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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 | 40 | |
e70c412e HK |
41 | struct uio_portio; |
42 | ||
43 | /** | |
44 | * struct uio_port - description of a UIO port region | |
45 | * @start: start of port region | |
46 | * @size: size of port region | |
47 | * @porttype: type of port (see UIO_PORT_* below) | |
48 | * @portio: for use by the UIO core only. | |
49 | */ | |
50 | struct uio_port { | |
51 | unsigned long start; | |
52 | unsigned long size; | |
53 | int porttype; | |
54 | struct uio_portio *portio; | |
55 | }; | |
56 | ||
57 | #define MAX_UIO_PORT_REGIONS 5 | |
58 | ||
beafc54c HK |
59 | struct uio_device; |
60 | ||
61 | /** | |
62 | * struct uio_info - UIO device capabilities | |
63 | * @uio_dev: the UIO device this info belongs to | |
64 | * @name: device name | |
65 | * @version: device driver version | |
66 | * @mem: list of mappable memory regions, size==0 for end of list | |
e70c412e | 67 | * @port: list of port regions, size==0 for end of list |
beafc54c HK |
68 | * @irq: interrupt number or UIO_IRQ_CUSTOM |
69 | * @irq_flags: flags for request_irq() | |
70 | * @priv: optional private data | |
71 | * @handler: the device's irq handler | |
72 | * @mmap: mmap operation for this uio device | |
73 | * @open: open operation for this uio device | |
74 | * @release: release operation for this uio device | |
328a14e7 | 75 | * @irqcontrol: disable/enable irqs when 0/1 is written to /dev/uioX |
beafc54c HK |
76 | */ |
77 | struct uio_info { | |
78 | struct uio_device *uio_dev; | |
b8ac9fc0 SR |
79 | const char *name; |
80 | const char *version; | |
beafc54c | 81 | struct uio_mem mem[MAX_UIO_MAPS]; |
e70c412e | 82 | struct uio_port port[MAX_UIO_PORT_REGIONS]; |
beafc54c HK |
83 | long irq; |
84 | unsigned long irq_flags; | |
85 | void *priv; | |
86 | irqreturn_t (*handler)(int irq, struct uio_info *dev_info); | |
87 | int (*mmap)(struct uio_info *info, struct vm_area_struct *vma); | |
88 | int (*open)(struct uio_info *info, struct inode *inode); | |
89 | int (*release)(struct uio_info *info, struct inode *inode); | |
328a14e7 | 90 | int (*irqcontrol)(struct uio_info *info, s32 irq_on); |
beafc54c HK |
91 | }; |
92 | ||
93 | extern int __must_check | |
94 | __uio_register_device(struct module *owner, | |
95 | struct device *parent, | |
96 | struct uio_info *info); | |
97 | static inline int __must_check | |
98 | uio_register_device(struct device *parent, struct uio_info *info) | |
99 | { | |
100 | return __uio_register_device(THIS_MODULE, parent, info); | |
101 | } | |
102 | extern void uio_unregister_device(struct uio_info *info); | |
103 | extern void uio_event_notify(struct uio_info *info); | |
104 | ||
6d8333c2 | 105 | /* defines for uio_info->irq */ |
beafc54c HK |
106 | #define UIO_IRQ_CUSTOM -1 |
107 | #define UIO_IRQ_NONE -2 | |
108 | ||
6d8333c2 | 109 | /* defines for uio_mem->memtype */ |
beafc54c HK |
110 | #define UIO_MEM_NONE 0 |
111 | #define UIO_MEM_PHYS 1 | |
112 | #define UIO_MEM_LOGICAL 2 | |
113 | #define UIO_MEM_VIRTUAL 3 | |
114 | ||
e70c412e HK |
115 | /* defines for uio_port->porttype */ |
116 | #define UIO_PORT_NONE 0 | |
117 | #define UIO_PORT_X86 1 | |
118 | #define UIO_PORT_GPIO 2 | |
119 | #define UIO_PORT_OTHER 3 | |
120 | ||
beafc54c | 121 | #endif /* _LINUX_UIO_DRIVER_H_ */ |