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