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/module.h>
19 #include <linux/interrupt.h>
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
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.
37 void __iomem
*internal_addr
;
41 #define MAX_UIO_MAPS 5
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.
58 struct uio_portio
*portio
;
61 #define MAX_UIO_PORT_REGIONS 5
66 * struct uio_info - UIO device capabilities
67 * @uio_dev: the UIO device this info belongs to
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
82 struct uio_device
*uio_dev
;
85 struct uio_mem mem
[MAX_UIO_MAPS
];
86 struct uio_port port
[MAX_UIO_PORT_REGIONS
];
88 unsigned long irq_flags
;
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
);
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
)
104 return __uio_register_device(THIS_MODULE
, parent
, info
);
106 extern void uio_unregister_device(struct uio_info
*info
);
107 extern void uio_event_notify(struct uio_info
*info
);
109 /* defines for uio_info->irq */
110 #define UIO_IRQ_CUSTOM -1
111 #define UIO_IRQ_NONE 0
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
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
125 #endif /* _LINUX_UIO_DRIVER_H_ */
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