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 struct uio_map;
22
23 /**
24 * struct uio_mem - description of a UIO memory region
25 * @addr: address of the device's memory
26 * @size: size of IO
27 * @memtype: type of memory addr points to
28 * @internal_addr: ioremap-ped version of addr, for driver internal use
29 * @map: for use by the UIO core only.
30 */
31 struct uio_mem {
32 unsigned long addr;
33 unsigned long size;
34 int memtype;
35 void __iomem *internal_addr;
36 struct uio_map *map;
37 };
38
39 #define MAX_UIO_MAPS 5
40
41 struct uio_device;
42
43 /**
44 * struct uio_info - UIO device capabilities
45 * @uio_dev: the UIO device this info belongs to
46 * @name: device name
47 * @version: device driver version
48 * @mem: list of mappable memory regions, size==0 for end of list
49 * @irq: interrupt number or UIO_IRQ_CUSTOM
50 * @irq_flags: flags for request_irq()
51 * @priv: optional private data
52 * @handler: the device's irq handler
53 * @mmap: mmap operation for this uio device
54 * @open: open operation for this uio device
55 * @release: release operation for this uio device
56 */
57 struct uio_info {
58 struct uio_device *uio_dev;
59 char *name;
60 char *version;
61 struct uio_mem mem[MAX_UIO_MAPS];
62 long irq;
63 unsigned long irq_flags;
64 void *priv;
65 irqreturn_t (*handler)(int irq, struct uio_info *dev_info);
66 int (*mmap)(struct uio_info *info, struct vm_area_struct *vma);
67 int (*open)(struct uio_info *info, struct inode *inode);
68 int (*release)(struct uio_info *info, struct inode *inode);
69 };
70
71 extern int __must_check
72 __uio_register_device(struct module *owner,
73 struct device *parent,
74 struct uio_info *info);
75 static inline int __must_check
76 uio_register_device(struct device *parent, struct uio_info *info)
77 {
78 return __uio_register_device(THIS_MODULE, parent, info);
79 }
80 extern void uio_unregister_device(struct uio_info *info);
81 extern void uio_event_notify(struct uio_info *info);
82
83 /* defines for uio_device->irq */
84 #define UIO_IRQ_CUSTOM -1
85 #define UIO_IRQ_NONE -2
86
87 /* defines for uio_device->memtype */
88 #define UIO_MEM_NONE 0
89 #define UIO_MEM_PHYS 1
90 #define UIO_MEM_LOGICAL 2
91 #define UIO_MEM_VIRTUAL 3
92
93 #endif /* _LINUX_UIO_DRIVER_H_ */
94
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