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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@hansjkoch.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 | * @name: name of the memory region for identification |
26 | * @addr: address of the device's memory |
27 | * @size: size of IO |
28 | * @memtype: type of memory addr points to |
29 | * @internal_addr: ioremap-ped version of addr, for driver internal use |
30 | * @map: for use by the UIO core only. |
31 | */ |
32 | struct uio_mem { |
33 | const char *name; |
34 | unsigned long addr; |
35 | unsigned long size; |
36 | int memtype; |
37 | void __iomem *internal_addr; |
38 | struct uio_map *map; |
39 | }; |
40 | |
41 | #define MAX_UIO_MAPS 5 |
42 | |
43 | struct uio_portio; |
44 | |
45 | /** |
46 | * struct uio_port - description of a UIO port region |
47 | * @name: name of the port region for identification |
48 | * @start: start of port region |
49 | * @size: size of port region |
50 | * @porttype: type of port (see UIO_PORT_* below) |
51 | * @portio: for use by the UIO core only. |
52 | */ |
53 | struct uio_port { |
54 | const char *name; |
55 | unsigned long start; |
56 | unsigned long size; |
57 | int porttype; |
58 | struct uio_portio *portio; |
59 | }; |
60 | |
61 | #define MAX_UIO_PORT_REGIONS 5 |
62 | |
63 | struct uio_device; |
64 | |
65 | /** |
66 | * struct uio_info - UIO device capabilities |
67 | * @uio_dev: the UIO device this info belongs to |
68 | * @name: device name |
69 | * @version: device driver version |
70 | * @mem: list of mappable memory regions, size==0 for end of list |
71 | * @port: list of port regions, size==0 for end of list |
72 | * @irq: interrupt number or UIO_IRQ_CUSTOM |
73 | * @irq_flags: flags for request_irq() |
74 | * @priv: optional private data |
75 | * @handler: the device's irq handler |
76 | * @mmap: mmap operation for this uio device |
77 | * @open: open operation for this uio device |
78 | * @release: release operation for this uio device |
79 | * @irqcontrol: disable/enable irqs when 0/1 is written to /dev/uioX |
80 | */ |
81 | struct uio_info { |
82 | struct uio_device *uio_dev; |
83 | const char *name; |
84 | const char *version; |
85 | struct uio_mem mem[MAX_UIO_MAPS]; |
86 | struct uio_port port[MAX_UIO_PORT_REGIONS]; |
87 | long irq; |
88 | unsigned long irq_flags; |
89 | void *priv; |
90 | irqreturn_t (*handler)(int irq, struct uio_info *dev_info); |
91 | int (*mmap)(struct uio_info *info, struct vm_area_struct *vma); |
92 | int (*open)(struct uio_info *info, struct inode *inode); |
93 | int (*release)(struct uio_info *info, struct inode *inode); |
94 | int (*irqcontrol)(struct uio_info *info, s32 irq_on); |
95 | }; |
96 | |
97 | extern int __must_check |
98 | __uio_register_device(struct module *owner, |
99 | struct device *parent, |
100 | struct uio_info *info); |
101 | static inline int __must_check |
102 | uio_register_device(struct device *parent, struct uio_info *info) |
103 | { |
104 | return __uio_register_device(THIS_MODULE, parent, info); |
105 | } |
106 | extern void uio_unregister_device(struct uio_info *info); |
107 | extern void uio_event_notify(struct uio_info *info); |
108 | |
109 | /* defines for uio_info->irq */ |
110 | #define UIO_IRQ_CUSTOM -1 |
111 | #define UIO_IRQ_NONE 0 |
112 | |
113 | /* defines for uio_mem->memtype */ |
114 | #define UIO_MEM_NONE 0 |
115 | #define UIO_MEM_PHYS 1 |
116 | #define UIO_MEM_LOGICAL 2 |
117 | #define UIO_MEM_VIRTUAL 3 |
118 | |
119 | /* defines for uio_port->porttype */ |
120 | #define UIO_PORT_NONE 0 |
121 | #define UIO_PORT_X86 1 |
122 | #define UIO_PORT_GPIO 2 |
123 | #define UIO_PORT_OTHER 3 |
124 | |
125 | #endif /* _LINUX_UIO_DRIVER_H_ */ |
126 |
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