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beafc54c HK |
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 | */ | |
29 | struct 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 | ||
39 | struct 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 | */ | |
55 | struct 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 | ||
69 | extern int __must_check | |
70 | __uio_register_device(struct module *owner, | |
71 | struct device *parent, | |
72 | struct uio_info *info); | |
73 | static 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 | } | |
78 | extern void uio_unregister_device(struct uio_info *info); | |
79 | extern 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_ */ |