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_
18 #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 (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
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.
40 void __iomem *internal_addr;
44 #define MAX_UIO_MAPS 5
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.
61 struct uio_portio *portio;
64 #define MAX_UIO_PORT_REGIONS 5
69 * struct uio_info - UIO device capabilities
70 * @uio_dev: the UIO device this info belongs to
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
85 struct uio_device *uio_dev;
88 struct uio_mem mem[MAX_UIO_MAPS];
89 struct uio_port port[MAX_UIO_PORT_REGIONS];
91 unsigned long irq_flags;
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);
100 extern int __must_check
101 __uio_register_device(struct module *owner,
102 struct device *parent,
103 struct uio_info *info);
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)
109 extern void uio_unregister_device(struct uio_info *info);
110 extern void uio_event_notify(struct uio_info *info);
112 /* defines for uio_info->irq */
113 #define UIO_IRQ_CUSTOM -1
114 #define UIO_IRQ_NONE 0
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
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
128 #endif /* _LINUX_UIO_DRIVER_H_ */