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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 | ||
81e7c6a6 GKH |
21 | struct uio_map; |
22 | ||
beafc54c HK |
23 | /** |
24 | * struct uio_mem - description of a UIO memory region | |
beafc54c HK |
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 | |
81e7c6a6 | 29 | * @map: for use by the UIO core only. |
beafc54c HK |
30 | */ |
31 | struct uio_mem { | |
beafc54c HK |
32 | unsigned long addr; |
33 | unsigned long size; | |
34 | int memtype; | |
35 | void __iomem *internal_addr; | |
81e7c6a6 | 36 | struct uio_map *map; |
beafc54c HK |
37 | }; |
38 | ||
6d8333c2 | 39 | #define MAX_UIO_MAPS 5 |
beafc54c HK |
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 | |
328a14e7 | 56 | * @irqcontrol: disable/enable irqs when 0/1 is written to /dev/uioX |
beafc54c HK |
57 | */ |
58 | struct uio_info { | |
59 | struct uio_device *uio_dev; | |
60 | char *name; | |
61 | char *version; | |
62 | struct uio_mem mem[MAX_UIO_MAPS]; | |
63 | long irq; | |
64 | unsigned long irq_flags; | |
65 | void *priv; | |
66 | irqreturn_t (*handler)(int irq, struct uio_info *dev_info); | |
67 | int (*mmap)(struct uio_info *info, struct vm_area_struct *vma); | |
68 | int (*open)(struct uio_info *info, struct inode *inode); | |
69 | int (*release)(struct uio_info *info, struct inode *inode); | |
328a14e7 | 70 | int (*irqcontrol)(struct uio_info *info, s32 irq_on); |
beafc54c HK |
71 | }; |
72 | ||
73 | extern int __must_check | |
74 | __uio_register_device(struct module *owner, | |
75 | struct device *parent, | |
76 | struct uio_info *info); | |
77 | static inline int __must_check | |
78 | uio_register_device(struct device *parent, struct uio_info *info) | |
79 | { | |
80 | return __uio_register_device(THIS_MODULE, parent, info); | |
81 | } | |
82 | extern void uio_unregister_device(struct uio_info *info); | |
83 | extern void uio_event_notify(struct uio_info *info); | |
84 | ||
6d8333c2 | 85 | /* defines for uio_info->irq */ |
beafc54c HK |
86 | #define UIO_IRQ_CUSTOM -1 |
87 | #define UIO_IRQ_NONE -2 | |
88 | ||
6d8333c2 | 89 | /* defines for uio_mem->memtype */ |
beafc54c HK |
90 | #define UIO_MEM_NONE 0 |
91 | #define UIO_MEM_PHYS 1 | |
92 | #define UIO_MEM_LOGICAL 2 | |
93 | #define UIO_MEM_VIRTUAL 3 | |
94 | ||
95 | #endif /* _LINUX_UIO_DRIVER_H_ */ |