Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * include/linux/uio_driver.h
3 *
4 * Copyright(C) 2005, Benedikt Spranger <b.spranger@linutronix.de>
5 * Copyright(C) 2005, Thomas Gleixner <tglx@linutronix.de>
6 * Copyright(C) 2006, Hans J. Koch <hjk@linutronix.de>
7 * Copyright(C) 2006, Greg Kroah-Hartman <greg@kroah.com>
8 *
9 * Userspace IO driver.
10 *
11 * Licensed under the GPLv2 only.
12 */
13
14#ifndef _UIO_DRIVER_H_
15#define _UIO_DRIVER_H_
16
17#include <linux/module.h>
18#include <linux/fs.h>
19#include <linux/interrupt.h>
20
21/**
22 * struct uio_mem - description of a UIO memory region
23 * @kobj: kobject for this mapping
24 * @addr: address of the device's memory
25 * @size: size of IO
26 * @memtype: type of memory addr points to
27 * @internal_addr: ioremap-ped version of addr, for driver internal use
28 */
29struct uio_mem {
30 struct kobject kobj;
31 unsigned long addr;
32 unsigned long size;
33 int memtype;
34 void __iomem *internal_addr;
35};
36
37#define MAX_UIO_MAPS 5
38
39struct uio_device;
40
41/**
42 * struct uio_info - UIO device capabilities
43 * @uio_dev: the UIO device this info belongs to
44 * @name: device name
45 * @version: device driver version
46 * @mem: list of mappable memory regions, size==0 for end of list
47 * @irq: interrupt number or UIO_IRQ_CUSTOM
48 * @irq_flags: flags for request_irq()
49 * @priv: optional private data
50 * @handler: the device's irq handler
51 * @mmap: mmap operation for this uio device
52 * @open: open operation for this uio device
53 * @release: release operation for this uio device
54 */
55struct uio_info {
56 struct uio_device *uio_dev;
57 char *name;
58 char *version;
59 struct uio_mem mem[MAX_UIO_MAPS];
60 long irq;
61 unsigned long irq_flags;
62 void *priv;
63 irqreturn_t (*handler)(int irq, struct uio_info *dev_info);
64 int (*mmap)(struct uio_info *info, struct vm_area_struct *vma);
65 int (*open)(struct uio_info *info, struct inode *inode);
66 int (*release)(struct uio_info *info, struct inode *inode);
67};
68
69extern int __must_check
70 __uio_register_device(struct module *owner,
71 struct device *parent,
72 struct uio_info *info);
73static inline int __must_check
74 uio_register_device(struct device *parent, struct uio_info *info)
75{
76 return __uio_register_device(THIS_MODULE, parent, info);
77}
78extern void uio_unregister_device(struct uio_info *info);
79extern void uio_event_notify(struct uio_info *info);
80
81/* defines for uio_device->irq */
82#define UIO_IRQ_CUSTOM -1
83#define UIO_IRQ_NONE -2
84
85/* defines for uio_device->memtype */
86#define UIO_MEM_NONE 0
87#define UIO_MEM_PHYS 1
88#define UIO_MEM_LOGICAL 2
89#define UIO_MEM_VIRTUAL 3
90
91#endif /* _LINUX_UIO_DRIVER_H_ */