unsigned long addr;
|
|
unsigned long size;
|
|
int memtype;
|
|
void __iomem *internal_addr;
|
|
struct uio_map *map;
|
|
};
|
|
|
|
#define MAX_UIO_MAPS 5
|
|
|
|
struct uio_device;
|
|
|
|
/**
|
|
* struct uio_info - UIO device capabilities
|
|
* @uio_dev: the UIO device this info belongs to
|
|
* @name: device name
|
|
* @version: device driver version
|
|
* @mem: list of mappable memory regions, size==0 for end of list
|
|
* @irq: interrupt number or UIO_IRQ_CUSTOM
|
|
* @irq_flags: flags for request_irq()
|
|
* @priv: optional private data
|
|
* @handler: the device's irq handler
|
|
* @mmap: mmap operation for this uio device
|
|
* @open: open operation for this uio device
|
|
* @release: release operation for this uio device
|
|
*/
|
|
struct uio_info {
|
|
struct uio_device *uio_dev;
|
|
char *name;
|
|
char *version;
|
|
struct uio_mem mem[MAX_UIO_MAPS];
|
|
long irq;
|
|
unsigned long irq_flags;
|
|
void *priv;
|
|
irqreturn_t (*handler)(int irq, struct uio_info *dev_info);
|
|
int (*mmap)(struct uio_info *info, struct vm_area_struct *vma);
|
|
int (*open)(struct uio_info *info, struct inode *inode);
|
|
int (*release)(struct uio_info *info, struct inode *inode);
|
|
};
|
|
|
|
extern int __must_check
|
|
__uio_register_device(struct module *owner,
|
|
struct device *parent,
|
|
struct uio_info *info);
|
|
static inline int __must_check
|
|
uio_register_device(struct device *parent, struct uio_info *info)
|
|
{
|
|
return __uio_register_device(THIS_MODULE, parent, info);
|
|
}
|
|
extern void uio_unregister_device(struct uio_info *info);
|
|
extern void uio_event_notify(struct uio_info *info);
|
|
|
|
/* defines for uio_device->irq */
|
|
#define UIO_IRQ_CUSTOM -1
|
|
#define UIO_IRQ_NONE -2
|
|
|
|
/* defines for uio_device->memtype */
|
|
#define UIO_MEM_NONE 0
|
|
#define UIO_MEM_PHYS 1
|
|
#define UIO_MEM_LOGICAL 2
|
|
#define UIO_MEM_VIRTUAL 3
|
|
|
|
#endif /* _LINUX_UIO_DRIVER_H_ */
|