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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/linux/uio_driver.h
2 * include/linux/uio_driver.h
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>
11 * Licensed under the GPLv2 only.
14 #ifndef _UIO_DRIVER_H_
15 #define _UIO_DRIVER_H_
17 #include <linux/device.h>
19 #include <linux/interrupt.h>
25 * struct uio_mem - description of a UIO memory region
26 * @name: name of the memory region for identification
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
32 * @offs: offset of device memory within the page
33 * @size: size of IO (multiple of page size)
34 * @memtype: type of memory addr points to
35 * @internal_addr: ioremap-ped version of addr, for driver internal use
36 * @map: for use by the UIO core only.
44 void __iomem
*internal_addr
;
48 #define MAX_UIO_MAPS 5
53 * struct uio_port - description of a UIO port region
54 * @name: name of the port region for identification
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.
65 struct uio_portio
*portio
;
68 #define MAX_UIO_PORT_REGIONS 5
75 struct fasync_struct
*async_queue
;
76 wait_queue_head_t wait
;
77 struct uio_info
*info
;
78 struct mutex info_lock
;
79 struct kobject
*map_dir
;
80 struct kobject
*portio_dir
;
84 * struct uio_info - UIO device capabilities
85 * @uio_dev: the UIO device this info belongs to
87 * @version: device driver version
88 * @mem: list of mappable memory regions, size==0 for end of list
89 * @port: list of port regions, size==0 for end of list
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
97 * @irqcontrol: disable/enable irqs when 0/1 is written to /dev/uioX
100 struct uio_device
*uio_dev
;
103 struct uio_mem mem
[MAX_UIO_MAPS
];
104 struct uio_port port
[MAX_UIO_PORT_REGIONS
];
106 unsigned long irq_flags
;
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
);
112 int (*irqcontrol
)(struct uio_info
*info
, s32 irq_on
);
115 extern int __must_check
116 __uio_register_device(struct module
*owner
,
117 struct device
*parent
,
118 struct uio_info
*info
);
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)
124 extern void uio_unregister_device(struct uio_info
*info
);
125 extern void uio_event_notify(struct uio_info
*info
);
127 /* defines for uio_info->irq */
128 #define UIO_IRQ_CUSTOM -1
129 #define UIO_IRQ_NONE 0
131 /* defines for uio_mem->memtype */
132 #define UIO_MEM_NONE 0
133 #define UIO_MEM_PHYS 1
134 #define UIO_MEM_LOGICAL 2
135 #define UIO_MEM_VIRTUAL 3
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
143 #endif /* _LINUX_UIO_DRIVER_H_ */