blob: 665517c05eaf2470f57b546a801b8e8bcac03e52 [file] [log] [blame]
* include/linux/uio_driver.h
* Copyright(C) 2005, Benedikt Spranger <>
* Copyright(C) 2005, Thomas Gleixner <>
* Copyright(C) 2006, Hans J. Koch <>
* Copyright(C) 2006, Greg Kroah-Hartman <>
* Userspace IO driver.
* Licensed under the GPLv2 only.
#ifndef _UIO_DRIVER_H_
#define _UIO_DRIVER_H_
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
struct uio_map;
* struct uio_mem - description of a UIO memory region
* @name: name of the memory region for identification
* @addr: address of the device's memory
* @size: size of IO
* @memtype: type of memory addr points to
* @internal_addr: ioremap-ped version of addr, for driver internal use
* @map: for use by the UIO core only.
struct uio_mem {
const char *name;
unsigned long addr;
unsigned long size;
int memtype;
void __iomem *internal_addr;
struct uio_map *map;
#define MAX_UIO_MAPS 5
struct uio_portio;
* struct uio_port - description of a UIO port region
* @name: name of the port region for identification
* @start: start of port region
* @size: size of port region
* @porttype: type of port (see UIO_PORT_* below)
* @portio: for use by the UIO core only.
struct uio_port {
const char *name;
unsigned long start;
unsigned long size;
int porttype;
struct uio_portio *portio;
struct uio_device;
* struct uio_info - UIO device capabilities
* @uio_dev: the UIO device this info belongs to
* @name: device name
* @version: device driver version
* @mem: list of mappable memory regions, size==0 for end of list
* @port: list of port regions, size==0 for end of list
* @irq: interrupt number or UIO_IRQ_CUSTOM
* @irq_flags: flags for request_irq()
* @priv: optional private data
* @handler: the device's irq handler
* @mmap: mmap operation for this uio device
* @open: open operation for this uio device
* @release: release operation for this uio device
* @irqcontrol: disable/enable irqs when 0/1 is written to /dev/uioX
struct uio_info {
struct uio_device *uio_dev;
const char *name;
const char *version;
struct uio_mem mem[MAX_UIO_MAPS];
struct uio_port port[MAX_UIO_PORT_REGIONS];
long irq;
unsigned long irq_flags;
void *priv;
irqreturn_t (*handler)(int irq, struct uio_info *dev_info);
int (*mmap)(struct uio_info *info, struct vm_area_struct *vma);
int (*open)(struct uio_info *info, struct inode *inode);
int (*release)(struct uio_info *info, struct inode *inode);
int (*irqcontrol)(struct uio_info *info, s32 irq_on);
extern int __must_check
__uio_register_device(struct module *owner,
struct device *parent,
struct uio_info *info);
static inline int __must_check
uio_register_device(struct device *parent, struct uio_info *info)
return __uio_register_device(THIS_MODULE, parent, info);
extern void uio_unregister_device(struct uio_info *info);
extern void uio_event_notify(struct uio_info *info);
/* defines for uio_info->irq */
#define UIO_IRQ_CUSTOM -1
#define UIO_IRQ_NONE 0
/* defines for uio_mem->memtype */
#define UIO_MEM_NONE 0
#define UIO_MEM_PHYS 1
/* defines for uio_port->porttype */
#define UIO_PORT_NONE 0
#define UIO_PORT_X86 1
#define UIO_PORT_GPIO 2
#define UIO_PORT_OTHER 3
#endif /* _LINUX_UIO_DRIVER_H_ */