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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/fs.h> |
18 | #include <linux/interrupt.h> |
19 | |
20 | struct module; |
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 (phys_addr is used since |
27 | * addr can be logical, virtual, or physical & phys_addr_t |
28 | * should always be large enough to handle any of the |
29 | * address types) |
30 | * @size: size of IO |
31 | * @memtype: type of memory addr points to |
32 | * @internal_addr: ioremap-ped version of addr, for driver internal use |
33 | * @map: for use by the UIO core only. |
34 | */ |
35 | struct uio_mem { |
36 | const char *name; |
37 | phys_addr_t addr; |
38 | unsigned long size; |
39 | int memtype; |
40 | void __iomem *internal_addr; |
41 | struct uio_map *map; |
42 | }; |
43 | |
44 | #define MAX_UIO_MAPS 5 |
45 | |
46 | struct uio_portio; |
47 | |
48 | /** |
49 | * struct uio_port - description of a UIO port region |
50 | * @name: name of the port region for identification |
51 | * @start: start of port region |
52 | * @size: size of port region |
53 | * @porttype: type of port (see UIO_PORT_* below) |
54 | * @portio: for use by the UIO core only. |
55 | */ |
56 | struct uio_port { |
57 | const char *name; |
58 | unsigned long start; |
59 | unsigned long size; |
60 | int porttype; |
61 | struct uio_portio *portio; |
62 | }; |
63 | |
64 | #define MAX_UIO_PORT_REGIONS 5 |
65 | |
66 | struct uio_device; |
67 | |
68 | /** |
69 | * struct uio_info - UIO device capabilities |
70 | * @uio_dev: the UIO device this info belongs to |
71 | * @name: device name |
72 | * @version: device driver version |
73 | * @mem: list of mappable memory regions, size==0 for end of list |
74 | * @port: list of port regions, size==0 for end of list |
75 | * @irq: interrupt number or UIO_IRQ_CUSTOM |
76 | * @irq_flags: flags for request_irq() |
77 | * @priv: optional private data |
78 | * @handler: the device's irq handler |
79 | * @mmap: mmap operation for this uio device |
80 | * @open: open operation for this uio device |
81 | * @release: release operation for this uio device |
82 | * @irqcontrol: disable/enable irqs when 0/1 is written to /dev/uioX |
83 | */ |
84 | struct uio_info { |
85 | struct uio_device *uio_dev; |
86 | const char *name; |
87 | const char *version; |
88 | struct uio_mem mem[MAX_UIO_MAPS]; |
89 | struct uio_port port[MAX_UIO_PORT_REGIONS]; |
90 | long irq; |
91 | unsigned long irq_flags; |
92 | void *priv; |
93 | irqreturn_t (*handler)(int irq, struct uio_info *dev_info); |
94 | int (*mmap)(struct uio_info *info, struct vm_area_struct *vma); |
95 | int (*open)(struct uio_info *info, struct inode *inode); |
96 | int (*release)(struct uio_info *info, struct inode *inode); |
97 | int (*irqcontrol)(struct uio_info *info, s32 irq_on); |
98 | }; |
99 | |
100 | extern int __must_check |
101 | __uio_register_device(struct module *owner, |
102 | struct device *parent, |
103 | struct uio_info *info); |
104 | |
105 | /* use a define to avoid include chaining to get THIS_MODULE */ |
106 | #define uio_register_device(parent, info) \ |
107 | __uio_register_device(THIS_MODULE, parent, info) |
108 | |
109 | extern void uio_unregister_device(struct uio_info *info); |
110 | extern void uio_event_notify(struct uio_info *info); |
111 | |
112 | /* defines for uio_info->irq */ |
113 | #define UIO_IRQ_CUSTOM -1 |
114 | #define UIO_IRQ_NONE 0 |
115 | |
116 | /* defines for uio_mem->memtype */ |
117 | #define UIO_MEM_NONE 0 |
118 | #define UIO_MEM_PHYS 1 |
119 | #define UIO_MEM_LOGICAL 2 |
120 | #define UIO_MEM_VIRTUAL 3 |
121 | |
122 | /* defines for uio_port->porttype */ |
123 | #define UIO_PORT_NONE 0 |
124 | #define UIO_PORT_X86 1 |
125 | #define UIO_PORT_GPIO 2 |
126 | #define UIO_PORT_OTHER 3 |
127 | |
128 | #endif /* _LINUX_UIO_DRIVER_H_ */ |
129 |
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