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Commit | Line | Data |
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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> | |
318af55d | 6 | * Copyright(C) 2006, Hans J. Koch <hjk@hansjkoch.de> |
beafc54c HK |
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 | ||
19566f95 | 17 | #include <linux/device.h> |
beafc54c HK |
18 | #include <linux/fs.h> |
19 | #include <linux/interrupt.h> | |
20 | ||
de477254 | 21 | struct module; |
81e7c6a6 GKH |
22 | struct uio_map; |
23 | ||
beafc54c HK |
24 | /** |
25 | * struct uio_mem - description of a UIO memory region | |
82057791 | 26 | * @name: name of the memory region for identification |
171058fb MS |
27 | * @addr: address of the device's memory rounded to page |
28 | * size (phys_addr is used since addr can be | |
29 | * logical, virtual, or physical & phys_addr_t | |
30 | * should always be large enough to handle any of | |
31 | * the address types) | |
32 | * @offs: offset of device memory within the page | |
33 | * @size: size of IO (multiple of page size) | |
beafc54c HK |
34 | * @memtype: type of memory addr points to |
35 | * @internal_addr: ioremap-ped version of addr, for driver internal use | |
81e7c6a6 | 36 | * @map: for use by the UIO core only. |
beafc54c HK |
37 | */ |
38 | struct uio_mem { | |
82057791 | 39 | const char *name; |
27a90700 | 40 | phys_addr_t addr; |
171058fb | 41 | unsigned long offs; |
e0f1147c | 42 | resource_size_t size; |
beafc54c HK |
43 | int memtype; |
44 | void __iomem *internal_addr; | |
81e7c6a6 | 45 | struct uio_map *map; |
beafc54c HK |
46 | }; |
47 | ||
6d8333c2 | 48 | #define MAX_UIO_MAPS 5 |
beafc54c | 49 | |
e70c412e HK |
50 | struct uio_portio; |
51 | ||
52 | /** | |
53 | * struct uio_port - description of a UIO port region | |
82057791 | 54 | * @name: name of the port region for identification |
e70c412e HK |
55 | * @start: start of port region |
56 | * @size: size of port region | |
57 | * @porttype: type of port (see UIO_PORT_* below) | |
58 | * @portio: for use by the UIO core only. | |
59 | */ | |
60 | struct uio_port { | |
82057791 | 61 | const char *name; |
e70c412e HK |
62 | unsigned long start; |
63 | unsigned long size; | |
64 | int porttype; | |
65 | struct uio_portio *portio; | |
66 | }; | |
67 | ||
68 | #define MAX_UIO_PORT_REGIONS 5 | |
69 | ||
f14bb039 AG |
70 | struct uio_device { |
71 | struct module *owner; | |
19566f95 | 72 | struct device dev; |
f14bb039 AG |
73 | int minor; |
74 | atomic_t event; | |
75 | struct fasync_struct *async_queue; | |
76 | wait_queue_head_t wait; | |
77 | struct uio_info *info; | |
19566f95 | 78 | spinlock_t info_lock; |
f14bb039 AG |
79 | struct kobject *map_dir; |
80 | struct kobject *portio_dir; | |
81 | }; | |
beafc54c HK |
82 | |
83 | /** | |
84 | * struct uio_info - UIO device capabilities | |
85 | * @uio_dev: the UIO device this info belongs to | |
86 | * @name: device name | |
87 | * @version: device driver version | |
88 | * @mem: list of mappable memory regions, size==0 for end of list | |
e70c412e | 89 | * @port: list of port regions, size==0 for end of list |
beafc54c HK |
90 | * @irq: interrupt number or UIO_IRQ_CUSTOM |
91 | * @irq_flags: flags for request_irq() | |
92 | * @priv: optional private data | |
93 | * @handler: the device's irq handler | |
94 | * @mmap: mmap operation for this uio device | |
95 | * @open: open operation for this uio device | |
96 | * @release: release operation for this uio device | |
328a14e7 | 97 | * @irqcontrol: disable/enable irqs when 0/1 is written to /dev/uioX |
beafc54c HK |
98 | */ |
99 | struct uio_info { | |
100 | struct uio_device *uio_dev; | |
b8ac9fc0 SR |
101 | const char *name; |
102 | const char *version; | |
beafc54c | 103 | struct uio_mem mem[MAX_UIO_MAPS]; |
e70c412e | 104 | struct uio_port port[MAX_UIO_PORT_REGIONS]; |
beafc54c HK |
105 | long irq; |
106 | unsigned long irq_flags; | |
107 | void *priv; | |
108 | irqreturn_t (*handler)(int irq, struct uio_info *dev_info); | |
109 | int (*mmap)(struct uio_info *info, struct vm_area_struct *vma); | |
110 | int (*open)(struct uio_info *info, struct inode *inode); | |
111 | int (*release)(struct uio_info *info, struct inode *inode); | |
328a14e7 | 112 | int (*irqcontrol)(struct uio_info *info, s32 irq_on); |
beafc54c HK |
113 | }; |
114 | ||
115 | extern int __must_check | |
116 | __uio_register_device(struct module *owner, | |
117 | struct device *parent, | |
118 | struct uio_info *info); | |
eb5589a8 PG |
119 | |
120 | /* use a define to avoid include chaining to get THIS_MODULE */ | |
121 | #define uio_register_device(parent, info) \ | |
122 | __uio_register_device(THIS_MODULE, parent, info) | |
123 | ||
beafc54c HK |
124 | extern void uio_unregister_device(struct uio_info *info); |
125 | extern void uio_event_notify(struct uio_info *info); | |
126 | ||
6d8333c2 | 127 | /* defines for uio_info->irq */ |
beafc54c | 128 | #define UIO_IRQ_CUSTOM -1 |
6427a765 | 129 | #define UIO_IRQ_NONE 0 |
beafc54c | 130 | |
6d8333c2 | 131 | /* defines for uio_mem->memtype */ |
beafc54c HK |
132 | #define UIO_MEM_NONE 0 |
133 | #define UIO_MEM_PHYS 1 | |
134 | #define UIO_MEM_LOGICAL 2 | |
135 | #define UIO_MEM_VIRTUAL 3 | |
136 | ||
e70c412e HK |
137 | /* defines for uio_port->porttype */ |
138 | #define UIO_PORT_NONE 0 | |
139 | #define UIO_PORT_X86 1 | |
140 | #define UIO_PORT_GPIO 2 | |
141 | #define UIO_PORT_OTHER 3 | |
142 | ||
beafc54c | 143 | #endif /* _LINUX_UIO_DRIVER_H_ */ |