1 /* 2 * include/linux/uio_driver.h 3 * 4 * Copyright(C) 2005, Benedikt Spranger <[email protected]> 5 * Copyright(C) 2005, Thomas Gleixner <[email protected]> 6 * Copyright(C) 2006, Hans J. Koch <[email protected]> 7 * Copyright(C) 2006, Greg Kroah-Hartman <[email protected]> 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 17 #include <linux/module.h> 18 #include <linux/fs.h> 19 #include <linux/interrupt.h> 20 21 struct uio_map; 22 23 /** 24 * struct uio_mem - description of a UIO memory region 25 * @addr: address of the device's memory 26 * @size: size of IO 27 * @memtype: type of memory addr points to 28 * @internal_addr: ioremap-ped version of addr, for driver internal use 29 * @map: for use by the UIO core only. 30 */ 31 struct uio_mem { 32 unsigned long addr; 33 unsigned long size; 34 int memtype; 35 void __iomem *internal_addr; 36 struct uio_map *map; 37 }; 38 39 #define MAX_UIO_MAPS 5 40 41 struct uio_device; 42 43 /** 44 * struct uio_info - UIO device capabilities 45 * @uio_dev: the UIO device this info belongs to 46 * @name: device name 47 * @version: device driver version 48 * @mem: list of mappable memory regions, size==0 for end of list 49 * @irq: interrupt number or UIO_IRQ_CUSTOM 50 * @irq_flags: flags for request_irq() 51 * @priv: optional private data 52 * @handler: the device's irq handler 53 * @mmap: mmap operation for this uio device 54 * @open: open operation for this uio device 55 * @release: release operation for this uio device 56 */ 57 struct uio_info { 58 struct uio_device *uio_dev; 59 char *name; 60 char *version; 61 struct uio_mem mem[MAX_UIO_MAPS]; 62 long irq; 63 unsigned long irq_flags; 64 void *priv; 65 irqreturn_t (*handler)(int irq, struct uio_info *dev_info); 66 int (*mmap)(struct uio_info *info, struct vm_area_struct *vma); 67 int (*open)(struct uio_info *info, struct inode *inode); 68 int (*release)(struct uio_info *info, struct inode *inode); 69 }; 70 71 extern int __must_check 72 __uio_register_device(struct module *owner, 73 struct device *parent, 74 struct uio_info *info); 75 static inline int __must_check 76 uio_register_device(struct device *parent, struct uio_info *info) 77 { 78 return __uio_register_device(THIS_MODULE, parent, info); 79 } 80 extern void uio_unregister_device(struct uio_info *info); 81 extern void uio_event_notify(struct uio_info *info); 82 83 /* defines for uio_device->irq */ 84 #define UIO_IRQ_CUSTOM -1 85 #define UIO_IRQ_NONE -2 86 87 /* defines for uio_device->memtype */ 88 #define UIO_MEM_NONE 0 89 #define UIO_MEM_PHYS 1 90 #define UIO_MEM_LOGICAL 2 91 #define UIO_MEM_VIRTUAL 3 92 93 #endif /* _LINUX_UIO_DRIVER_H_ */ 94